CN103580831B - The method and apparatus for transmitting HARQ-ACK information - Google Patents
The method and apparatus for transmitting HARQ-ACK information Download PDFInfo
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Abstract
This application discloses a kind of methods that HARQ-ACK information is transmitted in the TDD CA system for supporting flexible change subframe duplex directions, comprising the following steps: UE receives the configuration information that base station configures its each Cell for working in CA mode；UE determines the HARQ-ACK timing relationship of the downlink transfer of each Cell according to the fixation downlink subframe of each Cell and the distribution of flexible sub-frame；UE sends HARQ-ACK information according to the HARQ-ACK timing relationship of identified each Cell.Disclosed herein as well is a kind of equipment that HARQ-ACK information is transmitted in the TDD CA system for supporting flexible change subframe duplex directions.Using technical solution disclosed in the present application, the variation of the duplex directions of flexible sub-frame is independently of HARQ-ACK timing relationship, to while realizing correct transmission HARQ-ACK information, the flexibility of descending scheduling is not influenced, and the application does not introduce new HARQ-ACK timing relationship, but HARQ-ACK timing relationship of the HARQ-ACK timing relationship of existing LTE TDD uplink-downlink configuration as Scell is reused, reduce the complexity of scheme.
Description
Technical field
This application involves mobile communication technology fields, in particular in the TDD CA for supporting flexible change subframe duplex directions
In system, the method and apparatus of transmission HARQ-ACK information.
Background technique
Long term evolution (LTE) system supports the working method of time division duplex (TDD).It is the frame knot of TDD system as shown in Figure 1
Structure.The length of each radio frames is 10ms, it is divided into the field that two length are 5ms.Each field includes that 8 length are
The time slot of 0.5ms and 3 special domains, i.e. descending pilot frequency time slot (DwPTS), protection interval (GP) and uplink pilot time slot
(UpPTS), the sum of the length of this 3 special domains is 1ms.Each subframe is made of two continuous time slots, i.e. k-th of subframe packet
2k containing time slot and time slot 2k+1.7 kinds of uplink-downlink configurations are supported in TDD system, as shown in table 1.Here, D represents downlink subframe, U
Represent sub-frame of uplink, S represent it is above-mentioned include 3 special domains special subframe.
The uplink-downlink configuration of table 1:LTE TDD
In LTE TDD system, the unit of resource allocation is Physical Resource Block (PRB), and a PRB includes 12 in frequency
A continuous subcarrier corresponds to a time slot in time.The preceding n OFDM symbol of one downlink subframe is used for transmission downlink control
Information processed, including Physical Downlink Control Channel (PDCCH) and other control information, remaining OFDM symbol are used to transmit PDSCH.
In the later release of LTE, it is also proposed that the concept of enhancing PDCCH (ePDCCH), difference are that ePDCCH is to be mapped to subframe
Data area send, i.e. ePDCCH and PDSCH be frequency division multiplexing (FDM).Below unless otherwise instructed, it does not need to distinguish
PDCCH and ePDCCH is handled, and is referred to as PDCCH.
The PDSCH resource in same downlink subframe is distributed by the inclusion of the PDCCH of downstream grants signaling in base station, and UE is received down
PDSCH is received after row authorization signaling and is decoded, and then according to certain timing relationship, is sent in a subsequent sub-frame of uplink
To the HARQ-ACK information of the PDSCH.Because TDD supports a variety of uplink-downlink configurations, can be fed back in a sub-frame of uplink n 0,
1 or the PDSCH in multiple downlink subframes or indicating downlink semi-persistent scheduling release PDCCH pairs of (SPS release)
The HARQ-ACK information answered, the index of these downlink subframes are n-k, and wherein k belongs to set K, and set K is by uplink-downlink configuration and upper
Row subframe n decision, as shown in table 2.
Table 2: index set K
It is to obtain bigger work by polymerizeing multiple unit carrier waves (CC) in enhancing (LTE-A) system of LTE system
Make bandwidth, i.e. carrier wave polymerization (CA), the downlink and uplink link of communication system is constituted, to support higher transmission rate.It is right
One UE, base station can configure it and work in multiple Cell, one of them is main Cell (Pcell), and other Cell are known as
Secondary Cell (Scell).
When the multiple Cell to condense together use identical uplink-downlink configuration, the HARQ-ACK information of all Cell exists
It is fed back on the sub-frame of uplink of Pcell, and can be multiplexed and as shown in table 2 a Cell be defined in LTE version 8 completely
HARQ-ACK timing relationship.It is still the sub-frame of uplink in Pcell when multiple Cell of CA use different uplink-downlink configurations
The HARQ-ACK information of all Cell of upper feedback, and be one of 7 kinds of existing uplink-downlink configurations of multi-meter 1 HARQ-ACK it is fixed
When HARQ-ACK timing relationship of the relationship as the PDSCH on Scell.To the TDD uplink-downlink configuration of every kind of Pcell and Scell
Combination, determine that the downlink transfer of Scell should be fixed using HARQ-ACK corresponding to which kind of TDD uplink-downlink configuration according to table 3
When relationship.
Table 3: the TDD uplink-downlink configuration of HARQ-ACK timing relationship is determined
In existing LTE TDD specification, the uplink-downlink configuration that cell uses is configured by broadcast signaling, that is, is included in
In system information block 1 (SIB1).In this way, LTE system supports most fast 640ms to change a uplink-downlink configuration, and according to existing
Specification at most change 32 subsystem information within 3 hours.For the variation of faster adaptation service characteristic, 3GPP at present
Tissue is studying the distribution for the ascending-descending subframes for how supporting to change at faster speed system.For example, supporting with faster
Speed changes uplink-downlink configuration, as 200ms changes once；Or it supports to change in time of wireless frame length 10ms this magnitude
Uplink-downlink configuration.In fact, base station dispatcher changes the distribution of ascending-descending subframes according to business demand, and use certain scheduling
Maintenance system is limited to operate normally, and which being currently operating in above-mentioned 7 kinds of uplink-downlink configurations UE can require no knowledge about
It is a kind of.Even, the distribution of the ascending-descending subframes of real work can be not limited to 7 kinds of uplink-downlink configurations in above-mentioned table 1, i.e., in fact
The ascending-descending subframes distribution on border can be transparent to UE.
