UTRAN to E-UTRAN Handover

This chapter describes the following topics:

Feature Summary and Revision History

Summary Data

Applicable Product(s) or Functional Area

SGSN (S4-SGSN)

Applicable Platform(s)

  • ASR 5000

  • ASR 5500

  • VPC-DI

  • VPC-SI

Feature Default

Enabled - Configuration Required

Related Changes in This Release

Not Applicable

Related Documentation

  • Command Line Interface Reference

  • SGSN Administration Guide

  • Statistics and Counters Reference

Revision History

Revision Details

Release

First introduced.

This feature is available in 21.5.10 and 21.9 releases.

21.5.10

Feature Description

The UTRAN to E-UTRAN Handover feature is used to check and avoid including the RAB IDs in the "Relocation Command" message. When this feature is enabled, the SGSN includes the RAB IDs in the "RABs To Be Released List" IE in the "Relocation Command" message if the MME does not include the F-TEID information in the "Forward Relocation Response" message (existing behavior).

When this feature is disabled, the SGSN will not include the following IEs in the "Relocation Command" message if the MME does not include the F-TEID information.

  • RABs Subject To Data Forwarding List

  • RABs To Be Released List

Configuring UTRAN to E-UTRAN Handover

This section describes how to configure UTRAN to E-UTRAN Handover feature.

Configuring eNodeB Data Forwarding

Use the following configuration to configure enable forwarding of data from the RNC to eNodeB. 

configure 
   context context_name 
      iups-service service_name 
         rnc id rnc_id 
            [ no ] enb-data-forward 
            end

NOTES:

  • iups-service service_name : Creates an IuPS service instance and enters the IuPS Service Configuration mode. This mode defines the configuration and usage of IuPS interfaces between the SGSN and the RNCs in the UMTS radio access network (UTRAN).

    service_name specifies the IuPS service name as a unique alphanumeric string of 1 through 63 characters.

  • rnc id rnc_id : Sets the identification number of the RNC configuration instance. rnc_id must be an integer from 0 to 65535.

  • enb-data-forward : Enables the forwarding of data from this RNC to eNodeB.

  • no : Disables the forwarding of data from this RNC to eNodeB.

  • This command is enabled by default.

Monitoring and Troubleshooting

This section provides information on show commands and their corresponding outputs for the UTRAN to E-UTRAN Handover feature.

Show Commands and Outputs

show iups-service all

The output of this command includes the "E-NodeB Data Forwarding" field to indicate whether eNodeB Data Forwarding support is enabled or disabled.