CN102137441A - method, device and system for data transmission - Google Patents
method, device and system for data transmission Download PDFInfo
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- CN102137441A CN102137441A CN2010106006785A CN201010600678A CN102137441A CN 102137441 A CN102137441 A CN 102137441A CN 2010106006785 A CN2010106006785 A CN 2010106006785A CN 201010600678 A CN201010600678 A CN 201010600678A CN 102137441 A CN102137441 A CN 102137441A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1835—Buffer management
- H04L1/1841—Resequencing
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Abstract
The invention discloses a method, a device and a system for data transmission. The device comprises that: a protocol data unit (PDU) is received, and a first identification in the head information of the PDU indicates whether the data in the PDU is retransmitted or not. In the data transmission method disclosed by the embodiment of the invention, the trouble process in the prior art that a receiver determines whether the received PDCP (Packet Data Convergence Protocol) PDU contains retransmitted data can be avoided, and the transmission efficiency is further improved.
Description
Technical field
The present invention relates to the communications field, relate in particular to data transmission method, equipment and system.
Background technology
LTE (Long Term Evolution, Long Term Evolution) belongs to the Long Term Evolution version of third generation wireless mobile communications agreement.The User Agreement of LTE comprises: PDCP (Packet Data Convergence Protocol, bag grouping convergence protocol), RLC (Radio Link Control, Radio Link control), MAC (Medium Access Control, the medium access control) and PHY (Physical Layer, physical layer).Wherein, the major function of PDCP is: the head compression of IP packet, the encryption and decryption of data, timer abandon, rebuild the processing that retransmits immediately and reorder.
The recipient determines whether to abandon the data procedures that receives according to the SN of PDCP PDU association: if the PDCP PDU SN that receives submits to the PDCP PDU SN on upper strata less than last, then think to receive transmit leg, need carry out discard processing because switch the data that retransmit and repeat to send; If the PDCP PDU SN that perhaps receives and last are submitted to the difference of PDCP PDU SN on upper strata greater than half of PDCP receive window size, equally also can be judged as and receive transmit leg, and carry out discard processing because switch the data that retransmit and repeat to send.
Prior art, the recipient determines to the SN of the PDCP PDU of upper strata submission whether the PDCP PDU that receives comprises data retransmission, and deterministic process is loaded down with trivial details, thereby causes the efficient of transfer of data lower according to SN and the recipient's last time of the PDCP PDU that receives.
Summary of the invention
An aspect of of the present present invention provides a kind of data transmission method, comprising:
Receive protocol Data Unit PDU, whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission.
Another aspect of the present invention provides a kind of data transmission method, comprising:
Send protocol Data Unit PDU, whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission.
Another aspect of the present invention provides a kind of equipment, comprising:
Receiving element is used to receive protocol Data Unit PDU, and whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission.
Another aspect of the present invention also provides a kind of system.
In the embodiment of the invention, the header information of the PDU that data receiver sends comprises first sign, described first sign is used for indicating whether the data of described PDU are data retransmission, the recipient is after receiving data, judge that by sign the data among the PDU are data retransmissions or just pass data, and qualified PDU with data retransmission carried out abandon operation, changed the method for discrimination of discard processing in the prior art, simplified whether the data of judging among the PDU are the process of data retransmission, improved the efficient of transmission course.
Further, this method directly identifies data among the PDU that sends, and need not rely on the SN of the PDCP PDU that the SN of the PDCP PDU that receives in the data transmission procedure and PDCP recipient's the last time submit to the upper strata, improve reliability and the accuracy of differentiating the result, avoided occurring the phenomenon of data receiver and the inconsistent data that abandon normal transmission that cause of transmit leg state variable.
Description of drawings
The structural representation of the PDCP PDU that Fig. 1 provides for one embodiment of the present of invention;
The flow chart of the data transmission method that Fig. 2 provides for one embodiment of the present of invention;
The flow chart of the another data transmission method that Fig. 3 provides for one embodiment of the present of invention;
The structural representation of a kind of equipment that Fig. 4 provides for one embodiment of the present of invention;
The structural representation of the another equipment that Fig. 5 provides for one embodiment of the present of invention;
Fig. 6 is a system configuration schematic diagram provided by the invention.
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 is obtained under the creative work prerequisite.
One embodiment of the present of invention provide a kind of data transmission method, wherein, send protocol Data Unit PDU, and whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission.
