BATTERY LIFETIME PREDICTION METHOD OF WIRELESS SENSOR NETWORK IN STATE MONITOR SYSTEM

PROBLEM TO BE SOLVED: To provide a battery lifetime prediction method using information on a total number of packets transmitted within a fixed period in sensor nodes in order to suppress a power load required for battery lifetime prediction as further as possible.SOLUTION: The battery lifetime pred...

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Bibliographische Detailangaben
Hauptverfasser:	IWASAWA NAGATERU, RYUO TOMOKO, HANEDA AKIO
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY GENERATION MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES PHYSICS PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY SYSTEMS FOR STORING ELECTRIC ENERGY TESTING WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a battery lifetime prediction method using information on a total number of packets transmitted within a fixed period in sensor nodes in order to suppress a power load required for battery lifetime prediction as further as possible.SOLUTION: The battery lifetime prediction method of a wireless sensor network in a state monitor system comprises: estimating a packet flow from the number of transmitted packets in wireless sensor nodes; calculating a packet flow probability; computing a remaining battery capacitance of a wireless sensor node in which battery exhaustion first occurs, up to a time point when such a sensor node occurs; then performing update to a packet flow probability in removing the sensor node in which battery exhaustion occurs; computing the remaining battery capacitance of a wireless sensor in which battery exhaustion occurs up to the moment when such a sensor node is next generated; and then repeating the operations until battery exhaustion occurs in all the wireless sensor nodes.