CN110166967B - Data communication method and system of electronic shelf label and related components - Google Patents
Data communication method and system of electronic shelf label and related components Download PDFInfo
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- CN110166967B CN110166967B CN201910463588.7A CN201910463588A CN110166967B CN 110166967 B CN110166967 B CN 110166967B CN 201910463588 A CN201910463588 A CN 201910463588A CN 110166967 B CN110166967 B CN 110166967B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/35—Services specially adapted for particular environments, situations or purposes for the management of goods or merchandise
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/11—Allocation or use of connection identifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/40—Connection management for selective distribution or broadcast
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application discloses a data communication method of electronic shelf labels, which comprises the steps of calling a wireless receiving and transmitting device to send awakening data packets to all electronic shelf labels in a wireless working mode when receiving a data transmission instruction sent by a server so as to awaken the electronic shelf labels; receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode, and establishing communication connection with a target electronic shelf label according to the broadcast; and carrying out data communication with the target electronic shelf label in the Bluetooth working mode. According to the electronic shelf label and the data communication method, the data communication efficiency of the main-end equipment and the electronic shelf label can be improved, and the power consumption of the electronic shelf label is reduced. The application also discloses a data communication system of the electronic shelf label, a computer readable storage medium, a communication main end and the electronic shelf label, which have the beneficial effects.
Description
Technical Field
The invention relates to the technical field of Internet of things, in particular to a data communication method and system of an electronic shelf label, a computer readable storage medium, a communication main terminal and the electronic shelf label.
Background
An Electronic Shelf Label (ESL) is a brand new generation of multi-stable electronic display device which is placed on a Shelf and can replace a traditional paper price label and a TN (twisted nematic) type liquid crystal display screen. The electronic shelf label brings the shelf into a computer program, so that the condition of manually replacing the price label is avoided, and the price consistency between the cashier desk and the shelf is realized.
The electronic shelf label has the following working states: sleep, broadcast, establish connection, and data communication. Correspondingly, the main end has the following working states: monitoring electronic shelf label broadcasting, awakening the electronic shelf label, connecting the electronic shelf label and data communication. Because the electronic shelf labels are generally powered by batteries and usually need to work for several years, the requirement on power consumption is high, the general quantity is large, the main end is required to be capable of responding quickly, each electronic shelf label can complete the communication process quickly, the high requirement on the design of the electronic shelf labels and the main end equipment is provided, and several working states can be switched quickly so as to complete each step of operation quickly.
One main-end device can correspond to a plurality of electronic shelf labels, the main-end device needs to continuously switch the working state and awaken each label one by one to complete communication operation, and therefore the response speed and the working state switching speed of the main-end device become the bottleneck of the whole system. In the related art, the master device and the electronic shelf label always work in a Bluetooth mode, and due to limitation of a Bluetooth Low Energy (BLE) protocol stack, a communication process between the master device and the electronic shelf label is long, and power consumption of the electronic shelf label is increased.
Therefore, how to improve the data communication efficiency between the master device and the electronic shelf label and reduce the power consumption of the electronic shelf label is a technical problem that needs to be solved by those skilled in the art at present.
Disclosure of Invention
The application aims to provide a data communication method and system of an electronic shelf label, a computer readable storage medium, a communication main end and the electronic shelf label, which can improve the data communication efficiency of main end equipment and the electronic shelf label and reduce the power consumption of the electronic shelf label.
In order to solve the above technical problem, the present application provides a data communication method for an electronic shelf label, which is applied to a communication master, and the data communication method includes:
when a data transmission instruction sent by a server is received, calling a wireless receiving and sending device to send awakening data packets to all electronic shelf labels in a wireless working mode so as to awaken the electronic shelf labels;
receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode, and establishing communication connection with a target electronic shelf label according to the broadcast;
and carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
Optionally, the establishing a communication connection with a target electronic shelf label according to the broadcast includes:
sending the broadcast to the server so that the server can determine the target electronic shelf label according to the broadcast;
and receiving the tag ID of the target electronic shelf tag sent by the server, and establishing communication connection with the target electronic shelf tag according to the tag ID.
Optionally, the communication master includes a first master device, a second master device, and a third master device;
the first main end equipment is used for calling the wireless receiving and transmitting device to send awakening data packets to all electronic shelf labels in a wireless working mode when receiving a data transmission instruction sent by the server so as to awaken the electronic shelf labels; the second main end equipment is used for receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the third main end equipment is used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
Optionally, the communication master includes a fourth master device and a fifth master device;
the fourth main-end equipment is used for calling the wireless receiving and transmitting device to send awakening data packets to all electronic shelf labels in a wireless working mode when receiving a data transmission instruction sent by the server so as to awaken the electronic shelf labels; the fifth main end device is used for receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the second main end equipment is also used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
The application also provides a data communication system of electronic shelf label, is applied to the communication main terminal, and this data communication system includes:
the awakening module is used for calling the wireless receiving and transmitting device to send awakening data packets to all electronic shelf labels in a wireless working mode when receiving a data transmission instruction sent by the server so as to awaken the electronic shelf labels;
the broadcast scanning module is used for receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode;
the main terminal communication module is used for establishing communication connection with a target electronic shelf label according to the broadcast; and the Bluetooth module is also used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
The application also provides a data communication method of the electronic shelf label, which is applied to the electronic shelf label and comprises the following steps:
when the state of the tag is detected to be a dormant state, calling a wireless receiving and transmitting device to receive a wake-up data packet sent by a communication main terminal in a wireless working mode;
judging whether the label state is switched from a dormant state to an awakening state;
if so, sending a broadcast to the communication master end in a Bluetooth working mode so as to establish communication connection with the communication master end;
and carrying out data communication with the communication master terminal in the Bluetooth working mode.
