CN104486051B - A kind of data repeating method and device - Google Patents
A kind of data repeating method and device Download PDFInfo
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- CN104486051B CN104486051B CN201410753071.9A CN201410753071A CN104486051B CN 104486051 B CN104486051 B CN 104486051B CN 201410753071 A CN201410753071 A CN 201410753071A CN 104486051 B CN104486051 B CN 104486051B
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/22—Negotiating communication rate
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Abstract
The invention discloses a kind of data repeating method and device, this method includes：When being grouped data convergence protocol PDCP and re-establishing, the wireless spread-spectrum technology RLC patterns of Data Radio Bearer DRB are obtained, and count the quantity for the protocol Data Unit PDU for needing to retransmit；If the RLC patterns of current DRB are affirmation mode, and need the quantity of the PDU retransmitted to be more than given threshold, then retransmission rate is reduced, and the PDU for needing to retransmit is sent according to the retransmission rate after reduction.Data can be reduced through the invention retransmits the transmission rate that early period, interior PDCP data retransmitted for a period of time, the state report for waiting for the PDCP of UE to send during re-transmission, and judgement really needs the data of re-transmission again, it avoids being transmitted across the PDU being had been transmitted through before more re-establish, causes the waste of a large amount of interface-free resources.
Description
Technical field
The present invention relates to field of data transmission, it is specifically related to a kind of data repeating method and device.
Background technology
LTE base station (eNB, evolved Node B) or user terminal (UE, User Equipment) by connecing in the air
Mouth is communicated, and is functionally seen, air protocol includes user face protocol stack and chain of command agreement stack.Wherein, air protocol stack
Including following layers：Wireless heterogeneous networks (Radio Resource Control, RRC) layer, Packet Data Convergence Protocol
(Packet Data Convergence Protocol, PDCP) layer, wireless spread-spectrum technology (Radio Link Control,
RLC) layer, media access control (Medium Access Control, MAC) layer.
In normal data transmission procedure, data surface service data that the PDCP of base station can will be stored in local cache
Unit (Service Data Unit, SDU) forms PDCP agreement numbers by header suppression, encryption, addition sequence number SN behind head
It is sent to bottom rlc layer according to unit (Protocol Data Unit, PDU), by the automatic repeat request of rlc layer
Hybrid automatic repeat-request (the Hybrid Automatic of (Automatic Repeat-request, ARQ) and MAC layer
Repeat Request, HARQ) afterwards data be sent to terminal UE.Wherein for the affirmation mode (Acknowledge of rlc layer
Mode, AM) after UE is successfully received one group of data, RLC can indicate PDCP, the PDU of the corresponding PDCP of the SN by UE at
Work(receives, and then PDCP can be deleted and the PDU of the SN and corresponding all PDCPs smaller than the SN in local cache.
When link-quality of eating dishes without rice or wine is deteriorated or other reasons can cause data connection to re-establish, base station
It is retransmitted the corresponding PDU of SN that PDCP can not acknowledged receipt of by UE since first, in the process, the PDCP of base station can connect
The state report for receiving the ends UE can learn which PDU is not received by UE from report, due to the state report of the ends UE feedback
Announcement has certain time delay, and in the process, the PDCP of base station is possible to retransmit many PDU, it is possible to most
PDU is to have been received by UE, does not feed back to base station only, is retransmitted once more at this time in time, especially these
PDU is bigger, will occupy unnecessary interface-free resources, wastes many interface-free resources.
Invention content
A kind of data repeating method of offer of the embodiment of the present invention and device, to solve that data transmission exists in the prior art
The problem of a large amount of interface-free resources being wasted caused by retransmitting PDU due to PDCP during re-establishing.
The embodiment of the present invention provides a kind of data repeating method, and this method includes：
When being grouped data convergence protocol PDCP and re-establishing, the wireless spread-spectrum technology RLC of Data Radio Bearer DRB is obtained
Pattern, and count the quantity for the protocol Data Unit PDU for needing to retransmit；
If the RLC patterns of current DRB are affirmation mode, and need the quantity of the PDU retransmitted to be more than given threshold, then reduce
Retransmission rate, and send the PDU for needing to retransmit according to the retransmission rate after reduction.
