Turbo IC

 

Security Level:

RAN15.0 Turbo IC Wireless Product Service Department

 Author/Email: Author's  Author/Email:  Author's name/Author's email Version: V1.0 (20YYMMDD (20YYMMDD)) HUAWEI TECHNOLOGIES CO., LTD.

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Objectives 

 After completing this course, you you will be able to: 

Understand the value and application scenarios of Turbo IC.



Understand the specifications of Turbo IC.



Explain the basic principles of Turbo T urbo IC.



Install, configure, commission, and verify services.

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Contents 

Introduction



Gains



Deployment



Performance Monitoring



 Application Cases



FAQs



References/Acronyms and Abbreviations

 

Background Information 



UE A

The higher UE data rate results in higher interference to other UEs.

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The CDMA system is an uplink selfinterfering system. Its uplink capacity is limited by the multi-access interference (MAI) from UEs in and outside outs ide the system. Therefore, how to effectively manage interference suppression, cancellation, avoidance, and allocation is the key technology to improving system performance. Interference cancellation (IC) reduces or eliminates interference between UEs to effectively improve UE receive performance, which is an effective method to improve uplink capacity. Turbo IC, also called decode IC, executes signal reconstruction and cancellation based on the decoded UE information and greatly reduces interference between UEs and inter-path interference of UE itself to improve UE demodulation performance.

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Technical Principles 

Turbo IC executes signal reconstruction and cancellation based on decoded UE information to eliminate interference of this UE to another UE and to improve UE demodulation performance. Decode IC reconstructs signals using decoded information. Compared with demodulation IC, decode IC improves reconstruction accuracy and IC efficiency.

SIC(Successive

PIC (Parallel IC)

To ottal In Interferen c ce e

To ottal IIn nterferen c ce e

IC)

To ottal In In tte erference

Demodulate or decode Total Interference

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Signal reconstruction and cancellation

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To ottal IIn n tte erference

 

Application Scenario 

Recommended Application Scenarios 

The percentage of High Speed Uplink Packet Access (HSUPA) 2 ms transmission time interval (TTI) UEs for continuous data transmission



is high (such as 50%). High speed 2 ms TTI UEs (such as no less than one at least 1 Mbit/s UEs, or no less than two at least 640 kbit/s UEs) exist.

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Contents 

Introduction



Gains



Deployment



Performance Monitoring



 Application Cases



FAQs



References/Acronyms and Abbreviations

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Feature Gains and Network Impact  

Feature Gains Only WBBPf Boards Configured in Resource R esource Group (In Mode A) 





In the scenario of four 2 ms full buffer UEs, the cell uplink throughput increases by 10% to 30% compared with that of RAN14.0 IC, and by 30% to 70% compared with that of non-IC. In the scenario of twelve 2 ms full buffer UEs, the cell uplink throughput increases by 15% to 30% compared with that of RAN14.0 IC, and by 30% to 60% compared with that of non-IC. In the scenario of 2ms full buffer UEs and burst UEs coexistence, the cell uplink throughput increases by 10% to 25% compared with that of RAN14.0 IC, and by 25% to 50% compared with that of non-IC.

 

Network Impact Impact on System Capacity 



the same full buffer throughput. 

Impact on Network Performance 





Mixed Configuration of WBBPf Boards and Old Boards (in Hybrid IC Mode) 





In the scenario of four 2 ms full buffer UEs, the cell uplink throughput increases by 5% to 20% compared with that of RAN14.0 IC, and by 25% to 60% compared with that of non-IC. In the scenario of twelve 2 ms full buffer UEs, the cell uplink throughput increases by 5% to 25% compared with that of RAN14.0 IC, and by 25% to 60% compared with that of non-IC. In the scenario of 2ms full buffer UEs and burst UEs coexistence, the cell uplink throughput increases by 5% to 15% compared with that of RAN14.0 IC, and by 20% to 50% compared with that of non-IC.

