HO ParameterParameter IDParameter NameNEMML CommandMeaningFeature IDFeature NameValue TypeGUI Value RangeActual Value RangeUnitDefault ValueRecommended ValueImpactParameter RelationshipAccessService Interrupted After ModificationInterruption ScopeInterruption Duration(Min)CautionValidation of ModificationImpact on Radio Network PerformanceIntroduced in VersionAttributeDLEDGETHRESEdge HO DL RX_LEV ThresholdBSC6900SET GCELLHOBASIC(Optional)Threshold for downlink edge handover. If the downlink receive level remains less than this threshold for a period of time, the edge handover is triggered. If the PBGT handover algorithm is enabled, this threshold can be decreased accordingly. If the PBGT handover algorithm is disabled, over-coverage, co-channel interference, and adjacent channel interference may occur when this threshold is set improperly. In addition, to ensure uplink-downlink balance, this threshold needs to be adjusted according to the handover performance statistics and actual network performance.GBFD-110601GBFD-510501HUAWEI I HandoverHUAWEI II HandoverInterval Type0~630~63dB20The recommended value is 20 when HUAWEI I Handover is used;The recommended value is 15 when HUAWEI II Handover is used.CellThis parameter is valid when "FRINGEHOEN" is set to YES or "LOADHOEN" is set to YES.Read & WriteN (No impact on the UE in idle mode)Not involvedNot involvedNoneThe parameter modification has no impact on the equipment.If this parameter is set to a smaller value, call drops may occur due to delayed handover; if this parameter is set to a greater value, unnecessary handover may be performed, thus affecting the voice quality.Versions earlier than BSC6900 V900R011RadioHOCDCMINDWPWRMin DL Level on Candidate CellBSC6900SET GCELLHOBASIC(Optional)If the downlink received signal level of a neighbor cell is greater than "Min DL Level on Candidate Cell" plus "Min Access Level Offset", the neighbor cell can be listed in the candidate cell queue for handover.GBFD-110601GBFD-510501HUAWEI I HandoverHUAWEI II HandoverInterval Type0~630~63dB1010CellNoneRead & WriteN (No impact on the UE in idle mode)Not involvedNot involvedNoneThe parameter modification has no impact on the equipment.This parameter limits the number of candidate cells. If this parameter is set to a greater value, some desired cells may be excluded from the candidate cells and call drops may occur. If this parameter is set to a smaller value, an unwanted cell may become the candidate cell, thus leading to handover failures or call drops.Versions earlier than BSC6900 V900R011RadioHOCDCMINUPPWRMin UL Level on Candidate CellBSC6900SET GCELLHOBASIC(Optional)If the uplink received signal level of a neighbor cell is greater than "Min UL Level on Candidate Cell" plus "Min Access Level Offset", the neighbor cell can be listed in the candidate cell queue for handover.GBFD-110601GBFD-510501HUAWEI I HandoverHUAWEI II HandoverInterval Type0~630~63dB00CellNoneRead & WriteN (No impact on the UE in idle mode)Not involvedNot involvedNoneThe parameter modification has no impact on the equipment.This parameter limits the number of candidate cells. If this parameter is set to a greater value, some desired cells may be excluded from the candidate cells and call drops may occur. If this parameter is set to a smaller value, an unwanted cell may become the candidate cell, thus leading to handover failures or call drops.Versions earlier than BSC6900 V900R011RadioHOTHRESInter-layer HO ThresholdBSC6900ADD GEXT2GCELL(Optional)SET GCELLHOBASIC(Optional)Handover threshold during the handovers between cells on different layers or of different priorities. This value is used to suppress inter-layer ping-pong handovers. Inter-layer handover threshold of the serving cell = "Inter-layer HO threshold" - "Inter-layer HO Hysteresis"; Inter-layer handover threshold of a neighboring cell = "Inter-layer HO Threshold" + "Adjacent Cell Inter-layer HO Hysteresis" - 64.GBFD-110601GBFD-510501HUAWEI I HandoverHUAWEI II HandoverInterval Type0~630~63dB2525CellNoneRead & WriteN (No impact on the UE in idle mode)Not involvedNot involvedSet this parameter properly to ensure that hierarchical handover and load-based handover can function properly. During hierarchical handover and load-based handover, the downlink