ZTE LR14 LTE FDD Power Control Feature Guide
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ZTE LTE FDD Power Control Feature Guide LR14
ZTE LTE FDD Power Control Feature Guide Version
V 1.0
V 2.0
V3.0
Date
Author
Reviewer
Notes
2013-7-14
Wang Fei
Zhang Qian Wu Jiwen
Not open to the third party
2014-05-15
Wang Fei Hou Mengjie Yao Xin
Li Nana
Add the chapter 5.
Li Nana
Add Chapter 7: Impact on Network Add full names for some abbreviations Modify some wrong spellings Modify chapter 4 according to ZXSDR UniRAN FDD-LTE Base Station (V3.20.50) Radio Parameter Reference Change the word template
2014-12-23
Wang Fei Chen Huijuan
© 2015 ZTE Corporation. All rights reserved. ZTE CONFIDENTIAL: This document contains proprietary information of ZTE and is not to be disclosed or used without the prior written permission of ZTE. Due to update and improvement of ZTE products and technologies, information in this document is subjected to change without notice.
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I
TABLE OF CONTENTS 1 1.1 1.2 1.3 1.4
Introduction............ Introductio n............................ ................................. .................................. .................................. ................................. ......................... ......... 1 Scope Scop e ............................... ................................................ ................................. ................................. .................................. .................................. ................. 1 Targett Group Targe Group ............................... ................................................ .................................. .................................. .................................. ...................... ..... 1 Feature Attributes.................. ......... ................... ................... ................... ................... .................. .................. ................... ................... ............. .... 1 Correlation with Other Features ........................................................................... 2
2
Definition Defin ition ................................. ................................................. ................................. .................................. .................................. ......................... ........ 2
3 3.1 3.1.1 3.1.2 3.1.3 3.1.4 3.1.5
3.2.8 3.2.9
Technical Description ....................................................................................... 3 Feature Description .............................................................................................. 3 PUSCH Power Control ......................................................................................... 4 PUCCH Power Control ......................................................................................... 4 SRS Power Control .............................................................................................. 5 PRACH Power Control ......................................................................................... 5 Downlink Physical Channels or Signal Power Offsets Related to Cell Reference Signals Signa ls ................................ ................................................. ................................. ................................. .................................. ............................... .............. 5 Logical Downlink Channel Power Offsets Related to Cell Reference Signals ....... 6 Technical Description ........................................................................................... 6 PUSCH Open-Loop Power Control ...................................................................... 6 PUSCH Closed-Loop Power Control .................................................................... 8 PUCCH Open-Loop Power Control .................................................................... 13 PUCCH Closed-Loop Power Control .................................................................. 14 SRS Power Control ............................................................................................ 16 PRACH Open-Loop Power Control .................................................................... 17 Configuring the Transmit Power of a Downlink Physical Channel, Signal, or Logical Channel ................................................................................................. 18 Downlink Physical Physical Channel, Signal, or Power Offset .................. ......... ................... ................... .............. ..... 19 Power Offset of a Downlink Logical Logical Channel .................. ......... ................... ................... .................. ................. ........ 19
4 4.1 4.1.1 4.1.2 4.1.3 4.2 4.2.1 4.2.2 4.2.3 4.3 4.3.1 4.3.2 4.3.3 4.4 4.4.1 4.4.2 4.4.3 4.5
Key Parameters and Configuration ................................................................ 19 PUSCH Open-Loop Power Control .................................................................... 19 Parameters List .................................................................................................. 19 Parameter Configuration Rule ............................................................................ 20 Configuration Description ................................................................................... 22 PUSCH Closed-Loop Power Control .................................................................. 26 Parameters List .................................................................................................. 26 Parameter Configuration Rule ............................................................................ 26 Configuration Description ................................................................................... 30 PUCCH Open-Loop Power Control .................................................................... 36 Parameters List .................................................................................................. 36 Parameter Configuration Rule ............................................................................ 37 Configuration Description ................................................................................... 39 PUCCH Close-Loop Power Control .................................................................... 42 Parameters List .................................................................................................. 42 Parameter Configuration Rule ............................................................................ 43 Configuration Description ................................................................................... 46 SRS Power Control ............................................................................................ 49
3.1.6 3.2 3.2.1 3.2.2 3.2.3 3.2.4 3.2.5 3.2.6 3.2.7
4.5.1 4.5.2 4.5.3 4.6 4.6.1 4.6.2 4.6.3 4.7 4.7.1 4.7.2 4.7.3
Parameters List .................................................................................................. Parameter Configuration Rule ............................................................................ Configuration Description ................................................................................... PRACH Power Control ....................................................................................... Parameters List .................................................................................................. Parameter Configuration Rule ............................................................................ Configuration Description ................................................................................... Downlink Power Allocation ................................................................................. Parameters List .................................................................................................. Parameter Configuration Rule ............................................................................ Configuration Description ...................................................................................
5 5.1 5.1.1 5.1.2 5.1.3 5.2 5.2.1 5.2.2 5.2.3
Feature Validation............................................................................................ 72 PUSCH Open-Loop Power Control .................................................................... 72 Topology Topol ogy ................................ ................................................ .................................. .................................. ................................. .......................... ......... 72 Test Specification ............................................................................................... 72 Test Result Result ............................... ................................................ .................................. .................................. .................................. ....................... ...... 74 PUSCH Closed-Loop Power Control .................................................................. 76 Topology Topol ogy ................................ ................................................ .................................. .................................. ................................. .......................... ......... 76 Test Specification ............................................................................................... 76 Test Result Result ............................... ................................................ .................................. .................................. .................................. ....................... ...... 77
5.3 5.3.1 5.3.2 5.3.3 5.4 5.4.1 5.4.2 5.4.3 5.5 5.5.1 5.5.2 5.5.3 5.6 5.6.1 5.6.2
PUCCH Power Control .................................................................... Topology Topol ogyOpen-Loop ................................ ................................................ .................................. .................................. ................................. .......................... ......... 79 79 Test Specification ............................................................................................... 79 Test Result Result ............................... ................................................ .................................. .................................. .................................. ....................... ...... 80 PUCCH Closed-Loop Power Control .................................................................. 82 Topology Topol ogy ................................ ................................................ .................................. .................................. ................................. .......................... ......... 82 Test Specification ............................................................................................... 82 Test Result Result ............................... ................................................ .................................. .................................. .................................. ....................... ...... 83 SRS Power Control ............................................................................................ 84 Topology Topol ogy ................................ ................................................ .................................. .................................. ................................. .......................... ......... 84 Test Specification ............................................................................................... 84 Test Result Result ............................... ................................................ .................................. .................................. .................................. ....................... ...... 85 PRACH Open-Loop Power Control .................................................................... 87 Topology Topol ogy ................................ ................................................ .................................. .................................. ................................. .......................... ......... 87 Test Specification ............................................................................................... 87
5.6.3 5.7 5.7.1 5.7.2 5.7.3
Test Result Result ............................... ................................................ .................................. .................................. .................................. ....................... ...... 88 Downlink Power Allocation ................................................................................. 90 Topology Topol ogy ................................ ................................................ .................................. .................................. ................................. .......................... ......... 90 Test Specification ............................................................................................... 91 Test Result Check .............................................................................................. 91
6 6.1 6.2 6.3
Related Counters, KPI and Alarms ................................................................. 93 Related Counters ............................................................................................... 93 Related Rela ted KPI ................................. .................................................. .................................. .................................. .................................. .................... ... 93 Related Rela ted Alarms......... Alarms......................... ................................. .................................. .................................. ................................. ....................... ....... 93
7
Impact on Network ........................................................................................... 94
8
Abbrevia Abbr eviations tions............................... ................................................ .................................. ................................. ................................. ................... 94
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III
49 50 53 59 59 59 61 63 63 63 69
FIGURES Figure 3-1
Mapping Between Between Uplink Transport Channels Channels and Uplink Physical Physical Channel Channels s ..... 3
Figure 3-2
Mapping Between Downlink Transport Channels and Downlink Physical
Channels Channel s ................................ ................................................. .................................. ................................. ................................. .................................. ............................. ............ 3 Figure 3-3 UE PRACH power ramp up process ................... ......... ................... .................. .................. ................... ................... ......... 18 Figure 4-1 4-1
Configuring Configuring to active PUSCH Open-Loop Power Control ................... ......... ................... ............... ...... 23
Figure 4-2 Configuring Configuring the parameters parameters of PUSCH PUSCH Open-Loop power control control .................. ......... ............ ... 24 Figure 4-3 4-3
Configuring Configuring the parameter parameter of PUSCH PUSCH Power Power Offset ................... ......... ................... ................... .............. .... 24
Figure 4-4 Configuring Configuring to deactivate deactivate PUSCH PUSCH Open-Loop Power Control Control .................. ........ ................... ......... 25 Figure 4-5 Configuring Configuring to active active PUSCH PUSCH Close-Loop Close-Loop Power Power Control................... ......... ................... ............... ...... 31 Figure 4-6 Configuring Configuring PUSCH closed loop loop power control types .................. ......... ................... ................... ............ ... 32 Figure 4-7 Configuring Configuring the parameters parameters of PUSCH PUSCH Open-Loop power control control .................. ......... ............ ... 33 Figure 4-8
Configuring Configuring the Parameter of PUSCH PUSCH Power Offset................. Offset........ ................... ................... ............... ...... 34
Figure 4-9 Configuring Configuring DCI3/3A Parameters ................... ......... ................... .................. ................... ................... .................. .............. ..... 35 Figure 4-10 Configuring Configuring to deactivate deactivate PUSCH Close-Loop Power Power Control Control ................... .......... ............... ...... 36 Figure 4-11 Configuring Configuring to active active PUCCH PUCCH Open-Loop Power Control Control .................. ......... ................... .............. .... 39 Figure 4-12 Configuring Configuring the Parameters Parameters of PUCCH PUCCH Open-Loop Power Control Control ................. ......... ........ 40 Figure 4-13 Configuring Configuring the Parameter Parameter of PUCCH PUCCH Power Power Offset of UE................... .......... ................... ............ 41 Figure 4-14 Configuring Configuring to deactivate deactivate PUCCH PUCCH Open-Loop Open-Loop Power Power Control ................... .......... ............... ...... 42 Figure 4-15 Configuring Configuring to active PUCCH PUCCH Close-Loop Close-Loop Power Power Control.................. ......... ................... .............. .... 46 Figure 4-16 Configuring Configuring the parameters parameters of PUCCH PUCCH Close-Loop Close-Loop power power control .................. ......... ......... 47 Figure 4-17 Configuring the Parameter Parameter of PUCCH PUCCH Power Power Offset of UE................... .......... ................... ............ 47 Figure 4-18
Configuring Configuring DCI3/3A Parameters .................. ......... ................... ................... .................. ................... ................... ............ ... 48
Figure 4-19 Configuring Configuring to deactivate deactivate PUCCH Close-Loop Power Power Control Control ................... .......... ............... ...... 49 Figure 4-20 Configuring Configuring SRS Power Control type ................... ......... ................... .................. ................... ................... ............... ...... 54 Figure 4-21
Configuring Configuring SRS SRS Close Close Loop Loop Power Power Control Control Type ................... ......... ................... ................... .............. .... 55
Figure 4-22
Configuring Configuring the parameters parameters of SRS power control..................... control............ ................... ................... ............ ... 56
Figure 4-23 Configuring Configuring the Parameter of of Power Offset of SRS Relative Relative to PUSCH.......... ......... . 56 Figure 4-24 Configuring Configuring the Parameter Parameter of PUSCH PUSCH Power Power offset of UE................... ......... ................... ............ ... 57 Figure 4-25
Configuring Configuring DCI3/3A Parameters .................. ......... ................... ................... .................. ................... ................... ............ ... 58
Figure 4-26
Configuring Configuring the Power offset offset based on PRACH message parameter parameter .............. .......... .... 61
