CN105429683A - 3D MIMI transmission method and device - Google Patents
3D MIMI transmission method and device Download PDFInfo
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- CN105429683A CN105429683A CN201410476200.4A CN201410476200A CN105429683A CN 105429683 A CN105429683 A CN 105429683A CN 201410476200 A CN201410476200 A CN 201410476200A CN 105429683 A CN105429683 A CN 105429683A
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Abstract
The invention brings forward a 3D MIMI (Massive Multiple Input Multiple Output) transmission method and device. In the first step, UE sends a first CSI (Channel Status Indicator), and a reference resource of the first CSI is a first RS (Reference Signal). In the second step, the UE sends a second CSI, and a reference resource of the second CSI is a second RS. The first CSI includes a first PMI (Precoding Matrix Indicator), and the first RS is a broadband RS. The second CSI includes at least one of a second PMI and a second CQI (Channel Quality Indicator), the second RS is a narrowband RS, and the first RS and the second RS are sent by the same cell. According to the scheme, the UE estimates the second CSI according to a narrowband measurement RS sent by precoding, the estimation precision of the second CSI is improved, and the air interface cost brought by measuring of the RS is reduced. Moreover, a conventional LTE design is utilized as much as possible, and compatibility with a conventional system is kept to the maximum.
Description
Technical field
The present invention relates to the scheme that in mobile communication technology field, channel status is measured and fed back, particularly relate to and have employed FD (FullDimension, full dimension)-MIMO (MassiveMultipleInputMultipleOutput, extensive Multiinputoutput) technology mobile communication system in downlink channel state measurement and feedback scheme.
Background technology
Traditional 3GPP (3rdGenerationPartnerProject, third generation partner program) LTE (LongTermEvolution, Long Term Evolution) in system, CSI (ChannelStatusIndicator, the channel status indicates) feedback of descending mimo channel mainly contains two kinds of modes
● feedback implicit expression CSI
UE (UserEquipment, subscriber equipment) by detecting CRS (CellspecificReferenceSignal, the specific reference signal in community) or CSI-RS (CSIR eferenceSignal, channel status instruction reference signal) obtain CIR (ChannelImpulseResponse, channel impulse response) and be mapped as implicit expression CSI, described implicit expression CSI comprises PTI (PrecodingTypeIndicator, precoding type indicates), RI (RankIndicator, order indicates), CQI (ChannelQualityIndicator, channel quality indicates), PMI (PrecodingMatrixIndicator, pre-coding matrix indicate) etc. information.
Accompanying drawing 1 is based on NormalCP (NormalCyclicPrefix in an existing LTE system, normal cyclic prefix) CSI-RS pattern-simultaneously indicated CRS and DMRS (DemodulationReferenceSignal, demodulated reference signal), one of them lattice is the least resource unit-RE (ResourceElement, resource particle) of LTE.The RE that oblique line indicates can be used for sending CSI-RS (community takies at most 8 RE wherein), and the RE of cross spider mark can be used for sending DMRS, and the RE adding thick line mark can be used for sending CRS.LTE system adopts the concept definition RS resource of port: a RS port may be mapped to a physical antenna, is also likely that many physical antennas are by merging the virtual antenna of superposition formation one.LTE defines 4 kinds of CSI-RS port numbers: 1,2,4,8, and the RE indicating numeral in accompanying drawing 1 illustrates the pattern instance of one group of 8CSI-RS port, numeral port index.
● feedback SRS (SoundingReferenceSignal, uplink sounding reference signal)
UE sends uplink SRS, and system side obtains up channel CSI by demodulation SRS, then obtains descending CSI according to link symmetry.The method is mainly applicable to TDD (TimeDuplexDivision, time division duplex) system.FDD (FrequencyDuplexDivision, Frequency Division Duplexing (FDD)) system is generally inapplicable.
As a kind of new Cellular Networks antenna frame, Massive (on a large scale) MIMO becomes a study hotspot recently.The typical feature of MassiveMIMO system is that quantity by increasing antenna array unit obtains a series of gain to larger value, and such as, power system capacity continues to increase along with the increase of antenna amount in theory; The coherent superposition of transmitting antenna signal reduces transmitting power etc.
3GPPR (Release, version) 12 has formulated 3D (Dimension) mimo channel model.In RAN (RadioAccessNetwork, wireless access network) #65 meeting, FD-MIMO is approved for the research topic of 3GPPR13.FD-MIMO most study reaches the scene of 64 physical antennas.
