A Receiver-Initiated Directional MAC Protocol for Handling Deafness in Ad Hoc Networks
A Receiver-Initiated Directional MAC Protocol for Handling Deafness in Ad Hoc Networks
复制标题
DOI：
10.1109/icc.2006.255721
复制
发表时间：
2006-12
期刊：
影响因子：
--
通讯作者：
M. Takata;M. Bandai;Takashi Watanabe
中科院分区：
文献类型：
--
作者：
M. Takata;M. Bandai;Takashi Watanabe
最近，已经针对无线自组织网络提出了几种使用定向天线的MAC协议，通常称为定向MAC协议。尽管定向传输有望提供显着的改进，但定向 MAC 协议却引入了新的问题。其中一个问题就是耳聋。当发射器反复尝试与其预期接收器通信但由于接收器的波束指向远离发射器的方向而失败时，就会导致耳聋。本文提出RI-DMAC（Receiver-Initiated Directional MAC）来解决定向MAC协议中的耳聋问题。 RI-DMAC 是发送方发起的操作和接收方发起的操作的组合。发送器启动模式是默认模式，接收器启动模式在发送器耳聋时触发。在RI-DMAC中，每个节点维护一个轮询表，并在每个对话完成后使用RTR（准备接收）帧轮询潜在的耳聋节点。实验结果表明，与现有的定向MAC协议相比，RI-DMAC提高了吞吐量和公平性性能。
Recently, several MAC protocols using directional antennas, typically referred to as directional MAC protocols, have been proposed for wireless ad hoc networks. Although directional transmissions are expected to provide significant improvements, directional MAC protocols introduce new kinds of problems. One such problem is deafness. Deafness is caused when a transmitter repeatedly attempts to communicate with its intended receiver, but it fails because the receiver has its beam pointed towards a direction away from the transmitter. This paper proposes RI-DMAC (Receiver-Initiated Directional MAC) to address the issue of deafness in directional MAC protocols. RI-DMAC is a combination of sender-initiated and receiver-initiated operations. The sender-initiated mode is the default mode and the receiverinitiated mode is triggered when the transmitter experiences deafness. In RI-DMAC, each node maintains a polling table and polls a potential deafness node using the RTR (Ready To Receive) frame after the completion of every dialog. The experimental results show that RI-DMAC improves throughput and fairness performance compared to existing directional MAC protocols.