CN101877604B - Method and system for transmitting files - Google Patents
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- CN101877604B CN101877604B CN201010209982.7A CN201010209982A CN101877604B CN 101877604 B CN101877604 B CN 101877604B CN 201010209982 A CN201010209982 A CN 201010209982A CN 101877604 B CN101877604 B CN 101877604B
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Abstract
The invention discloses a method for transmitting files, which comprises the following steps: a first mobile terminal sends a split file to a second mobile terminal and the file is cached in the first mobile terminal; the second mobile terminal splices and caches the received file and records a receiving progress; and when the receiving condition is abnormal, after the first mobile terminal receives the request for continuingly transmitting the file sent by the second mobile terminal, the first mobile terminal sends the file to be continuingly transmitted to the second mobile terminal. The invention also provides a file transmitting system. The success rate of transmitting large files by bluetooth is improved according to the technical scheme of the invention.
Description
Technical field
The present invention relates to the file transfer technology in mobile terminal, particularly relate to a kind of method and system of transfer files.
Background technology
Bluetooth is a kind of radiotechnics of support equipment short haul connection, can at mobile phone, personal digital assistant (PDA, Personal Digital Assistant), carry out wireless messages exchange between the plurality of devices such as wireless headset, notebook computer, described short distance is generally within 10 meters.Utilize Bluetooth technology effectively can simplify communication between mobile terminal, also successfully can simplify the communication between mobile terminal and the Internet, thus make transfer of data efficient more rapidly.Based on the plurality of advantages of Bluetooth technology, bluetooth has been the critical function in current mobile terminal, and people have more and more used this function to communicate.What require quality of the life along with people improves constantly, and more and more uses the large files that the committed memories such as audio file, game and high pixel picture are larger in daily life, utilizes the situation of Bluetooth transmission large files also more and more general.
In prior art, be utilize the bluetooth protocol repertory of mobile terminal to realize the transmission of file.Fig. 1 is the structural representation realizing Bluetooth transmission file in prior art, as shown in Figure 1, logical link control and adaptation protocol (L2CAP, Logical Link Control and Adaptation Protocal) upper layer data between mobile terminal is transferred to asynchronous connection (ACL by layer, Asynchronous Connetion Less), ACL is connected by the link set up, data are sent to the bottom of mobile terminal with the form of least unit packet, realize the transmission of file.The defect of this method is: in document transmission process, once there is file transfer failure, just can not continue transfer files on the original basis.When transmitting large files, two kinds of reasons can be there are and make large files bust this: the first is because large files is directly sent to host controller interface (HCI by bluetooth service end, Host Control Interface), make the load of HCI link excessive, thus cause the failure of transmission large files; The second is because the memory space of mobile terminal Default Value is smaller, and because the low memory of bluetooth client in large files transmitting procedure, large files or HCI link cannot be received in transmitting procedure due to fortuitous events such as mobile terminal electricity are not enough at all, make to lose connection between bluetooth, thus cause large files bust this.
Summary of the invention
In view of this, main purpose of the present invention is the method and system providing a kind of transfer files, can improve the success rate utilizing Bluetooth transmission large files.
For achieving the above object, technical scheme of the present invention is achieved in that
The present invention discloses a kind of method of transfer files, comprising:
File after segmentation is sent to the second mobile terminal by the first mobile terminal, and is buffered in the first mobile terminal;
Second mobile terminal carries out splicing and buffer memory after receiving described divided file, record reception progress;
When accepting state occurs abnormal, the first mobile terminal receive that the second mobile terminal sends resume file request after, send to the second mobile terminal by needing the file resumed.
In said method, described when accepting state occurs abnormal, the method also comprises:
The file of own cache is saved in mobile memory card by the second mobile terminal.
In said method, the file of own cache is saved in mobile memory card and is specially by described second mobile terminal:
When the bluetooth Client Model determination accepting state in the second mobile terminal occur abnormal after, send the notification message that carries document breaking point position and file attribute to resuming administration module in the second mobile terminal; The described administration module that resumes will be buffered in the file spliced in the memory of bluetooth Client Model, is saved in the mobile memory card of the second mobile terminal, and empties memory.
In said method, the method also comprises:
When accepting state does not occur abnormal, after the second mobile terminal receives All Files, the complete message of transmission and reception gives the first mobile terminal.
In said method, after described second mobile terminal receives All Files, the complete message of transmission and reception is specially to the first mobile terminal:
After the bluetooth Client Model of the second mobile terminal no longer receives file, the complete message of transmission and reception gives the bluetooth service module of the first mobile terminal; After bluetooth service module receives message, notify that the file after the segmentation of buffer memory and file attribute are removed by the segmentation transport module in the first mobile terminal.
