Mobility Management for Multicast Sessions In a UMTS-IP Converged Environment

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 ChiuDate: March 8, 2006

Outline

• Introduction

• MBMS Service Description

• UMTS Extensions for MBMS

• MBMS Support in Converged UMTS-IP Environment

• Conclusions

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

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

MBMS Service Description-Network Architecture

MN Node B

Node B

RNC

RNC SGSN

SGSN

HLR

GGSN

Multicast Service

BG

BM-SC

3PP

Multicast Service

IP Network

Core Netwrok

MBMS Service

• Subscription• Service Announcement• Joining - Bearer Activation• Session Start• Notification• Data Transfer• Session Stop• Leaving - Bearer Deactivation

MBMS Contexts

Standby

Active

No resource allocation

Resource reservation and transfer

UMTS Extensions for MBMS--Idle Mode

Node BNode B

Node BNode B

Node BNode B

Node BNode B

SGSN1

SGSN 2

RAI 1RAI 2

RAI 3

RAI 4

RA 1

RA 2

RA 3

RA 4

•RA: Routing Area

•RAI: Routing Area Identifier

•RAU: Routing Area Update

LARAURAPA

Relocation Procedure

UMTS Extensions for MBMS--Connected Mode

Register

De-Register

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.

Target Network Architecture

• RASH: executing MIP function and traditional PS service– Hide radio access technologies– Terminate the access stratum and the non-access

stratum

RASN Relocation UE

SourceRNC

Target RNC

OldRASN

New RASN

HomeRASN

IP Core Router

1. lu bearer relocation form source RNC to target RNC and from lod RASN to new RASN

2. Temporary CN MBMS bearer establishment

3. lu bearer relocation completion- conditional release of the path from the UE to the old RASN via source RNC

4. router advertisment

5. Support of unicast mobility (MIPv6 binding update)

6. MLD unsolicited report

8. Routing area update

7. IP multicast routing signaling

9. Temporary CN MBMS release

10. IP multicast routing signaling

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.