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RAN
6.1
Network Optimization Parameter Reference
Issue 01
Date 2007-08-20
Part Number
Huawei Technologies Proprietary
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Contents
About This Document.....................................................................................................................1
1 Power Control Parameters........................................................................................................1-1
1.1 Uplink PowerControl Parameters...................................................................................................................1-2
1.1.1 Power Offset Between Access Preamble and Message Control Part.....................................................1-41.1.2 PRACHInitial Transmit Power Constant..............................................................................................1-5
1.1.3 PRACHPower Ramp Step.....................................................................................................................1-6
1.1.4 Maximum Preamble Retransmit Attempts.............................................................................................1-6
1.1.5 Maximum Preamble Loop......................................................................................................................1-7
1.1.6 Default DPCCH Transmit Power Constant............................................................................................1-8
1.1.7 Maximum Allowed Uplink Transmit Power of the UE.........................................................................1-8
1.1.8 RRC/HHO Process SRB Delay............................................................................................................1-10
1.1.9 RRC/HHO Process DPCCH Power Control Preamble Length............................................................1-11
1.2 Downlink Power Control Parameters............................................................................................................1-11
1.2.1 Maximum Downlink Transmit Power of the Radio Link....................................................................1-13
1.2.2 Minimum Downlink Transmit Power of the Radio Link.....................................................................1-14
1.2.3 Cell PCPICH Transmit Power..............................................................................................................1-15
1.2.4 Maximum PCPICH Transmit Power....................................................................................................1-16
1.2.5 Minimum PCPICH Transmit Power....................................................................................................1-16
2 Handover Parameters................................................................................................................2-1
2.1 Intra-Frequency Handover Parameters............................................................................................................2-2
2.1.1 Softer Handover Combination Indication Switch..................................................................................2-4
2.1.2 Intra-Frequency Measurement L3 Filter Coefficient.............................................................................2-4
2.1.3 Weighting Factor....................................................................................................................................2-6
2.1.4 Soft Handover Relative Thresholds.......................................................................................................2-7
2.1.5 Event 1F Absolute Thresholds...............................................................................................................2-8
2.1.6 Hysteresis Related to Soft Handover.....................................................................................................2-9
2.1.7 Time to Trigger Related to Soft Handover...........................................................................................2-11
2.1.8 Minimum Quality Threshold of Soft Handover...................................................................................2-13
2.1.9 Affect 1A and 1B Event Thresholds Flag............................................................................................2-14
2.1.10 Cell Individual Offset.........................................................................................................................2-14
2.2 Inter-Frequency Handover Parameters..........................................................................................................2-15
2.2.1 Inter-Frequency Measurement Report Mode.......................................................................................2-19
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2.2.2 Inter-Frequency Measurement Item.....................................................................................................2-20
2.2.3 Inter-Frequency Measurement Layer 3 Filter Coefficients..................................................................2-22
2.2.4 Frequency Weighting Factor................................................................................................................2-23
2.2.5 Hysteresis Related to Inter-Frequency Handover................................................................................2-24
2.2.6 Time to Trigger Related to Inter-Frequency Hard Handover...............................................................2-25
2.2.7 RSCP-Based Inter-Frequency Measurement Start/Stop Thresholds....................................................2-26
2.2.8 EC/No-based Inter-Frequency Measurement Start/Stop Thresholds.............................................. .....2-27
2.2.9 Target Frequency Trigger Threshold of Inter-Frequency Coverage....................................................2-28
2.2.10 Current Used Frequency Quality Threshold of Inter-Frequency Handover.......................................2-29
2.2.11 Inter-Frequency Measurement Minimum Access Thresholds...........................................................2-30
2.2.12 Cell Individual Offset.........................................................................................................................2-31
2.2.13 Inter-Frequency/Inter-RAT Algorithm Switches...............................................................................2-32
2.2.14 Inter-Frequency/Inter-RAT Measurement Threshold Choice............................................................2-33
2.2.15 Inter-Frequency Measure Timer Length............................................................................................2-34
2.3 Coverage-Based Inter-RAT Handover Management Parameters.................................................................2-34
2.3.1 Inter-RAT Measurement L3 Filter Coefficients...................................................................................2-39
2.3.2 Inter-RAT Measurement Report Mode................................................................................................2-39
2.3.3 Frequency Weighting Factor................................................................................................................2-41
2.3.4 Inter-RAT Period Report Interval........................................................................................................2-42
2.3.5 BSIC Verify Selection Switch..............................................................................................................2-42
2.3.6 Inter-RAT Measurement Quantity.......................................................................................................2-43
2.3.7 RSCP-Based Inter-RAT Measurement Start/Stop Thresholds.............................................................2-44
2.3.8 Ec/No-Based Inter-RAT Measurement Start/Stop Thresholds............................................................2-452.3.9 Inter-RAT Handover Judging Thresholds............................................................................................2-46
2.3.10 Time to Trigger Related to Inter-RAT Handover..............................................................................2-47
2.3.11 Hysteresis Related to Coverage-Based Inter-RAT Handover............................................................2-48
2.3.12 Time to Trigger for Verified GSM Cell.............................................................................................2-49
2.3.13 Time to Trigger for Non-verified GSM Cell......................................................................................2-50
2.3.14 PenaltyTime for Inter-RAT Handover..............................................................................................2-51
2.3.15 Cell Individual Offset.........................................................................................................................2-51
2.3.16 Current Used Frequency Quality Threshold of Inter-RAT Handover...............................................2-52
2.3.17 Inter-RAT Measure Timer Length.....................................................................................................2-53
2.4 Non Coverage-Based Inter-RAT Handover Management Parameters.........................................................2-54
2.4.1 Inter-RAT Service Handover Switches................................................................................................2-56
2.4.2 Inter-RAT Measurement L3 Filter Coefficient....................................................................................2-57
2.4.3 Hysteresis of Event 3C.........................................................................................................................2-57
2.4.4 BSIC Verify Selection Switch..............................................................................................................2-58
2.4.5 Non Coverage-Based Inter-RAT Handover Judging Thresholds.........................................................2-59
2.4.6 Penalty Time for Inter-RAT Handover................................................................................................2-60
2.4.7 Inter-RAT Handover Max Attempt Times...........................................................................................2-61
2.4.8 Inter-RAT Measure Timer Length.......................................................................................................2-62
2.5 Blind Handover Management Parameters.....................................................................................................2-63
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2.5.1 Blind Handover Flag............................................................................................................................2-63
2.5.2 Blind Handover Priority.......................................................................................................................2-64
2.6 Cell Selection and Reselection......................................................................................................................2-65
2.6.1 Measurement Hysteresis Parameters....................................................................................................2-68
2.6.2 Load Level Offsets...............................................................................................................................2-69
2.6.3 Minimum Quality Criterion.................................................................................................................2-70
2.6.4 Minimum Access Level.......................................................................................................................2-71
2.6.5 Cell Reselection Start Thresholds........................................................................................................2-72
2.6.6 Reselection Hysteresis Time................................................................................................................2-73
