Table of Contents
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
In the previous document, “EMM Case 6. Handover without TAU – Part 2. Overview of X2 Handover” , we have discussed the procedures related to an X2 handover that is performed solely by two eNBs.
This document will focus on procedures for an S1 handover performed between two eNBs with intervention of EPC. As in X2 handovers discussed previously, we will assume both source and target eNBs are connected to the same MME/S-GW (intra-LTE environment), 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 S1 handover, and
Chapter 3 provides detailed procedures of S1 handover. Finally,
Chapter 4 will summarize how information elements in EPS entities are different before and after the handover.
Excellenbt details to make everythings clear and easy to understand.
Looking forward to similiar document for CSFB to 3G/2G and VoLTE Call Setup.
So good!But a question,why not use C/D instead B/A? Because C/D+RRC=E-RAB
Thanks for your detail document. Can you publish document relating inter-RAT handover