Preferably, further including：
During progress PDCP is re-established, if described need the PDU retransmitted to retransmit completion, transmission rate is reverted to
Normal transmission rate.
Preferably, further including：
During progress PDCP is re-established, if receiving the PDCP state reports of terminal, transmission rate is reverted to
Normal transmission rate.
Preferably, after the PDCP state reports for receiving terminal, including：
Obtain the sequence number of the PDU reported in the PDCP state reports of the terminal；
Whether the sequence number of the PDU reported described in judgement is more than the sequence number of the PDU of current re-transmission；
It is retransmitted if it is, the PDU lost from first reported proceeds by data.
Preferably, the reduction retransmission rate, including：
According to the ratio of setting, current retransmission rate is reduced.
The embodiment of the present invention also provides a kind of data retransmission device, which includes：
Data capture unit when being re-established for being grouped data convergence protocol PDCP, obtains Data Radio Bearer DRB
Wireless spread-spectrum technology RLC patterns, and count the quantity of protocol Data Unit PDU for needing to retransmit；
Data retransmission unit if the RLC patterns for current DRB are affirmation mode, and needs the quantity of the PDU retransmitted big
In given threshold, then retransmission rate is reduced, and the PDU for needing to retransmit is sent according to the retransmission rate after reduction.
Preferably, the data retransmission unit is additionally operable to：
During progress PDCP is re-established, if described need the PDU retransmitted to retransmit completion, transmission rate is reverted to
Normal transmission rate.
Preferably, the data retransmission unit is additionally operable to：
During progress PDCP is re-established, if receiving the PDCP state reports of terminal, transmission rate is reverted to
Normal transmission rate.
Preferably, the data retransmission unit is additionally operable to：
After the PDCP state reports for receiving terminal, obtains and reported in the PDCP state reports of the terminal
The sequence number of PDU；
Whether the sequence number of the PDU reported described in judgement is more than the sequence number of the PDU of current re-transmission；
It is retransmitted if it is, the PDU lost from first reported proceeds by data.
Preferably, the data retransmission unit is specifically used for：
According to the ratio of setting, current retransmission rate is reduced.
The embodiment of the present invention counts the quantity for the PDU for needing to retransmit by obtaining the pattern of the RLC of DRB, when confirmation is worked as
The RLC patterns of preceding DRB are affirmation mode, and when the quantity of PDU retransmitted being needed to be more than given threshold, then reduce retransmission rate,
And the PDU for needing to retransmit is sent according to the retransmission rate after reduction.The data weight of PDCP can be reduced through the embodiment of the present invention
Transmission rate when biography, the state report for waiting for the PDCP of UE to send during re-transmission, and judgement is laying equal stress on fax just again
The data retransmitted are needed, prevents from being transmitted across more PDU having been transmitted through, causes the waste of a large amount of interface-free resources.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without having to pay creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 is a kind of flow diagram of data repeating method in the embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of data retransmission device in the embodiment of the present invention.
Specific implementation mode
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention make into
It is described in detail to one step, it is clear that the described embodiments are only some of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
All other embodiment, shall fall within the protection scope of the present invention.
