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题名: 基于Galois域的异构认知无线网络信道跳频汇合算法
其他题名: Galois-field-based channel hopping rendezvous algorithms for heterogeneous cognitive radio networks
作者: 杨博; 郑萌; 梁炜
作者部门: 工业控制网络与系统研究室
关键词: 认知无线网络 ; 信道汇合 ; 跳频 ; 异构网络 ; Galois域
刊名: 中国科学:信息科学
ISSN号: 1674-7267
出版日期: 2015
卷号: 45, 期号:6, 页码:752-765
收录类别: CSCD
产权排序: 1
项目资助者: 中国科学院战略性先导科技专项(批准号:XDA06021000)资助
摘要: 信道汇合是认知无线网络中次用户之间选择公共可用信道并建立通信链路的过程,是通信的前提和基础.针对次用户可用信道集合不同的异构认知无线网络难以保证信道汇合的问题,本文提出一套基于Galois域的信道汇合算法,具体包括面向全局信道和面向局部信道的汇合算法.该算法利用Galois域的加和乘运算生成周期性跳频序列,各周期序列包括顺时针方向遍历的信道、校验信道、逆时针方向遍历的信道3个阶段.面向局部信道的汇合算法是针对分布式环境中次用户无法获取全局信道信息而提出的.此外,本文对两种算法的最长汇合时间进行了理论分析.仿真结果表明,与已有算法相比,在全局信道和局部信道两种条件下,所提算法都具有更短的平均汇合...
英文摘要: Channel rendezvous is a prerequisite in cognitive radio networks, where secondary users choose a common available channel and establish a connection. It is difficult to guarantee rendezvous in heterogeneous cognitive radio networks, where no universal channel set is shared among secondary users. In this paper, we propose two Galois-field-based channel hopping (GFCH) heterogeneous rendezvous algorithms: one is global-channel-oriented and the other is local-channel-oriented. The algorithms generate periodic channel-hopping sequences by performing the operations of plus and multiply in the Galois field. The sequence in each period includes three phases: access all the channels in a clockwise direction, access the parity channel, and access all the channels in a counterclockwise direction. As in a distributed environment, global channels may not be shared among secondary users; we then propose a local Galois-field-based channel hopping (L-GFCH) rendezvous algorithm utilizing only local available channels. Furthermore, we analyze the theoretical values of the maximum-time-to-rendezvous of GFCH and L-GFCH. Extensive simulations confirm that GFCH and L-GFCH outperform existing algorithms in terms of expected-time-to-rendezvous in global and local scenarios, respectively.
语种: 中文
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内容类型: 期刊论文
URI标识: http://ir.sia.cn/handle/173321/16863
Appears in Collections:工业控制网络与系统研究室_期刊论文

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