Ensuring the Quality-of-Service of Tactile Internet

Tactile internet requires ultra-low latency and ultrahigh reliability, which bring new challenges to the design of mobile systems. In this paper, we study how much resources are required to ensure the short end-to-end (E2E) delay and high reliability by taking a vehicle communication system as an example, where the E2E delay includes both queueing delay and transmission delay, and the reliability is captured by the packet loss and packet error caused by finite blocklength channel codes, queueing delay violation and packets dropping during deep channel fading periods. To this end, we optimize the bandwidth allocation among multiple users to minimize the average transmit power required to ensure the queueing delay and its violation probability of each packet, and analyze the maximal transmit power required to guarantee the E2E delay and the reliability. Simulation and numerical results validate our analysis and show the required maximal transmit power, bandwidth, and number of antennas to ensure the extremely stringent quality of service.

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