CN115378990A

CN115378990A - Automatic discovery network informatization teaching demonstration method based on 4G/5G communication system

Info

Publication number: CN115378990A
Application number: CN202210948581.6A
Authority: CN
Inventors: 靳雅群
Original assignee: Beijing Union University
Current assignee: Beijing Union University
Priority date: 2022-08-09
Filing date: 2022-08-09
Publication date: 2022-11-22
Anticipated expiration: 2042-08-09
Also published as: CN115378990B

Abstract

The invention discloses an automatic discovery network informatization teaching demonstration method based on a 4G/5G communication system, which comprises the following steps: the client initially records the telephone number of the server corresponding to the client; the client sends the information containing the telephone number, the terminal type and the IP address of the client to a server corresponding to the client; the server identifies whether the client can be accepted or not according to the telephone number in the received message; if the identification result is yes, the server sends the telephone number, the terminal type and the IP address of the server to the client; and the client sends a connection request to the server according to the received IP address. The invention has low deployment cost and wider application range.

Description

Automatic discovery network informatization teaching demonstration method based on 4G/5G communication system

Technical Field

The invention relates to the technical field of communication, in particular to an automatic discovery network informatization teaching demonstration method based on a 4G/5G communication system.

Background

Laboratory informatization is a worldwide acknowledged laboratory development direction, most of the existing laboratories are relatively independent, and a related informatization teaching demonstration system is lacked. At present, one mode of informatization interconnection among institutions is to establish network physical connection among institutions and establish a wireless campus network, and the mode has the main defect that the application range is limited and the mode cannot be applied to an environment outside the institutions. Secondly, the cost is high, taking Beijing Union university as an example, a wireless campus network crossing over more than twenty colleges of Union university is constructed, twenty physical networks among the colleges need to be established, the construction cost is high, and the effect is not good. The other method is to build an internet server and cooperate with a 4G/5G terminal to jointly form a network, a special telecommunication line needs to be laid in the mode, a main standby server needs to be specially laid, the cost of a leased line needs to be fixedly paid every year, reliable service can be provided, and the total maintenance cost is high.

The conventional 2G/3G mobile network solutions have the following problems, which make the automatic discovery network mentioned in the present system difficult to implement, and therefore the present invention is directed to a 4G/5G based network.

1. The network speed provided by the 2G/3G network is slow, the cost is high, the terminal computing capability is poor, and the requirement of teaching demonstration is not met. The 4G/5G network greatly improves the problems after being applied.

2. The 2G/3G network uses IPV4 address, the public network address is not enough distributed, so that only the private network address can be distributed, and the IP address in each mobile honeycomb can be repeated. Such as address duplication of beijing and shanghai. The introduction of IPV6 addresses in 4G/5G networks, each terminal IP address being globally unique, is the fundamental reason that the present invention can be practiced.

In addition, the 2G/3G/4G/5G network has a common problem in that IP addresses of the mobile terminal and the server are dynamically changed, are addresses allocated by an operator, and the allocation manner is not changeable. This problem can be solved by assigning a fixed address in a fixed network, but in a mobile network, it is relatively difficult to solve the problem because the assignment pattern is fixed by the operator and cannot be changed. The traditional solution method determines whether the terminal and the server belong to the system or not according to the IP address, and determines whether the service is provided or not, and the efficiency of the method in a mobile network is low, thereby influencing the stability of the system.

Disclosure of Invention

The invention aims to provide a method for quickly constructing an information teaching demonstration system by using common mobile internet equipment such as a mobile phone, a PAD (PAD application provider), a camera, VR (virtual reality) glasses and the like, and solve the problem of difficulty in interconnection caused by dynamic change of IP addresses of a terminal (client) and a server in the process.

In order to achieve the purpose, the invention adopts the following technical scheme:

A4G/5G communication system-based automatic discovery network informatization teaching demonstration method is applied to an informatization teaching demonstration system, the system comprises a plurality of servers, each server corresponds to a plurality of subordinate clients, and the servers and the clients communicate through a 4G/5G network;

the method comprises the following steps:

the client initially records the telephone number of the server corresponding to the client;

the client sends the information containing the telephone number, the terminal type and the IP address of the client to a server corresponding to the client;

the server identifies whether the client can be accepted or not according to the telephone number in the received message;

if the identification result is yes, the server sends the telephone number, the terminal type and the IP address of the server to the client;

and the client sends a connection request to the server according to the received IP address.