In said method, the file after segmentation is sent to the second mobile terminal by described first mobile terminal, and is buffered in the first mobile terminal and is specially:
File to be sent is sent to the segmentation transport module of the first mobile terminal by the bluetooth service module of the first mobile terminal; The file division exceeding file division thresholding, according to the file division thresholding arranged, is become multiple file by segmentation transport module, the reference number of a document of the file after the file header of the file after segmentation comprises file attribute and distributes to segmentation; File after segmentation is sent to the bluetooth Client Model of the second mobile terminal, and by the file cache after segmentation to self memory, file attribute is cached in the file memory of self.
In said method, described second mobile terminal carries out splicing and buffer memory to the file received, and record reception progress is specially:
The bluetooth Client Model of the second mobile terminal receives the file of the segmentation transport module transmission of the first mobile terminal, according to the file attribute in the file header of described file and reference number of a document, the file received is spliced, by spliced file cache to self memory; The quantity of documents received, after splicing file, is recorded in the reception data buffer of self by bluetooth Client Model.
In said method, described first mobile terminal receive that the second mobile terminal sends resume file request after, send to the second mobile terminal to be specially by needing the file that resumes:
The resuming administration module and will resume file request and send to the segmentation transport module of the first mobile terminal of second mobile terminal; Described segmentation transport module, according to resuming the file attribute and breakpoint location that carry in file request, finds the file needing to resume, the file found is sent to the bluetooth Client Model of the second mobile terminal.
The present invention also provides a kind of system of transfer files, comprising: the first mobile terminal, the second mobile terminal; Wherein,
First mobile terminal, for sending to the second mobile terminal by the file after segmentation, and at local cache; Receive that the second mobile terminal sends resume file request after, send to the second mobile terminal by needing the file that resumes;
Second mobile terminal, for carrying out splicing to the file received and buffer memory, record reception progress; When accepting state occurs abnormal, send and resume file request to the first mobile terminal.
In said system, described first mobile terminal comprises further: bluetooth service module, segmentation transport module; Wherein,
Bluetooth service module, for sending to segmentation transport module by file to be sent;
Segmentation transport module, for the file division thresholding according to setting, the file division exceeding file division thresholding is become multiple file, and give the numbering of the file allocation after segmentation, file after segmentation is sent to the second mobile terminal, and by the file cache after segmentation to self memory, file attribute is cached in the file memory of self; When receive that the second mobile terminal sends resume file request after, according to resuming the file attribute that carries in file request and breakpoint location finds the file needing to resume, the file found is sent to the second mobile terminal.
In said system, described second mobile terminal comprises further: bluetooth Client Model, resume administration module; Wherein,
Bluetooth Client Model, for receiving the file that segmentation transport module sends, the file attribute carried in the file header according to described file and reference number of a document, splice the file received, by spliced file cache to self memory; After file is spliced, the quantity of documents received is recorded in and receives in data buffer; Determining that accepting state occurs extremely, sending a notification message to resuming administration module;
Resuming administration module, for preserving being buffered in the file copy spliced in the memory of bluetooth Client Model in the mobile memory card of the second mobile terminal, and emptying memory; File request will be resumed and send to segmentation transport module.
The method and system of transfer files provided by the invention, multiple part is become to transmit the file division of transmission, the load of link between bluetooth is effectively alleviated in unit interval, avoid the file transfer failure because link load between bluetooth equipment is excessive and memory space inadequate causes, improve the success rate of large files transmission.In addition, the present invention adopts when accepting state occurs abnormal and resumes technology, overcome the defect needing again to transmit whole file because of Transmission, the file part to losing only is needed again to transmit, save the time of repetition transfer files, effectively improve the efficiency of file transfer.
Accompanying drawing explanation
Fig. 1 is the structural representation realizing Bluetooth transmission file in prior art;
Fig. 2 is the schematic flow sheet that the present invention realizes the method for transfer files;
Fig. 3 is the structural representation that the present invention realizes the system of transfer files.
Embodiment
Basic thought of the present invention is: the file after segmentation is sent to the second mobile terminal by the first mobile terminal, and is buffered in the first mobile terminal; Second mobile terminal carries out splicing and buffer memory to the file received, record reception progress; When accepting state occurs abnormal, the first mobile terminal receive that the second mobile terminal sends resume file request after, send to the second mobile terminal by needing the file resumed.
Below by drawings and the specific embodiments, the present invention is described in further detail again.
