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3G Huawei RAN Resource Monitoring and management 1
Capacity and resource analysis • To figure out the WCDMA network, we have to associate the several information. As WCDMA blockage can occur at several part also the multiple-service will consume different resource in the network. Furthermore the congestion in WCDMA is consisting of soft and hard blocking. Hence we must gather this information for the analysis. The information will be collected is : – Actual resource and configuration – Traffic and KPI statistic – Service distribution
• From these 3 components, we can create 3 dimensions relationship and give the result of enough or inadequate resources for desired service.
Capacity and resource analysis • To figure out the WCDMA network, we have to associate the several information. As WCDMA blockage can occur at several part also the multiple-service will consume different resource in the network. Furthermore the congestion in WCDMA is consisting of soft and hard blocking. Hence we must gather this information for the analysis. The information will be collected is : – Actual resource and configuration – Traffic and KPI statistic – Service distribution
• From these 3 components, we can create 3 dimensions relationship and give the result of enough or inadequate resources for desired service.
Resources and configuration • In Huawei WCDMA network, to avoid the congestion and blockage of the service, we have to monitor the following resources : NE Type
Resource
Expansible
NodeB Level
-CE card and license -NodeB HS-PDSCH code license -UL and DL Iub bandwidth
Yes Yes Yes
Cell Level
-OVSF code -UL power -DL power
No Yes Yes
RAN Resource diagram
•DL total power/DL ENU •RTWP/UL ENU •OVSF Code (DCH/HS-PDSCH)
RRU 1
-CE card -CE license -HS-PDSCH code license
•DL total power/DL ENU •RTWP/UL ENU •OVSF Code (DCH/HS-PDSCH)
RRU 2
•DL total power/DL ENU •RTWP/UL ENU •OVSF Code (DCH/HS-PDSCH)
RRU 3
BBU
UL/DL Iub bandwidth
RNC
Traffic and KPI statistic • To associate the actual situation of resource usage we have to consider in term of : - CS and and PS PS traf traffi fic c - Cong Conges esti tion on - Util Utiliz izat atio ion n
Service distribution • Each service type will occupy different resources. Hence we should divide the traffic volume corresponding to each service type to understand the characteristic of the cell. – AMR – VP – PS R99 DL – PS R99 UL – HSDPA – HSUPA
CE Resource Description • CE resource is consisting of hardware and software. CE is the pool resource at NodeB level, all cells connected to NodeB will share the same CE resource. – Hardware • Number of CEs will be vary upon the model of card.
• Truemove typically uses CE Card model WWBP2 (UL/DL128 CEs). • The monitor will be done at NodeB level. – Software
• 1 License will be equal to 16 CEs. • Number of UL/DL license can be assigned independently. • The monitor can be done separately for UL and DL.
OVSF Code Resource Description OVSF Code is the limit resource of each cell. The expansion can’t be possible in a single cell. OVSF Code will be limited only DL direction. •
Typical usage of OVSF code – AMR : SF128 – SF256
– VP : SF32 – PS R99 DL : SF8 – SF128 – HSDPA : SF16 • Maximum is 15 * SF16 • HSDPA Code usage is depended on Manual or Automatic assignment. More OVSF code manually assigned to HSDPA is less OVSF code left for R99.
NodeB HSDPA Code License Description • Except the available number of free OVSF code, HSDPA is required the license. – HSDPA code license is a pool resource at BBU as same as CE. – Insufficient code license can degrade the throughput of HSDPA user as well.
UL Power Resource Description • Even the UL power is not limit corresponding to each UE power, but the noise raise will trig the rejection due to Call Admission Control as well. Hence, the increment in UL load can cause service rejection and slow down the data service. • For Huawei, UL power resource can divided into 2 type. One is real load in term of RTWP, another one is equivalent load in term of ENU.
DL Power Resource Description • DL Power Limit is considered at RRU total power. Typical use of RRU power in Truemove is 20 and 40 watt. • In general, the common control channel will consume about 20% of total power. • The power consumption of each service will be different as well as the radio condition of each UE (e.g. distance, RSCP, Ec/Io) •
HSDPA will use the remaining power left from R99 service.
