CN101409727B - Document transmission method and apparatus - Google Patents
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- CN101409727B CN101409727B CN 200810178410 CN200810178410A CN101409727B CN 101409727 B CN101409727 B CN 101409727B CN 200810178410 CN200810178410 CN 200810178410 CN 200810178410 A CN200810178410 A CN 200810178410A CN 101409727 B CN101409727 B CN 101409727B
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Abstract
The invention discloses a file transmission method which is applied to train communication network. In the method, operational request information is sent to an opposite end device in a predetermined format. The operational request information comprises an operational code, a transmission mode and path information. When confirmation information which is returned by the opposite end device is received, the data message operation is implemented according to the operational request information. A file transmission device for the train communication network is also provided. According to the file transmission method, five functions of uploading files, downloading files, searching for files or catalogues, deleting files and viewing occupied space of disks can be realized. On the train communication network, systematic files, configuration files and application files can be transmitted to other intelligent devices just by one intelligent device. The file transmission method is beneficial to the maintenance of file systems of train equipment.
Description
Technical field
The present invention relates to network and communications technical field, be specifically related to a kind of document transmission method and device.
Background technology
TCN (TCN, Train Communication Network) is to be used for data file exchange between each operational management equipment on the train, adopts the distributed modular structure usually.Owing to be dedicated network, its transmission speed, transmittability, real-time all need meet the train operation requirement, have realized the technological leapfrogging of control from the centralized control to the distributed network.Based on the file transfer of TCN, the method that can use for reference has widely used TFTP and FTP (File TransferProtocol) based on TCP/IP.
TFTP of the prior art (TFTP, Trivial File Transfer Protocol) is based on the application on the UDP (UDP, User Datagram Protocol).When starting working, the client of TFTP and server exchange information, the client sends a read request or server is given in the request of writing.For read request, if this file can be read by this client, it is 1 packet that tftp server just returns a block number.TFTP client send again one comprise block number be 1 affirmation (ACK, Acknowledge).Continue to send block number be 2 packet to tftp server subsequently, and it is 2 ACK that TFTP returns block number.Repeating this process has transmitted up to this file.Writing under the situation of request, if this file can be write by this client, it is 0 ACK that tftp server then returns block number.This client is 1 to send 512 byte of file with block number just.It is 1 ACK that server then returns block number.It is simple that the advantage of TFTP is to realize.
Be directed to the train network management of TCN, also do not propose the concrete implementation method of file transfer at present, but file transfer is very important again, various system files, configuration file need transmit between the equipment ON TRAINS.If TFTP or File Transfer Protocol are indiscriminately imitated fully, be infeasible for train network.This is because TCN adopts is MVB (MVB; And adopt real-time protocol (RTP) (RTP Multifunction Vehicle Bus) and wired train bus (WTB, Wire TrainBus) bus; Real Time Protocol); And TFTP agreement, File Transfer Protocol are respectively UDP and the application of TCP that is based upon on the TCP/IP protocol suite, and therefore, TFTP agreement, File Transfer Protocol are not suitable for the train net.
In addition, though TFTP realizes that simply function is too simple, can only carry out uploading and downloading of file, can not satisfy the demand of train network management.For example on train network, need check the listed files on the remote equipment, so that select to want downloaded files.And FTP has rich functions, but realizes too complicated.
Summary of the invention
In view of this, the present invention provides a kind of document transmission method and device, can be implemented in the TCN file transfer between two equipment, satisfies the train network management expectancy.
A kind of document transmission method that the embodiment of the invention provides is used for TCN, comprising:
Give opposite equip. according to predetermined format transmit operation solicited message, said operation requests information comprises operation code, transmission mode and routing information;
After receiving the affirmation information that said opposite equip. returns, carry out the data message operation according to operation requests information.
The embodiment of the invention also provides a kind of file transfer means, is used for TCN, comprising:
The operation requests transmitting element is given opposite equip. according to predetermined format transmit operation solicited message, and said operation requests information comprises operation code, transmission mode and routing information;
The response message receiving element receives the response message that said opposite equip. returns;
The data manipulation unit after receiving the affirmation information that said opposite equip. returns, carries out the data message operation according to operation requests information.
