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Feature #5468

open

osmo-mgw: 2g<->3g call support

Added by pespin almost 2 years ago. Updated over 1 year ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
-
Target version:
-
Start date:
02/28/2022
Due date:
% Done:

0%

Spec Reference:

Description

we recently improved support for IuUP in osmo-mgw (#1936, #1937, #2459) with proper state machine.
However, there are some issues we still need to solve related to codec negotiation/handling to be able to properly translate 2g<->3g calls (i.e. RTP AMR <-> IuUP).
The functions transcoding the payloads are already there (see MGCP_Tests.TC_two_crcx_mdcx_and_iuup_rtp), we just need to improve/fix all the logic to know what we send to another connection based on what it supports. This probably also needs some improved logic at osmo-msc.

The idea here is to, as a first step, get neels patches improving the SDP configuration, then look at this specific problem again with those changes applied.
Some thoughts/background can be found here:

Related issues

Related to OsmoMGW - Feature #1936: Implementation of IuUP SMpSDU modeResolvedpespin02/02/2017

Actions
Related to OsmoMGW - Feature #1937: Implement way how to handle IuUP on RTP endpointsResolvedpespin02/03/201702/03/2017

Actions
Related to OsmoMGW - Feature #2459: remove nano3G IuUP "Initialization ACK" hack when IuUP proxy is in placeResolvedpespin02/06/201702/06/2017

Actions
Actions #1

Updated by pespin almost 2 years ago

  • Related to Feature #1936: Implementation of IuUP SMpSDU mode added
Actions #2

Updated by pespin almost 2 years ago

  • Related to Feature #1937: Implement way how to handle IuUP on RTP endpoints added
Actions #3

Updated by pespin almost 2 years ago

  • Related to Feature #2459: remove nano3G IuUP "Initialization ACK" hack when IuUP proxy is in place added
Actions

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