On the System Performance of Mobile Edge Computing in an Uplink NOMA WSN With a Multiantenna Access Point Over Nakagami-<i>m</i> Fading

doi:10.1109/JAS.2022.105461

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	On the System Performance of Mobile Edge Computing in an Uplink NOMA WSN With a Multiantenna Access Point Over Nakagami-m Fading
	Van-Truong Truong, Van Nhan Vo, Dac-Binh Ha, Chakchai So-In
刊名	IEEE/CAA Journal of Automatica Sinica
	2022
卷号	9 期号:4 页码:668-685
关键词	Mobile edge computing (MEC),Nakagami-m fading,offloading,selection combining (SC)/maximal ratio combining (MRC),successful computation probability (SCP),uplink nonorthogonal multiple access (NOMA),wireless sensor networks (WSNs)
ISSN号	2329-9266
DOI	10.1109/JAS.2022.105461
英文摘要	In this paper, we study the system performance of mobile edge computing (MEC) wireless sensor networks (WSNs) using a multiantenna access point (AP) and two sensor clusters based on uplink nonorthogonal multiple access (NOMA). Due to limited computation and energy resources, the cluster heads (CHs) offload their tasks to a multiantenna AP over Nakagami-m fading. We proposed a combination protocol for NOMA-MEC-WSNs in which the AP selects either selection combining (SC) or maximal ratio combining (MRC) and each cluster selects a CH to participate in the communication process by employing the sensor node (SN) selection. We derive the closed-form exact expressions of the successful computation probability (SCP) to evaluate the system performance with the latency and energy consumption constraints of the considered WSN. Numerical results are provided to gain insight into the system performance in terms of the SCP based on system parameters such as the number of AP antennas, number of SNs in each cluster, task length, working frequency, offloading ratio, and transmit power allocation. Furthermore, to determine the optimal resource parameters, i.e., the offloading ratio, power allocation of the two CHs, and MEC AP resources, we proposed two algorithms to achieve the best system performance. Our approach reveals that the optimal parameters with different schemes significantly improve SCP compared to other similar studies. We use Monte Carlo simulations to confirm the validity of our analysis.
内容类型	期刊论文
源URL	[http://ir.ia.ac.cn/handle/173211/47225]
专题	自动化研究所_学术期刊_IEEE/CAA Journal of Automatica Sinica
推荐引用方式 GB/T 7714	Van-Truong Truong, Van Nhan Vo, Dac-Binh Ha, Chakchai So-In. On the System Performance of Mobile Edge Computing in an Uplink NOMA WSN With a Multiantenna Access Point Over Nakagami-m Fading[J]. IEEE/CAA Journal of Automatica Sinica,2022,9(4):668-685.
APA	Van-Truong Truong, Van Nhan Vo, Dac-Binh Ha, Chakchai So-In.(2022).On the System Performance of Mobile Edge Computing in an Uplink NOMA WSN With a Multiantenna Access Point Over Nakagami-m Fading.IEEE/CAA Journal of Automatica Sinica,9(4),668-685.
MLA	Van-Truong Truong, Van Nhan Vo, Dac-Binh Ha, Chakchai So-In."On the System Performance of Mobile Edge Computing in an Uplink NOMA WSN With a Multiantenna Access Point Over Nakagami-m Fading".IEEE/CAA Journal of Automatica Sinica 9.4(2022):668-685.