CN116055534A - Multi-serial device data forwarding system and method - Google Patents
Multi-serial device data forwarding system and method Download PDFInfo
- Publication number
- CN116055534A CN116055534A CN202211517836.XA CN202211517836A CN116055534A CN 116055534 A CN116055534 A CN 116055534A CN 202211517836 A CN202211517836 A CN 202211517836A CN 116055534 A CN116055534 A CN 116055534A
- Authority
- CN
- China
- Prior art keywords
- data
- serial
- serial port
- forwarding
- server
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- H04L67/125—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks involving control of end-device applications over a network
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/38—Information transfer, e.g. on bus
- G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
- G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L12/40006—Architecture of a communication node
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F2213/0002—Serial port, e.g. RS232C
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer And Data Communications (AREA)
Abstract
The invention provides a data forwarding system and method of multi-serial device, relating to the field of industrial automation communication, wherein the system comprises a plurality of control devices, a serial server, a plurality of controlled devices and an upper computer; the plurality of control devices are in communication connection with the serial server and are used for sending data to the serial server; the controlled devices are in communication connection with the serial server and are used for receiving data forwarded by the serial server; the upper computer is in communication connection with the serial server and is used for receiving data forwarded by the serial server; the serial port server is respectively in communication connection with a plurality of control devices, a plurality of controlled devices and an upper computer and is used for receiving and transmitting data; the serial port server comprises a serial port data forwarding unit and a network port; the serial port data forwarding unit is in communication connection with the network port and is used for carrying out signaling analysis and forwarding on data; the network port is in communication connection with the serial port data forwarding unit and the upper computer and is used for forwarding data to the upper computer.
Description
Technical Field
The invention relates to the field of industrial automation communication, in particular to a data forwarding system and method for multi-serial device.
Background
At present, a plurality of industrial automation applications for realizing industrial automation data acquisition and control by utilizing industrial buses such as RS485/422/232, CAN and the like still exist in the industrial field; based on the requirements of industrial 4.0 data acquisition and control, the industrial site completes the butt joint of an industrial bus and an Ethernet through a serial server/CAN server; the serial port equipment of the industrial site generally transmits communication data to a serial port server through a serial port, and the serial port server converts the received communication data into an IP data packet and transmits the IP data packet to a remote server; the remote server restores the received IP data packet into serial port data and transmits the serial port data to other network elements, so that the serial port line is lengthened, and further transmission can be realized.
In practical requirements, one hopes that data from different serial ports can be forwarded to a plurality of different other serial ports, and the current serial port data forwarding method either forwards the data through virtual serial port software located on a third party device or sets a forwarding service module on a serial port server, and both methods have a common disadvantage that once forwarding is set, all data from a certain serial port are forwarded to another serial port and cannot be simultaneously distributed to other serial ports.
The Chinese patent CN102546840A discloses a method, a device and a system for binding a virtual serial port and a physical serial port, which are used for reducing the management complexity of the virtual serial port.
Disclosure of Invention
In view of this, the present invention provides a system and a method for forwarding data of multiple serial devices, which are used for forwarding data of one serial port to multiple different other serial ports at the same time.
The technical scheme of the invention is realized as follows: in one aspect, the invention provides a data forwarding system of multi-serial device, which comprises a plurality of control devices, a serial server, a plurality of controlled devices and an upper computer;
the plurality of control devices are in communication connection with the serial server and are used for sending data to the serial server;
the controlled devices are in communication connection with the serial server and are used for receiving data forwarded by the serial server;
the upper computer is in communication connection with the serial server and is used for receiving data forwarded by the serial server;
the serial port server is respectively in communication connection with a plurality of control devices, a plurality of controlled devices and an upper computer and is used for receiving and transmitting data;
the serial port server comprises a serial port data forwarding unit and a network port;
the serial port data forwarding unit is in communication connection with the network port and is used for carrying out signaling analysis and forwarding on data;
the network port is in communication connection with the serial port data forwarding unit and the upper computer and is used for forwarding data to the upper computer.
Preferably, the plurality of control devices include special devices and common devices, and data of the special devices need to be parsed and forwarded by signaling; the data of the common equipment is directly transmitted without signaling analysis.
Preferably, the special device generates a special message to a serial port, and the serial port comprises RS485, RS422 and RS232.