2.6.7 Minimum Access Level for Inter-RAT Cell........................................................................................2-73
2.6.8 2G Idle Mode MS's Searching for 3G Cell Signal Level Threshold....................................................2-75
2.6.9 3G Cell Reselection Signal Level Offset.............................................................................................2-75
2.6.10 3G Cell Reselection Signal Level Threshold.....................................................................................2-76
2.7 Neighbor Management Parameters...............................................................................................................2-762.7.1 Neighbor Priority Flag.........................................................................................................................2-77
2.7.2 Neighbor Priority..................................................................................................................................2-78
3 Admission Control Parameters................................................................................................3-1
3.1 Uplink and Downlink Initial Access Rates of BE Service..............................................................................3-5
3.2 IntelligentAdmission Algorithm Switch........................................................................................................3-5
3.3 Uplink Total Equivalent User Number...........................................................................................................3-7
3.4 DownlinkTotal NonHSDPA Equivalent User Number.................................................................................3-8
3.5 AMR Voice Uplink Threshold for Conversation Service...............................................................................3-8
3.6 Non AMRVoice Uplink Threshold of Conversation Service........................................................................3-93.7 AMR Voice Downlink Threshold for Conversation Service........................................................................3-10
3.8 Non AMRVoice Downlink Threshold of Conversation Service.................................................................3-11
3.9 Uplink Threshold for Other Services............................................................................................................3-12
3.10 Downlink Threshold for Other Services.....................................................................................................3-13
3.11 Uplink Handover Admission Threshold.....................................................................................................3-14
3.12 Downlink Handover Admission Threshold.................................................................................................3-15
3.13 Downlink Total Power Threshold...............................................................................................................3-16
3.14 Uplink Handover Credit Reserved SF.........................................................................................................3-17
3.15 Downlink Handover Credit and Channel Code Resource Reserved SF.....................................................3-17
4 Load Control Parameters..........................................................................................................4-1
4.1 Cell Load Reshuffling Algorithm Parameters.................................................................................................4-2
4.1.1 Uplink and Downlink LDR Algorithm Switches...................................................................................4-6
4.1.2 LDR Period Timer Length.....................................................................................................................4-7
4.1.3 Uplink and Downlink LDR Trigger Thresholds and Release Thresholds.............................................4-8
4.1.4 Uplink or Downlink LDR Actions.........................................................................................................4-9
4.1.5 Uplink/Downlink LDR Action Handing User Number.......................................................................4-10
4.1.6 Uplink and Downlink Inter-Frequency Cell Load Handover Load Space Thresholds........................4-13
4.1.7 Uplink and Downlink Inter-Frequency Cell Load Handover Maximum Band Width.........................4-13
4.1.8 Cell SF Reserved Threshold.................................................................................................................4-14
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4.1.9 Uplink or Downlink Credit SF Reserved Threshods...........................................................................4-15
4.1.10 LDR Code Priority Indicator..............................................................................................................4-16
4.1.11 MBMS Power Control Service Priority Threshold............................................................................4-16
4.2 Cell Overload Congestion Control Algorithm Parameters...........................................................................4-17
4.2.1 Uplink and Downlink OLC Algorithm Switches.................................................................................4-19
4.2.2 OLC Period Timer Length...................................................................................................................4-20
4.2.3 Uplink and Downlink OLC Trigger Threshold and Release Threshold..............................................4-21
4.2.4 Uplink and Downlink OLC Fast TF Restriction Times.......................................................................4-22
4.2.5 Uplink and Downlink OLC Fast TF Restrict RAB Number................................................................4-22
4.2.6 OLCFast TF Restrict Data Rate Restrict Timer Length And Recover Timer Length........................4-23
4.2.7 Uplink and Downlink Release RAB Number......................................................................................4-24
5 PS Service Rate Control Parameters.......................................................................................5-1
5.1 BE Service Related Threshold Parameters......................................................................................................5-2
5.1.1 BE Service Handover Rate Threshold................................................................................................... 5-3
5.1.2 Uplink/Downlink BE Service Insured Rate...........................................................................................5-4
5.1.3 UpLink and Downlink BE traffic DCH decision threshold...................................................................5-5
5.1.4 DL Streaming Threshold on HSDPA.....................................................................................................5-6
5.1.5 DL BE Traffic Threshold on HSDPA....................................................................................................5-6
5.1.6 UL BE Traffic Threshold on HSUPA....................................................................................................5-7
5.1.7 UL Streaming Traffic Threshold on HSUPA.........................................................................................5-7
5.1.8 Streaming Service HSUPA Transmission Mode................................................................................... 5-8
5.2 Dynamic Channel Configuration Control Parameters.................................................................................... 5-8
5.2.1 Traffic Upper Threshold.......................................................................................................................5-10
5.2.2 Traffic Lower Threshold......................................................................................................................5-11
5.2.3 Time to Trigger Event 4A....................................................................................................................5-12
5.2.4 Time to Trigger Event 4B....................................................................................................................5-12
5.2.5 PendingTime after Trigger Event 4A..................................................................................................5-13
5.2.6 Pendingtime after trigger Event 4B.....................................................................................................5-14
5.2.7 Uplink and Downlink DCCC Rate Thresholds....................................................................................5-15
5.2.8 Uplink and Downlink Middle Rate Thresholds...................................................................................5-15
5.2.9 Uplink and Downlink Rate Adjust Levels...........................................................................................5-16
5.2.10 Low activity bitrate threshold............................................................................................................5-175.3 Link StabilityParameters..............................................................................................................................5-17
5.3.1 Event Ea Relative Threshold................................................................................................................5-18
5.3.2 Event Eb Relative Threshold................................................................................................................5-19
5.3.3 Uplink Full Coverage Rate...................................................................................................................5-19
5.3.4 Downlink Full Coverage Rate..............................................................................................................5-20
5.4 State TransferParameters..............................................................................................................................5-21
5.4.1 DCH to FACH State Transition Timer................................................................................................5-22
5.4.2 DCH to FACH / FACH to PCH State Transition Traffic 4B Threshold..............................................5-23
5.4.3 FACH to PCH State Transition Timer.................................................................................................5-23
5.4.4 Cell ReSelection Timer........................................................................................................................5-24
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5.4.5 FACH to DCH Traffic Report Threshold............................................................................................5-25
5.4.6 FACH to DCH Traffic Time to trigger................................................................................................5-25
5.5 PS Inactive.....................................................................................................................................................5-26
5.5.1 Interactive Service T1..........................................................................................................................5-27
5.5.2 Interactive Service T2..........................................................................................................................5-28
5.5.3 Background Service T1........................................................................................................................5-28
5.5.4 Background Service T1........................................................................................................................5-29
5.5.5 IMS Service T1....................................................................................................................................5-30
5.5.6 IMS Service T2....................................................................................................................................5-30