The invention provides a kind of method of transfer files, Fig. 2 is the schematic flow sheet that the present invention realizes the method for transfer files, and as shown in Figure 2, the method comprises the following steps:
Step 201, file to be sent is split by the first mobile terminal, and the file after segmentation is sent to the second mobile terminal and is buffered in the first mobile terminal;
Concrete, file to be sent is sent to the segmentation transport module of the first mobile terminal by the bluetooth service module of the first mobile terminal; Segmentation transport module is according to the file division thresholding pre-set, judge whether the size of the file that bluetooth service module sends exceedes file division thresholding, if exceeded, then the file division received is become multiple file, and according to the position of the file after each segmentation in original file to be sent, give the file allocation reference number of a document after segmentation; File after segmentation is made up of file header and file data bag, carries the reference number of a document and file attribute that distribute in file header, and this file attribute kit draws together the size, file type etc. of data in file; File after segmentation is sent to successively the bluetooth Client Model of the second mobile terminal according to reference number of a document, the size of the file after segmentation can not exceed segmentation threshold;
In said process, described the file division received to be specially: according to file division thresholding, first the file received is divided into two parts, the size of a part of file is equally large with file separator thresholding; If the size of another part file is still greater than file division thresholding, just it is divided into two parts again, the size of part file is equally large with file division thresholding, the like, until the file size after divided is less than or equal to file division thresholding;
Wherein, file division thresholding arranges according to the memory space of the first mobile terminal and the successful experience of bluetooth file transfer, and in actual applications, file division thresholding is set to 20M usually; If file size to be sent does not exceed file division thresholding, then directly send to the bluetooth Client Model of the second mobile terminal; File after segmentation and file attribute are carried out buffer memory by segmentation transport module, and in the file cache after segmentation to self memory, file attribute is cached in the file buffer of segmentation transport module.
Step 202, the second mobile terminal carries out splicing and buffer memory to the file received, record reception progress;
Concrete, the bluetooth Client Model of the second mobile terminal receives the file of the first mobile terminal segmentation transport module transmission, if do not receive second file again after receiving first file in setting cycle, then think that received file is the file not needing to split, directly perform step 206; Here, described setting cycle can be arranged in bluetooth Client Model according to the transmission speed of file between mobile terminal; If have received file again after receiving first file in setting cycle, illustrate that the file received is the file after segmentation, that is: a part for former file to be sent, then the file that the segmentation transport module that the bluetooth Client Model of the second mobile terminal receives the first mobile terminal successively sends; Because file to be sent can be multiple, and file to be sent can be divided into multiple file, so carry the file type in file attribute in file header according to received file, judge the file to be sent belonging to file received, according to the reference number of a document carried in file header, the file after the segmentation belonging to same file to be sent is spliced, by spliced file cache to self memory; According to the size of the file data in the file attribute carried in the file header of the file received, bluetooth Client Model can judge whether file receives at every turn, once determine to receive, bluetooth Client Model just splices file, is recorded in by the quantity of documents received in the reception data buffer of self to file after splicing;
In actual applications, Bluetooth receptions data are utilized to there will be exception, if when the ACL passage between the bluetooth Client Model of the bluetooth service module of the first mobile terminal and the second mobile terminal disconnects, or second mobile terminal application layer eject report an error window time, bluetooth Client Model determination accepting state occurs abnormal, performs step 203; If the ACL passage of the bluetooth service intermodule of the bluetooth Client Model of the second mobile terminal and the first mobile terminal does not disconnect, and the application layer of the second mobile terminal does not eject the window that reports an error, then there is not exception in the bluetooth Client Model determination accepting state of the second mobile terminal, file can be received smoothly, perform step 206.
Step 203, when accepting state occurs abnormal, the file of own cache is saved in mobile memory card by the second mobile terminal;
Concrete, when the bluetooth Client Model determination accepting state in the second mobile terminal occurs extremely, bluetooth Client Model need send a notification message to resuming administration module in the second mobile terminal, carry document breaking point position and file attribute in message, this breakpoint location is that bluetooth Client Model obtains according to being recorded in the quantity of documents received in data buffer; After resuming the notified message of administration module, receive in the memory being buffered in bluetooth Client Model and the file spliced, copied in the mobile memory card of the second mobile terminal and preserve, and empty memory; Here, by memory clear-up, be that the bluetooth Client Model of guarantee second mobile terminal can have living space and continues to receive and cache file.
Step 204, the second mobile terminal sends to the first mobile terminal and resumes file request;
Concrete, resuming administration module and will resuming file request and send to the segmentation transport module of the first mobile terminal of the second mobile terminal, resumes in file request and carries documentary breakpoint location.
