CN102970107B - The method that the transmission of data packets point of interruption renews and device - Google Patents
The method that the transmission of data packets point of interruption renews and device Download PDFInfo
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Abstract
The invention discloses method and device that a kind of transmission of data packets point of interruption renews, read index by arranging and read index temporarily, read the data block that index point waits for data receiver response, read the data block that index point is to be sent temporarily, after data block is successfully sent, read index value temporarily and automatically increase by 1, and after the reception response waiting for that data receiver returns need not be gone, continue to send next data block again; Improve speed packet transmission.And when data block is not received by data receiver, reading index value remains unchanged, and store; After pending data transmitting terminal and data receiver establish a communications link again, read index value, and will read index value give read index value temporarily, resend the data block be not successfully received.The method that the transmission of data packets point of interruption provided by the invention renews and device, improve the speed of data packet transmission on the one hand, achieves the function that breakpoint renews on the one hand.
Description
Technical field
The present invention relates to wireless data transmission technology field, particularly relate to method and device that a kind of transmission of data packets point of interruption renews.
Background technology
Nowadays the multiple electronic system of automobile assembling, in order to grasp the working condition of automobile electronic system in real time, car networking technology is applied to present automotive field, and car networked system refers to by installing vehicle-mounted terminal equipment on vehicle, automobile is networked, belongs to the one of Internet of Things.Vehicle-mounted terminal equipment forms primarily of data acquisition unit, data storage cell and the data communication unit based on GPRS/3G network etc.Car-mounted terminal in vehicle can to the collection of vehicle all working situation and static, multidate information, comprise vehicle bus information, sensor information, vehicle position information etc., these information are stored, and by data communication unit and mistake wireless radio-frequency, information is uploaded to internet or remote server, to facilitate car owner, automaker checks, analyze information of vehicles.
Present stage, unified host-host protocol is not had in car networking arenas, majority is the Protocol of each automaker or auto-parts manufacturer self-defining, FTP general in existing the Internet, the transmission method of http protocol cannot be applied in the car networking of Protocol, existing car networked data transmission majority adopts entirety to upload, break into a packet by whole data and directly upload remote server, transmitting procedure can not be interrupted.
Owing to there are a large amount of dynamic and static data in vehicle, so car-mounted terminal needs to send a large amount of data to remote server.Prior art by data upload in the process of remote server, data are excessive, and transmission speed is slow, if there is power-off or network failure, so need the transmission that again starts anew, and have that efficiency of transmission is low, the shortcoming such as to lose time.
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, to solve in transmission of data packets, due to data-transmission interruptions, need again to transmit data and the problem such as inefficiency, time waste caused.
The technical solution used in the present invention is as follows:
On the one hand, a kind of method that the embodiment of the present invention provides transmission of data packets point of interruption to renew, after data receiver and data sending terminal connect again, described method comprises:
S1: obtain and current read index value, and described index value of reading is given and read index, as reading index value temporarily temporarily;
S2: send and be numbered the described data block temporarily reading index value to data receiver, sends and reads index value successfully temporarily and automatically increase by 1, repeat this step;
S3: if receive the positive response signal that data receiver returns in setting-up time section, then reading index value increases by 1; Otherwise read index value to remain unchanged, and store and currently read index value, after pending data receiving terminal and data sending terminal establish a communications link again, perform step S1.
Particularly, the positive response signal that described data receiver returns comprises the data block numbering and certainty mark that have received.
Particularly, the negative response signal that described data receiver returns comprises numbering and the negativity mark of the data block do not received.
Further, before data receiver and data sending terminal first time connect, described method also comprises: described packet is divided into the identical data block of at least two sizes, and be described data block order numbering, will index value be read and read the numbering that index value is all set to current data block to be sent temporarily.
Particularly, described setting-up time section is 180 seconds.
