CN103369509B - A kind of reporting cached state method and terminal device - Google Patents
A kind of reporting cached state method and terminal device Download PDFInfo
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- CN103369509B CN103369509B CN201210087962.6A CN201210087962A CN103369509B CN 103369509 B CN103369509 B CN 103369509B CN 201210087962 A CN201210087962 A CN 201210087962A CN 103369509 B CN103369509 B CN 103369509B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
Abstract
The invention discloses a kind of reporting cached state method and terminal device, when reaching new up data to be transferred in wireless spread-spectrum technology (RLC) entity or PDCP (PDCP) entity of terminal device and being unsatisfactory for conventional cache state report (BSR) and cycle BSR condition, the new buffer status report of the up buffer data size information for indicating the terminal device is triggered；Or trigger conventional BSR when in the RLC entities or PDCP entities of terminal device reaching new up data to be transferred；Or the duration for retransmitting BSR timers is set to be less than or equal to the minimum period that the time division duplex of time division duplex long evolving system configures.The improved reporting cached state method that this programme proposes, can improve promptness and accuracy that network side knows upstream data amount, network side is understood the True Data amount situation of terminal device in time, and be unlikely to cause signaling overload occur.
Description
Technical field
The present invention relates to the communications field, more particularly to a kind of reporting cached state method and terminal device.
Background technology
Current Long Term Evolution (LTE, Long Term Evolution) technology, micro-wave access to global intercommunication (Wimax,
Worldwide Interoperability for Microwave Access), super mobile broadband (UMB, Ultra
Mobile Broadband) system has two kinds of duplex modes：FDD (FDD, Frequency Division Duplex)
Mode and time division duplex (TDD, Time Division Duple) mode.Under FDD modes, Uplink/Downlink is using different
Frequency band carries out data transmission simultaneously, and under TDD modes, Uplink/Downlink is carried out data transmission using identical frequency band timesharing.
In the wireless system carried out data transmission with radio frames (Radio Frame) for unit, radio open transmission
Uplink/Downlink is usually that data are transmitted in units of radio frames, wherein, each radio frames are by several subframes
(Subframe) form.For LTE system, subframe is with OFDM (Orthogonal Frequency
Division Multiplexing) symbol (Symbol) is base unit composition, each radio frames are made up of 10 subframes.
The resource allocation of the uplink/downlink subframe of FDD system is relatively independent, you can with to descending sub frame and sub-frame of uplink
Resource allocation is carried out respectively.In TDD system can according to the needs of business according to certain ratio by some subframes of radio frames
It is divided into sub-frame of uplink and descending sub frame, the ratio of general TDD system sub-frame of uplink and descending sub frame number has several species, with
Meets the needs of different service types.According to the demand of different regions type of service, appropriate up-downgoing proportional arrangement is selected to have
Beneficial to the spectrum efficiency for improving TDD system.Such as the more area of downloading data business, it is possible to select descending son
Configuration more than frame；The area more for uploading business, it is possible to select the configuration that sub-frame of uplink is more；For upper download
Portfolio compares the area of balance, it is possible to selects the similar identical proportional arrangement of ascending-descending subframes.
In current LTE TDD (abbreviation TD-LTE) system, 7 kinds of modes are set to the uplink-downlink configuration of TDD system, such as
Shown in table 1 below.One radio frames contains 10 subframes, and subframe numbers are respectively labeled as：0,1,2,3,4,5,6,7,8,9, wherein,
" D " represents that the subframe is descending sub frame；" U " represents that the subframe is sub-frame of uplink；" S " represents that the subframe is special subframe, i.e., should
Subframe contains downlink transfer part, protection interval and uplink part.
Table 1：Existing uplink-downlink configuration list in TD-LTE system
Table 1 is as can be seen that downlink transfer accounts for the percentage of times of all transmission from 40% to 90%, such uplink/downlink
Subframe ratio setting is mainly to consider that downstream data traffic is typically more than the spy of upstream data service in multimedia service till now
Point.