In a preferred embodiment, the servers are authenticated by using third-party instant messaging software and a server group list is established;

after the step of "the server authenticating whether the client can be accommodated according to the phone number in the received message", the method further comprises:

if the identification result is negative, the server searches for a server capable of receiving the client by inquiring the server group list and takes the server as a substitute server;

the server sends the telephone number, the terminal type and the IP address corresponding to the substitute server to the client;

and the client sends a connection request to the substitute server according to the received IP address.

In a preferred embodiment, before the step of "the server identifies whether the client can be accepted according to the telephone number in the received message", the method further comprises:

and the server identifies whether the client belongs to the administration list of the client.

In a preferred embodiment, after the step of the client sending a connection request to the server according to the received IP address, the method further comprises:

the server receives the connection request and sends confirmation information to the client;

after receiving the confirmation message, the client sends an access authentication command corresponding to the own telephone number and the IP address to the server;

the server judges whether the client is a legal client or not after receiving the authentication command;

if yes, a reverse access authentication command of the telephone number and the IP address corresponding to the server is sent to the client;

the client judges whether the server is a legal server or not according to the received reverse access authentication command;

and if so, the client establishes communication connection with the server.

In a preferred embodiment, after the step of "the server sends its own phone number, terminal type and IP address to the client", the method further comprises:

and the client verifies whether the received telephone number of the server is the same as the initially recorded telephone number or not, and updates the recorded telephone number of the server when the received telephone number of the server is different from the initially recorded telephone number.

In a preferred embodiment, the method further comprises:

the server records information sent by the client to form a session handle and sends the session handle to the client;

the client records the information sent by the server to form session information;

and the client monitors the dynamic port of the server according to the session handle sent by the server.

In a preferred embodiment, the method further comprises:

when the IP address of the server changes, the server updates the server group list and simultaneously sends the information of the telephone number, the terminal type and the IP address of the server to other servers;

and after receiving the information, the other servers send the information of the telephone number, the terminal type and the IP address of the other servers to the server.

In a preferred embodiment, the method further comprises:

the server sends an IP address replacement message to a subordinate client;

and after receiving the message, the client judges whether the address change of the server is credible according to the session information of the client, and sends a connection request to the server according to the IP address in the message when the judgment result is credible.

In a preferred embodiment, the subordinate client includes a first client and a second client, both the first client and the second client have a short message intercommunication function, the first client supports instant messaging software, and the second client does not support instant messaging software.

In a preferred embodiment, the servers use the UDP protocol to interact with each other for system table information and provide load balancing for each other.

The invention has the advantages that: the teaching demonstration method for automatically discovering the network informationization based on the 4G/5G communication system solves the problem that the interconnection is difficult due to the dynamic change of the IP addresses of the terminal and the server, has low deployment cost, can realize teaching effect in a network coverage range, has wider application range, can be applied to the informatization of a laboratory in a campus, and solves the problems of asset management, experiment progress control, electronization handover and the like in the laboratory.

Drawings

FIG. 1 is a schematic diagram of the main steps of an automatic discovery network informatization teaching demonstration method based on a 4G/5G communication system;

FIG. 2 is a schematic diagram illustrating steps of bidirectional authentication between a server and a client;

FIG. 3 is a flow chart of updating IP addresses with other servers when the IP addresses of the servers are replaced;

fig. 4 shows a flow of updating an IP address with a subordinate client when a server IP address is replaced.

Detailed Description

The invention is described in further detail below with reference to the figures and examples.

