CN111934898A - Connection method based on Internet of things multi-protocol virtual gateway - Google Patents
Connection method based on Internet of things multi-protocol virtual gateway Download PDFInfo
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Abstract
The application provides a connection method based on a multi-protocol virtual gateway of the Internet of things, which comprises the following steps: configuring related parameters in a configuration file of the intelligent gateway according to a gateway multi-protocol configuration rule; deploying the configuration file and the operating program of the intelligent gateway into a server, and starting the intelligent gateway through a starting command line; determining that the used protocol conforms to the internet of things equipment configured in the configuration file; and connecting the Internet of things equipment with the intelligent gateway according to the IP of the intelligent gateway server and the intelligent gateway port corresponding to the currently used protocol. The single intelligent gateway simultaneously supports the capacity of keeping long connection of TCP and transmitting data to background application with multiple sensor devices using different Internet of things protocols by configuring gateway configuration files and starting command line parameters, supports protocol expansion, reduces the technical requirements on Internet of things research and development personnel, and saves the gateway research and development time.
Description
Technical Field
The application belongs to the field of the Internet of things, and particularly relates to a connection method based on a multi-protocol virtual gateway of the Internet of things.
Background
The virtual gateway of the internet of things is a bridge for communication between the sensors/devices of the internet of things and a protocol analysis server, and the virtual gateway needs to solve the problems of package detachment and sticking of network data transmission, service stability under a high concurrency scene, data integrity and the like. The traditional internet of things gateway can only support the data transparent transmission of one internet of things communication protocol at the same time, cannot support multiple types of internet of things communication protocols at the same time, cannot expand the protocol when the new internet of things communication protocol needs to be supported, and develops the new internet of things gateway intelligently.
Disclosure of Invention
In order to solve the defects and shortcomings in the prior art, the application provides a connection method based on a multi-protocol virtual gateway of the Internet of things, and a single intelligent gateway can simultaneously support connection with multiple sensor devices using different protocols of the Internet of things and protocol expansion in a gateway configuration file and command line parameter starting mode.
The technical scheme of the application includes:
configuring related parameters in a configuration file of the intelligent gateway according to a gateway multi-protocol configuration rule;
deploying the configuration file and the operating program of the intelligent gateway into a server, and starting the intelligent gateway through a starting command line;
determining that the used protocol conforms to the internet of things equipment configured in the configuration file;
and connecting the Internet of things equipment with the intelligent gateway according to the IP of the intelligent gateway server and the intelligent gateway port corresponding to the currently used protocol.
Optionally, the multiple-protocol configuration rule includes a rule that the intelligent gateway opens different service ports for different protocols and a packet sticky removal processing rule for the packet, and both the rules are configured in a configuration file of the intelligent gateway.
Optionally, the configuration related parameters include a protocol number, a big-end mode parameter, a frame header identifier, an offset, a length field length, a length of the judgment result, whether the length includes a self parameter, a length of other bytes, an open port number, and a heartbeat cycle.
Optionally, the big-end mode parameters include:
setting the parameter of the big end mode to be true, namely setting the big end mode to be true;
and if the big end mode parameter is set to be 0, setting the big end mode parameter to be a small end mode.
Optionally, the judging whether the length includes the parameter of itself is to judge whether the decimal value length analyzed by the length field includes the byte length occupied by the length field itself, and the parameter is set to 1 to be yes, and set to 0 to be no.
Optionally, the other byte length refers to other byte lengths except for the byte length occupied by the length field and the numerical length shown by the length field.
Optionally, the number of the opening port corresponds to the number of the specification one to one.
Optionally, the intelligent gateway supports a function of automatically identifying and closing the zombie connection, and judges whether the gateway connection is the zombie connection according to the heartbeat cycle.
Optionally, the intelligent gateway is deployed on a windows server, Linux, Unix universal server platform, and is developed using JAVA language.