The present application further provides a data communication system of an electronic shelf label, which is applied to the electronic shelf label, and the data communication system includes:
the wake-up detection module is used for calling the wireless receiving and transmitting device to receive a wake-up data packet sent by the communication main terminal in a wireless working mode when the state of the tag is detected to be a dormant state;
the judging module is used for judging whether the label state is switched from a dormant state to an awakening state;
the connection module is used for sending broadcast to the communication main end in a Bluetooth working mode when the tag state is switched from a dormant state to an awakening state so as to establish communication connection with the communication main end;
and the tag communication module is used for carrying out data communication with the communication master terminal in the Bluetooth working mode.
The present application further provides a computer-readable storage medium having stored thereon a computer program, which when executed performs the steps of the above-described data communication method applied to a communication master and/or to an electronic shelf label of an electronic shelf label.
The application also provides a communication main end, which comprises a wireless data transceiver, a memory and a processor, wherein the wireless data transceiver is used for carrying out data communication with the electronic shelf label, a computer program is stored in the memory, and the processor realizes the step of executing the data communication method of the electronic shelf label when calling the computer program in the memory.
The application also provides an electronic shelf label, which comprises a wireless data transceiver, a memory and a processor, wherein the wireless data transceiver is used for carrying out data communication with the electronic shelf label, the memory stores a computer program, and the processor realizes the execution of the data communication method of the electronic shelf label when calling the computer program in the memory.
The application provides a data communication method of an electronic shelf label, which is applied to a communication main end and comprises the following steps: when a data transmission instruction sent by a server is received, calling a wireless receiving and sending device to send awakening data packets to all electronic shelf labels in a wireless working mode so as to awaken the electronic shelf labels; receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode, and establishing communication connection with a target electronic shelf label according to the broadcast; and carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
When the communication main end needs to send the awakening data packet, the working mode of the communication main end is set to be the wireless working mode, and the wireless receiving and sending device is directly called to send the awakening data packet to all electronic shelf labels in the wireless working mode. Because the wireless receiving and sending device is directly called to send the awakening data packet in the wireless working mode without being limited by the Bluetooth low energy consumption protocol stack, the scanning period of the electronic shelf label can be shortened, and the power consumption of the electronic shelf label is obviously reduced. The Bluetooth mode is convenient for carry out complicated data communication, therefore this application is after sending the awakening data package to electronic shelf label, and this application sets up the mode of communication owner end into the Bluetooth mode of operation, receives the broadcast under the Bluetooth mode of operation, establishes connection and carries out data communication. According to the electronic shelf label and the data communication method, the data communication efficiency of the main-end equipment and the electronic shelf label can be improved, and the power consumption of the electronic shelf label is reduced. The application also provides a data communication system of the electronic shelf label, a computer readable storage medium, a communication main end and the electronic shelf label, and the data communication system, the computer readable storage medium, the communication main end and the electronic shelf label have the beneficial effects, and are not repeated herein.
Drawings
In order to more clearly illustrate the embodiments of the present application, the drawings needed for the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a flowchart of a data communication method of an electronic shelf label according to an embodiment of the present application;
fig. 2 is a flowchart of another data communication method for an electronic shelf label according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a data communication system of an electronic shelf label according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a data communication system of an electronic shelf label according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a flowchart of a data communication method of an electronic shelf label according to an embodiment of the present application.
The specific steps may include:
s101: when a data transmission instruction sent by a server is received, calling a wireless receiving and sending device to send awakening data packets to all electronic shelf labels in a wireless working mode so as to awaken the electronic shelf labels;
the embodiment can be applied to a communication main end of an electronic shelf label system, and the communication main end can be equipment provided with a wireless communication module so as to perform information interaction with an electronic shelf label based on the wireless communication module. The wireless communication module can be a Bluetooth module, a Wi-Fi module and the like. The electronic shelf label system can comprise a server, a communication main end connected with the server through a gateway device and an electronic shelf label.
It should be noted that the communication master end applied in this embodiment may be a generic term of a plurality of master end devices, that is, a plurality of master end devices may exist in the electronic shelf label system, and each master end device may communicate with a plurality of electronic shelf labels.
