CN110445599A - A kind of synchronization transfer method of the internet of things networking data communication of content oriented - Google Patents
A kind of synchronization transfer method of the internet of things networking data communication of content oriented Download PDFInfo
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- CN110445599A CN110445599A CN201910581536.XA CN201910581536A CN110445599A CN 110445599 A CN110445599 A CN 110445599A CN 201910581536 A CN201910581536 A CN 201910581536A CN 110445599 A CN110445599 A CN 110445599A
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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
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
The invention discloses a kind of synchronization transfer methods of the internet of things networking data communication of content oriented, its data communication is using content as core, it is driven by data object request end, data object request end sends the request packet for having required Data Identification, once the request packet reaches the node for having request data, data object request end and data object publishing end have the transmission state return value of transmission packet；Using the transmission state return value as the judgment basis of data Successful transmissions, judged simultaneously at communication both ends, if return value when being simultaneously successfully transmitting-receiving, illustrates that a data are transmitted；Otherwise data object request end re-starts request of data, until completing data transmission, so recycles, data object request end and the one-to-one matching of data object publishing end data non-persistent transmission and synchronous transmitting-receiving can be realized.The present invention can satisfy the clock synchronization transmissions that internodal data is routed in the internet of things networking of content oriented.
Description
Technical field
The invention belongs to the internet of things networking communications fields, especially between the internet of things networking routing node of content oriented
The clock synchronization issue of data transmission.
Background technique
Information centre's network (Information-Centric Networking, ICN) is a kind of completely new interconnection Netcom
Believe architectural framework, using data content as core, the main body of data transmission is with the data packet of mark (name), and transmission is to pass through
Mark (name) driven with the mapping relations before data, it is unrelated with the position of data in a network, have mobility by force, and
Not the advantages that network address independence, connection session do not depend on type, multihoming, Multi net voting.It fundamentally changes the envelope of IP packet
Assembling structure and addressing system are conducive to mobile communication equipment Handover, reduce communication delay, solve conventional internet framework
Under can not cope with high-speed mobile communications, the problems such as IP address space exhausts, network transmission efficiency is low, safety is poor.
Naming data network (Name Data Networking, NDN) is the one of Future-oriented Internet Architecture special item
A basic research information centre network articles, its communication strategy are driven by requesting party completely, request direction Web broadcast request
Packet is based on two transmission Packet types, and one is request packet (Interest), another kind is data packet (Data), and the two is according to complete
Whole or opposite name is matched.Data name be for bottom-layer network it is fully transparent, allow for each answer in this way
The numerical nomenclature rule that oneself can be formulated in their own needs with program, using hierarchical structure, is conducive to be transmitted across
It is matched in journey according to the longest common prefix of name.Data packet during transmission can be by router cache, with full
The subsequent identical data recourse requests of foot, to realize the multiplexing of data.Network conflict and congestion are not only avoided from principle,
Get rid of and transmit dependence to end to end connection, thoroughly realize multilink routing, realize content truly it is shared,
Intelligence forwarding, reduces network load, improves the transmission rate of data in a network.
As one kind using data content as core, user demand is the Novel Internet traffic model of guiding, its data
Transmission is unrelated with position, this provides support for scalability, mobility required for Internet of Things.In the internet of things networking of content oriented
Automated data transmission process in, once transmission the non-successful match of packet title, data transmission will interrupt, will lead to for a long time
Transmission packet time-out, needs artificially to carry out data transmission the recovery of process.Therefore, in order to carry out more efficient, reliable transmission,
How to guarantee that the one-to-one matching that packet is transmitted between data transmit-receive end is a problem to be solved with synchronous transmitting-receiving.
Summary of the invention
For the internet of things networking data communication clock synchronization issue of content oriented, the invention proposes a kind of content orienteds
Internet of things networking data communication synchronization transfer method, mainly by judge communication terminal transmit packet transmission state return
Value realizes that the one-to-one matching of lasting data transmission is received and dispatched with synchronous.
In order to solve the above-mentioned technical problem, a kind of internet of things networking data communication of content oriented proposed by the present invention is same
Transmission method is walked, data communication is to be driven using content as core by data object request end, and data object request end sends and has
The request packet of required Data Identification, once the request packet reaches the node for having request data, data object request end sum number
The transmission state return value of transmission packet is had according to object publishing end；Using the transmission state return value as data Successful transmissions
Judgment basis realizes that data object request end is received with the one-to-one matching of data object publishing end data non-persistent transmission with synchronous
Hair.
