JP2014123339A - Esl terminal and control method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ESL terminal and a control method thereof.SOLUTION: The ESL terminal control method comprises the steps of: a MAC processing part acquiring a frame through a gateway; determining whether it is a wake-up frame, and updating a wake-up variable of the MAC processing part; and waking up a central processing part on the basis of Group ID of the wake-up frame.

Description

  The present invention relates to an ESL terminal and a control method thereof.

  In general, at the sales floor, paper labels indicating product information such as sales price, discount information, unit price, and place of origin for the products displayed on the shelves are used. In the price display method using such a paper label, when the product information is changed or the display position of the product is changed, the used paper label must be discarded and a new paper label must be created. Therefore, sustained costs are incurred for maintenance. In addition, in terms of environmental aspects, paper as a raw material is wasted and negatively affects environmental protection.

  As a result, research and development on an electronic price display (or electronic shelf label (ESL)) has been actively conducted as a means for replacing the conventional paper label.

  The electronic price display device is arranged on the shelf of the sales floor and shows various price information through a display means such as an LCD. It has the advantage that it can be used repeatedly by receiving the input of new product information and updating the displayed product information.

  On the other hand, since the ESL tag (Tag) used in the electronic price display is driven by a battery, reducing the power consumption of the terminal is an important factor determining the market competitiveness of the product.

  Patent Document 1 described in the following prior art document relates to an ESL terminal and system using an RFID method that can update product information of an electronic price display (ESL, Electronic Shelf label) in real time, and a method thereof. Therefore, a configuration for reducing the power consumption of the ESL terminal is not disclosed.

Korea Open Patent 2010-0128906

  The present invention provides an ESL terminal capable of reducing power consumption and a control method thereof.

  In addition, the present invention provides an ESL terminal that can periodically check whether there is an abnormality and a control method therefor.

  An ESL terminal control method according to an aspect of the present invention includes a step in which a MAC processing unit acquires a frame by a gateway, a step of determining whether the frame is a wake-up frame and updating a wake-up variable of the MAC processing unit And wake up the central processing unit based on the group ID of the wakeup frame.

  The step of updating the wakeup variable may include a step of comparing the wakeup variable of the wakeup frame and the wakeup variable of the MAC processing unit when the frame received by the MAC processing unit is a wakeup frame. .

  The step of updating the wake-up variable may be performed when the frame received by the MAC processing unit is not a wake-up frame.

  The step of waking up the central processing unit based on the group ID of the wakeup frame is a failure of the MAC processing unit when the group ID of the wakeup frame is different from the ID of the MAC processing unit. A step of increasing the variable and a step of comparing the failure variable with the allowable failure information may be included.

  When the failure variable is smaller than the allowable failure information, the MAC processing unit can be switched to the sleep state.

  If the failure variable is greater than the allowable failure information, the forced wakeup variable can be set to true to wake up the central processing unit.

  The ESL terminal control method may further include a step of reading a wakeup frame based on a set value of a forced wakeup variable.

  An ESL terminal according to an aspect of the present invention includes a wireless communication unit that receives a predetermined frame by a gateway, a MAC processing unit that determines whether the received frame is a wakeup frame, and updates a wakeup variable. And a central processing unit that wakes up based on a group ID of the wakeup frame.

  When the group ID of the wakeup frame is different from the ID of the MAC processing unit, the MAC processing unit can increase the failure variable of the MAC processing unit and compare the failure variable with the allowable failure information. .

  The MAC processing unit can switch to a sleep state when the failure variable is smaller than the allowable failure information.

  If the failure variable is larger than the allowable failure information, the MAC processing unit may set the forced wakeup variable to true and wake up the central processing unit.

  The disclosure of the present specification can provide an ESL terminal capable of reducing power consumption and a control method thereof.

  Further, according to the disclosure of the present specification, it is possible to provide an ESL terminal that can periodically check the presence or absence of abnormality and a control method thereof.

