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IEEE 802.21 MEDIA INDEPENDENT HANDOVER

DCN: 21-08-0089-00-0000 Title: DVB-H Integration

Date Submitted: March, 2008Presented at IEEE 802.21 session #25 in OrlandoAuthors or Source(s):

Burak Simsek (Fraunhofer Institute)Juan Carlos Zuniga (InterDigital)Peter Pogrzeba (Deutsche Telekom)Teodor Buburuzan (Technical University of Braunschweig)Patrick Stupar (NEC) Michelle Wetterwald (Eurecom)Michael Grigat (Deutsche Telekom)Jens Mödeker (Fraunhofer Institute)Andreas Sieber (IRT)

Abstract: This presentation summarizes DVB-H characteristics and describes the service discovery procedure of DVB-H.

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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 outlined in Section 6.3 of the IEEE-SA Standards Board Operations Manual <http://standards.ieee.org/guides/opman/sect6.html#6.3> and in Understanding Patent Issues During IEEE Standards Development http://standards.ieee.org/board/pat/guide.html> 

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> 

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Summary

• DVB … A broadcast dedicated technology

• DVB-H is based on DVB-T standard but designed for small, portable devices like Mobile Phones.

• Optimized reception in mobile environments through new modulation and error correction mechanisms (better signal quality)

• By the use of time-slices it is perfect suited for small, battery-powered devices

• Advantages• Unlimited number of receivers• Up to 40 km coverage per transmitter• Around 20 AV streams with 300kbps• Hence an efficient technology for popular multimedia services• More than 80 manufacturers

• Intel, Nokia, Motorola, Samsung, Alcatel-Lucent,…

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Summary

• DVB supports IP since 2006 with IP Datacast

• DVB IP Datacast is a Service Provisioning Framework designed to provide IP based services over DVB-H

• Purchase and billing, service description, schedule and acquisition…

• Developed by the DVB CBMS (Convergence of Broadcast and Mobile Services ) Working Group

• This is the group IEEE 802.21 should cooperate with• Chairman: Georges Martinez (Motorola)• Most active partners: Nokia, Motorola, Philips, Samsung, France Telecom,

Siemens, Thomson, Expway, NDS…• There is a liasion to OMA BCAST

• Prof. Reimers: “In my capacity as Chairman of the Technical Module of the International DVB Project, I strongly support the inclusion of DVB-H in IEEE 802.21… It is clear that numerous companies are working on the integration of 3G networks and this additional DVB-H broadcast downstream into "hybrid" network structures. The IEEE would therefore be well advised to incorporate certain broadcast technologies in IEEE 802.21.”

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SUMMARY

Berlin

Munich

Frankfurt

Should be realized until 2011

To cover 36 regions of Germany and some smaller areas

About 45% population coverage (36 Mio people)

A nation wide DVB-H coverage is not planned

(Source Deutshce Telekom)

Interim target scenario

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TV/radio transmission

FTA (free-to-air) or encrypted transmission

H.264 streaming

TV with auxiliary data i.e. text or data elements for interaction

No synchronization of data elements with A/V stream

Time shifting

Rich media services with advanced interactivity

A/V stream includes additional data streams

Synchronization of data streams with A/V stream

User triggered download of any kind of content via broadcast Ring Tones Music Maps A/V clips Games…

SUMMARY

Mobile TV/Radio

Mobile TV with synchronized, auxialiary data

stream

Interactive mobile TV

File Download

Require bidirectional channels

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Content

Provider

Content Aggregat

orMobile Broadcast Service Provider

Mobile Network Operator

TV Guide File ContentService

Meta Data

Content Creation

IPDatacast Management

Shop Front End

Se

rvice A

pp

licatio

n M

an

ag

em

en

t

DRM

Playout Management

Live C

on

tent

Broadcast Platform

IPTV Platform

DVB-HBroadcastNetwork

IEEENetwork

Content Creation

OMA BCAST

Mob

ile T

erm

inal

Broadcast Operator

Src: Télédiffusion de France (media&broadcast)

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DVB-H Interest and Timeline

• Initial presentation to 802.21 WG made in November’s 07 meeting

• Hybrid Broadcast/Mobile Networks composed of 3GPP and IEEE technologies have significant financial advantages for all mobile network operators

• Initial mobile TV services using hybrid networks in different countries have shown that customer acceptance is very high

• European Commission declared DVB-H as the official standard of Europe for mobile broadcasting

• IEEE 802.21 is well in the place of enabling optimized cooperation of hybrid networks

• Second presentation to 802.21 WG made in January’s 08 meeting

• Use cases for 802.21 with DVB-H• DVB-H as all the other wireless technologies has Cos and Pros

necessitating handovers• There are only minimal changes needed to integrate

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DVB-H Interest and Timeline

• Straw poll in January 08 meeting showed there is relevant work to be done in 802.21 for DVB Handovers

• 21 yes, 1 no, 1 abstain

• Motion accepted in January 08 to appoint Burak Simsek as the liaison between 802.21 WG and the DVB Forum

• Teleconference held in with Prof. Reimers (DVB Chair Technical Module ) in February 08

• DVB Forum has assigned agenda time in June’s meeting for 802.21 presentation

Technical Module (Chair Prof. Reimers … TU Braunschweig) CBMS (Chair Georges Martinez … Motorola) Mobility Task Group (Chair Gunther May … TU Braunschweig) Juan Carlos Zuniga will be making the presentation Liaison follows the presentation

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Future Work

• Create a Study Group

• Purpose• To determine what work, if any, is necessary to enable

DVB-H Handovers to other wireless technologies

• Study group will consider• Handset, network and service provider input• Specific requirements in 802.21 to support DVB-H

handovers• Existing work in this area

• Goals and Timeframe• Keep agenda time to a minimum and hold most discussions over

email and teleconferences• 2 plenary cycles

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Straw Poll

• Would you like to see the creation of an IEEE 802.21 Study Group for supporting broadcast handovers?

