Any help about when using grgsm and osmocom-bb as gsm ue, can't attach openBTS.

[wang fang]

hardware is b210.

grgsm is maint-3.10_with_multiarfcn in https://github.com/bkerler/gr-gsm.git

./mobile -c ~/osmocom-bb/doc/examples/mobile/default.cfg

./trxcon -p 5705

grgsm_trx -p 5705 

it can find the cell, but can't attach. And the TX light is always off.

Any one get any suggestion. Thanks a lot!

some logs:

[i] Recv SETSLOT cmd
[i] Configure timeslot filter to: tn=0
[i] Recv RXTUNE cmd
[i] Recv TXTUNE cmd
[i] Recv POWERON CMD
[i] Starting transceiver...
Lusrp_sink :error: In the last 15894 ms, 1 cmd time errors occurred.
Lusrp_sink :error: In the last 1200 ms, 1 cmd time errors occurred.
LLusrp_sink :error: In the last 1000 ms, 1 cmd time errors occurred.
[i] Recv SETSLOT cmd
[i] Configure timeslot filter to: drop all
[i] Recv POWEROFF cmd
[i] Stopping transceiver...

20240329213927011 DSCH NOTICE trxcon(0)[0x6118ef96cd80]: (Re)configure TDMA timeslot #0 as BCCH+CCCH+SDCCH/4+SACCH/4 (sched_trx.c:274)
20240329213927011 DSCH NOTICE trxcon(0)[0x6118ef96cd80]: TS0-SCH activating (sched_trx.c:476)
20240329213927011 DSCH NOTICE trxcon(0)[0x6118ef96cd80]: TS0-BCCH activating (sched_trx.c:476)
20240329213927011 DSCH NOTICE trxcon(0)[0x6118ef96cd80]: TS0-RACH activating (sched_trx.c:476)
20240329213927011 DSCH NOTICE trxcon(0)[0x6118ef96cd80]: TS0-CCCH activating (sched_trx.c:476)
20240329213927111 DL1C NOTICE trxcon(0)[0x6118ef96cd80]{BCCH_CCCH}: Received L1CTL_PARAM_REQ (ta=0, tx_power=0) (l1ctl.c:706)
20240329213927111 DL1C NOTICE trxcon(0)[0x6118ef96cd80]{BCCH_CCCH}: Received 8-bit RACH request (offset=9, ra=0x08) (l1ctl.c:540)
20240329213927196 DSCHD NOTICE trxcon(0)[0x6118ef96cd80]: TS0-RACH Scheduled 8-bit RACH (TS0: GSM, GMSK) at fn=1691642 (sched_lchan_rach.c:128)
20240329213927196 DL1C NOTICE trxcon(0)[0x6118ef96cd80]{BCCH_CCCH}: Received L1CTL_PARAM_REQ (ta=0, tx_power=0) (l1ctl.c:706)
20240329213927196 DL1C NOTICE trxcon(0)[0x6118ef96cd80]{BCCH_CCCH}: Received 8-bit RACH request (offset=137, ra=0x06) (l1ctl.c:540)
20240329213928386 DSCHD NOTICE trxcon(0)[0x6118ef96cd80]: TS0-RACH Scheduled 8-bit RACH (TS0: GSM, GMSK) at fn=1691900 (sched_lchan_rach.c:128)
20240329213928386 DL1C NOTICE trxcon(0)[0x6118ef96cd80]{BCCH_CCCH}: Received L1CTL_PARAM_REQ (ta=0, tx_power=0) (l1ctl.c:706)
20240329213928386 DL1C NOTICE trxcon(0)[0x6118ef96cd80]{BCCH_CCCH}: Received 8-bit RACH request (offset=127, ra=0x04) (l1ctl.c:540)
20240329213929530 DSCHD NOTICE trxcon(0)[0x6118ef96cd80]: TS0-RACH Scheduled 8-bit RACH (TS0: GSM, GMSK) at fn=1692148 (sched_lchan_rach.c:128)
20240329213934531 DL1C NOTICE trxcon(0)[0x6118ef96cd80]{BCCH_CCCH}: Received L1CTL_DM_REL_REQ (l1ctl.c:651)
20240329213934531 DAPP ERROR trxcon(0)[0x6118ef96cd80]{BCCH_CCCH}: Event TRXCON_EV_DCH_REL_REQ not permitted (l1ctl.c:653)
20240329213934531 DL1C NOTICE trxcon(0)[0x6118ef96cd80]{BCCH_CCCH}: Received reset request (FULL) (l1ctl.c:437)
20240329213934531 DSCH NOTICE trxcon(0)[0x6118ef96cd80]: Reset scheduler and clock counter (sched_trx.c:189)
20240329213934531 DSCH NOTICE trxcon(0)[0x6118ef96cd80]: Delete TDMA timeslot #0 (sched_trx.c:226)
20240329213934531 DL1C NOTICE trxcon(0)[0x6118ef96cd80]{RESET}: Received reset request (FULL) (l1ctl.c:437)
20240329213934531 DSCH NOTICE trxcon(0)[0x6118ef96cd80]: Reset scheduler and clock counter (sched_trx.c:189)
20240329213934531 DTRXC ERROR trx_interface(0)[0x6118ef96d370]{RSP_WAIT}: read() failed with rc=-1 (trx_if.c:491)

