osmo-pcu always "T3193 timeout expired, freeing TBF" when osmo-sgsn send GPRS ATTACH ACCEPT

???? Tue, 27 Apr 2021 18:32:04 -0700

Hi All,


Here is the issue when use egprs with osmo-bts-trx,osmo-pcu and osmo-sgsn.
osmo-pcu debugging info as below:
<000c&gt; gprs_bssgp_pcu.cpp:168 LLC [SGSN -&gt; PCU] = TLLI: 0xaf8ce1ff IMSI: 
460000323182742 len: 26
<0008&gt; tbf.cpp:1068 Allocating DL TBF: MS_CLASS=12/12
<0008&gt; tbf.cpp:541 TBF(TFI=0 TLLI=0x00000000 DIR=DL STATE=NULL) Setting 
Control TS 6
<0008&gt; tbf.cpp:945 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=NULL) Allocated: 
trx = 0, ul_slots = 40, dl_slots = 40
<0008&gt; bts.cpp:898 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) TX: START 
Immediate Assignment Downlink (PCH)
<0008&gt; tbf_dl.cpp:520 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) set 
ass. type PACCH [prev CCCH:0, PACCH:0]
<0008&gt; tbf.cpp:1270 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) start 
Packet Downlink Assignment (PACCH)
<0009&gt; tbf.cpp:788 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) Scheduled 
DL Assignment polling on PACCH (FN=2402222, TS=6)
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402270, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402322, TS=6
<0008&gt; tbf.cpp:808 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) poll timeout 
for FN=2402322, TS=6 (curr FN 2402387)
<0008&gt; tbf.cpp:879 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Timeout for 
polling PACKET DOWNLINK ACK.
<0008&gt; tbf.cpp:1184 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Assignment 
was on PACCH
<0008&gt; tbf.cpp:1190 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Downlink 
ACK was received
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402426, TS=6
<0008&gt; tbf.cpp:989 Allocating UL TBF: MS_CLASS=12/12
<0008&gt; tbf.cpp:541 TBF(TFI=0 TLLI=0x00000000 DIR=UL STATE=NULL) Setting 
Control TS 6
<0008&gt; tbf.cpp:945 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=UL STATE=NULL) Allocated: 
trx = 0, ul_slots = 40, dl_slots = 00
<0008&gt; tbf.cpp:1359 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=UL STATE=ASSIGN) start 
Packet Uplink Assignment (PACCH)
<0009&gt; tbf.cpp:782 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled UL 
Assignment polling on PACCH (FN=2402478, TS=6)
<0007&gt; gprs_rlcmac_meas.cpp:184 DL Bandwitdh of IMSI=460000323182742 / 
TLLI=0xaf8ce1ff: 66 KBits/s
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402525, TS=6
<000c&gt; tbf_ul.cpp:404 LLC [PCU -&gt; SGSN] TBF(TFI=0 TLLI=0xaf8ce1ff DIR=UL 
STATE=FLOW) len=97
<000c&gt; gprs_bssgp_pcu.cpp:168 LLC [SGSN -&gt; PCU] = TLLI: 0xaf8ce1ff IMSI: 
460000323182742 len: 9
<0008&gt; tbf.cpp:808 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) poll timeout 
for FN=2402525, TS=6 (curr FN 2402586)
<0008&gt; tbf.cpp:879 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Timeout for 
polling PACKET DOWNLINK ACK.
<0008&gt; tbf.cpp:1184 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Assignment 
was on PACCH
<0008&gt; tbf.cpp:1190 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Downlink 
ACK was received
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402625, TS=6
<0007&gt; gprs_rlcmac_meas.cpp:106 UL RSSI of TLLI=0xaf8ce1ff: -31 dBm
<0008&gt; tbf.cpp:486 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=UL STATE=FINISHED) free
<0008&gt; tbf.cpp:989 Allocating UL TBF: MS_CLASS=12/12
<0008&gt; tbf.cpp:541 TBF(TFI=0 TLLI=0x00000000 DIR=UL STATE=NULL) Setting 
Control TS 6
<0008&gt; tbf.cpp:945 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=UL STATE=NULL) Allocated: 
trx = 0, ul_slots = 40, dl_slots = 00
<0008&gt; tbf.cpp:1359 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=UL STATE=ASSIGN) start 
Packet Uplink Assignment (PACCH)
<0009&gt; tbf.cpp:782 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled UL 
Assignment polling on PACCH (FN=2402673, TS=6)
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402720, TS=6
<000c&gt; tbf_ul.cpp:404 LLC [PCU -&gt; SGSN] TBF(TFI=0 TLLI=0xaf8ce1ff DIR=UL 
STATE=FLOW) len=17
<000c&gt; gprs_bssgp_pcu.cpp:168 LLC [SGSN -&gt; PCU] = TLLI: 0xaf8ce1ff IMSI: 
460000323182742 len: 26
<0007&gt; gprs_rlcmac_meas.cpp:184 DL Bandwitdh of IMSI=460000323182742 / 
TLLI=0xaf8ce1ff: 86 KBits/s
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402768, TS=6
<0007&gt; gprs_rlcmac_meas.cpp:106 UL RSSI of TLLI=0xaf8ce1ff: -31 dBm
<0008&gt; tbf.cpp:486 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=UL STATE=FINISHED) free
