Title :
Efficient Spectrum Utilization on TV Band for Cognitive Radio Based High Speed Vehicle Network
Author :
Tao Jiang ; Zhiqiang Wang ; Lei Zhang ; Daiming Qu ; Ying-Chang Liang
Author_Institution :
Dept. of Electron. & Inf. Eng., Huazhong Univ. of Sci. & Technol., Wuhan, China
Abstract :
It is well known that broadband wireless communications (BWC) are necessary for high speed vehicles since passengers need many broadband wireless multimedia services. However, one design challenge is to identify sufficient spectrum resource to support BWC in high speed vehicles. Recently, cognitive radios (CRs) are being considered as a promising technology to solve scarcity problem of spectrum resource. Therefore, we investigate the spectrum resource allocation problem in the CR based high speed vehicle network (CR-HSVN) in this paper. Specifically, we propose a spectrum resource allocation framework, where high speed vehicles could effectively utilize the TV white spaces. Subsequently, we formulate the allocation of spectrum resource as an optimization problem to maximize the available spectrum resources (i.e., TV white spaces) utilized by the CR-HSVN, and investigate the property of the CR-HSVN to reduce the complexity by separation computing method without loss of optimality. Furthermore, we analyze the optimal solution based on branch and bound method, the suboptimal solutions based on single channel and linear programming, respectively. Simulation results show that the proposed framework could offer excellent performances of the spectrum utilization and fairness for the CR-HSVN. Meanwhile, the aggregated interference from vehicles to primary users is constrained.
Keywords :
cognitive radio; linear programming; multimedia communication; tree searching; BWC; CR based high speed vehicle network; CR-HSVN; TV band; TV white spaces; branch and bound method; broadband wireless communications; broadband wireless multimedia services; cognitive radio; efficient spectrum utilization; high speed vehicle network; linear programming; optimization problem; single channel; spectrum resource allocation framework; spectrum resource allocation problem; Cognitive radio; Interference; Optimization; Resource management; TV; Vehicles; Broadband wireless communications; Jain´s fairness index; cognitive radio; high speed vehicle; spectrum resource allocation;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2014.2346769