CN107708181B - Data communication system, electronic shelf label system and communication method thereof - Google Patents

Data communication system, electronic shelf label system and communication method thereof Download PDF

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Publication number
CN107708181B
CN107708181B CN201711000827.2A CN201711000827A CN107708181B CN 107708181 B CN107708181 B CN 107708181B CN 201711000827 A CN201711000827 A CN 201711000827A CN 107708181 B CN107708181 B CN 107708181B
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esl
information
message
display
address
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CN107708181A (en
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丁磊
冯永晋
张海笑
江志文
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Guangdong Bluebee Information Technology Co ltd
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Foshan Innovation Convergence Technology Co ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/10—Access restriction or access information delivery, e.g. discovery data delivery using broadcasted information
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisions for transferring data to distant stations, e.g. from a sensing device
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/55—Push-based network services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • 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
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a data communication system, an electronic shelf label system and a communication method thereof. The communication method of the communication system comprises the following steps: and according to the destination ESL address, after scanning out the corresponding ESL, sending a service request to the ESL, and sending the display message to the ESL for updating the display content. The ESLS includes a data push source, an ESL server, a wireless access device, and an ESL. The communication method of the ESLS comprises the following steps: when the commodity information needs to be updated, sending the commodity information message to an ESL server and then forwarding the message to the wireless access equipment; and the wireless access equipment sends a service request to the ESL after scanning out the corresponding ESL according to the destination ESL address, and sends a display message to the ESL to update the display content. The invention can improve the stability, reliability and communication processing efficiency of ESLS, and make ESL achieve the effects of low power consumption operation and electricity saving, and can be widely applied in the technical field of ESL.

Description

Data communication system, electronic shelf label system and communication method thereof
Technical Field
The present invention relates to communication technologies for electronic shelf label systems, and in particular, to a data communication system, an electronic shelf label system, and a communication method thereof.
Background
Explanation of technical words:
AP: a wireless access point, referred to as AP access device for short.
ESL: electronic Shelf Label (ESL) and Electronic Shelf Label (ESL) are used for short.
ESLS: an electronic shelf label system.
ESL Server: an ESL server.
UUID: universal Unique Identifier.
Traditional retail uses paper price labels to display the price of an item. In modern supermarkets or retail markets, due to the factors of price change requirements caused by various and frequent sales promotion activities, time delay and errors of manual price tag modification and the like, the defects of paper price tags in the aspects are more and more obvious, so that the price tagging of commodities becomes a complex system and huge work. However, due to industry competition, upstream industry changes, etc., the price of the product must be frequently adjusted and changed to better occupy the market and sell the product, and once the price fluctuates or sales promotion is needed, the paper price label needs to be manually replaced and the accounting price needs to be changed in the accounting system. Therefore, the traditional mode has many disadvantages for super-large markets with larger and larger scales, such as error price updating, updating delay, rapid and flexible change, large workload, low working efficiency and the like. Therefore, in order to solve these problems, an electronic shelf label system, i.e., an ESL system, has appeared.
At present, a common ESL system architecture is a three-layer or four-layer system composed of a data push source, an ESL Server (ESL Server), an AP access device and an ESL, and the data push source or the ESL Server is used as a Server and the AP access device and the ESL are used as a client, so as to implement a corresponding data communication update process.
Generally, to save its own power, the ESL is mostly in a sleep state, and the sleep state is controlled by ESLServer through the AP access device, or is implemented by setting a fixed sleep time. When the access equipment is in a dormant state, the ESL cannot work, after the dormancy is finished, the ESL sends a request to the AP access equipment, then the AP access equipment sends a request corresponding to the ESL Server, then the ESL Server inquires whether corresponding service is needed to be provided for the ESL, if so, data of the corresponding service is sent to the corresponding ESL through the AP access equipment, otherwise, the corresponding ESL is informed of no service. It can be seen that, such a communication manner is easy to generate a large amount of invalid queries, which not only increases the burden of the ESL server and increases the service delay of the ESL with a real service demand, but also causes the ESL with a service demand to be unable to obtain service due to various exception handling, resulting in low reliability, stability and working efficiency of the ESL system, and also increases useless power consumption of the ESL, resulting in short service life of the battery of the ESL itself, requiring frequent replacement of a new ESL, and increasing investment cost.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a data communication system, an electronic shelf label system and a communication method thereof applied to ESLS, which can improve stability, reliability and work efficiency of communication and enable ESLS to operate with low power consumption.
The first technical scheme adopted by the invention is as follows: a data communication system for use in ESLS, the system comprising:
the wireless access equipment serving as the client is used for scanning the broadcast ESL information according to the target ESL address after receiving the commodity information message; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL corresponding to the ESL address, and sending the display message to the corresponding ESL; the commodity information message refers to a commodity information message generated according to commodity updating information after commodity information needing to be updated is detected, and the display message refers to a display message generated according to the commodity information message;
the ESL is used as a server side and used for broadcasting ESL information; after receiving the display message, updating the display content according to the display message;
the wireless access equipment is in communication connection with the ESL.
