CN109150406B - Data packet subpackaging method for byte stream communication - Google Patents
Data packet subpackaging method for byte stream communication Download PDFInfo
- Publication number
- CN109150406B CN109150406B CN201811097523.7A CN201811097523A CN109150406B CN 109150406 B CN109150406 B CN 109150406B CN 201811097523 A CN201811097523 A CN 201811097523A CN 109150406 B CN109150406 B CN 109150406B
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- byte
- bit7
- bytes
- data
- packet header
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 title claims abstract description 13
- 238000012856 packing Methods 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims abstract description 3
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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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
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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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
- H04L1/0078—Avoidance of errors by organising the transmitted data in a format specifically designed to deal with errors, e.g. location
- H04L1/0079—Formats for control data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/22—Parsing or analysis of headers
Abstract
A data packet sub-packaging method for byte stream communication belongs to the technical field of communication. The method comprises the following steps: distinguishing a packet header; packing by a sender; and unpacking by a receiver. The method is time-saving and resource-saving.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a data packet subpackaging method for byte stream communication.
Background
In byte stream communication, the current data packet subpackaging method has the defect of high energy consumption, and is not beneficial to resource saving.
Disclosure of Invention
In order to solve the above problems, the present invention provides a method for packetizing data packets for byte stream communication, the method comprising the steps of: distinguishing a packet header; packing by a sender; and unpacking by a receiver.
Preferably, the sender packing method includes:
the assignment of the 9 th byte of the buffer area is zero, and the bit7 of the 6-byte load (data to be sent) is filled into the bit 0-5 of the 9 th byte of the buffer area;
calculating the XOR check of 6 bytes of source load data, filling bit7 of a check code into bit6 of the 9 th byte of a sending cache, setting the bit7 of the check code to be 0 and filling the bit into the 8 th byte of a cache region;
setting bit7 of 6-byte load to 0 and then sequentially filling the bit7 into 2 nd to 7 th bytes of a buffer area;
and generating a packet header as required and then transmitting the packet header.
Preferably, the unpacking step of the receiving side includes:
step 1: when the byte of bit7 is 1 and the addresses match, the header is considered to be stored in the receiving buffer;
step 2: continuously receiving 8 bytes with bit7 being 0, storing the bytes into a cache, and if the subsequent bytes have bit7 being 1, determining that the communication is faulty and returning to the step 1;
and step 3: restoring the load and the check code by using the 9 th byte, checking the 2 nd to 7 th bytes, and returning to the step 1 if the checking fails; and (5) successfully checking to obtain the instruction of the sender.
The method of the invention can be continuously or discontinuously transmitted without time limitation; because strict time sequence control is not needed, CPU resources such as a timer can be saved; and the bandwidth utilization rate is also improved because the time delay is not needed.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The invention provides a data packet subpackaging method for byte stream communication, which comprises the following steps:
distinguishing a packet header; packing by a sender; and unpacking by a receiver.
For example convention (not limited to this approach): fixed-length data packets (9 bytes). It is agreed that the first bit (bit7) of each byte is a header flag bit, 1 indicates a header, and the flag bits of other data are 0.
Wrapping head
The first byte is a packet header, and the flag bit is 1; the slave enables: the values 1-4 of bits 0-3 represent drivers 1-4 respectively, 0 represents mass sending, and 5 represents a host; slave reply enable: the values of bits 4-6 indicate that the corresponding driver # 1-4 is allowed to reply to the command, and when equal to 0, no slave replies are allowed (only when the corresponding slave receives the command and the slave reply enable is equal to the slave number).
Payload data
The 2 nd to 7 th bytes are data after the source load data bit7 is set to 0.
Verification
The source payload data is in turn bitwise xored and bit7 is set to 0.
Bit7 of the first 7 bytes
Bit0 is Bit7 of the first byte of the source payload data, and … … through Bit6 in turn are Bit7 of the source parity value.
Specifically, the sender packaging method includes: the assignment of the 9 th byte of the buffer area is zero, and the bit7 of the 6-byte load (data to be sent) is filled into the bit 0-5 of the 9 th byte of the buffer area; calculating the XOR check of 6 bytes of source load data, filling bit7 of a check code into bit6 of the 9 th byte of a sending cache, setting the bit7 of the check code to be 0 and filling the bit into the 8 th byte of a cache region;
setting bit7 of 6-byte load to 0 and then sequentially filling the bit7 into 2 nd to 7 th bytes of a buffer area;
and generating a packet header as required and then transmitting the packet header.
