CN104811269A - Method and device for transmitting aperiodic CSI - Google Patents
Method and device for transmitting aperiodic CSI Download PDFInfo
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Abstract
The invention discloses a method for transmitting aperiodic CSI. The method comprises that UE receives configuration information of A-CSI, and when two CSI subframe sets are configured in a cell, configuration information of a CSI subframe set and information of a CSI subframe set for indicating an A-CSI report are included; UE receives UL Grant, determines CSI reference resource for each cell that trigger A-CSI, determines measuring channels and interference resources according to the CSI reference resource, and further obtains CSI information of the cell by calculation; and the UE transmits the A-CSI of cells triggered at present in PUSCH. According to the method of the invention, the CSI subframe set of triggered A-CSI can be determined, CSI reference resource is determined, the aperiodic CSI can be scheduled on all downlink subframes of the PUSCH, and flexibility of resource distribution is improved.
Description
Technical field
The present invention relates to wireless communication system, relate to the method and apparatus transmitting CSI aperiodic in the system of being polymerized FDD community and TDD cell in particular.
Background technology
Long Term Evolution (LTE) system of 3GPP standardization body supports Frequency Division Duplexing (FDD) (FDD) and time division duplex (TDD) two kinds of duplex modes.As shown in Figure 1, to FDD system, the length of each radio frames is 10ms, and comprising 10 length is the subframe of 1ms, and the time slot being 0.5ms by two continuous print length is formed, and namely a kth subframe comprises time slot 2k and time slot 2k+1, k=0,1 ... 9.As shown in Figure 2, to TDD system, it is the field of 5ms that the radio frames of each 10ms is divided into two length.Each field comprises the time slot and 3 special domain that 8 length are 0.5ms, i.e. descending pilot frequency time slot (DwPTS), protection interval (GP) and uplink pilot time slot (UpPTS), the length of these 3 special domain be 1ms.Each subframe is made up of two continuous print time slots, and namely a kth subframe comprises time slot 2k and time slot 2k+1, k=0, and 1 ... 9.A downlink times interval (TTI) is exactly be defined in a subframe.
7 kinds of upstream and downstream configurations are supported in TDD system, as shown in table 1.Here, D represents descending sub frame, and U represents sub-frame of uplink, and S represents the above-mentioned special subframe comprising 3 special domain.
The upstream and downstream configuration of table 1LTE TDD
Front n OFDM symbol of each descending sub frame may be used for transmitting Downlink Control Information, Downlink Control Information comprises Physical Downlink Control Channel (Physical Downlink Control Channel, PDCCH) and other control informations, wherein, n equals 0,1,2,3 or 4; Remaining OFDM symbol can be used for transmitting PDSCH(PhysicalDownlink Shared Channel, Physical Downlink Shared Channel) or strengthen PDCCH(EPDCCH).In LTE system, PDCCH/EPDCCH is Downlink Control Information (the Downlink Control Information that carrying distributes uplink channel resources or down channel resources, DCI), downstream grants signaling (DL Grant) and uplink authorization signaling (UL Grant) is called.The authorization signaling of different UEs independently sends, and DL Grant and UL Grant independently sends.
In existing LTE/LTE-A system, UE can according to the configuration of eNB, and cycle or aperiodic fed-back channel status instruction (Channel State Information, CSI) information, so that eNB obtains the down channel situation of UE.For CSI feedback aperiodic, triggered by the CSI request be included in UL Grant (CSI Request) bit, the Physical Uplink Shared Channel PUSCH distributed in a sub-frame of uplink sends simultaneously upstream data and aperiodic CSI(A-CSI) information, or UE scheduling PUSCH also can completely for sending A-CSI.
In the enhancing system of LTE system, being obtain larger bandwidth of operation, i.e. carrier aggregation (CA) by combining multiple unit carrier wave (CC), forming the descending and up link of communication system, thus support higher transmission rate.To a UE, base station can configure it and work in multiple Cell, and one of them is main Cell(Pcell), and other Cell are called time Cell(Scell).
To Pcell, base station can configure two CSI subframe collection CCSI for UE, i(i=0 or 1), thus UE can measure and report the CSI information of these two CSI subframe collection respectively.Here, a descending sub frame can not belong to above-mentioned two CSI subframe collection simultaneously.In Rel-10/11LTE system, the division of above-mentioned two CSI subframe collection is only for Pcell.According to existing CSI trigger mechanism, an A-CSI feedback only triggers the CSI report of one of them CSI subframe collection.Each CSI subframe collection corresponding, first UE needs to determine CSI reference resources, then could carry out CSI measurement and report based on this CSI reference resources.Specifically, to downlink transfer pattern 1 ~ 9(TM1 ~ 9) and the situation of the only TM10 of a configuration CSI process, the subframe comprising the UL Grant place of CSI request is exactly the subframe at CSI reference resources place; To the situation of TM10 being configured with multiple CSI process, CSI reference resources place subframe is subframe n-n
cQI_ref, wherein n is the sub-frame of uplink index that will feed back A-CSI, n
cQI_refa fixed value, can value 4 or 5.
In order to meet the growing business demand of mobile subscriber, in LTE-A, flexible TDD reconfiguration technology obtains increasing concern, i.e. eIMTA.EIMTA is the ratio by the current sub-frame of uplink of rapid adjustment and descending sub frame, makes it more meet the ratio of current upstream traffic and downlink traffic, is conducive to improving the up-downgoing peak rate of user and improves the throughput of system.