5.6 RLC Retransmission Monitor Algorithm Parameters...................................................................................5-31
5.6.1 Time to Start Re-TX Monitor...............................................................................................................5-32
5.6.2 Re-Tx Monitor Period..........................................................................................................................5-33
5.6.3 Retransmission Filter Coefficient.........................................................................................................5-34
5.6.4 Event A threshold.................................................................................................................................5-34
5.6.5 Event ATime to Trigger......................................................................................................................5-35
5.6.6 Event APending Time after Trigger....................................................................................................5-35
5.6.7 Event A Report Period.........................................................................................................................5-36
5.6.8 Event BThreshold................................................................................................................................5-36
5.6.9 Event BTime to Trigger......................................................................................................................5-37
5.6.10 Event B Pending Time after Trigger..................................................................................................5-38
6 Miscellaneous Topic Parameters.............................................................................................6-1
6.1 Cell Channel Power Distribution Parameters........................... .......................................................................6-2
6.1.1 Maximum Cell Transmit Power.............................................................................................................6-3
6.1.2 Cell PCPICH Transmit Power................................................................................................................6-4
6.1.3 PSCH and SSCH Transmit Power.........................................................................................................6-4
6.1.4 BCHTransmit Power.............................................................................................................................6-5
6.1.5 Maximum FACH Transmit Power.........................................................................................................6-6
6.1.6 PCH Transmit Power.............................................................................................................................6-7
6.1.7 PICH Transmit Power............................................................................................................................6-7
6.1.8 AICH Transmit Power...........................................................................................................................6-8
6.2 Paging Parameters...........................................................................................................................................6-9
6.2.1 Paging Cycle Coefficient.......................................................................................................................6-96.2.2 Numberof Paging Retransmit..............................................................................................................6-10
6.3 RRC Connection Setup Parameters...............................................................................................................6-11
6.3.1 T300 and N300.....................................................................................................................................6-11
6.4 Synchronization Parameters..........................................................................................................................6-12
6.4.1 Numberof Successive In-sync Indications..........................................................................................6-14
6.4.2 Number of Successive Out-of-sync Indications...................................................................................6-14
6.4.3 Radio Link Failure Timer Duration.....................................................................................................6-15
6.4.4 N312 and T312.....................................................................................................................................6-16
6.4.5 N313, N315, and T313.........................................................................................................................6-17
6.5 Location Update Parameters.........................................................................................................................6-17
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6.5.1 Periodic Location Update Timer..........................................................................................................6-18
6.6 User Priority Related Parameters..................................................................................................................6-18
6.6.1 User Priority of Allocation/Retension Priority 1~14...........................................................................6-19
6.6.2 Integrate Priority Configured Reference..............................................................................................6-20
6.6.3 Indicator of Carrier Type Priority........................................................................................................6-21
7 HSDPA Parameters....................................................................................................................7-1
7.1 HSDPA Power Resource Management Parameters........................................................................................7-2
7.1.1 HS-DPCCH Power Management Parameters........................................................................................7-2
7.1.2 Total Power of HSDPA and Measurement Power Offset Constant.......................................................7-9
7.2 HSDPA CodeResource Management Algorithm Parameters......................................................................7-11
7.2.1 HSDPACode Resource Distribution Mode.........................................................................................7-12
7.2.2 Numberof HS-PDSCH Codes.............................................................................................................7-12
7.2.3 Number of Maximum HS-PDSCH Codes.................................................... .......................................7-13
7.2.4 Numberof Minimum HS-PDSCH Codes............................................................................................7-14
7.2.5 Numberof HS-SCCH Codes................................................................................................................7-14
7.3 HSDPA Mobility Management Parameters..................................................................................................7-15
7.3.1 HSPA Handover Protection Length.....................................................................................................7-15
7.4 HSDPA Direct Retry and Switch of Channel Types Parameters..................................................................7-17
7.4.1 D2H Retry Timer Length.....................................................................................................................7-18
7.4.2 Timer Length of D2H Intra-Handover.................................................................................................7-19
7.4.3 Timer Length of D2H Inter-Handover.................................................................................................7-19
7.4.4 Timer Length of Multi-Carrier Handover............................................................................................7-20
7.4.5 Compress Mode Permission Indication on HSDPA............................................................................7-21
7.5 HSDPA Admission Control Algorithm.........................................................................................................7-21
7.5.1 Maximum HSDPA Users of NodeB....................................................................................................7-22
7.5.2 UL HS-DPCCH Reserve Factor...........................................................................................................7-23
7.5.3 HSDPA Streaming PBR Threshold......................................................................................................7-23
7.5.4 HSDPA Best Effort PBR Threshold....................................................................................................7-24
7.5.5 Maximum HSDPA User Number........................................................................................................7-25
8 HSUPA Parameters....................................................................................................................8-1
8.1 HSUPA MAC-e Scheduling Algorithm Parameters.......................................................................................8-2
8.1.1 Maximum Target Uplink Load Factor...................................................................................................8-2
8.1.2 Target Non-Serving E-DCH to Total E-DCH Power Ratio...................................................................8-3
8.2 HSUPA Admission Control Algorithm...........................................................................................................8-4
8.2.1 Maximum HSUPA User Number.......................................................................................................... 8-4
8.2.2 DL HSUPA Reserved Factor ................................................................................................................ 8-5
8.2.3 NodeB Maximum HSUPA User Number..............................................................................................8-6
9 MBMS Parameters.....................................................................................................................9-1
9.1 MBMS Admission and Load Control Parameters...........................................................................................9-2
9.1.1 Maximum Transmit Power of the FACH...............................................................................................9-3
9.1.2 Minimum Coverage Percentage of the MBMS Service with the Highest Priority................................9-4
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9.1.3 Minimum Coverage Percentage of the MBMS Service with the Lowest Priority.................................9-5
9.1.4 Service Priority Threshold for Decreasing Power..................................................................................9-5
9.1.5 MBMS Preempt Algorithm Switch........................................................................................................9-6
9.2 FLC/FLD Algorithm Parameters....................................................................................................................9-7
10 Algorithm Switches...............................................................................................................10-1
10.1 Connection-Oriented Algorithm Switches in RNC.....................................................................................10-2
10.1.1 Channel Class Algorithm Switches....................................................................................................10-2
10.1.2 Handover Algorithm Switches...........................................................................................................10-6
10.1.3 Power Control Algorithm Switches.................................................................................................10-11
