一种应用于WLAN的混合双工MAC协议

吴皓威; 邹玉涛; 孙晨; 欧静兰

doi:10.11999/JEIT160539

一种应用于WLAN的混合双工MAC协议

doi: 10.11999/JEIT160539

基金项目:

国家高技术研究发展计划(2015AA7072014C)，重庆市院士基金项目(cstc2014yykfys90001)

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出版历程
- 收稿日期: 2016-05-26
- 修回日期: 2016-09-23
- 刊出日期: 2017-04-19

A Hybrid-duplex MAC Protocol for WLAN

Funds:

The National High-tech RD Program (2015AA7072014C), The Chongqing Academician Fund Project (cstc2014yykfys90001)

摘要

摘要: 全双工通信技术可以提高链路容量和频谱利用率，会给现有无线局域网(WLAN)带来极大的变革。该文针对传统半双工WLAN向全双工WLAN发展的过程中多种双工站点共存的问题，提出一种混合双工媒体接入控制(MAC)协议(HYD-MAC)。该协议合理设计了请求发送/清除发送(RTS/CTS)帧，并根据网络隐藏节点状况和站点全双工能力，自适应地选择最佳的传输模式，包括同步全双工、异步全双工、条件半双工以及半双工等4种模式。给出了HYD-MAC协议在4种传输模式下的链路建立与数据传输流程，分析了HYD-MAC的饱和吞吐量和介质访问时延等网络性能。仿真结果表明，所提的HYD-MAC的性能优于传统半双工DCF协议，特别在帧长较长、站点数较少、数据传输速率较低时，HYD-MAC的性能提升效果更加明显；与经典的全双工协议相比，HYD-MAC协议通过牺牲极少的吞吐量和时延性能，可以同时满足全双工、半双工以及混合双工网络的通信需求。
- 无线局域网 /
- 媒体接入控制 /
- 全双工 /
- 半双工 /
- 混合双工
Abstract: Full duplex communication technology can improve the link capacity and spectrum utilization, which brings great changes to the existing Wireless Local Area Network (WLAN). To Solve the compatibility issues in the process of half-duplex WLAN evolution to full-duplex WLAN, a HYbrid-Duplex MAC protocol (HYD-MAC) is proposed. According to the application scenarios and the full-duplex capability of the stations, the Request To Send/Clear To Send (RTS/CTS) frames are expanded and HYD-MAC can adaptively choose one from the four duplex modes, which are the synchronous full duplex, the asynchronous full duplex, the conditional half-duplex and half-duplex. The link establishment process of HYD-MAC protocol in four transmission modes are presented, and the network performance such as the network saturation throughput and medium access delay of the proposed protocol are analyzed. The results show that the HYD-MAC protocol can satisfy the communication requirements of the full-duplex network, half-duplex network and hybrid-duplex network at the same time by sacrificing little throughput and delay performance.
- WLAN /
- MAC /
- Full-duplex /
- Half-duplex /
- Hybrid-duplex

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参考文献(18)

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