Before this step, there may be an operation in which the server sends a data transmission instruction to the communication master through the gateway device. In order to reduce power consumption, the electronic shelf label is usually in a dormant state when the electronic shelf label does not perform data interaction with the communication master, and therefore the communication master needs to wake up the electronic shelf label in the dormant state before performing data communication with the electronic shelf label.
It should be noted that, in this embodiment, when the electronic shelf label is in the sleep state, the working mode of the electronic shelf label is the wireless working mode, that is, the wireless data transceiver is directly called to scan the wake-up data packet; further, in this embodiment, the specific manner of sending the wake-up packet to the electronic shelf label at the communication master end is as follows: and directly calling the wireless data transceiver to send a wake-up data packet in the wireless working mode.
It can be understood that, in the related art, the main communication terminal needs to be limited by a Bluetooth Low Energy (BLE) protocol stack when sending the wake-up packet in the Bluetooth mode, that is, both the sending period of the main communication terminal and the scanning period of the electronic shelf label are limited by the Bluetooth Low Energy protocol stack, which results in a Low wake-up efficiency of the electronic shelf label and increases the power consumption of the electronic shelf label. Shortening the scanning cycle corresponds to reducing the time period for the electronic shelf label to perform the scanning operation, and thus can reduce power consumption. In this embodiment, the communication master sets the working mode to the wireless working mode, and can directly invoke the underlying wireless transceiver to send the wakeup data packet without being limited by the bluetooth low energy protocol stack.
Furthermore, the wake-up data packet may have a plurality of identification codes of the electronic shelf label, and after the electronic shelf label receives the wake-up data packet, it is determined whether the identification code of the electronic shelf label is in the wake-up data packet, and if so, the electronic shelf label may be switched from the sleep state to the wake-up state. After the electronic shelf label is awakened, a broadcast can be sent to inform the communication main end that the communication main end is activated.
S102: receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode, and establishing communication connection with a target electronic shelf label according to the broadcast;
the communication main end receives the broadcast sent by the electronic shelf label in the Bluetooth working mode after awakening the electronic shelf label so as to determine the awakened electronic shelf label. Since the wireless working mode is inconvenient for performing complex data communication, and the bluetooth working mode can quickly establish communication connection and data communication, the communication master end of the embodiment switches the working mode to the bluetooth working mode after waking up the electronic shelf label.
As a possible implementation, the step of establishing a communication connection with the target electronic shelf label according to the broadcast in S102 may include the following operations:
step 1: sending the broadcast to the server so that the server can determine the target electronic shelf label according to the broadcast;
step 2: and receiving the tag ID of the target electronic shelf tag sent by the server, and establishing communication connection with the target electronic shelf tag according to the tag ID.
S103: and carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
As a possible implementation manner, after the communication master receives the broadcast, the broadcast of the electronic shelf label may be forwarded to the server, and the server determines the data to be sent to each awakened electronic shelf label or the data to be sent by the electronic shelf label, so as to complete the data communication.
In this embodiment, when the communication master needs to send the wake-up packet, the working mode of the communication master is set to the wireless working mode, and the wireless transceiver is directly called to send the wake-up packet to all the electronic shelf tags in the wireless working mode. Because the wireless receiving and sending device is directly called to send the awakening data packet in the wireless working mode without being limited by the Bluetooth low energy consumption protocol stack, the scanning period of the electronic shelf label can be shortened, and the power consumption of the electronic shelf label is obviously reduced. The bluetooth mode is convenient for carry out complicated data communication, and therefore this embodiment sets up the mode of communication owner end to bluetooth mode after sending the awakening data package to electronic shelf label, receives the broadcast under bluetooth mode, establishes connection and carries out data communication. According to the embodiment, the data communication efficiency of the main-end equipment and the electronic shelf label can be improved, and the power consumption of the electronic shelf label is reduced.
As a further supplement to the corresponding embodiment of fig. 1, the communication master may include a plurality of master devices, each master device may have its corresponding division of labor, and the specific communication master includes the following three types of devices: the system comprises a first main end device, a second main end device and a third main end device; the first main end equipment is used for calling the wireless receiving and transmitting device to send awakening data packets to all electronic shelf labels in a wireless working mode when receiving a data transmission instruction sent by the server so as to awaken the electronic shelf labels; the second main end equipment is used for receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the third main end equipment is used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
For example, there are A, B and C main end devices, where main end a works in wireless mode and is specially responsible for waking up the electronic shelf label, main end B works in bluetooth mode and is specially responsible for scanning the broadcast of the electronic shelf label, and main end C works in bluetooth mode and is specially responsible for establishing connection with the electronic shelf label and completing data communication. The working mode state of each main end is determined by a control instruction from the server. And each electronic shelf label has two working modes of wireless and bluetooth, three states of dormancy, broadcast, connection and communication, and is decided by the rotation of the working state machine of the label. Typically in a sleep state, with low power consumption, the wake-on-air signal is periodically scanned, for example, every 5 seconds for 10 milliseconds. Therefore, the main end equipment which works in a wireless state and is responsible for awakening the electronic shelf label needs to ensure that the awakening signal is continuously and periodically sent within the scanning period of the electronic shelf label, such as continuous 5 seconds, and the period is not more than the scanning time of the electronic shelf label. The wake-up signal is designed in two ways, one is at a designated position of the wireless data packet and contains designated specific content, such as device ID or device MAC, etc., and the other is that all or part of the content of the wireless data packet conforms to a specific rule. As long as one of the wake-up signals meets the requirement, the electronic shelf label is wakened up, then enters a Bluetooth mode, starts to enter a broadcast state, and waits for the connection of the main-end equipment.
