Publication detail

Simulation of Large IP-based Multimedia Distributions

KOMOSNÝ, D. CVRK, L.

Original Title

Simulation of Large IP-based Multimedia Distributions

Type

conference paper

Language

English

Original Abstract

The paper deals with proposing a simulation model to extend the known theoretical results for the reflection and the summarisation feedback methods. The simulation aim is to obtain results closely related to the behaviour of real SSM sessions with millions of receivers. The proposed simulation model consists of various levels of abstraction. The high level represents the general view of communication; the lowest level represents in detail the structures used (e.g. concrete signals exchanged between processes). Four main blocks are included in the model: Network, Source, Receivers, and Control. The purpose of each block is closely related to a real SSM architecture. The model has been proposed using the Specification and Description Language (SDL). It is an object-oriented programming language that uses graphical expressions for the source code. We also discuss problems faced during the model development, such as the long time of simulation processing, which is due to searching through tables that grow with the amount of active receivers. The session size is calculated using a table containing the entries of each SSRC (synchronization source identifier) seen in received packets. The SSRC entry is added to the table, when an endpoint joins the session, and deleted when an endpoint leaves the session. Every time a packet is received, the table is searched through to identify any possible new session member. Finally, a comparison of theoretical and simulated results is discussed for various known implementations of SSM with RTP/RTCP for the reflection and the summarisation methods. The final system should allow a cheap analysis of extremely large multimedia sessions with one source and many receivers (for instance IP-based TV distribution), which are expected to be in use in the near future.

Keywords

Multicast, Single source, Multimedia, Protocol, Feedback, Simulation

Authors

KOMOSNÝ, D.; CVRK, L.

RIV year

2005

Released

7. 9. 2005

Publisher

IADAT

Location

Portsmouth

ISBN

84-933971-7-2

Book

Proceedings IADAT - International Conference on Telecommunications and Computer Networks

Pages from

110

Pages to

114

Pages count

5

BibTex

@inproceedings{BUT15589,
  author="Dan {Komosný} and Lubomír {Cvrk}",
  title="Simulation of Large IP-based Multimedia Distributions",
  booktitle="Proceedings IADAT - International Conference on Telecommunications and Computer Networks",
  year="2005",
  pages="110--114",
  publisher="IADAT",
  address="Portsmouth",
  isbn="84-933971-7-2"
}