Table of Contents
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
4.1 Before X2 Handover
4.2 After X2 Handover
In the previous document, “EMM Case 6. Handover without TAU – Part 1. Overview of LTE Handover” , we have discussed the procedures related to LTE handover, and learned that LTE handover is a “UE-assisted/network-controlled” process that is reported by UE, and determined by eNB.
This document will focus on procedures for X2 handover that is performed through the x2 interface in an intra-LTE environment. So, we will assume both source and target eNBs are connected to the same MME/S-GW, and are located in a TA that IS in the Tracking Area Identifier (TAI) list for the associated UE.
Chapter 2 describes the concept of X2 handover, and
Chapter 3 provides detailed procedures of X2 handover. Finally,
Chapter 4 will summarize how information elements in EPS entities are different before and after the X2 handover.
I wanted to know is it possible to have X2 link b\w two eNodeBs which are being controlled by two different MMEs.
Creation of X2 link is part of planning or it happens dynamically.