The supplement is equivalent to dividing the data communication process of the communication main end and the electronic shelf label into three stages of awakening, connection and communication, and each type of main end equipment can correspond to one stage. That is to say, the first master end device, the second master end device and the third master end device work alternately, and the efficiency of data communication is improved.
As a further supplement to the corresponding embodiment of fig. 1, the communication master may include a plurality of master devices, each master device may have its corresponding division of labor, and the specific communication master includes the following 2 types of devices: a fourth master device and a fifth master device; the fourth main-end equipment is used for calling the wireless receiving and transmitting device to send awakening data packets to all electronic shelf labels in a wireless working mode when receiving a data transmission instruction sent by the server so as to awaken the electronic shelf labels; the fifth main end device is used for receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the fifth master end device is also used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
Of course, the combination strategy of each master device in the communication master can also be flexibly adjusted according to the actual application situation, and is not specifically limited herein. Further, on the master end device, the working mode and the working state of each master end device may be changed at any time by a control instruction from the server or the gateway, and may also be in a specific mode or a specific working state all the time.
Referring to fig. 2, fig. 2 is a flowchart of another data communication method for an electronic shelf label according to an embodiment of the present application.
The specific steps may include:
s201: when the state of the tag is detected to be a dormant state, calling a wireless receiving and transmitting device to receive a wake-up data packet sent by a communication main terminal in a wireless working mode;
s202: judging whether the label state is switched from a dormant state to an awakening state; if yes, entering S203;
s203: sending a broadcast to the communication master in a Bluetooth working mode so as to establish a communication connection with the communication master;
s204: and carrying out data communication with the communication master terminal in the Bluetooth working mode.
The above embodiment is a data communication mode of one electronic shelf label in the embodiment corresponding to fig. 1, and a plurality of electronic shelf labels described in this embodiment may exist in an electronic shelf label system. When the electronic shelf label is in a dormant state, the electronic shelf label directly calls the wireless transceiver to receive the awakening data, after the awakening data packet is received, the electronic shelf label can have the operation of judging whether the awakening data packet comprises the identification code of the electronic shelf label, and if the electronic shelf label exists, the label state is switched from the dormant state to the awakening state. Because the electronic shelf label of the embodiment calls the wireless transceiver to receive the awakening data packet in the wireless working mode, the period for scanning the awakening data packet can be shortened, and the electronic shelf label is not limited by a Bluetooth low-energy-consumption protocol stack. When the tag state is switched to the wakeup state, the embodiment sends a broadcast, establishes an online and performs data communication in the bluetooth working mode, and improves the efficiency of data transmission by using the characteristic of bluetooth transmission. According to the embodiment, the data communication efficiency of the main-end equipment and the electronic shelf label can be improved, and the power consumption of the electronic shelf label is reduced.
The flow described in the above embodiment is explained below by an embodiment in practical use.
Two working modes, namely a wireless working mode and a Bluetooth working mode, are respectively designed for the main-end equipment and the electronic shelf label. The wireless working mode can directly operate the 2.4GHz transceiver module to transmit and receive data, and the Bluetooth working mode indirectly operates the 2.4GHz transceiver module to transmit and receive data through a BLE (Bluetooth low energy) protocol stack module. The wireless working mode can realize quick response, but is not convenient for more complex data communication, and the Bluetooth working mode is just the opposite. The two working modes can be freely switched according to requirements.
And the main-end equipment completes the operation of awakening the electronic shelf label in a wireless working mode. And in the Bluetooth working mode, the broadcasting scanning and processing of the electronic shelf label are completed, the connection with the electronic shelf label is established, and data communication is carried out.
The electronic shelf label completes awakening monitoring in a wireless working mode, and activates the electronic shelf label when an awakening signal aiming at the electronic shelf label is monitored, and the working mode is switched to a Bluetooth mode. And in the Bluetooth working mode, broadcasting, connection processing and data communication are completed.
