2019/05/18 by Christina Chaccour, Chaccour, Christina, Ramy Amer +5
Engineering · #Millimeter-Wave Propagation and Modeling #Molecular Communication and Nanonetworks #Terahertz technology and applications
paper · pdf · doi:10.48550/arxiv.1905.07656
Guaranteeing ultra reliable low latency communications (URLLC) with high data\nrates for virtual reality (VR) services is a key challenge to enable a dual VR\nperception: visual and haptic. In this paper, a terahertz (THz) cellular\nnetwork is considered to provide high-rate VR services, thus enabling a\nsuccessful visual perception. For this network, guaranteeing URLLC with high\nrates requires overcoming the uncertainty stemming from the THz channel. To\nthis end, the achievable reliability and latency of VR services over THz links\nare characterized. In particular, a novel expression for the probability\ndistribution function of the transmission delay is derived as a function of the\nsystem parameters. Subsequently, the end-to-end (E2E) delay distribution that\ntakes into account both processing and transmission delay is found and a\ntractable expression of the reliability of the system is derived as a function\nof the THz network parameters such as the molecular absorption loss and noise,\nthe transmitted power, and the distance between the VR user and its respective\nsmall base station (SBS). Numerical results show the effects of various system\nparameters such as the bandwidth and the region of non-negligible interference\non the reliability of the system. In particular, the results show that THz can\ndeliver rates up to 16.4 Gbps and a reliability of 99.999% (with a delay\nthreshold of 30 ms) provided that the impact of the molecular absorption on the\nTHz links, which substantially limits the communication range of the SBS, is\nalleviated by densifying the network accordingly.\n