Dynamic target ROT Adjustment.pptx

Introduction to the RAN14.0 Fe ature Dynamic Target RoT Adju stment

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Training Objects • After this training, you are supposed to: ›

Know the value and application scenarios of the dynamic target RoT adjustment featur e.

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Understand the feature specifications.

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Explain basic principles of the feature.

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Be able to activate and verify the feature according to the manual.

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Feature Description Benefits On a live network, the cell coverage varies greatly with radio environments, such as densely populated urban areas and suburbs. Setting the target ROT to a fixed value cannot account for varied radio environments. Therefore, Dynamic Target RoT Adjustment is introduced to adaptively adjust the target RoT to increase the uplink cell throughput without affecting the cell coverage.

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Functions •

The NodeB determines whether the UE's transmit power is insufficient based on the UE power headroom (UPH) and effective rates of all HSUPA UEs.

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If the UE's transmit power is insufficient, the NodeB requests the RNC to reduce the target RoT.

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If the UE's transmit power is sufficient, the NodeB determines whether the current cell load exceeds the threshold.

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If yes, the NodeB requests the RNC to increase the target RoT.

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If no, no action is performed.

The RNC determines whether the transmit power of an R99 UE power is insufficient.

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If yes, the RNC reduces the target RoT.

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If no, the RNC obeys the NodeB.

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Implementation Process (1) (RNC side) •

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The RNC periodically determines whether to adjust the target RoT (the period is determined b y TgtRoTAdjPeriod). ›

If the transmit power of an R99 UE is insufficient or UL Timeslot ISCP reported by the NodeB i s 0, the RNC reduces the target RoT. The decreasing step is TgtRoTDownAdjStep and the lo wer threshold is the target RoT corresponding to the uplink load MaxTargetUlLoadFactor.

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If the transmit power of all R99 UEs is sufficient and UL Timeslot ISCP reported by the NodeB is 1, the RNC increases the target RoT. The increasing step is TgtRoTUpAdjStep and the upp er threshold is the target RoT corresponding to the uplink load UpLimitForMaxULTgtLdFacto r.

The values of UL Timeslot ISCP are described as follows: ›

0: The NodeB suggests the RNC to reduce the target RoT.

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1: The NodeB suggests the RNC to increase the target RoT.

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2: The NodeB does not suggest the RNC to adjust the RoT.

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Implementation Process (2) (NodeB side) • When at least one HSUPA UE in a cell meets both the following requi rements, UL Timeslot ISCP is set to 0: › The transmit power is close to the maximum transmit power. › The throughput is low.

• When none of UEs meet the two requirements and the current RoT is close to the target RoT, UL Timeslot ISCP is set to 1. • When none of UEs meet the two requirements and the current RoT is not close to the target RoT, UL Timeslot ISCP is set to 2.

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Impact of Dynamic Target RoT Adjustment  Impact on equipment RNC and NodeB software configuration needs to be modified.  Impact on resource consumption More CEs and Iub interfaces are used.  Impact on networking None  Impact on network KPIs The call drop rate is slightly affected.

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Application Scenarios and Benefits Typical scenarios 1.

If the cell coverage is not restricted, the target RoT can be increased to improve the HSUPA throughput.

2.

If the cell coverage is restricted, the target RoT can be decreased to ensure that all UEs are covered.

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Feature Planning • The feature applies to all scenarios. • If the average uplink load is close to the target load, but the average cell throughput is low, the feature has been enabled to improve the cell thro ughput. • In other scenarios, the feature does not have any positive or negative i mpact.

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Version and License • Required versions: 

BSC6900: BSC6900 V900R014C00 or later

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M2000: iManager M2000-II V200R012 or later

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CME: WRAN CME V200R012 or later

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BTS: 3800/3900 series V100/200R014C00 or later

• License: Cell-level license for the RNC • Feature conflict: N/A • Required feature: WRFD-010612 HSUPA Introduction Package

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Feature Activation Networking planning: N/A RF planning: N/A Hardware planning: • The BTS3812E, BTS3812A, and BTS3812AE must be configured with the EBBI, EBOI, EULP, or EULPd. • The DBS3800 must be configured with the EBBC or EBBCd. • The 3900 series base stations must be configured with the WBBPb, WBBPd, or WBBPf.

Data planning: N/A Acceptance planning: N/A HUAWEI TECHNOLOGIES CO., LTD. HISILICON SEMICONDUCTOR

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Requirements  Deployment requirement: None  Data preparation: see slide 19.  Precaution: None  Hardware:  The BTS3812E, BTS3812A, and BTS3812AE must be configured with the EBBI, EBOI, EULP, or EULPd. •

The DBS3800 must be configured with the EBBC or EBBCd.  The 3900 series base stations must be configured with the WBBPb, WBBPd, or WBBPf.

