CN117596313A - Multi-protocol acquisition method for Internet of things system - Google Patents
Multi-protocol acquisition method for Internet of things system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
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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
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
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Abstract
The invention relates to the technical field of the Internet of things, and discloses a multi-protocol acquisition method of an Internet of things system, which comprises the following steps: the service providing layer checks the request parameters after receiving the request of the client, if the request passes, the service providing layer sends a request message to the bridging layer, the bridging layer determines a transmission protocol used by the equipment according to the unique identification information of the equipment in the request parameters and then sends the message to the protocol soft gateway layer, the protocol soft gateway layer routes the downlink parameters to the multi-protocol equipment connecting layer, the multi-protocol equipment connecting layer calls the protocol analyzing layer to encode and construct a downlink message, the downlink message is sent to the client equipment, the multi-protocol equipment connecting layer receives the uplink message of the equipment to acquire equipment data, and the uplink message is decoded by the protocol analyzing layer and finally returns to the memory for storage; the method solves the technical problems of large workload and large working complexity when the acquisition system expands a new protocol and modifies an existing protocol.
Description
Technical Field
The invention relates to the technical field of the Internet of things, in particular to a multi-protocol acquisition method of an Internet of things system.
Background
The internet of things refers to connecting any object with a network through information sensing equipment according to an agreed protocol, and carrying out information exchange and communication on the object through an information transmission medium; the internet of things is applied to a large number of industrial production, various devices can be connected into a network, but the internet of things can be applied to various different types of devices in actual production, and the different devices come from different manufacturers, and the communication protocols of the devices are often different;
the devices are required to be matched and connected with corresponding protocol analysis aiming at the analysis of different devices, and a channel connected with the protocol analysis is required to be arranged aiming at each device in the early stage of system development; however, with the wide introduction of the internet of things technology, more and more manual information acquisition has been replaced by internet of things communication, and the technology of the equipment is faster; the established internet of things acquisition system needs to expand a new protocol or modify the existing protocol content, which often needs to modify a program, reissue and deploy;
the number of the connecting channels arranged for each device is increased along with the increase of the quantity of the devices, the repeatability of each connecting channel on programming is higher, a great amount of redundancy exists, and the workload and the working complexity are higher when the existing protocol content is modified; and the need to publish and deploy the whole program when expanding the new protocol results in the information collection work of the device being forced to be suspended during the system update, so that the workflow is forced to be stopped.
Disclosure of Invention
The invention aims to provide a multi-protocol acquisition method of an Internet of things system, which aims to solve the technical problems of large workload and large working complexity when an acquisition system expands a new protocol and modifies an existing protocol.
In order to achieve the above purpose, the invention adopts the following technical scheme: a multi-protocol acquisition method of an Internet of things system comprises the following steps:
s1, a client sends a request to a service providing layer, after the service providing layer receives the request of the client, the service providing layer verifies parameters of the request, and if the verification is passed, the service providing layer sends information to a bridging layer through a bus;
the request parameters comprise the equipment unique identifiers of corresponding equipment connected with the client, the service providing layer is used for judging whether the request is correct, and the message sent by the service providing layer comprises the equipment unique identifiers of the equipment;
s2, after the bridging layer receives the message, accessing a memory according to the unique identifier of the equipment in the message, inquiring and obtaining the product information of the equipment, and obtaining the corresponding communication protocol information of the equipment by the product strategy of the bridging layer;
the memory comprises product information of the entered equipment, the unique equipment identifier is uniquely matched with the product information, and the product strategy is used for searching out corresponding communication protocol information according to the product information of the equipment;
s3, the bridging layer sends the message carrying the communication protocol information to the equipment protocol soft gateway through the bus, and the equipment protocol soft gateway routes the downlink parameters to the multi-protocol equipment connection layer through the MQTT server according to the message of the bridging layer;
s4, corresponding protocol connection equipment in the multi-protocol equipment connection layer acquires subscribed downlink parameters, the protocol connection equipment connects the protocol analysis layer and the client equipment, corresponding analysis packets in the protocol analysis layer perform coding work, the protocol connection equipment constructs downlink messages, and the downlink messages are sent to the client equipment;
corresponding protocol connection equipment is arranged in the multi-protocol equipment connection layer according to different transmission protocols, one protocol connection equipment is only responsible for the connection work of one transmission protocol, analysis packets of various communication protocols are stored in the protocol analysis layer, one protocol connection equipment can call various analysis packets depending on the transmission protocol, and the protocol connection equipment is connected with equipment of a client side and used for sending downlink messages and receiving uplink messages;
s5, the corresponding equipment of the client receives the downlink message and then responds to the downlink message, and an uplink message is returned, wherein the uplink message comprises data acquired by the client equipment;
s6, the corresponding protocol connection equipment receives the uplink message, transmits the uplink message to a corresponding analysis packet in a protocol analysis layer to perform decoding work, and issues the decoded uplink message to the MQTT server;
s7, the protocol soft gateway layer converts the received analysis content into parameter information defined in the system, and the parameter information is sent to the bridging layer by the bus;
and S8, after the bridging layer receives the parameter information, converting the parameter information into data in the memory, transmitting the data to the memory by the bus, and writing the received data into a storage medium by the memory for storage.
