TIIS (한국인터넷정보학회)
Current Result Document :
| 한글제목(Korean Title) |
Optimal Opportunistic Spectrum Access with Unknown and Heterogeneous Channel Dynamics in Cognitive Radio Networks |
| 영문제목(English Title) |
Optimal Opportunistic Spectrum Access with Unknown and Heterogeneous Channel Dynamics in Cognitive Radio Networks |
| 저자(Author) |
Yuli Zhang
Yuhua Xu
Qihui Wu
Alagan Anpalagan
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| 원문수록처(Citation) |
VOL 08 NO. 08 PP. 2675 ~ 2690 (2014. 08) |
한글내용
(Korean Abstract) |
|
영문내용
(English Abstract) |
We study the problem of optimal opportunistic spectrum access with unknown and heterogeneous channel dynamics in cognitive radio networks. There is neither statistic information about the licensed channels nor information exchange among secondary users in the respective systems. We formulate the problem of maximizing network throughput. To achieve the desired optimization, we propose a win-shift lose-stay algorithm based only on rewards. The key point of the algorithm is to make secondary users tend to shift to another channel after receiving rewards from the current channel. The optimality and the convergence of the proposed algorithm are proved. The simulation results show that for both heterogeneous and homogenous systems the proposed win-shift lose-stay algorithm has better performance in terms of throughput and fairness than an existing algorithm. |
| 키워드(Keyword) |
Cognitive radio
opportunistic spectrum access
distributed channel selection
global optimization
heterogeneous
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| 파일첨부 |
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