Cooperative communication MAC (CMAC) - a new MAC protocol for next generation wireless LANs
Cooperative communication MAC (CMAC) - a new MAC protocol for next generation wireless LANs
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DOI：
10.1109/wirles.2005.1549375
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发表时间：
2005-06
期刊：
影响因子：
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通讯作者：
S. N;Chun-Ting Chou;M. Ghosh
中科院分区：
文献类型：
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作者：
S. N;Chun-Ting Chou;M. Ghosh
可靠性对任何无线传输都是一大挑战，因为无线网络往往会由于信道错误而丢弃很大比例的帧。为了提高噪声无线信道上的可靠性，可以对无线网络采用前向纠错(FEC)方案。如果静态和自适应的FEC算法的开销不能很好地匹配底层的信道误差，特别是当路径损耗波动较大时，则会改善或降低无线网络的性能。本文从纯媒体访问控制(MAC)的角度提出了一种缓解该问题的新方法。新的MAC协议称为协作MAC(CMAC)，通过引入用户协作提供的空间分集来增强现有的IEEE 802.11e无线局域网(WLAN)MAC协议。证明了该协议极大地增强了无线局域网业务的健壮性。此外，我们还比较了CMAC协议与直接传输和多跳传输的性能。
Reliability is a big challenge to any wireless transmission as wireless networks tend to drop a large proportion of frames due to channel errors. To improve reliability over the noisy wireless channels, forward error correction (FEC) schemes can be employed for wireless networks. Static and adaptable FEC algorithms can improve or degrade the performance of the wireless networks if their overheads are not matched properly to the underlying channel error, especially when the path loss fluctuates widely. This paper provides a new approach of alleviating the problem from a pure medium access control (MAC) centric perspective. The new MAC protocol, called cooperative MAC (CMAC) enhances the existing IEEE 802.11e wireless local area network (WLAN) MAC protocol by introducing spatial diversity which is provided via user cooperation. We prove that this protocol greatly enhances the robustness of the WLAN operation. Additionally we compare the performance of CMAC protocol with the direct and multi-hop transmissions.