On the other hand, embodiments provide the device that a kind of transmission of data packets point of interruption renews, described device comprises:
Reading index value acquiring unit, current reading index value for obtaining, and described index value of reading is given and read index, as reading index value temporarily temporarily;
Data block transmitting element, is numbered the described data block temporarily reading index value to data receiver for sending, and sends to read index value successfully temporarily and automatically increase by 1;
Response signal receiving element, for receiving the response signal that data receiver returns; When the positive response signal receiving data receiver return in setting-up time section, then reading index value increases by 1; Otherwise the value reading index remains unchanged;
Memory cell, for when reading index value and remaining unchanged, stores and reads index value.
Further, the positive response signal that described data receiver returns comprises the data block numbering and certainty mark that have received.
Further, the negative response signal that described data receiver returns comprises numbering and the negativity mark of the data block do not received.
Further, described device also comprises:
Packet segmentation unit, for described packet is divided into the identical data block of at least two sizes, and is described data block order numbering, will reads index value and read the numbering that index value is all set to current data block to be sent temporarily.
Further, described setting-up time section is 180 seconds.
The method that the transmission of data packets point of interruption that the embodiment of the present invention provides renews and device, its beneficial effect is:
Packet segmentation is become multiple equal-sized data block, and be each data block order numbering, index is read in foundation, the initial value reading index value is numbered consistent with current data block to be sent, after data receiver receives data block, return positive response signal, now reading index value accordingly just can increase by 1, otherwise it is constant to read index value.Can ensure like this: interrupt in transmission of data packets, after data sending terminal and data receiver establish a communications link again, first index value is read, data block is resend from the data block reading index value corresponding, solve the data packet transmission failure caused due to power-off or network interruption in transmission of data packets, the problem that must from the beginning again transmit, saves the time, improves efficiency of transmission.Meanwhile, the embodiment of the present invention is also set up and is read index temporarily, after successfully sending data block, read index value temporarily and automatically increase by 1, the data block reception response signal that data receiver feeds back need not be waited for, save the time waiting for feedback acknowledgment information, improve the transmission speed of packet.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
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 present 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 present 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 present 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 present invention renews.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
When data sending terminal and data receiver cause communication disruption due to a variety of causes in transmission process data packet, make data packets failure, after data sending terminal and data receiver establish a communications link again, in order to improve data packet transmission efficiency, from the position continuation transmitting data information that last time, packet interrupted, solve the problem that data transmission efficiency is low.
See Fig. 1, a kind of method that disclosed in the present embodiment, transmission of data packets point of interruption renews, after data receiver and data sending terminal connect again, described method comprises:
S101: obtain and current read index value, and described index value of reading is given and read index, as reading index value temporarily temporarily;
S102: send and be numbered the described data block temporarily reading index value to data receiver, sends and reads index value successfully temporarily and automatically increase by 1;
S103: if receive the positive response signal that data receiver returns in setting-up time section, then reading index value increases by 1; Otherwise the value reading index remains unchanged, and store and currently read index value;
S104: judge whether data sending terminal and data receiver establish a communications link again? if so, step S101 is performed, otherwise repeated execution of steps S104.
The beneficial effect of the method that the transmission of data packets point of interruption of the present embodiment renews:
Foundation is read index and is read index temporarily, reads the data block that index point is to be sent temporarily, and data block sends successfully, read index value temporarily and automatically increase by 1, continue to send next data block, the response signal that data receiver feeds back need not be waited for, improve the efficiency that data send; On the other hand, what read index value sensing is the data block waiting for data receiver response, and namely when data receiver is after positive response signal is returned in the internal feedback of setting-up time section, reading index value increases by 1; Otherwise, data block reception failure is described, reads index value and remain unchanged.In this case, may be because a variety of causes causes the communication between data sending terminal and data receiver to be interrupted, cause data block reception failure, so after data receiver and data sending terminal connect again, by reading index value, and will read index value give read index value temporarily, resend the data block being numbered and reading index value temporarily, the breakpoint achieved in data transmission procedure renews.
In sum, the present embodiment improves the transmission speed of packet on the one hand, and the breakpoint achieving data on the one hand renews function.
