CN101064910A - Call control based terminal-to-terminal breakpoint transmission method - Google Patents

Call control based terminal-to-terminal breakpoint transmission method Download PDF

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Publication number
CN101064910A
CN101064910A CNA2006100259933A CN200610025993A CN101064910A CN 101064910 A CN101064910 A CN 101064910A CN A2006100259933 A CNA2006100259933 A CN A2006100259933A CN 200610025993 A CN200610025993 A CN 200610025993A CN 101064910 A CN101064910 A CN 101064910A
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file
recipient
transmission
send
transmit leg
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CNA2006100259933A
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CN101064910B (en
Inventor
顾青
陆蓓婷
靳胜勇
蒋文创
周卫红
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Shanghai Information Safety Infrastructure Research Center
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WELLHOPE INFORMATION TECHNOLOGY Co Ltd
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Abstract

The invention discloses end-to-end break transferring method based on call control, on the TCP layer based on equal network transmission, the receiver loads the dynamic linking library, and it can realize the end-to-end break transferring via the interface of application program, the steps includes: first the transmitter initializes, starts the main line program of monitoring; when one starts transmitting files or one requires the other to transmit files, it enters the transmitting flow, after the transmitting-receiving sides make agreement, the transmitter starts to transmit file, and the transmitting-receiving sides record the start location and the length of file automatically, if one exit in the transmitting course, and then enters the breaking flow, and the breakpoint file is recorded on the log; next time one side requires the file transmission, then enter the anew transmitting flow, until the file is load completely. The invention solves the problems that scope of application of the break transferring function is single, it has extended scope, the break transferring method can be used in any communication mode in IP network to transmit data to solve the data break problems; it can search and negotiates the data source automatically.

