CN104426637A - Hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback method of carrier aggregation system, and user terminal - Google Patents
Hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback method of carrier aggregation system, and user terminal Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L5/0091—Signaling for the administration of the divided path
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Abstract
The invention discloses a hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback method of carrier aggregation system downlink data. According to the method, user equipment (UE) acquires configuration information of each aggregation carrier firstly, and then according to the acquired configuration information, HARQ-ACK feedback timing and transmission of aggregation carrier downlink data of each eNB received by the UE are confirmed. The invention also discloses a user terminal for HARQ-ACK feedback of carrier aggregation system downlink data. Through adoption of the method and the user terminal, the HARQ-ACK of physical downlink shared channels (PDSCH)/physical downlink control channels (PDCCH) of all subframes of all aggregation carrier can find corresponding uplink resource, physical uplink control channels (PUCCH) of all aggregation carrier do not overlap in time, downlink bandwidth is effectively used while hardware cost is not improved, and the performance of the system is improved.
Description
Technical field
The application relates to mobile communication technology field, in particular in carrier aggregation system, when duplex mode or the affiliated eNB difference of aggregation cell (Aggregated Cell), Physical Downlink Shared Channel (PDSCH, Physical Downlink Shared Channel) and the response (ACK:ACKnowledgment) of Physical Downlink Control Channel (PDCCH, Physical DownlinkControl Channel) and the timing of negative response (NACK:NegativeACKnowledgment) and the method for transmission.
Background technology
Long Term Evolution (the LTE:Long Term Evolution) system of 3GPP standardization body supports Frequency Division Duplexing (FDD) (FDD:Frequency Division Dulplex) and time division duplex (TDD:Time Division Dulplex) two kinds of duplex modes.In LTE TDD, the length of each radio frames is 10ms, and it is divided into two length is the field of 5ms, specifically LTE tdd frame structure as shown in Figure 1.In figure, each field comprises the time slot and 3 special domain that 8 length are 0.5ms, and these 3 special domain comprise descending pilot frequency time slot (DwPTS), protection interval (GP) and uplink pilot time slot (UpPTS), the length of these 3 special domain be 1ms.LTE TDD supports 7 kinds of upstream and downstream configurations, and as shown in table 1, wherein, the D in table 1 represents descending sub frame, and U represents sub-frame of uplink, and S representative comprises the special subframe of above-mentioned 3 special domain.
Table 1
In LTE system, the maximum bandwidth that each community is supported is 20MHz, and in order to improve the peak rate of UE, LTE-Advanced system introduces carrier aggregation technology, by multiple continuously or discrete carrier condense together, form a more wide spectrum.By carrier aggregation technology, UE and can be operated in the cell communication of different carrier frequencies simultaneously, makes transmission bandwidth be up to 100MHz, improves the peak rate of UE.The carrier wave of a polymerization is called as a member carrier (CC:Component Carrier), is also referred to as a community.For the UE be operated under carrier aggregation, the little of polymerization divides into main plot (Pcell:Primary Cell) and auxiliary community (Scell:Secondary Cell).
All communities of current participation UE carrier aggregation all adopt identical duplex mode, and namely all aggregation cell all adopt the mode of FDD, or all adopt the mode of TDD.When eNB can use FDD and TDD frequency range simultaneously, in order to improve peak rate and the frequency spectrum utilization rate of UE, the carrier aggregation of TDD cell and FDD community should be supported.In the carrier aggregation of different duplex mode, Pcell may be TDD cell also may be FDD cell.
In current carrier aggregation, each polymerization carrier wave be subordinated to identical eNB, in order to improve the peak rate of UE further, carrier aggregation technology should be extended to across eNB(inter-eNB) situation.Across eNB carrier aggregation, what is called refers to that a UE and multiple eNB carries out transfer of data simultaneously, the community namely in carrier aggregation can be subordinated to different eNB, as shown in Figure 2.Like this, under the network environment covered by different e NB overlap, still can be increased the bandwidth of operation of UE by carrier aggregation technology, thus improve the hardware circuit solution of UE.
Carrier aggregation technology under different duplex mode or different e NB is all different from the feature of existing carrier aggregation technology, brings new problem also to the application of carrier aggregation technology.Such as due to UE uplink ability and through-put power restriction, during current up channel feedback HARQ (Hybrid Automatic Repeat Request)-ACK information, only transmit on Pcell.And when FDD cell and TDD cell is polymerized and TDD cell is Pcell, no matter be the HARQ sequential according to TDD or FDD, for some descending sub frame of FDD cell, can not find the up channel of its HARQ-ACK of transmission, cause the wasting of resources.
In addition, across in eNB system, the PDSCH data transmitted in different e NB are dispatched by different eNB, and by different eNB dispatching offices use PDCCH minimum CCE index information and by scheduling PDSCH PDCCH in ARI territory indicate resource can not share between different e NB, namely an eNB does not know the minimum CCE index information of the PDCCH used by another eNB dispatching office and the resource by the ARI territory instruction in the PDCCH of scheduling PDSCH, UE is the resource determining transmitting HARQ-ACK according to minimum CCE index or ARI territory, the method of therefore current transmitting HARQ-ACK resource mapping can not normally use.
Visible, in the carrier aggregation technology under different duplex mode and under different e NB, HARQ-ACK feedback information transmission will face many new problems, the method that can not describe in simple multiplexing existing LTE-Advanced agreement.
Summary of the invention
Application provides a kind of method and user terminal of HARQ-ACK feedback of carrier aggregation system downlink data, in each polymerization carrier wave, the HARQ-ACK information of the PDSCH/PDCCH of many as far as possible subframes can find corresponding ascending resource, the PUCCH of each polymerization carrier wave can not overlap in time simultaneously, do not increase on the basis of hardware cost, effectively utilize downlink bandwidth, improve the performance of system.
