CN104104484B - The method and apparatus that change for configuring to time division duplex in LTE is adapted to - Google Patents
The method and apparatus that change for configuring to time division duplex in LTE is adapted to Download PDFInfo
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Abstract
Embodiments of the present invention provide the method and apparatus being adapted to the change that time division duplex in LTE configures, wherein one of method includes when the quantity of hybrid automatic repeat request process is reduced, for the process being reduced, in response to receiving affirmative acknowledgement, hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement is discharged.This method further includes, in response to receiving negative response, abandoning hybrid automatic repeat request (HARQ) corresponding with the negative response for reduced process number, being retransmitted with trigger data.The method and apparatus of embodiment through the invention can speed up the update to hybrid automatic repeat-request buffer, shortens and recurs delay, so that it is guaranteed that the system performance in time division duplex configuration change.
Description
Technical field
Embodiments of the present invention are generally related to the communications field, when more particularly, to in long evolving system LTE
The method and apparatus for dividing the change of duplex configuration to be adapted to.
Background technique
In the time division duplex configuration TDD operation mode of long evolving system, different semi-static matched by providing seven kinds
The uplink (UL) set-downlink (DL) configuration, allows asymmetrical UL/DL to distribute.Due in different TDD UL/
The number of DL and UL subframe is different in DL configuration, therefore, is configured for different TDD, the mixed automatic retransfer of UL/DL
The maximum number of request (HARQ) process is different.Following table 1 and table 2 respectively illustrate the DL for different TDD configurations
With the maximum process number of UL HARQ.
| TDD UL/DL configuration | The maximum process number of HARQ |
| 0 | 4 |
| 1 | 7 |
| 2 | 10 |
| 3 | 9 |
| 4 | 12 |
| 5 | 15 |
| 6 | 6 |
Table 1：The maximum number of DL HARQ process in TDD
Table 2：The number of synchronous UL HARQ in TDD
In 3GPP RAN#58 meeting, have approved for DL-UL interference management in LTE TDD and flow adaptation into one
The new WI of step enhancing (eIMTA) proposes.By TDD eIMTA version 12, configured in the variation due to flow from a kind of TDD
When becoming another TDD configuration, the maximum process number of HARQ can change.Therefore, the processing of user equipment (UE) is thought over
Process, such as, the processing of HARQ and re-transmission, especially when the HARQ process number (HPN) of former frame be greater than reconfigure after into
It is even more so when journey.For example, when becoming configuration 3 from configuration 5, maximum DL HPN value is from 15 when the increase due to UL flow
Become 9.In this case, will be likely to occur the further extension of HARQ delay, it is not necessary to data retransmit and right
The management of HARQ process/buffer occurs abnormal.This is incited somebody to action so that UE and eNB can not carry out normal subsequent operation, and make
Performance deterioration.Accordingly, it is desirable to provide one kind can in TDD eIMTA as brought by TDD configuration change it is unmatched
The method and apparatus that HARQ process number HPN is adapted to.
Summary of the invention
In order to alleviate or solve above-mentioned at least some technical problems, embodiments of the present invention provide a kind of effective machine
System, so that avoiding the decoding error as caused by data redundancy and further harq buffer device from updating in TDD configuration variation
The delay retransmitted with data, thus significantly ensures the performance of eIMTA.
According to embodiment of the present invention, the change that time division duplex configures in a kind of couple of LTE is provided to be adapted to
Method.This method includes when the quantity of hybrid automatic repeat request process is reduced, for the process being reduced, in response to connecing
Affirmative acknowledgement is received, hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement is discharged.This method further includes for reduction
Process number abandons hybrid automatic repeat request (HARQ) corresponding with the negative response, in response to receiving negative response to trigger number
According to re-transmission.
According to another implementation of the invention, the change that time division duplex configures in a kind of couple of LTE is provided to fit
The method matched.This method includes, in response to receiving affirmative acknowledgement, releasing when the quantity of hybrid automatic repeat request process is reduced
Put hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement.This method further includes retaining in response to receiving negative response
Data in hybrid automatic repeat request process corresponding with the negative response, to execute the re-transmission of physical layer.
According to embodiment of the present invention, the change that time division duplex configures in a kind of couple of LTE is provided to be adapted to
Method.This method includes, for the process being reduced, determining user when the quantity of hybrid automatic repeat request process is reduced
The hybrid automatic repeat request (HARQ) that equipment abandons.This method further includes abandoning data corresponding with the hybrid automatic repeat request (HARQ),
And trigger data retransmits.
According to another implementation of the invention, the side that the change that time division duplex configures in a kind of couple of LTE is adapted to
Method.This method includes determining that user equipment is protected for negative response when the quantity of hybrid automatic repeat request process is reduced
The hybrid automatic repeat request (HARQ) stayed.This method further includes executing physics to the data in the hybrid automatic repeat request (HARQ) retained
The re-transmission of layer.
