CN104113397B - The method and apparatus of aperiodic CSI feedback in flexible TDD reconfiguration system - Google Patents
The method and apparatus of aperiodic CSI feedback in flexible TDD reconfiguration system Download PDFInfo
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Abstract
Propose a kind of method of aperiodic CSI feedback in the flexible reconfiguring cell TDD, comprising: step A:UE receives the signaling information that eNB is sent, and obtains CHAnd CLCorresponding subframe position；Wherein, CHAnd CLCorresponding different sub-frame set；Step B: the UE detects the uplink DCI information for carrying aperiodic CSI request in CSI request subframe；Step C: the UE is directed to the aperiodic CSI of corresponding CSI sub-frame set on corresponding sub-frame of uplink to eNB feedback.On the other hand the embodiment of the present invention proposes a kind of terminal.Disclosed above scheme according to the present invention, defines CSI sub-frame set by way of implicitly or explicitly, and terminal obtains during aperiodic CSI feedback after the instruction information of CSI sub-frame set, can be realized in the flexible reconfiguring cell TDD for CHAnd CLAperiodic CSI feedback, improve system performance.
Description
Technical field
The present invention relates to the CSI(Channel State Information in communication system, channel state informations) feedback
Technology, the in particular to feedback technique of aperiodic CSI in flexible TDD reconfiguration system.
Background technique
The Long Term Evolution (LTE) System of 3GPP standardization body supports frequency division duplex (FDD) and two kinds of time division duplex (TDD)
Duplex mode.In LTE TDD, the length of each radio frames is 10ms, it is divided into the field that two length are 5ms, specifically
LTE tdd frame structure as shown in Figure 1.And time slot and 3 special domains that each field is 0.5ms comprising 8 length, this 3
Special domain includes descending pilot frequency time slot (DwPTS), protection interval (GP) and uplink pilot time slot (UpPTS), this 3 special domains
The sum of length is 1ms.In addition, each subframe of LTE tdd frame structure shown in FIG. 1 is made of two continuous time slots, i.e. kth
A subframe includes time slot 2k and time slot 2k+1.
LTE TDD supports 7 kinds of upstream and downstream configurations, as shown in table 1, wherein the D in table 1 represents downlink subframe, and U is represented
Sub-frame of uplink, S represent the special subframe comprising above-mentioned 3 special domains.
In the regulation of current LTE protocol, the TDD uplink-downlink configuration of cell be it is semi-static, eNB will not frequently change small
TDD uplink-downlink configuration in area, at least in a data transmission procedure, the TDD uplink-downlink configuration in cell will not change
Become.
Table 1
In existing LTE/LTE-A system, UE can according to the configuration of eNB, period or aperiodic feedback CSI information, with
Just eNB obtains the down channel situation of UE.It is by being included in uplink DCI(Downlink for aperiodic CSI feedback
Control Information) CSI request (CSI Request) bit triggering in format.It is fixed in 3GPP standard Rel.11
In the lte-a system of justice, 10 kinds of TM(Transmission Mode, transmission mode are defined), for transmission mode TM1~9,
There is no the concepts of CSI process (CSI Process), or think that CSI process number is 1, for transmission mode TM10, eNB energy
Multiple CSI processes are enough configured to UE by high-level signaling, and each CSI process can at most divide two CSI subframe collection
(CSI Subframe Set).In one or more CSI process of primary aperiodic CSI feedback triggering, when to a CSI
When process is configured with 2 CSI subframe collection, primary aperiodic CSI feedback is triggering to one of CSI subframe collection CCSI,i(i=0
Or 1) CSI feedback.Specifically, UE is in CCSI,iIn CSI reference resources (CSI is determined in some downlink subframe
Reference Resource), and further progress CSI is measured；Wherein CCSI,iBy the CSI for triggering above-mentioned aperiodic CSI feedback
Downlink subframe decision where request, i.e. CCSI,iFor the CSI subframe collection of subframe where the uplink DCI comprising CSI request.As it can be seen that
In 3GPP standard Rel.11, the corresponding subframe collection of aperiodic CSI feedback, is by the uplink DCI institute comprising aperiodic CSI request
Downlink subframe implicit indication.
In order to meet the growing business demand of mobile subscriber, in LTE-A, flexible TDD reconfiguration technology is obtained
More and more concerns.Flexible TDD reconfiguration technology can be such that the ratio of current sub-frame of uplink and downlink subframe more meets to work as
The ratio of preceding upstream traffic and downlink traffic is conducive to improve the uplink and downlink peak rate of user and improves handling up for system
Amount.
For the system that flexible TDD is reconfigured, the TDD UL/DL uplink-downlink configuration of cell is with upper in current area
Downlink traffic and dynamic change, this mean that some subframe can dynamic change up-downlink direction, this part subframe
As flexible sub-frame.In addition, flexibly the wireless environment where the reconfiguring cell TDD will receive the shadow of adjacent frequency around or co-frequency cell
Ring, and these adjacent cells generally also work in tdd mode, so as to cause the flexible reconfiguring cell TDD inner part downlink subframe by
Interference to dominant interference adjacent cell is stronger, such as when dominant interference adjacent cell is also downlink subframe in these subframe positions；And
Other a part of downlink subframes (usually flexible sub-frame) are then weaker by the interference of dominant interference adjacent cell, such as when dominant interference is small
Area is when being sub-frame of uplink in these subframe positions.In this way in the flexible reconfiguring cell TDD, the downlink subframe of each radio frames
(including flexible sub-frame) can be divided into two set CHAnd CL, wherein the two set can only include an element.
For purposes of illustration only, being combined into C with the downlink subframe collection interfered by stronger dominant interference adjacent cellHWith by weaker trunk
The downlink subframe collection for disturbing adjacent cell interference is combined into CLIt is illustrated.For example, in order to give full play to flexible TDD reconfiguration technology
A little, it is necessary to feed back the CSI of above-mentioned two set respectively.
But in flexible TDD reconfiguration system, in order to reduce the complexity of uplink scheduling timing, system will not pass through sometimes
Belong to CLSubframe send uplink DCI format because these subframes are usually flexible sub-frame, if these subframes send uplink
DCI needs to readjust uplink scheduling timing after above-mentioned flexible sub-frame is transformed into sub-frame of uplink；And it is allowed through category
In CLSubframe send uplink DCI, sub-frame of uplink corresponding with these subframes can be transformed to downlink subframe, such as group sometimes
Frame #4 and subframe #9 belong to CLAnd at this moment subframe #8 and subframe #3 are directed to C when flexibly changing as downlink subframeLAperiodic CSI will
It is unable to get feedback.This means that if still continuing to use the method that 3GPP standard Rel.11 is defined, i.e., by by including non-week
The corresponding subframe collection of the aperiodic CSI of downlink subframe implicit indication where the uplink DCI of phase CSI request, will lead to for CL's
CSI feedback can not be triggered.
From above-mentioned analysis as it can be seen that in the flexible reconfiguring cell TDD, if to realize for CHAnd CLAperiodic CSI it is anti-
It presents, method defined in 3GPPP standard Rel.11 can not be triggered the aperiodic CSI feedback for being directed to flexible downlink subframe is faced
The problem of, and this problem is at present still without corresponding solution.
Summary of the invention
The present invention provides flexible TDD reconfigure in aperiodic CSI feedback method, can effectively realize for flexible
C in the reconfiguring cell TDDHAnd CLAperiodic CSI fed back.
To achieve the above object, on the one hand the embodiment of the present invention proposes aperiodic in a kind of flexible reconfiguring cell TDD
The method of CSI feedback, comprising:
Step A:UE receives the signaling information that eNB is sent, and obtains CHAnd CLCorresponding subframe position；Wherein, CHAnd CLIt is corresponding
Different sub-frame sets；
Step B: the UE detects the uplink DCI information for carrying aperiodic CSI request in CSI request subframe；
Step C: the UE is directed to the non-week of corresponding CSI sub-frame set on corresponding sub-frame of uplink to eNB feedback
Phase CSI.