With PDCP PDU is example, the structure of PDU as shown in Figure 1, the R TX in the header information of PDU is whether identification data is the retransmission bits position of data retransmission.For example, when R_TX is 1, representing that the data among this PDU are the data that transmit leg retransmits, when R_TX is 0, represent that the data among this PDU are just to pass data, promptly is not the data that transmit leg retransmits.And for example, when R_TX is True, represent that the data among this PDU are the data that transmit leg retransmits, when R_TX is False, represent that the data among this PDU are the first data that pass.
Present embodiment is applicable to the data transmission procedure under the affirmation mode, promptly adopt in the method that present embodiment provides, data receiver is in the process that generates PDU, whether can identify these data by the value that this first sign is set is data retransmission, so that directly judging the PDU that receives according to first sign, the recipient whether comprises data retransmission, simplified the differentiation process of recipient, improved the efficient and the reliability of transfer of data, also saved interface-free resources for data retransmission.
Present embodiment does not limit this architecture advances method yet and only is adapted to PDCP PDU, equally also go for other protocol Data Units, for example, the header information of the protocol Data Unit of MAC layer comprises the retransmission bits position, data among the MAC PDU are identified, whether be the deterministic process of data retransmission, improved the efficient of transmission course to the data among the PDU if having simplified.
As shown in Figure 2, an alternative embodiment of the invention provides a kind of data transmission method, comprises the steps.
Step S21, reception protocol Data Unit PDU, the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmissions.
Data among the PDU of step S22, the described reception of the described first sign judgement of foundation are data retransmissions.
In the present embodiment, the data receiver judges by first sign among the PDU that receives whether the data among this PDU are data retransmission, have simplified the differentiation process for data retransmission, have improved the efficient and the reliability of protocol transmission.
Present embodiment can also comprise the steps.
Step S23, judge that whether described PDU is the outer PDU of window that reorders, if, execution in step S25 then; Otherwise execution in step S24.
For example, judge whether to be for the outer PDU process of the window that reorders: the difference of the sequence number SN that obtains described PDU and the last PDU SN that submits to the upper strata, when described difference when reordering length of window, described PDU is the outer PDU that receives of window that reorders.Wherein, the window size that reorders can be set according to actual conditions, for example, the window size that reorders is made as 1/2nd of SN quantity.The quantity of supposing SN is 4096, and the window size that then reorders is 2048.Suppose that SN quantity is 8192, the window size that then reorders is 4096.
When the data among the described PDU are when just passing data, it can be carried out directly submitting to the upper strata after buffer memory, the ordering, the above layer of PDU corresponding protocols layer used as described, repeats no more herein.
Step S24, judge whether to be cached with the PDU identical with described PDU, if, execution in step S25 then; Otherwise, execution in step S26.
Step S25, abandon described PDU.
In this step,, the identical PDU of reprocessing be can avoid, treatment effeciency and accuracy helped improving by abandoning the PDU that receives.
Step S26, the described PDU of buffer memory.
In this step,, can avoid abandoning the data that transmit leg just passes, avoid losing of data, improve the transmission quality of data because of what erroneous judgement led to errors by the PDU that buffer memory receives.
Optionally, the data among the PDU that the recipient receives are when just passing data, can be considered as the recipient and receive the data that all need retransmit.
Present embodiment can also comprise step S27: behind the PDU that receives whole data retransmissions, the PDU that includes data retransmission that receives is sorted according to the ascending order of COUNT value, according to the order of sequence PDU is submitted to the upper strata then.Wherein, recipient's counter COUNT is made of upset statistical counting HFN and SN, and the COUNT among each PDU is identical with its corresponding SN.
In the present embodiment, to whether needing to be dropped by the PDU that the condition judgment of identical PDU has data retransmission by reorder window and current whether buffer memory, improved the accuracy of judged result, avoid occurring the phenomenon of data receiver and the inconsistent data that abandon normal transmission that cause of transmit leg state variable, improved the reliability of data transmission procedure.
As shown in Figure 3, an alternative embodiment of the invention provides a kind of data transmission method, comprises the steps.
Step S31, reception protocol Data Unit PDU, the data among the described PDU of the sign of first in the header information of described PDU indication are not data retransmissions.
Data among the PDU of step S32, the described reception of the described first sign judgement of foundation are not data retransmissions.
Step S33, judge whether the first biography data among the PDU are the data that send behind the link re-establishment, if then execution in step S34 if not, then carries out S35.
