SIP-Based Intelligent Multimedia Conferencing
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Transcript of SIP-Based Intelligent Multimedia Conferencing
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Agenda
• Introduction and Motivation
• SIP standard and advantages
• H.32x standard
• Basic Real Time Transport Protocol
• Formulation Plan and Methodology
• Implementation
• Future Work
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Introduction
Conferencing has been on the research agenda for
many years and is rapidly gaining interest in the field of
communication.
It is advantageous to people who don’t want to spend
their time and money flying all over the world for face-
to-face meetings.
International standardization bodies have definedprotocols for multimedia conferencing. The
International Telecommunication Union (ITU) has made
H.32x standard.
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Motivation
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Session Initiation Protocol (SIP)
SIP: A proposed solution by Internet Engineering Task
Force (IETF)
SIP is an application-layer signaling protocol for
creating, modifying and terminating sessions with one
or more participants.
Can be used for voice, video, instant messaging,
gaming, etc.
Lightweight, flexible and extensible and moreover
scalable.
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H.32x Standard
Handling conferencing data packets
Different platform desktops
ITU developed H.32x series, to facilitate the compatibility:
• H.322 (guaranteed bandwidth)
• H.323 (non-guaranteed bandwidth)
• H.324 (Applications over PSTN and mobile phones)
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H.32x vs. SIP
On comparing H.32x and SIP protocols, it is found that
H.32x is widely deployed and more mature only
because of its early adoption by the market
But H.32x has several problems, including scalabilityissues.
On the contrary, SIP is more lightweight, flexible and
extensible. It is a text-based protocol which can easilyinteract with other internet protocols.
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Real Time Transport Protocol
RTP is a transport protocol for real-time applications. Itis used for the transport of real-time data, including
audio and video.
RTP provides support for applications with real-timeproperties such as continuous media (e.g., audio and
video), including loss detection, security and content
identification.
RTP does not guarantee quality-of-service for real time
services.
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Architecture
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Formulation Plan
Package multimedia data into RTP packets.
Focus: It is a SIP user agent responsible for the
management of the conference using SIP signaling
protocol.
The focus can also act as a notifier, accepting
subscriptions to the conference, and notifying
subscribers about changes to the conference state.
A mixer is responsible for handling the multimedia
streams, and generating output streams which can be
distributed to participants. 11
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Procedure
After capturing the packets at the server, the same will besent to the client site.
As soon as streams arrive at client site, a player will be
created so as to play the RTP streams for video data.
A transmitting module will be developed at the server site
to transmit the data. A receiving module will be developed
at the client site which will receive the data streams.
Finally, the modules will be tested and integrated to
implement conferencing.
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Tasks to be performed
An interface would be developed for capturing the video
packets from a webcam and displaying the same on theterminal for a single user.
The above implementation would be modified to capture
video packets and transfer the same across multiple usersthus developing a conferencing system.
After the core implementation of conferencing system is
complete, an attempt would be made to add miningstructures that will give detailed information about the
user, what kind of conferencing he/she does and with
which user he/she interacts most of the time.
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Screenshots of implemented chat system
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Future Work
On successful completion of the proposed intelligentsystem, efforts will be made to design the conferencing
system for distributed architecture that will support
large number of heterogeneous networks and devices.
An effort will also be made to implement the same
mining structures in distributed system too.
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