JP5366201B2 - Electronic shelf label system and electronic shelf label display change method - Google Patents

Description

  The present invention relates to an electronic shelf label system that uses wireless communication and an electronic shelf label display changing method.

  Conventionally, as an electronic shelf label system using wireless communication, ESL controls ESL when changing the display of product information and price information of an electronic shelf label (hereinafter referred to as “ESL (electronic shelf label)”). Data is transmitted to and received from an electronic shelf label server (hereinafter referred to as “ESL server”). At this time, the following method is adopted as a typical method for suppressing the power consumption of ESL.

  (1) ESL is periodically turned ON / OFF, and when ESL is ON, ESL receives data from the ESL server, fetches the data only when the data is addressed to its own ESL, and based on that data Passive communication method that changes display contents.

  (2) The ESL is periodically turned on / off, and when the ESL is ON, the ESL sends a data request packet for confirming whether or not the data has been updated to the ESL server. An active communication system in which data is transmitted to the corresponding ESL, the data is received, the data is captured, and the display content is changed based on the data.

  (3) Put the clock in the ESL, put the time to update the data into the data from the ESL server to the ESL, and update the data (update the display contents) when the ESL reaches the specified time. An update time designation type communication method that reduces unnecessary power consumption and reduces power consumption.

  Here, an example of a standard configuration of an electronic shelf label system that changes the display of normal ESL will be described with reference to FIGS.

  The electronic shelf label system shown in FIG. 1 includes an ESL server 1, an ESL3 (ESL # 1 to ESL # 5), an ESL base station 2 that relays data communication between the ESL server 1 and ESL3, an ESL server 1, and an ESL. And a communication network 4 with the base station 2.

  FIG. 2 shows an example of the configuration of the ESL server 1 of FIG. Referring to FIG. 2, the ESL server 1 includes an ESL management unit 11 that manages the state of the electronic shelf label system, an ESL data unit 12 that stores data to be transmitted to the ESL 3, and the ESL 3 via the ESL base station 2. A communication control unit 13 that performs communication, a clock 14, a product management unit 15 that manages product data, a product data unit 16 that stores product data, and an ESL control unit that controls ESL via the communication control unit 13 17 and the like.

  FIG. 3 shows an example of the configuration of the ESL base station 2 of FIG. Referring to FIG. 3, the ESL base station 2 includes a communication control unit 21 that communicates with the ESL server 1, an ESL control unit 22 that manages the state of ESL3, an ESL management table 23 that stores the state of ESL3, and ESL3. And a wireless communication control unit 24 that performs wireless communication.

  FIG. 4 shows an example of the configuration of ESL3 in FIG. Referring to FIG. 4, a wireless communication control unit 31 that performs wireless communication with the ESL base station 2, an ESL control unit 32 that controls the operation of the ESL3, a memory unit 33 that stores the state and display data of the ESL3, A power source control unit 34 that performs ON / OFF control, a display unit 35 that performs display, and a clock 36 are included.

  In the passive communication method (1) as a representative method for reducing power consumption, the power supply control unit 34 periodically turns on the power of the ESL control unit 32 and the wireless communication control unit 31, and the wireless communication control unit 31 operates the internal receiving unit, waits for a certain period of time to receive data addressed to the local station from the ESL base station 2, and if there is data addressed to the local station, continues the operation. By performing intermittent reception for turning off the power of the control unit 32 and the wireless communication control unit 31, power consumption is suppressed.

  In the active communication method (2) as a representative method for reducing power consumption, the power supply control unit 34 periodically turns on the power of the ESL control unit 32 and the wireless communication control unit 31, and the wireless communication control unit 31 operates the internal transmission unit and transmits a data request packet for confirming the presence / absence of data addressed to its own station to the ESL base station 2, and if there is data to the ESL3, Tells that there is data and continues communication, but tells that there is no data. In ESL3, if there is no data, the power control unit 34 turns off the power of the ESL control unit 32 and the wireless communication control unit 31 to reduce power consumption.

  In the update time designation type communication method (3) as a typical method for reducing power consumption, the wireless communication unit 31 receives data according to the method (1) or (2) described above and designates it in the data. The power is turned off until the set time, and the power is turned on at that time to update the display content, thereby eliminating unnecessary communication and reducing power consumption.

