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Feature #5501
openMS-side GPRS Mobility Management (GMM) + Session Management (SM)
Status:
In Progress
Priority:
Normal
Assignee:
Category:
OsmocomBB Layer 3 (RR/MM/CC)
Target version:
Start date:
07/01/2022
Due date:
% Done:
20%
Resolution:
Spec Reference:
3GPP TS 24.008, 3GPP TS 24.007
Description
In order to support GPRS from the MS side, we will need a GMM + SM implementation on the mobile side.
The network side is already implemented as part of osmo-sgsn
Related issues
Updated by laforge 12 months ago
- Related to Feature #5500: MS-Side GPRS RLC/MAC implementation added
Updated by laforge 12 months ago
- Related to Feature #5502: MS-side LLC implementation added
Updated by pespin 9 days ago
GMM:
- 3GPP TS 24.008:
- section 4 "Elementary procedures for Mobility Management"
- section 9.4 "GPRS Mobility Management Messages"
- 3GPP TS 24.007:
- section 6.6 "Registration Services for GPRS-Services"
- section 9.4 "Services provided by the LLC entity for GPRS services (GSM only)"
- section 9.5 "Services provided by the GMM for GPRS services"
- gprs_gmm.{c,h}, gprs_gmm_attach.{c,h}, gprs_gmm_fsm.{c,h}
- 3GPP TS 24.008:
- section 6 "Support for packet services"
- section 9.5 "GPRS Session Management Messages"
- 3GPP TS 24.007:
- section 6.5.1 "Session Management Services for SMREG-SAP"
- section 9.5 "Services provided by the GMM for GPRS services"
- osmo-sgsn.git gprs_sm.{c,h}
Updated by pespin about 16 hours ago
- Status changed from New to In Progress
- Assignee set to pespin
- % Done changed from 0 to 20
I can already play with the modem app sending GMM messages and advancing a bit with FSMs in the GPRS Attach procedure with following patches:
https://gerrit.osmocom.org/c/libosmo-gprs/+/32021 gmm: Initial implementation of GPRS Attach
https://gerrit.osmocom.org/c/osmocom-bb/+/32022 layer23: modem: Test GMM layer through VT
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