异构60GHz无线网络中高能效高可靠的协作传输机制研究

随着中继协作传输成为克服60GHz信号传播距离短、易被阻挡等缺陷的有效技术途径，包含固定/移动中继节点的异构60GHz无线网络逐渐成为研究热点。一方面，AP部署较为密集，而用户流量需求是时变的且可能长时间处于较低水平，亟需节能调度机制以提升网络能效，若再考虑中继节点，使得节能调度更为复杂。另一方面，60GHz链路受网络环境的影响显著，亟需链路切换机制以保证网络可靠性，而中继节点的引入，使得链路切换更为困难。为解决异构60GHz无线网络的能效、可靠性等问题，本项目在节能调度、链路切换、移动中继路线规划、移动中继位置优化等方面开展研究，实现AP和中继节点ON/OFF状态的按需调度以及链路阻塞实时感知与低延迟切换，实现移动中继的按需派遣及其位置的自适应调整。最后，开发原型系统并对理论成果进行验证。这些工作将为构建高能效高可靠的异构60GHz无线网络提供技术支撑，具有重要的理论意义和应用价值。

Cooperative transmission based on relays is an effective means to extend the transmission distance of 60 GHz signal and address the blockage issues, and has attracted a lot of attention in the research of heterogeneous 60 GHz wireless networks with fixed relays and mobile relays. Since APs are deployed densely and the user traffic demands are time-variant, the energy-saving scheduling mechanism is urgently needed to improve network energy efficiency, and it will be more complicated while some relays are deployed. Moreover, since 60 GHz links are significantly affected by network environment, the link handover mechanism is urgently needed to ensure network reliability, and it will be more challenging while relays are involved. In order to solve the issues of network energy efficiency and reliability in heterogeneous 60 GHz wireless networks, the project carries out the following four aspects of research, i.e., energy-saving scheduling, link handover, mobile relay route planning and mobile relay position optimization. It aims to achieve the on-demand ON/OFF scheduling of AP/relay nodes, and real-time link blockage sensing and low-latency link handover. Furthermore, the on-demand mobile relay dispatch and self-adaptive mobile relay position adjustment are also achieved. On the basis, we design and implement a corresponding prototype system, and verify the theoretical results in this project. These works provide effective technical support for building energy-efficient and reliable heterogeneous 60 GHz wireless networks, and have important theoretical significance and application value.