Figure 4-27 Configuring Configuring the other parameters parameters of PUCCH Close-Loop Close-Loop power power control ......... 62 Figure 4-28 configuring the Referenced Referenced signal power of BP BP resource parameter parameter ............... ......... ...... 70
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Figure 4-29 Configuring Configuring the Power Power offset parameters parameters of down downlink link logical logical channel ............. ......... .... 71 Figure 5-1 5-1
Topology of PUSCH PUSCH Open-Loop Open-Loop Power Power Control Control Test .................. ......... ................... ................... ............ ... 72
Figure Figu re 5-2
p-max p-max ................................ ................................................. ................................. ................................. .................................. .............................. ............. 74
Figure 5-3 5-3
SIB2 Contains Contains Uplink Uplink Power Power Control Control Parameters Parameters .................. ......... ................... ................... .................. ......... 74
Figure 5-4
P0-UE-PUSCH Information ................... ......... ................... .................. ................... ................... .................. ................... .............. .... 74
Figure 5-5
Number of RBs in the D DCI CI Information ................... ......... ................... .................. ................... ................... ............... ...... 75
Figure 5-6
PUSCH Transmit Power Observed on the UE Side.................... Side.......... ................... ................... .............. .... 75
Figure 5-7
DCI0 Message Received .................. ......... ................... ................... ................... ................... .................. .................. ................. ........ 78
Figure 5-8
PUSCH Power ................... ......... ................... .................. ................... ................... .................. ................... ................... ................... .............. .... 78
Figure 5-9
PUCCH Power Parameters in SIB2 .................. ......... .................. .................. ................... ................... .................. ........... .. 80
Figure 5-10 PUCCH Power Parameters Parameter s in the RRC Connection Reconfiguration Message Message .................................. ................. ................................. ................................. ................................. ................................. ................................. .................................. ......................... ....... 81 Figure 5-11
PUCCH Transmit Power Information.................. ......... ................... ................... .................. .................. ................. ........ 81
Figure 5-12 5-12
Result of of PUCCH PUCCH Closed-Loop Closed-Loop Power Control Control ................... ......... ................... .................. ................... ............ 83
Figure 5-13
SRS Power Parameters in SIB2 ......... ................... ................... .................. ................... ................... .................. .............. ..... 85
Figure 5-14
Re-configured SRS and PUSCH Parameters ................... .......... ................... ................... .................. ............ ... 86
Figure 5-15
SRS Power Result ................... ......... ................... .................. ................... ................... .................. ................... ................... ............... ...... 86
Figure 5-16
PRACH Power Parameters in SIB2 ................... ......... ................... .................. .................. ................... ................... ......... 88
Figure 5-17
Number of MSG1 Transmission Times.................. ......... ................... ................... .................. ................... .............. .... 89
Figure 5-18
Path Loss Loss Shown Shown in the LTE PUSCH PUSCH Control Log ................... ......... ................... ................... .............. .... 89
Figure 5-19 Preamble Format and PRACH PRACH transmit transmit Power Shown Shown in MSG1 MSG1 .................. ......... ............ ... 90 Figure 5-20
P-A Value.................. ......... ................... ................... ................... ................... .................. .................. ................... ................... .................. ........... .. 92
Figure 5-21
P_B Value Being the Same Same as RS Value Value ................... .......... .................. .................. ................... ................... ......... 93
TABLES Table 3-1 Mapping of TPC Command Field in DCI format 0/3 to absolute and accumulated accumulate d PUSCH values values .................................. .................................................. ................................. ................................. .................................. .................................. .................. .. 12 Table 3-2 3-2
Mapping of TPC Command Field in in DCI DCI format 1A/1/2A/2/3 to PUCCH values... 15
Table 4-1
Parameters List ......... ................... ................... .................. ................... ................... .................. ................... ................... ................... .............. .... 19
Table 4-2
Configuration Configuration rule of parameters ................... .......... ................... ................... .................. ................... ................... ............... ...... 20
Table 4-3
Parameters List ......... ................... ................... .................. ................... ................... .................. ................... ................... ................... .............. .... 26
Table 4-4
Configuration Configuration rule of parameters ................... .......... ................... ................... .................. ................... ................... ............... ...... 26
Table 4-5
Parameters List ......... ................... ................... .................. ................... ................... .................. ................... ................... ................... .............. .... 36
Table 4-6
Configuration Configuration rule of parameters ................... .......... ................... ................... .................. ................... ................... ............... ...... 37
Table 4-7
Parameters List ......... ................... ................... .................. ................... ................... .................. ................... ................... ................... .............. .... 42
Table 4-8
Configuration Configuration rule of parameters ................... .......... ................... ................... .................. ................... ................... ............... ...... 43
Table 4-9
Parameters List ......... ................... ................... .................. ................... ................... .................. ................... ................... ................... .............. .... 49
Table 4-10
Configuration Configuration rule of parameters ................... ......... ................... .................. ................... ................... .................. .............. ..... 50
Table 4-11
Parameters List .................. ......... ................... ................... .................. ................... ................... .................. ................... ................... ............ ... 59
Table 4-12
Configuration Configuration rule of parameters ................... ......... ................... .................. ................... ................... .................. .............. ..... 59
Table 4-13
Parameters List .................. ......... ................... ................... .................. ................... ................... .................. ................... ................... ............ ... 63
Table 4-14
Configuration Configuration rule of parameters ................... ......... ................... .................. ................... ................... .................. .............. ..... 63
Table 5-1
Equipment Equipment Requirements of of the PUSCH Open-Loop Open-Loop Power Control Control Test .......... ......... . 72
Table 5-2 Test Specifications Specifications of PUSCH Open-Loop Power Control Control ................... ......... ................... ............... ...... 73 Table 5-3
Test Specifications Specifications of PUSCH PUSCH Closed-Loop Power Control........................ Control............... ................. ........ 76
Table 5-4 Test Specifications Specifications of PUCCH Open-Loop Power Control Control................... ......... ................... ............... ...... 79 Table 5-5 5-5
Test Specifications Specifications of of PUCCH PUCCH Closed-Loop Closed-Loop Power Power Control Control ................... ......... ................... ............ ... 82
Table 5-6
Test Specifications Specifications of SRS SRS Power Power Control Control.................. ........ ................... .................. ................... ................... ............ ... 84
Table 5-7
Test Specifications Specifications of PRACH Power Control .................. ......... ................... ................... .................. ............... ...... 87
Table 5-8 5-8
Test Specifications Specifications of of Downlink Downlink Power Power Allocation Allocation........ .................. ................... .................. ................... ............ 91
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VII
1 1.1
ZTE LTE FDD Power Control Feature Guide
Introduction Scope This document describes the power control technology applied to the eNodeB in an LTE network, including the basic theory, algorithm flows, performance enhancement, and application scenarios.
1.2
Target Group This document is intended for:
1.3
Personnel who need to understand FDD Power Control function
Personnel who work with ZTE products
Feature Attributes
For FDD single-mode eNodeB V3.20.50.20 series: OMMB version: V12.13.58 EMS version: V12.13.58
For GUL multi-mode eNodeB V4.13.15 series: OMMB version: V12.13.52 EMS version: V12.13.51
Note:
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1
ZTE LTE FDD Power Control Feature Guide
FDD single-mode V3.20.50.20 corresponds to GUL multi-mode V4.13.15, and LTE technology description and operation requirements in the corresponding versions are the same. Involved NEs: UE
√
eNodeB
√
MME -
S-GW -
BSC/RNC -
SGSN -
P-GW -
HSS -
Note: *-: Not involved *√: involved
1.4
Correlation with Other Features None.
2
2
Definition PBCH
Physical Broadcast Channel
PCFICH
Physical control format indicator channel
PDCCH
Physical Downlink Control Channel
PHICH
Physical hybrid-ARQ indicator channel
PRACH
Physical Random Access Channel
PSD
Power Spectral Density, transmitting power on an RB
PUCCH
Physical Uplink Control Channel
PUSCH
Physical Uplink Shared Channel
SINR
Signal to Interference plus Noise Ratio
SRS
Sounding Reference Signal
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TPC
3 3.1
Transmit Power Control
Technical Description Feature Description Uplink and downlink channels are described as follows: The following figures show the mapping relationships between transport channels and physical channels.
Figure 3-1 3-1
Mapping Between Uplink Transport Channels and Uplink Physical Channels
UL-SCH
RACH
Uplink Transport channels
PUSCH
PRACH
Uplink Physical channels channels
PUCCH
Figure 3-2
Mapping Between Downlink Transport Channels and Downlink Physical
Channels
BCH
MCH
PCH
DL-SCH
Downlink Transport channels
PBCH
PMCH
PDSCH
PDCCH
Downlink Physical channels channels
Power control is implemented on the PUSCH, PRACH, PUCCH, and SRS. Both the PUSCH and PUCCH support open-loop power control and closed-loop power control, while the PRACH supports only open-loop power control.
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ZTE LTE FDD Power Control Feature Guide
Downlink power control is a process of determining the transmit power of a downlink physical channel. The downlink physical channel transmit power per user is offset or adjusted based on the transmit power of the cell reference signal.
3.1.1
PUSCH Power Control The Physical Uplink Shared Channel (PUSCH) is primarily used to transmit service data. The purpose of PUSH power control is to determine the PUSCH transmit power. PUSCH power control includes open-loop power control and closed-loop power control. Open loop power control is determined by these OMC parameters: p0NominalPUSCH (UL Power Control), poNominalPUSCH1 (UL Power Control), p0UePusch1Pub (UL Power Control), alpha (UL Power Control), and downlink path loss of the UE. Where, p0NominalPUSCH (UL Power Control) and poNominalPUSCH1 (UL Power Control) represent the nominal power related to the cell, p0UePusch1Pub (UL Power Control) represents the power offset related to the UE for data transmission, and alpha (UL Power Control) represents a compensation factor for path loss. The size of PUSCH RBs that is allocated to a UE, downlink path loss of the UE, alpha alpha,, p0UePusch1Pub and poNominalPUSCH determine determine the PUSCH transmit power. Closed loop power control is used to adjust the transmit power at the UE side dynamically based on the open-loop transmit power through the TPC command. PUSCH transmit power affects cell-edge throughput and Quality of Service (QoS). When configuring an initial transmit power for PUSCH, the cell-edge coverage and cell-edge data rate requirements should be considered.
3.1.2
PUCCH Power Control The Physical Uplink Control Channel (PUCCH) is primarily used to transmit uplink control information. Different PUCCH formats require different transmit power. PUCCH power control includes open-loop power control and closed-loop power control. PUCCH transmit power is determined by these parameters: poNominalPUCCH (UL Power Control), p0UePucchPub Control), p0UePucchPub (UL Power Control), deltaFPucchFormat1 (UL Power Control), deltaFPucchFormat1b (UL Power Control), deltaFPucchFormat2 (UL Power Control), deltaFPucchFormat2a (UL Power Control), and deltaFPucchFormat2b (UL Power Control). Where, poNominalPUCCH (UL Power Control) represents the nominal power related to the cell, p0UePucchPub (UL Power Control) represents the power offset
4
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related to the UE for data transmission, and deltaFPucchFormat1 (UL Power Control), deltaFPucchFormat1b (UL Power Control), deltaFPucchFormat2 (UL Power Control), deltaFPucchFormat2a (UL Power Control), and deltaFPucchFormat2b (UL Power Control) represent the power offset corresponding to PUCCH format1a in different formats. Closed loop power control is used to adjust the transmit power at the UE side dynamically based on the open-loop transmit power through the Transmit Power Control (TPC) command.
3.1.3
SRS Power Control Sounding Reference Signal (SRS) power control includes open-loop power control and closed-loop power control. For SRS power control, some open-loop transmit power parameters on a single RB are the same as those of PUSCH, for example, poNominalPUSCH1 (UL Power Control), p0UePusch1Pub (UL Power Control), and alpha (UL Power Control). Unlike the transmit power of PUSCH, the transmit power of SRS is related to format offset, namely, powerOffsetOfSRS namely, powerOffsetOfSRS (UL Power Control). Both the closed-loop power control of SRS and that of PUSCH use the same closed-loop compensation value.
3.1.4
PRACH Power Control The methods such as open-loop power control and gradual power ramp-up are used in the random access flow. After the preamble signal is transmitted over a selected random access channel, the UE waits for random access response message. PRACH transmit power is determined by these OMC parameters: preambleIniReceivedPower (PRACH) and powerRampingStep (PRACH). Where, preambleIniReceivedPower represents the initial target received power for random access, and powerRampingStep (PRACH) represents the power ramp-up step.
3.1.5
Downlink Physical Channels or Signal Power Offsets Related to Cell Reference Signals The transmit power of downlink physical channels (such as PBCH, PDCCH, PCFICH, and PHICH), primary synchronization signal, or secondary synchronization signal) is determined by the cell reference signal and power compensation.
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3.1.6
Logical Downlink Channel Power Offsets Related to Cell Reference Signals The initial transmit power of PDSCH is determined by PA and PB.
3.2 3.2.1
Technical Description PUSCH Open-Loop Power Control PUSCH open-loop power control is primarily used to determine the transmit power of a PUSCH. According to 3GPP TS36.213, the transmit transm it power of a PUSCH on the UE side is defined as follows:
P PUSCH (i ) min{PCMAX ,10 log10 ( M PUSCH (i)) PO _ PUSCH ( j ) ( j ) PL TF (i ) f (i )} [ dBm] Where,
PO _ PU ( j ) and ( j ) are open-loop power control parameters, while TF (i) and PUSCH SCH
f (i) are closed-loop power control parameters.
P CMAX configuration
P CMAX represents the maximum transmit power of the UE, which is related to the UE capability level and the maximum allowable transmit power provided by higher layers.
M PUSCH (i)
M PUSCH (i) is the uplink RB number allocated to the UE.
6
PO_PUSCH,c ( j )
configuration
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PO_PUSCH,c ( j ) consists of PO _ NOMIN NOMINAL AL _ PUSCH PUSCH ( j ) and PO_UE_PUSCH,c ( j ) . The j parameter is provided by higher layers. When the the j parameter is set to 0, it represents semi-static authorized PUSCH transmission or retransmission. When the the j parameter is set to 1, it represents dynamic authorized PUSCH transmission or retransmission. When the j the j parameter is set to 2, it represents random-access-response authorized PUSCH transmission or retransmission.
When the j the j parameter is set to 0 or 1, PO _ NOMIN NOMINAL AL _ PUS PUSCH CH ( j ) is related to the throughput of an uplink edge UE.
For a single cell, the greater PO _ NOMIN NOMINAL AL _ PUS PUSCH CH ( j ) , the greater the uplink throughput and edge coverage are. However, if PO _ NOM NOMINA INAL L _ PU PUSCH SCH ( j ) is set to a too large value, inter-cell interference occurs. PO _ NOMIN NOMINAL AL _ PUS PUSCH CH ( j ) corresponds to p0NominalPUSCH (UL Power Control) and poNominalPUSCH1 and poNominalPUSCH1 (UL (UL Power Control) in the OMC. When the j the j parameter is set to 2:
PO_NOMINAL_PUSCH (2) P O_PRE PREA PREAMBLE MBLE _ Msg 3
Where, P represents the initial target received power for random access and 0 _ PRE PRE
PRE PREAM AMBLE BLE _ Msg 3 represents the power offset of Msg3 based on the PRACH message. They are signalled from higher layers and correspond to preambleIniReceivedPower (PrachFDD) and deltaPreambleMsg3 (UL Power Control) respectively in the OMC. It is recommended that P is set to -110 dBm and PRE PREAMB AMBLE LE _ Msg 3 is set to 0 dB. 0 _ PRE PRE
PO_UE_PUSCH,c ( j ) represents the power offset related to the UE for data transmission through the PUSCH, which corresponds to p0UePusch1Pub (UL Power Control) in the OMC.
