CN108183967A - Suitable for the OPC UA publish/subscribe methods of IPv6 wireless sensor networks - Google Patents
Suitable for the OPC UA publish/subscribe methods of IPv6 wireless sensor networks Download PDFInfo
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- CN108183967A CN108183967A CN201810039837.5A CN201810039837A CN108183967A CN 108183967 A CN108183967 A CN 108183967A CN 201810039837 A CN201810039837 A CN 201810039837A CN 108183967 A CN108183967 A CN 108183967A
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- message
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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
- 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
Abstract
The present invention relates to a kind of OPC UA publish/subscribe methods suitable for IPv6 wireless sensor networks, belong to wireless sensor network technology field.Borde gateway in IPv6 wireless sensor networks as message is forwarded and acted on behalf of by this method, and agency is made to have the function of carrying out message screening based on message queue (Queue) and the message producer (WriterId).In addition, agency also has resource discovering and fault tolerance, the resource discovering request of subscriber and the subscription of mistake request can be responded.The present invention enables the publish/subscribe method of OPC UA agreements to be suitable for IPv6 wireless sensor networks, saves the energy of publisher and subscriber, reduces the load of network.
Description
Technical field
The invention belongs to wireless sensor network technology field, it is related to a kind of suitable for IPv6 wireless sensor networks
OPC UA publish/subscribe methods.
Background technology
IPv6 wireless sensor networks are that IPv6 technologies are applied to wireless sensor network to realize the complete of sensor node
IPization makes the sensor node in network that can be seamlessly connected with existing IP network.The type network generally has center control
Framework processed, using border router (or borde gateway) realize the management to nodes and the convergence to node data with
Forwarding.The resource of border router (or borde gateway) is generally more rich, and node then generally has resource-constrained and energy
The characteristics of limited is measured, the technology that some are used in wired IP networks at present is applied to general in IPv6 wireless sensor networks
It is required for making adaptation for These characteristics.
The unified information model of OPC UA protocol definitions can solve the mutual behaviour of agreement in IPv6 wireless sensor networks
Make sex chromosome mosaicism, and publish/subscribe pattern is a kind of common communication mechanism in IPv6 wireless sensor networks, therefore, by OPC
The publish/subscribe method of UA agreements is of great significance applied to IPv6 wireless sensor network scenes.Practical IPv6 without
In line sensor network scene, publisher and subscriber in publish/subscribe mechanism are resource-constrained and energy constraints
IPv6 sensor nodes are often powered node using battery, and the data communication between node is energy expenditure
Major part, effective publish/subscribe method, it is possible to reduce the quantity of giving out a contract for a project of node simplifies processing of the data packet in node side
Step saves the traffic load in node energy and reduction network with this.
At present, OPC foundations have been defined for the specification of publish/subscribe pattern, two methods defined in specification.First
Kind method realizes the forwarding of message using the multicast of udp protocol, and publisher and subscriber add in the group of a UDP multicast, when
When having news release, the subscriber of this group just can receive message；Second method is realized using the agency of the third Protocol
Message forwards, such as AMQP or MQTT, and when there is news release, publisher sends message as the load of the third Protocol
To agency, agency relays to subscriber.Both methods is all based on wired IP networks design, and considers IPv6 and wirelessly pass
Sensor network scenarios, traditional udp multicast method need the support of multicast protocol to be difficult to directly be applicable in wireless scene,
Using the method for middleware that the agency of the third Protocol forwards as message due to agency can only according to message header to message into
Row forwarding, can increase the quantity of giving out a contract for a project of node, be unfavorable for node and save energy and reduce network overhead.In consideration of it, OPC bases
Both of which under the publish/subscribe pattern that gold can propose is difficult to be directly applied for IPv6 wireless sensor networks.Therefore, originally
Invention proposes a kind of OPC UA publish/subscribe methods suitable for IPv6 wireless sensor networks, it is therefore intended that retains OPC
Under the premise of UA publish/subscribe methodological functions, save the energy of node and reduce the load of network.
