一种跨层协助的Ad hoc无线网络广播策略

在Ad hoc无线网络中，对全网范围进行广播有着广泛的应用。而Ad hoc网络节点资源、网络资源严重受限，广播引起的广播风暴问题加剧了资源的消耗。本文提出一种跨层协助的广播策略，该策略利用一跳邻节点的信息和物理层、数据链路层的信息统一在MAC设置退避时间，并根据发送节点密度自适应调整退避的时间，减少转播冗余、冲突发生的概率和延迟，确保了广播的可达性。仿真结果也表明提高了广播的效率。

A Cross Layer Assisted Broadcasting Strategy for Ad hoc Wireless Networks

Broadcasting is a common operation in Ad hoc wireless networks with severe resource constraints. The problem of broadcasting storm aggravated the resource consumption in Ad hoc networks. We propose a cross layer assisted broadcasting strategy for Ad hoc networks which is made use of 1-hop neighbor knowledge to decide to rebroadcast, and information of physical layer and MAC layer to differentiate time of rebroadcast at MAC layer. The different time of rebroadcast is adjusted adaptively by the density of transmitter node. Analyses and simulations have shown that the strategy has fewer redundant rebroadcast, higher reachability and lower delay.