( j )
configuration
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ZTE LTE FDD Power Control Feature Guide
( j ) is a compensation factor for path loss. loss.
0, 0.4 When the the j parameter is set to 0 or 1, 0.4, 0.5 0.5, 0.6 0.6, 0.7, 0.7, 0.8 0.8, 0.9 0.9, 1 .
( j ) 0.8 is recommended.
When the j the j parameter is set to 2, ( j ) 1 .
( j ) affects the throughputs of cell-center and cell-edge UEs.
( j ) corresponds
to alpha (UL Power Control) Control) in the OMC.
When ( j ) 1 , the transmit power of the UE is calculated as full path loss compensation.
When ( j ) 1 , the transmit power of the UE is calculated as partial path loss compensation.
Path loss is calculated by the UE according to the transmit power of the reference signal and the received RSRP as below: PL = referenceSignalPower – higher layer filtered RSRP Where, referenceSignalPower is provided by higher layers. This path loss means the Where, downlink path loss.
3.2.2
PUSCH Closed-Loop Power Control According to 3GPP TS36.213, the transmit transm it power of a PUSCH on the UE sid side e is defined as follows:
P PUSCH (i ) min{PCMAX ,10 log10 ( M PUSCH (i)) PO _ PUSCH ( j ) ( j ) PL TF (i ) f (i )} [ dBm]
H ( j ) and ( j ) are open-loop power control parameters while TF (i) Where, PO _ PUSC PUSCH and f (i) are closed-loop power control parameters. Closed-loop power control parameters are explained as follows:
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1.
TF (i) is used to alleviate the effect of the modulation and code rate on the
uplink
physical MPRK S
TF (i ) 10 log10 ( (2
channel
power
offset .
When
Ks=1.25,
PUSCH
1) offset ) . For details about how to calculate these
parameters, refer to 3GPP TS36.213. When Ks=0, TF (i) 0 . Where, Ks is given by the parameter deltaMCS-Enable deltaMCS-Enable,, which is used to make up the uplink physical channel power offset for adjusting the code rate. It is recommended that Ks is set to 0.
2.
The current sub-frame PUSCH power adjustment value is equal to f (i) , which is updated according to the TPC command. The Accumulation-enabled parameter (accumulation or absolute type) indicates the adjustment type of closed-loop power control f (i) . It is provided by the RRM layer and corresponds to to puschPCAdjType puschPCAdjType (UL Power Control) in the OMC. It is recommended that the Accumulation-enabled the Accumulation-enabled parameter is set to Disabled.
When Accumulation-enabled is set to Enabled, the corresponding closed-loop power When adjustment mode is accumulation, which means that the base station uses a relative value to instruct the UE to make further adjustment on the basis of the previous transmit power. f (i) is updated in the following following way according to the TPC command: tt
f (i) f (i 1) PUSCH (i K PUSCH )
PUSCH (i K PUSCH ) is a UE-level parameter, which corresponds to PDCCH TPC in DCI0 and DCI3/3A. The corresponding PDCCH sub-frame is 4. i K PUSCH . f (0) is the initial accumulated accumulated value. value. For FDD, K PUSCH
PUSCH (dB) corresponds to TPC in DCI0 and DCI3/3A. Refer to The principle of
absolute power control is to reduce redundant PUSCH transmit power. When some redundant power is left after the channel quality of the UE is mapped to the highest-order MCS, reducing the transmit power of the UE should be considered. To reduce the transmit power of the UE, a TPC command is generated based on
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ZTE LTE FDD Power Control Feature Guide
the difference between the target SINR of the UE and the measured m easured SINR of the UE. In principle, the SINR of the UE should be approximated to the target SINR.
If the UE reaches the maximum transmit power, the positive value of TPC becomes ineffective.
If the UE reaches the minimum transmit transmit power, the negative value of TPC becomes ineffective.
The UE should reset the accumulation value in the following scenarios:
The TPC command of absolute absolute power power modification value is received. received.
The
The random access response is received by the UE.
P O_UE_PUSCH
signaling is received. received.
The principle for accumulation closed-loop power control is as follows: For closed-loop power control, the base station adjusts the closed-loop power adjustment value ( f (i) ) by sending the TPC command to the UE. The current Power Spectrum Density (PSD) of the UE is adjusted dynamically based on f (i) for the purpose of approximating the current PSD of the UE to the target PSD. The adjustment principles for accumulation closed-loop power control are described as follows: 1.
When the difference between the target PSD and the current PSD of the UE is greater than 0, the base station sends a positive TPC command to the UE.
2.
When the difference between the target PSD and the current PSD of the UE is smaller than 0, the base station sends a negative TPC command to the UE.
The principle for setting a target PSD is as follows: The objective of configuring a target PSD is to maintain an optimal uplink system performance level. The target PSD is calculated based on the target SINR, NI, an and d uplink path loss of the UE.
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PSDTarget
SINRTarget NI
PL
The actual PSD of the UE can be calculated as follows:
PSDTX min{PCMAX , PO_PUSCH ( j ) ( j ) PL TF (i ) f (i )} A target SINR is conf configured igured based on the average uplink bit rate, r ate, UE power efficiency, inter-cell interference cancellation, and other factors. A too high target SINR increases the average UE bit rate but causes unnecessary power waste and interference to adjacent cells. A too low target SINR decreases the average UE bit rate. The objective of closed-loop power control is to ensure a high SINR and meanwhile reduce interference to adjacent cells. The initial value of a target SINR is configured based on the downlink path loss of the UE. The base station can obtain the location information of the UE through the Reference Signal Received Power (RSRP) and the PHR. In addition, the base station can adjust the target SINR dynamically according to the interference to adjacent cells. When Accumulation-enabled is set to Disabled (indicating absolute closed-loop power control), the base station controls the UE transmit power through the absolute value instruction. f (i) is updated in the following following way according to the TPC command: f (i ) PUSCH (i K PUSCH )
PUSCH (i K PUSCH ) is determined by the TPC sent from DCI0 based on the i K PUSCH .
For FDD, K PUSCH =4 .
PUSCH (dB) corresponds to TPC in DCI0.,Refer to The to The principle of absolute power
control is to reduce redundant PUSCH transmit power. When some redundant power is left after the channel quality of the UE is mapped to the highest-order MCS, reducing the transmit power of the UE should be considered. To reduce the transmit transm it power of the UE, a TPC command is generated based on the difference between
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ZTE LTE FDD Power Control Feature Guide
the target SINR of the UE and the measured SINR of the UE. In principle, the SINR of the UE should be approximated to the target SINR.
.
When the DCI0 of the sub-frame is not detected and runs in DRX mode, and no uplink sub-frame is available for TDD: f (i ) f (i 1)
The principle of absolute power control is to reduce redundant PUSCH transmit power. When some redundant power is left after the channel quality of the UE is mapped to the highest-order MCS, reducing the transmit power of the UE should be considered. To reduce the transmit power of the UE, a TPC command is generated based on the difference between the target SINR of the UE and the measured SINR of the UE. In principle, the SINR of the UE should be approximated to the target SINR.
Table 3-1
Mapping of TPC Command Field in DCI format 0/3 to absolute and
accumulated PUSCH values TPC Command Field in
Accumulated
Absolute PUSCH [dB] only DCI
DCI format 0/3
PUSCH [dB]
format 0
0
-1 -1
-4 -4
1
0
-1 -1
2
1
1
3
3
4
Closed-loop power control supports adaptive switching between the accumulative mode and absolute mode. The adaptive scheme determines the TPC mode of a terminal based on the terminal location, power adjustment value, and measurement precision. The adjustment principle for closed-loop power control in adaptive mode is: The corresponding TPC command is generated based on the difference between the actual PSD and the PSD of the target SINR. The principle for setting a target SINR is to ensure that the UE uses a low transmit power to reach the target MCS, on the basis of suppressing interference to adjacent cells caused by unnecessary power waste and preventing a decrease in the average UE bit rate caused by a too low SINR.
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In closed-loop power control based on the OI, cell 1 sends the overload indicator to its adjacent cell (cell 2) through the X2 interface when some frequency bands are interfered with severely. Cell 2 receives the OI and adjusts the UE transmit power in cell 2 in accordance with the OI level. In this way, the interference of these frequency bands in cell 1 is reduced. After closed-loop power control is enabled, the adjustment value of the UE-level OI is generated. The TPC command is then generated based on the OI adjustment value. The OI adjustment value of the UE is calculated based on the probability of high interference of in the adjacent cell, the interference level of the adjacent cell received by the local cell, and the GBR satisfaction of the UE.
3.2.3
PUCCH Open-Loop Power Control On the UE side, the PUCCH transmit power is calculated as follows:
PPUCCH i min PCMAX , P 0_PUCCH PL h nCQI , nHARQ F_ PUCCH F g i [dBm]
Where, P O _ PUCCH h nCQI , nHARQ , and F_PUCCH ( F ) are open-loop power control PUCCH , parameters and g i is a closed-loop closed-loop power control parameter.
These parameters are described as follows:
P CMAX represents the maximum transmit power of the UE, which is related to the UE capability level and the maximum allowable transmit power configured by higher layers.
P O_PUCCH consists of P O_NOMINAL_ PUCCH and P O_UE_PUCCH , which are configured by the RRM layer and correspond to poNominalPUCCH (UL Power Control) and p0UePucchPub (UL Power Control) in the OMC. It is recommended that
P O_NOMINAL_ PUCCH is set to -105 dBm and P O_UE_PUCCH is set to 1 Db. Db.
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ZTE LTE FDD Power Control Feature Guide
F_PUCCH ( F )
is
configured
by
higher
layers.
Each
F_PUCCH ( F )
value
corresponding to a PUCCH format is a power offset relative to PUCCH format 1a. 1a. The following power offsets need to be configured in the OMC:
deltaFPucchFormat1 (UL Power Control)
deltaFPucchFormat1b (UL Power Control)
deltaFPucchFormat2 (UL Power Control)
deltaFPucchFormat2a (UL Power Control)
deltaFPucchFormat2b (UL Power Control) Control)
h(nCQI , n HAR HARQ Q ) is a PUCCH format dependent value. nCQI corresponds to the number of information bits for the channel quality information. n HAR number mber HARQ Q is the nu of HARQ-ACK bits .
3.2.4
PUCCH Closed-Loop Power Control On the UE side, the PUCCH power control equation is defined as below:
PPUCCH i min PCMAX , P 0_PUCCH PL h nCQI , nHARQ F_ PUCCH F g i [dBm]
PUCCH Where, P O _ PUCCH , h nCQI , nHARQ , and
F_PUCCH ( F )
are open-loop power control
parameters and g i is a closed-loop power control parameters.
These parameters are described as below:
PUCCH is a UE-level power correction parameter, which corresponds to a TPC command contained in DCI1A/1B/1D/1/2A/2/3. CRC corresponds to C-RNTI or TPC-PUCCH-RNTI.
For
the
mapping
relationship
between
PUCCH and
DCI1A/1B/1D/1/2A/2/3, refer to It to It should be noted that a target Ps is not a value but
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a scale, in order to avoid fluctuation in the transmit power of the PUCCH. To determine the scale of a target Ps, the inter-symbol interference of the PRB and the interference of adjacent cells should be considered. It is inappropriate to blindly increase the transmit power to reduce the DTX of the PUCCH. The DTX of the PUCCH is not only related to the power control of the PUCCH, but also related to downlink performance. Blindly increasing the transmit power will increase the power between UEs. Therefore, the configuration principle is to set a target Ps to a tradeoff value on the premise of ensuring demodulation performance.
.
Table 3-2 Mapping of TPC Command Field in DCI DCI format 1A/1/2A/2/3 to PUCCH values
TPC Command Field in DCI format 1A/1/2A/2/3
PUCCH [dB]
0
-1
1
0
2
1
3
3
When the TPC command is successfully transmitted, g(i) is updated based on the TPC command. M 1
g (i ) g (i 1) PUCCH (i k m ) m 0
Where,
g (i) is the transmit power adjustment value of the current frame on the
PUCCH.
4. For FDD, M 1 and k 0
If the UE reaches the maximum transmit power, power, the positive TPC becomes ineffective.
If the UE reaches the minimum transmit power, the negative TPC becomes ineffective.
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ZTE LTE FDD Power Control Feature Guide
g(i) is a UE-level power correction parameter for closed-loop power control. The code division technology is used for data transmission on the PUCCH. Multiple UEs use the same RB for data transmission on the PUCCH. For format1 series, the number of UEs that are multiplexed on the same RB is variable, and therefore the interference received by the PRB and the PUCCH quality will change considerably. The PUCCH uses the received power (Ps) for the purposes of power control and cell-edge coverage. The idea behind the closed-loop power control of the PUCCH is as below: The base station maintains the target Ps and measures the current Ps. Depending on the difference between the measured Ps and the target Ps, the base station generates a TPC command, which is sent in DCI 1A/1/2A/2/3. The UE adjusts the transmit power of the PUCCH according to the TPC command to ensure that the Ps of the UE can quickly approximate to the target Ps. The adjustment principles are described as follows:
When the difference between between the target Ps and the measured Ps is greater than 0, the base station sends a positive TPC command to the UE.