Yes 27

No 0

Abstain 8

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Thanks For Your Attention

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Back up slides

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Service Discovery in DVB-H

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Handover from X to DVB-H

• Popular Multimedia Services, hence unidirectional

• Handover is triggered by some means from X to DVB-H

• What kind of information do we need in order to switch to the same IP Stream?

• Without any prior information it is possible to have this information but takes too long…

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DVB-H Transport Structure

Here are the IP streams

TV Channels

Broadcasters

DVB-H Network Providers

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Scanning / TuningFinding the network

• Worst case: Whole Frequency scanning (e.g. 470MHz – 862MHz)

• NIT_actual – NIT_other • Reduces the frequencies to be scanned to a

specific list• If does not exits, either found

frequencies are used or whole scan is carried on

• For each found network, accomplish tuning

• Search within transport stream if the service exits or not…

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How to Locate ServiceIdentify IP Streams

• We should know what we are looking for in DVB-H language…

• IP Platform: A set of IP/MAC streams and/or receiver devices managed by an organization

• The IP/MAC platform concept allows for the coexistence of several non-harmonized IP/MAC address spaces on the same DVB network.

• Two IP streams carry the same IP datagram stream if all the following conditions are true:

• Source IP addresses are identical.• Destination IP addresses are identical.• IP streams are associated with the same IP platform.• Destination IP address is not in unicast range,

• Multicast Addresses in DVB-H are globally defined

• Need IP matching since IP addresses are different in IP Platforms…

• From unicast/multicast to multicast

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How to Locate IP StreamsElementary Stream Structure

Header Payload

4 bytes

188 bytes

Header Payload PayloadHeader

Syncbyte

Transporterror

indicator

Payloadunit startindicator

Transportpriority PID

Transportscrambling

control

Adaptationfield

control

Continuitycounter

Adaptationfield

8 1 213 41 1 2

Packet IDentifier

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How to Locate IP StreamsFinding True PID

PAT (pid=0)

1 100

2 200

3 300

4 400

10 A 1000

11 V 1100

12 D 1200

13 D 1300

PMT (for pid=200)

Service_id

pmt_pid

elementary_pid

stream_type

component_tag

AAAGASDGJHGHMHSHAGAAAAAAAAAAA

VJDGHDGHKGHKFGHKFGRTUWRTZWWRZ

HGJDGHNVBNRSTHWRTHWRTHWRTHRTH

GHSHGJJJFGDDDDDDDDDDDDDDDDDDD

Multiplex

ServiceComponentelementary_stream (pid=1000)

Program Association Table

Program Map Table

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1. Find NIT_actual of the tuned network

2. Find NIT_actual of the new network which includes INT link_descriptor

3. Find service ID of INT table of the platform we are interested in

4. Find the PID of the INT table for the PMT

5. Find the PID of the IP service (based on the IP Address) from INT

6. Find the PID of the IP Service for the PMT

7. Find PID of the elementary stream (IP Stream)

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Parameters for Optimum Handovers withDVB-H

Parameters Source Remarkcell_id TPS bits Uniquely cell identifier for DVB-T/H

cell_list_descriptor NIT To announce cells and sub-cells of the DVB-H network

cell_frequency_link_descriptor NIT To announce all frequencies used to transmit the TS within the DVB network

original_network_id NIT typically allocated by DVB on a per country basis

network_id NIT

transport_stream_id PAT Identifies uniquely an TS within an “original” DVB network

linkage_descriptor NIT to announce INT

service_id PMT Identifies a DVB service

component_tag Identifier for a component of a DVB service

Platform_id INT identifies an IP platform

IP source/destination address INT Identifies a single IP stream

PID PAT/PMT Identifier for component_tag

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IP Matching

• Platform_id and IP source/destination addresses must be available in case there is no PID available

• Multicast IP addresses are uniquely defined, hence IP addresses can be saved before

• ESG (Electronic Service Guide) of DVB-H provides IP Platform ID and IP Address of all available service…

• MIIS can provide with the ESG similar data enabling faster IP Platform ID – IP address information acquisition

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Handover Overview XDVB-H

• In case service exists over DVB-H make handover decision

• Else DAIDALOS could consider creating the service in case of demand, but currently DVB-H would not…(no .21 problem)

• They target customized services as the next steps…

• No resource availability check (avoid this)

• Inform DVB Network about the handover complete (optional)

• Inform WLAN Network about handover complete (optional)

• Multicast leave can be synchronized with this information