Performance Evaluation of Distributed Floor Control for Push-to-Talk Service over MANET
Date Issued
2009
Date
2009
Author(s)
Tang, Ya-Chun
Abstract
Push-to-talk (PTT) is a service that provides one-to-one or one-to-many group communications. PTT is similar to the traditional walkie-talkie system which is a half duplex communication — while one person speaks, the other(s) just listen. The main characteristic of PTT is that the session can be established easily by pushing a button without complicated configurations. At present, PTT service is provided on cellular network. However, the interoperability is bad due to the lack of common protocol. The PoC (Push-to-talk over Cellular) project of OMA (Open Mobile Alliance) defines the protocol of PTT in cellular network. The PoC adopts centralized system architecture so that extra cost of maintaining PoC servers is required and scalability and reliability are limited by PoC servers. Different from PoC centralized approach, a distributed peer-to-peer (P2P) mode has been proposed. In P2P PTT, floor control is a critical function to service quality. When more than one user wants to speak and pushes the button, the floor owner should be quickly and properly decided by floor control. The ease of deployment makes Mobile Ad hoc NETwork (MANET) become very popular for many kinds of applications. In this thesis, we propose some performance evaluation indexes for distributed floor control over MANET, and investigate the performance of distributed floor control over MAN through a well-known network simulation tool. The simulation results indicate some guidelines for future design of distributed floor control over MANET.
Subjects
push-to-talk
voice over IP
MANET
distributed system
floor control
Type
thesis
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