During normal data transfer, the Packet Data Convergence Protocol PDCP of base station can will be stored in the number of local cache
According to face service data unit (Service Data Unit, SDU), after carrying out header suppression, encryption, the heads addition sequence number SN
The protocol Data Unit (Protocol Data Unit, PDU) of composition PDCP is sent to wireless spread-spectrum technology rlc layer.By RLC
The automatic repeat request (Automatic Repeat-request, ARQ) and the mixing of media access control MAC layer of layer weigh automatically
Passing request (Hybrid Automatic Repeat Request, HARQ), data are sent to terminal UE afterwards.Wherein for RLC
Affirmation mode (Acknowledge Mode, AM), after UE successfully receives a bag data, RLC can indicate the SN in PDCP
Corresponding PDCP PDU are properly received by UE, and then PDCP can be deleted and the SN and the institute smaller than the SN in local cache
Corresponding all PDCP PDU.Be related to some dynamic variables among these, we with FstNotAckedSn represent first not by
The SN of the PDCP PDU acknowledged receipt of.The SN of next PDCP PDU that will be sent is represented with NextTxSn.For PDCP AM
For the data of lower wireless data carrying DRB, SN ranges are 0-4095.Such as after PDCP is dealt into 100 from 0, NextTxSn=
101, if the PDCP PDU before RLC indicates SN=50 to PDCP have been properly received by UE, the dynamic variable of PDCP
FstNotAckedSn=50.The timeliness that wherein RLC feeds back PDCP successful reception information can be due to the relevant dynamic ginseng of rlc layer
Several difference and it is different.We enumerate a set of common rlc layer configuration parameter and carry out problem analysis, and such as reorder timer
ReOrderingTimer is configured to 80ms, and inquiry retransmission timer pollRetxTimer is configured to 80ms, PDU number of inquiry
PollPdu is configured to 128, and inquiry byte number pollByte is configured to 125Kbyte.The set parameter can make RLC state reports send out
That send is fewer, saves interface-free resources, but feedback information has larger lag time delay.In order to which problem is better described, below
We are illustrated with specific number.It is found by actual test, on average when the PDCP of base station is sent out since Sn=0
After data, when being sent to NextTxSn=400, the feedback information of a UE can be just obtained, indicates the PDCP before SN=380
PDU is properly received by UE.When base station continues to be sent to NextTxSn=700 again, it is likely that temporarily receive UE's not yet
It feeds back again.
When eat dishes without rice or wine link-quality be deteriorated or other reasons data connection can be caused to re-establish.Base station PDCP at this time
It is retransmitted the SN for the PDU that can not do not acknowledged receipt of by UE since first.From the point of view of scenario above, the PDCP of base station can be from SN=
380 start to retransmit, and retransmit to SN=700 always, then just start to send new data.The PDCP layer transmitting terminals of base station are being rebuild
It will receive the state report of UE immediately, comprising UE to the reception situation of PDCP PDU, i.e. which PDU is received the state report by UE
Which data is not received by UE.But due to space interface signaling interaction time delay, the sides UE and base station side can not possibly simultaneously synchronize carry out weight
It establishes, ordinary circumstance base station ratio UE is re-established earlier, and shape is sent to the PDCP of base station side so as to cause the PDCP of the sides UE
The time of state report will lag.Therefore in above-mentioned scene, the PDCP of base station may receive UE's when retransmitting to SN=600
PDCP layer states report that the state report can carry first and lose SN information (First Miss SN, FSM), FSM instructions
The SN=680 of UE PDCP of first missing before re-establishing, all PDCP PDU before showing SN=680 are before re-establishing
Just it is properly received by UE.At this point, the PDCP of base station can be retransmitted since SN=680, until SN=700 is retransmitted and finished
Transmit new data again afterwards.The above process shows：The most re-transmission data of PDCP of base station are all unnecessary.Such as it is above-mentioned
The data packet of SN=380 to SN=600 is all extra, can especially be occupied when these data packets are all bigger unnecessary
Interface-free resources.
To solve the above-mentioned problems, as shown in Figure 1, an embodiment of the present invention provides a kind of data repeating method, this method
Step includes：
Step S101 when being grouped data convergence protocol PDCP and re-establishing, obtains the radio chains of Data Radio Bearer DRB
Road controls RLC patterns, and counts the quantity for the protocol Data Unit PDU for needing to retransmit；
Step S102 if the RLC patterns of current DRB are affirmation mode, and needs the quantity of the PDU retransmitted to be more than setting threshold
Value then reduces retransmission rate, and sends the PDU for needing to retransmit according to the retransmission rate after reduction.