The challenge that FD-MIMO faces how to guarantee that base station equipment obtains descending CSI accurately.Current is based on TDD system about the research that MassiveMIMO is main, namely utilizes SRS and link symmetry to be that system side obtains descending CSI.Consider the limitation (such as FDD is difficult to adopt, the asymmetry of radio frequency link, SRS pilot pollution, and SRS resource is limited, can not indicate CQI etc.) of SRS, implicit expression CSI may still play an important role in MassiveMIMO transmission.UE needs to detect down-run survey RS (ReferenceSignal, reference signal) to obtain implicit expression CSI.Due to the physical antenna quantity in MassiveMIMO comparatively large (traditional CSI-RS port number is not more than 8), the orthogonality that down-run survey RS may take the most running time-frequency resource-in subframe and then cannot meet between community.Further, if UE directly feeds back the CSI for all physical antennas, the empty overhead brought also is unacceptable.
For the problems referred to above, the present invention proposes a kind of 3DMIMO transmission method and device.
Summary of the invention
The invention discloses a kind of method in UE, wherein, comprise the steps:
-steps A. the reference resources sending a CSI, a CSI is a RS
The reference resources that-step B. sends the 2nd CSI, the 2nd CSI is the 2nd RS
Wherein, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and a RS and the 2nd RS is sent by same community.
A described RS be broadband refer to that the RE (ResourceElement, resource particle) that a RS takies is distributed in all frequency domain units of the downlink resource of described community.Described 2nd RS be arrowband refer to that the RE that the 2nd RS takies is distributed in the part frequency domain unit of the downlink resource of described community.If described community is FDD community, described downlink resource is the descending carrier of described community; If described community is TDD cell, described downlink resource is the carrier wave of described community.As an embodiment, described frequency domain unit refers to the difference of the center frequency point of two adjacent R E that a RS port of a RS takies in an OFDM (OrthogonalFrequencyDivisionMultiplexing, OFDM) symbol.As an embodiment, described frequency domain unit is PRBP (PhysicalResourceBlockPair, Physical Resource Block to).
As an embodiment, the 2nd RS only appears in a frequency domain unit of the downlink resource of described community.As an embodiment, the RE of each the RS port in the 2nd RS is equally spaced to be distributed on whole frequency bands of the downlink resource of described community, and described interval is greater than described frequency domain unit.As an embodiment, on the downlink resource that the 2nd RS appears at described community in continuous print U frequency domain unit, described U is greater than 1.As an embodiment, the 2nd RS appears in U discrete on the downlink resource of described community frequency domain unit, and described U is greater than 1.
As an embodiment, described UE supposes the 2nd CQI calculated under the transmission community of a RS adopts the 2nd PMI to carry out the condition of precoding.As an embodiment, the 2nd PMI is arrowband PMI, for the frequency band of the 2nd RS.
As an embodiment, the 2nd RS comprises 2 RS ports.2 RS ports may be used for two polarised directions indicating cross polarised antenna.
As an embodiment, the maintenance base station of described community is the vertical antenna battle array of 8 antenna compositions, and a PMI indicates the relative phase between 8 antennas.
Concrete, according to an aspect of the present invention, it is characterized in that, described steps A also comprises the steps:
-steps A 1. sends the 3rd CSI, and the reference resources of the 3rd CSI is the 3rd RS
Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community.
As an embodiment, the 2nd PMI and the 3rd PMI is respectively for the physical antenna of horizontal direction and the physical antenna of vertical direction.
As an embodiment, transmission cycle and the transmission subframe of the 3rd RS equal the transmission cycle of the 2nd RS respectively and send subframe.
Concrete, according to an aspect of the present invention, it is characterized in that, described step B also comprises the steps:
-step B1. receives the first signaling and determines L PRBP group, and described PRBP group comprises positive integer continuous print PRBP on frequency domain
-step B2. receives the second signaling and determines that 1 target P RBP group in described L PRBP group is the PRBP that the 2nd RS takies, or is the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.
The PRBP that the PRBP that described 2nd RS the takies RE that is the 2nd RS takies distributes.As an embodiment, described L the center frequency point that PRBP group takies increases successively or reduces successively.As an embodiment, the second signaling is descending scheduling signaling.As an embodiment, described U is 1.As an embodiment, described U is configurable.
As an embodiment, described time-domain position is the position of transmission subframe in the CSI sub-frame set belonging to the 2nd RS of the 2nd RS, each subframe of described UE in the CSI sub-frame set belonging to described 2nd RS receives in turn the arrowband RS in a PRBP group in described L PRBP group.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
-step C. receives the downstream signal through pre-encode operation
Wherein, the pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { CSI, the 2nd CSI}, or { CSI, the 2nd CSI, the 3rd CSI}.At least one during described downstream signal comprises { downlink physical layer data, down physical layer signaling } and descending DMRS.