According to another implementation of the invention, the change that time division duplex configures in a kind of couple of LTE is provided to fit
The equipment matched.The equipment includes the first processing unit, is configured as when the quantity of hybrid automatic repeat request process is reduced, needle
Hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement is discharged in response to receiving affirmative acknowledgement to the process being reduced.
First processing unit is additionally in response to receive negative response, abandon mixed automatic retransfer corresponding with the negative response into
Journey is retransmitted with trigger data.
According to another implementation of the invention, the change that time division duplex configures in a kind of couple of LTE is provided to fit
The equipment matched.The equipment includes release device, is configured as when the quantity of hybrid automatic repeat request process is reduced, in response to
Affirmative acknowledgement is received, hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement is discharged.The equipment further includes retaining device,
It is configured to respond to receive negative response, retain in hybrid automatic repeat request process corresponding with the negative response
Data, to execute the re-transmission of physical layer.
According to another implementation of the invention, the change that time division duplex configures in a kind of couple of LTE is provided to fit
The equipment matched.The equipment includes the first determining device, is configured as when the quantity of hybrid automatic repeat request process is reduced, needle
To the process being reduced, the hybrid automatic repeat request (HARQ) that user equipment abandons is determined.The equipment further includes drop device, is configured
To abandon data corresponding with the hybrid automatic repeat request (HARQ).In addition, the equipment further includes trigger device, it is configured as triggering
Data retransmit.
According to another implementation of the invention, the change that time division duplex configures in a kind of couple of LTE is provided to fit
The equipment matched, the equipment include the second determining device, are configured as when the quantity of hybrid automatic repeat request process is reduced, really
Determine user equipment and is directed to the hybrid automatic repeat request (HARQ) that negative response is retained.The equipment further includes retransmission arrangement, is configured as
To the data in the hybrid automatic repeat request (HARQ) retained, the re-transmission of physical layer is executed.
Using embodiments of the present invention, loss of data and unnecessary transmission can be reduced, to ensure that eIMTAx system
The performance of system.
Detailed description of the invention
According to the detailed description of illustrative embodiments with reference to the accompanying drawing, above and other purpose of the invention, spy
The advantage of seeking peace will be apparent, in the accompanying drawings：
Fig. 1 schematically show according to one embodiment of the present invention for HARQ process number reduce when, in uplink
In the flow chart of method that is configured of change for being configured to time division duplex in LTE；
Fig. 2 schematically shows when reducing for HARQ process number of another embodiment according to the present invention, in uplink
In the flow chart of method that is configured of change for being configured to time division duplex in LTE；
Fig. 3 schematically show according to one embodiment of the present invention for HARQ process number reduce when, in downlink
In the flow chart of method that is configured of change for being configured to time division duplex in LTE；
Fig. 4 schematically shows when reducing for HARQ process number of another embodiment according to the present invention, in downlink
In the flow chart of method that is configured of change for being configured to time division duplex in LTE；
Fig. 5 schematically show according to one embodiment of the present invention for HARQ process number reduce when, in uplink
In the block diagram of equipment that is configured of change for being configured to time division duplex in LTE；
Fig. 6 schematically shows when reducing for HARQ process number of another embodiment according to the present invention, in uplink
In the block diagram of equipment that is configured of change for being configured to time division duplex in LTE；
Fig. 7 schematically show according to one embodiment of the present invention for HARQ process number reduce when, in downlink
In the block diagram of equipment that is configured of change for being configured to time division duplex in LTE；
Fig. 8 schematically shows when reducing for HARQ process number of another embodiment according to the present invention, in downlink
In the block diagram of equipment that is configured of change for being configured to time division duplex in LTE；
Fig. 9 schematically shows the subframe diagram when previous configuration is TDD configuration 0；
A in Figure 10）,b ）,c ）And d）When schematically shown respectively for the reduction of HARQ process number, in uplink
The diagram of the embodiment that change in road for configuring to time division duplex in LTE is configured.
Specific embodiment
Embodiments of the present invention according to UE and eNB rule predetermined in the side UE by selectively being protected
Stay and abandon, thus effectively adaptation TDD configuration change, avoid HARQ postpone further extension, it is not necessary to data weight
It passes, and exception occurs to the management of HARQ process/buffer, while further improving the update of harq buffer device state
Speed, and shorten retransmission delay.
It is described the specific embodiments of the present invention in detail below in conjunction with attached drawing.
Firstly, defining following two scene.In scene 1, due to TDD configuration change, hybrid automatic repeat-request into
The quantity of journey increases, and unmatched HARQ will bring relatively slight influence to TDD eIMTA system, and in scene 2, mixing is certainly
The quantity of dynamic repeat request process is reduced, if unmatched HARQ will lead to the aobvious of system performance without being effectively adapted to
Write deterioration.