Further, judgment basis of the transmission state return value as data Successful transmissions, by judging data pair
As the transmission state return value of request end and data object publishing end transmission packet, and then judge whether that completing a data leads to
Letter；If return value when being simultaneously successfully transmitting-receiving, a data transmission is completed, is ready for communicating next time；If gone out
The return value of existing one end is different from when successfully receiving and dispatching, then data object request end re-starts request of data, so recycles；Until
Complete data transmission.
Data object request end sends the request packet of request data, and the transmission state return value of the request packet is stored in text
Shelves；Judge whether the return value is requested content-data, if so, data object request end is changed with certain naming rule
Become request packet mark, is communicated next time；If it is not, then keeping transmission packet mark constant, until transmission success；Number
The request packet of data object request end transmission is received according to object publishing end, inquiry content routing table carries out the title of content-data packet
Matching generates transmission state return value, which is stored in document；Judge whether the return value is content-data
Value when packet normally returns, if so, data object publishing side is counted with the mark that identical naming rule changes transmission packet
According to packing, communicated next time；If it is not, then keeping transmission packet mark constant, until transmission success.
Compared with prior art, the beneficial effects of the present invention are: by the dual judgement to communication both ends, and then guarantee number
According to the Accuracy and high efficiency of synchronous transfer, therefore the one-to-one matching that lasting data transmission may be implemented is received and dispatched with synchronous.
Detailed description of the invention
Fig. 1 is to name the program flow diagram that the data synchronous transfer in data object request end communicates under data network
Fig. 2 is to name the program flow diagram that data synchronous transfer of data object publishing side communicates under data network
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described further, but following embodiments are absolutely not to this hair
It is bright to have any restrictions.
It names in data network, the mark for transmitting packet is data name, a series of binary system that essence is made of components
Object can formulate numerical nomenclature rule, in transmission process most according to name using hierarchical structure in their own needs
Long common prefix is matched, and after communicating pair establishes connection under same Wifi environment, can carry out data communication.Data object
Request end sends the data request packet for carrying request data title, and when the request packet is by correct response, request end generates clear
Transmission state return value.Correspondingly, when the request packet for having request data reaches data object publishing side, inquiry content routing
Table carries out the name-matches of content-data packet, if the entry of same names or identical longest common prefix, it will response is asked
Packet is sought, the transmitting path along request packet returns content-data packet, while generating specific transmission state return value.
A kind of synchronization transfer method of the internet of things networking data communication of content oriented proposed by the present invention, data communication are
Using content as core, being driven by data object request end, data object request end sends the request packet for having required Data Identification,
Once the request packet reaches the node for having request data, data object request end and data object publishing end have transmission
The transmission state return value of packet；Using the transmission state return value as the judgment basis of data Successful transmissions, by judging data
The transmission state return value at object requests end and data object publishing end transmission packet, and then judge whether that completing a data leads to
Letter；If return value when being simultaneously successfully transmitting-receiving, a data transmission is completed, is ready for communicating next time；If gone out
The return value of existing one end is different from when successfully receiving and dispatching, then data object request end re-starts request of data, so recycles, until
Complete data transmission, thus realize data object request end and data object publishing end data non-persistent transmission one-to-one matching and
Synchronous transmitting-receiving.
Embodiment 1:
In the present invention, communicated using data object request end data synchronous transfer in the Internet of Things of name data network specific
Example is as described below:
Data object request end generates the data request packet for carrying request data title and carries out routing forwarding, by generation
Transmission state return value is stored in document, and the data value extracted in document is judged judge whether the return value is to be requested
Content-data, if this return value is identical as the return value of failed data communication, illustrate communicate both ends routing do not connect normally
Connect or the content routing table of data object publishing side in there is no the titles or with the entry of the entitled prefix, i.e. content-data
Bao Wei by successfully return, receive, then keep request packet carry title it is constant, continue to use the title attempt data transmission until
Until success；If this return value is other values, that is, receive requested data content, illustrate to communicate both ends data transmission at
Function, data object request end change request packet with certain naming rule automatically and carry title, and it is logical to be ready for data next time
Letter so recycles, to realize request packet and the one-to-one matching of content-data packet non-persistent transmission and synchronous transmitting-receiving.Program circuit
Figure is as shown in Figure 1.
