Traffic sensitive spectrum access scheme for cognitive radio networks  

作　　者：陆佃杰 Huang Xiaoxia Zhang Guijuan Fan Jianping 

机构地区：[1]Institute of Computing Technology,Chinese Academy of Sciences [2]Graduate University of Chinese Academy of Sciences [3]Shenzhen Institute of Advanced Technology,Chinese Academy of Sciences

出　　处：《High Technology Letters》2014年第1期22-28,共7页高技术通讯（英文版）

基　　金：Supported by the National High Technology Research and Development Programme of China(No.2011AA010503);the National Natural Science Foundation of China(No.60903192)

摘　　要：A traffic sensitive spectrum access scheme is proposed to satisfy the traffic load requirement of secondary users （SUs）. In the proposed design, SU only accesses available channels which can meet the traffic demand. To achieve this, the expected transmission time （E3W） of the SU is calcu- lated first based on the delivery ratio. Then, the channel idle time is estimated based on the activity of primary users （PUs）. Therefore, available channels with estimated idle time longer than ETr could be chosen. With high probability, the SU can finish transmission on these channels without disruption, thereby satisfying the traffic load demand of the SU. Finally, our method is extended to the multi-channel scenario where each SU can access multiple channels simultaneously. Performance analysis shows that our method satisfies the requirement of SUs while effectively improving the throughput.A traffic sensitive spectrum access scheme is proposed to satisfy the traffic load requirement of secondary users(SUs).In the proposed design,SU only accesses available channels which can meet the traffic demand.To achieve this,the expected transmission time(ETT) of the SU is calculated first based on the delivery ratio.Then,the channel idle time is estimated based on the activity of primary users(PUs).Therefore,available channels with estimated idle time longer than ETT could be chosen.With high probability,the SU can finish transmission on these channels without disruption,thereby satisfying the traffic load demand of the SU.Finally,our method is extended to the multi-channel scenario where each SU can access multiple channels simultaneously.Performance analysis shows that our method satisfies the requirement of SUs while effectively improving the throughput.

关 键 词：opportunistic spectrum access expected transmission time cognitive radio net-work 

分 类 号：TN925[电子电信—通信与信息系统]