arXiv 2412.033642024-12-04eess.SP

通过毫米波网络中的双波束接收实现用户移动鲁棒的虚拟现实

User-Movement-Robust Virtual Reality Through Dual-Beam Reception in mmWave Networks

Rizqi Hersyandika, Qing Wang, Yang Miao, Sofie Pollin

AI总结：

针对VR应用中毫米波网络因用户动态移动导致波束失准的问题，提出双波束接收方案，通过多AP协作传输增强连接多样性，可降低中断率最高达17%，提升用户移动鲁棒性。

摘要：

利用毫米波频段有望实现虚拟现实（VR）应用中真实无缝交互所需的高数据速率。为此，接入点（AP）和头戴式显示器（HMD）两侧均需波束成形。该用例的主要挑战是用户特定且高度动态的移动，这会导致波束失准，降低接收信号电平并可能引发中断。本研究针对VR应用研究基于毫米波的协作多点网络，其中两个或多个AP协作向HMD传输信号以实现连接多样性。我们不使用全向接收，而是提出基于HMD模拟波束成形的双波束接收方案，在增强对服务AP的接收波束成形增益的同时实现多样性。使用实际HMD移动数据的评估证明了我们方法的有效性：与使用两个服务AP的准全向接收相比，中断率降低高达13%；与使用一个服务AP的可转向单波束接收相比，中断率降低17%。扩大两个AP之间的分离角度可进一步降低因头部旋转导致的中断率，尽管这会在非中断期间降低接收信号电平。

英文摘要：

Utilizing the mmWave band can potentially achieve the high data rate needed for realistic and seamless interaction within a virtual reality (VR) application. To this end, beamforming in both the access point (AP) and head-mounted display (HMD) sides is necessary. The main challenge in this use case is the specific and highly dynamic user movement, which causes beam misalignment, degrading the received signal level and potentially leading to outages. This study examines mmWave-based coordinated multi-point networks for VR applications, where two or multiple APs cooperatively transmit the signals to an HMD for connectivity diversity. Instead of using omnireception, we propose dual-beam reception based on the analog beamforming at the HMD, enhancing the receive beamforming gain towards serving APs while achieving diversity. Evaluation using actual HMD movement data demonstrates the effectiveness of our approach, showcasing a reduction in outage rates of up to 13% compared to quasi-omnidirectional reception with two serving APs, and a 17% decrease compared to steerable single-beam reception with a serving AP. Widening the separation angle between two APs can further reduce outage rates due to head rotation as rotations can still be tracked using the steerable multi-beam, albeit at the expense of received signal levels reduction during the non-outage period.

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