Title :
Energy-efficient spectrum sharing in relay-assisted cognitive radio systems
Author :
Mhiri, Mohamed ; Cheikhrouhou, K. ; Samet, Ahmed ; Meriaux, Francois ; Lasaulce, Samson
Author_Institution :
Tunisia Polytech. Sch., Univ. of Carthage, La Marsa, Tunisia
Abstract :
This work characterizes an important solution concept of a relevant spectrum game. Two energy-efficient sources communicating with their respective destination compete for an extra channel brought by a relay charging the used bandwidth through a pricing mechanism. This game is shown to possess a unique Nash bargaining solution, exploiting a time-sharing argument. This Pareto-efficient solution can be implemented by using a distributed optimization algorithm for which each transmitter uses a simple gradient-type algorithm and alternately updates its spectrum sharing policy. Typical numerical results show to what extent spectral efficiency can be improved in a system involving selfish energy-efficient sources.
Keywords :
Pareto distribution; Pareto optimisation; cognitive radio; energy conservation; game theory; gradient methods; pricing; radio spectrum management; radio transmitters; relay networks (telecommunication); telecommunication industry; wireless channels; Pareto-efficient solution; distributed optimization algorithm; energy-efficient spectrum sharing; pricing mechanism; radio transmitter; relay charging; relay-assisted cognitive radio system; relevant spectrum game; simple gradient-type algorithm; time-sharing argument; unique Nash bargaining solution; wireless channel; NIST; Optical transmitters; Nash bargaining solution; cognitive radio; cooperative transmission; resource allocation;
Conference_Titel :
Network Games, Control and Optimization (NetGCooP), 2012 6th International Conference on
Conference_Location :
Avignon
Print_ISBN :
978-1-4673-6026-5