10.1.4 HSPA Algorithm Switches...............................................................................................................10-12
10.1.5 DRD Algorithm Switches................................................................................................................10-14
10.2 Cell Algorithm Switches...........................................................................................................................10-15
10.2.1 Cell Algorithm Switches..................................................................................................................10-15
10.2.2 UplinkAdmission Control Algorithm Switch ................................................................................10-17
10.2.3 Downlink Admission Control Algorithm Switch.............................................................................10-17
10.3 Other Algorithm Switches.........................................................................................................................10-18
10.3.1 Iub CAC Algorithm Switches..........................................................................................................10-18
10.3.2 IubBandwidth Congestion Control Algorithm Switch....................................................................10-19
10.3.3 Intra-Frequency Measurement Control Information Indication.......................................................10-19
10.3.4 Inter-Frequency/Inter-RAT Measurement Indication......................................................................10-20
10.3.5 FACH Measurement Indicator ........................................................................................................10-20
11 Transmission Resource Management Parameters...........................................................11-1
11.1 Transmission Common Parameters.............................................................................................................11-2
11.1.1 AAL2 Path Type................................................................................................................................11-2
11.1.2 IP Path Type.......................................................................................................................................11-3
11.1.3 Per-Hop Behavior...............................................................................................................................11-3
11.2 Iub Admission Control Parameters.............................................................................................................11-4
11.2.1 Reserved Bandwidth for Forward/Backward Handover....................................................................11-4
11.3 Iub Congestion Control Parameters............................................................................................................11-5
11.3.1 Forward/Backward Congestion Threshold.........................................................................................11-8
11.3.2 Forward/Backward Congestion Clear Threshold...............................................................................11-9
11.3.3 Iub Bandwidth Congestion Control Algorithm Switch......................................................................11-9
11.3.4 Timer Length for Iub Bandwidth Restriction Service Rate Reduction............................................11-10
11.3.5 Iub Congestion Factors.....................................................................................................................11-11
12 Parameters Configured on NodeB LMT............................................................................12-1
12.1 HSDPA Flow Control Parameters...............................................................................................................12-2
12.1.1 HSDPA Bandwidth Adjustment Switch............................................................................................12-2
12.1.2 Frame Discard Rate Threshold on Iub Interface................................................................................12-3
12.1.3 Time Delay Threshold on Iub Interface.............................................................................................12-4
12.2 HSDPA MAC-hs Scheduling Algorithm Parameters.................................................................................12-5
12.2.1 Resource Allocate Method.................................................................................................................12-8
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12.2.2 Scheduling Method............................................................................................................................12-9
12.2.3 Maximum Retransmission Count.....................................................................................................12-10
12.2.4 Power Margin...................................................................................................................................12-10
12.2.5 HS-SCCH Power Control Method...................................................................................................12-11
12.2.6 HS-SCCH Fixed Power or Initial Transmit Power..........................................................................12-12
12.2.7 Target HS-SCCH FER.....................................................................................................................12-12
12.2.8 Initial BLER of Data Transfer .........................................................................................................12-13
12.2.9 Resource Limiting Switch................................................................................................................12-14
12.2.10 HSDPA Dynamic Code Switch......................................................................................................12-14
12.2.11 16QAM Switch..............................................................................................................................12-15
12.2.12 CQI Filter Alpha.............................................................................................................................12-16
12.2.13 GBR for SPI...................................................................................................................................12-16
12.2.14 Weight for SPI................................................................................................................................12-18
12.2.15 Resource Limiting Ratio for SPI....................................................................................................12-18
12.3 HSUPA MAC-e Scheduling Algorithm Parameters.................................................................................12-19
12.3.1 AG Threshold...................................................................................................................................12-20
12.3.2 Average Rate Initial Value...............................................................................................................12-20
12.3.3 GBR Schedule Switch......................................................................................................................12-21
12.3.4 Sort Rate Weight..............................................................................................................................12-22
12.3.5 Sort Rate RSN Weight.....................................................................................................................12-22
12.4 HSUPA Power Control Parameters...........................................................................................................12-23
12.4.1 Power Control Algorithm Switches for Downlink Control Channel...............................................12-23
12.4.2 Fixed Power Control Mode Algorithm Parameters..........................................................................12-2812.4.3 Dynamic Power Control Mode Algorithm Parameters....................................................................12-32
12.5 Local Cell Management Parameters..........................................................................................................12-36
12.5.1 Cell Radius.......................................................................................................................................12-36
12.5.2 Cell Handover Radius......................................................................................................................12-37
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Figures
Figure 7-1Impact from over long HSPA protection length...............................................................................7-16
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Table 9-1List of MBMS admission and preempt algorithm parameters.............................................................9-2
Table 9-2List of FLC/FLD algorithm parameters...............................................................................................9-7
Table 10-1Channel algorithm switch................................................................................................................10-3
Table 10-2Handover algorithm switches...........................................................................................................10-6
Table 10-3Power control algorithm switch.....................................................................................................10-11
Table 10-4HSPA Algorithm Switches............................................................................................................10-13
Table 10-5List of DRD algorithm switch........................................................................................................10-14
Table 10-6Cell algorithm switch.....................................................................................................................10-16
Table 10-7CAC algorithm switches................................................................................................................10-18
Table 11-1List of transmission common parameters........................................................................................11-2
Table 11-2List of Iub admission control parameters.........................................................................................11-4
Table 11-3List of Iub congestion control parameters........................................................................................11-6
Table 11-4Iub Congestion Factor Configuration.............................................................................................11-12
Table 12-1List of HSDPA flow control parameters..........................................................................................12-2
Table 12-2List of HSDPA MAC-hs scheduling algorithm parameters.............................................................12-5
Table 12-3GBR, weight and resource limiting ratio for SPI...........................................................................12-17
Table 12-4List of HSUPA MAC-e scheduling algorithm parameters............................................................12-19
Table 12-5List of power control algorithm switches for downlink control channel.......................................12-23
Table 12-6List of fixed power control mode algorithm parameters................................................................12-28
Table 12-7List of dynamic power control mode algorithm parameters..........................................................12-32
Table 12-8List of local cell management parameters......................................................................................12-36
Tables
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About This Document
Purpose
This document provides the engineering technician of commercial office with a parameter setting
baseline and parameter adjustment instructions.
Related Versions
The following table lists the product versions related to this document.
