Abstract-In a cognitive radio network (CRN), spectrum opportunities should be efficiently utilized through careful coordination between cognitive radio (CR) users. In this paper, we formulate the coordinated channel access as a joint power/rate control and channel assignment optimization problem, with the objective of maximizing the sum-rate achieved by all CRs over all channels. The problem is formulated under a generalized multi-level spectrum opportunity framework, which reflects the microscopic spatial opportunity available to CRs. A centralized polynomial-time approximate algorithm to the problem is developed. We prove the algorithm's correctness and show its accuracy through numerical examples.
The previous work is extended in REF by maximizing the sum-rate achieved by all cognitive radios over all channels.
Coordinated Channel Access in Cognitive Radio Networks: A Multi-Level Spectrum Opportunity Perspective
IEEE INFOCOM 2009
IEEE INFOCOM 2009
Computer Science