Step 205, the first mobile terminal sends to the second mobile terminal by needing the file resumed, and performs step 202;
Concrete, after the segmentation transport module of the first mobile terminal receives and resumes file request, the file type of the file needing to resume is determined according to its file attribute carried, the file needing to resume is determined according to its breakpoint location carried, because need the file resumed to be the file splitting row cache of going forward side by side in step 201, so the segmentation transport module of the first mobile terminal directly can find the file needing to resume, and send to the bluetooth Client Model of the second mobile terminal, then perform step 202.
Step 206, when accepting state does not occur abnormal, after the second mobile terminal receives All Files, the complete message of transmission and reception gives the first mobile terminal;
Concrete, when no longer receiving file, all files that the segmentation transport module that bluetooth Client Model has received the first mobile terminal sends are described, the complete message of bluetooth Client Model transmission and reception gives the bluetooth service module of the first mobile terminal, and notice bluetooth service module file receives; After bluetooth service module receives message, notify that the file after the segmentation of buffer memory and file attribute are removed by the segmentation transport module of the first mobile terminal.
For realizing said method, the present invention also provides a kind of system of transfer files, and Fig. 3 is the structural representation that the present invention realizes the system of transfer files, and as shown in Figure 3, this system comprises: the first mobile terminal 31, second mobile terminal 32; Wherein,
First mobile terminal 31, for sending to the second mobile terminal 32 by the file after segmentation, and at local cache; Receive that the second mobile terminal 32 sends resume file request after, send to the second mobile terminal 32 by needing the file that resumes;
Second mobile terminal 32, for carrying out splicing to the file received and buffer memory, record reception progress; When accepting state occurs abnormal, send and resume file request to the first mobile terminal 31;
Second mobile terminal 32, is further used for the file of own cache to be saved in mobile memory card; When accepting state does not occur abnormal, after the second mobile terminal 32 receives All Files, the complete message of transmission and reception gives the first mobile terminal 31.
First mobile terminal 31 comprises further: bluetooth service module 311, segmentation transport module 312; Wherein,
Bluetooth service module 311, for sending to segmentation transport module 312 by file to be sent; When after the complete message receiving the second mobile terminal 32 transmission, the file after the segmentation of buffer memory and file attribute are removed by notice segmentation transport module 312;
Segmentation transport module 312, for the file division thresholding according to setting, the file division exceeding file division thresholding is become multiple file, and give the numbering of the file allocation after segmentation, file after segmentation is sent to the second mobile terminal 32, and by the file cache after segmentation to self memory, file attribute is cached in the file memory of self; When receive that the second mobile terminal 32 sends resume file request after, according to resuming the file attribute that carries in file request and breakpoint location finds the file needing to resume, the file found is sent to the second mobile terminal 32; Or, when after the notice receiving bluetooth service module 311 transmission, remove the file after the segmentation of own cache and file attribute.
Second mobile terminal comprises further: bluetooth Client Model 321, resume administration module 322; Wherein,
Bluetooth Client Model 321, for receiving the file that segmentation transport module 312 sends, carrying file attribute and reference number of a document, splicing the file received, by spliced file cache to self memory in the file header according to described file; After file is spliced, the quantity of documents received is recorded in the reception data buffer of self; Determine that accepting state occurs extremely, sending a notification message to resuming administration module 322, in notification message, carrying documentary breakpoint location; Or after no longer receiving file, the complete message of transmission and reception is to bluetooth service module 311;
Resume administration module 322, for by spliced in the memory being buffered in bluetooth Client Model 321 file copy preserve in the mobile memory card of the second mobile terminal 32, and empty memory; File request will be resumed and send to segmentation transport module 312.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention, and all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method for transfer files, is characterized in that, the method comprises:
File after segmentation is sent to the second mobile terminal by the first mobile terminal, and is buffered in the first mobile terminal;
Second mobile terminal carries out splicing and buffer memory after receiving described divided file, record reception progress;
When accepting state occurs abnormal, the first mobile terminal receive that the second mobile terminal sends resume file request after, send to the second mobile terminal by needing the file resumed; Wherein,
After what described first mobile terminal received that the second mobile terminal sends resume file request, the file that resumes will be needed to send to the second mobile terminal, be specially:
The resuming administration module and will resume file request and send to the segmentation transport module of the first mobile terminal of second mobile terminal, described resuming in file request carries document breaking point position and file attribute, described document breaking point position and file attribute be bluetooth Client Model determination accepting state in the second mobile terminal occur abnormal after, resume administration module described in sending to; Described segmentation transport module determines the file type of the file needing to resume according to resuming the file attribute carried in file request, according to the file resuming the breakpoint location carried in file request and determine to need to resume, and the file found is sent to the bluetooth Client Model of the second mobile terminal.