In existing LTE technologies, network side is informed in cell by broadcast system message (SI, System Information)
All user equipmenies (UE, User Equipment) this cell configured using which kind of TDD uplink/downlink.How to select on TDD/
Downstream arrangements are then network internal problems of implementation, wherein the data of operator's long-time statistical are may relate to, known to network side
Current uplink/downlink business datum amount to be passed and other tactful sexual factors.In order to further reduce propagation delay time, UE energy is saved
Amount, increase throughput of system, lift network performance, a kind of method that dynamic changes TDD uplink/downlink configuration is suggested, it is desirable to can
So that TDD uplink/downlink configuration can change in real time with portfolio, TDD system flexible configuration can be so played to greatest extent
The advantage of uplink/downlink subframe ratio, the overriding challenge that this method faces are that network side needs to know that current network is real-time
Uplink/downlink portfolio.Reporting cached state (the Buffer Status Reporting) mechanism used at present is that one kind is based on patrolling
That collects channel priority reports mechanism, and this, which results in network side, can not in time and accurately understand upstream data amount in UE, from
And irrational TDD uplink/downlink may be used to configure.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of reporting cached state method and terminal device, solves existing slow
Network side caused by depositing state reporting mode knows the problem of promptness and bad accuracy of upstream data amount.
In order to solve the above-mentioned technical problem, the invention provides a kind of reporting cached state method, wherein, terminal device
New up data to be transferred and not is reached in wireless spread-spectrum technology (RLC) entity or PDCP (PDCP) entity
When meeting the condition of conventional cache state report (BSR) and cycle buffer status report (BSR), trigger for indicating the terminal
The new buffer status report of the up buffer data size information of equipment；Or wireless spread-spectrum technology (RLC) entity of terminal device
Or trigger conventional BSR when in PDCP (PDCP) entity reaching new up data to be transferred；Or set and retransmit
The duration of BSR timers is less than or equal to the minimum period that the time division duplex of time division duplex long evolving system configures.
Further, the above method can also have the characteristics that：
Reached in wireless spread-spectrum technology (RLC) entity or PDCP (PDCP) entity of the terminal device
New up data to be transferred and it is unsatisfactory for conventional cache state report (BSR) and the condition of cycle buffer status report (BSR)
When, when determining whether that the filling bit number for filling BSR adds the size of its subheader less than long BSR, trigger for indicating institute
State the new buffer status report of the up buffer data size information of terminal device.
Further, the above method can also have the characteristics that：
Up buffer data size information refers to all up to be passed in up caching after the transmission of Transmission Time Interval
The data volume of data, or after the transmission of Transmission Time Interval the new up data to be transferred data volume.
Further, the above method can also have the characteristics that：
The new buffer status report intervenes control control (MAC) element (CE) carrying by media.
Further, the above method can also have the characteristics that：
Carry the new buffer status report media intervention control control element MAC subheaders area flag identifier field by
A numerical value in Binary Zero 1011 to 11000 represents.
Further, the above method can also have the characteristics that：
After the terminal device sends the new buffer status report, start or restarting retransmits BSR timers
With cycle BSR timer.
In order to solve the above-mentioned technical problem, present invention also offers a kind of terminal device, including reporting cached state to optimize
Processing module；Wherein, the reporting cached state optimization processing module, for the wireless spread-spectrum technology in the terminal device
(RLC) reach new up data to be transferred in entity or PDCP (PDCP) entity and be unsatisfactory for conventional cache
When state report (BSR) and the condition of cycle buffer status report (BSR), trigger for indicating the up slow of the terminal device
The new buffer status report of deposit data amount information；Or for the terminal device wireless spread-spectrum technology (RLC) entity or
Conventional BSR is triggered when reaching new up data to be transferred in PDCP (PDCP) entity；Or for setting weight
The duration for passing BSR timers is less than or equal to the minimum period that the time division duplex of time division duplex long evolving system configures.
Further, above-mentioned terminal device can also have the characteristics that：
Reporting cached state optimization processing module, it is additionally operable in wireless spread-spectrum technology (RLC) entity or packet data convergence
New up data to be transferred is reached in agreement (PDCP) entity and is unsatisfactory for conventional cache state report (BSR) and cycle caching
During the condition of state report (BSR), determine whether that the filling bit number for filling BSR is less than long BSR plus the big of its subheader
Hour, trigger the new buffer status report of the up buffer data size information for indicating the terminal device.
