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研究了移动Ad Hoc网络中的媒体接入控制问题.首先,基于IEEE 802.11媒体接入控制协议,提出了应用于MANET网络媒体接入控制的2个机制:自适应回退窗转发优先机制(FPF)和多跳链邀请发送机制(MFCTI).FPF机制根据业务优先级自适应调整竞争窗大小,而MFCTI机制则充分利用了网络层路由信息和无线传播的广播特性.在此基础上对所提出的机制进行了仿真研究并与原IEEE 802.11媒体接入控制进行了比较.结果表明,所提机制可以有效地提高网络吞吐率,降低端对端迟延,缓解网络局部拥塞,从而提高了MANET网络的性能.其另一优点是只需对IEEE802.11媒体接入控制作少量的补充和改动.
We study the problem of media access control in mobile ad hoc networks.Firstly, based on the IEEE 802.11 media access control protocol, two mechanisms for media access control in MANET are proposed: adaptive backoff window forwarding priority mechanism (FPF ) And multi-hop invitation (MFCTI) mechanism.The FPF mechanism adaptively adjusts the size of the contention window according to the service priority, while the MFCTI mechanism makes full use of the network layer routing information and the radio characteristics of the broadcast.On the basis of this, And compared with the original IEEE 802.11 media access control.The results show that the proposed mechanism can effectively improve the throughput of the network and reduce the end-to-end delay, alleviate the local congestion in the network, and improve the performance of the MANET network Another advantage of this is that it requires only minor additions and modifications to IEEE802.11 media access control.