超密集分层异构网络能效增强研究

项目名称： 超密集分层异构网络能效增强研究

项目编号： No.61501289

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 无线电电子学、电信技术

项目作者： 孙彦赞

作者单位： 上海大学

项目金额： 20万元

中文摘要： 为应对5G蜂窝网络1000倍网络数据容量增长挑战，由宏蜂窝与超密集部署小基站混合同频组网的超密集分层异构网络，可极大幅度的提升蜂窝网络容量，成为5G的关键候选技术。然而超密集部署小基站会带来网络能耗增加和更加复杂的网络层间和层内干扰，造成网络能效的显著下降。当前针对分层异构网络节能的研究主要关注于小基站的稀疏部署场景，不能有效应对小基站超密集部署带来的新挑战。为此，本项目将基于泊松点过程对网络架构建模，从基站自适应睡眠/唤醒机制，网络层间和层内干扰的联合抑制方法，能量效率和频谱效率联合优化的时频资源分配设计三个层次上开展研究。并对联合长时间业务负载变化统计规律和短时间业务动态变化的基站睡眠及唤醒周期的优化，层间及层内干扰基站间基于时域干扰协调的几乎空子帧模式配置，基于不同子帧类型的能量效率和频谱效率折中准则设计等关键科学问题进行重点攻关，为未来5G绿色蜂窝通信提供有力的解决方案。

中文关键词： 分层异构；干扰协调；能效；网络选择；资源管理

英文摘要： To tackle the 1000× mobile data challenge, one clear enabler is Ultra-dense Heterogeneous Networks (HetNets) deployed with a mix of traditional macrocells and Low Power Nodes (LPNs) such as pico, femto, and/or relay nodes. However, ultra-dense deployments of LPNs in HetNets will cause issues of network energy consumption increase and more complex inter-tier and intra-tier interference，which will severely deteriorate the network energy efficiency (EE) obviously. The current studies for HetNets EE enhancement mainly focus on the network scenario with LPNs sparse deployment, which cannot tackle the new challenges caused by LPNs ultra-dense deployment. To solve these troubles, we will adopt Poison Point Process (PPP) to model the network scenario, then we will conduct research in three levels: the Base Station (BS) sleep/awake metric, the inter-tier and intra-tier interference suppression, and the trade-off between EE and spectrum efficiency (SE). We will firstly propose BS adaptive sleep/awake period optimization algorithm based on the combination analysis of large scale time statistics of cell load fluctuation and small scale time of cell load dynamic change. Next, based on time domain interference coordination, we will discuss the Almost Blank Subframe (ABS) pattern configuration strategies for interference repression among adjacent BSs. Finally, the trade-off between EE and SE will be investigated based on time-frequency resource allocation on different kinds of subframes.

英文关键词： Heterogeneous Networks;Interference Coordination;Energy Efficiency;Network Association;Resource Management