Further, above-mentioned terminal device can also have the characteristics that：
Up buffer data size information refers to all up to be passed in up caching after the transmission of Transmission Time Interval
The data volume of data, or after the transmission of Transmission Time Interval the new up data to be transferred data volume.
Further, above-mentioned terminal device can also have the characteristics that：
Reporting cached state optimization processing module, it is additionally operable to send the new buffer status report in the terminal device
Afterwards, start or restart and retransmit BSR timers and cycle BSR timer.
The improved reporting cached state method that this programme proposes, can improve network side and know the timely of upstream data amount
Property and accuracy, make network side understand the True Data amount situation of terminal device in time, and be unlikely to cause signaling mistake occur
Carry.
Brief description of the drawings
Fig. 1 is a kind of schematic diagram for triggering conventional BSR；
Fig. 2 is second of triggering routine BSR schematic diagram；
Fig. 3 is reporting cached state method schematic diagram；
Fig. 4 is reporting cached state method schematic diagram in specific embodiment one；
Fig. 5 is reporting cached state method schematic diagram in specific embodiment two.
Embodiment
In cellular network, generally ascending resource or downlink resource are uniformly dispatched by network side, descending
Data are sent to UE by network side, therefore network side knows the data volume of downlink data, but upstream data is sent by UE sides
To network side, if UE is obstructed to know network side, network side can not know that the data volume of upstream data and upstream data reach
Time, and can not configure suitable ascending resource for UE send upstream data.In LTE, pass through reporting cached state machine
System, how many current upstream data of UE informing networks side have to be sent, assisted network side distribution ascending resource.In LTE technologies,
Network side will safeguard the priority between different UE in cell, while also safeguard the preferential of each UE inside Different Logic channel
Level, therefore LTE BSR mechanism is logic-based channel priority.
Network side is that UE configures two timers by RRC (Radio Resource Control) signaling：BSR is retransmitted to determine
When device (retxBSR-Timer) and cycle BSR timer (periodicBSR-Timer).
In the presence of three kinds of BSR modes：Conventional BSR (Regular BSR), cycle (Periodic BSR) and filling (Padding
BSR)。
When there is new upstream data to turn into up data to be transferred in UE RLC entities or PDCP entities, and it is described new
The priority of logic channel belonging to up data to be transferred higher than buffer have before this up data to be transferred logic channel or
When not having up data to be transferred in person's current buffer, it will trigger conventional BSR.For example, touched as shown in Figure 1 to be a kind of
Regular BSR schematic diagram is sent out, 101 be upper row buffer, wherein having all up logic channel (LC, Logical
Channel data to be transferred), LC2 and LC3 data to be transferred is stored in buffer 101 before this, and LC1 priority is high
In LC2, LC2 priority is higher than LC3, has new data to reach in current LC1, it will triggering Regular BSR.Such as Fig. 2 institutes
Second of triggering Regular BSR schematic diagram is shown as, 201 be upper row buffer, wherein there being all up logic channels
Data to be transferred, and LC1 priority is higher than LC2, and LC2 priority is higher than LC3.Do not have number to be passed in buffer before this
According to current LC3 has newly arrived data to be transferred, due to not having data to be transferred in buffer, will now trigger Regular
BSR.The third triggering Regular BSR situation be when retransmitting BSR timer expiries and UE has up data to be transferred,
Regular BSR will be triggered.
It is Periodic BSR and Padding BSR for other two kinds of BSR.Periodic BSR trigger condition is week
Phase BSR timer expiry, and Padding BSR trigger condition be due to then current transmission time interval (TTI,
Transmission Time Interval) in MAC layer create Medium Access Control (MAC) Protocol Data Unit (MAC PDU, MAC Protocol
Data Unit) in not comprising Regular BSR or Periodic BSR, while filling bit (Padding bit) therein
When more than or equal to one BSR MACCE adds the size of its MAC subheaders, it will triggering Padding BSR.Above-mentioned setting
Reason is that filling bit does not have any information content, BSR is placed wherein to reduce the wasting of resources.
