Collision-driven Random Multiuser Opportunistic Spectrum Access

被引:0
作者
Wang, Yumeng [1 ]
Shen, Liang [1 ]
Xu, Chenglong [1 ]
Zhang, Haitao [1 ]
Dong, Xiaohua [1 ]
Chen, Yang [1 ]
机构
[1] PLA Univ Sci & Technol, Inst Commun Engn, Nanjing 210007, Jiangsu, Peoples R China
来源
2013 3RD INTERNATIONAL CONFERENCE ON COMPUTER SCIENCE AND NETWORK TECHNOLOGY (ICCSNT) | 2013年
基金
美国国家科学基金会;
关键词
Cognitive Radio; Opportunistic Spectrum Access; POMDP; Distributed Multiuser; COGNITIVE RADIO; NETWORKS;
D O I
暂无
中图分类号
TP3 [计算技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, the problem of distributed multiuser Opportunistic Spectrum Access is studied based on Partially Observable Markov Decision Process (POMDP), where the channels are partially observed by secondary users (SUs) constrained by hardware and energy. Considering the similarity of spectrum environment, the decision of every secondary user may be the same, which leads to collisions. Comparing with the previous works, we propose a "collision-driven random" strategy, where the activities of secondary users are relatively steady but changing over time. If a secondary collides with others when transmitting data in one time slot, it may take the action of selecting a channel randomly according to choosing probability at next time slot. Otherwise, the secondary user stays on the current channel. Observing the simulation results, the upgrade of performance is up to 100% compared with the existing strategies.
引用
收藏
页码:792 / 796
页数:5
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