The second technical scheme adopted by the invention is as follows: a communication method of a data communication system, applied in ESLS, the method comprising the steps of:
ESL serving as a server side broadcasts ESL information;
after receiving the commodity information message, the wireless access equipment serving as the client scans the broadcast ESL information according to the destination ESL address, and sends a writing service request to the ESL corresponding to the ESL address after the ESL address contained in the scanned ESL information is matched with the destination ESL address, so that the display message is sent to the corresponding ESL; the commodity information message refers to a commodity information message generated according to commodity updating information after commodity information needing to be updated is detected, and the display message refers to a display message generated according to the commodity information message;
and after receiving the display message, the ESL serving as the server updates the display content according to the display message.
The third technical scheme adopted by the invention is as follows: an electronic shelf label system, the system comprising:
the data pushing source is used for generating a corresponding commodity information message according to the commodity updating information and then sending the commodity information message to the ESL server after detecting that the commodity information needs to be updated;
the ESL server is used for forwarding the commodity information message to the corresponding wireless access equipment after receiving the commodity information message;
at least one wireless access device as a client, which is used for scanning the ESL information broadcasted according to the destination ESL address after receiving the commodity information message; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL corresponding to the ESL address, and sending the display message to the corresponding ESL; the display message refers to a display message generated according to a commodity information message;
at least one ESL serving as a server for broadcasting ESL information; after receiving the display message, updating the display content according to the display message;
and the data pushing source is in communication connection with the ESL through the ESL server and the wireless access equipment in sequence.
The fourth technical scheme adopted by the invention is as follows: a method of communication of an electronic shelf label system, the method comprising the steps of:
ESL serving as a server side broadcasts ESL information;
after detecting that the commodity information needs to be updated, the data pushing source generates a corresponding commodity information message according to the commodity updating information and then sends the commodity information message to the ESL server;
after receiving the commodity information message, the ESL server forwards the commodity information message to corresponding wireless access equipment;
after receiving the commodity information message, the wireless access equipment serving as the client scans the broadcast ESL information according to the destination ESL address, and sends a writing service request to the ESL corresponding to the ESL address after the ESL address contained in the scanned ESL information is matched with the destination ESL address, so that the display message is sent to the corresponding ESL; the display message refers to a display message generated according to a commodity information message;
and after receiving the display message, the ESL serving as the server updates the display content according to the display message.
The system and the method have the advantages that: when the invention works, ESL as a service end broadcasts ESL information after the ESL finishes dormancy; when the commodity information is detected to be updated, generating a corresponding commodity information message according to the commodity updating information and then sending the commodity information message to the wireless access equipment; after receiving the commodity information message, the wireless access equipment serving as the client scans the broadcast ESL information according to the destination ESL address, and sends a writing service request to the ESL corresponding to the ESL address when the ESL address contained in the scanned ESL information is matched with the destination ESL address, namely sends the writing service request to the ESL sending the ESL information, so that the display message is sent to the corresponding ESL; after receiving the display message, the ESL serving as the server updates the display content according to the display message, so that the electronic shelf label system becomes an ESLS with network heterogeneity and asynchronous communication, the wireless access device serves as the client, and the ESL serves as the architecture module of the server to realize communication, thereby fully solving the problem caused by a large amount of invalid queries generated by the traditional ESLS, lightening the burden of an ESL server, reducing the service delay of the ESL, reducing the condition that the ESL cannot obtain services due to abnormal processing, greatly improving the stability, reliability and communication processing efficiency of the system, and simultaneously, because the ESL does not need to carry out remote service demand query to the ESL server, only needs to broadcast and provide services for the ESL information, compared with the traditional architecture mode, the ESL can run with low power consumption, The power-saving effect greatly improves the utilization rate of an ESL self battery, prolongs the service life of the SL self battery, reduces frequent replacement of the battery and reduces the input cost.
Drawings
Fig. 1 is a block diagram of a data communication system applied to ESLS in accordance with the present invention;
FIG. 2 is a flow chart of the steps of a communication method of a data communication system of the present invention;
FIG. 3 is a block diagram of an electronic shelf label system of the present invention;
FIG. 4 is a flow chart of the steps of a communication method of an electronic shelf label system of the present invention;
FIG. 5 is a block diagram of an embodiment of an electronic shelf label system of the present invention;
FIG. 6 is a data flow diagram of one embodiment of an electronic shelf label system of the present invention;
FIG. 7 is a schematic diagram of the structure of the communication profile of the ESL;
fig. 8 is a communication flow diagram of an AP access device requesting write service from an ESL;
fig. 9 is a communication flow diagram illustrating an AP access device requesting read service from an ESL.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
Example 1
As shown in fig. 1, a data communication system, which is applied in ESLS, includes:
the wireless access equipment serving as the client is used for scanning the broadcast ESL information according to the target ESL address after receiving the commodity information message; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL corresponding to the ESL address, and sending the display message to the corresponding ESL; the commodity information message refers to a commodity information message generated according to commodity updating information after commodity information needing to be updated is detected, and the display message refers to a display message generated according to the commodity information message;
the ESL is used as a server side and used for broadcasting ESL information; after receiving the display message, updating the display content according to the display message;
the wireless access equipment is in communication connection with the ESL. The number of the wireless access equipment and the number of the ESL are at least one.