As an embodiment, if the 3rd CSI exist, described in report CSI gather comprise the 3rd CSI.
As an embodiment, described physical layer data is in the upper transmission of PDSCH (PhysicalDownlinkSharedChannel, Physical Downlink Shared Channel).As an embodiment, described down physical layer signaling is in the upper transmission of EPDCCH (EnhancedPhysicalDownlinkControlChannel, the Physical Downlink Control Channel of enhancing).
Concrete, according to an aspect of the present invention, it is characterized in that, in the PRBP shared by the 2nd RS, described UE is configured to monitor P RS port set, and the 2nd RS is 1 target RS port set in described P RS port set, and described RS port set comprises 1 or 2 RS ports, 2nd CSI indicates the index of described target RS port set in described P RS port set, and described P is positive integer.
As an embodiment, the RS port sum in described P RS port set is not more than 8, is namely no more than the maximum port number of CSI-RS, can not increases presence of intercell interference.
Concrete, according to an aspect of the present invention, it is characterized in that, a CSI also comprises sub-band index, and described sub-band index indicates the part frequency domain unit of the downlink resource of described community.The frequency band for descending scheduling that described sub-band index indicates described UE to recommend.
Concrete, according to an aspect of the present invention, it is characterized in that, the 2nd RS only takies a subframe in time domain.
As an embodiment, the sub-frame set that a RS takies and the subframe that the 2nd RS takies are orthogonal.
Concrete, according to an aspect of the present invention, it is characterized in that, one RS comprises K1 RS port, 2nd RS comprises K2 RS port, and the 3rd RS comprises K3 RS port, described K1, described K2 and described K3 be all be not more than 8 positive integer, the pattern of CSI-RS port in PRBP reused by the pattern of described RS port in PRBP.
Described RS port is sent by 1 or multiple physical antenna.
The invention discloses a kind of method in base station, wherein, comprise the steps:
-steps A. the reference resources receiving a CSI, a CSI is a RS
The reference resources that-step B. receives the 2nd CSI, the 2nd CSI is the 2nd RS
Wherein, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and a RS and the 2nd RS is sent by same community.
Described community is maintained by described base station.
Concrete, according to an aspect of the present invention, it is characterized in that, described steps A also comprises the steps:
-steps A 1. receives the 3rd CSI, and the reference resources of the 3rd CSI is the 3rd RS
Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community.
Concrete, according to an aspect of the present invention, it is characterized in that, described step B also comprises the steps:
-step B1. sends the first signaling instruction L PRBP group, described PRBP group comprise positive integer individual on frequency domain continuous print PRBP
-step B2. sends the second signaling and indicates 1 target P RBP group in described L PRBP group to be the PRBP that the 2nd RS takies, or is the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.
Concrete, according to an aspect of the present invention, it is characterized in that, also comprise the steps:
-step C. sends the downstream signal through pre-encode operation
Wherein, the pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { CSI, the 2nd CSI}, or { CSI, the 2nd CSI, the 3rd CSI}.At least one during described downstream signal comprises { downlink physical layer data, down physical layer signaling } and descending DMRS.
Concrete, according to an aspect of the present invention, it is characterized in that, the RS signal of each the RS port in the 2nd RS adopts the mode of precoding to send by K4 physical antenna, corresponding precoding vector is V, and described K4 is positive integer, and described V determines by a PMI is auxiliary.
Concrete, according to an aspect of the present invention, it is characterized in that, in the PRBP shared by the 2nd RS, described UE is configured to monitor P RS port set, and the 2nd RS is 1 target RS port set in described P RS port set, and described RS port set comprises 1 or 2 RS ports, 2nd CSI indicates the index of described target RS port set in described P RS port set, and described P is positive integer.
Concrete, according to an aspect of the present invention, it is characterized in that, a CSI also comprises sub-band index, and described sub-band index indicates the part frequency domain unit of the downlink resource of described community.The candidate band of downlink transfer is carried out according to the transmission UE that described sub-band index determines scheduling the one CSI in described base station.
If described community is FDD community, described downlink resource is the descending carrier of described community; If described community is TDD cell, described downlink resource is the carrier wave of described community.
Concrete, according to an aspect of the present invention, it is characterized in that, the 2nd RS only takies a subframe in time domain.