UL and DL Iub Bandwidth Description
• Iub is the pool resource at BBU, each RRU have to share same Iub resource. •
Typical configuration bandwidth of Iub is 10 and 20 Mbps.
•
Truemove deploys IP based Iub transmission.
Total resource usage module Rejection
-CS user -PS R99 User -HSDPA User -HSUPA User
Service distribution
-Power -OVSF code -CE -Iub
Resources
-Desire QoS -Congestion
User experience
2 states of service interruption • The user can’t get the service (rejection). • The user can’t get at the desire QoS (low throughput of data service)
Power CAC Algorithm •
Power CAC is applied on both DL and UL
•
We have to consider our selected algorithm. The monitoring method will be
different. Algorithm
•
1 or Algorithm 2 ?
Huawei default for DL is Algorithm1 – Monitor TCP usage for load calculation
•
Huawei default for UL is Algorithm2 – Monitor ENU for UL load calculation
Total RRU power setting • Total Carrier Power (TCP) is one of limited resource depending upon RRU total power output that impact directly to cell capacity and performance. Although it’s the same RRU power, it may different in the capacity because of UE distribution in a cell. To overview the power setting in a cell, we can check parameter setting of total power and CPICH power. •
CPICH Power – MaxPCPICHPower (~ 10% of total cell power) – Default = 33 or 36 dBm
•
Total Power – MaxTxPower – Default = 43 or 46 dBm according to license
By the way, CPICH power + common channel will consume around 20% of total cell power.
TCP Counter and monitoring •
MaxTxPower44
dBm
42
– MaxTxPower = 43 dBm
40
– MaxPCPICHPower = 33 dBm
38
PCPICH + Common channel
•
36
PCPICH
Example : BKD0040U3
34
We can monitor TCP usage from counter – VS.MaxTCP (R99+HSDPA) – VS.MeanTCP (R99+HSDPA)
32
– VS.MaxTCP.NonHS (R99)
30
A ve ra ge of VS. Ma xT CP
– VS.MeanTCP.NonHS (R99) •
We check parameter setting for RAB CAC – DL threshold of Conv AMR service[%] = 80
A ve ra ge of VS. Me anT CP
– DL threshold of Conv non_AMR service[%] = 80
44 MaxTxPower 42
– DL threshold of other services[%] = 75 – DL handover access threshold[%] = 85
40
– DL total power threshold[%] = 90
38
• RRC CAC considers OLC Trigger Threshold for admission
dBm
PCPICH + Common channel 36 PCPICH
– DL OLC trigger threshold[%] = 95
34
32
30
Average of VS.MaxTCP.NonHS
Average of VS.MeanTCP.NonHS
Oversee cell load by ENU • Equivalent number of users (ENU) is the indicator from which maps each service type into one normalize cell load. Higher throughput infer the higher ENU value. To get the UL and DL ENU we refer to these counters. VS.RAC.UL.TotalTrfFactor
UL ENU
VS.RAC.DL.TotalTrfFactor
DL ENU
Typical equivalent number of users (ENU)
Sevice
ENU DCH uplink
DCH downlink
HSDPA
HSUPA
3.4 kbps SIG
0.44
0.42
0.28
1.76
13.6 kbps SIG
1.11
1.11
0.74
1.89
3.4 + 12.2 kbps
1.44
1.42
-
-
3.4 + 8 kbps (PS)
1.35
1.04
0.78
2.26
3.4 + 16 kbps (PS)
1.62
1.25
1.11
2.37
3.4 + 32 kbps (PS)
2.15
2.19
1.70
2.60
3.4 + 64 kbps (PS)
3.45
3.25
2.79
3.14
3.4 + 128 kbps (PS)
5.78
5.93
4.92
4.67
3.4 + 144 kbps (PS)
6.41
6.61
5.46
4.87
3.4 + 256 kbps (PS)
10.18
10.49
9.36
6.61
3.4 + 384 kbps (PS)
14.27
15.52
14.17
9.36
UL ENU counter and monitoring • Take a look at parameter setting of maximum allowed equivalent user number – UL total equivalent user number = 80 (by default) • Example : BKD0040U3 35