Preferably, the content of the special message includes whether to forward to other serial ports, whether to forward to a network, whether to forward to serial ports 1 and …, whether to forward to serial port n-1, whether to forward to serial port n and actual user data, where n is the serial port number of the serial port server.
On the other hand, the invention also provides a data forwarding method of the multi-serial device, which comprises the following steps:
s1, judging whether control equipment corresponding to a serial port needs to forward data, if so, configuring whether the serial port data need to be forwarded to other serial ports on a serial port server, wherein the state is available; otherwise, configuring the state of the device as disable;
s2, when the serial port corresponding control equipment does not need to forward data, the data are directly transmitted in a transparent way; when the serial port corresponds to the control equipment and needs to forward data, the control equipment is controlled to form a special message;
s3, according to the content of the special message, the serial port data forwarding unit analyzes the signaling of the special message, and forwards the serial port data of the control equipment according to the analysis result.
Preferably, step S1 specifically includes:
when the serial port server is configured that whether the serial port data needs to be forwarded to other serial ports is in an able state, the serial port data must at least contain a 4bit header, including information whether the serial port data is forwarded to other serial ports and whether the serial port data is forwarded to a network.
Preferably, step S2 specifically includes:
when the serial port corresponding control equipment does not need to forward data, the serial port data does not need a data packet head, and is directly transmitted in a transparent way, so that actual user data is sent.
Preferably, step S2 further includes:
the special message comprises a plurality of bytes, each bit in the bytes respectively defines whether to forward to other serial ports, whether to forward to a network, the length of a subsequent forwarding flag bit, whether to forward to serial ports 1 and …, whether to forward to serial port n-1, whether to forward to serial port n and actual user data,
preferably, step S3 specifically includes:
the serial port data forwarding unit performs signaling analysis on serial port data, wherein a first bit of 0 in a first byte indicates that the serial port data is not forwarded to other serial ports, a first bit of 1 indicates that the serial port data is forwarded to other serial ports, and sequentially judges whether the serial port data is forwarded to other serial ports, a network, a subsequent forwarding flag bit length, serial ports 1 and …, serial port n-1 and serial port n, and finally actual user data is carried.
Preferably, step S3 further includes:
when the bit of whether to forward to other serial ports is 0, the length of the subsequent forwarding flag bit and whether to forward to the serial port n do not exist; when the bit of whether to forward to other serial ports is 1, the length of the subsequent forwarding flag bit and whether to forward to the serial port n are necessary, the length of the subsequent forwarding flag bit informs the maximum serial port number related in the special message, and if the bit of whether to forward to the serial port n is 1, the forwarding is needed correspondingly, otherwise, the forwarding is not needed.
Compared with the prior art, the data forwarding system and method for the multi-serial device have the following beneficial effects:
(1) The special message is formed through the control equipment, and the signaling analysis is carried out on the special message through the serial port data forwarding unit on the serial port server, so that serial port data from the same control equipment can be distributed to different serial ports, and specific requirements are met;
(2) By distinguishing the control equipment needing to forward data and the control equipment not needing to forward data, the serial port data sent by the control equipment can be forwarded to a plurality of different serial ports according to specific requirements of specific equipment in specific scenes under the condition of keeping general basic functions, namely normal transmission of serial port data;
(3) And combining information such as whether to forward to other serial ports, whether to forward to a network, whether to forward to a subsequent forwarding flag bit length, whether to forward to a serial port n and the like with actual user data to form a special message, and adding an identification code to the original serial port data without damaging the serial port data and distinguishing the serial port data from other data so as to facilitate the serial port data to be forwarded to a designated serial port.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a data forwarding system of a multi-serial device according to the present invention;
fig. 2 is a flow chart of a data forwarding method of a multi-serial device according to the present invention;
fig. 3 is a signaling format diagram of a data forwarding method of a multi-serial device according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will clearly and fully describe the technical aspects of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, are intended to fall within the scope of the present invention.
Example 1
The data forwarding system of the multi-serial device is provided, as shown in fig. 1, and comprises a plurality of control devices, a serial server, a plurality of controlled devices and an upper computer;
the plurality of control devices are in communication connection with the serial server and are used for sending data to the serial server;
the controlled devices are in communication connection with the serial server and are used for receiving data forwarded by the serial server;
the upper computer is in communication connection with the serial server and is used for receiving data forwarded by the serial server;
the serial port server is respectively in communication connection with the plurality of control devices, the plurality of controlled devices and the upper computer and is used for receiving and transmitting data;
the serial port server comprises a serial port data forwarding unit and a network port;
the serial port data forwarding unit is in communication connection with the network port and is used for carrying out signaling analysis and forwarding on the data;
the network port is in communication connection with the serial port data forwarding unit and the upper computer and is used for forwarding data to the upper computer.