Description

A kind of based on the end-to-end breaker point continuous transmission method of calling out control
Technical field
The present invention relates to transfer of data Interrupt Process mode in a kind of computer network communication, relate in particular to a kind of end-to-end breaker point continuous transmission method, belong to field of network communication based on calling control.
Background technology
In the transfer of data of IP network, during situations such as network quality is poor when running into, reception data side disconnects, provides the disconnection of data side, can cause the interruption of data, the data of having transmitted are incomplete, and when needs use these data, must transmit new file again, inconvenience and the waste of network resources of having brought the user to use like this, therefore, a lot of schemes are devoted to head it off, proposed various breakpoint continuous transmission method, the domestic and international technology that adopts mainly contains following two kinds at present:
A kind of is that emphasis solves HTTP, data interruption problem on the File Transfer Protocol layer: in the structure of IP network, HTTP, FTP is based on the simple application layer host-host protocol on the Transmission Control Protocol, most breakpoint transmission scheme all is to solve HTTP, data interruption problem on the File Transfer Protocol layer, the product of scheme also is widely used in C/S model, breakpoint transmission as the download of NetAnts data, this scheme is a kind of employing C/S network schemer, select FTP or http protocol to carry out the data downloaded software in the use, by the breakpoint of multithreading real-time recorded data, realize the breakpoint transmission downloaded software.
This scheme shortcoming mainly is the breakpoint transmission function that realizes on the upper strata to make the scope of application narrow, and the data source side must be fixed simultaneously, and transmission speed also is confined to the performance of data source side, can't flexible expansion;
Another kind is to be unified in the TCP layer to solve the transfer of data disruption, be based upon on the free peer-to-peer network basis, by technology such as seeds, realize distributing data, search data, decomposition data, the method for service recorder recipient breakpoint realizes breakpoint transmission problem in the equity transmission simultaneously on the basis of the data decomposition of same seed; The product of this technology has BT etc.
The shortcoming of this scheme is free completely equity, do not have to trust and safe control, the quality of data source and copyright can not get ensureing, distributing data, search data are brought copyright problem, problem of information asymmetry simultaneously, data transmission procedure can not be controlled voluntarily by the user simultaneously, whom is, refuses certain user's transmission, interrupts transmission etc. as prompting the other side; Simultaneously, because issue, search and transmission are integrated, need to make seed separately and issue.
The scheme of breakpoint transmission function in the market all is the data transmission problems that solves in the C/S model, can not be used in other network communication mode, and especially end-to-end data transmission problems does not solve in the peer-to-peer network.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, propose a kind of based on the end-to-end breaker point continuous transmission method of calling out control, by the dynamic link library software, provide series interfaces to finish the breakpoint transmission function, and can depend on any end software, be that any end that loads this dynamic link library in the peer-to-peer network of calling out control can use the breakpoint transmission function, and can be simultaneously as data source side and data receiver.
Another purpose of the present invention is to propose a kind of end-to-end breaker point continuous transmission method based on calling control, P2P (the Peer to Peer that proposes based on the TCP layer of bottom, end-to-end transmission or peer-to-peer network) breakpoint transmission of data, be applicable to any communication pattern in the IP network, automatically search, negotiation data source, and realized transmitted in both directions.
The objective of the invention is to be achieved through the following technical solutions, based on the end-to-end breaker point continuous transmission method of calling out control, transmit at the TCP layer, comprise that receiving-transmitting sides all loads dynamic link library, realize end-to-end breakpoint transmission by the application programming interfaces that provide in the dynamic link library, comprise in the dynamic link library, file sends API (Application Programming Interface API), receives file API, cancels the file re-transmission API that once sends API, transmission course report API and do not send, and comprises the steps: at least
At first transmit leg is realized software initialization, starts to monitor main thread;
Select File then, enter transmission flow, call transmission interface and recipient and consult, consults successfully after, transmit leg calls file transmission API and sends file, the recipient calls reception file API and receives file, receiving-transmitting sides calls transmission course report API record corresponding file starting position and length automatically, if a side withdraws from transmission course, then enters to transmit and interrupts flow process, call cancellation and once send API, the breakpoint file is charged to daily record;
One side reached the standard grade once more and carried out the continuous biography inquiry of file next time, entered and resend flow process, called the file that does not send and retransmitted API, continued to send;
If a side withdraws from once more, enter the interruption flow process once more, download until file and finish.
Transmit leg and recipient's full duplex are worked, and can be used as the transmit leg and/or the recipient of another transport process.
The described flow process that resends comprises, if the recipient is online, after transmit leg is reached the standard grade, calls the file that does not send and retransmits API during continuous the biography, obtains user number and breakpoint listed files, after communicating by letter with the recipient, consulting success, continues to transmit.
Described dynamic link library also comprises: trust network lands notice API, network file search API.
The described flow process that resends comprises, if the recipient reaches the standard grade, will check Download History during continuous the biography, is undertaken and will consult automatically by calling out control, calls network file search API simultaneously and searches the information point that other can continue biography, continues to send.
Described transmission flow also comprises: call trust network and land notice API, be provided at the information that trust network lands and the agreement of trust network, comprise H.323/SIP.
The technical scheme that the present invention proposes, its advantage is:
1, the present invention is based on the solution that the TCP layer proposes, therefore solved the single problem of the scope of application of the continuous energy of passing on Gong of the transfer of data point of interruption, applied widely, any communication pattern can use the mode of breakpoint transmission to carry out transfer of data and solve the data interruption problem in IP network.
2, the present invention is based on the solution of peer-to-peer network, has therefore also solved simultaneously in the continuous biography of the breakpoint downloaded software, provides the data location to fix, and performance is fixed, and the quality of data source and data transmission channel quality can not get the effectively problem of guarantee; Can search for automatically, automatic negotiation data source; Data source and data channel quality height;
3, solved in the present breakpoint transmission software, data source is single, causes data transmission bauds to have the problem of performance bottleneck; Transmission speed is fast;
4, solved present breakpoint transmission and downloaded in the software, the transfer of data that makes of C/S model can only be the problem of one-way transmission.Realized transmitted in both directions, can make an end is the data providers, is again the data receiver; It is little that software takies disk space, and loading requires low, adds carried convenient;
