Dynamic target ROT Adjustment.pptx

(1)

HUAWEI TECHNOLOGIES CO., LTD.

Introduction to the RAN14.0 Fe

ature Dynamic Target RoT Adju

stment

(2)

HISILICON SEMICONDUCTORHUAWEI TECHNOLOGIES CO., LTD. Page 2

Page2

Training Objects

• After this training, you are supposed to:

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

› Understand the feature specifications. › Explain basic principles of the feature.

(3)

Page3

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.

(4)

Functions

Page4

• 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.

 If the UE's transmit power is insufficient, the NodeB requests the RNC to reduce the target RoT.  If the UE's transmit power is sufficient, the NodeB determines whether the current cell load

exceeds the threshold.

 If yes, the NodeB requests the RNC to increase the target RoT.  If no, no action is performed.

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

 _{If yes, the RNC reduces the target RoT.}  If no, the RNC obeys the NodeB.

(5)

HISILICON SEMICONDUCTORHUAWEI TECHNOLOGIES CO., LTD. Page 5_{Page 5}

Implementation Process (1)

(RNC side)

• 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. › 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. › 1: The NodeB suggests the RNC to increase the target RoT. › 2: The NodeB does not suggest the RNC to adjust the RoT.

(6)

HISILICON SEMICONDUCTORHUAWEI TECHNOLOGIES CO., LTD. Page 6_{Page 6}

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}

(7)

(8)

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.

(9)

Page9

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.

(10)

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.

(11)

Page11

Version and License

• Required versions:

 BSC6900: BSC6900 V900R014C00 or later  M2000: iManager M2000-II V200R012 or later  CME: WRAN CME V200R012 or later

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

• License: Cell-level license for the RNC

• Feature conflict: N/A

(12)

Page12

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

(13)

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}

(14)

Data Preparation

• Configure the following parameters:



_{DynTgtRoTCtrlSwitch}



_{TgtRoTAdjPeriod}



_{TgtRoTUpAdjStep}



TgtRoTDownAdjStep



UpLimitForMaxULTgtLdFactor

Page14

(15)

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. › Step 2: Prepare software of RAN14 or later that passed the GA (for the RNC and NodeB). › Step 3: Obtain and activate the license for the Dynamic Target RoT Adjustment feature. › Step 4: Enable HSUPA cells.

› Step 5: Configure required devices to be the same as those for common HSUPA services. › Step 6: Configure transmission to be the same as that for common HSUPA services.

› 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;)

• 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.

(16)

Page16

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.

(17)

Page17

Parameters and Traffic Measurement Counters

List parameters, definition, value range, default values, MML commands, and

usage range.

List counters and their definitions.

ID Name Description Range Recommended _Value MML Level

DynTgtRoTCtrlSwitch Switch for Dynamically _{Adjusting RoT} Specifies whether to enable Dynamic _{Target RoT Adjustment.} OFF, ON ON ADD/MOD _UCELLHSUPA Cell

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 5 (5s) ADD/MOD _UCELLHSUPA Cell TgtRoTUpAdjStep Step for Increasing RoT Specifies the step for increasing the _{target RoT.} 1 to 100 10 (1dB) ADD/MOD _UCELLHSUPA Cell TgtRoTDownAdjStep Step for decreasing the RoT Specifies the step for decreasing the _{target RoT.} 1 to 100 20 (2dB) ADD/MOD _UCELLHSUPA Cell UpLimitForMaxULTgtLdFac

tor

Upper Limit for the Maximum Uplink Load Factor

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

0 to 100 90 (90%) ADD/MOD _UCELLHSUPA Cell

(18)

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.

(19)

Trial OSS Kpi’s :

Pre(Overall) Post (Overall)

Time 12-18th(Dec) 21-25th(Dec) Difference %

HSUPA Payload (MB)_HW1 6484040.63₅ 6730647.41₅ 3.80%

CSSR-Voice_HW 99.8424 99.6865 -0.16%

SHO Succ. Rate_HW 99.9841 99.9833 0.00%

CSSR-Rel99(PS Succ

Rate-R99)_HW1 99.5785 99.5264 -0.05% CSSR-HSPA(PS Succ Rate

HSDPA)_HW 99.7753 99.7101 -0.07% Cell Change _HW 99.8625 99.8614 0.00%

VS.HSDPA.RAB.AttEstab 26432767 26502205 0.26%

VS.MeanRTWP(dBm) -101.825 -101.6937 -0.13%

HSUPA throughput (Kbps) 37.3409 38.6463 3.50%

•Dynamic Target ROT adjustment feature was activated on 19th_{Dec in RNCSH1.}