Scene 1：When the maximum HPN of previous configuration is less than or equal to the maximum HPN after reconfiguring, that is,
HPN_DL_pre≤HPN_DL_reconf
HPN_UL_pre≤HPN_UL_reconf
Wherein：
HPN_DL_pre：The DL maximum HPN value of previous configuration in TDD configuration；
HPN_DL_reconf：DL maximum HPN value after being reconfigured in TDD configuration；
HPN_UL_pre：The UL maximum HPN value of previous configuration in TDD configuration；
HPN_UL_reconf：UL maximum HPN value after being reconfigured in TDD configuration.
Scene 2：(a) when the maximum HPN of configuration previous in DL is greater than the maximum HPN after reconfiguring, that is, HPN_DL_
Pre > HPN_DL_reconf (for example, HPN_DL_pre=15, HPN_DL_reconf=9), and (b) match when previous in UL
When the maximum HPN set is greater than the maximum HPN after reconfiguring, that is, HPN_UL_pre > HPN_UL_reconf, (for example, HPN_
UL_pre=15, HPN_UL_reconf=9).
Fig. 1 schematically shows in the uplink for scene 2b) according to one embodiment of the present invention and is used for
To the flow chart for the method 100 that the change that time division duplex in LTE configures is configured.
As shown in Figure 1, in step s101, when the quantity of hybrid automatic repeat request process is reduced, for being reduced
Process (the HARQ process i in former frame, wherein i > HPN_UL_reconf), in response to receiving affirmative acknowledgement, release with
The corresponding hybrid automatic repeat request (HARQ) of the affirmative acknowledgement.Specifically, UE can discharge corresponding with the ACK upon receipt of the ack
HARQ process harq buffer device, rather than receive the new uplink authorization with identical HARQ process in the system and just release
Buffer is put, this enables quickly is handled since HPN mismatches extra data.
In step s 102, in response to receiving negative response, the automatic weight of mixing corresponding with the negative response is abandoned
Journey is come into, is retransmitted with trigger data.Specifically, when UE receives NACK, UE abandons HARQ process corresponding with the NACK
Data, with trigger upper layer (such as, MAC layer) data retransmit.For physical layer, using the data of discarding as new data
It retransmits, and for MAC, it is retransmitted as existing legacy data.This substantially reduces retransmission delay.One
It, can be according to scheduled rule come executing data retransmission in kind embodiment.
In scene 1, for UL, when UE is determined to ACK or NACK decoding error received from eNB, execution correct into
Journey.The correction process performs the following operations：If NACK is decoded into ACK by UE mistake, when UE receives the weight that eNB is sent
When passing uplink authorization, UE, which can determine, should be decoded into NACK, and trigger upper layer retransmissions immediately.If ACK is decoded by UE mistake
NACK, then when UE receive that eNB sends with identical HARQ process number for new data uplink authorization when, UE can be true
Surely it should be decoded into ACK, and discharge corresponding HARQ processing in harq buffer device immediately.It ensure that normal in uplink
Processing.
In one embodiment, when UE receives ACK, UE can discharge harq buffer by following two mode
Device：(1) corresponding harq buffer device is directly discharged；And (2) have being directed to newly for identical HARQ process number until receiving
The uplink authorization (UL-grant) of data just discharges.In addition, when UE receives NACK, it is corresponding with the NACK by retaining
The data of HARQ process, to merge for the data with later retransmission.
Although being not shown in the figure, in one embodiment, the HARQ that preferentially number in former frame is remained unchanged
Process i (wherein, i≤HPN_UL_reconf) (for example, i≤9) executes adaptation, in the decoding error for ACK or NACK,
Correction process is executed, also, when the decoding for NACK is correct, retains mixing corresponding with the negative response being correctly decoded
Automatic repeat request (HARQ), to carry out the re-transmission of physical layer.The re-transmission of the physical layer be executed via scheduled mapping ruler it is described
The re-transmission of physical layer.
And when the HARQ process i (wherein, i > HPN_UL_reconf) (that is, increased process) in former frame is (for example, 9
I≤15 <) when, directly the data in the harq buffer device of UE can be abandoned, and wait the new scheduling to initial data.
Fig. 2 schematically shows be used in the uplink for scene 2b) according to one embodiment of the present invention
To the flow chart for the method 200 that the change that time division duplex in LTE configures is configured.As shown in Fig. 2, in step s 201,
When the quantity of hybrid automatic repeat request process is reduced, in response to receiving affirmative acknowledgement, discharge corresponding with the affirmative acknowledgement
Hybrid automatic repeat request (HARQ).Specifically, upon receipt of the ack, UE will discharge the harq buffer device of corresponding HARQ processing i
(wherein, 1≤i≤HPN_DL_pre).
In step S202, in response to receiving negative response, retain the automatic weight of mixing corresponding with the negative response
The data in request process are passed, to execute the re-transmission of physical layer.Specifically, when UE, which is flanked, receives NACK, UE will be received
Data are retained in the harq buffer device of HARQ process i corresponding with the NACK, and are held via scheduled mapping ruler
The data of row physical layer retransmit.
