HR / AMR Lab Testing Using OSMO-NITB

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Sonny Lafuente sonny.lafuente at entropysolution.com
Tue Aug 10 10:36:11 UTC 2021 

Hello Community!


Would like to as if anyone here have experience  testing Half rate /AMR in osmo-nitb and Freeswitch. Basically we are testing it in our lab with our devices Samsung Note 9 and iPhone and we are having issue / errors as observed during testing. Below are the details of the NITB we using:



OpenBSC# show version
OpenBSC 1.1.0.76-0bbb9 (OpenBSC).
Copyright (C) 2008-2016 Harald Welte, Holger Freyther
Contributions by Daniel Willmann, Jan Lübbe, Stefan Schmidt
Dieter Spaar, Andreas Eversberg, Sylvain Munaut, Neels Hofmeyr

License AGPLv3+: GNU AGPL version 3 or later <http://gnu.org/licenses/agpl-3.0.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

OpenBSC#



Osmo running-config:

stats interval 5
!
line vty
 no login
!
e1_input
 e1_line 0 driver ipa
 e1_line 0 port 0
 no e1_line 0 keepalive
network
 network country code 10
 mobile network code 1
 short name testnetwork
 long name testnetwork
 auth policy closed
 authorized-regexp .*
 location updating reject cause 13
 encryption a5 0
 neci 1
 paging any use tch 0
 rrlp mode none
 mm info 1
 handover 0
 handover window rxlev averaging 10
 handover window rxqual averaging 1
 handover window rxlev neighbor averaging 10
 handover power budget interval 6
 handover power budget hysteresis 3
 handover maximum distance 9999

 timer t3113 60

 timer t3103 1

 timer t3101 10

 timer t3109 1

 timer t3122 10

 timer t3105 1

 dyn_ts_allow_tch_f 0
 subscriber-keep-in-ram 1

 bts 0
  type sysmobts
  band GSM900
  cell_identity 1
  location_area_code 1
  base_station_id_code 63
  ms max power 23
  cell reselection hysteresis 4
  rxlev access min 0
  periodic location update 30
  radio-link-timeout 32
  channel allocator descending
  rach tx integer 9
  rach max transmission 7
  channel-descrption attach 1
  channel-descrption bs-pa-mfrms 5
  channel-descrption bs-ag-blks-res 1
  early-classmark-sending forbidden
  ip.access unit_id 1000 0
  oml ip.access stream_id 255 line 0
  neighbor-list mode automatic
  codec-support fr hr efr amr
  amr tch-h modes 0
  amr tch-h start-mode auto

  trx 0
   rf_locked 0
   arfcn 122
   nominal power 0
   rsl e1 tei 0

   timeslot 0
    phys_chan_config CCCH+SDCCH4
    hopping enabled 0
   timeslot 1
    phys_chan_config SDCCH8
    hopping enabled 0
   timeslot 2
    phys_chan_config SDCCH8
    hopping enabled 0
   timeslot 3
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 4
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 5
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 6
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 7
    phys_chan_config TCH/H
    hopping enabled 0
  trx 1
   rf_locked 0
   arfcn 42
   nominal power 0
   rsl e1 tei 0

   timeslot 0
    phys_chan_config CCCH+SDCCH4
    hopping enabled 0
   timeslot 1
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 2
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 3
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 4
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 5
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 6
    phys_chan_config TCH/H
    hopping enabled 0
   timeslot 7
    phys_chan_config TCH/H
    hopping enabled 0
mncc-int
 default-codec tch-f fr
 default-codec tch-h amr
nitb
 subscriber-create-on-demand

 subscriber-create-on-demand random 100000 199999
 no assign-tmsi
smpp
 local-tcp-ip 127.0.0.1 2776
 system-id password
 policy closed
 smpp-first
 esme admin
  password password
  default-route


NITB Logs:



Not Working:


