EMM Procedure 5. Periodic TAU

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Information about EMM Procedure 5. Periodic TAU
Technology

Published on February 19, 2014

Author: Netmanias

Source: slideshare.net

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Click the link to download a PDF file http://www.netmanias.com/en/?m=view&id=techdocs&no=6193

This document, as the fifth of the EMM Procedure series, will describe the periodic TAU procedure, as defined as EMM Case 5 in our technical document, “Eleven EMM Cases in an EMM Scenario”. This procedure is used when a UE, while staying inactive in ECM/RRC-Idle state, informs the MME of its current location (TAI, Tracking Area Identity) upon expiration of the periodic TAU timer. Between a UE and MME, no bearer (E-RAB) is set up, and only a signaling connection (ECM connection) is established. We will learn how the ECM connection is released and the UE returns to Idle state once a new TA is reported. We will also look into how information elements in EPS entities are different before and after the periodic TAU procedure.

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