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| A Polling Access Control Protocol in Mobile Ad hoc Networks |
| He Min①②; Liu Xing-song①; Zhao Dong-feng②; Liu Ke-jian①; Chen Jian-ying① |
| ①School of Computer Science & Engineering, 8010 division, UEST,Chengdu 610054,Cina;②School of Information; Yunnan University, Kunming 650091,China |
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Abstract After studying the MAC protocol of Ad hoc network and by modifying the Wireless Token Ring Protocol (WTRP), a new uncontested Distributed Parallel Wireless Polling Access Protocol (DPWPAP) that can provide MAC QoS guarantees for Ad hoc network is presented, and the mathematical model is established by the embedded Markov chain theory and the probability generating function method. Based on it, the mean value of queue length and message waiting time are explicitly obtained. The simulation results indicate minor errors are introduced by the established system, and also show that the average delay and average queue length in DPWPAP system are much more lower than in WTRP system, the stability is enhanced highly. As a result, it is a better MAC protocol for the services that require lower delay.
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Received: 21 January 2004
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2005, Vol. 27 