On the other hand the embodiment of the present invention proposes a kind of terminal, including receiving module, detection judgment module and transmission
Module,
The receiving module obtains C for receiving the signaling information of eNB transmissionHAnd CLCorresponding subframe position；Wherein,
CHAnd CLCorresponding different sub-frame set；
The detection judgment module is believed for the uplink DCI that detection carries aperiodic CSI request in CSI request subframe
Breath；
The sending module, for being directed to corresponding CSI sub-frame set to eNB feedback on corresponding sub-frame of uplink
Aperiodic CSI.
Disclosed above scheme according to the present invention defines CSI sub-frame set mark, terminal by implicit or explicit mode
It obtains during aperiodic CSI feedback after the instruction information of CSI sub-frame set, can be realized in the flexible reconfiguring cell TDD
For CHAnd CLAperiodic CSI feedback triggering, improve system performance.Further it is proposed that above scheme, to existing
Equipment or system change very little, will not influence the compatibility of equipment, and its realize it is not only simple but also efficiently.
Detailed description of the invention
Fig. 1 is the frame structure schematic diagram of LTE TDD；
Fig. 2 is the method flow diagram of aperiodic CSI feedback in the flexible reconfiguring cell TDD of the embodiment of the present invention；
Fig. 3 is that application scenarios one of the present invention realize flow chart of steps；
Fig. 4 is that application scenarios two of the present invention realize flow chart of steps；
Fig. 5 is that application scenarios three of the present invention realize flow chart of steps；
Fig. 6 is that application scenarios four of the present invention realize flow chart of steps；
Fig. 7 is the structural schematic diagram of the terminal of that embodiment of the invention equipment.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of embodiment is shown in the accompanying drawings, wherein identical from beginning to end
Or similar label indicates same or similar element or the element with same or like operation.It is retouched below with reference to attached drawing
The embodiment stated is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to existing characteristics, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition one
Or other multiple features, integer, step, operation, element, component and/or their group.It should be understood that when we claim element quilt
" connection " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be centres
Element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.Wording used herein " and/
Or " it include one or more associated any cells for listing item and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
Those skilled in the art of the present technique are appreciated that " terminal " used herein above, " terminal device " both include only having
The equipment of the wireless signal receiver of non-emissive ability, and include having that two-way communication can be carried out on bidirectional communication link
The equipment for receiving and emitting hardware.This equipment may include: with and without the honeycomb of multi-line display or other communications
Equipment；It can be with combine voice and the PCS Personal Communications System of data processing, fax and/or communication ability (PCS)；May include
Radio frequency receiver and pager, the Internet/intranet access, web browser, notepad, calendar and/or global positioning system
(GPS) PDA(Personal Digital Assistant) of receiver；And/or conventional laptop and/or palm type calculation including radio frequency receiver
Machine or other equipment.
In mobile communication system, for example, in the flexible reconfiguring cell TDD, because of CHAnd CLBy from adjacent cell
There are larger differences for interference, so need to feed back aperiodic CSI respectively for above-mentioned two set, and what aperiodic CSI was directed to
The indicating means of CSI subframe collection re-starts design the characteristics of needs according to flexible TDD reconfiguration system.
For purposes of illustration only, the hereafter downlink subframe set C to be interfered by stronger dominant interference adjacent cellHWith by weaker master
Interfere the downlink subframe set C of adjacent cell interferenceLFor be illustrated.It should be appreciated that CHAnd CLIt is not limited to division mentioned above
Principle can according to need and is suitably grouped.Such as: CHFor flexible sub-frame set, CLFor fixed downlink subframe set；
Alternatively, CHFor strongly disturbing downlink or flexible sub-frame set, CLFor the downlink subframe set of weak jamming or fixation.
Specifically, the basic idea of the invention is that, pass through definition CHAnd CLUnder where the DCI comprising aperiodic CSI request
The corresponding relationship of sub-frame of uplink where the PUSCH of row subframe or the aperiodic CSI of carrying, or it is aobvious by the bit in physical layer signaling
Formula instruction, realizes and is directed to CHAnd CLAperiodic CSI feedback triggering.
It is non-week in the flexible reconfiguring cell TDD of the embodiment of the present invention as described in Figure 2 to realize the purpose of the present invention
The method flow diagram of phase CSI feedback, including step A to step C:
Step A:UE receives the signaling information that eNB is sent, and obtains CHAnd CLCorresponding subframe position；Wherein, CHAnd CLIt is corresponding
Different sub-frame sets；
Step B:UE detects the uplink DCI information for carrying aperiodic CSI request in CSI request subframe；
Step C:UE is directed to the aperiodic CSI of corresponding CSI sub-frame set on corresponding sub-frame of uplink to eNB feedback.
Expansion explanation is carried out to the technical solution of present disclosure one by one below.
Step A:UE receives the signaling information that eNB is sent, and obtains CHAnd CLCorresponding subframe position；Wherein, CHAnd CLIt is corresponding
Different sub-frame sets.
Step B:UE detects the uplink DCI information for carrying aperiodic CSI request in CSI request subframe.
Wherein, CHFor flexible sub-frame set, CLFor fixed downlink subframe set；Alternatively,
CHFor strongly disturbing downlink or flexible sub-frame set, CLFor the downlink subframe set of weak jamming or fixation.
Specifically, can also include: as the embodiment of the present invention
If UE is belonging to set DHCSI request subframe detect aperiodic CSI request, then UE is in corresponding uplink
Frame feedback is directed to CHAperiodic CSI；If UE is belonging to set DLCSI request subframe detect aperiodic CSI request, then
UE is directed to C in corresponding sub-frame of uplink feedbackLAperiodic CSI;
Alternatively, if UE is belonging to set U according to aperiodic CSI requestHCSI feedback subframe feed back aperiodic CSI,
Then the aperiodic CSI is directed to CH；If UE is belonging to set U according to aperiodic CSI requestLCSI feedback subframe feed back non-week
Phase CSI, then the aperiodic CSI is directed to CL。
Wherein, DHAnd DLCorresponding different downlink subframe set, UHAnd ULCorresponding different sub-frame of uplink set.
Wherein, sub-frame set belonging to CSI request subframe or CSI feedback subframe by UE receive eNB send it is explicit or hidden
Formula signaling obtains；Alternatively,
The criteria for classifying that sub-frame set belonging to CSI request subframe or CSI feedback subframe is arranged by UE according to communication standard
It obtains.
That is, DH、DLAnd UH、ULIt is obtained by explicit or implicit signaling, or is obtained according to the agreement of standard.
Wherein, explicit signaling includes: the bit indication information for the high-level signaling that eNB is sent；Alternatively,
Implicit signaling, comprising:
The PDCCH or EPDCCH for the uplink DCI format that UE is detected are in the specific search space PDCCH or EPDCCH UE
Index, wherein the PDCCH or EPDCCH of uplink DCI format include aperiodic CSI request.The specific PDCCH/EPDCCH of UE
Search space has clear meaning in LTE protocol.
In introduction later, expansion is carried out with application scenarios a pair of above-described embodiment and is described further.
Specifically, step B may further comprise: as the embodiment of the present invention
UE obtains aperiodic CSI request bit from uplink DCI, needs to feed back according to the determination of aperiodic CSI request bit
CSI sub-frame set.
Specifically, determining the CSI sub-frame set for needing to feed back according to aperiodic CSI request bit, comprising:
UE determines each sub-frame set C for needing the aperiodic CSI fed back to be directed to according to aperiodic CSI request bitHWith/
Or CL。
Wherein, further includes:
If UE is configured with multiple CSI processes, for example, configurating downlink transmission mode TM10 and supporting multiple CSI processes, UE
One or more CSI processes for needing to feed back are determined according to aperiodic CSI request bit.
Wherein, UE determines each sub-frame set C for needing the CSI process fed back to be directed to according to aperiodic CSI request bitH
And/or CL。
In introduction later, expansion is carried out to above-described embodiment with application scenarios two and is described further.