Invention content
In view of this, the purpose of the present invention is to provide a kind of OPC UA hairs suitable for IPv6 wireless sensor networks
Cloth/method for subscribing, the agency that the border router (or borde gateway) in IPv6 wireless sensor networks is forwarded as message,
Increase in border router (or borde gateway) and filtered based on message queue (Queue) and the message producer (WriterId)
The function of message is adapted to IPv6 agreements and wireless protocols using 6LoWPAN technologies, at the same agency can support resource discovering and
Fault tolerance reduces the quantity of giving out a contract for a project of publisher, and simplifies the step of subscriber handles data packet, saves node energy, reduces net
Network expense.
In order to achieve the above objectives, the present invention provides following technical solution：
Suitable for the OPC UA publish/subscribe methods of IPv6 wireless sensor networks, include the following steps：
S1：Publisher sends the message for needing to issue to border router, and border router receives message and establishes and sent out
The message queue list of cloth and the corresponding message producer list of each message queue；
S2：Subscriber sends the message for needing to subscribe to border router, and border router utilizes subscriber's address mark
Need the message queue subscribed to and the corresponding message producer；
S3：Publisher sends a new message to border router, and border router utilizes the message queue in message
Find corresponding message queue in message queue list；
S4：Border router needs the subscriber for subscribing to current message queue to find the message for needing to subscribe to life for each
Production person will need the corresponding Message Payload of the message producer subscribed to retain, not need to the producer couple subscribed in current message
The Message Payload answered is given up；
S5：Message after filtering is sent to subscriber by border router；
S6：Subscriber receives the message after the filtering of border router forwarding, parses message.
Further, the message of publisher's publication uses 6LoWPAN technologies to udp protocol head, IPv6 protocol headers
It is compressed to adapt to wireless scene, a message queue is only corresponded in every message, each message queue includes multiple message
The producer.
Further, when the border router receives a piece of news of publisher's publication, this message is first looked for
Queue whether there is, if being not present, add this queue in queue table, and the corresponding producer of this queue is added
To producer's list of the queue.
Further, a piece of news of publisher's publication and the queue of this message are received when the border router
When existing in the message queue list of border router, all subscribers for subscribing to this message are found, and according to each
Subscriber needs the different producer's filter messages load for this message queue subscribed to, the message producer couple not being subscribed
The Message Payload answered is given up, meanwhile, the producer being not included in this message in current message queue producer's list is added
Add list.
Further, the border router supports resource discovering and fault tolerance, when the resource for receiving subscriber's transmission
After discovery request message, the message queue currently existed and the corresponding message producer are returned into subscriber；Work as subscription
In the absence of the subscription information that person sends, error message is returned into subscriber.
The beneficial effects of the present invention are：
(1) the OPC UA publish/subscribe methods proposed by the present invention suitable for IPv6 wireless sensor networks, utilize IPv6
Border router (or borde gateway) in wireless sensor network realizes message forwarding as agency, simplifies network structure, keeps away
Exempt to introduce the third Protocol, solve traditional OPC UA publish/subscribe pattern UDP multicasts and be difficult to directly to be applicable in IPv6 and wirelessly pass
The problem of sensor network and introducing the third Protocol can increase network overhead, waste node energy.
(2) it is compared with traditional OPC UA message forwarding, it is proposed by the present invention suitable for IPv6 wireless sensor networks
OPC UA publish/subscribe methods, when message arrival is acted on behalf of, agency can utilize the message queue of Subscriber subscriptions and message to give birth to
Production person is filtered message.In this way, publisher can reduce quantity of giving out a contract for a project, and subscriber can simplify data packet
Processing step, so as to save the energy of publisher and subscriber and reduce network overhead.
(3) demand of publish/subscribe relationship is established according to OPC UA protocol issuances/subscribing mode, the present invention can support
Subscriber to the resource discovering of subscription information, meanwhile, in the absence of the information of Subscriber subscriptions, agency can respond wrong letter
It ceases to subscriber.
Description of the drawings
In order to make the purpose of the present invention, technical solution and advantageous effect clearer, the present invention provides drawings described below and carries out
Explanation：
Fig. 1 is OPC UA protocol issuances/method for subscribing flow chart proposed by the present invention；
Fig. 2 is OPC UA protocol issuances/method for subscribing application scenario diagram proposed by the present invention；
Fig. 3 is for message queue (Queue) list and the message producer (WriterId) list in agency and subscriber
Location mapping graph；
Fig. 4 is proxy response subscriber resource discovering and wrong subscription information flow chart.
Specific embodiment
Below in conjunction with attached drawing, the preferred embodiment of the present invention is described in detail.