According to current discussion result, only has the sub-frame of uplink of the uplink-downlink configuration configured according to SIB1 just likely flexibly for downlink transfer.Here, subframe variable for these up-downgoing duplex directions is become flexible sub-frame.Because the uplink-downlink configuration of each community can be different and change flexibly, the interference that the transfer of data on a descending sub frame is subject to also is different.That is, can be interference from adjacent cell downlink transfer, generally stronger; Also can be the interference from adjacent cell uplink, generally smaller.Like this, in order to fully excavate the change disturbed in descending sub frame, in eIMTA system, by configuring two CSI subframe collection, make UE can feed back CSI information respectively for each CSI subframe collection, thus optimize downlink data transmission.According to existing conclusion, in CA system, the measurement of the CSI of this two CSI subframe collection and feedback method, both may be used for Pcell, also may be used for Scell.
In the further research of LTE system, in order to improve systematic function, a follow-up study direction is the carrier aggregation system simultaneously supporting FDD and TDD.This TDD cell can be the community that have employed eIMTA technology further.In such a system, effectively support that A-CSI feedback is a problem needing to solve.
Summary of the invention
The application aims to provide a kind of method and apparatus processing CSI feedback aperiodic in carrier aggregation system.
Transmit a method of CSI aperiodic, comprising:
UE receives the configuration information of A-CSI, when a cell configuration during two CSI subframe collection, comprises the information of the configuration information of CSI subframe collection and the CSI subframe collection of an instruction A-CSI report;
UE receives UL Grant, and to the community of each triggering A-CSI, UE determines its CSI reference resources respectively, and determines according to CSI reference resources the resource measuring channel and interference, thus calculates the CSI information of this community;
UE transmits the A-CSI of each community of current triggering on PUSCH.
Preferably, to CSI subframe collection configuration cycle T ms, to the bit mapping B of the T bit of a cell configuration instruction CSI subframe collection indication information, the UL Grant detected in each subframe of instruction one-period triggers the information of the CSI subframe collection of A-CSI.
Preferably, to a current community being configured with two CSI subframe collection, obtain CSI subframe collection indication information according to the CSI subframe collection of these two configurations is implicit.
Preferably, to CSI subframe collection configuration cycle T ms, to the bit mapping B of a cell configuration instruction CSI subframe collection indication information, its length determines according to the sum of the descending sub frame of the schedulable PUSCH in one-period T, and the UL Grant detected in each subframe of instruction one-period triggers the information of the CSI subframe collection of A-CSI.
Preferably, to TDD cell, the up reference configuration of various TDD is arranged to the length of identical bit mapping B.Remembering that a up reference configuration of TDD descending sub frame number of schedulable PUSCH in cycle T is L, then can be the CSI subframe collection that front L the bit of bit mapping B is used to indicate the triggering A-CSI of the descending sub frame of each schedulable PUSCH successively.
Preferably, to the PUSCH sent on the X of community, according to the descending sub frame index sending UL Grant, the CSI subframe collection indication information according to transmission community X determines the CSI subframe collection that will feed back A-CSI, thus the A-CSI of this CSI subframe collection of feedback community Y.
Preferably, when community X does not configure two CSI subframe collection, still need the CSI subframe collection indication information of community X and two CSI subframe collection can be distinguished.
Preferably, when community X do not configure two CSI subframe collection and current to feed back the A-CSI of community X time, the CSI subframe collection indication information of community X can be ignored;
Or, during the A-CSI of the CSI subframe collection indication information of a Zhi community X instruction triggering CSI subframe collection, the just A-CSI of feedback community X.
Preferably, to the descending sub frame that can trigger PUSCH in one-period, it indicates it to trigger the CSI subframe collection information of A-CSI at the bit that CSI subframe collection indication information is corresponding; And ignore other bits.
Preferably, to the PUSCH sent on the X of community, according to the descending sub frame index sending UL Grant, determine the A-CSI of that CSI subframe collection wanting feedback target community according to the CSI subframe collection indication information of community Y, thus the A-CSI of this CSI subframe collection of feedback community Y.
Preferably, only to the current community Y being configured with two CSI subframe collection, just need the CSI subframe collection indication information of community Y and two CSI subframe collection can be distinguished.
Preferably, to the community of a transmission PUSCH, to the descending sub frame that can trigger PUSCH in one-period, it indicates it to trigger the CSI subframe collection information of A-CSI at the bit that CSI subframe collection indication information is corresponding; To other bits, still carry the indication information of effective CSI subframe collection.
Preferably, to CSI subframe collection configuration cycle T ms, to the instruction CSI subframe collection indication information bit mapping A of a cell configuration T bit, the CSI subframe collection of each sub-frame of uplink transmission A-CSI of instruction one-period.
Preferably, to CSI subframe collection configuration cycle T ms, to the CSI subframe collection indication information bit mapping A of a cell configuration instruction, its length determines according to the sum of the sub-frame of uplink in one-period T, the CSI subframe collection of the sub-frame of uplink transmission A-CSI in instruction one-period T.
Preferably, to TDD cell, the up reference configuration of various TDD is arranged to the length of identical bit mapping A.Remembering that a up reference configuration of TDD sub-frame of uplink number in cycle T is L, then can be that front L the bit of bit mapping A is used to indicate the CSI subframe collection that each sub-frame of uplink transmits A-CSI successively.
Preferably, to the PUSCH sent on the X of community, according to the sub-frame of uplink index sending PUSCH, the CSI subframe collection indication information according to transmission community X determines the CSI subframe collection that will feed back A-CSI, thus the A-CSI of this CSI subframe collection of feedback community Y.
Preferably, when community X does not configure two CSI subframe collection, still need community XCSI subframe collection indication information and two CSI subframe collection can be distinguished.
Preferably, when community X do not configure two CSI subframe collection and current to feed back the A-CSI of community X time, the CSI subframe collection indication information of community X can be ignored;
Or, during the A-CSI of the CSI subframe collection indication information of a Zhi community X instruction transmission CSI subframe collection, the just A-CSI of feedback community X.
