NAS Notification for SRVCC Cancellation due to TAU Request

Feature Summary and Revision History

Summary Data

Applicable Product(s) or Functional Area

MME

Applicable Platform(s)

  • ASR 5500

  • VPC-DI

  • VPC-SI

Feature Default

Enabled –Always on

Related Changes in This Release

Not applicable

Related Documentation

MME Administration Guide

Revision History

Revision Details

Release

In this release, MME supports NAS notification to reestablish IMS for SRVCC Cancellation.

21.11.16

In this release, MME supports NAS notification to reestablish IMS for SRVCC Cancellation.

21.5.26

First Introduced

21.17.6

Feature Changes

Previous Behavior: MME does not send NAS Notification to reestablish IP Multimedia Subsystem (IMS) for SRVCC Cancellation due to TAU request even after MSC sends PS_TO_CS_CANCELLATION_ACK with STI flag set.

New Behavior: MME sends NAS notification to reestablish IMS for SRVCC Cancellation due to TAU request. This notification is sent irrespective of receiving PS_TO_CS_CANCELLATION_ACK with STI flag set, which is received from MSC.