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In the scenario of HSUPA 2 ms TTI UEs for continuous data transmission or HSUPA 2 ms TTI UEs exist, Turbo IC can improve the t he cell uplink throughput. In the coexistence scenario of 2 ms burst and full buffer services, Turbo IC can improve the number of cell uplink UEs with

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Improve cell uplink capacity (number of UEs and uplink throughput). In a resource pool consisting of WBBPa/WBBPb WBBPa/WBB Pb board and WBBPd/ WBBPd/WBBPf  WBBPf  board, a UE whose data channel is established establi shed on the WBBPa/ WBBPa/WBBPb WBBPb board must establish a DPCCH ONLY channel on the WBBPd/WBBPf WBBPd/WBBPf board to enjoy IC gai gains ns of WBBPd/WBBPf WBBPd/WBBPf board (s (set et ICMODE to FULL_IC). Limited DPCCH ONLY channel resources resourc es on the WBBPd/WBBP WBBPd/WBBPff board may result in limited number of UEs and reduce the access success rate.

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Contents 

Introduction



Gains



Deployment



Performance Monitoring



 Application Cases



FAQs



References/Acronyms and Abbreviations

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Prerequisites 



Feature Dependency 

HSUPA 2 ms TTI



HSUPA UL IC

Mutually Exclusive Feature 



None

 Affected Feature 

Time Division Scheduling The prerequisite for Turbo IC gains is interference exists between UEs or multipath interference exists in a UE. The time division scheduling function enables a UE to transmit data in different timeslots to avoid interference between UEs. Therefore, gains will be reduced when the Turbo IC and time division scheduling are enabled at the same time. In addition, when the time division scheduling is enabled, some UEs must have consistent chip offsets. When the number of UEs is smaller compared with the chip processing speed and the number of UE iterations is limited, the UE can benefit be nefit from parallel interference cancellation (PIC) instead of from successive interference cancellation (SIC) high-efficiency processing, resulting resulting in no benefit from Turbo IC.



Hardware Dependency 

Only DBS3900, BTS3900, BTS3900A, and BTS3900AL support this feature and must be configured wit with h the WBBPf board. If If these NodeBs NodeBs support support IC gains gains between between board boards, s, at least one one WBBPd or WBBPf board must be configured in slot 2 or slot 3 as interface boards. If these NodeBs support Turbo IC between boards, WBBPf boards must be configured in the whole uplink resource group.



License Planning 

This feature introduces cell-level Turbo IC license to the NodeB.

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Deployment Suggestions 

Deployment Suggestions 

The received received total wideband wideband power (RTWP) over the Uu interface in a cell is high.



The percentage of HSUPA 2 ms TTI T TI UEs for continuous data transmission is high or high speed 2 ms TTI UEs exist.

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Required Information 

Counters on the RNC 

VS.MeanRTWP (Mean Power of Totally Received Bandwidth for Cell): It is used for checking whether the cell RTWP is limited and evaluating whether Turbo IC is suitable for the cell.



VS.HSUPA.UE.Mean.TTI2ms (Average Number of HSUPA 2 ms TTI UEs in a Cell) and VS.CellDCHUEs (Number of UEs in CELL_DCH State for Cell): It is used for checking the proportion of HSUPA 2 ms TTI TT I UEs and evaluating whether Turbo IC is suitable for the cell.



Counters on the NodeB 

VS.HSUPA.Thruput.ROTMorX and VS.HSUPA.DataTtiNum.ROTMorX: VS.HSUPA.DataTtiNum.ROTMorX: They are used for evaluating the cell throughput and throughput rate gains of Turbo IC.



VS.HSUPA.LoadOutput.X: It is used for evaluating the load gains of Turbo IC.

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VS.HSUPA.TTI2msUserNumber.X:: It is used for VS.HSUPA.TTI2msUserNumber.X f or checking whether HSUPA 2 ms TTI UEs exist in



the cell and evaluating whether Turbo IC is suitable for the cell. VS.HSUPA.Ic.MeanE VS.HSUPA.Ic. MeanEff ff (Average (Average Efficiency Efficiency of IC in the cell) and VS.HSUPA.Ic. VS.HSUPA.Ic.MaxEff MaxEff (Max efficiency of IC in the cell): It is used for evaluating the IC gains of Turbo IC. Note: VS.HSUPA.MeanBitRate.WithData, VS.HSUPA.MeanBitRate, VS.HSUPA.Thruput, and VS.MeanRTWP can also be used for evaluating feature gains (available if necess necessary). ary).