When the difference between between the target Ps and the measured Ps is smaller than 0, the base station sends a negative TPC command to the UE.
It should be noted that a target Ps is not a value but a scale, in order to avoid fluctuation in the transmit power of the PUCCH. To determine the scale of a target Ps, the inter-symbol interference of the PRB and the interference of adjacent cells should be considered. It is inappropriate to blindly increase the transmit power to reduce the DTX of the PUCCH. The DTX of the PUCCH is not only related to the power control of the PUCCH, but also related to downlink performance. Blindly increasing the transmit power will increase the power between UEs. Therefore, the configuration principle is to set a target Ps to a tradeoff value on the premise of ensuring demodulation performance.
3.2.5
SRS Power Control The power ( P SRS ) for the UE to send a sounding reference signal on sub-frame i is defined as follows:
PSRS (i ) min{PCMAX , PSRS _ OFFSET 10 log10 ( M SRS ) PO _ PUS CH ( j ) ( j ) PL f (i)} [ dBm]
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P CMAX represents the maximum transmit transmit power of th the e UE.
P SRS_OFFSET is a UE-level semi-static parameter configured by higher layers. It is used to improve the accuracy for estimating the channel quality of the UE. This parameter corresponds to powerOffsetOfSRS to powerOffsetOfSRS (UL (UL Power Control) Control) in the OMC. The recommended value is -3 dB.
M SRS represents the number of resource blocks in the SRS transmission
bandwidth on sub-frame i.
3.2.6
f (i ) represents the current PUSCH power control adjustment value.
For details about P O_PUSCH( j ) and ( j ) , refer to section 4.1 ( j 1).
PRACH Open-Loop Power Control On the UE side, the transmit transm it power of the PRACH is d defined efined as follows:
P PREAMBLE_M sg 3 P rampup dBm PRACH min P CMAX PL P O_PRE
，
P O_PRE represents the initial target received power for random access. It is an open-loop
power
control
parameter,
which
corresponds
to
preambleIniReceivedPower (PRACH) (PRACH) in the OMC.
is a power offset parameter of Msg3 as compared with that of PREAMBLE _ Msg Msg 3 random access.
P rampup is calculated based on the preamble power ramp-up step and the number
of random transmission attempts. It is equal to the total power ramp-up ffrom rom the first preamble to the last preamble.
Prampup ( N PRE 1) * dP rampup
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ZTE LTE FDD Power Control Feature Guide
N PRE represents the number of preamble transmission attempts of the UE.
d P rampup
represents the power ramp-up step configured by higher layers, which
corresponds to powerRampingStep (PRACH) (PRACH) in the OMC. The recommended value is 2 dB.
messagePowerOffsetGroupB configured
in
the
OMC,
represents is
related
redundant to
the
power,
cell,
and
which
can
corresponds
be to
messagePowerOffsetGroupB (PRACH) (PRACH) in the OMC. The recommended value is 8 dB.
Figure 3-3
UE PRACH power ramp up process
Transmit power satisfying the target received power
Adjustment/ Correctness
UE
eNB
RACH preamble
x
RACH preamble x
+ ΔdPrampup ……
RACH preamble x
(Npre-1)* ΔdPrampup
3.2.7
Configuring the Transmit Power of a Downlink Physical Channel, Signal, or Logical Channel For the downlink power configuration, the maximum transmit power is configured based on the transmission capability of the base station and the actual transmit power is configured based on the cell coverage requirements. The transmit power of a downlink physical channel, signal, or logical channel is represented by RE. The cell reference signal power is absolute power, which is configured to ensure the cell coverage and the
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minimum power. The transmit power of a downlink physical channel, signal, or logical channel is based on the transmit power of the cell reference signal. The power compensation of a downlink physical channel, signal, or logical channel is configured in the OMC and related to the cell reference signal.
3.2.8
Downlink Physical Channel, Signal, or Power Offset The transmit power of a downlink physical channel (such as PBCH, PDCCH, PCFICH, and PHICH), primary synchronization signal, or secondary synchronization signal is determined by the cell reference signal and power offset. The power offset of the PDCCH is represented by multiple one-dimensional data. Each element is related to PDCCH format 0/1/2/3.
3.2.9
Power Offset of a Downlink Logical Channel Multiple logical channels are mapped to the PDSCH, and therefore these logical channels need to be configured with different power offset values based on the cell reference signal. For example, the DTCH is configured with the PA based on the UE services. In addition, Msg2 is carried by the PDSCH, and therefore the corresponding PA must be configured. The corresponding OMC parameters include paForBCCH (DL Power Control), paForCCCH (DL Power Control), paForPCCH (DL Power Control), paForMSG2 (DL Power Control), paForDCCH Control), paForDCCH (DL Power Control), and paForDTCH and paForDTCH (DL Power Control).
4
Key Parameters and Configuration
4.1
PUSCH Open-Loop Power Control
4.1.1
Parameters List
Table 4-1
Parameters List
SN
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Parameter Name
Figure
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ZTE LTE FDD Power Control Feature Guide
1 2
3 4 5
4.1.2
Switch for PUSCH Closed-Loop Power Control
Figure 4-1
Cell Nominal Power Required for Data Transmission in PUSCH Semi-Static
Figure 4-2
Scheduling Authorization Mode Cell Nominal Power Required for Data Transmission in PUSCH Dynamic
Figure 4-2
Scheduling Authorization Mode Path Loss Compensation Factor for PUSCH Transmission Power
Figure 4-2
PUSCH Power Offset of UE in Dynamic Schedule or Semi-Static
Figure 4-3
Scheduling
Parameter Configuration Rule
Table 4-2 S
Configuration rule of parameters
MO Nam
N
Short Name
Description
e UL
Contr
for
CH
Loop Power Control
Range
Value
-BPL0:
LPCofPUS
Closed-
Default
Normal-FDD
Switch
PUSCH
Value
switchForC
Power
ol 1
Name
Close, The parameter indicates the cell whether enable
0:Close,1:
close-loop power control
Open
of PUSCH or not.
Normal-BPL 1:Open, AirLine: Close, HighWay: Close
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UL
Cell
p0Nominal
Power
Nominal
PUSCH
Contr
Power
ol
Require
The parameter indicates the cell specific nominal
d for
power for PUSCH (re)transmissions
Data Transmi
corresponding to a
ssion in
2
semi-persistent grant.
PUSCH
The parameter is used to
Semi-St
[-126,24] unit dBm
-75dBm
calculate the transmit
atic
power of PUSCH, and
Schedul
embodys the power
ing
difference among cells.
Authoriz ation Mode UL
Cell
poNominal
Power
Nominal
PUSCH1
Contr
Power
The parameter indicates
ol
Require
the cell specific nominal
d for
power for PUSCH
Data
(re)transmissions
Transmi
corresponding to a
ssion in
dynamic scheduled
[-126,24]
PUSCH
grant. The parameter is
unit dBm
Dynami
used to calculate the
c
transmit power of
Schedul
PUSCH, and embody
ing
the power difference
Authoriz
among cells.
3
-75
ation Mode
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ZTE LTE FDD Power Control Feature Guide
UL Power Contr ol
Path
alpha
calculate the transmit
Loss
power of PUSCH and is
Compen sation Factor for
4
The parameter is used to
PUSCH Transmi
used to compensate the
0:0,1:0.4,
cell pathloss
2:0.5,3:0.
Normal:0.8,
corresponding to a
6,4:0.7,5:
AirLine:1,
semi-persistent grant
0.8,6:0.9,
HighWay:0.8
and a dynamic
7:1.0
scheduled grant. The
ssion
parameter is a cell
Power
specific parameter.
UL
PUSCH
p0UePusc
Power
Power
h1Pub
Contr
Offset of
UE specific component
ol
UE in
for PUSCH
Dynami
(re)transmissions
c
corresponding to a
[-8,7] unit
Schedul
dynamic scheduled grant
dB
e or
or semi-staticscheduled semi-staticscheduled
Semi-St
grant(common initial
atic
value)
5
1
Schedul ing
4.1.3
Configuration Description
4.1.3.1
Function Activation To activate the PUSCH open loop power control, in the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control . Click the
button, set the S wi witch tch for P US C H
Closed-Loop Power Control parameter to Close[0] Close[0],, as shown in Figure 4-1. Click the button.
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Figure 4-1
4.1.3.2
Configuring to active PUSCH Open-Loop Power Control
Configuring Other Relevant Relevant Parameters To test if the parameters of PUSCH Open-Loop power control can be normally delivered as configured in the network management system, in the Configuration Managemen Managementt window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN
FDD Cell > UL Power Control . Click the shown in Figure 4-2 and Figure and Figure 4-3. 4-3. Click the
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button, configure the parameters as button.
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ZTE LTE FDD Power Control Feature Guide
24
Figure 4-2
Configuring the parameters of PUSCH Open-Loop power control
Figure 4-3
Configuring the parameter of PUSCH Power Offset
ZTE Confidential & Proprietary
4.1.3.3
ZTE LTE FDD Power Control Feature Guide
Function Deactivation To deactivate the PUSCH open loop power control, in the Configuration Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Click the
button, set the Switch for PUSCH Closed-Loop Power Control
parameter to Open[1], as shown in Figure in Figure 4-4. 4-4. Click the
button, and then synchronize the
data to the eNodeB.
Figure 4-4
4.1.3.4
Configuring to deactivate PUSCH Open-Loop Power Control
Data Synchronization Select [Configuration Management->Data Synchronization] from the main menu of the Configuration Management tab. The Data Synchronization dialog box opens. First select NE, then select synchronization mode as Incremental synchronization, last click Synchronize button.
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ZTE LTE FDD Power Control Feature Guide
4.2 4.2.1
PUSCH Closed-Loop Power Control Parameters List
Table 4-3
Parameters List
SN
Parameters Name
Figure
1
Switch for PUSCH Closed-Loop Power Control
Figure 4-5
2
Power Control Adjust Accumulation Enabled
Figure 4-6
3
Downlink Period RSRP Measurement Switch
Figure 4-6
4
PUSCH Indicated By PDCCH DCI 3/3A Valid or Not
Figure 4-9
Power Control Step Range for PDCCH DCI 3/3A Indicated PUSCH TPC
Figure 4-9
5
Command
Figure 4-7
Cell Nominal Power Required for Data Transmission in PUSCH Semi-Static 6
7 8 9
4.2.2
Scheduling Authorization Mode
Figure 4-7
Cell Nominal Power Required for Data Transmission in PUSCH Dynamic Scheduling Authorization Mode Path Loss Compensation Factor for PUSCH Transmission Power
Figure 4-7
PUSCH Power Offset of UE in Dynamic Schedule or Semi-Static
Figure 4-8
Scheduling
Parameter Configuration Rule
Table 4-4
Configuration rule of parameters
S
MO
N
Name
Name
Control
Switch for PUSCH
1
Description
Value
Default
Range
Value Normal-FDD
switchForCLPC
UL Power
Short Name
Closed-L oop Power Control
ofPUSCH
The parameter
-BPL0:Close,
indicates the cell
Normal-BPL
whether enable
enum(Clo
1:Open,
close-loop
se,Open)
AirLine:Clos
power control of
e,
PUSCH or not.
HighWay:Clo se
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2
UL
Power
puschPCAdjTyp
Power
Control
e
Control
Adjust Accumul ation Enabled
3
The parameter
0:Current
indicates the
Absolute,
power control
1:Accumu
adjust type for
lation,2:A
PUSCH.
dapter
UL
Downlink
rsrpPeriodMeas
Control switch of
Power
Period
SwitchDl
period RSRP
Control
RSRP
measure switch
0:Close,1:
Measure
can determine
Open
ment
which are
Switch
enabled or not.
UL
PUSCH
switchForDCI3A
Power
Indicated
3Pusch
Control
By
4
PDCCH
DCI3A3 Switch
0:No,1:Ye
for PUSCH
s
Current absolute[0]
Close[0]
No[0]
DCI 3/3A Valid or Not
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ZTE LTE FDD Power Control Feature Guide
UL
dCI3A3SelPusc
0: Format
Power
h
3A Power
Control
Control Adjust Step[-1,1],
5
Power
When the Power
1: Format
Control
control Adjust
3 Power
Step
type for PUSCH
Control
Range
is accumulation,
Adjust
Format 3
for
the parameter is
Step[-1,0,
Power
PDCCH
used to select
1,3],
Control
DCI 3/3A
the range of
2: Format
Adjust
Indicated
TPC command
3A Power
Step[-1,0,1,3
PUSCH
step size of
Control
][1]
TPC
PUSCH for
Adjust
Comman
PDCCH DCI
Step[-1,1]
d
format 3/3A.
or Format 3 Power Control Adjust Step[-1,0, 1,3]
UL
p0NominalPUS
The parameter
Power
CH
indicates the cell
Control
6
Cell
specific nominal
Nominal
power for
Power
PUSCH
Required
(re)transmission
for Data Transmis
s corresponding to a
sion in
semi-persistent
PUSCH
grant. The
Semi-Sta
parameter is
tic
used to
Scheduli
calculate the
ng
transmit power
Authoriz
of PUSCH, and
ation
embodys the
Mode
power
[-126,24] unit dBm
-75.
difference among cells.
