Minimizing Source-Sum-Power Consumption in Multi-Sensor Single-Relay Networks

This letter provides an exact and optimal power allocation for a sensor network that consists of multiple sensor-destination pairs and a single relay. The objective of the power allocation is to minimize the sum of transmitting powers by the sensors that have a signal-to-noise-ratio (SNR) constraint...

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Bibliographic Details
Published in:IEEE transactions on communications 2011-09, Vol.59 (9), p.2362-2366
Main Authors: KIM, Insook, KIM, Dongwoo
Format: Article
Language:English
Subjects:
Allocations
Applied sciences
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Indexes
Information, signal and communications theory
KKT condition
Mathematical models
Networks
Optimization
Optimized production technology
Relay
Relaying
relaying technique
Relays
Resource management
sensor networks
Sensors
Signal and communications theory
Signal to noise ratio
Signal, noise
Source-sum-power minimization
Telecommunications and information theory
Wireless sensor networks
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Description
Summary:This letter provides an exact and optimal power allocation for a sensor network that consists of multiple sensor-destination pairs and a single relay. The objective of the power allocation is to minimize the sum of transmitting powers by the sensors that have a signal-to-noise-ratio (SNR) constraint. After checking the feasibility of power allocation, an optimal solution is provided using Karush-Kuhn-Tucker (KKT) condition. With numerical investigation, the optimality of the proposed solution is illustratively verified and it is also shown that the extent of reduction in the sum-power consumption achieved by introducing the relay depends on the available relaying power and the number of sources.
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2011.062311.100101