CN110138852A - A kind of long-range connection method, remote connecting device and remotely connect system - Google Patents

Abstract

The invention discloses a kind of long-range connection methods, remote connecting device and long-range connection system, it is sent to passive connection request side by the first IP address and first end slogan for obtaining active connection request side, and the second IP address of passive connection request side and second end slogan are sent to active connection request side, and according to the first IP address, first end slogan, second IP address and second end slogan set up the data connection channel for being connected to active connection request side and passive connection request side, it solves prior art medium-long range connection communication to need by poor for applicability caused by transit server, delay length, technical problem more than occupying system resources and bandwidth.

Description

A remote connection method, remote connection device and remote connection system

technical field

The invention relates to the technical field of remote connection debugging, in particular to a remote connection method, a remote connection device and a remote connection system.

Background technique

When an industrial failure occurs, debuggers can perform troubleshooting through remote debugging, thereby saving time and effort. In the prior art, there are mainly the following methods for remote debugging:

1. Remote desktop, such as QQ software, etc.;

2. The remote operation and maintenance system based on the cloud platform, the cloud platform acts as a transit agent, and all remote debugging data is forwarded through the agent, and now industrial equipment and remote maintenance personnel only communicate with the agent of the cloud platform;

3. Based on the VPN connection, a VPN connection is established between the industrial equipment and the remote maintenance personnel, and the communication is carried out in the VPN.

However, there are relatively large shortcomings in the above-mentioned several methods. Among them, the first method is not necessarily applicable to general remote desktop software because the software and programs of industrial field equipment are basically dedicated; All communication data needs to be transferred by the platform. When a large number of devices need to be maintained and debugged, the burden on the platform is heavy, and the transfer will lead to the problem of increased delay; the third method consumes more system resources and bandwidth due to the VPN connection , and reduce the transmission speed and stability.

Therefore, how to solve the technical problems caused by the above connection methods has become an urgent need in this field.

Contents of the invention

The present invention aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to provide a remote serial port connection method with high transmission speed, less consumption of system resources and bandwidth, and strong applicability.

Therefore, the second object of the present invention is to provide a remote connection device with data acquisition and data transmission functions.

Therefore, the third object of the present invention is to provide a remote connection system with high transmission speed, less consumption of system resources and bandwidth, and strong applicability.

The technical scheme adopted in the present invention is:

In a first aspect, the present invention provides a remote serial port connection method, which includes the following steps:

S1. Obtain connection request information, and obtain the first IP address and first port number of the active connection request side according to the connection request information;

S2. Send the first IP address and the first port number to the passive connection request side;

S3. Obtain connection response information, and obtain a second IP address and a second port number of the passive connection request side according to the connection response information;

S4. Send the second IP address and the second port number to the active connection request side;

S5. Establish a data connection channel according to the first IP address, the first port number, the second IP address, and the second port number, and the data connection channel is used to connect the active connection request side and The passive connection request side.

Further, the step S1 specifically includes: the active connection request side obtains the first IP address and the first port number after undergoing NAT conversion; the step S3 specifically includes: the passive connection request side passes through the NAT The second IP address and the second port number are obtained after conversion.

Further, after the step S2, it also includes the steps of:

S21. The passive connection requesting side sends a connection verification message to the active connection requesting side according to the received first IP address and the first port number.

Further, the active connection requesting side is a client remote debugging module, and the passive connection requesting side is an on-site remote debugging module; or, the active connection requesting side is an on-site remote debugging module, and the passive connection requesting side is a client Terminal remote debugging module.

In a second aspect, the present invention provides a remote connection device, which is applied to the remote connection method, including:

A data acquisition module, configured to acquire the first IP address and first port number of the active connection request side, and acquire the second IP address and second port number of the passive connection request side;

A data transmission module, configured to transmit the first IP address and the first port number to the passive connection request side, and transmit the second IP address and the second port number to the active connection request side;

A control processing module, configured to control opening or closing of the data connection channel according to the first IP address, the first port number, the second IP address and the second port number.

In a third aspect, the present invention provides a remote serial port connection system, which includes the remote connection device, an Internet link channel module, an on-site remote debugging module, and a client remote debugging module; the Internet link channel module includes the The client remote debugging module is connected to the data connection channel of the on-site remote debugging module, and the client remote debugging module and the on-site remote debugging module are respectively connected to the Internet link channel module; the Internet link The channel module is connected with the remote connection device, and the remote connection device is used to control the opening or closing of the data connection channel.

Further, the on-site remote debugging module includes a network interface, a serial interface and a data converter, one end of the network interface is connected to the Internet link channel module, and one end of the serial interface is connected to an external field device for Remote debugging; the other end of the network interface and the other end of the serial port interface are both connected to the data converter for data conversion.