Product Name Version
RNC V200R009
NodeB V100R008
Intended Audience
This document is intended for:
l RNP engineers
l RNO engineers
Update History
Refer to Changes in RAN Network Optimization Parameter Reference.
Organization1 Power Control Parameters
Power control is a key WCDMA technique, through which near and far effect, shadow fading
and fast fading can be overcome to ensure uplink and downlink network performance, reduce
network interference and improve the system quality and capacity. As a result, power control
parameter values have great impact on the network.
2 Handover Parameters
Handover aims to ensure communication continuity and good communication quality.
Handovers in WCDMA system are of the following types: soft handover, softer handover, intra-
frequency hard handover, inter-frequency hard handover, inter-RAT hard handover and so on.Handover emerges as the important factor affecting network performance, and handover
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optimization is also significant in network optimization. Handover parameters are described
according to the handover classification.
3 Admission Control Parameters
Admission control is a way for coordinating the WCDMA system capacity, coverage and quality,and it ensures the system stability and QoS requirement by control over user access.
4 Load Control Parameters
Load control is another very important function in WCDMA system. It maintains the system
load within the normal range to ensure that the systems overall QoS is in the normal range. The
load control includes LDR (Load Reshuffling) and OLC (Overload Control).
5 PS Service Rate Control Parameters
The PS Service rate control includes dynamic channel configuration, state transfer.
6 Miscellaneous Topic Parameters
Special topicparameters include parameters for cell channel power distribution, paging, RRC
connection setup, synchronization and location updating.
7 HSDPA Parameters
HSDPA parameters include HSDPA power resource management parameters, HSDPA code
resource management algorithm parameters, HSDPA mobility management parameters,
HSDPA direct retry and switch of channel types parameters, and HSDPA call admission control
algorithm parameters.
8 HSUPA Parameters
HSUPA parameters include HSUPAMAC-e scheduling algorithm parameters, HSUPA powercontrol parameters, and HSUPA admission control parameters.
9 MBMS Parameters
MBMS parameters mainly include MBMS admission and load control parameters.
10 Algorithm Switches
In the RNC, algorithm switches are divided into two classes: connection-oriented algorithm
switches and cell-oriented algorithm switches.
11 Transmission Resource Management Parameters
The common configurable transmission parameters are listed here.
12 Parameters Configured on NodeB LMT
The parameters configured on the NodeB LMT described here mainly consist of the HSDPA
flow control parameters, the HSDPA MAC-hs scheduling algorithm parameters, the HSUPA
MAC-e scheduling algorithm parameters, the HSUPA power control parameters and the local
cell management parameters.
Conventions
1. Symbol Conventions
The following symbols may be found in this document. They are defined as follows
About This Document
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Symbol Description
DANGER
Indicates a hazard with a high level of risk that, if not avoided,
will result in death or serious injury.
WARNING
Indicates a hazard with a medium or low level of risk which, if
not avoided, could result in minor or moderate injury.
CAUTION
Indicates a potentially hazardous situation that, if not avoided,
could cause equipment damage, data loss, and performance
degradation, or unexpected results.
TIP Indicates a tip that may help you solve a problem or save your
time.
NOTE Provides additional information to emphasize or supplement
important points of the main text.
2. General Conventions
Convention Description
Times New Roman Normal paragraphs are in Times New Roman.
Boldface Names of files,directories,folders,and users are in boldface. For
example,log in as user root.
Italic Book titles are in italics.
Courier New Terminal display is in Courier New.
3. Command Conventions
Convention Description
Boldface The keywords of a command line are in boldface.
Italic Command arguments are in italic.
[ ] Items (keywords or arguments) in square brackets [ ] are optional.
{x | y | ...} Alternative items are grouped in braces and separated by vertical
bars.One is selected.
[ x | y | ... ] Optional alternative items are grouped in square brackets and
separated by vertical bars.One or none is selected.
{ x | y | ... } * Alternative items are grouped in braces and separated by vertical
bars.A minimum of one or a maximum of all can be selected.
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Convention Description
[ x | y | ... ] * Alternative items are grouped in braces and separated by vertical
bars.A minimum of zero or a maximum of all can be selected.
4. GUI Conventions
Convention Description
Boldface Buttons,menus,parameters,tabs,window,and dialog titles are in
boldface. For example,click OK.
> Multi-level menus are in boldfaceand separated by the ">" signs.
For example,choose File > Create > Folder .
5. Keyboard Operation
Convention Description
Key Press the key.For example,press Enterand press Tab.
Key1+Key2 Press the keys concurrently.For example,pressing Ctrl+Alt+A
means the three keys should be pressed concurrently.
Key1,Key2 Press the keys in turn.For example,pressing Alt,A means the two
keys should be pressed in turn.
6. Mouse Operation
Action Description
Click Select and release the primary mouse button without moving the
pointer.
Double-click Press the primary mouse button twice continuously and quickly
without moving the pointer.
Drag Press and hold the primary mouse button and move the pointer
to a certain position.
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1Power Control ParametersAbout This Chapter
Power control is a key WCDMA technique, through which near and far effect, shadow fading
and fast fading can be overcome to ensure uplink and downlink network performance, reduce
network interference and improve the system quality and capacity. As a result, power control
parameter values have great impact on the network.
1.1 Uplink Power Control Parameters
The common configurable uplink power control parameters are listed here.
1.2 Downlink Power Control Parameters
The common configurable downlink power control parameters are listed here.
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1.1 Uplink Power Control Parameters
The common configurable uplink power control parameters are listed here.
Table 1-1List of uplink power control parameters
No.
Parameter ID
ParameterMeaning
DefaultValue
Relevant Command Level
1 PowerOffs
etPpm
Power offset
between the
last access
preamble and
message
control part
Signalling: -3
dB
Services: -2 dB
Set: ADD PRACHTFC
Modify: The PRACH TFC
needs to be deleted before
being reconfigured.
Cell
2 ConstantV
alue
Constant for
PRACH
initial
transmit
power
-20, that is, -20
dB
Set: ADD PRACHBASIC
Modify: The PRACH needs
to be deleted before being
reconfigured.
Cell
3 PowerRam
pStep
Power
increase step
of random
access
preamble
2, that is, 2 dB
4 PreambleR
etransMax
Maximum of
preamble
retransmissio
n
8 times
5 Mmax Max
preamble
loop
8 times Set: ADD RACH
Query: LST RACH
Modify: MOD RACH
Cell
6 DefaultCo
nstantValu
e
Default
constant for
initialDPCCH
transmit
power
-27, that is, -27
dB
Set or modify: SET FRC
Query: LST FRC
RNC
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No.
