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Low latency driven effective capacity analysis for non-orthogonal and orthogonal spectrum access

Yu, Wenjuan, Musavian, Leila, ul Quddus, Atta, Ni, Qiang and Xiao, Pei (2018) Low latency driven effective capacity analysis for non-orthogonal and orthogonal spectrum access In: 2018 IEEE Global Communications Conference (GLOBECOM), 09-13 Dec 2018, Abu Dhabi, UAE.

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Abstract

In this paper, we theoretically investigate the performance of non-orthogonal and orthogonal spectrum access protocols (more generically known as NOMA) in supporting ultra-reliable low-latency communications (URLLC). The theory of effective capacity (EC) is adopted as a suitable delayguaranteed capacity metric to flexibly represent the users’ delay requirements. Then, the total EC difference between a downlink user-paired NOMA network and a downlink orthogonal multiple access (OMA) network is analytically studied. Exact closed-form expressions and the approximated closed-forms at high signal-tonoise ratios (SNRs) are derived for both networks and validated through simulation results. It is shown that for a user pair in which two users with the most distinct channel conditions are paired together, NOMA still achieves higher total EC (compared to OMA) in high SNR regime as the user group size becomes larger, although the EC performance of both NOMA and OMA reduces with the increase in group size. It is expected that the derived analytical framework can serve as a useful reference and practical guideline for designing favourable orthogonal and nonorthogonal spectrum access schemes in supporting low-latency services.

Item Type: Conference or Workshop Item (Conference Paper)
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Yu, Wenjuanw.yu@surrey.ac.uk
Musavian, Leila
ul Quddus, Atta
Ni, Qiang
Xiao, PeiP.Xiao@surrey.ac.uk
Date : 2018
Funders : Engineering and Physical Sciences Research Council (EPSRC)
Copyright Disclaimer : © 2018 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 : URLLC; NOMA; Effective capacity; Delay violation probability; Exact closed-form expressions
Related URLs :
Depositing User : Clive Harris
Date Deposited : 03 Oct 2018 10:31
Last Modified : 11 Dec 2018 11:24
URI: http://epubs.surrey.ac.uk/id/eprint/849513

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