Specifically, as the embodiment of the present invention, before step B, further includes:
UE obtains the downlink subframe collection for needing the aperiodic CSI fed back to be directed to by receiving the physical layer signaling that eNB is sent
It closes.
Wherein, UE is by being used to indicate the physical layer signaling of the currently practical TDD uplink-downlink configuration in the flexible reconfiguring cell TDD
In indication field, determine the subframe collection C for needing the aperiodic CSI that feeds back targetedHAnd/or CL。
In introduction later, expansion is carried out to above-described embodiment with application scenarios three and is described further.
Step C:UE is directed to the aperiodic CSI of corresponding CSI sub-frame set on corresponding sub-frame of uplink to eNB feedback.
Specifically, step C further comprises as the embodiment of the present invention:
UE determines before CSI feedback subframe according to predefined minimum interval G, and between CSI feedback subframe
Every greater than G first downlink subframe belonging to subframe collection be the CHOr CL, anti-to the eNB in the CSI feedback subframe
Feedback is directed to the CHOr CLAperiodic CSI.
In introduction later, expansion is carried out to above-described embodiment with application scenarios four and is described further.
The disclosed above method according to the present invention defines CSI sub-frame set mark, terminal by way of implicitly or explicitly
It obtains during aperiodic CSI feedback after the instruction information of CSI sub-frame set, can be realized in the flexible reconfiguring cell TDD
For CHAnd CLAperiodic CSI feedback, improve system performance.Further it is proposed that the above method, to existing
Equipment or system change very little, will not influence the compatibility of equipment, and its realization is not only simple but also efficient.
The section Example of present disclosure is specifically introduced below by four application scenarios.
Application scenarios one:
In this application scene, definition includes downlink subframe (the referred to as CSI where the uplink DCI of aperiodic CSI request
Subframe is requested, similarly hereinafter) and CHAnd CLCorresponding relationship (referred to as mode one), or definition feeds back the sub-frame of uplink (letter of aperiodic CSI
Referred to as CSI feedback subframe, similarly hereinafter) and CHAnd CLCorresponding relationship (referred to as mode two), system using one way in which realize
The instruction of CSI subframe collection, but two ways cannot exist simultaneously.Specifically, for mode one, CSI request subframe is divided into two
A set DHAnd DL, wherein the two set can only include an element, DHAperiodic CSI request in interior downlink subframe
The aperiodic CSI feedback of triggering is directed to CH, and DLThe aperiodic CSI of aperiodic CSI request triggering in interior downlink subframe is anti-
Feedback is directed to CL；For mode two, CSI request subframe is divided into two set UHAnd UL, UHThe non-week of interior sub-frame of uplink feedback
Phase, CSI was directed to CH, and ULThe aperiodic CSI of interior sub-frame of uplink feedback is directed to CL.As shown in figure 3, this method includes following
Step:
Step 301, UE receives eNB signaling and obtains CHAnd CLCorresponding subframe position.
Wherein the signaling is usually cell system message or rrc layer signaling, CHAnd CLCorresponding subframe position passes through ratio
The mode of spy's mapping (Bit Map) indicates.
Step 302, UE obtains the division mode of CSI request subframe or CSI feedback subframe in cell.
Here CSI request sub-frame division mode refers to that by CSI request sub-frame division be two set DHAnd DL, wherein DHOn
CSI request triggering aperiodic CSI feedback be directed to CH, and DLOn aperiodic CSI request triggering aperiodic CSI feedback needle
To CL；And the division mode of CSI feedback subframe refers to that by CSI feedback sub-frame division be two set UHAnd UL, the two set can
Only to include an element, wherein UHThe aperiodic CSI of upper feedback is directed to CH, and ULOn feedback aperiodic CSI be directed to CL。
A kind of implementation according to the invention, the division of CSI request/feedback subframe can by signaling explicit instruction,
UE needs to receive cell signaling to obtain CSI request/feedback subframe division information at this time.For example, high-level signaling can pass through
The division of CSI request/feedback subframe is indicated by the bit sequence that 20 bits form, wherein the first of bit sequence bit is corresponding
Meet first subframe in the radio frames of mod2=0 radio frame number SFN, other sons in radio frames SFN and radio frames SFN+1
Other bits of frame and bit sequence are corresponding in turn to, wherein showing that corresponding subframe belongs to D if bit value is 1H, DL, UH
Or UL。
Another mode according to the invention, the division of CSI request/feedback subframe are directly defined by standard.
For example, for mode one, if the TDD uplink-downlink configuration that the SIB1 of cell is broadcasted is configuration #1, and subframe #4
It is configured to MBSFN sub-frame with subframe #9, then CSI request subframe includes subframe { #0, #1, #4, #5, #6, #9 }, then can be by DHIt is fixed
Justice is subframe { #0, #5, #6 }, and by DLIt is defined as subframe { #1, #4, #9 }；For mode two, if cell is by subframe #2 and son
Frame #7 is set as fixed sub-frame of uplink, i.e. subframe #2 and subframe #7 it is constant in the flexible TDD reconfiguration system course of work be upper
Row, then can be by UHIt is defined as subframe { #2 }, and by ULIt is defined as subframe { #7 }.
For mode one, another of the invention is achieved in that, indicates drawing for CSI request subframe by implicit signaling
Point, CSI is indicated by carrying index of the uplink DCI of aperiodic CSI request in the specific search space PDCCH or EPDCCH UE
Request the division of subframe.Specifically, such as in the specific search space PDCCH or EPDCCH UE there may be 6 PDCCH or
EPDCCH, manipulative indexing value Idx, wherein { 0,1 ... 5 } Idx ∈, then if the corresponding Idx mould of the uplink DCI comprising CSI request
N be equal to 0(wherein N reaction be CHAnd CLThe ratio of interior subframe can enable it be equal to 3), then the CSI request subframe belongs to DL, instead
It, which belongs to DH。
Step 303, UE detects the uplink DCI for carrying aperiodic CSI request in CSI request subframe.
Step 304, UE feeds back the aperiodic CSI for corresponding CSI sub-frame set on corresponding sub-frame of uplink n.
Specifically, for mode one, if the uplink DCI comprising aperiodic CSI request that UE is detected in step 303
Place subframe belongs to DH, or for mode two, sub-frame of uplink n belongs to UH, then UE feedback is directed to CSI subframe collection CHIt is aperiodic
CSI.UE should be in downlink subframe n-nrefInterior determining CSI reference resources, the aperiodic CSI of one step surveying of going forward side by side, wherein if
UE is configured with downlink transfer mode TM1~9 or other downlinks TM and is only configured with a CSI process, then nrefIt is to make CSI
Reference resources, which are located at, contains the effective downlink subframe triggered where the uplink scheduling signaling (UL Grant) of aperiodic CSI；Such as
Fruit UE is configured with 2 or 3 CSI processes, for example, the configurating downlink TM10 and CSI process number configured is equal to 2 or 3, then nrefFor
Meet nrefMore than or equal to 4 and n-nrefBelong to CHMinimum value；If UE is configured with 4 CSI processes, for example, downlink TM10 is simultaneously
And the CSI process number of configuration is equal to 4, then nrefTo meet nrefMore than or equal to 5 and n-nrefBelong to CHMinimum value.
For mode one, if UE is in subframe where the uplink DCI comprising aperiodic CSI request that step 303 detects
Belong to DL, or for mode two, sub-frame of uplink n belongs to UL, then UE feedback is directed to CSI subframe collection CLAperiodic CSI.The CSI of UE
Reference resources are in downlink subframe n-nrefIt is interior, and UE further measures aperiodic CSI, wherein if UE is configured with downlink transfer
Mode TM1~9 or other downlinks TM and it is only configured with a CSI process, then nrefBe make CSI reference resources be located at comprising
Effective downlink subframe where the uplink scheduling signaling (UL Grant) of the aperiodic CSI of triggering；If UE is configured with 2 or 3
CSI process, for example, the configurating downlink TM10 and CSI process number configured is equal to 2 or 3, then nrefTo meet nrefMore than or equal to 4
And n-nrefBelong to CLMinimum value；If UE is configured with 4 CSI processes, for example, configurating downlink TM10 and configure CSI into
Number of passes is equal to 4, then nrefTo meet nrefMore than or equal to 5 and n-nrefBelong to CLMinimum value.
