CN104767590A - Reliable data transmission and control method for serial communication - Google Patents
Reliable data transmission and control method for serial communication Download PDFInfo
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- CN104767590A CN104767590A CN201510160552.3A CN201510160552A CN104767590A CN 104767590 A CN104767590 A CN 104767590A CN 201510160552 A CN201510160552 A CN 201510160552A CN 104767590 A CN104767590 A CN 104767590A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
- H04L1/001—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding applied to control information
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Abstract
The invention relates to a reliable data transmission and control method for serial communication on the basis of internet-of-things terminal interconnection or data communication. When the data transmission and control method is used for communication between systems on a serial communication system, communication content is packaged and processed, so that communication reliability is guaranteed from the perspective of algorithms on the basis that a transmitting end and a receiving end conduct proper control. A complete control method and scheme which are oriented to serial communication and put forward for meeting the data reliability requirement are provided for a client. According to the method, a reliable communication model on a low-speed network can be achieved quickly and generally, and good solutions and practices are provided for serial devices supporting internet-of-things medium and low speeds and reliable data transmission under inter-node serial data transmission scenes.
Description
Technical field
When the present invention relates to or transfer of data interconnected based on thing connection terminal, a kind of reliable data transmission of serial communication and control method.
Background technology
Based on 2.5G or 3G, 4G or other data transmission schemes based on telecommunication system, under the scenes such as field, remote, harsh weather, under the data communication mode between each node in Internet of Things, be the scheme of common transfer of data.
Most domestic transducer is based on low-frequency serial bus equipment such as 485 or 232, and to the control of these equipment, transfer of data etc. usually require to set up by control end to the complete serial link of node (transducer) layer.This link can be that the circuit of physics connects, and also can be the serial protocol virtual link based on IP carrying, and the Control for Dependability of the transfer of data on this link, improves along with the raising of system reliability requirement.
At present based on Modbus agreement or other serial communications of IP carrying, only control in IP grouping the transmitting-receiving that data are provided with single packet mode, for the transmission of chunk data, we also need a kind of reliable, detachable, support to reentry (breakpoint, power-off) resume data transmission scheme and the control method of pattern.
Summary of the invention
The technical problem to be solved in the present invention overcomes above-mentioned defect, provides a kind of reliable data transmission and control method of serial communication, to promote existing low speed, and more widely using of low cost serial internet of things equipment.
For solving the problem, the technical solution adopted in the present invention is:
A kind of reliable data transmission of serial communication and control method, when the method is based upon and carries out communication between the system in serial communication system, by to the packaging of Content of communciation and process, and to carry out on the basis that suitably controls at transmitting terminal and receiving terminal, from algorithm ensure a kind of data of the reliability of communication transmission and and control; Communication two party carries out communication with reliable communicating agreement, and by the reliable delivery of key-course control data between communication node;
The method comprises the steps:
1) sender and recipient set up transmitting-receiving confirmation system;
2) communication two party Message recover signature and host-host protocol is set up, by CRC redundancy check, packet model, compression algorithm, the one or more than one mode in hash algorithm algorithm realizes the certificate authenticity of data;
3) on the basis of host-host protocol, expansion realizes grouping, and compression protocol is to support large data and to save bandwidth;
4) data confirm before sending;
5) connection status report.
Further, when transmitting terminal sends bag data; These data, with said shank, at " head " of message, contain a series of reliability data marks of the message that will send, comprising:
A), message id, this ID comprises in response packet, as the mark of " receipt ";
B), message header CRC: after receiving terminal receives message, CRC checking is carried out to head;
C), packet marking: when data need repeatedly to send, marked which individual/several information altogether of message;
D), coded format: marked the coded format that message data district adopts;
E), routing iinformation: when message needs to carry out cross-node route, the source address that message is wanted and destination address;
After recipient receives and sends data, by the various checking of the header information that data are corresponding;
Recipient sends reply data, informs that sender receives the authorization information of data;
After transmit leg receives response, do subsequent treatment; Whether whether whether the other side's data receive data that are no, that receive correctly, also has follow-up data to send.
Further, transmitting terminal refers to the data that will send, and data are a stream or a blocks of data or file or other set forms;
Data transmit control device in transmitting terminal provides 3 kinds of patterns to carry out deal with data:
Send by the stream mode data of sending strategy grouping;
The independent binary blocks of data divided into groups may be needed to send by block size;
The data of specified format, this form is by customization.
