Resource allocation in heterogeneous cooperative cognitive radio networks

作者：Awoyemi Babatunde S^*; Maharaj Bodhaswar T; Alfa Attahiru S

来源：International Journal of Communication Systems, 2017, 30(11): e3247.

DOI：10.1002/dac.3247

• cognitive radio networks
• cooperative diversity
• heterogeneous users
• heuristic
• linear and nonlinear programming
• resource allocation

In cognitive radio networks (CRNs), resources available for use are usually very limited. This is generally because of the tight constraints by which the CRN operate. Of all the constraints, the most critical one is the level of permissible interference to the primary users. Attempts to mitigate the limiting effects of this constraint, thus achieving higher productivity, are a current research focus, and in this work cooperative diversity is investigated as a promising solution. Cooperative diversity has the capability to achieve diversity gain for wireless networks. In the work, therefore, the possibility of and mechanism for achieving greater utility for the CRN when cooperative diversity is incorporated are studied. To accomplish this, a resource allocation model is developed and analyzed for the heterogeneous, cooperative CRN. In the model, during cooperation, a best relay is selected to assist the secondary users that have poor channel conditions. Overall, the cooperation makes it feasible for virtually all the secondary users to improve their transmission rates while still causing minimal harm to the primary users. The results show a marked improvement in the resource allocation performance of the CRN when cooperation is used in contrast to when the CRN operates only by direct communication.

• 出版日期2017-7-25