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Opportunistic Spectrum Sharing for D2D-Based URLLC

Chu, Zheng, Yu, Wenjuan, Xiao, Pei, Zhou, Fuhui, Al-Dhahir, Naofal, ul Quddus, Atta and Tafazolli, Rahim (2019) Opportunistic Spectrum Sharing for D2D-Based URLLC IEEE Transactions on Vehicular Technology.

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Abstract

A device-to-device (D2D) ultra reliable low latency communications (URLLC) network is investigated in this paper. Specifically, a D2D transmitter opportunistically accesses the radio resource provided by a cellular network and directly transmits short packets to its destination. A novel performance metric is adopted for finite block-length code. We quantify the maximum achievable rate for the D2D network, subject to a probabilistic interference power constraint based on imperfect channel state information (CSI). First, we perform a convexity analysis which reveals that the finite block-length rate for the D2D pair in short-packet transmission is not always concave. To address this issue, we propose two effective resource allocation schemes using the successive convex approximation (SCA)-based iterative algorithm. To gain more insights, we exploit the mono- tonicity of the average finite block-length rate. By capitalizing on this property, an optimal power control policy is proposed, followed by closed-form expressions and approximations for the optimal average power and the maximum achievable average rate in the finite block-length regime. Numerical results are provided to confirm the effectiveness of the proposed resource allocation schemes and validate the accuracy of the derived theoretical results.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Chu, Zhengzheng.chu@surrey.ac.uk
Yu, Wenjuanw.yu@surrey.ac.uk
Xiao, PeiP.Xiao@surrey.ac.uk
Zhou, Fuhui
Al-Dhahir, Naofal
ul Quddus, AttaA.Quddus@surrey.ac.uk
Tafazolli, RahimR.Tafazolli@surrey.ac.uk
Date : 29 July 2019
DOI : 10.1109/TVT.2019.2931625
Copyright Disclaimer : © 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords : Finite block-length codes; URLLC; Average achievable rate; Performance analysis; Optimal power allocation; Device-to-device communication; Reliability; Measurement; Cellular networks; 5G mobile communication; Computer network reliability; Resource management
Depositing User : Clive Harris
Date Deposited : 30 Aug 2019 07:49
Last Modified : 30 Aug 2019 07:49
URI: http://epubs.surrey.ac.uk/id/eprint/852507

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