Dear Sobana Rani,

In the follow paper, the writer introduces and analyzes two novel priority service disciplines for opportunistic spectrum access (OSA) networks which take advantage of interruptions to preempt low priority traffic at a low cost. Analytical results, in addition to simulation results to validate their accuracy, are also provided and illustrate the impact of different OSA network parameters on the average system time.

https://arxiv.org/pdf/1203.6413.pdf

The following thesis may also be useful for you :

http://www.diva-portal.org/smash/get/diva2:580809/FULLTEXT01.pdf

Thank You Sir for your valuable answer.

You can follow there paper:

1. A survey of spectrum sensing algorithms for cognitive radio applications

http://www2.ic.uff.br/~ejulio/doutorado/artigos/04796930.pdf

2. NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey

3. Analysis and design of cognitive radio networks and distributed radio resource management algorithms