Collision Handling for Path Update during Bearer Creation

Feature Summary and Revision History

Summary Data

Applicable Product(s) or Functional Area

MME

Applicable Platform(s)

  • ASR 5500

  • VPC-DI

  • VPC-SI

Default Setting

Enabled - Always on

Related Changes in This Release

Not Applicable

Related Documentation

MME Administration Guide

Revision History

Revision Details

Release

Collision Handling for Path-Update during Bearer Creation support added.

12.12.15

First introduced.

21.14

Feature Description

MME supports processing of NSA path-update procedure under the following collision scenarios:

  • Collision between path-update and one or more dedicated-bearer creation initiated by network.

  • Collision between path-update and IM-EXIT procedure is in progress.

As part of the above collision handling, MME handles the ERAB-Setup response received from eNB as follows:

  • MME processes the ERAB-SETUP response received with cause "Interaction-With-Other-Procedures" from eNB and retries the ERAB-Setup again towards eNB.

  • MME processes the ERAB-SETUP response received when Create-Bearer procedure is in suspended state due to path-update in progress.

  • MME retries the ERAB-SETUP towards eNB after the successful completion of path-update procedure.