The MAC PDU created for MAC layer, a BSR can only be carried, such as when some TTI does not only have Regular
BSR is triggered, while Periodic BSR are also triggered, then can only send a BSR.It is if from figure 1 it appears that current
Have that the priority for the logic channel LC1 that new data to be transferred reaches is identical with LC2 or LC3, or priority is less than LC2 and LC3
In any one when, reporting for Regular BSR can't be triggered, in order to reduce the signalling eated dishes without rice or wine, network generally will not
By the too small of the value setting of cycle BSR timer and re-transmission BSR timers, and filling bit generally will not be too many, usually only sufficient
The data to be transferred amount of a logic channel group is enough reported, the logic channel group of this necessarily highest priority.For wishing to pass through
Dynamic adjustment TDD configurations and lifted for the method for network performance, above-mentioned BSR reports mechanism and unfavorable.
As shown in figure 3, the reporting cached state method that this programme provides includes：The wireless spread-spectrum technology of terminal device
(RLC) reach new up data to be transferred in entity or PDCP (PDCP) entity and be unsatisfactory for conventional cache
When state report (BSR) and the condition of cycle buffer status report (BSR), trigger for indicating the up slow of the terminal device
The new buffer status report of deposit data amount information；
Or arrived in wireless spread-spectrum technology (RLC) entity or PDCP (PDCP) entity of terminal device
Conventional BSR is triggered during up to new up data to be transferred；
Or set and retransmit time division duplex of the duration of BSR timers less than or equal to time division duplex long evolving system
The minimum period of configuration.
Reached in wireless spread-spectrum technology (RLC) entity or PDCP (PDCP) entity of the terminal device
New up data to be transferred and it is unsatisfactory for conventional cache state report (BSR) and the condition of cycle buffer status report (BSR)
When, when determining whether that the filling bit number for filling BSR adds the size of its subheader less than long BSR, trigger for indicating institute
State the new buffer status report of the up buffer data size information of terminal device.
Up buffer data size information refers to all up to be passed in up caching after the transmission of Transmission Time Interval
The data volume of data, or after the transmission of Transmission Time Interval the new up data to be transferred data volume.
The new buffer status report intervenes control control (MAC) element (CE) carrying by media, and this carrying is described new slow
Depositing the media intervention of state report, to control the size of control element be a byte, and the area flag identifier field of its MAC subheader is by two
A numerical value in system 01011 to 11000 represents.
After the terminal device sends the new buffer status report, start or restarting retransmits BSR timers
With cycle BSR timer.
When UE sends the new buffer status report currently without ascending resource, triggering sends dispatch request
(Scheduling Request) flow.
Terminal device corresponding to the above method includes reporting cached state optimization processing module, and this module performs the above method
Described in corresponding executive mode, here is omitted.
This programme is described in detail below by specific embodiment.
Specific embodiment one
It is the schematic flow diagram of specific embodiment as shown in Figure 4.
S401：New up data to be transferred reaches.
When UE RLC entities or PDCP entities have upstream data to turn into data to be transferred, new up treat is expressed as
Data are passed to reach.
For RLC entities, RLC data PDU RLC service data units (SDU, Service are not assembled into not yet
Data Unit) or its segmentation；Waiting the RLC data PDU retransmitted and being triggered needs what is be transmitted in next transmission opportunity
Status PDU (STATUS PDU) or its a part are considered as the data to be transferred of rlc layer.
For PDCP entities, do not carry by PDCP processing but also not yet by PDCP SDU that PDCP layers are handled or
Give the PDCP PDU of lower floor；Or in lossless switching, have been committed to lower floor but do not receive the PDCP of Successful transmissions confirmation
SDU or PDCP PDU are considered as the data to be transferred of PDCP layers.
When there is upstream data to turn into above-mentioned rlc layer or PDCP layer data to be transferred in UE, then it represents that new up number to be passed
According to arrival.
S402：The MAC CE for generating the up buffer data size information for indicating UE are referred to as new data arrival MAC CE.
It is a byte that new data, which reaches MAC CE sizes, wherein the content carried is the transmission by Transmission Time Interval
Afterwards in up caching all up data to be transferred data volume, or after the transmission of Transmission Time Interval it is described new up
The data volume of data to be transferred.If content is for the former, need to represent after this TTI transmission, the data volume size in caching；If
Content is the latter, then needs to represent after this TTI transmission, the size of newly arrived data volume.Because possible network side dispensing
Ascending resource it is relatively more, a part of newly arrived data can also be transmitted.