28
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
UL
poNominalPUS
The parameter
Power
CH1
indicates the cell
Control
specific nominal
Cell
power for
Nominal
PUSCH
Power Required
(re)transmission s corresponding
for Data
to a dynamic
Transmis
scheduled
sion in
7
grant. The
PUSCH
parameter is
Dynamic
[-126,24] unit dBm
-75
used to
Scheduli
calculate the
ng
transmit power
Authoriz
of PUSCH, and
ation
embody the
Mode
power difference among cells. alpha
UL
The parameter
Power
is used to
Control
calculate the transmit power
8
Path
of PUSCH and
Loss
is used to
Compen
compensate the
sation
cell pathloss
Factor
corresponding
for
to a
PUSCH
semi-persistent
Transmis
grant and a
sion
dynamic
Power
scheduled
0:0,1:0.4, 2:0.5,3:0.
Normal:0.8,
6,4:0.7,5:
AirLine:1,
0.8,6:0.9,
HighWay:0.8
7:1.0
grant. The parameter is a cell specific parameter.
ZTE Confidential & Proprietary
29
ZTE LTE FDD Power Control Feature Guide
UL Power Control
PUSCH Power
p0UePusch1Pu
UE specific
b
component for
Offset of UE in Dynamic Schedul
9
e or Semi-Sta tic Scheduli ng
4.2.3
Configuration Description
4.2.3.1
Function Activation
PUSCH (re)transmission s corresponding to a dynamic
[-8,7] unit
scheduled grant
dB
1
or semi-staticsche duled grant(common initial value)
To activate the PUSCH open loop power control, in the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control . Click the
button, set the S wi witch tch for P US C H
Open[1],, as shown in Figure in Figure 4-5. 4-5. Click Click the Closed-Loop Power Control parameter to Open[1] button.
30
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
Figure 4-5
4.2.3.2
Configuring to active PUSCH Close-Loop Power Control
Configuring Other Relevant Relevant Parameters 1.
To test different PUSCH closed loop power control types, in the Configuration Management window Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button, set the
PUSCH power control adjustment type parameter. When the PUSCH power
control adjus tment tment type parameter is set to Accumulation[1] Accumulation[1],, set the DownLink Open[1] (otherwise, (otherwise, retain its default period peri od R S R P meas meas ur ure e s witch wi tch parameter to Open[1] value) , as shown in Figure 4-6. Click the
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button.
31
ZTE LTE FDD Power Control Feature Guide
Figure 4-6
2.
Configuring PUSCH closed loop power control types
To test if the parameters of PUSCH Close-Loop power control can be normally delivered as configured in the network management system, in the Configuration Management window Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control . Click the the parameters as shown in Figure 4-7 and Figure 4-8. Click the
32
button, configure button.
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
Figure 4-7
Configuring the parameters of PUSCH Open-Loop power control
ZTE Confidential & Proprietary
33
ZTE LTE FDD Power Control Feature Guide
Figure 4-8
3.
Configuring the Parameter of PUSCH Power Offset
To test if DCI3/3A can deliver a TPC, in the Configuration Management window Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control . Click the
button, set the PUSCH indicated by
to Yes[1],, as shown in Figure 4-9. Click PD C CH DC I 3/3A 3/3A val valid id or not parameter to Yes[1] the
34
button.
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
Figure 4-9
4.2.3.3
Configuring DCI3/3A Parameters
Function Deactivation To deactivate the PUSCH open loop power control, in the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button, set the S wi witch tch for P US C H
Close[0],, as shown in Figure 4-10. Click the C los los ed-Loop ed-Loop Power Control parameter to Close[0] button, and then synchronize the data to eNodeB.
ZTE Confidential & Proprietary
35
ZTE LTE FDD Power Control Feature Guide
Figure 4-10
4.2.3.4
Configuring to deactivate PUSCH Close-Loop Power Control
Data Synchronization Select [Configuration Management->Data Synchronization] from the main menu of the Configuration Management tab. The Data Synchronization dialog box opens. First select NE, then select synchronization mode as Incremental synchronization, last click Synchronize button.
4.3 4.3.1
PUCCH Open-Loop Power Control Parameters List
Table 4-5 SN
36
Parameters List Parameters Name
Figure
1
Switch for PUCCH Closed-Loop Power Control
Figure 4-11
2
Related Nominal Power Used By PUCCH Physical Channel
Figure 4-12
3
Physical Channel Power Compensation for PUCCH Format 1
Figure 4-12
ZTE Confidential & Proprietary
4.3.2
ZTE LTE FDD Power Control Feature Guide
4
Physical Channel Power Compensation for PUCCH Format 1b
Figure 4-12
5
Physical Channel Power Compensation for PUCCH Format 2
Figure 4-12
6
Physical Channel Power Compensation for PUCCH Format 2a
Figure 4-12
7
Physical Channel Power Compensation for PUCCH Format 2b
Figure 4-12
8
PUCCH Power Offset of UE
Figure 4-13
Parameter Configuration Rule
Table 4-6 S
Configuration rule of parameters
MO Name
Short Name Name
N UL Power Control
Switch for
Description
PUCCH
Closed-Loo p Power
ult Value
indicates the cell whether enable
0:Close,1:
close-loop power
Open
Open
control of
Control
PUCCH or not.
UL Power
poNominalPUCC
The parameter
Control
H
indicates the cell specific nominal
Related
power for
Nominal
PUCCH. And it is
Power Used By
2
Range
Defa
switchForCLPCof The parameter
PUCCH 1
Value
PUCCH
used to calculate
[-127,-96]
-105d
the transmit
unit dbm
Bm
power for PUCCH and
Physical Channel
embodys the power difference among cells.
UL Power
Physical
deltaFPucchFor The parameter
Control
Channel
mat1
3
ZTE Confidential & Proprietary
indicates the
Power
power offset for
Compensat
different PUCCH
ion for
Format 1 with
PUCCH
PUCCH Format
Format 1
1a.
0:-2,1:0,2: 2
2[2]
37
ZTE LTE FDD Power Control Feature Guide
UL Power
Physical
deltaFPucchFor The parameter
Control
Channel
mat1b
4
Power
power offset for
Compensat
different PUCCH
ion for
Format 1b with
PUCCH
PUCCH Format
Format 1b
1a.
UL Power
Physical
deltaFPucchFor The parameter
Control
Channel
mat2
5
Power
power offset for
Compensat
different PUCCH
ion for
Format 2 with
PUCCH
PUCCH Format
Format 2
1a.
Physical
deltaFPucchFor The parameter
Control
Channel
mat2a
Power Compensat
power offset for different PUCCH
ion for
Format 2a with
PUCCH
PUCCH Format
Format 2a
1a.
Physical
deltaFPucchFor The parameter
Control
Channel
mat2b
power offset for
Compensat
different PUCCH
ion for
Format 2b with
PUCCH
PUCCH Format
Format 2b
1a. p0UePucchPub
0:-2,1:0,2: 1,3:2
1[2]
0:-2,1:0,2: 2
2[2]
indicates the
Power
UL Power
3[1]
indicates the
UL Power
7
0:1,1:3,2:5
indicates the
UL Power
6
0:-2,1:0,2: 2
2[2]
UE specific component for
Control PUCCH 8
indicates the
Power Offset of UE
PUSCH (re)transmissions corresponding to a dynamic
[-8,7] unit dB
1dB
scheduled grant(common initial value)
38
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
4.3.3
Configuration Description
4.3.3.1
Function Activation
To activate the PUCCH open loop power control, in the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button, set the S wi witch tch for P UC C H
Close[0],, as shown in Figure 4-11. Click the C los los ed-Loop ed-Loop Power Control parameter to Close[0] button.
Figure 4-11
4.3.3.2
Configuring to active PUCCH Open-Loop P Power ower Control
Configuring Other Relevant Relevant Parameters To test if the parameters of PUCCH Open-Loop power control can be normally delivered as configured in the network management system, in the Configuration Managemen Managementt window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN
FDD Cell > UL Power Control . Click the shown in Figure 4-12 and Figure 4-13. Click the
ZTE Confidential & Proprietary
button, configure the parameters as button.
39
ZTE LTE FDD Power Control Feature Guide
Figure 4-12
40
Configuring the Parameters of PUCCH Open-Loop Power Control
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
Figure 4-13
4.3.3.3
Configuring the Parameter of PUCCH Power Offset of UE
Function Deactivation To deactivate the PUCCH open loop power control, in the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button, set the S wi witch tch for P UC C H
Open[1],, as shown in Figure 4-14. Click the C los los ed-Loop ed-Loop Power Control parameter to Open[1] button, and then synchronize the data to eNodeB.
ZTE Confidential & Proprietary
41
ZTE LTE FDD Power Control Feature Guide
Figure 4-14
4.3.3.4
Configuring to deactivate PUCCH Open-Loop Power Control
Data Synchronization Select [Configuration Management->Data Synchronization] from the main menu of the Configuration Management tab. The Data Synchronization dialog box opens. First select NE, then select synchronization mode as Incremental synchronization, last click Synchronize button.
4.4 4.4.1
PUCCH Close-Loop Power Control Parameters List
Table 4-7 SN
42
Parameters List Parameters Name
Figure
1
Switch for PUCCH Closed-Loop Power Control
Figure 4-15
2
PUCCH Indicated By PDCCH DCI 3/3A Valid or Not
Figure 4-18
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
3
4.4.2
Power Control Step Range for PDCCH DCI 3/3A Indicated PUCCH TPC
Figure 4-18
Command
4
Related Nominal Power Used By PUCCH Physical Channel
Figure 4-16
5
Physical Channel Power Compensation for PUCCH Format 1
Figure 4-16
6
Physical Channel Power Compensation for PUCCH Format 1b
Figure 4-16
7
Physical Channel Power Compensation for PUCCH Format 2
Figure 4-16
8
Physical Channel Power Compensation for PUCCH Format 2a
Figure 4-16
9
Physical Channel Power Compensation for PUCCH Format 2b
Figure 4-16
10
PUCCH Power Offset of UE
Figure 4-17
Parameter Configuration Rule
Table 4-8
Configuration rule of parameters
S
MO
N
Name
Name
Short
Description
Name
UL Power
Switch for
switchForCL
The parameter
Control
PUCCH
PCofPUCCH
indicates the cell
1
Defaul
Range
t Value
Closed-L
whether enable
0:Close,1:
oop
close-loop power
Open
Power
control of PUCCH or
Control
not.
UL Power
PUCCH
switchForDCI
Control
Indicated
3A3Pucch
By 2
Value
PDCCH DCI 3/3A
Open[1]
Switch for DCI3A or DCI3 for PUCCH
0:No,1:Yes
No[0]
Valid or Not
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ZTE LTE FDD Power Control Feature Guide
UL Power
dCI3A3SelPu
0: Format
Control
sch
3A Power Control Adjust Step[-1,1], 1: Format
Power
3 Power
Control
Control
Step
The parameter is used Adjust
Range for PDCCH 3
DCI 3/3A Indicated PUCCH TPC
to select the range of
Step[-1,0,1
TPC command step
,3],
size of PUCCH for
2: Format
PDCCH DCI format
3A Power
3/3a.
Control
Format 3 Power Control Adjust Step[-1, 0,1,3][1]
Adjust
Comman
Step[-1,1]
d
or Format 3 Power Control Adjust Step[-1,0,1 ,3] UL Power Control
Related
poNominalP
The parameter
UCCH
indicates the cell specific nominal
Nominal
power for PUCCH.
Power Used By
4
PUCCH
And it is used to
[-127,-96]
-105dB
calculate the transmit
unit dbm
m
power for PUCCH and embodys the power
Physical Channel
difference among cells.
5
UL Power
Physical
deltaFPucc
Control
Channel
hFormat1
The parameter
Power
indicates the power
Compens
offset for different
ation for
PUCCH Format 1 with
PUCCH
PUCCH Format 1a.
0:-2,1:0,2: 2
2[2]
Format 1
44
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
UL Power
Physical
deltaFPucc
Control
Channel
hFormat1b
6
The parameter
Power
indicates the power
Compens
offset for different
ation for
PUCCH Format 1b
PUCCH
with PUCCH Format
Format
1a.
0:1,1:3,2:5
3[1]
1b UL Power
Physical
deltaFPucc
Control
Channel
hFormat2
7
The parameter
Power
indicates the power
Compens
offset for different
ation for
PUCCH Format 2 with
PUCCH
PUCCH Format 1a.
0:-2,1:0,2: 1,3:2
1[2]
Format 2 UL Power
Physical
deltaFPucc
Control
Channel Power
hFormat2a
8
The parameter indicates the power
Compens
offset for different
0:-2,1:0,2:
ation for
PUCCH Format 2a
2
PUCCH
with PUCCH Format
Format
1a.
2[2]
2a UL Power
Physical
deltaFPucc
Control
Channel
hFormat2b
9
The parameter
Power
indicates the power
Compens
offset for different
0:-2,1:0,2:
ation for
PUCCH Format 2b
2
PUCCH
with PUCCH Format
Format
1a.
2[2]
2b 10
UL Power
p0UePucchP
UE specific
Control
ub
component for
PUCCH
PUSCH
Power
(re)transmissions
[-8,7] unit
Offset of
corresponding to a
dB
UE
dynamic scheduled
1dB
grant(common initial value)
ZTE Confidential & Proprietary
45
ZTE LTE FDD Power Control Feature Guide
4.4.3
Configuration Description
4.4.3.1
Function Activation
To activate the PUCCH open loop power control, in the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button, set the S wi witch tch for P UC C H
Open[1],, as shown in Figure 4-15. Click the C los los ed-Loop ed-Loop Power Control parameter to Open[1] button.
Figure 4-15
4.4.3.2
Configuring to active PUCCH Close-Loop Power Control
Configuring Other Relevant Relevant Parameters 1.
To test if the parameters of PUCCH Close-Loop power control can be be no normally rmally delivered as configured in the network management system, in the Configuration Management window Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control . Click the the parameters as shown in Figure 4-16. Click the
46
button, configure
button.
