Achieving Fair Spectrum Allocation and Reduced Spectrum Handoff in Wireless Sensor Networks: Modeling via Biobjective Optimization

Abstract

This paper considers the problem of centralized spectrum allocations in wireless sensor networks towards the following goals: (1) maximizing fairness, (2) reflecting the priority among sensor data, and (3) avoiding unnecessary spectrum handoff. We cast this problem into a multiobjective mixed integer nonconvex nonlinear programming that is definitely difficult to solve at least globally without any aid of conversion or approximation. To tackle this intractability, we first convexify the original problem using arithmetic-geometric mean approximation and logarithmic change of the decision variables and then deploy weighted Chebyshev norm-based scalarization method in order to collapse the multiobjective problem into a single objective one. Finally, we apply simple rounding method in order to obtain approximate integer solutions. The results obtained from the numerical experiments show that, by adjusting the weight on each objective function, the proposed algorithm allocates spectrum bands fairly with well observing each sensor's priority and reduced spectrum handoffs.

Fair Dynamic Spectrum Allocation Using Modified Game Theory for Resource-Constrained Cognitive Wireless Sensor Networks

“…The authors explained the proportional fairness using the NBS concept. There are also many studies on the proportional fair resource allocation in wireless sensor networks, such as [18].…”

SDR Based Energy Detection Spectrum Sensing in Cognitive Radio for Real Time Video Transmission

“…According to spectrum, survey conducted by the Federal Communication Commission (FCC) has indicated that the actual licensed spectrum is not utilized properly for various time, frequency, and geographical locations [1]. Also the demand of allocating and using the radio frequency spectra is rapidly growing due to increasing number of wireless applications [2]. An unlicensed user or secondary user may utilize this band when licensed user is absent.…”