CN103475651A - Data-unit-based data transmission method - Google Patents
Data-unit-based data transmission method Download PDFInfo
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- CN103475651A CN103475651A CN201310394226XA CN201310394226A CN103475651A CN 103475651 A CN103475651 A CN 103475651A CN 201310394226X A CN201310394226X A CN 201310394226XA CN 201310394226 A CN201310394226 A CN 201310394226A CN 103475651 A CN103475651 A CN 103475651A
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Abstract
The invention discloses a data-unit-based data transmission method. The data-unit-based data transmission method comprises the steps: defining a data unit; defining identical data flow structure bodies at a sending end and a receiving end; burstifying data flow; sending and receiving the data flow; analyzing the data flow. The data unit-based data transmission method has the beneficial effects that 1) an outer-space communication protocol achieves an agreement at the sending end and the receiving end, a data protocol is a fixed rule without the need of transmission and any expand; 2) the data structure bodies are defined simply, internal codes of each data unit and data of the data unit are paired to form independent data bodies, and when the structure bodies contain a plurality of data bodies, the ranking is not limited by a sequence; 3) the data bodies of the data structure bodies can be flexibly stretched and expanded as required.
Description
Technical field
The present invention relates to data communication field, relate in particular to the data transmission method of a kind of based on data unit.
Background technology
Data communication is according to certain communication protocol, utilizes a kind of communication mode and the communication service of data transmission technology transfer data information between two terminals.It can realize the data information transfer between computer and computer, computer and terminal and terminal and terminal.
In prior art, data communication protocol is to communicate accurately and effectively the mandatory rule of institute and agreement, but takes communication protocol that following shortcoming is arranged:
1) packing agreement and analysis protocol must be strict corresponding, otherwise cause parse error
2) autgmentability is poor: as agreement increases or the minimizing project, the agreement of packing and analysis protocol must upgrade simultaneously
3) the resolution logic reusability is poor.
If a kind of method of transfer of data easily can be provided, will be very significant.
Summary of the invention
For addressing the above problem, the present invention proposes the data transmission method of a kind of based on data unit, comprising:
Definition data cell step;
In transmitting terminal and receiving terminal definition same data stream structure step;
Set of streams bag step;
Data flow sending and receiving step;
The parsing of the data stream step;
Wherein, defined data cell comprises data, data name, the data ISN of representative data title, data length, data analysis method;
The data flow architecture body has defined outer communication protocol and internal layer data volume, described outer communication protocol definition data flow start sign and data length, end sign and data length thereof, described internal layer data volume, between starting sign and finishing to identify, occurs in pairs according to data ISN and data;
The step of described set of streams bag is assembled into packet by the data to be transmitted unit according to the data structure body;
The parsing of described data flow is resolved data stream according to the data flow architecture body of definition.
Beneficial effect of the present invention is:
1) outer communication protocol is reached common understanding and is got final product transmitting terminal and receiving terminal both sides, and data protocol is a kind of unalterable rules, does not need transmission, has shortened the length of data flow, but and arbitrary extension.
2) data structure body definition is simple, and each data cell ISN and data unit data are become a partner and formed independently data volume, and the data ISN when data volume in and data sort and also are not subject to sequence limit when a plurality of to having.
3) the data structure body can flexible expansion, increases data, and also can be according to demand, flexibly flexible and extended packet.
4) can, according to packet, automatically resolve and computing.
5) take data cell as resolution unit, facilitate updating maintenance expansion resolution logic.
Embodiment
Below technical solution of the present invention is elaborated.
Basic thought of the present invention makes take the individual data unit as the logic main body, and the step mainly comprised comprises:
Definition data cell step;
In transmitting terminal and receiving terminal definition same data stream structure step;
Set of streams bag step;
Data flow sending and receiving step;
The step of parsing of the data stream.
Below each step is explained respectively.
1. define the data cell step
Data cell is the system minimum data body that the present invention defines, the comprehensive information that comprises data to be transmitted, specifically have, data name, data type (as shaping, character type etc.), data length, correction factor and/or revise side-play amount, data analysis method, distinguish the data ISN of different pieces of information information for system.
As an air detection system, the transfer of data that need to gather sensing equipment is to host computer, the data message of transmission has device numbering, device type, air themperature, air humidity, can be by device numbering, device type, air themperature, air humidity is defined as respectively data cell, as shown in the table:
Wherein, parseInt is analytical function, at this, only for for example, in practice, can define as required different analytical functions or other analytic methods.
2. in transmitting terminal and receiving terminal definition same data stream structure step
The purpose of this step is to set up a common data flow architecture body at transmitting terminal and receiving terminal, the unified identification for whole system to transmitting data stream.
