CN105743978A - Data transmitting method - Google Patents
Data transmitting method Download PDFInfo
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- CN105743978A CN105743978A CN201610063530.XA CN201610063530A CN105743978A CN 105743978 A CN105743978 A CN 105743978A CN 201610063530 A CN201610063530 A CN 201610063530A CN 105743978 A CN105743978 A CN 105743978A
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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
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/18—File system types
- G06F16/1805—Append-only file systems, e.g. using logs or journals to store data
- G06F16/1815—Journaling file systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/762—Media network packet handling at the source
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- Multimedia (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Data Mining & Analysis (AREA)
- Databases & Information Systems (AREA)
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Information Transfer Between Computers (AREA)
Abstract
The invention relates to the field of communication and discloses a data transmitting method. The method comprises the following steps: S1, splitting a data file into multiple data blocks; S2, encapsulating the data blocks into data packets in sequence; S3, sending the data packets to a receiving end in sequence by a sending end; S4, if all data packets are sent successfully, finishing the transmission of the data file, otherwise, generating corresponding records in an error log file for the data packets which are sent unsuccessfully, and executing S5; S5, according to the records in the error log file, obtaining the data packets which are sent unsuccessfully and sending the data packets to the receiving end; and S6, if the data packets are sent successfully, deleting the corresponding records in the error log file and returning to S5 till no records exist in the error log file. According to the data transmitting method disclosed by the invention, after a DICOM (Digital Imaging and Communications in Medicine) image is interrupted in a transmission process, the part which is not transmitted is transmitted continuously and automatically; the transmission time and the resource are saved, and simultaneously the load of a server at the sending end is reduced.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of data transmission method.
Background technology
Data file relies on communication network and is transmitted, once occur network to interrupt the situation of even device powers down, so the transmission of data file is also interrupted therewith, after network recovery connects, it is typically only capable to initiate the transmission again to whole data file, both extend the transmission time, waste again Internet resources.
There is also data breakpoint in prior art and resume technology, it is generally adopted when file Transmission, and record has transmitted data deviation post hereof；Follow-up initiation to this document when resuming, then by deviation post hereof described in obtaining, and start to continue to transmit described data file from described deviation post.But the reliability of this breaker point continuous transmission method of the prior art is not high, once data file is slightly modified, or when there is Transmission, this data file is destroyed, then whole file obtained after breakpoint transmission is invalid, there is great potential safety hazard.
Sequence data in particular for DICOM (DigitalImagingandCommunicationsinMedicine) image composition, namely in the transmitting procedure of digital imaging and communications in medicine sequence data, ensure that the safety of sequence data is most important, prior art is absent from a kind of breaker point continuous transmission method saving transmission time and resource, and ensure that the safety and reliability in data forward process, ensure the integrity of the data file resuming front and back.
Summary of the invention
For overcoming the deficiencies in the prior art, it is an object of the invention to: provide a kind of data transmission method so that DICOM image is had no progeny in occurring in transmitting procedure, automatically the part do not transmitted is continued transmission, save transmission time and resource, reduce the load of transmitting terminal server simultaneously.
In order to solve the technical problem in background technology, the invention provides a kind of data transmission method, comprise the following steps:
S1, data file segmentation is become multiple data block；
S2, each data block is packaged into packet successively；
S3, transmitting terminal deliver a packet to receiving terminal successively；
If all packets of S4 all send successfully, then complete the transmission of described data file, otherwise, for sending failed packet, error log file generates corresponding record, and performs S5；
S5, according to the record in described error log file, obtain and send failed packet, and send failed packet be sent to receiving terminal by described；
If the S6 failed packet of described transmission sends successfully, then corresponding record in deletion error journal file, otherwise returns S5, until not having record in described error log file.
Preferably, described packet includes filename length, filename, data block sequence number and data block, according to data block sequence in the data file, described data block sequence number is numbered.
Specifically, described data file is the DICOM image in DICOM sequence, and described packet also includes DICOM serial number length, DICOM serial number and total data block number.
Further, described S3 specifically includes: transmitting terminal transmits packets to receiving terminal, packet is resolved by described receiving terminal, verify successfully if described packet is resolved by receiving terminal, then by receiving terminal transmission feedback data packet to transmitting terminal, if described feedback data Packet analyzing is verified successfully by transmitting terminal, then described packet sends successfully.
Alternatively, described feedback data packet includes filename length, filename, total data block number and data block sequence number, when described packet sends after successfully, using described filename and data block sequence number as a record, is saved in successfully in journal file.
Further, if described transmitting data file process is interrupted, then travel through the record in described successful journal file, do not sent successful packet information, and in described error log file, generate corresponding record.
