CN111601291A - RFID middleware, publish-subscribe system and data transmission method - Google Patents
RFID middleware, publish-subscribe system and data transmission method Download PDFInfo
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- CN111601291A CN111601291A CN202010265094.0A CN202010265094A CN111601291A CN 111601291 A CN111601291 A CN 111601291A CN 202010265094 A CN202010265094 A CN 202010265094A CN 111601291 A CN111601291 A CN 111601291A
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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
- 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
- H04L67/56—Provisioning of proxy services
- H04L67/566—Grouping or aggregating service requests, e.g. for unified processing
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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
- H04W4/50—Service provisioning or reconfiguring
Abstract
The application discloses an RFID middleware, a publish-subscribe system and a data transmission method, comprising a data acquisition module, an event processing storage module and a publish-subscribe mechanism module which are packaged in the middleware, wherein the data acquisition module is used for acquiring a data set from a publish end, the event processing storage module comprises a rule engine and an event storage area, the rule engine is used for generating a first event to be published according to the data in the data set, the event storage area is used for storing the first event to be published, the event storage area is established based on an address space model which is connected with an object and embedded in a process aspect unified framework OPC UA, the format of the first event to be published is consistent, the publish-subscribe mechanism module is used for publishing the first event to be published in the event storage area to the subscribe end according to the first requirement of the subscribe end, and the burden of upper-layer application software can be relieved, the event processing efficiency is improved.
Description
Technical Field
The application relates to the technical field of middleware, in particular to an RFID middleware, a publish-subscribe system and a data transmission method.
Background
Radio Frequency Identification (RFID) is a Radio Frequency Identification wireless technology, and the implementation of the technology is usually completed by an electronic tag, an RFID reader and a data manager, and the technology is widely applied to multiple industries such as logistics storage, production and manufacturing, medicine, retail and the like. The traditional RFID middleware mainly plays the roles of an RFID read-write manager and a data processing and distribution center, and the common method is to firstly carry out simple smooth processing on the collected tag data and then upload the processed tag data to application layer software, so that certain requirements can be met under the condition of small data volume.
However, most of the RFID application environments are faced with massive data, so the traditional event processing method greatly increases the burden of upper application software, so that the data processing efficiency is sharply reduced, and the real requirements cannot be met.
Disclosure of Invention
The embodiment of the application provides an RFID middleware, a publish-subscribe system and a data transmission method, which are used for relieving the burden of upper-layer application software corresponding to the middleware and improving the event processing efficiency of the middleware.
In one aspect, the embodiment of the application provides a radio frequency identification RFID middleware, which includes a data acquisition module, an event processing and storing module, and a publish-subscribe mechanism module encapsulated in the middleware,
a data acquisition module for obtaining a data set from a publishing terminal,
the event processing and storing module comprises a rule engine and an event storing area, the rule engine is used for generating a first event to be issued from data in the data set according to rule definition, the event storing area is used for storing the first event to be issued, the event storing area is established based on an address space model which is connected with objects and embedded in a uniform architecture OPC UA in process aspect, the format of the first event to be issued is consistent,
and the publishing and subscribing mechanism module is used for publishing the first event to be published in the event storage area to the subscriber according to the first requirement of the subscriber.
Optionally, the event processing storage module further comprises an event processing engine,
the event processing engine is used for converting a first event to be issued in the event storage area into a second event to be issued according to the event definition, the complexity of the second event to be issued is higher than that of the first event to be issued, and the event storage area is used for storing the second event to be issued.
Optionally, the event storage area includes at least one first storage area for storing a first event to be published, and the event storage area includes at least one second storage area for storing a second event to be published.
Optionally, the format of the first event to be published is the same as the format of the second event to be published.
Optionally, the data acquisition module is further configured to perform filtering and cleaning processing on the acquired data set.
Optionally, the RFID further comprises an application layer event service interface,
and the publishing and subscribing mechanism module is used for publishing the first event to be published and/or the second event to be published to the subscribing terminal through the application layer event service interface.
On the other hand, the release subscription system comprises an RFID middleware and a client based on an OPC UA architecture, and an event subscription application corresponding to the client subscribes a node tag of a first event to be released and/or a node tag of a second event to be released in an event storage area through the client to acquire the first event to be released and/or the second event to be released.
