CN102970107A - Method and device for breakpoint renewing in data package transmitting procedure - Google Patents
Method and device for breakpoint renewing in data package transmitting procedure Download PDFInfo
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Abstract
The invention discloses a method and device for breakpoint renewing in a data package transmitting procedure. A read index and a temporary read index are arranged, the read index directs to data blocks waiting for responses of the data receiving end, the temporary read index directs to data blocks to be transmitted, and when the data blocks are successfully transmitted, 1 is automatically added on the temporary read index, a next data block can be continuously transmitted before the data receiving end returns the responses, and accordingly transmitting speed of data packages can be quickened. When the data blocks are not received by the data receiving end, a read index value is kept unchanged and stored, the read index value can be read after a data transmitting end is communicated with the data receiving end, a temporary read index value is provided for the read index value, and the data blocks which are not successfully received are transmitted again. The method and device for breakpoint renewing in the data package transmitting procedure improves data package transmitting speed on one hand, and achieves functions of the breakpoint renewing on the other hand.
Description
Technical field
The present invention relates to the wireless data transmission technology field, relate in particular to method and device that a kind of transmission of data packets point of interruption renews.
Background technology
Nowadays automobile assembling multiple electronic system, in order to grasp in real time the working condition of automobile electronic system, the car networking technology is applied to present automotive field, and the car networked system refers to by at vehicle vehicle-mounted terminal equipment being installed, automobile is networked, belong to a kind of of Internet of Things.Vehicle-mounted terminal equipment mainly forms by data acquisition unit, data storage cell with based on the data communication unit of GPRS/3G network etc.Car-mounted terminal in the vehicle can be to the collection of vehicle all working situation and static, multidate information, comprise vehicle bus information, sensor information, vehicle position information etc., with these information storages, and by the data communication unit with cross wireless radio-frequency information is uploaded to internet or remote server, check, analyze information of vehicles to make things convenient for car owner, automaker.
Present stage, the car networking does not have unified host-host protocol in the field, majority is the Protocol of each automaker or auto-parts manufacturer self-defining, the transmission method of general FTP, http protocol can't be applied in the car networking of Protocol in the existing the Internet, the most integral body that adopt of existing car networking data transmission are uploaded, be about to whole data and break into a packet and directly upload remote server, transmission course can not be interrupted.
Owing to have a large amount of dynamic and static data in the vehicle, so car-mounted terminal need to send a large amount of data to remote server.Prior art with data upload to the process of remote server, data are excessive, transmission speed is slow, if there is outage or network failure, there is low, the shortcoming such as lose time of efficiency of transmission in the transmission that needs so again to start anew.
Summary of the invention
In view of this, the invention provides method and device that a kind of transmission of data packets point of interruption renews, solving in the transmission of data packets, because transfer of data interrupts, need again the transmission of data and the problems such as the inefficiency that causes, time waste.
The technical solution used in the present invention is as follows:
On the one hand, the method that the embodiment of the invention provides a kind of transmission of data packets point of interruption to renew, after data receiver and data sending terminal connected again, described method comprised:
S1: obtain the current index value of reading, and the described index value of reading is given and read index temporarily, as read index value temporarily;
S2: send and to be numbered the described data block of temporarily reading index value to data receiver, read the automatic increase by 1 of index value after sending successfully temporarily, repeat this step;
S3: if receive the positive response signal that data receiver returns in the setting-up time section, then reading index value increases by 1; Remain unchanged otherwise read index value, and store the current index value of reading, after pending data receiving terminal and data sending terminal establish a communications link again, execution in step S1.
Particularly, the positive response signal that returns of described data receiver comprises that the data block numbering and the certainty that have received identify.
Particularly, the negative response signal that returns of described data receiver comprises numbering and the negativity sign of the data block that does not receive.
Further, before data receiver and data sending terminal connect for the first time, described method also comprises: described packet is divided at least two data blocks that size is identical, and be described data block serial number, will read index value and read the numbering that index value all is set to current data block to be sent temporarily.
Particularly, described setting-up time section is 180 seconds.
