Threshold-based transmissions for large relay networks powered by renewable energy

Chuan Huang, Junshan Zhang, Ping Zhang, Shuguang Cui

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

This paper considers the use of energy harvesters for cooperative relaying in a large relay network, which consists of N energy-harvesting (EH) relays and one source-destination pair. In particular, a threshold-based 'save-then-transmit' scheme is employed at the relays, where each relay transmits only when both the backward and forward link channel coefficients are above certain thresholds. We assume that the time scale of EH is much larger than that of communication blocks. For general channel fading models, we derive the asymptotic average throughput for the case with many relays, by using the amplify-and-forward (AF) relaying scheme. The throughput maximization is cast as a joint optimization problem over the transmission thresholds corresponding to all possible harvested energy rate states, which is shown to be non-convex in general. By applying a convexification technique via randomization, the original problem is transformed into a new formulation with a generalized threshold-based transmission scheme, which is shown to be efficiently solvable by bisection search, with the help of an offline look-up table only related to the channel statistics. Finally, with some numerical experiments, we demonstrate the performance gain of the proposed threshold-based transmission scheme against some suboptimal ones.

Original languageEnglish (US)
Title of host publicationGLOBECOM - IEEE Global Telecommunications Conference
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1921-1926
Number of pages6
ISBN (Print)9781479913534
DOIs
StatePublished - 2013
Event2013 IEEE Global Communications Conference, GLOBECOM 2013 - Atlanta, GA, United States
Duration: Dec 9 2013Dec 13 2013

Other

Other2013 IEEE Global Communications Conference, GLOBECOM 2013
CountryUnited States
CityAtlanta, GA
Period12/9/1312/13/13

Fingerprint

Energy harvesting
Throughput
Harvesters
Fading channels
Statistics
Communication
Experiments

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Huang, C., Zhang, J., Zhang, P., & Cui, S. (2013). Threshold-based transmissions for large relay networks powered by renewable energy. In GLOBECOM - IEEE Global Telecommunications Conference (pp. 1921-1926). [6831355] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/GLOCOM.2013.6831355

Threshold-based transmissions for large relay networks powered by renewable energy. / Huang, Chuan; Zhang, Junshan; Zhang, Ping; Cui, Shuguang.

GLOBECOM - IEEE Global Telecommunications Conference. Institute of Electrical and Electronics Engineers Inc., 2013. p. 1921-1926 6831355.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Huang, C, Zhang, J, Zhang, P & Cui, S 2013, Threshold-based transmissions for large relay networks powered by renewable energy. in GLOBECOM - IEEE Global Telecommunications Conference., 6831355, Institute of Electrical and Electronics Engineers Inc., pp. 1921-1926, 2013 IEEE Global Communications Conference, GLOBECOM 2013, Atlanta, GA, United States, 12/9/13. https://doi.org/10.1109/GLOCOM.2013.6831355
Huang C, Zhang J, Zhang P, Cui S. Threshold-based transmissions for large relay networks powered by renewable energy. In GLOBECOM - IEEE Global Telecommunications Conference. Institute of Electrical and Electronics Engineers Inc. 2013. p. 1921-1926. 6831355 https://doi.org/10.1109/GLOCOM.2013.6831355
Huang, Chuan ; Zhang, Junshan ; Zhang, Ping ; Cui, Shuguang. / Threshold-based transmissions for large relay networks powered by renewable energy. GLOBECOM - IEEE Global Telecommunications Conference. Institute of Electrical and Electronics Engineers Inc., 2013. pp. 1921-1926
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