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Parameter Preparation Parameter Name TURBO_IC_SW ITCH

NE

Radio Data Configuration

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MML Command

Description

 ADD LOCELL /MOD LOCELL

 Added cell-level parameter switch. When this switch is turned on, the cell supports Turbo IC.

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Activation and Deactivation 

 Activation 

 Activate HSUPA UL IC and HSUPA 2 ms TTI.



 Activate the license of Turbo IC.

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 Activate Turbo IC (set TURBO_IC_SWITCH to ON) by ru running nning the NodeB MML command ADD LOCELL /MOD LOCELL command or configure the parameters of Turbo IC on the Configuration Management Express (CME).



Deactivation 

Method 1: Deactivate the license of the cell Turbo IC.



Method 2: Disable Turbo IC by running the NodeB command ADD LOCELL

 /MOD LOCELL and set TURBO_IC_SWITCH to OFF. Note: If HSUPA UL UL IC or HSUPA 2 ms TTI is activated because Turbo IC is activated, HSUPA UL IC and HSUPA 2 ms TTI need to be deactivated for deactivating Turbo IC.

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Activation Observation 

 Activation  Activatio n Check 

Check whether Turbo IC is activated by adding a cell-level cell -level counter VS.HSUPA.TurboIC.Number. If the number of UEs enabled with Turbo IC in in a statistics period is greater than 0, Turbo IC is activated. During the test in the lab, check whether Turbo IC is activated using UE IC types collected by call data tracing (CDT).

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Contents 

Introduction



Gains



Deployment



Performance Monitoring



 Application Cases



FAQs



References/Acronyms and Abbreviations

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New Counters Counter Name VS.H VS.HS SUPA. UPA.Th Thru rupu put. t.RO ROTA TAll ll VS VS.HS .HSUP UPA. A.Thr Thrup uput ut.RO .ROTMo TMor3 r3 VS VS.HS .HSUP UPA. A.Thr Thrup uput ut.RO .ROTMo TMor6 r6 VS VS.HS .HSUP UPA. A.Thr Thrup uput ut.RO .ROTMo TMor7 r7 VS VS.HS .HSUP UPA. A.Thr Thrup uput ut.RO .ROTMo TMor9 r9 VS VS.HS .HSUP UPA. A.Thr Thrup uput ut.RO .ROTMo TMor1 r10 0 VS VS.HS .HSUP UPA. A.Thr Thrup uput ut.RO .ROTMo TMor1 r13 3 VS VS.HS .HSUP UPA. A.Thr Thrup uput ut.RO .ROTMo TMor2 r20 0

VS.HSUPA.DataTtiNum.ROTMor20 VS.H VS.HSU SUPA PA.T .Tur urbo boIC IC.. N Num umbe berr VS.HSU VS. HSUPA. PA.TTI2 TTI2msUse msUserNu rNumber mber.0 .0

Counter Description HSUP HSUPA A UE UE th throug roughp hput ut und nder er all all U Uu u inte interf rfac ace e loa loads ds in a ce celll HSUP HSUPA AU UE E thr throu ough ghpu putt u und nder er the the 3 dB or ab abov ove eU Uu u inte interfa rface ce load load in a cel celll HSUP HSUPA AU UE E thr throu ough ghpu putt u und nder er the the 6 dB or ab abov ove eU Uu u inte interfa rface ce load load in a cel celll HSUP HSUPA AU UE E thr throu ough ghpu putt u und nder er the the 7 dB or ab abov ove eU Uu u inte interfa rface ce load load in a cel celll HSUP HSUPA AU UE E thr throu ough ghpu putt u und nder er the the 9 dB or ab abov ove eU Uu u inte interfa rface ce load load in a cel celll HSUP HSUPA A UE tthr hrou ough ghpu putt unde underr the the 10 dB or or abov above e Uu inte interfa rface ce lloa oad d in a ce cell ll HSUP HSUPA A UE tthr hrou ough ghpu putt unde underr the the 13 dB or or abov above e Uu inte interfa rface ce lloa oad d in a ce cell ll HSUP HSUPA A UE tthr hrou ough ghpu putt unde underr the the 20 dB or or abov above e Uu inte interfa rface ce lloa oad d in a ce cell ll Number of TTIs in which HSUPA UEs have data to transmit under the 3 dB dB or above Uu interface load in a cell Number of TTIs in which HSUPA UEs have data to transmit under the 6 dB dB or above Uu interface load in a cell Number of TTIs in which HSUPA UEs have data to transmit under the 7 dB dB or above Uu interface load in a cell Number of TTIs in which HSUPA UEs have data to transmit under the 9 dB dB or above Uu interface load in a cell Number of TTIs in which HSUPA UEs have data to transmit under the 10 dB or above Uu interface load in a cell Number of TTIs in which HSUPA UEs have data to transmit under the 13 dB or above Uu interface load in a cell Number of TTIs in which HSUPA UEs have data to transmit under the 20 dB or above Uu interface load in a cell Av Aver erag age e num numbe berr of UEs UEs ena enabl bled ed with with Turb Turbo o IC in a cel celll Averag Average e number number of HSUPA HSUPA 2 ms T TTI TI UE UEs s at a rate rate of b belo elow w 150 kb kbit/ it/s s in a ce cell ll

