Ad Hoc网络中基于距离的机会频谱接入方案  

Opportunistic Spectrum Access Based on Distance Over Ad Hoc Networks

作　　者：孙君[1] 朱洪波[1] 

机构地区：[1]南京邮电大学江苏省无线通信重点实验室通信与信息工程学院通信技术研究所,江苏南京210008

出　　处：《电子学报》2011年第7期1679-1682,共4页Acta Electronica Sinica

基　　金：国家青年基金(No.61001080);第二批博士后特别资助基金(No.200902528);国家973重点基础研究发展计划基金(No.2007CB310600);国家863高技术研究发展计划基金(No.2009AA011300);国家科技重大专项课题(No.2009ZX03003-002;No.2009ZX03007-004;No.2011ZX03005-005)

摘　　要：本论文研究ad hoc网络中的机会频谱接入(OSA)技术,建立一种既能够抑制次用户对主用户的干扰,又能够在非合作次用户间进行公平、无冲突的资源共享的接入机制.解决了在自组织的多用户ad hoc网络中,主次用户以及次用户之间共享频谱资源,次用户选择最佳频谱接入,并确保抑制对主用户的干扰以及自身性能优化的问题.为此,建立次用户和可用信道之间的双向选择机制.在定义了由距离决定的信道可用度的基础上,引入次用户对信道的选择因子,次用户根据自己的业务特征和传输要求选择最适合的可用信道.结果表明,这种主次用户之间双向选择的接入机制可以有效地避免主次用户以及次用户之间的资源使用冲突,实现了对频谱资源的合理有效利用.The opportunistic spectrum access（OSA） techniques in the ad hoc network are researched in this paper.An access scheme is proposed,which can not only suppress the interference between the secondary and the primary users,but also realize the fair and non-conflict resource sharing among secondary users.The solved problems include the spectrum sharing,and the optimal channel selection for secondary users which assure both the interference suppression and the self-optimization.For these purposes,the double selection scheme is built between the secondary users and the available channels.Factors to select channels for secondary users are defined based on the channel available degree.So,the secondary users can select the most appropriate channel according to the service and transfer characteristics.The results prove that the double selection scheme can avoid the conflict and realize the efficient resource sharing.

关 键 词：机会频谱接入 MAC层协议 跨层设计 频谱共享 ad HOC网络 

分 类 号：TN911[电子电信—通信与信息系统]