On the other hand, the device that the embodiment of the invention provides a kind of transmission of data packets point of interruption to renew, described device comprises:
Read the index value acquiring unit, be used for obtaining the current index value of reading, and the described index value of reading is given and read index temporarily, as read index value temporarily;
The data block transmitting element be used for to send and to be numbered the described data block of temporarily reading index value to data receiver, reads the automatic increase by 1 of index value after sending successfully temporarily;
The response signal receiving element is used for the response signal that the receive data receiving terminal returns; When the positive response signal that receives data receiver return in the setting-up time section, then reading index value increases by 1; Otherwise the value of reading index remains unchanged;
Memory cell is used for storing and reading index value when reading index value and remain unchanged.
Further, the positive response signal that returns of described data receiver comprises that the data block numbering and the certainty that have received identify.
Further, the negative response signal that returns of described data receiver comprises numbering and the negativity sign of the data block that does not receive.
Further, described device also comprises:
The packet cutting unit is used for described packet is divided at least two data blocks that size is identical, and is described data block serial number, will read index value and read the numbering that index value all is set to current data block to be sent temporarily.
Further, described setting-up time section is 180 seconds.
Method and device that the transmission of data packets point of interruption that the embodiment of the invention provides renews, its beneficial effect is:
Packet is divided into a plurality of equal-sized data blocks, and be each data block serial number, index is read in foundation, the initial value of reading index value is consistent with current data block to be sent numbering, after data receiver receives data block, return the positive response signal, read accordingly index value this moment just can increase by 1, otherwise it is constant to read index value.Can guarantee like this: interrupt in the transmission of data packets, after data sending terminal and data receiver establish a communications link again, at first read index value, resend data block from reading data block corresponding to index value, solved in the transmission of data packets owing to the data packet transmission failure of cutting off the power supply or the network interruption causes, the problem that must from the beginning again transmit has been saved the time, has been improved efficiency of transmission.Simultaneously, the embodiment of the invention is also set up and is read index temporarily, successfully send data block after, read index value temporarily and automatically increase by 1, the data block that needn't wait for the data receiver feedback receives response signal, has saved the time of waiting for feedback acknowledgment information, has improved the transmission speed of packet.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of flow chart of the method that a kind of transmission of data packets point of interruption that Fig. 1 provides for the embodiment of the invention renews;
The another kind of flow chart of the method that a kind of transmission of data packets point of interruption that Fig. 2 provides for the embodiment of the invention renews;
A kind of structural representation of the device that a kind of transmission of data packets point of interruption that Fig. 3 provides for the embodiment of the invention renews;
The another kind of structural representation of the device that a kind of transmission of data packets point of interruption that Fig. 4 provides for the embodiment of the invention renews.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that obtains under the creative work prerequisite.
Embodiment 1
When data sending terminal and data receiver in the transmission of data packet procedures owing to a variety of causes causes communication disruption, so that packet transmits unsuccessfully, after data sending terminal and data receiver establish a communications link again, in order to improve data packet transmission efficient, position continuation transmitting data information from last time, packet interrupted has solved the low problem of data transmission efficiency.
Referring to Fig. 1, the method that the disclosed a kind of transmission of data packets point of interruption of present embodiment renews, after data receiver and data sending terminal connected again, described method comprised:
S101: obtain the current index value of reading, and the described index value of reading is given and read index temporarily, as read index value temporarily;
S102: send and to be numbered the described data block of temporarily reading index value to data receiver, read the automatic increase by 1 of index value after sending successfully temporarily;
S103: if receive the positive response signal that data receiver returns in the setting-up time section, then reading index value increases by 1; Otherwise the value of reading index remains unchanged, and stores the current index value of reading;
S104: judge whether data sending terminal and data receiver establish a communications link again? if so, execution in step S101, otherwise repeated execution of steps S104.
