AW: random net disconn. - o2 germany - motorola c123 + c140

Stefan Bauer stefan.bauer at cubewerk.de
Mon Jan 9 11:29:27 UTC 2012


-----Ursprüngliche Nachricht-----
Von:	Stefan Bauer <stefan.bauer at cubewerk.de>
> I moved closer to the cell. I got associated to the cell with much better 
> quality. Then the channel switch was initiated by the software - without luck - 
> logs attached:

I tested another provider. This time Vodafone. The rx-quality is even better:
(my cell #33 is -64)

<0004> gsm322.c:4783 Measurement result for ARFCN 16: -95
<0004> gsm322.c:4783 Measurement result for ARFCN 20: -93
<0004> gsm322.c:4783 Measurement result for ARFCN 21: -96
<0004> gsm322.c:4783 Measurement result for ARFCN 22: -92
<0004> gsm322.c:4783 Measurement result for ARFCN 25: -92
<0004> gsm322.c:4783 Measurement result for ARFCN 33: -64
<0004> gsm322.c:4783 Measurement result for ARFCN 34: -84
<0004> gsm322.c:4783 Measurement result for ARFCN 43: -87
<0004> gsm322.c:4783 Measurement result for ARFCN 44: -86
<0004> gsm322.c:4783 Measurement result for ARFCN 48: -81
<0004> gsm322.c:4783 Measurement result for ARFCN 49: -94
<0004> gsm322.c:4783 Measurement result for ARFCN 82: -94
<0004> gsm322.c:4783 Measurement result for ARFCN 86: -74
<0004> gsm322.c:4783 Measurement result for ARFCN 87: -93
<0004> gsm322.c:4783 Measurement result for ARFCN 88: -92
<0004> gsm322.c:4783 Measurement result for ARFCN 95: -92
<0004> gsm322.c:4783 Measurement result for ARFCN 123: -84
<0004> gsm322.c:4783 Measurement result for ARFCN 124: -79
<0004> gsm322.c:4691 RLA_C of serving cell: -55
<0004> gsm322.c:374 A (RLA_C (-55) - RXLEV_ACC_MIN (-106)) = 51
<0004> gsm322.c:376 B (MS_TXPWR_MAX_CCH (33) - p (33)) = 0
<0004> gsm322.c:377 C1 (A - MAX(B,0)) = 51
<0004> gsm322.c:400 C2 = C1 - CELL_RESELECT_OFFSET (0) = 51 (special case)
<0004> gsm322.c:4746 #1 ARFCN=33 RLA_C=-64
<0004> gsm322.c:4746 #2 ARFCN=86 RLA_C=-75
<0004> gsm322.c:4746 #3 ARFCN=124 RLA_C=-80
<0004> gsm322.c:4746 #4 ARFCN=48 RLA_C=-82
<0004> gsm322.c:4746 #5 ARFCN=123 RLA_C=-82
<0004> gsm322.c:4746 #6 ARFCN=34 RLA_C=-83
<0004> gsm322.c:4569 Syncing to new neighbour cell 33.


For unknown reasons, the sync fails again:

<0003> gsm322.c:469 Sync to ARFCN=33 rxlev=-68 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2937 Channel synched. (ARFCN=33, snr=16, BSIC=25)
<0001> gsm322.c:2958 using DSC of 90
<0004> gsm322.c:4640 Synced to neighbour cell 33.
<0003> gsm322.c:692 Starting CS timer with 2 seconds.
<0003> gsm48_rr.c:4941 Channel provides data.
<0001> gsm48_rr.c:1887 New SYSTEM INFORMATION 2
<0001> sysinfo.c:719 New SYSTEM INFORMATION 3 (mcc 262 mnc 01 lac 0x430a)
<0001> gsm48_rr.c:2012 Changing CCCH_MODE to 1
<0003> gsm322.c:702 stopping pending CS timer.
<0003> gsm322.c:2567 Relevant sysinfo of neighbour cell is now received or updated.
<0004> gsm322.c:4661 Read from neighbour cell 33 (rxlev -68).
<0004> gsm322.c:4569 Syncing to new neighbour cell 86.
<0003> gsm322.c:469 Sync to ARFCN=86 rxlev=-78 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2980 Channel sync error, try again
<0003> gsm322.c:469 Sync to ARFCN=86 rxlev=-78 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2993 Channel sync error.
<0003> gsm322.c:2998 free sysinfo ARFCN=86
<0004> gsm322.c:4640 Failed to sync to neighbour cell 86.
<0004> gsm322.c:4569 Syncing to new neighbour cell 124.
<0003> gsm322.c:469 Sync to ARFCN=124 rxlev=-83 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2980 Channel sync error, try again
<0003> gsm322.c:469 Sync to ARFCN=124 rxlev=-83 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2993 Channel sync error.
<0003> gsm322.c:2998 free sysinfo ARFCN=124
<0004> gsm322.c:4640 Failed to sync to neighbour cell 124.
<0004> gsm322.c:4569 Syncing to new neighbour cell 48.
<0003> gsm322.c:469 Sync to ARFCN=48 rxlev=-83 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2980 Channel sync error, try again
<0003> gsm322.c:469 Sync to ARFCN=48 rxlev=-83 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2993 Channel sync error.
<0003> gsm322.c:2998 free sysinfo ARFCN=48
<0004> gsm322.c:4640 Failed to sync to neighbour cell 48.
<0004> gsm322.c:4569 Syncing to new neighbour cell 123.
<0003> gsm322.c:469 Sync to ARFCN=123 rxlev=-85 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2980 Channel sync error, try again
<0003> gsm322.c:469 Sync to ARFCN=123 rxlev=-85 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2993 Channel sync error.
<0003> gsm322.c:2998 free sysinfo ARFCN=123
<0004> gsm322.c:4640 Failed to sync to neighbour cell 123.
<0004> gsm322.c:4569 Syncing to new neighbour cell 34.
<0003> gsm322.c:469 Sync to ARFCN=34 rxlev=-86 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2980 Channel sync error, try again
<0003> gsm322.c:469 Sync to ARFCN=34 rxlev=-86 (No sysinfo yet, ccch mode NONE)
<0003> gsm322.c:2993 Channel sync error.
<0003> gsm322.c:2998 free sysinfo ARFCN=34
<0004> gsm322.c:4640 Failed to sync to neighbour cell 34.
<0004> gsm322.c:4122 Re-select using access class with Emergency class.
<0004> gsm322.c:4142 Checking cell of ARFCN 33 for cell re-selection.
<0004> gsm322.c:374 A (RLA_C (-64) - RXLEV_ACC_MIN (-106)) = 42
<0004> gsm322.c:376 B (MS_TXPWR_MAX_CCH (33) - p (33)) = 0
<0004> gsm322.c:377 C1 (A - MAX(B,0)) = 42
<0004> gsm322.c:400 C2 = C1 - CELL_RESELECT_OFFSET (0) = 42 (special case)
<0004> gsm322.c:4198 -> Cell of is in the same LA, so CRH = 0
<0004> gsm322.c:4142 Checking cell of ARFCN 86 for cell re-selection.
<0004> gsm322.c:4164 Skip cell: There are no system informations available.
<0004> gsm322.c:4142 Checking cell of ARFCN 124 for cell re-selection.
<0004> gsm322.c:4164 Skip cell: There are no system informations available.
<0004> gsm322.c:4142 Checking cell of ARFCN 48 for cell re-selection.
<0004> gsm322.c:4164 Skip cell: There are no system informations available.
<0004> gsm322.c:4142 Checking cell of ARFCN 123 for cell re-selection.
<0004> gsm322.c:4164 Skip cell: There are no system informations available.
<0004> gsm322.c:4142 Checking cell of ARFCN 34 for cell re-selection.
<0004> gsm322.c:4164 Skip cell: There are no system informations available.
<0004> gsm322.c:4624 Syncing back to serving cell
<0003> gsm322.c:463 Sync to ARFCN=46 rxlev=-56 (Sysinfo, ccch mode NON-COMB)
<0001> gsm48_rr.c:679 MON: no cell info
<0003> gsm322.c:2980 Channel sync error, try again
<0003> gsm322.c:463 Sync to ARFCN=46 rxlev=-56 (Sysinfo, ccch mode NON-COMB)
<0003> gsm322.c:2980 Channel sync error, try again
<0003> gsm322.c:463 Sync to ARFCN=46 rxlev=-56 (Sysinfo, ccch mode NON-COMB)
<0003> gsm322.c:2993 Channel sync error.
<0003> gsm322.c:2998 free sysinfo ARFCN=46
<0003> gsm322.c:3005 Unselect cell due to sync error!
<0003> gsm322.c:498 Unselecting serving cell.
<0003> gsm322.c:3072 Loss of CCCH, Trigger re-selection.
<0003> gsm322.c:4035 (ms 1) Event 'EVENT_CELL_RESEL' for Cell selection in state 'C7 camped on any cell'
<0003> gsm322.c:823 new state 'C7 camped on any cell' -> 'C8 any cell re-selection'
<0003> gsm322.c:4334 Checking cell with ARFCN 33 for cell re-selection. (C2 = 42)
<0003> gsm322.c:4334 Checking cell with ARFCN 86 for cell re-selection. (C2 = 0)
<0003> gsm322.c:4345 Skip cell: not suitable and/or allowable.
<0003> gsm322.c:4334 Checking cell with ARFCN 124 for cell re-selection. (C2 = 0)
<0003> gsm322.c:4345 Skip cell: not suitable and/or allowable.
<0003> gsm322.c:4334 Checking cell with ARFCN 48 for cell re-selection. (C2 = 0)
<0003> gsm322.c:4345 Skip cell: not suitable and/or allowable.
<0003> gsm322.c:4334 Checking cell with ARFCN 123 for cell re-selection. (C2 = 0)
<0003> gsm322.c:4345 Skip cell: not suitable and/or allowable.
<0003> gsm322.c:4334 Checking cell with ARFCN 34 for cell re-selection. (C2 = 0)
<0003> gsm322.c:4345 Skip cell: not suitable and/or allowable.
<0003> gsm322.c:4372 Best neighbour cell with ARFCN 33 selected. (normal priority)
<0003> gsm322.c:4405 Scanning ARFCN 33 of neighbour cell during cell reselection.
<0003> gsm322.c:469 Sync to ARFCN=33 rxlev=-68 (No sysinfo yet, ccch mode NONE)
<0005> gsm48_mm.c:4329 (ms 1) Received 'MM_EVENT_LOST_COVERAGE' event in state MM IDLE, limited service
<0005> gsm48_mm.c:1059 Selecting PLMN SEARCH state, because no cell selected.
<0005> gsm48_mm.c:912 new MM IDLE state limited service -> PLMN search


Is it possible, that i miss an important part in my setup? To be honest, i followed quite strictly all the informations in the public wiki.


Stefan




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