It is a block block diagram of the electronic price display system by one Embodiment of this invention. 1 is a diagram illustrating a shape in which an electronic price display system according to an embodiment of the present invention is actually applied to a sales floor. FIG. 6 is a block diagram illustrating an ESL terminal according to an embodiment disclosed herein. 5 is a flowchart illustrating a control flow of an ESL terminal according to an exemplary embodiment of the present invention. 6 is a diagram illustrating a step of determining whether a wake-up frame according to an exemplary embodiment of the present invention. 6 is a flowchart illustrating a step of determining whether to wake up or not in an embodiment of the present invention. It is the flowchart which showed the step which a central processing part performs after wakeup.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. However, the same reference numerals are given to the same or similar components regardless of the reference numerals, and redundant description is omitted. The suffixes “module” and “part” for the components used in the following description are given or mixed together to facilitate the preparation of the specification, and have a distinct meaning or role. It does not have. Further, in describing the embodiments disclosed in this specification, if it is determined that a specific description of related known functions can eliminate the gist of the present invention, a detailed description thereof will be given. Omitted. The accompanying drawings are provided to facilitate understanding of the embodiments disclosed in the present specification, and the technical ideas disclosed in the present specification are limited by the attached drawings. Don't be understood.

  FIG. 1 is a block diagram of an electronic price display system according to an embodiment of the present invention.

  As shown in FIG. 1, the electronic price display system according to an embodiment of the present invention may include a management server unit 100, an interface unit 200, a gateway unit 400, and an ESL tag unit 500.

  The management server unit 100 may be implemented by a database server that stores and manages product information for products displayed on the sales floor. The management server unit can store not only product information but also various information required for operating the sales floor. In addition, the management server unit 100 can create and manage command messages for performing various functions such as synchronization, update, and change of product information displayed on the ESL terminal 600. For this reason, the management server unit 100 can include an ESL terminal 600 and a database for product information shown therein. That is, it is possible to provide a database in which identification information for the ESL terminal 600 and merchandise information indicated by the corresponding ESL terminal are stored in conjunction with each other.

  The interface unit 200 transmits a command message generated by the management server unit 100 (for example, an update message for product information, a product information change message, a management information acquisition message, etc.) to the gateway unit 400 in real time. The function of forming a communication channel between the unit 100 and the gateway unit 400 can be performed. For example, the interface unit 200 performs a function of configuring a message generated in the management server unit 100 into an appropriate packet according to a preset communication method used for communication with the gateway unit 400 and transmitting the packet. Can do. The interface unit 200 receives an input of a reception confirmation message transmitted from the gateway unit 400 by a preset communication method, converts the message into a message that can be received by the management server unit 100, and transmits the message. Subsequent operations can be allowed to proceed.

  The gateway unit 400 may include a plurality of gateways 410 that communicate with the management server unit 100. The gateway 410 of the gateway unit 400 analyzes the data received from the management server unit 100 to confirm whether there is a message or data to be transmitted to the ESL terminal 600 communicating with itself, and the confirmed message Alternatively, it plays a role of transmitting data to the corresponding ESL terminal 600. The gateway 410 can compose a message to be transmitted to the ESL terminal 600 into a packet by a preset communication method and transmit the packet to the ESL terminal 600. Further, the gateway 410 can transmit a reception confirmation message received from the ESL terminal 600 to the server. As a communication method between the gateway 410 and the ESL terminal 600, a Zigbee (ie, IEEE 802.15.4) method is used so that a large number of ESL terminals 600 can communicate through one gateway 410. The wireless communication method can be applied.

  The ESL tag unit 500 may include a plurality of ESL terminals 600 that display data on the product information received from the gateway 410 on a display and transmit an operation result of the data reception to the gateway 410. A plurality of ESL terminals 600 included in one ESL tag unit 500 can communicate with one gateway 410. As described above, a ZigBee wireless communication method can be applied so that communication can be performed between one gateway 410 and a plurality of ESL terminals 600, and the gateway and the ESL terminals can be implemented more efficiently. The communication operation separated into the two channels of the wake-up channel and the data channel can be performed in the communication with the communication.