The beneficial effect of the method that the transmission of data packets point of interruption of present embodiment renews:
Foundation is read index and is read index temporarily, reads index point data block to be sent temporarily, after data block sends successfully, read index value temporarily and automatically increase by 1, continue to send next data block, needn't wait for the response signal of data receiver feedback, improved the efficient that data send; On the other hand, what read that index value points to is the data block of waiting for the data receiver response, namely when data receiver after the positive response signal is returned in the internal feedback of setting-up time section, read index value increase by 1; Otherwise, illustrate that data block takes defeat, read index value and remain unchanged.In this case, may be because a variety of causes causes the communication interrupt between data sending terminal and the data receiver, cause data block to take defeat, so after data receiver and data sending terminal connect again, by reading index value, and will read index value and give and read index value temporarily, resend and be numbered the data block of temporarily reading index value, realized that the breakpoint in the data transmission procedure renews.
In sum, present embodiment has improved the transmission speed of packet on the one hand, has realized that the breakpoint of data renews function on the one hand.
Embodiment 2
Referring to Fig. 2, present embodiment discloses the method that a kind of transmission of data packets point of interruption renews, and described method comprises:
S201: packet is divided at least two data blocks that size is identical, and is described data block serial number, will read index value and read the numbering that index value all is set to current data block to be sent temporarily;
Should be noted that packet is divided into the identical data block of a plurality of sizes to be transmitted, and each data block is numbered that this method belongs to the conventional method that those skilled in the art adopt when solving data transmission problems, it will not go into details for present embodiment.
The coated individual equal-sized data block of N that is divided into of present embodiment tentation data, number consecutively is 1,2,3 ... N-1, N, present embodiment is provided with two variablees simultaneously: read index value and read index value temporarily; Wherein, what read index point is current data block to be sent temporarily, and what read index point is data block current to be received.Before data receiver and data sending terminal establish a communications link for the first time, give and read index value and read the same value of index value temporarily, be i.e. the numbering 1 of current data block to be sent.
S202: send and to be numbered the described data block of temporarily reading index value to data receiver, sends successfully after, read the automatic increase by 1 of index value temporarily;
What read index point is current data block to be sent temporarily, continues to use top example, and the current index value of temporarily reading is 1, transmission is numbered 1 data block to data receiver, after data block sent, read index value increased by 1 temporarily automatically, and namely read index value is 2 temporarily.And then send data number and be 2 data block, after data block sends successfully, read index value temporarily and increase to 3, continue to send and be numbered 3 data block to data receiver ... this action is carried out in circulation, until receive the instruction that stops.
S203: in the setting-up time section, receive the positive response of data receiver feedback? if so, execution in step S204 then, otherwise execution in step S205;
In step S202, after success sent data block, data receiver may finally can be received data block, also may not receive data block owing to other reasons, in order to have guaranteed the complete of receive data, must whether receive corresponding data block to the data receiving terminal and monitor.
The present embodiment data receiver can return a positive response signal after the data block that receives, the positive response signal comprises: the data block numbering that has received and certainty sign.On the contrary, if data receiver is not received respective data blocks, the data block of perhaps receiving is incomplete, and a negative response signal is returned in the corresponding meeting of data receiver, and this negative response signal comprises: the numbering of the data block that does not receive and negativity sign.Also have a kind of situation, data receiver does not return any response signal in the setting-up time section, then assert dropout of data block, and data receiver does not receive respective data blocks.
Described setting-up time section, the engineer can set as the case may be, and present embodiment regulation setting-up time section is 180 seconds.
S204: reading index value increases by 1;
According to step S203, data receiver illustrates the successful receive data piece of data receiver to return the positive response signal in the setting-up time section, and reading so index value increases by 1, points to the next data block for the treatment of that receiving terminal receives.
For example, the current index value of reading is 786, when the positive response signal that receives data receiver and feed back, comprises data block numbering 787 and certainty sign in the positive response signal, and reading so index value increases by 1, and the index value of reading after the increase is 787.
S205: read index value and remain unchanged, and store the current index value of reading;
According to step S203, when data receiver does not return the positive response signal in the setting-up time section, illustrate that then data receiver does not successfully receive data block, interrupting appears in transmission course.It is constant then to keep reading index value, and stores the current index value of reading.
Continue to use the example among the step S204, the current index value of reading remains unchanged, and still is 786, and will read index value and store.And because to read index value be point to send data temporarily, read now the index value ratio to read index value large temporarily, may be for greater than any one natural number of 786.
