Abstract
In the literature, wireless powered communication networks (WPCNs) are typically assumed to employ dynamic time division multiple access (TDMA), such that the rate and duration for information transmission of each energy harvesting user (EHU) is adjusted in each TDMA frame. Such implementations are fairly complex, so, in this paper, we propose a simple model for a WPCN employing a static TDMA, where each EHU employs fixed rate transmission over fixed time slot duration. Specifically, we develop a simple communication scheme that maximizes the network throughput by proper selection of the duration of the radio frequency energy broadcasts by the base station (BS), and the optimal information rate and optimal transmission duration of each EHU. The performance of such system depends only on the average gains of the channels between the BS and each EHU, which can be estimated more cost effectively than the instantaneous channel state information.
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