Step S34, to judge that whether PDU SN submits to the SN of PDU on upper strata than the last time big by 1, if then submit the PDU of described reception to the upper strata; Otherwise, the PDU that buffer memory receives.
The PDU SN that step S35, foundation receive upgrades relevant state variables, and submits the PDU of described reception to the upper strata.
This process is specifically as follows: when the PDU SN that receives expected the PDU SN of reception less than the next one, the statistical counting HFN that will overturn added 1.
That is to say, when the data among the PDU that receives are not data retransmission, if the data that normally send and receive, its SN is for increasing progressively, the scope of supposing SN is 0-4095, and transmit leg can continue to lay equal stress on, and to send SN be the data of 0-4095 in recurrence, the data of a 0-4095 of every transmission, SN upset statistical counting HFN will add 1, with the number of times of expression transfer of data.The SN that supposes current reception is 3, the SN that so next expectation receives should be 4, if but during the SN that the SN of current reception should receive less than the next one, for example the SN of its reception is 2, illustrate that this moment, the recipient received data in the last process of transmitting, the loss of data phenomenon has taken place in the also promptly last transfer of data, then recipient's HFN is inconsistent with transmit leg this moment, thereby cause PDCP layer transmit leg and recipient in that to carry out encryption and decryption inconsistent according to the encryption and decryption COUNT parameter that HFN and SN calculate when handling, and cause the recipient to decrypt wrong data, and continue to cause the failure of recipient's decompression.
In order to guarantee in the follow-up data transmission procedure, the HFN of recipient and transmit leg is consistent, guarantee the normal transmission of data, in the method that present embodiment provides, when the PDU SN that judges reception expects the PDU SN of reception less than the next one, for recipient's HFN adds 1 automatically, thereby effectively guarantee the PDU quantity of in link, losing surpass data receiver and recipient SN upset count status variable HFN when reordering window size synchronously, promoted protocol layer enable that user's face non-NULL cryptographic algorithm is encrypted and ROHC compression treatment conditions under high-speed digital transmission handle reliability and stability.
As shown in Figure 4, an alternative embodiment of the invention provides a kind of equipment, comprising: transmitting element 41, be used to send PDU, and whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission.The equipment that present embodiment provides can be used for realizing the step that carry out method transmit leg that the foregoing description provides or base station, repeats no more herein.The equipment that present embodiment provides can be the base station, perhaps can send other equipment of packet to UE.
As shown in Figure 5, a kind of equipment that an alternative embodiment of the invention provides comprises: receiving element 51, be used to receive PDU, and whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission.
Optionally, this equipment also comprises: processing unit 52, the data that are used for as described PDU are that data retransmission and described PDU are the interior PDU that receives of window that reorders, and the buffer memory PDU identical with it, perhaps when the data among the described PDU be that data retransmission and described PDU when reordering the PDU that receives outside the window, abandon described PDU; Perhaps be used for when described PDU be when reordering the PDU that receives in the window and PDU that buffer memory is not identical with it, the described PDU of buffer memory.
Optionally, processing unit 52 can comprise memory cell 53, by the described PDU of memory cell 53 buffer memorys.
For example, the course of work of each unit in this equipment is: receiving element receives the PDU that data receiver sends, processing unit judges according to the sign of first in the header information among the PDU whether the data among this PDU are data retransmission, when judging the PDU with data retransmission is the PDU that reorders and receive in the window, and the buffer memory PDU identical with it, perhaps described PDU with data retransmission is when reordering the outer PDU that receives of window, the PDU that receives is abandoned, when judging the PDU with data retransmission is when reordering the PDU that receives in the window and PDU that buffer memory is not identical with it, the described PDU of buffer memory.
The equipment that present embodiment provides can be used for realizing the step that method recipient that the foregoing description provides carries out, and repeats no more herein.The equipment that present embodiment provides can be user equipment (UE), for example mobile phone etc.
The present invention also provides a kind of data transmission system, and its structure comprises as shown in Figure 6: data receiver 61 and data receiver 62, wherein:
Described data receiver 61 is used for, and sends protocol Data Unit PDU, and whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission;
Described data receiver 62 is used for, and receives the PDU that described transmit leg sends.