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ZTE LTE FDD Power Control Feature Guide
Figure 4-16
Configuring the parameters of PUCCH Close-Loop power control
Figure 4-17
Configuring the Parameter of PUCCH Power Offset of UE
ZTE Confidential & Proprietary
47
ZTE LTE FDD Power Control Feature Guide
2.
To test if DCI3/3A can deliver a TPC, in the Configuration Management window Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button, set the PUSCH indicated by
PDCCH DCI 3/3A valid or not parameter parameter to Yes[1], as shown in Figure 4-18. Click the Figure 4-18
4.4.3.3
button. Configuring DCI3/3A Parameters
Function Deactivation To deactivate the PUCCH open loop power control, in the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button, set the S wi witch tch for P UC C H
Close[0],, as shown in Figure 4-19. Click the C los los ed-Loop ed-Loop Power Control parameter to Close[0] button, and then synchronize the data to eNodeB.
48
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
Figure 4-19
4.4.3.4
Configuring to deactivate PUCCH Close-Loop Power Control
Data Synchronization Select [Configuration Management->Data Synchronization] from the main menu of the Configuration Management tab. The Data Synchronization dialog box opens. First select NE, then select synchronization mode as Incremental synchronization, last click Synchronize button.
4.5
4.5.1
SRS Power Control Parameters List
Table 4-9
Parameters List
SN
Parameters Name
Figure
1
Switch for PUSCH Closed-Loop Power Control
Figure 4-20
2
Power Control Adjust Accumulation Enabled
Figure 4-21
3
Downlink Period RSRP Measurement Switch
Figure 4-21
ZTE Confidential & Proprietary
49
ZTE LTE FDD Power Control Feature Guide
4 5
6
PUSCH Indicated By PDCCH DCI 3/3A Valid or Not
Figure 4-25
Power Control Step Range for PDCCH DCI 3/3A Indicated PUSCH TPC
Figure 4-25
Command Cell Nominal Power Required for Data Transmission in PUSCH Dynamic
Figure 4-22
Scheduling Authorization Mod 7
Path Loss Compensation Factor for PUSCH Transmission Powe
Figure 4-22
8
Power Offset of SRS Relative to PUSCH
Figure 4-23
PUSCH Power Offset of UE in Dynamic Schedule or Semi-Static
Figure 4-24
9
4.5.2
Scheduling
Parameter Configuration Rule
Table 4-10
Configuration rule of parameters
S
MO
N
Name
Name
UL Power Control
Switch
Short Name
Value
Default
Range
Value
switchForC
Normal-F
LPCofPUC
DD-BPL0:
CH
for PUCCH Closed-L
1
Description
oop Power Control
The parameter
Close,
indicates the cell
Normal-B
whether enable
0:Close,1:Op
PL1:Open
close-loop power
en
,
control of PUSCH or
AirLine:Cl
not.
ose, HighWay: Close
2
UL
Power
puschPCA
Power
Control
djType
Control
The parameter
0:Current
Adjust
indicates the power
Absolute,1:A
Accumul
control adjust type for
ccumulation,
ation
PUSCH.
2:Adapter
Enabled
Current Absolute[ 0]
50
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
3
UL
Downlink
rsrpPeriod
Power
Period
MeasSwitc
Control
RSRP
hDl
Measure
period RSRP measure switch can determine which are
ment
0:Close,1:Op en
Close[0]
enabled or not.
Switch UL
PUSCH
switchForD
Power
Indicated
CI3A3Pusc
Control
By
h
PDCCH
4
Control switch of
DCI3A3 Switch for PUSCH
DCI 3/3A
0:No,1:Yes
No[0]
Valid or Not UL
dCI3A3Sel
0: Format 3A
Power
Pusch
Power Control
Control
Adjust Step[-1,1], 1: Format 3
Power
5
Control
When the Power
Power
Step
control Adjust type
Control
Range
for PUSCH is
Adjust
Format 3
for
accumulation, the
Step[-1,0,1,3
Power
PDCCH
parameter is used to
],
Control
DCI 3/3A
select the range of
2: Format 3A
Adjust
Indicated
TPC command step
Power
Step[-1,0,
PUSCH
size of PUSCH for
Control
1,3][1]
TPC
PDCCH DCI format
Adjust
Comman
3/3A.
Step[-1,1] or
d
Format 3 Power Control Adjust Step[-1,0,1,3 ]
ZTE Confidential & Proprietary
51
ZTE LTE FDD Power Control Feature Guide
UL
Cell
poNominal
The parameter
Power
Nominal
PUSCH1
indicates the cell
Control
Power
specific nominal
Required
power for PUSCH
for Data
(re)transmissions
Transmis
corresponding to a
sion in
dynamic scheduled
[-126,24] unit
PUSCH
grant. The parameter
dBm
Dynamic
is used to calculate
Scheduli
the transmit power of
ng
PUSCH, and
Authoriz
embody the power
ation
difference among
Mod
cells.
6
UL
alpha
The parameter is
Power
Path
used to calculate the
Control
Loss Compen
transmit power of PUSCH and is used
sation
to compensate the
0:0,1:0.4,2:0.
Factor
cell pathloss
5,3:0.6,4:0.7,
for
corresponding to a
5:0.8,6:0.9,7:
PUSCH
semi-persistent grant
1.0
Transmis
and a dynamic
sion
scheduled grant. The
Power
parameter is a cell
7
-75
Normal:0. 8, AirLine:1, HighWay: 0.8
specific parameter. UL
powerOffse
When UE calculates
Power
tOfSRS
the transmit power for sounding
Control
reference signal, UE
8
Power
will add the
Offset of
parameter to the
SRS
transmit power for
Relative
PUSCH. When Ks =
to
1.25, the actual
PUSCH
parameter value is PoSRS - 3. When Ks = 0, the actual parameter value is -10.5 + 1.5 * PoSRS.
[0..15]
5
52
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
UL
PUSCH
p0UePusc
Power
Power
h1Pub
Control
Offset
UE specific
of UE in
component for
Dynami
PUSCH
c
(re)transmissions
Schedul
corresponding to a
e or
dynamic scheduled
Semi-St
grant(common initial
atic
value)
9
[-8,7] unit dB
1dB
Schedul ing
4.5.3
Configuration Description
4.5.3.1
Function Activation SRS Power Control includes Open Loop Power Control and Close Loop Power Control. SRS Power Control type is controlled by the Switch for PUSCH Closed-Loop Power Control. SRS Power Control employs Close Loop Power Control when the Switch for PUSCH Closed-Loop Power Control is open, otherwise, SRS Power Control employs Open Loop
Power Control. In the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the button, set the S witch wi tch for P UC C H C losed-L los ed-Loop oop P ower C ontrol parameter to Close[0] Close[0] or Open[1] respectively, so that SRS Power Control employs Open Loop Power Control or Close Loop Power Control, as shown in Figure 4-20. Click the
button.
ZTE Confidential & Proprietary
53
ZTE LTE FDD Power Control Feature Guide
Figure 4-20
4.5.3.2
Configuring SRS Power Control type
Configuring Other Relevant Relevant Parameters 1.
To test different SRS closed loop power control control types, types, in the Configuration Management window Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button, set the
PUSCH power control adjustment type parameter. When the PUSCH power Accumulation[1],, set the DownLink control adjus tment tment type parameter is set to Accumulation[1]
period peri od R S R P meas meas ur ure e s witch wi tch parameter to Open[1] Open[1] (otherwise, (otherwise, retain its default value) , as shown in Figure 4-21. Click the
button.
54
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
Figure 4-21
2.
Configuring SRS Close Loop Power Control Type
To test if the parameters of SRS power control can be normally delivered as configured in the network management system, in the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control . Click the
button, configure the
parameters as shown in Figure 4-22, Figure 4-23 and Figure 4-24. Click the button.
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
Figure 4-22
Configuring the parameters of SRS power control
Figure 4-23
Configuring the Parameter of Power Offset of SRS Relative to PUSCH
55
56
ZTE Confidential & Proprietary
ZTE LTE FDD Power Control Feature Guide
Figure 4-24
3.
Configuring the Parameter of PUSCH Power offset of UE
To test if DCI3/3A can deliver a TPC, in the Configuration the Configuration Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button, set the PUSCH indicated by
to Yes[1],, as shown in Figure 4-25. Click PD C CH DC I 3/3A 3/3A valid valid or not parameter to Yes[1] the
button.
ZTE Confidential & Proprietary
57
ZTE LTE FDD Power Control Feature Guide
Figure 4-25
4.5.3.3
Configuring DCI3/3A Parameters
Function Deactivation In the Configuration Management Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control. Click the
button,
set the Switch for PUCCH Closed-Loop Power Control Control parameter to Close[0] Close[0] or Open[1] respectively, so that SRS Power Control employs Open Loop Power Control or Close Loop Power Control, as shown in Figure 4-20.
4.5.3.4
Data Synchronization Select [Configuration Management->Data Synchronization] from the main menu of the Configuration Management tab. The Data Synchronization dialog box opens. First select NE, then select synchronization mode as Incremental synchronization, last click Synchronize button.
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4.6
4.6.1
ZTE LTE FDD Power Control Feature Guide
PRACH Power Control Parameters List
Table 4-11
Parameters List
SN
4.6.2
Parameters Name
Figure
1
Power Offset Based on PRACH Message
Figure 4-26
2
PRACH Initial Preamble Transmission Power
Figure 4-27
3
PRACH Power Ascending Step
Figure 4-27
4
Transmission Power Offset of Group B Preamble
Figure 4-27
Parameter Configuration Rule
Table 4-12
Configuration rule of parameters Short Name
MO S
Name
N
Name
Defa Description
Value
ult
Range
Valu e
1
UL Power
deltaPreambleMs
The parameter is
Control
g3
a message-based
Power Offset Based on PRACH Message
offset used to compensate the power offset for different PREACH message format and is a cell specific parameter.
[-1..6]
0
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2
PRACH
preambleIniRecei PRACH
vedPower
Initial Preamble Transmis sion Power
0:-120,1:-11 The parameter
8,2:-116,3:-1
indicates initial
14,4:-112,5:-
power for
110,6:-108,7
preamble of
:-106,8:-104,
PRACH. It is that
9:-102,10:-1
the first transmit
00,11:-98,12
power.
:-96,13:-94,1
-100[ 10]
4:-92,15:-90 3
PRACH
powerRampingSt
If no Random
ep
Access Response Response is received by UE after UE transmitted Random Access
PRACH Power
Preamble, UE will
Norm
increase transmit power for PRACH
al:2, AirLin
by Power step
Ascendin
and retry to
g Step
0:0,1:2,2:4,3 :6
e:6, High
transmit Random
Way:
Access Preamble Preamble
6
until Preamble_Trans mission_Counter is equal to Max_retransmit_n umber_for_prach. 4
PRACH
Transmis sion Power Offset of Group B Preamble
messagePowerOf
The parameter is
fsetGroupB
a power control margin for message 3 transmission configured by the eNB and is used to select the Random Access Preambles group A or group B.
0:Minusinfini ty,1:0,2:5,3: 8,4:10,5:12, 6:15,7:18
8[3]
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4.6.3
Configuration Description
4.6.3.1
Function Activation PRACH Power control is enabled acquiescently. There is no switch to control it.
4.6.3.2
Configuring Other Relevant Relevant Parameters 1.
To test if the Power offset based on PRACH message parameter can be normally delivered as configured in the network management system, in the Configuration Management window Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > UL Power Control. Control . Click the the parameters as shown in Figure 4-26. Click the
Figure 4-26
2.
button; configure
button.
Configuring the Power offset based on PRACH message parameter
To test if the other parameters of PRACH Power Control can be normally delivered as configured in the network management system, in the Configuration Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > PRACH. PRACH . Click the parameters as shown in Figure 4-27. Click the
button.
button, configure the
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Figure 4-27
4.6.3.3
Configuring the other parameters of PUCCH Close-Loop power control
Function Deactivation PRACH Power control is enabled acquiescently. There is no switch to control it.
4.6.3.4
Data Synchronization Select [Configuration Management->Data Synchronization] from the main menu of the Configuration Management tab. The Data Synchronization dialog box opens. First select NE, then select synchronization mode as Incremental synchronization, last click Synchronize button.
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4.7 4.7.1
ZTE LTE FDD Power Control Feature Guide
Downlink Power Allocation Parameters List
Table 4-13
Parameters List
SN
4.7.2
Parameters Name
Figure
1
Referenced Signal Power of BP Resource
Figure 4-28
2
Power Offset Between BCCH and Cell RS (P_A_BCCH)
Figure 4-29
3
Power Offset Between CCCH and Cell RS (P_A_CCCH)
Figure 4-29
4
Power Offset Between PCCH and Cell RS (P_A_PCCH)
Figure 4-29
5
Power Offset Between MSG2 and Cell RS (P_A_MSG2)
Figure 4-29
6
Power Offset Between DCCH and Cell RS (P_A_DCCH)
Figure 4-29
7
Power Offset Between PDSCH and Cell RS (P_A_DTCH)
Figure 4-29
Parameter Configuration Rule
Table 4-14
Configuration rule of parameters Short
MO Name
S N
1
Name
Name
Description
Valu
Defa
e
ult
Rang
Valu
e
e
[-60,5
Baseban
Referenc
cpSpeR
d
ed Signal
efSigPw
The parameter indicates the transmit
0]
Resourc
Power of
r
power every resource element of
step
e
BP
cell-specific reference signals of
0.1
Resourc
servered CP. The unit is dBm.
unit
e
dBm
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DL
paForB
For each UE, the ratio of PDSCH
Power
CCH
EPRE to cell-specific RS EPRE
Cont DL
among PDSCH REs in all the OFDM
Power
symbols not containing cell-specific
Control
RS is equal and is denoted by
rol
Rho_A.The UE may assume that for 16 QAM or 64 QAM or spatial multiplexing with more than one layer or for PDSCH transmissions associated with the multi-user MIMO transmission scheme Rho_A is
2
Power
equal to Delta_power_offset + P_A +
Offset
10log10(2) [dB] when the UE
Between
receives a PDSCH data
BCCH
transmission using precoding for
and Cell
transmit diversity with 4 cell-specific
RS
antenna ports, and Rho_A is equal
(P_A_BC
to Delta_power_offset + P_A [dB]
CH)
otherwise, where Delta_power_offset is 0 dB for all PDSCH transmission schemes except multi-user MIMO and P_A is a parameter provided by higher layers. Not necessarily valid in some cases, e.g. QPSK with no spatial multiplexing and without multi-user MIMO transmission mode. The parameter is corresponding to the PDSCH data sourced from BCCH logical channel.
