Joint Decision-Making and Power Allocation for One-Bit Feedback Sensor Communications

We consider a sensor communication scenario where a sensor node communicates information to a data sink. To aid the sensor, the data sink transmits channel state information (CSI). To obtain the CSI, however, a fixed receive processing energy is incurred by the sensor node. Given a choice, the senso...

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Bibliographic Details
Published inIEEE wireless communications letters Vol. 1; no. 3; pp. 177 - 180
Main Authors Zhang, Xiao Juan, Chin Keong Ho, See Ho Ting, Motani, M., Yi Gong, Pandharipande, A.
Format Journal Article
LanguageEnglish
Published IEEE 01.06.2012
Subjects
Availability
Decision making
imperfect CSI
Joints
Optimization
power allocation
Power control
Resource management
sensor communications
Wireless sensor networks
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Summary:We consider a sensor communication scenario where a sensor node communicates information to a data sink. To aid the sensor, the data sink transmits channel state information (CSI). To obtain the CSI, however, a fixed receive processing energy is incurred by the sensor node. Given a choice, the sensor node may choose not to obtain the CSI if the receive processing energy does not lead to a larger reduction in the transmit energy. In this paper, we study the tradeoff involved in this choice. Specifically, we design the optimal transmit strategy so that the total expected transmit and receive power of the sensor are minimized subject to a target outage probability. We focus on the case in which the feedback packet conveys one bit of CSI to the sensor nodes. Closed-form expressions of suboptimal solutions are obtained and shown to perform close to the optimal solution.
ISSN:2162-2337
2162-2345
DOI:10.1109/WCL.2012.031512.110140