  The wake-up channel means a communication channel for transmitting a wake-up signal (wake-up frame) indicating the presence or absence of data to be received. The data channel means a communication channel for transmitting data actually used for a display.

  Since the ESL tag unit 500 is disposed in an environment where it is difficult to constantly supply power from the outside, the ESL tag unit 500 supplies power using a battery. Therefore, it is important to minimize power consumption so that it can be used for a long time of several years or more with a single battery replacement. Therefore, it is mainly operated by using the wake-up method. The That is, the ESL terminal 600 can periodically wake up a preset time and check whether there is data to be received. Alternatively, the ESL terminal 600 may wake up by an external interrupt and check whether there is data to be received by the ESL terminal 600. At this time, when it is confirmed that there is no data to be received by the ESL terminal 600, the power consumption is minimized until the next wake-up cycle by operating in the sleep mode. That is, only when it is confirmed that there is data to be received by the ESL terminal 600, it is possible to operate to supply power to a predetermined functional unit and receive and process the data.

  Another embodiment of the present invention may further include a personal information terminal (PDA) 300 that allows a user to communicate directly with the management server unit 100. The personal information terminal (PDA) 300 can transmit user input information to the management server unit 100. The user input information may relate to synchronization between a displayed product and an ESL terminal indicating product information for the displayed product. Alternatively, it may be for deactivation of the currently shown product and the synchronized ESL terminal.

  FIG. 2 is a view showing a shape in which an electronic price display system according to an embodiment of the present invention is actually applied to a sales floor.

  As shown in FIG. 2, an ESL terminal 600 indicating product information for the displayed product can be arranged on a shelf on which the product is displayed, and the ESL terminal 600 is arranged at a certain position in the sales floor. The price information can be changed or activated or deactivated while communicating with the gateway 410. The sales floor manager can use the personal information terminal 300 to transmit an instruction to synchronize the product with the ESL terminal 600 or to correct the information to the management server unit.

  The gateway 410 can be connected to the ESL terminal 600 through a predetermined ZigBee channel.

  Hereinafter, the ESL terminal 600 applied to the electronic price display system configured as described above will be described in more detail.

  FIG. 3 is a block diagram illustrating an ESL terminal according to an embodiment disclosed herein.

  The ESL terminal 600 may include a wireless communication unit 610, a MAC processing unit 620, a central processing unit 630, a memory, and the like. The components shown in FIG. 3 are not essential, and an ESL terminal having more or less components can be implemented.

  The wireless communication unit 610 performs a function for enabling wireless communication between the ESL terminal and the gateway 410. For example, the wireless communication unit 610 can receive update data for product information by the gateway 410.

  The update data for the product information can include information on whether or not the product information indicated by the ESL terminal is updated, an updated price, and the like.

  The MAC processing unit 620 and the central processing unit 630 can analyze and process data received by the wireless communication unit 610.

  When the digital processing of the PHY layer is completed, the MAC processing unit 620 can interpret the structure of the transmitted data frame, approve the frame, detect an error, and determine whether to retransmit.

  The central processing unit 630 can receive, analyze and process the data processed in the MAC processing unit 620.

  FIG. 4 is a control flowchart of an ESL terminal according to an embodiment of the present invention.

  Referring to FIG. 4, the wireless communication unit 610 according to an embodiment of the present invention may receive a predetermined frame from the gateway 410 (S410).

  The frame may be a wakeup frame or a data frame.

  According to an embodiment of the present invention, the MAC processing unit 620 may determine whether the frame received by the wireless communication unit 610 is a wake-up frame (S420).

  FIG. 5 is a diagram illustrating a step of determining whether the frame is a wake-up frame according to an exemplary embodiment of the present invention.

