CN104579592B - The many subframe scheduling ACK/NACK feedback schemes of FDD - Google Patents
The many subframe scheduling ACK/NACK feedback schemes of FDD Download PDFInfo
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- CN104579592B CN104579592B CN201310493000.5A CN201310493000A CN104579592B CN 104579592 B CN104579592 B CN 104579592B CN 201310493000 A CN201310493000 A CN 201310493000A CN 104579592 B CN104579592 B CN 104579592B
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Abstract
Present invention is disclosed the ACK/NACK feedback methods of the descending many subframe schedulings of FDD and system.The core concept of the present invention is the PUCCH resource of feeding back ACK/NACK when eNB is specially configured to descending many subframe schedulings for UE in the uplink spectrum of each subframe.A solution is to configure PUCCH resource in the uplink spectrum of each subframe for each UE；It is that multiple UE configure multiple or multiple gourp sharing PUCCH resources in the uplink spectrum of each subframe that another solution, which is, and then PUCCH resource instructions field is used to refer to one of them or one group of PUCCH resource defined in the PDCCH of row subframe in each of the lower；So as to the ACK/NACK of many subframe schedulings of feeding back downlink in the PUCCH resource of special configuration.So, there is PUCCH resource conflict when being avoided that the ACK/NACK that many subframe schedulings are fed back in FDD.
Description
Technical field
The invention belongs to wireless communication technology field, it is related to the ACK/NACK feedback schemes of the descending many subframe schedulings of FDD.
Background technology
Long Term Evolution (LTE) system defines FDD (Frequency Division Duplexing, FDD) simultaneously
With time division duplex (Time Division Duplexing, TDD) two ways.Two independent channels are needed when FDD is operated.
One channel is used for transmission information downwards, and one other channel is used for being passed up information.There is a protection between two channels
Frequency range.
In LTE Rel-8/9/10/11, what it is for the use of descending dynamic service is all list frame scheduling, i.e., in a son
The Physical Downlink Shared Channel of frame in（PDSCH）By the Physical Downlink Control Channel of present sub-frame（PDCCH）Scheduling.In Rel-12
In, cell enhancing project verification is introduced, for small cell scenario, multiple subframes are dispatched using the PDCCH of many subframe schedulings, i.e., 1
PDSCH.This mode can reduce the expense of control signaling, improve spectrum efficiency.Many subframe schedulings（I.e. 1 PDCCH scheduling is more
The PDSCH or PUSCH of individual subframe）As shown in figure 1, some problems are also brought along in the case where reducing control signaling expense, it is special
It is not PUCCH feedback resources aspect.
For FDD, feeding back ACK/NACK PUCCH resource is determined by PDCCH starting CCE.But under UE progress
During many subframe schedulings of row, there is a PDCCH due to only having in the first of many subframe schedulings subframe, so for other subframes,
Such as the subframe 2,3 and 4 in Fig. 1, do not have corresponding PDCCH in the downstream spectrum of these subframes, therefore its is anti-
Feedback ACK/NACK PUCCH resource can not just be determined according to its PDCCH starting CCE.If according to rising for the PDCCH of subframe 1
Beginning CCE determines that the feeding back ACK/NACK thereby determined that PUCCH resource may also be distributed to other UE by eNB, this generates
PUCCH resource conflict, now, eNB, eNB can not be transferred in the ACK/NACK of subframe 2,3 and 4 by carrying out the UE of many subframe schedulings
It can not judge whether the data for being sent to UE are correct, therefore cause the destruction of whole communication link.
The content of the invention
（One）The technical problem to be solved
The technical problem to be solved of the present invention can when being and how to avoid feeding back the ACK/NACK of many subframe schedulings in fdd
The conflict for the PUCCH resource that can trigger.
（Two）Technical scheme
In order to solve the above technical problems, according to the first aspect of the invention, it is proposed that a kind of descending many subframe schedulings of FDD
ACK/NACK feedback methods, including：
The high level of base station eNB is that each terminal UE configures a Physical Uplink Control Channel in the uplink spectrum of each subframe
PUCCH resource；
When UE receives eNB descending many subframe scheduling mandates, in scheduled many subframes, for sending what is authorized
Subframe, the UE uses the physical downlink control channel PDCCH of the subframe authorized by the transmission in the uplink spectrum of corresponding subframe
The PUCCH resource that initial control channel unit CCE is indicated feeds back the Physical Downlink Shared Channel PDSCH of the subframe of the transmission mandate
ACK/NACK；For without the subframe authorized is sent, UE uses the PUCCH configured for the UE in the uplink spectrum of corresponding subframe
Resource feeds back its PDSCH ACK/NACK.
According to the second aspect of the invention, it is proposed that a kind of ACK/NACK feedback methods of the descending many subframe schedulings of FDD, its
It is characterised by, including：
The high level of base station eNB is that multiple UE configure multiple or multiple gourp sharing PUCCH in the uplink spectrum of each subframe
Resource, is that each UE configures a PUCCH resource instructions field in the Downlink Control Information DCI of each subframe.
The high level of base station eNB is that one of UE sends many subframe scheduling mandates, uses the PUCCH resource configured for the UE
Instructions field indicates one of them or one group of PUCCH resource；
When receiving descending many subframe scheduling mandates, UE last scheduled subframe corresponding subframe it is up
The PUCCH resource that frequency spectrum is currently indicated using the PUCCH resource instructions field of the UE feeds back the PDSCH's of scheduled all subframes
ACK/NACK。
Preferably, this method also includes：
The size of the PUCCH resource instructions field is n-bit, and the number or group number of the shared PUCCH resource are little
In 2n。
Preferably, this method also includes：
The size of the PUCCH resource instructions field is 2 bits, and the number or group number of the shared PUCCH resource are 4.
Preferably, this method also includes：
The high-rise of eNB needs dynamic configuration to be used for the sub-frame number of many subframe schedulings according to business.
According to the third aspect of the invention we, it is proposed that a kind of ACK/NACK reponse systems of the descending many subframe schedulings of FDD, should
System includes base station eNB and multiple terminal UEs：
The eNB, its high level configures a Physical Uplink Control Channel for each UE in the uplink spectrum of each subframe
PUCCH resource；
The UE, when receiving descending many subframe scheduling mandates, in scheduled many subframes, for sending what is authorized
Subframe, the initial control of the physical downlink control channel PDCCH of the subframe authorized in the uplink spectrum of corresponding subframe using the transmission
The PUCCH resource that Channel Elements CCE processed is indicated feeds back the Physical Downlink Shared Channel PDSCH of the subframe of transmission mandate ACK/
NACK；For without the subframe authorized is sent, using the PUCCH resource configured for the UE to feed back in the uplink spectrum of corresponding subframe
Its PDSCH ACK/NACK.
According to the fourth aspect of the invention, it is proposed that a kind of ACK/NACK reponse systems of the descending many subframe schedulings of FDD, should
System includes base station eNB and multiple terminal UEs：
The eNB, its high level is that multiple UE configure multiple or multiple gourp sharing PUCCH in the uplink spectrum of each subframe
Resource, and be that each UE configures a PUCCH resource instructions field in the Downlink Control Information DCI of each subframe, when for wherein
When one UE sends many subframe scheduling mandates, one of them or one group are indicated using for the PUCCH resource instructions field that the UE is configured
PUCCH resource；
The UE, when receiving descending many subframe scheduling mandates, in the corresponding subframe of last scheduled subframe
The PUCCH resource that is currently indicated using its PUCCH resource instructions field of uplink spectrum feed back the PDSCH of scheduled all subframes
ACK/NACK.
Preferably, this method also includes：
The size of the PUCCH resource instructions field is n-bit, and the number or group number of the shared PUCCH resource are little
In 2n。
Preferably, the size of the PUCCH resource instructions field is 2 bits, the number or group of the shared PUCCH resource
Number is 4.
Preferably, the eNB, its high level needs the sub-frame number of many subframe schedulings of dynamic configuration according to business.
（Three）Beneficial effect
The present invention is used for the ACK/ of descending many subframe schedulings by the uplink spectrum in each subframe for terminal special configuration
The PUCCH resource of NACK feedbacks, so that the PUCCH resource conflict that can trigger when solving the ACK/NACK for transmitting many subframe schedulings
Problem.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only some of the present invention
Embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can also be attached according to these
Figure obtains other accompanying drawings.
Fig. 1 is the schematic diagram of many subframe schedulings of prior art.
Fig. 2 is the ACK/NACK feedback methods of the descending many subframe schedulings of FDD according to a preferred embodiment of the present invention
Flow chart.
Fig. 3 is the schematic diagram of many subframe scheduling windows of FDD of the present invention, is scheduling window wherein in dotted line frame.
Embodiment
Embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples.Following examples are only used
In the explanation present invention, and it can not be used for limiting the scope of the present invention.
It should be noted that for brevity, the ins and outs illustrated for embodiment before, after
It may will not be described in great detail in embodiment；Conversely, the ins and outs illustrated in embodiment afterwards, embodiment before may also not have
It is described.As long as it will be understood by those skilled in the art that not constituting conflict, the ins and outs of one embodiment description are similarly
Suitable for further embodiment.
The core concept of the present invention is that eNB is specially configured to descending many subframes for UE in the uplink spectrum of each subframe
Feeding back ACK/NACK PUCCH resource during scheduling.A solution is to match somebody with somebody for each UE in the uplink spectrum of each subframe
Put PUCCH resource；It is that multiple UE configure multiple or multiple gourp sharing in the uplink spectrum of each subframe that another solution, which is,
PUCCH resource, be then that each UE defines the PUCCH instructions field of n-bit to indicate it in the PDCCH of row subframe in each of the lower
In one or one group of PUCCH resource；So as to the ACK/ of many subframe schedulings of feeding back downlink in the PUCCH resource resource of special configuration
NACK。
Illustrate the first scheme first.In fdd, for the Physical Downlink Control Channel PDSCH of each subframe, be by
According to n+4 sequential, in uplink spectrum feeding back ACK/NACK of corresponding subframe, i.e., the uplink spectrum of the 4th subframe after the subframe
Feeding back ACK/NACK.According to the preferred embodiment of the present invention, eNB high level is uplink spectrums of each UE in each subframe
Configure a PUCCH resource；Then when UE receives descending many subframe scheduling mandates, in scheduled many subframes, for
The subframe authorized is sent, uses the PDCCH of the subframe authorized by the transmission initial control to believe in the uplink spectrum of corresponding subframe
The PUCCH resource that road unit CCE is indicated feed back the PDSCH of the subframe of transmission mandate ACK/NACK, for not sending out
The subframe of mandate is sent, the ACK/ that its PDSCH is fed back for the UE PUCCH resources configured is used in the uplink spectrum of corresponding subframe
NACK.Provide that corresponding subframe refers to the 4th subframe after each descending sub frame here according to existing FDD.
This scheme of correspondence, it is proposed that a kind of ACK/NACK reponse systems of the descending many subframe schedulings of FDD, in an implementation
In example, the system includes base station eNB and multiple terminal UEs：
The eNB, its high level configures a Physical Uplink Control Channel for each UE in the uplink spectrum of each subframe
PUCCH resource；
The UE, when receiving descending many subframe scheduling mandates, in scheduled many subframes, for sending what is authorized
Subframe, the initial control of the physical downlink control channel PDCCH of the subframe authorized in the uplink spectrum of corresponding subframe using the transmission
The PUCCH resource that Channel Elements CCE processed is indicated feeds back the Physical Downlink Shared Channel PDSCH of the subframe of transmission mandate ACK/
NACK；For without the subframe authorized is sent, using the PUCCH resource configured for the UE to feed back in the uplink spectrum of corresponding subframe
Its PDSCH ACK/NACK.Those skilled in the art are it is recognised that the ins and outs and the first string of the system embodiment
Embodiment of the method is similar, therefore will not be repeated here.
The advantage of this allocation plan is can to reach many subframe scheduling highest flexibilities, can be descending at any one
The PDCCH of subframe transmits many subframe scheduling mandates, without causing PUCCH resource conflict.But have the disadvantage the PUCCH resource of configuration
It is more, though without downlink data transmission, PUCCH resource still need it is reserved, so as to cause PUCCH resource to waste.
In order to save PUCCH resource, it is proposed that another scheme.Below according to another preferred embodiment introduction of the present invention
Another ACK/NACK feedback methods of descending many subframe schedulings.This method includes：
In step S1, the shared PUCCH resource of configuration defines PUCCH resource instructions field.It is specific as follows：ENB is in every height
It is that multiple UE configurations are multiple or multigroup in the uplink spectrum of frame（1 group can represent 2,3,4 or more resources）It is shared
The PUCCH resource for being used to feed back the ACK/NACK of many subframe schedulings, and in each of the lower in the Downlink Control Information DCI of row subframe
The PUCCH resource instructions field of multiple bits is configured for each UE.
In step S2, one or one group of PUCCH resource are indicated using PUCCH resource instructions field.Specially：ENB is wherein
When one UE sends many subframe scheduling mandates, it will be set as that specific value is indicated for the PUCCH resource instructions field that the UE is configured
One of them or one group of PUCCH resource use for it.
In step S3, the ACK/NACK of many subframe schedulings is fed back using the PUCCH resource of instruction.Specially：It is descending when having
During many subframe schedulings, UE uses the PUCCH resource of the UE in the uplink spectrum of the corresponding subframe of last scheduled subframe
The PDSCH for all subframes that the PUCCH resource feedback that instructions field is currently indicated is scheduled ACK/NACK.Can define it is multiple under
Row subframe is scheduling window, and scheduling window is all subframes for same many subframe schedulings, and the size of scheduling window is sub in window
The quantity of frame needs dynamic configuration by eNB high level according to business, as shown in figure 3,1,2 and 3 size of scheduling window is respectively
2nd, 3 and 4.For the PDSCH of all subframes in scheduling window, its ACK/NACK is corresponding up by last subframe of scheduling window
Frequency spectrum feed back, i.e., after the subframe in the uplink spectrum feedback scheduling window of the 4th subframe all subframes ACK/NACK.
Preferably, if the size of PUCCH resource instructions field is n-bit, n is positive integer, then of preferred PUCCH resource
Number or group number are no more than 2n, so that one that the PUCCH resource instructions field of each PUCCH resource and n-bit is arranged out
Binary digit correspondence.Preferably, can be in DCI each UE define 2 bits PUCCH resource instructions field indicate use
PUCCH resource, and can to configure 4 or 4 groups of PUCCH resources in the uplink spectrum of subframe shared for some UE by eNB, by 2
The binary digit 00,01,10,11 that bit PUCCH resource instructions field is arranged out indicates respectively one of them or one group of PUCCH money
Source.
This scheme of correspondence, it is proposed that a kind of ACK/NACK reponse systems of the descending many subframe schedulings of FDD, in an implementation
In example, the system includes base station eNB and multiple terminal UEs：
The eNB, its high level is that multiple UE configure multiple or multiple gourp sharing PUCCH in the uplink spectrum of each subframe
Resource, and be that each UE defines a PUCCH resource instructions field in the Downlink Control Information DCI of each subframe, when for wherein
When one UE sends many subframe scheduling mandates, one of them or one group are indicated using for the PUCCH resource instructions field that the UE is configured
PUCCH resource；
The UE, when receiving descending many subframe scheduling mandates, in the corresponding subframe of last scheduled subframe
All sons of many subframe schedulings of PUCCH resource feeding back downlink for currently being indicated using its PUCCH resource instructions field of uplink spectrum
The PDSCH of frame ACK/NACK.
Preferably, the size of the PUCCH resource instructions field is n-bit, the number or group of the shared PUCCH resource
Number is not more than 2n.It is further preferred that the size of the PUCCH resource instructions field is 2 bits, the shared PUCCH resource
Number or group number are 4.And the eNB, the sub-frame number of its many subframe scheduling of high-rise energy dynamic regulation as needed.
Those skilled in the art are it is recognised that the embodiment of the method for the ins and outs of the system embodiment and second scheme
It is similar, therefore will not be repeated here.
Second scheme is when multiple UE are shared for many subframe schedulings by way of feeding back ACK/NACK PUCCH resource
PUCCH resource has preferably been saved, the service efficiency of PUCCH resource is improved.
Above example is merely to illustrate the present invention, rather than limitation of the present invention.Although with reference to embodiment to the present invention
It is described in detail, it will be appreciated by those persons skilled in the art that carrying out various groups to technical scheme
Close, change or equivalent substitution, without departure from the principle and spirit of the present invention, it all should cover in claim of the invention
Within protection domain.
Claims (10)
1. a kind of ACK/NACK feedback methods of the descending many subframe schedulings of FDD, it is characterised in that including：
The high level of base station eNB is that each terminal UE configures a Physical Uplink Control Channel in the uplink spectrum of each subframe
PUCCH resource；
When UE receives eNB descending many subframe scheduling mandates, in scheduled many subframes, for sending the son authorized
Frame, the UE uses the first of the physical downlink control channel PDCCH of the subframe authorized by the transmission in the uplink spectrum of corresponding subframe
The PUCCH resource that beginning control channel unit CCE is indicated feeds back the Physical Downlink Shared Channel PDSCH's of the subframe of the transmission mandate
ACK/NACK；For without the subframe authorized is sent, UE uses the PUCCH moneys configured for the UE in the uplink spectrum of corresponding subframe
Feed back its PDSCH ACK/NACK in source.
2. a kind of ACK/NACK feedback methods of the descending many subframe schedulings of FDD, it is characterised in that including：
The high level of base station eNB is that multiple UE configure multiple or multiple gourp sharing PUCCH resources in the uplink spectrum of each subframe,
It is that each UE configures one or one group of PUCCH resource instructions field in the Downlink Control Information DCI of each subframe；
The high level of base station eNB is that one of UE sends many subframe scheduling mandates, is indicated using the PUCCH resource configured for the UE
Domain indicates one of them or one group of PUCCH resource；
When receiving descending many subframe scheduling mandates, uplink spectrums of the UE in the corresponding subframe of last scheduled subframe
The PDSCH for all subframes that the PUCCH resource feedback currently indicated using the PUCCH resource instructions field of the UE is scheduled ACK/
NACK。
3. method according to claim 2, it is characterised in that this method also includes：
The size of the PUCCH resource instructions field is n-bit, and the number or group number of the shared PUCCH resource are not more than 2n。
4. method according to claim 3, it is characterised in that this method also includes：
The size of the PUCCH resource instructions field is 2 bits, and the number or group number of the shared PUCCH resource are 4.
5. the method according to any one of claim 2 to 4, it is characterised in that this method also includes：
The high-rise of eNB needs dynamic configuration to be used for the sub-frame number of many subframe schedulings according to business.
6. a kind of ACK/NACK reponse systems of the descending many subframe schedulings of FDD, it is characterised in that the system include base station eNB and
Multiple terminal UEs：
The eNB, its high level configures a Physical Uplink Control Channel PUCCH moneys for each UE in the uplink spectrum of each subframe
Source；
The UE, when receiving descending many subframe scheduling mandates, in scheduled many subframes, for sending the son authorized
Frame, the initial control of the physical downlink control channel PDCCH of the subframe authorized in the uplink spectrum of corresponding subframe using the transmission
The PUCCH resource that Channel Elements CCE is indicated feeds back the Physical Downlink Shared Channel PDSCH of the subframe of transmission mandate ACK/
NACK；For without the subframe authorized is sent, using the PUCCH resource configured for the UE to feed back in the uplink spectrum of corresponding subframe
Its PDSCH ACK/NACK.
7. a kind of ACK/NACK reponse systems of the descending many subframe schedulings of FDD, it is characterised in that the system include base station eNB and
Multiple terminal UEs：
The eNB, its high level is that multiple UE configure multiple or multiple gourp sharing PUCCH moneys in the uplink spectrum of each subframe
Source, and be that each UE configures a PUCCH resource instructions field in the Downlink Control Information DCI of each subframe, when for wherein one
When individual UE sends many subframe scheduling mandates, one of them or one group are indicated using for the PUCCH resource instructions field that the UE is configured
PUCCH resource；
The UE, when receiving descending many subframe scheduling mandates, last scheduled subframe corresponding subframe it is upper
The PDSCH's for all subframes that the PUCCH resource feedback that line frequency spectrum is currently indicated using its PUCCH resource instructions field is scheduled
ACK/NACK。
8. system according to claim 7, it is characterised in that：
The size of the PUCCH resource instructions field is n-bit, and the number or group number of the shared PUCCH resource are not more than 2n。
9. system according to claim 8, it is characterised in that：
The size of the PUCCH resource instructions field is 2 bits, and the number or group number of the shared PUCCH resource are 4.
10. the system according to claim 7 to 9 any of which, it is characterised in that：
The eNB, its high level needs the sub-frame number of many subframe schedulings of dynamic configuration according to business.
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| EP3393185B1 (en) | 2015-12-31 | 2021-11-10 | Huawei Technologies Co., Ltd. | Method for transmitting downlink feedback information, base station and terminal device |
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| CN101651995A (en) * | 2009-09-21 | 2010-02-17 | 中兴通讯股份有限公司 | Transmission method and system of downlink control information |
| CN102014505B (en) * | 2009-11-03 | 2013-09-11 | 电信科学技术研究院 | Method, equipment and system for resource allocation of upstream control channel |
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