Embodiment 2
See Fig. 2, present embodiment discloses a kind of method that transmission of data packets point of interruption renews, described method comprises:
S201: packet is divided into the data block that at least two sizes are identical, and be described data block order numbering, will index value be read and read the numbering that index value is all set to current data block to be sent temporarily;
It should be noted that the data block that packet is divided into multiple size identical is transmitted, and numbered each data block, this method belongs to the conventional method that those skilled in the art adopt when solving data transmission problems, and it will not go into details for the present embodiment.
The present embodiment tentation data bag is divided into N number of equal-sized data block, and number consecutively is 1,2,3 ... N-1, N, the present embodiment is provided with Two Variables 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 current data block to be received.Before data receiver and data sending terminal first time establish a communications link, 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 be numbered the described data block temporarily reading index value to data receiver, send successfully, read index value increases by 1 temporarily automatically;
What read index point is current data block to be sent temporarily, continues to use example above, and current index value of temporarily reading is 1, transmission is numbered the data block of 1 to data receiver, after data block sends, read index value increases by 1 temporarily automatically, and namely read index value is 2 temporarily.And then sending data number is the data block of 2, when data block sends successfully, reads index value temporarily and increases to 3, continues transmission and is numbered the data block of 3 to data receiver ... circulation performs this action, until receive the instruction of stopping.
S203: the positive response receiving data receiver feedback in setting-up time section? if so, then perform step S204, otherwise perform step S205;
In step S202, after success sends data block, data receiver finally may can receive data block, also may not receive data block due to other reasons, receive the complete of data to ensure that, whether must receive corresponding data block to data receiver and monitor.
The present embodiment data receiver is after the data block received, and can return a positive response signal, positive response signal comprises: the data block numbering received and certainty mark.On the contrary, if data receiver does not receive respective data blocks, or the data block received is incomplete, and the corresponding meeting of data receiver returns a negative response signal, and this negative response signal comprises: the numbering of the data block do not received and negativity mark.Also have a kind of situation, data receiver does not return any response signal in setting-up time section, then assert dropout of data block, and data receiver does not receive respective data blocks.
Described setting-up time section, engineer can set as the case may be, and the present embodiment regulation setting-up time section is 180 seconds.
S204: reading index value increases by 1;
According to step S203, data receiver returns positive response signal in setting-up time section, and data receiver successful data reception block is described, so reading index value increases by 1, points to the data block that next termination to be received is received.
Such as, current index value of reading is 786, and when the positive response signal receiving data receiver and feed back, comprise data block numbering 787 and certainty mark in positive response signal, so reading index value increases by 1, and the index value of reading after increase is 787.
S205: read index value and remain unchanged, and store and currently read index value;
According to step S203, when data receiver does not return positive response signal in setting-up time section, then illustrate that data receiver is unsuccessful and receive data block, interrupting appears in transmitting procedure.Then keep that to read index value constant, and store and currently read index value.
Continue to use the example in step S204, current index value of reading remains unchanged, and is still 786, and will read index value and store.And be point to send data owing to reading index value temporarily, read now index value ratio temporarily and read index value greatly, may for any one natural number being greater than 786.
S206: data sending terminal and data receiver connect again;
S207: obtain and current read index value, and described index value of reading is given and read index value, as reading index value temporarily temporarily;
According to step S205 and step S206, the current data block reading index point is in upper once data transmission procedure, continue to use the example of step S205, current index value of reading is 786, and read temporarily index value be greater than 786 natural number, index value imparting will be read and read index value temporarily, and make to read the data block that index point is numbered 786 temporarily.Repeat step S202, send be numbered read index value 786 temporarily data block to data receiver, achieve the function that the data transmission procedure point of interruption renews.
