No subject

Vladimir Rolbin vrolbin at gmail.com
Thu Oct 11 10:39:24 UTC 2012


Hi, Ivan

Yes, the patch is applied..
It's not so clear the role of the timers mT3101, mT3111 and mT3109 for
PDTCH channel.
If I see well when "AccessGrantResponder -> LCH = gBTS.getPDTCH();" the
same channel
is opened every time (it's never closed explicitly):

LogicalChannel::open(); -> L1FEC::open() -> mDecoder->open(); -> void
L1Decoder::open() ->
{
 ScopedLock lock(mLock);
 if (!mRunning) start();
 mFER=0.0F;
 mT3111.reset();
 mT3109.reset();
 mT3101.set();
 mActive = true;
}

handleGoodFrame function is overridden, so the channel stops to be active
here after mT3101 is elapsed:

void XCCHL1Decoder::writeLowSide(const RxBurst& inBurst)
{
 OBJLOG(DEBUG) <<"XCCHL1Decoder " << inBurst;
 // If the channel is closed, ignore the burst.
 if (!active()) {
  OBJLOG(DEBUG) <<"XCCHL1Decoder not active, ignoring input";
  return;
 }

...

}

Pls advice..

Regards,
Vladimir



On Wed, Oct 10, 2012 at 6:13 PM, Ivan Kluchnikov <
Ivan.Kluchnikov at fairwaves.ru> wrote:

> 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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