Concrete, according to an aspect of the present invention, it is characterized in that, one RS comprises K1 RS port, 2nd RS comprises K2 RS port, and the 3rd RS comprises K3 RS port, described K1, described K2 and described K3 be all be not more than 8 positive integer, the pattern of CSI-RS port in PRBP reused by the pattern of described RS port in PRBP.
The invention discloses a kind of subscriber equipment, it is characterized in that, this equipment comprises:
First module: for sending a CSI, the reference resources of a CSI is a RS
Second module: for sending the 2nd CSI, the reference resources of the 2nd CSI is the 2nd RS
3rd module: for receiving the downstream signal through pre-encode operation
Wherein, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and a RS and the 2nd RS is sent by same community.The pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { at least one during described downstream signal comprises for a CSI, the 2nd CSI} { downlink physical layer data, down physical layer signaling } and descending DMRS.
As an embodiment, the feature of the said equipment is, the first module also for:
-. the reference resources sending the 3rd CSI, the 3rd CSI is the 3rd RS
Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community, described in report CSI gather also comprise the 3rd CSI.
As an embodiment, the feature of the said equipment is, the second module also for:
-. receive the first signaling and determine L PRBP group, described PRBP group comprises positive integer continuous print PRBP on frequency domain
-. receive the second signaling and determine that 1 target P RBP group in described L PRBP group is the PRBP that the 2nd RS takies, or be the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.
The invention discloses a kind of base station equipment, it is characterized in that, this equipment comprises:
First module: for receiving a CSI, the reference resources of a CSI is a RS
Second module: for receiving the 2nd CSI, the reference resources of the 2nd CSI is the 2nd RS
3rd module: for sending the downstream signal through pre-encode operation
Wherein, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and a RS and the 2nd RS is sent by same community.The pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { at least one during described downstream signal comprises for a CSI, the 2nd CSI} { downlink physical layer data, down physical layer signaling } and descending DMRS.
As an embodiment, the feature of the said equipment is, the first module also for:
-. the reference resources receiving the 3rd CSI, the 3rd CSI is the 3rd RS
Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community, described in report CSI gather also comprise the 3rd CSI.
As an embodiment, the feature of the said equipment is, the second module also for:
-. send the first signaling instruction L PRBP group, described PRBP group comprise positive integer individual on frequency domain continuous print PRBP
-. send the second signaling and indicate 1 target P RBP group in described L PRBP group to be the PRBP that the 2nd RS takies, or be the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.
Taking this problem of too much interface-free resources for measuring RS and the CSI that reports in MassiveMIMO system, of the present inventionly proposing a kind of classification measurement and feedback scheme, UE determines a CSI according to wide-band width measurement RS, determines the 2nd CSI according to narrow band detection RS.Down channel is determined jointly according to a CSI and the 2nd CSI in base station.As an embodiment, described narrow band detection RS adopts the specific precoding mode of UE to send, and corresponding pre-coding matrix is determined according to a CSI is auxiliary by described base station.The narrow band detection RS that precoding sends possesses the good quality of reception in UE side, improves the estimated accuracy of the 2nd CSI, saves the empty overhead measured RS and bring simultaneously.In addition, the present invention reuses existing LTE as far as possible and designs, and at utmost maintains the compatibility with existing system.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more apparent:
Fig. 1 shows the schematic diagram of the descending RS pattern of existing LTE system;
Fig. 2 shows CSI feedback flow chart according to an embodiment of the invention;
Fig. 3 shows the time-domain position schematic diagram of a RS according to an embodiment of the invention and the 2nd RS;
Fig. 4 shows the time-frequency location schematic diagram of the 2nd RS according to an embodiment of the invention;
Fig. 5 shows the mapping graph of 4X4 cross polarised antenna battle array to RS port of base station side according to an embodiment of the invention;
Fig. 6 shows the mapping graph of 4X8 vertical polarized antenna battle array to RS port of base station side according to an embodiment of the invention;
Fig. 7 shows the structured flowchart for the processing unit in UE according to an embodiment of the invention;
Fig. 8 shows the structured flowchart for the processing unit in base station according to an embodiment of the invention;
Embodiment
Hereafter will be described in further detail technical scheme of the present invention by reference to the accompanying drawings, and it should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine arbitrarily mutually.
Embodiment 1
Embodiment 1 is CSI feedback flow chart, as shown in Figure 2.In accompanying drawing 2, base station N1 is the serving BS of UEU2.The step identified in square frame F1 is optional step.
For UEU2, in the step s 21, a CSI is sent; In the step s 21, the 2nd CSI is sent; In step S23, receive the downstream signal through pre-encode operation.
