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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 41713 (05)
- University: Sharif University of Technology
- Department: Electrical Engineering
- Advisor(s): Pakravan, Mohammad Reza; Shirmohammadi, Shervin
- Abstract:
- For applications such as videoconferencing, in which network resources are used for transmittingshared data, one may utilize multicasting so that resources are allocated in an efficient way. Due to the difficulties in implementing multicasting in the IP layer, designers tend to use the application layer of the OSI model to map an overlay network and implement the multicasting protocol in that layer, also known as Application Layer Multicasting (ALM). Besides the transfer of data, various concerns about the method such as application domain, group management, and routing mechanism are all handled by the ALM protocol. In this thesis, an ALMprotocol for multi-participant video conferencing in small groups is introduced.The protocol works in a distributed manner to esure robustness in case of node crashes or peers existing. It is predominant in fair sharing of network resources and robust handling of multicast groups,speficiallyin networks with poor QoS. Advantages and disadvantages of the protocol are discussed and its distinguishing properties are described. In addition to the above work, a simulator is desinged and developed for evaluating overlay networks and ALM protocols. Finally, the proposed ALM protocol is implemented and simulated onthe above-mentionedsimulator, and the resulting observations are studied and compared.
- Keywords:
- Computer Networks ; Video Conferencing ; Service Quality ; Application Layer Multicast Protocol ; Multicast
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