In order to improve the system performance, rapidly wake up all electronic shelf labels, rapidly complete all communication operations, and fully utilize the advantage that the master end equipment can freely switch the working mode, a plurality of master end equipment can be divided into work, and the following execution strategies are provided:
strategy 1, dividing at least three main terminals into work, wherein one main terminal is specially responsible for awakening an electronic shelf label in a wireless working mode, the other main terminal is specially responsible for broadcast scanning processing in a Bluetooth working mode, and the other main terminal is specially responsible for data communication in the Bluetooth working mode;
strategy 2, part of the main end equipment works in a centralized manner under the wireless module to be responsible for completing awakening of all electronic shelf labels, and the other main end equipment works in a centralized manner under a Bluetooth working mode to complete broadcast scanning processing of the electronic shelf labels and establish connection and data communication;
strategy 3, starting to work partially or completely in a wireless working mode to wake up all the electronic shelf labels, and switching the working mode to a Bluetooth working mode to complete the broadcast scanning processing of the electronic shelf labels and establish connection and data communication;
through above-mentioned embodiment, electronic shelf label and main end equipment all design two kinds of mode of wireless and bluetooth, use a plurality of main ends to correspond same batch of electronic shelf label moreover simultaneously. In the wireless working mode, the period of the scanning wake-up signal can be shortened to 10 milliseconds, even shorter, and the power consumption of the electronic shelf label can be obviously reduced. The main end equipment can wake up all the electronic shelf labels in the shortest time, respond to the broadcast of the electronic shelf labels in the shortest time, complete the data communication operation with all the electronic shelf labels in the shortest time, and the time from the wake-up of the electronic shelf labels to the completion of the data communication is shortest, so that the power consumption is reduced to the lowest.
It can be understood that, when the communication master described in the embodiment corresponding to fig. 1 and the electronic shelf tags described in the embodiments corresponding to fig. 2 exist in the electronic shelf tag system, the communication master can implement fast response to shorten the overall communication processing time, so as to achieve the optimal overall performance of the system; the scanning period of the electronic shelf label can be shortened, the power consumption is obviously reduced, and the service life of the electronic shelf label battery is prolonged.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a data communication system of an electronic shelf label according to an embodiment of the present application, where the system is applied to a communication master, and may include:
the wake-up module 110 is configured to, when receiving a data transmission instruction sent by a server, invoke a wireless transceiver to send a wake-up data packet to all electronic shelf tags in a wireless working mode, so as to wake up the electronic shelf tags;
a broadcast scanning module 120, configured to receive a broadcast sent by the electronic shelf label in a bluetooth operating mode;
and a master communication module 130, configured to establish a communication connection with a target electronic shelf label according to the broadcast, and further configured to perform data communication with the target electronic shelf label in the bluetooth working mode.
In this embodiment, when the communication master needs to send the wake-up packet, the working mode of the communication master is set to the wireless working mode, and the wireless transceiver is directly called to send the wake-up packet to all the electronic shelf tags in the wireless working mode. Because the wireless receiving and sending device is directly called to send the awakening data packet in the wireless working mode without being limited by the Bluetooth low energy consumption protocol stack, the scanning period of the electronic shelf label can be shortened, and the power consumption of the electronic shelf label is obviously reduced. The bluetooth mode of operation is convenient for carry out complicated data communication, and therefore this embodiment sets up the mode of communication owner end into bluetooth mode of operation after sending the awakening data package to electronic shelf label, receives the broadcast under bluetooth mode of operation, establishes connection and carries out data communication. According to the embodiment, the data communication efficiency of the main-end equipment and the electronic shelf label can be improved, and the power consumption of the electronic shelf label is reduced.
Further, the broadcast scanning module 120 includes:
the broadcast receiving unit is used for receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode;
a broadcast sending unit, configured to send the broadcast to the server, so that the server determines the target electronic shelf label according to the broadcast;
and the connecting unit is used for receiving the tag ID of the target electronic shelf tag sent by the server and establishing communication connection with the target electronic shelf tag according to the tag ID.
Further, the communication master comprises a first master device, a second master device and a third master device;
the first main end equipment is used for calling the wireless receiving and transmitting device to send awakening data packets to all electronic shelf labels in a wireless working mode when receiving a data transmission instruction sent by the server so as to awaken the electronic shelf labels; the second main end equipment is used for receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the third main end equipment is used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
Further, the communication master comprises a fourth master device and a fifth master device;
the fourth main-end equipment is used for calling the wireless receiving and transmitting device to send awakening data packets to all electronic shelf labels in a wireless working mode when receiving a data transmission instruction sent by the server so as to awaken the electronic shelf labels; the fifth main end device is used for receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the second main end equipment is also used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a data communication system of an electronic shelf label according to an embodiment of the present application, where the system is applied to an electronic shelf label, and may include:
the wakeup detection module 210 is configured to, when it is detected that the tag state is the dormant state, invoke the wireless transceiver to receive a wakeup data packet sent by the communication master in the wireless working mode;
the judging module 220 is configured to judge whether the tag state is switched from a dormant state to an awake state;
a connection module 230, configured to send a broadcast to the communication master in a bluetooth working mode when the tag state is switched from the dormant state to the awake state, so as to establish a communication connection with the communication master;
and the tag communication module 240 is configured to perform data communication with the communication master in the bluetooth operating mode.
