3GPP2 Circuit-Switched Video Conferencing & Packet-Switched Video

Telephony Services OverviewScott Droste

Chair, TSG-C WG1 Applications & ServicesMotorola (scott.droste@motorola.com)

04 December 2006

Maui, HI USA

04 December 2006 2

Presentation Overview

• Development of video conferencing and telephony specifications within 3GPP2

• 3GPP2 Circuit-Switched Video Conferencing Service – C.S0042-0

• 3GPP2 Packet Switched Video Telephony Services (PSVT/MCS) – C.P0055-0

04 December 2006 3

Video Conferencing & Telephony Specification Development within 3GPP2

04 December 2006 4

TSG-C WG1 Structure

WG1 – Applications ServicesScott Droste

Motorola

SWG1.1 – Voice ServicesFrank Corcoran

QUALCOMM

SWG1.2 – Multimedia Services

Keith MillerNokia

SWG1.3 – Data ServicesRobert Marks

Lucent

SWG1.4 – Ancillary ServicesScott Droste

Motorola

1. Requirements, functions and interfaces for cdma2000 infrastructure and user terminal Equipment needed to support individual application services.

2. Exploring and developing new technologies that will lead to improved individual application services.

3. Evaluation and adoption of visual codecs (video, image, graphics),

4. Evaluation and adoption of complementary audio codecs including: synthetic (MIDI, SP-MIDI) and natural audio,

5. Evaluation, definition, and adoption of supporting visual and temporal synchronization methods,

6. Evaluation, definition, and adoption of supporting formats for over the air transmission through streaming, pseudo-streaming, downloading and associated methods for content protection.

7. Evaluation and adoption of complementary protocols, e.g. RTSP/SDP, RTP/RTCP, to support real-time, near real-time and interactive multimedia services.C12-20031208-013R1

3GPP2 video conferencing and telephony service specifications 3GPP2 video conferencing and telephony service specifications developed by TSG-C SWG1.2developed by TSG-C SWG1.2

04 December 2006 5

3GPP2 Video Conferencing and Telephony Specifications

C.S0042-0Circuit-Switched Video Conferencing Services

Published – August 2002Defines SO 57 & 58 for transfer of multiplexed audio, video & control data at 32 & 64 kbps over cdma2000 1x networks

C.P0055-0Packet Switched Video

Telephony Services (PSVT/MCS)

In V&V Comment Resolution. Projected

Publication in December 2006

Defines support of one-to-one conversational audio/video services between a mobile terminal and another mobile

terminal or a video terminal on the Internet

Document Title Status Description of Specification

04 December 2006 6

3GPP2 Development Timeline

2000 2001 2002 2003 2004 2005 2006 2007

August 2002C.S0042-0 CS Video Conferencing

May 2002cdma2000 Rev C

April 2002cdma2000 Rev B

June 2006EV-DO Rev B

October 2000EV-DO Rev 0

March 2004cdma2000 Rev D

April 2004EV-DO Rev A

July 2000cdma2000 Rev A

October 1999cdma2000 Rev 0

December 2006C.S0055-0 PS Video Telephony

3GPP2 Air Interface Development Timeline

3GPP2 Video Conferencing/Telephony Development Timeline

04 December 2006 7

3GPP2 Circuit-Switched Video Conferencing ServiceC.S0042-0

04 December 2006 8

CS Video Conferencing Overview

• C.S0042-0 defines video conferencing SO 57 & 58 at 32 and 64 kbps, respectively, over the air interface (carried in RLP)

• ITU-T H.324 (Terminal for Low Bitrate Multimedia Communication) with Annex C used for video conferencing

• ITU-T H.245 (Control Protocol for Multimedia Communication) version 7 (or greater) used for capability negotiation between terminals

Audio I/O

User Control

Interface

Visual I/O

Audio

Encoder/Decoder

Visual

Encoder/Decoder

System

Control Interface

Multiplexer

(Circuit-Sw

itched)

