Charge-Then-Forward: Wireless-Powered Communication for Multiuser Relay Networks
作者： Mengyu Liu , Yuan Liu
DOI: 10.1109/TCOMM.2018.2850824
关键词: Frequency-division multiple access 、 Convex optimization 、 Node (networking) 、 Transmitter 、 Optimization problem 、 Transmission (telecommunications) 、 Computer science 、 Wireless 、 Relay 、 Mathematical optimization 、 Time division multiple access
摘要: This paper studies a relay-assisted wireless-powered communication network consisting of multiple source-destination pairs and hybrid relay node (HRN). We consider “charge-then-forward” protocol at the HRN, in which HRN with constant energy supply first acts as an transmitter to charge sources, then forwards information from sources their destinations through time division access (TDMA) or frequency (FDMA). Processing costs are taken into account. Our goal is maximize sum rate all transmission by jointly optimizing time, frequency, power resources. The formulated optimization problems for both TDMA FDMA non-convex. For scheme, appropriate transformation, problem reformulated convex be optimally solved. case, we find asymptotically optimal solution dual domain. Furthermore, suboptimal algorithms proposed schemes tradeoff complexity performance. Finally, simulation results validate effectiveness schemes.
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