Dynamic Spectrum Allocation in Wireless Cognitive Sensor Networks: Improving Fairness and Energy Efficiency

Abstract- This paper considers the centralized spectrum allo-cations in resource-constrained wireless sensor networks with the following goals: (1) allocate spectrum as fairly as possible, (2) util-ize spectrum resource maximally, (3) reflect the priority among sensor data, and (4) reduce spectrum handoff. The problem is formulated into a multi-objective problem, where we propose a new approach to solve it using modified game theory (MGT). In addition, cooperative game theory is adopted to obtain approxi-mated solutions for MGT in reasonable time. The results ob-tained from numerical experiments show that the proposed algo-rithm allocates spectrum bands fairly with well observing each sensor’s priority and nearly minimal spectrum handoffs. I