Performance analysis of cooperative NOMA based intelligent mobile edge computing system

Dong, Xiequn, Li, Xuehua, Yue, Xinwei, and Xiang, Wei (2020) Performance analysis of cooperative NOMA based intelligent mobile edge computing system. China Communications, 17 (8). 9190129. pp. 45-57.

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Abstract

In this manuscript, a cooperative non-orthogonal multiple access based intelligent mobile edge computing (NOMA-MEC) communication system is constructed in detail. The nearby user is viewed as a decoding and forwarding relay, which can assist a distant user in offloading tasks to the intelligent MEC server. Then, the closed-form expressions of offloading outage probability for a pair of users are derived in detail to evaluate the performance of the cooperative NOMA-MEC system. Furthermore, the approximate expressions of offloading outage probability are provided in the high signal-to-noise ratio region. Based on the asymptotic analyses, the diversity order of distant user and nearby user is n+m+1 and n+1, respectively. The system throughput and energy efficiency of cooperative NOMA-MEC are analyzed in delay-limited transmission mode. Numerical results show that 1) Cooperative NOMA-MEC is better than orthogonal multiple access (OMA) in terms of offload performance; 2) The offload performance of cooperative NOMA-MEC system improves as the number of transmission task decreases; and 3) Cooperative NOMA-MEC performs better than OMA in energy efficiency.

Item ID: 64442
Item Type: Article (Research - C1)
ISSN: 1673-5447
Keywords: cooperative communication, mobile edge computing, non-orthogonal multiple access, offloading outage probability
Copyright Information: Restrictions apply.
Funders: National Science Foundation of Beijing Municipality (NSF), Science and Technology Project of Beijing Municipal Education Commission (STP)
Projects and Grants: NSF Grant 4204099, NSF Grant 19L2022, NSF Grant L182032, NSF Grant L182039, NSF Grant KZ201911232046, STP Grant KM202011232002, STP Grant KM202011232003
Date Deposited: 16 Sep 2020 07:46
FoR Codes: 46 INFORMATION AND COMPUTING SCIENCES > 4606 Distributed computing and systems software > 460608 Mobile computing @ 100%
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