EPS to 5GS Mobility Enhancement

Feature Summary and Revision History

Summary Data

Applicable Product(s) or Functional Area

MME

Applicable Platform(s)

  • ASR 5500

  • VPC-DI

Feature Default

Disabled - Configuration Required

Related Changes in This Release

Not Applicable

Related Documentation

Command Line Interface Reference

Revision History

Revision Details

Release

The release-s1-s11-on-timer-expiry-upon-clr CLI configuration allows MME to wait for the resource release timeout to expire.

21.25.12

Feature Changes

Previous Behavior: During Evolved Packet System (EPS) to 5GS Mobility registration (TAU), when the MME receives the Cancel Location Request (CLR), S1 and S11 resources are released instantly.

New Behavior: During EPS to 5GS Mobility registration (TAU), when you configure the release-s1-s11-on-timer-expiry-upon-clr CLI, and when MME receives CLR with MME UPDATE PROCEDURE, then MME waits for the ho-resource-release-timeout to expire and releases S1 and S11 resources. If it is not configured, and when MME receives CLR with MME UPDATE PROCEDURE, then MME instantly releases S1 and S11 resources.


Note

The changes are applicable only to N26 and have no impact on S10.

Command Changes

Use the following configuration to allow MME resource timeout to expire.

configure 
   context context_name 
      mme-service service_name 
         [ no ] release-s1-s11-on-timer-expiry-upon-clr 
   end

NOTES:

  • release-s1-s11-on-timer-expiry-upon-clr : MME to wait for timer expiry after receiving a Cancel Location Request (CLR) from the HSS for EPS to 5GS Mobility registration procedure before releasing S1 and S11.

  • no : MME releases resources instantly when CLR is received.