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402816, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402863, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402911, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2402959, TS=6
<0007&gt; gprs_rlcmac_meas.cpp:184 DL Bandwitdh of IMSI=460000323182742 / 
TLLI=0xaf8ce1ff: 240 KBits/s
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2403006, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2403054, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2403102, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2403149, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FINISHED) 
Scheduled Ack/Nack polling on FN=2403197, TS=6
<0008&gt; tbf.cpp:650 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=WAIT RELEASE) 
T3193 timeout expired, freeing TBF
<0008&gt; tbf.cpp:486 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=RELEASING) free
<000c&gt; gprs_bssgp_pcu.cpp:168 LLC [SGSN -&gt; PCU] = TLLI: 0xaf8ce1ff IMSI: 
460000323182742 len: 26
<0008&gt; tbf.cpp:1068 Allocating DL TBF: MS_CLASS=12/12
<0008&gt; tbf.cpp:541 TBF(TFI=0 TLLI=0x00000000 DIR=DL STATE=NULL) Setting 
Control TS 6
<0008&gt; tbf.cpp:945 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=NULL) Allocated: 
trx = 0, ul_slots = 40, dl_slots = 40
<0008&gt; bts.cpp:898 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) TX: START 
Immediate Assignment Downlink (PCH)
<0008&gt; tbf_dl.cpp:520 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) set 
ass. type PACCH [prev CCCH:0, PACCH:0]
<0008&gt; tbf.cpp:1270 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) start 
Packet Downlink Assignment (PACCH)
<0009&gt; tbf.cpp:788 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) Scheduled 
DL Assignment polling on PACCH (FN=2404263, TS=6)
<0007&gt; gprs_rlcmac_meas.cpp:184 DL Bandwitdh of IMSI=460000323182742 / 
TLLI=0xaf8ce1ff: 22 KBits/s
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2404311, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2404358, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2404406, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2404454, TS=6
<0008&gt; tbf.cpp:808 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) poll timeout 
for FN=2404454, TS=6 (curr FN 2404519)
<0008&gt; tbf.cpp:879 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Timeout for 
polling PACKET DOWNLINK ACK.
<0008&gt; tbf.cpp:1184 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Assignment 
was on PACCH
<0008&gt; tbf.cpp:1190 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Downlink 
ACK was received
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2404558, TS=6
<0007&gt; gprs_rlcmac_meas.cpp:184 DL Bandwitdh of IMSI=460000323182742 / 
TLLI=0xaf8ce1ff: 163 KBits/s
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2404605, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2404653, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2404701, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FINISHED) 
Scheduled Ack/Nack polling on FN=2404748, TS=6
<0008&gt; tbf.cpp:650 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=WAIT RELEASE) 
T3193 timeout expired, freeing TBF
<0008&gt; tbf.cpp:486 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=RELEASING) free
<000c&gt; gprs_bssgp_pcu.cpp:168 LLC [SGSN -&gt; PCU] = TLLI: 0xaf8ce1ff IMSI: 
460000323182742 len: 26
<0008&gt; tbf.cpp:1068 Allocating DL TBF: MS_CLASS=12/12
<0008&gt; tbf.cpp:541 TBF(TFI=0 TLLI=0x00000000 DIR=DL STATE=NULL) Setting 
Control TS 6
<0008&gt; tbf.cpp:945 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=NULL) Allocated: 
trx = 0, ul_slots = 40, dl_slots = 40
<0008&gt; bts.cpp:898 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) TX: START 
Immediate Assignment Downlink (PCH)
<0008&gt; tbf_dl.cpp:520 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) set 
ass. type PACCH [prev CCCH:0, PACCH:0]
<0008&gt; tbf.cpp:1270 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) start 
Packet Downlink Assignment (PACCH)
<0009&gt; tbf.cpp:788 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=ASSIGN) Scheduled 
DL Assignment polling on PACCH (FN=2405537, TS=6)
<0007&gt; gprs_rlcmac_meas.cpp:184 DL Bandwitdh of IMSI=460000323182742 / 
TLLI=0xaf8ce1ff: 25 KBits/s
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2405585, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2405632, TS=6
<0009&gt; tbf_dl.cpp:880 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Scheduled 
Ack/Nack polling on FN=2405680, TS=6
<0008&gt; tbf.cpp:808 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) poll timeout 
for FN=2405680, TS=6 (curr FN 2405741)
<0008&gt; tbf.cpp:879 TBF(TFI=0 TLLI=0xaf8ce1ff DIR=DL STATE=FLOW) Timeout for 
polling PACKET DOWNLINK ACK.