Specifically, the record in described error log file includes sending the filename in failed packet and data block sequence number.
Further, described S5 particularly as follows: according in described error log file record filename, position the disk path at corresponding data file place, according to the data block sequence number of record in described error log file, location sends the failed corresponding data block of packet position in described data file, and then extract described data block, and the data block of extraction is packaged into packet.
Further, described data file segmentation, particularly as follows: data block size is configured in configuration file, is become the data block that size is identical according to configuration result by described S1.
Specifically, in described S4, if having at least one to send failed packet, then newly-built described error log file, in described S6, until described error log file does not have record, then delete described error log file.
Adopt technique scheme, there is advantages that after 1. data file segmentation being become multiple data block, it is possible to be transmitted by multiple servers, improve data transmission efficiency；2. it is transmitted in units of the data block of segmentation, even if original is destroyed when breaking in the transmission, nor affects on the integrity resuming rear file；3. the data block sent and additional information composition packet, wherein the filename in additional information can position the store path of data file, and data block sequence number can position this data block position in whole data file；4. the additional information not sending successful packet be recorded in error log file, when carrying out breakpoint transmission, by searching error log, get final product positioning searching to not sending successful data block, and resend.In sum, the data transmission method of the present invention makes DICOM image have no progeny in occurring in transmitting procedure, automatically the part do not transmitted is continued transmission, has saved transmission time and resource, reduced the load of transmitting terminal server simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly that technical scheme, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the data segmentation schematic diagram of the data transmission method that the embodiment of the present invention provides；
Fig. 2 is the schematic diagram of the packet additional information that the embodiment of the present invention provides；
Fig. 3 is the flow chart of the data transmission method that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
Embodiment 1: Fig. 3 is the flow chart of the data transmission method that the embodiment of the present invention provides, it can be seen that the data transmission method that the present embodiment provides comprises the following steps:
S1, data file segmentation is become multiple data block；
S2, each data block is packaged into packet successively；
S3, transmitting terminal deliver a packet to receiving terminal successively；
If all packets of S4 all send successfully, then complete the transmission of described data file, otherwise, for sending failed packet, error log file generates corresponding record, and performs S5；
S5, according to the record in described error log file, obtain and send failed packet, and send failed packet be sent to receiving terminal by described；
If the S6 failed packet of described transmission sends successfully, then corresponding record in deletion error journal file, otherwise returns S5, until not having record in described error log file.
Wherein, described S1 particularly as follows: configure data block size in configuration file, such as configuration result be data block be sized to 4kb, so, described data file is split from the head to the tail in units of 4kb, and according to the order of segmentation, the data block being divided into is numbered, it is data block sequence number.
In described S2, preferably, described packet is to be combined with corresponding additional information by data block, described additional information includes the data block sequence number of the filename length of described data block place data file, filename and described data block, namely described packet information forms according to following order composition: filename length, filename, data block sequence number and data block, all of packet is to carry out when sending packet resolving verifying work with identical order arrangement, but the present invention is not limited to this above-mentioned one and puts in order.
nullFig. 1 is the data segmentation schematic diagram of the data transmission method that the embodiment of the present invention provides，As can be seen from Figure，Described data file is the DICOM image in DICOM sequence，Described packet also includes DICOM serial number length、DICOM serial number and total data block number，Be can be seen that by Fig. 1，Described packet data block and packet accessory information，Putting in order as DICOM serial number length of described packet composition information、DICOM serial number、Filename length、Filename、Total data block number、Data block sequence number and data block，Fig. 2 is the schematic diagram of the packet additional information that the embodiment of the present invention provides，Be can be seen that by Fig. 2，DICOM serial number length、DICOM serial number、Filename length、Filename、Total data block number、Data block sequence number constitutes the additional information of described data block，Why increase the project of additional information，First it is to prevent the DICOM image data file that there is same file name in not homotactic DICOM sequence，Next to that in order to improve accuracy and the precision carrying out resolving verification when sending packet.
