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RAU procedure in LTE | Routing Area Update procedure in LTE

This page describes RAU procedure used in LTE system. RAU stands for Routing Area Update in LTE system. It mentions RAU procedure without S-GW change and with S-GW change.

RAU procedure without S-GW Change

RAU Procedure without SGW change

The figure-1 depicts message flow between E-UTRAN entities during RAU procedure without S-GW (Serving Gateway) Change.

RAU procedure with S-GW Change

RAU Procedure with SGW change

The figure-2 depicts message flow between E-UTRAN entities during RAU procedure with S-GW (Serving Gateway) Change.

REFERENCE:
3GPP TS 23.401 version 11.3.0 Release 11

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