The beneficial effect of the present embodiment:
Before data sending terminal and data receiver first time establish a communications link, packet is divided into multiple equal-sized data block, and be data block number consecutively, read index by arranging and read index temporarily, read the data block that index point is to be sent, data block sends successfully temporarily, read index value temporarily and automatically increase by 1, continue to send next data block, the response signal that data receiver feeds back need not be waited for, improve the efficiency that data send; On the other hand, what read that index value points to is wait for the current data block that received by data receiver, and namely after receiving the positive response signal that data receiver feeds back, reading index value increases by 1; When receiving the negative response signal of data receiver feedback or do not receive response signal in setting-up time section, data block reception failure is so described, reads index value and remain unchanged.In this case, may be because a variety of causes causes the communication between data sending terminal and data receiver to be interrupted, cause data block reception failure, so after data receiver and data sending terminal connect again, by reading index value, and will read index value give read index value temporarily, resend the data block being numbered and reading index value temporarily, the breakpoint achieved in data transmission procedure renews.
Embodiment 3
See Fig. 3, the device that the present embodiment provides a kind of transmission of data packets point of interruption to renew, described device comprises:
Reading index value acquiring unit 301, current reading index value for obtaining, and described index value of reading is given and read index, as reading index value temporarily temporarily;
Data block transmitting element 302, is numbered the described data block temporarily reading index value to data receiver for sending, and sends to read index value successfully temporarily and automatically increase by 1;
Response signal receiving element 303, for receiving the response signal that data receiver returns; When the positive response signal receiving data receiver return in setting-up time section, then reading index value increases by 1; Otherwise the value reading index remains unchanged;
Memory cell 304, for when reading index value and remaining unchanged, stores and reads index value; And send the instruction stopping data sending.
The beneficial effect of the embodiment of the present application:
Foundation is read index and is read index temporarily, reads the data block that index point is to be sent temporarily, and data block sends successfully, read index value temporarily and automatically increase by 1, continue to send next data block, the response signal that data receiver feeds back need not be waited for, improve the efficiency that data send; On the other hand, what read that index value points to is wait for the current data block that received by data receiver, and namely after receiving the positive response signal that data receiver feeds back, reading index value increases by 1; When receiving the negative response signal of data receiver feedback or do not receive response signal in setting-up time section, data block reception failure is so described, reads index value and remain unchanged.In this case, may be because a variety of causes causes the communication between data sending terminal and data receiver to be interrupted, cause data block reception failure, so after data receiver and data sending terminal connect again, by reading index value, and will read index value give read index value temporarily, resend the data block being numbered and reading index value temporarily, the breakpoint achieved in data transmission procedure renews.
Embodiment 4
See Fig. 4, the device that the present embodiment provides a kind of transmission of data packets point of interruption to renew, described device comprises:
Packet segmentation unit 401, for described packet is divided into the identical data block of at least two sizes, and is described data block order numbering, will reads index value and read the numbering that index value is all set to current data block to be sent temporarily.
Before data sending terminal and data receiver first establish a communications link, packet segmentation is become multiple equal-sized data block by described packet segmentation unit 401, and is data block order numbering.To index value be read and read the numbering that index value is all set to current data block to be sent temporarily.
Reading index value acquiring unit 402, current reading index value for obtaining, and described index value of reading is given and read index, as reading index value temporarily temporarily;
Data sending terminal and data receiver interrupt communication for a certain reason, after they establish a communications link again, read index value acquiring unit 402 obtain read index value, and by described read index value give read index, as reading index value temporarily temporarily.
Data block transmitting element 403, is numbered the described data block temporarily reading index value to data receiver for sending, and sends to read index value successfully temporarily and automatically increase by 1; After receiving the instruction stopping data sending, stop sending data to data receiver;
Response signal receiving element 404, for receiving the response signal that data receiver returns; When the positive response signal receiving data receiver return in setting-up time section, then reading index value increases by 1; Otherwise the value reading index remains unchanged;
The positive response signal that described data receiver returns comprises the data block numbering and certainty mark that have received; The negative response signal that described data receiver returns comprises numbering and the negativity mark of the data block do not received.
Described setting-up time section, engineer can set as the case may be, and the present embodiment regulation setting-up time section is 180 seconds.
