电子学报 ›› 2014, Vol. 42 ›› Issue (6): 1147-1156.DOI: 10.3969/j.issn.0372-2112.2014.06.017

• 学术论文 • 上一篇    下一篇

一种基于代价的冒泡式多优先级认知无线电排队接入机制

许瑞琛, 蒋挺   

  1. 北京邮电大学信息与通信工程学院, 北京 100876
  • 收稿日期:2013-03-11 修回日期:2013-04-24 出版日期:2014-06-25
    • 作者简介:
    • 许瑞琛 男,1984年生于河南焦作.现为北京邮电大学信息与通信工程学院博士研究生,主要研究方向为认知无线电频谱接入机制和隐马尔科夫理论.E-mai:xurchen@126.com;蒋挺 男,1962年生于四川威远.现为北京邮电大学信息与通信工程学院教授,主要研究方向为通信技术,信息理论研究和应用.
    • 基金资助:
    • 国家自然科学基金 (No.61171176); 国家科技重大专项 (No.2010ZX03006-006)

A Cost Based Bubble-Queuing Access Scheme in Multi-Priority Cognitive Radio Network

XU Rui-chen, JIANG Ting   

  1. School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2013-03-11 Revised:2013-04-24 Online:2014-06-25 Published:2014-06-25

摘要:

本文首先根据认知无线电实际环境,在一类虚警事件和三类漏检事件的影响下,对M/G/1排队模型进行修正,给出主用户及次级用户数据传输时间的一阶矩和二阶矩的解析解,得到M/G/1-R(M/G/1-Revised)排队模型.其次在多优先级次级用户情境下,提出一种基于系统代价的冒泡式排队接入方案(B-M/G/1-R,Bubble-M/G/1-Revised),给出该方案能够最小化系统代价的证明过程.仿真与数值计算验证了M/G/1-R的有效性,在实际认知无线电环境下,B-M/G/1-R能够获得最小的系统代价和次级用户数据传输中断次数.

关键词: 认知无线电, 实际环境, M/G/1, 系统代价, 打断次数

Abstract:

This paper analyzes the impact on the average data transmission time of primary user (PU) and secondary users (SU),which is caused by the one kind of false alarm event and three kinds of undetected events in realistic cognitive radio (CR) environment.Based on the analysis,the M/G/1 queue model is rectified and the M/G/1-R queue model is obtained,in which the first moment and the second moment of data transmission time of PU and SU are derived.And a multi-priority bubble-queuing access scheme (B-M/G/1-R) based on systemic cost is proposed whose sorting method can minimize the systemic cost.Analytical results and simulation confirm the validity of M/G/1-R model.Also in realistic CR environment,B-M/G/1-R presents the smallest systemic cost and SU data transmission interrupted times.

Key words: cognitive radio, realistic environment, M/G/1, systemic cost, interrupted times

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