UE Unable to Obtain IP Address | Flooding error logs in OSMO-PCU

Ron ron.menez at entropysolution.com
Fri Aug 10 15:48:39 UTC 2018


Hi Community,

We tried to used the GPRS capability of OSMOCOM.

Installation and configuration were based in the URL provided below:
https://osmocom.org/projects/cellular-infrastructure/wiki/Osmocom_Network_In_The_Box#OsmoBTS

We successfully installed the needed elements to run GPRS and we were able to run the following:
osmo-msc
osmo-stp
osmo-hnbgw (optional)
osmo-ggsn
osmo-sgsn
osmo-mgw
osmo-bsc
osmo-trx-uhd
osmo-hlr
osmo-pcu

UE were able to camp but IP Address is unavailable (checked it under Settings > About Phone > Status)

No session / request coming in the OSMO-SGSN.

We are also flooded with this log in OSMO-PCU:

<000c> gprs_bssgp_pcu.cpp:848 Sending unblock on BVCI 1800
<000c> gprs_bssgp_bss.c:274 BSSGP (BVCI=1800) Tx BVC-BLOCK
<000c> gprs_bssgp.c:288 Cell 001-01-23-0 CI 0 on BVCI 1800
<000c> gprs_bssgp_bss.c:294 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention
<000c> gprs_bssgp.c:550 BSSGP BVCI=0 Rx BVC STATUS, cause=Protocol error - unspecified
<000c> gprs_bssgp_pcu.cpp:354 Rx BSSGP BVCI=0 (SIGN) PDU type BVC-UNBLOCK unknown
<000c> gprs_bssgp_util.c:238 BSSGP BVCI=0 Tx STATUS, cause=Protocol error - unspecified
<000c> gprs_bssgp_pcu.cpp:304 Rx BSSGP BVCI=0 (SIGN) BVC_RESET_ACK
<000c> gprs_bssgp_pcu.cpp:848 Sending unblock on BVCI 1800
<000c> gprs_bssgp_bss.c:274 BSSGP (BVCI=1800) Tx BVC-BLOCK
<000c> gprs_bssgp.c:288 Cell 001-01-23-0 CI 0 on BVCI 1800
<000c> gprs_bssgp_bss.c:294 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention
<000c> gprs_bssgp.c:550 BSSGP BVCI=0 Rx BVC STATUS, cause=Protocol error - unspecified
<000c> gprs_bssgp_pcu.cpp:354 Rx BSSGP BVCI=0 (SIGN) PDU type BVC-UNBLOCK unknown
<000c> gprs_bssgp_util.c:238 BSSGP BVCI=0 Tx STATUS, cause=Protocol error - unspecified
<000c> gprs_bssgp_pcu.cpp:304 Rx BSSGP BVCI=0 (SIGN) BVC_RESET_ACK
<000c> gprs_bssgp_pcu.cpp:848 Sending unblock on BVCI 1800
<000c> gprs_bssgp_bss.c:274 BSSGP (BVCI=1800) Tx BVC-BLOCK
<000c> gprs_bssgp.c:288 Cell 001-01-23-0 CI 0 on BVCI 1800
<000c> gprs_bssgp_bss.c:294 BSSGP (BVCI=1800) Tx BVC-RESET CAUSE=O&M intervention
<000c> gprs_bssgp.c:550 BSSGP BVCI=0 Rx BVC STATUS, cause=Protocol error - unspecified
<000c> gprs_bssgp_pcu.cpp:354 Rx BSSGP BVCI=0 (SIGN) PDU type BVC-UNBLOCK unknown
<000c> gprs_bssgp_util.c:238 BSSGP BVCI=0 Tx STATUS, cause=Protocol error - unspecified
<000c> gprs_bssgp_pcu.cpp:304 Rx BSSGP BVCI=0 (SIGN) BVC_RESET_ACK

Any suggestion / comments what seems to be the problem with our setup?

TIA.

Best Regard,

Ron Menez
ron.menez at entropysolution.com<mailto:ron.menez at entropysolution.com>




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