面向容量增强的分层异构网络资源配置与协同优化

Heterogeneous cellular networks have been expected to be the most hopeful solution to provide wideband, highspeed and huge capacity wireless access in the future for it's seamless coverage, flexible deployment and energy efficiency advantages. However, because of the different distribution density, coverage area and serving capability of different tiers, the new network deployment cause more complexed and variable communication environments. There are many key problems have to be solved for overall throughput improvingh. We intend to investigate the resource allocation and coordinative optimizationproblems in the heterogeneous cellular networks with the goals to enhance the system throughput. We separate the resource allocation problem into several sub-problems which are relatively independent and associated with each other. In this work, the self-organizing subcarrier allocation scheme, the evolution game based cell association algorithm and the cell zooming method based on the multi-cell cooperative optimization model are studied and proposed. Thus the network capacity will be highly improved, the load traffic will be ballanced and the efficiency of spectrum and energy will be increased. Therefore, we could provide the theoretical basis for the higher access speed, more reliable operation and more effective management of the future communication networks.

分层异构网络被认为是解决宽带、高速、大容量无线接入最具前景的备选方案，具有覆盖全面、布网灵活、绿色节能等优点。然而，由于其中小区层次较多，在分布密度、覆盖范围、服务能力等方面差异较大，彼此重叠覆盖，相互影响，形成了复杂时变的通信环境，要实现网络容量的显著提升，还有一些新的技术问题亟待解决。本课题拟针对分层异构网络中的资源配置与协同优化展开研究，围绕增强网络容量的核心目标，将复杂通信环境中的资源优化分配分解为相对独立又彼此关联的若干问题，实现基于干扰抑制的子载波预测及自组织配置，引入进化博弈论设计分层小区智能附着机制，通过建立并求解多小区动态协同优化模型研究蜂窝变焦策略，从而显著提高网络吞吐量，实现负载均衡，改善频谱效率和能量效率，为分层异构网络实现更高速的接入、更可靠的运行和更科学的管理提供理论依据。

分层异构网络具有覆盖面广、布网灵活、易于扩展、能耗低、成本低等优点，是解决宽带、高速、大容量无线接入最具前景的网络架构。然而，由于异构网络中小区层次较多，各层小区在分布密度、覆盖范围、服务能力以及处理能力等方面差异较大，因此存在干扰环境复杂、接入选择多样、小区间负载不均衡等问题。本课题的研究重点是：针对上述问题，围绕增强网络容量的核心目标，将复杂通信环境中的资源优化分配分解为相对独立又彼此关联的若干问题，分别提出子载波预测及自组织配置算法、分层小区附着机制以及蜂窝变焦策略，从而显著提高网络吞吐量，均衡网络负载，并改善其频谱效率和能量效率。研究成果为分层异构网络实现更高速的接入、更可靠的运行和更科学的管理提供理论依据。