Wireless C

omm

unication Netw

ork

Scope of Video Conferencing

• ITU-T H.223 (Multiplexing Protocol for Low Bitrate Multimedia Communication)with Annex A & B used formultiplexing video, audio,and application layercontrol data

04 December 2006 9

CS Video Conferencing Service Configuration Attributes

Service Configuration Attribute Valid Selections

Forward FCH/DCCH Multiplex Option 0x1

Reverse FCH/DCCH Multiplex Option 0x1

Forward FCH/DCCH Transmission RatesFor the FCH, Rates 1, 1/2, 1/4, and 1/8 enabled. For the DCCH,

Rate 1 enabled, Rates 1/2, 1/4, and 1/8 not enabled.

Reverse FCH/DCCH Transmission RatesFor the FCH, Rates 1, 1/2, 1/4, and 1/8 enabled. For the DCCH,

Rate 1 enabled, Rates 1/2, 1/4, and 1/8 not enabled.

Forward Traffic Type Primary or Secondary

Reverse Traffic Type Primary or Secondary

Forward FCH/DCCH Radio Configuration RC 3, 4, 6, 7

Reverse FCH/DCCH Radio Configuration RC 3, 5

Forward Supplemental Channel Multiplex Option 0xf20

Reverse Supplemental Channel Multiplex Option 0xf20

Forward Supplemental Channel Frame Length 20 ms

Reverse Supplemental Channel Frame Length 20 ms

Forward Supplemental Radio Configuration RC 3, 4, 6, 7

Reverse Supplemental Radio Configuration RC 3, 5

where multiple options are supported the default is in bold

04 December 2006 10

CS Video Conferencing Protocol Stack

cdma2000

RLP

H.245, video, voice

H.223 frame

64/56 kbps PCM

Physical Physical

Um A2

Mobile StationBase Station MSC

RLP

cdma2000

64/56 kbps PCM

Rate Adaptation Protocol

Video Conferencing Call Setup and Bearer Protocol Stack

04 December 2006 11

CS Video Conferencing Codec Support

H.2

63

Vid

eo

C.S0042-0CS Conferencing

C.P0055-0PS Video

Telephony

MP

EG

-4 V

ide

o

H.2

64

AV

C V

ide

o

AM

R S

pe

ec

h

VM

R-W

B S

pe

ec

h

13

K S

pe

ec

h

EV

RC

Sp

ee

ch

SM

V S

pe

ec

h

Codec

Mandatory Optional Basic codec/profile mandatory with certain profiles optional

Optional. If supported, its use is preferred over

mandatory codec

04 December 2006 12

CS Video Conferencing Call Setup

MS Base Station MSC MSC Base Station MS

Origination Message(SO = 57) Complete L3 Info: CM

Service Request(SO = 57) IAM

(32 kbps,H.245/H.223)

Paging Request(SO = 57)

Page Message(SO = 57)

Assignment Request

Channel AssignmentMessage

ACM

Page ResponseMessage(SO = 57)

Compete L3 Info:Paging Response

(SO = 57)

Assigment Request

Channel AssignmentMessage

Service ConnectCompletion

Assignment Complete

ANMConnect

Connect Order

H.223 frames exchanged over 64 kbps UDI channel (32 kbps over the air)

H.245 Control

MPEG-4 Video

EVRC Speech

Connect

Service ConnectCompletion

Assignment Complete

Alert with Info

Connect Order

04 December 2006 13

CS Video ConferencingAdditional Capabilities

• Supports video conferencing with 3GPP-324M terminals– SO 58 (64 kbps service) invoked over cdma2000

channel– IWF acts as gateway for video conferencing

negotiation and control messages and EVRC to 3GPP-AMR speech transcoding

04 December 2006 14

3GPP2 Packet Switched Video Telephony Services (PSVT/MCS)

C.P0055-0

04 December 2006 15

Packet Switched Video Teleconferencing (PSVT) Overview

• C.P0055-0 defines support for one-to-one conversational video services on 3GPP2 networks between:– Two mobile terminals– A mobile terminal and a video terminal on the Internet

