Electronic shelf label system and method of operating the same

A method of operating an electronic shelf label system performed by electronic shelf label tags matched with a gateway in a relationship of 1:N and updating update data from the gateway through wireless communications, the method comprising:

• receiving information regarding time slots allocated to the gateway from the gateway;
• calculating a remaining sleep time until the next wakeup time using the information regarding the time slots when a wakeup message is received from the gateway;
• and
• setting the electronic shelf label tags to be in a wakeup state when the sleep time has elapsed and transmitting an update data request to the gateway.

An electronic shelf label system comprising:

• an electronic shelf label server;
• a plurality of gateways;
• and
• a plurality of electronic shelf label tags associated with each of the plurality of gateways,
• wherein the electronic shelf label server allocates time slots of a wakeup channel to each of the plurality of gateways and provides update data to the plurality of gateways,
• the plurality of gateways provide information regarding the time slots allocated thereto to the plurality of electronic shelf label tags associated therewith and provide the update data to at least a portion of the plurality of electronic shelf label tags, and
• the plurality of electronic shelf label tags calculate their sleep times using the information regarding the time slots, and are set to be in a wakeup state and transmit an update data request to the gateways associated therewith when the sleep times end.