System and method for updating electronic shelf labels and updating apparatus and method of an electronic shelf label

摘要

An exemplary embodiment of a system for updating electronic shelf labels (ESLs) comprises multiple ESLs, and a gateway connected to the multiple ESLs to update data of the multiple ESLs. Each ESL comprises a transceiver having a media condition detector to detect whether other ESL(s) perform an update at the time slot, a controller, a memory, and a random number generator randomly selecting one of multiple time slots of a frame when an ESL update procedure begins, wherein the time slot corresponds to an index stored in the memory by the controller. The ESL performs the update at this time slot when none of said other ESL(s) performs the update at the time slot. When said other ESL(s) performs the update at the time slot, the controller enables the random number generator to randomly select another time slot from a next time frame.

主权项

1. A system for updating electronic shelf labels (ESLs), comprising multiple ESLs and a gateway connected to the multiple ESLs to update at least one data of at least one of the multiple ESLs, and each ESL further including:
a random number generator that selects a time slot from multiple time slots of a time frame when an ESL update procedure begins, wherein the time slot corresponds to an index value; a transceiver including a media condition detector to detect whether other ESL(s) of the multiple ESLs performs an update at the time slot; a memory; and a controller that stores the index value in the memory; wherein the ESL calculates an update parameter through periodically exchanging one or more messages with the other ESL(s), performs an update at the time slot according to the update parameter when none of the other ESL(s) performs the update at the time slot, and the controller enables the random number generator to randomly select another time slot from a next time frame when the other ESL(s) performs the update at the time slot.