For base station N1, in step s 11, a CSI is received; In step s 12, the 2nd CSI is received; In step s 13, the downstream signal through pre-encode operation is sent.
In embodiment 1, the reference resources of a CSI is a RS, and a CSI comprises a PMI, and a RS is broadband; The reference resources of the 2nd CSI is the 2nd RS, and the 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband.One RS and the 2nd RS is sent by same community, and described community is maintained by base station N1.The pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { CSI, the 2nd CSI}.At least one during described downstream signal comprises { downlink physical layer data, down physical layer signaling } and descending DMRS.
As the sub-embodiment 1, UEU2 of embodiment 1 in step S210, the reference resources sending the 3rd CSI, the 3rd CSI is the 3rd RS.Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community.The described CSI of reporting set comprises the 3rd CSI.
Sub-embodiment the 2, one CSI as embodiment 1 also comprises sub-band index, and described sub-band index indicates the part frequency domain unit of the downlink resource of described community.UE has the good quality of reception on the frequency band that described sub-band index is corresponding.Base station N1 is according to the transmission band of described sub-band index assisted Selection the 2nd RS.
As the sub-embodiment 3 of embodiment 1, in the PRBP shared by the 2nd RS, base station N1 configuration UE monitoring P RS port set, 2nd RS is 1 target RS port set in described P RS port set, described RS port set comprises 1 or 2 RS ports, 2nd CSI indicates the index of described target RS port set in described P RS port set, and described P is positive integer.The pattern of CSI-RS port reused by the pattern of described RS port in PRBP.
Embodiment 2
Embodiment 2 is time-domain position schematic diagrames of a RS and the 2nd RS, as shown in Figure 3.In accompanying drawing 3, the grid that oblique line identifies is the subframe in the CSI sub-frame set belonging to a RS, and the grid that bold box identifies is the subframe in the CSI sub-frame set belonging to the 2nd RS.
CSI sub-frame set belonging to one RS is a CSI sub-frame set (the grid composition of oblique line mark), and the CSI sub-frame set belonging to the 2nd RS is the 2nd CSI sub-frame set (the grid composition of bold box mark).One CSI sub-frame set and the 2nd CSI sub-frame set are configured by high-level signaling.
As a sub-embodiment of embodiment 2, all subframes of a RS in a CSI sub-frame set send, the 2nd RS only sends in 1 subframe of the 2nd CSI sub-frame set.
The essence of above-mentioned sub-embodiment is: UE can utilize the RS in the multiple subframes in a CSI sub-frame set to carry out channel estimating and obtain a PMI, and the RS in 1 subframe in the 2nd CSI sub-frame set can only be utilized to carry out channel estimating acquisition the 2nd PMI.The RS considering in the 2nd CSI sub-frame set is through precoding processing, and the RS in 1 subframe can obtain preferably precision of channel estimation.Because the arrowband RS in a subframe in the 2nd CSI sub-frame set can by multiple UE frequency division multiplexing, above-mentioned sub-embodiment significantly can save the expense of down-run survey RS,
Embodiment 3
Embodiment 3 is time-frequency location schematic diagrames of the 2nd RS, as shown in Figure 4.In accompanying drawing 4, the grid of oblique line mark is PRBP group, and the grid of bold box mark is the PRBP group that the 2nd RS takies.
First base station sends the first signaling instruction L PRBP group; Then 1 the target P RBP group determined in described L PRBP group according to the time-domain position of the 2nd RS is the PRBP that the 2nd RS takies.
First UE receives the first signaling and determines L PRBP group; Then 1 the target P RBP group determined in described L PRBP group according to the time-domain position of the 2nd RS is the PRBP that the 2nd RS takies.
In embodiment 3, the first signaling is high-level signaling, described L be greater than 1 positive integer.Described PRBP group comprises positive integer continuous print PRBP on frequency domain.One RS and the 2nd RS is positioned on first carrier.The frequency domain position of described L PRBP group on first carrier respectively as the P_1 in accompanying drawing 4, P_2 ..., shown in P_L.CSI sub-frame set (the SF_1 of described UE belonging to the 2nd RS, SF_2, ...) receive in described L PRBP group a PRBP group in turn on arrowband RS, therefore described UE can determine the frequency domain position of the 2nd RS according to described time-domain position (i.e. SF_2).
As the sub-embodiment 1 of embodiment 3, the quantity of PRB included in each PRBP group of described L PRBP group is independently.
As the sub-embodiment 2 of embodiment 3, the quantity of PRB included in each PRBP group of described L PRBP group is identical.