Preferably, to the sub-frame of uplink in one-period, it indicates the CSI subframe collection information of its transmission A-CSI at the bit that CSI subframe collection indication information is corresponding; And ignore other bits.
Preferably, to the PUSCH sent on the X of community, according to the sub-frame of uplink index sending PUSCH, determine the A-CSI of that CSI subframe collection that will transmit community Y according to the CSI subframe collection indication information of community Y, thus the A-CSI of this CSI subframe collection of feedback community Y.
Preferably, only to the current community Y being configured with two CSI subframe collection, just need the CSI subframe collection indication information of community Y and two CSI subframe collection can be distinguished.
Preferably, to the community of a transmission PUSCH, to the sub-frame of uplink index that can send PUSCH in one-period, it indicates the CSI subframe collection information of its transmission A-CSI at the bit that CSI subframe collection indication information is corresponding; To other bits, still carry the indication information of effective CSI subframe collection.
Preferably, to the TDD cell in TDD-FDD CA, to TM1 ~ 9, note PUSCH place sub-frame of uplink is subframe n, CSI reference resources place subframe n-n
cQI_ref, then n
cQI_refmeet n
cQI_refbe more than or equal to 4 and subframe n-n
cQI_refit is the minimum value of an effective descending sub frame.
Preferably, to the TDD cell in TDD-FDD CA, to TM1 ~ 9, when being configured with two CSI subframe collection to TDD cell, according to the CSI subframe collection information will feeding back A-CSI, note PUSCH place sub-frame of uplink is subframe n, CSI reference resources place subframe n-n
cQI_ref, n
cQI_refmeet n
cQI_refbe more than or equal to 4 and subframe n-n
cQI_refit is the minimum value of an effective descending sub frame of this CSI subframe collection that will feed back corresponding.
Process a terminal equipment of CSI aperiodic, comprising: UL Grant detection module, CSI measurement module and up sending module, wherein,
UL Grant detection module, for the UL Grant that base stations detected sends, when receiving UL Grant, detecting its CSI request territory further and whether indicating triggering A-CSI report.
CSI measurement module, for when triggering A-CSI feedback, the sub-frame of uplink according to UL Grant place descending sub frame and its scheduling PUSCH determines the current CSI subframe collection triggering A-CSI, determines CSI reference resources, and completes the measurement of CSI.
Up sending module, for transmitting the A-CSI of each community of current triggering on PUSCH.
Adopt method of the present invention, can determine to trigger the CSI subframe collection of A-CSI, determine CSI reference resources, and be supported on all descending sub frames can dispatching PUSCH and trigger CSI aperiodic, improve the flexibility of Resourse Distribute.
Accompanying drawing explanation
Fig. 1 is the frame structure schematic diagram of FDD system;
Fig. 2 is the frame structure schematic diagram of TDD system;
Fig. 3 is flow chart of the present invention;
Fig. 4 is the flow chart with descending sub frame position instruction CSI subframe collection;
Fig. 5 is the flow chart with up subframe position instruction CSI subframe collection;
Fig. 6 is the schematic diagram one of CSI reference resources;
Fig. 7 is the schematic diagram two of CSI reference resources;
Fig. 8 is present device figure.
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.
In CA system, two CSI subframe collection can be configured on one or more community.Such as, can be that Pcell configures two CSI subframe collection, and Scell can not configure CSI subframe collection; Or, can be on Pcell, do not configure CSI subframe collection, and on Scell, be configured with two CSI subframe collection; Or, can also be on multiple community, be all configured with two CSI subframe collection.Here, CSI subframe collection different service cells configured can be identical or different.The present invention does not limit the Dou Shi FDD community, community of CA system; Or, be all TDD cell; Or, can be that existing FDD community also has TDD cell, i.e. TDD-FDD CA system.
Such as, a kind of application scenarios is to TDD-FDD CA system, and on the one hand, according to existing LTE specification, Pcell can configure two CSI subframe collection; On the other hand, to the TDD Scell working in eIMTA pattern, then according to the design of eIMTA, two CSI subframe collection also can be configured; Because the frame structure restriction of FDD and TDD, it is generally different that the CSI subframe collection on Pcell and Scell divides.Or, still for TDD-FDD CA, even if Pcell does not configure CSI subframe collection, to the TDD Scell working in eIMTA pattern, still need configuration two CSI subframe collection.Or, be still configured with two CSI subframe collection for TDD-FDD CA, TDD Pcell, and FDD Scell can not configure CSI subframe collection.
Fig. 3 is basic flow sheet of the present invention.
Step 301:UE receives the configuration information of A-CSI.When a cell configuration during two CSI subframe collection, comprise the information of the information of configuration CSI subframe collection and the CSI subframe collection of an instruction A-CSI report.
Step 302:UE receives UL Grant, and to the community of each triggering A-CSI, UE determines its CSI reference resources respectively, and determines according to CSI reference resources the resource measuring channel and interference, thus calculates the CSI information of this community.
Step 303:UE transmits the A-CSI of each community of current triggering on PUSCH.
Three preferred embodiments of the present invention are described below.
Embodiment one
TDD cell has been divided to the situation of two CSI subframe collection, such as, worked in eIMTA pattern, a kind of method all descending sub frame set Further Divisions can dispatching PUSCH is two indicate sub-frame set.Specifically, the UL Grant that the descending sub frame in an instruction sub-frame set detects is the A-CSI of a triggering CSI subframe collection; The UL Grant that descending sub frame in another instruction sub-frame set detects is the A-CSI triggering another CSI subframe collection.That is, the subframe that can trigger A-CSI is limited in a subset of all subframes in a radio frames.