When data connection caused by link-quality variation or other reasons of eating dishes without rice or wine re-establishes.Detect DRB's
Whether RLC patterns are affirmation mode, and count the quantity for the PDU for needing to retransmit when re-establishing, as the RLC for detecting current DRB
Pattern is affirmation mode, and when the quantity of PDU that retransmits of needs counted is more than the threshold value set, then reduces retransmission rate, and
The PDU for needing to retransmit is sent according to the retransmission rate after reduction.When the data of reduction PDCP retransmit through this embodiment
Transmission rate, during re-transmission wait for UE PDCP send state report, and again judgement lay equal stress on biography really need weight
The data of biography prevent from being transmitted across more PDU having been transmitted through, cause the waste of a large amount of interface-free resources.
Preferably, the present invention provides an embodiment, including：
When data connection caused by link-quality variation or other reasons of eating dishes without rice or wine re-establishes.Detect DRB's
Whether RLC patterns are affirmation mode, and count the quantity for the PDU for needing to retransmit when re-establishing, as the RLC for detecting current DRB
Pattern is affirmation mode, and when the quantity of PDU that retransmits of needs counted is more than the threshold value set, will reduce retransmission rate,
And send the PDU for needing to retransmit according to the retransmission rate after reduction.If during progress PDCP is re-established, due to
The negligible amounts of the affiliated PDU for needing to retransmit, in the case where not waiting until the PDCP state reports of terminal UE upload, if the need
The PDU to be retransmitted, which is retransmitted, to be completed, then cancels the limitation to transmission rate, transmission rate is reverted to normal transmission rate, after
Resume defeated new PDU.The embodiment of the present invention prevents that the PDU retransmitted is needed to retransmit completion, will also be because waiting for terminal UE to upload
PDCP state reports and caused by the time waste.Therefore, it is completed as long as retransmitting, so that it may to continue to transmit new PDU.
Preferably, the present invention provides an embodiments, including：
When data connection caused by link-quality variation or other reasons of eating dishes without rice or wine re-establishes.Detect DRB's
Whether RLC patterns are affirmation mode, and count the quantity for the PDU for needing to retransmit when re-establishing, as the RLC for detecting current DRB
Pattern is affirmation mode, and when the quantity of PDU that retransmits of needs counted is more than the threshold value set, will reduce retransmission rate,
And send the PDU for needing to retransmit according to the retransmission rate after reduction.If during progress PDCP is re-established, need
The PDU of re-transmission retransmits completion not yet, receives the PDCP state reports of terminal at this time, then cancels the limitation to transmission rate,
Transmission rate is reverted into normal transmission rate.The present embodiment is the unnecessary PDU of transmission excessive in order to prevent, causes sky
The waste of mouth resource.
Further, after the PDCP state reports for receiving terminal, so that it may to obtain the PDCP shapes of the terminal
The corresponding sequence number SN of PDU reported in state report, when the sequence number SN of the PDU reported is more than the PDU's of current re-transmission
When sequence number SN, the PDU just lost from first reported proceeds by data re-transmission.When the sequence of the PDU reported
When row number SN is less than or equal to the sequence number SN of the PDU of current re-transmission, just continue to retransmit according to normal transmission rate complete not yet
At PDU, retransmit after the completion of carry out new data transmission again.The present embodiment can save the time of re-transmission, avoid excessive weight
Pass unnecessary PDU.
Preferably, during above-mentioned carry out PDCP is re-established, the retransmission rate that reduces refers to the ratio according to setting
Example, reduces current retransmission rate, such as retransmitted according to 10% regular transmission rate (this ratio can empirically be set,
Proportional region can value 0~100%).