Parameter ID
ParameterMeaning
DefaultValue
Relevant Command Level
7 MaxAllow
edUlTxPo
wer
MaxUlTx
PowerFor
Conv
MaxUlTx
PowerFor
Str
MaxUlTx
PowerForI
nt
MaxUlTxPowerFor
Bac
Maximum
UE uplink
transmit
power per
service
24, that is, 24
dBm
MaxAllowedUlTxPower
Set: ADDCELLSELRESEL
Query: LST
CELLSELRESEL
Modify: MOD
CELLSELRESEL
Service-Oriented
Parameters
Set: ADD CELLCAC
Query: LST CELLCAC
Modify: MOD CELLCAC
Cell
8 RRCPRO
CSRBDE
LAY
HHOPRO
CSRBDE
LAY
Delay of SRB
in DCH RRC
process
[Frame]
Delay of SRB
in DCH HHO
process
[Frame]
7 Set: ADD CELLCAC
Query: LST CELLCAC
Modify: MOD CELLCAC
Cell
9 RRCPRO
CPCPREA
MBLE
HHOPRO
CPCPREA
MBLE
RRC Proc
DPCCH PC
preamble
length
[Frame]
HHO Proc
DPCCH PC
preamble
length
[Frame]
RRC: 0
HHO: 7
1.1.1 Power Offset Between Access Preamble and Message Control Part
This parameter is the power offset between the last access preamble and the message control
part. The access preamble power plus this offset equals the power of the control part.
1.1.2 PRACH Initial Transmit Power Constant
This parameter is the constant for the UE to estimate the initial PRACH transmit power in the
open loop power control process.
1.1.3 PRACH Power Ramp Step
This parameter is the power increase step of the random access preambles transmitted before
the UE which receives the acquisition indicator in the random access process.
1.1.4 Maximum Preamble Retransmit Attempts
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This parameter is the maximum number of preambles retransmission of the UE in a preamble
ramping cycle.
1.1.5 Maximum Preamble Loop
This parameter defines the maximum number of random access preamble loops. When the UE
has transmitted the access preamble and the number of retransmission times has reachedPreambleRetransMax, if the UE still has not received the capture indication, it repeats the access
attempt after the specified waiting time. The maximum number of recycle cannot exceed Mmax.
1.1.6 Default DPCCH Transmit Power Constant
This parameter is used by the RNC to compute the DPCCH power offset which is used by the
UE to compute the initial transmit power of UL DPCCH during the open loop power control
process.
1.1.7 Maximum Allowed Uplink Transmit Power of the UE
The MaxAllowedULTxPower parameter determines the maximum transmit power of an UE
when the UE gains access to a specific cell. This means that the cell selects
UE_TXPWR_MAX_RACH in the S rule. In addition, there are four maximum UE transmitpower parameters oriented to different QoS services.
1.1.8 RRC/HHO Process SRB Delay
This parameter defines the delay of SRB in DCH RRC/HHO process.
1.1.9 RRC/HHO Process DPCCH Power Control Preamble Length
This parameter defines the DPCCH power control preamble length in DCH RRC/HHO process.
1.1.1 Power Offset Between Access Preamble and Message ControlPart
This parameter is the power offset between the last access preamble and the message controlpart. The access preamble power plus this offset equals the power of the control part.
Parameter ID
PowerOffsetPpm
Value Range
5 to 10
Physical Value Range
5 dB to 10 dB, step 1 dB
Parameter Setting
According tothe field test results, the recommended value during signaling transmission is set
to 3 dB, andthat during service transmission to 2 dB.
Impact on the Network Performance
l
If the parameter value is set too low, it is likely that the signaling and the service data carriedover theRACH cannot be received by UTRAN, which affects the uplink coverage.
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l If the value is too high, the uplink interference is increased, and the uplink capacity is
affected.
Relevant Commands
Set the parameter through ADD PRACHTFC, delete the PRACH TFC through RMV
PRACHTFCbefore reconfiguring it.
It is necessary to deactivate PRACH (DEA PRACH) and the cell (DEA CELL) before RMV
PRACHTFCis executed.
1.1.2 PRACH Initial Transmit Power Constant
This parameter is the constant for the UE to estimate the initial PRACH transmit power in the
open loop power control process.
Parameter ID
ConstantValue
Value Range
-35 to -10
Physical Value Range
-35 dB to -10 dBstep 1 dB
Parameter Setting
The default value is -20, that is, -20 dB.
This parameter is used to calculate the transmit power of the first preamble in the random access
process. The formula is as follows:
Preamble_Initial_Power= PCPICH DL TX power- CPICH_RSCP+ UL_interference+
Constant_Value
where
l Preamble_Initial_Poweris the preamble initial transmit power of the UE.l PCPICH DL TX poweris downlink transmit power of the PCPICH.
l CPICH_RSCPis the received signaling code power of the PCPICH measured by the UE.
l UL_interferenceis the uplink interference, which is obtained by the UE receiving data
from the broadcast channel. It is calculated at the network side and broadcast to the UE.
This value is kept in the background record of the UE under test.
l Constant_Valueis obtained by the UE receiving data from the broadcast channel.
Impact on the Network Performance
l
If the parameter value is set too high, the initial transmit power becomes higher, whereasthe duration of the access process becomes shorter.
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l If the value is too low, to satisfy the requirement of access power, it requires more ramps
and lengthens the access period.
Relevant Commands
Set this parameter through ADD PRACHBASICand modify it through MOD
PRACHUUPARAS.
1.1.3 PRACH Power Ramp Step
This parameter is the power increase step of the random access preambles transmitted before
the UE which receives the acquisition indicator in the random access process.
Parameter ID
PowerRampStep
Value Range
1 to 8
Physical Value Range
1 dB to 8 dB, step 1 dB
Parameter Setting
The default value is 2, that is 2 dB.
Impact on the Network Performance
l If this value is too high, the access process is shortened, but the probability of power waste
is higher.
l If it is too low, the access process is lengthened, but the transmitting power is saved.
It is a value should be weighed.
Relevant Commands
Set this parameter through ADD PRACHBASICmodify it through MOD
PRACHUUPARAS, and query it through LST PRACH.
1.1.4 Maximum Preamble Retransmit Attempts
This parameter is the maximum number of preambles retransmission of the UE in a preamble
ramping cycle.
Parameter ID
PreambleRetransMax
Value Range
1 to 64
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Physical Value Range
1 to 64 times
Parameter SettingThe default value is 8 times.
The product of this parameter and the previous PRACH Power Ramp Step determines the
maximum ramp power of the UE within a preamble ramping cycle.
Impact on the Network Performance
l If this value is too low, the preamble power may fail to ramp to the required value, resulting
in UE access failure.
l If it is too high, the UE may repeatedly make access attempts by increasing the transmit
power, resulting in interference to other users.
