一種提高Ad hoc網(wǎng)絡(luò)中多播可靠性的算法和模型
An Algorithm and Model to Improve Reliability of Multicast in Ad hoc Networks
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摘要: 在Ad hoc網(wǎng)絡(luò)中，低可靠性的無線鏈路使多播應(yīng)用網(wǎng)絡(luò)擴(kuò)展性較差，然而有線網(wǎng)絡(luò)多播應(yīng)用中FEC(Forward Error Correction)技術(shù)和NACK(Negative ACKnowledgement)重傳機(jī)制不適于Ad hoc網(wǎng)絡(luò)。該文旨在提高Ad hoc網(wǎng)絡(luò)中多播可靠性，提出由PDA(Packet Dispersal Algorithm)算法和ARM(Active Retransmission Model)重傳模型相結(jié)合的可靠多播傳輸方案(RMTS)。理論分析和仿真結(jié)果都表明該方案具有效率高、復(fù)雜度低、資源占用少和開銷小等優(yōu)點(diǎn)。
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關(guān)鍵詞:
- Ad hoc;多播;可靠性;NACK;可靠多播傳播方案
Abstract: In Ad hoc networks, low reliability of wireless link makes the scalability of multicast group degrade drastically, and FEC(Forward Error Correction) technique and NACK(Negative ACKnowledgement)-based mechanism, which guarantees reliable transport of multicast in wired networks, is not adapt to be deployed in Ad hoc networks. In this paper, focusing on improving the scalability of multicast in Ad hoc networks, a Reliable Multicast Transport Scheme (RMTS) consist of PDA(Packet Dispersal Algorithm) and ARM(Active Retransmission Model) is proposed to guarantee reliable transports of multicast. Both theory analyses and simulation result show the merits of validity, simpleness, low resources-occupied and moderate overhead. -
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