So far, this application scene process terminates.According to the method for this application scene, CSI request subframe or CSI can be passed through
The instruction of subframe is fed back, realizes and is directed to CHOr CLAperiodic CSI feedback triggering.It should be appreciated that above-mentioned steps 302 are one
Kind implementation need to only guarantee before step S304 is executed, execute step 302, i.e., acquisition needs the son fed back in advance
Frame aggregate information, and and non-limiting step 302 must be executed between step 301 and step 303.
Application scenarios two:
In this application scene, UE is fed back according to the instruction of CSI request bit for the aperiodic of corresponding CSI sub-frame set
CSI.As shown in Figure 4, comprising the following steps:
Step 401, UE receives eNB signaling and obtains CHAnd CLCorresponding subframe position.
Wherein the signaling is usually cell system message or rrc layer signaling, CHAnd CLCorresponding subframe position passes through ratio
The mode of spy's mapping (Bit Map) indicates.
Step 402, UE detects the uplink DCI for carrying aperiodic CSI request in CSI request subframe.
Step 403, UE feeds back the aperiodic CSI for corresponding CSI sub-frame set on corresponding sub-frame of uplink n.
The aperiodic CSI request ratio detected in the aperiodic CSI of feedback targeted CSI sub-frame set and step 402
Special state is related.Here, clothes where the PUSCH that note is dispatched comprising the uplink authorization signaling (UL Grant) of CSI request bit
Business cell is serving cell c.
A kind of implementation according to the invention, it is assumed that UE is only configured with a serving cell, to downlink transfer mode TM1
~9 or other downlinks TM and it is only configured with a CSI process, for example, only configuring the TM10 of a CSI process, divided
Two CSI subframe collection.Assuming that the digit of above-mentioned CSI request bit is 2, then can each code word to the two bits it is again fixed
Justice, to further indicate the aperiodic CSI that trigger which CSI subframe collection while instruction triggers aperiodic CSI
Or the CSI of two CSI subframe collection is triggered simultaneously.For example, a kind of possible indicating mode is as shown in table 2.Assuming that above-mentioned CSI is asked
The digit for seeking bit is 1, then can define the instruction of bit value ' 0 ' and not feed back aperiodic CSI, and bit value ' 1 ' can indicate together
When feed back two CSI subframe collection aperiodic CSI；Alternatively, the aperiodic CSI that can define ' 1 ' indication feedback of bit value is directed to
Code word (one of ' 01 ', ' 10 ' or ' 11 ') indication feedback when being 2 bits of subframe collection and CSI request bit it is non-
The subframe collection that period CSI is directed to is identical, for example, identical with the subframe collection that the aperiodic CSI of ' 01 ' indication feedback of code word is directed to.
CSI request bit status corresponding meaning when table 2CSI request number of bits is 2
| CSI request bit value | Corresponding meaning |
| ’00’ | Aperiodic CSI is not fed back |
| ‘01’ | Feedback is directed to CHAperiodic CSI |
| ‘10’ | Feedback is directed to CLAperiodic CSI |
| ‘11’ | Feedback is directed to CHAnd CLAperiodic CSI |
Another implementation according to the invention, it is assumed that UE is worked at the same time to be reconfigured in carrier wave polymerization and flexible TDD
A CSI process, example in downlink TM1~9 or other downlinks TM and are only configured under mode and to each carrier operation
Such as, the TM10 of a CSI process is only configured.Here, each carrier wave can divide most two CSI subframe collection.For example, it may be
Pcell is supported to configure most two CSI subframe collection, but Scell is not supported to distinguish CSI subframe collection.Assuming that CSI request ratio
Special digit is 2, then can redefine to each code word of the two bits, which service cell set indicates will trigger
Aperiodic CSI, and further discriminate between be triggering divided two CSI subframe collection serving cell which CSI subframe collection
Aperiodic CSI, or trigger the aperiodic CSI of two CSI subframe collection of above-mentioned serving cell simultaneously.Here, a service
Set of cells may include one or more serving cell for being allocated to UE.If two CSI subframes are not configured in some carrier wave
Collection, then do not distinguish CSI subframe collection but trigger an aperiodic CSI of this carrier wave.It here, can be still to code word ' 01 '
It is the aperiodic CSI for only triggering serving cell c.For example, table 2-2A and table 2-2B are two kinds of possible indicating modes.Assuming that above-mentioned
The digit of CSI request bit is 1, then can define the instruction of bit value ' 0 ' and not feed back aperiodic CSI, and bit value ' 1 ' can refer to
Show while the aperiodic CSI of all CSI subframe collection of all serving cells；Alternatively, ' 1 ' indication feedback of bit value can be defined
Code word (one of ' 01 ', ' 10 ' or ' 11 ') indication feedback when aperiodic CSI and CSI request bit are 2 bits
Aperiodic CSI is identical, such as.It is identical with the aperiodic CSI of ' 01 ' indication feedback of code word.
The corresponding meaning of table 2-A CSI request bit value
The corresponding meaning of table 2-B CSI request bit value
Another implementation according to the invention, it is assumed that UE is worked at the same time to be reconfigured in carrier wave polymerization and flexible TDD
A CSI process, example in downlink TM1~9 or other downlinks TM and are only configured under mode and to each carrier operation
Such as, the TM10 of a CSI process is only configured.Here, each carrier wave can divide most two CSI subframe collection.It particularly, can be with
It is to support Pcell to configure most two CSI subframe collection, but do not support Scell to distinguish CSI subframe collection.It can be to above-mentioned
The digit of CSI request bit is extended, such as increasing is 3 bits, and aperiodic CSI targeted CSI sub-frame set 3 is compared by this
Special state instruction.To each code word of this 3 bits, the aperiodic CSI that trigger a service cell set is indicated, and
Further discriminate between is to trigger the aperiodic CSI of that CSI subframe collection of a serving cell, or one service of triggering simultaneously is small
The aperiodic CSI of two CSI subframe collection in area.Here, a service cell set may include one or more configuration UE
Serving cell.If two CSI subframe collection are not configured in some carrier wave, CSI subframe collection is not distinguished but triggers this carrier wave
An aperiodic CSI.A kind of possible indicating mode is as shown in table 3.Assuming that the digit of above-mentioned CSI request bit is 1, then may be used
With define bit value ' 0 ' instruction do not feed back aperiodic CSI, and bit value ' 1 ' can indicate simultaneously all serving cells own
The aperiodic CSI of CSI subframe collection；Alternatively, the serving cell that the aperiodic CSI that can define ' 1 ' indication feedback of bit value is directed to
Code word (one of code word in addition to ' 000 ') indication feedback when with subframe collection and CSI request bit being 3 bits it is non-
The serving cell that period CSI is directed to is identical with subframe collection, such as.The clothes being directed to the aperiodic CSI of ' 001 ' indication feedback of code word
Cell of being engaged in is identical with subframe collection.