Preferably, the present invention provides an embodiment, including：
When eat dishes without rice or wine link-quality be deteriorated or other reasons data connection can be caused to re-establish.Base station is detected at this time
The pattern of the RLC of current DRB, and the quantity for the PDU for needing to retransmit is counted, such as counting on the quantity for the PDU that needs retransmit is
300.When it is affirmation mode to detect the RLC patterns of current DRB, and currently needs the quantity 300 of the PDU retransmitted to be more than and set
Determine threshold value 30 (this given threshold be free to set, for the integer more than 0), then the PDCP of base station can start not having from first
There is the SN by the UE PDU acknowledged receipt of to start to retransmit, if first by the SN=380 of the UE PDU acknowledged receipt of, at this time
It needs to transmit since the corresponding PDU of SN=380, is transmitted to the corresponding PDU of SN=680 always.In the process, it needs to reduce
Transmission rate, such as normal transmission rate are to transmit 20 PDU each dispatching cycle, then the transmission rate after reducing can be every
A dispatching cycle transmits 3 PDU, i.e., retransmission rate being reduced to 15% normal transmission rate, (this ratio can be empirically
Setting, proportional region can values 0~100%).During data retransmit, as the corresponding SN=400 of the PDU of re-transmission, base
The PDCP to stand receives the PDCP state reports that UE is reported, and first sequence for not being successfully received PDU is carried in this report
Number SN information, such as the SN=600, which is more than the SN of the PDU of current re-transmission, therefore the PDCP of base station can be corresponded to from SN=600
PDU start to be retransmitted according to normal transmission rate, be transmitted to the corresponding PDU of SN=680 always, it is new to start transmission later
PDU.This example demonstrates that most of PDU that the PDCP of base station is retransmitted is unnecessary, such as above-mentioned SN=380 to SN=
599 corresponding PDU are extra, data repeating methods according to the present invention, can be saved to avoid these extra PDU are transmitted
Save a large amount of interface-free resources.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of data retransmission device, since the device solves
The principle of problem is similar to a kind of above-mentioned data repeating method, therefore the implementation of the device may refer to the implementation of method, repeats
Place repeats no more.
As shown in Fig. 2, the device includes：
Data capture unit 201 when being re-established for being grouped data convergence protocol PDCP, obtains Data Radio Bearer
The wireless spread-spectrum technology RLC patterns of DRB, and count the quantity for the protocol Data Unit PDU for needing to retransmit；
Data retransmission unit 202 if the RLC patterns for current DRB are affirmation mode, and needs the number of the PDU retransmitted
Amount is more than given threshold, then reduces retransmission rate, and send the PDU for needing to retransmit according to the retransmission rate after reduction.
Preferably, the data retransmission unit 202 is additionally operable to：
During progress PDCP is re-established, if described need the PDU retransmitted to retransmit completion, transmission rate is reverted to just
Normal transmission rate.
Preferably, the data retransmission unit 202 is additionally operable to：
During progress PDCP is re-established, if receiving the PDCP state reports of terminal, transmission rate is reverted to just
Normal transmission rate.
Preferably, the data retransmission unit 202 is additionally operable to：
Obtain the sequence number of the PDU reported in the PDCP state reports of the terminal；
Whether the sequence number of the PDU reported described in judgement is more than the sequence number of the PDU of current re-transmission；
It is retransmitted if it is, the PDU lost from first reported proceeds by data.
Preferably, the data retransmission unit 202 is specifically used for：
According to the ratio of setting, current retransmission rate is reduced.
From the above, it is seen that whether the embodiment of the present invention is affirmation mode by the RLC patterns for detecting DRB, and
Statistics needs the quantity of the PDU retransmitted when re-establishing, when detecting that the RLC patterns of current DRB are affirmation mode, and the need counted
When the quantity for the PDU to be retransmitted is more than the threshold value of setting, retransmission rate will be reduced, and send according to the retransmission rate after reduction
The PDU for needing to retransmit.It completes either to receive the PDCP state reports of terminal when the PDU of the re-transmission is retransmitted, then takes
Transmission rate is reverted to normal transmission rate by the limitation to disappear to transmission rate.It can prevent from being transmitted across more transmission
The PDU crossed causes the waste of a large amount of interface-free resources.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or box in journey and/or box and flowchart and/or the block diagram.These computer programs can be provided
Instruct the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine so that the instruction executed by computer or the processor of other programmable data processing devices is generated for real
The device for the function of being specified in present one flow of flow chart or one box of multiple flows and/or block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or
The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (6)
1. a kind of data repeating method, which is characterized in that this method includes：
When being grouped data convergence protocol PDCP and re-establishing, the wireless spread-spectrum technology RLC moulds of Data Radio Bearer DRB are obtained
Formula, and count the quantity for the protocol Data Unit PDU for needing to retransmit；
If the RLC patterns of current DRB are affirmation mode, and need the quantity of the PDU retransmitted to be more than given threshold, then re-transmission is reduced
Rate, and send the PDU for needing to retransmit according to the retransmission rate after reduction；
Further include：
During progress PDCP is re-established, if receiving the PDCP state reports of terminal, transmission rate is reverted to normally
Transmission rate；
After the PDCP state reports for receiving terminal, including：
Obtain the sequence number of the PDU reported in the PDCP state reports of the terminal；
Whether the sequence number of the PDU reported described in judgement is more than the sequence number of the PDU of current re-transmission；
It is retransmitted if it is, the PDU lost from first reported proceeds by data.