Tue Aug 10 17:08:40 2021 <0004> abis_rsl.c:1848 (bts=0) CHAN RQD: reason: call re-establishment (ra=0x49, neci=0x01, chreq_reason=0x02)
Tue Aug 10 17:08:40 2021 <0004> abis_rsl.c:1924 (bts=0,trx=1,ts=7,ss=0) Activating ARFCN(73) SS(0) lctype TCH_H r=CALL ra=0x49 ta=0
Tue Aug 10 17:08:40 2021 <0004> abis_rsl.c:595 (bts=0,trx=1,ts=7,pchan=TCH/H) Tx RSL Channel Activate with act_type=INITIAL
Tue Aug 10 17:08:40 2021 <0004> abis_rsl.c:1231 (bts=0,trx=1,ts=7,ss=0) state NONE -> ACTIVATION REQUESTED
Tue Aug 10 17:08:40 2021 <0004> abis_rsl.c:1603 (bts=0,trx=1,ts=7,ss=0) CHANNEL ACTIVATE ACK
Tue Aug 10 17:08:40 2021 <0004> abis_rsl.c:1231 (bts=0,trx=1,ts=7,ss=0) state ACTIVATION REQUESTED -> ACTIVE
Tue Aug 10 17:08:41 2021 <000a> bsc_api.c:415 Sending (bts=0,trx=1,ts=7,ss=0) ChanModify for speech: SPEECH_AMR on channel TCH_H
Tue Aug 10 17:08:41 2021 <0003> gsm_04_08_utils.c:517 -> CHANNEL MODE MODIFY mode=0x41 <—————————————————————————————————————— This is what we observed, no Channel Modify Ack
Tue Aug 10 17:08:47 2021 <000a> bsc_api.c:139 Assignment T10 timeout on 0x15b4350
Tue Aug 10 17:08:47 2021 <0003> osmo_msc.c:82 MSC assign failure (do nothing).
Tue Aug 10 17:08:51 2021 <0004> abis_rsl.c:1848 (bts=0) CHAN RQD: reason: call re-establishment (ra=0x49, neci=0x01, chreq_reason=0x02)
Tue Aug 10 17:08:51 2021 <0004> abis_rsl.c:1924 (bts=0,trx=1,ts=7,ss=1) Activating ARFCN(73) SS(1) lctype TCH_H r=CALL ra=0x49 ta=0
Tue Aug 10 17:08:51 2021 <0004> abis_rsl.c:595 (bts=0,trx=1,ts=7,pchan=TCH/H) Tx RSL Channel Activate with act_type=INITIAL
Tue Aug 10 17:08:51 2021 <0004> abis_rsl.c:1231 (bts=0,trx=1,ts=7,ss=1) state NONE -> ACTIVATION REQUESTED
Tue Aug 10 17:08:51 2021 <0004> abis_rsl.c:1603 (bts=0,trx=1,ts=7,ss=1) CHANNEL ACTIVATE ACK
Tue Aug 10 17:08:51 2021 <0004> abis_rsl.c:1231 (bts=0,trx=1,ts=7,ss=1) state ACTIVATION REQUESTED -> ACTIVE
Tue Aug 10 17:08:53 2021 <0017> smpp_smsc.c:746 [entropy] smpp_pdu_rx(00 00 00 10 00 00 00 15 00 00 00 00 00 00 00 24 )
Tue Aug 10 17:08:53 2021 <0017> smpp_smsc.c:595 [entropy] Rx Enquire Link
Tue Aug 10 17:08:53 2021 <0017> smpp_smsc.c:599 [entropy] Tx Enquire Link Response
Tue Aug 10 17:09:03 2021 <0004> abis_rsl.c:1848 (bts=0) CHAN RQD: reason: call re-establishment (ra=0x47, neci=0x01, chreq_reason=0x02)
Tue Aug 10 17:09:03 2021 <0004> abis_rsl.c:1924 (bts=0,trx=1,ts=6,ss=0) Activating ARFCN(73) SS(0) lctype TCH_H r=CALL ra=0x47 ta=0
Tue Aug 10 17:09:03 2021 <0004> abis_rsl.c:595 (bts=0,trx=1,ts=6,pchan=TCH/H) Tx RSL Channel Activate with act_type=INITIAL
Tue Aug 10 17:09:03 2021 <0004> abis_rsl.c:1231 (bts=0,trx=1,ts=6,ss=0) state NONE -> ACTIVATION REQUESTED
Tue Aug 10 17:09:03 2021 <0004> abis_rsl.c:1603 (bts=0,trx=1,ts=6,ss=0) CHANNEL ACTIVATE ACK
Tue Aug 10 17:09:03 2021 <0004> abis_rsl.c:1231 (bts=0,trx=1,ts=6,ss=0) state ACTIVATION REQUESTED -> ACTIVE
Tue Aug 10 17:09:13 2021 <0004> abis_rsl.c:1358 (bts=0,trx=1,ts=7,ss=0) CONNECTION FAIL: RELEASING state ACTIVE CAUSE=0x01(Radio Link Failure)
Tue Aug 10 17:09:13 2021 <0004> abis_rsl.c:867 (bts=0,trx=1,ts=7,ss=0) RF Channel Release due to error: 1
Tue Aug 10 17:09:13 2021 <0004> abis_rsl.c:777 (bts=0,trx=1,ts=7,ss=0) DEACTivate SACCH CMD
Tue Aug 10 17:09:13 2021 <0004> abis_rsl.c:1231 (bts=0,trx=1,ts=7,ss=0) state ACTIVE -> RELEASE DUE ERROR
Tue Aug 10 17:09:13 2021 <0004> abis_rsl.c:939 (bts=0,trx=1,ts=7,ss=0) RF CHANNEL RELEASE ACK
Tue Aug 10 17:09:17 2021 <0004> abis_rsl.c:826 (bts=0,trx=1,ts=7,ss=0) is back in operation.
Tue Aug 10 17:09:17 2021 <0004> abis_rsl.c:1231 (bts=0,trx=1,ts=7,ss=0) state RELEASE DUE ERROR -> NONE
Tue Aug 10 17:09:19 2021 <0004> abis_rsl.c:1848 (bts=0) CHAN RQD: reason: Location updating (ra=0x07, neci=0x01, chreq_reason=0x03)
Tue Aug 10 17:09:19 2021 <0004> abis_rsl.c:1924 (bts=0,trx=0,ts=1,ss=0) Activating ARFCN(8) SS(0) lctype SDCCH r=LOCATION_UPDATE ra=0x07 ta=0
Tue Aug 10 17:09:19 2021 <0004> abis_rsl.c:595 (bts=0,trx=0,ts=1,pchan=SDCCH8) Tx RSL Channel Activate with act_type=INITIAL
Tue Aug 10 17:09:19 2021 <0004> abis_rsl.c:1231 (bts=0,trx=0,ts=1,ss=0) state NONE -> ACTIVATION REQUESTED
Tue Aug 10 17:09:19 2021 <0004> abis_rsl.c:1603 (bts=0,trx=0,ts=1,ss=0) CHANNEL ACTIVATE ACK
Tue Aug 10 17:09:19 2021 <0004> abis_rsl.c:1231 (bts=0,trx=0,ts=1,ss=0) state ACTIVATION REQUESTED -> ACTIVE