When the electronic shelf label is in a dormant state, the electronic shelf label directly calls the wireless transceiver to receive the awakening data, after the awakening data packet is received, the electronic shelf label can have the operation of judging whether the awakening data packet comprises the identification code of the electronic shelf label, and if the electronic shelf label exists, the label state is switched from the dormant state to the awakening state. Because the electronic shelf label of the embodiment calls the wireless transceiver to receive the awakening data packet in the wireless working mode, the period for scanning the awakening data packet can be shortened, and the electronic shelf label is not limited by a Bluetooth low-energy-consumption protocol stack. In the embodiment, the switching of the tag state to the wakeup state is to send a broadcast, establish an online and perform data communication in the bluetooth working mode, and the efficiency of data transmission is improved by using the characteristic of bluetooth transmission. According to the embodiment, the data communication efficiency of the main-end equipment and the electronic shelf label can be improved, and the power consumption of the electronic shelf label is reduced.
Since the embodiment of the system part corresponds to the embodiment of the method part, the embodiment of the system part is described with reference to the embodiment of the method part, and is not repeated here.
The present application also provides a computer readable storage medium having stored thereon a computer program which, when executed, may implement the steps provided by the above-described embodiments. The storage medium may include: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The application also provides a communication main end, which comprises a wireless data transceiver, a memory and a processor, wherein the wireless data transceiver is used for carrying out data communication with the electronic shelf label, the memory stores a computer program, and the processor can realize the steps provided by the embodiment when calling the computer program in the memory. Of course, the communication master may also include various network interfaces, power supplies, and other components.
The application also provides an electronic shelf label, which comprises a wireless data transceiver, a memory and a processor, wherein the wireless data transceiver is used for carrying out data communication with the electronic shelf label, the memory stores a computer program, and the steps provided by the embodiment can be realized when the processor calls the computer program in the memory. Of course, the electronic shelf label may also include various network interfaces, power supplies and other components.
The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Claims (8)
1. A data communication method of an electronic shelf label is characterized by being applied to a communication main end and comprising the following steps:
when a data transmission instruction sent by a server is received, calling a wireless receiving and sending device to send awakening data packets to all electronic shelf labels in a wireless working mode so as to awaken the electronic shelf labels;
receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode, and establishing communication connection with a target electronic shelf label according to the broadcast;
performing data communication with the target electronic shelf label in the Bluetooth working mode;
wherein the establishing a communication connection with a target electronic shelf label according to the broadcast comprises:
sending the broadcast to the server so that the server can determine the target electronic shelf label according to the broadcast;
receiving the tag ID of the target electronic shelf tag sent by the server, and establishing communication connection with the target electronic shelf tag according to the tag ID;
the communication master end comprises first master end equipment, second master end equipment and third master end equipment; the first main end equipment is used for calling the wireless receiving and transmitting device to send the awakening data packet to all the electronic shelf labels in the wireless working mode when receiving a data transmission instruction sent by a server so as to awaken the electronic shelf labels; the second main end device is used for receiving the broadcast sent by the electronic shelf label in the Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the third main end equipment is used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
2. The data communication method according to claim 1, wherein the communication master comprises a fourth master device and a fifth master device;
the fourth main-end device is used for calling the wireless transceiver to send the awakening data packet to all electronic shelf labels in the wireless working mode when receiving a data transmission instruction sent by a server so as to awaken the electronic shelf labels; the fifth master end device is used for receiving the broadcast sent by the electronic shelf label in the Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the fifth master end device is also used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
3. A data communication system of an electronic shelf label is applied to a communication main end and comprises:
the awakening module is used for calling the wireless receiving and transmitting device to send awakening data packets to all electronic shelf labels in a wireless working mode when receiving a data transmission instruction sent by the server so as to awaken the electronic shelf labels;
the broadcast scanning module is used for receiving the broadcast sent by the electronic shelf label in a Bluetooth working mode;
the main terminal communication module is used for establishing communication connection with a target electronic shelf label according to the broadcast; the Bluetooth module is also used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode;