  Referring to FIG. 5, the MAC processing unit 620 may determine whether the frame received by the wireless communication unit 610 is a wake-up frame or a data frame (S521).

  If the frame acquired by the MAC processing unit 620 is not a wake-up frame, the MAC processing unit can be switched to a sleep state (S523). This is because, when the frame is not a wake-up frame, the ESL terminal does not perform any further operation and power consumption is reduced.

  When the frame acquired by the MAC processing unit 620 is a wakeup frame, the MAC processing unit can compare the frame wakeup variable with the wakeup variable of the MAC processing unit (S522). The wakeup variable means a message included in the wakeup frame and the MAC processing unit. The wake-up variable may include information on the wake-up order.

  If the frame wakeup variable matches the wakeup variable of the MAC processing unit, the MAC processing unit may be switched to a sleep state (S523).

  If the frame wakeup variable does not match the wakeup variable of the MAC processing unit, the MAC processing unit can update the wakeup variable of the MAC processing unit (S530). For example, the frame wakeup variable can be set as the wakeup variable of the MAC processing unit.

  By the above method, the MAC processing unit can determine whether the received frame is a wakeup frame and can update the wakeup variable.

  Referring to FIG. 4, the MAC processing unit according to an embodiment of the present invention may determine whether the central processing unit wakes up based on the group ID of the wakeup frame (S440). ).

  The group ID is information included in the frame, and includes unique information of a terminal to be woken up.

  That is, an ESL terminal including unique information that matches the group ID must be woken up.

  Therefore, according to an embodiment of the present invention, the MAC processing unit can compare the group ID of the received frame with the group ID of the ESL terminal. In addition, when the group ID of the frame matches the group ID of the ESL terminal, the MAC processing unit can wake up the central processing unit.

  As described above, the ESL terminal according to an embodiment of the present invention implements a low-power ESL terminal by waking up the central processing unit only when the group ID of the wake-up frame matches the group ID of the ESL terminal. can do.

  FIG. 6 is a flowchart showing a step of determining whether to wake up or not according to an embodiment of the present invention.

  Here, a procedure when the group ID of the frame and the group ID of the ESL terminal do not match is shown.

  In FIG. 6, the MAC processing unit 620 can increase the failure variable (S610). The failure variable is information indicating the number of times that the group ID of the frame does not match the group ID of the ESL terminal. The MAC processing unit 620 can store failure variables.

  For example, the MAC processing unit can increase the failure variable by one when the group ID of the ESL terminal does not match the group ID of the received frame.

  According to an embodiment of the present invention, the MAC processing unit may compare the failure variable with the allowable failure information (S620).

  The allowable failure information is data in which a standard for forcibly wakeup the central processing unit of the ESL terminal is set. The allowable failure information may be preset data.

  For example, when the number of times set in the permissible failure information is larger than the failure variable of the MAC processing unit, the MAC processing unit can be switched to a sleep state (S630).

  However, if the failure variable of the MAC processing unit is larger than the number of times set in the allowable failure information, the MAC processing unit sets the forced wakeup variable to true and wakes up the central processing unit. Can do.

  The forced wakeup variable may indicate whether or not the ESL terminal is forced to wake up. For example, if the forced wakeup variable is set to true, the central processing unit 630 may be forced to wake up.

  According to an embodiment of the present invention, when the ESL terminal receives a frame including another group ID more than a preset number of times, the central processing unit 630 is forcibly waked up to determine whether there is an abnormality in the ESL terminal. be able to.

  FIG. 7 is a flowchart showing the steps performed by the central processing unit after wake-up.

  According to an embodiment of the present invention, the central processing unit may wake up through the above-described series of processes (S710).

  According to an embodiment of the present invention, the central processing unit may confirm whether to force wakeup (S720). For example, the central processing unit can confirm the value of the forced wakeup variable. When the value of the forced wakeup variable is set to true, the central processing unit is in a forced wakeup state.