S206: data sending terminal and data receiver connect again;
S207: obtain the current index value of reading, and the described index value of reading is given and read index value temporarily, as read index value temporarily;
According to step S205 and step S206, the current data block of reading index point is in upper once data transmission procedure, continue to use the example of step S205, the current index value of reading is 786, and read index value for greater than 786 natural number temporarily, to read index value and give and read index value temporarily, and make and read index point temporarily and be numbered 786 data block.Repeating step S202, send be numbered read index value 786 temporarily data block to data receiver, realized the function that the data transmission procedure point of interruption renews.
The beneficial effect of present embodiment:
Before data sending terminal and data receiver establish a communications link for the first time, packet is divided into a plurality of equal-sized data blocks, and be the data block number consecutively, read index and read index temporarily by setting, read index point data block to be sent temporarily, after data block sends successfully, read index value temporarily and automatically increase by 1, continue to send next data block, needn't wait for the response signal of data receiver feedback, improved the efficient that data send; On the other hand, what read that index value points to is to wait for the current data block that is received by data receiver, and namely after receiving the positive response signal that data receiver feeds back, reading index value increases by 1; When the negative response signal that receives data receiver feedback or in the setting-up time section, do not receive response signal, illustrate that so data block takes defeat, read index value and remain unchanged.In this case, may be because a variety of causes causes the communication interrupt between data sending terminal and the data receiver, cause data block to take defeat, so after data receiver and data sending terminal connect again, by reading index value, and will read index value and give and read index value temporarily, resend and be numbered the data block of temporarily reading index value, realized that the breakpoint in the data transmission procedure renews.
Embodiment 3
Referring to Fig. 3, the device that present embodiment provides a kind of transmission of data packets point of interruption to renew, described device comprises:
Read index value acquiring unit 301, be used for obtaining the current index value of reading, and the described index value of reading is given and read index temporarily, as read index value temporarily;
Data block transmitting element 302 be used for to send and to be numbered the described data block of temporarily reading index value to data receiver, reads the automatic increase by 1 of index value after sending successfully temporarily;
Response signal receiving element 303 is used for the response signal that the receive data receiving terminal returns; When the positive response signal that receives data receiver return in the setting-up time section, then reading index value increases by 1; Otherwise the value of reading index remains unchanged;
Memory cell 304 is used for storing and reading index value when reading index value and remain unchanged; And transmission stops the instruction that data send.
The beneficial effect of the embodiment of the present application:
Foundation is read index and is read index temporarily, reads index point data block to be sent temporarily, after data block sends successfully, read index value temporarily and automatically increase by 1, continue to send next data block, needn't wait for the response signal of data receiver feedback, improved the efficient that data send; On the other hand, what read that index value points to is to wait for the current data block that is received by data receiver, and namely after receiving the positive response signal that data receiver feeds back, reading index value increases by 1; When the negative response signal that receives data receiver feedback or in the setting-up time section, do not receive response signal, illustrate that so data block takes defeat, read index value and remain unchanged.In this case, may be because a variety of causes causes the communication interrupt between data sending terminal and the data receiver, cause data block to take defeat, so after data receiver and data sending terminal connect again, by reading index value, and will read index value and give and read index value temporarily, resend and be numbered the data block of temporarily reading index value, realized that the breakpoint in the data transmission procedure renews.
Embodiment 4
Referring to Fig. 4, the device that present embodiment provides a kind of transmission of data packets point of interruption to renew, described device comprises:
Before data sending terminal and data receiver first established a communications link, described packet cutting unit 401 was divided into a plurality of equal-sized data blocks with packet, and is the data block serial number.To read index value and read the numbering that index value all is set to current data block to be sent temporarily.
Read index value acquiring unit 402, be used for obtaining the current index value of reading, and the described index value of reading is given and read index temporarily, as read index value temporarily;
Data sending terminal and data receiver for a certain reason and interrupt communication after they establish a communications link again, are read index value acquiring unit 402 and are obtained and read index value, and the described index value of reading is given and read index temporarily, as read index value temporarily.
