论文标题
Terahertz可以为无线VR提供高利率可靠的低潜伏期通信吗？
Can Terahertz Provide High-Rate Reliable Low Latency Communications for Wireless VR?
论文作者
论文摘要
无线虚拟现实（VR）施加了新的视觉和触觉要求，这些要求与VR用户的体验质量（QOE）直接相关。这些QOE要求只能通过无线连接性来满足，而无线连接性可提供高利率和高可靠性低潜伏期通信（HRLLC），这与Vanilla Ultra-Collair-Collaile-clip-Rable可靠性低潜伏期通信方案的低利率不同。短距离内VR的高率只能由巨大的带宽支持，该带宽可在Terahertz（THZ）频带中获得。保证HRLLC需要处理特定于THZ渠道的不确定性。为了探索THZ满足HRLLC要求的潜力，通过对端到端（E2E）延迟的尾巴的新颖而严格的特征来量化不可靠VR性能的风险。然后，对尾巴值atrisk（TVAR）进行了彻底的分析，以具体地表征对实时VR体验至关重要的极端无线事件的行为。然后，在推导出新的表达式以获得THZ传输延迟的概率分布函数后，将获得保证线索线（LOS）的方案的系统可靠性作为THZ网络参数的函数。数值结果表明，对于提高可靠性是必要的，大量的带宽和低分子吸收是必要的。但是，与LOS的可用性相比，它们的效果仍然是继发性的，这显着影响了THZ HRLLC性能。特别是，对于保证LOS的场景，可靠性为99.999％（E2E延迟阈值20 ms）的带宽为15 GHz，并且可以通过THZ网络（以1 THZ运行的频率运行的频率为1 TH）实现18.3 Gbps的数据速率，而二十％的可靠性为96％的乘数将Bandwice Blandwices视为blandwicages。
Wireless virtual reality (VR) imposes new visual and haptic requirements that are directly linked to the quality-of-experience (QoE) of VR users. These QoE requirements can only be met by wireless connectivity that offers high-rate and high-reliability low latency communications (HRLLC), unlike the low rates usually considered in vanilla ultra-reliable low latency communication scenarios. The high rates for VR over short distances can only be supported by an enormous bandwidth, which is available in terahertz (THz) frequency bands. Guaranteeing HRLLC requires dealing with the uncertainty that is specific to the THz channel. To explore the potential of THz for meeting HRLLC requirements, a quantification of the risk for an unreliable VR performance is conducted through a novel and rigorous characterization of the tail of the end-to-end (E2E) delay. Then, a thorough analysis of the tail-value-atrisk (TVaR) is performed to concretely characterize the behavior of extreme wireless events crucial to the real-time VR experience. System reliability for scenarios with guaranteed line-of-sight (LoS) is then derived as a function of THz network parameters after deriving a novel expression for the probability distribution function of the THz transmission delay. Numerical results show that abundant bandwidth and low molecular absorption are necessary to improve the reliability. However, their effect remains secondary compared to the availability of LoS, which significantly affects the THz HRLLC performance. In particular, for scenarios with guaranteed LoS, a reliability of 99.999% (with an E2E delay threshold of 20 ms) for a bandwidth of 15 GHz along with data rates of 18.3 Gbps can be achieved by the THz network (operating at a frequency of 1 THz), compared to a reliability of 96% for twice the bandwidth, when blockages are considered.
