计算机应用研究2011，Vol.28Issue(2)：639-641,3.DOI:10.3969/j.issn.1001-3695.2011.02.065
认知无线电网络分布式多信道MAC协议
Distributed multi-channel MAC protocol in cognitive radio networks
摘要
Abstract
The MAC protocols are used for channel sensing, selection and access in cognitive radio(CR) networks.This paper proposed a distributed multi-channel MAC(CR-MMAC) protocol in CR networks based on multi-channel MAC(MMAC)protocol, according to the two-phases sensing mechanisms defined by the IEEE 802.22 standard.The protocol took two-phases sensing mechanisms and distributed negotiation into account, used idle spectrum for communication and adopted reservation mechanism in the stage of channel negotiation of ATIM window of MMAC protocol, which avoided competition collision caused by the CR nodes choosing the same channel for data transmission stage using CSMA/CA.The simulation comparisons show that, CR-MMAC protocol improves network throughput, decreases communication delay, and the comprehensive performance is better than MMAC protocol.关键词
认知无线电网络/MAC协议/多信道MAC协议分类
信息技术与安全科学引用本文复制引用
冯文江,陈倩,李林,沈嘉皓..认知无线电网络分布式多信道MAC协议[J].计算机应用研究,2011,28(2):639-641,3.基金项目
国家自然科学基金资助项目(60872038) （60872038）
国家"211"工程创新人才培养计划资助项目(S-09102) （S-09102）
重庆市教委科技资助项目(KJ102201) （KJ102201）
