Radio resource management for spectrum and energy efficient design of 5G networks

发展中的第五代(5G)蜂窝无线网络旨在克服现有蜂窝网络的根本挑战，包括目前正在全球部署的第四代(4G)蜂窝网络。预计5G技术将使单位面积的移动数据量增加1000倍，连接设备数量和用户数据速率增加10-100倍，电池续航时间延长10倍，延迟减少5倍。5G无线网络预计将是不同规模、传输功率、回程连接和不同无线电接入技术(RAT)的网络层的混合体，可由前所未有数量的智能和异类无线设备访问。与4G网络相比，这种架构增强与高级物理通信技术(如高阶空间多路复用多输入多输出(MIMO)通信)一起将为更多并发用户提供更高的聚合容量或更高水平的频谱效率。无线资源和干扰管理将是多层和异质5G蜂窝网络中的关键研究挑战。在单层网络(甚至是为双层网络开发的一些方法)中用于无线电资源和干扰管理(例如，信道分配、功率控制、小区关联或负载平衡)的传统方法在该环境中可能不是有效的，并且将需要重新审视无线电资源管理(RRM)问题。在此背景下，在我们这个项目的产业合作伙伴TELUS的支持下，我们将开发和研究适用于5G网络的频谱和节能RRM方法。具体地说，该项目将重点开发(I)用于高效干扰管理的小区关联和功率控制方法，(Ii)用于频谱和节能多点传输的跨层协作，(Iii)用于基站休眠和小区缩放的节能方法，以及(Iv)用于在多层5G网络中自适应能量收集的方法。这些将是5G蜂窝系统的关键推动因素，因此，将对塑造未来的宽带无线产业产生重大影响。

The evolving fifth generation (5G) cellular wireless networks are envisioned to overcome the fundamental challenges of existing cellular networks including the fourth generation (4G) cellular networks which are currently being deployed worldwide. The 5G technologies are expected to serve 1000 times higher mobile data volume per unit area, 10-100 times higher number of connecting devices and user data rate, 10 times longer battery life and 5 times reduced latency. 5G wireless networks are expected to be a mixture of network tiers of different sizes, transmit powers, backhaul connections, and different radio access technologies (RATs) that are accessed by an unprecedented numbers of smart and heterogeneous wireless devices. This architectural enhancement along with the advanced physical communications technology such as high-order spatial multiplexing multiple-input multiple-output (MIMO) communications will provide higher aggregate capacity for more simultaneous users or higher level of spectral efficiency, when compared to the 4G networks. Radio resource and interference management will be a key research challenge in multi-tier and heterogeneous 5G cellular networks. The traditional methods for radio resource and interference management (e.g., channel allocation, power control, cell association or load balancing) in single-tier networks (even some of those developed for two-tier networks) may not be efficient in this environment and a new look into the radio resource management (RRM) problem will be required. In this context, with support from TELUS, our industrial partner for this project, we will develop and study spectrum and energy efficient RRM methods for 5G networks. Specifically, the project will focus on developing (i) cell association and power control methods for efficient interference management, (ii) cross-tier cooperation for spectrum and energy-efficient multipoint transmission, (iii) energy efficient methods for base station sleeping and cell zooming, and (iv) methods for adaptive energy harvesting in multi-tier 5G networks. These will be key enablers for 5G cellular systems, and therefore, will have significant impact on shaping up the broadband wireless industry in the future.