第4讲 认知无线电中基于频谱数据库的共存技术研究  

Research of Spectrum Database Assisted Coexistence Technology in Cognitive Radio

作　　者：薛震[1] 沈良[2] 丁国如[2] 吴启晖[2] 姚俊楠 

机构地区：[1]解放军理工大学通信工程学院研究生1队,江苏南京210007 [2]解放军理工大学通信工程学院 [3]南京军区装备部,江苏南京210000

出　　处：《军事通信技术》2015年第1期98-104,共7页Journal of Military Communications Technology

基　　金：国家自然科学基金资助项目(60932002);江苏省自然科学基金资助项目(BK2011116)

摘　　要：动态频谱接入技术能够有效缓解日益突出的频谱资源紧缺问题,然而随着认知无线电技术的发展,多个次级网络接入授权频段面临的共存问题也变得更加严峻。近年来的研究表明,传统的频谱感知结果可靠性不足,无法充分保证异构网络间的共存。基于地理频谱数据库的共存技术,能够为网络提供可用频谱信息以及共存信息,从而使得异构网络的共存成为可能。文章首先阐述了地理频谱数据库的发展趋势和技术挑战,接着分析了异构网络共存面临的挑战和研究现状,然后提出了一个基于地理频谱数据库接入授权频谱的系统架构,最后介绍了异构网络共存的关键技术和主要的共存机制,进一步地,为指导共存机制和算法的设计将共存问题公式化地描述成具有一般性的优化问题。The emergence of Dynamic Spectrum Access（DSA） technology has effectively alle- viated the scarcity of spectrum resources. However, as the intensive research of Cognitive Radio （CR） technology, the coexistence problem of multiple secondary networks access to the licensed spectrum is becoming more serious. Recent studies have shown that the traditional spectrum sensing is not reliable enough to guarantee the coexistence between heterogeneous networks. The coexistence technology based on geolocation spectrum database can provide networks available spectrum information and coexistence information, which makes it possible for the coexistence of heterogeneous networks. Firstly, the development tendencies and the state-of-the-art technical challenges of geolocation spectrum database were illustrated~ and then the challenges and the re- search status of haterogeneous networks coexistence were analyzed. Secondly, a geolocation spec- trum database assisted system framework was proposed, which enables the secondary networks/ users access to the licensed spectrum. Finally, the key coexistence technologies and main coexis- tence mechanisms were introduced. Furthermore, to guide the design of coexistence mechanisms and algorithms, a generic optimization problem was formulated according to the coexistence problem.

关 键 词：动态频谱接入 认知无线电技术 地理频谱数据库 异构网络共存 

分 类 号：TN929.5[电子电信—通信与信息系统]