Cognitive radio game for secondary spectrum access problem

Authors:
Alireza Attar;Mohammad Reza Nakhai;A. Hamid Aghvami
Affiliations:
Centre for Telecommunications Research, King’s College London, London, UK;Centre for Telecommunications Research, King’s College London, London, UK;Centre for Telecommunications Research, King’s College London, London, UK
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

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Abstract

In this paper we develop a framework for resource allocation in a secondary spectrum access scenario, where a group of Cognitive Radios (CR) access the resources of a primary system. We assume the primary system is a cellular OFDM-based network operating in uplink. We develop an optimum resource allocation strategy, using cooperative Game Theory, which guarantees the primary's required QoS and allocates an achievable rate at a given bit error rate for the secondary, when possible. The proposed Cognitive Radio Game (CRG) is a network-assisted resource management method, where users (both primary and secondary) inform the primary system's BS of their channel state information and power limitation and the base station calculates the optimum sub-channel and power allocation for all users. Using Game theoretic axiom of fairness, i.e., Nash Bargaining Solutions (NBS), we develop an alternative efficient and fair resource allocation and compare its performance with the proposed CRG method. We use Sequential Quadratic Programming (SQP) to solve the proposed nonlinearly constrained CRG optimization problem.