Embodiment 4
Embodiment 4 is 4X4 cross polarised antenna battle array mapping graphs to RS port of base station side, as shown in Figure 5.In accompanying drawing 5, a lattice represents a physical antenna, the RS port index that this physical antenna of numeral is wherein corresponding.
As shown in Figure 5,4 transmitting antennas with first polarised direction of a line adopt the mode of precoding to be mapped to same RS port (the RS sequence that namely described 4 transmitting antennas send same RS port forms a virtual-antenna).Similar, 4 transmitting antennas of the second polarised direction of same row adopt the mode of precoding to be mapped to same RS port.
In embodiment 4, a RS comprises RS port, and { 1,2,3,4}, the 3rd RS comprises RS port { 5,6,7,8}.One CSI comprises 4 row b
1first of row
3rd CSI comprises 4 row b
3the 3rd of row
b
1and b
3be all be not more than 4 positive integer.
with
kronecker product (KroneckerProduct) computing obtains the pre-coding matrix of 2 dimension array antennas
16 antennas as sub-embodiment 1, first polarised direction of embodiment 4 adopt
first row
precoding forms RS port, and { 9}, 16 antennas of the second polarised direction adopt
first row
precoding forms RS port { 10}.2nd RS comprises RS port, and { 9,10}, UE carry out channel estimating according to the 2nd RS and obtain the 2nd CSI, and the 2nd CSI comprises the 2nd PMI in order to the relative phase between two polarised directions.
16 antennas as sub-embodiment 2, first polarised direction of embodiment 4 adopt
precoding formation RS port 9 ..., 8+b
1b
3, 16 antennas of the second polarised direction adopt
precoding forms RS port { 9+b
1b
3..., 8+2b
1b
3.Further, b is formed
1b
3individual RS port set, each RS port set comprises 2 RS ports, that is: { 9,9+b
1b
3, { 10,10+b
1b
3..., { 8+b
1b
3, 8+2b
1b
3.
UE is from described b
1b
3select the good target RS port set of the quality of reception in individual RS port set, the 2nd RS comprises the RS port in described target RS port set.Further, UE carries out channel estimating according to the 2nd RS and obtains the 2nd PMI.UE feeds back the index of the 2nd PMI and described target RS port set.
Embodiment 5
Embodiment 5 is 4X8 vertical polarized antenna battle array mapping graphs to RS port of base station side, as shown in Figure 6.In accompanying drawing 6, a lattice represents a physical antenna, the RS port index that this physical antenna of numeral is wherein corresponding.
As shown in Figure 6,4 transmitting antennas of same row adopt the mode of precoding to be mapped to same RS port-RS port { 1-8}.Similar, 4 transmitting antennas with a line adopt the mode of precoding to be mapped to same RS port-RS port { 9-12}.
In embodiment 5, the antenna array similar (antenna array in embodiment 5 only has a polarised direction) of a polarised direction in the generating mode of the 2nd RS and embodiment 4.
In embodiment 5, owing to only there being a polarised direction, do not comprise the 2nd PMI in the 2nd CSI, the 2nd CSI comprises the 2nd CQI.
Embodiment 6
Embodiment 6 is the structured flowcharts for the processing unit in UE, as shown in Figure 7.In accompanying drawing 7, processing unit 300 by processing module 301, processing module 302, and receiver module 303 forms.
Processing module 301 is for sending a CSI, and the reference resources of a CSI is a RS; Processing module 302 is for sending the 2nd CSI, and the reference resources of the 2nd CSI is the 2nd RS; Receiver module 303 is for receiving the downstream signal through pre-encode operation.
In embodiment 6, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and a RS and the 2nd RS is sent by same community.The pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { described downstream signal comprises for a CSI, the 2nd CSI} { downlink physical layer data, down physical layer signaling } and descending DMRS.
As the sub-embodiment 1 of embodiment 6, processing module 301 is also for sending the 3rd CSI, and the reference resources of the 3rd CSI is the 3rd RS.Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community, described in report CSI gather also comprise the 3rd CSI.
As the sub-embodiment 2 of embodiment 6, processing module 302 also for:
-. receive the first signaling and determine L PRBP group, described PRBP group comprises positive integer continuous print PRBP on frequency domain
-. receive the second signaling and determine that 1 target P RBP group in described L PRBP group is the PRBP that the 2nd RS takies, or be the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group.
In the sub-embodiment 2 of embodiment 6, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.Described PRBP group comprises U PRBP, and described U is positive integer, and described U is constant or configurable.
Embodiment 7
Embodiment 7 is the structured flowcharts for the processing unit in base station, as shown in Figure 8.In accompanying drawing 8, processing unit 400 is by processing module 401, and processing module 402 and sending module 403 form.