The configuration cycle that note CSI subframe integrates is as T ms.Such as T equals 10, i.e. a corresponding radio frames; Or T also can be greater than 10ms, such as, T equals the CSI subframe collection configuration cycle in existing eICIC system.That is, 70 are equaled to SIB1 uplink-downlink configuration 0, T; 20 are equaled to SIB1 uplink-downlink configuration 1 ~ 5, T; 60 are equaled to SIB1 uplink-downlink configuration 6, T.Or to TDD cell, configure T according to the CSI subframe collection configuration cycle of FDD system, namely T equals 40, adopts this method, in TDD-FDD CA system, the CSI period of sub-frame of each community can be unified.
To CA system, as shown in Figure 4, the present invention proposes to arrange the information that the UL Grant detected in each subframe of a CSI subframe collection configuration cycle triggers the CSI subframe collection of A-CSI, hereinafter referred to as CSI subframe collection indication information.To each community of CA system, it can be the CSI subframe collection indication information configuring each community respectively.Or, also can be to all communities, share identical CSI subframe collection indication information.CSI subframe collection indication information can be the bit mapping B of a high-level signaling configuration, and its each bit indicates the ULGrant in corresponding subframe to trigger the information of the CSI subframe collection of A-CSI.Or, to a current community being configured with two CSI subframe collection, also CSI subframe collection indication information can be obtained according to the CSI subframe collection of these two configurations is implicit, namely the descending sub frame that first CSI subframe is concentrated, the UL Grant of A-CSI is triggered, then the A-CSI of what it triggered is first CSI subframe collection if having sent; The descending sub frame that second CSI subframe is concentrated, if having sent the UL Grant triggering A-CSI, then the A-CSI of what it triggered is second CSI subframe collection.To a community, its CSI subframe collection indication information at least determining that each descending sub frame of the PUSCH of this community of scheduling triggers the CSI subframe collection of A-CSI.Method of the present invention both may be used for the CA system be made up of multiple eIMTA community, also may be used for the CA system be made up of FDD and TDD.
The length of the bit mapping B of instruction CSI subframe collection indication information can be T bit, thus the UL Grant detected in each subframe in the instruction one-period T mapped one by one triggers the subframe collection information of A-CSI.The length of the bit mapping B of instruction CSI subframe collection indication information also can be determined according to the sum of the descending sub frame of the schedulable PUSCH in one-period T.To TDD cell, can be to the up reference configuration of each TDD respectively according to the sum of the descending sub frame of the schedulable PUSCH in its one-period to arrange the length of bit mapping B.Or, to TDD cell, in order to simplified signaling design, the up reference configuration of various TDD is arranged to the length of identical bit mapping B.Remember that a up reference configuration of TDD descending sub frame number of schedulable PUSCH in cycle T is L, then a kind of mapping method is the CSI subframe collection that front L the bit of bit mapping B is used to indicate the triggering A-CSI of the descending sub frame of each schedulable PUSCH successively.In a radio frames, the maximum number can dispatching the descending sub frame of PUSCH of the up reference configuration of various TDD is 5.So, the descending sub frame number remembering a up reference configuration of TDD schedulable PUSCH is in a radio frame F, another kind of mapping method is that F bit of the radio frames of kth in cycle T is mapped to bit in bit mapping B from index 5k successively, and hypothesis bit index is counting from 0 here.
To the PUSCH sent on the X of community, when needing the A-CSI transmitting another community Y, comprise an A-CSI of triggering cell Y, or trigger the A-CSI of the multiple communities comprising community Y simultaneously, method of the present invention is described below.The first determines the method for the CSI subframe collection of community Y, it can be the descending sub frame index according to sending UL Grant, CSI subframe collection indication information according to community X determines the CSI subframe collection that will feed back A-CSI, thus the A-CSI of this CSI subframe collection of feedback community Y.Adopt this method, no matter whether community X is configured with two CSI subframe collection, all needs the CSI subframe collection indication information of community X thus the A-CSI of two CSI subframe collection can be distinguished.When community X do not configure two CSI subframe collection and current to feed back the A-CSI of community X time, the CSI subframe collection indication information of community X can be ignored; Or, also can the A-CSI of CSI subframe collection indication information instruction triggering n-th (such as n is predefined as 0) individual CSI subframe collection of Zhi community X time, the just A-CSI of feedback community X.Or, the second determines the method for the CSI subframe collection of community Y, also can be the descending sub frame index according to sending UL Grant, the A-CSI of that CSI subframe collection wanting feedback target community is determined according to the CSI subframe collection indication information of community Y, thus the A-CSI of this CSI subframe collection of feedback community Y.Adopting this method, then can be only to the current community Y being configured with two CSI subframe collection, just needs the CSI subframe collection indication information of community Y thus can distinguish the A-CSI of two CSI subframe collection.
The implication of each bit in the one-period of the bit mapping B of instruction CSI subframe collection indication information can be different.To above-mentioned the first determine the method for the CSI subframe collection of community Y, to the community of a transmission PUSCH, sub-frame of uplink in one-period or can not trigger the descending sub frame of PUSCH, although still can take a bit at bit mapping B, ignores the bit of its correspondence; To the descending sub frame that can trigger PUSCH in one-period, it indicates it to trigger the CSI subframe collection information of A-CSI at the bit that bit mapping B is corresponding.To the above-mentioned method determining the CSI subframe collection of community Y of the second, to the community of a transmission PUSCH, to the descending sub frame that can trigger PUSCH in one-period, it indicates it to trigger the CSI subframe collection information of A-CSI at the bit that bit mapping B is corresponding; To other bits, although the A-CSI feedback of the community to this transmission PUSCH, these bits can be ignored, but when transmitting A-CSI feedback on other communities, because can not send in the subframe of UL Grant in this community, other communities still likely send the UL Grant triggering A-CSI, so these bits still can carry the indication information of effective CSI subframe collection.
