WiFED Mobile: WiFi Friendly Energy Delivery with Mobile Distributed Beamforming

Subhramoy Mohanti*, Elif Bozkaya, M. Yousof Naderi, Berk Canberk, Gokhan Secinti, Kaushik R. Chowdhury

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Wireless RF energy transfer for indoor sensors is an emerging paradigm ensuring continuous operation without battery limitations. However, high power radiation within ISM band interferes with packet reception for existing WiFi devices. The paper proposes the first effort in merging RF energy transfer within a standards compliant 802.11 protocol, realizing practical and WiFi-friendly Energy Delivery with Mobile Transmitters (WiFED Mobile). WiFED Mobile architecture is composed of a centralized controller coordinating the actions of multiple energy transmitters (ETs), and deployed sensors that periodically requires charging. The paper first describes 802.11 supported protocol features that can be exploited by sensors to request energy and for ETs to participate in energy transfer. Second, it devises a controller-driven bipartite matching algorithm, assigning appropriate number of ETs to sensors for efficient energy delivery. Thirdly, it detects outlier sensors (OS), which have limited power reception from static ETs and utilizes mobile ETs (METs) to satisfy their charging cycles. The proposed in-band and protocol supported coexistence in WiFED Mobile is validated via simulations and partly in a software defined radio testbed, showing that METs reduce latency by 42% and improve throughput by 83% in scenarios where using only static ETs fails to satisfy charging cycles of OS.

Original languageEnglish
Article number9367010
Pages (from-to)1362-1375
Number of pages14
JournalIEEE/ACM Transactions on Networking
Issue number3
Publication statusPublished - Jun 2021

Bibliographical note

Publisher Copyright:
© 1993-2012 IEEE.


Manuscript received April 29, 2020; revised December 11, 2020; accepted February 17, 2021; approved by IEEE/ACM TRANSACTIONS ON NETWORKING Editor G. Zussman. Date of publication March 2, 2021; date of current version June 16, 2021. This work was supported by the U.S. National Science Foundation under Grant CNS-1452628. (Corresponding author: Subhramoy Mohanti.) Subhramoy Mohanti, M. Yousof Naderi, and Kaushik R. Chowdhury are with the Department of Electrical and Computer Engineering, Northeastern University, Boston, MA 02115 USA (e-mail: smohanti@coe.neu.edu; naderi@coe.neu.edu; krc@coe.neu.edu).

FundersFunder number
National Science FoundationCNS-1452628


    • distributed beamforming
    • quality of service
    • resource allocation
    • software defined radio
    • Wireless energy transfer


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