Optionally, the start command line includes three parameters, which are used to configure gateway system related parameters, specifically, a number of an intelligent gateway node, a communication address of a protocol resolution service, and a path where a configuration file of an intelligent gateway is located.
The beneficial effect that technical scheme that this application provided brought is:
the multi-protocol intelligent virtual gateway based on the research and development of the Internet of things can be deployed in a multi-node cluster mode, a single intelligent gateway can simultaneously support connection with multiple sensor devices using different Internet of things protocols and protocol expansion in a gateway configuration file and command line parameter starting mode, only the configuration file needs to be modified, the technical requirements on research and development personnel of the Internet of things are reduced, and the research and development time of the gateway is saved. In addition, the intelligent gateway can keep long connection of the TCP and transparently transmit data to the background application, solves the problem of packet detachment and sticking in mass data network transmission, and supports automatic identification and closing of zombie connection so as to save servers and network resources.
Drawings
In order to more clearly illustrate the technical solutions of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a block diagram of a flow of a multi-protocol intelligent gateway connection method based on the internet of things, which is proposed in the present application;
FIG. 2 is a diagram of an environment in which the intelligent gateway system of the present application is used;
fig. 3 is a flow chart of uplink message transparent transmission of the intelligent gateway device in the present application;
fig. 4 is a flow chart of a downlink message transparent transmission of an intelligent gateway device in the present application.
Detailed Description
To make the structure and advantages of the present application clearer, the structure of the present application will be further described with reference to the accompanying drawings.
Example one
As shown in fig. 1, the application provides a method for connecting an intelligent gateway based on multiple protocols of the internet of things, the intelligent gateway realizes supporting multiple protocols of the internet of things for message transparent transmission simultaneously by opening measures of corresponding service ports with different protocols and configuring a message de-sticky packet processing rule, and the specific process includes:
s1, configuring related parameters in the configuration file of the intelligent gateway according to the gateway multi-protocol configuration rule;
s2, deploying the configuration file and the operating program of the intelligent gateway into a server, and starting the intelligent gateway through a starting command line;
s3, determining that the used protocol conforms to the equipment of the Internet of things configured in the configuration file;
s4, according to the IP of the intelligent gateway server and the intelligent gateway port corresponding to the currently used protocol, the Internet of things equipment is connected with the intelligent gateway.
In this embodiment, the multiple-protocol configuration rule refers to a processing rule for the intelligent gateway to open different service ports and configure the packet to be removed and pasted for messages according to different protocols. The purpose of opening different service ports for different protocols is to ensure that data received by the unified port is a message of the same protocol type; the packet de-sticky processing rule is realized by determining the specific position of the message length field and specifying the header of the message.
In this embodiment, when a developer needs to access a certain type of internet of things through an intelligent gateway or access several types of internet of things simultaneously, first, relevant parameters are configured in the configuration file "yunbaogate. conf" of the intelligent gateway according to a gateway multiple-protocol configuration rule, where the relevant parameters mainly include a protocol number, a big-end mode parameter, a frame header identifier, an offset, a length domain length, and whether the length includes its own parameter, other byte lengths, an open port number, and a heartbeat cycle;
the protocol number is a unique number assigned to different protocols, and the value range is [0,15 ];
the big-end mode parameter is a parameter for configuring whether to store data in a big-end mode, and 1 is set to be true, and 0 is set to be false;
the big-end mode means that the high byte of the data is stored in the low address of the memory, and the low byte of the data is stored in the high address of the memory; the small-end mode means that the high byte of data is stored in the high address of the memory, and the low byte of data is stored in the low address of the memory;
the frame header mark is a parameter for setting a frame header decimal value of the message, if the frame header of the message is not fixed to-1;
the offset is a byte numerical value of the message length domain which is offset from left to right;
the length of the length domain refers to the direct length occupied by the length domain in the message;
judging whether the length contains the parameter of the decimal value is to judge whether the decimal value analyzed by the length field contains the byte length occupied by the length field;
the other byte length refers to the length of other bytes except the length of the length field and the numerical length shown by the length field;
the opening port number refers to a port number opened by the gateway for the current protocol;
the heartbeat cycle refers to a heartbeat message cycle of the gateway, and is used as an important basis for judging whether the connection is a zombie connection or not by the gateway, and the unit is second.