2. the method as described in claim 1, which is characterized in that further include：
During progress PDCP is re-established, if described need the PDU retransmitted to retransmit completion, transmission rate is reverted to normally
Transmission rate.
3. the method as described in claim 1, which is characterized in that the reduction retransmission rate, including：
According to the ratio of setting, current retransmission rate is reduced.
4. a kind of data retransmission device, which is characterized in that the device includes：
Data capture unit when being re-established for being grouped data convergence protocol PDCP, obtains the nothing of Data Radio Bearer DRB
Wired link controls RLC patterns, and counts the quantity for the protocol Data Unit PDU for needing to retransmit；
Data retransmission unit if the RLC patterns for current DRB are affirmation mode, and need the quantity of the PDU retransmitted to be more than and sets
Determine threshold value, then reduces retransmission rate, and the PDU for needing to retransmit is sent according to the retransmission rate after reduction；
The data retransmission unit is additionally operable to：
During progress PDCP is re-established, if receiving the PDCP state reports of terminal, transmission rate is reverted to normally
Transmission rate；
The data retransmission unit is additionally operable to：
After the PDCP state reports for receiving terminal, obtain the PDU's reported in the PDCP state reports of the terminal
Sequence number；
Whether the sequence number of the PDU reported described in judgement is more than the sequence number of the PDU of current re-transmission；
It is retransmitted if it is, the PDU lost from first reported proceeds by data.
5. device as claimed in claim 4, which is characterized in that the data retransmission unit is additionally operable to：
During progress PDCP is re-established, if described need the PDU retransmitted to retransmit completion, transmission rate is reverted to normally
Transmission rate.
6. device as claimed in claim 4, which is characterized in that the data retransmission unit is specifically used for：
According to the ratio of setting, current retransmission rate is reduced.
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| CN201410753071.9A CN104486051B (en) | 2014-12-09 | 2014-12-09 | A kind of data repeating method and device |
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| CN201410753071.9A CN104486051B (en) | 2014-12-09 | 2014-12-09 | A kind of data repeating method and device |
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| JP6041964B1 (en) * | 2015-09-24 | 2016-12-14 | 株式会社Ｎｔｔドコモ | Wireless communication apparatus and wireless communication method |
| BR112018008349A2 (en) * | 2015-10-29 | 2018-10-30 | Koninklijke Philips Nv | wireless medical device, medical monitoring system, non-transient storage media, and device |
| WO2017143504A1 (en) * | 2016-02-23 | 2017-08-31 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods used in user equipment and associated ues |
| CN108702649B (en) * | 2016-04-15 | 2022-01-11 | 富士通株式会社 | Transmission device and method for status indication and communication system |
| EP3494756B1 (en) | 2016-08-09 | 2024-10-02 | Samsung Electronics Co., Ltd. | Method and apparatus for managing user plane operation in wireless communication system |
| CN107801210B (en) * | 2016-09-06 | 2021-01-15 | 中国移动通信有限公司研究院 | Data transmission method, system and device |
| CN109937587B (en) * | 2017-03-10 | 2022-06-14 | 株式会社Kt | Buffer status report transmission method and equipment thereof |
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