In another aspect, a data transmission method based on an RFID middleware is provided, where the method is applied to the RFID middleware, the RFID middleware includes a data acquisition module, an event processing storage module and a publish-subscribe mechanism module, the event processing storage module includes a rule engine and an event storage area, and the method includes:
the data set is obtained from the issuing end through the data acquisition module,
generating a first event to be published from the data in the data set according to the rule definition by the rule engine,
storing the first event to be issued into an event storage area, wherein the event storage area is established based on an address space model which is connected by an object and embedded in a uniform architecture OPC UA in process aspect, the format of the first event to be issued is consistent,
and publishing the first event to be published in the event storage area to the subscriber terminal through the publishing and subscribing mechanism module according to the first requirement of the subscriber terminal.
Optionally, the event processing storage module further comprises an event processing engine,
after the first event to be published is stored in the event storage area, the method further comprises the following steps:
and converting the first event to be issued in the event storage area into a second event to be issued according to the event definition by the event processing engine, wherein the complexity of the second event to be issued is higher than that of the first event to be issued, and storing the second event to be issued in the event storage area.
Another aspect provides an electronic device, including a processor and a memory, where at least one instruction or at least one program is stored in the memory, and the at least one instruction or the at least one program is loaded by the processor and executes the data transmission method.
Another aspect provides a computer-readable storage medium having at least one instruction or at least one program stored therein, the at least one instruction or the at least one program being loaded by a processor and executing the data transmission method.
The embodiment of the application provides an RFID middleware, a publish-subscribe system and a data transmission method, and the method has the following technical effects: the event processing and storing module comprises a rule engine and an event storing area, the rule engine is used for generating a first event to be published according to rule definition, the event storing area is used for storing the first event to be published, the event storing area is established based on an address space model which is connected with an object and embedded in a process aspect unified framework OPC UA, the format of the first event to be published is consistent, and the publishing and subscribing mechanism module is used for publishing the first event to be published in the event storing area to a subscriber according to a first requirement of the subscriber. The upper application software can subscribe the first event to be published in the same storage area, and because the first event to be published is in a uniform format, the upper application software does not need to convert the event format or reduce the number of times of converting the event format, so that the load of the middle and upper application software can be relieved, and the event processing efficiency is improved.
Drawings
In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an RFID middleware provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an RFID middleware provided in an embodiment of the present application;
FIG. 3 is a schematic structural diagram of an RFID middleware provided in an embodiment of the present application;
FIG. 4 is a schematic structural diagram of an RFID middleware provided in an embodiment of the present application;
FIG. 5 is a publish-subscribe system including RFID middleware provided by an embodiment of the present application;
fig. 6 is a schematic flowchart of a data transmission method based on RFID middleware according to an embodiment of the present application.
Detailed Description
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 only a part of the embodiments of the present application, and not all of the 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.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data sets so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or server that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an RFID middleware provided in an embodiment of the present application, where the schematic structural diagram of the RFID middleware 10 includes a data acquisition module 11, an event processing storage module 12, and a publish-subscribe mechanism module 13 encapsulated in the middleware 10, where the event processing storage module 12 includes a rule engine 121 and an event storage area 122.
In the embodiment of the present application, the data acquisition module 11 of the RFID middleware is configured to obtain a data set from a publishing end, the rule engine 121 is configured to generate a first event to be published from data in the data set according to a rule definition, the event storage area 122 is configured to store the first event to be published, the event storage area 122 is established based on an object connection and an address space model embedded in a process-oriented unified architecture OPCUA, formats of the first event to be published are consistent, and the publish-subscribe mechanism module 13 is configured to publish the first event to be published in the event storage area 122 to a subscribing end according to a first requirement of the subscribing end. The upper application software can subscribe the first event to be published in the same storage area, and because the first event to be published is in a uniform format, the upper application software does not need to convert the event format or reduce the number of times of converting the event format, so that the load of the middle and upper application software can be relieved, and the event processing efficiency is improved.
Optionally, the rule definition in the foregoing may be stored in a server under the OPC UA framework, and when the rule definition is applied specifically, the rule definition is a condition that triggers the rule engine 121 to generate the first event to be published from the data in the data set.
Optionally, the data acquisition module may include a data acquisition driver, and before the data acquisition module acquires the data set, the data acquisition driver needs to perform drive adaptation on the RFID reader/writer or other devices, and the device driver requests a response to trigger the RFID reader/writer to read the tag data, so as to obtain the data set. Optionally, the data acquisition module 11 is further configured to perform a filtering and cleaning process on the acquired data set, so that the data in the data set obtained by the middleware 10 is valid data.