A HARQ-ACK feedback method for carrier aggregation system downlink data, comprising:
UE receives the configuration information of aggregation cell; Described configuration information comprises the aggregation cell mark of each eNB participating in described UE carrier aggregation, the duplex mode of aggregation cell, for the carrier aggregation across eNB, described configuration information comprises the Pcell for transmitting HARQ-ACK information under the corresponding eNB that each eNB specifies further;
UE receives PDCCH and PDSCH data from each aggregation cell cell participating in carrier aggregation respectively, and determines corresponding HARQ-ACK information;
UE, according to described configuration information, determines the HARQ-ACK timing relationship of each cell PDSCH and PDCCH and transmits the cell of described HARQ-ACK information;
The cell determined transmits described HARQ-ACK information according to described timing relationship.
Preferably, when carrier aggregation under the carrier aggregation of described UE is same eNB, if the Pcell of this eNB adopt TDD mode and Scell comprises FDD Scell time,
Comprise eNB further at described configuration information and descend at it main FDDScell selected in all FDD Scell;
When determining the cell of described timing relationship and transmitting HARQ-ACK information, the HARQ timing relationship of the PDSCH/PDCCH of described FDD Scell adopts the HARQ timing relationship of FDD; When having sub-frame of uplink on the Pcell at described eNB He on described FDD Scell, and when feeding back the HARQ-ACK information of each cell PDSCH/PDCCH on PUCCH, the PUCCH of this Pcell feeds back the HARQ-ACK information of each cell under corresponding eNB, when sub-frame of uplink is only at described FDD Scell, the main FDD Scell indicated feeds back the HARQ-ACK information of each FDD Scell in configuration information.
Preferably, when the subframe n of the Pcell of described arbitrary eNB is sub-frame of uplink, on the main FDDScell subframe n of execution cost, the control channel of PUSCH comprises the UL DAI order of 2 bits, and described UL DAI order is used to indicate the maximum of the descending sub frame number described main FDD Scell subframe n feeding back HARQ-ACK information.
Preferably, the method comprises further: when carrying out power to the PUCCH for transmitting HARQ-ACK information and controlling according to the power of the PUCCH power adjustment PUCCH of identical cell.
Preferably, for the main FDD Scell of described arbitrary eNB, when subframe n is when the Pcell of eNB is sub-frame of uplink, the power adjustment state value g of the subframe n of described main FDD Scell
fScell(n)=g
fScell(n-1).
Preferably, for the carrier aggregation across eNB, determine that the Pcell of each eNB is for transmitting the HARQ-ACK information of each cell PDSCH/PDCCH under this eNB.
Preferably, for the carrier aggregation across eNB, when determining the cell of described timing relationship and transmitting HARQ-ACK information, if the Pcell participating in arbitrary eNB of carrier aggregation adopts FDD mode, and the Pcell that there are other eNB adopts TDD mode, then the HARQ-ACK information of each cell PDSCH/PDCCH under determining to transmit corresponding eNB on the sub-frame of uplink 0,1,5 and/or 6 of the Pcell of described arbitrary eNB.
Preferably, the HARQ-ACK of each feedback 3 descending sub frames on the sub-frame of uplink 0 and sub-frame of uplink 5 of the Pcell of described arbitrary eNB, at the sub-frame of uplink 1 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 62 descending sub frames; Or,
At the sub-frame of uplink 0 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 52 descending sub frames, at the sub-frame of uplink 1 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 63 descending sub frames; Or,
At the sub-frame of uplink 0 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 54 descending sub frames, at the sub-frame of uplink 1 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 61 descending sub frame; Or,
At the sub-frame of uplink 0 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 51 descending sub frame, at the sub-frame of uplink 1 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 64 descending sub frames.
Preferably, under the sub-frame of uplink 0,1,5 and/or 6 of the Pcell of described arbitrary eNB transmits corresponding eNB, the HARQ-ACK information of each cell comprises: in described arbitrary eNB, for PDSCH and PDCCH received at subframe n-k, subframe n transmits its HARQ-ACK information; Wherein,
| Subframe sequence number n | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 7,6,5 | 5,4 | - | - | - | 7,6,5 | 5,4 | - | - | - |
Or,
| Subframe sequence number n012 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k7,6,6,5,4- | - | - | 7,6 | 6,5,4 | - | - | - |
Or,
| Subframe sequence number n | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 7,6,5,4 | 4 | - | - | - | 7,6,5,4 | 4 | - | - | - |
Or,
| Subframe sequence number n | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 7 | 7,6,5,4 | - | - | - | 7 | 7,6,5,4 | - | - | - |
Preferably, the method comprises further: when carrying out power to the PUCCH for transmitting HARQ-ACK information and controlling according to the PUCCH power adjustment PUCCH power of identical cell.
Preferably, for the carrier aggregation across eNB, if the Pcell of arbitrary eNB adopts FDD mode, and when there is the Pcell employing TDD mode of other eNB, the PUCCH power adjustment state value of the subframe 2,3,4,7,8 or 9 of the Pcell of described arbitrary eNB is g
f(n)=g
f(n-1).
Preferably, for the carrier aggregation across eNB, if the Pcell of arbitrary eNB adopts FDD mode, and when there is the Pcell employing TDD mode of other eNB, in the subframe 0,1,5 and 6 of the arbitrary eNB Pcell of execution cost, the control channel of PUSCH comprises the UL DAI order of dibit, is used to indicate the maximum of the descending sub frame number described Pcell subframe n feeding back HARQ-ACK information.
Preferably, for the carrier aggregation across eNB, when determining the cell of described timing relationship and transmitting HARQ-ACK information, if the Pcell participating in all eNB of carrier aggregation all adopts FDD mode, then determine the HARQ-ACK information of each cell PDSCH/PDCCH under each eNB transmits eNB in mutually different subframe.
Preferably, when the Pcell of the eNB participating in carrier aggregation all adopts FDD mode, one of them eNB transmits HARQ-ACK information on the sub-frame of uplink 0,1,5 and/or 6 of Pcell, and another eNB transmits HARQ-ACK information on the sub-frame of uplink 2,3,4,7,8 and/or 9 of Pcell.