Determine the method for the length of the bit mapping B indicating CSI subframe collection indication information for two kinds above correspondence, preferably, bit mapping B can be the CSI subframe collection information of the triggering A-CSI at least comprising two radio frames.Like this, the subframe that can configure the same index of different radio frame triggers the A-CSI of different CSI subframe collection respectively, thus can ensure the link performance of the A-CSI reporting each CSI subframe collection.To only have the disturbance regime of subframe 2 to be best in TDD descending reference configuration 5, radio frames, be at least two radio frames by the cycle of configuration bit Mapping B, in two radio frames, the A-CSI of different CSI subframe collection can be transmitted respectively by subframe 2.
Preferably, to TDD-FDD CA, the CSI subframe collection of A-CSI can be triggered by the corresponding respectively each descending sub frame of each bit of the PUSCH of Shi Dui FDD community, bit mapping B; To the PUSCH of TDD cell, every 5 bits of bit mapping B indicate the descending sub frame of each schedulable PUSCH in a radio frames to trigger the CSI subframe collection of A-CSI respectively.Such as, adopt this method, the CSI subframe collection of A-CSI can be triggered with the bit mapping of 10 bits, according to analysis above, to the PUSCH of TDD cell, the bit mapping of 10 bits indicates the information of the CSI subframe collection of two radio frames, ensure that the link performance of A-CSI; To FDD community, the bit mapping of 10 bits only indicates the information of the CSI subframe collection of a radio frames, but because there is not the problem that the interference to sub-frame of uplink in eIMTA strengthens in FDD system, so also can ensure the link performance of A-CSI.
Embodiment two
TDD cell has been divided to the situation of two CSI subframe collection, such as, worked in eIMTA pattern, in the discussion of eIMTA, a kind of method sub-frame of uplink set Further Division is two indicate sub-frame set.Specifically, the sub-frame of uplink in a sub-frame set is the A-CSI of a feedback CSI subframe collection; Sub-frame of uplink in another sub-frame set is the A-CSI of another CSI subframe collection of feedback.That is, the subframe can feeding back A-CSI is limited in a subset of all subframes in a radio frames.
The configuration cycle that note CSI subframe integrates is as T ms.Such as T equals 10, i.e. a corresponding radio frames; Or T also can be greater than 10ms, such as, T equals the CSI subframe collection configuration cycle in existing eICIC system.70 are equaled to SIB1 uplink-downlink configuration 0, T; 20 are equaled to SIB1 uplink-downlink configuration 1 ~ 5, T; 60 are equaled to SIB1 uplink-downlink configuration 6, T.Or to TDD cell, configure T according to the CSI subframe collection configuration cycle of FDD system, namely T equals 40, adopts this method, in TDD-FDD CA system, the CSI period of sub-frame of each community can be unified.
To CA system, as shown in Figure 5, each sub-frame of uplink that the present invention proposes to arrange a CSI subframe collection configuration cycle can feed back the information of the CSI subframe collection of A-CSI, hereinafter referred to as CSI subframe collection indication information.To each community of CA system, it can be the CSI subframe collection indication information configuring each community respectively.Or, also can be to all communities, share identical CSI subframe collection indication information.CSI subframe collection indication information can be the bit mapping A of a high-level signaling configuration, and its each bit indicates the information of the CSI subframe collection of the A-CSI that can feed back on corresponding sub-frame of uplink.To a community, its CSI subframe collection indication information at least determining that the CSI subframe collection of each sub-frame of uplink transmission A-CSI of this community.Method of the present invention both may be used for the CA system be made up of multiple eIMTA community, also may be used for the CA system be made up of FDD and TDD.
The length of the bit mapping A of instruction CSI subframe collection indication information can be T bit, thus the subframe collection information of the transmission A-CSI of the instruction one-period T mapped one by one each subframe interior.The length of the bit mapping A of instruction CSI subframe collection indication information also can be the sum of the sub-frame of uplink equaled in one-period T.To eIMTA community, can be the up reference configuration of each TDD respectively according to the sum of the sub-frame of uplink in its one-period to arrange the length of bit mapping A.Or, to eIMTA community, in order to simplified signaling design, the up reference configuration of various TDD is arranged to the length of identical bit mapping A.Remember that in a up reference configuration of TDD, sub-frame of uplink number is L, then a kind of mapping method is the CSI subframe collection that front L the bit of bit mapping A is used to indicate the transmission A-CSI of each sub-frame of uplink successively.In a radio frames, the maximum number of the sub-frame of uplink of the up reference configuration of various TDD is 6.So, remember a up reference configuration of TDD in a radio frame sub-frame of uplink number be F, another kind of mapping method is that F bit of the radio frames of kth in cycle T is mapped to bit in bit mapping A from index 6k successively, and hypothesis bit index is counting from 0 here.If consider FDD and TDD system simultaneously, then the maximum number of sub-frame of uplink is 10.
To the PUSCH sent on the X of community, when needing the A-CSI transmitting another community Y, comprise an A-CSI of triggering cell Y, or trigger the A-CSI of the multiple communities comprising community Y simultaneously, method of the present invention is described below.The first determines the method for the CSI subframe collection of community Y, it can be the sub-frame of uplink index according to sending PUSCH, CSI subframe collection indication information according to transmission community X determines the CSI subframe collection that will feed back A-CSI, thus the A-CSI of this CSI subframe collection of feedback community Y.Adopt this method, no matter whether community X is configured with two CSI subframe collection, all needs the CSI subframe collection indication information of community X thus the A-CSI of two CSI subframe collection can be distinguished.When community X do not configure two CSI subframe collection and current to feed back the A-CSI of community X time, the CSI subframe collection indication information of community X can be ignored; Or, during the A-CSI of the CSI subframe collection indication information of Zhi community X instruction transmission n-th (such as n is predefined as 0) individual CSI subframe collection, the just A-CSI of feedback community X.Or the second determines the method for the CSI subframe collection of community Y, also can being the sub-frame of uplink index according to sending PUSCH, determining the A-CSI of that CSI subframe collection wanting feedback target community according to the CSI subframe collection indication information of community Y.Adopting this method, then can be only to the current community Y being configured with two CSI subframe collection, just needs the CSI subframe collection indication information of community Y thus can distinguish the A-CSI of two CSI subframe collection.
