ANR Delete Optimization

LTE Jabo ANR Strategy Activities ANR OPTIMIZATION HUAWEI TECHNOLOGIES CO., LTD.

Quick Summary Objective: To optimize ANR function Parameter Setting: DelCellThd=20, NcellHoStatNum=100; NRTDELMODE=EUTRAN_DELREDUNDANCENCELL-1; StatisticPeriodForNRTDel=2880; NcellHoForNRTDelThd=10; EventANRMode=NOT_BASED_NCL;

Jabo Implementation : 14th September 2015 total of 455 eNodeBs with 1359cells

KPI & Trial Results: •Main KPIs maintain •ANR Auto Delete function optimized

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Optimize ANR Delete Function Green Text : Current Value Brown Text : Value to be Changed

ANR Auto NRT Delete Function

Inappropriate neighbor

Priority Based (when neighbor is max)

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Switch : IntraRatAnrAutoDel Switch of EnodebAlgoSwitch.AnrSwitch (ON)

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ANR.StatisticPeriodforNRTDel (10080mins=1week) --- (2880mins=2days)

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IF total number of cell-to-cell attempt > ANR.NcellHoStatNum (200) --- (100) & HOSR ANR.StatisticNumForNRTDel (200) IN 4*ANR.StatisticPeriodForNRTDel (10080mins=1week*4) --- (2880mins=2day*4)

+++++ Change EventAnrMode : BASED_NCL ---- (NOT_BASED_NCL) Intra-RAT event-triggered ANR adds a neighbor relationship to an NRT based on the CGI reported from the UE but not based on the NCL defined earlier.

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ANR Delete Optimization Result ANR Auto Delete Optimization is currently working fine. From ANR log, it is found that ANR delete more cells than before. Furthermore, failure of adding neighbor relationship reduced. Previously some neighbor fail to be added in neighbor list due to the source cell having maximum configuration of neighbor (256 neighbors). Currently, there are only 3cells having maximum configuration of neighbor which is much more lesser compare to 8 th September where there are total of 28cells. Date 9/8/2015 9/25/2015

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Jabo Total Neighbor Count Cell having maximum configuration of neighbor 126396 28cells = 256 neighbors 116954 3cells = 256 neighbors

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ANR Delete Optimization - Punishment However, it is found that there is some neighbor relation has repeatedly add & delete. To avoid this to happen, ANR punishment mechanism can be used to reduce the scenario. Neighbor relationship which deleted by ANR will be put in monitoring list. If within 1440mins the HO request > 100, the neighbor will be added back in NRT, else it will remain in monitoring list and not to be added. By this repeatedly add&delete neighbors scenario can be minimized and limit ANR to only add necessary neighbor. Parameter

MML

Neighbor Cell Deletion Punish Period (ENBRSVDPARA)

EUTRAN Neighbor Cell Deletion Punish Number (ENBRSVDPARA)

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Description

Values

RsvdPara25

Indicates the penalty statistics period during which a deleted neighbor relationship with an E-UTRAN or UTRAN cell can be added to the neighboring relation table (NRT) again if the number of times neighboring EUTRAN or UTRAN cell addition is triggered is greater than or equal to the value of the EutranNcellDelPunNum.

1440

RsvdPara26

Indicates the number of times penalty statistics about neighboring E-UTRAN cell deletion are collected. When a neighbor relationship with an E-UTRAN cell is deleted, it can be added to the NRT again if the number of times neighboring E-UTRAN cell addition is triggered is greater than or equal to the value of this parameter.

100

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