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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

88,349

Technical Documents

Understanding the Basic Operations of DHCP

Table of Contents I. Introduction II. IP Address Allocation/Lease Procedure III. IP Address Renewal Procedure IV. IP Address Release Procedure V. Summary VI. Closing Appendix A - Format of DHCP Messages in IP Address Allocation/Lease Procedure Appendix B - Format of DHCP Messages in IP Address Renewal Procedure Appendix C - Format of DHCP Me...

10/23/2013

341,229

Technical Documents

Core Network Evolution - How CUPS changes the Call Flow?

Karim Rabie Senior PS Core / EPC Consultant at Saudi Telecom Company All Articles by Karim Rabie How to contribute your article to Netmanias.com ! List of Contributors...

04/02/2018

91,482

Technical Documents

EMM Procedure 1. Initial Attach - Part 2. Call Flow of Initial Attach

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

443,818

Technical Documents

LTE EMM and ECM States

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

266,711

Technical Documents

LTE IP Address Allocation Schemes I: Basic

Table of Contents 1. Introduction 2. Types of IP Address Allocation 3. Dynamic IP Address Allocaion 4. Static IP Address Allocation 5. Closing 1. Introduction LTE networks are all-IP networks. This means that they deliver all user traffic in IP packets, and provide users with “always-on IP connectivity”. When UE joins a...

02/13/2015

188,364

Technical Documents

LTE Charging I: Offline

Table of Contents 1. Introduction 2. Overview of Offline Charging 3. Offline Charging Procedure 4. Parameters for Charging Data Record (CDR) 5. Closing 1. Introduction In the previous PCC document [1], our main focus in discussing PCC rules was on QoS rules. Now, this document puts more focus on charging rules, specifically offline charging rules. In...

02/02/2015

101,149

Technical Documents

EMM Procedure 6. Handover without TAU - Part 2. X2 Handover

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

134,011

Technical Documents

Understanding DHCP Proxy Agents and Security

Table of Contents I. Overview II. Introduction to DHCP Proxy Agents III. Basic Operations of DHCP Proxy Agents IV. Security Functios of DHCP Proxy Agents V. Summary and Closing Appendix A - Format of DHCP Messages in IP Address Allocation/Lease Procedure Appendix B - Format of DHCP Messages in IP Address Renewal Procedure Appendix C - Format of DHC...

11/07/2013

57,657

Technical Documents

Understanding DHCP Relay Agents

Table of Contents I. Overview II. Why are DHCP Relay Agents Needed in DHCP Operations ? III. Basic Operation of DHCP Relay Agents Appendix - Format of DHCP Messages in a Network with DHCP Relay Agents I. Overview This document provides a technical understanding of a DHCP relay agent that is required in a multi-subnet environment where a DHCP client...

11/05/2013

191,167

Technical Documents

LTE Security II: NAS and AS Security

Table of Contents 1. Introduction 2. NAS Security 3. AS Security 4. Security Context 5. Closing and References 1. Introduction In LTE Security I[1], Part I of the LTE Security technical document, we have discussed LTE authentication based on EPS AKA procedure and learned a UE and an MME get to share the KASME when authenticated. In this document, w...

08/05/2013

222,097

Technical Documents

LTE Security I: Concept and Authentication

Table of Contents 1. Introduction 2. LTE Security Concept 3. LTE Authentication Procedure 4. Closing and References 1. Introduction Wireless communication, in its nature, is always at a risk of eavesdropping or manipulation because data originally sent from/to a user may be received and unlawfully used by an unintended user. Locations or traveling routes...

07/31/2013

223,091

Technical Documents

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