QoS for Interactive Multimedia Over IP Project Presentation By-

QoS for Interactive Multimedia Over IP Agenda Introduction

Introduction (Contd…) In Multimedia over IP, all Information Streams are classified into

Why QoS?Motivations

QoS Architecture

The QoS architecture distinguishes 3 levels –Client Level (C-QoS)

QoS Architecture (Contd…)

C –QoS specifies the QoS from the end-user perspective.

QoS Issues

As discussed in the previous section, QoS can be achieved in 3

Model Of Videoconferencing

display

Time

End-to-end delay < 100 ms

End-to-end Delay and Jitter

As discussed earlier, maximum tolerable end-to-end delay

VBR MPEG

Internet Videoconferencing System Resource Reservation and Traffic Shaping

Resource reservation is used in the network in order to bound the

Videoconferencing on the Internet Contd…

H.261 brief overview H.261 Hierarchy of groupings

Contd…Error Control scheme Error control scheme (Contd…)Error control scheme Error control scheme (Contd…)Error control scheme (Contd…)

Congestion control scheme Congestion control

Network sensor:

Congestion control (Contd…)Congestion control (Contd…) Summary Need a Standard !

What’s H.323?Elements of an H.323 System

H.323 Network Elements The Zone

H.323 Terminal Protocol stack H.323 Terminal Protocol stack (Contd…)

Other Elements

Direct Call(Call Establishment)

T1(caller)

Gatekeeper

T2(receiver)

Gatekeeper T2(receiver)Direct Call (H.245 Control Signal flows)

Direct Call (Media Flow and Call Release)

Gatekeeper T2(receiver)

Quality of Service(QoS) Issues

Qos Support for current H.323

RSVP for a point-to-point connection Transmitter Receiver Receiver

Transmitter

RSVP for point-to-multipoint Transmitter Receiver Receiver

Transmitter

Future QoS Deployment QoS Deployment Acronyms Review Questions

References