Further, described data receiver also is used for, when the data among the described PDU are that data retransmission and described PDU are the PDU that reorders and receive in the window, and the buffer memory PDU identical with it, perhaps when the data among the described PDU be that data retransmission and described PDU when reordering the PDU that receives outside the window, abandon described PDU; Perhaps be used for when described PDU be when reordering the PDU that receives in the window and PDU that buffer memory is not identical with it, the described PDU of buffer memory.
The method that data receiver 61 in the system that present embodiment provides and the communication process between the data receiver 62 and other same treatment can provide referring to the foregoing description repeats no more herein.
Equipment that the embodiment of the invention provides and system, judge by the sign of first in the header information of PDU whether the data among the described PDU are data retransmission, simplified differentiation process, improved the efficient and the reliability of transfer of data, also saved interface-free resources data retransmission.And, whether window and current whether buffer memory are needed to be dropped by the PDU that the condition judgment of identical PDU has data retransmission by reordering, improved the accuracy of judged result, avoided occurring the phenomenon of data receiver and the inconsistent data that abandon normal transmission that cause of transmit leg state variable, improve the reliability of data transmission procedure, improved the service behaviour of equipment and system.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For the disclosed equipment of embodiment, because it is corresponding with the embodiment disclosed method, so description is fairly simple, relevant part partly illustrates referring to method and gets final product.
The professional can also further recognize, the unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software clearly is described, the composition and the step of each example described prevailingly according to function in the above description.These functions still are that software mode is carried out with hardware actually, depend on the application-specific and the design constraint of technical scheme.The professional and technical personnel can use distinct methods to realize described function to each specific should being used for, but this realization should not thought and exceeds scope of the present invention.
The method of describing in conjunction with embodiment disclosed herein or the step of algorithm can directly use the software module of hardware, processor execution, and perhaps the combination of the two is implemented.Software module can place the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or the technical field.
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 conspicuous concerning those skilled in the art, and defined herein General Principle can realize in other embodiments without departing from the scope of the invention.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (12)
1. a data transmission method is characterized in that, comprising:
Receive protocol Data Unit PDU, whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission.
2. method according to claim 1 is characterized in that, also comprises:
Data among the described PDU of the described first sign indication are data retransmission, and described PDU is not the outer PDU that receives of window that reorders, and during the PDU that buffer memory is identical with it, abandon described PDU; Perhaps,
Data among the described PDU of the described first sign indication are data retransmission, and described PDU when reordering the outer PDU that receives of window, abandons described PDU.
3. method according to claim 2 is characterized in that, the data among the described PDU of the described first sign indication are data retransmission, and described PDU is not the outer PDU that receives of window that reorders, and during the PDU that buffer memory is not identical with it, the described PDU of buffer memory.
4. according to claim 2 or 3 described methods, it is characterized in that, also comprise:
Obtain the sequence number SN and the difference of last time of described PDU to the PDU SN of upper strata submission;
When described difference when reordering length of window, described PDU is the outer PDU that receives of window that reorders.
5. method according to claim 1 is characterized in that, also comprises:
Data among the described PDU of the described first sign indication are not data retransmissions, and during for the data that receive behind the link re-establishment, and the SN of the PDU whether SN that judges described PDU submits to than the last time is big by 1, if, then submit described PDU to the upper strata, otherwise, the described PDU of buffer memory.
6. method according to claim 5, it is characterized in that, data among the described PDU of the described first sign indication are not data retransmissions, be the data that receive behind the non-link re-establishment, and when the SN of described PDU expects the SN of reception less than the next one, the upset statistical counting variable HFN of SN is added 1, and submit described PDU to the upper strata.
7. a data transmission method is characterized in that, comprising:
Send protocol Data Unit PDU, whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission.
8. method according to claim 7 is characterized in that,
Described PDU comprises data retransmission, and the data among the described PDU of the described first sign indication are data retransmission; Perhaps,
Described PDU comprises biography data just, and the data among the described PDU of the described first sign indication are just to pass data.
9. according to claim 7 or 8 described methods, it is characterized in that,
When described PDU comprised data retransmission, described first was designated 1 or True; Perhaps,
When described PDU comprises when just passing data, described first is designated 0 or False.
10. according to any described method in the claim 9, it is characterized in that described PDU is bag grouping convergence protocol data cell PDCP PDU.
11. an equipment is characterized in that, comprising:
Receiving element is used to receive protocol Data Unit PDU, and whether the data among the described PDU of the sign of first in the header information of described PDU indication are data retransmission.
