用于HetNets的联合基站激活和协调下行链路波束成形：有效的最优和次优算法
Joint Base Station Activation and Coordinated Downlink Beamforming for HetNets: Efficient Optimal and Suboptimal Algorithms
摘要：
在蜂窝异构网络（HetNet）中，多个分布式基站协作地向多个移动用户提供服务。针对HetNet中下行链路传输的联合基站激活和协同波束成形设计问题进行了研究。为此，制定了一个混合整数规划来优化HetNet的总功耗。提出了一种基于Benders分解的新方法，以保证收敛性的方式获得感兴趣问题的最优解。基于我们的新公式，还提出了一个双次梯度算法，在多项式时间内找到一个近似解。所提出的方法可以推广到更一般的设置，包括信道不确定性下的鲁棒波束成形设计，以及用于多小区场景的协调波束成形。
英文摘要：
In cellular heterogeneous networks (HetNets), a number of distributed base stations cooperatively provide services to multiple mobile users. This paper addresses joint base-station activation and coordinated beamforming design for downlink transmission in HetNets. To this end, a mixed integer program is formulated to optimize the total power consumption of a HetNet. A novel approach based on Benders' decomposition is then put forth to obtain the optimal solution for the problem of interest with guaranteed convergence. Building on our new formulation, a dual-subgradient algorithm is also proposed to find an approximate solution in polynomial time. The proposed approaches can be generalized to more general setups, including robust beamforming designs under channel uncertainty, and coordinated beamforming for multi-cell scenarios.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
