Research On The Application Of Potential Game In Channel Selection In Cognitive Radio Networks

In recent years,the traditional wireless network technology is gr adually difficult to meet the explosive growth of communication needs.And wireless resource spectrum is becoming increasingly scarce,cognitive radio network s technology is gradually being of concern.As a theory and method of competitive phenomena,game theory has played an important role in solving the problem of resource allocation in cognitive radio networks.As a special kind of game,potential game has many good attributes,such as limited increasing property,existence and uniqueness of Nash equilibrium.This paper mainly uses potential game theory to solve two key problems related to channel selection in cognitive radio networks technology,spectrum allocation and broadcasting retransmission.Spectrum allocation is a key technology in cognitive rad io networks.The known potential game model considers only the main factors that interference with each other when designing the utility function and the potential function.On the basis of the existing model,this paper considers the two factors of interf erence and throughput to design new utility function and potential function,and gives a new potential game model PG-TI.In this paper,we design a new spectrum allocation algorithm PG-TIA which is based on PG-TI.Simulation results show that the proposed PG-TIA algorithm has good convergence,and can effectively increase the system throughput,reduce the system transmission power,and show a good fairness of the algorithm.Broadcasting retransmission is a problem that must be taken into consideration in the process of cognitive radio networks data packet broadcasting.The purpose of broadcasting retransmission is to achieve reliable data transmission.While broadcasting retransmission occurs,the user how to choose the right channel for retransmission operation decided to focus on the efficiency and quality of transmission.This paper designs a retransmission model potential game based broadcasting PG-BR.In this model,two broadcasting retransmission protocol mechanism are designed to avoid the "conflict" problem,and the priority is set for different applications using the channel.In the utility function and the potential function in the design of energy consumption and interference of two factors considered.And this paper put forward a new retransmission potential game based broadcasting algorithm PG-BRA.Simulation results show that the proposed PG-BRA algorithm can increase the packet achievable rate,reduce the packet average retransmission times,reduce the average delay and reduce the system transmission power...