协作通信中双中继的服务和频谱价格竞争

Service and spectrum price competition of duopoly relays in cooperative networks

协作中继通信中,为了促进节点的协作,研究了协作通信中理性的双中继面对相同用户群的竞争行为。利用博弈论,建立了一种促进空闲节点参与协作且便于用户监控服务质量的频谱买卖模型;基于该模型研究了有固定空闲频谱和非固定空闲频谱的双中继定价策略。对有固定空闲频谱的双中继的价格竞争,证明了纳什均衡的存在和唯一性,给出了实现纳什均衡的分布式价格调整算法;对可灵活申请频谱的双中继的价格竞争,设计了引导两中继分布式达到纳什均衡的定价策略,在该机制下,两中继实现了维护各自用户群的最大效益。

The competitive behavior of duopoly relays in cooperative communication when facing the same users is analyzed.Game theory is exploited to construct an economic model of spectrum trading to stimulate idle nodes＇ cooperation,which is easy for users to monitor service quality;based on the model,the pricing strategies of relays with fixed available bandwidth and with flexible resale bandwidth are analyzed.On the price competition of duopoly relays with fixed available bandwidth,the existence and uniqueness of Nash equilibrium is proved,and a distributed price adjustment algorithm is proposed to achieve Nash equilibrium;on the price competition of relays with flexible resale bandwidth,a pricing strategy guiding Nash equilibrium is designed,with which the duopoly relays obtain the maximum profits while maintaining their own users in distributed way.