TY - GEN
T1 - Wireless-powered cooperative communications via a hybrid relay
AU - Chen, He
AU - Zhou, Xiangyun
AU - Li, Yonghui
AU - Wang, Peng
AU - Vucetic, Branka
N1 - Publisher Copyright:
© 2014 IEEE.
PY - 2014/12/1
Y1 - 2014/12/1
N2 - In this paper, we consider a wireless-powered cooperative communication network, which consists of a hybrid access-point (AP), a hybrid relay, and an information source. In contrast to the conventional cooperative networks, the source in the considered network is assumed to have no embedded energy supply. Thus, it first needs to harvest energy from the signals broadcast by the AP and/or relay, which have constant power supply, in the downlink (DL) before transmitting the information to the AP in the uplink (UL). The hybrid relay can not only help to forward information in the UL but also charge the source with wireless energy transfer in the DL. Considering different possible operations of the hybrid relay, we propose two cooperative protocols for the considered network. We jointly optimize the time and power allocation for DL energy transfer and UL information transmission to maximize the system throughput of the proposed protocols. Numerical results are presented to compare the performance of the proposed protocols and illustrate the impacts of system parameters.
AB - In this paper, we consider a wireless-powered cooperative communication network, which consists of a hybrid access-point (AP), a hybrid relay, and an information source. In contrast to the conventional cooperative networks, the source in the considered network is assumed to have no embedded energy supply. Thus, it first needs to harvest energy from the signals broadcast by the AP and/or relay, which have constant power supply, in the downlink (DL) before transmitting the information to the AP in the uplink (UL). The hybrid relay can not only help to forward information in the UL but also charge the source with wireless energy transfer in the DL. Considering different possible operations of the hybrid relay, we propose two cooperative protocols for the considered network. We jointly optimize the time and power allocation for DL energy transfer and UL information transmission to maximize the system throughput of the proposed protocols. Numerical results are presented to compare the performance of the proposed protocols and illustrate the impacts of system parameters.
KW - RF energy harvesting
KW - Wireless energy transfer
KW - cooperative communications
UR - http://www.scopus.com/inward/record.url?scp=84929330644&partnerID=8YFLogxK
U2 - 10.1109/ITW.2014.6970915
DO - 10.1109/ITW.2014.6970915
M3 - Conference contribution
T3 - 2014 IEEE Information Theory Workshop, ITW 2014
SP - 666
EP - 670
BT - 2014 IEEE Information Theory Workshop, ITW 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE Information Theory Workshop, ITW 2014
Y2 - 2 November 2014 through 5 November 2014
ER -