  In both types (1) and (2), it is necessary to operate the radio communication control unit 31 and the ESL control unit 32 in order to perform radio communication with the ESL base station 2, and power consumption for confirming the presence or absence of data Is big. In addition, if the power ON / OFF interval is lengthened, power consumption can be suppressed, but it takes time for communication between the ESL server 1 and the ESL3 (for example, when updating the display contents of the ESL, the display update is executed by the ESL server 2). Even so, it takes time until the display of ESL3 is updated), and the real-time property is impaired. When the power ON / OFF interval is shortened, the real-time property is improved, but the power consumption increases and the battery life is shortened.

  The method (3) is effective in updating data scheduled in advance, but cannot cope with unscheduled data updating.

JP 2001-266252 A JP 2005-258522 A JP 2007-048140 A Japanese Patent Laid-Open No. 2007-24495 JP 2008-011972 A JP 2008-073081 A

  The passive communication method (1) and the active communication method (2), which are typical conventional methods for reducing power consumption, impair the real-time property of communication and reduce the real-time property when the power consumption is suppressed. There is a problem that power consumption increases and battery life is shortened.

  Further, the update time designation type communication method (3) has an effect of suppressing power consumption when updating data scheduled in advance, but has a problem that it cannot cope with unscheduled data update.

  Accordingly, an object of the present invention is to provide an electronic shelf label system and an electronic shelf label display change method that can reduce the power consumption of ESL and can cope with unscheduled data update.

According to the present invention, in an electronic shelf label system comprising an electronic shelf label server, an electronic shelf label base station, and one or more electronic shelf labels, the electronic shelf label server can be used as an update mode when product data is updated. Means for selecting individual update mode, multi-update mode or total update mode, and electronic shelf label identification for identifying one electronic shelf label corresponding to updated product data when the individual update mode is selected Means for acquiring information from the electronic shelf label data section, transmitting the acquired electronic shelf label identification information and updated product data in an individual mode, and updated product data when the multi-update mode is selected. The electronic shelf label identification information for individually identifying a plurality of electronic shelf labels corresponding to is acquired from the electronic shelf label data section, and the acquired electronic shelf label identification information and the updated product data are And the means for transmitting the updated product data in the 100% mode when the 100% update mode is selected, and the electronic shelf label base station is updated from the electronic shelf label server. when product data is transmitted which is or transmission mode that is the individual mode, and means for determining whether said is the total number mode whether a multi-mode, if the transmission mode is the individual mode A unicast wakeup signal is sent to one electronic shelf label described in the transmitted electronic shelf label identification information, and when an update data request is received from the electronic shelf label, the electronic shelf label is updated. A means for transmitting data, and when the transmission mode is the multi-mode, a broadcast wakeup signal is transmitted to all electronic shelf labels, and is transmitted to all electronic shelf labels. When the multicast update presence / absence confirmation data packet including the identification information about the plurality of electronic shelf labels transmitted in the multi mode is transmitted and an update data request is received from those electronic shelf labels, Means for transmitting update data, and when the transmission mode is the exhaustive mode, a broadcast Wakeup signal is transmitted to all electronic shelf labels, and has been transmitted to all electronic shelf labels in the multi mode. A means for transmitting multicast update presence / absence confirmation data packets including identification information for all electronic shelf labels, and transmitting update data to those electronic shelf labels when receiving update data requests from those electronic shelf labels; The electronic shelf label includes means for intermittently turning on / off a Wakeup signal receiving unit, and the Wakeup signal receiving unit. Means for determining whether the Wakeup signal is a unicast Wakeup signal or a broadcast Wakeup signal when the Wakeup signal is received while the Wakeup signal is ON, and the Wakeup signal is the unicast Wakeup signal Then, the electronic shelf label is put in an Awake state, the update data request is transmitted to the electronic shelf label base station, and when the update data is transmitted from the electronic shelf label base station accordingly, the update data is If the means for storing in the memory unit and the Wakeup signal is the broadcast Wakeup signal, the electronic shelf label is set in the Awake state and a multicast update presence / absence confirmation data packet is received. Includes identification information of the electronic shelf label If it is included, the update data request is transmitted to the electronic shelf label base station, and accordingly, when update data is transmitted from the electronic shelf label base station. And means for storing the update data in a memory unit.

According to the present invention, in the electronic shelf label display changing method in an electronic shelf label system comprising an electronic shelf label server, an electronic shelf label base station, and one or more electronic shelf labels, the electronic shelf label server is configured to store product data. When updated, the step of selecting an individual update mode, a multi-update mode or a total number update mode as an update mode, and when the electronic shelf label server selects the individual update mode, the updated product data Acquiring electronic shelf label identification information for identifying one corresponding electronic shelf label from the electronic shelf label data section, and transmitting the acquired electronic shelf label identification information and updated product data in an individual mode; When the multi-update mode is selected, the electronic shelf label server supplies electronic shelf label identification information for individually identifying a plurality of electronic shelf labels corresponding to the updated product data. Acquiring from the shelf label data section, transmitting the acquired electronic shelf label identification information and updated product data in multi-mode, and when the electronic shelf label server selects the all-update mode, all and transmitting the product data updated addressed electronic shelf labels in all modes, the electronic shelf label base station, when the product data that is updated from the electronic shelf label server has been transmitted, the transmission mode the A step of determining whether the mode is the individual mode, the multi-mode, or the total number mode; and the electronic shelf label base station transmits an electronic shelf that has been transmitted when the transmission mode is the individual mode. When a unicast Wakeup signal is transmitted to one electronic shelf label described in the tag identification information and an update data request is received from the electronic shelf label, the electronic shelf label is updated. Transmitting the data, and when the transmission mode is the multi-mode, the electronic shelf label base station transmits a broadcast wakeup signal to all the electronic shelf labels and transmits the multi-address to all the electronic shelf labels. When a multicast update presence / absence confirmation data packet including identification information about a plurality of electronic shelf labels sent in the mode is transmitted and an update data request is received from those electronic shelf labels, update data is sent to those electronic shelf labels. And the electronic shelf label base station, when the transmission mode is the exhaustive mode, transmits a broadcast wakeup signal to all electronic shelf labels and transmits the multi-mode to all electronic shelf labels. Send a multicast update confirmation data packet containing identification information about all electronic shelf labels sent in When receiving an update data request from the electronic shelf labels, the step of transmitting update data to the electronic shelf labels, the electronic shelf label intermittently turning on / off the Wakeup signal receiving unit, Determining whether the Wakeup signal is a unicast Wakeup signal or a broadcast Wakeup signal when the Wakeup signal reception unit receives a Wakeup signal while the Wakeup signal reception unit is ON; and When the Wakeup signal is the unicast Wakeup signal, the shelf label sets the electronic shelf label to an Awake state, transmits the update data request to the electronic shelf label base station, and accordingly, the electronic shelf label When update data is transmitted from the base station, the update data is stored in the memory unit. The electronic shelf label, when the Wakeup signal is the broadcast Wakeup signal, if the electronic shelf label is in an Awake state and receives a multicast update confirmation data packet, the multicast update presence confirmation data It is determined whether or not the identification information of the electronic shelf label is included in the packet, and if it is included, the update data request is transmitted to the electronic shelf label base station, and accordingly, the electronic shelf label is transmitted. An electronic shelf label display changing method comprising: a step of storing update data in a memory unit when update data is transmitted from a base station.

  According to the present invention, in order to confirm the presence or absence of update data, a Wakeup signal reception capable of operating with very low power consumption without turning on the power of a circuit with high power consumption such as an ESL control unit or a wireless communication control unit. The presence or absence of update data can be confirmed by turning on only the power of each unit, and power consumption can be minimized.

It is the figure which showed the standard structure in the conventional electronic shelf label system. It is the schematic which shows the structure of the ESL server by embodiment of this invention. It is the schematic which showed the structure of the standard ESL base station in the conventional electronic shelf label system. It is the schematic which showed the structure of the standard ESL in the conventional electronic shelf label system. It is the schematic which shows the structure of the electronic shelf label system by embodiment of this invention. It is the schematic which shows the structure of the ESL base station by embodiment of this invention. It is the schematic which shows the structure of ESL by embodiment of this invention. It is a flowchart which shows operation | movement of the ESL server by embodiment of this invention. It is a flowchart which shows the operation | movement of the ESL base station by the form of this invention. It is a flowchart which shows operation | movement of ESL by the form of this invention. It is an example which shows the structure of the Wakeup signal by embodiment of this invention. It is an example which shows the structure of the Wakeup signal transmission part and Wakeup signal reception part by embodiment of this invention. It is a figure which shows an example of the format of the update existence confirmation data packet by embodiment of this invention.

  FIG. 5 is a schematic diagram showing the configuration of the electronic shelf label system according to the embodiment of the present invention.

  Referring to FIG. 5, the electronic shelf label system according to the embodiment of the present invention includes an ESL server 1, an ESL base station 5, and an ESL6 (ESL # 1 to ESL # 5).

  FIG. 2 is a schematic diagram showing the configuration of the ESL server 2 of the electronic shelf label system according to the embodiment of the present invention.

  The ESL server 2 includes an ESL management unit 11 that manages the state of the electronic shelf label system, an ESL data unit 12 that stores data to be transmitted to the ESL 3, and a communication control unit that communicates with the ESL 6 via the ESL base station 2. 13, a clock 14, a product management unit 15 that manages product data, a product data unit 16 that stores product data, and an ESL control unit 17.

  FIG. 6 is a schematic diagram showing the configuration of the ESL base station 5 of the electronic shelf label system according to the embodiment of the present invention.

  The ESL base station 5 includes a communication control unit 51 that communicates with the ESL server 1, an ESL control unit 52 that manages the state of the ESL6, an ESL management table 53 that stores the state of the ESL6, and a wireless that performs wireless communication with the ESL6. A communication control unit 54, a Wakeup signal transmission unit 55 for transmitting a Wakeup signal in order to place the ESL 6 in the Awake state, and a timer 56 are included.

  FIG. 7 is a schematic diagram showing the configuration of the ESL 6 of the electronic shelf label system according to the present invention.

  The ESL 6 receives the wireless communication control unit 61 that performs wireless communication with the ESL base station 5, the ESL control unit 62 that controls the operation of the ESL 6, and the wakeup signal transmitted from the ESL base station 5, and the wakeup signal is transmitted by itself. A Wakeup signal receiving unit 63 that decodes whether or not it is addressed to the ESL6, and notifies the Awake signal to the power supply control unit 64 when the Wakeup signal is addressed to its own ESL, and a power source that performs ON / OFF control of the power supply of the ESL6 It includes a control unit 64, a timer 65 that performs scheduling of ESL6, a memory unit 66 that stores the state of ESL6 and display data, and a display unit 67 that performs display.

  8-10 is a flowchart which shows an example of operation | movement of the electronic shelf label system by embodiment of this invention.

  FIG. 11 is an example showing a configuration of a Wakeup signal of the electronic shelf label system according to the present invention.

  FIG. 12 is an example showing a configuration of a Wakeup signal transmission unit and a Wakeup signal reception unit of the electronic shelf label system according to the present invention.

  FIG. 13 shows an example of the frame format of update confirmation data in the electronic shelf label system according to the present invention.

  2 and 8, first, the product management unit 15 waits until the product data in the product data unit 16 is updated (“None” in step S101).

  If the product data has been updated (“Yes” in step S101), whether the product data of one product has been updated, the product data of a plurality of products has been updated, or all product data has been updated. The merchandise management unit 15 determines whether it has happened (steps S103 and S109).

  When the product data for one product is updated (“individual” in step S103), the ESL management unit 11 identifies one ESL corresponding to the product data updated from the ESL data unit 12. ESL identification information is acquired (step S105). Next, the communication control unit 13 transmits the ESL identification information acquired in step S105 and the updated product data in the individual mode (step S107).

  When product data for a plurality of (but not all) products is updated (“multi” in step S109), the ESL management unit 11 includes a plurality of items corresponding to the product data updated from the ESL data unit 12. ESL identification information for identifying ESLs (but not all) is acquired (step S111). Next, the communication control unit 13 transmits the ESL identification information acquired in step S111 and the updated product data in multimode (step S113).

  When the product data for all the products has been updated (“total number” in step S109), the communication control unit 13 transmits the updated product data to all ESLs in the total number mode (step S115).

  Referring to FIGS. 3 and 9, the communication control unit 21 waits until updated product data or the like is sent from the ESL server 1 (“None” in step S121).

  If updated product data or the like has been sent to the communication control unit 21 (“Yes” in step S121), whether the updated product data or the like has been sent in the individual mode (“individual” in step S123) Then, the determination unit 26 determines whether it is sent in the multi mode (“multi” in step S131) or whether it is sent in the whole number mode (“total number” in step S131).

  When the updated product data and ESL identification information are sent in the individual mode, the wireless communication control unit 24 transmits a unicast Wakeup signal to one ESL corresponding to the ESL identification information (step S125). ), And waits until an update data request is received from the ESL (No in step S127).

  When an update data request is received from the ESL (Yes in step S127), the updated product data is transmitted to the ESL (step S129).

  When the updated product data and ESL identification information are sent in multi-mode, the wireless communication control unit 24 transmits a broadcast wakeup signal to all ESLs (step S133), and then sent. A multicast update presence / absence confirmation data packet including ESL identification information is generated and transmitted to all ESLs in a broadcast frame (step S135). Next, the process waits until an update data request is received from each ESL (No in step S137). If an update data request is received, the update data is transmitted (step S139) is repeated.

  When the updated product data and ESL identification information are sent in the exhaustive mode, the wireless communication control unit 24 transmits a broadcast wakeup signal to all ESLs (step S141), and then all the ESLs. A multicast update presence / absence confirmation data packet including the ESL identification information is generated and transmitted to all the ESLs on the broadcast frame (step S143). Next, the process waits until an update data request is received from each ESL (No in step S137). If an update data request is received, the update data is transmitted (step S139) is repeated.

  4 and 10, the power supply control unit 64 turns on the power of the Wakeup signal receiving unit 63 (step S141), and the wireless communication control unit 61 while the power of the Wakeup signal receiving unit 63 is on. If the Wakeup signal is not received (“None” in step S143), the power supply control unit 165 turns off the power of the Wakeup signal reception unit 63 when the timer 65 times out (step S165).

  When the wireless communication control unit 61 receives a Wakeup signal while the power of the Wakeup signal receiving unit 63 is ON (“Yes” in step S143), the Wakeup signal is a unicast Wakeup signal addressed to the own station. It is determined whether or not (step S145). If so (Yes in step S145), the power supply control unit 64 turns off the power of the wakeup signal reception unit 63 and turns on the power supply of the ESL control unit 62 (step S147).

  Next, the ESL control unit 62 requests an update data request from the ESL base station 5 via the wireless communication control unit 61 (step S149), and the update transmitted from the ESL base station 5 accordingly. The data is received (step S151), and the updated data is stored in the memory unit 66 (step S153).

  Finally, the ESL control unit 62 sends a sleep notification to the power supply control unit 64, and the ESL enters the sleep state (step S155).

  If NO in step S145, it is determined whether or not the received Wakeup signal is a broadcast Wakeup signal (step S157).

  When that is not right (it is No at step S157), the power supply control part 64 turns off the power supply of the Wakeup signal receiving part 63 (step S165).

  If so (Yes in Step S157), the power supply control unit 64 turns off the power of the Wakeup signal reception unit 63 and turns on the power supply of the ESL control unit 62 (Step S159).

  Next, the wireless communication control unit 61 receives the multicast update presence / absence confirmation data packet (step S161), and when the multicast update presence / absence confirmation data packet includes the identifier of the own station (Yes in step S163), The process proceeds to step S149, and if not (No in step S163), the process proceeds to step S155.

  In the example of FIG. 12, the Wakeup signal is transmitted by the frequency modulation method, but a pulse modulation method or a phase modulation method may be used.

1 ESL server 5 ESL base station 6 ESL
DESCRIPTION OF SYMBOLS 11 ESL management part 12 ESL data part 13 Communication control part 14 Clock 15 Goods management part 16 Goods data part 17 ESL control part 51 Communication control part 52 ESL control part 53 ESL management table 54 Wireless communication control part 55 Wakeup signal transmission part 56 Timer 61 Wireless communication control unit 62 ESL control unit 63 Wakeup signal receiving unit 64 Power supply control unit 65 Timer 66 Memory unit 67 Display unit

Claims (5)

In an electronic shelf label system comprising an electronic shelf label server, an electronic shelf label base station, and one or more electronic shelf labels,
The electronic shelf label server
Means for selecting an individual update mode, a multi-update mode or a total update mode as an update mode when the product data is updated;
When the individual update mode is selected, electronic shelf label identification information for identifying one electronic shelf label corresponding to the updated product data is acquired from the electronic shelf label data section, and the acquired electronic shelf label identification Means for sending information and updated product data in individual mode;
When the multi-update mode is selected, electronic shelf label identification information for individually identifying a plurality of electronic shelf labels corresponding to the updated product data is acquired from the electronic shelf label data section, and the acquired electronic shelf Means for transmitting the tag identification information and the updated product data in multi-mode;
Means for transmitting the updated product data in the total number mode when the total number update mode is selected;
With
The electronic shelf label base station
Wherein when the product data that is updated from the electronic shelf label server is transmitted, or transmission mode that is the individual mode, and means for determining whether said is the total number mode whether a multi-mode,
When the transmission mode is the individual mode, a unicast Wakeup signal is transmitted to one electronic shelf label described in the transmitted electronic shelf label identification information, and an update data request is issued from the electronic shelf label. Means for sending update data to the electronic shelf label when received,
When the transmission mode is the multi-mode, a broadcast wakeup signal is transmitted to all electronic shelf labels, and identification of a plurality of electronic shelf labels transmitted in the multi-mode to all electronic shelf labels A means for sending multicast update presence / absence confirmation data packets including information and sending update data to those electronic shelf labels when receiving an update data request from those electronic shelf labels;
When the transmission mode is the exhaustive mode, a broadcast wakeup signal is transmitted to all electronic shelf labels, and identification of all electronic shelf labels transmitted in the multi-mode to all electronic shelf labels is performed. A means for sending multicast update presence / absence confirmation data packets including information and sending update data to those electronic shelf labels when receiving an update data request from those electronic shelf labels;
With
The electronic shelf label
Means for intermittently turning on and off the Wakeup signal receiving unit;
Means for determining whether the Wakeup signal is a unicast Wakeup signal or a broadcast Wakeup signal when the Wakeup signal is received while the Wakeup signal receiving unit is ON;
When the Wakeup signal is the unicast Wakeup signal, the electronic shelf label is set in an Awake state, the update data request is transmitted to the electronic shelf label base station, and the electronic shelf label base station is updated accordingly. Means for storing the update data in the memory unit when the data is transmitted;
When the Wakeup signal is the broadcast Wakeup signal, if the electronic shelf label is placed in an Awake state and a multicast update presence / absence confirmation data packet is received, the identification information of the electronic shelf label is included in the multicast update presence / absence confirmation data packet. It is determined whether or not it is included, and if it is included, the update data request is transmitted to the electronic shelf label base station, and accordingly, update data is transmitted from the electronic shelf label base station. Sometimes means for storing the updated data in the memory unit;
An electronic shelf label system comprising: In an electronic shelf label display changing method in an electronic shelf label system comprising an electronic shelf label server, an electronic shelf label base station, and one or more electronic shelf labels,
The electronic shelf label server, when the product data is updated, selecting an individual update mode, a multi-update mode or a total number update mode as an update mode;
The electronic shelf label server acquires electronic shelf label identification information for identifying one electronic shelf label corresponding to the updated product data from the electronic shelf label data section when the individual update mode is selected. Sending the acquired electronic shelf label identification information and the updated product data in individual mode;
When the electronic shelf label server selects the multi-update mode, electronic shelf label identification information for individually identifying a plurality of electronic shelf labels corresponding to the updated product data is obtained from the electronic shelf label data section. Acquiring and acquiring the acquired electronic shelf label identification information and the updated product data in multi-mode;
The electronic shelf label server, when the all number update mode is selected, transmitting the product data updated to all electronic shelf labels in the all number mode;
The electronic shelf label base station, wherein when the electronic shelf label product data that is updated from the server has been transmitted, or transmission mode that is the individual mode, whether it is the multi-mode a is the one wherein the total number mode A step of judging;
When the transmission mode is the individual mode, the electronic shelf label base station transmits a unicast Wakeup signal to one electronic shelf label described in the transmitted electronic shelf label identification information. A step of transmitting update data to the electronic shelf label when an update data request is received from the electronic shelf label;
When the electronic shelf label base station transmits the broadcast wakeup signal to all electronic shelf labels when the transmission mode is the multi mode, the electronic shelf label base station has been transmitted to all electronic shelf labels in the multi mode. Sending a multicast update presence / absence confirmation data packet including identification information about a plurality of electronic shelf labels, and receiving update data requests from those electronic shelf labels, sending update data to those electronic shelf labels;
The electronic shelf label base station, when the transmission mode is the exhaustive mode, transmits a broadcast Wakeup signal to all electronic shelf labels, and has been transmitted to all electronic shelf labels in the multi mode. Sending multicast update presence / absence confirmation data packets including identification information for all electronic shelf labels, and receiving update data requests from those electronic shelf labels, sending update data to those electronic shelf labels;
The electronic shelf label intermittently turning on and off the Wakeup signal receiving unit;
Determining whether the Wakeup signal is a unicast Wakeup signal or a broadcast Wakeup signal when the Wakeup signal reception unit receives a Wakeup signal while the Wakeup signal reception unit is ON;
If the electronic shelf label is the unicast wakeup signal, the electronic shelf label sets the electronic shelf label to an awake state, transmits the update data request to the electronic shelf label base station, and accordingly, the electronic shelf label When update data is transmitted from the shelf label base station, storing the update data in the memory unit;
When the electronic shelf label is in the Awake state when the Wakeup signal is the broadcast Wakeup signal and receives the multicast update presence / absence confirmation data packet, the electronic shelf label includes It is determined whether or not the identification information of the shelf label is included, and if it is included, the update data request is transmitted to the electronic shelf label base station, and the update is performed from the electronic shelf label base station accordingly. When data is transmitted, storing the update data in the memory unit;
An electronic shelf label display changing method comprising: Means for selecting an individual update mode, a multi-update mode or a total update mode as an update mode when the product data is updated;
When the individual update mode is selected, electronic shelf label identification information for identifying one electronic shelf label corresponding to the updated product data is acquired from the electronic shelf label data section, and the acquired electronic shelf label identification Means for sending information and updated product data in individual mode;
When the multi-update mode is selected, electronic shelf label identification information for individually identifying a plurality of electronic shelf labels corresponding to the updated product data is acquired from the electronic shelf label data section, and the acquired electronic shelf Means for transmitting the tag identification information and the updated product data in multi-mode;
Means for transmitting the updated product data in the total number mode when the total number update mode is selected;
An electronic shelf label server comprising: When the commodity data that has been updated from the electronic shelf label server has been transmitted, and means for determining whether the transmission mode is that of whether all the number mode is for either multimode is individual-specific mode,
When the transmission mode is the individual mode, a unicast Wakeup signal is transmitted to one electronic shelf label described in the transmitted electronic shelf label identification information, and an update data request is issued from the electronic shelf label. Means for sending update data to the electronic shelf label when received,
When the transmission mode is the multi-mode, a broadcast wakeup signal is transmitted to all electronic shelf labels, and identification of a plurality of electronic shelf labels transmitted in the multi-mode to all electronic shelf labels A means for sending multicast update presence / absence confirmation data packets including information and sending update data to those electronic shelf labels when receiving an update data request from those electronic shelf labels;
When the transmission mode is the exhaustive mode, a broadcast wakeup signal is transmitted to all electronic shelf labels, and identification of all electronic shelf labels transmitted in the multi-mode to all electronic shelf labels is performed. A means for sending multicast update presence / absence confirmation data packets including information and sending update data to those electronic shelf labels when receiving an update data request from those electronic shelf labels;
An electronic shelf label base station comprising: Means for intermittently turning on and off the Wakeup signal receiving unit;
Means for determining whether the Wakeup signal is a unicast Wakeup signal or a broadcast Wakeup signal when the Wakeup signal is received while the Wakeup signal receiving unit is ON;
Wherein when Wakeup signal is the unicast Wakeup signals, electronic and the shelf label to the Awake state, and transmits the update data request to the electronic shelf label base station, in response thereto, updating from the electronic shelf label base station Means for storing the update data in the memory unit when the data is transmitted;
When the Wakeup signal is the broadcast Wakeup signal, if the electronic shelf label is placed in an Awake state and a multicast update presence / absence confirmation data packet is received, the identification information of the electronic shelf label is included in the multicast update presence / absence confirmation data packet. It is determined whether or not it is included, and if it is included, the update data request is transmitted to the electronic shelf label base station, and accordingly, update data is transmitted from the electronic shelf label base station. Sometimes means for storing the updated data in the memory unit;
An electronic shelf label comprising:

Images