The principle and the advantages of the scheme are as follows: separating the protocol connection service from the protocol analysis service, and respectively taking charge of corresponding service contents by utilizing two layers of a transmission layer and an application layer; the corresponding relation between the client equipment and the multi-protocol equipment connection layer is obtained by a product strategy, and the corresponding protocol connection equipment obtains the client equipment information required to be connected through the transmission of the MQTT, the client equipment and the protocol connection equipment are connected through a bus, when the plurality of client equipment adopt a unified transmission protocol, the plurality of equipment are connected with one protocol connection equipment together, the protocol connection equipment transmits a message to a specific analysis packet, protocol analysis service is developed in a protocol analysis layer, and redundant accumulation of connection paths caused by direct connection of the client equipment and the protocol analysis layer is avoided;
the multi-protocol device connection layer and the protocol analysis layer can be deployed independently, when the modification is existing, the modification is only needed in the corresponding area of the protocol analysis layer, the complexity of program development is reduced, the message transmission data acquisition work of the devices adopting other protocol analysis packages under the same protocol connection device is not affected, the acquisition work of all the devices is not needed to be suspended, and the system expansibility is improved; when a new protocol is added, only the protocol analysis package is added in a protocol analysis layer, and the connection information of the IP and the port of the protocol analysis package is deployed to be communicated with the protocol connection equipment, so that the connected equipment is not required to be modified, and the workload of program development is reduced; and the service partition is managed and serviced in a layered manner, so that the isolation of the system is improved, the modification amount of the program in the process of adding and deleting the protocol is reduced, and the safety of the system is improved by avoiding human error modification.
Preferably, as an improvement, the protocol connection device stores a list of connected devices, the protocol connection device is provided with a device connection threshold, when the number of device connections of the protocol connection device reaches the threshold, new client devices are refused to connect with the protocol connection device, and the new client devices are pushed to the protocol soft gateway layer, the bridging layer and the service providing layer in sequence through the bus, the service providing layer sends a message to notify the protocol connection device corresponding to the protocol to be manually added, and new connection nodes are deployed, so that the new client devices are connected with the new protocol connection device of the protocol.
The improved beneficial effects are that: because one protocol connection device cannot support the connection work of too many devices, a fragmentation strategy is adopted and the threshold value is utilized to manage the client device in a zoning mode, the connection time of the last connected device in the threshold value is used as a distinction limit, the device which establishes connection before the time is the old device, the old device is connected with the old protocol connection device under the communication protocol, the device which establishes connection after the time is the new device, the new device is connected with the new protocol connection device under the communication protocol, the corresponding number of the protocol connection devices is configured according to the specific connection number, overload work of a single protocol connection device is avoided, the connection establishment of the new client device can be carried out by only one protocol connection device under the same transmission protocol is ensured, and the accuracy of the protocol soft gateway layer in sending the message matching protocol connection device is improved;
and the hot plug mechanism is adopted to be connected with the protocol analysis layer, the multi-protocol device connection layer is isolated from the protocol layer, and the connection procedures of the protocol connection devices under the same protocol are completely the same, so that the devices can be deployed independently, and only the protocol analysis service is required to be concerned when the program is developed.
Preferably, as an improvement, the client sends the message to the service providing layer through the bus.
Preferably, as an improvement, the client sends the message to the service providing layer through an HTTP request.
Preferably, as an improvement, when a new protocol is extended and a new transmission protocol is adopted by the new protocol, a new protocol connection device is added and connection nodes are deployed at a multi-protocol device connection layer, corresponding analysis packet data is added at a protocol analysis layer, and connection is established with the new protocol connection device.
