No subject

Ivan Kluchnikov Ivan.Kluchnikov at fairwaves.ru
Wed Oct 10 16:13:10 UTC 2012


Hi, Vladimir!


Hi, Vladimir!

I haven't any problems with downlink assignment and
PACKET_UPLINK_ACK_NACK now, but I will check it.
Please, check, have you applied this patch?
https://github.com/chemeris/openbts-p2.8/commit/bfa47ccfa26ab30b0232584ac67f6b195644329a


2012/10/10 Vladimir Rolbin <vrolbin at gmail.com>:
> Similar problem with DL_PACKET_UPLINK_ACK_NACK..., now logs are
> synchronized:
>
> BTS:
>
> 1349870962.242903 3064806256: [ BTS -> PCU ] PhDataInd: FN 2543233 FN52 17
> DATA raw=(0401018aae8c0f01c0050816083a853907018754033d89)
> 1349870962.261436 3064806256: [ BTS -> PCU ] PhDataInd: FN 2543237 FN52 21
> DATA raw=(000102058aae8c0f1b2b2b2b2b2b2b2b2b2b2b2b2b2b2b)
> 1349870962.262173 3042884464: [ PCU -> BTS ] PCH: L2Length 11
> primitive=UNIT_DATA raw=(063f300f40027d6ba40000d8aae8c0f81a022b2b2b2b)
> 1349870962.262261 3042884464: [ BTS -> PCU ] PhPchCnf:
> 2d063f300f40027d6ba40000d8aae8c0f81a022b2b2b2b
> 1349870962.263013 3042884464: [ PCU -> BTS ] PACCH FN 2543250 FN52 34 CNTRL1
> raw=(4f2400208000000000000000f155d181e02b2b2b2b2b2b)
> DL_PACKET_UPLINK_ACK_NACK
> 1349870962.283385 3064806256: [ BTS -> PCU ] PhDataInd: FN 2543242 FN52 26
> DATA raw=(0401018aae8c0f01c0050816083a853907018754033d89)
> 1349870962.302008 3064806256: [ BTS -> PCU ] PhDataInd: FN 2543246 FN52 30
> DATA raw=(000102058aae8c0f1b2b2b2b2b2b2b2b2b2b2b2b2b2b2b)
> 1349870962.320769 3064806256: [ BTS -> PCU ] PhDataInd: FN 2543250 FN52 34
> DATA raw=(0401018aae8c0f01c0050816083a853907018754033d89)
> 1349870962.362534 3064806256: [ BTS -> PCU ] PhDataInd: FN 2543259 FN52 43
> CNTRL1 raw=(40062aba303f2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b2b)
> UL_PACKET_CONTROL_ACKNOWLEDGEMENT
> 1349870962.480042 3042884464: [ PCU -> BTS ] PDTCH: FN 2543298 FN52 30 DATA
> raw=(0f01002541c001081501ff6cba2b2b2b2b2b2b2b2b2b2b)
>
> PCU:
>
> <0005> gprs_rlcmac_data.cpp:880 Decoded premier TLLI=0x8aae8c0f of UL DATA
> TBF=0.
> <0005> gprs_rlcmac_data.cpp:743 Complete UL frame for TBF=0: len=17
> <0008> gprs_rlcmac.cpp:1760 LLC [PCU -> SGSN] TFI: 0 TLLI: 0x8aae8c0f len=17
> <0008> gprs_bssgp_pcu.cpp:145 LLC [SGSN -> PCU] = TLLI: 0x8aae8c0f IMSI: 000
> len: 9
> <0002> gprs_rlcmac.cpp:354 Allocating DL TBF: TFI=0 TRX=0 MS_CLASS=10
> <0002> gprs_rlcmac.cpp:948 - Setting Control TS 7
> <0002> gprs_rlcmac_data.cpp:1804 TX: START TFI: 0 TLLI: 0x8aae8c0f Immediate
> Assignment Downlink (PCH)
> <0002> gprs_rlcmac_data.cpp:281 PACKET CONTROL ACK with unknown FN=2543259
> TLL=0x8aae8c0f (TRX 0 TS 7)
> <0002> gprs_rlcmac.cpp:895 Free UL TBF=0 with TLLI=0x8aae8c0f.
> <0004> gprs_rlcmac_data.cpp:1456 Complete DL frame for TBF=0: len=9
> <0002> gprs_rlcmac.cpp:895 Free DL TBF=0 with TLLI=0x8aae8c0f.
> <0008> gprs_bssgp_pcu.cpp:145 LLC [SGSN -> PCU] = TLLI: 0x8aae8c0f IMSI: 000
> len: 9
> <0002> gprs_rlcmac.cpp:354 Allocating DL TBF: TFI=0 TRX=0 MS_CLASS=10
> <0002> gprs_rlcmac.cpp:948 - Setting Control TS 7
> <0002> gprs_rlcmac_data.cpp:1804 TX: START TFI: 0 TLLI: 0x8aae8c0f Immediate
> Assignment Downlink (PCH)
> <0004> gprs_rlcmac_data.cpp:1456 Complete DL frame for TBF=0: len=9
> <0002> gprs_rlcmac.cpp:895 Free DL TBF=0 with TLLI=0x8aae8c0f.
>
> ...
>
>
>
> From: Vladimir Rolbin [mailto:vrolbin at gmail.com]
> Sent: Tuesday, October 09, 2012 5:17 PM
> To: osmocom-pcu at lists.osmocom.org; openbts-discuss at lists.sourceforge.net
> Subject: [Openbts-discuss] gprs PACCH downlink assignment problem
>
>
>
> Hi,
>
>
>
> 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
>
>



-- 
Regards,
Ivan Kluchnikov.
http://fairwaves.ru




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