 Activation/initial configuration: see slide 20.  Feature Verification: see slide 20.  Feature adjustment: N/A

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Data Preparation • Configure the following parameters:  DynTgtRoTCtrlSwitch  TgtRoTAdjPeriod  TgtRoTUpAdjStep  TgtRoTDownAdjStep  UpLimitForMaxULTgtLdFactor

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Feature Activation, Initial Configuration & Verification •

Perform the following steps to initially configure this feature: ›

Step 1: Prepare boards required by the RNC and NodeB, and configure the core network.

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Step 2: Prepare software of RAN14 or later that passed the GA (for the RNC and NodeB).

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Step 3: Obtain and activate the license for the Dynamic Target RoT Adjustment feature.

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Step 4: Enable HSUPA cells.

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Step 5: Configure required devices to be the same as those for common HSUPA services.

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Step 6: Configure transmission to be the same as that for common HSUPA services.

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Step 7: Configure the switch. (Upgrade the NodeB to RAN 14, and then run the following command to turn on the switc h on the RNC:

MOD UCELLHSUPA: CellId=xx, DynTgtRoTCtrlSwitch=ON;)

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Perform the following steps to verify this feature: ›

If the common measurement UL Timeslot ISCP is successfully initialized at the Iub interface, Dynamic Target RoT Adjus tment has been enabled.

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Performance Monitoring • Monitor the VS.HSUPA.MeanBitRate.WithData counter on the NodeB to check the cell throughput, CS call drop rate, and PS call drop rate. Determine the call drop rate changes based on this data to check the running of the Dynamic Target RoT Adjustment feature. • If the value of VS.HSUPA.MeanBitRate.WithData slightly increases, and the CS and PS call drop rates basically remain unchanged, this feature is running properly.

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Parameters and Traffic Measurement Counters The following customized parameters have been added. List parameters, definition, value range, default values, MML commands, and usage range. List counters and their definitions. ID

Name

Description

DynTgtRoTCtrlSwitch

Switch for Dynamically Adjusting RoT

Specifies whether to enable Dynamic Target RoT Adjustment.

OFF, ON

TgtRoTAdjPeriod

Interval for Deciding Whether to Adjust RoT

Indicates the interval for the RNC to determine whether to adjust the target RoT.

2 to 10

TgtRoTUpAdjStep

Step for Increasing RoT

Specifies the step for increasing the target RoT.

1 to 100

TgtRoTDownAdjStep

Step for decreasing the RoT

Specifies the step for decreasing the target RoT. Specifies the upper limit for the maximum uplink load factor. RoT = –10 x log10(1 – Uplink load factor)

Upper Limit for the UpLimitForMaxULTgtLdFac Maximum Uplink Load tor Factor

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Recommended Value

Range

MML

Level

ADD/MOD UCELLHSUPA

Cell

ADD/MOD UCELLHSUPA

Cell

10 (1dB)

ADD/MOD UCELLHSUPA

Cell

1 to 100

20 (2dB)

ADD/MOD UCELLHSUPA

Cell

0 to 100

90 (90%)

ADD/MOD UCELLHSUPA

Cell

ON 5 (5s)

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Trial Verification   After activating Dynamic Target ROT for all sites in RNCSH1, On the M2000, both counters V S.HSUPA.TgtRoTInc or VS.HSUPA.TgtRoTDec are counted, this is indication that feature has b een activated and confirming ROT is working fine.  

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Trial OSS Kpi’s : •Dynamic Target ROT adjustment feature was activated on 19th Dec in RNCSH1. HSUPA Throughput is slightly improved in RNCSH1.

Time

HSUPA Payload (MB)_HW1 CSSR-Voice_HW SHO Succ. Rate_HW CSSR-Rel99(PS Succ RateR99)_HW1 CSSR-HSPA(PS Succ Rate HSDPA)_HW Cell Change _HW VS.HSDPA.RAB.AttEstab VS.MeanRTWP(dBm) HSUPA throughput (Kbps)

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Pre(Overall) 12-18th(Dec)

Post (Overall) 21-25th(Dec)

6484040.63 5 99.8424 99.9841

6730647.41 5 99.6865 99.9833

-0.16% 0.00%

99.5785

99.5264

-0.05%

99.7753

99.7101

-0.07%

99.8625 26432767 -101.825 37.3409

99.8614 26502205 -101.6937 38.6463

0.00% 0.26% -0.13% 3.50%

Difference % 3.80%

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