Preferably, when the cell determined transmits described HARQ-ACK information according to described timing relationship, when sending HARQ-ACK information and wherein any two cell exist overlapping region in time for the subframe sending HARQ-ACK information on plural cell, then the subframe occurring described overlapping region in the subframe second half section uses the PUCCH transformat of brachymemma.
A user terminal in carrier aggregation system, comprises configuration information receiving element, HARQ-ACK information determination unit and HARQ-ACK information transmission unit;
Described configuration information receiving element, for receiving the configuration information of aggregation cell;
Described HARQ-ACK information determination unit, for receiving PDCCH and PDSCH data from each aggregation cell cell participating in carrier aggregation, and determines corresponding HARQ-ACK information;
Described HARQ-ACK information transmission unit, for the described configuration information received according to described configuration receiving element, determine that each each aggregation cell cell participating in carrier aggregation receives PDCCH and PDSCH data HARQ timing relationship, transmit described HARQ-ACK information according to described timing relationship.
As seen from the above technical solution, in the application, UE receives the configuration information of aggregation cell, and receives PDCCH and PDSCH data from the cell participating in carrier aggregation respectively, and determines corresponding HARQ-ACK information; UE, according to the configuration information received, determines the cell of timing relationship between each cell PDSCH/PDCCH and its HARQ-ACK and transmitting HARQ-ACK information, and according to the timing relationship transmitting HARQ-ACK information determined on the cell determined.Wherein, for the carrier aggregation across eNB, the cell of transmission PDSCH/PDCCH and the cell of the corresponding HARQ-ACK information of feedback belongs to identical eNB.By the way, each eNB send PDSCH/PDCCH and all transmit in the cell of identical eNB with its HARQ-ACK information, the HARQ-ACK avoiding an eNB to send PDSCH distributes corresponding resource by another eNB.Further, when needs send HARQ-ACK information on plural cell, the HARQ-ACK of two cell should be made to transmit at different sub-frame of uplink, avoid two cell to send HARQ-ACK simultaneously, thus unlikely increase hardware cost, in addition, because the difference of two cell postpones, the HARQ-ACK transmission of two cell is caused to overlap, the part subframe sending HARQ-ACK information uses the PUCCH transformat of brachymemma, transmitting HARQ-ACK information when can ensure different on any two cell, thus effectively utilize downlink bandwidth, the performance of raising system.
Accompanying drawing explanation
Fig. 1 is the frame structure schematic diagram of LTE TDD;
Fig. 2 is across eNB carrier aggregation schematic diagram;
Fig. 3 is the overview flow chart of the HARQ-ACK feedback method of PDSCH/PDCCH in the application;
Fig. 4 is the flow chart of the embodiment of the present application one;
Fig. 5 is the example explanation of the embodiment of the present application one;
Fig. 6 is the example explanation that the embodiment of the present application one is polymerized intercarrier PUCCH overlap;
Fig. 7 is the PUCCH transformat schematic diagram of brachymemma;
Fig. 8 is the example explanation of the embodiment of the present application two;
Fig. 9 is the flow chart of the embodiment of the present application two;
Figure 10 is the example explanation that the embodiment of the present application two is polymerized intercarrier PUCCH overlap;
Figure 11 is the basic structure schematic diagram of user terminal in the application.
Embodiment
In order to make the object of the application, technological means and advantage clearly understand, below in conjunction with accompanying drawing, the application is described in further details.
The application is for different duplex mode and the carrier aggregation across eNB, propose the HARQ-ACK transmission of downlink data and related power controls, multichannel is overlapping time processing method and user terminal, make HARQ-ACK of each polymerization carrier wave up-downgoing data can effectively feed back to corresponding eNB.
Fig. 3 is different duplex mode in the application, flow chart across the carrier aggregation of eNB, comprises the following steps:
Step 301:UE receives aggregation cell configuration information.
This configuration information comprises the aggregation cell of each eNB, the duplex mode of aggregation cell, participates in the Pcell information of each eNB of UE carrier aggregation.For the carrier aggregation across eNB, the Pcell participating in each eNB of UE carrier aggregation refers to: each eNB specifies a cell to be used for transmitting HARQ-ACK feedback information, is referred to as the Pcell of this eNB.Further, if the duplex mode of polymerization carrier wave is different and Pcell adopts TDD duplex mode in the eNB participating in carrier aggregation, then the main FDD Scell information of this eNB is comprised further at configuration information.Main FDD Scell refers to that the duplex mode of polymerization carrier wave in eNB is different, and during Pcell employing TDD duplex mode, eNB specifies a FDD cell to be the HARQ-ACK information that the PUCCH of main FDD Scell, this cell can transmit the PDSCH/PDCCH that FDD cell receives.
Step 302:UE receives PDCCH and PDSCH data from each Cell respectively, and determines corresponding HARQ-ACK information;
Step 303:UE, according to the configuration information received in 301, determines the timing relationship between each CC downlink data to its HARQ-ACK up channel of transmission and the CC for transmitting corresponding HARQ-ACK information, the HARQ-ACK of feeding back downlink data on the CC determined.
Preferably, the CC of the CC and its HARQ-ACK of feedback that transmit PDSCH/PDCCH belongs to identical eNB, such as eNB
icertain cell on feedback from eNB
ithe HARQ-ACK of the PDSCH/PDCCH that middle CC receives, wherein i is the sequence number of eNB.Like this, the HARQ-ACK avoiding an eNB to send PDSCH/PDCCH distributes corresponding resource by another eNB, if need retransmission downlink data, also can avoid another eNB schedule re-transmission data.
Further, in order to send HARQ-ACK feedback information when ensureing that UE is different on two cell, in the application, make Pcell and main FDD Scell, or on the Pcell of different e NB, transmission HARQ-ACK feedback information is separated in time.
The following detailed description of different duplex mode, feed back timing and transmission across the HARQ-ACK of PDSCH/PDCCH during eNB.