0:-6,1: -4.77, 2:-3,3: -1.77, 4:0,5: 1,6:2, 7:3
0[4]
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DL
paForC
For each UE, the ratio of PDSCH
Power
CCH
EPRE to cell-specific RS EPRE among PDSCH REs in all the OFDM
Control
symbols not containing cell-specific RS is equal and is denoted by Rho_A.The UE may assume that for 16 QAM or 64 QAM or spatial multiplexing with more than one layer or for PDSCH transmiss transmissions ions associated with the multi-user MIMO transmission scheme Rho_A is
3
Power
equal to Delta_power_offset + P_A +
Offset
10log10(2) [dB] when the UE
Between
receives a PDSCH data
CCCH
transmission using precoding for
and Cell
transmit diversity with 4 cell-specific
RS
antenna ports, and Rho_A is equal
(P_A_CC
to Delta_power_offset + P_A [dB]
CH)
otherwise, where Delta_power_offset is 0 dB for all PDSCH transmission schemes except multi-user MIMO and P_A is a parameter provided by higher layers. Not necessarily valid in some cases, e.g. QPSK with no spatial multiplexing and without multi-user MIMO transmission mode. The parameter is corresponding to the PDSCH data sourced from CCCH logical channel.
0:-6,1: -4.77, 2:-3,3: -1.77, 4:0,5: 1,6:2, 7:3
0[4]
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DL
paForP
For each UE, the ratio of PDSCH
Power
CCH
EPRE to cell-specific RS EPRE among PDSCH REs in all the OFDM
Control
symbols not containing cell-specific RS is equal and is denoted by Rho_A.The UE may assume that for 16 QAM or 64 QAM or spatial multiplexing with more than one layer or for PDSCH transmissions associated with the multi-user MIMO transmission scheme Rho_A is
4
Power
equal to Delta_power_offset + P_A +
Offset
10log10(2) [dB] when the UE
Between
receives a PDSCH data
PCCH
transmission using precoding for
and Cell
transmit diversity with 4 cell-specific
RS
antenna ports, and Rho_A is equal
(P_A_PC
to Delta_power_offset + P_A [dB]
CH)
otherwise, where Delta_power_offset is 0 dB for all PDSCH transmission schemes except multi-user MIMO and P_A is a parameter provided by higher layers. Not necessarily valid in some cases, e.g. QPSK with no spatial multiplexing and without multi-user MIMO transmission mode. The parameter is corresponding to the PDSCH data sourced from PCCH logical channel.
0:-6,1: -4.77, 2:-3,3: -1.77, 4:0,5: 1,6:2, 7:3
0[4]
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DL
paForM
For each UE, the ratio of PDSCH
Power
SG2
EPRE to cell-specific RS EPRE
Control
among PDSCH REs in all the OFDM symbols not containing cell-specific RS is equal and is denoted by Rho_A.The UE may assume that for 16 QAM or 64 QAM or spatial multiplexing with more than one layer or for PDSCH transmissions associated with the multi-user MIMO Power Offset Between
5
MSG2 and Cell RS (P_A_M SG2)
transmission scheme Rho_A is equal to Delta_power_offset + P_A +
0:-6,1:
10log10(2) [dB] when the UE
-4.77,
receives a PDSCH data
2:-3,3:
transmission using precoding for
-1.77,
transmit diversity with 4 cell-specific
4:0,5:
antenna ports, and Rho_A is equal
1,6:2,
to Delta_power_offset + P_A [dB]
7:3
otherwise, where Delta_power_offset is 0 dB for all PDSCH transmission schemes except multi-user MIMO and P_A is a parameter provided by higher layers. Not necessarily valid in some cases, e.g. QPSK with no spatial multiplexing and without multi-user MIMO transmission mode. The parameter is corresponding to the PDSCH data sourced from Msg2.
0[4]
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ZTE LTE FDD Power Control Feature Guide
DL
paForD
For each UE, the ratio of PDSCH
Power
CCH
EPRE to cell-specific RS EPRE
Control
among PDSCH REs in all the OFDM symbols not containing cell-specific RS is equal and is denoted by Rho_A.The UE may assume that for 16 QAM or 64 QAM or spatial multiplexing with more than one layer or for PDSCH transmissions associated with the multi-user MIMO transmission scheme Rho_A is Power Offset Between
6
DCCH and Cell RS (P_A_DC CH)
equal to Delta_power_offset + P_A + 10log10(2) [dB] when the UE
0:-6,1:
receives a PDSCH data
-4.77,
transmission using precoding for
2:-3,3:
transmit diversity with 4 cell-specific
-1.77,
antenna ports, and Rho_A is equal
4:0,5:
to Delta_power_offset + P_A [dB]
1,6:2,
otherwise, where
7:3
Delta_power_offset is 0 dB for all PDSCH transmission schemes except multi-user MIMO and P_A is a parameter provided by higher layers. Not necessarily valid in some cases, e.g. QPSK with no spatial multiplexing and without multi-user MIMO transmission mode. The parameter is corresponding to the PDSCH data sourced from DCCH logical channel and its assignment is through CCCH logical channel.
0[4]
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DL
paForD
For each UE, the ratio of PDSCH
Power
TCH
EPRE to cell-specific RS EPRE
Control
among PDSCH REs in all the OFDM symbols not containing cell-specific RS is equal and is denoted by Rho_A.The UE may assume that for 16 QAM or 64 QAM or spatial multiplexing with more than one layer or for PDSCH transmissions associated with the multi-user MIMO transmission scheme Rho_A is Power Offset Between
7
PDSCH and Cell RS (P_A_DT CH)
equal to Delta_power_offset + P_A + 10log10(2) [dB] when the UE
0:-6,1:
receives a PDSCH data
-4.77,
transmission using precoding for
2:-3,3:
transmit diversity with 4 cell-specific
-1.77,
antenna ports, and Rho_A is equal
4:0,5:
to Delta_power_offset + P_A [dB]
1,6:2,
otherwise, where
7:3
0[4]
Delta_power_offset is 0 dB for all PDSCH transmission schemes except multi-user MIMO and P_A is a parameter provided by higher layers. Not necessarily valid in some cases, e.g. QPSK with no spatial multiplexing and without multi-user MIMO transmission mode. The parameter is corresponding to the PDSCH data sourced from DCCH logical channel and its assignment is through CCCH logical channel.
4.7.3
Configuration Description
4.7.3.1
Function Activation Downlink power allocation is enabled acquiescently. There is no switch to control it.
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4.7.3.2
Configuring Other Relevant Relevant Parameters 1.
In the Configuration Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD >Resource Interface Configuration > Baseband Resource. Click the Resource. button, configure the Referenced signal power of BP resource parameter(configuring according to practical test), as shown in Figure 4-28. Click the
Figure 4-28
2.
button.
configuring the the Referenced Referenced signal power of BP resource parameter
To test if the Power offset parameters of downlink logical channel can be normally delivered as configured in the network management system, in the Configuration Management window of the EMS, select Modify Area > Radio Parameter > LTE FDD > E-UTRAN FDD Cell > DL Power Control. Control . Click the the parameter as shown in Figure 4-29. Click the
button.
button, configure
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Figure 4-29
4.7.3.3
Configuring the Power offset parameters of downlink downlink logical channel
Function Deactivation Downlink power allocation is enabled acquiescently. There is no switch to control it.
4.7.3.4
Data Synchronization Select [Configuration Management->Data Synchronization] from the main menu of the Configuration Management tab. The Data Synchronization dialog box opens. First select NE, then select synchronization mode as Incremental synchronization, last click Synchronize button.
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5
5.1 5.1.1
Feature Validation
PUSCH Open-Loop Power Control Topology The topology of PUSCH open-loop power control test is shown in Figure in Figure 5-1. 5-1.
Figure 5-1
Topology of PUSCH Open-Loop Power Control Test
eNB
IP bone
MME / S-GW
PGW
SGW / DHCP Relay
PDN Server
For the
equipment and instruments required in this test, refer to Table to Table 5-1. 5-1.
Table 5-1
Equipment Requirements of the the PUSCH Open-Loop Power Control Test
No. 1
2 3 4 5
5.1.2
Device eNodeB
UE MME PGW
Remarks One
One One One
One
PDN server
Test Specification For the test specifications, refer to Table 5-2..
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Table 5-2
Test Specifications Specifications of PUSCH Open-Loop Power Power Control
Purpose
PUSCH open-loop power control test
Test item
Verify that the PUSCH open-loop power control feature f eature is normal.
1. Set the parameter Switch for PUSCH Closed-Loop Power Control to to Close [0], the parameter Path loss compensation factor for PUSCH transmission power to to 0.8, and the parameter Cell nominal power required for data transmission in PUSCH Prerequisites
dynamic scheduling authorization mode to mode to 46. Keep the default values for other parameters. 2. The LTE system works properly. The cell is established
successfully.
3. The log tools on the eNodeB side and that on the UE side work properly. Step
Expected step result
Place a UE in the center of the 1
serving cell, and initiate an attach operation.
2
Start uplink service from UE to PDN server.
The UE accesses the serving cell
successfully.
The traffic is operating properly.
Stop the uplink service, release 3
the UE, and save the logs on the eNodeB and UE sides.
The PUSCH transmit power on the UE side meets the following Expected Result
formula: P PUSCH (i )
min{PCMAX ,10 log10 (M PUSCH (i))
PO _ PUSCH ( j )
( j ) PL
(i)
TF
f (i)} [dBm
The PUSCH transmit power on the UE side meets the formula
Criteria
defined in the protocol. The traffic is operating properly.
Test result
Passed
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5.1.3
Test Result Use a Qualcomm UE to do the test. After saving logs, use the QCAT to check the test result. Select these logs (0xB0C0 (0xB0C0 LTE RRC OTA Packet, 0xB16C LTE DCI Information Report, and 0xB16E LTE PUSCH Power Control) to Control) to check the test result. View P-max information in SIB1, see Figure see Figure 5-2. 5-2.
Figure 5-2
p-max
View the values of p0-NominalPUSCH and alpha from SIB2, see Figure see Figure 5-3. 5-3.
Figure 5-3
SIB2 Contains Uplink Power Control Parameters
View the P0-UE-PUSCH information from the RRC Connection Reconfiguration message, see Figure 5-4.
Figure 5-4
P0-UE-PUSCH Information
See the number of RBs used in the scheduling of subframes from the PassLTE DCI Information message, see Figure see Figure 5-5. 5-5.
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Figure 5-5
Number of RBs in the DCI Information
Compare the PUSCH power calculated by using the formula with the parameter in the log on the UE side, and determine whether the transmit power is normal. For DCI transmitting in subframe n, the transmit time of PUSCH is n+4 subframe, see Figure 5-6.
Figure 5-6
PUSCH Transmit Power Observed on the UE Side
The following is an example of the calculation: The UE receives the DCI0 message at system-frame 237, subframe 4, with 30 RBs. Calculate the PUSCH power based on the following formula:
P PUSCH (i ) min{PCMAX ,10 log10 ( M PUSCH (i)) PO _ PUSCH ( j ) ( j ) PL TF (i ) f (i )} [ dBm]
=
min {23, 10log1030 + (-80+1) + 0.8 * 82} = 1.37 The UE sends PUSCH four subframes after receiving DCI0. Therefore, check the PUSCH power at frame 237, subframe 8. The actual transmit power is 2, which meets the calculation result. Note: The protocol specifies a redundancy of +/- 2dBm between the actual PUSCH transmit power and the theoretically calculated value.
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5.2 5.2.1
PUSCH Closed-Loop Power Control Topology Refer to 5.1.1 to 5.1.1 Topology. Topology.
5.2.2
Test Specification For the test specifications, refer to Table to Table 5-3. 5-3.
Table 5-3
Test Specifications Specifications of PUSCH Closed-Loop Power Control
Test item
PUSCH closed-loop power control test
Verify that the PUSCH closed-loop power control feature is Purpose
normal.
1. Set the parameter Switch for PUSCH Closed-Loop Power Control to to Open [1], the parameter Path loss compensation factor for PUSCH transmission power to to 0.8, and the parameter Cell nominal power required for data transmission in PUSCH dynamic Prerequisites
scheduling authorization mode to mode to 46. Keep the default values for
other parameters.
2. The LTE system works properly. The cell is established
successfully
3. The log tools on the eNodeB side and that on the UE side work properly.
Step Place a UE at the edge of the 1
serving cell, and perform the attach operation.
2
Start uplink service from UE to PDN server. Adjust the path loss to trigger the
3
eNodeB to send different TPC values.
