Energy-Efficient Spectrum Sharing in Relay-Assisted Cognitive Radio Systems

Mariem Mhiri (1) , Karim Cheikhrouhou (1) , Abdelaziz Samet (1) , François Mériaux (2) , Samson Lasaulce (2)

1 LIM - Laboratoire d'Ingénierie Mathématique
2 L2S - Laboratoire des signaux et systèmes

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.

Domaines: Réseaux et télécommunications [cs.NI]

Mariem Mhiri, Karim Cheikhrouhou, Abdelaziz Samet, François Mériaux, Samson Lasaulce. Energy-Efficient Spectrum Sharing in Relay-Assisted Cognitive Radio Systems. the International Conference on Network Games, Control and Optimization (NetGCooP), Nov 2012, Avignon, France. pp.1-6. ⟨hal-00782036⟩