Further, the client remote debugging module can use a software virtual serial port interface.

Further, the remote connection device may be a server.

The beneficial effects of the present invention are:

The present invention sends the first IP address and the first port number of the active connection request side to the passive connection request side by obtaining the first IP address and the first port number of the passive connection request side, and sends the second IP address and the second port number of the passive connection request side to the active connection request side, and according to The first IP address, the first port number, the second IP address and the second port number establish a data connection channel connected to the active connection request side and the passive connection request side, which solves the need for remote connection communication in the prior art to be transferred through the server The resulting technical problems are poor applicability, long delay, and large occupation of system resources and bandwidth; a remote connection method with fast transmission speed, less consumption of system resources and bandwidth, and strong applicability is provided.

Another beneficial effect of the present invention is:

The present invention is provided with an Internet link channel module, a remote connection device, an on-site remote debugging module and a client remote debugging module, and the remote connection device obtains the IP address and port number of the client remote debugging module, and obtains the IP address and port number, and open the data connection channel of the client remote debugging module and the on-site debugging module in the Internet link channel module according to the information obtained, so that the client remote debugging module and the on-site debugging module communicate directly, which solves the prior art Medium and long-distance connection communication needs to be transferred through the server to cause technical problems such as poor applicability, long delay, and high system resource and bandwidth occupation; it provides a remote connection system with fast transmission speed, low consumption of system resources and bandwidth, and strong applicability.

Description of drawings

Fig. 1 is a block diagram of a specific embodiment of a remote connection system in the present invention;

Fig. 2 is a flow chart of a specific embodiment of a remote connection method in the present invention.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

As shown in Figure 1, the remote connection system in the present invention includes a client remote debugging module, a remote connection device, an Internet link channel module and an on-site remote debugging module; wherein, the Internet link channel module includes a client remote debugging module connection To the data connection channel of the on-site remote debugging module, the remote connection device includes a data acquisition module, a control processing module and a data transmission module, and the data acquisition module and the data transmission module are connected to the control processing module, so that the control processing module controls the data acquisition module and the data transmission module The work of the data transmission module; the data acquisition module is connected with the Internet link channel module to obtain data information, and the data transmission module is connected with the Internet link channel module to transmit data information; the control processing module is connected with the Internet link channel module to control the Internet In the link channel module, the client remote debugging module is connected to the opening or closing of the data connection channel of the on-site remote debugging module. The on-site remote debugging module includes a network interface, a serial port interface and a data converter, and the network interface and the serial port interface are connected with the data converter for data conversion. Specifically, the client remote debugging module and the on-site remote debugging module are respectively connected to the Internet link channel module, the serial port interface of the on-site remote debugging module is connected to the external field equipment, and the control processing module in the remote connection device controls the data connection channel to open so that The client remote debugging module directly communicates with the on-site remote debugging module through the data connection channel, and then performs debugging operations on external field devices, which solves the problem of poor applicability, long delay, and Technical issues that take up a lot of system resources and bandwidth.

The implementation process of the remote connection system is described below through a specific embodiment:

Referring to Fig. 1, the client remote debugging module can be a software virtual serial port interface, the remote connection device can be a server, and the Internet link channel module is an Internet network; when the client remote debugging module Internet network sends connection request information to the server (i.e. The terminal remote debugging module is the active connection request side), which obtains the first IP address and first port number after NAT conversion, and then transmits it to the server through the Internet network, and the server passes the obtained first IP address and first port number through the Internet The network is transmitted to the network interface of the on-site remote debugging module. After receiving the first IP address and the first port number, the on-site remote debugging module sends a connection response message to the server, which obtains the second IP address and the second port number after NAT conversion. And the second IP address and the second port number are transmitted to the server through the Internet network, and then transmitted to the remote debugging module of the client through the server. At the same time, the on-site remote debugging module sends the The client remote debugging module sends a connection verification message to respond to the ongoing connection and initially verify whether the data connection channel can communicate, ensuring the feasibility of establishing a data connection channel. If the client remote debugging module can receive the connection verification message, then It proves that the establishment of the data connection channel can be successful. If the client remote debugging module cannot receive the connection verification message, it proves that the establishment of the data connection channel cannot be successful, and the client remote debugging module needs to resend the connection request information. According to the received first IP address, first port number, second IP address and second port number, the server establishes a data connection channel that does not pass through the server but only through the Internet network. After the data connection channel is established, the client remotely debugs The communication data of the module and the on-site remote debugging module are no longer transferred through the server. At this time, the client-side remote debugging module and the on-site remote debugging module are regularly connected or kept connected to the server, so as to re-establish the data connection when the next remote connection is made. The channel makes the data transmission between the two ends faster, consumes less system resources and bandwidth, and has stronger applicability. When debugging the field device, only need to connect the field device with the serial port interface of the field remote debugging module through the serial port, then the client remote debugging module can realize the function of remotely debugging the field device. It should be noted that, in this implementation, the on-site remote debugging module can also be used to actively initiate a connection request, and its implementation process is basically the same as the above-mentioned process of the client remote debugging module actively initiating a connection request, and will not be repeated here.