osmo-sgsn debugging info:
<0011&gt; gprs_llc_parse.c:78 LLC SAPI=1 C&nbsp;&nbsp; U GEA0 IOV-UI=0x000000 
FCS=0xa3ad04 CMD=UI DATA 
<0002&gt; gprs_gmm.c:1118 MM(---/ffffffff) -&gt; GMM ATTACH REQUEST 
MI(4018987519) type="GPRS attach" 
<0002&gt; fsm.c:461 GMM(gmm_fsm)[0xaaaaf63e5b50]{Deregistered}: Allocated
<0002&gt; fsm.c:461 GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{Init}: 
Allocated
<0002&gt; fsm.c:461 MM_STATE_Gb[0xaaaaf63e5e50]{Idle}: Allocated
<0002&gt; gprs_sgsn.c:299 MM(/00000000) Allocated with GEA0 cipher.
<0002&gt; gprs_gmm.c:1100 GMM(gmm_fsm)[0xaaaaf63e5b50]{Deregistered}: Received 
Event E_GMM_COMMON_PROC_INIT_REQ
<0002&gt; gprs_gmm_fsm.c:25 GMM(gmm_fsm)[0xaaaaf63e5b50]{Deregistered}: 
state_chg to CommonProcedureInitiated
<0011&gt; gprs_llc.c:1056 LLME(ffffffff/af8ce1ff){UNASSIGNED} LLGM Assign pre 
(af8ce1ff =&gt; cf0ebf06)
<0011&gt; gprs_llc.c:1102 LLME(af8ce1ff/cf0ebf06){ASSIGNED} LLGM Assign post 
(af8ce1ff =&gt; cf0ebf06)
<0002&gt; gprs_gmm.c:1271 GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{Init}: 
Received Event E_ATTACH_REQ_RECV
<0002&gt; gprs_gmm_attach.c:50 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{Init}: state_chg to CheckIdentity
<0002&gt; gprs_gmm.c:409 MM(/cf0ebf06) <- GPRS IDENTITY REQUEST: mi_type=IMEI
<0010&gt; gprs_bssgp.c:423 BSSGP TLLI=0xaf8ce1ff Rx UPLINK-UNITDATA
<0011&gt; gprs_llc_parse.c:78 LLC SAPI=1 C&nbsp;&nbsp; U GEA0 IOV-UI=0x000000 
FCS=0x8c64cd CMD=UI DATA 
<0002&gt; gprs_gb.c:40 MM_STATE_Gb(2945245695)[0xaaaaf63e5e50]{Idle}: Received 
Event E_MM_PDU_RECEPTION
<0002&gt; gprs_gmm.c:1040 MM(/cf0ebf06) -&gt; GMM IDENTITY RESPONSE: 
MI(IMEI)=866089038960590
<0002&gt; gprs_gmm.c:113 MM(/cf0ebf06) Stopping MM timer 3370 but 0 is running
<0002&gt; gprs_gmm.c:1084 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{CheckIdentity}: Received Event 
E_IDEN_RESP_RECV
<0002&gt; gprs_gmm_attach.c:111 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{CheckIdentity}: state_chg to 
CheckIdentity
<0002&gt; gprs_gmm.c:409 MM(/cf0ebf06) <- GPRS IDENTITY REQUEST: mi_type=IMSI
<0010&gt; gprs_bssgp.c:423 BSSGP TLLI=0xaf8ce1ff Rx UPLINK-UNITDATA
<0011&gt; gprs_llc_parse.c:78 LLC SAPI=1 C&nbsp;&nbsp; U GEA0 IOV-UI=0x000000 
FCS=0xb71895 CMD=UI DATA 
<0002&gt; gprs_gb.c:40 MM_STATE_Gb(2945245695)[0xaaaaf63e5e50]{Idle}: Received 
Event E_MM_PDU_RECEPTION
<0002&gt; gprs_gmm.c:1040 MM(/cf0ebf06) -&gt; GMM IDENTITY RESPONSE: 
MI(IMSI)=460000323182742
<0002&gt; gprs_gmm.c:113 MM(/cf0ebf06) Stopping MM timer 3370 but 0 is running
<0002&gt; gprs_gmm.c:1084 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{CheckIdentity}: Received Event 
E_IDEN_RESP_RECV
<0002&gt; gprs_gmm_attach.c:113 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{CheckIdentity}: state_chg to 
Authenticate
<0002&gt; gprs_gmm_attach.c:148 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{Authenticate}: state_chg to 
WaitAttachComplete
<0002&gt; gprs_gmm.c:289 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(new P-TMSI=0xcf0ebf06)
<0002&gt; gprs_gmm.c:305 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(ra_id=0x020xf20x50 lac:2f11 rac:2)
<000e&gt; gprs_sgsn.c:1012 Checking for inactive LLMEs, time = 1652
<000f&gt; gprs_ns.c:779 NSEI=1234 Timer expired in mode tns-test (30 seconds)
<000f&gt; gprs_ns.c:712 NSEI=1234 Tx NS ALIVE (NSVCI=1234)
<000f&gt; gprs_ns.c:751 NSEI=1234 Starting timer in mode tns-alive (3 seconds)
<000f&gt; gprs_ns.c:725 NSEI=1234 Tx NS ALIVE_ACK (NSVCI=1234)
<000f&gt; gprs_ns.c:1763 NSEI 1234 (NS-VCI=1234) setting state 
[ALIVE,UNBLOCKED,UNRESET] -&gt; [ALIVE,UNBLOCKED,UNRESET]
