Power Impact of Loop Buffer Schemes for Biomedical Wireless Sensor Nodes

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Artés García, Antonio and Ayala Rodrigo, José Luis and Catthoor, Francky (2012) Power Impact of Loop Buffer Schemes for Biomedical Wireless Sensor Nodes. Sensors, 12 (11). pp. 15088-15118. ISSN 1424-8220

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Official URL: https://doi.org/10.3390/s121115088




Abstract

Instruction memory organisations are pointed out as one of the major sources of energy consumption in embedded systems. As these systems are characterised by restrictive resources and a low-energy budget, any enhancement in this component allows not only to decrease the energy consumption but also to have a better distribution of the energy budget throughout the system. Loop buffering is an effective scheme to reduce energy consumption in instruction memory organisations. In this paper, the loop buffer concept is applied in real-life embedded applications that are widely used in biomedical Wireless Sensor Nodes, to show which scheme of loop buffer is more suitable for applications with certain behaviour. Post-layout simulations demonstrate that a trade-off exists between the complexity of the loop buffer architecture and the energy savings of utilising it. Therefore, the use of loop buffer architectures in order to optimise the instruction memory organisation from the energy efficiency point of view should be evaluated carefully, taking into account two factors: (1) the percentage of the execution time of the application that is related to the execution of the loops, and (2) the distribution of the execution time percentage over each one of the loops that form the application.


Item Type:Article
Uncontrolled Keywords:power impact; loop buffer; instruction memory organisation; biomedical; wireless sensor node
Subjects:Sciences > Computer science
Sciences > Computer science > Networks
Medical sciences > Medicine > Medical telematics
ID Code:67838
Deposited On:17 Sep 2021 11:01
Last Modified:17 Sep 2021 11:04

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