Preferably, as an improvement, when a new protocol is extended, and when the new protocol adopts an existing transmission protocol in the multi-protocol connection layer, corresponding analysis packet data is added in a protocol analysis layer, and connection is established with an existing corresponding protocol connection device.
The improved beneficial effects are that: a new protocol expansion mode is provided, the change of the existing program is reduced as much as possible, and the development difficulty and workload are reduced.
Preferably, as an improvement, when the existing protocol content is modified, the corresponding parsing packet data is updated at the protocol parsing layer.
The improved beneficial effects are that: a way of modifying an existing new protocol is provided that only requires attention to the work of the protocol resolution service.
Drawings
FIG. 1 is a flow chart of an embodiment of the present invention.
Detailed Description
The following is a further detailed description of the embodiments:
examples
The multi-protocol acquisition method of the Internet of things system is applied to an Internet of things data acquisition system;
the data acquisition system of the Internet of things comprises a service providing layer, a bridging layer, a protocol soft gateway layer, an MQTT server, a multi-protocol device connecting layer and a protocol analyzing layer.
The service providing layer, the bridging layer and the protocol soft gateway layer are sequentially connected by buses; the client is provided with a universal interface which is connected with the equipment for collecting data.
The service providing layer is used for receiving the request of the client, judging whether the equipment is an equipment bridging layer which is input into the system, and sending information to the bridging layer; the requested parameters include a device unique identification of the corresponding device to which the client is connected and the message sent by the service providing layer includes the device unique identification of the device.
The bridging layer is used for accessing the memory, recording, storing or reading query data from the memory, wherein the memory comprises product information of recorded equipment, and the unique equipment identifier is uniquely matched with the product information; the product strategy is used for searching out corresponding communication protocol information according to the equipment product information, the content of the product information obtained by inquiring in the memory is responded to the product strategy, and the product strategy is further matched.
And the protocol soft gateway layer is used for routing the downlink parameters to corresponding protocol connection equipment of the multi-protocol equipment connection layer so that the equipment connected with the client can establish connection with the corresponding protocol connection equipment.
And the MQTT server is used for transmitting information of the service protocol soft gateway layer and the multi-protocol equipment connection layer and realizing one-to-many matching communication.
The multi-protocol device connection layer is provided with corresponding protocol connection devices according to different transmission protocols, one protocol connection device is only responsible for connection work of one transmission protocol, analysis packets of multiple communication protocols are stored in the protocol analysis layer, and one protocol connection device can call multiple analysis packets depending on the transmission protocol;
the protocol connection device is connected with the device of the client for constructing a downlink message and directly transmitting the downlink message to the specific client device through a device connection channel and receiving an uplink message returned by the client device, wherein the device connection channel can be a transmission layer protocol in a TCP/IP protocol, namely a TCP protocol; the message carries the identifier of the corresponding protocol connection device, and even if a plurality of devices share transmission, a message transmission path can be found according to the identifier of the protocol connection device in the message, so that the downlink message can accurately reach the client device, the uplink message can also accurately reach the multi-protocol analysis device connection layer, and the corresponding protocol analysis packet in the protocol analysis layer is called for decoding;
the protocol analysis layer is used for providing decoding service, and the protocol analysis layer stores protocol analysis packets of a plurality of protocols, and the protocol analysis packets are connected with corresponding transmission protocols in the multi-protocol device connection layer, so that the protocol analysis packets can be called by the protocol connection device.