In sum, in the technical scheme that the embodiment of the invention provides, a kind of document transmission method and the device that provide based on TCN; Can provide in the vehicle or the file transfer between the equipment between vehicle, the present invention is based on the application on the Real-time Transport Protocol, is being used for the RTP of TCN (Real Time Protocol; Real-time protocol (RTP)) on the basis; A smart machine after the device responds request, begins file transfer to another equipment sending function request.Through definition with realize that file uploads, file is downloaded, inquiry file or catalogue, and deleted file is checked five kinds of functions of disk usage space, has realized in TCN the file transfer between two equipment.
The thought that method of the present invention has made full use of TFTP (TFTP, Trivial FileTransfer Protocol) realizes the function that file is uploaded/downloaded, and abundant file transfer order is provided again, and simple, read-write efficiency is high.Realized on TCN, just can be through a smart machine with system file, configuration file, application file are transferred on other each smart machines, help the maintenance of the file system on the train apparatus.
Description of drawings
The flow chart of uploading data file of Fig. 1 for providing in the embodiment of the invention;
Fig. 2 is the flow chart of the download data files that provides in the embodiment of the invention;
Fig. 3 is the finite state machine sketch map that embodiment of the invention succedaneum file upload is handled;
Fig. 4 is the finite state machine sketch map that embodiment of the invention operator file upload is handled;
A kind of file transfer means configuration diagram that Fig. 5 provides for the embodiment of the invention.
Embodiment
Characteristics and environment in view of TCN the present invention is directed to TCN and have proposed a kind of document transmission method based on TCN, and this method had both made full use of the thought of TFTP, and abundant file transmitting function is provided again.
The data transfer operation that the presents transmission method provides comprises data upload, and data are downloaded, tabulation display file or catalogue, and file delete is checked disk free space size.It is realized as follows:
In order to be integrated among the train network management TNM, to number definition of file transfer services function as follows at this:
The file upload function number is 100;
The file download function number is 101;
Tabulation display file or catalog function number are 102;
The deleted file function number is 103;
Check that disk free space magnitude function number is 105.
At first, message format is defined, embodiment of the invention file host-host protocol uses 5 types of messages:
Read request (RRQ): read request is used for download data files.
Write request (WRQ): write request, be used to upload data file.
Data (DATA): data message is used to transmit file content.
Acknowledgment (ACK): confirmation message is used to indicate transmission state.
Error (ERROR): the returned packet of makeing mistakes is used to indicate error of transmission.
The form of message with the explanation as follows:
(1) RRQ/WRQ message format
The form of RRQ and WRQ message (operation code opcode is respectively 1 and 2) is as implied above.Filename is the ASCII character character, finishes with 0.Mode representes the transmission mode of file, and character pattern (0) or binary mode (3) are arranged.
The DATA message format
Data are transmitted in data message, and its form as shown above.The operation code opcode of packet is 3, and it also includes a data block number and data.Data block number is since 1 coding, and each data block adds 1, and the recipient can confirm that this bag is new data or the data that received like this.Data field from 0 byte to 512 bytes.If data field is 512 bytes then it is not last bag, if less than 512 bytes then represent that this message is last message.
The ACK message format
The operation code opcode of ACK message is 4.Bale No. wherein is the Bale No. of the packet that will confirm.
The ERROR message format
The operation code opcode of ERROR message is 5, and its form is as implied above, and this bag can be confirmed by the bag of other any kind.The type of error code specify error.The value of error code is:
0 is undefined
1 File Open mistake
2 timers are provided with mistake
3 files are not opened
4 messages do not expected
The block number mistake of 5 transmissions
The allocated quota file is expired or surpassed to disk
Exist
There is not similar user
8 illegal file transfer operations
A kind of data transmission method that the embodiment of the invention provides is used for TCN, comprising:
Give opposite equip. according to predetermined format transmit operation solicited message, said operation requests information comprises operation code, transmission mode and routing information;
After receiving the affirmation information that said opposite equip. returns, carry out the data message operation according to operation requests information.For example carrying out data message uploads or downloads.