The scheduled mapping ruler for example can be, and will be fed back to NACK (example in set { 1,2 ..., HPN_UL_pre }
Such as, { 1,2 ..., 15 }) HARQ process be mapped in a recursive manner set { 0 ..., HPN_UL_reconf } (for example,
{ 0 ..., 9 }) in the HARQ process (mapping ruler I) discharged.This is eliminated based on the PUSCH given in TDD eIMTA
The scheduling timing uplink authorization timing of sub-frame of uplink (for example, in frame after reconfiguring) come the HARQ that is being retransmitted into
Journey.The mapping can be carried out according to the sequence of sending time, that is, the first re-transmission first sent.It can also be indexed according to HARQ process
Sequence mapped.
In yet another embodiment, it is preferentially directed to for HARQ process i (wherein, i≤HPN_UL_reconf)
The data processing (will describe later) of scene 1, and it is directed to HARQ process i (wherein, HPN_UL_reconf < i≤HPN_UL_
Pre), upon receipt of the ack, UE soon discharges harq buffer device corresponding with the ACK, and when the nack is received, UE
The data that physical layer is carried out via mapping ruler III retransmit.Alternatively, it is directed to HARQ process i (wherein, i≤HPN_UL_pre),
Upon receipt of the ack, UE soon discharges harq buffer device corresponding with the ACK, and when the nack is received, and UE is via reflecting
Rule III is penetrated to carry out the data of physical layer and retransmit.
For DL, in one embodiment, as the HARQ process i (wherein, i≤HPN_DL_reconf) in former frame
When (for example, i≤9), executes data and retain.And when HARQ process i (wherein, i > HPN_DL_reconf) (example in former frame
Such as, 9 i≤15 <) (that is, the process being reduced) when, directly the data in the harq buffer device of UE can be abandoned, and waited
New scheduling to initial data.Alternatively, the harq buffer device of the releasable corresponding HARQ process i of UE being correctly decoded, and eNB
It only needs to be scheduled the data of decoded in error.Then, the decoded data of HARQ error are abandoned.Correctness is decoded for eNB
Judgement it is identical as process described above.
Fig. 3 is shown when the side eNB according to one embodiment of the present invention is reduced for HARQ process number in downlink
In the flow chart of method 300 that is configured of change for being configured to time division duplex in LTE.In step S301, mixing
When the quantity of automatic repeat request process is reduced, for the process being reduced, the mixed automatic retransfer that user equipment abandons is determined
Process.In step s 302, data corresponding with the hybrid automatic repeat request (HARQ) are abandoned, and trigger number in step S303
According to re-transmission.
In another embodiment, after corresponding PDSCH is correctly decoded, UE will discharge corresponding HARQ processing i
Harq buffer device (wherein, 1≤i≤HPN_DL_pre).And for the HARQ process being incorrectly decoded received by the side UE
The data received are retained in the harq buffer device of corresponding HARQ process i by i, UE, and pending datas is waited to retransmit, to be used for
Data are retransmitted via new mapping ruler.
In downlink when the side eNB that Fig. 4 shows another embodiment according to the present invention is reduced for HARQ process number
In the flow chart of method 400 that is configured of change for being configured to time division duplex in LTE.In step S401, mixing
When the quantity of automatic repeat request process is reduced, determine mixed automatic retransfer that user equipment is retained for negative response into
Journey.In step S402, to the data in the hybrid automatic repeat request (HARQ) retained, the re-transmission of physical layer is executed.
New mapping ruler for example can be, will be fed back in set { 1,2 ..., HPN_DL_pre } NACK (for example,
{ 1,2 ..., 15 }) HARQ process be mapped in a recursive manner set { 0 ..., HPN_DL_reconf } (for example,
{ 0 ..., 9 }) in available HARQ process (mapping ruler II).The mapping can be carried out according to the sequence of sending time, that is, first
The first re-transmission sent.It can also be mapped according to the sequence of HARQ process index.
New mapping ruler, which is for example also possible that, is fed back to NACK in set { 1,2 ..., HPN_DL_reconf }
The HARQ process of (for example, { 1,2 ..., 9 }), with high priority come follow above-mentioned selectable data retain in re-transmission at
Reason, and for set { HPN_DL_reconf+1 ..., HPN_DL_pre } in be fed back to NACK process (for example,
{ 10 ..., 15 }), it then follows above-mentioned mapping ruler (mapping ruler III).In various embodiments above, UE executes pre- with eNB
The regular corresponding operation first defined.
In addition, in one embodiment, when occurring abnormal, the data in the harq buffer device of UE can be directly abandoned,
Also, wait new scheduling.