With reference to Fig. 2, a kind of remote connection method among the present invention, it comprises the following steps:

S1. Obtain connection request information, and obtain the first IP address and first port number of the active connection request side according to the connection request information;

S2. Send the first IP address and the first port number to the passive connection request side;

S3. Obtain connection response information, and obtain the second IP address and second port number of the passive connection request side according to the connection response information;

S4. Send the second IP address and the second port number to the active connection request side;

S5. Establish a data connection channel according to the first IP address, the first port number, the second IP address and the second port number, and the data connection channel is used to connect the active connection request side and the passive connection request side.

Wherein, step S1 specifically includes: the active connection request side obtains the first IP address and the first port number after NAT conversion; step S3 specifically includes: the passive connection request side obtains the second IP address and the second port number after NAT conversion.

After step S2, step S21 is also included. The passive connection request side sends a connection verification message to the active connection request side according to the obtained first IP address and first port number, so as to respond to the ongoing connection and initially verify whether the data connection channel can communicate. , ensuring the feasibility of establishing a data connection channel.

The remote connection method of the present invention and the implementation process principle of the above-mentioned remote connection system can refer to each other and correspond to each other, and will not be described in detail here.

The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the described embodiments, those skilled in the art can also make various equivalent deformations or replacements without violating the spirit of the present invention , these equivalent modifications or replacements are all within the scope defined by the claims of the present application.

Claims (9)

1. a kind of long-range connection method, which comprises the following steps:

S1, connectivity request message is obtained, and obtains the first IP address of active connection request side according to the connectivity request message With first end slogan；

S2, first IP address and the first end slogan are sent to passive connection request side；

S3, connection response information, and the 2nd IP of the passive connection request side according to the connection response acquisition of information are obtained Address and second end slogan；

S4, second IP address and the second end slogan are sent to active connection request side；

S5, number is established according to first IP address, the first end slogan, second IP address and the second end slogan According to interface channel, the data connection channel is for connecting active connection request side and the passive connection request side.

2. long-range connection method according to claim 1, which is characterized in that the step S1 is specifically included: the active Connection request side obtains first IP address and the first end slogan after NAT is converted；The step S3 is specifically included: The passive connection request side obtains second IP address and the second end slogan after NAT is converted.

3. long-range connection method according to claim 1 or 2, which is characterized in that further comprised the steps of: after the step S2

S21, the passive connection request side based on the received first IP address and the first end slogan toward the active Connection request side sends connectivity verification message.

4. long-range connection method according to claim 1 or 2, which is characterized in that active connection request side is client Remote debugging module is held, the passive connection request side is live remote debugging module；Alternatively, active connection request side is Live remote debugging module, the passive connection request side are client remote debugging module.

5. a kind of remote connecting device, which is characterized in that it is applied to the described in any item long-range connection methods of Claims 1-4, Include:

Data acquisition module for obtaining the first IP address and first end slogan of active connection request side, and obtains institute State the second IP address and second end slogan of passive connection request side；

Data transmission module, is used for transmission first IP address and first end slogan is transmitted to the passive connection request side, And second end slogan described in second IP address is transmitted to active connection request side；

Processing module is controlled, for according to first IP address, the first end slogan, second IP address and described the Two-port netwerk number controls opening or closing for the data connection channel.

6. a kind of long-range connection system, which is characterized in that including remote connecting device as claimed in claim 5, interconnection network chain Paths module, live remote debugging module and client remote debugging module；The Internetwork link channel module includes institute The data connection channel that client remote debugging module is connected to the live remote debugging module is stated, the client is remote Journey debugging module, the live remote debugging module are connect with the Internetwork link channel module respectively；The interconnection network chain Paths module is connect with the remote connecting device, and the remote connecting device is for controlling beating for the data connection channel On or off is closed.

7. long-range connection system according to claim 6, which is characterized in that the scene remote debugging module includes network Interface, serial interface and data converter, one end of the network interface is connect with the Internetwork link channel module, described One end of serial interface is connect with external field device to carry out remote debugging；The other end of the network interface, the string The other end of mouth interface is connect to carry out data conversion with the data converter.

8. long-range connection system according to claim 6 or 7, which is characterized in that the client remote debugging module can Use software virtual serial port interface.

9. long-range connection system according to claim 6, which is characterized in that the remote connecting device can be server.