On Buffer-Constrained Throughput of a Wireless-Powered Communication System

In this paper, the buffer-constrained throughput performance of a multi-user wireless-powered communication (WPC) system is investigated, where energy harvesting follows a non-linear model. The investigation focuses on the buffer overflow performance of sending data in the downlink (DL) from the acc...

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Bibliographic Details
Published in:IEEE journal on selected areas in communications Vol. 37; no. 2; pp. 283 - 297
Main Authors: Li, Zhidu, Jiang, Yuming, Gao, Yuehong, Sang, Lin, Yang, Dacheng
Format: Journal Article
Language:English
Published: New York IEEE 01.02.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Batteries
buffer overflow performance
buffer-constrained throughput
Buffers
Communications systems
Constraints
Cybersecurity
Energy exchange
Energy harvesting
Energy storage
Energy transmission
Investigations
Nodes
Optimization
Power management
Resource management
Storage capacity
Throughput
Wireless communication
Wireless communications
Wireless-powered communication system
WPC resource allocation
ISSN:0733-8716, 1558-0008
Online Access:Get full text
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Summary:In this paper, the buffer-constrained throughput performance of a multi-user wireless-powered communication (WPC) system is investigated, where energy harvesting follows a non-linear model. The investigation focuses on the buffer overflow performance of sending data in the downlink (DL) from the access point (AP) node to each user equipment (UE) node and that in the uplink from each UE node to the AP node, based on which the throughput performance on both directions when a buffer constraint is enforced is studied. Specifically, the buffer overflow probability at each node is analyzed, based on which the buffer-constrained throughput is studied. In addition, to ensure the throughput performance under the buffer constraint, the DL transmission power allocation policy and the required energy storage capacity at each UE are investigated. Also, the optimal channel time allocation policy is studied with the objective of maximizing the minimum buffer-constrained throughput guaranteed to each UE at the same time. To this aim, an optimization problem is first formulated and then a dichotomy-based time allocation algorithm combined with a one-dimensional search is proposed to solve this problem. The analysis and results, explicitly relating the throughput to the buffer constraint in addition to WPC characteristics, shed new light on the design and performance analysis of WPC systems.
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ISSN:0733-8716
1558-0008
DOI:10.1109/JSAC.2018.2872374