A good information-based teaching demonstration system can at least achieve the following points: firstly, the coverage range is wide, and all college laboratories in a school can be interconnected and communicated together at the same time; secondly, each terminal (client) can move, the moving range is not limited to the school, the terminal also comprises a field training base and an off-school training base, and teachers can participate in guidance anytime and anywhere; thirdly, the software is convenient to deploy and low in cost; fourthly, the teacher can conveniently master the position of the terminal used by the student to obtain information such as experiment progress. Based on the above, the invention provides an automatic discovery network informatization teaching demonstration method based on a 4G/5G communication system, which is applied to an informatization teaching demonstration system, and compared with the traditional system, the automatic discovery network informatization teaching demonstration method is easier to deploy, lower in cost and wider in coverage range. The following describes in detail the method for demonstrating teaching of automatically discovering network information based on 4G/5G communication system according to this embodiment with reference to the accompanying drawings.

Referring to table 1, the automatic discovery network informatization teaching demonstration method based on the 4G/5G communication system provided by the embodiment is applied to an informatization teaching demonstration system, the system includes a plurality of servers, each server corresponds to a plurality of subordinate clients, and the servers and the clients communicate through the 4G/5G network. For example, as shown in table 1, the system includes a server 1 and a server 2, the subordinate clients corresponding to the server 1 include a client a, a client B, a client C, and a client D, and the subordinate clients corresponding to the server 2 include a client M, a client N, a client O, a client P, and a client Q. In order to guarantee the service quality, the server is selected to be powered on forever, and the client can access the network subsequently. It should be noted that the system only uses the server 1 and the server 2 as an example, and the system may further include a greater number of servers, and the number of servers is not limited. The number of subordinate clients per server is likewise not limiting. The server can be a teacher machine, and the teacher machines can back up each other. And the terminal (client) used by the teacher can be a mobile phone of the teacher or a device distributed by a laboratory.

TABLE 1

The servers are authenticated using third party instant messaging software (e.g., weChat, payment treasures, etc.) and a server group list (i.e., an overall list of the above-mentioned files) is established. The communication efficiency is high and the log can be checked by adopting the instant messaging software. The servers use UDP protocol (without confirmation after transmission) to mutually exchange system table information and mutually provide load balance.

The client comprises a first client and a second client, the first client and the second client both have a short message intercommunication function, the first client supports instant messaging software, and the client is similar to the server and can be a mobile phone, a notebook computer, a tablet computer and the like. The second client does not support instant messaging software, such as: camera, unmanned equipment, VR equipment etc.. The information teaching demonstration system comprises the equipment, the two clients are considered together, and the supplementary measures when the instant messaging software crashes are supported, and the second client can adopt short message intercommunication, in other words, the equipment has own telephone numbers. In order to simplify the times of sending short messages, the following information-based teaching demonstration method is designed.

Referring to fig. 1, fig. 1 illustrates the main steps of an automatic discovery network informatization teaching demonstration method based on a 4G/5G communication system. As shown in fig. 1, the method for demonstrating the automatic discovery network informatization teaching based on the 4G/5G communication system provided by the embodiment includes:

step S1: the client initially records the telephone number of its corresponding server. For example, the client C initially records the telephone number of the server 1, and writes it in the own software internal configuration table.

Step S2: the client sends the information containing the telephone number, the terminal type and the IP address of the client to the corresponding server. For example, the client C starts to transmit information such as its own telephone number, terminal type, IP address, and the like to the server 1. The terminal type comprises a server and a client, and the terminal type of the client C is 'client'.

And step S3: the server identifies whether the client can be accepted according to the telephone number in the received message. For example, the server 1 records the administration list of the client under its own administration, and queries the administration list according to the received telephone number to determine whether the client C belongs to the administration list. Alternatively, the server 1 may have a limited number of clients to be admitted, and may determine whether the admission margin is sufficient to admit the client by the authentication. If yes, go to step S4, otherwise go to step S6.

And step S4: and the server sends the telephone number, the terminal type and the IP address of the server to the client. Wherein the terminal type of the server is "server". For example, the server 1 transmits its own telephone number, terminal type, and IP address to the client C.

Step S5: and the client sends a connection request to the server according to the received IP address. For example, the client C sends a connection request to the server 1 according to the received IP address

Step S6: the server looks for a server that can accommodate the client by querying the server group list and acts as a replacement server. I.e. to select other servers with margins instead.