•We check parameter setting for RAB CAC -UL threshold of Conv AMR service[%] = 75 -UL threshold of Conv non_AMR service[%] = 75 -UL threshold of other services[%] = 60 -UL handover access threshold[%] = 80 -UL total power threshold[%] = 83 •RRC CAC considers OLC Trigger Threshold for admission -UL OLC trigger threshold[%] = 95
30
25
20
15
10
5
0
Average of VS.RAC.DL.TotalTrfFactor
Average of VS.RAC.UL.TotalTrfFactor
• Have a look UL ENU from counter VS.RAC.UL.TotalTrfFactor •UL ENU = 27.694 at 21:30 PM. •Total UL Load = 27.694/80 = 34.62%
OVSF Code Allocation • In general, OVSF Code is occupied by common channel and for HSDPA (HS-SCCH and HS-PDSCH) as well as HSUPA. The rest of the code will be able to use by traffic channel. SF
8
16
32
PS
PS 384
PS128
PS 64
64
128
256
AMR 0 0 1
0 2 1 3 0
4 2 5 1 6 3 7
0
8 4 9 2 10 5 11 1
12 6 13 3 14 7 15
Channel type 0 1 2 3
CPICH
PCCPCH
AICH
PICH
4
SCCPCH1
5
SCCPCH1
6
SCCPCH1
7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
SCCPCH1
HS-SCCH
HS-SCCH
HS-SCCH
HS-SCCH
HS-SCCH
HS-SCCH
HS-SCCH
HS-SCCH
E-AGCH
E-HICH/E-RGCH
E-HICH/E-RGCH
• Upon the reservation of HS-PDSCH code parameter setting , it may occupy between 5-10 codes. Therefore, the total code left for traffic channel is about (normalize at SF256) : 256 – (19+SF256 of HS-PDSCH(5,10)) = 157 – 77 codes at SF256 • OVSF code usage counter - VS.RAB.SFOccupy - VS.RAB.SFOccupy.MAX
OVSF and CE Consumption for DL DCH service Rate (kbps)
SF
CE Consumption
3.4
256
1
13.6
128
1
8
128
1
16
128
1
32
64
1
64
32
2
128
16
4
144
16
4
256
8
8
384
8
8
Note : Even HS-PDSCH will not utilize DL CE but A HSDPA User will consume 1*SF256 (1 CE) in DL for A-DCH.
OVSF and CE Consumption for UL DCH service Rate (kbps)
SF
CE Consumption
3.4
256
1
13.6
64
1
8
64
1
16
64
1
32
32
1.5
64
16
3
128
8
5
144
8
5
256
4
10
384
4
10
OVSF and CE Consumption for HSUPA Rate (kbps)
SF
CE Consumption
8
256
1
16
64
1
32
64
1.5
64
64
1.5
128
32
3
144
8
3
256
4
5
384
4
10
608
4
10
1450
2SF2
32
2048
2SF2
32
2890
2SF2+2SF4
48
5760
2SF2+2SF4
48
OVSF Code Usage •
Example : BKD0040U3 300
Maximum 256 code is available for 1 cell
Free code for traffic channel
250
200
Total 179 codes is occupied.
160 is reserved for HS-PDSCH 150
100
50
0
Average of VS.RAB.SFOccupy
• • •
Average of VS.RAB.SFOccupy.MAX
•Check parameter setting •LST CELLHSDPA •Allocate Code Mode = MANUAL •Code Number for HS-PDSCH = 10 •By method of reservation by MANUAL then total 10*SF16 = 160 SF256 Code will be reserved for HSPDSCH Code only.
Total 160 + 19 common channel = 179 codes are occupied and forbidden for traffic channel. Free code left for traffic channel = 256-179 = 77 Codes However, 1 SF32 is reserved for handover during CAC process . The actual free left code should be about 77- 8 = 69 Codes or about 34 AMR Voice.
Service rejection due to lack of resource • The rejection occurs at CAC phase, RNC check the network resources. If found insufficient resources for a new service, CAC will reject the service. • The rejection may occur at RRC or RAB setup state. RRC is more critical than RAB rejection as RRC CAC threshold (typical 95% load) is higher than RAB CAC threshold. • To ensure the proper rejection due to lack of resource, we can review the CAC threshold setting prior to perform further analysis.