nullIn the present embodiment，Can adopt multiple server that described packet is transmitted，The data block total number order such as split is 300，Then first transmission server is responsible for sending data block sequence number is the packet of 0-99，It is the packet of 100-199 that second transmission server is responsible for sending data block sequence number，It is the packet of 200-299 that 3rd transmission server is responsible for sending data block sequence number，Obviously，Such transmitting efficiency improves twice，The form that the server number and its division of labor that send packet are sent packet by the present embodiment is not especially limited，The process that server often sends a packet is as follows: transmitting terminal transmits packets to receiving terminal，Packet is resolved by described receiving terminal，If described packet is resolved and verifies successfully by receiving terminal，Then by receiving terminal transmission feedback data packet to transmitting terminal，If described feedback data Packet analyzing is verified successfully by transmitting terminal，Then described packet sends successfully.It is therefore seen that, confirm whether a packet sends successfully, need to verify through twice parsing: be that transmitting terminal sends packet to receiving terminal for the first time, carried out resolving verification to described packet by receiving terminal, described receiving terminal is according to analysis protocol, if described packet is absent from gaps and omissions, dislocation, form are not inconsistent or during other abnormal conditions, then described packet is resolved and verifies successfully by described receiving terminal；Resolve in first time and verify after successfully, feedback data packet is returned to transmitting terminal by described receiving terminal, the information of described feedback data packet is the corresponding additional information of described data block and combines, by transmitting terminal, the feedback data packet returned is carried out second time and resolve verification, also according to corresponding analysis protocol, if described feedback data packet is absent from gaps and omissions, dislocation, form are not inconsistent or during other abnormal conditions, then described feedback data Packet analyzing is verified successfully by described transmitting terminal.Verify through twice parsing, and check results be all successfully time, then judge that described packet sends successfully, and generate a record in success journal file, described successful journal file is with described data file one to one, therefore, described successful journal file can be named with " DICOM serial number+filename ", the information of each record at least includes the filename in the corresponding additional information of described data block, total data block number and two information of data block sequence number, if additional information all being generated described record, the equally possible technical problem realizing solving the present invention, the information of record is not construed as limiting by the present embodiment except filename and two information of data block sequence number.
As long as there being the verification of any one parsing unsuccessful, then judge that described packet does not send successfully, to be recorded as merit journal file the same with above-mentioned, newly-built error log file, and in described error log file, generate corresponding record, the information of described record at least includes filename and two information of data block sequence number of not sending in the corresponding additional information of successful packet, described error log file is also with described data file one to one, therefore, described error log file can be named with " DICOM serial number+filename+ERR ", distinguish with described successful journal file.
In the present embodiment 1, when not there are network interruption or other data-transmission interruptions, judge whether that the corresponding packet of all of data block all sends successfully foundation and has two: one to be travel through the record in described successful journal file, with reference to total data block number, whether the data block sequence number of inspection record has gaps and omissions, if there is gaps and omissions, then illustrate that packet corresponding to the data block sequence number of gaps and omissions be not for send successfully；Two are to look for error log file, check in error log file whether there is record, and the data packet that the data block sequence number of record is corresponding is successful for not sending.The first basis for estimation preferred in the present embodiment, otherwise, namely judge that all packets all send successfully, then the transmission of data blocks of described data file is complete, data block information in the packet of end of transmission is extracted successively according to the order of data block sequence number and combined, it is reduced into the complete data file after transmission, completes the transmission of described data file.
nullSuccessful packet is not sent if transmitting procedure exists，Then according to the record in error log file，Record corresponding packet successively to resend each: the disk fullpath at the data file place at the data block place that described packet comprises can be navigated to according to the filename in record，Further according to data block sequence number，And the configuration result of configuration file，Navigate to described data block position in whole data file，In the present embodiment，Described data block sequence number is with 0 for beginning，If inquiring about described data block sequence number is n，Then positioning corresponding data block position in described data file is that 4kb*n is initial，Extracting length is the data block of 4kb，And by this data block according to the method described above，By itself and additional information composition packet，And send it to receiving terminal，Also pass through twice parsing verification，Judge that described packet sends after successfully，Delete its corresponding record in error log file，So circulation，Until error log file is absent from record，Illustrate that all of packet is all successfully transmitted，Then delete described error log file，Data block information in the packet of end of transmission is extracted successively according to the order of data block sequence number and combined，It is reduced into the complete data file after transmission，Complete the transmission of described data file.
Embodiment 2: as different from Example 1, the present embodiment there occurs the situation of network interruption or data transmission set power down, if it occur that before data-transmission interruptions, not newly-built error log file, then traveling through successfully record in journal file, with reference to total data block number, whether the data block sequence number of inspection record has gaps and omissions, the data block sequence number of gaps and omissions and filename are generated record, and record is saved in newly-built error log file；If before generation data-transmission interruptions, newly-built error log file, and there is record, then travel through successfully record in journal file, with reference to total data block number, whether the data block sequence number of inspection record has gaps and omissions, by gaps and omissions and in error log file non-existent data block sequence number and filename generate record, and it is saved in described error log file, obviously, can also pass through the data block of gaps and omissions and filename in success journal file are generated record, be saved in described error log file with the form covered.
