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中文摘要：
在Ad hoc网络中，低可靠性的无线链路使多播应用网络扩展性较差，然而有线网络多播应用中FEC（Forward Error Correction）技术和NACK（Negative ACKnowledgement）重传机制不适于Ad hoc网络。该文旨在提高Ad hoc网络中多播可靠性，提出由PDA（Packet Dispersal Algorithm）算法和ARM（Active Retransmission Model）重传模型相结合的可靠多播传输方案（RMTS）。理论分析和仿真结果部表明该方案具有效率高、复杂度低、资源占用少和开销小等优点。
英文摘要：
In Ad hoc networks, low reliability of wireless link makes the scalability ofmulticast 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 hoe 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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