As shown in fig. 1, a solid arrow in the figure represents downlink transmission, and a dotted arrow in the figure represents uplink transmission, and the multi-protocol acquisition method of the internet of things system comprises the following steps:
s1, a client sends a request to a service providing layer of an acquisition system in a bus or HTTP request mode, after the service providing layer receives the request of the client, the service providing layer verifies parameters of the request, and if the verification is passed, the service providing layer sends information to a bridging layer through the bus;
the HTTP request is a common network communication mode, and HTTP Result is a response Result class and is used for representing a response Result after the HTTP request, and has attribute response codes, information and data;
if the format of the request received by the service providing layer does not accord with the standard, the request is considered to be failed in verification, and the service is terminated at the stage;
s2, after the bridge layer receives the message, accessing a memory according to a unique identifier of the device in the message, namely, iot-service-support in the diagram points to iot-DB from a solid arrow and points to DB from a solid arrow, DB in the diagram is a memory or a database, product information of the device is obtained by inquiring, the product information in the memory is directly output to a product strategy, and the product strategy of the bridge layer is matched to obtain corresponding communication protocol information of the device, namely, iot-links in the diagram points to the product strategy from a solid arrow;
if the product information corresponding to the unique identifier of the equipment is not found in the memory, the same process as the verification is not passed, and the terminating service does not enter the next step;
s3, the bridging layer sends the message carrying the communication protocol information to the device protocol soft gateway through the bus, namely, a product strategy in the figure points to the protocol soft gateway layer through a solid arrow, and the device protocol soft gateway issues downlink parameters to the MQTT server according to the message of the bridging layer, namely, the protocol soft gateway layer points to the MQTT Broker through the solid arrow in the figure;
wherein, in the drawing, a dotted line box in the protocol soft gateway layer indicates that the protocol soft gateway can provide various path connection;
s4, corresponding protocol connection equipment in the multi-protocol equipment connection layer obtains subscribed downlink parameters, namely in the figure, an MQTT Broker points to the multi-protocol equipment connection layer from a solid arrow, the protocol connection equipment is connected with the client equipment through an equipment connection channel, the protocol connection equipment calls corresponding analysis packets in the protocol analysis layer to encode and construct a downlink message, and the multi-protocol equipment connection layer sends the downlink message;
the multi-protocol device connection layer in-layer dotted line frame in the figure is used for representing protocol connection devices corresponding to various transmission protocols, the connection devices can be connected and call specific protocol analysis packages, and the multi-protocol device connection layer in-layer dotted line frame is used for representing various protocol analysis packages written in a program development stage;
s5, the corresponding equipment of the client receives the downlink message and then responds to the downlink message, and an uplink message is returned, wherein the uplink message comprises data acquired by the client equipment;
s6, the corresponding protocol connection equipment receives the uplink message, transmits the uplink message to the corresponding analysis packet in the protocol analysis layer for decoding, and issues the decoded uplink message content to the MQTT server;
s7, the protocol soft gateway layer receives analysis content and converts the analysis content into parameter information defined in a system, and the parameter information is sent to a bridging layer from a bus, namely, in the figure, a multi-protocol device connection layer points to an MQTT Broker from a dotted line end, points to the protocol soft gateway layer from a dotted arrow, and points to iot-links in the bridging layer from a dotted arrow;
and S8, after the bridging layer receives the parameter information, converting the parameter information into data in a memory, sending the data to the memory by a bus, and writing the received data into a storage medium by the memory for storage, namely, iot-links in the figure point to iot-DB from a dotted arrow and then point to DB from the dotted arrow.
When the existing protocol content is modified, corresponding parsing packet data is updated at a protocol parsing layer.
When a new protocol is expanded, when the new protocol adopts a new transmission protocol, new protocol connection equipment is added in a multi-protocol equipment connection layer, connection nodes are deployed, corresponding analysis packet data is added in a protocol analysis layer, and connection is established with the new protocol connection equipment.
When a new protocol is extended, when the new protocol adopts an existing transmission protocol in a multi-protocol device connection layer, corresponding analysis packet data is added in a protocol analysis layer, and connection is established with an existing corresponding protocol connection device.
The protocol connection equipment stores a list of connected equipment, the protocol connection equipment is provided with an equipment connection threshold, when the equipment connection quantity of the protocol connection equipment reaches the threshold, new client equipment is refused to be connected with the protocol connection equipment, and a message is pushed to a protocol soft gateway layer, a bridging layer and a service providing layer in sequence through a bus, the service providing layer sends the message to inform a person to newly add the protocol connection equipment corresponding to the protocol, namely iot-links in the figure point to the service providing layer by a dotted arrow, the service providing layer sends the message to inform the person, and new connection nodes are deployed to enable the new client equipment to be connected with the new protocol connection equipment of the protocol;
if the number of the device connections of the TCP connection device 1 reaches the threshold, the TCP connection device 2 is added, and the TCP connection device 2 does not influence the original TCP connection device 1 to provide connection service for the original connection device because the connection procedures of the TCP connection device 1 and the TCP connection device 2 are identical and deployed independently; the newly-established connected client device establishes connection with the TCP connection device 2, and the new client device is not associated with the original TCP connection device 1.
