1. Mobility Management for Multicast Sessions In a UMTS-IP Converged Environment
Leoleis, G.; Dimopoulou, L.; Nikas, V.; Venieris, I.S.
ISCC 2004.
Advisor: Yuh-Shyan Chen
Student: Kau-Lin Chiu
Date: March 8, 2006

2. Outline Introduction MBMS Service Description UMTS Extensions for MBMS
MBMS Support in Converged UMTS-IP Environment
Conclusions

3. Introduction
Multicasting appears as a straightforward solution to facilitate one- or many-to-many delivery of packet switched service.
In B3G network, the UMTS core network are replaced by pure IP mobility and multicast functionality

4. Multimedia Broadcast/Multicast Service
MBMS is defined as a network layer UMTS service that adopts a unidirectional (downstream) point-to-multipoint data delivery mechanism.
The Broadcast-Multicast Service Center (BM-SC)
Control information flows exchanged with 3PP of MBMS data
Manage AAA information associated with third parties

5. MBMS Service Description- Network Architecture

6. MBMS Service Subscription Service Announcement
Joining - Bearer Activation
Session Start
Notification
Data Transfer
Session Stop
Leaving - Bearer Deactivation

7. MBMS Contexts Standby No resource allocation Active
Resource reservation and transfer

8. UMTS Extensions for MBMS-- Idle Mode
RAI 1
RAI 2
RAI 3
RAI 4
RA 1
RA 2
RA 3
RA 4 LA RA
URA
RA: Routing Area
RAI: Routing Area Identifier
RAU: Routing Area Update PA

9. Relocation Procedure

10. UMTS Extensions for MBMS-- Connected Mode
Register
De-Register

11. MBMS Support in Converged UMTS-IP Environment
The UMTS CN towards a fully IP-based mobile-aware network, a hybrid mobility management model based on both UMTS and Mobile IPv6 (MIPv6) mechanisms is proposed.

12. Target Network Architecture
RASH: executing MIP function and traditional PS service
Hide radio access technologies
Terminate the access stratum and the non-access stratum

13. RASN Relocation

14. Conclusions
this paper has described the principles of the multicast mode MBMS architectural.
Inter-RASN mobility to multicast sessions is provided through the specified RNS relocation procedure enhanced with the establishment of a short time tunnel for preventing packet loss.