VS.HSUPA.TTI2 VS.HS UPA.TTI2msUserNu msUserNumber.1 mber.1

Average Average number number of HSUPA HSUPA 2 ms TTI UEs a att a rate in tthe he range range of [1 [150 50 kb kbit/s,70 it/s,700 0 kbi kbit/s) t/s) iin n a cell

VS.HSUPA.TTI2 VS.HS UPA.TTI2msUserNumb msUserNumber.2 er.2

Average Average number number of HSUPA HSUPA 2 ms TTI UE UEs s at a rate in in the range of [70 [700 0 kbit/s kbit/s,1500 ,1500 kbit/s) in a cell cell

VS.HSUPA.TTI2 VS.HS UPA.TTI2msUserNu msUserNumber.3 mber.3

Average Average number number of HSUPA HSUPA 2 ms TTI UE UEs s at a rate in in the range of [15 [1500 00 kbi kbit/s,300 t/s,3000 0 kbi kbit/s) t/s) iin n a cell cell

VS.HSUPA.TTI2 VS.HS UPA.TTI2msUserNu msUserNumber.4 mber.4

Average Average number number of HSUPA HSUPA 2 ms TTI UE UEs s at a rate in in the range of [30 [3000 00 kbi kbit/s,400 t/s,4000 0 kbi kbit/s) t/s) iin n a cell cell

VS.HSUPA.TTI2 VS.HS UPA.TTI2msUserNu msUserNumber.5 mber.5

Average Average number number of HSUPA HSUPA 2 ms TTI UE UEs s at a rate in in the range of [40 [4000 00 kbi kbit/s,120 t/s,12000 00 kb kbit/s) it/s) iin n a cell cell

VS.HSUPA.DataTtiNum.ROTMor3 VS.HSUPA.DataTtiNum.ROTMor6 VS.HSUPA.DataTtiNum.ROTMor7 VS.HSUPA.DataTtiNum.ROTMor9 VS.HSUPA.DataTtiNum.ROTMor10 VS.HSUPA.DataTtiNum.ROTMor13

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Performance Monitoring 

IC Efficiency 

VS.HSUPA.Ic.MeanEff and VS.HSUPA.Ic.MaxEff: The counters on the NodeB indicate the Turbo IC efficiency.



When HSUPA UL IC and Turbo IC are enabled for the first time, the preceding counters are not zero. When W hen Turbo IC is enabled based on the enabled HSUPA UL IC, the values of the preceding counters will increase.



Uplink System Capacity 

VS.HSUPA.Thruput.ROTMorX VS.HSUPA.Thruput.ROTMor X and VS.HSUPA.DataTtiNum.ROTMorX: VS.HSUPA.DataTtiNum.ROTMorX: The counters on the NodeB indicate the Turbo IC capacity gains.



When the Turbo IC is enabled, the value of VS.HSUPA.Thruput.ROTMorX and VS.HSUPA.Thruput.ROTMorX/VS.HSUPA.DataTtiNum VS.HSUPA.Thruput.ROTMor X/VS.HSUPA.DataTtiNum.ROTMorX .ROTMorX will increase.