8 bits that new data is reached in MAC CE can represent 0~511 totally 512 grades, can use agreement
Buffer size grade corresponding to original BSR in 36.321, can also be extended to use to original corresponding table, in former table
64 grades outside data volume is divided again, new corresponding table can also be specified.The new data reaches report MAC
The LCID domains of CE MAC subheaders use a numerical value in Binary Zero 1011 to 11000 to represent.
If the ascending resource that this TTI divides is enough to accommodate all up data to be transferred, including newly arrived data to be transferred, then
MAC CE need not be generated, are also not required to carry out reporting cached state, subsequent step all needs not continue to perform, and flow terminates.
S403：Judge whether the trigger condition for meeting Regular BSR or Periodic BSR, if it is, performing step
S404, otherwise perform step S40.
S404：Regular BSR or Periodic BSR are triggered, new data is deleted and reaches MAC CE, flow terminates.
S405：Judge whether the trigger condition for meeting Padding BSR, if it is, performing step S406, otherwise perform
S408。
S406：Judge whether filling bit number is more than or equal to the size that long BSR add its subheader, if it is, holding
Row step S407, otherwise perform step S408.
S407：Filling BSR is deleted, transmission new data reaches MAC CE.
Because now filling bit number is less than the size that long BSR add its subheader, if therefore transmission Padding
BSR must be short BSR (Short BSR) or block BSR (Truncated BSR), can only represent in up caching priority compared with
The data to be transferred amount of high logic channel, it is not enough to represent current real up caching situation, so now deleting Padding
BSR related datas, it is changed to transmit new data arrival MAC CE in the original position for preparing transmission Padding BSR, flow terminates.
S408, transmission new data reach MAC CE.
Due to not triggering Padding BSR now, then illustrate the up bit of vacant inadequate resource 8, now initiate hair
SR flow is sent, ascending resource is asked to network side, sending new data after ascending resource after network allocation reaches MAC CE.Can
Can due to etc. it is to be transmitted when generate new new data again and reach MAC CE, during transmission, the new data of transmission generation time the latest
MAC CE are reached, flow terminates.
Specific embodiment two
Specific embodiment two is different from specific embodiment and generates new data after new up data to be transferred reaches in
MAC CE are reached, but it is determined that new data is regenerated after carrying out new buffer status report reaches MAC CE.
It is the schematic flow diagram of specific embodiment as shown in Figure 5.
S501：New up data to be transferred reaches, identical with step 401, repeats no more.
S502：Judge whether the trigger condition for meeting Regular BSR or Periodic BSR, if it is, performing step
S503, otherwise perform step S504.
S503：Regular BSR or Periodic BSR are triggered, flow terminates.
S504：Judge whether the trigger condition for meeting Padding BSR, if it is, performing step S505, otherwise perform
S507。
S505：Judge whether filling bit number is more than or equal to the size that long BSR add its subheader, if it is, holding
Row step S506, otherwise perform step S507.
S506：Triggering filling BSR, flow terminate.
S507：The MAC CE for generating the up buffer data size information for indicating UE are referred to as new data arrival MAC CE simultaneously
Transmission, flow terminate.
Specific embodiment three
When there is new up data to be transferred to reach in UE, i.e., when there is upstream data to turn into foregoing rlc layer or PDCP in UE
During layer data to be transferred, then Regular BSR report flow is triggered.If also triggering cycle BSR while triggering conventional BSR,
Then determine which kind of BSR sent by UE.The essence of the present embodiment is exactly to be accused by changing triggering Regular BSR condition to reach
Know in network side UE up caching be really data volume purpose.
Specific embodiment four
In the prior art, if retransmitting BSR timer expiries, while there is data to be transferred transmission in UE any logic channel
When, it will conventional BSR is triggered, but in existing LTE system, the minimum value for retransmitting BSR timers is 320 milliseconds (ms), if TD-
The LTE TDD configuration change cycles are 10ms, then the conventional BSR that re-transmission BSR timer expiries are triggered is not enough to adapt to such as
This fast TDD configuration change cycle.Therefore, set the duration for retransmitting BSR timers to be less than or equal to the TDD of TD-LTE system to match somebody with somebody
Put the minimum period of change, it is ensured that network side obtains real caching situation inside UE in time.
