一种面向山区场景的多信道接入策略  

A multi-channel access algorithm for mountain scene

作　　者：彭艺[1] 谢钊萍 魏翔 朱桢以 PENG Yi;XIE Zhao-ping;WEI Xiang;ZHU Zhen-yi(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming 650500,Yunnan,China)

机构地区：[1]昆明理工大学信息工程与自动化学院,云南昆明650500

出　　处：《云南大学学报（自然科学版）》2022年第1期34-40,共7页Journal of Yunnan University(Natural Sciences Edition)

基　　金：国家自然科学基金(61761025)。

摘　　要：针对现有山区通信场景中认知无线电单信道传输的不可靠性问题,提出一种新型频谱感知与多信道接入策略.首先,为了解决传统山区场景模型准确性低和通用性差的缺点,利用Global Mapper软件对山区通信场景进行了3D高精度还原;然后,考虑到单信道传输效率低和通信保障能力不足的问题,在一元隐马尔可夫的基础上,得到一种多元隐马尔可夫算法;最后,以昆明市某山区信道质量数据进行验证.实验结果表明:在信道数为8的情况下,改进的多元模型碰撞概率和次要用户成功传输概率分别为24%和65%,具有更高的接入率和网络吞吐量.Aiming at the problem that unreliability of cognitive radio single-channel transmission in mountain area,a new type of spectrum sensor and channel access strategy is proposed.At first,in order to solve the shortcomings of low accuracy and weak versatility of traditional mountain area models,the Global Mapper software is used to perform 3 D high-precision restoration of mountain area.Then considering the problems of low single-channel transmission efficiency and insufficient communication guarantee capability,a multivariate hidden Markov algorithm is obtained on the basis of unary hidden Markov.Finally,it is verified with channel quality data in a mountainous area in Kunming.The experimental results show that when the number of channels is 8,the collision probability and the secondary user’s successful transmission probability of the improved multivariate model are 24%and 65%,respectively,which has a higher access rate and network throughput.

关 键 词：多信道接入 多元隐马尔可夫算法 山区通信 认知无线电 

分 类 号：TN929[电子电信—通信与信息系统]