<0003> gsm322.c:2951 Channel sync error, try again
<0003> gsm322.c:463 Sync to ARFCN=1 rxlev=-86 (Sysinfo, ccch mode COMB)
<000e> l1ctl.c:754 Tx Reset Req (1)
<000e> l1l2_interface.c:139 Sending: '0d 00 00 00 01 00 00 00 '
<000e> l1ctl.c:404 Sync Req
<000e> l1l2_interface.c:139 Sending: '01 00 00 00 00 01 00 64 27 10 03 20 03 07 00 02 18 '
<000e> l1ctl.c:764 Layer1 Reset indication
<000e> l1ctl.c:137 snr=0000, arfcn=1 result=0
<000e> l1ctl.c:149 SCH: SNR: 0 TDMA: (0000/00/00) bsic: 2
<0003> gsm322.c:2906 Channel synched. (ARFCN=1, snr=0, BSIC=2)
<0001> gsm322.c:2929 using DSC of 90
<0003> gsm48_rr.c:6253 Channel provides data.
<0001> gsm48_rr.c:2467 RANDOM ACCESS (requests left 3)
<0001> gsm48_rr.c:2523 RANDOM ACCESS (Tx-integer 32 combined yes S(lots) 0 ra 0x08)
<0001> gsm48_rr.c:2559 Use MS-TXPWR-MAX-CCH power value 0 (39 dBm)
<000e> l1ctl.c:479 PARAM Req. ta=0, tx_power=0
<000e> l1l2_interface.c:139 Sending: '13 00 00 00 00 00 00 00 00 00 00 00 '
<000e> l1ctl.c:527 RACH Req. offset=9 combined=1 uic=0xff
<000e> l1l2_interface.c:139 Sending: '04 00 00 00 88 00 00 00 08 01 00 09 ff '
<0001> gsm48_rr.c:835 MON: f=1 lev=-49 snr= 0 ber=  0 CGI=001-01-1000-10
<0001> gsm48_rr.c:2467 RANDOM ACCESS (requests left 2)
<0001> gsm48_rr.c:2523 RANDOM ACCESS (Tx-integer 32 combined yes S(lots) 115 ra 0x06)
<0001> gsm48_rr.c:2559 Use MS-TXPWR-MAX-CCH power value 0 (39 dBm)
<000e> l1ctl.c:479 PARAM Req. ta=0, tx_power=0
<000e> l1l2_interface.c:139 Sending: '13 00 00 00 00 00 00 00 00 00 00 00 '
<000e> l1ctl.c:527 RACH Req. offset=137 combined=1 uic=0xff
<000e> l1l2_interface.c:139 Sending: '04 00 00 00 88 00 00 00 06 01 00 89 ff '
<0001> gsm48_rr.c:835 MON: f=1 lev=-49 snr= 0 ber=  0 CGI=001-01-1000-10
<0001> gsm48_rr.c:2467 RANDOM ACCESS (requests left 1)
<0001> gsm48_rr.c:2523 RANDOM ACCESS (Tx-integer 32 combined yes S(lots) 115 ra 0x04)
<0001> gsm48_rr.c:2559 Use MS-TXPWR-MAX-CCH power value 0 (39 dBm)
<000e> l1ctl.c:479 PARAM Req. ta=0, tx_power=0
<000e> l1l2_interface.c:139 Sending: '13 00 00 00 00 00 00 00 00 00 00 00 '
<000e> l1ctl.c:527 RACH Req. offset=127 combined=1 uic=0xff
<000e> l1l2_interface.c:139 Sending: '04 00 00 00 88 00 00 00 04 01 00 7f ff '
<0001> gsm48_rr.c:835 MON: f=1 lev=-49 snr= 0 ber=  0 CGI=001-01-1000-10