The Optimization of Spectrum Sensing Frame Time in Cognitive Radio
The ineffective usage of licensed spectrum due to the fixed spectrum allocation has raised a pressing problem of spectrum scarcity. In order to solve this problem, the cognitive radio is introduced to perform opportunistic usage of spectrum of primary user by a secondary user, without interfering with the quality of primary user. Therefore a secondary user should be capable of spectrum sensing. In this paper, we study the problem of designing the optimal spectrum sensing frame time, under considering dynamics of the state of primary user and restriction on collision probability of primary user, so as to maximize the expected net reward in throughput of a multiplechannel cognitive radio network in which there is at least a idle channel at one time, meanwhile, the energy cost of spectrum sensing and data transmission and channel switching is taken into account. We analyze the problem using the framework of partially observable Markov decision processes (POMDP).
cognitive radio spectrum sensing spectrum sensing frame time POMDP
Dongmei Shu Jinkuan Wang Xin Song Bin Wang
Northeastern University at Qinhuangdao Northeastern University Qinhuangdao China
国际会议
秦皇岛
英文
372-375
2010-11-05（万方平台首次上网日期，不代表论文的发表时间）