Counter of RRC rejection due to lack of resource •
RRC Connection Setup Rejection due to lack of resource
Counter of CS RAB rejection due to lack of resource • Number of CS RAB Unsuccessfully Established due to Radio Resource Congestion (Cell)
• Number of CS RAB Unsuccessfully Established due to Iub Bandwidth Congestion (Cell)
Counter of PS RAB rejection due to lack of resource • Number of PS RABs Unsuccessfully Established due to Radio Resource Congestion (Cell)
• Number of RABs Failing to Be Set Up in PS Domain due to Iub Bandwidth Congestion (Cell)
Counter of PS RAB rejection due to lack of resource for different service • Number of Unsuccessful PS RAB Setups for Different Services due to Congestion (Cell)
RRC Setup Congestion Monitor Example : BKD0040U3 UL CE Usage
1.2 160 140
1
120 100
0.8
80 60 40
0.6
20 0
0.4
Sum of VS.LC.U LCreditAvailable.Shared
0.2
Sum of VS.LC.U LMax.L icenseGroup.S hared
Sum of VS.LC.ULMean.LicenseGroup.Shared
0
Sum of VS.RRC.Rej.DLIUBBandCong
Sum of VS.RRC.Rej.DL.CE.Cong
Sum of VS.RRC.Rej.Power.Cong
Sum of VS.RRC.Rej.ULIUBBandCong
Sum of VS.RRC.Rej.UL.CE.Cong
Sum of VS.RRC.Rej.Code.Cong
Found UL CE congestion associates with high UL CE Usage
Note : When RRC Setup failure, RAB setup will not initiate. Theref Setup congestion can not be s
CS RAB Congestion monitoring Example : BKD0040U3
TCP
44 42 40
10 38 dBm
9
36
Congestion but just quite small
8 7 6
34 32 30
5
4
Averageof VS.MaxTCP.NonHS
Averageof VS.MeanTCP.NonHS
3 2
35
1
30
0
UL ENU
25
20
15
Sum of VS.RAB.FailEstab.CS.DLIUBBand.Cong
Sum of VS.RAB.Fail Estab.CS.ULIUBBand.Cong
Su m o f VS.RAB.Fa i lEs tCs .Cod e.Co ng
Su m o f VS.RAB.Fa i lEs tCs .DLCE.Co ng
S um o f VS .R AB .F ai l Es tC s.P ower .Co ng
S um o f VS .R AB .F ai l Es tC s.ULC E.C on g
10
5
0
Average of VS.RAC.DL.TotalTrfFactor
•
•
Found some congestion of power and code -Code is DL OVSF Code -Power is either DL or UL power Associate with TCP and UL ENU, we can judge that power congestion should come from DL
Average of VS.RAC.UL.TotalTrfFactor
LOW ~ 25 ENUs
UL and DL CE Usage Monitoring Example : BKD0040U3 DL CE Usage 120 100 80 60 40 20 0
Sum of VS.LC.DLCreditAvailable.Shared
Sum of VS.LC.DLMax.LicenseGroup.Shared
Sum of VS.LC.DLMean.Licens eGroup.Shared
UL CE Usage 160 140 120 100 80 60 40 20 0
Sum of VS.LC.ULCreditAvailable.Shared Sum of VS.LC.ULMean.LicenseGroup.Shared
Sum of VS.LC.ULMax.LicenseGroup.Shared
As PS RAB congestion has been found in cause UL CE congestion. From CE usage monitoring we can see sometimes the maximum usage touches all available CE.
Observe the type of service • Except the resource usage and rejection, to realize the resource consumption of the cell, we have to figure out the load of each service of a cell to see the distribution and judge which one consumes load the most. •
The service of a single user may be single-RAB or Multi-RAB
• The service of a single user will consume balance or unbalance load between UL and DL e.g. – AMR user : UL CS AMR and DL CS AMR – Old Model mobile : DL+UL PS R99 – iPhone and BB user : UL PS R99 and DL HSDPA – Datacard user : UL HSUPA and DL HSDPA (all the equipment support HSUPA will support HSDPA).
