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IEEE 802.21 MEDIA INDEPENDENT HANDOVER

DCN: 21-09-0016-00-bcst Title: HBSG Requirements and Use Cases

Date Submitted: January, 2009Presented at IEEE 802.21 session #30 in LAAuthors or Source(s):

Juan Carlos Zuniga (InterDigital) j.c.zuniga@ieee.orgJens Johann (Deutsche Telekom) j.johann@telekom.de

Abstract: This presentation provides a background and status of the work carried out in the SG.

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 IEEE 802.21 presentation release statementsThis document has been prepared to assist the IEEE 802.21 Working Group. It is offered

as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.

The contributor grants a free, irrevocable license to the IEEE to incorporate material contained in this contribution, and any modifications thereof, in the creation of an IEEE Standards publication; to copyright in the IEEE’s name any IEEE Standards publication even though it may include portions of this contribution; and at the IEEE’s sole discretion to permit others to reproduce in whole or in part the resulting IEEE Standards publication. The contributor also acknowledges and accepts that this contribution may be made public by IEEE 802.21.

The contributor is familiar with IEEE patent policy, as stated in Section 6 of the IEEE-SA Standards Board bylaws <http://standards.ieee.org/guides/bylaws/sect6-7.html#6> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/faq.pdf> 

802.21b History Recapitulation

• Background information

• July’s 2008 Tutorial (DVB, DMB, MediaFLOTM)

• Scope of 802.21b

• PAR definition

• Possible solutions

• Food for thought…

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Background Information

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Background• IEEE 802 Tutorial on Handovers with Broadcast Technologies given during July‘s 2008

meeting in Denver • Media independent handover information between independent technologies• Support in different types of devices• Addressing several Use Cases for service and network providers

• Technology‘s State of the art: 3GPP + DVB/ MediaFLO/ DMB– Covers partially uplink channel problems and the coverage problems– Commercial products capable of rudimentary handovers between 3GPP and DVB-H

• DigitalTV coverage problem exists in Europe• DVB does not have full coverage for ubiquitous mobile TV service• DVB Project looking at WLAN as a solution to the indoor problem• 802.11aa looking at using WLAN for video streams transport

• New 802.21 Task Group to focus on Handovers with Broadcast Technologies • Soon to be approved

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Broadcast World

DVBDMB

DVB

DVB

DVB

DMB

DMB

DVB

MediaFLO

DVB

DVB

DMB

DVB

DVB

DMB

6

MediaFLO

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7

Mobility Convergence

ConvergedDevice

VoIPServer

Instant Messaging

Server GamingServer

MobilityWLAN802.1

1

Cellular UMTS

WiMax802.16

ConvergedDevice

Internet

IMS

• Seamless mobility between multiple radio technologies

• IP-based protocols and networks• Always connected for Content and

Web services • Also needs:

• Support for evolving usage models • Upgradeable for future more

capable devices • Minimal or no user interventionTV Broadcast

Service Provider

Network Provider

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Hybrid Networks• Both Broadcast and Communications networks can benefit

from each other

• WiMAX, WLAN, 3GPP/3GPP2 network operators can benefit from:

• Multicasting with much better quality, to a larger set of customers with one transmitter

• Market penetration with little investment• DVB-H supported by the EU commission as the mobile TV standard• 20 billion € expected revenue in 2011 (2M subscribers in 2006, 6M in 2007)

• Use of existing broadcasting brands and new services

• Broadcast network operators can benefit from:

• Virtual bidirectional channel and AAA support• Enabling more services

• Customized advertisements, Mobile TV, live polls, purchase banners, interactive games, chat services, webcasting, file transfers, etc.

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Converged Devices and Standards

• In the following years we will see the dominance of more services relying on hybrid networks

• Devices capable of DVB-H, WLAN, UMTS are already available

• Fixed Mobile Convergence Alliance (FMCA) started interoperability Work Item on IEEE 802.21 MIH in June 2008

• Interactive mobile TV standard for a common user interface with a media independent Java API (JSR 272) is also there

• Open Mobile Alliance (OMA) Mobile Broadcast Services Enabler Suite (BCAST) supports DVB-H, 3GPP MBMS, 3GPP2 and mobile unicast streaming systems at the application layer

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Service Provider

Mobile Network Operator

Content

Provider

Content Aggregat

or

Content Creation

Service ManagementOMA BCAST

BroadcastNetwork(DVB)

IEEE 802.11(WLAN)Network

IEEE 802.16 (WiMAX)Network

Cellular(3GPP)

TV Guide File ContentService

Meta DataContent Creation

Service Management

Shop Front End

Service Application

Managem

ent

DRM

Playout Management

Live C

ontent

Broadcast Operator

Broadcast

Managem

ent

Broadcast Service Network Example

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Scope of 802.21b

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802.21b PAR (1/2)

• “This amendment defines mechanisms that enable the optimization of handovers between IEEE 802.21 supported technologies and downlink-only (DO) technologies.”

• “The purpose of this standard is to improve user experience by developing mechanisms that facilitate handovers between IEEE 802.21 supported technologies and DO technologies.”

• “Downlink-only technologies such as Digital Video Broadcasting (DVB), Terrestrial Digital Multimedia Broadcasting (T-DMB) and Media Forward Link Only (MediaFLOTM) are becoming more widespread in use. There is a need to support optimized handovers between these technologies and other technologies already supported by IEEE 802.21. Currently, there is no standard which specifies such handovers.”

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802.21b PAR (2/2)

• “IEEE 802.21 defines mechanisms that enable handovers across various technologies such as IEEE 802 and 3GPP/3GPP2. These same mechanisms can be used for handovers with DO technologies. However, this requires enhancements to the IEEE 802.21 specification.

• The enhancements may include:

• Extensions of IEEE 802.21 primitives and protocol to support handovers with DO technologies.

• Definition of Media dependent SAP(s) and corresponding mapping of MIH link layer primitives for DO technologies.”

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Possible solutions

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Possible Approach for 802.21b

3GPP/3GPP2 Network

MIH Function

802 Network

MIH Function

MIH Users

802 Interface

Mobile Node

802 Interface

DATA

MIH Function

3GPP/ 3GPP2

Interface

MIH Users Higher Layer

Transport MIH

Users Higher Layer Transport

Higher Layer Transport

Legend

MIH Message Transport MIH Local Interface

DATA MGMT MGMT DO Network

MIH Function

MIH Users Higher Layer

Transport

DO Interface

L3 MIH Message Transport (IETF MIPSHOP)

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Food for thought (1/2)

• Use Cases to be addressed:

• Coverage extension• DVB / DMB / MediaFLO to WiMAX / WLAN / 3GPP

• Load Balancing • Number of unicast subscribers justifys setting up a

bradcast service to hand them over• Bidirectional channel

• Support for interactive services

• IP services only?• Otherwise problem is hard to solve

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Food for thought (2/2)

• Is any support required in other wireless interfaces?

• WiFi, WiMAX, Cellular