Analysis of Cognitive Radio Spectrum Access with Finite Primary Users and Infinite Secondary Users
In the cognitive radio networks, the users’ spectrum access behavior determines the system capacity and spectrum utilization. There are three classical schemes for cognitive radio spectrum access: the random channel assignment, the reservation based assignment and the non-random channel assignment. In this paper, we study the performance of these schemes in a new scenario: a cognitive radio network with finite primary users and infinite secondary users. We model the users’ behavior in these schemes by Markov chains. Moreover, the blocking, transition and dropping probabilities of the secondary users based on the user connection rate are derived as the performance metrics. Furthermore, we evaluate the secondary system capacity of these schemes. Numerical results show that the random and nonrandom channel assignments can get the lowest blocking probability, the reservation based assignment can get the lowest dropping probability, and the non-random channel assignment can provide the most system capacity and avoid the channel handoff for the secondary users.
Qiming Tian Chuan Ma Guanding Yu Aiping Huang
Dept.of Computer Wenzhou Vocational & Technical College Wenzhou 325035, China Dept.of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027, China
国际会议
上海
英文
1-5
2010-10-20（万方平台首次上网日期，不代表论文的发表时间）