User number counter in a cell • We can roughly discover the number of users to imply the traffic density in a cell. VS.HSDPA.UE.Mean.Cell
Average no of HSDPA users
VS.HSUPA.UE.Mean.Cell
Average no of HSUPA users
VS.CellPCHUEs
Average no of users in CELL_PCH state
VS.CellDCHUEs
Average no of users in CELL_DCH state
VS.CellFACHUEs
Average no of users in CELL_FACH state
Typically, VS.HSUPA.UE.Mean.Cell is the subset of VS.HSDPA.UE.Mean.Cell as UE which supports HSUPA shall support HSDPA. VS.HSDPA.UE.Mean.Cell Overload Congestion Control MaxTxPower = 43 or 46 dBm t e c i C c R e j v r t t c R e r e e s c j e j B e e r A r r R e l l v A o d n a H
t c e j e r B A R R M A
t c e j e r e c i v r e S B A R 9 9 R S P
DL OLC Triggering threshold[%] = 95 DL total power threshold[%] = 90 DL handover access threshold[%] = 85 UL OLC Release threshold[%] = 85 DL threshold of Conv AMR service[%] = 80 DL threshold of Conv non_AMR service[%] = 80 DL threshold of other services[%] = 75 DL LDR Trigger Threshold[%] = 70 DL LDR Release Threshold[%] = 60
Basic Congestion-> LDR
Basic Congestion-> LDR
Resource threshold : UL Power Load Overload Congestion -> Overload Congestion Control UlTotalEqUserNum = 80 (case Algorithm2) t e C c R e i t j c c v R e r r t e j e c s e e r B j r r A e e R v l l o A d n a H
t c e j e r B A R R M A
t c e j e r e c i v r e S B A R 9 9 R S P
UL OLC Triggering threshold[%] = 95% UL OLC Release threshold[%] = 85% UL total power threshold[%] = 83 UL handover access threshold[%] = 80 UL threshold of Conv AMR service[%] = 75 UL threshold of Conv non_AMR service[%] = 75 UL threshold of other services[%] = 60 UL LDR Trigger Threshold[%] = 55 UL LDR Release Threshold[%] = 45
BackgroundNoise = -106 (Algorithm1) Basic Congestion-> LDR
Basic Congestion-> LDR
Resource Threshold : DL OVSF Code
• For RRC connection setup request, the admission accepted when code resource is sufficient for RRC Connection. • For handover, the admission accepted when code resource is sufficient for the service. • For other R99 service, the admission accepted when code resource after admit the service is less than HandOver Credit and Code Reserved SF. •
Dl HandOver Credit and Code Reserved SF = SF32
• For HSDPA service, there is no code resource admission.
Resource Threshold : Iub • For handover of a user, the admission accepted when [load of the path] + [bandwidth required by user] < [Total configured bandwidth of the path] • For a new user, the admission accepted when [load of the path] + [bandwidth required by user] < [Total configured bandwidth of the path] – [bandwidth reserved for handover] • For rate upsizing of a user, the admission accepted when [load of the path] + [bandwidth required by user] < [Total configured bandwidth of the path] – [congestion threshold] •
Forward handover reserved bandwidth[KBIT/S] = 0
•
Backward handover reserved bandwidth[KBIT/S] = 0
•
Forward congestion threshold[KBIT/S] = 0
•
Backward congestion threshold[KBIT/S] = 0
•
Forward congestion clear threshold[KBIT/S] = 0
•
Backward congestion clear threshold[KBIT/S] = 0
Resource Threshold : CE (UL/DL) • For RRC connection setup request, the admission accepted when CE resource is sufficient for RRC Connection. • For handover, the admission accepted when CE resource is sufficient for the service. • For other service, the admission accepted when CE resource after admit the service is not less than Ul HandOver Credit Reserved SF/Dl HandOver Credit and Code Reserved SF. •
Ul HandOver Credit Reserved SF = SF16 (3 CE)
•
Dl HandOver Credit and Code Reserved SF = SF32 (2 CE)
Capacity upgrade solution In resource expansion, these activities would be performed to increase or balance cell capacity (This is assumed that the site has been well optimization) 1.
WBBP upgrade/downgrade
2.
UL/DL CE upgrade/downgrade
3.
Increase UL ENU (if RTWP is normal)
4.
Increase total RRU power
5.
Reduce CPICH power
6.
Reduce fix HS-PDSCH code, if code congest from Voice
7.