5, this programme has used and has called out control, also promptly based on packet switch H.323, call network such as SIP can use, it is uncontrollable also just to have solved in the peer-to-peer network transmission, the problem that the quality of data source and copyright can not get protecting; The synchronization log record is provided, can completely checks whole transmission course; The interface of calling out control is provided, in trust network, has used safelyr, the solution of data source quality and copyright problem also is provided simultaneously;
6, the present invention uses the breakpoint recording mode of byte level, and separately realizes, so do not need to make separately seed with issue, search link; Effective to any formatted data, do not need to make separately seed;
Description of drawings
Fig. 1 is the flow chart based on the end-to-end breaker point continuous transmission method of transmission control;
Fig. 2 is for sending the flow chart of file;
Fig. 3 is for interrupting the flow chart of a process of transmitting;
Fig. 4 retransmits the flow chart that send a file for transmit leg;
The flow chart that Fig. 5 continues to receive for the recipient.
Embodiment
Describe technical scheme of the present invention in detail below in conjunction with accompanying drawing.
The object of the invention discloses a kind of based on the end-to-end breakpoint continuous transmission method of calling out control, design philosophy is, the dynamic link library of this method of realization is provided, comprise the series interfaces of finishing the breakpoint transmission function, have file to send API (Application Programming Interface API), receive file API, cancellation once sends API, transmission course report API, the file that does not send retransmits API, and trust network lands notice API and network file search API etc.Because its form is a dynamic link library, therefore can depend on any end software simultaneously, promptly any end that loads this dynamic link library in the peer-to-peer network of calling out control can use the breakpoint transmission function, and can be simultaneously as data source side and data receiver.
Its basic principle is, provide initialization interface to realize software initialization, start separate threads and monitor independently port numbers, this port numbers can dynamic-configuration, thereafter, provide series interfaces to send data file, the user is provided in this series interfaces the agreement at trust network log-on message and trust network, can supports H.323/SIP to wait, can search for required file this moment automatically in this trust network, when receiving file, can whether receive simultaneously by interface prompting loading side, called by loading side and to receive file interface and receive, receive the prompting interface that the progress that receives also is provided simultaneously, the progress that makes transfer of data as seen, send the reception both sides and all can write down the respective transmissions point automatically this moment, as this moment software withdraw from, then transmission is interrupted, both sides will be transmitted some records automatically, when the user started software and carried out initialization again next time, to carry out the continuous biography inquiry of file, after obtaining confirming, software is undertaken and will consult automatically by calling out control, search the information point that other can continue biography simultaneously, reach the purpose of multicast communication; This process is succinctly automatic, and interface is clear, and is easy to use, the complete disruption that has solved end-to-end transfer of data.
Fig. 1 is the flow chart based on the end-to-end breaker point continuous transmission method of transmission control, beginning, and transmit leg carries out software initialization, starts the main thread of monitoring; Transmit leg is communicated by letter with the recipient and is consulted, enter transmission flow after consulting, transmit leg and recipient consult, consults successfully after, transmit leg calls file transmission API and sends file, the recipient calls reception file API and receives file, receiving-transmitting sides calls transmission course report API record corresponding file starting position and length automatically, if a side withdraws from transmission course, then enters to transmit and interrupts flow process, call cancellation and once send API, the breakpoint file is charged to daily record; One side reached the standard grade once more and carried out the continuous biography inquiry of file next time, entered and resend flow process, called file and retransmitted API, continued to send; If a side withdraws from once more, enter the interruption flow process once more, to download until file and finish, the transmit leg record sends successful daily record, recipient's recorder success daily record.
Transmit leg and recipient's full duplex mode are worked, and can be used as the transmit leg and/or the recipient of another transport process.The present invention is based on the scheme that peer-to-peer network provides, and transmitted in both directions is supported in the breakpoint transmission in this scheme, and the person can receive and send simultaneously promptly to use software.
Fig. 2 is for sending the general flow of file, transmit leg carries out software initialization, the main thread of start monitoring, watcher thread receive after the connection according to type of message (obtain fileinfo, send file data, send new file, resend file), and handle this type of message; Transmit leg calls file transmission API and sends file, receiving-transmitting sides calls transmission course report API record corresponding file starting position and length automatically, the file of transmission from the starting position to the designated length, after data are sent completely, the transmit leg record sends successful daily record, recipient's recorder success daily record; The transmitting-receiving of next time is monitored in all online continuation of transmit leg and recipient then.
If transmit leg withdraws from sending the file process unusually, or the recipient withdraws from receiving the file process unusually, then enter the process that sends file of interrupting, Fig. 3 is for interrupting the flow chart of a process of transmitting, one side of interrupting transmitting calls cancellation and once sends API, the opposing party sends or receives the file failure, and transmit leg writes daily record with the file transmit status, and the recipient writes daily record with the file accepting state; Withdraw from then.
Fig. 4 retransmits the flow chart that send a file for transmit leg.If in the recipient that has no progeny online, after transmit leg was reached the standard grade once more, transmit leg called the file that does not send and retransmits API, obtains user number SipNo. and breakpoint listed files IpList, after communicating by letter with the recipient, consulting success, continued to transmit.
The flow chart that Fig. 5 continues to receive for the recipient.If in the transmit leg of having no progeny online, the recipient reaches the standard grade and thinks continuous transmitting file, the recipient will check the Download History daily record, consult automatically by calling out control, call network file search API simultaneously and search the information point that can continue biography, continue transmission.The transmission website of this moment is not limited only to transmit to the recipient originally the transmission website of file, can be other websites that have this document and start in the network.
The present invention is by solving the data breakpoint transmission problem in the bottom peer-to-peer network, solved the disruption of any end-to-end transfer of data on the common IP network, and because the C/S communication pattern is a kind of special form of expression of peer-to-peer network, thereby the present invention also is applicable in the C/S communication pattern simultaneously.
The present invention provides the data source search according to calling out control, has guaranteed the active data source, carries out session negotiation by calling control simultaneously and has also solved the data transmission channel quality problems; The present invention can consult a plurality of data sources simultaneously and carry out transfer of data, and not only transmission speed is multiplied, and does not also have the bottleneck problem of transmission speed simultaneously.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.