Further as a preferred embodiment, the ESL is specifically used for broadcasting ESL information; and after the display message is received, updating the display content according to the display message, and after the update is completed, sending response feedback pushed by data update to the wireless access equipment.
Further as a preferred embodiment, the ESL is specifically used for broadcasting ESL information; and after the display message is received, updating the display content according to the display message, sending response feedback pushed by data updating to the wireless access equipment after the updating is finished, and then disconnecting the communication connection with the wireless access equipment.
Further, as a preferred embodiment, the wireless access device is specifically configured to scan the broadcasted ESL information according to the destination ESL address after receiving the commodity information message; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL corresponding to the ESL address, and sending the display message to the corresponding ESL; and sending a read service request to the ESL corresponding to the ESL address, and acquiring response feedback pushed by data update from the ESL.
Further as a preferred embodiment, the sending a write service request to the ESL corresponding to the ESL address, so as to send the display message to the corresponding ESL, includes:
sending the UUID to the ESL, and enabling the ESL to return corresponding first service information after receiving the UUID;
acquiring a first characteristic UUID from the returned first service information;
sending the first characteristic UUID to an ESL (electronic service level library), and enabling the ESL to return a corresponding first characteristic handle after receiving the first characteristic UUID;
according to the returned first characteristic handle, sending the setting information of the first configuration handle to the ESL for setting, enabling a characteristic value writing function of the ESL to be opened, and then returning first setting success information; the first configuration handle is a configuration handle for data writing;
and when the returned first setting success information is received, sending the data to be written to the ESL, thereby writing the data to the characteristic value of the ESL and enabling the ESL to receive the display message.
Further, as a preferred embodiment, the sending a read service request to the ESL corresponding to the ESL address, and obtaining response feedback pushed by data update from the ESL includes:
sending the UUID to the ESL, and enabling the ESL to return corresponding second service information after receiving the UUID;
acquiring a UUID with a second characteristic from the returned second service information;
sending the second characteristic UUID to the ESL, and enabling the ESL to return a corresponding second characteristic handle after receiving the second characteristic UUID;
according to the returned second characteristic handle, sending the setting information of the second configuration handle to the ESL for setting, so that the characteristic value reading function of the ESL is opened, and then, returning the second setting success information; the second configuration handle is a configuration handle for data reading;
and when the returned second setting success information is received, reading data from the corresponding characteristic value in the ESL to obtain response feedback pushed by data updating.
Further, as a preferred embodiment, after receiving the display message, updating the display content according to the display message includes:
after receiving a display message, acquiring display data from the display message; the display data comprises display coordinates and display content;
and displaying the acquired display content according to the acquired display coordinates so as to update the display content.
Further in a preferred embodiment, the broadcast ESL information includes ESL address, firmware version, ESL power and/or retention information.
Further as a preferred embodiment, a communication profile is set in the ESL, and the communication profile includes a plurality of services; one of the number of services includes a number of characteristics; one of the plurality of properties includes a property right, a property value, a property description, and/or a property handle.
Example 2
As shown in fig. 2, a communication method of a data communication system, applied in ESLS, includes the following steps:
ESL serving as a server side broadcasts ESL information;
after receiving the commodity information message, the wireless access equipment serving as the client scans the broadcast ESL information according to the destination ESL address, and sends a writing service request to the ESL corresponding to the ESL address after the ESL address contained in the scanned ESL information is matched with the destination ESL address, so that the display message is sent to the corresponding ESL; the commodity information message refers to a commodity information message generated according to commodity updating information after commodity information needing to be updated is detected, and the display message refers to a display message generated according to the commodity information message;
and after receiving the display message, the ESL serving as the server updates the display content according to the display message.
Further, as a preferred embodiment, after receiving the display message, the step of updating the display content according to the display message specifically includes:
and after the display message is received, updating the display content according to the display message, and after the update is completed, sending response feedback pushed by data update to the wireless access equipment.
Further, as a preferred embodiment, after receiving the display message, the step of updating the display content according to the display message specifically includes:
and after the display message is received, updating the display content according to the display message, sending response feedback pushed by data updating to the wireless access equipment after the updating is finished, and then disconnecting the communication connection with the wireless access equipment.