12. equipment according to claim 11 is characterized in that, also comprises:
Processing unit, the data that are used for as the described PDU of the described first sign indication are data retransmission, described PDU is not the outer PDU that receives of window that reorders, and during the PDU that buffer memory is identical with it, abandons described PDU; Perhaps, the data in the described PDU of the described first sign indication are data retransmission, and described PDU when reordering the outer PDU that receives of window, abandons described PDU; Perhaps, be used for when described PDU be not the PDU that reorders and receive in the window, and during the PDU that buffer memory is not identical with it, the described PDU of buffer memory.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010600678 CN102137441B (en) | 2010-12-22 | 2010-12-22 | method, device and system for data transmission |
| PCT/CN2011/081890 WO2012083762A1 (en) | 2010-12-22 | 2011-11-08 | Data transmission method, apparatus, and system |
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| CN 201010600678 CN102137441B (en) | 2010-12-22 | 2010-12-22 | method, device and system for data transmission |
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| CN102137441A true CN102137441A (en) | 2011-07-27 |
| CN102137441B CN102137441B (en) | 2013-08-07 |
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| WO2012083762A1 (en) * | 2010-12-22 | 2012-06-28 | 华为技术有限公司 | Data transmission method, apparatus, and system |
| CN107027136A (en) * | 2016-02-01 | 2017-08-08 | 中兴通讯股份有限公司 | The method and device of data processing |
| CN107332648A (en) * | 2017-06-23 | 2017-11-07 | 京信通信***（中国）有限公司 | Data repeating method, device, storage medium and its computer equipment |
| CN107404769A (en) * | 2016-05-20 | 2017-11-28 | ***通信有限公司研究院 | A kind of data transmission method and device |
| CN109195183A (en) * | 2018-08-30 | 2019-01-11 | 京信通信***（中国）有限公司 | PDCP layers of data processing method, device and base station |
| WO2019062834A1 (en) * | 2017-09-28 | 2019-04-04 | 华为技术有限公司 | Information transmission method and device |
| CN109600203A (en) * | 2018-11-29 | 2019-04-09 | 西安电子科技大学 | The method for remapping node packet number is carried in a kind of SDAP PDU |
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| CN102137441B (en) * | 2010-12-22 | 2013-08-07 | 华为技术有限公司 | method, device and system for data transmission |
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| WO2012083762A1 (en) * | 2010-12-22 | 2012-06-28 | 华为技术有限公司 | Data transmission method, apparatus, and system |
| CN107027136B (en) * | 2016-02-01 | 2020-11-20 | 中兴通讯股份有限公司 | Data processing method and device |
| CN107027136A (en) * | 2016-02-01 | 2017-08-08 | 中兴通讯股份有限公司 | The method and device of data processing |
| WO2017133595A1 (en) * | 2016-02-01 | 2017-08-10 | 中兴通讯股份有限公司 | Data processing method and apparatus |
| CN107404769A (en) * | 2016-05-20 | 2017-11-28 | ***通信有限公司研究院 | A kind of data transmission method and device |
| CN107332648A (en) * | 2017-06-23 | 2017-11-07 | 京信通信***（中国）有限公司 | Data repeating method, device, storage medium and its computer equipment |
| CN107332648B (en) * | 2017-06-23 | 2021-01-15 | 京信通信***（中国）有限公司 | Data retransmission method and device, storage medium and computer equipment thereof |
| WO2019062834A1 (en) * | 2017-09-28 | 2019-04-04 | 华为技术有限公司 | Information transmission method and device |
| CN109587818A (en) * | 2017-09-28 | 2019-04-05 | 华为技术有限公司 | The transmission method and device of information |
| CN109587818B (en) * | 2017-09-28 | 2021-03-23 | 华为技术有限公司 | Information transmission method and device |
| US10986651B2 (en) | 2017-09-28 | 2021-04-20 | Huawei Technologies Co., Ltd. | Information transmission method and apparatus |
| CN109195183A (en) * | 2018-08-30 | 2019-01-11 | 京信通信***（中国）有限公司 | PDCP layers of data processing method, device and base station |
| CN109195183B (en) * | 2018-08-30 | 2022-03-25 | 京信网络***股份有限公司 | Data processing method and device of PDCP layer and base station |
| CN109600203A (en) * | 2018-11-29 | 2019-04-09 | 西安电子科技大学 | The method for remapping node packet number is carried in a kind of SDAP PDU |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102137441B (en) | 2013-08-07 |
| WO2012083762A1 (en) | 2012-06-28 |
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