A serial port data forwarding unit is needed in the serial port server; and the method is responsible for carrying out signaling analysis on the data from the specific port according to the configuration and carrying out data forwarding according to the signaling.
The plurality of control devices comprise special devices and common devices, and the data of the special devices need signaling analysis and forwarding; the data of the common equipment is directly transmitted without signaling analysis.
Special equipment such as a control display screen and the like generates and transmits special messages to a serial port according to the needs, wherein the serial port can be RS485, RS422 or RS232;
except that the serial port data of the special equipment needs to be subjected to signaling analysis, the data of other serial ports do not need to be analyzed, and are directly transmitted in a transparent way.
The special equipment generates a special message to a serial port, and the serial port comprises RS485, RS422 and RS232.
The content of the special message comprises whether to forward to other serial ports, whether to forward to a network, whether to forward to serial ports 1 and …, whether to forward to serial port n-1, whether to forward to serial port n and actual user data, wherein n is the serial port number of the serial port server.
Which serial data needs to be resolved, and whether the serial data needs to be forwarded to other serial ports is set on the web page.
Example two
The data forwarding method of the multi-serial device, as shown in fig. 2, comprises the following steps:
s1, judging whether control equipment corresponding to a serial port needs to forward data, if so, configuring whether the serial port data need to be forwarded to other serial ports on a serial port server, wherein the state is available; otherwise, configuring the state of the device as disable;
s2, when the serial port corresponding control equipment does not need to forward data, the data are directly transmitted in a transparent way; when the serial port corresponds to the control equipment and needs to forward data, the control equipment is controlled to form a special message;
s3, according to the content of the special message, the serial port data forwarding unit analyzes the signaling of the special message, and forwards the serial port data of the control equipment according to the analysis result.
The user sets "data from serial port 1 need to be forwarded to other serial ports" on the serial port server configuration interface, and the serial port data forwarding unit saves the configuration.
When the user presses the key on the control display screen 01, the control screen background program can decide whether the command is forwarded to other serial ports according to the configuration to form a special message. The serial ports can be RS485, RS422, RS232, and the like.
The step S1 specifically comprises the following steps:
when the serial port server is configured that whether the serial port data needs to be forwarded to other serial ports is in an able state, the serial port data must at least contain a 4bit header, including information whether the serial port data is forwarded to other serial ports and whether the serial port data is forwarded to a network.
The step S2 specifically comprises the following steps:
when the serial port corresponding control equipment does not need to forward data, the serial port data does not need a data packet head, and is directly transmitted in a transparent way, so that actual user data is sent.
The special message comprises a plurality of bytes, each bit in the bytes respectively defines whether to forward to other serial ports, whether to forward to a network, the length of a subsequent forwarding flag bit, whether to forward to serial ports 1 and …, whether to forward to serial port n-1, whether to forward to serial port n and actual user data,
the step S3 specifically comprises the following steps:
the serial port data forwarding unit performs signaling analysis on serial port data, wherein a first bit of 0 in a first byte indicates that the serial port data is not forwarded to other serial ports, a first bit of 1 indicates that the serial port data is forwarded to other serial ports, and sequentially judges whether the serial port data is forwarded to other serial ports, a network, a subsequent forwarding flag bit length, serial ports 1 and …, serial port n-1 and serial port n, and finally actual user data is carried.
If the data needs to be forwarded to other serial ports, setting 1 as whether the data is forwarded to other serial ports or not in the signaling, otherwise setting 0;
if the data needs to be forwarded to the equipment on the network, setting 1 as whether the data is forwarded to the network or not in the signaling, otherwise setting 0;
when the bit of whether to forward to other serial ports is 0, the length of the subsequent forwarding flag bit and whether to forward to the serial port n do not exist; when the bit of whether to forward to other serial ports is 1, the length of the subsequent forwarding flag bit and whether to forward to the serial port n are necessary, the length of the subsequent forwarding flag bit informs the maximum serial port number related in the special message, and if the bit of whether to forward to the serial port n is 1, the forwarding is needed correspondingly, otherwise, the forwarding is not needed.