Embodiment one
The timing of HARQ-ACK feedback and the transmission of carrier aggregation UE, PDSCH and PDCCH are carried out in the present embodiment discussion in same eNB.In this case, in existing HARQ-ACK feedback method, if Pcell adopts TDD duplex mode, time in Scell containing FDD cell, for the part descending sub frame of FDD cell, can not find the up channel of its HARQ-ACK information of transmission, cause the wasting of resources.
Propose when the Pcell of eNB adopts TDD mode and contains FDD cell in Scell in the present embodiment, timing relationship under the HARQ timing obedience FDD of FDD cell PDSCH and PDCCH, if when transmitting HARQ-ACK, Pcell is upper is sub-frame of uplink, then on Pcell, feed back HARQ-ACK, otherwise feed back HARQ-ACK on main FDD Scell.In other words, when having sub-frame of uplink on TDD cell He on FDD cell, and when HARQ-ACK transmits on PUCCH, the PUCCH of TDD cell feeds back the HARQ-ACK of PDSCH and PDCCH of each CC under eNB, when having sub-frame of uplink on TDD cell He on FDD cell, and HARQ-ACK is at PUSCH(Physical Uplink Shared Channel) on when transmitting, the HARQ-ACK of PDSCH and PDCCH of each CC under the PUSCH of correspondence feeds back eNB; And work as sub-frame of uplink only at FDD cell sometimes, the HARQ-ACK of PDSCH and PDCCH of each FDD cell under FDD cell feeds back eNB.
Fig. 4 is the particular flow sheet of HARQ-ACK information feedback method in the present embodiment, and the method comprises:
Step 401:UE receives the configuration information of aggregation cell.
Configuration information comprises the member carrier sequence number in eNB, the carrier wave sequence number of Pcell, the frame structure of Pcell, the carrier wave sequence number of main FDD Scell.In the present embodiment, Pcell adopts TDD duplex mode, and each CC comprises TDDcell and FDD cell.
Step 402:UE receives PDCCH and PDSCH data from each FDD Cell respectively, and determines corresponding HARQ-ACK information.
Step 403: for PDCCH and PDSCH received at subframe n-4, the subframe n of Pcell or main FDD Scell transmits its HARQ-ACK.
Particularly, when at PUCCH(Physical Uplink Control Channel) upper transmission HARQ-ACK time, if the subframe n of Pcell is sub-frame of uplink, then on the subframe n of Pcell, transmit the HARQ-ACK of PDCCH and PDSCH; If the subframe n of Pcell is descending sub frame, then on the subframe n of main FDD Scell, transmit the HARQ-ACK of PDCCH and PDSCH.
Timing and the transmission means of HARQ-ACK in the present embodiment is illustrated below by Fig. 5.Wherein, in figure, the grid of D mark represents descending sub frame, and the grid of U mark represents sub-frame of uplink, and Pcell is TDD duplex mode, and frame structure is uplink-downlink configuration 0.According to the timing relationship between FDD PDSCH/PDCCH to its HARQ-ACK, on the descending sub frame 0 of FDD Scell, the HARQ-ACK of PDSCH/PDCCH should transmit on sub-frame of uplink 4, in TDD Pcell, subframe 4 is up, if then transmit HARQ-ACK on PUCCH, on FDD Scell descending sub frame 0, the HARQ-ACK of PDSCH/PDCCH feeds back in the subframe 4 of Pcell.According to the timing relationship between FDD PDSCH/PDCCH to its HARQ-ACK, on the descending sub frame 1 of FDD Scell, the HARQ-ACK of PDSCH/PDCCH should transmit on sub-frame of uplink 5, and in TDD Pcell, subframe 5 is descending sub frame, on the descending sub frame 1 of then FDD Scell, the HARQ-ACK of PDSCH cannot feed back on Pcell, and the subframe 5 of FDD Scell is fed back.
By the way, engrave when needing the subframe feeding back HARQ-ACK information, when Pcell be descending sub frame cannot feed back HARQ-ACK time, HARQ-ACK information can be transmitted on the sub-frame of uplink of main FDD Scell, thus ensure that all descending sub frames of FDD Scell can find the sub-frame of uplink of its HARQ-ACK information of transmission, thus avoid the wasting of resources.
Further, because the Timing Advance (Timing Advance) of each CC may not reason on an equal basis, the sub-frame of uplink of each cell may not be complete matching in time, like this, when needing to send HARQ-ACK information on the PUCCH of plural cell, the PUCCH that just there will be a cell does not also terminate, the situation that the PUCCH on another cell has started, the PUCCH of two cell can be overlapped, as shown in Figure 6.In figure, the grid of D mark represents descending sub frame, and the grid of U mark represents sub-frame of uplink, and Pcell is TDD duplex mode, and frame structure is uplink-downlink configuration 0, and shaded box represents the sub-frame of uplink that need send HARQ-ACK feedback information.In figure in 601 and 602 tab area, the PUCCH of two cell just may send simultaneously.
Situation about simultaneously sending to prevent above-mentioned PUCCH occurs, can configure the PUCCH transformat of the subframe use brachymemma that the subframe second half section overlaps, thus avoid overlapping situation to occur.The mode that concrete configuration mode can adopt high-level signaling to configure or pre-set.When adopting high-level signaling configuration, can according to the current sync time delay relation between different cell, determine the subframe that subframe second half section under this synchronization delayed time relation can overlap to configure by high-level signaling the PUCCH transformat that these subframes use brachymemma.Such as, situation shown in Fig. 6, the synchronization delayed time of Scell is lower than Pcell, the transmission of each sub-frame of uplink of Scell will in advance in the sub-frame of uplink of Pcell, in this case the subframe 4 of Pcell and the second half section of subframe 9 may overlap, and therefore can configure the PUCCH transformat that the subframe 4 of Pcell and subframe 9 use brachymemma.When adopting the mode pre-set, can according to synchronization delayed time relation all possible between different cell, determine likely in the subframe that the second half section overlaps, pre-set the PUCCH transformat that these subframes use brachymemma.Such as, shown in Fig. 6 comprise Pcell and Scell and Pcell is the situation of TDD uplink-downlink configuration 0, the timing of Scell in advance in Pcell, also may may be later than Pcell, if the synchronization delayed time of Scell is in advance in Pcell, then the subframe 4 of Pcell and subframe 9 second half section overlap, if the timing of Scell is later than Pcell, then the subframe 1 of Scell and subframe 6 second half section overlap, visible, under all possible timing relationship, the subframe that second half section may overlap is the subframe 4 of Pcell and the subframe 1 of subframe 9 and Scell and subframe 6, therefore, the PUCCH that can pre-set in the subframe 1 and 6 of Equations of The Second Kind eNB always adopts the transformat of brachymemma, when the subframe 4 and 9 of first kind eNB transmits PUCCH, also the transformat of brachymemma is used.Wherein, the PUCCH transformat of brachymemma can be as shown in Figure 7.In Fig. 7, a subframe is made up of 14 OFDM symbol, and the transmission of the PUCCH of brachymemma uses OFDM symbol 0 ~ 12 to transmit, and OFDM symbol 13 does not use.
