一种基于认知无线电的自组网多信道MAC协议  

A multi-channel MAC protocol for ad-hoc networks based on cognitive radio

作　　者：闵军[1,2] 葛利嘉[3] 

机构地区：[1]宜宾学院网络与多媒体管理中心,四川宜宾644000 [2]宜宾学院计算物理重点实验室,四川宜宾644000 [3]重庆通信学院三系,重庆400035

出　　处：《信息化纵横》2009年第15期34-37,共4页

基　　金：国家自然科学基金项目(10577007);重庆市重点自然科学基金项目(CSTC;2007ba2017);四川省青年科技基金(03ZQ026-061)

摘　　要：针对节点具有多个可用信道的自组网的信道资源利用率问题,提出了一种基于认知无线电的MAC接入协议,协议根据网络中节点的邻居关系,通过认知推理对两跳邻居范围内的不同网络节点分配不同的驻留信道,驻留信道的选择考虑了避免信道干扰和冲突,每个节点只需要两部半双工收发信机就能够实现在多个信道上高效的数据收发。仿真结果表明,协议在网络总吞吐量、端到端时延等方面具有优良的性能,能很好地适用于节点密集的应用场合。Focusing on the spectrum resource utilization, a cognitive radio based on multi-channel MAC protocol for ad-hoc networks with multiple channels available is presented in this paper. The protocol follows a ＂reasoning＂ method to assign channels available to mobile hosts dynamically as its resident channel on condition that the channel has not been a resident channel of any other nodes among two-hop network neighborhood, thus protecting mobile hosts against interference and collision resulting from channel sharing among neighborhood. The protocol may leads to efficient data transmission on multiple channels with only two halfduplex transceiver in each node, at the same time with few control messages exchange. By presenting and analyzing simulation results, the protocol is shown to result in good performance in the aspects of packet delivery ratio and average end-to-end delay, which makes it well adaptive to the crowed ad hoc network environment.

关 键 词：自组网 认知无线电 信道分配 多信道 MAC协议 

分 类 号：TN929.5[电子电信—通信与信息系统]