Increase fix HS-PDSCH code, if low throughput on HSPDA
8.
Increase Iub bandwidth
N o t e : C a p ac i t y u p g r a d e in t e r m o f o p t i m i z at i o n w o u l d b e t ak e n i n t o a c c o u n t better in cell level. The optim izer shou ld co ntro l cov erage and p arameter e.g. h a n d o v e r i n o r d e r t o b a l an c e b e t w e e n c o v e r ag e a n d c a p a c i t y o f i t s e l f a n d s u r r o u n d i n g c e ll s .
CE
Power Code Iub
WBBP and CE License up/down grade •
Resource unit – WBBP : 128 UL/DL – CE License : 16 CE in UL or DL separately
•
CE resource configuration – To configure and use CE resource at NodeB, it will be defined as BB Resource Group separately for UL and DL – The main concern about the BB Resource Group is • If configure multi WBBP card into one UL BB Resource Group, CE is sum of CE from every WBBP cards. • If configure multi WBBP card into one DL BB Resource Group, CE is CE of only one WBBP card.
One DL BB Resource and UL BB Resource Group
128 UL/DL 128 UL/DL
UL CE = 256 DL CE = 128
WBBP and CE License up/down grade •
Recommendation in CE up/down grade – Add/remove CE License on demand. The CE License is in 16 CE unit. Add or remove in term of 1 license (smallest unit) is recommended for highest efficiency. – WBBP card should be utilized at full license prior to add WBBP. – If UL CE is congestion at full license, adding new WBBP card is needed. – If DL CE is congestion. Reconfigure congested sector to separated WBBP Card can solve the problem prior to add new WBBP Sector1
DL BB Resource Group 0 UL BB Resource Group 0
128 UL/DL 128 UL/DL
UL CE = 256
Sector2
DL CE = 128
Sector3
DL BB Resource Group 0 DL BB Resource Group 1 UL BB Resource Group 0
Sector1 128 UL/DL 128 UL/DL
DL CE = 128 UL CE = 256
Sector2 Sector3
DL CE = 128
CE Configuration and License Information Using NodeB LMT to view Main Cabinet Topology and get info number of WBBP card
WBBP card * Slot 01 is not configured yet.
Or using MML command LST BRD +++ BKA9042U O&M #190945 %%LST BRD: SRN=0;%% RETCODE = 0 Succeed.
2010-09-15 09:45:13
Board Configuration Information ------------------------------Cabinet No. Subrack No. Slot No. Master 0 Master 0 Master 0 Master 0 Master 0 Master 0 Master 0 Master 0 Master 0 Master 0 Master 0 (Number of results = 11)
0 1 2 3 4 5 6 7 16 18 19
Configuration Status
Board Type
NO NO YES YES NO NO NO YES YES NO YES
Unknown Unknown WBBP WBBP Unknown Unknown Unknown WMPT UBF Unknown UPEA
CE Configuration and License Information Using NodeB MML to list the BB Resource Group of DL/UL
LST DLGROUP +++ BKA9042U O&M #191217 %%LST DLGROUP:;%% RETCODE = 0 Succeed.
LST ULGROUP 2010-09-15 09:58:33
DL BB Resource Group Information -------------------------------DL BB Resource Group No. Cabinet No. of DL Process Unit 1 Subrack No. of DL Process Unit 1 Slot No. of DL Process Unit 1
= = = =
0 Master 0 3
DL BB Resource Group No. Cabinet No. of DL Process Unit 1 Subrack No. of DL Process Unit 1 Slot No. of DL Process Unit 1
= = = =
1 Master 0 2
(Number of results = 2) ---
+++ BKA9042U O&M #191359 %%LST ULGROUP:;%% RETCODE = 0 Succeed.