Further, as a preferred embodiment, the step of sending a response feedback of the data update push to the wireless access device includes the following steps:
the wireless access equipment sends a read service request to the ESL corresponding to the ESL address, and obtains response feedback pushed by data update from the ESL.
Further as a preferred embodiment, the step of sending a write service request to the ESL corresponding to the ESL address, so as to send the display message to the corresponding ESL, includes the following steps:
sending the UUID to the ESL, and enabling the ESL to return corresponding first service information after receiving the UUID;
acquiring a first characteristic UUID from the returned first service information;
sending the first characteristic UUID to an ESL (electronic service level library), and enabling the ESL to return a corresponding first characteristic handle after receiving the first characteristic UUID;
according to the returned first characteristic handle, sending the setting information of the first configuration handle to the ESL for setting, enabling a characteristic value writing function of the ESL to be opened, and then returning first setting success information; the first configuration handle is a configuration handle for data writing;
and when the returned first setting success information is received, sending the data to be written to the ESL, thereby writing the data to the characteristic value of the ESL and enabling the ESL to receive the display message.
Further, as a preferred embodiment, the step of sending a read service request to the ESL corresponding to the ESL address and obtaining response feedback pushed by data update from the ESL includes the following steps:
sending the UUID to the ESL, and enabling the ESL to return corresponding second service information after receiving the UUID;
acquiring a UUID with a second characteristic from the returned second service information;
sending the second characteristic UUID to the ESL, and enabling the ESL to return a corresponding second characteristic handle after receiving the second characteristic UUID;
according to the returned second characteristic handle, sending the setting information of the second configuration handle to the ESL for setting, so that the characteristic value reading function of the ESL is opened, and then, returning the second setting success information; the second configuration handle is a configuration handle for data reading;
and when the returned second setting success information is received, reading data from the corresponding characteristic value in the ESL to obtain response feedback pushed by data updating.
Further, as a preferred embodiment, after receiving the display message, the step of updating the display content according to the display message specifically includes:
after receiving a display message, acquiring display data from the display message; the display data comprises display coordinates and display content;
and displaying the acquired display content according to the acquired display coordinates so as to update the display content.
Further in a preferred embodiment, the broadcast ESL information includes ESL address, firmware version, ESL power and/or retention information.
Further as a preferred embodiment, a communication profile is set in the ESL, and the communication profile includes a plurality of services; one of the number of services includes a number of characteristics; one of the plurality of properties includes a property right, a property value, a property description, and/or a property handle.
Example 3
As shown in fig. 3, an electronic shelf label system, the system comprising:
the data pushing source is used for generating a corresponding commodity information message according to the commodity updating information and then sending the commodity information message to the ESL server after detecting that the commodity information needs to be updated;
the ESL server is used for forwarding the commodity information message to the corresponding wireless access equipment after receiving the commodity information message;
at least one wireless access device as a client, which is used for scanning the ESL information broadcasted according to the destination ESL address after receiving the commodity information message; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL corresponding to the ESL address, and sending the display message to the corresponding ESL; the display message refers to a display message generated according to a commodity information message;
at least one ESL serving as a server for broadcasting ESL information; after receiving the display message, updating the display content according to the display message;
and the data pushing source is in communication connection with the ESL through the ESL server and the wireless access equipment in sequence. As for the radio access device and the ESL in the present embodiment, they are implemented using the radio access device and the ESL described in embodiment 1.
Example 4
As shown in fig. 4, a communication method of an electronic shelf label system includes the following steps:
ESL serving as a server side broadcasts ESL information;
after detecting that the commodity information needs to be updated, the data pushing source generates a corresponding commodity information message according to the commodity updating information and then sends the commodity information message to the ESL server;
after receiving the commodity information message, the ESL server forwards the commodity information message to corresponding wireless access equipment;
after receiving the commodity information message, the wireless access equipment serving as the client scans the broadcast ESL information according to the destination ESL address, and sends a writing service request to the ESL corresponding to the ESL address after the ESL address contained in the scanned ESL information is matched with the destination ESL address, so that the display message is sent to the corresponding ESL; the display message refers to a display message generated according to a commodity information message;
and after receiving the display message, the ESL serving as the server updates the display content according to the display message. The steps described for the wireless access device and ESL are implemented using the method steps described in embodiment 2.
Example 5
The invention will be further elucidated with reference to the preferred embodiment. In this embodiment, the wireless access device is preferably an AP access device.
As shown in fig. 5, the electronic shelf label system provided by the present invention is implemented by a mode architecture in which an AP access device is used as a client and an ESL is used as a server, and specifically, the system includes:
the data push source comprises a POS system and/or an E-commerce cloud system;
an ESL server as a server;
the AP access equipment is used as a client and comprises an Internet communication unit, a control unit and a first communication unit;
at least one ESL which is used as a server and comprises a display unit and a second communication unit connected with the first communication unit;
the data push source is in communication connection with the ESL through the ESL server and the AP access device in sequence, and communication between the ESL server and the AP access device and between the AP access device and the ESL is achieved through a client/server side mode architecture.
