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Feature #2583

closed

SGsAP Interface for LTE/ePC CSFB Support

Added by laforge over 4 years ago. Updated over 2 years ago.

Status:
Resolved
Priority:
High
Assignee:
Category:
-
Target version:
-
Start date:
10/19/2017
Due date:
% Done:

100%

Resolution:
Spec Reference:

Description

It would be great to support combined 2G+4G networks by having a SGsAP interface in our MSC/VLR.

This interface is used for circuit-switched fallback between the MME and the MSC/VLR.

It's not based on ASN.1 and also not using SIGTRAN. Rather' it's using GSM-style TLVs over plain SCTP. For a detailed specification, see 3GPP TS 29.118.

Let's use this ticket to document what it would take to add this to OsmoMSC.

For a high-level summary of how CSFB and SMS-over-SGs, see http://www.leliwa.com/downloads/CSFB_and_SMSoSGs.pdf


Subtasks 3 (0 open3 closed)

Feature #3613: SGsAP message encoding/decoding libraryClosedlaforge10/02/2018

Actions
Feature #3614: SGs integration tests in TTCN3Resolveddexter10/02/2018

Actions
Feature #3615: SGs subscriber state machineResolveddexter10/02/2018

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Related issues

Related to OsmoMSC - Feature #1599: Gs interface (BSSMAP+) between SGSN and MSC/VLRNew02/23/2016

Actions
Related to OsmoSGSN - Feature #1583: Gs interface (BSSMAP+) between SGSN and MSC/VLRNew02/23/2016

Actions
Actions #1

Updated by laforge about 4 years ago

See also SGs_Interface

Actions #2

Updated by laforge about 4 years ago

  • Related to Feature #1599: Gs interface (BSSMAP+) between SGSN and MSC/VLR added
Actions #3

Updated by laforge about 4 years ago

  • Related to Feature #1583: Gs interface (BSSMAP+) between SGSN and MSC/VLR added
Actions #4

Updated by laforge over 3 years ago

Actions #5

Updated by laforge over 3 years ago

  • Priority changed from Low to High
Actions #7

Updated by laforge over 3 years ago

  • Status changed from New to In Progress
Actions #8

Updated by laforge almost 3 years ago

  • Assignee changed from laforge to dexter
Actions #9

Updated by laforge over 2 years ago

  • Status changed from In Progress to Stalled
Actions #10

Updated by laforge over 2 years ago

  • % Done changed from 0 to 80
Actions #11

Updated by laforge over 2 years ago

  • Status changed from Stalled to Resolved
  • % Done changed from 80 to 100
Actions

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