Claims (6)

1. one kind based on the end-to-end breaker point continuous transmission method of calling out control, transmit based on peer-to-peer network at the TCP layer, it is characterized in that: dynamic link library is provided, comprise, file sends application programming interfaces, receives the application of file interface, cancellation once sends application programming interfaces, transmission course reporting application interface, the file that does not send retransmits application programming interfaces, transmit leg and recipient load dynamic link library, realize end-to-end breakpoint transmission by the application programming interfaces that provide in the described dynamic link library, at least also comprise the steps:
At first described transmit leg carries out software initialization, starts to monitor main thread;
Enter transmission flow then, transmit leg and recipient consult, after consulting successfully, transmit leg calls file transmission application programming interfaces and sends file, the recipient calls reception application of file interface and receives file, and receiving-transmitting sides calls transmission course reporting application interface record corresponding file starting position and length automatically, if a side withdraws from transmission course, then enter and transmit to interrupt flow process, call cancellation and once send application programming interfaces the breakpoint file is charged to daily record;
One side reached the standard grade once more and carried out the continuous biography inquiry of file next time, entered and resend flow process, called the file that does not send and retransmitted application programming interfaces, continued to send;
If a side withdraws from once more, enter described transmission once more and interrupt flow process, download until file and finish.
2, according to claim 1 based on the end-to-end breaker point continuous transmission method of calling out control, it is characterized in that, the described flow process that resends, comprise, online during continuous the biography as if the recipient, after transmit leg is reached the standard grade, call the file that does not send and retransmit application programming interfaces, obtain user number and breakpoint listed files, after communicating by letter with the recipient, consulting success, continue to transmit.
3, according to the end-to-end breaker point continuous transmission method based on calling control of claim 1, it is characterized in that described dynamic link library also comprises: network file search for application interface; The described flow process that resends also comprises, thinks continuous transmitting file if the recipient reaches the standard grade, the recipient will check the Download History daily record, automatically consult by calling out control, call network file search for application interface simultaneously and search the information point that can continue biography, continue to send.
4, according to claim 1 or 2 or 3 based on the end-to-end breaker point continuous transmission method of calling out control, it is characterized in that, described dynamic link library, also comprise: trust network lands the notification application interface, described transmission flow also comprises: described transmit leg and recipient call trust network and land the notification application interface, be provided at the information that trust network lands and the agreement of trust network, comprise H.323 and SIP.
5, according to claim 1 or 2 or 3 based on the end-to-end breaker point continuous transmission method of calling out control, it is characterized in that, described monitoring main thread, also comprise the information type that obtains described recipient (fileinfo, send file data, send new file, resend file), and handle this information type.
6, according to claim 1 or 2 or 3 based on the end-to-end breaker point continuous transmission method of calling out control, it is characterized in that described transmit leg and the work of described recipient's full duplex can be used as the transmit leg and/or the recipient of another or several transport process.
CN2006100259933A 2006-04-24 2006-04-24 Call control based terminal-to-terminal breakpoint transmission method Expired - Fee Related CN101064910B (en)

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