ITUT SG 16 Work on End to End

ITU-T SG 16 Work on End to End Quality of Service in IP Multimedia Systems Mike Buckley Telchemy Inc IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva

Inter-relationship of Qo. S Factors Network Packet Loss Network Jitter Network Delay Network Factors IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva Overall Packet Loss Codec Performance Perceived Quality Jitter Buffers Overall Delay Application Factors Qo. S Service Level

Qo. S Parameters ITU-T SG 12/16 User Perceived Qo. S SERVICE ITU-T SG 16/11 Codec Performance, VAD, Frames per Packet, Jitter Buffer Size, Codec Delay, FEC (Redundancy) APPLICATION ITU-T SG 13/IETF Max Packet Loss, Max Mean Delay, Max Delay Variation IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva TRANSPORT

ITU-T SG 16 - New Qo. S Related Recommendations • • H. qos. arch - Qo. S Architecture • H. 323 Annex N - Qo. S signalling and control in H. 323 systems • H. trans. control - Qo. S signalling to Transport Domains • • H. priority - Procedures for controlling service priority H. mmclass - Multimedia Qo. S Service classification H. mmcp - Call processing performance in Multimedia Systems IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva

Positioning of Q. F/16 Recommendations in relation to Qo. S Architecture H. qos. arch) SERVICE LEVEL H. mmclass, H. mmcp, H. priority H. qos. m APPLICATION LEVEL H. 323 Annex N, H. mmcp, H. priority, H. policy, H. resilience H. qos. m MANAGEMENT LEVEL H. trans. control Network Packet Loss, Mean Delay, Delay Variation TRANSPORT LEVEL H. trans. cont, NSIS, RSVP, DIFFSERV, MPLS etc IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva H. qos. m TRANSPORT

H. mmclass - Approach to Characterizing Service Level Qo. S · Qo. S is defined subjectively as perceived by the user, · It is end to end (e. g. mouth to ear for speech), · A number of Qo. S Service Classes are defined, · Classes include guaranteed quality (statistically) and unguaranteed (best effort). IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva

The TIPHON Speech Qo. S Classes Class Narrowband Wideband High Listener Speech Equivalent or Quality Better than better than G. 711 G. 726 at 32 (One-way Nonkbit/s conversational) End-to-end Delay (G. 114) < 100 ms Overall Transmission Quality Rating (R) N. A. < 100 ms > 80 Medium Equivalent or better than GSM-FR Acceptable Unguaranteed (Best Effort) Undefined < 150 ms < 400 ms* > 70 > 50* * Target IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva

Multimedia Qo. S Classification (H. mmclass) SERVICE Voice Classes Video Classes Data Classes APPLICATION Voice Factors Video Factors Data Factors TRANSPORT Network Packet Loss, Mean Delay, Delay Variation Bearer Classes IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva Bearer Classes Service (e. g. videoconferencin, broadcast video etc) Service Components (Classes e. g. G. 1010 and TIPHON) Application Factors (e. g. codec type, jitter buffer etc) Parametric (e. g. TIPHON) or Class based (e. g. Y. 1541)

The Concept of Qo. S Budgets IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva

The H. qos. arch - general model Application Level Qo. S Signalling H. 323 Annex N Service Domain 1 Application Plane Vertical Qo. S Signalling (H. trans. cont) Transport Plane Transport Domain 1 Transport Domain 3 Transport Domain 2 Packet Flow Qo. S Signalling Call Signalling IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva Transport Level Qo. S Signalling (H. trans. cont or NSIS) H. 323 Annex N

Qo. S in H. 323 Protocols (Annex N) · Qo. S is determined on a per media stream basis so Qo. S is negotiated per media stream via H. 245. New fields in H. 245 under development. · Qo. S Class may be requested by End User via H. 245 or H. 225. 0. Additions to both protocols under development to enable this. · Qo. S characteristics of terminals may be registered with service providers. This involves additions to H. 225. 0 RAS. New Annex N of H. 323 IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva

New Vertical Protocol (H. trans. cont) · Used to signal Qo. S parameters (max delay, max jitter, max packet loss) to each domain · Typically will be between GK or Media Gateway Controller and Edge Router or Transport Resource Manager · Will use H. 248/Megaco (with new extensions) IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva

Service Priority (H. priority) · Defines Service Types (Way in which Qo. S Services are offered) · Defines classes of Session Priority · For H. 323 signalled in H. 460. 3 H. priority provides framework for Emergency Services IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva

Summary • H. mmclass provides Service level Qo. S classification for each service component. (Consistent with G. 1010) • H. qos. arch defines domain by domain Qo. S approach allowing Qo. S signalling at Application and Transport levels • H. 323 Annex N - Qo. S signalling and control in H. 323 systems • New protocol H. trans. cont required for Application to Transport Level signalling • H. priority defines session priority and service types IP Cablecom & MEDIACOM 2004 Workshop 12 - 15 March 2002 Geneva