Processing module 401 is for receiving a CSI, and the reference resources of a CSI is a RS; Processing module 402 is for receiving the 2nd CSI, and the reference resources of the 2nd CSI is the 2nd RS; Sending module 403 is for sending the downstream signal through pre-encode operation.
In embodiment 7, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and the same community that a RS and the 2nd RS is maintained by described base station sends.The pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises that { described downstream signal comprises downlink physical layer data and descending DMRS for a CSI, the 2nd CSI}.
As the sub-embodiment 1 of embodiment 7, processing module 401 is also for receiving the 3rd CSI, and the reference resources of the 3rd CSI is the 3rd RS.Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community, described in report CSI gather also comprise the 3rd CSI.
As the sub-embodiment 2 of embodiment 7, processing module 402 also for:
-. send the first signaling instruction L PRBP group, described PRBP group comprise positive integer individual on frequency domain continuous print PRBP
-. send the second signaling and indicate 1 target P RBP group in described L PRBP group to be the PRBP that the 2nd RS takies, or be the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group
In the sub-embodiment 2 of embodiment 7, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.Described PRBP group comprises U PRBP, and described U is positive integer, and described U is constant or configurable.
The all or part of step that one of ordinary skill in the art will appreciate that in said method can be carried out instruction related hardware by program and complete, and described program can be stored in computer-readable recording medium, as read-only memory, and hard disk or CD etc.Optionally, all or part of step of above-described embodiment also can use one or more integrated circuit to realize.Accordingly, each modular unit in above-described embodiment, can adopt example, in hardware to realize, and also can be realized by the form of software function module, the application is not limited to the combination of the software and hardware of any particular form.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improves, all should be included within protection scope of the present invention.
Claims (23)
1. the method in UE, wherein, comprises the steps:
-steps A. the reference resources sending a CSI, a CSI is a RS
The reference resources that-step B. sends the 2nd CSI, the 2nd CSI is the 2nd RS
Wherein, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and a RS and the 2nd RS is sent by same community.
2. method according to claim 1, is characterized in that, described steps A also comprises the steps:
-steps A 1. sends the 3rd CSI, and the reference resources of the 3rd CSI is the 3rd RS
Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community.
3. the method according to claim 1-2, is characterized in that, described step B also comprises the steps:
-step B1. receives the first signaling and determines L PRBP group, and described PRBP group comprises positive integer continuous print PRBP on frequency domain
-step B2. receives the second signaling and determines that 1 target P RBP group in described L PRBP group is the PRBP that the 2nd RS takies, or is the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.
4. the method according to claim 1-2, is characterized in that, also comprises the steps:
-step C. receives the downstream signal through pre-encode operation
Wherein, the pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { CSI, the 2nd CSI}, or { CSI, the 2nd CSI, the 3rd CSI}.At least one during described downstream signal comprises { downlink physical layer data, down physical layer signaling } and descending DMRS.
5. the method according to claim 1-2, it is characterized in that, in the PRBP shared by the 2nd RS, described UE is configured to monitor P RS port set, 2nd RS is 1 target RS port set in described P RS port set, described RS port set comprises 1 or 2 RS ports, and the 2nd CSI indicates the index of described target RS port set in described P RS port set, and described P is positive integer.
6. the method according to claim 1-5, is characterized in that, a CSI also comprises sub-band index, and described sub-band index indicates the part frequency domain unit of the downlink resource of described community.
7. the method according to claim 1-5, is characterized in that, the 2nd RS only takies a subframe in time domain.
8. the method according to claim 1-5, it is characterized in that, one RS comprises K1 RS port, 2nd RS comprises K2 RS port, 3rd RS comprises K3 RS port, described K1, described K2 and described K3 be all be not more than 8 positive integer, the pattern of CSI-RS port in PRBP reused by the pattern of described RS port in PRBP.
9. the method in base station, wherein, comprises the steps:
-steps A. the reference resources receiving a CSI, a CSI is a RS
The reference resources that-step B. receives the 2nd CSI, the 2nd CSI is the 2nd RS
Wherein, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and a RS and the 2nd RS is sent by same community.
10. method according to claim 9, is characterized in that, described steps A also comprises the steps:
-steps A 1. receives the 3rd CSI, and the reference resources of the 3rd CSI is the 3rd RS
Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community.
