Project

General

Profile

Actions

Feature #4200

open

Work around nano3G-S16 requiring RAB ID to be below 16

Added by efistokl over 4 years ago. Updated over 4 years ago.

Status:
In Progress
Priority:
Normal
Assignee:
Category:
-
Target version:
-
Start date:
09/12/2019
Due date:
% Done:

0%

Resolution:
Spec Reference:
Tags:
3G

Description

Hardware: ip.access nano3g S16.

Tested against osmo-msc version branches 35c3 and cccamp19 (with Message Class and RAT GSUP IEs stripped out). Reproduced 3 times.

In the trace there are 17 incoming SIP calls. The last 2 failed (around packet 36826 and 37625). In the RAB-AssignmentResponse's for them I see "radioNetwork: failure-in-the-radio-interface-procedure (14)".

If I restart the osmo-msc, I can make another 15 calls.

IPs:
10.0.2.247 - nano3g S16
10.0.2.244 - RNC:
- 10.0.2.244:5060 osmo-sip-connector
- 10.0.2.244:5064 local PBX (kamailio)
172.48.2.1 - Remote PBX (kamailio)
172.48.1.5 - GSUP server

Note:
Apart from the osmocom software there is Kamailio and rtpengine installed alongside osmo-sip-connector to allow for transcoding. I've set it in a way so that it "sleeps" for 3 seconds before passing SIP INVITE to osmo-sip-connector. (If I don't do this then the UE will not respond to Paging Request (assuming it doesn't have enough time after Iu-Release which happens after USSD))


Files

msc.log.txt msc.log.txt 2.86 MB Debug output from osmo-msc efistokl, 09/12/2019 01:48 PM
rnc.pcap rnc.pcap 7.38 MB Trace captured at 10.0.2.244 efistokl, 09/12/2019 01:49 PM
Actions

Also available in: Atom PDF

Add picture from clipboard (Maximum size: 48.8 MB)