BDCF——支持双向传输的无线局域网协议

摘要

In order to fully utilize the limited frequency and bandwidth resources in 802.11 wireless local area networks (WLAN), a novel media access control (MAC) protocol which supports bi-directional transmission is proposed. The protocol makes two packets respectively from the senderand the receiver transmit together through one frame exchange sequence to reduce the network overhead and save the bandwidth resources. The analytical model and the simulation results show that,compared with other MAC protocols, the proposed protocol can significantly improve the average throughput of bi-directional flows, while maintaining the backward compatibility with the legacy 802.11 distributed coordination function (DCF) protocol.%为了充分利用无线局域网有限的频率和带宽资源,提出了一种新的支持双向传输的媒体接入控制(MAC)协议.该协议将两个方向互逆的数据分组合并在一个帧交换序列中进行传输,从而减少链路层与物理层的开销,节省宝贵的带宽资源.建模及仿真结果表明,与其他MAC协议相比,该协议明显提高双向流的平均吞吐量,同时保持与标准802.11分布式协调功能(DCF)的兼容性.