多波束小基站协作通信的资源分配和位置规划

Resource Allocation and Placement for Cooperative Communication of Multi-beam Small Base Station

针对小基站加载多波束阵列天线后协作提供通信覆盖的资源分配与位置规划问题,建立了以最小化基站总功耗以及基站间负载均衡为目标函数的多目标混合整数非凸优化模型;给出了一种迭代优化算法,将问题分为用户关联、功率分配和位置部署3个子问题,在固定基站位置和波束功率下通过改进的鲸鱼算法求解出用户与波束的关联关系,在此基础上利用连续凸逼近法和改进差分进化算法交替优化功率分配和基站位置部署。数值仿真表明,多波束小基站与所提迭代算法可灵活适应复杂业务需求分布,降低网络功耗和均衡基站间负载。可为小基站加载阵列天线增强通信覆盖提供参考。

To achieve resource allocation and placement for small base station equipped with multi-beam array antennas and cooperating to enhance communication coverage,a multi-objective mixed integer non-convex optimization model is established to minimize the total power consumption and achieve load balance.An iterative optimization algorithm is presented,which divides the problem into three subproblems:user association,power allocation and placement.The association between the users and the base station beams is solved by improved whale algorithm,with fixed location of base station and power allocation,and then power allocation and placement are optimized alternately by successive convex approximation method and improved differential evolution algorithm.Numerical simulation results show that:the multi-beam cooperation mechanism and the proposed iterative optimization algorithm can flexibly adapt to the distribution of complex traffic demands,reduce system power consumption and achieve load balance.This study provides good reference for enhanced communication coverage with small base stations equipped with array antenna.