1. Green Wireless Power Transfer Networks
- Author
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Qingzhi Liu, Przemyslaw Pawelczak, Michal Golinnski, and Martijn Warnier
- Subjects
FOS: Computer and information sciences ,Computer Networks and Communications ,Computer science ,Energy management ,02 engineering and technology ,Energy conservation ,Energy on demands ,Computer Science - Networking and Internet Architecture ,Idle ,2015 Human & Operational Modelling ,Radio frequency radiation ,Inductive power transmission ,0202 electrical engineering, electronic engineering, information engineering ,NO - Networked Organisations ,Wireless power transfer ,Electrical and Electronic Engineering ,Next generation networking ,Networking and Internet Architecture (cs.NI) ,Reduced energy ,business.industry ,020208 electrical & electronic engineering ,Transmitter ,Electrical engineering ,020206 networking & telecommunications ,Control planes ,Electric rectifiers ,Transmitters ,Power (physics) ,Next generation networks ,Support devices ,ELSS - Earth, Life and Social Sciences ,Green wireless ,Telecommunications ,business ,Energy (signal processing) - Abstract
A Wireless Power Transfer Network (WPTN) aims to support devices with cable-less energy on-demand. Unfortunately, wireless power transfer itself-especially through radio frequency radiation rectification-is fairly inefficient due to decaying power with distance, antenna polarization, etc. Consequently, idle charging needs to be minimized to reduce already large costs of providing energy to the receivers and at the same time reduce the carbon footprint of WPTNs. In turn, energy saving in a WPTN can be boosted by simply switching off the energy transmitter when the received energy is too weak for rectification. Therefore in this paper we propose, and experimentally evaluate, two "green" protocols for the control plane of static charger/mobile receiver WPTN aimed at optimizing the charger workflow to make WPTN green. Those protocols are: 'beaconing', where receivers advertise their presence to WPTN, and 'probing' exploiting the receiver feedback from WTPN on the level of received energy. We demonstrate that both protocols reduce the unnecessary WTPN uptime, however trading it for the reduced energy provision, compared to the base case of 'WPTN charger always on'. For example, our system (in our experiments) saves at most approx. 80% of energy and increases 5.5 times the efficiency with only approx. 17% less energy possibly harvested., Comment: submitted for possible publication. http://www.es.ewi.tudelft.nl/reports/ES-2015-01.pdf
- Published
- 2016
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