Step S7: and the server sends the telephone number, the terminal type and the IP address corresponding to the substitute server to the client. For example, if the server 2 is used instead, the server 1 sends the telephone number, the terminal type, and the IP address corresponding to the server 2 to the client C instead.

Step S8: and the client sends a connection request to the substitute server according to the received IP address. For example, client C sends a connection request to the alternate server 2

Step S9: the client verifies whether the received telephone number of the server is the same as the initially recorded telephone number or not, and updates the recorded telephone number of the server when the received telephone number of the server is different from the initially recorded telephone number. Specifically, when the IP address of the server changes, the client updates the recorded server address, for example, by updating a configuration table in the software of the client.

The server and the server are connected by data, and system list information is updated by interaction. In order to avoid that both the client and the server are falsely assumed to be fraudulently, the step of bidirectional authentication is accessed in the connection process of both the client and the server. Referring to fig. 2, fig. 2 illustrates the main steps of a two-way authentication between a server and a client. Namely, after the step that the client sends the connection request to the corresponding server according to the received IP address, the method further comprises the following steps:

step S11: the server receives the connection request and sends confirmation information to the client. For example, the server 1 transmits the confirmation information to the client C after receiving the connection request transmitted from the client C.

Step S12: and after receiving the confirmation message, the client sends an access authentication command corresponding to the own telephone number and the IP address to the server. For example, after receiving the confirmation message, the client C sends an access authentication command corresponding to the telephone number and the IP address of the client C to the server 1.

Step S13: and the server judges whether the client is a legal client after receiving the authentication command, if so, the step S14 is carried out, and if not, the connection is stopped. For example, the server 1 determines whether the client C is a valid client after receiving the authentication command.

Step S14: and sending a reverse access authentication command of the telephone number and the IP address corresponding to the server to the client. For example, a reverse access authentication command of the telephone number and IP address corresponding to the server 1 is sent to the client C.

Step S15: the client judges whether the server is a legal server or not after receiving the reverse access authentication command; if yes, go to step S16, otherwise stop the connection. For example, the client C determines whether the server 1 is a valid server after receiving the reverse access authentication command.

Step S16: the client-side establishes communication connection with the server. For example, the client C establishes a communication connection with the server 1.

The server records the information sent by the client to form a session handle (handle) and sends the session handle (handle) to the client; the client records the information sent by the server to form session information; the client monitors the dynamic port of the server according to the session handle sent by the server (the port is calculated by the session handle and the timestamp, each terminal is different, and the terminal is started differently each time).

The information-based teaching demonstration system should avoid IP address updating as much as possible, and the specific method is to reduce the mobile use of equipment. In a mobile network, the replacement of an IP address will only occur if the device moves to the address edge of the core network. Frequent IP address changes only occur during repeated handoffs back and forth between the two core networks. After the information-based teaching demonstration system is established, the position change of the server is reduced as much as possible so as to reduce or avoid the IP address updating. The client IP address updating influence is small, and a user holding the client can move. In the system design, a device at a fixed position is used as a server as much as possible. And after the IP address of the client is updated, directly going to the normal connection process. And refreshing the client side stand-alone in the disconnected state. After the IP address is updated, the server performs the following steps with reference to fig. 3 and 4:

step S21: when the IP address of the server changes, the server updates the server group list and simultaneously sends the information of the telephone number, the terminal type and the IP address of the server to other servers;

step S22: and after receiving the information, the other servers send the information of the telephone number, the terminal type and the IP address of the other servers to the server.

Step S31: the server sends the message of IP address replacement to the subordinate client;

step S32: after receiving the message, the client judges whether the address change of the server is credible according to the session information of the client, and sends a connection request to the server according to the IP address in the message when the judgment result is credible.

Examples are as follows: suppose that the server 1 belongs to four clients, namely, a, B, C and D, and also has a server 2, a server 3 and the like, and is responsible for more clients. The IP address of the server 1 changes. At this time, the clients a, B, C, and D cannot determine that their servers are disconnected. A timeout period is required to wait, and the message needs to be sent by short message because the short message has a larger delay and a longer waiting time.