Memory cell 405, for when reading index value and remaining unchanged, stores and reads index value; And send the instruction stopping data sending.
The beneficial effect of the present embodiment:
Before data sending terminal and data receiver first time establish a communications link, packet is divided into multiple equal-sized data block, and be data block number consecutively, read index by arranging and read index temporarily, read the data block that index point is to be sent, data block sends successfully temporarily, read index value temporarily and automatically increase by 1, continue to send next data block, the response signal that data receiver feeds back need not be waited for, improve the efficiency that data send; On the other hand, what read that index value points to is wait for the current data block that received by data receiver, and namely after receiving the positive response signal that data receiver feeds back, reading index value increases by 1; When receiving the negative response signal of data receiver feedback or do not receive response signal in setting-up time section, data block reception failure is so described, reads index value and remain unchanged.In this case, may be because a variety of causes causes the communication between data sending terminal and data receiver to be interrupted, cause data block reception failure, so after data receiver and data sending terminal connect again, by reading index value, and will read index value give read index value temporarily, resend the data block being numbered and reading index value temporarily, the breakpoint achieved in data transmission procedure renews.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments 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 renews of the transmission of data packets point of interruption, it is characterized in that, after data receiver and data sending terminal establish a communications link again, described method comprises:
S1: obtain and current read index value, and given and read index temporarily by described index value of reading, as reading index value temporarily, describedly reads index point data block to be sent temporarily, described in what read that index value points to is the data block waiting for data receiver response;
S2: send and be numbered the described data block temporarily reading index value to data receiver, sends and reads index value successfully temporarily and automatically increase by 1, repeat this step;
S3: if receive the positive response signal that data receiver returns in setting-up time section, then reading index value increases by 1; Otherwise read index value to remain unchanged, and store and currently read index value, after pending data receiving terminal and data sending terminal establish a communications link again, perform step S1.
2. the method for claim 1, is characterized in that, the positive response signal that described data receiver returns comprises the data block numbering and certainty mark that have 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 mark of the data block do not received.
4. the method for claim 1, it is characterized in that, before data receiver and data sending terminal first time connect, described method also comprises: described packet is divided into the identical data block of at least two sizes, and be described data block order numbering, will index value be read and read the numbering that index value is all 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 renews of the transmission of data packets point of interruption, is characterized in that, comprising:
Read index value acquiring unit, current read index value for obtaining, and described index value of reading is given and read index, as reading index value temporarily temporarily, describedly read index point data block to be sent temporarily, described in what read that index value points to is the data block waiting for data receiver response;
Data block transmitting element, is numbered the described data block temporarily reading index value to data receiver for sending, and sends to read index value successfully temporarily and automatically increase by 1;
Response signal receiving element, for receiving the response signal that data receiver returns; When the positive response signal receiving data receiver return in setting-up time section, then reading index value increases by 1; Otherwise the value reading index remains unchanged;
Memory cell, for when reading index value and remaining unchanged, stores and reads index value.
7. device as claimed in claim 6, is characterized in that, the positive response signal that described data receiver returns comprises the data block numbering and certainty mark that have 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 mark of the data block do not received.
9. device as claimed in claim 6, it is characterized in that, described device also comprises:
Packet segmentation unit, for described packet is divided into the identical data block of at least two sizes, and is described data block order numbering, will reads index value and read the numbering that index value is all set to current data block to be sent temporarily.
10. device as claimed in claim 6, it is characterized in that, described setting-up time section is 180 seconds.
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| CN111400212B (en) * | 2019-09-29 | 2022-02-08 | 杭州海康威视系统技术有限公司 | Transmission method and device based on remote direct data access |
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Address after: 4 / F, building 1, No.14 Jiuxianqiao Road, Chaoyang District, Beijing 100020 Patentee after: Beijing Jingwei Hengrun Technology Co., Ltd Address before: 8 / F, block B, No. 11, Anxiang Beili, Chaoyang District, Beijing 100101 Patentee before: Beijing Jingwei HiRain Technologies Co.,Ltd. |