Relevant Commands
Set this parameter through ADD PRACHBASIC, modify it through MOD
PRACHUUPARAS, and query it through LST PRACH.
1.1.5 Maximum Preamble Loop
This parameter defines the maximum number of random access preamble loops. When the UE
has transmitted the access preamble and the number of retransmission times has reached
PreambleRetransMax, if the UE still has not received the capture indication, it repeats the accessattempt after the specified waiting time. The maximum number of recycle cannot exceed Mmax.
Parameter ID
Mmax
Value Range
1 to 32
Physical Value RangeNone.
Parameter Setting
The default value is 8.
Impact on the Network Performance
l If this parameter is too low, the UE access success rate is influenced.
l
If it is too high, the UE probably tries access attempt repeatedly within a long time, whichincreases the uplink interference.
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Relevant Commands
Set this parameter through ADD RACH, query it through LST RACH, and modify it through
MOD RACH.
1.1.6 Default DPCCH Transmit Power ConstantThis parameter is used by the RNC to compute the DPCCH power offset which is used by the
UE to compute the initial transmit power of UL DPCCH during the open loop power control
process.
Parameter ID
DefaultConstantValue
Value Range
-35 to -10
Physical Value Range
-35 dB to -10 dB
Parameter Setting
The default value is -27, that is -27 dB.
The formula given in the protocol 25.331 is as follows:
DPCCH_Initial_power= DPCCH_Power_offset- CPICH_RSCP
Where, CPICH_RSCPis the received signaling code power of the PCPICH measured by the
UE.
Impact on the Network Performance
l If this parameter is too low, the uplink synchronization at the cell verge may fail during
initial link setup, which influences the uplink coverage.
l If it is too high, it leads to instant interference to the uplink receiving, decreasing uplink
receiving performance.
Relevant CommandsSet or modify this parameter through SET FRCand query it through LST FRC.
1.1.7 Maximum Allowed Uplink Transmit Power of the UE
The MaxAllowedULTxPower parameter determines the maximum transmit power of an UE
when the UE gains access to a specific cell. This means that the cell selects
UE_TXPWR_MAX_RACH in the S rule. In addition, there are four maximum UE transmit
power parameters oriented to different QoS services.
Parameter ID
MaxAllowedUlTxPower
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MaxUlTxPowerForConv (maximum transmit power for the session service)
MaxUlTxPowerForStr (maximum transmit power for the stream service)
MaxUlTxPowerForInt (maximum transmit power for the exchange service)
MaxUlTxPowerForBac (maximum transmit power for the background service)
Value Range
-50 to +33
Physical Value Range
-50 dBm to +33 dBm, with step length as 1 dBm
Parameter Setting
The setting of this parameter is based on the planned uplink network coverage.
The default setting of MaxAllowedULTxPower is 21, which stands for 21 dBm. The values of
the other four parameters cannot be greater than the value of MaxAllowedULTxPower.
By default, the parameters MaxUlTxPowerForConv, MaxUlTxPowerForStr,
MaxUlTxPowerForInt, and MaxUlTxPowerForBac are set to 24 dBm.
If the capacity of a cell is restricted, this group of parameters are not a constraint for the cell.
The reason is that the rapid power control function can dynamically adjust the transmit power
of an UE. If the coverage of a cell is restricted, the following formula is provided according to
the requirement of full coverage: You can infer that
Noiserise= Itotal/PN.
Where:
l PUE,maxrepresents the maximum transmit power of the UE.
l Lmaxrepresents the maximum path loss.
l The character v represents the activation factor of a service.l Gprepresents the processing gain of a service. The formula is: Gp= W/R, where W
represents signal bandwidth and R represents the data transmission rate of a service.
l Garepresents antenna gain, which is the sum of the actual antenna gain and the cable loss
gain.
l Gdrepresents the sum of diversity gains, such as multi-path diversity gain and receiver
antenna gain.
l PNrepresents the background noise.
l Eb/Io represents the target SIR value of a service.
For the services that do not require full cell coverage, you can also use the previous formula tomeasure the transmit power of the UE that meets the special requirement for coverage area. If
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the transmit power of an UE has reached the maximum, you can use the previous formula to
measure the uplink coverage area.
Impact on Network Performance
If coverage area is restricted, the uplink coverage area is affected if this parameter is set to a
very small value.
Relevant Commands
MaxAllowedUlTxPower: use the ADD CELLSELRESELcommand for configuration, the
LST CELLSELRESELcommand for query, and the MOD CELLSELRESELcommand for
modification.
Service-oriented parameters: use the ADD CELLCACcommand for configuration, the LST
CELLCACcommand for query, and the MOD CELLCACcommand for modification.
1.1.8 RRC/HHO Process SRB Delay
This parameter defines the delay of SRB in DCH RRC/HHO process.
Parameter ID
RRCPROCSRBDELAY
HHOPROCSRBDELAY
Value Range
0 to 7
Physical Value Range
0 to 7 frames, step is 1
Parameter Setting
The default value of each parameter is 7.
The delay of SRB involves the following signalling: PHYSICAL CHANNEL
RECONFIGURATION, RADIO BEARER ESTABLISHMENT, RADIO BEARER
RECONFIGURATION, RADIO BEARER RELEASE, TRANSPORT CHANNEL
RECONFIGURATION, HANDOVER TO UTRAN COMMAND, RRC CONNECTION
SETUP and CELL UPDATE CONFIRM.
Impact on the Network Performance
The improper setting of this parameter will result in data loss and retransmission delay, which
may have a negative effect on service rate and transmission delay.
Relevant Commands
Set this parameter through ADD CELLCAC, query it through LST CELLCACand modify itthrough MOD CELLCAC.
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1.1.9 RRC/HHO Process DPCCH Power Control Preamble Length
This parameter defines the DPCCH power control preamble length in DCH RRC/HHO process.
Parameter IDRRCPROCPCPREAMBLE
HHOPROCPCPREAMBLE
Value Range
0 to 7
Physical Value Range
0 to 7 times, step is 1
Parameter Setting
RRCPROCPCPREAMBLE is set to 0 by default, and the default value of
HHOPROCPCPREAMBLE is 7.
The power control preamble involves the following signalling: PHYSICAL CHANNEL
RECONFIGURATION, RADIO BEARER ESTABLISHMENT, RADIO BEARER
RECONFIGURATION, RADIO BEARER RELEASE, TRANSPORT CHANNEL
RECONFIGURATION, HANDOVER TO UTRAN COMMAND, RRC CONNECTION
SETUP and CELL UPDATE CONFIRM.