The following is an example of the configuration of the intelligent gateway for the national network 104 protocol and the national network 376.1 protocol:
the national network 104: 1,0,104,1,1,0,0,9811,60
National network 376.1: 2,0,104,1,2,0,5,9812,200
In this embodiment, the edited configuration file and the operating program of the intelligent gateway are deployed to the server at the same time and are started in a Java manner. When the intelligent gateway is started, a start command line is required, wherein parameters in the start command line specify the number of a gateway node, a communication address of protocol resolution service and a path where a configuration file is located, the three parameters are respectively represented by "-n", "-m", and "-f", and the specific meanings are as follows:
-n: the number of the intelligent gateway node is bound with the gateway one by one, and the value range is [1,255 ].
-m: the communication address of the internet of things analysis service can be provided with a plurality of analysis service addresses, and the internet of things intelligent gateway can automatically realize the load balance of the analysis service and support the blue-green issue of the analysis service.
-f: and the path of the configuration file of the intelligent gateway.
For example, a command line parameter "-n 1-m 127.0.0.1:9530-f/opt/yunbaogate. conf" for starting the intelligent gateway in Linux indicates that the number of the current intelligent gateway is 1, the address of the connected internet of things protocol resolution service is 127.0.0.1:9530 ", and the path where the configuration file is located is"/opt/yunbaogate. conf ".
In this embodiment, after the intelligent gateway is started, the internet of things device conforming to the protocol type specified in the configuration file may be connected to the intelligent gateway through the network according to the IP and the specified port of the server where the intelligent gateway is located.
As shown in fig. 2, which is a usage environment diagram of the intelligent gateway system, the intelligent gateway may be deployed on a windows server, Linux, Unix, or other general server platform, and the JAVA language development is used to make the intelligent gateway have a good cross-platform deployment characteristic from the beginning. The intelligent gateway is used as a bridge for communication between the Internet of things sensors/equipment and the protocol analysis server, is connected with a plurality of pieces of equipment using different protocol types through a TCP/IP protocol, and is in uplink message transparent transmission and downlink message transparent transmission with the Internet of things protocol analysis server.
Fig. 3 is a flowchart illustrating the transparent transmission of the uplink message by the intelligent gateway device. After the system is started, configuration files are loaded, the intelligent gateway sequentially establishes Socket connection with a plurality of internet of things protocol services based on TCP/IP, and the internet of things equipment establishes Socket connection with the Yunbao gateway based on TCP/IP. And then, the intelligent gateway receives uplink message data of the Internet of things equipment, judges the legality of the uplink message of the equipment, returns to the previous step if the message is not legal, processes the unpacking and gluing problem of the uplink message in the transmission process if the message is legal, and encapsulates the complete and legal uplink message and writes the uplink message into a lock-free blocking message queue. And after the completion, returning to a link of receiving uplink message data of the Internet of things equipment and repeatedly circulating the steps. The intelligent gateway reads the queue from the non-lock blocking message queue, acquires the packaged uplink message data from the local queue, adds the private message header of the gateway communicating with the Internet of things platform at the head of the uplink message frame of the equipment, and acquires and verifies the validity of the analysis service. If the message is legal, the uplink message is forwarded to the Internet of things protocol analysis service and data is sent; and if not, polling to obtain another Internet of things protocol analysis service and sending data. If the data is successfully sent, returning to a link of acquiring the number of the packaged uplink messages from the queue, and repeatedly circulating the steps; and if the data transmission fails, returning to a link of polling to obtain another Internet of things protocol analysis service. And completing the transparent transmission of the uplink message of the intelligent gateway equipment.
