接收者视角选择信道的分布式多信道MAC协议  

A Distributed Multi-channel MAC Protocol for Receiver-Viewed Channel Choosing

作　　者：李可[1] 左德承[1] 杨孝宗[1] 宋煜[1] 

机构地区：[1]哈尔滨工业大学计算机科学与技术学院,哈尔滨150001

出　　处：《计算机仿真》2009年第3期144-148,239,共6页Computer Simulation

基　　金：预研基金(51416040105HT0734);"十一五"部委重点预研项目基金(51360301)

摘　　要：为了有效地利用无线信道资源并获得更好的网络性能,提出了一种新型的多信道的媒质接入控制协议,即接收者视角优先动态信道分配协议。对现有的多信道MAC协议存在的问题进行分析,并提出新的设计思想。在RMDA协议中,每个节点实时地将当前状态信息发送给邻居节点,并以接受者的视角结合邻居状态列表来选择通信的数据信道,减少冲突发生的概率,从而更有效地使用多信道增加了网络吞吐量。另外,协议明显地改善了数据包时延等网络性能,特别是当网络负载很大的情况下。仿真结果展示出提出的RMDA协议是一个的获得较高网络能力的多信道MAC协议,为多信道MAC协议的研究和发展提供一个新的思考视角。Wireless Channels are finite and precious in the multi - hop distributed wireless ad - hoc network, in order to use multi - channel efficiently and improve network performance significantly, this paper presents a new multi - channel MAC protocol, namely Receiver - viewed Multi - channel Dynamic Allocation （RMDA）. This essay analyzes the problem of existing multi - channel MAC protocol, such as DCA and MMAC etc, and puts forward a new design thought. In RMDA, every node sends the state information to its neighbor node in real time, and selects a data channel according to the list of neighbor state as a receiver perspective, in order to decrease the probability of conflict occurrence and increase network throughput by using multi - channel efficiently. In addition, the protocol improves network performance significantly, like delay of packets and so on, especially when the network is highly congested. Simulation results show that the RMDA in this paper, which can achieve a higher network capacity, is multi - channel MAC protocol. RMDA also presents a new idea for the development of multi - channel MAC protocol.

关 键 词：多跳分布式无线网络 多信道 媒质接入控制 接收者视角 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]