the process that the main-end communication module establishes communication connection with the target electronic shelf label according to the broadcast comprises the following steps: sending the broadcast to the server so that the server can determine the target electronic shelf label according to the broadcast; receiving the tag ID of the target electronic shelf tag sent by the server, and establishing communication connection with the target electronic shelf tag according to the tag ID;
the communication master end comprises first master end equipment, second master end equipment and third master end equipment; the first main end equipment is used for calling the wireless receiving and transmitting device to send the awakening data packet to all the electronic shelf labels in the wireless working mode when receiving a data transmission instruction sent by a server so as to awaken the electronic shelf labels; the second main end device is used for receiving the broadcast sent by the electronic shelf label in the Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the third main end equipment is used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
4. A data communication method of an electronic shelf label is characterized by being applied to the electronic shelf label and comprising the following steps:
when the state of the tag is detected to be a dormant state, calling a wireless receiving and transmitting device to receive a wake-up data packet sent by a communication main terminal in a wireless working mode;
judging whether the label state is switched from a dormant state to an awakening state;
if so, sending a broadcast to the communication master end in a Bluetooth working mode so as to establish communication connection with the communication master end;
carrying out data communication with the communication master terminal in the Bluetooth working mode;
the process that the communication main end establishes communication connection with the target electronic shelf label comprises the following steps: sending the broadcast to a server so that the server can determine the target electronic shelf label according to the broadcast; receiving the tag ID of the target electronic shelf tag sent by the server, and establishing communication connection with the target electronic shelf tag according to the tag ID;
the communication master end comprises first master end equipment, second master end equipment and third master end equipment; the first main end equipment is used for calling the wireless receiving and transmitting device to send the awakening data packet to all the electronic shelf labels in the wireless working mode when receiving a data transmission instruction sent by a server so as to awaken the electronic shelf labels; the second main end device is used for receiving the broadcast sent by the electronic shelf label in the Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the third main end equipment is used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
5. A data communication system of an electronic shelf label is characterized by being applied to the electronic shelf label and comprising:
the wake-up detection module is used for calling the wireless receiving and transmitting device to receive a wake-up data packet sent by the communication main terminal in a wireless working mode when the state of the tag is detected to be a dormant state;
the judging module is used for judging whether the label state is switched from a dormant state to an awakening state;
the connection module is used for sending broadcast to the communication main end in a Bluetooth working mode when the tag state is switched from a dormant state to an awakening state so as to establish communication connection with the communication main end;
the tag communication module is used for carrying out data communication with the communication master terminal in the Bluetooth working mode;
the process that the communication main end establishes communication connection with the target electronic shelf label comprises the following steps: sending the broadcast to a server so that the server can determine the target electronic shelf label according to the broadcast; receiving the tag ID of the target electronic shelf tag sent by the server, and establishing communication connection with the target electronic shelf tag according to the tag ID;
the communication master end comprises first master end equipment, second master end equipment and third master end equipment; the first main end equipment is used for calling the wireless receiving and transmitting device to send the awakening data packet to all the electronic shelf labels in the wireless working mode when receiving a data transmission instruction sent by a server so as to awaken the electronic shelf labels; the second main end device is used for receiving the broadcast sent by the electronic shelf label in the Bluetooth working mode and establishing communication connection with a target electronic shelf label according to the broadcast; and the third main end equipment is used for carrying out data communication with the target electronic shelf label in the Bluetooth working mode.
6. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the data communication method of an electronic shelf label according to any one of claims 1 to 2 and/or claim 4.
7. A communication master, comprising:
the wireless data transceiver is used for carrying out data communication with the electronic shelf label;
a memory for storing a computer program;
processor for implementing the steps of the data communication method of an electronic shelf label as claimed in claim 1 or 2 when executing said computer program.
8. An electronic shelf label, comprising:
the wireless data transceiver is used for carrying out data communication with the communication main terminal;
a memory for storing a computer program;
processor for implementing the steps of the data communication method of the electronic shelf label as claimed in claim 4 when executing the computer program.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910463588.7A CN110166967B (en) | 2019-05-30 | 2019-05-30 | Data communication method and system of electronic shelf label and related components |