In this embodiment of the present application, fig. 2 is a schematic structural diagram of an RFID middleware provided in this embodiment of the present application, and as shown in fig. 2, the event processing storage module 12 further includes an event processing engine 123. The event processing engine 123 is configured to convert the first event to be published in the event storage area 122 into a second event to be published according to the event definition, where the second event to be published has a higher complexity than the first event to be published. And, the event storage area 122 may be used to store the second event to be published.
Optionally, the event definition in the foregoing may be stored in a server under the OPC UA framework, and in a specific application, the event processing engine 123 may monitor the first event to be published in the event storage area 122, and perform a nor operation on the first event to be published according to the event definition to generate a second event to be published. The second event to be published can be called a complex event containing semantics, and the first event to be published can be called a basic event.
In the embodiment of the present application, the event storage area 122 established based on the address space model may be associated with specific data characteristics, such as data in a data set, including acquisition frequency, cycle, temperature, and the like. The equipment can have semantics by establishing an address space model, so that equipment instantiation is realized, for example, information such as a specific part of a certain machine on a certain production line can form a model, and association between data sets is realized through address space nodes, so that association between the data sets and the equipment to which the data sets belong is realized.
In an alternative embodiment, the event storage area 122 may be a whole storage area, and the first event to be published and the second event to be published are stored at the same time, and the format of the first event to be published and the format of the second event to be published are the same. Wherein the format of the event may be a data format.
In another alternative embodiment, the event storage area 122 may be divided into a plurality of storage areas. Optionally, the event storage area includes at least one first storage area for storing a first event to be published, and the event storage area further includes at least one second storage area for storing a second event to be published. For example, fig. 3 is a schematic structural diagram of an RFID middleware provided in an embodiment of the present application, and as shown in fig. 3, the event storage area includes a first storage area and a second storage area. Optionally, the format of the first event to be published is the same as the format of the second event to be published.
Based on the two embodiments, when the event subscription application (or referred to as upper layer application software) subscribes to the first event to be published or the second event to be published, if the data format of the event subscription application is consistent with that of the first event to be published, the event subscription application obtains the first event to be published or the second event to be published and then directly uses the event to be published without performing steps such as parsing and conversion. If the data format of the event subscription application is not consistent with the data format of the first event to be published, only one event analysis program is needed to analyze the first event to be published and the second event to be published, so that the event to be published in different formats is prevented from being analyzed by a plurality of event analysis programs. Therefore, the burden of the event subscription application is relieved, and the event processing efficiency is improved.
In this embodiment of the present application, fig. 4 is a schematic structural diagram of an RFID middleware provided in this embodiment of the present application, and as shown in fig. 4, the RFID middleware 10 further includes an application layer event service interface 14. The publish-subscribe mechanism module 13 is configured to publish the first event to be published and/or the second event to be published to the subscriber through the application layer event service interface 14.
In this embodiment of the present application, fig. 5 is a publish-subscribe system including an RFID middleware provided in this embodiment of the present application, and includes the RFID middleware 10 mentioned above and a client 20 based on an OPC UA architecture, where an event subscription application corresponding to the client 20 can subscribe to a node tag of a first event to be published and/or a node tag of a second event to be published in an event storage area 122 through the client 20 to obtain the first event to be published and/or the second event to be published.
Alternatively, the event subscription application corresponding to the client 20 may be located on the client 20, and is downloaded from the network by the client. Alternatively, the event subscription application corresponding to the client 20 may be located on another terminal under the local area network where the client is located.
In this embodiment of the present application, an embodiment of the present application further provides a flowchart of a data transmission method based on an RFID middleware, where the method is applied to the RFID middleware, the RFID middleware includes a data acquisition module, an event processing storage module and a publish-subscribe mechanism module, the event processing storage module includes a rule engine and an event storage area, as shown in fig. 6, the method includes:
s601: acquiring a data set from a publishing terminal through a data acquisition module;
s602: generating a first event to be issued by the data in the data set according to the rule definition through a rule engine;
s603: storing a first event to be issued to an event storage area; the event storage area is established based on an address space model which is connected by an object and embedded in the unified architecture OPCUA in process aspect; the formats of the first events to be issued are consistent;
s604: and publishing the first event to be published in the event storage area to the subscriber terminal through the publishing and subscribing mechanism module according to the first requirement of the subscriber terminal.
