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"A Novel Hybrid Access Point Channel Access Method for Wireless Powered" by Xiaoyu Song and Kwan Wu Chin

Abstract
This paper considers data collection in a wireless powered Internet of Things (IoT) network. Specifically, it addresses the novel problem of determining the mode of each time slot, where a Hybrid Access Point (HAP) needs to decide whether to charge or collect data from devices. Also, in data time slots, the HAP has to decide on a device for data transmission. To this end, we outline an Integer Linear Program (ILP) to determine the mode and the transmitting device over a given planning time horizon. We also propose a rolling horizon approach that uses a Gaussian Mixture Model (GMM) to estimate channel gains. Our results indicate that the amount of data collected by the HAP is affected by its charging power, distance between the HAP and each device, number of devices and planning horizon length. The rolling horizon approach allows the HAP to collect 740% more data as compared to competing approaches. ....

Integer Linear Program , Hybrid Access Point , Gaussian Mixture Model , முழு நேரியல் ப்ரோக்ர்யாம் , கலப்பு நுழைவு பாயஂட் ,

"On Maximizing Min Source Rate in Power Beacon Assisted IoTs Networks" by Tengjiao He, Kwan-Wu Chin et al.

Publication Details
T. He, K. Chin, S. Soh, C. Yang & J. Wen, On Maximizing Min Source Rate in Power Beacon Assisted IoTs Networks, IEEE Transactions on Vehicular Technology, vol. 69, (10) pp. 11880-11892, 2020.
Abstract
© 1967-2012 IEEE. Future Internet of Things (IoTs) networks will have Radio Frequency (RF)-energy harvesting devices powered by a Power Beacon (PB). These devices will be tasked with collection and transmission of data over multiple hops to a fusion center. In this paper, our aim is to maximize the minimum data gathering rate of devices acting as sources. We formulate a Mixed Integer Linear Program (MILP) to compute the optimal max-min rate of sources by deciding for each slot the devices to be charged, a PB s transmission power, the amount of data routed over each link, and the active time of transmitting links. We also present a novel distributed protocol called Distributed Charging and Fairness Gathering (D-CFG) that is used by IoT devices to req ....

Integer Linear Program , Radio Frequency , Power Beacon , Mixed Integer Linear Program , Distributed Charging , Fairness Gathering , முழு நேரியல் ப்ரோக்ர்யாம் , வானொலி அதிர்வெண் , பவர் பெக்கான் , கலப்பு முழு நேரியல் ப்ரோக்ர்யாம் , விநியோகிக்கப்பட்டது கட்டணம் வசூலிக்கிறது , நேர்மை சேகரித்தல் ,