Distributed Multi-User MIMO and Resource Allocation for Multi Access Point Wi-Fi Systems

为了提供统一的覆盖，完整的Wi-Fi(与所有其他多接入点系统一样)使用多个基本独立的Wi-Fi接入点创建网络，每个接入点服务于覆盖区域重叠的客户端设备的子集。在每个接入点独立地调度资源(子载波和功率)，而不需要任何协调。此外，波束成形和MIMO增益仅限于单个接入点的能力。这种不协调的资源分配和不能执行联合传输导致不必要的干扰和容量损失，从而降低服务质量。随着设备数量的增加，干扰将产生重大影响。这个问题需要得到解决。在高密度环境中提供高质量的互联网连接是未来Wi-Fi系统发展的主要驱动力之一(见IEEE 802.11be/Wi-Fi 7)。因此，本项目提出了多接入点Wi-Fi系统的高效协调技术，以实现最优资源分配和分布式多用户MIMO。这些技术将通过利用我们最近在分布式大规模MIMO方面的工作来开发，但考虑到Wi-Fi和5G系统之间的以下关键差异：a)Wi-Fi AP比5G基站更低的成本点需要更低的复杂性解决方案来实现协调传输，b)住宅用户不愿安装新的布线意味着必须使用接入点之间的无线通信而不是光纤来实现协调。特别是，将探索低复杂性的接入点协调技术，以简单地利用协调的空间重用。此外，还将通过实现接入点之间的协作来研究低复杂度的联合传输技术。尽管提出的低复杂度技术解决了WiFi网络中的挑战，但真正切实的好处远远超出了许多领域。所开发的新技术将对相关研究人员产生重大影响。学术成果将通过备受瞩目的途径传播。学员对英国电信为期3个月的访问将极大地丰富他们的行业经验。建议的技术完全符合EPSRC-ICT的优先事项：未来的智能技术。行业合作者：BT

To provide uniform coverage, Complete Wi-Fi (like all other multi Access Point systems) creates a network using a number of essentially independent Wi-Fi Access Points, each serving a subset of the client devices with overlapping regions of coverage. The resources (subcarriers and power) are independently scheduled at each access point without any coordination. In addition, beamforming and MIMO gains are limited to the capabilities of an individual access point. This non-coordinated resource allocation and inability to perform joint transmission results in unnecessary interference and loss of capacity, degrading the quality of service. As the number of devices increases, the interference will have a significant impact. This needs to be addressed. Providing high quality Internet connections in high-density environments is one of the major drivers for the development of future Wi-Fi systems (see IEEE 802.11be / Wi-Fi 7). Therefore, this project proposes efficient techniques for the co-ordination of multi-access points Wi-Fi systems to enable both optimal resource allocation and distributed multi-user MIMO. These techniques will be developed by leveraging our recent work on distributed massive MIMO, but taking into account the following key differences between Wi-Fi and 5G systems: a) The lower cost point of Wi-Fi APs compared to 5G base stations requires a lower complexity solution for coordinated transmissions, b) Residential users' reluctance to install new wiring means that the co-ordination must be achieved using wireless communications between the access points rather than fibre. In particular, low-complexity access point coordination techniques will be explored to simply exploit coordinated spatial reuse. Additionally, low complexity joint transmission techniques will be investigated by enabling collaboration between access points.Although proposed low-complexity techniques address the challenges in WiFi networks, the real tangible benefits are far reaching across a number of domains. The developed novel techniques will greatly influence relevant researchers. The scholarly results will be disseminated through high profile avenues. The student's 3 one-month visits to BT will enrich their industrial experience significantly. The proposed techniques perfectly align with EPSRC-ICT priorities: Future Intelligent Technologies.Industrial collaborator: BT