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Vladimir Rolbin vrolbin at gmail.comHi, My set is openbts-p2.8-gprs-exp/osmo-pcu-jolly. I encounter the problem with PACCH downlink assignment: If the difference between FNs of DL_PACKET_DOWNLINK_ASSIGNMENT and corresponding UL_PACKET_CONTROL_ACKNOWLEDGEMENT is expected (RRBP = 0) 13 everything is OK (OpenBTS log): 1347379490.099008 3031505776: [ PCU -> BTS ] PACCH FN 2536893 FN52 21 CNTRL1 raw=(4f0800000c03400a0800802b2b2b2b2b2b2b2b2b2b2b2b) DL_PACKET_DOWNLINK_ASSIGNMENT 1347379490.118500 3063704432: [ BTS -> PCU ] PhDataInd: FN 2536885 FN52 13 DATA raw=(100101cc741f3203c005650000014500003c00010000ff) 1347379490.136108 3063704432: [ BTS -> PCU ] PhDataInd: FN 2536889 FN52 17 DATA raw=(080105cc741f3228e2a8c8aa0100000100000000000003) 1347379490.154624 3063704432: [ BTS -> PCU ] PhDataInd: FN 2536893 FN52 21 DATA raw=(040107cc741f32777777066b616e6e656c036f72670000) 1347379490.215582 3063704432: [ BTS -> PCU ] PhDataInd: FN 2536906 FN52 34 CNTRL1 raw=(400731d07ccb2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b)UL_PACKET_CONTROL_ACKNOWLEDGEMENT But it's not always the case 1349788219.582282 3043367792: [ PCU -> BTS ] PACCH FN 2189728 FN52 8 CNTRL1 raw=(4f0800000c02800a0d00802b2b2b2b2b2b2b2b2b2b2b2b) DL_PACKET_DOWNLINK_ASSIGNMENT 1349788219.601978 3064179568: [ BTS -> PCU ] PhDataInd: FN 2189720 FN52 0 DATA raw=(040103ae3558373751f40103e800101773022a85464200) 1349788219.620378 3064179568: [ BTS -> PCU ] PhDataInd: FN 2189724 FN52 4 DATA raw=(0001042dae355837026a4e0432100000258ccc2b2b2b2b) 1349788219.638881 3064179568: [ BTS -> PCU ] PhDataInd: FN 2189728 FN52 8 DATA raw=(040103ae3558373751f40103e800101773022a85464200) 1349788219.680973 3064179568: [ BTS -> PCU ] PhDataInd: FN 2189737 FN52 17 CNTRL1 raw=(4006b8d560df2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b) UL_PACKET_CONTROL_ACKNOWLEDGEMENT diff FN = 9, that causes the following behaviour in pcu: <0002> gprs_rlcmac_data.cpp:1753 TBF: START TFI: 0 TLLI: 0xae355837 Packet Downlink Assignment (PACCH) <0004> gprs_rlcmac_data.cpp:1442 Complete DL frame for TBF=0: len=9 <0002> gprs_rlcmac_data.cpp:281 PACKET CONTROL ACK with unknown FN=2163607 TLL=0xae355837 (TRX 0 TS 7) <0002> gprs_rlcmac_data.cpp:100 Poll timeout for UL TBF=0 <0002> gprs_rlcmac_data.cpp:107 - Timeout for polling PACKET CONTROL ACK for PACKET UPLINK ACK Any ideas? Is it the known issue? Regards, Vladimir Rolbin -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/osmocom-net-gprs/attachments/20121009/e8d46506/attachment.htm>