Bug #3908
closed"PS Activation" takes long time - missing Iu-Release Command after Attach Complete
100%
Description
I've noticed that it takes around 10 seconds for PS to work after a phone becomes registered on the network. Basically, the phone waited for 10 seconds after Attach Complete message and then sent Iu-ReleaseRequest and only then Service Request. (after Iu-Release completion)
If I send the Iu-ReleaseCommand (diff file sgsn-iu-release-after-attach-complete.diff, applied to 1.4.0) upon receiving Attach Complete message then the phone sends Service Request right away after Iu-Release completion.
RANAP trace without the fix - without-fix.pcap (Attach Complete - packet # 73 - there you see around 10s delay betweenand the phone sending Iu-ReleaseRequest)
RANAP trace with the fix - with-fix.pcap (Attach Complete - packet # 43)
Files
Related issues
Updated by laforge almost 5 years ago
- Status changed from New to Resolved
- Assignee set to laforge
- % Done changed from 0 to 100
See https://gerrit.osmocom.org/#/c/osmo-sgsn/+/13544/ for a patch that was just merged. MAybe not the most elegant solution, but works for now.
Updated by laforge almost 5 years ago
- Related to Bug #1818: IuPS: CN should Iu Release in certain situations added
Updated by laforge almost 5 years ago
- doesn't wait for an Iu-ReleaseComplete from the RNC
- doesn't actually close the SCCP connection
See #1818#note-14 for some more details and spec references