In existing standard, UE can control to adjust the correction value δ indicated by state value g (n-1) and TPC command according to the PUCCH power of a upper subframe
pUCCH, determine adjustment state value g (n) of present sub-frame, thus dynamically adjust PUCCH power.For FDD, g (n)=g (n-1)+δ
pUCCH(n-4).According to the process in the present embodiment, correction value can not be added simply to obtain the adjustment state value of present sub-frame on the adjustment state value of a upper sub-frame of uplink, because the PUCCH of a upper subframe and the PUCCH of this subframe may transmit on different carrier waves, PUCCH power should be revised based on the PUCCH power of identical member carrier.For this reason, for Pcell and main FDD Scell arranges respective adjustment state value, g is respectively
pcell(n) and g
fScelln (), the adjustment condition mode for main FDD Scell is: if the subframe n of Pcell is sub-frame of uplink, then g
fScell(n)=g
fScell(n-1); Otherwise, according to existing mode according to g
fScelland δ (n-1)
pUCCH(n-4) g is determined
fScell(n).
In addition, if the subframe n of Pcell is sub-frame of uplink, the control channel then dispatching the PUSCH on FDD Scell subframe n need contain UL DAI order, be used to refer to the maximum of the descending sub frame number feeding back HARQ-ACK on subframe n, in the present embodiment, on scheduling subframe n, the PUSCH of FDD Scell is positioned at descending sub frame n-4, then descending sub frame n-4 dispatches in the control channel of the PUSCH of FDD cell needs to add UL DAI order, and this order is made up of two bits.According to existing standard, in same descending sub frame, the DCI format 1A of scheduling PDSCH and the DCI format 0 of scheduling PUSCH have identical bit number, for this reason, dispatch the DCI format 1A of PDSCH on FDDScell in subframe n-4 to need to add 2 bits, these two bits can be used to the resource shared by PUCCH indicating transmission PDSCH HARQ-ACK, if namely subframe n+4 is the sub-frame of uplink of Pcell, then the control channel dispatching PDSCH on FDD Scell descending sub frame n includes two bits and indicates resource shared by the corresponding PUCCH of this PDSCH.In addition, Pcell and main FDD Scell has the N_PUCCH (1) of each self-indication PUCCH format 1,1a and 1b resource starting point.
Embodiment two
When the present embodiment discussion carries out carrier aggregation across eNB, the HARQ-ACK feedback timing of PDSCH/PDCCH and transmission.If adopt the eNB of TDD mode to be that first kind eNB, Pcell adopt the eNB of FDD mode to be Equations of The Second Kind eNB for specific UE, a Pcell.Correspond to the situation across eNB carrier aggregation in the application, determine the HARQ-ACK feedback timing of each eNB PDSCH/PDCCH and transmit based on following three principles:
First, eNB determines whether to retransmit according to the HARQ-ACK of the PDSCH/PDCCH sent received, therefore, when design of feedback timing and transmission, first to ensure that each eNB can receive the HARQ-ACK of sent PDSCH/PDCCH, therefore, each eNB send PDSCH/PDCCH HARQ-ACK should transmit on the up CC of identical eNB, thus ensure eNB can receive oneself send the HARQ-ACK of PDSCH and PDCCH;
Secondly, the minimum CCE index of the PDCCH that different eNB dispatching office uses and can not being shared between eNB by the ARI territory in the PDCCH of scheduling PDSCH, namely eNB does not know that another eNB dispatches relevant minimum CCE(Control Channel Element) index and ARI territory, and the resource that the HARQ-ACK of PDSCH/PDCCH uses is determined by minimum CCE index or ARI territory, therefore, each eNB send PDSCH/PDCCH HARQ-ACK should transmit on the up CC of identical eNB, thus the HARQ-ACK of the PDSCH/PDCCH avoiding an eNB to send is by the situation of another eNB scheduling resource,
3rd, as previously mentioned, when UE is different, on two cell, send HARQ-ACK feedback information, therefore, first kind eNB send the HARQ-ACK of PDSCH/PDCCH and Equations of The Second Kind eNB send PDSCH/PDCCH HARQ-ACK should distinguish in time.
Based on above-mentioned three principles, for the situation of carrying out carrier aggregation in the present embodiment across eNB, when determining the cell of transmitting HARQ-ACK information, the Pcell of each eNB transmits the HARQ-ACK information of PDSCH and PDCCH in this eNB on each CC.And about the timing relationship of HARQ-ACK, for 7 kinds of uplink-downlink configuration of TDD, subframe 0,1,5,6 is all descending sub frame, therefore, the present embodiment propose when UE across eNB carrier aggregation in comprise first kind eNB and Equations of The Second Kind eNB simultaneously time, for Equations of The Second Kind eNB, at the sub-frame of uplink 0 of its Pcell, 1,5 and/or 6 transmitting HARQ-ACK, so no matter which kind of uplink-downlink configuration the HARQ of first kind eNBPDSCH/PDCCH follows, and the up channel of the transmitting HARQ-ACK of FDD eNB all can not be overlapping with the up channel of the transmitting HARQ-ACK of TDD eNB.