The data flow architecture body has defined outer communication protocol and internal layer data volume, described outer communication protocol definition data flow start sign and data length, end sign and data length thereof, described internal layer data volume, between starting sign and finishing to identify, occurs in pairs according to data ISN and data.The data structure body also is defined the length of data ISN and data.
The present embodiment structure has following features:
1) data flow is by 16 system character string splicings.
2) data flow starts to start identifying 7E, to finish sign 21, finishes.
3) data volume partly comprises at least one data and data ISN pair.Should be appreciated that described data ISN is the data ISN of this data institute's corresponding data unit.As, transmit the air themperature data cell, data volume is: 01092E(01 is air themperature data cell ISN, and 092E is the air themperature data, and 16 systems of employing mean); For another example, transmission air themperature data cell and device numbering data cell, data volume is 01092E6508. (01 is air themperature data cell ISN, and 092E is the air themperature data, and 65 is device numbering data cell ISN, and 08 is the device numbering data)
Be below the example of above-mentioned air detection system institute definition data structure body:
3. set of streams bag step
This step is assembled into packet by all data to be transmitted unit according to the data structure body.
Take above-mentioned air detection system as example: certain sensing equipment gets temperature data 092E(16 system), need the information of this sensing equipment of transmission and the temperature data obtained thereof, according to the definition of data flow architecture body, can assemble the temperature data bag as follows:
The final data bag is: 7E6508660101092E21.
4. data flow sending and receiving step
Data stream transmitting: the data packet transmission of step 3 assembling is arrived to receiving terminal.
As, by network or serial ports or other transmission means transmitting data streams 7E6508660101092E21 to receiving terminal.
Data flow receives: receiving terminal receives data flow.
This step utilization be prior art.
5. parsing of the data stream step
This step comprises following sub-step:
Steps A: receiving terminal checking data stream starts sign and finishes sign, carries out the following step as legal;
Be specially: with the 7E beginning, with the packet of 21 endings, be only legal data.
Step B: the data flow received is changed to byte arrays byte[], byte[0 wherein] for starting sign, index index is 0;
Step C: index index+ starts identification data length, obtains first data ISN.
Step D: the upper step of index index+ is obtained the length of data ISN, according to the data ISN, obtains the data length that this ISN is corresponding, reads the designated length data.
Step e: the data ISN that step D is obtained and data are preserved.
Be specially: the interim memory carrier Dictionary<int of receiving terminal definition data, object tempData, int record data unit ISN wherein, object record data cell data
Step F: index index+ step D obtains the length of data, obtains next data ISN, if next data finishes for finishing sign, otherwise repeating step D, E.
Step G: according to the data ISN, call the analytic method resolution data of corresponding data unit.
Take air detection system recited above as example, and the 7E6508660101092E21 parsing of the data stream step of its transmission is:
The receiving terminal verification thinks legal after starting to identify 7E and finishing sign 21, defines the interim memory carrier Dictionary<int of data, object > tempData, and the data flow 7E6508660101092E21 received is converted to byte arrays byte[].Byte[0 wherein] for starting to identify 7E, index index is 0.
Index index+1, obtain next data cell ISN, and 65, according to the description of data cell 65, its length is 1, index+1 obtains the data 08 of data ISN 65 place data cells, is saved in tempData (65,08).And then, obtain next byte data, index index+1, obtain data ISN 66 ... circulation successively, finish sign 21 until read, and stops reading.
Finally, receiving terminal, according to the data cell ISN read, calls the analytic method resolution data of corresponding data resolution unit.
Beneficial effect of the present invention is:
1) outer communication protocol is reached common understanding and is got final product transmitting terminal and receiving terminal both sides, and data protocol is a kind of unalterable rules, does not need transmission, arbitrary extension.Add agreement, shorten the length of data flow.
2) data structure body definition is simple, and each data cell ISN and data unit data are become a partner and formed independently data volume, and the data ISN when data volume in and data sort and also are not subject to sequence limit when a plurality of to having.
3) the data structure body can flexible expansion, increases data, and also can be according to demand, flexibly flexible and extended packet.
4) can, according to packet, automatically resolve and computing.
5) take data cell as resolution unit, facilitate updating maintenance expansion resolution logic.
Claims (8)
1. the data transmission method of a based on data unit, is characterized in that, comprising:
Definition data cell step;
In transmitting terminal and receiving terminal definition same data stream structure step;
Set of streams bag step;
Data flow sending and receiving step;
The parsing of the data stream step;
Wherein, defined data cell comprises data, data name, the data ISN of representative data title, data length, data analysis method;
The data flow architecture body has defined outer communication protocol and internal layer data volume, described outer communication protocol definition data flow start sign and data length, end sign and data length thereof, described internal layer data volume, between starting sign and finishing to identify, occurs in pairs according to data ISN and data;
The step of described set of streams bag is assembled into packet by the data to be transmitted unit according to the data structure body;
The parsing of described data flow is resolved data stream according to the data flow architecture body of definition.
