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 Telecommunications 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.
出处
《无线电工程》
2014年第8期5-7,17,共4页
Radio Engineering
基金
中国科大-华为合作基金资助项目(YBWL2011110120)
