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Table of Contents 1. Introduction 2. EMM Case 10. Move to Another City 3. EMM Case 11. Initial Attach in Another City 4. EPS Entity Information 5. Closing 1. Introduction UE attempts a handover or cell reselection when the received signal strength from its serving cell becomes weak as it moves. If there is no neighbor cell at all near the travelling UE,...
06/11/2014
90,635
Table of Contents 1. Introduction 2. EMM Case 8. Handover with TAU 3. EMM Case 9. Cell Reselection without TAU 4. EPS Entity Information 5. Closing 1. Introduction When UE accesses the network, a group of Tracking Areas (TAs) is assigned by the network (MME) through the Tracking Area Identity (TAI) list. The UE then can move within these TAs without hav...
05/07/2014
106,995
Table of Contents 1. Introduction 2. Cell Reselection: Required System Information and Criteria 2.1 Overview of Cell Reselection Procedure 2.2 System Information 2.3 Cell Reselection Criteria 3. Cell Reselection without TAU 4. EPS Entity Information: Before/After Cell Reselection without TAU 5. Closing 1. Introduction Through the three compa...
04/23/2014
102,010
Table of Contents 1. Introduction 2. Concept of S1 Handover 2.1 S1 Protocol Stacks 2.2 S1AP Procedures and Messages Relating to Handover 2.3 S1 Handover Procedure at a Glance 2.4 UE State and Connection Information Before and After S1 handover 3. Procedure of S1 Handover 4. EPS Entity Information: Before/After S1 Handover 5. Closing 1. Intro...
04/08/2014
128,531
Table of Contents 1. Introduction 2. Concept of X2 Handover 2.1 X2 Protocol Stacks 2.2 X2AP Functions 2.3 X2 Messages Relating to Mobility Management Function 2.4 X2 Handover Procedure at a Glance 2.5 UE State and Connection Information Before and After X3 handover 3. Procedure of X2 Handover 4. EPS Entity Information: Before/After X2 Handover 4.1 Before...
03/21/2014
132,743
Table of Contents 1. Introduction 2. Overview of LTE Handover 2.1 Measurement 2.2 Handover Decision 2.3 Handover Prodedure 2.4 Handover Interruption Time 2.5 Mobility Robustness Optimization 3. Closing 1. Introduction This document describes the handover procedure defined as EMM Case 6 in our technical document, “Eleven EMM C...
03/06/2014
100,223
Table of Contents 1. Introduction 2. Concept of Periodic TAU 3. Procedure of Periodic TAU 4. EPS Entity Information: Before/After Periodic TAU 4.1 Before Periodic TAU 4.2 After Periodic TAU 5. Closing 1. Introduction This document describes the periodic TAU (Tracking Area Update) procedure defined as EMM Case 5 in our technical document, “...
02/19/2014
111,714
Table of Contents 1. Introduction 2. Cases of Service Request 3. UE-triggered Service Request 4. Network-triggered Service Request 5. EPS Entity Information: Before/After Service Request 6. Closing 1. Introduction This document describes the service request procedure defined as EMM Case 4 in our technical document, “Eleven EMM Cases in an EMM Sce...
02/09/2014
164,290
Table of Contents 1. Introduction 2. S1 Release due to User Inactivity 3. EPS Entity Information: Before/After S1 Release 3.1 Before S1 Release 3.2 After S1 Release 4. Closing 1. Introduction This document will describe procedures for releasing S1 connection when a UE becomes inactive, as in EMM Case 3 defined in our technical document, “Eleven...
01/25/2014
122,787
Table of Contents 1. Introduction 2. Cases of Detach 3. UE-initiated Detach 4. MME-initiated Detach 5. HSS-initiated Detach 6. EPS Entity Information: Before/After Detach 7. Closing 1. Introduction This document discusses detach procedures defined as EMM Case 2 in our previous document, “Eleven EMM Cases in an EMM Scenario”[1]. During th...
01/21/2014
174,074
Table of Contents 1. Introduction 2. Initial Attach Procedure 2.1 IMSI Acquisition 2.2 Authentication 2.3 NAS Security Setup 2.4 Location Update 2.5 EPS Session Establishment 3. EPS Entity Information 3.1 Before Initial Attach 3.2 After Initial Attach 4. Closing 1. Introduction N...
01/16/2014
441,393
Table of Contents 1. Introduction 2. Cases of Initial Attach 2.1 Unknown UE 2.2 Known UE 3. Simplified Call Flow in Each Case 4. Closing 1. Introduction This document discusses initial attach, as defined as EMM Case 1 in our previous document, “Eleven EMM Cases in an EMM Scenario” [1]. During this phase, a user turns on hi...
12/26/2013
200,826
Table of Contents 1. Introduction 2. EPS Mobility Management (EMM) Scenario 3. Closing 1. Introduction This document and its subsequent documents will provide descriptions of specific EMM procedures based on our understanding of EMM and ECM/RRC states covered in our LTE technical document, “LTE EMM and ECM States” [1]. EMM features are explained in...
10/22/2013
87,585
Table of Contents 1. Introduction 2. EMM, ECM and RRC States 3. EMM State Transition 4. EMM Features 5. EMM User Information 6. Closing 1. Introduction Through the previous technical documents, we have studied the LTE network architecture and LTE identifications, the fundamentals of LTE technology, and LTE security operation required for a user to...
09/20/2013
264,281
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