This parameter is initially used for uplink/downlink power control convergence, preventing UEfrom using an uncontrollable power at the beginning. When the UE transmits signals on the
DPCCH, the NodeB needs a period of time to recognize the uplink signals. The length of this
period of time depends on the search implementation and the transmission delay. It is useless to
start the uplink transmission on DPDCH before the above process is completed. Because at that
time, the data can not be correctly received and will be lost. If the AM mode is used, the
retransmission may lead to a much longer delay for data transmission.
The power control algorithm 1 is the only selection during the preamble period. This parameter
is closely related to the DPCCH initial transmit power, the initial SIR target, the power control
algorithm itself and the NodeB search ability, so it should be properly adjusted in reality.
Impact on the Network PerformanceThe improper setting of this parameter will result in data loss and retransmission delay, which
may have a negative effect on service rate and transmission delay.
Relevant Commands
Set this parameter through ADD CELLCAC, query it through LST CELLCACand modify it
through MOD CELLCAC.
1.2 Downlink Power Control ParametersThe common configurable downlink power control parameters are listed here.
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Table 1-2List of downlink power control parameters
No. Parameter ID
ParameterMeaning
Default Value RelevantCommand
Level
1 RlMaxDlPwr
Maximumdownlink
transmit
power of
the radio
link
Refer to the tableMaximum and
minimum
downlink transmit
powers
Set: ADDCELLRLPWR
Query: LST
CELLRLPWR
Modify: MOD
CELLRLPWR
Cell
2 RlMinD
lPwr
Minimum
downlink
transmit
power of
the radio
link
3 PCPICH
Power
Cell
PCPICH
transmit
power
330, that is, 33 dBm Set: ADD PCPICH
Query: LST
PCPICH
Modify: MOD
CELL
4 MaxPC
PICHPo
wer
Maximum
PCPICH
transmit
power
346, that is, 34.6
dBm
Set: ADD PCPICH
Query: LST
PCPICH
Modfy: MOD
PCPICHPWR5 MinPCP
ICHPow
er
Minimum
PCPICH
transmit
power
313, that is, 31.3
dBm
1.2.1 Maximum Downlink Transmit Power of the Radio Link
This parameter is the maximum downlink transmit power of radio link. It should fulfill the
coverage requirement of the network planning, and the value is relative to PCPICH transmit
power.
1.2.2 Minimum Downlink Transmit Power of the Radio Link
This parameter is the minimum transmit power of downlink radio link. It should be considered
with the maximum downlink transmit power and the dynamic range of power control, and its
value is relative to PCPICH transmit power.
1.2.3 Cell PCPICH Transmit Power
It is used to determine the power of Primary CPICH of a cell. The reference point is the antenna
connector of NodeB. Its value is related to the downlink coverage in the network planning.
1.2.4 Maximum PCPICH Transmit Power
It is used to determine the maximum transmit power of primary CPICH of a cell. The reference
point is the antenna connector of NodeB. Its value is related to the downlink coverage in the
network planning.
1.2.5 Minimum PCPICH Transmit Power
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It is used to determine the minimum transmit power of primary CPICH of a cell. The reference
point is the antenna connector of NodeB. Its value is related to the downlink coverage in the
network planning.
1.2.1 Maximum Downlink Transmit Power of the Radio LinkThis parameter is the maximum downlink transmit power of radio link. It should fulfill the
coverage requirement of the network planning, and the value is relative to PCPICH transmit
power.
Parameter ID
RlMaxDlPwr
Value Range
-350 to 150
Physical Value Range
-35 dB to 15 dB, step 0.1 dB
Parameter Setting
The service type and the service rate should be considered in parameter configuration. For an
individual service, the configuration values are listed in Table 1-3.
Table 1-3Maximum and minimum downlink transmit powers
Service Type (uint: bit/s) Max. Downlink TransmitPower (in the parenthesesis the dB value)
Min. DownlinkTransmit Power (in theparentheses is the dBvalue)
CS
12.2K AMR 0(0) -150(-15)
64K transparent data 30(3) -120(-12)
56K transparent data 0(0) -150(-15)
32K transparent data -20(-2) -170(-17)
28.8K transparent data -20(-2) -170(-17)
57.6K controllable stream -10(-1) -160(-16)
PS
0 stream (unidirectional) -20(-2) -170(-17)
384K 40(4) -110(-11)
256K 20(2) -130(-13)
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Service Type (uint: bit/s) Max. Downlink TransmitPower (in the parenthesesis the dB value)
Min. DownlinkTransmit Power (in theparentheses is the dBvalue)
144K 0(0) -150(-15)
128K 0(0) -150(-15)
64K 0(0) -150(-15)
32K -40(-4) -190(-19)
16K -60(-6) -210(-21)
8K -80(-8) -230(-23)
For combined services, the maximum and minimum transmit power is computed by the RNCaccording to the configuration of individual services.
Impact on the Network Performance
l If this parameter is too high, downlink interference may occur.
l If it is too low, it may influence the normal functioning of downlink power control.
Relevant Commands
Set this parameter through ADD CELLRLPWR, query it through LST CELLRLPWRand
modify it through MOD CELLRLPWR.
1.2.2 Minimum Downlink Transmit Power of the Radio Link
This parameter is the minimum transmitpower of downlink radio link. It shouldbe considered
with the maximum downlink transmit power and the dynamic range of power control, and its
value is relative to PCPICH transmit power.
Parameter ID
RlMinDlPwr
Value Range
-350 to 150
Physical Value Range
-35 dB to 15 dB, step 0.1 dB
Parameter Setting
Since the dynamic range of power control is set to 15 dB, this parameter is recommended as RL
Max DL TX power-15 dB and refer to the related description of the sub clause MaximumDownlink Transmit Power of the Radio Link.
1 Power Control Parameters
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Impact on the Network Performance
l If this parameter is too low, the transmit power may become too low because of incorrect
estimation of SIR.
l If it is too high, it may influence the normal functioning of downlink power control.
Relevant Commands
Set this parameter through ADD CELLRLPWR, query it through LST CELLRLPWRand
modify it through MOD CELLRLPWR.
1.2.3 Cell PCPICH Transmit Power
It is used to determine the power of Primary CPICH of a cell. The reference point is the antenna
connector of NodeB. Its value is related to the downlink coverage in the network planning.
Parameter ID
PCPICHPower
Value Range
-100 to 500
Physical Value Range
-10 dBm to 50 dBm, step 0.1 dBm
Parameter Setting
The default setting is 330, namely 33 dBm.
This parameter should be set based on the actual system environment such as cell coverage
(radius) and geographical environment. For the cells to be covered, the downlink coverage
should be guaranteed as a premise. For the cells requiring sof