Cooperative Bandwidth Sharing for 5G Heterogeneous Network Using Game Theory

In recent years, 4G LTE networks have been deployed by some operators and some of them also sell Femto Cell service in the market. As a kind of Heterogeneous network in cellular communication, lots of work have been published in last few years. However, considered in next generation cellular communication system, some challenging features have been planned like: A super-efficient and fast mobile network. But current system cannot satisfy users and operator. In the next generation wireless communication system, at least three layers of Heterogeneous Networks (HetNets) are required to provide high efficiency bandwidth usage and high speed data throughput. The problem is the users distribution and their quality of service (QoS) request are random, and the number of users may vary through the time. In order to deal with these problems, this paper builds two games models to optimize the resource allocation corresponding to different situations. Analyze the spectrum efficiency and made a comparison between two games. By playing those games, cells can serve more users inside one cell, all users are fair to share the bandwidth according to their request and location. The whole system becomes more flexible and performance has been enhanced.