The flexible TDD of table 3 is reconfigured and the corresponding meaning of CSI request bit value under state of carrier aggregation
Another implementation according to the invention, it is assumed that UE only configures a job under flexible TDD reconfiguration mode
Serving cell and be configured with multiple CSI processes, for example, configurating downlink TM10 and supporting multiple CSI processes.Here, each CSI
Process can be with the most two CSI subframe collection of further division.Assuming that the digit of above-mentioned CSI request bit be 2, then can to this two
Each code word of a bit redefines, to further indicate while the aperiodic CSI of instruction one group of CSI process of triggering
The aperiodic CSI of which CSI subframe collection is triggered out or triggers the CSI of two CSI subframe collection simultaneously.For example, table 4-1 and
Table 4-2 is two kinds of possible indicating modes.In table 4-1 and table 4-2, if two CSI subframes are not configured in a CSI process
Collection, then do not distinguish CSI subframe collection to this CSI process but trigger an aperiodic CSI of this CSI process.Assuming that above-mentioned
The digit of CSI request bit is 1, then can define the instruction of bit value ' 0 ' and not feed back aperiodic CSI, and bit value ' 1 ' can refer to
Show while feeding back the aperiodic CSI of all CSI subframe collection of all CSI processes；Alternatively, bit value ' 1 ' can indicate while anti-
Present the aperiodic CSI of all CSI subframe collection of one group of CSI process；Alternatively, the non-week of ' 1 ' indication feedback of bit value can be defined
When CSI process sets and subframe collection that phase CSI is directed to and CSI request bit are 2 bits a code word (' 01 ', ' 10 ' or
One of ' 11 ') the CSI process sets that the aperiodic CSI of indication feedback is directed to are identical with subframe collection, such as.It is anti-with the instruction of code word ' 01 '
The CSI process sets that the aperiodic CSI of feedback is directed to are identical with subframe collection.
CSI request bit status corresponding meaning when table 4-1CSI request number of bits is 2
CSI request bit status corresponding meaning when table 4-2CSI request number of bits is 2
Another implementation according to the invention, it is assumed that UE only configures a job under flexible TDD reconfiguration mode
Serving cell and be configured with multiple CSI processes, for example, configurating downlink TM10 and supporting multiple CSI processes.Here, each CSI
Process can be with the most two CSI subframe collection of further division.Assuming that increasing the digit of CSI request bit, such as 3 bits, non-week
Phase CSI targeted CSI sub-frame set by 3 bit state instruction.To trigger the aperiodic of one group of CSI process in instruction
The aperiodic CSI that trigger which CSI subframe collection is further indicated while CSI or triggers two CSI subframes simultaneously
The CSI of collection.For example, a kind of possible indicating mode is as shown in table 5.In table 5, if two CSI are not configured in a CSI process
Subframe collection is then an aperiodic CSI for not distinguishing CSI subframe collection to this CSI process but triggering this CSI process.It is false
If the digit of above-mentioned CSI request bit is 1, then it can define bit value ' 0 ' and indicate not feeding back aperiodic CSI, and bit value ' 1 '
It can indicate the aperiodic CSI for all CSI subframe collection for feeding back all CSI processes simultaneously；Alternatively, bit value ' 1 ' can indicate
The aperiodic CSI of all CSI subframe collection of one group of CSI process is fed back simultaneously；Alternatively, ' 1 ' indication feedback of bit value can be defined
The CSI process that is directed to of aperiodic CSI and subframe collection and CSI request bit when being 3 bits a code word (except ' 000 ' with
One of outer code word) CSI process that the aperiodic CSI of indication feedback is directed to is identical with subframe collection, such as.Refer to code word ' 001 '
The CSI process for showing that the aperiodic CSI of feedback is directed to is identical with subframe collection.
The flexible TDD of table 5 is reconfigured and the corresponding meaning of CSI request bit value in the case of more CSI process sets
Another implementation according to the invention, it is assumed that UE can configure multiple serving cells, and wherein at least have
One serving cell worked under flexible TDD reconfiguration mode, and to each serving cell can be configured with multiple CSI into
Journey, for example, configurating downlink TM10 and supporting multiple CSI processes.Here, each CSI process can be most two with further division
CSI subframe collection.Particularly, it can be the CSI process on Pcell to support to configure most two CSI subframe collection, but to Scell
CSI process do not support distinguish CSI subframe collection.Assuming that the digit of above-mentioned CSI request bit is 2, then it can be to the two bits
Each code word redefine, thus in the aperiodic CSI of instruction one group of serving cell of triggering, and to each clothes being triggered
The aperiodic CSI of one group of CSI process can be respectively configured in business cell, and further indicates to the CSI process of each triggering
It triggers the aperiodic CSI of which CSI subframe collection or triggers the CSI of two CSI subframe collection simultaneously.For example, table 6-1 and table
6-2 is two kinds of possible indicating modes.In table 6-1 and table 6-2, if two CSI subframe collection are not configured in a CSI process,
It is then the aperiodic CSI that CSI subframe collection is not distinguished to this CSI process but triggers this CSI process.Assuming that above-mentioned
The digit of CSI request bit is 1, then can define the instruction of bit value ' 0 ' and not feed back aperiodic CSI, and bit value ' 1 ' can refer to
Show while the aperiodic CSI of all CSI subframe collection of all CSI processes of back services cell c；Alternatively, bit value ' 1 ' can be with
Indicate the aperiodic CSI of all CSI subframe collection of one group of CSI process of back services cell c simultaneously；Alternatively, ratio can be defined
One when the CSI process sets and subframe collection and CSI request bit that the aperiodic CSI of ' 1 ' indication feedback of paricular value is directed to are 2 bits
The CSI process sets that the aperiodic CSI of a code word (one of ' 01 ', ' 10 ' or ' 11 ') indication feedback is directed to are identical with subframe collection,
Such as.It is identical with subframe collection with the CSI process sets that the aperiodic CSI of ' 01 ' indication feedback of code word is directed to.
CSI request bit status corresponding meaning when table 6-1CSI request number of bits is 2
CSI request bit status corresponding meaning when table 6-2CSI request number of bits is 2
Another implementation according to the invention, it is assumed that UE can configure multiple serving cells, and wherein at least have
One serving cell worked under flexible TDD reconfiguration mode, and to each serving cell can be configured with multiple CSI into
Journey, for example, configurating downlink TM10 and supporting multiple CSI processes.Here, each CSI process can be most two with further division
CSI subframe collection.For example, it may be supporting Pcell to configure most two subframe collection, but Scell is not supported to distinguish CSI
Frame collection.Assuming that increase the digit of CSI request bit, such as 3 bits, aperiodic CSI targeted CSI sub-frame set 3 is compared by this
Special state instruction.To trigger the aperiodic CSI of one group of serving cell in instruction, and to each serving cell being triggered
The aperiodic CSI of one group of CSI process can be respectively configured, and the CSI process of each triggering is further indicated and to be triggered
The aperiodic CSI of which the CSI subframe collection or CSI for triggering two CSI subframe collection simultaneously.For example, a kind of possible instruction
Mode is as shown in table 7.In table 7, if two CSI subframe collection are not configured in a CSI process, to this CSI process not area
Divide CSI subframe collection but triggers an aperiodic CSI of this CSI process.Assuming that the digit of above-mentioned CSI request bit is 1, then
The instruction of bit value ' 0 ' can be defined and do not feed back aperiodic CSI, and bit value ' 1 ' can indicate while the institute of back services cell c
There is the aperiodic CSI of all CSI subframe collection of CSI process；Alternatively, bit value ' 1 ' can indicate while back services cell c
The aperiodic CSI of all CSI subframe collection of one group of CSI process；Alternatively, the aperiodic of ' 1 ' indication feedback of bit value can be defined
A code word (code in addition to ' 000 ' when the CSI process sets and subframe collection and CSI request bit that CSI is directed to are 3 bits
One of word) CSI process sets that the aperiodic CSI of indication feedback is directed to are identical with subframe collection, such as.It is anti-with the instruction of code word ' 001 '
The CSI process sets that the aperiodic CSI of feedback is directed to are identical with subframe collection.