After the IP address is changed, the server 1 updates the system table information in the instant communication software and sends the information.

The server 1 transmits its own telephone number and terminal type IP address to the server 2 and the server 3 using UDP.

After receiving the authentication information, the server 2 and the server 3 send the information (telephone number, terminal type and IP address) of the server to the server 1 to form bidirectional authentication.

The server 1 sends a server IP address change message to the corresponding ports of the clients a, B, C, D using UDP according to the information in the session.

After receiving the server IP address change message, the clients a, B, C, and D determine whether the address change of the server 1 is authentic according to the session information, and if it is determined that the address change is correct (mainly determining the timestamp, the previous IP address of the server 1, the current IP address, and the session port), initiate a connection request to the new IP address of the server 1.

After initiating the connection request, the step of completing the access authentication is repeated. Therefore, the time required by the client to judge the server to be offline can be reduced based on the process. Based on the short-time average 30 seconds judged by the terminal, the time consumption of about 25 seconds can be reduced by updating the IP address of the server every time, so that the network is more stable.

In summary, according to the automatic discovery network informatization teaching demonstration method based on the 4G/5G communication system, the client and the server are both connected to the network in a 4G/5G wireless mode, and networking is not performed. The IP address change information is updated by adopting a WeChat (short message) or other instant communication systems, and each client and each server only need to record the telephone number. The method solves the problem that the interconnection is difficult due to the dynamic change of the IP addresses of the terminal and the server, has low deployment cost, can realize the teaching effect within the network coverage range of an operator, and has wider application range.

The above description is of the preferred embodiment of the present invention and the technical principles applied thereto, and it will be apparent to those skilled in the art that any changes and modifications based on the equivalent changes and simple substitutions of the technical solution of the present invention are within the protection scope of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A4G/5G communication system-based automatic discovery network informatization teaching demonstration method is applied to an informatization teaching demonstration system, the system comprises a plurality of servers, each server corresponds to a plurality of subordinate clients, and the servers and the clients communicate through a 4G/5G network;

characterized in that the method comprises:

2. The automatic discovery web informatization teaching demonstration method according to claim 1, wherein a third party instant messaging software is used among the plurality of servers for authentication and establishing a server group list;

if the authentication result is negative, the server searches for a server capable of accommodating the client by inquiring the server group list and takes the server as a substitute server;

3. The method for automatically discovering network informatization teaching demonstration according to claim 2 wherein before the step of said server identifying whether the client can be accepted according to the phone number in the received message, the method further comprises:

4. The method for automated discovery network informatization teaching demonstration according to claim 1, wherein after the step of the client sending a connection request to the server according to the received IP address, the method further comprises:

the server judges whether the client is a legal client after receiving the authentication command;

and if so, the client establishes communication connection with the server.

5. The method for demonstrating the information-based education of auto discovery network based on 4G/5G communication system as claimed in claim 1, wherein after the step of said server sending its own phone number, terminal type and IP address to the client, said method further comprises:

and the client verifies whether the received telephone number of the server is the same as the initially recorded telephone number or not, and updates the recorded telephone number of the server when the received telephone number of the server is different from the initially recorded telephone number of the server.

6. The method for demonstrating autodiscovery web-based informatization teaching according to claim 2, wherein said method further comprises:

7. The method for demonstrating autodiscovery web-based informatization teaching according to claim 6, wherein said method further comprises:

when the IP address of the server changes, the server updates the server group list and simultaneously sends the information of the telephone number, the terminal type and the IP address of the server to the other servers;

8. The method of claim 7, wherein the method further comprises:

the server sends an IP address replacement message to a subordinate client;

9. The automatic discovery network informatization teaching demonstration method according to claim 1, wherein the subordinate clients include a first client and a second client, both of the first client and the second client have a short message intercommunication function, the first client supports instant messaging software, and the second client does not support instant messaging software.

10. The method as claimed in claim 1, wherein the servers interact system table information with each other using UDP protocol and provide load balancing with each other.