all cells (serving and neighbors) are in the same band, the same layer and not congested.
the serving cell :
BCCH: 5, BSIC: 22
RxLev Sub: -89 dBm, RxQual Sub: 7
the HO command msg:
“003163 13:36:50.641 L3 DL RR Handover Command
Cell ID: 23392, BCCH: 5, BSIC: 22, LAC: 34, Mode: Dedicated, TimeSlot: 6, MAIO: 3, Hopping Flag: 1, HSN: 15, Link: Down, Type: RR, Logical Channel: FACCH, TI/SI: 0, Primitive: 6, IEI Message: 65535, IEI: 1579, TDMA Frame Number: 325576
BCCH: 8 BSIC: 15(dec) 17(oct)
Channel Type: TCH/H + ACCHs, Subchannel 0
TimeSlot: 5 TrainingSeq: 7
Hopping: Yes, MAIO: 3 HoppingSeq (HSN): 14
HandoverRef: 2 OrderedPowerLevel: 5
Target CA List: 8 34 49 59 (Range 128)
Channel Mode: Speech full rate or half rate version 1 (GSM FR/HR)”
the HO fail msg:
“003173 13:36:51.234 L3 UL RR Handover Failure
Cell ID: 23392, BCCH: 5, BSIC: 22, LAC: 34, Mode: Dedicated, TimeSlot: 6, MAIO: 3, Hopping Flag: 1, HSN: 15, Link: Up, Type: RR, Logical Channel: FACCH, TI/SI: 0, Primitive: 6, IEI Message: 65535, IEI: 1576, TDMA Frame Number: 325684
Abnormal release, unspecified (Hex 01)”
TCH frequencies of chozen neighbor :
34 ; 49 ; 59