<000f&gt; gprs_ns.c:751 NSEI=1234 Starting timer in mode tns-test (30 seconds)
<0010&gt; gprs_bssgp.c:839 BSSGP BVCI=1234 Rx Flow Control BVC
<0002&gt; fsm.c:322 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{WaitAttachComplete}: Timeout of 
T3350
<0002&gt; gprs_gmm.c:289 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(new P-TMSI=0xcf0ebf06)
<0002&gt; gprs_gmm.c:305 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(ra_id=0x020xf20x50 lac:2f11 rac:2)
<0002&gt; fsm.c:322 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{WaitAttachComplete}: Timeout of 
T3350
<0002&gt; gprs_gmm.c:289 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(new P-TMSI=0xcf0ebf06)
<0002&gt; gprs_gmm.c:305 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(ra_id=0x020xf20x50 lac:2f11 rac:2)
<0010&gt; gprs_bssgp.c:423 BSSGP TLLI=0xaf8ce1ff Rx UPLINK-UNITDATA
<0011&gt; gprs_llc_parse.c:78 LLC SAPI=1 C&nbsp;&nbsp; U GEA0 IOV-UI=0x000000 
FCS=0x0d0447 CMD=UI DATA 
<0002&gt; gprs_gb.c:40 MM_STATE_Gb(2945245695)[0xaaaaf63e5e50]{Idle}: Received 
Event E_MM_PDU_RECEPTION
<0002&gt; gprs_gmm.c:1118 MM(460000323182742/cf0ebf06) -&gt; GMM ATTACH REQUEST 
MI(4018987519) type="GPRS attach" 
<0002&gt; gprs_gmm.c:1100 
GMM(gmm_fsm)[0xaaaaf63e5b50]{CommonProcedureInitiated}: Received Event 
E_GMM_COMMON_PROC_INIT_REQ
<0002&gt; gprs_gmm.c:1100 
GMM(gmm_fsm)[0xaaaaf63e5b50]{CommonProcedureInitiated}: Event 
E_GMM_COMMON_PROC_INIT_REQ not permitted
<0011&gt; gprs_llc.c:1056 LLME(af8ce1ff/cf0ebf06){ASSIGNED} LLGM Assign pre 
(af8ce1ff =&gt; cf0ebf06)
<0011&gt; gprs_llc.c:1102 LLME(af8ce1ff/cf0ebf06){ASSIGNED} LLGM Assign post 
(af8ce1ff =&gt; cf0ebf06)
<0002&gt; gprs_gmm.c:1271 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{WaitAttachComplete}: Received 
Event E_ATTACH_REQ_RECV
<0002&gt; gprs_gmm_attach.c:360 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{WaitAttachComplete}: state_chg 
to Init
<0002&gt; gprs_gmm_attach.c:50 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{Init}: state_chg to CheckIdentity
<0002&gt; gprs_gmm.c:409 MM(460000323182742/cf0ebf06) <- GPRS IDENTITY REQUEST: 
mi_type=IMEI
<0010&gt; gprs_bssgp.c:839 BSSGP BVCI=1234 Rx Flow Control BVC
<0010&gt; gprs_bssgp.c:423 BSSGP TLLI=0xaf8ce1ff Rx UPLINK-UNITDATA
<0011&gt; gprs_llc_parse.c:78 LLC SAPI=1 C&nbsp;&nbsp; U GEA0 IOV-UI=0x000000 
FCS=0xea5c4f CMD=UI DATA 
<0002&gt; gprs_gb.c:40 MM_STATE_Gb(2945245695)[0xaaaaf63e5e50]{Idle}: Received 
Event E_MM_PDU_RECEPTION
<0002&gt; gprs_gmm.c:1040 MM(460000323182742/cf0ebf06) -&gt; GMM IDENTITY 
RESPONSE: MI(IMEI)=866089038960590
<0002&gt; gprs_gmm.c:113 MM(460000323182742/cf0ebf06) Stopping MM timer 3370 
but 0 is running
<0002&gt; gprs_gmm.c:1084 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{CheckIdentity}: Received Event 
E_IDEN_RESP_RECV
<0002&gt; gprs_gmm_attach.c:113 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{CheckIdentity}: state_chg to 
Authenticate
<0002&gt; gprs_gmm_attach.c:148 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{Authenticate}: state_chg to 
WaitAttachComplete
<0002&gt; gprs_gmm.c:289 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(new P-TMSI=0xcf0ebf06)
<0002&gt; gprs_gmm.c:305 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(ra_id=0x020xf20x50 lac:2f11 rac:2)
<0002&gt; fsm.c:322 
GMM_ATTACH_REQ_FSM(gb_gmm_req)[0xaaaaf63e5c80]{WaitAttachComplete}: Timeout of 
T3350
<0002&gt; gprs_gmm.c:289 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(new P-TMSI=0xcf0ebf06)
<0002&gt; gprs_gmm.c:305 MM(460000323182742/cf0ebf06) <- GPRS ATTACH ACCEPT 
(ra_id=0x020xf20x50 lac:2f11 rac:2)