2. the data transmission method of a kind of based on data as claimed in claim 1 unit, is characterized in that, described data cell has also comprised data type and/or correction factor, correction side-play amount.
3. the data transmission method of a kind of based on data as claimed in claim 1 or 2 unit, is characterized in that, the analytic method of data cell is to take analytical function.
4. the data transmission method of a kind of based on data as claimed in claim 1 unit, is characterized in that, described data flow is taked 16 system character strings.
5. as the data transmission method of claim 1 or 2 or 4 described a kind of based on data unit, it is characterized in that, described data flow starts to be designated 7E, finishes to be designated 21.
6. as the data transmission method of the described a kind of based on data of any one in claim 1,2,4 unit, it is characterized in that, the step of described parsing of the data stream is specially:
Steps A: receiving terminal checking data stream starts sign and finishes sign, carries out the following step as legal;
Step B: the data flow received is changed to byte arrays byte[], byte[0 wherein] for starting sign, index index is 0;
Step C: index index+ starts identification data length, obtains first data ISN.
Step D: the upper step of index index+ is obtained the length of data ISN, and according to described data ISN, the length of corresponding data, read the designated length data.
Step e: the data ISN that step D is obtained and data are preserved.
Step F: index index+ step D obtains the length of data, obtains next data ISN, if next data finishes for finishing sign, otherwise repeating step D, E.
Step G: according to the data ISN, call the data analysis method resolution data of corresponding data unit.
7. the data transmission method of a kind of based on data as claimed in claim 6 unit, is characterized in that, in the step of described parsing of the data stream, and the interim memory carrier storage data of receiving terminal definition data and corresponding data ISN thereof.
8. the data transmission method of a kind of based on data as claimed in claim 7 unit, is characterized in that, the interim memory carrier of described data adopts Dictionary<int, object > storage.Int record data ISN wherein, the object record data.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104461938A (en) * | 2014-12-11 | 2015-03-25 | 北京国双科技有限公司 | Method and device for reading data |
| CN105446910A (en) * | 2015-11-24 | 2016-03-30 | 东软集团股份有限公司 | Data transmission methods and apparatus |
| CN105549900A (en) * | 2015-12-05 | 2016-05-04 | 中国航空工业集团公司洛阳电光设备研究所 | Data transmission analysis method and apparatus |
| CN106713167A (en) * | 2015-11-16 | 2017-05-24 | 中兴通讯股份有限公司 | Data code stream sending method and device |
| CN109347883A (en) * | 2018-12-05 | 2019-02-15 | 南通星云智能科技有限公司 | A kind of expansible communication protocol data packet and its communication system |
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| US20030206519A1 (en) * | 2002-05-03 | 2003-11-06 | Michael Sanders | System and method for encoding and decoding messages |
| CN1630286A (en) * | 2003-12-16 | 2005-06-22 | 盛万兴 | A high-efficiency electric data transmission coding decoding method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20030206519A1 (en) * | 2002-05-03 | 2003-11-06 | Michael Sanders | System and method for encoding and decoding messages |
| CN1630286A (en) * | 2003-12-16 | 2005-06-22 | 盛万兴 | A high-efficiency electric data transmission coding decoding method |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104461938A (en) * | 2014-12-11 | 2015-03-25 | 北京国双科技有限公司 | Method and device for reading data |
| CN106713167A (en) * | 2015-11-16 | 2017-05-24 | 中兴通讯股份有限公司 | Data code stream sending method and device |
| WO2017084515A1 (en) * | 2015-11-16 | 2017-05-26 | 中兴通讯股份有限公司 | Method and device for transmitting data code stream |
| CN105446910A (en) * | 2015-11-24 | 2016-03-30 | 东软集团股份有限公司 | Data transmission methods and apparatus |
| CN105446910B (en) * | 2015-11-24 | 2019-01-25 | 东软集团股份有限公司 | A kind of data transmission method and device |
| CN105549900A (en) * | 2015-12-05 | 2016-05-04 | 中国航空工业集团公司洛阳电光设备研究所 | Data transmission analysis method and apparatus |
| CN109347883A (en) * | 2018-12-05 | 2019-02-15 | 南通星云智能科技有限公司 | A kind of expansible communication protocol data packet and its communication system |
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Inventor after: Wei Guangliang Inventor after: Wang Xiaodong Inventor after: Li Zheng Inventor after: Su Shining Inventor after: Gong Junyi Inventor after: Wei Ning Inventor after: Yao Zina Inventor after: Luo Mingsi Inventor before: Wei Guangliang Inventor before: Wang Xiaodong Inventor before: Luo Mingsi Inventor before: Li Zheng |
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