2. method according to claim 1, is characterized in that, described when accepting state occurs abnormal, the method also comprises:
The file of own cache is saved in mobile memory card by the second mobile terminal.
3. method according to claim 2, is characterized in that, the file of own cache is saved in mobile memory card and is specially by described second mobile terminal:
When the bluetooth Client Model determination accepting state in the second mobile terminal occur abnormal after, send the notification message that carries document breaking point position and file attribute to resuming administration module in the second mobile terminal; The described administration module that resumes will be buffered in the file spliced in the memory of bluetooth Client Model, is saved in the mobile memory card of the second mobile terminal, and empties memory.
4. method according to claim 1, is characterized in that, the method also comprises:
When accepting state does not occur abnormal, after the second mobile terminal receives All Files, the complete message of transmission and reception gives the first mobile terminal.
5. method according to claim 4, is characterized in that, after described second mobile terminal receives All Files, the complete message of transmission and reception is specially to the first mobile terminal:
After the bluetooth Client Model of the second mobile terminal no longer receives file, the complete message of transmission and reception gives the bluetooth service module of the first mobile terminal; After bluetooth service module receives message, notify that the file after the segmentation of buffer memory and file attribute are removed by the segmentation transport module in the first mobile terminal.
6. method according to claim 1, is characterized in that, the file after segmentation is sent to the second mobile terminal by described first mobile terminal, and is buffered in the first mobile terminal and is specially:
File to be sent is sent to the segmentation transport module of the first mobile terminal by the bluetooth service module of the first mobile terminal; The file division exceeding file division thresholding, according to the file division thresholding arranged, is become multiple file by segmentation transport module, the reference number of a document of the file after the file header of the file after segmentation comprises file attribute and distributes to segmentation; File after segmentation is sent to the bluetooth Client Model of the second mobile terminal, and by the file cache after segmentation to self memory, file attribute is cached in the file memory of self.
7. method according to claim 1, is characterized in that, described second mobile terminal carries out splicing and buffer memory to the file received, and record reception progress is specially:
The bluetooth Client Model of the second mobile terminal receives the file of the segmentation transport module transmission of the first mobile terminal, according to the file attribute in the file header of described file and reference number of a document, the file received is spliced, by spliced file cache to self memory; The quantity of documents received, after splicing file, is recorded in the reception data buffer of self by bluetooth Client Model.
8. a system for transfer files, is characterized in that, this system comprises: the first mobile terminal, the second mobile terminal; Wherein,
First mobile terminal, for sending to the second mobile terminal by the file after segmentation, and at local cache; Receive that the second mobile terminal sends resume file request after, send to the second mobile terminal by needing the file that resumes;
Second mobile terminal, for carrying out splicing to the file received and buffer memory, record reception progress; When accepting state occurs abnormal, send and resume file request to the first mobile terminal; Wherein,
Described first mobile terminal comprises: segmentation transport module, the file type that the file attribute carried in file request determines the file needing to resume is resumed for basis, according to the file resuming the breakpoint location carried in file request and determine to need to resume, and the file found is sent to the bluetooth Client Model of the second mobile terminal;
Described second mobile terminal comprises: resume administration module, for will file request resumed send to the segmentation transport module of the first mobile terminal, described resuming in file request carries document breaking point position and file attribute, described document breaking point position and file attribute be described bluetooth Client Model determination accepting state to occur abnormal after, resume administration module described in sending to.
9. system according to claim 8, is characterized in that, described first mobile terminal comprises further:
Bluetooth service module, for sending to segmentation transport module by file to be sent;
Described segmentation transport module, also for the file division thresholding according to setting, the file division exceeding file division thresholding is become multiple file, and give the numbering of the file allocation after segmentation, file after segmentation is sent to the second mobile terminal, and by the file cache after segmentation to self memory, file attribute is cached in the file memory of self.
10. system according to claim 8 or claim 9, it is characterized in that, described second mobile terminal comprises further:
Bluetooth Client Model, for receiving the file that segmentation transport module sends, the file attribute carried in the file header according to described file and reference number of a document, splice the file received, by spliced file cache to self memory; After file is spliced, the quantity of documents received is recorded in and receives in data buffer; Determining that accepting state occurs extremely, sending a notification message to resuming administration module;
Describedly resuming administration module, also for preserving being buffered in the file copy spliced in the memory of bluetooth Client Model in the mobile memory card of the second mobile terminal, and emptying memory.
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