Osmo-sip-connector Logs:


<0000> sip.c:330 sip_release_call(): Release with MNCC cause(NORM_CALL_CLEAR)
<0000> sip.c:302 cause2status(): Mapping cause(NORM_CALL_CLEAR) to status(200)
<0000> sip.c:353 Ending leg(0x8dc700) in con
<0000> sip.c:223 SIP event(33) status(200) phrase(OK) 0x8dc700
<0000> sip.c:257 leg(0x8dc700) got resp to bye
<0000> sip.c:223 SIP event(9) status(200) phrase(Session Terminated) 0x8d7150
<0000> sip.c:265 leg(0x8d7150) got bye, releasing.
<0000> sip.c:223 SIP event(7) status(0) phrase(INVITE sent) 0x8d7150
<0000> sip.c:223 SIP event(1) status(100) phrase(Trying) (nil)
<0000> sip.c:89 Incoming call handle(0x8d96a0)
<0000> sip.c:223 SIP event(7) status(100) phrase(Trying) 0x8dc700
<0000> sip.c:330 sip_release_call(): Release with MNCC cause(RESOURCE_UNAVAIL)
<0000> sip.c:302 cause2status(): Mapping cause(RESOURCE_UNAVAIL) to status(503)
<0000> sip.c:341 Canceling leg(0x8dc700) in cnfd state
<0000> sip.c:223 SIP event(31) status(503) phrase(Service Unavailable) 0x8d7150
<0000> sip.c:242 leg(0x8d7150) unknown SIP status(503), releasing.
<0000> sip.c:248 Releasing other leg (0x8d6f30) with status(503)
<0001> mncc.c:54 cmd(0x204) never arrived for leg(2147483656) <—————————————————————————————————————— Basically it didn’t arrived in B Leg.
<0001> mncc.c:495 call(2147483656) can not be found




Very well appreciated your help on this.



Best Regards,
Sonny


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