received level of the target cell must be greater than this threshold.The parameter modification has no impact on the equipment.NoneVersions earlier than BSC6900 V900R011RadioINTELEVHOHYSTAdjacent Cell Inter-layer HO HysteresisBSC6900ADD G2GNCELL(Optional)Hysteresis value during the handovers between cells on different layers or of different priorities. This value is used to suppress inter-layer ping-pong handovers.GBFD-110601GBFD-510501HUAWEI I HandoverHUAWEI II HandoverInterval Type0~1270~127dB6767CellInter-layer HO threshold of the serving cell = "Inter-layer HO threshold" - "Inter-layer HO Hysteresis".Inter-layer HO threshold of the neighboring cell = "Inter-layer HO threshold" + "Adjacent Cell Inter-layer HO Hysteresis" - 64.The value of "Inter-layer HO threshold" can be set through "SET GCELLHOBASIC".Read & WriteN (No impact on the UE in idle mode)Not involvedNot involvedNoneThe parameter modification has no impact on the equipment.NoneVersions earlier than BSC6900 V900R011RadioINTERCELLHYSTInter-cell HO HysteresisBSC6900ADD G2GNCELL(Optional)Reduces ping-pong handovers between cells on a same layer. This parameter is invalid when cells are on different layers.GBFD-110601GBFD-510501HUAWEI I HandoverHUAWEI II HandoverInterval Type0~1270~127dB68In densely populated urban areas, the recommended value is 68; in the suburbs, the recommended value is 72.CellWhen "Current HO Control Algorithm" in "SET GCELLHOBASIC" is set to HOALGORITHM1(Handover algorithm I), "Inter-cell HO Hysteresis" should be set within the range of 64-127. When "Current HO Control Algorithm" in "SET GCELLHOBASIC" is set to HOALGORITHM2(Handover algorithm II), "Inter-cell HO Hysteresis" should be set within the range of 0-127.Read & WriteN (No impact on the UE in idle mode)Not involvedNot involvedNoneThe parameter modification has no impact on the equipment.NoneVersions earlier than BSC6900 V900R011RadioMINOFFSETMin Access Level OffsetBSC6900ADD G2GNCELL(Optional)Minimum receive level offset.An MS can be handed over to a neighboring cell only when the downlink level of the neighboring cell is greater than the sum of "Min DL level on candidate Cell" and the value of this parameter.GBFD-110601GBFD-510501HUAWEI I HandoverHUAWEI II HandoverInterval Type0~630~63dB00CellThis parameter is based on "HOCDCMINDWPWR" and "HOCDCMINUPPWR". Different offset can be set for different neighboring cells. The following condition must be met for a neighboring cell to be added into the candidate cell queue: Neighboring cell uplink level >= ("HOCDCMINUPPWR" + "MINOFFSET"); Neighboring cell downlink level >= ("HOCDCMINDWPWR" + "MINOFFSET").Read & WriteN (No impact on the UE in idle mode)Not involvedNot involvedNoneThe parameter modification has no impact on the equipment.NoneVersions earlier than BSC6900 V900R011RadioPBGTMARGINPBGT HO ThresholdBSC6900ADD G2GNCELL(Optional)PBGT handovers to a neighboring cell are allowed only when the downlink level difference between the neighboring cell and the serving cell is larger than this parameter. When the value of this parameter is smaller than 64, handovers to a neighboring cell with a lower level than the current serving cell are allowed.GBFD-110601HUAWEI I HandoverInterval Type0~1270~127dB68In densely populated urban areas, the recommended value is 68; in the suburbs, the recommended value is 72.CellNoneRead & WriteN (No impact on the UE in idle mode)Not involvedNot involvedNoneThe parameter modification has no impact on the equipment.NoneVersions earlier than BSC6900 V900R011RadioULEDGETHRESEdge HO UL RX_LEV ThresholdBSC6900SET GCELLHOBASIC(Optional)If the UL receive level remains lower than the "Edge HO UL RX_LEV Threshold" for a period, the edge handover is triggered.GBFD-110601GBFD-510501HUAWEI I HandoverHUAWEI II HandoverInterval Type0~630~63dB1010CellThis parameter is valid when "FRINGEHOEN" is set to YES or "RXQCKFALLHOEN" is set to YES.Read & WriteN (No impact on the UE in idle mode)Not involvedNot involvedNoneThe parameter modification has no impact on the equipment.If this parameter is set to a smaller value, call drops may occur due to delayed handover; if this parameter is set to a greater value, unnecessary handover may be performed, thus affecting the voice quality.Versions earlier than BSC6900 V900R011Radio