Configure information??
gprs mode egprs
&nbsp; gprs routing area 2
&nbsp; gprs cell bvci 1234
&nbsp; gprs nsei 1234
&nbsp; gprs nsvc 0 nsvci 1234
&nbsp; gprs nsvc 0 local udp port 23001
&nbsp; gprs nsvc 0 remote udp port 23000
&nbsp; ??????
&nbsp;&nbsp; timeslot 6
&nbsp;&nbsp;&nbsp; phys_chan_config PDCH
&nbsp;&nbsp;&nbsp; hopping enabled 0
&nbsp;&nbsp; timeslot 7
&nbsp;&nbsp;&nbsp; phys_chan_config PDCH
&nbsp;&nbsp;&nbsp; hopping enabled 0


pcu
&nbsp;flow-control-interval 10
&nbsp;cs 2
&nbsp;cs max 4
&nbsp;cs threshold 10 33
&nbsp;cs downgrade-threshold 200
&nbsp;cs link-quality-ranges cs1 6 cs2 5 8 cs3 7 13 cs4 12
&nbsp;mcs link-quality-ranges mcs1 6 mcs2 5 8 mcs3 7 13 mcs4 12 15 mcs5 14 17 
mcs6 16 18 mcs7 17 20 mcs8 19 24 mcs9 23
&nbsp;mcs max 9
&nbsp;window-size 64 0
&nbsp;queue idle-ack-delay 10
&nbsp;queue codel
&nbsp;alloc-algorithm dynamic
&nbsp;alpha 0
&nbsp;gamma 0
&nbsp;dl-tbf-idle-time 2000



sgsn
&nbsp;gtp local-ip 127.0.0.1
&nbsp;ggsn 0 remote-ip 127.0.0.6
&nbsp;ggsn 0 gtp-version 1
&nbsp;auth-policy accept-all
ns
&nbsp;timer tns-block 3
&nbsp;timer tns-block-retries 3
&nbsp;timer tns-reset 3
&nbsp;timer tns-reset-retries 3
&nbsp;timer tns-test 30
&nbsp;timer tns-alive 3
&nbsp;timer tns-alive-retries 10
&nbsp;encapsulation udp local-ip 127.0.0.1
&nbsp;encapsulation udp local-port 23000
&nbsp;encapsulation framerelay-gre enabled 0


Version information:
OsmoPCU version 0.8.0
OsmoSGSN version 1.6.2


I tried to debug this issue but the no any progress for this issue.The root 
cause is confifure or something else?
I need help.
Thanks a lot.


Br,
Perter

osmo-pcu always "T3193 timeout expired, freeing TBF" when osmo-sgsn send GPRS ATTACH ACCEPT

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