Expected step result The UE accesses the serving cell successfully.
The traffic is operating properly. Compare the logs on the eNodeB side with those on the UE side. Confirm that the TPC value received by the UE is the same as that on the eNodeB side.
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Stop the uplink service, release 4
the UE, and save the logs on the eNodeB and UE sides. The PUSCH transmit power on the UE side meets the following Expected Result
formula: P PUSCH (i) min{PCMAX ,10 log10 ( M PUSCH (i )) PO_ PUSCH ( j ) ( j ) PL TF (i) f (i)} [ dB
The PUSCH transmit power on the UE side meets the formula Criteria
defined in the protocol. The traffic is operating properly.
Test result
5.2.3
Passed
Test Result For parameters related to the PUSCH power, refer to Section 5.1.3 Section 5.1.3 Test Result. Result. The following are closed-loop PUSCH parameters:
code rates on the power offset value TF (i) compensates the effects of modulation and code PUSCH ) . For of the uplink physical channel. When Ks = 1.25, TF (i ) 10 log10 ( (2 MPRK S 1 ) offset
how to calculated the parameters, refer to the TS36.213 protocol. When Ks = 0, TF (i) 0 . Ks is obtained from the deltaMCS-Enable parameter, and is used to
compensate the effects of code rate adjustment on the uplink physical channel. As shown in Figure 5-4, Ks = 0, and the type of the closed-loop power adjustment is the absolute type.
(i K PUSCH ) . For FDD, K PUSCH 4. Therefore, f(i)= PUSCH
The value unit of PUSCH is dB. The value is related to the TPC values in DCI0 and DCI3/3A. For details, refer to Section 3.2.2 Section 3.2.2 PUSCH Closed-Loop Power Control. Control. When When TPC = 1 in DCI0, PUSCH is 0.
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After closed-loop power control is enabled, the received DCI0 message is shown in Figure 5-7. 5-7.
Figure 5-7
DCI0 Message Received
The PUSCH power corresponding to DCI0 transmission is shown in Figure in Figure 5-8. 5-8.
Figure 5-8
PUSCH Power
Calculate the PUSCH transmit power when the switch for PUSCH closed-loop power control is turned on based on the above Result.
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P PUSCH (i ) min{PCMAX ,10 log10 ( M PUSCH (i)) PO _ PUSCH ( j ) ( j ) PL TF (i ) f (i )} [ dBm]
=min
{23, 10log10100 + (-80 + 1) + 0.8*81 + 1 } = 6.8
5.3 5.3.1
PUCCH Open-Loop Power Control Topology Refer to Section 5.1.1 Section 5.1.1 Topology. Topology.
5.3.2
Test Specification For the test specifications, refer to Table 5-4.
Table 5-4
Test Specifications Specifications of PUCCH Open-Loop Pow Power er Control Control
Purpose
PUCCH open-loop power control test
Test item
Verify that the PUCCH open-loop power control feature is normal.
1. Set the parameter Switch for PUCCH Closed-Loop Power Control to to Close [0], and keep the default values of other
Prerequisites
parameters.
2. The LTE system works properly. The cell is established
successfully
3. The log tools on the eNodeB side and that on the UE side work properly.
Step Place a UE in the center of the 1
serving cell, and initiate the attach operation.
2
Start downlink UDP service from PDN server to UE. Stop the downlink service,
3
release the UE, and save the logs on the eNodeB and UE sides.
Expected step result The UE accesses the serving cell successfully.
The traffic operation is normal.
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The PUCCH transmit power on the UE side meets the following Expected Result
formula:
PPUCCH i min PCMAX , P 0_PUCCH PL h nCQI , nHARQ F_ PUCCH F g i [dB dBm m]
Criteria Test result
5.3.3
The PUCCH transmit power on the UE side meets the formula defined in the protocol. Passed
Test Result Select these logs （0xB0C0 LTE RRC OTA Packet and 0xB16F LTE PUCCH Power Control . View the information about the PUCCH power. power.
Figure 5-9 shows PUCCH power parameters in SIB2. Figure 5-9
PUCCH Power Parameters in SIB2
Figure 5-10 shows PUCCH power parameters in the RRC Connection Reconfiguration message.
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Figure 5-10
PUCCH Power Parameters in the RRC Connection Connection Reconfiguration Reconfiguration
Message
Figure 5-11 shows how to view PUCCH transmit power information from the LTE PUCCH Power Control message.
Figure 5-11
PUCCH Transmit Power Information
The PUCCH power transmitted on subframe 0 of system frame 875 as shown in the above figure is calculated by using the following formula:
PPUCCH i min PCMAX , P 0_PUCCH PL h nCQI , nHARQ F_ PUCCH F g i [dBm]
=
min
{23, (-105 + 1) + 88 + 3 + 17} = 4 Note: There can be a +/- 2 dBm redundancy between the actual and theoretical PUCCH transmit power.
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As shown in the above figure, the actual PUCCH transmit power is the same as the theoretically calculated value. The test passes the verification.
5.4 5.4.1
PUCCH Closed-Loop Power Control Topology Refer to Section 5.1.1 Section 5.1.1 Topology. Topology.
5.4.2
Test Specification For the test specifications, refer to Table to Table 5-5. 5-5.
Table 5-5
Test Specifications Specifications of PUCCH Closed-Loop Power Control
Purpose
PUCCH closed-loop power control
Test item
Verify that the PUCCH closed-loop power control feature is normal.
1. Set the parameter Switch for PUCCH Closed-Loop Power Control to to Open [1], and keep the default values of other
Prerequisites
parameters.
2. The LTE system is operating properly. The cell is established
successfully
3. The log tools on the eNodeB side and that on the UE side work properly. Step
Place a UE in the edge of the 1
serving cell, and initiate the attach operation.
2
Start downlink UDP service from PDN server to UE. Adjust the PL to trigger the
3
eNodeB to send TPC for adjusting the UE's transmit power.
Expected step result The UE accesses the serving cell successfully.
The traffic operation is normal.
Compare the TCP value received on the eNodeB with that received on the UE side. Confirm that they are the same.
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Stop the downlink service, 3
release the UE, and save the logs on the eNodeB and UE sides. The PUCCH transmit power on the UE side meets the following formula:
Expected
PPUCCH i min PCMAX , P 0_PUCCH PL h nCQI , nHARQ F_ PUCCH F g i [dB dBm m]
Result
The PUCCH transmit power on the UE side meets the formula defined in the protocol.
Criteria
The traffic operation is normal. Passed
Test result
5.4.3
Test Result The PUCCH power transmitted on subframe 4 of system frame 311 as shown in Figure 5-12 is calculated by using the following formula:
Figure 5-12
Result of PUCCH Closed-Loop Power Control
PPUCCH i min PCMAX , P 0_PUCCH PL h nCQI , nHARQ F_ PUCCH F g i [dBm] (-105+1) + 124 + 0 + 0 + (-9)} = 11
=min {23,
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Note: There can be a +/- 2 dBm redundancy between the actual and theoretical PUCCH transmit power. As shown in the above figure, the actual PUCCH transmit power is the same as the theoretically calculated value. The test passes the verification.
5.5 5.5.1
SRS Power Control Topology Refer to Section 5.1.1 Section 5.1.1 Topology. Topology.
5.5.2
Test Specification For the test specifications, refer to Table to Table 5-6. 5-6.
Table 5-6
Test Specifications of SRS Power Control
Purpose
SRS closed-loop power control
Test item
To verify that the SRS closed-loop power control feature is normal.
1. Set the parameter Switch for PUSCH Closed-Loop Power Control to to Open Open [1] and the parameter Switch of SRS Configuration to Open [1]. Keep the default values of other Prerequisites
parameters. 2. The LTE system works properly. The cell is established
successfully
3. The log tools on the eNodeB side and that on the UE side work properly.
Step Place a UE on the edge of the 1
serving cell, and initiate the attach operation.
2
Start uplink service from UE to PDN server.
Expected step result The UE accesses the serving cell successfully.
The traffic operation is normal.
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Adjust the path loss to trigger the 3
eNodeB to send different TPC values.
Compare the logs on the eNodeB side with those on the UE side. Confirm that the TPC value received by the UE is the same as that received by the eNodeB.
Stop the uplink service, release 4
the UE, and save the logs on the eNodeB and UE sides. The SRS transmit power on the UE side meets the following Expected Result
formula: PSRS (i ) min{PCMAX , PSRS _ OFFSET
10 log10 ( M SRS )
PO _ PUS CH ( j ) ( j ) PL f (i)} [ dBm]
The SRS transmit power on the UE side meets the formula defined in the protocol.
Criteria
The traffic operation is normal. Test result
5.5.3
Passed
Test Result Select the log (0xB171 LTE SRS Power Control Report) to view SRS power information. Figure 5-13 shows SRS power information in SIB2.
Figure 5-13
SRS Power Parameters in SIB2
The SRS and PUSCH parameters in RRC Connection Reconfiguration message are shown in Figure in Figure 5-14. 5-14.
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Figure 5-14
Re-configured SRS and PUSCH Parameters
The SRS power transmitted on subframe 0 of system frame 330 as shown in Figure 5-15 is calculated as follows:
Figure 5-15
SRS Power Result
PSRS (i ) min{PCMAX , PSRS _ OFFSET
10 log10 ( M SRS )
PO _ PUS CH ( j ) ( j) PL f (i)} [ dBm]
= min{23, (-3) + 10log1024 + (-80 + 1) + 0.8 * 113 + (-4)}=18.202 Note:
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There can be a +/- 2 dBm redundancy between the actual and theoretical transmit transm it power. As shown in the above figure, the actual transmit power is the th e same as the theoretically calculated value. The test passes the verification.
5.6 5.6.1
PRACH Open-Loop Power Control Topology Refer to Section 5.1.1 Section 5.1.1 Topology. Topology.
5.6.2
Test Specification For the test specifications, refer to Table to Table 5-7. 5-7.
Table 5-7
Test Specifications of PRACH Power Control
Purpose
PRACH open-loop power control test
Test item
Verify that the PRACH open-loop power control feature f eature is normal.
1. The LTE system works properly. The cell is established Prerequisites
successfully
2. The log tools on the eNodeB side and that on the UE side work properly.
Expected step result
Step Place a UE on the edge of the 1
The UE accesses the serving cell
serving cell, and initiate the
successfully.
attach operation. 2
Save the logs on the eNodeB and UE sides. The PRACH transmit power on the UE side meets the following Expected Result
formula:
P PRE P rampup dBm PRACH PRA CH min P CMAX PL P O_PRE PREAM AMBLE_M BLE_M sg 3
，
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The PRACH transmit power on the UE side meets the formula defined in the protocol.
Criteria
Test result
5.6.3
Passed
Test Result View the broadcast initial target power and power ramping step received by the UE in SIB2, as shown in Figure in Figure 5-16. 5-16.
Figure 5-16
PRACH Power Parameters in SIB2
View the number of MSG1 transmission times, as shown in Figure in Figure 5-17. 5-17.
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Figure 5-17
Number of MSG1 Transmission Times
View the current path loss value in LTE PUSCH Power Control, as shown in Figure 5-18. 5-18.
Figure 5-18
Path Loss Shown Shown iin n the LTE PUSCH Control Log Log
View the preamble format and PRACH transmit power in MSG1, as shown in in Figure 5-19, 5-19,
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Figure 5-19
Preamble Format and PRACH transmit Power Shown in MSG1
Formula:
P PRE P rampup dBm PRACH PRA CH min P CMAX PL P O_PRE PREAMB AMBLE_M LE_M sg 3
，
= min {22, 126 + (-100) + 0} = 22 = min {22, 26} = 22 Note: There can be a +/- 2 dBm redundancy between the actual and theoretical transmit power. As shown in the above figure, the actual transmit power is the th e same as the theoretically calculated value. The test passes the verification.
5.7 5.7.1
Downlink Power Allocation Topology Refer to Section 5.1.1 Section 5.1.1 Topology. Topology.
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ZTE LTE FDD Power Control Feature Guide
Test Specification For the test specifications of downlink power allocation, refer to Table to Table 5-8. 5-8.
Table 5-8
Test Specifications of Downlink Power Allocation
Purpose
Downlink power allocation test
Test item
To verify that the downlink power allocation feature is normal.
1. The LTE system works properly. The cell is established Prerequisites
successfully
2. The log tools on the eNodeB side and that on the UE side work properly.
Step
Expected step result
Place a UE on the center of the 1
serving cell, and initiate the attach operation.
The UE accesses the serving cell successfully.
Save the logs on the eNodeB and
2
UE sides. Expected Result
The downlink power parameters received on the UE side are the same as those sent on the eNodeB side.
The downlink power parameters received on the UE side are the Criteria
Test result
5.7.3
same as those sent on the eNodeB side.
Passed
Test Result Check View the P_A value received by the terminal In the RRC signaling, as shown in Figure 5-20. 5-20.
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Figure 5-20
P-A Value
Check whether the P_B value and received value of RS are the same on the term terminal inal side, as shown in Figure in Figure 5-21. 5-21.
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Figure 5-21
6 6.1
P_B Value Being the Same as RS Value
Related Counters, KPI and Alarms Related Counters None
6.2
Related KPI None
6.3
Related Alarms None
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7
Impact on Network 1.
Impact on Equipment Performance
None. 2.
Impact on Network KPIs Power control is a basic feature, and it is activated all the time. Advantages of this feature:
For uplink, power control ensures the service quality and suppresses the interference to neighbor cells caused by unnecessary power waste.
For downlink, power allocation is to ensure the cell coverage.
8
Abbreviations For the acronyms and abbreviations, see LTE Glossary .
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