In the present invention, the ESL as the server has two service operating states: the method comprises the following steps that a broadcast service and a communication service are provided, wherein the communication service comprises a first communication service and a second communication service, the first communication service is a reading service for reading data, or the first communication service comprises a reading service and a display service for reading data; the second communication service is a write service for writing data, or the second communication service includes a write service and a display service for writing data.
For the broadcast service of the ESL, the broadcast data frame comprises data such as an ESL address, a firmware version, ESL electric quantity, reserved information and the like; for the time interval of broadcasting, it can be dynamically adjusted, a longer time interval means a more power-saving mode of operation; for an ESL with the broadcasting time interval of 1S, the average power consumption is 50 muA, the average power consumption per day, namely the average power consumption per day, is 1.2mAH, and therefore when a button battery with the electricity consumption of 500mAH is selected, the working time of the ESL which can continuously work is close to 417 days.
For the communication service of the ESL, the read service and the write service provided by the communication service correspond to the read characteristic and the write characteristic respectively, the former is used for sending data to the AP access device, and the latter is used for receiving the data sent by the AP access device.
In addition, for the ESL serving as a server, the services of the ESL appear in the form of Service, each Service has a unique UUID, and different Service UUIDs represent different services; each Service is composed of a plurality of characters, each character also has a unique UUID, and different character UUIDs represent different characters; a Profile typically contains multiple services. The data traffic is placed in Value of charasteristic, the right to read and write to this Value is defined by Properties, and the written description visible to some users of this Value is defined by a Descriptor. Therefore, in the present invention, the Profile structure of the communication Profile set in the ESL is shown in fig. 7, and specifically includes different services, and a service includes a service UUID and a property, where the property includes a property right, a property value, a handle (Handler) of the property, and a property description.
Based on the above-mentioned ESL system, the specific data flow is shown in fig. 6. In the data flow shown in fig. 6, it mainly includes two processing flows: 1. initializing a flow; 2. data push source to ESL. Specific explanations of these two processing flows are as follows.
(1) And an initialization process of the ESLS.
S101, AP access equipment initiates a first request for establishing connection with an ESL server;
s102, after responding to the first request, the ESL server establishes connection and maintains the connection;
s103, the AP access equipment sends heartbeat information to the ESL server at regular time so as to verify the existence of communication connection between the AP access equipment and the ESL server;
s104, responding the heartbeat information by the ESL server;
s105, the ESL server initiates a second request for establishing connection with the data pushing source;
and S106, after the data pushing source responds to the second request, establishing connection and maintaining the connection.
(2) And after initialization, executing a data communication flow from a data pushing source to the ESL. The process specifically includes the following steps.
S200, ESL broadcasts ESL information.
Specifically, after the end of the sleep state, each ESL executes a broadcast service to broadcast its own ESL information; according to the broadcast data frame, the broadcast ESL information includes data such as ESL address, firmware version, ESL power and reserved information.
S201, after detecting that the commodity information needs to be updated, the data pushing source generates a corresponding commodity information message according to the commodity updating information and sends the commodity information message to the ESL server.
As a preferred embodiment, the step S201 includes:
s2011, the data push source judges whether a first operation instruction is received in real time, wherein the first operation instruction refers to an operation instruction for changing commodity information of a certain commodity;
s2012, after judging that the first operation instruction is received, namely after detecting that the commodity information needs to be updated, executing the corresponding first operation instruction, and then generating a corresponding commodity information message according to the changed commodity information of the commodity, namely the commodity updating information, and then sending the commodity information message to the ESL server;
and S2013, after receiving the commodity information message, the ESL server feeds back the receiving state of the communication to the data pushing source.
In this embodiment, the goods information message includes a destination ESL address and at least one group of goods information composed of a goods code and goods inventory data. The destination ESL address refers to an address of an ESL that needs to update commodity information.
S202, after receiving the commodity information message, the ESL server forwards the commodity information message to the corresponding AP access equipment.
Specifically, the ESL server judges whether a commodity information message transmitted from a data push source is received in real time, and if so, correspondingly forwards the commodity information message to the corresponding AP access device; and when the AP access equipment receives the commodity information message, the receiving state of the communication is fed back to the ESL server.
S203, after receiving the commodity information message, the AP access equipment scans the broadcast ESL information according to the target ESL address; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL corresponding to the ESL address, and sending the display message to the corresponding ESL; the display message refers to a display message generated according to the commodity information message.
Specifically, the AP access device determines in real time whether to receive a commodity information message forwarded by the ESL server, if so, scans the ESL information according to a destination ESL address included in the commodity information message, sends a service request to the ESL after finding a corresponding ESL by scanning, and sends a display message generated according to the commodity information message to the corresponding ESL after establishing a communication connection with the ESL.
In this embodiment, the display message includes a display instruction and display data, and the display data includes a display coordinate and display content.