To CA system, when the distribution of the ascending-descending subframes of some or all of Cell can flexibly change, base station and UE are bis-
Side need correctly to determine HARQ-ACK timing relationship used by the PDSCH of each Cell, can just make UE up direction just
HARQ-ACK information really is sent, and makes base station that HARQ-ACK information transmitted by UE be correctly received, to guarantee downlink
HARQ transmission is normally carried out.
Summary of the invention
This application provides the methods and apparatus of transmission HARQ-ACK information, to support flexible change subframe duplex directions
TDD CA system in, realize downlink HARQ transmission.
A kind of method for transmitting HARQ-ACK information disclosed in the present application, is applied to support flexible change subframe duplex directions
Time division duplex (TDD) carrier wave polymerization (CA) system in, comprising the following steps:
A, user equipment (UE) receives the configuration information that base station configures its each cell (Cell) for working in CA mode；
B, UE determines the downlink of each Cell according to the fixation downlink subframe of each Cell and the distribution of flexible sub-frame
The HARQ-ACK timing relationship of transmission；
C, UE sends HARQ-ACK information according to the HARQ-ACK timing relationship of identified each Cell.
Preferably, the B includes: for each secondary cell (Scell), if the ascending-descending subframes of main plot (Pcell)
Distribution can flexibly change, and the ascending-descending subframes distribution of the Scell cannot flexibly change, then according to Pcell in single Cell
The uplink-downlink configuration of reference uplink-downlink configuration A and the Scell in system determine that the Scell works in CA according to following table
The CA schema reference uplink-downlink configuration C of mode, and determined under the Scell according to the CA schema reference uplink-downlink configuration C
The HARQ-ACK timing relationship of row transmission:
Preferably, the B include: for each Scell, if Pcell ascending-descending subframes distribution cannot flexibly change,
And the ascending-descending subframes distribution of the Scell can flexibly change, then existed according to the uplink-downlink configuration of Pcell and the Scell
Reference uplink-downlink configuration B in single Cell system determines that the Scell is worked in the CA schema reference of CA mode according to following table
Downstream arrangements C, and determine that the HARQ-ACK of the downlink transfer of the Scell is fixed according to the CA schema reference uplink-downlink configuration C
When relationship:
Preferably, the B includes: for each Scell, if the distribution of the ascending-descending subframes of Pcell and the Scell is equal
Can flexibly it change, then the reference uplink-downlink configuration A according to Pcell in single Cell system and the Scell are in single Cell system
Reference uplink-downlink configuration B in system determines that the Scell works in the CA schema reference uplink-downlink configuration of CA mode according to following table
C, and determine according to the CA schema reference uplink-downlink configuration C HARQ-ACK timing relationship of the downlink transfer of the Scell:
Preferably, the C includes: to work as to send HARQ- on the Cell that an ascending-descending subframes distribution can flexibly change
When ACK information, HARQ-ACK information is only sent on the fixation sub-frame of uplink of the Cell.
This method may further include: according to the CA schema reference uplink-downlink configuration C of the Scell in LTE version 8
The binding window of definition determines the binding window of the Scell.
This method may further include: the CA schema reference uplink-downlink configuration C of the Scell is fixed in LTE version 8
It is actually that the subframe of downlink subframe is determined as the binding window of the Scell in the Scell in the binding window of justice.
This method may further include: the CA schema reference uplink-downlink configuration C of the Scell is fixed in LTE version 8
Be in the Scell actually in the binding window of justice fixed downlink subframe or flexible sub-frame subframe be determined as described in
The binding window of Scell.
This method may further include: the CA schema reference uplink-downlink configuration C of the Scell is fixed in LTE version 8
Justice binding window in be in the reference uplink-downlink configuration B of the Scell actually downlink subframe subframe be determined as described in
The binding window of Scell.
Preferably, it is described with reference to uplink-downlink configuration B by base station when configuring Scell, UE is indicated to by signaling.
A kind of equipment for transmitting HARQ-ACK information disclosed in the present application, is applied to support flexible change subframe duplex directions
Time division duplex (TDD) carrier wave polymerization (CA) system in, comprising: configuration module, timing relationship determining module and feedback module,
In:
Configuration module, for receive base station configure this equipment work in CA mode each cell (Cell) with confidence
Breath；
Timing relationship determining module, for according to configuration module received configuration information obtain under the fixation of each Cell
The distribution of row subframe and flexible sub-frame, and according to the fixation downlink subframe of each Cell and the distribution of flexible sub-frame, it determines each
The HARQ-ACK timing relationship of the downlink transfer of Cell；
Feedback module, for the HARQ-ACK timing relationship of each Cell according to determined by timing relationship determining module,
Send HARQ-ACK information.
Using technical solution disclosed in the present application, the variation of the duplex directions of flexible sub-frame is independently of HARQ-ACK timing
Relationship, to not influence the flexibility of descending scheduling, and the application is not while realizing correct transmission HARQ-ACK information
New HARQ-ACK timing relationship is introduced, but the HARQ-ACK timing relationship for reusing existing LTE TDD uplink-downlink configuration is made
For the HARQ-ACK timing relationship of Scell, the complexity of scheme is reduced.
Detailed description of the invention
Fig. 1 is the schematic diagram of existing TDD system frame structure；
Fig. 2 is the flow diagram of the preferably method of transmission HARQ-ACK information of the application one；
Fig. 3 is the composed structure schematic diagram of the preferably equipment of transmission HARQ-ACK information of the application one.
Specific embodiment
It is right hereinafter, referring to the drawings and the embodiments, for the objects, technical solutions and advantages of the application are more clearly understood
The application is described in further detail.
To the Cell of existing LTE TDD version 8/9/10/11, ascending-descending subframes distribution can only with existing broadcast signaling come
Change, the ascending-descending subframes distribution of hereinafter referred to as such Cell cannot flexibly change.And for supporting to change than faster speed
The Cell for becoming ascending-descending subframes distribution claims the distribution of its ascending-descending subframes that can flexibly change.It can spirit to ascending-descending subframes distribution
The cell of variation living, the subframe that duplex directions can change is referred to as flexible sub-frame.
The Cell that can flexibly change is distributed for ascending-descending subframes, the duplex directions of part of it subframe are to immobilize
, and other subframes are flexible sub-frames, i.e., its duplex directions is variable.For example, subframe 0, subframe 5, DwPTS and son in subframe 1
DwPTS in frame 6 is fixed for downlink duplex directions；Subframe 2, the UpPTS in subframe 1 and the UpPTS in subframe 6 are fixed for
Uplink duplex directions；And subframe 3,4,7,8 and 9 this 5 subframes, it can determine that it is fixed duplex side according to some other information
To subframe or flexible sub-frame.
For single Cell system, if the ascending-descending subframes distribution of the Cell can flexibly change, in order to backward simultaneous
Hold the UE for not supporting flexible sub-frame, needs to send one in broadcast message SIB1 according to the method for existing LTE version 8/9/10/11
A TDD uplink-downlink configuration, referred to as SIB1 uplink-downlink configuration, to make all UE for not supporting flexible sub-frame can be according to this
SIB1 uplink-downlink configuration normally receives and dispatches uplink and downlink data.And to the UE for supporting flexible sub-frame, due in SIB1 uplink-downlink configuration
A part of sub-frame of uplink can flexibly change as downlink subframe, in order to support downlink HARQ-ACK to transmit, to all fixed downlinks
Subframe and flexible sub-frame require to determine its corresponding HARQ-ACK timing position.A kind of method is except broadcast SIB1 uplink and downlink
Other than configuration, an existing LTE uplink-downlink configuration is selected, the reference uplink-downlink configuration of the referred to as Cell guarantees this with reference to upper
The set of the downlink subframe of downstream arrangements is the superset of the fixation downlink subframe of the Cell and the set of flexible sub-frame, thus according to
The HARQ-ACK timing relationship of each downlink subframe in the existing LTE uplink-downlink configuration is corresponding to determine that the Cell's is identical fixed
When position on downlink subframe HARQ-ACK timing relationship.The above method is described below are as follows: in single Cell system, according to this
The reference uplink-downlink configuration of Cell determines the HARQ-ACK timing relationship of its downlink transfer.
In TDD CA system, there can be one, multiple or whole Cell are using the ascending-descending subframes point flexibly changed
Cloth.In this way, in the HARQ-ACK timed-shutoff for the downlink transfer for defining the Cell that an ascending-descending subframes distribution can flexibly change
When being, for all fixed downlink subframes and flexible sub-frame of the Cell, require to define its corresponding HARQ-ACK timing position
It sets.In addition, when needing to send HARQ-ACK information on the Cell that the distribution of such a ascending-descending subframes can flexibly change,
In order to avoid the limitation to base station dispatcher, it can specify that the fixation sub-frame of uplink of the only Cell could be used to send HARQ-
ACK information.
In CA system, the Cell of Cell and uplink feedback HARQ-ACK information where downlink data transmission be can be not
Same Cell.For example, downlink data can occur on each Cell that base station configures in LTE version 10/11, but only
HARQ-ACK information can be transmitted on Pcell.In LTE version 10/11, only one in multiple Cell of CA UE configuration is
Pcell, in subsequent LTE version, however not excluded that UE can configure multiple Pcell, and this multiple Pcell may be used to uplink
The possibility of HARQ-ACK information feedback.Therefore, in the following description, Pcell refers to UE row subframe feedback HARQ- on it
The Cell of ACK information.
Fig. 2 is the flow diagram of the preferably method of transmission HARQ-ACK information of the application one.This method is applied to support
In the TDD CA system of flexible change subframe duplex directions, comprising the following steps:
Step 201:UE receives the configuration information that base station configures its each Cell for working in CA mode.
Whether can flexibly be changed according to the distribution of the ascending-descending subframes of Pcell and Scell, UE may operate in different feelings
Under condition.It specifically includes:
The ascending-descending subframes distribution of Pcell cannot flexibly change, and the distribution of the ascending-descending subframes of at least one Scell can be with
Flexibly variation；
Alternatively, the ascending-descending subframes distribution of Pcell can flexibly change, also, the ascending-descending subframes of at least one Scell
Distribution can flexibly change；
Alternatively, the ascending-descending subframes distribution of Pcell can flexibly change, also, the ascending-descending subframes distribution of whole Scell
Cannot flexibly it change.
Step 202:UE, in the fixation downlink subframe of each Cell of CA mode and the distribution of flexible sub-frame, is determined according to it
The HARQ-ACK timing relationship of the downlink transfer of each Cell.
For Pcell, the HARQ-ACK timing relationship of downlink transfer can be independently determined.If the uplink and downlink of Pcell
Subframe distribution can flexibly change, and as described above, can choose an existing LTE TDD uplink-downlink configuration conduct should
Reference downstream arrangements (hereinafter referred to as refer to uplink-downlink configuration A) of the Pcell in single Cell system, then, the downlink of the Pcell
The HARQ-ACK timing relationship under CA mode is transmitted also to be determined according to this with reference to uplink-downlink configuration A；If Pcell or more
Row subframe distribution cannot flexibly change, and the HARQ-ACK timing relationship of the downlink transfer of the Pcell is according to the upper of the Pcell itself
Downstream arrangements determine.
For each Scell, whether can flexibly be changed according to the distribution of the ascending-descending subframes of its own and Pcell, be determined
The HARQ-ACK timing relationship of the downlink transfer of the Scell.When UE is configured with multiple Scell, can be according to the present invention below
Method determine respectively each Scell downlink transfer HARQ-ACK timing relationship.
Specifically:, whether can be flexible according to the distribution of the ascending-descending subframes of the Pcell and Scell for a Scell
The various combination of variation can be divided into three kinds of situations:
The ascending-descending subframes distribution of Pcell can flexibly change, and the distribution of the ascending-descending subframes of Scell cannot flexibly become
Change；
The ascending-descending subframes distribution of Pcell cannot flexibly change, and the distribution of the ascending-descending subframes of Scell can flexibly become
Change；
The ascending-descending subframes distribution of Pcell and Scell can flexibly change.
The application does not introduce new HARQ-ACK timing relationship, but each Scell is determined on a kind of existing LTE
Downstream arrangements, the CA schema reference uplink-downlink configuration of the referred to as Scell, are denoted as below: referring to uplink-downlink configuration C, and according to ginseng
Downstream arrangements C is admitted to determine the HARQ-ACK timing relationship of the downlink transfer of the Scell.
Step 203:UE sends HARQ-ACK information according to the HARQ-ACK timing relationship of identified each Cell.
To step 202, describe to determine the method with reference to uplink-downlink configuration C at each occurrence separately below.
1) assume that the ascending-descending subframes distribution of Pcell can flexibly change, to a Scell, it is assumed that its ascending-descending subframes
Distribution cannot flexibly change, i.e., the first above-mentioned situation.
In the corresponding HARQ-ACK timing relationship of each downlink subframe of definition Scell, due to uplink and downlink of Pcell
Frame distribution can flexibly change, and the fixation sub-frame of uplink that can be only Pcell could be used to send HARQ-ACK information.This
Sample will not influence when the duplex directions of a flexible sub-frame of Pcell change and send on the fixed sub-frame of uplink of Pcell
Each Cell HARQ-ACK information, thus row dispatching flexibility under the influence of not.In this way, determining the reference uplink and downlink of Scell
The method of configuration C may is that the intersection of the sub-frame of uplink of the fixation sub-frame of uplink and Scell that determine Pcell first, then select
One existing LTE TDD uplink-downlink configuration, it is above-mentioned for making the set of the sub-frame of uplink of this existing LTE TDD uplink-downlink configuration
The subset of intersection, the set of the downlink subframe of such existing LTE TDD uplink-downlink configuration must be the super of Scell downlink subframe
Collection, to use this existing LTE TDD uplink-downlink configuration as the reference uplink-downlink configuration C of the CA mode of Scell.Here, it is
Optimization HARQ transmission performance, can to make the set of the sub-frame of uplink of this existing LTE TDD uplink-downlink configuration be above-mentioned intersection
Maximal subset or be equal to above-mentioned intersection.A kind of concrete implementation mode is described below.
As previously mentioned, to the downlink transfer in the fixation downlink subframe and flexible sub-frame of Pcell, HARQ-ACK timed-shutoff
It is the reference uplink-downlink configuration A according to the Pcell in single Cell system to determine.Due to the reference uplink-downlink configuration A of Pcell
The set of downlink subframe be therefore the superset of the fixation downlink subframe of Pcell and the set of flexible sub-frame is matched with reference to uplink and downlink
The sub-frame of uplink for setting A corresponds to the uplink-downlink configuration of Pcell, must be fixed sub-frame of uplink.
In this way, in the corresponding HARQ-ACK timing relationship of each downlink subframe for defining Scell, it can be according to Pcell
Reference uplink-downlink configuration A and Scell uplink-downlink configuration, the CA schema reference uplink-downlink configuration C of Scell is obtained, thus really
Determine the HARQ-ACK timing relationship of the downlink transfer of Scell.Here it is possible to the corresponding relationship of multi-meter 3, however, to ensure that only
There is the fixation sub-frame of uplink of Pcell that could be used for the HARQ-ACK feedback of Scell, is replaced with the reference uplink-downlink configuration A of Pcell
The uplink-downlink configuration of Pcell in table 3, to obtain the CA schema reference uplink-downlink configuration C of Scell as shown in table 4.
Table 4: determine the Scell of HARQ-ACK timing relationship with reference to uplink-downlink configuration
In the binding window for determining Scell, there can be following two method:
A kind of method is: to Scell, being determined that the CA schema reference uplink-downlink configuration C of HARQ-ACK timing relationship exists
Binding window defined in LTE version 8 is determined as the binding window of the Scell.
Another method is: to Scell, being determined the CA schema reference uplink-downlink configuration C of HARQ-ACK timing relationship
It is actually that the subframe of downlink subframe is determined as tying up for the Scell in the Scell in the binding window defined in LTE version 8
Determine window.
2) assume that the ascending-descending subframes distribution of Pcell cannot flexibly change, to a Scell, it is assumed that its ascending-descending subframes
Distribution can flexibly change, i.e., above-mentioned second situation.
All fixations in the corresponding HARQ-ACK timing relationship of each downlink subframe of definition Scell, to the Scell
Downlink subframe and flexible sub-frame require to define its corresponding HARQ-ACK timing position.In this way, determining in the reference of Scell
The method of downstream arrangements C may is that the intersection of the fixation sub-frame of uplink of the sub-frame of uplink and Scell that determine Pcell first, then
An existing LTE TDD uplink-downlink configuration is selected, the set of the sub-frame of uplink of this existing LTE TDD uplink-downlink configuration is made to be
The subset of above-mentioned intersection, the set of the downlink subframe of such existing LTE TDD uplink-downlink configuration must be the fixed downlinks of Scell
The superset of subframe and flexible sub-frame, to use this existing LTE TDD uplink-downlink configuration as in the reference of the CA mode of Scell
Downstream arrangements C.Here, in order to optimize HARQ transmission performance, the sub-frame of uplink of this existing LTE TDD uplink-downlink configuration can be made
Set be above-mentioned intersection maximal subset or be equal to above-mentioned intersection.A kind of concrete implementation mode is described below.
To Scell, an existing LTE TDD uplink-downlink configuration, the reference uplink-downlink configuration of hereinafter referred to as Scell are selected
B, the set of downlink subframe are the supersets of the fixation downlink subframe of the Scell and the set of flexible sub-frame, as long as to determine
With reference to the HARQ-ACK timing relationship of each downlink subframe in uplink-downlink configuration B, so that it may obtain all solid of the Scell
Determine downlink subframe and the corresponding HARQ-ACK timing relationship of flexible sub-frame.
When Scell can be used as only one serving cell (that is: the case where single Cell system) work of another UE, on
State Scell reference uplink-downlink configuration B can under it is particularly the case another UE for determining the HARQ- of its downlink transfer
The reference uplink-downlink configuration of ACK timing relationship；When the only one serving cell that Scell cannot function as some UE works independently
When, the reference uplink-downlink configuration B of above-mentioned Scell is only intended to further determine that reference uplink and downlink of the Scell under CA mode is matched
Set C.It is by the actual uplink-downlink configuration of Scell, i.e., in the signaling of the Scell of base station configuration UE in LTE version 10/11
The uplink-downlink configuration indicated in the SIB1 signaling of Scell is sent to UE.Here, because the ascending-descending subframes of Scell respectively can be with
Flexibly variation, base station can include the SIB1 uplink-downlink configuration of Scell in configuration signal when configuring the Scell of UE simultaneously
With the instruction information of reference uplink-downlink configuration B；Alternatively, base station when configuring the Scell of UE, can wrap in configuration signal simultaneously
The instruction information of SIB1 uplink-downlink configuration and flexible sub-frame containing Scell, UE can be according to SIB1 uplink-downlink configuration and flexibly sub
The instruction information of frame is obtained with reference to uplink-downlink configuration B.Alternatively, it is also possible to the broadcast message sent on UE reception Scell, and from
In obtain the reference uplink-downlink configuration B of Scell.
In this way, in the corresponding HARQ-ACK timing relationship of each downlink subframe for defining Scell, it can be according to Pcell
Uplink-downlink configuration and Scell reference uplink-downlink configuration B, the CA schema reference uplink-downlink configuration C of Scell is obtained, thus really
Determine the HARQ-ACK timing relationship of the downlink transfer of Scell.Here it is possible to the corresponding relationship of multi-meter 3, however, to ensure that right
All fixed downlink subframes and flexible sub-frame of Scell can define HARQ-ACK timing relationship, with the reference uplink and downlink of Scell
The uplink-downlink configuration for configuring the Scell in B substitution table 3, so that the CA schema reference uplink and downlink for obtaining Scell shown in table 5 is matched
Set C.
Table 5: determine the Scell of HARQ-ACK timing relationship with reference to uplink-downlink configuration
In the binding window for determining Scell, there can be following two method:
A kind of method is: to Scell, being determined that the CA schema reference uplink-downlink configuration C of HARQ-ACK timing relationship exists
Binding window defined in LTE version 8 is determined as the binding window of the Scell.
Another method is: to Scell, being determined the CA schema reference uplink-downlink configuration C of HARQ-ACK timing relationship
Be in the Scell actually in the binding window defined in LTE version 8 fixed downlink subframe or flexible sub-frame subframe it is true
It is set to the binding window of the Scell.This method can also be stated are as follows: to a Scell, be determined HARQ-ACK timed-shutoff
The CA schema reference uplink-downlink configuration C of system is bound in window defined in LTE version 8, is matched in the reference uplink and downlink of the Scell
Set in B is also that the subframe of downlink subframe is determined as the binding window of the Scell.Alternatively, being determined HARQ-ACK to Scell
The CA schema reference uplink-downlink configuration C of timing relationship binds reality current in the Scell in window defined in LTE version 8
It is also that the sub-frame set of downlink subframe is determined as the binding window of the Scell under the uplink-downlink configuration of border.
Here, UE can be only in the PDCCH or UE of the fixation downlink subframe detection scheduling Scell downlink transfer of Scell
Can Scell fixation downlink subframe and currently be possibly used for downlink transfer flexible sub-frame in detection scheduling Scell downlink
The PDCCH of transmission.If the flexible sub-frame of Scell is indicated by the uplink and downlink reference configuration B of Scell, UE can be with
The PDCCH of detection scheduling Scell downlink transfer in each downlink subframe of reference uplink-downlink configuration B.
3) assume that the ascending-descending subframes distribution of Pcell and Scell can flexibly change, i.e., the third above-mentioned situation, under
Face describes the method for determining the HARQ-ACK timing relationship of the downlink transfer of Scell.
Since the ascending-descending subframes distribution of Pcell can flexibly change, the fixation sub-frame of uplink of only Pcell can be
It can be used to send HARQ-ACK information.In this way, will not influence when the duplex directions of a flexible sub-frame of Pcell change
The HARQ-ACK information of each Cell sent on the fixed sub-frame of uplink of Pcell, thus row dispatching flexibility under the influence of not.To one
A Scell, since the distribution of its ascending-descending subframes can flexibly change, in the corresponding HARQ- of each downlink subframe for defining Scell
When ACK timing relationship, to all fixed downlink subframes and flexible sub-frame of the Scell, require to define its corresponding HARQ-
ACK timing position.In this way, the method for determining the reference uplink-downlink configuration C of Scell may is that in the fixation for determining Pcell first
Then the intersection of the fixation sub-frame of uplink of row subframe and Scell selects an existing LTE TDD uplink-downlink configuration, makes this
The set of the sub-frame of uplink of existing LTE TDD uplink-downlink configuration is the subset of above-mentioned intersection, such existing LTE TDD uplink and downlink
The set of the downlink subframe of configuration must be the superset of Scell fixed downlink subframe and flexible sub-frame, thus with this existing LTE
Reference uplink-downlink configuration C of the TDD uplink-downlink configuration as the CA mode of Scell.It here, can in order to optimize HARQ transmission performance
So that the set of the sub-frame of uplink of this existing LTE TDD uplink-downlink configuration is the maximal subset of above-mentioned intersection or is equal to above-mentioned
Intersection.A kind of concrete implementation mode is described below.
As previously mentioned, to the downlink transfer in the fixation downlink subframe and flexible sub-frame of Pcell, HARQ-ACK timed-shutoff
It is the reference uplink-downlink configuration A according to the Pcell in single Cell system to determine, this refers to uplink of uplink-downlink configuration A
Frame corresponds to the uplink-downlink configuration of Pcell, for fixed sub-frame of uplink.
To Scell, an existing LTE uplink-downlink configuration is selected, the reference uplink-downlink configuration B of hereinafter referred to as Scell,
The set of downlink subframe is the superset of the fixation downlink subframe of the Cell and the set of flexible sub-frame, as long as so that the ginseng be determined
It is admitted to the HARQ-ACK timing relationship of each downlink subframe in downstream arrangements B, so that it may obtain under all fixations of the Scell
Row subframe and the corresponding HARQ-ACK timing relationship of flexible sub-frame.
When Scell can be used as only one serving cell (that is: the case where single Cell system) work of another UE, on
State Scell reference uplink-downlink configuration B can under it is particularly the case another UE for determining the HARQ- of its downlink transfer
The reference uplink-downlink configuration of ACK timing relationship；When the only one serving cell that Scell cannot function as some UE works independently
When, the reference uplink-downlink configuration B of above-mentioned Scell is only intended to further determine that reference uplink and downlink of the Scell under CA mode is matched
Set C.It is by the actual uplink-downlink configuration of Scell, i.e., in the signaling of the Scell of base station configuration UE in LTE version 10/11
The uplink-downlink configuration indicated in the SIB1 signaling of Scell is sent to UE.Here, because the ascending-descending subframes of Scell respectively can be with
Flexibly variation, base station can include the SIB1 uplink-downlink configuration of Scell in configuration signal when configuring the Scell of UE simultaneously
With the instruction information of reference uplink-downlink configuration B；Alternatively, base station when configuring the Scell of UE, can wrap in configuration signal simultaneously
The instruction information of SIB1 uplink-downlink configuration and flexible sub-frame containing Scell, UE can be according to SIB1 uplink-downlink configuration and flexibly sub
The instruction information of frame is obtained with reference to uplink-downlink configuration B.Alternatively, it is also possible to the broadcast message sent on UE reception Scell, and from
In obtain the reference uplink-downlink configuration B of Scell.
In this way, in the corresponding HARQ-ACK timing relationship of each downlink subframe for defining Scell, it can be according to Pcell
Reference uplink-downlink configuration A and Scell reference uplink-downlink configuration B, obtain the CA schema reference uplink-downlink configuration C of Scell, from
And determine the HARQ-ACK timing relationship of the downlink transfer of Scell.Here it is possible to the corresponding relationship of multi-meter 3, but in order to protect
The HARQ-ACK feedback that card only has the fixation sub-frame of uplink of Pcell that could be used for Scell, with the reference uplink-downlink configuration A of Pcell
The uplink-downlink configuration of Pcell in substitution table 3, and in order to guarantee all fixed downlink subframes and flexible sub-frame to Scell
HARQ-ACK timing relationship can be defined, is matched with the uplink and downlink of the Scell in the reference uplink-downlink configuration B substitution table 3 of Scell
It sets, to obtain the CA schema reference uplink-downlink configuration C of Scell shown in table 6.
Table 6: determine the Scell of HARQ-ACK timing relationship with reference to uplink-downlink configuration
In the binding window for determining Scell, there can be following two method:
A kind of method is: to Scell, being determined that the CA schema reference uplink-downlink configuration C of HARQ-ACK timing relationship exists
Binding window defined in LTE version 8 is determined as the binding window of the Scell.
Another method is: to Scell, being determined the CA schema reference uplink-downlink configuration C of HARQ-ACK timing relationship
Be in the Scell actually in the binding window defined in LTE version 8 fixed downlink subframe or flexible sub-frame subframe it is true
It is set to the binding window of the Scell.This method can also be stated are as follows: to a Scell, be determined HARQ-ACK timed-shutoff
The CA schema reference uplink-downlink configuration C of system is bound in window defined in LTE version 8, is matched in the reference uplink and downlink of the Scell
Set in B is also that the subframe of downlink subframe is determined as the binding window of the Scell.Alternatively, being determined HARQ-ACK to Scell
The CA schema reference uplink-downlink configuration C of timing relationship binds reality current in the Scell in window defined in LTE version 8
It is also that the sub-frame set of downlink subframe is determined as the binding window of the Scell under the uplink-downlink configuration of border.
Here, UE can be only in the PDCCH or UE of the fixation downlink subframe detection scheduling Scell downlink transfer of Scell
Can Scell fixation downlink subframe and currently be possibly used for downlink transfer flexible sub-frame in detection scheduling Scell downlink
The PDCCH of transmission.If the flexible sub-frame of Scell is indicated by the uplink and downlink reference configuration B of Scell, UE can be with
The PDCCH of detection scheduling Scell downlink transfer in each downlink subframe of reference uplink-downlink configuration B.
Corresponding to the above method, the application also proposes a kind of equipment for transmitting HARQ-ACK information, and the equipment application is in branch
It holds in the TDD CA system of flexible change subframe duplex directions, as shown in figure 3, the equipment includes: configuration module 310, timed-shutoff
It is determining module 320 and feedback module 330, in which:
Configuration module 310 configures the configuration that this equipment works in each cell (Cell) of CA mode for receiving base station
Information；
Timing relationship determining module 320, for according to configuration module 310 received configuration information obtain each Cell's
The distribution of fixed downlink subframe and flexible sub-frame, and according to the fixation downlink subframe of each Cell and the distribution of flexible sub-frame, really
The HARQ-ACK timing relationship of the downlink transfer of fixed each Cell；
Feedback module 330, the HARQ-ACK timing for each Cell according to determined by timing relationship determining module 320
Relationship sends HARQ-ACK information.
Using technical solution disclosed in the present application, the variation of the duplex directions of flexible sub-frame is independently of HARQ-ACK timing
Relationship, to not influence the flexibility of descending scheduling, and the application is not while realizing correct transmission HARQ-ACK information
New HARQ-ACK timing relationship is introduced, but the HARQ-ACK timing relationship for reusing existing LTE TDD uplink-downlink configuration is made
For the HARQ-ACK timing relationship of Scell, the complexity of scheme is reduced.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the application protection.
Claims (20)
1. a kind of method for transmitting HARQ-ACK information, applied to the Time Division Duplex TDD for supporting flexible change subframe duplex directions
Carrier wave polymerize in CA system, which comprises the following steps:
User equipment (UE) receives the configuration information that base station configures its each cell Cell for working in CA mode；
UE determines that each secondary cell Scell works in the CA schema reference uplink and downlink of CA mode according to the configuration information of each Cell
C is configured, and determines according to the CA schema reference uplink-downlink configuration C HARQ-ACK timed-shutoff of the downlink transfer of the Scell
System；
UE sends HARQ-ACK information according to the HARQ-ACK timing relationship of identified each Cell.
2. the method as described in claim 1, it is characterised in that:
For each secondary cell Scell, if the ascending-descending subframes distribution of main plot Pcell can flexibly change, and described
The ascending-descending subframes distribution of Scell cannot flexibly change, then the reference uplink-downlink configuration A according to Pcell in single Cell system
With the uplink-downlink configuration of the Scell, determine that the Scell works in the CA schema reference uplink and downlink of CA mode and matches according to following table
C is set, and determines according to the CA schema reference uplink-downlink configuration C HARQ-ACK timing relationship of the downlink transfer of the Scell:
3. the method as described in claim 1, it is characterised in that:
For each Scell, if the ascending-descending subframes distribution of Pcell cannot flexibly change, and uplink and downlink of the Scell
Frame distribution can flexibly change, then above and below the reference according to the uplink-downlink configuration of Pcell and the Scell in single Cell system
Row configuration B, determines that the Scell works in the CA schema reference uplink-downlink configuration C of CA mode according to following table, and according to the CA
Schema reference uplink-downlink configuration C determines the HARQ-ACK timing relationship of the downlink transfer of the Scell:
4. the method as described in claim 1, it is characterised in that:
For each Scell, if the distribution of the ascending-descending subframes of Pcell and the Scell can flexibly change, basis
Pcell is in the reference uplink-downlink configuration of reference uplink-downlink configuration A and the Scell in single Cell system in single Cell system
B determines that the Scell works in the CA schema reference uplink-downlink configuration C of CA mode according to following table, and is joined according to the CA mode
It is admitted to the HARQ-ACK timing relationship that downstream arrangements C determines the downlink transfer of the Scell:
5. such as the described in any item methods of Claims 1-4, which is characterized in that the UE is according to identified each Cell's
HARQ-ACK timing relationship sends HARQ-ACK information
When sending HARQ-ACK information on the Cell that an ascending-descending subframes distribution can flexibly change, only the Cell's
HARQ-ACK information is sent on fixed sub-frame of uplink.
6. such as the described in any item methods of claim 2 to 4, which is characterized in that this method further comprises:
Window is bound defined in the LTE version 8 according to the CA schema reference uplink-downlink configuration C of the Scell, determine described in
The binding window of Scell.
7. method according to claim 2, which is characterized in that this method further comprises:
The CA schema reference uplink-downlink configuration C of the Scell is bound in window defined in LTE version 8 actually described
It is that the subframe of downlink subframe is determined as the binding window of the Scell in Scell.
8. the method as claimed in claim 3 or 4, which is characterized in that this method further comprises:
The CA schema reference uplink-downlink configuration C of the Scell is bound in window defined in LTE version 8 actually described
It is that the subframe of fixed downlink subframe or flexible sub-frame is determined as the binding window of the Scell in Scell.
9. the method as claimed in claim 3 or 4, which is characterized in that this method further comprises:
The CA schema reference uplink-downlink configuration C of the Scell is bound in window defined in LTE version 8 actually described
It is that the subframe of downlink subframe is determined as the binding window of the Scell in the reference uplink-downlink configuration B of Scell.
10. the method as claimed in claim 3 or 4, it is characterised in that:
The reference uplink-downlink configuration B, when configuring Scell, is indicated to UE by signaling by base station.
11. a kind of equipment for transmitting HARQ-ACK information, applied to the Time Division Duplex TDD for supporting flexible change subframe duplex directions
Carrier wave polymerize in CA system characterized by comprising configuration module, timing relationship determining module and feedback module, in which:
Configuration module configures the configuration information that this equipment works in each cell Cell of CA mode for receiving base station；
Timing relationship determining module, for determining that each secondary cell Scell works according to the received configuration information of configuration module institute
The Scell is determined in the CA schema reference uplink-downlink configuration C of CA mode, and according to the CA schema reference uplink-downlink configuration C
Downlink transfer HARQ-ACK timing relationship；
Feedback module is sent for the HARQ-ACK timing relationship of each Cell according to determined by timing relationship determining module
HARQ-ACK information.
12. equipment as claimed in claim 11, it is characterised in that:
For each secondary cell Scell, if the ascending-descending subframes distribution of main plot Pcell can flexibly change, and described
The ascending-descending subframes distribution of Scell cannot flexibly change, then the timing relationship determining module is according to Pcell in single Cell system
In reference uplink-downlink configuration A and the Scell uplink-downlink configuration, determine that the Scell works in CA mode according to following table
CA schema reference uplink-downlink configuration C, and according to the CA schema reference uplink-downlink configuration C determine the Scell downlink pass
Defeated HARQ-ACK timing relationship:
13. equipment as claimed in claim 11, it is characterised in that:
For each Scell, if the ascending-descending subframes distribution of Pcell cannot flexibly change, and uplink and downlink of the Scell
Frame distribution can flexibly change, then the timing relationship determining module is according to the uplink-downlink configuration and the Scell of Pcell in list
Reference uplink-downlink configuration B in Cell system determines that the Scell works in the CA schema reference of CA mode or more according to following table
Row configuration C, and the HARQ-ACK of the downlink transfer of the Scell is determined periodically according to the CA schema reference uplink-downlink configuration C
Relationship:
14. equipment as claimed in claim 11, it is characterised in that:
It is described fixed if the distribution of the ascending-descending subframes of Pcell and the Scell can flexibly change for each Scell
When relationship determination module according to Pcell reference uplink-downlink configuration A in single Cell system and the Scell in single Cell system
In reference uplink-downlink configuration B, determine that the Scell works in the CA schema reference uplink-downlink configuration C of CA mode according to following table,
And the HARQ-ACK timing relationship of the downlink transfer of the Scell is determined according to the CA schema reference uplink-downlink configuration C:
15. such as the described in any item equipment of claim 11 to 14, it is characterised in that:
When sending HARQ-ACK information on the Cell that an ascending-descending subframes distribution can flexibly change, the feedback module
HARQ-ACK information is only sent on the fixation sub-frame of uplink of the Cell.
16. such as the described in any item equipment of claim 12 to 14, it is characterised in that:
The timing relationship determining module is also used to the CA schema reference uplink-downlink configuration C according to the Scell in LTE version 8
Defined in bind window, determine the binding window of the Scell.
17. equipment as claimed in claim 12, it is characterised in that:
The timing relationship determining module is also used to the CA schema reference uplink-downlink configuration C by the Scell in LTE version 8
It is actually that the subframe of downlink subframe is determined as the binding window of the Scell in the Scell in the binding window of definition.
18. equipment according to claim 13 or 14, it is characterised in that:
The timing relationship determining module is also used to the CA schema reference uplink-downlink configuration C by the Scell in LTE version 8
Be in the Scell actually in the binding window of definition fixed downlink subframe or flexible sub-frame subframe be determined as it is described
The binding window of Scell.
19. equipment according to claim 13 or 14, it is characterised in that:
The timing relationship determining module is also used to the CA schema reference uplink-downlink configuration C by the Scell in LTE version 8
Be in the reference uplink-downlink configuration B of the Scell actually in the binding window of definition downlink subframe subframe be determined as it is described
The binding window of Scell.
20. equipment according to claim 13 or 14, it is characterised in that:
The reference uplink-downlink configuration B, when configuring Scell, is indicated to UE by signaling by base station.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310197144.6A CN103580831B (en) | 2012-07-24 | 2013-05-24 | The method and apparatus for transmitting HARQ-ACK information |
| US13/949,906 US9325476B2 (en) | 2012-07-24 | 2013-07-24 | Method and apparatus for transmitting HARQ-ACK |
| AU2013293772A AU2013293772B2 (en) | 2012-07-24 | 2013-07-24 | Method and apparatus for transmitting HARQ-ACK |
| EP13823674.0A EP2878094B1 (en) | 2012-07-24 | 2013-07-24 | Method and apparatus for transmitting harq-ack |
| KR1020157004169A KR102142592B1 (en) | 2012-07-24 | 2013-07-24 | Method and apparatus for transmitting harq-ack |
| JP2015524177A JP6317344B2 (en) | 2012-07-24 | 2013-07-24 | Method and apparatus for transmitting HARQ-ACK |
| PCT/KR2013/006626 WO2014017824A1 (en) | 2012-07-24 | 2013-07-24 | Method and apparatus for transmitting harq-ack |
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| CN201210258428 | 2012-07-24 | ||
| CN201210258428.7 | 2012-07-24 | ||
| CN2012102584287 | 2012-07-24 | ||
| CN201310197144.6A CN103580831B (en) | 2012-07-24 | 2013-05-24 | The method and apparatus for transmitting HARQ-ACK information |
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| CN105451340B (en) * | 2014-08-29 | 2019-02-05 | 中国移动通信集团公司 | A kind of method, apparatus and terminal device of carrier wave polymerization |
| WO2017026400A1 (en) * | 2015-08-13 | 2017-02-16 | 株式会社Ｎｔｔドコモ | User terminal, wireless base station, and wireless communication method |
| ES2794399T3 (en) | 2015-08-14 | 2020-11-18 | Huawei Tech Co Ltd | Information transmission and reception method, and device |
| CN110192369B (en) * | 2017-12-28 | 2022-06-03 | 北京小米移动软件有限公司 | Method and device for transmitting hybrid automatic repeat request information |
| US10820341B2 (en) | 2018-02-12 | 2020-10-27 | Mediatek Inc. | Determination of requirement of UE processing time in NR |
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| US20110176461A1 (en) * | 2009-12-23 | 2011-07-21 | Telefonakatiebolaget Lm Ericsson (Publ) | Determining configuration of subframes in a radio communications system |
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| WO2010049587A1 (en) * | 2008-10-31 | 2010-05-06 | Nokia Corporation | Dynamic allocation of subframe scheduling for time division duplex operation in a packet-based wireless communication system |
| CN102111252A (en) * | 2009-12-25 | 2011-06-29 | 中兴通讯股份有限公司 | Hybrid automatic repeat request-based repeat resource distribution method |
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