电子学报 ›› 2016, Vol. 44 ›› Issue (6): 1496-1503.DOI: 10.3969/j.issn.0372-2112.2016.06.034

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认知无线网络中频谱切换算法研究综述

马彬1,2, 包小敏1, 谢显中2   

  1. 1. 重庆邮电大学移动通信技术重庆市重点实验室, 重庆 400065;
    2. 重庆邮电大学重庆市计算机网络与通信技术重点实验室, 重庆 400065
  • 收稿日期:2014-12-17 修回日期:2015-02-04 出版日期:2016-06-25 发布日期:2016-06-25
  • 作者简介:马彬 男,1978年出生,四川人.博士,重庆邮电大学副教授,主要研究方向为认知无线电网络、异构无线网络、不确定智能算法等.E-mail:mab_cqupt@sina.com;包小敏 女,1990年出生,重庆人.现为重庆邮电大学通信与信息工程学院硕士研究生.主要研究方向为认知无线电.E-mail:baoxiaomin19900526@163.com;谢显中 男,1965年出生,四川人.重庆邮电大学博士/教授/博士生导师/重点实验室主任.主要研究方向为认知无线电、无线通信技术等.E-mail:xiexzh@cqupt.edu.cn
  • 基金资助:

    国家自然科学基金(No.61271259,No.61301123,No.61471076);重庆市教委科学技术研究项目(No.KJ130536);长江学者和创新团队发展计划资助(No.IRT1299);重庆市科委重点实验室专项经费资助

Spectrum Handoff Algorithm in Cognitive Radio Networks:A Survey

MA Bin1,2, BAO Xiao-min1, XIE Xian-zhong2   

  1. 1. Chongqing Key Laboratory of Mobile Communications Technology, Chongqing University of Post and Communications, Chongqing 400065, China;
    2. Chongqing Key Laboratory of Computer Network and Communication Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China
  • Received:2014-12-17 Revised:2015-02-04 Online:2016-06-25 Published:2016-06-25

摘要:

无线频谱资源的匮乏和多用户争用环境,导致认知无线网络中频谱切换研究面临严峻挑战.本文阐述了频谱切换的基本原理,包括频谱切换的概念和特征、频谱切换的主动决策和被动决策分类、频谱切换过程及建模抽象的方法等几个方面.其次,重点以数学建模工具为主线,综述了基于概率论、马尔可夫过程、排队论、模糊逻辑、模糊神经网络等5类代表性的频谱切换算法,评述了学术界在各类频谱切换算法上的重要研究成果;最后,基于对已有算法和研究成果的分析,总结了当前研究中存在的非理想频谱检测、目标信道选择、空闲信道动态性等主要问题,预测了频谱切换的未来研究方向.

关键词: 认知无线网络, 频谱切换, 切换方法, 切换过程, 抽象方法

Abstract:

The research of the cognitive radio networks is facing rigorous challenges with the insufficience of the radio spectrum resources and multi-user contention environment.The fundamental principles of the spectrum handoff was elaborated, including the concepts and characteristics of the spectrum handoff, the classification of the proactive and reactive decisions of the spectrum handoff, spectrum handoff process abstract modeling methods, etc.Then five spectrum handoff algorithms based on the probability theory, Markov process, queuing theory, fuzzy logic, fuzzy neural network, were summarized, which were mainly on the ground of mathematic modeling tools.Some significant research findings of each spectrum handoff algorithm in the academic circle were reviewed.Finally, on account of the analysis of the existing algorithms and research achievements, some important problems of imperfect spectrum detection, target channel selection, idle channel dynamic character that were existed in the current research were summarized and the future research direction of the spectrum handoff were predicted.

Key words: cognitive radio networks, spectrum handoff, handoff approach, handoff process, abstract approach

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