For the deficiency of existing OPC UA publish/subscribe methods, the structure feature of IPv6 wireless sensor networks is considered, it will
The agency that border router (or borde gateway) in IPv6 wireless sensor networks is forwarded as message, IPv6 sensor nodes
As publisher or subscriber.It is increased for agency based on message queue (Queue) and the message producer (WriterId)
Filter message function can support resource discovering and fault tolerance.Fig. 1 is OPC UA publish/subscribe sides proposed by the present invention
Method flow chart.Method provided by the invention the specific implementation process is as follows：
Fig. 2 is OPC UA protocol issuances/method for subscribing application scenario diagram.Using IPv6 wireless sensor networks as inventive method
Specific embodiment, communication entity include publisher, agency, subscriber.Arbitrary node in sensor network is as publisher
Or subscriber, the agency that border router (or borde gateway) is forwarded as message.It is as follows：
Step1：Publisher needs the data information issued to agency's publication, and agency receives the message of the publisher；
Step2：Agency establishes announced message queue list and the corresponding producer's list of each message queue.
Step3：Subscriber sends the message for needing to subscribe to agency, and agency is subscribed to using subscriber's address mark needs
Message queue and the corresponding producer.
Step4：Publisher newly issues a piece of news, acts on behalf of and determines to need to subscribe to this according to the message queue in this message
The subscriber of message, and the corresponding load of the producer for oneself not needing to subscribe to is filtered out for each subscriber, retaining needs
The corresponding load of the producer to be subscribed to.
Step5：Message after filtering is sent to subscriber by agency.
Step6：Subscriber receives the message after the filtering of agency's forwarding, parses message.
Fig. 3 is message queue list and message producer list and subscriber's address of cache figure, specific mapping relations
It is as follows：
When publisher issues a piece of news to acting on behalf of, agency can judge first according to the message queue in this message
Whether this message queue has existed in agency, if being not present, this message queue is added to the message team of agency
In row list, if in the presence of message screening is carried out.
In agency have multiple message queues, each message queue have multiple message producers, and when subscriber to
After agency sends the information for needing to subscribe to, the message queue subscribed to using subscriber's address mark needs and current message team are acted on behalf of
Row need the message producer subscribed to.
Fig. 4 is proxy response subscriber resource discovering and wrong subscription information flow chart, is as follows：
Step1：Subscriber sends resource discovering request to agency；
Step2：Announced message queue and the corresponding message producer list of each queue are returned to and ordered by agency
Reader；
Step3：Subscriber sends the message queue being not present to agency or the message producer subscribes to request；
Step4：Agency returns to subscriber's error message.
The present invention is agency with border router (or borde gateway), and agency is given birth to based on message queue (Queue) and message
The method that production person (WriterId) forwards message is not only applicable to IPv6 wireless sensor networks, for the OPC of other networks
UA publish/subscribe communication patterns are also suitable.
Finally illustrate, preferred embodiment above is merely illustrative of the technical solution of the present invention and unrestricted, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (5)
1. suitable for OPC UA (the Object Linking and Embedding for of IPv6 wireless sensor networks
Process Control UnifiedArchitecture, for object connection and the embedded unified shader of process control) hair
Cloth/method for subscribing, it is characterised in that：This method includes the following steps：
S1：Publisher sends the message for needing to issue to border router, and border router receives message and establishes announced
Message queue list and the corresponding message producer list of each message queue；
S2：Subscriber sends the message for needing to subscribe to border router, and border router is needed using subscriber's address mark
The message queue of subscription and the corresponding message producer；
S3：Publisher sends a new message to border router, and border router is found using the message queue in message
Corresponding message queue in message queue list；
S4：Border router needs the subscriber for subscribing to current message queue to find the message for needing to subscribe to production for each
Person will need the corresponding Message Payload of the message producer subscribed to retain in current message, do not need to the producer subscribed to and correspond to
Message Payload give up；
S5：Message after filtering is sent to subscriber by border router；
S6：Subscriber receives the message after the filtering of border router forwarding, parses message.
2. the OPC UA publish/subscribe methods according to claim 1 suitable for IPv6 wireless sensor networks, feature
It is：The message of the publisher publication udp protocol head, IPv6 protocol headers are compressed using 6LoWPAN technologies with
Wireless scene is adapted to, a message queue is only corresponded in every message, each message queue includes multiple message producers.