11. methods according to claim 9-10, it is characterized in that, described step B also comprises the steps:
-step B1. sends the first signaling instruction L PRBP group, described PRBP group comprise positive integer individual on frequency domain continuous print PRBP
-step B2. sends the second signaling and indicates 1 target P RBP group in described L PRBP group to be the PRBP that the 2nd RS takies, or is the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.
12. methods according to claim 9-10, is characterized in that, also comprise the steps:
-step C. sends the downstream signal through pre-encode operation
Wherein, the pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { CSI, the 2nd CSI}, or { CSI, the 2nd CSI, the 3rd CSI}.At least one during described downstream signal comprises { downlink physical layer data, down physical layer signaling } and descending DMRS.
13. methods according to claim 9-10, it is characterized in that, the RS signal of each the RS port in the 2nd RS adopts the mode of precoding to send by K4 physical antenna, and corresponding precoding vector is V, described K4 is positive integer, and described V determines by a PMI is auxiliary.
14. methods according to claim 9-10, it is characterized in that, in the PRBP shared by the 2nd RS, described UE is configured to monitor P RS port set, 2nd RS is 1 target RS port set in described P RS port set, described RS port set comprises 1 or 2 RS ports, and the 2nd CSI indicates the index of described target RS port set in described P RS port set, and described P is positive integer.
15. methods according to claim 9-10, it is characterized in that, a CSI also comprises sub-band index, and described sub-band index indicates the part frequency domain unit of the downlink resource of described community.
16. methods according to claim 9-15, it is characterized in that, the 2nd RS only takies a subframe in time domain.
17. methods according to claim 9-15, it is characterized in that, one RS comprises K1 RS port, 2nd RS comprises K2 RS port, 3rd RS comprises K3 RS port, described K1, described K2 and described K3 be all be not more than 8 positive integer, the pattern of CSI-RS port in PRBP reused by the pattern of described RS port in PRBP.
18. 1 kinds of subscriber equipmenies, is characterized in that, this equipment comprises:
First module: for sending a CSI, the reference resources of a CSI is a RS
Second module: for sending the 2nd CSI, the reference resources of the 2nd CSI is the 2nd RS
3rd module: for receiving the downstream signal through pre-encode operation
Wherein, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and a RS and the 2nd RS is sent by same community.The pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { at least one during described downstream signal comprises for a CSI, the 2nd CSI} { downlink physical layer data, down physical layer signaling } and descending DMRS.
19. equipment according to claim 18, is characterized in that, the first module also for:
-. the reference resources sending the 3rd CSI, the 3rd CSI is the 3rd RS
Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community, described in report CSI gather also comprise the 3rd CSI.
20. equipment according to claim 18-19, is characterized in that, the second module also for:
-. receive the first signaling and determine L PRBP group, described PRBP group comprises positive integer continuous print PRBP on frequency domain
-. receive the second signaling and determine that 1 target P RBP group in described L PRBP group is the PRBP that the 2nd RS takies, or be the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.
21. 1 kinds of base station equipments, is characterized in that, this equipment comprises:
First module: for receiving a CSI, the reference resources of a CSI is a RS
Second module: for receiving the 2nd CSI, the reference resources of the 2nd CSI is the 2nd RS
3rd module: for sending the downstream signal through pre-encode operation
Wherein, a CSI comprises a PMI, and a RS is broadband; 2nd CSI comprises at least one in the 2nd PMI and the 2nd CQI, and the 2nd RS is arrowband, and a RS and the 2nd RS is sent by same community.The pre-coding matrix of described downstream signal gathers Aided Generation by the transmission base station of described downstream signal according to reporting CSI.The described CSI of reporting set comprises { at least one during described downstream signal comprises for a CSI, the 2nd CSI} { downlink physical layer data, down physical layer signaling } and descending DMRS.
22. equipment according to claim 21, is characterized in that, the first module also for:
-. the reference resources receiving the 3rd CSI, the 3rd CSI is the 3rd RS
Wherein, the 3rd CSI comprises the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by described community, described in report CSI gather also comprise the 3rd CSI.
23. equipment according to claim 21-22, is characterized in that, the second module also for:
-. send the first signaling instruction L PRBP group, described PRBP group comprise positive integer individual on frequency domain continuous print PRBP
-. send the second signaling and indicate 1 target P RBP group in described L PRBP group to be the PRBP that the 2nd RS takies, or be the PRBP that the 2nd RS takies according to 1 target P RBP group that the time-domain position of the 2nd RS is determined in described L PRBP group
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, described L be greater than 1 positive integer.
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|---|---|
| CN110401472A (en) | 2019-11-01 |
| CN105429683B (en) | 2019-08-20 |
| CN110401472B (en) | 2021-03-09 |
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