认知用户基于预测的动态频谱接入算法
频谱接入技术的关键是解决认知用户如何选择合适的空闲信道以及认知用户间如何实现频谱共享。在公共控制信道较难获得的情况下,基于部分可观测Markov决策过程（POMDP）的频谱预测算法,可以显著地提高系统的吞吐量;由于认知用户之间缺少接入信息的交换,使得多个认知用户在同一时隙接入同一信道的冲突概率较大。针对多用户竞争冲突问题,通过引入竞争反馈的偏差因子,并利用均衡的混合信道选择策略对认知无线网络动态频谱接入过程进行研究。通过大量仿真对认知用户的吞吐量和频谱利用率以及碰撞率进行分析,研究表明,均衡的混合信道选择策略可以有效地提高系统的吞吐量及频谱利用率。...
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| Published in | 计算机应用研究 Vol. 32; no. 7; pp. 2097 - 2100 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
江南大学物联网工程学院,江苏无锡,214122
2015
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-3695 |
| DOI | 10.3969/j.issn.1001-3695.2015.07.043 |
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| Abstract | 频谱接入技术的关键是解决认知用户如何选择合适的空闲信道以及认知用户间如何实现频谱共享。在公共控制信道较难获得的情况下,基于部分可观测Markov决策过程（POMDP）的频谱预测算法,可以显著地提高系统的吞吐量;由于认知用户之间缺少接入信息的交换,使得多个认知用户在同一时隙接入同一信道的冲突概率较大。针对多用户竞争冲突问题,通过引入竞争反馈的偏差因子,并利用均衡的混合信道选择策略对认知无线网络动态频谱接入过程进行研究。通过大量仿真对认知用户的吞吐量和频谱利用率以及碰撞率进行分析,研究表明,均衡的混合信道选择策略可以有效地提高系统的吞吐量及频谱利用率。 |
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| AbstractList | TN919.7%TP301.6; 频谱接入技术的关键是解决认知用户如何选择合适的空闲信道以及认知用户间如何实现频谱共享.在公共控制信道较难获得的情况下,基于部分可观测Markov决策过程(POMDP)的频谱预测算法,可以显著地提高系统的吞吐量;由于认知用户之间缺少接入信息的交换,使得多个认知用户在同一时隙接入同一信道的冲突概率较大.针对多用户竞争冲突问题,通过引入竞争反馈的偏差因子,并利用均衡的混合信道选择策略对认知无线网络动态频谱接入过程进行研究.通过大量仿真对认知用户的吞吐量和频谱利用率以及碰撞率进行分析,研究表明,均衡的混合信道选择策略可以有效地提高系统的吞吐量及频谱利用率. 频谱接入技术的关键是解决认知用户如何选择合适的空闲信道以及认知用户间如何实现频谱共享。在公共控制信道较难获得的情况下,基于部分可观测Markov决策过程（POMDP）的频谱预测算法,可以显著地提高系统的吞吐量;由于认知用户之间缺少接入信息的交换,使得多个认知用户在同一时隙接入同一信道的冲突概率较大。针对多用户竞争冲突问题,通过引入竞争反馈的偏差因子,并利用均衡的混合信道选择策略对认知无线网络动态频谱接入过程进行研究。通过大量仿真对认知用户的吞吐量和频谱利用率以及碰撞率进行分析,研究表明,均衡的混合信道选择策略可以有效地提高系统的吞吐量及频谱利用率。 |
| Author | 薛伟 张东东 宋成君 |
| AuthorAffiliation | 江南大学物联网工程学院,江苏无锡214122 |
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| Author_FL | Xue Wei Zhang Dongdong Song Chengjun |
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| Author_xml | – sequence: 1 fullname: 薛伟 张东东 宋成君 |
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| ClassificationCodes | TN919.7%TP301.6 |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DocumentTitleAlternate | Cognitive users dynamic spectrum access algorithm based on prediction |
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| Keywords | 信道选择策略 均衡 偏差因子 deviation factor dynamic spectrum access channel selection strategy POMDP trade-off 动态频谱接入 |
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| Notes | 51-1196/TP Xue Wei, Zhang Dongdong, Song Chengjun （ School of Internet of Things Engineering, Jiangnan University, Wuxi Jiangsu 214122, China） dynamic spectrum access; POMDP; deviation factor; trade-off; channel selection strategy The key technology of the dynamic spectrum access is to solve the problem of choosing the proper channel and to realize the sharing of spectrum among the secondary users. When dedicated control channel was difficult to obtain, the spectrum prediction algorithm that based on the partially observable Markov decision process（POMDP） could significantly improve the throughput of the system. Lacking of exchange of control information among the secondary users, it increased the conflict probability of multiple cognitive users＇ accessing into the same channel at the same time slot. In order to solve the problem of competition conflicts among multiple users, this paper studied the process of cognitive wireless network dynamic spectrum access by introducing the deviation factor of competitive fe |
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| Publisher | 江南大学物联网工程学院,江苏无锡,214122 |
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| Snippet | 频谱接入技术的关键是解决认知用户如何选择合适的空闲信道以及认知用户间如何实现频谱共享。在公共控制信道较难获得的情况下,基于部分可观测Markov决策过程（POMDP）的频谱... TN919.7%TP301.6; 频谱接入技术的关键是解决认知用户如何选择合适的空闲信道以及认知用户间如何实现频谱共享.在公共控制信道较难获得的情况下,基于部分可观测Markov决策过... |
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| SubjectTerms | POMDP 信道选择策略 偏差因子 动态频谱接入 均衡 |
| Title | 认知用户基于预测的动态频谱接入算法 |
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