This paper studies the newly emerging wireless powered communication network in which
one hybrid access point (H-AP) with constant power supply coordinates the wireless
energy/information transmissions to/from a set of distributed users that do not have other
energy sources. A" harvest-then-transmit" protocol is proposed where all users first harvest
the wireless energy broadcast by the H-AP in the downlink (DL) and then send their
independent information to the H-AP in the uplink (UL) by time-division-multiple-access …

This paper considers a time division multiple access scenario where a wireless access point
transmits to a group of users which harvest the energy and then use this energy to transmit
back to the access point. Past approaches have found the optimal time allocation to
maximize sum throughput under the assumption that the users must use all of their
harvested power in each block of the “harvest-then-transmit” protocol. This paper considers
optimal time and energy allocation to maximize the sum throughput for the case when the …