Abstract
As a promising technique, power beacon provides ability of wireless energy transfer to relaying devices in Internet of Things (IoT) to serve far devices with respect to low latency and high spectrum efficiency manner. Mobile edge computing (MEC) enables smart devices to offload parts of their computation-workloads to the cellular base stations associated with edge servers. This paper introduces a promising multiple access technique, namely non-orthogonal multiple access (NOMA) to provide communication service between the base station associated with MEC and far IoT devices. In this paper, we indicate that the multiple power beacons (PBs) benefits to uplink of NOMA-MEC system with the wireless powered IoT. More antennas equipped at smart device and more PBs exhibit reasonable outage performance for the considered system. The simulation results reveal in two folds: (1) our proposed scheme can simultaneously achieve higher spectrum efficiency and ensure prolong lifetime of IoT devices; (2) the mobility of relay leads to select PB appropriately and hence the suitable scheme is realized as comparing two schemes related to ability of energy harvesting and acceptable outage behavior.
Highlights
D UE to capability of connecting heterogeneous devices, the Internet of Things (IoT) has attracted increased attention [1]
Remark 4: These results indicate that outage probability of non-orthogonal multiple access (NOMA)-mobile edge computing (MEC) which depends on various parameters
We proposed a uplink for NOMA-enabled MEC system operating under ability of energy harvesting from the group of power beacons (PBs)
Summary
D UE to capability of connecting heterogeneous devices, the IoT has attracted increased attention [1]. A. RELATED WORK Regarding implementing wireless power transfer to green networks, the base station provides energy to devices and support to transmit information for uplink communication by using NOMA as recent work [17], [18]. The machineto-machine communication benefits from wireless power transfer technique and NOMA scheme In such network, the machine-type communication device is able to harvest energy in the downlink while the uplink transmitting information to the base station via machine-type communication gateway as in [22], [23]. Different from the traditional NOMA network, beacon-assisted NOMA-MEC can achieve low outage probability compared with orthogonal multiple access (OMA) This proposed system can achieve the best trade-off between information and lifetime for energy-limited wireless networks. Notation: Throughout this paper, Pr (.) denotes probability, FZ (.) and fZ (.) symbolize the cumulative distribution function (CDF) and the probability density function (PDF) of a random variable Z, respectively, and K1 {.} is the first order modified Bessel function of the second kind
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