The foregoing is merely exemplary of the present invention, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present invention, and these should also be regarded as the protection scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (7)
1. The multi-protocol acquisition method of the Internet of things system is characterized by comprising the following steps of:
s1, a client sends a request to a service providing layer, after the service providing layer receives the request of the client, the service providing layer verifies parameters of the request, and if the verification is passed, the service providing layer sends information to a bridging layer through a bus;
the parameters of the request comprise the unique equipment identifier of the corresponding equipment connected with the client, the service providing layer is used for judging whether the request is correct, and the message sent by the service providing layer comprises the unique equipment identifier of the equipment;
s2, after the bridging layer receives the message, accessing a memory according to the unique identifier of the equipment in the message, inquiring and obtaining the product information of the equipment, and obtaining the corresponding communication protocol information of the equipment by the product strategy of the bridging layer;
the memory comprises product information of the entered equipment, the unique equipment identifier is uniquely matched with the product information, and the product strategy is used for searching out corresponding communication protocol information according to the product information of the equipment;
s3, the bridging layer sends the message carrying the communication protocol information to the equipment protocol soft gateway through the bus, and the equipment protocol soft gateway routes the downlink parameters to the multi-protocol equipment connection layer through the MQTT server according to the message of the bridging layer;
s4, corresponding protocol connection equipment in the multi-protocol equipment connection layer acquires subscribed downlink parameters, the protocol connection equipment connects the protocol analysis layer and the client equipment, corresponding analysis packets in the protocol analysis layer perform coding work, the protocol connection equipment constructs downlink messages, and the downlink messages are sent to the client equipment;
corresponding protocol connection equipment is arranged in the multi-protocol equipment connection layer according to different transmission protocols, one protocol connection equipment is only responsible for the connection work of one transmission protocol, analysis packets of various communication protocols are stored in the protocol analysis layer, one protocol connection equipment can call various analysis packets depending on the transmission protocol, and the protocol connection equipment is connected with equipment of a client side and used for sending downlink messages and receiving uplink messages;
s5, the corresponding equipment of the client receives the downlink message and then responds to the downlink message, and an uplink message is returned, wherein the uplink message comprises data acquired by the client equipment;
s6, the corresponding protocol connection equipment receives the uplink message, transmits the uplink message to a corresponding analysis packet in a protocol analysis layer to perform decoding work, and issues the decoded uplink message to the MQTT server;
s7, the protocol soft gateway layer converts the received analysis content into parameter information defined in the system, and the parameter information is sent to the bridging layer by the bus;
and S8, after the bridging layer receives the parameter information, converting the parameter information into data in the memory, transmitting the data to the memory by the bus, and writing the received data into a storage medium by the memory for storage.
2. The internet of things system multiprotocol acquisition method of claim 1, wherein: the protocol connection equipment stores a list of connected equipment, the protocol connection equipment is provided with an equipment connection threshold, when the equipment connection quantity of the protocol connection equipment reaches the threshold, new client equipment is refused to be connected with the protocol connection equipment, and a message is pushed to a protocol soft gateway layer, a bridging layer and a service providing layer in sequence through a bus, the service providing layer sends the message to inform the protocol connection equipment corresponding to the protocol to be manually added, and new connection nodes are deployed, so that the new client equipment is connected with the new protocol connection equipment of the protocol.
3. The internet of things system multiprotocol acquisition method of claim 2, wherein: the client sends the message to the service providing layer via the bus.
4. The internet of things system multiprotocol acquisition method of claim 2, wherein: the client sends the message to the service providing layer through an HTTP request.
5. The internet of things system multiprotocol acquisition method of claim 2, wherein: when a new protocol is expanded, when the new protocol adopts a new transmission protocol, new protocol connection equipment is added in a multi-protocol equipment connection layer, connection nodes are deployed, corresponding analysis packet data is added in a protocol analysis layer, and connection is established with the new protocol connection equipment.
6. The internet of things system multiprotocol acquisition method of claim 2, wherein: when a new protocol is expanded, when the new protocol adopts an existing transmission protocol in a multi-protocol-based connection layer, corresponding analysis packet data is added in a protocol analysis layer, and connection is established with an existing corresponding protocol connection device.
7. The internet of things system multiprotocol acquisition method of claim 2, wherein: when the existing protocol content is modified, corresponding parsing packet data is updated at a protocol parsing layer.
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