• Defines minimum requirements to ensure interoperability within 3GPP2 networks as well as optional capabilities and feature support to enable interoperability across other networks and technologies

• Uses IETF AVPF packet loss feedback for providing dynamic error resiliency for video. Feedback enables encoder to adaptively insert redundancy (intra-refresh) in the video stream as needed to stop propagation of packet loss errors

• Defines FlowProfileID parameter for SDP to enable more efficient negotiation of RAN QoS resources. Allows the two terminals to better coordinate E2E QoS.

• Defines optimized procedures for establishing RAN QoS when multiple codecs are supported in the terminals.

• Support defined for 3GPP2 IMS and 3GPP2 non-IMS networks

04 December 2006 16

PSVT Network Reference Model

IPNetworks

PDSNRAN

Network A

PDSN RAN

Network B

SIP Proxy SIP Proxy

MSMS

AAAAAA

SIP SignalingAir Interface/IOS SignalingMedia Control for Audio/VideoPSVT /VoIP Audio Bearer PathPSVT Video Bearer PathAAA Interface

Network Reference Model for Non-roaming Mobile-to-Mobile PSVT Call Network Reference Model for Non-roaming Mobile-to-Mobile PSVT Call

04 December 2006 17

PSVT IMS Network Reference Model

Network Reference Model for Non-roaming Mobile-to-Mobile PSVT Call over IMS Network Reference Model for Non-roaming Mobile-to-Mobile PSVT Call over IMS

IPNetworks

PDSNRAN

Network A

PDSN RAN

Network B

I/S-CSCF I/S-CSCF

MSMS

MRFP(optional)

MRFC(optional)

AAA

HSS

P-CSCF

AAA

HSS

P-CSCF

AS(optional)

SIP SignalingAir Interface/IOS SignalingMedia Control for Audio/VideoPSVT /VoIP Audio Bearer PathPSVT Video Bearer PathAAA/HSS InterfacesMP Interfaces [19]

AS(optional)

04 December 2006 18

PSVT RAN and PDSN Protocol Stacks

R-P

MS RAN PDSN

Physical Layer

R-P

IP IP

Physical Layer

Mux

HDLC Framing

PPP Encapsulation

IP IP

HDLC

L1

PPP

L1

L2

L1

Mux

RLPRLP R-P R-P

IP

L1 L1

L2

L1

Mux

Physical Layer

Mux

RLP RLP

Physical Layer

MS RAN PDSN

Segment Framing

IP

Segment Framing

Protocol Stack when HDLC framing is applied Protocol Stack when segment-based framing is applied

04 December 2006 19

PS Video Telephony Codec Support

H.2

63

Vid

eo

C.S0042-0CS Conferencing

C.P0055-0PS Video

Telephony

MP

EG

-4 V

ide

o

H.2

64

AV

C V

ide

o

AM

R S

pe

ec

h

VM

R-W

B S

pe

ec

h

13

K S

pe

ec

h

EV

RC

Sp

ee

ch

SM

V S

pe

ec

h

Codec

Mandatory Optional Basic codec/profile mandatory with certain profiles optional

Optional. If supported, its use is preferred over

mandatory codec

Other speech codecs, although Other speech codecs, although not specified by C.P0055-0, are not specified by C.P0055-0, are allowed and supported through allowed and supported through SIP SDP negotiation between SIP SDP negotiation between