Further, data transmit control device. process following behavior: control sending strategy: number of retries, error handle; Data block/order is unpacked automatically and organizes bag; To the distribution processor of the data received; Message declaration period treatment.
Further, receiving terminal, carries out packet transaction after receiving data as required, after receiving terminal receives data, informs the data message that transmitting terminal receives.
Further, coded format is compressed format.
Communication two party based on this agreement, serial circuit (agreement) can realize block functions.
Communication two party based on this agreement, serial circuit (agreement) can realize the reliable feature capability of long data block.
Beneficial effect of the present invention:
Owing to have employed technique scheme, compared with prior art, the present invention for client provide towards serial communication time, the complete control method that data reliability requirement is proposed and scheme, by this method, can be quick, realize to generalization the reliable communicating model in slow network, to the serial device of low speed in holder networking, and the reliable data transmission between node under serial data transmission scene, provide good solution and practice.
Accompanying drawing explanation
Fig. 1: be data sending/receiving mode declaration pattern specification in the present invention;
Fig. 2: for data in the present invention send structure (message) explanation;
Fig. 3: in the present invention, chunk data grouping sends and receives explanation;
Fig. 4: for A in the present invention sends to Node B data explanation of shaking hands;
Fig. 5: for A in the present invention sends heartbeat explanation to B.
Embodiment
Describe the present invention below in conjunction with accompanying drawing:
Fig. 1 describes the transmitting-receiving signal of data from transmitting terminal to receiving terminal:
When transmitting terminal sends a bag request msg; These data, with Fig. 2 said shank, at " head " of message, contain a series of reliability data marks of the message that will send, comprising:
A), message id: this ID comprises in response packet, as the mark of " receipt ";
B), message header CRC: after receiving terminal receives message, CRC checking is carried out to head;
C), packet marking: when data need repeatedly to send, marked which individual/several information altogether of message;
D), coded format: marked the coded format that message data district adopts, be generally compressed format;
E), routing iinformation: when message needs to carry out cross-node route, the source address that message is wanted and destination address;
After recipient receives and sends data, by the various checking of the header information that data are corresponding;
Recipient sends reply data, informs that sender receives the authorization information of data;
After transmit leg receives reply data, carry out subsequent treatment decision-making according to reply data:
The other side's data receive no;
The data received are correctly no;
Follow-up data whether is also had to send.
In Fig. 2:
Data: refer to the real data that will send.
Afterbody: the CRC(redundant cyclic in " data " region is verified) fill.
Fig. 3: when describing the grouping transmission of data needs, the tupe of message
transmitting terminal
Being often referred to the data that will send. data may be a stream, or a blocks of data, or file, or other set forms.
Transmitter provides 3 kinds of patterns to carry out deal with data.
1.
stream modedata send (by sending strategy grouping)
2. independent
binary block datasend (grouping may be needed by block size)
3. the data of specified format, this form is by customization.
send
Data transmit control device. process following behavior:
1. control sending strategy (number of retries, error handle etc.);
2. pair data block/order is automatically unpacked and organizes bag;
3. the distribution processor of pair data received;
4. message declaration period treatment.
physical link
Physical data interface, refers to serial ports physical connection passage herein.
Receive
Data, by actual physical link, receive data at receiving terminal.
Response packet
After receiving terminal receives data, inform the data message that transmitting terminal receives.
receiving terminal
Receiving terminal, carries out packet transaction after receiving data as required.
Fig. 4 illustrates before A sends message to B, message processing procedure when needing confirmation recipient whether online.
A sends a handshake packet, attempts sending to B;
If B is subject to this handshake packet, identify sender information, connect if allow, then send a response of shaking hands to A;
A receives response of shaking hands, and mark and the other side connect, and can carry out data processing;
A at the appointed time in do not receive B response, mark cannot set up communication with B, subsequent communications stop;
Fig. 5 describes A timing and sends heartbeat to B, and for informing A existing state information, when multiple A point is reported to B simultaneously, we can realize a topological diagram function based on serial network.