The implication of each bit in the one-period of the bit mapping A of instruction CSI subframe collection indication information can be different.To above-mentioned the first determine the method for the CSI subframe collection of community Y, to the community of a transmission PUSCH, descending sub frame in one-period or can not dispatch the sub-frame of uplink of PUSCH, although still take a bit at bit mapping A, ignores the bit of its correspondence; To the sub-frame of uplink can dispatching PUSCH in one-period, it indicates it to trigger the CSI subframe collection information of A-CSI at the bit that bit mapping A is corresponding.To the above-mentioned method determining the CSI subframe collection of community Y of the second, to the community of a transmission PUSCH, to the sub-frame of uplink can dispatching PUSCH in one-period, it indicates it to trigger the CSI subframe collection information of A-CSI at the bit that bit mapping A is corresponding; To other bits, although the A-CSI feedback of the community to this transmission PUSCH, these bits can be ignored, but when transmitting A-CSI feedback on other communities, because in descending sub frame possibility other cell uplink subframes corresponding of this community, so feed back the A-CSI of other communities, these bits still can carry the indication information of effective CSI subframe collection.
Determine the method for the length of the bit mapping A indicating CSI subframe collection indication information for two kinds above correspondence, preferably, bit mapping A can be the CSI subframe collection information of the triggering A-CSI at least comprising two radio frames.Like this, the sub-frame of uplink that can configure the same index of different radio frame transmits the A-CSI of different CSI subframe collection respectively, thus can ensure the link performance of the A-CSI reporting each CSI subframe collection.To only have the disturbance regime of subframe 2 to be best in descending reference configuration 5, radio frames, the cycle being mapped A by configuration bit is at least two radio frames, can transmit the A-CSI of different CSI subframe collection in two radio frames respectively by subframe 2.
Embodiment three
In LTE system, to TM1 ~ 9, the subframe of carrying the UL Grant of CSI request is exactly the subframe at CSI reference resources place, and UE measures CSI according to CSI reference resources and reports.
To TDD-FDD CA system, to passing through the situation of FDD community across carrier dispatching TDD cell, when dispatching TDD and being turned down the PUSCH in district, the subframe of the UL Grant that FDD community sends can be a sub-frame of uplink in corresponding TDD cell.As shown in Figure 6, suppose to be adopted FDD scheduling timing to TDD by the PUSCH turned down in district, namely the UL Grant in subframe n is the PUSCH in scheduling subframe n+4, according to the method for the determination CSI reference resources of LTE system, there is not the effective CSI reference resources of TDD cell, thus limit the operation triggering A-CSI.
In addition, as the PUSCH of scheduling FDD community, the UL Grant place descending sub frame of FDD community can correspondence be a sub-frame of uplink in TDD cell.As shown in Figure 7, no matter be configured with across carrier dispatching or self scheduling to TDD cell, according to the method for the determination CSI reference resources of existing LTE system, effective CSI reference resources is there is not concerning TDD cell yet, thus the UL Grant limited in this subframe can not be used for the A-CSI report triggering TDD cell, the A-CSI report of FDD community and TDD cell can not be triggered simultaneously, namely also result in the restriction that the A-CSI of FDD community is fed back.
In order to solve problem as shown in Figure 6 and Figure 7, note PUSCH place sub-frame of uplink is subframe n, note CSI reference resources place subframe n-n
cQI_ref, the present invention proposes TDD cell, then n
cQI_refmeet n
cQI_refbe more than or equal to 4 and subframe n-n
cQI_refit is the minimum value of an effective descending sub frame; When being configured with two CSI subframe collection to TDD cell, to an A-CSI feedback, first determine the A-CSI that will feed back that CSI subframe collection, n
cQI_refmeet n
cQI_refbe more than or equal to 4 and subframe n-n
cQI_refit is the minimum value of an effective descending sub frame of this CSI subframe collection that will feed back corresponding.Here, the method for embodiment one and embodiment two can be adopted to determine to feed back the A-CSI of that CSI subframe collection; Or also can adopt additive method, the present invention does not limit.
Adopt this method, to the situation of PUSCH of scheduling FDD community, the sub-frame of uplink that 10 descending sub frames of FDD community may be used to the A-CSI Bing FDD community of triggering TDD cell feeds back; To the situation of the PUSCH across carrier dispatching TDD cell, all A-CSI that can may be used to triggering TDD cell across the descending sub frame of the PUSCH of carrier dispatching TDD cell on FDD community.Thus add the dispatching flexibility triggering A-CSI report in TDD-FDDCA system.
Corresponding to said method, present invention also provides a kind of terminal equipment, may be used for the method implementing above-mentioned the application.Fig. 8 is the basic structure schematic diagram of this equipment.This equipment comprises: UL Grant detection module, CSI measurement module and up sending module.
UL Grant detection module, for the UL Grant that base stations detected sends, when receiving UL Grant, detecting its CSI request territory further and whether indicating triggering A-CSI report.
CSI measurement module, for when triggering A-CSI feedback, the sub-frame of uplink according to UL Grant place descending sub frame and its scheduling PUSCH determines the current CSI subframe collection triggering A-CSI, determines CSI reference resources, and completes the measurement of CSI.