endpointsendpoints

04 December 2006 20

PSVT Protocol Stacks over IP

IPNetworksApplication

SIPProcessing

MediaProcessing

Application

SIPProcessing

MediaProcessing

SIPServers

SIP

Session Control

IP IP

SIP

TCP

SIP

Session Control

IP

SessionControlProtocolStacks

NetworkConnection

Model

MediaApplicationand RTCPProtocolStacks

PSVT or VoIPTerminal

PSVT or VoIPTerminal

UDP

IP

RTP/RTCP

UDP

IP

RTP/RTCP

Media ProcessingMedia Processing

TCP UDP

Media Processing

Media ResourceFunction Processor

RTP/RTCP

UDP

IP

Session Control

TCP UDP

SIP

UDP TCP UDP

IP

RTP/RTCP

UDP

IP

SIP Server

04 December 2006 21

PSVT Feature Initialization

TerminalRAN/PDSN IMS Core Network

CONFIGURE AND ACTIVATE QoS for SIP flow

IMS/SIP REGISTRATION

CONFIGURE QoS for voice flow

MAY BE SIMULTANEOUS

ROHC NEGOTIATION

CONFIGURE QoS for video flow

CONFIGURE QoS for voice and video RTCP traffic flows

•Feature Initialization occurs prior to PSVT call origination or termination.

•Initialization tasks:

•Configure & activate QoS for transporting SIP traffic

•Configure QoS for transporting voice & video traffic

•Configure QoS for transporting RTCP packets for voice & video streams.

•Negotiate ROHC parameters for compressing the voice and video traffic

•SIP Proxy or IMS core network P-CSCF registration

04 December 2006 22

PSVT Call Setup

3GPP2 PSVT Terminal 1

3GPP2 PSVT Terminal 2

IMS CN

2. INVITE (SDP offer)3. INVITE (SDP offer)

1. Activate QoS for voice and video flows

5. 180 Ringing (SDP answer)6. 180 Ringing (SDP answer)

4. Activate QoS for voice and video flows

7. Generate Ringback

8. PRACK9. PRACK

11. 200 OK (PRACK)12. 200 OK (PRACK)

14. 200 OK (INVITE)15. 200 OK (INVITE)

10. Generate Ringing

13. Answer

16. ACK17. ACK

18. RTP speech and video over voice and video flows

100 Trying100 Trying

Ready to receive media

Ready to receive media

May begin sending media

May begin sending media

04 December 2006 23

PSVT Call Release

3. BYE4. BYE

7. 200 OK8. 200 OK

Terminal 1 Terminal 2IMS CN

2. Hangs-up

5. QoS for voice and video flows de-activated 6. QoS for voice and video flows

de-activated (if still active)

1. RTP speech and video over voice and video flows

04 December 2006 24

PSVT In-Call Media Management

C.P0055-0 defines SIP-based mechanisms for:– Adding Bi-Directional Video to a VoIP Call– Removing Bi-Directional Video from a PSVT Call

• User-Initiated Removal of Video from a PSVT Call

• Network-Initiated Removal of Video from a PSVT Call

04 December 2006 25

PSVT Supplementary Services & Functions

C.P0055-0 defines support for the following optional services & functions:– PSVT Voice Retry

• Retry PSVT Call Origination as VoIP

• Retry PSVT Call Reception as VoIP

• Retry PSVT Call Origination as 1x Circuit-Switched Voice

• Retry PSVT Call Reception as 1x Circuit-Switched Voice

– Video/Media on Hold

04 December 2006 26

C.P0055-0 PSVT Development Status

Jan 1, 2005 Jan 1, 2006 Jan 1, 2007

Dec 06 - Jan 07TSG-C PublicationApproval Window

Oct 04 - Sep 06C.P0055-0 Stage 2 - Stage 3 Development

Oct 19, 20043GPP2-00090 WI Submission

Sep - OctR&F

Sep 15, 2006C.P0055-0 R&F Approved

Oct - DecV&V

Oct 30, 2006C.P0055-0 V&V Approved

Dec 4, 2006V&V Comments Due

• C.P0055-0 V&V Comment Resolution occurring this meeting cycle

• Anticipate TSG-C approval for publication at end of this meeting or in January 2007

Thank You

For more information, please contact:

WG1 – Applications & Services

Scott Droste (scott.droste@motorola.com)

SWG1.2 – Multimedia Services

Keith Miller (keith.miller@nokia.com)