Specifically, the unpacking step of the receiver includes:
step 1: when the byte of bit7 is 1 and the addresses match, the header is considered to be stored in the receiving buffer;
step 2: continuously receiving 8 bytes with bit7 being 0, storing the bytes into a cache, and if the subsequent bytes have bit7 being 1, determining that the communication is faulty and returning to the step 1;
and step 3: restoring the load and the check code by using the 9 th byte, checking the 2 nd to 7 th bytes, and returning to the step 1 if the checking fails; and (5) successfully checking to obtain the instruction of the sender.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations as fall within the scope and boundaries of the appended claims, or the equivalents of such scope and boundaries.
Claims (1)
1. A method for packetizing data packets for byte stream communication, the method comprising: distinguishing a packet header; packing by a sender; unpacking by a receiver;
a fixed-length data packet with 9 bytes, wherein a first bit7 of each byte is appointed as a header flag bit, 1 represents a packet header, and flag bits of other data are 0;
the sender packaging method comprises the following steps:
the assignment of the 9 th byte of the buffer area is zero, and bit7 of 6 data byte loads to be sent is filled into bit 0-5 of the 9 th byte of the buffer area; calculating the XOR check of 6 bytes of source load data, filling bit7 of a check code into bit6 of the 9 th byte of a sending cache, setting the bit7 of the check code to be 0 and filling the bit into the 8 th byte of a cache region;
setting bit7 of 6-byte load to 0 and then sequentially filling the bit7 into 2 nd to 7 th bytes of a buffer area;
generating a packet header according to the requirement and then sending the packet header;
the unpacking step of the receiver comprises the following steps:
step 1: when the byte of bit7 is 1 and the addresses match, the header is considered to be stored in the receiving buffer;
step 2: continuously receiving 8 bytes with bit7 being 0, storing the bytes into a cache, and if the subsequent bytes have bit7 being 1, determining that the communication is faulty and returning to the step 1;
and step 3: restoring the load and the check code by using the 9 th byte, checking the 2 nd to 7 th bytes, and returning to the step 1 if the checking fails; and (5) successfully checking to obtain the instruction of the sender.
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CN201811097523.7A CN109150406B (en) | 2018-09-20 | 2018-09-20 | Data packet subpackaging method for byte stream communication |
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CN201811097523.7A CN109150406B (en) | 2018-09-20 | 2018-09-20 | Data packet subpackaging method for byte stream communication |
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CN109150406A CN109150406A (en) | 2019-01-04 |
CN109150406B true CN109150406B (en) | 2021-05-25 |
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Citations (6)
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US7643486B2 (en) * | 2000-02-14 | 2010-01-05 | Cisco Technology, Inc. | Pipelined packet switching and queuing architecture |
CN101877793A (en) * | 2009-06-01 | 2010-11-03 | 杭州海康威视软件有限公司 | Data transmitting method, error detecting method, system thereof and device thereof |
CN103763374A (en) * | 2014-01-23 | 2014-04-30 | 深圳联友科技有限公司 | Method and device for data transmission based on UDT |
CN106817367A (en) * | 2017-01-03 | 2017-06-09 | 深圳市沃特玛电池有限公司 | A kind of data transmission method and system |
CN206254662U (en) * | 2016-11-30 | 2017-06-16 | 南京富士通电子信息科技股份有限公司 | A kind of printer with NFC coils |
CN107580768A (en) * | 2015-07-17 | 2018-01-12 | 华为技术有限公司 | The methods, devices and systems of message transmissions |
-
2018
- 2018-09-20 CN CN201811097523.7A patent/CN109150406B/en active Active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7643486B2 (en) * | 2000-02-14 | 2010-01-05 | Cisco Technology, Inc. | Pipelined packet switching and queuing architecture |
CN101877793A (en) * | 2009-06-01 | 2010-11-03 | 杭州海康威视软件有限公司 | Data transmitting method, error detecting method, system thereof and device thereof |
CN103763374A (en) * | 2014-01-23 | 2014-04-30 | 深圳联友科技有限公司 | Method and device for data transmission based on UDT |
CN107580768A (en) * | 2015-07-17 | 2018-01-12 | 华为技术有限公司 | The methods, devices and systems of message transmissions |
CN206254662U (en) * | 2016-11-30 | 2017-06-16 | 南京富士通电子信息科技股份有限公司 | A kind of printer with NFC coils |
CN106817367A (en) * | 2017-01-03 | 2017-06-09 | 深圳市沃特玛电池有限公司 | A kind of data transmission method and system |
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Effective date of registration: 20231008 Address after: No. 317, 3rd Floor, Building 1, No. 55, Qingheli South Section, Jinjiang District, Chengdu, Sichuan Province, 610000 Patentee after: Chengdu Golden Mask Technology Co.,Ltd. Address before: Unit 2, building 3, Huanhua community, No.116, West 1st section of 2nd Ring Road, Qingyang District, Chengdu, Sichuan 610000 Patentee before: Ding Shunmin |