When a certain device does not need to forward data, a configuration page on the serial server is configured as disable, wherein the configuration page is configured as to whether the data of the serial port need to be forwarded to other serial ports. At this time, the data packet header is not needed, and the serial port sends out the actual user data.
With reference to fig. 1 and 2, the program "control display 01" sends serial data to serial 1 of the serial server;
the serial port data forwarding unit of the serial port server judges whether a user sets whether the serial port data needs to be forwarded to other serial ports or not as enabling (disable by default);
if the data is enabled, the data is parsed according to a signaling format (shown in figure 3);
analyzing whether the message needs to be forwarded to a network; whether the data is forwarded to a network is controlled according to the zone bit; if necessary, forwarding to the corresponding one or more network devices according to the configured rules.
Analyzing whether the serial port needs to be transferred or not; if so, analyzing bit of the serial port in the signaling, and sending the bit to the corresponding serial port according to bit indication. If not, the data will not send other serial ports.
The signaling format is shown in fig. 3, taking an 8-serial server as an example:
when a certain device does not need to forward data, a configuration page on the serial server is configured as disable, wherein the configuration page is configured as to whether the data of the serial port need to be forwarded to other serial ports. At this time, the data packet header is not needed, and the serial port sends out the actual user data;
when the configuration page on the serial port server is configured as to whether the data of the serial port need to be forwarded to other serial ports or not, the serial port data which must be sent by the equipment corresponding to the serial port must at least contain a 4bit header, including information of whether the data is forwarded to other serial ports or not and whether the data is forwarded to a network or not.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The system comprises a plurality of control devices, a serial server, a plurality of controlled devices and an upper computer;
the plurality of control devices are in communication connection with the serial server and are used for sending data to the serial server;
the controlled devices are in communication connection with the serial server and are used for receiving data forwarded by the serial server;
the upper computer is in communication connection with the serial server and is used for receiving data forwarded by the serial server;
the serial port server is respectively in communication connection with a plurality of control devices, a plurality of controlled devices and an upper computer and is used for receiving and transmitting data;
the serial port server comprises a serial port data forwarding unit and a network port;
the serial port data forwarding unit is in communication connection with the network port and is used for carrying out signaling analysis and forwarding on data;
the network port is in communication connection with the serial port data forwarding unit and the upper computer and is used for forwarding data to the upper computer.
2. The multi-serial device data forwarding system of claim 1 wherein the plurality of control devices includes special devices and normal devices, the data of the special devices requiring signaling parsing and forwarding; the data of the common equipment is directly transmitted without signaling analysis.
3. The multi-serial device data forwarding system of claim 2 wherein the special device generates special messages to serial ports comprising RS485, RS422 and RS232.
4. A multi-serial device data forwarding system according to claim 3 wherein the content of the special message includes whether to forward to other serial ports, whether to forward to the network, whether to forward to serial port 1, …, whether to forward to serial port n-1, whether to forward to serial port n and actual user data, n being the serial port number of the serial port server.
5. The data forwarding method of the multi-serial device is characterized by comprising the following steps of:
s1, judging whether control equipment corresponding to a serial port needs to forward data, if so, configuring whether the serial port data need to be forwarded to other serial ports on a serial port server, wherein the state is available; otherwise, configuring the state of the device as disable;
s2, when the serial port corresponding control equipment does not need to forward data, the data are directly transmitted in a transparent way; when the serial port corresponds to the control equipment and needs to forward data, the control equipment is controlled to form a special message;
s3, according to the content of the special message, the serial port data forwarding unit analyzes the signaling of the special message, and forwards the serial port data of the control equipment according to the analysis result.
6. The method for forwarding data of multiple serial devices as claimed in claim 5, wherein the step S1 specifically includes:
when the serial port server is configured that whether the serial port data needs to be forwarded to other serial ports is in an able state, the serial port data must at least contain a 4bit header, including information whether the serial port data is forwarded to other serial ports and whether the serial port data is forwarded to a network.
7. The method for forwarding data of multiple serial devices as claimed in claim 6, wherein the step S2 specifically includes:
when the serial port corresponding control equipment does not need to forward data, the serial port data does not need a data packet head, and is directly transmitted in a transparent way, so that actual user data is sent.