Embodiment one
In the present embodiment,, the transmission course of message is described based on the upload file process, with reference to Fig. 1, specific as follows:
Step S101, the operator sends one to the succedaneum and writes request WRQ message.
The operator plays the function that is similar to file transmitting to customer end, and the succedaneum plays the function that is similar to Ftp server.
Step S102, succedaneum judge whether filename and path be correct, and can system receive.If correct, answer the ACK message.If mistake is answered the ERROR message.
After step S103, operator receive the ACK message, begin to send the DATA message to the succedaneum.
Step S104, succedaneum receive the DATA message, write data file, and answer the ACK message, if make mistakes, answer the ERROR message.
Operator's repeating step S103, succedaneum's repeating step S104.Until sending, data finish.If the operator receives the ERROR message in the process in front, transmission course finishes.
The state machine of operator and succedaneum's end
The operating state of succedaneum's upload file processing module can be divided into three: Idle, Start, Run state.The upload file of Idle STA representation is handled and is not also begun.The Start STA representation enters into the state that file is uploaded, but does not also begin the transmission of data.The Run STA representation is carrying out upload file, and the succedaneum is receiving data.
The operating state of operator's upload file processing module can be divided into three: Idle, Start, Run state.The upload file of Idle STA representation is handled and is not also begun.The Start STA representation enters into the state that file is uploaded, but does not also begin the transmission of data.The Run STA representation is carrying out upload file, and the succedaneum is receiving data.
In the present embodiment.Being set to of timeout value: 2 seconds.
Embodiment two
In the present embodiment; FTP is used foregoing 5 types of message: read request Readrequest (RRQ); Write request Write request (WRQ), data message Data (DATA), confirmation message Acknowledgment (ACK) and the returned packet Error (ERROR) that makes mistakes.
Based on the file in download flow process, the transmission course of message is described below, specific as follows:
Step S201. operator sends a read request RRQ message to the succedaneum;
Step S202. succedaneum judges whether filename and path be correct, and whether file can be opened.If correct, begin to transmit the DATA message.If mistake is answered the ERROR message;
After step S203. operator receives the DATA message, judge, send next blocks of data of ACK message request to the succedaneum if not last message;
Step S204. succedaneum receives the ACK message, if file has not also transmitted, continues to answer the DATA message, if make mistakes, answers the ERROR message;
Operator's repeating step S203, succedaneum's repeating step S204; Until sending, data finish.If the operator receives the ERROR message in the process in front, transmission course finishes.
With reference to Fig. 3 and Fig. 4, shown in be respectively the state machine of operator and succedaneum end.
In the file download process, the succedaneum plays the function that is similar to the Ftp server end.
The operating state of succedaneum's upload file processing module can be divided into 2: Idle, Run state.Idle STA representation file in download is handled and is not also begun.The Run STA representation is carrying out file in download, and the succedaneum is sending data.
In the file download process, the operator plays the function that is similar to file transmitting to customer end.
The operating state of operator's file in download processing module can be divided into three: Idle, Start, Run state.Idle STA representation file in download is handled and is not also begun.The Start STA representation enters into the state that file is downloaded, but does not also begin the transmission of data.The Run STA representation is carrying out file in download, and the succedaneum is receiving data.
Embodiment three
The data transmission method that the embodiment of the invention provides is compared with previous embodiment, also comprises:
Inquiry file or catalogue, deleted file checks that these several functions of disk free space size are that the built-in function that calls the operating system on the smart machine is realized, different operating systems, its concrete implementation method is different.
(a) inquiry file or directory operation
Check the listed files of the assigned catalogue of the smart machine on the train network, attribute of file (being regular file or catalogue) and file size.Perhaps check the list of devices on this equipment.List of devices comprises physical serial interface, Flash memory device, distance host catalogue, and other equipment and driving.