nullAfter obtaining error log file，According to the record in error log file，Record corresponding packet successively to resend each: the disk fullpath at the data file place at the data block place that described packet comprises can be navigated to according to the filename in record，Further according to data block sequence number，And the configuration result of configuration file，Navigate to described data block position in whole data file，In the present embodiment，Described data block sequence number is with 0 for beginning，If inquiring about described data block sequence number is n，Then positioning corresponding data block position in described data file is that 4kb*n is initial，Extracting length is the data block of 4kb，And by this data block according to the method described above，By itself and additional information composition packet，And send it to receiving terminal，Also pass through twice parsing verification，Judge that described packet sends after successfully，Delete its corresponding record in error log file，So circulation，Until error log file is absent from record，Illustrate that all of packet is all successfully transmitted，Then delete described error log file，Data block information in the packet of end of transmission is extracted successively according to the order of data block sequence number and combined，It is reduced into the complete data file after transmission，Complete the transmission of described data file.
Embodiment 3: with embodiment 1 and 2 the difference is that, in the present embodiment, adopt single-shot send server that the packet being divided into is sequentially carried out transmission, namely according to the order that the data block sequence number of packet is ascending carry out order send.When there is the situation of data-transmission interruptions, travel through the record in described successful journal file, search the maximum of respective data blocks sequence number in record, if the maximum of described data block sequence number is k, then after resume data transmission function, it is that the corresponding data block of k+1 proceeds by and resumes by data block sequence number, this breakpoint transmission mode is without checking the record of error log file, position and do not send successful data block accordingly, the method feature that the data block resumed is resend in the present embodiment is identical with embodiment 1 and 2, does not repeat them here.
The data transmission method of the present invention makes DICOM image have no progeny in occurring in transmitting procedure, automatically the part do not transmitted is continued transmission, has saved transmission time and resource, reduced the load of transmitting terminal server simultaneously.
The above disclosed several preferred embodiments being only the present invention, certainly can not limit the interest field of the present invention, the equivalent variations therefore made according to the claims in the present invention with this, still belong to the scope that the present invention contains.
Claims (10)
1. a data transmission method, it is characterised in that comprise the following steps:
S1, data file segmentation is become multiple data block；
S2, each data block is packaged into packet；
S3, transmitting terminal deliver a packet to receiving terminal；
If all packets of S4 all send successfully, then complete the transmission of described data file, otherwise, for sending failed packet, error log file generates corresponding record, and performs S5；
S5, according to the record in described error log file, obtain and send failed packet, and send failed packet be sent to receiving terminal by described；
If the S6 failed packet of described transmission sends successfully, then corresponding record in deletion error journal file, otherwise returns S5, until not having record in described error log file.
2. data transmission method according to claim 1, it is characterised in that described packet includes filename length, filename, data block sequence number and data block, is numbered described data block sequence number according to data block sequence in the data file.
3. data transmission method according to claim 2, it is characterised in that described data file is the DICOM image in DICOM sequence, described packet also includes DICOM file name, DICOM serial number length, DICOM serial number and total data block number.
4. data transmission method according to claim 2, it is characterized in that, described S3 specifically includes: transmitting terminal transmits packets to receiving terminal, packet is resolved by described receiving terminal, verify successfully if described packet is resolved by receiving terminal, then being sent feedback data packet to transmitting terminal by receiving terminal, if described feedback data Packet analyzing is verified successfully by transmitting terminal, then described packet sends successfully.
5. data transmission method according to claim 4, it is characterized in that, described feedback data packet includes filename length, filename, total data block number and data block sequence number, when described packet sends after successfully, using described filename and data block sequence number as a record, it is saved in successfully in journal file.
6. data transmission method according to claim 5, it is characterized in that, if described transmitting data file process is interrupted, then travel through the record in described successful journal file, do not sent successful packet information, and in described error log file, generated corresponding record.
7. data transmission method according to claim 2, it is characterised in that the record in described error log file includes sending the filename in failed packet and data block sequence number.
8. data transmission method according to claim 7, it is characterized in that, described S5 particularly as follows: according in described error log file record filename, position the disk path at corresponding data file place, according to the data block sequence number of record in described error log file, location sends the failed corresponding data block of packet position in described data file, and then extracts described data block, and the data block of extraction is packaged into packet.
9. the data transmission method according to any one in claim 1-8, it is characterised in that described data file segmentation, particularly as follows: data block size is configured in configuration file, is become the data block that size is identical according to configuration result by described S1.
10. data transmission method according to claim 1, it is characterised in that in described S4, if having at least one to send failed packet, then newly-built described error log file, in described S6, until described error log file does not have record, then delete described error log file.
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