Particularly, when Equations of The Second Kind eNB utilizes sub-frame of uplink 0,1, the 5 and/or 6 transmitting HARQ-ACK of Pcell, sub-frame of uplink 0 and sub-frame of uplink 5 respectively can feed back the HARQ-ACK of 3 descending sub frames, and sub-frame of uplink 1 and sub-frame of uplink 6 respectively feed back the HARQ-ACK of 2 descending sub frames; Or sub-frame of uplink 0 and sub-frame of uplink 5 respectively can feed back the HARQ-ACK of 2 descending sub frames, and sub-frame of uplink 1 and sub-frame of uplink 6 respectively feed back the HARQ-ACK of 3 descending sub frames; Or sub-frame of uplink 0 and sub-frame of uplink 5 respectively can feed back the HARQ-ACK of 4 descending sub frames, and sub-frame of uplink 1 and sub-frame of uplink 6 respectively feed back the HARQ-ACK of 1 descending sub frame; Or sub-frame of uplink 0 and sub-frame of uplink 5 respectively can feed back the HARQ-ACK of 1 descending sub frame, and sub-frame of uplink 1 and sub-frame of uplink 6 respectively feed back the HARQ-ACK of 4 descending sub frames.
Timing and the transmission means of HARQ-ACK in the present embodiment is illustrated below by Fig. 8.Wherein, in figure, the grid of D mark represents descending sub frame, and the grid of U mark represents sub-frame of uplink, and Pcell is TDD duplex mode, and frame structure is uplink-downlink configuration 0.On the descending sub frame 0 of FDD Scell, the HARQ-ACK of PDSCH and PDCCH can transmit on sub-frame of uplink 5, on descending sub frame 1 and 2, the HARQ-ACK of PDSCH and PDCCH can transmit on sub-frame of uplink 6, descending sub frame 3, on 4 and 5, the HARQ-ACK of PDSCH and PDCCH can transmit on sub-frame of uplink 0, and on descending sub frame 6 and 7, the HARQ-ACK of PDSCH and PDCCH can transmit on sub-frame of uplink 1.Subframe 0,1,5,6 is the member carrier of TDD is all descending sub frame at duplex mode, so when utilizing above-mentioned timing to carry out HARQ-ACK information transmission, the up channel of the transmitting HARQ-ACK of FDD eNB can not be overlapping with the up channel of the transmitting HARQ-ACK of TDD eNB.Fig. 9 is the specific implementation flow chart of the HARQ-ACK information feedback method of the present embodiment, and the method comprises:
Step 901:UE receives the configuration information of polymerization eNB, and this configuration information comprises the carrier wave sequence number of the Pcell of the specific each eNB of UE, and duplex mode;
Step 902:UE receives PDCCH and the PDSCH data that Pcell is the eNB transmission of FDD, and determines corresponding HARQ-ACK information;
Step 903: be the eNB of FDD for Pcell, the PDSCH of the PDCCH instruction received at subframe n-k and the PDCCH discharged at the indicating downlink SPS that subframe n-k receives, the subframe n of this Pcell transmits its HARQ-ACK; Be the eNB of TDD for Pcell, the timing relationship between the PDSCH/PDCCH to its HARQ-ACK that under can determining this eNB according to existing mode, each CC adopts, and on corresponding Pcell, the transmission of HARQ-ACK information is carried out according to the timing relationship determined.
Wherein, k ∈ K, the set { k that K is made up of M element
0, k
1.., k
m-1, it is relevant with the sequence number of subframe n, and a table in table 2-1 ~ 2-4 can be adopted to provide concrete value.
The descending relation integration sequence number K:{k of table 2-1
0, k
1.., k
m-1}
| n | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 7,6,5 | 5,4 | - | - | - | 7,6,5 | 5,4 | - | - | - |
Or,
The descending relation integration sequence number K:{k of table 2-2
0, k
1.., k
m-1}
| n | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 7,6 | 6,5,4 | - | - | - | 7,6 | 6,5,4 | - | - | - |
Or,
The descending relation integration sequence number K:{k of table 2-3
0, k
1.., k
m-1}
| n | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 7,6,5,4 | 4 | - | - | - | 7,6,5,4 | 4 | - | - | - |
Or,
The descending relation integration sequence number K:{k of table 2-4
0, k
1.., k
m-1}
| n | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| k | 7 | 7,6,5,4 | - | - | - | 7 | 7,6,5,4 | - | - | - |
By the way, for comprising the situation of first kind eNB and Equations of The Second Kind eNB across eNB carrier aggregation, by making Equations of The Second Kind eNB in subframe 0,1, HARQ-ACK information is transmitted on 5 and/or 6, thus make the time of Equations of The Second Kind eNB and first kind eNB transmitting HARQ-ACK information staggers, ensure not increase on the basis of hardware complexity, make Equations of The Second Kind eNB all descending sub frames can find transmission its HARQ-ACK information sub-frame of uplink, effectively utilize downlink bandwidth, improve the performance of system.
Simultaneously, similar with embodiment one, due to the difference of each eNB Timing Advance (Timing Advance), and the reason such as eNB back haul link (Backhaul) is imperfect, each eNB sub-frame of uplink may not be complete matching in time, and so just cause the PUCCH of an eNB also not terminate, the PUCCH on another eNB starts, the PUCCH of two cell can be overlapped, as shown in Figure 10.In figure, the grid of D mark represents descending sub frame, and the grid of U mark represents sub-frame of uplink, and Pcell is TDD duplex mode, and frame structure is uplink-downlink configuration 0, and shaded box represents the sub-frame of uplink that need send HARQ-ACK feedback information.In figure in 1001 and 1002 tab area, the PUCCH of two cell may send simultaneously, sends while preventing this PUCCH, configures by high-level signaling the PUCCH transformat that a Pcell uses brachymemma, avoids overlapping situation to occur.For the example of this figure, configure the PUCCH transformat that the subframe 4 of eNB1Pcell and subframe 9 use brachymemma exactly.Except adopting the method for high-level signaling adaptive configuration, the PUCCH in the subframe 1 and 6 of Equations of The Second Kind eNB can be established always to adopt the transformat of brachymemma, when the subframe 4 and 9 of first kind eNB transmits PUCCH, also use the transformat of brachymemma.