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually any combination.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Various corresponding changes and deformation, but these corresponding changes and deformation can be made according to the present invention by knowing those skilled in the art
The protection domain of appended claims of the invention should all be belonged to.
One of ordinary skill in the art will appreciate that all or part of step in the above method can be instructed by program
Related hardware is completed, and described program can be stored in computer-readable recording medium, such as read-only storage, disk or CD
Deng.Alternatively, all or part of step of above-described embodiment can also be realized using one or more integrated circuits.Accordingly
Ground, each module/unit in above-described embodiment can be realized in the form of hardware, can also use the shape of software function module
Formula is realized.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (8)
1. a kind of reporting cached state method, wherein,
Reached in the wireless spread-spectrum technology RLC entities or PDCP PDCP entities of terminal device new up to be passed
Data and when being unsatisfactory for conventional cache state report BSR and cycle buffer status report BSR condition, are triggered for indicating institute
State the new buffer status report of the up buffer data size information of terminal device；
Reached in the wireless spread-spectrum technology RLC entities or PDCP PDCP entities of the terminal device new up
Data to be transferred and when being unsatisfactory for conventional cache state report BSR and cycle buffer status report BSR condition, is determined whether
When filling BSR filling bit number adds the size of its subheader less than long BSR, trigger for indicating the terminal device
The new buffer status report of row buffer data size information.
2. the method for claim 1, wherein
Up buffer data size information refers to after the transmission of Transmission Time Interval all up data to be transferred in up caching
Data volume, or after the transmission of Transmission Time Interval the new up data to be transferred data volume.
3. method as claimed in claim 1 or 2, wherein,
The new buffer status report intervenes control control MAC Elements Cs E carryings by media.
4. method as claimed in claim 3, wherein,
The area flag identifier field for carrying the MAC subheaders of the media intervention control control element of the new buffer status report is entered by two
A numerical value in system 01011 to 11000 represents.
5. method as claimed in claim 1 or 2, wherein,
After the terminal device sends the new buffer status report, start or restarting retransmits BSR timers and week
Phase BSR timer.
6. a kind of terminal device, including reporting cached state optimization processing module；Wherein,
The reporting cached state optimization processing module, for the terminal device wireless spread-spectrum technology RLC entities or point
New up data to be transferred is reached in group data convergence protocol PDCP entities and is unsatisfactory for conventional cache state report BSR and week
During phase buffer status report BSR condition, trigger the new of the up buffer data size information for indicating the terminal device and delay
Deposit state report；
Reporting cached state optimization processing module, is additionally operable in wireless spread-spectrum technology RLC entities or PDCP
New up data to be transferred is reached in PDCP entities and is unsatisfactory for conventional cache state report BSR and cycle buffer status report
During BSR condition, when determining whether that the filling bit number for filling BSR adds the size of its subheader less than long BSR, triggering is used
In the new buffer status report for the up buffer data size information for indicating the terminal device.
7. terminal device as claimed in claim 6, wherein,
Up buffer data size information refers to after the transmission of Transmission Time Interval all up data to be transferred in up caching
Data volume, or after the transmission of Transmission Time Interval the new up data to be transferred data volume.
8. terminal device as claimed in claims 6 or 7, wherein,
Reporting cached state optimization processing module, it is additionally operable to after the terminal device sends the new buffer status report, opens
Dynamic or restarting retransmits BSR timers and cycle BSR timer.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210087962.6A CN103369509B (en) | 2012-03-29 | 2012-03-29 | A kind of reporting cached state method and terminal device |
| PCT/CN2013/073348 WO2013143474A1 (en) | 2012-03-29 | 2013-03-28 | Buffer status reporting method and terminal device |
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|---|---|---|---|
| CN201210087962.6A CN103369509B (en) | 2012-03-29 | 2012-03-29 | A kind of reporting cached state method and terminal device |
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| CN110300428A (en) * | 2018-03-23 | 2019-10-01 | 展讯通信（上海）有限公司 | BSR triggering method and device, storage medium, user equipment for PDCP duplication |
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