Channel Access and Power Control for Mobile Crowdsourcing in Device‐to‐Device Underlaid Cellular Networks

Ma, Yue; Zhou, Li; Gu, Zhaoquan; Song, Yang; Wang, Bin

doi:10.1155/2018/7192840

Cited by 3 publications

(6 citation statements)

References 17 publications

(33 reference statements)

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“…As the other important performance metric of spectrum utilization efficiency, ASE is defined as the average rate of successful transmissions message per unit bandwidth per unit area (bps/Hz/m 2 ) [24], [25]. Therefore, the ASE η is given by…”

Section: B Performance Metricsmentioning

confidence: 99%

“…where W (•) denotes the Lambert-W function [25], [33], which defined as the inverse function of f (x) = xe x . Therefore, the optimal access probability p opt s,η for scheme S2 is given by…”

Section: B Scheme S2mentioning

confidence: 99%

“…In [24], the authors maximized the area spectral efficiency (ASE) of D2D links by setting a appropriate access threshold for each D2D link, where the ASE of cellular link was neglected. In [25], a channel access scheme was proposed for controlling the interference from D2D pairs to cellular users under the perfect CSI, where the Pareto optimal access threshold was obtained for maximizing the total ASE. However, the existed works considered only a perfect knowledge of CSI.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, we obtain an optimized access threshold with imperfect CSI that aims to maximize the total ASE while satisfying the required secrecy performance of the offloading link. Unlike the existed works [24], [25], the total ASE of the D2D-V links and the offloading link is considered in acquiring the optimal solution of the access threshold at the same time. Furthermore, the optimized access threshold keeps a desired balance in the spectral efficiency trade-off between the offloading link and the D2D-V links.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Optimal Access Scheme for Security Provisioning of C-V2X Computation Offloading Network With Imperfect CSI

et al. 2020

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In a cellular vehicle-to-everything (C-V2X) enabled computation-offloading network, vehicular users may deliver computation tasks to a cellular base station (BS) through vehicle-to-infrastructure (V2I) transmission links in order to accommodate computation-intensive applications, where the BS is usually equipped with a mobile edge computing (MEC) server. However, due to the broadcast nature of wireless communications and high-mobility of vehicles, the computation-offloading information may suffer from an eavesdropping threat. In practice, the interference generated by device-to-device-based V2V (D2D-V) links can be utilized for protecting the offloading information against eavesdropping. This observation motivates a security provisioning for C-V2X computation-offloading network. Specifically, a dynamic thresholdbased access scheme is required to maintain the interference under control for different channel conditions. Unfortunately, the previous studies that are based on the assumption of perfect channel state information (CSI) can not be applied for the dynamic vehicular networks. In this paper, we propose a dynamic thresholdbased access scheme for security provisioning of C-V2X computation-offloading network by considering an imperfect CSI. In this scheme, an optimized access threshold is set to update adaptively in terms of channel estimation error for balancing both the security and reliability of the offloading link. Furthermore, the proposed scheme can maximize the secrecy throughput under a connection outage constraint of the D2D-V links, with the total area spectral efficiency optimized under the security performance criterion for the offloading link. Numerical results are provided for validating the proposed theoretical analysis. A useful design insight is provided for attaining an optimal configuration of C-V2X computation-offloading network. INDEX TERMS Cellular V2X communication, mobile edge computing, physical-layer security, secrecy throughput, imperfect channel state information, access threshold.

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Section: B Performance Metricsmentioning

confidence: 99%

Section: B Scheme S2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Optimal Access Scheme for Security Provisioning of C-V2X Computation Offloading Network With Imperfect CSI

et al. 2020

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“…It is worth noting that each of these communication standards is characterized by different energy consumption and data transfer parameters [8]. Smartphone devices possess powerful computational capabilities and are equipped with various functional built-in sensors [9] that have enabled the development of mobile sensing technologies [10][11][12][13][14].…”

Section: Related Work and Contributionmentioning

confidence: 99%

Road Traffic Monitoring System Based on Mobile Devices and Bluetooth Low Energy Beacons

Lewandowski

Płaczek

Bernaś

et al. 2018

Wireless Communications and Mobile Computing

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The paper proposes a method, which utilizes mobile devices (smartphones) and Bluetooth beacons, to detect passing vehicles and recognize their classes. The traffic monitoring tasks are performed by analyzing strength of radio signal received by mobile devices from beacons that are placed on opposite sides of a road. This approach is suitable for crowd sourcing applications aimed at reducing travel time, congestion, and emissions. Advantages of the introduced method were demonstrated during experimental evaluation in real-traffic conditions. Results of the experimental evaluation confirm that the proposed solution is effective in detecting three classes of vehicles (personal cars, semitrucks, and trucks). Extensive experiments were conducted to test different classification approaches and data aggregation methods. In comparison with state-of-the-art RSSI-based vehicle detection methods, higher accuracy was achieved by introducing a dedicated ensemble of random forest classifiers with majority voting.

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Spectrum Gap Analysis With Practical Solutions for Future Mobile Data Traffic Growth in Malaysia

et al. 2019

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In this paper, an efficient spectrum forecasting model is developed to estimate the required spectrum and calculate the spectrum gap in future. This developed model is essentially based on five main metrics and one constant. The five main metrics are the currently available spectrum, sites number growth, data traffic growth, average network utilization, and spectrum efficiency growth. The constant metric is considered to give a space for our model to be used in another country or when a new technology is coming. This developed model is then used to forecast the required spectrum and spectrum gap for Malaysia in 2020. The estimation is performed based on the input market data of four main mobile telecommunication operators in Malaysia: Maxis, Celcom, Digi, and U-Mobile. The input data for this model are collected from various sources, such as the Malaysian Communications and Multimedia Commission, OpenSignal, Analysys Mason, GSMA, and HUAWEI. The results indicate that by 2020, Malaysia will require around 307 MHz of additional spectrum to fulfill the enormous increase of mobile data demands. Addressing this increment can be achieved by launching additional spectrum bands, enhancing spectrum efficiency, offloading mobile data to unlicensed bands or deploying more site numbers. INDEX TERMS Mathematical forecasting spectrum model, forecasting required spectrum, spectrum gap, Malaysia's spectrum in future.

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Channel Access and Power Control for Mobile Crowdsourcing in Device‐to‐Device Underlaid Cellular Networks

Cited by 3 publications

References 17 publications

Optimal Access Scheme for Security Provisioning of C-V2X Computation Offloading Network With Imperfect CSI

Optimal Access Scheme for Security Provisioning of C-V2X Computation Offloading Network With Imperfect CSI

Road Traffic Monitoring System Based on Mobile Devices and Bluetooth Low Energy Beacons

Spectrum Gap Analysis With Practical Solutions for Future Mobile Data Traffic Growth in Malaysia

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