Fig. 4 is a flow chart of transparent transmission of a downlink message of an intelligent gateway device. After the system is started, configuration files are loaded, the intelligent gateway sequentially establishes Socket connection with a plurality of internet of things protocol services based on TCP/IP, and the internet of things equipment establishes Socket connection with the Yunbao gateway based on TCP/IP. And then, the intelligent gateway receives the downlink message data of the Internet of things protocol analysis service, verifies the legality of the downlink message, returns to the previous step if the message is not legal, and solves the unpacking and sticking problems of the downlink message in the transmission process if the message is legal. And intercepting and analyzing the downlink message header, acquiring and packaging the information of the Internet of things equipment, and writing the information into a lock-free blocking message queue. And after the message sending process is finished, returning to a link of receiving downlink message data of the protocol analysis service of the Internet of things and repeatedly circulating the steps. The intelligent gateway reads the queue from the non-lock blocking message queue, acquires the encapsulated downlink message data from the local queue, queries the session between the equipment and the Yunbao gateway according to the IP information of the equipment, and checks whether the TCP link is normal. If the data is normal, sending the data to the Internet of things equipment; and if the current equipment is abnormal, recording the log, and deleting the corresponding cache resources occupied by the current equipment. Judging whether the data is successfully sent to the Internet of things equipment, if so, returning to a link of acquiring the encapsulated downlink message data from the queue and repeating the steps; and if the sending fails, returning a log record, and deleting the link of the corresponding cache resource occupied by the current equipment. And completing the transparent transmission of the downlink message of the intelligent gateway equipment.
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 connection method based on a multi-protocol virtual gateway of the Internet of things is characterized by comprising the following steps:
configuring related parameters in a configuration file of the intelligent gateway according to a gateway multi-protocol configuration rule;
deploying the configuration file and the operating program of the intelligent gateway into a server, and starting the intelligent gateway through a starting command line;
determining that the used protocol conforms to the internet of things equipment configured in the configuration file;
and connecting the Internet of things equipment with the intelligent gateway according to the IP of the intelligent gateway server and the intelligent gateway port corresponding to the currently used protocol.
2. The method according to claim 1, wherein the multi-protocol configuration rules include a rule that the smart gateway opens different service ports for different protocols and a configuration message de-sticky-packaging processing rule, both of which are configured in a configuration file of the smart gateway.
3. The method according to claim 1, wherein the configuration-related parameters include protocol number, big-end mode parameter, frame header identifier, offset, length field length, whether the length includes its own parameter, length of other bytes, open port number, and heartbeat cycle.
4. The method according to claim 3, wherein the big-end mode parameters include:
setting the parameter of the big end mode to be true, namely setting the big end mode to be true;
and if the big end mode parameter is set to be 0, setting the big end mode parameter to be a small end mode.
5. The connection method based on the internet of things multi-protocol virtual gateway according to claim 3, wherein the judging whether the length contains the parameter thereof is that whether the decimal value length analyzed in the length domain contains the byte length occupied by the length domain itself, and the parameter is set to 1 as yes and set to 0 as no.
6. The method according to claim 3, wherein the other byte lengths refer to byte lengths other than the byte length occupied by the length field and the numerical length indicated by the length field.
7. The method according to claim 3, wherein the number of the open port corresponds to the protocol number one to one.
8. The method according to claim 3, wherein the intelligent gateway supports a function of automatically recognizing and closing zombie connections, and determines whether the gateway connection is a zombie connection according to the heartbeat cycle.
9. The method according to claim 1, wherein said intelligent gateway is deployed on windows server, Linux, Unix universal server platform, developed using JAVA language.
10. The method as claimed in claim 1, wherein the start command line includes three parameters for configuring gateway system related parameters, specifically, the number of intelligent gateway node, the communication address of protocol resolution service, and the path of configuration file of intelligent gateway.
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Application publication date: 20201113 |