Up sending module, for transmitting the A-CSI of each community of current triggering on PUSCH.
Adopt method of the present invention, can determine to trigger the CSI subframe collection of A-CSI, determine CSI reference resources, and be supported on all descending sub frames can dispatching PUSCH and trigger CSI aperiodic, improve the flexibility of Resourse Distribute.
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 (25)
1. transmit a method of CSI aperiodic, it is characterized in that, the method comprises:
UE receives the configuration information of A-CSI, when a cell configuration during two CSI subframe collection, comprises the information of the configuration information of CSI subframe collection and the CSI subframe collection of an instruction A-CSI report;
UE receives UL Grant, and to the community of each triggering A-CSI, UE determines its CSI reference resources respectively, and determines according to CSI reference resources the resource measuring channel and interference, thus calculates the CSI information of this community;
UE transmits the A-CSI of each community of current triggering on PUSCH.
2. method according to claim 1, it is characterized in that, to CSI subframe collection configuration cycle T ms, to the bit mapping B of the T bit of a cell configuration instruction CSI subframe collection indication information, the UL Grant detected in each subframe of instruction one-period triggers the information of the CSI subframe collection of A-CSI.
3. method according to claim 1, is characterized in that, to a current community being configured with two CSI subframe collection, obtains CSI subframe collection indication information according to the CSI subframe collection of these two configurations is implicit.
4. method according to claim 1, it is characterized in that, to CSI subframe collection configuration cycle T ms, to the bit mapping B of a cell configuration instruction CSI subframe collection indication information, its length determines according to the sum of the descending sub frame of the schedulable PUSCH in one-period T, and the UL Grant detected in each subframe of instruction one-period triggers the information of the CSI subframe collection of A-CSI.
5. method according to claim 4, is characterized in that, to TDD cell, the up reference configuration of various TDD is arranged to the length of identical bit mapping B.Remembering that a up reference configuration of TDD descending sub frame number of schedulable PUSCH in cycle T is L, then can be the CSI subframe collection that front L the bit of bit mapping B is used to indicate the triggering A-CSI of the descending sub frame of each schedulable PUSCH successively.
6. the method according to claim 2,3 or 4, it is characterized in that, to the PUSCH sent on the X of community, according to the descending sub frame index sending UL Grant, CSI subframe collection indication information according to transmission community X determines the CSI subframe collection that will feed back A-CSI, thus the A-CSI of this CSI subframe collection of feedback community Y.
7. method according to claim 6, is characterized in that, when community X does not configure two CSI subframe collection, still needs the CSI subframe collection indication information of community X and can distinguish two CSI subframe collection.
8. method according to claim 6, is characterized in that, when community X do not configure two CSI subframe collection and current to feed back the A-CSI of community X time, the CSI subframe collection indication information of community X can be ignored;
Or, during the A-CSI of the CSI subframe collection indication information of a Zhi community X instruction triggering CSI subframe collection, the just A-CSI of feedback community X.
9. method according to claim 6, is characterized in that, to the descending sub frame that can trigger PUSCH in one-period, it indicates it to trigger the CSI subframe collection information of A-CSI at the bit that CSI subframe collection indication information is corresponding; And ignore other bits.
10. the method according to claim 2,3 or 4, it is characterized in that, to the PUSCH sent on the X of community, according to the descending sub frame index sending UL Grant, the A-CSI of that CSI subframe collection wanting feedback target community is determined according to the CSI subframe collection indication information of community Y, thus the A-CSI of this CSI subframe collection of feedback community Y.
11. methods according to claim 10, is characterized in that, only to the current community Y being configured with two CSI subframe collection, just need the CSI subframe collection indication information of community Y thus can distinguish two CSI subframe collection.
12. methods according to claim 10, it is characterized in that, to the community of a transmission PUSCH, to the descending sub frame that can trigger PUSCH in one-period, it indicates it to trigger the CSI subframe collection information of A-CSI at the bit that instruction CSI subframe collection indication information is corresponding; To other bits, still carry the indication information of effective CSI subframe collection.
13. methods according to claim 1, it is characterized in that, to CSI subframe collection configuration cycle T ms, to the bit mapping A of the T bit of a cell configuration instruction CSI subframe collection indication information, the CSI subframe collection of each sub-frame of uplink transmission A-CSI of instruction one-period.
14. methods according to claim 1, it is characterized in that, to CSI subframe collection configuration cycle T ms, to the bit mapping A of a cell configuration instruction CSI subframe collection indication information, its length determines according to the sum of the sub-frame of uplink in one-period T, the CSI subframe collection of the sub-frame of uplink transmission A-CSI in instruction one-period T.
15. methods according to claim 14, is characterized in that, to TDD cell, the up reference configuration of various TDD are arranged to the length of identical bit mapping A.Remembering that a up reference configuration of TDD sub-frame of uplink number in cycle T is L, then can be that front L the bit of bit mapping A is used to indicate the CSI subframe collection that each sub-frame of uplink transmits A-CSI successively.
16. methods according to claim 13 or 14, it is characterized in that, to the PUSCH sent on the X of community, according to the sub-frame of uplink index sending PUSCH, CSI subframe collection indication information according to transmission community X determines the CSI subframe collection that will feed back A-CSI, thus the A-CSI of this CSI subframe collection of feedback community Y.
17. methods according to claim 16, is characterized in that, when community X does not configure two CSI subframe collection, still need the CSI subframe collection indication information of community X and can distinguish two CSI subframe collection.
18. methods according to claim 16, is characterized in that, when community X do not configure two CSI subframe collection and current to feed back the A-CSI of community X time, the CSI subframe collection indication information of community X can be ignored;
Or, during the A-CSI of the CSI subframe collection indication information of a Zhi community X instruction transmission CSI subframe collection, the just A-CSI of feedback community X.