And S204, after receiving the display message, the ESL updates the display content according to the display message.
Specifically, the ESL determines whether a display message is received, if so, updates display content according to a display instruction and display data in the received display message, feeds back a display result to the AP access device as a response to pushing data update after the display update is completed, and then disconnects communication with the AP access device. That is, this step S204 specifically includes the following steps:
s2041, after receiving the display message, acquiring display data from the display message; the display data comprises display coordinates and display content;
s2042, displaying the obtained display content according to the obtained display coordinates to update the display content; specifically, display operation is started according to a display instruction in the display message, display content is controlled to be displayed on corresponding display coordinates, and after the display is finished, the displayed content is updated commodity information;
s2043, after the updating is completed, response feedback pushed by data updating is sent to the wireless access equipment;
specifically, this step is realized by the following steps:
the AP access equipment sends a read service request to an ESL corresponding to the ESL address, and obtains response feedback pushed by data updating from the ESL;
s2044, the ESL disconnects the communication connection with the AP access equipment.
S205, after the AP access equipment receives the response feedback of data updating push transmitted by the ESL, the communication connection between the AP access equipment and the ESL is disconnected, and the AP access equipment transmits the received response feedback of data updating push to the ESL server.
S206, after receiving the response feedback of data updating push, the ESL server sends the response feedback to the data push source, and a complete data communication process from the data push source to the ESL is completed.
As a preferred embodiment, the AP access device sends a write service request to the ESL corresponding to the ESL address, so as to send the display message to the corresponding ESL, that is, the process of the AP access device writing data into the "service" of the ESL. Firstly, the premise that the AP access equipment writes data into the ESL is that communication connection is established; secondly, each service of the ESL has a unique UUID number, and different service UUIDs represent different services, so that the AP access equipment can find the characteristics specifically contained in the corresponding service through the service UUIDs; similarly, each characteristic also has a unique UUID number, so that after the AP obtains the characteristic UUID, the AP can obtain a handle corresponding to the characteristic through the characteristic UUID; after the handle (Handler) of the property is obtained, data can be written to the property value to implement a data communication process for sending data from the AP to the ESL.
As can be seen, for the flow that the AP access device sends a write service request to the ESL corresponding to the ESL address, so as to send a display message to the corresponding ESL, as shown in fig. 8, the method specifically includes the following steps:
s301, the AP access equipment sends the write service UUID to the ESL, and the ESL returns corresponding first service information after receiving the write service UUID;
s302, the AP access equipment acquires the needed UUID with the first characteristic from the returned first service information;
s303, the AP access equipment sends the first characteristic UUID to the ESL, and the ESL returns the corresponding first characteristic handle after receiving the first characteristic UUID;
s304, the AP access equipment sends the setting information of the first configuration handle to the ESL for setting according to the returned first characteristic handle, so that the characteristic value writing function of the ESL is opened, and then, the first setting success information is returned; the first configuration handle is a configuration handle for data writing;
s305, when the AP access equipment receives the returned first setting success information, the data required to be written is sent to the ESL, and therefore the data is written to the corresponding characteristic value in the ESL, and the ESL receives the display message.
As a preferred embodiment, the AP access device sends a read service request to the ESL corresponding to the ESL address, so as to obtain a response feedback of data update push from the ESL, that is, a process of the AP access device reading data from "service" of the ESL. First, the AP reads data from the ESL on the premise that a communication connection has been established; secondly, each service of the ESL has a unique UUID number, and different service UUIDs represent different services, so that the AP access equipment can find the characteristics specifically contained in the corresponding service through the service UUIDs; similarly, each characteristic also has a unique UUID number, so that after the AP obtains the characteristic UUID, the AP can obtain a handle corresponding to the characteristic through the characteristic UUID; having obtained the handle (Handler) of the property, the property value can be read to enable a data communication process to read data from the AP to the ESL.
As can be seen, for the flow that the AP access device sends a read service request to the ESL corresponding to the ESL address, and obtains response feedback pushed by data update from the ESL, as shown in fig. 9, the method specifically includes the following steps:
s401, the AP access equipment sends the read service UUID to the ESL, and the ESL returns corresponding second service information after receiving the read service UUID;
s402, the AP access equipment acquires a required UUID with a second characteristic from the returned second service information;
s403, the AP access equipment sends the second characteristic UUID to the ESL, and the ESL returns the corresponding second characteristic handle after receiving the second characteristic UUID;
s404, the AP access equipment sends the setting information of the second configuration handle to the ESL for setting according to the returned second characteristic handle, so that the characteristic value reading function of the ESL is opened, and then, second setting success information is returned; the second configuration handle is a configuration handle for data reading;
and S405, when the AP access equipment receives the returned second setting success information, reading data from the corresponding characteristic value in the ESL to obtain response feedback pushed by data updating.
From the above, the data push source, the ESL server, the AP access device, and the ESL in the system of the present invention have the following functions.
