超密集网络中基于多连接的用户归属和功率控制联合优化

Joint user-association and power-control algorithm based on multiple association in ultra-dense network

超密集网络是第五代移动通信系统提升容量的关键技术之一。针对基站密集部署场景,考虑用户基于多连接用户归属方式接入多个基站,以充分利用基站资源。为进一步提高用户吞吐量,研究多连接场景下的用户归属与功率控制策略。从兼顾系统吞吐量与用户公平性角度出发,将问题建模成对数速率最大化问题。通过将优化问题分解为用户归属和功率控制两个子问题,得出一种高效的次优解法。仿真结果表明所提算法在系统吞吐量上较已有算法具有明显的增益.

Ultra-dense network is one of the key technologies to improve the capacity of the fifth generation mobile communication system.In this work,we assume that one user can connect to multiple base stations to make full use of the stations.In order to further improve the throughput of the system using more base stations,we study user-association and power-control in the multiple association condition.To consider the network throughput and the equality of users,we model this problem as a problem of maximizing the logarithm of user rate.Since this problem is difficult to solve,we divide this problem into two subproblems,which can be solved efficiently.Simulation results reveal that the proposed algorithm is better than the existing algorithms in system performance.