Wireless identification systems and protocol

G - Physics – 08 – B

Patent

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Details

G08B 5/22 (2006.01) G06K 7/00 (2006.01) G06K 15/00 (2006.01) G06K 19/07 (2006.01) G07C 9/00 (2006.01) G08B 1/08 (2006.01) H04Q 5/22 (2006.01)

Patent

CA 2450727

Monitoring systems and protocols (100) are disclosed that are flexible in mode operation and format depending on the environment in which they are used. Such monitoring systems and protocols are able to change their utilization automatically, or by received instruction to do so. A location detection system includes one or more low frequency transmitters (110, 120), one or more radio frequency monitoring tags (130) and one or more receiving devices. The low frequency transmitter location identification information, such as the transmitter ID, to a tag in the vicinity of the transmission. The tag relays the transmitter ID using a higher frequency transmission sent from the tag to the receiver. Communication protocols are disclosed that enable deciphering of multiple tag transmissions starting simultaneously.

Cette invention concerne des systèmes de surveillance et des protocoles dont le mode opératoire et le format varient en fonction de l'environnement dans lequel ils sont utilisés. De tels systèmes de surveillance et protocoles sont en mesure de modifier leur utilisation automatiquement, ou bien lorsqu'ils reçoivent des instructions dans ce sens. Un système de détection de localisation comprend un ou plusieurs émetteurs basse fréquence, une ou plusieurs étiquette de surveillance de fréquence radio et un ou plusieurs dispositifs récepteurs. L'émetteur basse fréquence transmet des informations d'identification de localisation, tel qu'un ID émetteur, à une étiquette à proximité de l'émetteur. Cette étiquette relaie l'ID émetteur au récepteur au moyen d'une fréquence de transmission plus élevée. Sont décrits des protocoles de communication qui permettent de déchiffrer des transmissions à balise multiple commençant simultanément.

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