19. methods according to claim 16, is characterized in that, to the sub-frame of uplink in one-period, it indicates the CSI subframe collection information of its transmission A-CSI at the bit that CSI subframe collection indication information is corresponding; And ignore other bits.
20. methods according to claim 12 or 13, it is characterized in that, to the PUSCH sent on the X of community, according to the sub-frame of uplink index sending PUSCH, the A-CSI of that CSI subframe collection that will transmit community Y is determined according to the CSI subframe collection indication information of community Y, thus the A-CSI of this CSI subframe collection of feedback community Y.
21. methods according to claim 19, is characterized in that, only to the current community Y being configured with two CSI subframe collection, just need the CSI subframe collection indication information of community Y and can distinguish two CSI subframe collection.
22. methods according to claim 19, it is characterized in that, to the community of a transmission PUSCH, to the sub-frame of uplink index that can send PUSCH in one-period, it indicates the CSI subframe collection information of its transmission A-CSI at the bit that CSI subframe collection indication information is corresponding; To other bits, still carry the indication information of effective CSI subframe collection.
23. methods according to claim 1, is characterized in that, to the TDD cell in TDD-FDD CA, to TM1 ~ 9, note PUSCH place sub-frame of uplink is subframe n, CSI reference resources place subframe n-n
cQI_ref, then n
cQI_refmeet n
cQI_refbe more than or equal to 4 and subframe n-n
cQI_refit is the minimum value of an effective descending sub frame.
24. methods according to claim 1, it is characterized in that, to the TDD cell in TDD-FDD CA, to TM1 ~ 9, when being configured with two CSI subframe collection to TDD cell, according to the CSI subframe collection information will feeding back A-CSI, note PUSCH place sub-frame of uplink is subframe n, CSI reference resources place subframe n-n
cQI_ref, n
cQI_refmeet n
cQI_refbe more than or equal to 4 and subframe n-n
cQI_refit is the minimum value of an effective descending sub frame of this CSI subframe collection that will feed back corresponding.
25. 1 kinds of terminal equipments processing CSI aperiodic, is characterized in that, comprising: UL Grant detection module, CSI measurement module and up sending module, wherein,
UL Grant detection module, for the UL Grant that base stations detected sends, when receiving UL Grant, detecting its CSI request territory further and whether indicating triggering A-CSI report.
CSI measurement module, for when triggering A-CSI feedback, the sub-frame of uplink according to UL Grant place descending sub frame and its scheduling PUSCH determines the current CSI subframe collection triggering A-CSI, determines CSI reference resources, and completes the measurement of CSI.
Up sending module, for transmitting the A-CSI of each community of current triggering on PUSCH.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017049613A1 (en) * | 2015-09-25 | 2017-03-30 | 华为技术有限公司 | Method, device and system for transmitting or receiving uplink control information |
| CN106559884A (en) * | 2015-09-25 | 2017-04-05 | 电信科学技术研究院 | A kind of transmission method and equipment of CSI aperiodic |
| WO2018228361A1 (en) * | 2017-06-16 | 2018-12-20 | Qualcomm Incorporated | Signaling design for multiple aperiodic csi feedback |
| CN109417811A (en) * | 2016-06-30 | 2019-03-01 | Lg 电子株式会社 | The device of the method for reporting channel status information and support this method in the wireless communication system for supporting unauthorized band |
| CN111316590A (en) * | 2017-11-10 | 2020-06-19 | 高通股份有限公司 | Techniques for signaling channel state information requests and communication link events |
| CN112673588A (en) * | 2018-10-01 | 2021-04-16 | 高通股份有限公司 | UE indication of number of supported trigger states |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017049613A1 (en) * | 2015-09-25 | 2017-03-30 | 华为技术有限公司 | Method, device and system for transmitting or receiving uplink control information |
| CN106559884A (en) * | 2015-09-25 | 2017-04-05 | 电信科学技术研究院 | A kind of transmission method and equipment of CSI aperiodic |
| CN107113798A (en) * | 2015-09-25 | 2017-08-29 | 华为技术有限公司 | Ascending control information is sent or method of reseptance, apparatus and system |
| CN107113798B (en) * | 2015-09-25 | 2019-12-24 | 华为技术有限公司 | Method, device and system for sending or receiving uplink control information |
| CN106559884B (en) * | 2015-09-25 | 2020-01-14 | 电信科学技术研究院 | Method and device for transmitting aperiodic CSI |
| CN109417811A (en) * | 2016-06-30 | 2019-03-01 | Lg 电子株式会社 | The device of the method for reporting channel status information and support this method in the wireless communication system for supporting unauthorized band |
| US11206068B2 (en) | 2016-06-30 | 2021-12-21 | Lg Electronics Inc. | Method for reporting channel state information in wireless communication system supporting unlicensed band, and apparatus for supporting same |
| CN109417811B (en) * | 2016-06-30 | 2023-02-17 | Lg 电子株式会社 | Method and apparatus for reporting channel state information in wireless communication system |
| WO2018228361A1 (en) * | 2017-06-16 | 2018-12-20 | Qualcomm Incorporated | Signaling design for multiple aperiodic csi feedback |
| CN110754109A (en) * | 2017-06-16 | 2020-02-04 | 高通股份有限公司 | Signaling design for multiple aperiodic CSI feedback |
| CN111316590A (en) * | 2017-11-10 | 2020-06-19 | 高通股份有限公司 | Techniques for signaling channel state information requests and communication link events |
| CN112673588A (en) * | 2018-10-01 | 2021-04-16 | 高通股份有限公司 | UE indication of number of supported trigger states |
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