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Discrete-Rate Adaptation and Selection in Energy Harvesting Wireless Systems
- Source :
- IEEE Transactions on Wireless Communications. 14:219-229
- Publication Year :
- 2015
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2015.
-
Abstract
- In a system with energy harvesting (EH) nodes, the design focus shifts from minimizing energy consumption by infrequently transmitting less information to making the best use of available energy to efficiently deliver data while adhering to the fundamental energy neutrality constraint. We address the problem of maximizing the throughput of a system consisting of rate-adaptive EH nodes that transmit to a destination. Unlike related literature, we focus on the practically important discrete-rate adaptation model. First, for a single EH node, we propose a discrete-rate adaptation rule and prove its optimality for a general class of stationary and ergodic EH and fading processes. We then study a general system with multiple EH nodes in which one is opportunistically selected to transmit. We first derive a novel and throughput-optimal joint selection and rate adaptation rule (TOJSRA) when the nodes are subject to a weaker average power constraint. We then propose a novel rule for a multi-EH node system that is based on TOJSRA, and we prove its optimality for stationary and ergodic EH and fading processes. We also model the various energy overheads of the EH nodes and characterize their effect on the adaptation policy and the system throughput.
- Subjects :
- Mathematical optimization
Computer science
business.industry
Applied Mathematics
Node (networking)
Throughput
Energy consumption
Computer Science Applications
Electrical Communication Engineering
Available energy
Bit error rate
Wireless
Fading
Electrical and Electronic Engineering
Telecommunications
business
Energy (signal processing)
Subjects
Details
- ISSN :
- 15361276
- Volume :
- 14
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Wireless Communications
- Accession number :
- edsair.doi.dedup.....f5cac432402d721c879f9b907dcdcbf3