The flexible TDD of table 7 is reconfigured and the corresponding meaning of CSI request bit value in the case of more CSI process sets
Specifically, if according to the instruction of CSI request bit aperiodic in step 402, UE should be fed back for CSI
Frame collection CHAperiodic CSI, then the CSI reference resources of UE are in downlink subframe n-nrefIt is interior, and UE further measure it is aperiodic
CSI.Wherein, if UE is configured with downlink transfer mode TM1~9 or other downlinks TM and is only configured with a CSI process,
Then nrefIt is to keep CSI reference resources effective where triggering the uplink scheduling signaling (UL Grant) of aperiodic CSI positioned at containing
Downlink subframe；If UE is configured with 2 or 3 CSI processes, for example, configurating downlink TM10 and configure CSI process number be equal to 2
Or 3, then nrefTo meet nrefMore than or equal to 4 and n-nrefBelong to CHMinimum value；If UE is configured with 4 CSI processes, for example,
The configurating downlink TM10 and CSI process number configured is equal to 4, then nrefTo meet nrefMore than or equal to 5 and n-nrefBelong to CHMost
Small value.
If UE should be fed back for CSI subframe collection C according to the instruction of CSI request bit aperiodic in step 402L's
Aperiodic CSI, then the aperiodic CSI of UE feedback should be in downlink subframe n-nrefThe knot measured on interior CSI reference resources
Fruit, wherein if UE is configured with downlink transfer mode TM1~9 or other downlinks TM and is only configured with a CSI process,
Then nrefIt is to keep CSI reference resources effective where triggering the uplink scheduling signaling (UL Grant) of aperiodic CSI positioned at containing
Downlink subframe；If UE is configured with 2 or 3 CSI processes, for example, configurating downlink TM10 and configure CSI process number be equal to 2
Or 3, then nrefTo meet nrefMore than or equal to 4 and n-nrefBelong to CLMinimum value；If UE is configured with 4 CSI processes, for example,
The configurating downlink TM10 and CSI process number configured is equal to 4, then nrefTo meet nrefMore than or equal to 5 and n-nrefBelong to CLMost
Small value.
So far, this application scene process terminates.It as above, can be by redefining the meaning of aperiodic CSI request bit
Or increase the method for additional indication bit, realize the triggering of the aperiodic CSI feedback for different CSI subframe collection.
Application scenarios three:
In the flexible reconfiguring cell TDD, system would generally be by working in the notifying cell physical layer signaling TCI flexible
UE under TDD reconfiguration mode currently employed practical TDD uplink-downlink configuration.In this application scene, by being added in TCI
One CSI subframe set pointer section F, is used to indicate the targeted subframe collection of aperiodic CSI feedback.As shown in figure 5, including following step
It is rapid:
Step 501, UE receives eNB signaling and obtains CHAnd CLCorresponding subframe position.
Wherein the signaling is usually cell system message or rrc layer signaling, CHAnd CLCorresponding subframe position passes through ratio
The mode of spy's mapping (Bit Map) indicates.
Step 502, UE receives TCI, obtains the indication bit F of the targeted subframe collection of aperiodic CSI feedback.
Step 503, UE detects the uplink DCI for carrying aperiodic CSI request in CSI request subframe.
Step 504, UE was fed back on corresponding sub-frame of uplink n for the aperiodic of the field F CSI sub-frame set indicated
CSI。
Assuming that the sending cycle of TCI is T radio frames, the then aperiodic CSI fed back targeted CSI sub-frame set and UE
The value of the field F detected in some TCI sending cycle is related.A kind of implementation according to the invention, above-mentioned TCI are sent
Period is to include the TCI sending cycle where the uplink DCI of aperiodic CSI request；Another realization side according to the invention
Formula, above-mentioned TCI sending cycle are the TCI sending cycle fed back where the sub-frame of uplink of aperiodic CSI request.Wherein, for upper
State two kinds of implementations, a kind of possible corresponding relationship of the value of F and aperiodic CSI subframe collection is as shown in table 8 or table 9.
When table 8F field is 1 bit, the value of the field and aperiodic CSI subframe collection corresponding relationship
| F field value | Corresponding meaning |
| ’0’ | Feedback is directed to CHAperiodic CSI |
| ‘1’ | Feedback is directed to CLAperiodic CSI |
When table 9F field is 2 bit, the value of the field and aperiodic CSI subframe collection corresponding relationship
| F field value | Corresponding meaning |
| ’00’ | Feedback is directed to CHAperiodic CSI |
| ’01’ | Feedback is directed to CLAperiodic CSI |
| ‘10’ | Feedback is directed to C simultaneouslyHAnd CLAperiodic CSI |
| ‘11’ | Retain |
Specifically, if according to the instruction of CSI subframe set pointer section F in step 502, UE should be fed back for CSI
Subframe collection CHAperiodic CSI, then the CSI reference resources of UE are in downlink subframe n-nrefIt is interior, and UE further measure it is aperiodic
CSI.Wherein, if if UE UE is configured with downlink transfer mode TM1~9 or other downlinks TM and is only configured with one
CSI process, then nrefIt is to be located at CSI reference resources to contain uplink scheduling signaling (UL Grant) institute for triggering aperiodic CSI
Effective downlink subframe；If UE is configured with 2 or 3 CSI processes, for example, configurating downlink TM10 and the CSI process configured
Number is equal to 2 or 3, then nrefTo meet nrefMore than or equal to 4 and n-nrefBelong to CHMinimum value；If UE be configured with 4 CSI into
Journey, for example, the configurating downlink TM10 and CSI process number configured is equal to 4, then nrefTo meet nrefMore than or equal to 5 and n-nrefBelong to
In CHMinimum value.
If UE should be fed back for CSI subframe collection C according to the instruction of bit F in step 502LAperiodic CSI, then
The CSI reference resources of UE are in downlink subframe n-nrefIt is interior, and UE further measures aperiodic CSI.Wherein, if if UE UE
It is configured with downlink transfer mode TM1~9 or other downlinks TM and is only configured with a CSI process, then nrefIt is to join CSI
Examine resource be located at contain the effective downlink subframe triggered where the uplink scheduling signaling (UL Grant) of aperiodic CSI；If
UE is configured with 2 or 3 CSI processes, for example, the configurating downlink TM10 and CSI process number configured is equal to 2 or 3, then nrefIt is full
Sufficient nrefMore than or equal to 4 and n-nrefBelong to CLMinimum value；If UE is configured with 4 CSI processes, for example, configurating downlink TM10
And the CSI process number configured is equal to 4, then nrefTo meet nrefMore than or equal to 5 and n-nrefBelong to CLMinimum value.
So far, this application scene process terminates.According to this application scene, currently practical TDD or more can be used to indicate
A bit is added in the common physical layer signaling of row configuration, is used to indicate targeted CSI of the aperiodic CSI feedback of triggering
Frame collection.
Application scenarios four:
In this application scene, to each CSI feedback subframe n, directly defines its CSI reference resources and be located at the certain place of satisfaction
Manage a nearest downlink subframe n-n for time requirementref.To according to downlink subframe n-nrefBelong to CHOr CLIt is current to determine
Aperiodic CSI report is to trigger the aperiodic CSI of which CSI subframe collection.
As shown in Figure 6, comprising the following steps:
Step 601, UE receives eNB signaling and obtains CHAnd CLCorresponding subframe position.
Wherein the signaling is usually cell system message or rrc layer signaling, CHAnd CLCorresponding subframe position passes through ratio
The mode of spy's mapping (Bit Map) indicates.
Step 602, UE detects the uplink DCI for carrying aperiodic CSI request in CSI request subframe.
Step 603, UE feeds back the aperiodic CSI for corresponding CSI sub-frame set on corresponding sub-frame of uplink n.
Specifically, the CSI reference resources of UE are in downlink subframe n-nrefIt is interior, and UE further measures aperiodic CSI.Its
In, if if UE UE is configured with downlink transfer mode TM1~9 or other downlinks TM and is only configured with a CSI process,
Then nrefIt is to keep CSI reference resources effective where triggering the uplink scheduling signaling (UL Grant) of aperiodic CSI positioned at containing
Downlink subframe；If UE is configured with 2 or 3 CSI processes, for example, configurating downlink TM10 and configure CSI process number be equal to 2
Or 3, then nrefTo meet nrefMore than or equal to 4 and n-nrefTo belong to DHOr DLDownlink subframe minimum value；If UE is configured with 4
A CSI process, for example, the configurating downlink TM10 and CSI process number configured is equal to 4, then nrefTo meet nrefMore than or equal to 5 and
n-nrefTo belong to DHOr DLDownlink subframe minimum value.
