CN106850785A - A kind of physical message system data compression transmitting method of use sliding window caching - Google Patents
A kind of physical message system data compression transmitting method of use sliding window caching Download PDFInfo
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- CN106850785A CN106850785A CN201710041145.XA CN201710041145A CN106850785A CN 106850785 A CN106850785 A CN 106850785A CN 201710041145 A CN201710041145 A CN 201710041145A CN 106850785 A CN106850785 A CN 106850785A
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- Prior art keywords
- message system
- physical message
- sliding window
- data compression
- symbol
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- 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
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/565—Conversion or adaptation of application format or content
- H04L67/5651—Reducing the amount or size of exchanged application data
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- 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
- H04L67/50—Network services
- H04L67/56—Provisioning of proxy services
- H04L67/568—Storing data temporarily at an intermediate stage, e.g. caching
-
- 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
- H04L69/04—Protocols for data compression, e.g. ROHC
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
The present invention relates to a kind of data transmission method of physical message system, more particularly to a kind of physical message system data compression transmitting method of use sliding window caching.For there is mass data transmission in physical message system, the present invention is proposed a data compression transmission method compressed based on sliding window caching, when transmitting data in physical message system, is likely to duplicate in a stream the present invention.When there is a repetition, the sequence for repeating can be replaced with a short coding.Condensing routine scanning is such to be repeated, while generating coding to replace repetitive sequence.Over time, coding can reuse to capture new sequence.Decompression program can derive current mapping in coding and original data sequence.A kind of physical message system data compression transmitting method of use sliding window caching of the invention, its time that Data Matching compression can be greatly shortened, so as to improve data compression transmission speed.
Description
Technical field
The present invention relates to a kind of data transmission method of physical message system, more particularly to one kind is cached using sliding window
Physical message system data compression transmitting method.
Background technology
Physical message system is integrated calculating, communicates and be controlled in one as calculation procedure and the entity of physics process
The intelligence system of future generation of body.Information physical system realizes the interaction with physics process by Man Machine Interface, uses network
Change space and manipulate a physical entity in the way of long-range, reliable, real-time, safety, cooperation.Physical message system bag
The system engineerings such as environment sensing ubiquitous in the future, embedding assembly, network service and network control are contained, have made physical system
With calculating, communication, precise control, remote collaboration and autonomy function.Its emphasis computing resource is combined closely with physical resource
With coordination, it is mainly used in some intelligence systems equipment such as and interconnects, Internet of Things sensing, smart home, robot, intelligent navigation etc..
On the basis of environment sensing, the controllable credible expansible networking physics of depth integration calculating, communication and control ability sets
Standby system, it realizes depth integration and real-time, interactive to increase by calculation procedure and the interactional feedback cycle of physics process
Or new function is extended, a physical entity is detected or controlled in safe, reliable, efficient and real-time mode.
Sliding window compression is virtual by one, and the window that compression procedure is slided can be followed as term dictionary, to press
If the character string of contracting occurs in the window, export it and position and length occur.Term is carried out using fixed size window
Matching, matches, rather than in all encoded information because the time loss of matching algorithm is often a lot, it is necessary to limit
The size of dictionary processed just can guarantee that the efficiency of algorithm；With the process sliding dictionary window of compression, make wherein total comprising volume recently
The information that code is crossed, because for most of information, the character string to be encoded often is easier to look in nearest context
Gone here and there to matching.
Under prior art, for the mass data transmission in physics letter system system, current data compression transmission method is made
Slow, the problem more than error of transmission into transmission speed.
The content of the invention
In order to solve problem of the prior art, the invention provides a kind of physical message system of use sliding window caching
Data compression transmission method, its time that Data Matching compression can be greatly shortened, so as to improve data compression transmission speed.
The technical solution adopted in the present invention is as follows：
A kind of physical message system data compression transmitting method of use sliding window caching, comprises the following steps：
A, by the primary unpressed binary data stream in physical message system, according to the size of network bag, or transmission
The demand of unit, independent block；
B, the symbol being likely to occur for each block, the symbol for being occurred inside searching, or repetitive sequence symbol, formation
Number set；
C, new binary representation is found for each symbol.
The specific method of step C includes：
C1, since current compression position, investigate uncoded data, and attempt to find out matching word most long in sliding window
Symbol string, if it is found, then carrying out step C2, otherwise carries out step C3；
C2, output ternary symbol group（Off, len, c）, wherein off be window in matched character string opposite windows border it is inclined
Move, len is the length that can be matched, and c is character late, window is then slided backward into+1 character of len, continue step
C1；
C3, output ternary symbol group（0,0, c）, wherein c is character late, and window then is slided backward into len+1
Character, continues step C1.
Block is 1024Byte, 4KByte or 16KByte.
The beneficial effect brought of technical scheme that the present invention is provided is：
For there is mass data transmission in physical message system, the present invention proposes that one is pressed based on sliding window caching
The data compression transmission method of contracting, when transmitting data in physical message system, is likely to duplicate in a stream.When
When there is a repetition, the sequence for repeating can be replaced with a short coding.Condensing routine scanning is such to be repeated, while
Generation encodes to replace repetitive sequence.Over time, coding can reuse to capture new sequence.Decompression program can
Current mapping is derived in coding and original data sequence.
