magesh annamalai project

8/2/2019 Magesh Annamalai Project

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MBMS in GSM Evolution

Systems

A Research Paper

Magesh Annamalai FAU Feeds Grad Student

Sr.Systems Engineer -Location Technology Group

T- Mobile USA

Bellevue, WA

Ph: (425)-748-2484 Email: [email protected]


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Contents

Introduction

MBMS Service Requirements

MBMS Functional architecture in GSM/GPRS System

System Aspects

MBMS Call Processing

End to End Signaling Procedures

Radio Resource management issues to support MBMS

Future Study - QoS issues in MBMS & PHY layer aspects Conclusion


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Goal of the Research Paper System Requirements evaluation to support MBMS in GSM

Architecture study

Technical Feasibility

Signaling aspects

Call Processing

RR aspects

MM aspects

Standardization aspects

End Goal: Product/Technology & Solutions Evaluation.


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MBMS System Architecture - Key Goals

Minimum network resource utilization in both access network and core

network.

Continuous delivery of multimedia information taking into

consideration of the mobility aspects.

Scalable and reliable service platforms

Efficient design of the Um interface (air interface)

Access Network independent platforms


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MBMSService/Platform Architecture

MS Radio

Network

Core

Network

Multicast Router

Content Platform

MBMS platform


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Multimedia Broadcast/Multicast Service (MBMS) Broadcast and Multicast are methods for transmitting data grams from

a single source to several destinations (point-to-multipoint).

Service defition: A unidirectional point-to-multipoint service in which

data is transmitted from a single source entity to a group of users in a

specific area.

Benefits:

Multiple users can receive the same data at the same time.

Better radio resource utilization for the wireless operator.

High bandwidth applications support.

MBMS supports 2 modes Broadcast mode

Multicast mode.


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MBMS modes

Broadcast Mode

unidirectional point-to-

multipoint transmission of

multimedia data (e.g. text,

audio, picture, video)

The broadcast mode is

intended to efficiently use

radio/network resources e.g.

data is transmitted over a

common radio channel.

Data is transmitted in thebroadcast service area as

defined by the network (Home

environment).

Multicast Mode

The multicast mode allows the

unidirectional point-to-

multipoint transmission of

multimedia data (e.g. text,

audio, picture, video) from a

single source point to a

multicast group in a multicast

service area.

Network to selectively transmit

to cells within the multicastservice area which contain

members of a multicast group.


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MBMS Broadcast Architecture


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MBMS Architecture - Multicast


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MBMSService Requirements

Home environment requirements

Wireless Network requirements

Service/Application requirements

User requirements

RAN requirements

- The procedure for MBMS MS multicast activation (Joining) shall be transparent to the GERAN.

- The MBMS Notification procedure shall be performed within the MBMS service area.- MBMS shall allow for efficient MS power consumption.

- MBMS data transfer shall be downlink only.


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Signaling Procedures

Processing Stages

Session initiation

MBMS notification MBMS resource allocation

MBMS data flow

MBMS session termination


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Call Processing

1. MBMS SESSION START REQUEST2. MBMS SESSION START REQUEST

4. MBMS SESSION START RESPONSE

11. MBMS Data

11. MBMS Data

11. MBMS Data

11. MBMS Data

11. MBMS Data

11. MBMS Data

11. MBMS Data

11. MBMS Data

11. MBMS Data

3. MBMS SESSION START REQUEST

GGSNSGSNBSSMS

MBMS ResourceAllocation

MBMS SessionRequest

MBMS Notification

5. (PACKET) PAGING REQUEST

8. IMMEDIATE ASSIGNMENT

7. (PACKET) CHANNEL REQUEST

9. MBMS SERVICE REQUEST

10. MBMS ASSIGNMENT

6. MBMS Notification


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MBMSRR Management principles

BSS decides whether:

- There are sufficient resources on the cell to allocate an point-to-multipoint channel; or

- It is efficient to allocate a point-to-multipoint channel depending on if there is a legacy TRX

controlling the cell i.e. no CFCH support; and

- There is to be another transmission of the MBMS session.

BSC sends an MBMS ASSIGNMENT message to all the mobiles

listening to the (P)AGCH that are waiting for the MBMS assignment.

RR Management is very critical aspect for the MBMS system realization.The standardization is not completed yet!.


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MBMSMM Protocol aspects

Routing Area Update

Cell Change


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MBMSUser Plane Protocol Stack

Mobile BS

PDCP

PHY PHY

MAC

Controller

(BSC)

MAC

RLC

PDCP

RLC


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MBMSControl Plane Stack

UE Node B

RRC

PHY PHY

MAC

Controlling

RNC

MAC

RLC

RRC

RLC


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Functional Areas for future consideration

QoS aspects

Security

Traffic aspects

Phy layer impacts Application domain

MBMS Platforms support


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References

3GPP Specifications

IEEE communications


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Thank You !

magesh annamalai project

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