The data push source is specifically configured to perform the following steps:
judging whether a first operation instruction is received in real time; when the first operation instruction is judged to be received, namely after the commodity information is detected to be updated, executing the corresponding first operation instruction, generating a corresponding commodity information message according to the changed commodity information of the commodity, namely the commodity updating information, and then sending the commodity information message to the ESL server;
and receiving a communication receiving state fed back by the ESL server and response feedback pushed by the data update.
The ESL server is specifically used for executing the following steps:
judging whether a commodity information message transmitted from a data pushing source is received or not in real time, if so, feeding back a receiving state of communication to the data pushing source, and correspondingly forwarding the commodity information message to corresponding AP access equipment;
receiving a communication receiving state fed back by the AP access equipment and response feedback pushed by the data update; and sends this response feedback to the data push source.
The AP access device is specifically used for executing the following steps:
sending heartbeat information to the ESL server at regular time to verify that a communication connection with the ESL server exists;
judging whether a commodity information message forwarded by an ESL server is received in real time, namely judging whether an updating request exists, if so, feeding back a communication receiving state to the ESL server, and scanning the broadcast ESL information according to a target ESL address; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL, and after establishing communication connection with the ESL, sending a display message generated according to the commodity information message to the corresponding ESL;
and sending a read service request to the ESL corresponding to the ESL address, acquiring response feedback pushed by the data update from the ESL, namely receiving the response feedback pushed by the data update sent by the ESL, and sending the response feedback to the ESL server.
The ESL is specifically configured to perform the following steps:
broadcasting ESL information;
and judging whether a display message is received or not, if so, updating display content according to a display instruction and display data in the received display message, feeding back a display result serving as a response of data updating push to the AP access equipment after the display updating is finished, and then disconnecting the communication connection with the AP access equipment. Specifically, for the step of updating the display content according to the display instruction and the display data in the received display message, the step includes: and starting display operation according to the display instruction, controlling the display content to be displayed on the corresponding display coordinate, and after the display is finished, displaying the content which is the updated commodity information.
It can be seen that the advantages encompassed by the present invention are:
the invention realizes ESLS based on a client/a Server, particularly designs a system architecture taking ESL as the Server and wireless access equipment as the client, and changes the traditional architecture taking a data push source or an ESL Server as the Server and an AP and the ESL as the client; moreover, the ESL in the invention can provide read-write service and/or display service for the wireless access equipment in a broadcasting mode, thus not only ensuring the low-power consumption operation of the ESL, but also overcoming the problems that the ESL is in a dormant state for most of the time in order to save electricity in the traditional framework, the ESL cannot work during the dormancy, and the ESL is congested in service or cannot obtain service due to numerous invalid queries after the dormancy is finished, improving the communication speed and efficiency, reducing the invalid communication data volume and greatly lightening the work processing burden of an ESL server. In addition, the invention also provides a quantitative calculation standard of the low power consumption of the ESL and a calculation basis of the corresponding maintenance time of the battery, thereby being beneficial to the use and maintenance of the ESL by a user. In addition, the asynchronous communication method based on the system not only ensures the certainty and the correctness of the process of updating data from a data push source to the ESL and confirming the feedback, but also realizes the soft real-time requirement of cross-network asynchronous communication by utilizing an advanced software design method, and lays a technical foundation for the large-scale practical application and popularization of the ESLS.
All the contents of the present embodiment are applicable to the above embodiments 1 to 4.
It should be noted that, the step numbers in the above embodiments are provided only for convenience of illustration, the order between the steps is not limited at all, and the order of each step in the embodiments can be adapted according to the understanding of those skilled in the art.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A data communication system is applied to ESLS, wherein the ESLS refers to an electronic shelf label system, and is characterized in that: the system comprises:
the wireless access equipment serving as the client is used for scanning the broadcast ESL information according to the target ESL address after receiving the commodity information message; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL corresponding to the ESL address, and sending the display message to the corresponding ESL; the commodity information message refers to a commodity information message generated according to commodity updating information after commodity information needing to be updated is detected, and the display message refers to a display message generated according to the commodity information message; the wireless access equipment comprises an internet communication unit, a control unit and a first communication unit;
the ESL is used as a server side and used for broadcasting ESL information; after receiving the display message, updating the display content according to the display message; the ESL comprises a display unit and a second communication unit connected with the first communication unit;
the wireless access equipment is in communication connection with the ESL.
2. A data communication system according to claim 1, characterized in that: the ESL is specifically used for broadcasting ESL information; and after the display message is received, updating the display content according to the display message, and after the update is completed, sending response feedback pushed by data update to the wireless access equipment.
3. A data communication system according to claim 2, characterized in that: the ESL is specifically used for broadcasting ESL information; and after the display message is received, updating the display content according to the display message, sending response feedback pushed by data updating to the wireless access equipment after the updating is finished, and then disconnecting the communication connection with the wireless access equipment.