8. The method for forwarding data of multiple serial devices as claimed in claim 7, wherein said step S2 further comprises:
the special message includes a plurality of bytes, and each bit in the bytes defines whether to forward to other serial ports, whether to forward to a network, the length of a subsequent forwarding flag bit, whether to forward to serial ports 1 and …, whether to forward to serial port n-1, whether to forward to serial port n and actual user data respectively.
9. The method for forwarding data of multiple serial devices as claimed in claim 8, wherein the step S3 specifically includes:
the serial port data forwarding unit performs signaling analysis on serial port data, wherein a first bit of 0 in a first byte indicates that the serial port data is not forwarded to other serial ports, a first bit of 1 indicates that the serial port data is forwarded to other serial ports, and sequentially judges whether the serial port data is forwarded to other serial ports, a network, a subsequent forwarding flag bit length, serial ports 1 and …, serial port n-1 and serial port n, and finally actual user data is carried.
10. The method for forwarding data of multiple serial devices according to claim 9, wherein the step S3 further comprises:
when the bit of whether to forward to other serial ports is 0, the length of the subsequent forwarding flag bit and whether to forward to the serial port n do not exist; when the bit of whether to forward to other serial ports is 1, the length of the subsequent forwarding flag bit and whether to forward to the serial port n are necessary, the length of the subsequent forwarding flag bit informs the maximum serial port number related in the special message, and if the bit of whether to forward to the serial port n is 1, the forwarding is needed correspondingly, otherwise, the forwarding is not needed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211517836.XA CN116055534A (en) | 2022-11-29 | 2022-11-29 | Multi-serial device data forwarding system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211517836.XA CN116055534A (en) | 2022-11-29 | 2022-11-29 | Multi-serial device data forwarding system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116055534A true CN116055534A (en) | 2023-05-02 |
Family
ID=86114949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211517836.XA Pending CN116055534A (en) | 2022-11-29 | 2022-11-29 | Multi-serial device data forwarding system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116055534A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117544609A (en) * | 2024-01-09 | 2024-02-09 | 广州美凯信息技术股份有限公司 | Data transmission method of serial port transmission system based on KVM control |
-
2022
- 2022-11-29 CN CN202211517836.XA patent/CN116055534A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117544609A (en) * | 2024-01-09 | 2024-02-09 | 广州美凯信息技术股份有限公司 | Data transmission method of serial port transmission system based on KVM control |
| CN117544609B (en) * | 2024-01-09 | 2024-04-02 | 广州美凯信息技术股份有限公司 | Data transmission method of serial port transmission system based on KVM control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4688035A (en) | End user data stream syntax | |
| CN1842103A (en) | Apparatus enabling usage of external display monitor with a mobile telephone | |
| SE0103535D0 (en) | A system of intelligent devices, a method for providing such a system and a computer data signal | |
| JPH0472428B2 (en) | ||
| CN116055534A (en) | Multi-serial device data forwarding system and method | |
| JPH10233820A (en) | Data transmission method | |
| CN1076910C (en) | Multi-master supervisory system | |
| US4354261A (en) | Circuit arrangement and method for multi-address switching operations | |
| CN102023952A (en) | Communication system and communication control method thereof | |
| CN109283901A (en) | Integrated smart home system | |
| CN213213872U (en) | Gateway based on Bluetooth communication and 5G network communication | |
| JP3483342B2 (en) | Data transmission system and signal selection connection device | |
| CN1771683B (en) | System and method for preventing phantom data communication links | |
| KR20000021023A (en) | Net situation drawing method in communication net management system | |
| KR100271964B1 (en) | The method of the operator entry service using telocator alphanumeric protocol | |
| JP2715137B2 (en) | Communication network control method | |
| JPS60169252A (en) | Network management method | |
| Carpenter et al. | Serving users with a local area network | |
| JPH04255136A (en) | Packet exchange | |
| CN101175079A (en) | Memo output system and method using terminal communication | |
| KR19990061505A (en) | How to handle transaction language 1 parsing in Network Management Regional Center | |
| KR920004770B1 (en) | Protocol converting system for computer | |
| CN116266834A (en) | Multi-mode group communication system based on WEB | |
| JP5121789B2 (en) | Data transmission system and computer | |
| JPS60245345A (en) | Processing system of packet communication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |