Joint Throughput Equalization Power Control and Cell-Free Model for Enhancing Performance of WBANs

Wireless body area networks (WBANs) have gained significant attention due to their versatile applications in healthcare and the rapid development of personal healthcare devices. This paper proposes a novel cell-free (CF) model for WBANs, where multiple access points (APs) instantaneously support dis...

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Veröffentlicht in:Wireless personal communications Jg. 139; H. 2; S. 921 - 946
Hauptverfasser: Bao, Bo Quoc, Anh, Bui Tien, Yen, Vu Thi Hoang, Hiep, Pham Thanh, Le, Hai-Nam
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Dordrecht Springer Nature B.V 01.11.2024
Schlagworte:
Algorithms
Body area networks
Closed form solutions
Control algorithms
Control theory
Cost control
Data integrity
Data transmission
Downlinking
Energy consumption
Energy efficiency
Health care
Medical equipment
Nonorthogonal multiple access
Performance enhancement
Power control
Sensors
Sequences
Signal quality
Topology
Uplinking
ISSN:0929-6212, 1572-834X
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Zusammenfassung:Wireless body area networks (WBANs) have gained significant attention due to their versatile applications in healthcare and the rapid development of personal healthcare devices. This paper proposes a novel cell-free (CF) model for WBANs, where multiple access points (APs) instantaneously support distributed sensors placed on the body by allowing all sensors to share the same time and frequency resources. Unlike multiple access schemes, such as non-orthogonal multiple access (NOMA), “cell-free” in our context denotes a decentralized architecture where multiple distributed APs cooperatively serve multiple sensors without the traditional cell boundaries. In NOMA systems, APs communicate with sensors in a cell by superimposing signals at different power levels, whereas CF systems enhance signal quality through joint processing across APs. Different from the traditional star topology WBAN where one AP communicates with only one sensor at a time, the CF model allows all sensors to transceive information data at the same time. Furthermore, a joint CF model and transmit power control algorithm is proposed to control the transmit power of sensors in the uplink and APs in the downlink of the CF model WBAN based on channel conditions in order to reduce the inter-user interference, maintain fairness among all sensors, and thereby improve the per-sensor throughput. The achievable uplink and downlink rates are derived using matched filtering and computational algorithms, resulting in a closed-form solution. The proposed joint method of the CF model and transmit power control algorithm is compared with the CF model without power control and traditional star topology WBANs to assess the effectiveness of the proposed approaches via several key parameters, including the number of sensors, the number of APs, and the length of pilot sequences. Simulation results demonstrate that the proposed approaches enhance system performance in both uplink and downlink across all tested scenarios.
Bibliographie:ObjectType-Article-1
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ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-024-11647-6