The invention provides a kind of physical message system data compression transmitting method of use sliding window caching, it can
The time of Data Matching compression is greatly shortened, so as to improve data compression transmission speed.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of method of the physical message system data compression transmitting method of use sliding window caching of the invention
Schematic diagram.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
As shown in Figure 1, the physical message system data compression transmitting method of a kind of use sliding window caching of the present embodiment,
Comprise the following steps：
（1）In physical message system, polytype data transfer is had, primary pressure is mainly wherein in digital display circuit
The binary data stream of contracting.
（2）To binary data stream, according to the size of network bag, or transmission unit demand, be divided into 1024Byte,
4KByte or 16KByte etc. independent block size.
（3）For each block, the symbol for being occurred inside searching, or repetitive sequence symbol, formation may go out
Existing assemble of symbol.
（4）For each symbol finds new binary representation, so that generally symbol uses little position, uncommon symbol
Use more position.Detailed process is：
I. since current compression position, uncoded data are investigated, and attempt to find out matching word most long in sliding window
Symbol string, if it is found, then carrying out step 2, otherwise carries out step 3.
Ii. output ternary symbol group (off, len, c).Wherein off is matched character string opposite windows side in window
The skew on boundary, len is the length that can be matched, and c is character late.Then window is slided backward into+1 character of len, after
Continuous step 1.
Iii. output ternary symbol group (0,0, c).Wherein c is character late.Then window is slided backward
+ 1 character of len, continues step 1.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (3)
1. a kind of physical message system data compression transmitting method of use sliding window caching, comprises the following steps：
A, by the primary unpressed binary data stream in physical message system, according to the size of network bag, or transmission
The demand of unit, independent block；
B, the symbol being likely to occur for each block, the symbol for being occurred inside searching, or repetitive sequence symbol, formation
Number set；
C, new binary representation is found for each symbol.
2. the physical message system data compression transmitting method that a kind of use sliding window according to claim 1 is cached,
Characterized in that, the specific method of the step C includes：
C1, since current compression position, investigate uncoded data, and attempt to find out matching word most long in sliding window
Symbol string, if it is found, then carrying out step C2, otherwise carries out step C3；
C2, output ternary symbol group（Off, len, c）, wherein off be window in matched character string opposite windows border it is inclined
Move, len is the length that can be matched, and c is character late, window is then slided backward into+1 character of len, continue step
C1；
C3, output ternary symbol group（0,0, c）, wherein c is character late, and window then is slided backward into len+1
Character, continues step C1.
3. the physical message system data compression transmitting method that a kind of use sliding window according to claim 1 is cached,
Characterized in that, described block is 1024Byte, 4KByte or 16KByte.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710041145.XA CN106850785A (en) | 2017-01-20 | 2017-01-20 | A kind of physical message system data compression transmitting method of use sliding window caching |
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| CN201710041145.XA CN106850785A (en) | 2017-01-20 | 2017-01-20 | A kind of physical message system data compression transmitting method of use sliding window caching |
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| CN201710041145.XA Pending CN106850785A (en) | 2017-01-20 | 2017-01-20 | A kind of physical message system data compression transmitting method of use sliding window caching |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115225724A (en) * | 2021-04-21 | 2022-10-21 | 北京特纳飞电子技术有限公司 | Data compression techniques using partitioning and irrelevant bit elimination |
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| CN103023511A (en) * | 2012-12-05 | 2013-04-03 | 云之朗科技有限公司 | Applied compressed encoding method and device |
| CN105187071A (en) * | 2015-09-29 | 2015-12-23 | 东北大学 | Pipeline millisecond online data compound compression/decompression method |
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| CN101523732A (en) * | 2006-09-01 | 2009-09-02 | 帕克比特软件股份有限公司 | Method and system for transmitting a data file over a data network |
| CN101469989A (en) * | 2007-12-29 | 2009-07-01 | 厦门雅迅网络股份有限公司 | Compression method for navigation data in mobile phone network navigation |
| CN102088604A (en) * | 2011-02-10 | 2011-06-08 | 深圳创维数字技术股份有限公司 | Method and device for compressing film thumbnails |
| CN103023511A (en) * | 2012-12-05 | 2013-04-03 | 云之朗科技有限公司 | Applied compressed encoding method and device |
| CN105187071A (en) * | 2015-09-29 | 2015-12-23 | 东北大学 | Pipeline millisecond online data compound compression/decompression method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115225724A (en) * | 2021-04-21 | 2022-10-21 | 北京特纳飞电子技术有限公司 | Data compression techniques using partitioning and irrelevant bit elimination |
| CN115225724B (en) * | 2021-04-21 | 2023-04-07 | 北京特纳飞电子技术有限公司 | Data compression techniques using partitioning and irrelevant bit elimination |
| CN116527775A (en) * | 2021-04-21 | 2023-08-01 | 北京特纳飞电子技术有限公司 | Data compression techniques using partition and don't care bit cancellation |
| CN116527775B (en) * | 2021-04-21 | 2024-07-05 | 北京特纳飞电子技术有限公司 | Data compression techniques using partition and don't care bit cancellation |
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Application publication date: 20170613 |