In an optional embodiment, the event processing storage module further comprises an event processing engine. Optionally, after the first event to be published is stored in the event storage area, the middleware may convert the first event to be published in the event storage area into a second event to be published according to the event definition through the event processing engine; and the complexity degree of the second event to be published is higher than that of the first event to be published. Subsequently, the middleware may store the second event to be published to the event storage area.
Embodiments of the present application also provide a computer storage medium, which may be disposed in a server to store at least one instruction, at least one program, a set of codes, or a set of instructions related to implementing a data transmission method in the method embodiments, and the at least one instruction, the at least one program, the set of codes, or the set of instructions is loaded and executed by the processor to implement the data transmission method.
Alternatively, in this embodiment, the storage medium may be located in at least one network server of a plurality of network servers of a computer network. Optionally, in this embodiment, the storage medium may include, but is not limited to: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
It should be noted that: the sequence of the embodiments of the present application is only for description, and does not represent the advantages and disadvantages of the embodiments. And specific embodiments thereof have been described above. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. A radio frequency identification RFID middleware is characterized by comprising a data acquisition module, an event processing and storing module and a publishing and subscribing mechanism module which are packaged in the middleware;
the data acquisition module is used for acquiring a data set from a publishing terminal;
the event processing and storing module comprises a rule engine and an event storing area, wherein the rule engine is used for generating a first event to be issued from the data in the data set according to rule definition; the event storage area is used for storing the first event to be issued; the event storage area is established based on an address space model of object connection and embedding in a uniform architecture OPC UA in process aspect; the formats of the first events to be issued are consistent;
the publishing and subscribing mechanism module is configured to publish the first event to be published in the event storage area to the subscriber according to a first requirement of the subscriber.
2. The RFID middleware of claim 1 wherein the event processing storage module further comprises an event processing engine;
the event processing engine is used for converting the first event to be issued in the event storage area into a second event to be issued according to an event definition; the complexity degree of the second event to be published is higher than that of the first event to be published;
the event storage area is used for storing the second event to be issued.
3. The RFID middleware of claim 2,
the event storage area comprises at least one first storage area used for storing the first event to be published;
the event storage area comprises at least one second storage area used for storing the second event to be issued.
4. RFID middleware according to claim 2 or 3,
and the format of the first event to be published is the same as that of the second event to be published.
5. The RFID middleware of claim 1,
the data acquisition module is also used for filtering and cleaning the acquired data set.
6. The RFID middleware of claim 2 wherein the RFID further comprises an application layer event service interface;
and the publishing and subscribing mechanism module is used for publishing the first event to be published and/or the second event to be published to a subscribing terminal through the application layer event service interface.
7. A publish-subscribe system comprising RFID middleware, comprising the RFID middleware of any one of claims 2-6 and a client based on the OPC UA architecture,
and the event subscription application corresponding to the client subscribes the node label of the first event to be published and/or the node label of the second event to be published in the event storage area through the client to acquire the first event to be published and/or the second event to be published.
8. A data transmission method based on RFID middleware is applied to the RFID middleware, the RFID middleware comprises a data acquisition module, an event processing storage module and a publish-subscribe mechanism module, the event processing storage module comprises a rule engine and an event storage area, and the method comprises the following steps:
acquiring a data set from a publishing terminal through the data acquisition module;
generating a first event to be published by the data in the data set according to rule definition through the rule engine;
storing the first event to be issued to the event storage area; the event storage area is established based on an address space model of object connection and embedding in a uniform architecture OPC UA in process aspect; the formats of the first events to be issued are consistent;
and publishing the first event to be published in the event storage area to the subscriber end through the publishing and subscribing mechanism module according to a first requirement of the subscriber end.
9. The data transmission method according to claim 8, wherein the event processing storage module further comprises an event processing engine;
after storing the first event to be published to the event storage area, the method further includes:
converting the first event to be issued in the event storage area into a second event to be issued according to an event definition through the event processing engine; the complexity degree of the second event to be published is higher than that of the first event to be published;
and storing the second event to be issued to the event storage area.
10. A computer storage medium, in which at least one instruction or at least one program is stored, which is loaded and executed by a processor to implement the data transmission method according to claim 8 or claim 9.
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| CN106023621A (en) * | 2016-07-22 | 2016-10-12 | 山东交通学院 | Urban intelligent traffic guidance method based on RFID and WeChat platform |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113781101A (en) * | 2021-08-09 | 2021-12-10 | 深圳市惟客数据科技有限公司 | Event center management method and device based on real-time calculation and readable medium |
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