一种多流多载波 HetNet 用户归属策略

摘要

异构网（HetNet）是增强小区覆盖、提高小区吞吐量的有效途径。通用移动通信系统（Universal Mobile Tele-communications System， UMTS）引入多流多载波技术作为 HetNet 增强方案，可以进一步提高系统吞吐量。针对多流多载波HetNet 场景下各类型小区负载不均衡的问题，建立了一个多流多载波 HetNet 用户归属联合优化模型，并通过求解该模型给出了具体的算法流程。仿真结果表明，相对于已有的 Bias 方案和软复用方案，所提算法能够在提升用户平均吞吐量的同时，显著提高小区边缘用户吞吐量和用户速率公平性。%HetNet is a promising solution to strengthen cell coverage and increase cell throughput.With the introduction of multi-flow & multi-carrier technique in the UMTS system,the throughput of HetNet has been gearing up.In order to solve load imbalance prob-lem in multi-flow & multi-carrier HetNet scenario,this paper establishes a multi-flow & multi-carrier HetNet user association joint opti-mization model and a specific algorithm is then proposed through solving the optimization model.Simulation results revealed that com-pared to the existing schemes,the proposed algorithm improves user’ s average throughput,boosts the cell edge user throughput and improves user’s rate fairness remarkably.