In addition, being directed to DL, UE will discharge the harq buffer device of normal decoded HARQ process, also, retain decoded in error
HARQ process, to be combined for the data with later retransmission.What this was related to whether being correctly decoded the ACK/NACK of eNB
Judgement.If ACK is decoded into NACK by eNB mistake, the re-transmissions of the data that UE has discharged before receive that eNB sends is directed into
When journey, it may be determined that eNB decoding error, then UE sends ACK to eNB, so that it is guaranteed that subsequent processing is normally carried out.If eNB
NACK is decoded into ACK by mistake, and UE remains in UE in the HARQ process number for finding the new data of received eNB transmission and currently
When HARQ process number in the buffer of side is identical, it may be determined that eNB decoding error, then UE will discharge corresponding with the data
The buffer of HARQ process number waits upper layer Retransmission timeout because eNB is not sent further on the re-transmission for the data, thus
Ensure being normally carried out for subsequent processing.
Method 100 can equipment 500 as shown in Figure 5 execute.Fig. 5 shows according to one embodiment of the present invention upper
The block diagram for the equipment 500 that change in line link for configuring to time division duplex in LTE is configured.The equipment 500 includes the
One processing unit 501 is configured as, for the process being reduced, ringing when the quantity of hybrid automatic repeat request process is reduced
Ying Yu receives affirmative acknowledgement, discharges hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement.First processing unit is also
It is configured to respond to receive negative response, abandons hybrid automatic repeat request (HARQ) corresponding with the negative response, with triggering
Data retransmit.
Equipment 500 further includes second processing device, is configured as in the quantity increase of hybrid automatic repeat request process,
When for the decoding error of affirmative acknowledgement or negative response, correction process is executed.The second processing device is additionally configured to
When the quantity of hybrid automatic repeat request process increases, when for the decoding error of affirmative acknowledgement or negative response, school is executed
Positive process, and when the decoding for negative response is correct, retain mixing corresponding with the negative response being correctly decoded certainly
Dynamic retransmission process.
In addition, equipment 500 further includes that third processing unit is configured as increasing in the quantity of hybrid automatic repeat request process
Added-time, preferentially be directed to not increased process number, when for the decoding error of affirmative acknowledgement or negative response, execution correct into
Journey, and when the decoding for negative response is correct, retain the automatic weight of mixing corresponding with the negative response being correctly decoded
Come into journey.
Equipment 500 further includes fourth process device, is configured as increased process number, in response to receiving affirmative
Response, discharges corresponding with affirmative acknowledgement hybrid automatic repeat request (HARQ), and in response to receiving negative response, retain and
Data in the corresponding hybrid automatic repeat request process of the negative response, to execute the re-transmission of physical layer.
Method 200 can equipment 600 as shown in Figure 6 execute.Fig. 6, which is shown, a kind of to be changed time division duplex configuration in LTE
Become the equipment 600 being adapted to.The equipment 600 includes release device 601, is configured as in hybrid automatic repeat request process
When quantity is reduced, in response to receiving affirmative acknowledgement, hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement is discharged.This sets
Standby further includes retaining device 602, is configured to respond to receive negative response, retains mixing corresponding with the negative response
Data in automatic repeat request process, to execute the re-transmission of physical layer.
Method 300 can equipment 700 as shown in Figure 7 execute.Fig. 7, which is shown, a kind of to be changed time division duplex configuration in LTE
Become the equipment being adapted to.The equipment 700 includes the first determining device 701, is configured as in hybrid automatic repeat request process
Quantity when reducing, for the process being reduced, determine the hybrid automatic repeat request (HARQ) that user equipment abandons；Drop device 702,
It is configured as abandoning data corresponding with the hybrid automatic repeat request (HARQ)；And trigger device 703, it is configured as triggering number
According to re-transmission.
Method 400 can equipment 800 as shown in Figure 8 execute.Fig. 8, which is shown, a kind of to be changed time division duplex configuration in LTE
Become the equipment 800 being adapted to.The equipment 800 include the second determining device 801, be configured as hybrid automatic repeat-request into
When the quantity of journey is reduced, determine that user equipment is directed to the hybrid automatic repeat request (HARQ) and retransmission arrangement that negative response is retained
802, it is configured as executing the data in the hybrid automatic repeat request (HARQ) retained the re-transmission of physical layer.
In addition, in one embodiment, if uplink configuration applies TTI binding before, i.e., several UL combinations
A HARQ process number is used together, then is abandoned all data in the harq buffer device of the side UE, and then wait for
Layer retransmits.And in another embodiment, for the situation of TTI binding, it is slow to abandon HARQ corresponding with NACK is received
Rush the data in device.In various embodiments above, eNB be can be performed and UE regular corresponding operation predetermined.
In addition, Fig. 9 schematically shows the subframe diagram when previous configuration is TDD configuration 0.As shown in figure 9, when previous
When TDD configuration is configuration 0 and is reconfigured as new configuration, that is, previous T DD is configured to be configured with the TDD after reconfiguring
Configuration to for (0,1), (0,2), (0,3), (0,4), UL subframe #2 and #3 on (0,5) and (0,6), such as configuration 0
Two HARQ processes on (or #8 and #9) will be fed back on the DL subframe #0 (or #5) of the frame reconfigured on configuration 1-6.
If two HARQ processes all receive NACK (for example, passing through IPHICH=0 or IPHICH=1 distinguishes), then it will be respectively in son
It is retransmitted on frame #4 and #7 (or next subframe #9 or #12).But in the uplink, configuration 1-6 is synchronized at HARQ
Reason, thus, the scene is coped with without corresponding standard or specification.
Therefore, in the present embodiment, if only one in two HARQ processes has received NACK, adopt with it is above-mentioned
The identical processing mode of embodiments of the present invention.On the other hand, if two HARQ processes all have received NACK, that is, all
Need to retransmit, then selectively abandon one of HARQ process (for example, HPN index it is big or HPN index it is small, or
Person's sending time is preceding or sending time is posterior), and then wait for upper layer retransmissions.If in two HARQ processes
One receives ACK, another receives NACK, then abandons HARQ process corresponding with NACK is received, and then etc.
To upper layer retransmissions.This simple and effective mechanism is ensured can solve the problems, such as resource contention under special case.
Specific example is given below further to illustrate the present invention.
A in Figure 10）,b）,c）And d）When schematically shown respectively for the reduction of HARQ process number, use in the uplink
The diagram of the embodiment that the change that time division duplex configures in LTE is configured.As in Figure 10 a) shown in, when TDD matches
It sets when becoming maximum the configuration 2 that HPN value is 2 from the configuration 6 that maximum HPN value is 5, for the frame after reconfiguring, HARQ
Process ID 3,4 and 5 is nonsensical.In this example, it is assumed that UL subframe #2, #3, #4, #7 and the # of not changed frame
8 HARQ feedback is NACK, NACK, ACK, NACK and ACK.In addition, to put it more simply, for new data it is initial send or again
Pass reconfigure after frame in UL subframe scheduling timing follow configuration 2 scheduling timing.Due to frame after relocation
UL subframe on without correct uplink authorization, therefore, UL on the frame, which is transmitted, to be increased.
Based on these it is assumed that b in Figure 10) show the side UE harq buffer device state, wherein all HARQ processes
Data be all dropped, thus buffer is empty.This is the processing in order to be carried out when abnormal to appearance.
C in Figure 10) show a kind of embodiment in scene 2 in uplink, wherein and HARQ process number is greater than
2 be dropped, and the process of HPN=1 is retained.Also, works as and receive the new data uplink authorization with identical HPN
When, corresponding HARQ process will be released.
D in Figure 10) show the scheme that physical layer retransmission is realized using new mapping ruler, wherein when UE is received
When to ACK, the HARQ process of HPN=1 and 3 is released, also, the HARQ process of HPN=4,5 and 2 will be in available UL subframe
It is then retransmitted sequentially in time on (for example, subframe #7 of the frame after reconfiguring in this example).For sake of simplicity, save herein
Other combinations of the different processes of HARQ process, such as { 1,2 } and { 3,4,5 } are omited.The present invention can accelerate harq buffer device shape
The update of state, also, retransmission delay can be shortened, this is extremely important for keeping the key performance of eIMTA.
To sum up, each embodiment of the invention is described in detail in conjunction with attached drawing.Those skilled in the art can
With understand embodiments of the present invention can by hardware, software, firmware, module or its in conjunction with realizing, can also supply
The present invention is embodied on the signal bearing medium that any suitable data processing system uses in set computer program product.This
Kind signal bearing medium can be transmission medium or the recordable media for machine sensible information, including magnetic medium, optical medium
Or other suitable medias.The example of recordable media includes：Disk or floppy disk in hard disk drive, for CD-ROM drive CD,
Other thinkable media of tape and those skilled in the art institute.One skilled in the art would recognize that having suitable compile
Any communication terminal of range device will all execute the step of the method for the present invention as embodied in program product.
It should be noted that in order to make the present invention easier to understand, above description is omitted for those skilled in the art
For be well known and more specific some technical details may be necessary for realization of the invention.
Although it is disclosed that only certain exemplary embodiments of this invention, but it will be appreciated by those skilled in the art that can be for specific
Embodiment makes a change without departing from the spirit and scope of the present invention.Therefore, the present invention is not limited to specific embodiment,
And appended claims include any and all such applications in the scope of the invention, modification and implementation.
Claims (35)
1. the method that the change that time division duplex configures in a kind of couple of LTE is adapted to, including：
When the quantity of hybrid automatic repeat request process is reduced, for the process being reduced：
In response to receiving affirmative acknowledgement, hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement is discharged；And
In response to receiving negative response, hybrid automatic repeat request (HARQ) corresponding with the negative response is abandoned, to trigger number
According to re-transmission, wherein retransmitting data via scheduled mapping ruler.
2. according to the method described in claim 1, further including：
When the quantity of hybrid automatic repeat request process increases, when for the decoding error of affirmative acknowledgement or negative response,
Execute correction process；And
When the decoding for negative response is correct, retain mixed automatic retransfer corresponding with the negative response being correctly decoded
Process.
3. according to the method described in claim 1, further including：
When the quantity of hybrid automatic repeat request process increases, for the process that remains unchanged of number：
When for the decoding error of affirmative acknowledgement or negative response, correction process is executed；And
When the decoding for negative response is correct, retain mixed automatic retransfer corresponding with the negative response being correctly decoded
Process.
4. according to the method described in claim 3, further including：
For increased process：
In response to receiving affirmative acknowledgement, hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement is discharged；And
In response to receiving negative response, retain the number in hybrid automatic repeat request process corresponding with the negative response
According to execute the re-transmission of physical layer.
5. according to the method described in claim 4, wherein executing the re-transmission of the physical layer via scheduled mapping ruler.
6. according to the method described in claim 5, wherein in a recursive manner, corresponding with the negative response received will mix
It closes automatic repeat request process and is mapped to hybrid automatic repeat-request in the process that number remains unchanged, being released
Process, to execute the re-transmission of the physical layer.
7. according to the method described in claim 6, wherein according to the sequence or hybrid automatic repeat request process rope of sending time
The sequence drawn, to execute the re-transmission of the physical layer.
8. according to the method described in claim 1, abandoning mixed automatic retransfer wherein when application transport time interval is bound and asking
Seek all data in buffer.
9. according to the method described in claim 1, wherein when application transport time interval is bound, the negative that abandons and receive
Data in the corresponding hybrid automatic repeat-request buffer of response.
10. according to the method described in claim 1, duplex configuration is wherein divided to be when configuring 0, when after the change at the beginning
Two hybrid automatic repeat-requests corresponding with the negative response received are existed simultaneously in the same subframe for being divided to duplex to configure
When process, one of hybrid automatic repeat request process is abandoned.
11. according to the method described in claim 1, duplex configuration is wherein divided to be when configuring 0, when after the change at the beginning
One of hybrid automatic repeat request process in the same subframe of duplex configuration is divided to receive affirmative acknowledgement, another mixing
When automatic repeat request process receives negative response, abandons mixed automatic retransfer corresponding with the negative response received and ask
Seek process.
12. the method that the change that time division duplex configures in a kind of couple of LTE is adapted to, including：
When the quantity of hybrid automatic repeat request process is reduced, in response to receiving affirmative acknowledgement, release is answered certainly with described
Answer corresponding hybrid automatic repeat request (HARQ)；And
In response to receiving negative response, retain the number in hybrid automatic repeat request process corresponding with the negative response
According to execute the re-transmission of physical layer, wherein executing the re-transmission of the physical layer via scheduled mapping ruler.
13. the method according to claim 11, wherein in a recursive manner, it will be corresponding with the negative response received
Hybrid automatic repeat request process is mapped to mixed automatic retransfer in the process that number remains unchanged, being released and asks
Process is sought, to execute the re-transmission of the physical layer.
14. according to the method for claim 13, wherein the sequence or hybrid automatic repeat request process of foundation sending time
The sequence of index, to execute the re-transmission of the physical layer.
15. the equipment that the change that time division duplex configures in a kind of couple of LTE is adapted to, including：
First processing unit is configured as when the quantity of hybrid automatic repeat request process is reduced, for the process being reduced：
In response to receiving affirmative acknowledgement, hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement is discharged；And
In response to receiving negative response, hybrid automatic repeat request (HARQ) corresponding with the negative response is abandoned, to trigger number
According to re-transmission, wherein retransmitting data via scheduled mapping ruler.
16. equipment according to claim 15 further includes second processing device, the second processing device is configured as
When the quantity of hybrid automatic repeat request process increases,
When for the decoding error of affirmative acknowledgement or negative response, correction process is executed；And
When the decoding for negative response is correct, retain mixed automatic retransfer corresponding with the negative response being correctly decoded
Process.
17. equipment according to claim 15 further includes third processing unit, the third processing unit is configured as
When the quantity of hybrid automatic repeat request process increases, the process that is remained unchanged for number：
When for the decoding error of affirmative acknowledgement or negative response, correction process is executed；And in the solution for negative response
When code is correct, retain hybrid automatic repeat request (HARQ) corresponding with the negative response being correctly decoded.
18. equipment according to claim 17 further includes fourth process device, the fourth process device is configured as needle
To increased process number：
In response to receiving affirmative acknowledgement, hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement is discharged；And
In response to receiving negative response, retain the number in hybrid automatic repeat request process corresponding with the negative response
According to execute the re-transmission of physical layer.
19. equipment according to claim 18, wherein executing the re-transmission of the physical layer via scheduled mapping ruler.
20. equipment according to claim 19, wherein in a recursive manner, it will be corresponding with the negative response received
Hybrid automatic repeat request process is mapped to mixed automatic retransfer in the process that number remains unchanged, being released and asks
Process is sought, to execute the re-transmission of the physical layer.
21. equipment according to claim 20, wherein sequence or hybrid automatic repeat request process according to sending time
The sequence of index, to execute the re-transmission of the physical layer.
22. equipment according to claim 15, wherein what is abandoned and receive is no in the binding of application transport time interval
Determine the data in the corresponding hybrid automatic repeat-request buffer of response.
23. equipment according to claim 15, wherein when to divide duplex configuration at the beginning be configuration 0, when after the change
Two mixed automatic retransfers corresponding with the negative response received are existed simultaneously in the same subframe of time division duplex configuration to ask
When seeking process, one of hybrid automatic repeat request process is abandoned.
24. equipment according to claim 15, wherein when to divide duplex configuration at the beginning be configuration 0, when after the change
One of hybrid automatic repeat request process in the same subframe of time division duplex configuration receives affirmative acknowledgement, another is mixed
When conjunction automatic repeat request process receives negative response, mixed automatic retransfer corresponding with the negative response received is abandoned
Request process.
25. the equipment that the change that time division duplex configures in a kind of couple of LTE is adapted to, including：
Release device is configured as when the quantity of hybrid automatic repeat request process is reduced, in response to receiving affirmative acknowledgement,
Discharge hybrid automatic repeat request (HARQ) corresponding with the affirmative acknowledgement；And
Retaining device is configured to respond to receive negative response, and it is automatic to retain mixing corresponding with the negative response
Data in repeat request process, to execute the re-transmission of physical layer, wherein executing the physics via scheduled mapping ruler
The re-transmission of layer.
26. equipment according to claim 25, wherein in a recursive manner, it will be corresponding with the negative response received
Hybrid automatic repeat request process is mapped to mixed automatic retransfer in the process that number remains unchanged, being released and asks
Process is sought, to execute the re-transmission of the physical layer.
27. equipment according to claim 26, wherein sequence or hybrid automatic repeat request process according to sending time
The sequence of index, to execute the re-transmission of the physical layer.
28. the method that the change that time division duplex configures in a kind of couple of LTE is adapted to, including：
When the quantity of hybrid automatic repeat request process is reduced, for the process being reduced：
Determine the hybrid automatic repeat request (HARQ) that user equipment abandons；
Abandon data corresponding with the hybrid automatic repeat request (HARQ)；And
Trigger data retransmits, wherein retransmitting data via scheduled mapping ruler.
29. the method that the change that time division duplex configures in a kind of couple of LTE is adapted to, including：
When the quantity of hybrid automatic repeat request process is reduced, determine mixing that user equipment is retained for negative response from
Dynamic retransmission process；And
To the data in the hybrid automatic repeat request (HARQ) retained, the re-transmission of physical layer is executed, wherein advising via scheduled mapping
Then execute the re-transmission of the physical layer.
30. the method according to claim 11, wherein in a recursive manner, it will be corresponding with the negative response received
Hybrid automatic repeat request process is mapped to hybrid automatic repeat-request in the process that number remains unchanged, being released
Process, to execute the re-transmission of the physical layer.
31. according to the method for claim 30, wherein the sequence or hybrid automatic repeat request process of foundation sending time
The sequence of index, to execute the re-transmission of the physical layer.
32. the equipment that the change that time division duplex configures in a kind of couple of LTE is adapted to, including：
First determining device is configured as when the quantity of hybrid automatic repeat request process is reduced, for the process being reduced,
Determine the hybrid automatic repeat request (HARQ) that user equipment abandons；
Drop device is configured as abandoning data corresponding with the hybrid automatic repeat request (HARQ)；And
Trigger device is configured as trigger data re-transmission, wherein retransmitting data via scheduled mapping ruler.
33. the equipment that the change that time division duplex configures in a kind of couple of LTE is adapted to, including：
Second determining device is configured as determining that user equipment is directed to when the quantity of hybrid automatic repeat request process is reduced
The hybrid automatic repeat request (HARQ) that negative response is retained；And
Retransmission arrangement is configured as executing the data in the hybrid automatic repeat request (HARQ) retained the re-transmission of physical layer, wherein
The re-transmission of the physical layer is executed via scheduled mapping ruler.
34. equipment according to claim 33, wherein in a recursive manner, it will be corresponding with the negative response received
Hybrid automatic repeat request process is mapped to hybrid automatic repeat-request in the process that number remains unchanged, being released
Process, to execute the re-transmission of the physical layer.
35. equipment according to claim 34, wherein sequence or hybrid automatic repeat request process according to sending time
The sequence of index, to execute the re-transmission of the physical layer.
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