The message related to calls organization definition is following:
Call_Get_Dir::RECORD
{
Dir_name_len UNSIGNED16;--be used to deposit "/" length of (referring to read list of devices) or directory name
Dir_name [256] UNSIGNED8;--be used for sending "/" (referring to read list of devices) or directory name
}
The structure of response message is following:
Reply_Get_Dir::RECORD
{
Flag UNSIGNED8;--what be used to identify answer is list of devices or listed files
Nr_files_or_drvs UNSIGNED16;--be used for storage equipment number or number of files
body?union
{
file_list?ARRAY[NM_MAX_FILE_NUM]of
{
File_state UNSIGNED8;--be used for the type of store files
File_size UNSIGNED32;--be used for the size of store files
File_name [32] UNSIGNED8;--be used for the store files name
}
dev_list?ARRAY[NM_MAX_FILE_NUM]of
{
Dev_num UNSIGNED16;--be used for storage equipment number;
Dev_name [32] UNSIGNED8;--be used for the storage equipment name
}
}
}
Flag wherein:
What deposit in the 0 expression File_Or_Dev_Object array is the driving number of implementor name and equipment.
What deposit in the 1 expression File_Or_Dev_Object array is the types value of filename and file thereof.
2 directory names of indicating to open are incorrect.
Flag is 1 o'clock,
File_state is:
0 expression this document catalogue by name
1 expression this document regular file by name
The type of 2 expression this document is other
The type failure of this document is obtained in 3 expressions
(b) delete file operation
The file of deletion can be a system file, configuration file, application file.For the safety of file system, realize by the software of PC end.When sending delete command, need to specify the absolute path of deleted file.
The message related to calls structure is following:
Call_Remove_File::Record
{
File_name_len UNSIGNED16;--be used for the length of store files name
File_name [256] UNSIGNED8;--be used for the store files name
}
Response message is following:
Reply_Remove_File::Record
{
}；
(c) check the memory space operation
But check designated disk usage space size.But it should be noted that the usage space of disk and necessarily equal free space.
The structure of request message is following:
Call_Get_Disk_Free_Space::Record
{
Disk_name [32] UNSIGNED8;--be used to deposit the disk name
}；
The structure of response message is following:
Reply_Get_Disk_Free_Space::Record
{
Free_space UNSIGNED32;--be used to deposit the disk space size,, then return-1 if obtain the failure of disk space size.
}；
Embodiment four
A kind of data transmission device 400 that present embodiment provides is used for TCN, and is as shown in Figure 5, and data transmission device 400 comprises:
Operation requests transmitting element 401 is given opposite equip. according to predetermined format transmit operation solicited message, and said operation requests information comprises operation code, transmission mode and routing information;
Response message receiving element 402 receives the response message that said opposite equip. returns;
Said operation requests comprises read request and writes request; Said data manipulation unit 403 comprises:
Described device 400 also comprises:
Described device also comprises:
Memory space is checked unit 406, is used for checking the free space storage of said opposite equip..
In sum, in the technical scheme that the embodiment of the invention provides, a kind of data transmission method and the device that provide based on TCN; Can provide in the vehicle or the communication between the application between vehicle, the present invention is based on the application on the Real-time Transport Protocol, is being used for the RTP of TCN (RealTime Protocol; Real-time protocol (RTP)) on the basis; A smart machine after the device responds request, begins file transfer to another equipment sending function request.Through definition with realize that file uploads, file is downloaded, inquiry file or catalogue, and deleted file is checked five kinds of functions of disk usage space, has realized in train network the file transfer between two equipment.
The thought that method of the present invention has made full use of TFTP (Trivial File Transfer Protocol, TFTP) realizes the function that file is uploaded/downloaded, and abundant file transfer order is provided again, and simple, read-write efficiency is high.Realized on TCN, just can be through a smart machine with system file, configuration file, application file are transferred on other each smart machines, help the maintenance of the file system on the train apparatus.
Obviously, it is apparent to those skilled in the art that above-mentioned each unit of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of unit in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All any modifications of within spirit of the present invention and principle, being done, be equal to replacement, improvement etc., all be included in protection scope of the present invention.