4. A data communication system according to claim 2, characterized in that: the wireless access equipment is specifically used for scanning the broadcast ESL information according to the target ESL address after receiving the commodity information message; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL corresponding to the ESL address, and sending the display message to the corresponding ESL; and sending a read service request to the ESL corresponding to the ESL address, and acquiring response feedback pushed by data update from the ESL.
5. A data communication system according to any of claims 1-4, characterized in that: the sending a write service request to the ESL corresponding to the ESL address, so as to send the display message to the corresponding ESL, includes:
sending the UUID to the ESL, and enabling the ESL to return corresponding first service information after receiving the UUID;
acquiring a first characteristic UUID from the returned first service information;
sending the first characteristic UUID to an ESL (electronic service level library), and enabling the ESL to return a corresponding first characteristic handle after receiving the first characteristic UUID;
according to the returned first characteristic handle, sending the setting information of the first configuration handle to the ESL for setting, enabling a characteristic value writing function of the ESL to be opened, and then returning first setting success information; the first configuration handle is a configuration handle for data writing;
and when the returned first setting success information is received, sending the data to be written to the ESL, thereby writing the data to the characteristic value of the ESL and enabling the ESL to receive the display message.
6. The data communication system of claim 4, wherein: the sending a read service request to the ESL corresponding to the ESL address and obtaining response feedback pushed by data update from the ESL includes:
sending the UUID to the ESL, and enabling the ESL to return corresponding second service information after receiving the UUID;
acquiring a UUID with a second characteristic from the returned second service information;
sending the second characteristic UUID to the ESL, and enabling the ESL to return a corresponding second characteristic handle after receiving the second characteristic UUID;
according to the returned second characteristic handle, sending the setting information of the second configuration handle to the ESL for setting, so that the characteristic value reading function of the ESL is opened, and then, returning the second setting success information; the second configuration handle is a configuration handle for data reading;
and when the returned second setting success information is received, reading data from the corresponding characteristic value in the ESL to obtain response feedback pushed by data updating.
7. A data communication system according to any of claims 1-4, characterized in that: after receiving the display message, updating the display content according to the display message, including:
after receiving a display message, acquiring display data from the display message; the display data comprises display coordinates and display content;
and displaying the acquired display content according to the acquired display coordinates so as to update the display content.
8. A communication method of a data communication system is applied to ESLS, wherein the ESLS refers to an electronic shelf label system, and is characterized in that: the method comprises the following steps:
ESL serving as a server side broadcasts ESL information;
after receiving the commodity information message, the wireless access equipment serving as the client scans the broadcast ESL information according to the destination ESL address, and sends a writing service request to the ESL corresponding to the ESL address after the ESL address contained in the scanned ESL information is matched with the destination ESL address, so that the display message is sent to the corresponding ESL; the commodity information message refers to a commodity information message generated according to commodity updating information after commodity information needing to be updated is detected, and the display message refers to a display message generated according to the commodity information message;
and after receiving the display message, the ESL serving as the server updates the display content according to the display message.
9. An electronic shelf label system, characterized in that: the system comprises:
the data pushing source is used for generating a corresponding commodity information message according to the commodity updating information and then sending the commodity information message to the ESL server after detecting that the commodity information needs to be updated;
the ESL server is used for forwarding the commodity information message to the corresponding wireless access equipment after receiving the commodity information message;
at least one wireless access device as a client, which is used for scanning the ESL information broadcasted according to the destination ESL address after receiving the commodity information message; when the ESL address contained in the scanned ESL information is matched with the target ESL address, sending a writing service request to the ESL corresponding to the ESL address, and sending the display message to the corresponding ESL; the display message refers to a display message generated according to a commodity information message; the wireless access equipment comprises an internet communication unit, a control unit and a first communication unit;
at least one ESL serving as a server for broadcasting ESL information; after receiving the display message, updating the display content according to the display message; the ESL comprises a display unit and a second communication unit connected with the first communication unit;
and the data pushing source is in communication connection with the ESL through the ESL server and the wireless access equipment in sequence.
10. A communication method of an electronic shelf label system is characterized in that: the method comprises the following steps:
ESL serving as a server side broadcasts ESL information;
after detecting that the commodity information needs to be updated, the data pushing source generates a corresponding commodity information message according to the commodity updating information and then sends the commodity information message to the ESL server;
after receiving the commodity information message, the ESL server forwards the commodity information message to corresponding wireless access equipment;
after receiving the commodity information message, the wireless access equipment serving as the client scans the broadcast ESL information according to the destination ESL address, and sends a writing service request to the ESL corresponding to the ESL address after the ESL address contained in the scanned ESL information is matched with the destination ESL address, so that the display message is sent to the corresponding ESL; the display message refers to a display message generated according to a commodity information message;
and after receiving the display message, the ESL serving as the server updates the display content according to the display message.
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