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首页> 外文期刊>International journal of mobile network design and innovation >Distributed opportunistic communication protocol for wireless multihop networks
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Distributed opportunistic communication protocol for wireless multihop networks

机译：无线多跳网络的分布式机会通信协议

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Despite significant research effort, the performance of distributed medium access control methods has failed to meet theoretical expectations. Previously, we have proposed the concept for a fully-distributed, but non-optimum opportunistic medium access control called Channel MAC. In this paper, we present the Channel MAC protocol operations addressing the issues of information exchange between nodes, predicting transmission intervals and selecting transmission thresholds to achieve fairness. Although the proposed prediction scheme based on mean channel fading is simple to implement, it is imperfect leading to some performance losses. Event based simulation tool NS2 is used to analyse the performance of Channel MAC in a number of network scenarios. We analyse the performance of the proposed protocol using the performance metric; throughput, fairness and delay. The simulation results show throughput performance improvement of up to 30% with Channel MAC over IEEE 802.11 in certain multihop scenarios. Generally, the proposed protocol outperforms 802.11 in all analysed network scenarios. We also show that the severe resource starvation problem (unfairness) of IEEE 802.11 in some network scenarios is reduced by the Channel MAC mechanism.
机译：尽管进行了大量研究工作，但分布式媒体访问控制方法的性能仍未达到理论预期。以前，我们已经提出了一种称为Channel MAC的全分布式但非最佳机会媒体访问控制的概念。在本文中，我们提出了信道MAC协议操作，以解决节点之间的信息交换问题，预测传输间隔并选择传输阈值以实现公平性。尽管所提出的基于平均信道衰落的预测方案很容易实现，但它并不完善，导致一些性能损失。基于事件的仿真工具NS2用于在许多网络场景中分析Channel MAC的性能。我们使用性能指标来分析所提出协议的性能；吞吐量，公平性和延迟。仿真结果表明，在某些多跳方案中，通过MAC通道与IEEE 802.11相比，吞吐量性能最多可提高30％。通常，在所有分析的网络方案中，建议的协议都优于802.11。我们还表明，在某些网络情况下，IEEE 802.11严重的资源匮乏问题（不公平）通过信道MAC机制得以缓解。

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