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首页> 外文期刊>IEEE transactions on wireless communications >MAC-SCC: a medium access control protocol with separate control channel for reconfigurable multi-hop wireless networks
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MAC-SCC: a medium access control protocol with separate control channel for reconfigurable multi-hop wireless networks

机译：MAC-SCC：具有独立控制通道的媒体访问控制协议，用于可重配置的多跳无线网络

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摘要

In this paper, we propose a novel medium access control protocol with a separate control channel (MAC-SCC) to increase the channel efficiency and address the unfairness and instability problems of IEEE 802.11 MAC protocol. In MAC-SCC, the available bandwidth is partitioned into two channels: a data channel and a control channel, each associated with a network allocation vector (NAV). To reduce hardware complexity, the station transmits or receives on one channel only at any given time. In the network employing MAC-SCC, the next data frame can be pre-scheduled during the current data transmission via the separate control channel, and thus reducing the frame collision probability and the bandwidth wasted during backoff. Moreover the use of the separate control channel helps to achieve fair medium access and solve the instability problem resulted from frequent link failures. The optimal bandwidth partitioning between the two channels is analyzed via a statistical model, which shows 10% bandwidth for the control channel and 90% bandwidth for the data channel. The performance of MAC-SCC is quantified via extensive simulations in both a stand-alone simulator developed by using PARSEC and a comprehensive network simulator called QualNet with whole protocol stack. Our results show that MAC-SCC can effectively reduce the link failure probability, achieve fair medium access when running multiple TCP sessions, and yield a throughput gain up to 60% under high traffic load
机译：在本文中，我们提出了一种具有单独控制信道（MAC-SCC）的新型媒体访问控制协议，以提高信道效率并解决IEEE 802.11 MAC协议的不公平和不稳定问题。在MAC-SCC中，可用带宽分为两个通道：一个数据通道和一个控制通道，每个通道与一个网络分配向量（NAV）相关联。为了降低硬件复杂性，该站仅在任何给定时间在一个信道上发送或接收。在采用MAC-SCC的网络中，可以在当前数据传输期间通过单独的控制信道对下一个数据帧进行预调度，从而减少帧冲突的可能性并减少退避期间的带宽。此外，使用单独的控制信道有助于实现公平的媒体访问，并解决由于频繁的链路故障而导致的不稳定问题。通过统计模型分析两个通道之间的最佳带宽分配，该模型显示控制通道的带宽为10％，数据通道的带宽为90％。 MAC-SCC的性能通过使用PARSEC开发的独立仿真器和称为QualNet且具有整个协议栈的综合网络仿真器中的大量仿真进行量化。我们的结果表明，MAC-SCC可以有效降低链路故障概率，在运行多个TCP会话时实现公平的媒体访问，并在高流量负载下产生高达60％的吞吐量增益

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