Uplink RTWP 

VS.HSUPA.LoadOutput.X: The counter on the NodeB indicates the RTWP gains of Turbo IC.



Turbo IC is enabled, the cell uplink load distribution indicated by the preceding counters becomes smaller.

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Parameter Optimization 

Parameter Optimization: NodeB IC mode(ICMODE) 

If no WBBPa/WBBPb board is configured for the NodeB uplink resource group, the parameter optimization is not involved.



If the WBBPa/WBBPb board is configured for the NodeB uplink resource group and ICMODE is set to PART_IC PART_IC,, ICMODE can be changed from PART_IC to FULL_IC to further improve Uu interface capacity. This change will reduce the number of UEs. Therefore, this parameter optimization is unavailable for the limited number of UEs. Because of the limit to the number of UEs, parameter optimization is not recommended. If uplink capacity needs to increase, increas e, it is recommended that the WBBPa/WBBPb board should be replaced with the WBBPd/WBBPf board to enjoy complete inter-board IC gains.

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Contents 

Introduction



Gains



Deployment



Performance Monitoring



Application Cases



FAQs



References/Acronyms and Abbreviations

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Application Cases  Beta test Portug Port ugal al Op Opti timu mus s ne netw twor ork k Tu Turb rbo o IC vs HSUPA UL IC 



Total 15 cells, counter compara between before and after deployed Turbo IC, total one week, and date from 10:00 to 22:00 every day. After open Turbo IC feature, in the scenario of high uplink load, the cell uplink throughput increases 16%(the percentage percentage of uplink load limited is 3%).

counter  The cell uplink throughput when ROT is limited （kbps）  Average uplink RTWP（dB）

HSUPA HSUPA UL IC Turbo Turbo IC (Turbo IC OFF) ON

Gain

138.19

161.45

16.83%

-104.66

-104.65

-0.23%

Koweit network

Turbo IC vs no IC



Total 2 cells, counter compara between before and after deployed Turbo IC, total one week, and date from 10:00 to 22:00 every day.



After open Turbo IC feature, in the scenario of high uplink load, the cell uplink throughput increases 34%(the percentage percentage of uplink load limited is 5%).

counter  The cell uplink throughput when ROT is limited （kbps）  Average uplink RTWP（dB）

Turbo IC/IC OFF

Turbo Turbo IC gain ON

335.8

452.5

34.8%

-100.2

-103.6

54.3%

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Contents 

Introduction



Gains



Deployment



Performance Monitoring



 Application Cases



FAQs



References/Acronyms and Abbreviations

Page 22

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FAQs



None

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Contents 

Introduction



Gains



Deployment



Performance Monitoring



 Application Cases



FAQs



References/Acronyms References/Acrony ms and Abbreviations

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References 

RAN15.0 Turbo IC Feature Parameter Description



RAN15.0 Turbo IC Feature Design Specification

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Acronym or Abbreviation

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Thank you www.huawei.com Copyrigh Copyr ight©2 t©2012 012 Hua Huawei wei Technol echnologi ogies es Co., Co., Ltd. Ltd. All Rights Rights Reserv Reserved. ed. The information in this document may contain predictive statements including, without limitation, stat statem emen ents ts rega regard rdin ing g th the e fu futu ture re fina financ ncia iall an and d op oper erat atin ing g resu result lts, s, futu future re pr prod oduc uctt po port rtfo foli lio, o, new new tech techno nolo logy gy,, et etc. c. Th Ther ere e ar are e a numb umber of fa fact ctor ors s th that at co cou uld ca caus use e ac actu tua al resu result lts s and and de deve velo lopm pmen entts to dif iffe ferr mate ateri ria all lly y from from th thos ose e ex expr pres esse sed d or impl implie ied d in th the e pr pred edic icti tive ve st stat atem emen ents ts.. Th Ther eref efor ore, e, su such ch info inform rmat atio ion n is pr prov ovid ided ed for  for  re refference purp rpo ose on only ly and constitutes neith ither an offer nor an acceptanc ance. Huawei may change the info in form rmat atio ion n at any any ti time me wi with thou outt noti notice ce..