| PCT/CN2020/083662 WO2020238423A1 (en) | 2019-05-30 | 2020-04-08 | Data communication method, system and related assemblies for electronic shelf label |
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| CN201910463588.7A CN110166967B (en) | 2019-05-30 | 2019-05-30 | Data communication method and system of electronic shelf label and related components |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110166967B (en) * | 2019-05-30 | 2022-04-15 | 深圳云里物里科技股份有限公司 | Data communication method and system of electronic shelf label and related components |
| CN110784858B (en) * | 2019-10-10 | 2023-05-09 | RealMe重庆移动通信有限公司 | Bluetooth device control method and device, electronic device and storage medium |
| CN111092631B (en) * | 2019-12-31 | 2021-10-19 | 成都麦杰康科技有限公司 | 433M communication system for realizing low power consumption |
| CN111355737B (en) * | 2020-03-04 | 2022-08-19 | 努比亚技术有限公司 | Electronic price tag communication method, gateway, server, system, device, and computer-readable storage medium |
| CN114339694A (en) * | 2020-09-30 | 2022-04-12 | 京东方科技集团股份有限公司 | Information configuration method of display device and display device |
| CN114885403A (en) * | 2021-01-18 | 2022-08-09 | Oppo广东移动通信有限公司 | IoT (Internet of things) equipment control method and device, UWB (ultra-wideband) tag and terminal equipment |
| EP4307775A1 (en) * | 2021-03-19 | 2024-01-17 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Operating method and apparatus for uwb tag, and uwb tag and storage medium |
| CN113163345B (en) * | 2021-03-23 | 2023-04-25 | 深圳云里物里科技股份有限公司 | Broadcast communication method, system, gateway equipment and electronic price tag |
| CN113141603B (en) * | 2021-04-09 | 2023-05-30 | 深圳云里物里科技股份有限公司 | Data communication method, system, master terminal device and slave terminal device |
| CN113543090A (en) * | 2021-05-14 | 2021-10-22 | 浙江大华技术股份有限公司 | Method, device and storage medium for reducing power consumption of Bluetooth receiving device |
| CN113283253B (en) * | 2021-06-18 | 2022-03-15 | 优荑众创实业（深圳）有限公司 | Data transmission method, electronic device and medium applied to article management system |
| CN115065930B (en) * | 2022-06-16 | 2024-03-19 | 上海乐橘碳蚁科技有限公司 | Tray stacking detection system and method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102693483A (en) * | 2012-05-02 | 2012-09-26 | 苏州佳世达电通有限公司 | Method and system for refreshing displayed picture of electronic shelf label |
| CN102708339A (en) * | 2012-03-02 | 2012-10-03 | 北京汉朔科技有限公司 | Dual-band communication method for electronic goods shelf label system |
| CN103345694A (en) * | 2013-06-07 | 2013-10-09 | 绿泰信息科技(上海)有限公司 | Electronic goods shelf label with multi-channel information display and system |
| CN105654155A (en) * | 2015-12-30 | 2016-06-08 | 苏州汉朗光电有限公司 | Dual-frequency order picking label system and label data update and label information feedback method |
| CN107682808A (en) * | 2017-09-22 | 2018-02-09 | 锐捷网络股份有限公司 | A kind of assets localization method, equipment and system |
| CN108989994A (en) * | 2018-07-13 | 2018-12-11 | 京东方科技集团股份有限公司 | A kind of data-updating method, electronic tag, control terminal and system |
| CN109587778A (en) * | 2019-01-18 | 2019-04-05 | 重庆物奇科技有限公司 | Communication means for electronics price tag |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140364061A1 (en) * | 2013-06-11 | 2014-12-11 | Jogtek Corp. | Wireless transmission apparatus with bluetooth and short distance communication |
| KR20150003041A (en) * | 2013-06-28 | 2015-01-08 | 삼성전기주식회사 | System for electronic shelf label and method of operating system for electronic shelf label |
| CN105115487B (en) * | 2015-05-18 | 2017-09-01 | 陈希 | Positioning navigation method in a kind of supermarket based on information fusion |
| US10506381B2 (en) * | 2017-06-11 | 2019-12-10 | Archetype SC, Inc. | Systems and methods for sensing and locating passive electronic devices |
| CN107820307A (en) * | 2017-10-11 | 2018-03-20 | 捷开通讯(深圳)有限公司 | Mobile device carries out electricity saving method, system and the device during radio communication |
| CN108334917B (en) * | 2018-01-30 | 2021-07-20 | 苏州汉朗光电有限公司 | Low-power consumption wireless electronic tag system based on LORA technology |
| CN108924197B (en) * | 2018-06-21 | 2020-12-22 | 京东数字科技控股有限公司 | Electronic price tag system and data communication method thereof |
| CN109547578B (en) * | 2019-01-18 | 2022-04-15 | 重庆物奇科技有限公司 | Networking method for electronic price tag system |
| CN110166967B (en) * | 2019-05-30 | 2022-04-15 | 深圳云里物里科技股份有限公司 | Data communication method and system of electronic shelf label and related components |
-
2019
- 2019-05-30 CN CN201910463588.7A patent/CN110166967B/en active Active
-
2020
- 2020-04-08 WO PCT/CN2020/083662 patent/WO2020238423A1/en active Application Filing
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708339A (en) * | 2012-03-02 | 2012-10-03 | 北京汉朔科技有限公司 | Dual-band communication method for electronic goods shelf label system |
| CN102693483A (en) * | 2012-05-02 | 2012-09-26 | 苏州佳世达电通有限公司 | Method and system for refreshing displayed picture of electronic shelf label |
| CN103345694A (en) * | 2013-06-07 | 2013-10-09 | 绿泰信息科技(上海)有限公司 | Electronic goods shelf label with multi-channel information display and system |
| CN105654155A (en) * | 2015-12-30 | 2016-06-08 | 苏州汉朗光电有限公司 | Dual-frequency order picking label system and label data update and label information feedback method |
| CN107682808A (en) * | 2017-09-22 | 2018-02-09 | 锐捷网络股份有限公司 | A kind of assets localization method, equipment and system |
| CN108989994A (en) * | 2018-07-13 | 2018-12-11 | 京东方科技集团股份有限公司 | A kind of data-updating method, electronic tag, control terminal and system |
| CN109587778A (en) * | 2019-01-18 | 2019-04-05 | 重庆物奇科技有限公司 | Communication means for electronics price tag |
Also Published As
| Publication number | Publication date |
|---|---|
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| WO2020238423A1 (en) | 2020-12-03 |
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