通信学报 ›› 2013, Vol. 34 ›› Issue (12): 11-19.doi: 10.3969/j.issn.1000-436X.2013.12.002

• 学术论文 • 上一篇    下一篇

带有组间切换的认知无线网络混合式信道分配策略及性能研究

金顺福1,2,解洪亭3,赵媛1,2   

  1. 1 燕山大学信息科学与工程学院,河北秦皇岛066004
    2 河北省计算机虚拟技术与系统集成重点实验室,河北秦皇岛066004
    3 山东中医药大学附属医院网络中心,山东济南250011
  • 出版日期:2013-12-25 发布日期:2017-07-05
  • 基金资助:
    国家自然科学基金资助项目;河北省自然科学基金资助项目

Hybrid channel allocation strategy with group switching and performance evaluation in cognitive radio network

Shun-fu JIN1,2,Hong-ting XIE3,Yuan ZHAO1,2   

  1. 1 College of Information Science and Engineering, Ya han University, Qinhuangdao 066004, China
    2 Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province, Qinhuangdao 066004, China
    3 Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250011, China
  • Online:2013-12-25 Published:2017-07-05
  • Supported by:
    The National Natural Science Foundation of China;The Natural Science Foundation of Hebei Province

摘要:

针对认知无线网络中的非实时通信业务,综合使用随机退避方式和控制中心调度方式,考虑两组授权信道,提出一种带有组间切换机制的混合式信道分配策略。基于认知用户数据分组数量及两组授权信道上分别传输的授权用户数据分组数量,建立三维 Markov 模型,导出认知用户的阻塞率、数据丢失率及平均延迟等性能指标表达式。数值实验和系统仿真的结果表明,随着退避时间的变化,不同性能指标间存在一定的折衷关系,通过选取最低的系统成本,给出退避参数的优化设置方案。

关键词: 认知无线网络, 混合式频谱分配, 组间切换, Markov模型, 退避时间

Abstract:

Considering the non-real-time traffic in cognitive radio networks and two groups of licensed channels,com-bing the methods of random back-off and control center schedule,a novel hybrid channe allocation strategy with channel group switching mechanism was proposed.Taking into account the total number of the cognitive packets and the numbers of the primary packets on each group channels,a three-dimensional Markov model was constructed,some cogniti user measures in terms of the blocking ratio,the packet loss ratio and the average delay were derived accordingly.Numerical results with analysis and simulation show that,as the back-off time changes,a tradeoff exists between different perfor-mance measures.Therefore,by minimizing the system cost,the back-off time can be optimized.

Key words: cognitive radio network, hybrid spectrum allocation, group switching, Markov model, back-off time

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