Embodiment 2:
In the present invention, communicated using data object publication end data synchronous transfer in the Internet of Things of name data network specific
Example is as described below:
The request data name query content routing table that data object publishing side is carried according to data request packet carries out content
The name-matches of data packet, the request packet sent by passback content-data packet respond request end, and generate transmission state return
Value.Publishing side executes " echo $ " instruction judges the state of content-data packet passback, and the return value of the instruction is stored in document,
Judge whether the return value is value when content-data packet normally returns, if this return value successfully counts when normally connecting with routing
It is identical according to communication return value, illustrate in the content routing table of routing node there are the data name or with the item of the entitled prefix
Mesh, publishing side return content-data packet, complete a data transmission, while using name identical with data object request end
The content-data packet title (transmitting the mark of packet) of regular automatic change inquiry, is ready for data communication next time.If this
Return value is other values, then keeps Query Name constant, until transmission success, so recycle, thus realize request packet and
The one-to-one matching of content-data packet non-persistent transmission is received and dispatched with synchronous.Program flow diagram is as shown in Figure 2.
To sum up, the data communication of the internet of things networking of content oriented of the present invention is to be asked using content as core by data object
End is asked to drive.Data object request end sends the request packet for having required Data Identification, once the request packet reaches one, ask the visitor in
The node of data is sought, the data packet for carrying Data Identification and data content will be just returned.Using name data net system
The Internet of Things wireless data communication of framework is example, by judging that communicating pair transmits the return value of packet transmission state, reaches several
It is received and dispatched according to the one-to-one matching of non-persistent transmission with synchronous.
Although above in conjunction with attached drawing, invention has been described, and the invention is not limited to above-mentioned specific implementations
Mode, the above mentioned embodiment is only schematical, rather than restrictive, and those skilled in the art are at this
Under the enlightenment of invention, without deviating from the spirit of the invention, many variations can also be made, these belong to of the invention
Within protection.
Claims (3)
1. a kind of synchronization transfer method of the internet of things networking data communication of content oriented, data communication be using content as core,
It being driven by data object request end, data object request end sends the request packet for having required Data Identification, once the request packet
The node for having request data is reached, data object request end and data object publishing end have the transmission state of transmission packet
Return value；It is characterized in that, realizing that data object is asked using the transmission state return value as the judgment basis of data Successful transmissions
Ask end and the one-to-one matching of data object publishing end data non-persistent transmission and synchronous transmitting-receiving.
2. the synchronization transfer method of the internet of things networking data communication of content oriented according to claim 1, which is characterized in that
Judgment basis of the transmission state return value as data Successful transmissions, by judging data object request end and data object
The transmission state return value of publishing side transmission packet, and then judge whether to complete a data communication；If being simultaneously successfully to receive
Return value when hair then completes a data transmission, is ready for communicating next time；If there is one end return value with successfully
The different situation of return value when transmitting-receiving, then data object request end re-starts request of data, so recycles；Until completing number
According to transmission.
3. the synchronization transfer method of the internet of things networking data communication of content oriented according to claim 2, which is characterized in that
Data object request end sends the request packet of request data, and the transmission state return value of the request packet is stored in document；Sentence
Whether the return value of breaking is requested content-data, if so, data object request end is asked with certain naming rule change
It asks packet to identify, is communicated next time；If it is not, then keeping transmission packet mark constant, until transmission success；
Data object publishing side receives the request packet of data object request end transmission, and inquiry content routing table carries out content-data packet
Name-matches, generate transmission state return value, by the transmission state return value be stored in document；Judge whether the return value is interior
Hold value when data packet normally returns, if so, data object publishing side changes the mark of transmission packet with identical naming rule
Data packing is carried out, is communicated next time；If it is not, then keeping transmission packet mark constant, until transmission success.
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| CN201910581536.XA CN110445599B (en) | 2019-06-29 | 2019-06-29 | Content-oriented Internet of things networking data communication synchronous transmission method |
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| CN201910581536.XA CN110445599B (en) | 2019-06-29 | 2019-06-29 | Content-oriented Internet of things networking data communication synchronous transmission method |
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| WO2016091886A1 (en) * | 2014-12-11 | 2016-06-16 | E2V Semiconductors | Method for synchronously distributing a digital signal over n identical adjacent blocks of an integrated circuit |
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| CN103401795A (en) * | 2013-08-07 | 2013-11-20 | 电子科技大学 | Method for eliminating redundancy of transmission contents in content central network |
| WO2016091886A1 (en) * | 2014-12-11 | 2016-06-16 | E2V Semiconductors | Method for synchronously distributing a digital signal over n identical adjacent blocks of an integrated circuit |
| CN104967677A (en) * | 2015-06-05 | 2015-10-07 | 无锡量子云数字新媒体科技有限公司 | File transmission method and apparatus based on NDN cache optimization |
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