So far, this application scene process terminates.As above, by directly defining CSI feedback subframe and CSI reference resources place
The corresponding relationship of subframe may be implemented for CHAnd CLAperiodic CSI feedback triggering.
Corresponding to the above method, as shown in fig. 7, the embodiment of the present invention also proposed a kind of terminal 100, including receiving module
110, judgment module 120 and sending module 130 are detected.
Wherein, receiving module 110 is used to receive the signaling information of eNB transmission, obtains CHAnd CLCorresponding subframe position；Its
In, CHAnd CLCorresponding different sub-frame set；
Detect uplink DCI information of the judgment module 120 for the aperiodic CSI request of detection carrying in CSI request subframe；
Sending module 130 is for being directed to the aperiodic of corresponding CSI sub-frame set to eNB feedback on corresponding sub-frame of uplink
CSI。
Wherein, CHFor flexible sub-frame set, CLFor fixed downlink subframe set；Alternatively,
CHFor strongly disturbing downlink or flexible sub-frame set, CLFor the downlink subframe set of weak jamming or fixation.
Specifically, if detection judgment module 120 is for belonging to set DHCSI request subframe detect it is aperiodic
CSI request, then sending module 130 is used to be directed to C in corresponding sub-frame of uplink feedbackHAperiodic CSI；If detection judges mould
Block 120 is for belonging to set DLCSI request subframe detect aperiodic CSI request, then sending module 130 be used for corresponding
Sub-frame of uplink feedback be directed to CLAperiodic CSI；Wherein, DHAnd DLCorresponding different downlink subframe set；
Alternatively, if sending module 130 is used to belong to set U according to aperiodic CSI requestHCSI feedback subframe it is anti-
Aperiodic CSI is presented, then the aperiodic CSI is directed to CH；If sending module 130 is used to belong to collection according to aperiodic CSI request
Close ULCSI feedback subframe feed back aperiodic CSI, then the aperiodic CSI is directed to CL；Wherein, UHAnd ULCorresponding different uplink
Frame set.
Specifically, receiving module 110 is further used for receiving the explicit or implicit signaling that eNB is sent, detection judges mould
Block 120 obtains the affiliated sub-frame set of CSI request subframe or CSI feedback subframe according to explicit or implicit signaling；Alternatively,
Detection judgment module 120 be further used for according to communication standard arrange the criteria for classifying, obtain CSI request subframe or
Sub-frame set belonging to CSI feedback subframe.
Specifically, the bit indication information for the high-level signaling that explicit signaling packet eNB is sent；Alternatively,
Implicit signaling includes detecting the PDCCH or EPDCCH of the uplink DCI format that judgment module 120 detects in the UE
Index in the specific search space PDCCH or EPDCCH, wherein the PDCCH or EPDCCH of uplink DCI format include aperiodic
CSI request.Wherein, the specific search space PDCCH/EPDCCH UE has clear meaning in LTE protocol.
As the embodiment of terminal 100, receiving module 110 is further used for detecting uplink DCI information, and therefrom obtains non-
Period CSI request bit, detection judgment module 120 are further used for determining what needs were fed back according to aperiodic CSI request bit
The sub-frame set that aperiodic CSI is directed to.
Specifically, detection judgment module 120 is further used for being asked according to aperiodic CSI as configurating downlink TM1~9
Bit is asked to determine the targeted subframe collection C of each CSI for needing to feed backHAnd/or CL。
Specifically, when being configured with multiple CSI processes, for example, configurating downlink TM10 and supporting multiple CSI processes, examine
Judgment module 120 is surveyed to be further used for determining the one or more CSI processes for needing to feed back according to aperiodic CSI request bit.
Specifically, when being configured with multiple CSI processes, for example, configurating downlink TM10 and supporting multiple CSI processes, examine
Judgment module 120 is surveyed to be further used for determining that each CSI process for needing to feed back is targeted according to aperiodic CSI request bit
Subframe collection CHAnd/or CL。
As the embodiment of terminal 100, receiving module 110 be further used for detection be used to indicate flexible TDD reconfigure it is small
The physical layer signaling of the currently practical TDD uplink-downlink configuration in area, and corresponding indication field is therefrom obtained, determine the non-week for needing to feed back
Phase CSI targeted subframe collection CHAnd/or CL。
As the embodiment of terminal 100, detects judgment module 120 and be further used for according to predefined minimum interval
G is determined before CSI feedback subframe, and is greater than subframe belonging to first downlink subframe of G with the interval of CSI feedback subframe
Collection is the CHOr CL。
Disclosed above equipment according to the present invention defines CSI sub-frame set mark, terminal by way of implicitly or explicitly
It obtains during aperiodic CSI feedback after the instruction information of CSI sub-frame set, can be realized in the flexible reconfiguring cell TDD
For CHAnd CLAperiodic CSI feedback, improve system performance.Further it is proposed that above equipment, to existing
Equipment or system change very little, will not influence the compatibility of equipment, and its realization is not only simple but also efficient.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the present invention.
Claims (23)
1. a kind of method of aperiodic CSI feedback in flexible reconfiguring cell TDD characterized by comprising
Step A:UE receives the signaling information that eNB is sent, and obtains CHAnd CLCorresponding subframe position；Wherein, CHAnd CLIt is corresponding different
Sub-frame set；
Step B: the UE detects the uplink DCI information for carrying aperiodic CSI request in CSI request subframe；
Step C: the UE is directed to the aperiodic of corresponding CSI sub-frame set to eNB feedback on corresponding sub-frame of uplink
CSI。
2. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as described in claim 1, which is characterized in that
The CHFor flexible sub-frame set, the CLFor fixed downlink subframe set；Alternatively,
The CHFor strongly disturbing downlink or flexible sub-frame set, the CLFor the downlink subframe set of weak jamming or fixation.
3. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as described in claim 1, which is characterized in that also wrap
It includes:
If UE is belonging to set DHCSI request subframe detect aperiodic CSI request, then UE is anti-in corresponding sub-frame of uplink
Feedback is directed to CHAperiodic CSI；If UE is belonging to set DLCSI request subframe detect aperiodic CSI request, then UE exists
Corresponding sub-frame of uplink feedback is directed to CLAperiodic CSI；Wherein, DHAnd DLCorresponding different CSI request sub-frame set；
Alternatively, if UE is belonging to set U according to aperiodic CSI requestHCSI feedback subframe feed back aperiodic CSI, then this is non-
Period CSI is directed to CH；If UE is belonging to set U according to aperiodic CSI requestLCSI feedback subframe feed back aperiodic CSI,
Then the aperiodic CSI is directed to CL；Wherein, UHAnd ULCorresponding different CSI feedback sub-frame set.
4. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as claimed in claim 3, which is characterized in that
Sub-frame set belonging to the CSI request subframe or CSI feedback subframe by the UE receive that the eNB sends explicit or
Implicit signaling obtains；Alternatively,
The division that sub-frame set belonging to the CSI request subframe or CSI feedback subframe is arranged by the UE according to communication standard
Standard obtains.
5. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as claimed in claim 4, which is characterized in that
The explicit signaling includes:
The bit indication information for the high-level signaling that the eNB is sent；Alternatively,
The implicit signaling includes:
The PDCCH or EPDCCH for the uplink DCI format that the UE is detected search for empty in the UE specific PDCCH or EPDCCH
Interior index, wherein the PDCCH or EPDCCH of the uplink DCI format include aperiodic CSI request.
6. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as described in claim 1, which is characterized in that described
Step B further include:
The UE obtains aperiodic CSI request bit from the uplink DCI, is determined according to the aperiodic CSI request bit
The CSI sub-frame set for needing to feed back.
7. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as claimed in claim 6, which is characterized in that according to
The aperiodic CSI request bit determines the CSI sub-frame set for needing to feed back, comprising:
The UE determines the corresponding sub-frame set C of CSI for needing to feed back according to the aperiodic CSI request bitHAnd/or CL。
8. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as claimed in claim 6, which is characterized in that also wrap
It includes:
The UE determines one or more CSI processes for needing to feed back according to the aperiodic CSI request bit.
9. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as claimed in claim 6, which is characterized in that described
UE determines each sub-frame set C for needing the CSI process fed back to be directed to according to the aperiodic CSI request bitHAnd/or CL。
10. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as described in claim 1, which is characterized in that
Before step B, further includes:
The UE obtains the downlink for needing the aperiodic CSI fed back to be directed to by receiving the physical layer signaling that the eNB is sent
Frame set.
11. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as claimed in claim 10, which is characterized in that institute
State the instruction word in physical layer signaling of the UE by being used to indicate the currently practical TDD uplink-downlink configuration in the flexible reconfiguring cell TDD
Section determines the subframe collection C for needing the aperiodic CSI fed back targetedHAnd/or CL。
12. the method for aperiodic CSI feedback in the flexibly reconfiguring cell TDD as described in claim 1, which is characterized in that institute
Stating step C further comprises:
The UE determines before CSI feedback subframe according to predefined minimum interval G, and between CSI feedback subframe
Every greater than G first downlink subframe belonging to subframe collection be the CHOr CL, anti-to the eNB in the CSI feedback subframe
Feedback is directed to the CHOr CLAperiodic CSI.
13. a kind of terminal, which is characterized in that including receiving module, judgment module and sending module are detected,
The receiving module obtains C for receiving the signaling information of eNB transmissionHAnd CLCorresponding subframe position；Wherein, CHAnd CL
Corresponding different sub-frame set；
The detection judgment module, the uplink DCI information for the aperiodic CSI request of detection carrying in CSI request subframe；
The sending module, for being directed to the non-week of corresponding CSI sub-frame set to eNB feedback on corresponding sub-frame of uplink
Phase CSI.
14. terminal as claimed in claim 13, which is characterized in that the CHFor flexible sub-frame set, the CLIt is fixed
Downlink subframe set；Alternatively,
The CHFor strongly disturbing downlink or flexible sub-frame set, the CLFor the downlink subframe set of weak jamming or fixation.
15. terminal as claimed in claim 13, which is characterized in that if the detection judgment module is for belonging to set DH
CSI request subframe detect aperiodic CSI request, then the sending module be used for corresponding sub-frame of uplink feedback be directed to CH
Aperiodic CSI；If the detection judgment module is for belonging to set DLCSI request subframe detect aperiodic CSI
Request, then the sending module is used to be directed to C in corresponding sub-frame of uplink feedbackLAperiodic CSI；Wherein, DHAnd DLIt corresponds to not
Same CSI request sub-frame set；
Alternatively, if the sending module is used to belong to set U according to aperiodic CSI requestHCSI feedback subframe feedback it is non-
Period CSI, then the aperiodic CSI is directed to CH；If the sending module is used to belong to set U according to aperiodic CSI requestL
CSI feedback subframe feed back aperiodic CSI, then the aperiodic CSI is directed to CL；Wherein, UHAnd ULCorresponding different CSI feedback
Frame set.
16. terminal as claimed in claim 15, which is characterized in that the receiving module is further used for receiving the eNB hair
The explicit or implicit signaling sent, the detection judgment module obtain the CSI request subframe according to the explicit or implicit signaling
Or the affiliated sub-frame set of CSI feedback subframe；Alternatively,
The detection judgment module is further used for the criteria for classifying arranged according to communication standard, obtains the CSI request subframe
Or sub-frame set belonging to CSI feedback subframe.
17. terminal as claimed in claim 16, which is characterized in that
The explicit signaling includes the bit indication information for the high-level signaling that the eNB is sent；Alternatively,
The implicit signaling includes the PDCCH or EPDCCH of the uplink DCI format that the detection judgment module detects in UE spy
Index in the fixed search space PDCCH or EPDCCH, wherein the PDCCH or EPDCCH of the uplink DCI format include non-week
Phase CSI request.
18. terminal as claimed in claim 13, which is characterized in that the receiving module is further used for detecting the uplink
DCI information, and aperiodic CSI request bit is therefrom obtained, the detection judgment module is further used for according to described aperiodic
CSI request bit determines the sub-frame set for needing the aperiodic CSI fed back to be directed to.
19. terminal as claimed in claim 18, which is characterized in that the detection judgment module is further used for according to described non-
Period CSI request bit determines the subframe collection C for needing the CSI fed back targetedHAnd/or CL。
20. terminal as claimed in claim 18, which is characterized in that the detection judgment module is further used for according to described non-
Period CSI request bit determines the one or more CSI processes for needing to feed back.
21. terminal as claimed in claim 18, which is characterized in that the detection judgment module is further used for according to described non-
Period CSI request bit determines the targeted subframe collection C of each CSI process for needing to feed backHAnd/or CL。
22. terminal as claimed in claim 13, which is characterized in that the receiving module is further used for detection and is used to indicate spirit
The physical layer signaling of the currently practical TDD uplink-downlink configuration in the reconfiguring cell TDD living, and corresponding indication field is therefrom obtained, it determines
The aperiodic CSI for needing to feed back targeted subframe collection CHAnd/or CL。
23. terminal as claimed in claim 13, which is characterized in that the detection judgment module is further used for according to predefined
Minimum interval G, determine before CSI feedback subframe, and with CSI feedback subframe interval be greater than G first downlink
Subframe collection belonging to subframe is the CHOr CL。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310488010.XA CN104113397B (en) | 2013-04-16 | 2013-10-17 | The method and apparatus of aperiodic CSI feedback in flexible TDD reconfiguration system |
| PCT/KR2014/004924 WO2015020308A1 (en) | 2013-08-08 | 2014-06-03 | Method and apparatus for feeding back aperiodic csi in flexible tdd reconfiguration system |
| US14/295,177 US9923699B2 (en) | 2013-08-08 | 2014-06-03 | Method and apparatus for feeding back aperiodic CSI in flexible TDD reconfiguration system |
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| CN201310132188.0 | 2013-04-16 | ||
| CN201310132188 | 2013-04-16 | ||
| CN2013101321880 | 2013-04-16 | ||
| CN201310344515.9 | 2013-08-08 | ||
| CN2013103445159 | 2013-08-08 | ||
| CN201310344515 | 2013-08-08 | ||
| CN201310488010.XA CN104113397B (en) | 2013-04-16 | 2013-10-17 | The method and apparatus of aperiodic CSI feedback in flexible TDD reconfiguration system |
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| WO2016105127A1 (en) | 2014-12-23 | 2016-06-30 | 엘지전자 주식회사 | Method for transceiving enhanced physical downlink control channel in wireless access system supporting unlicensed band, and device supporting same |
| WO2018030714A1 (en) * | 2016-08-11 | 2018-02-15 | 엘지전자 주식회사 | Method for reporting channel state in wireless communication system and device therefor |
| CN109802787B (en) | 2017-11-17 | 2021-01-08 | 维沃移动通信有限公司 | Transmission method for Transmission Configuration Indication (TCI), network side equipment and terminal equipment |
| WO2019120221A1 (en) * | 2017-12-22 | 2019-06-27 | 华为技术有限公司 | Method and device for transmitting wireless signals by means of pdsch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102468933A (en) * | 2010-11-15 | 2012-05-23 | 华为技术有限公司 | Method, device and system for feeding back channel state information |
| CN102893686A (en) * | 2010-11-09 | 2013-01-23 | 瑞典爱立信有限公司 | Method and arrangement for reporting channel state information in telecommunication system |
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| CN102893686A (en) * | 2010-11-09 | 2013-01-23 | 瑞典爱立信有限公司 | Method and arrangement for reporting channel state information in telecommunication system |
| CN102468933A (en) * | 2010-11-15 | 2012-05-23 | 华为技术有限公司 | Method, device and system for feeding back channel state information |
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