Data block transmitting element 403 be used for to send and to be numbered the described data block of temporarily reading index value to data receiver, reads the automatic increase by 1 of index value after sending successfully temporarily; After receiving the instruction that stops the data transmission, stop to send data to data receiver;
Response signal receiving element 404 is used for the response signal that the receive data receiving terminal returns; When the positive response signal that receives data receiver return in the setting-up time section, then reading index value increases by 1; Otherwise the value of reading index remains unchanged;
The positive response signal that described data receiver returns comprises data block numbering and the certainty sign that has received; The negative response signal that described data receiver returns comprises numbering and the negativity sign of the data block that does not receive.
Described setting-up time section, the engineer can set as the case may be, and present embodiment regulation setting-up time section is 180 seconds.
The beneficial effect of present embodiment:
Before data sending terminal and data receiver establish a communications link for the first time, packet is divided into a plurality of equal-sized data blocks, and be the data block number consecutively, read index and read index temporarily by setting, read index point data block to be sent temporarily, after data block sends successfully, read index value temporarily and automatically increase by 1, continue to send next data block, needn't wait for the response signal of data receiver feedback, improved the efficient that data send; On the other hand, what read that index value points to is to wait for the current data block that is received by data receiver, and namely after receiving the positive response signal that data receiver feeds back, reading index value increases by 1; When the negative response signal that receives data receiver feedback or in the setting-up time section, do not receive response signal, illustrate that so data block takes defeat, read index value and remain unchanged.In this case, may be because a variety of causes causes the communication interrupt between data sending terminal and the data receiver, cause data block to take defeat, so after data receiver and data sending terminal connect again, by reading index value, and will read index value and give and read index value temporarily, resend and be numbered the data block of temporarily reading index value, realized that the breakpoint in the data transmission procedure renews.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation that does not break away from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. the method that the transmission of data packets point of interruption renews is characterized in that, after data receiver and data sending terminal established a communications link again, described method comprised:
S1: obtain the current index value of reading, and the described index value of reading is given and read index temporarily, as read index value temporarily;
S2: send and to be numbered the described data block of temporarily reading index value to data receiver, read the automatic increase by 1 of index value after sending successfully temporarily, repeat this step;
S3: if receive the positive response signal that data receiver returns in the setting-up time section, then reading index value increases by 1; Remain unchanged otherwise read index value, and store the current index value of reading, after pending data receiving terminal and data sending terminal establish a communications link again, execution in step S1.
2. the method for claim 1 is characterized in that, the positive response signal that described data receiver returns comprises data block numbering and the certainty sign that has received.
3. the method for claim 1 is characterized in that, the negative response signal that described data receiver returns comprises numbering and the negativity sign of the data block that does not receive.
4. the method for claim 1, it is characterized in that, before data receiver and data sending terminal connect for the first time, described method also comprises: described packet is divided at least two data blocks that size is identical, and be described data block serial number, will read index value and read the numbering that index value all is set to current data block to be sent temporarily.
5. the method for claim 1 is characterized in that, described setting-up time section is 180 seconds.
6. the device that the transmission of data packets point of interruption renews is characterized in that, comprising:
Read the index value acquiring unit, be used for obtaining the current index value of reading, and the described index value of reading is given and read index temporarily, as read index value temporarily;
The data block transmitting element be used for to send and to be numbered the described data block of temporarily reading index value to data receiver, reads the automatic increase by 1 of index value after sending successfully temporarily;
The response signal receiving element is used for the response signal that the receive data receiving terminal returns; When the positive response signal that receives data receiver return in the setting-up time section, then reading index value increases by 1; Otherwise the value of reading index remains unchanged;
Memory cell is used for storing and reading index value when reading index value and remain unchanged.
7. device as claimed in claim 6 is characterized in that, the positive response signal that described data receiver returns comprises data block numbering and the certainty sign that has received.
8. device as claimed in claim 6 is characterized in that, the negative response signal that described data receiver returns comprises numbering and the negativity sign of the data block that does not receive.
9. device as claimed in claim 6 is characterized in that, described device also comprises:
The packet cutting unit is used for described packet is divided at least two data blocks that size is identical, and is described data block serial number, will read index value and read the numbering that index value all is set to current data block to be sent temporarily.
10. device as claimed in claim 6 is characterized in that, described setting-up time section is 180 seconds.
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