|
|
|
| Reward Based Multichannel Step-queuing Access Scheme in Cognitive Radio |
| Wang Ling Peng Qi-cong Peng Qi-hang |
| School of Communication and Information Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China |
|
|
|
|
Abstract This paper investigates continued-time two-dimensional birth-and-death process with priority in cognitive radio system. To simplify analysis, one-dimensional queuing model without priority is derived to equalize the complicated process. And a step-queuing scheme based on channel reward in multichannel scene is proposed, whose block probability and force termination probability performance determined by the Queuing-Structure Coefficient (QSC). Analytical results and simulation confirm the equivalent queuing model without priority valid. Also some diverse access scheme are compared in performance, step-queuing scheme presents a lower block probability and an adaptive force termination probability.
|
|
Received: 28 November 2011
|
|
|
|
Corresponding Authors:
Wang Ling
E-mail: wangling827@uestc.edu.cn
|
|
|
|
|
|
|
2012, Vol. 34 