2010-09-15 10:00:30
UL BB Resource Group Information -------------------------------UL BB Resource Group No. Cabinet No. of UL Process Unit 1 Subrack No. of UL Process Unit 1 Slot No. of UL Process Unit 1 Cabinet No. of UL Process Unit 2 Subrack No. of UL Process Unit 2 Slot No. of UL Process Unit 2 (Number of results = 1) ---
END
END
DL Group is divid ed into 2 group w hile UL is set only 1 group
= = = = = = =
0 Master 0 2 Master 0 3
CE Configuration and License Information Using NodeB LMT to view the BB DL/UL Resource Group allocated to each Local Cell LST LOCELL +++ BKA9042U 2010-09-15 10:04:32 O&M #191658 %%LST LOCELL: MODE=ALLLOCALCELL;%% RETCODE = 0 Succeed. Local Cell Configuration(Summary) --------------------------------Local Cell ID Cell ID Site No. 1 300 2 400 3 500 (Number of results = 3) ---
• •
300 300 300
Sector No.
UL BB Resource Group No.
DL BB Resource Group No.
Local Cell Radius(m)
0 1 2
0 0 0
0 1 1
29000 29000 29000
Local Cell Inner Handover Radius(m) 0 0 0
Two Tx Way No No No
END
All Local Cells are using the same UL BB Resource Group Local Cell 1 is using DL BB Resource Group No. 0 while Local Cell 2 and 3 are sharing the DL BB Group No. 1
CE Configuration and License Information Using NodeB LMT to view UL/DL CE License. Not only WBBP Card configuration, CE License should be managed properly DSP Lic ense +++ BKA9042U O&M #193826 %%DSP LICENSE:;%% RETCODE = 0 Succeed.
2010-09-15 10:34:20
NodeB License -------------
Local Local Local Local Local Local Local
Operator Index Operator Name Downlink Frequencies License Status Max Uplink CE Max Downlink CE Max Local Cell HSDPA Function Max HSDPA User HSDPA RRM Package1 Max HS-PDSCH Code Number MBMS Function HSUPA Function PA Sharing Function HSUPA TTI Function CCPIC Function DYNAMIC CE DYNAMIC Voltage 64QAM NUM MIMO NUM Cell Number in 400(0.1dBm) Cell Number in 418(0.1dBm) Cell Number in 430(0.1dBm) Cell Number in 448(0.1dBm) Cell Number in 460(0.1dBm) Cell Number in 478(0.1dBm) Cell Number in 490(0.1dBm) Multi-Mode BTS TS Ethernet Syn IP Clock Function Multi-Mode BTS
Emergency NodeB License ------------Emergency License Set Status (Number of results = 1)
= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
0xffff Shared Unlimited frequency Legal license 256 256 4 Yes 100 Yes 45 No Yes No Yes No Yes No 4 0 0 0 4 0 4 4 0 No No Yes No
=
Unset
CE License would be pool resource for all the BB Resource Groups
Power congestion solution • As we have analyzed the root cause of power congestion whether UL (ENU) or DL (RRU power). The solution would be different up to the type of power congestion. •
Only limit power resource on UL is ENU, UL ENU can adjust ranging from 1 – 200 – The concern of increasing UL ENU is RTWP. Although, call admission is success but it may lead to voice quality and drop call problem to itself or other UEs. – The performance after increasing UL ENU should be closely monitored.
•
If power is congested due to DL power – If coverage is not the issue of the cell, we can slightly reduce the CPICH power. 1 dB step adjust is recommended. – If coverage is the main concern in the serving area, we can increase 1 dB step adjust is recommended.
Note : please try to keep the ratio of CPICH power vs Max Transmit Power of Cell at 10% this would help to easily maintain CPICH Ec/No of the HSDPA carrier.
DL OVSF Code Congestion Solution • At the moment, code congestion would be caused by insufficient code for AMR and PS R99. However, PS DL R99 should be very low as most of DL PS RB is HSDPA. Thus, most of the service congestion due to code should be AMR. • To overcome this problem, the reduction of fix HS-PDSCH code would be the best solution at the moment. The trade-off between AMR and HS-PDSCH code allocation is unavoidable according to limit of DL OVSF Code. • 1 SF16 of HS-PDSCH can convert to about 8 AMR (SF128). This would be equivalent to 1 TRX. Thus, the fix HS-PDSCH 1 code reduction step would recommend to avoid as much as possible impact to HSDPA throughput.
1 HS-PDSCH (SF16)
AMR (SF128)
1
AMR (SF128)
2
AMR (SF128)
3
AMR (SF128)
4
AMR (SF128)
5
AMR (SF128)
6
AMR (SF128)
7
AMR
8
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