In the present embodiment, to modify, if to a specific UE to PUCCH power adjustment state value equally, the Pcell of eNB1 adopts TDD mode, when the Pcell of eNB2 adopts FDD mode, when when between eNB1 and eNB2, carrier aggregation is in state of activation, the PUCCH power adjustment state value of eNB2 is g
f(n), then just like fruit frame n ∈ C, C={2,3,4,7,8,9}, then g
f(n)=g
f(n-1).
Further, when the Pcell subframe 0 of Equations of The Second Kind eNB, 1, when transmitting the HARQ-ACK information of PDSCH and PDCCH on 5 and/or 6, for the corresponding subframe 0 of schedules second type eNB, 1, the control channel of the PUSCH on 5 and/or 6 need contain UL DAI order, be used to refer to the maximum of the descending sub frame number feeding back HARQ-ACK on subframe n, according to the present embodiment, scheduling sub-frame set { 0, 1, 5, the PUSCH of the upper FDD Scell of 6} is positioned at descending sub frame set { 1, 2, 6, in 7}, then descending sub frame set { 1, 2, 6, 7} dispatches in the control channel of the PUSCH of FDD cell and needs to add UL DAI order, this order is made up of two bits.Simultaneously, identical with the bit number of the DCI format 0 for dispatching PUSCH for the DCI format 1A dispatching PDSCH for ensureing on same descending sub frame, on scheduling FDD Scell descending sub frame n, the control channel of PDSCH also includes two bit indicating downlink DAI information, and the definition of descending DAI is identical with existing standard.
Adopt the method for the present embodiment, descending HARQ procedure number is 11, and therefore dispatching HARQ process number Command field bit number in the control channel of PDSCH is 4, identical with the bit number of TDD mode HARQ process number.
In addition, be all Equations of The Second Kind eNB when participating in UE across the eNB of eNB carrier aggregation, when namely the Pcell of eNB be FDD duplex mode, the method that the HARQ-ACK feedback timing of each eNB PDSCH/PDCCH also can adopt similar the present embodiment to describe with transmission.If participation UE is Equations of The Second Kind eNB across the eNB of eNB carrier aggregation, eNB1 and eNB2 respectively, eNB1 is according to the method described in Fig. 9, the HARQ-ACK of feedback PDSCH/PDCCH, the PDSCH that the PDCCH received at eNB2 subframe n-k+m is indicated and the PDCCH discharged at the indicating downlink SPS that subframe n-k+m receives, the subframe n+m of this Pcell transmits its HARQ-ACK, m and can be 2 or 3, wherein in k employing table 2-1 ~ 2-4, a table provides concrete value.The object choosing m makes the sub-frame of uplink eNB1 and eNB2 feeding back HARQ-ACK can not be overlapping.
The above-mentioned specific implementation being HARQ-ACK information feedback method in the application.Present invention also provides a kind of wireless terminal, may be used for implementing above-mentioned HARQ-ACK feedback method.Figure 11 is the general structure schematic diagram of wireless terminal in the application.As shown in figure 11, this equipment comprises: configuration information receiving element, HARQ-ACK information determination unit and HARQ-ACK information transmission unit.
Wherein, configuration information receiving element, for receiving the configuration information of aggregation cell; HARQ-ACK information determination unit, for receiving PDCCH and PDSCH data from each aggregation cell cell participating in carrier aggregation, and determines corresponding HARQ-ACK information; HARQ-ACK information transmission unit, for the configuration information received according to configuration receiving element, determine that each each aggregation cell cell participating in carrier aggregation receives the HARQ timing relationship of PDCCH and PDSCH data, and transmit the HARQ-ACK information of phase PDCCH and PDSCH.
According to technique scheme disclosed in the present application, for PDSCH and PDCCH that an eNB sends, the cell of identical eNB is utilized to feed back its HARQ-ACK information, thus ensure that eNB can determine HARQ-ACK resource requirement according to the minimum CCE index information of scheduling PDCCH and the instruction of ARI territory, to continue the resource distribution mode continuing to use existing HARQ-ACK feedback.Further, for in same eNB and carry out the situation of carrier aggregation across eNB, the HARQ-ACK of the PDSCH/PDCCH of all subframes of each polymerization carrier wave can find corresponding PUCCH, the PUCCH of each polymerization carrier wave can not overlap in time simultaneously, thus effectively utilize downlink bandwidth, improve the performance of system.In addition, the such scheme that the application proposes, changes very little to existing equipment or system, can not affect the compatibility of equipment, and it realizes not only simple but also efficient.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (16)
1. a HARQ-ACK feedback method for carrier aggregation system downlink data, is characterized in that, comprising:
UE receives the configuration information of aggregation cell; Described configuration information comprises the aggregation cell mark of each eNB participating in described UE carrier aggregation, the duplex mode of aggregation cell, for the carrier aggregation across eNB, described configuration information comprises the Pcell for transmitting HARQ-ACK information under the corresponding eNB that each eNB specifies further;
UE receives PDCCH and PDSCH data from each aggregation cell Gell participating in carrier aggregation respectively, and determines corresponding HARQ-ACK information;
UE, according to described configuration information, determines the HARQ-ACK timing relationship of each Gell PDSCH and PDCCH and transmits the cell of described HARQ-ACK information;
The Gell determined transmits described HARQ-ACK information according to described timing relationship.
2. method according to claim 1, is characterized in that, when carrier aggregation under the carrier aggregation of described UE is same eNB, if the Pcell of this eNB adopt TDD mode and SGell comprises FDD SGell time,
Comprise eNB further at described configuration information and descend at it main FDDScell selected in all FDD SGell;
When determining the Gell of described timing relationship and transmitting HARQ-ACK information, the HARQ timing relationship of the PDSCH/PDCCH of described FDD SGell adopts the HARQ timing relationship of FDD; When having sub-frame of uplink on the Pcell at described eNB He on described FDD SGell, and when feeding back the HARQ-ACK information of each Gell PDSCH/PDCCH on PUCCH, the PUCCH of this Pcell feeds back the HARQ-ACK information of each Gell under corresponding eNB, when sub-frame of uplink is only at described FDD SGell, the main FDD SGell indicated feeds back the HARQ-ACK information of each FDD SGell in configuration information.