Claims (9)
1. a document transmission method is used for TCN, it is characterized in that, comprising:
Give opposite equip. according to predetermined format transmit operation solicited message, said operation requests information comprises operation code, transmission mode and routing information, and said transmission mode is character pattern or binary mode;
After receiving the affirmation information that said opposite equip. returns, carry out the data message operation according to operation requests information; Said confirmation is sent according to following mode by said opposite equip.: said opposite equip. is after receiving said operation requests information; Judge whether said routing information is correct; If correct, then operate, and feed back said confirmation according to said operation requests information.
2. the method for claim 1 is characterized in that, also comprises:
Confirm the message data capacity according to the MTU of TCN link layer.
3. the method for claim 1 is characterized in that, said operation requests comprises:
Read request is used for downloading said message data from said opposite equip.;
Write request, be used for uploading said message data to said opposite equip..
4. the method for claim 1 is characterized in that, said operation requests also comprises:
Query requests is used for inquiring about the catalogue and the file of said opposite equip., comprises listed files, the attribute of file and file size.
5. the method for claim 1 is characterized in that, said operation requests also comprises:
The deletion action request is used for deleting the file of said opposite equip.; And/or
Memory space is checked request, is used for checking the free memory information of said opposite equip..
6. a file transfer means is used for TCN, it is characterized in that, comprising:
The operation requests transmitting element is given opposite equip. according to predetermined format transmit operation solicited message, and said operation requests information comprises operation code, transmission mode and routing information, and said transmission mode is character pattern or binary mode;
The response message receiving element receives the response message that said opposite equip. returns;
The data manipulation unit after receiving the affirmation information that said opposite equip. returns, carries out the data message operation according to operation requests information; Said confirmation is sent according to following mode by said opposite equip.: said opposite equip. is after receiving said operation requests information; Judge whether said routing information is correct; If correct, then operate, and feed back said confirmation according to said operation requests information.
7. device as claimed in claim 6 is characterized in that, said operation requests comprises read request and writes request; Said data manipulation unit comprises:
The Data Receiving unit when said operation requests is a read request, after said response message receiving element receives the affirmation information that said opposite equip. returns, is used for from said opposite equip. data download;
Data transmission unit, when said operation requests for writing request, after said response message receiving element receives the affirmation information that said opposite equip. returns, upload data to said opposite equip..
8. device as claimed in claim 6 is characterized in that, also comprises:
Query unit is used for inquiring about the catalogue and the file of said opposite equip., comprises listed files, the attribute of file and file size; And check the configuration information on the said opposite equip..
9. device as claimed in claim 6 is characterized in that, also comprises:
Delete cells is used for deleting the file of said opposite equip.; And/or
Memory space is checked the unit, is used for checking the free space storage of said opposite equip..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810178410 CN101409727B (en) | 2008-11-24 | 2008-11-24 | Document transmission method and apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810178410 CN101409727B (en) | 2008-11-24 | 2008-11-24 | Document transmission method and apparatus |
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| CN101409727A CN101409727A (en) | 2009-04-15 |
| CN101409727B true CN101409727B (en) | 2012-12-12 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102468907B (en) * | 2010-11-05 | 2015-07-08 | 北京北方微电子基地设备工艺研究中心有限责任公司 | Transmission method of process data, apparatus thereof and system thereof |
| CN102201903A (en) * | 2011-06-07 | 2011-09-28 | 合肥华云通信技术有限公司 | Simple and reliable remote file transmission method |
| CN106254430B (en) * | 2016-07-25 | 2019-09-17 | 新华三技术有限公司 | A kind of document handling method and device and a kind of interface board |
| CN107995247B (en) * | 2016-10-27 | 2020-07-14 | 腾讯科技（深圳）有限公司 | File transmission method, server and system |
| CN106708436B (en) * | 2016-12-16 | 2023-03-07 | 福州大学 | Wireless storage system based on microcontroller and control method thereof |
| CN107425943A (en) * | 2017-08-31 | 2017-12-01 | 广州视源电子科技股份有限公司 | Packet data transmission method, apparatus, electronic equipment and computer-readable storage medium |
| CN109257442B (en) * | 2018-11-09 | 2021-10-22 | 南方电网科学研究院有限责任公司 | File transmission method, system, terminal and storage medium based on TFTP |
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