Claims (6)
1. the reliable data transmission of serial communication and a control method, is characterized in that:
When the method is based upon and carries out communication between the system in serial communication system, by to the packaging of Content of communciation and process, and to carry out on the basis that suitably controls at transmitting terminal and receiving terminal, from algorithm ensure a kind of data of the reliability of communication transmission and and control; Communication two party carries out communication with reliable communicating agreement, and by the reliable delivery of key-course control data between communication node;
The method comprises the steps:
1) sender and recipient set up transmitting-receiving confirmation system;
2) communication two party Message recover signature and host-host protocol is set up, by CRC redundancy check, packet model, compression algorithm, the one or more than one mode in hash algorithm algorithm realizes the certificate authenticity of data;
3) on the basis of host-host protocol, expansion realizes grouping, and compression protocol is to support large data and to save bandwidth;
4) data confirm before sending;
5) connection status report.
2. the reliable data transmission of serial communication according to claim 1 and control method, is characterized in that:
When transmitting terminal sends bag data; These data, with said shank, at " head " of message, contain a series of reliability data marks of the message that will send, comprising:
A), message id, this ID comprises in response packet, as the mark of " receipt ";
B), message header CRC: after receiving terminal receives message, CRC checking is carried out to head;
C), packet marking: when data need repeatedly to send, marked which individual/several information altogether of message;
D), coded format: marked the coded format that message data district adopts;
E), routing iinformation: when message needs to carry out cross-node route, the source address that message is wanted and destination address;
After recipient receives and sends data, by the various checking of the header information that data are corresponding;
Recipient sends reply data, informs that sender receives the authorization information of data;
After transmit leg receives response, do subsequent treatment; Whether whether whether the other side's data receive data that are no, that receive correctly, also has follow-up data to send.
3. the reliable data transmission of serial communication according to claim 1 and control method, is characterized in that:
Transmitting terminal refers to the data that will send, and data are a stream or a blocks of data or file or other set forms;
Data transmit control device in transmitting terminal provides 3 kinds of patterns to carry out deal with data:
Send by the stream mode data of sending strategy grouping;
The independent binary blocks of data divided into groups may be needed to send by block size;
The data of specified format, this form is by customization.
4. the reliable data transmission of serial communication according to claim 3 and control method, is characterized in that:
Data transmit control device. process following behavior:
Control sending strategy: number of retries, error handle;
Data block/order is unpacked automatically and organizes bag;
To the distribution processor of the data received;
Message declaration period treatment.
5. the reliable data transmission of serial communication according to claim 1 and control method, is characterized in that: receiving terminal, carry out packet transaction as required after receiving data, after receiving terminal receives data, inform the data message that transmitting terminal receives.
6. the reliable data transmission of serial communication according to claim 1 and control method, is characterized in that: coded format is compressed format.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510160552.3A CN104767590A (en) | 2015-04-08 | 2015-04-08 | Reliable data transmission and control method for serial communication |
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| CN201510160552.3A CN104767590A (en) | 2015-04-08 | 2015-04-08 | Reliable data transmission and control method for serial communication |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106603199A (en) * | 2016-12-04 | 2017-04-26 | 深圳大学 | Hash code based multiple access method and device of wireless network |
| CN109219936A (en) * | 2016-06-02 | 2019-01-15 | 诺基亚通信公司 | Device and method for the reliable communication in multi-connection |
| CN111061670A (en) * | 2019-11-20 | 2020-04-24 | 福建北峰通信科技股份有限公司 | Method for optimizing terminal program space through virtual serial port protocol conversion |
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2015
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| CN1819506A (en) * | 2006-03-16 | 2006-08-16 | 江苏沙钢集团有限公司 | Series interface wireless communication data processing method |
| CN102318283A (en) * | 2008-05-01 | 2012-01-11 | 格诺多有限公司 | A method of data delivery across a network fabric in a router or Ethernet bridge |
| US20090323722A1 (en) * | 2008-06-25 | 2009-12-31 | Debendra Das Sharma | Link and lane level packetization scheme of encoding in serial links |
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| CN109219936A (en) * | 2016-06-02 | 2019-01-15 | 诺基亚通信公司 | Device and method for the reliable communication in multi-connection |
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| CN111061670A (en) * | 2019-11-20 | 2020-04-24 | 福建北峰通信科技股份有限公司 | Method for optimizing terminal program space through virtual serial port protocol conversion |
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Application publication date: 20150708 |