3. method according to claim 2, it is characterized in that, when the subframe n of the Pcell of described arbitrary eNB is sub-frame of uplink, on execution cost main FDD SGell subframe n, the control channel of PUSCH comprises the UL DAI order of 2 bits, and described UL DAI order is used to indicate the maximum of the descending sub frame number described main FDD SGell subframe n feeding back HARQ-ACK information.
4. method according to claim 2, is characterized in that, the method comprises further: when carrying out power to the PUCCH for transmitting HARQ-ACK information and controlling according to the power of the PUCCH power adjustment PUCCH of identical Gell.
5. method according to claim 4, is characterized in that, for the main FDD Scell of described arbitrary eNB, when subframe n is when the Pcell of eNB is sub-frame of uplink, and the power adjustment state value g of the subframe n of described main FDD SGell
fScell(n)=g
fScell(n-1).
6. method according to claim 1, is characterized in that, for the carrier aggregation across eNB, determines that the Pcell of each eNB is for transmitting the HARQ-ACK information of each cell PDSCH/PDCCH under this eNB.
7. method according to claim 6, it is characterized in that, for the carrier aggregation across eNB, when determining the cell of described timing relationship and transmitting HARQ-ACK information, if the Pcell participating in arbitrary eNB of carrier aggregation adopts FDD mode, and the Pcell that there are other eNB adopts TDD mode, then the HARQ-ACK information of each cell PDSCH/PDCCH under determining to transmit corresponding eNB on the sub-frame of uplink 0,1,5 and/or 6 of the Pcell of described arbitrary eNB.
8. method according to claim 7, it is characterized in that, the HARQ-ACK of each feedback 3 descending sub frames on the sub-frame of uplink 0 and sub-frame of uplink 5 of the Pcell of described arbitrary eNB, at the sub-frame of uplink 1 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 62 descending sub frames; Or,
At the sub-frame of uplink 0 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 52 descending sub frames, at the sub-frame of uplink 1 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 63 descending sub frames; Or,
At the sub-frame of uplink 0 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 54 descending sub frames, at the sub-frame of uplink 1 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 61 descending sub frame; Or,
At the sub-frame of uplink 0 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 51 descending sub frame, at the sub-frame of uplink 1 of the Pcell of described arbitrary eNB and the HARQ-ACK of each feedback of sub-frame of uplink 64 descending sub frames.
9. method according to claim 7, it is characterized in that, under the sub-frame of uplink 0,1,5 and/or 6 of the Pcell of described arbitrary eNB transmits corresponding eNB, the HARQ-ACK information of each cell comprises: in described arbitrary eNB, for PDSCH and PDCCH received at subframe n-k, subframe n transmits its HARQ-ACK information; Wherein,
Or,
Or,
Or,
10. method according to claim 7, is characterized in that, the method comprises further: when carrying out power to the PUCCH for transmitting HARQ-ACK information and controlling according to the PUCCH power adjustment PUCCH power of identical cell.
11. methods according to claim 10, it is characterized in that, for the carrier aggregation across eNB, if the Pcell of arbitrary eNB adopts FDD mode, and when there is the Pcell employing TDD mode of other eNB, the PUCCH power adjustment state value of the subframe 2,3,4,7,8 or 9 of the Pcell of described arbitrary eNB is g
f(n)=g
f(n-1).
12. methods according to claim 7, it is characterized in that, for the carrier aggregation across eNB, if the Pcell of arbitrary eNB adopts FDD mode, and when there is the Pcell employing TDD mode of other eNB, in the subframe 0,1,5 and 6 of the arbitrary eNB Pcell of execution cost, the control channel of PUSCH comprises the UL DAI order of dibit, is used to indicate the maximum of the descending sub frame number described Pcell subframe n feeding back HARQ-ACK information.
13. methods according to claim 6, it is characterized in that, for the carrier aggregation across eNB, when determining the cell of described timing relationship and transmitting HARQ-ACK information, if the Pcell participating in all eNB of carrier aggregation all adopts FDD mode, then determine the HARQ-ACK information of each cellPDSCH/PDCCH under each eNB transmits eNB in mutually different subframe.
14. methods according to claim 13, it is characterized in that, when the Pcell of the eNB participating in carrier aggregation all adopts FDD mode, one of them eNB transmits HARQ-ACK information on the sub-frame of uplink 0,1,5 and/or 6 of Pcell, and another eNB transmits HARQ-ACK information on the sub-frame of uplink 2,3,4,7,8 and/or 9 of Pcell.
15. according to described method arbitrary in claim 1 to 14, it is characterized in that, when the cell determined transmits described HARQ-ACK information according to described timing relationship, when sending HARQ-ACK information and wherein any two cell exist overlapping region in time for the subframe sending HARQ-ACK information on plural cell, then the subframe occurring described overlapping region in the subframe second half section uses the PUCCH transformat of brachymemma.
User terminal in 16. 1 kinds of carrier aggregation systems, is characterized in that, comprises configuration information receiving element, HARQ-ACK information determination unit and HARQ-ACK information transmission unit;
Described configuration information receiving element, for receiving the configuration information of aggregation cell;
Described HARQ-ACK information determination unit, for receiving PDCCH and PDSCH data from each aggregation cell cell participating in carrier aggregation, and determines corresponding HARQ-ACK information;
Described HARQ-ACK information transmission unit, for the described configuration information received according to described configuration receiving element, determine that each each aggregation cell cell participating in carrier aggregation receives PDCCH and PDSCH data HARQ timing relationship, transmit described HARQ-ACK information according to described timing relationship.
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Application publication date: 20150318 |