  When the value of the forced wakeup variable is set to true, the central processing unit can delete the wakeup frame and reset the failure variable and the forced wakeup variable of the MAC processing unit (S730). ). This is because the central processing unit is in a state of being forced to wake up.

  If the value of the forced wakeup variable is not set to true, the central processing unit can read and delete the wakeup frame and reset the failure variable of the MAC processing unit (S740). ). This is because the central processing unit is normally waked up.

  With the above method, the ESL terminal according to the embodiment of the present invention can be driven with low power.

  The methods according to the embodiments of the invention described above can be used individually or in combination. Further, the steps of configuring each embodiment can be used individually or in combination with the steps of configuring other embodiments.

  The above description can be embodied in a recording medium that can be read by a computer or a similar device using, for example, software, hardware, or a combination thereof.

  According to hardware implementation, the above methods include: ASICs (application specific integrated circuits), DSPs (digital signal processors), DSPDs (digital signal processors), DSPDs (digital signal processors, PLs). At least one of a processor, a controller, a micro-controller, a microprocessor, and other electrical units for performing functions. It may be implemented using.

  According to a software implementation, the procedures and functions described in the present specification can be implemented by a separate software module. The software module may be implemented by software code written in an appropriate program language. The software code can be stored in a storage unit and can be executed by a processor.

  The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited thereto, and various modifications and changes can be made without departing from the technical idea of the present invention described in the claims. It will be apparent to those of ordinary skill in the art that variations are possible.

610 Wireless communication unit 620 MAC processing unit 630 Central processing unit

Claims (11)

The MAC processing unit obtains a frame by the gateway;
Determining whether it is a wake-up frame and updating a wake-up variable of the MAC processing unit;
A method for controlling an ESL terminal, comprising: waking up a central processing unit based on a group ID of the wakeup frame. Updating the wakeup variable includes
2. The method of controlling an ESL terminal according to claim 1, further comprising: comparing a wakeup variable of the wakeup frame with a wakeup variable of the MAC processing unit when the frame received by the MAC processing unit is a wakeup frame. Updating the wakeup variable includes
The method of controlling an ESL terminal according to claim 1 or 2, wherein when the frame received by the MAC processing unit is not a wake-up frame, the MAC processing unit is switched to a sleep state. The step of waking up the central processing unit based on the group ID of the wakeup frame is as follows:
If the group ID (Group ID) of the wake-up frame is different from the ID of the MAC processing unit, increasing the failure variable of the MAC processing unit;
The method of controlling an ESL terminal according to any one of claims 1 to 3, further comprising a step of comparing the failure variable with allowable failure information. The step of comparing the failure variable and allowable failure information includes:
The method of controlling an ESL terminal according to claim 4, wherein when the failure variable is smaller than the allowable failure information, the MAC processing unit is switched to a sleep state. The step of comparing the failure variable and allowable failure information includes:
The method of controlling an ESL terminal according to claim 4 or 5, wherein if the failure variable is larger than the allowable failure information, the forced wakeup variable is set to true and the central processing unit is woken up.   The method of controlling an ESL terminal according to any one of claims 1 to 6, further comprising a step of reading a wakeup frame based on a set value of a forced wakeup variable. A wireless communication unit for receiving a predetermined frame by the gateway;
A MAC processor that determines whether the received frame is a wakeup frame and updates a wakeup variable;
A central processing unit that wakes up based on a group ID of the wakeup frame. The MAC processing unit
The ESL terminal according to claim 8, wherein when the group ID of the wakeup frame is different from the ID of the MAC processing unit, the failure variable of the MAC processing unit is increased and the failure variable is compared with the allowable failure information. . The MAC processing unit
The ESL terminal according to claim 9, wherein the ESL terminal is switched to a sleep state when the failure variable is smaller than the allowable failure information. The MAC processing unit
The ESL terminal according to claim 9 or 10, wherein when the failure variable is larger than the allowable failure information, the forced wakeup variable is set to true and the central processing unit is woken up.

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