复杂异构超密集小蜂窝网络虚拟频谱交易理论与技术研究

The hyper-dense heterogeneous small cell network has incomparable technical advantages compared to macro cell and is the key technique for the future wireless communication systems. However, small cell will bring in serious interference to the existing macro cell and WLAN as well as benefits. How to fulfill the cell association and interference coordination in the heterogeneous cells, i.e. efficient spectrum sharing, is one of the main bottlenecks to restrict small cell development. Under the network virtualization framework of logically decoupling infrastructure and services, this project will investigate the mechanisms about dynamic cooperative spectrum trading for complex heterogeneous hyper-dense small cell networks with the guidance of evolutionary game analysis, bipartite interference graph theory, and integer programming. It mainly solves the following key challenges by solving the significant growth and uneven need of traffic and services: 1) how should radio spectrum resource be shared in licensed bands so that macro cell user equipments and small cell user equipments are guaranteed a fair and efficient share; 2) how should user equipments of small cells and WLAN dynamic medium access for highest spectrum efficiency in unlicensed bands; 3) how should the heterogeneous small cells balance the spectrum of flexible users through dual-access-scheme in both licensed and unlicensed spectrum bands. The obtained theoretic results and experiment conclusions can be partial theoretical and technical guidance for the integration development, service creation and resource management of future wireless communication networks.

超密集异构小蜂窝网络具有宏蜂窝网络所无法比拟的技术优势，是未来无线通信系统的关键技术。但是，小蜂窝带来好处的同时也会对现有宏蜂窝及局域网带来极大的干扰冲击，如何实现这些复杂异构网络小区间的协同融合及干扰协调，有效地频谱共享，成了制约小蜂窝发展的主要瓶颈之一。基于此场景，本项目将在逻辑分离设备和服务的网络虚拟化框架下，利用进化博弈分析、随机双向干扰图论、整数规划等工具，进行异构超密集小蜂窝网络动态协同频谱交易的理论研究，解决业务激增及分布不均衡带来的系列频谱共享接入问题，主要包括：1)如何实现宏蜂窝和小蜂窝在授权频段各自终端用户间公平高效地协同共享频谱资源；2)小蜂窝和局域网在非授权频段如何协同动态接入才能使频谱效率最优；3)异构小蜂窝如何分层双频段接入实现弹性用户负载频谱均衡。本项目提出的基本理论与实验研究结果将为移动通信网络的融合发展、业务创新及资源管理提供部分理论依据和支撑。

超密集异构小蜂窝网络具有宏蜂窝网络所无法比拟的技术优势，是未来无线通信系统的关键技术。但是，小蜂窝带来好处的同时也会对现有宏蜂窝及局域网带来极大的干扰冲击，如何实现这些复杂异构网络小区间的协同融合及干扰协调，有效地频谱共享，成了制约小蜂窝发展的主要瓶颈之一。基于此场景，本项目主要在逻辑分离设备和服务的网络虚拟化框架下，利用进化博弈分析、随机双向干扰图论、整数规划等工具，进行了异构超密集小蜂窝网络动态协同频谱交易的相关理论研究，解决了业务激增及分布不均衡带来的系列频谱共享接入问题，主要包括：1)实现了宏蜂窝和小蜂窝在授权频段各自终端用户间公平高效地协同共享频谱资源问题，并且还提出了两种异构网络双链接的接入频谱共享策略；2)小蜂窝和局域网在非授权频段协同动态接入使频谱效率最优，我们利用联合博弈等手段，讨价还价的模式，协调两种异构网络之间的共存问题；3)实现了异构小蜂窝分层双频段接入改善弹性用户负载频谱均衡，对各类可利用的频谱资源进一步高效地利用。本项目提出的基本理论与实验研究结果可为移动通信网络的融合发展、业务创新及资源管理提供部分理论依据和支撑。