3. the OPC UA publish/subscribe methods according to claim 1 suitable for IPv6 wireless sensor networks, feature
It is：When the border router receive publisher publication a piece of news when, first look for this message queue whether
In the presence of if being not present, this queue being added in queue table, and the corresponding producer of this queue is added to the queue
Producer's list.
4. the OPC UA publish/subscribe methods according to claim 1 suitable for IPv6 wireless sensor networks, feature
It is：When the border router receives a piece of news of publisher publication and the queue of this message is in border routing
When existing in the message queue list of device, all subscribers for subscribing to this message are found, and according to each subscriber's needs
The different producer's filter messages load for this message queue subscribed to, the corresponding message of the message producer not being subscribed are born
Load is given up, meanwhile, the producer being not included in this message in current message queue producer's list is added to list.
5. the OPC UA publish/subscribe methods according to claim 1 suitable for IPv6 wireless sensor networks, feature
It is：The border router supports resource discovering and fault tolerance, when the resource discovering request for receiving subscriber's transmission disappears
After breath, the message queue currently existed and the corresponding message producer are returned into subscriber；When what subscriber sent orders
In the absence of readding information, error message is returned into subscriber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810039837.5A CN108183967B (en) | 2018-01-16 | 2018-01-16 | OPC UA (optical proximity correction) publishing/subscribing method suitable for IPv6 wireless sensor network |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810039837.5A CN108183967B (en) | 2018-01-16 | 2018-01-16 | OPC UA (optical proximity correction) publishing/subscribing method suitable for IPv6 wireless sensor network |
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| CN108183967A true CN108183967A (en) | 2018-06-19 |
| CN108183967B CN108183967B (en) | 2020-08-04 |
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Cited By (7)
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| CN109739816A (en) * | 2018-10-12 | 2019-05-10 | 比亚迪股份有限公司 | The date storage method and device of comprehensive monitoring system based on rail traffic |
| CN110731074A (en) * | 2018-12-13 | 2020-01-24 | Oppo广东移动通信有限公司 | Subscription message processing method and device, computer equipment and storage medium |
| CN111142487A (en) * | 2019-12-30 | 2020-05-12 | 浪潮通用软件有限公司 | Equipment data acquisition system based on OPC UA unified architecture protocol |
| CN112751943A (en) * | 2021-01-19 | 2021-05-04 | 国网江苏省电力有限公司无锡供电分公司 | Data communication method, intermediate device and data communication system |
| CN113031507A (en) * | 2021-03-25 | 2021-06-25 | 超越科技股份有限公司 | High-efficiency transmission method for field bus central server based on OPC UA |
| CN113542314A (en) * | 2020-04-13 | 2021-10-22 | 烽火通信科技股份有限公司 | Method and system for realizing subscription mode based on keyword filtering |
| CN114374708A (en) * | 2021-12-07 | 2022-04-19 | 上海交通大学 | Intelligent factory data automatic subscription method based on collaborative filtering and MQTT |
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| CN110731074A (en) * | 2018-12-13 | 2020-01-24 | Oppo广东移动通信有限公司 | Subscription message processing method and device, computer equipment and storage medium |
| CN111142487A (en) * | 2019-12-30 | 2020-05-12 | 浪潮通用软件有限公司 | Equipment data acquisition system based on OPC UA unified architecture protocol |
| CN113542314A (en) * | 2020-04-13 | 2021-10-22 | 烽火通信科技股份有限公司 | Method and system for realizing subscription mode based on keyword filtering |
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| CN113031507A (en) * | 2021-03-25 | 2021-06-25 | 超越科技股份有限公司 | High-efficiency transmission method for field bus central server based on OPC UA |
| CN114374708A (en) * | 2021-12-07 | 2022-04-19 | 上海交通大学 | Intelligent factory data automatic subscription method based on collaborative filtering and MQTT |
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Effective date of registration: 20220207 Address after: 401120 No. 28, datagu Middle Road, Yubei District, Chongqing Patentee after: Institute of industrial Internet Chongqing University of Posts and Telecommunications Address before: 400065 Chongqing Nan'an District huangjuezhen pass Chongwen Road No. 2 Patentee before: CHONGQING University OF POSTS AND TELECOMMUNICATIONS |