CN105429683B - A kind of 3D MIMO transmission method and device - Google Patents
A kind of 3D MIMO transmission method and device Download PDFInfo
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- CN105429683B CN105429683B CN201410476200.4A CN201410476200A CN105429683B CN 105429683 B CN105429683 B CN 105429683B CN 201410476200 A CN201410476200 A CN 201410476200A CN 105429683 B CN105429683 B CN 105429683B
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Abstract
The invention proposes a kind of 3D MIMO transmission method and devices.UE sends the first CSI in step 1, and the reference resources of the first CSI are the first RS；The 2nd CSI is sent in step 2, the reference resources of the 2nd CSI are the 2nd RS.Wherein, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI includes at least one of the 2nd PMI and the 2nd CQI, and the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell.The solution of the present invention makes UE estimate the 2nd CSI according to the narrow band detection RS that precoding is sent, and improves the estimated accuracy of the 2nd CSI, while saving measurement RS bring empty overhead.In addition, the present invention reuses existing LTE design as far as possible, the compatibility with existing system is utmostly maintained.
Description
Technical field
The present invention relates to channel state measurement in mobile communication technology field and the schemes of feedback, more particularly to use
FD (Full Dimension, Quan Weidu)-MIMO (Massive Multiple Input Multiple Output, it is big to advise
Mould Multiinputoutput) technology mobile communication system in downlink channel state measurement and feedback scheme.
Background technique
Traditional 3GPP (3rd Generation Partner Project, third generation cooperative partner program) LTE (Long
Term Evolution, long term evolution) in system, CSI (Channel Status Indicator, the letter of downlink mimo channel
Road state instruction) there are mainly two types of modes for feedback
● feed back implicit CSI
UE (User Equipment, user equipment) passes through detection CRS (Cell specific Reference
Signal, the specific reference signal of cell) either CSI-RS (CSI Reference Signal, channel status instruction reference
Signal) it obtains CIR (Channel Impulse Response, channel impulse response) and is mapped as implicit CSI, it is described implicit
CSI includes PTI (Precoding Type Indicator, precoding type instruction), and (Rank Indicator, order refer to RI
Show), CQI (Channel Quality Indicator, channel quality instruction), PMI (Precoding Matrix
Indicator, pre-coding matrix instruction) etc. information.
Attached drawing 1 is in an existing LTE system based on Normal CP (Normal Cyclic Prefix, before normal circulation
Sew) CSI-RS pattern-and meanwhile indicated CRS and DMRS (Demodulation Reference Signal, demodulation reference
Signal), one of lattice is the least resource unit-RE (Resource Element, resource particle) of LTE.Oblique line mark
The RE shown can be used to send CSI-RS (cell at most occupies 8 RE therein), and the RE of cross spider mark can be used to send
The RE of DMRS, overstriking line mark can be used to send CRS.LTE system uses the concept definition RS resource of port: a port RS can
A physical antenna can be mapped to, it is also possible to be more physical antennas by merging a superposition piece virtual antenna of formation.LTE
Define 4 kinds of CSI-RS port numbers: 1,2,4,8, the RE that number is indicated in attached drawing 1 illustrates the figure of one group of port 8CSI-RS
Case example, digital representation port index.
● feedback SRS (Sounding Reference Signal, uplink sounding reference signal)
UE sends uplink SRS, and system side obtains up channel CSI by demodulation SRS, under obtaining further according to link symmetry
Row CSI.This method is primarily adapted for use in TDD (Time Duplex Division, time division duplex) system.FDD(Frequency
Duplex Division, frequency division duplex) system is generally not applicable.
As a kind of new Cellular Networks antenna frame, Massive (extensive) MIMO becomes a research hotspot recently.
The typical feature of Massive mimo system is by increasing the quantity of antenna array unit to biggish value to obtain a system
Column gain, for example, power system capacity theoretically continues to increase with the increase of antenna amount；The coherent superposition of transmitting antenna signal
Reduce transmission power etc..
3GPP R (Release, version) 12 has formulated 3D (Dimension) mimo channel model.In RAN (Radio
Access Network, wireless access network) in #65 meeting, FD-MIMO is approved for the research topic of 3GPP R13.FD-
MIMO most study reaches the scene of 64 physical antennas.
The challenge that FD-MIMO is faced is how to ensure that base station equipment accurately obtains downlink CSI.At present about
The main research of Massive MIMO is based on TDD system, i.e., is that system side obtains downlink CSI using SRS and link symmetry.
In view of SRS limitation (such as FDD is difficult to adopt, the asymmetry of radio frequency link, SRS pilot pollution, and SRS resource is limited,
Cannot indicate CQI etc.), implicit CSI may still play an important role in Massive MIMO transmission.UE needs to detect downlink
RS (Reference Signal, reference signal) is measured to obtain implicit CSI.Due to the physical antenna number in Massive MIMO
It measures larger (traditional CSI-RS port number is not more than 8), downlink measurement RS may occupy the most running time-frequency resource-in subframe
And then it is unable to satisfy the orthogonality between cell.Further, if UE directly feeds back the CSI for all physical antennas, institute
Bring empty overhead is also unacceptable.
In view of the above-mentioned problems, the invention proposes a kind of 3D MIMO transmission method and devices.
Summary of the invention
The invention discloses a kind of methods in UE, wherein includes the following steps:
Step A. sends the first CSI, and the reference resources of the first CSI are the first RS
Step B. sends the 2nd CSI, and the reference resources of the 2nd CSI are the 2nd RS
Wherein, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI includes in the 2nd PMI and the 2nd CQI
At least one, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell.
First RS is that the RE (Resource Element, resource particle) for referring to that the first RS is occupied in broadband is distributed in
In all frequency domain units of the downlink resource of the cell.2nd RS is that the RE for referring to that the 2nd RS is occupied of narrowband is distributed in
In the part frequency domain unit of the downlink resource of the cell.If the cell is FDD cell, the downlink resource is described small
The descending carrier in area；If the cell is TDD cell, the downlink resource is the carrier wave of the cell.Implement as one
Example, the frequency domain unit refer to a port RS of the first RS in an OFDM (Orthogonal Frequency Division
Multiplexing, orthogonal frequency division multiplexing) difference of the center frequency point of two adjacent R E that occupies in symbol.Implement as one
Example, the frequency domain unit are PRBP (Physical Resource Block Pair, Physical Resource Block to).
As one embodiment, the 2nd RS is only present in a frequency domain unit of the downlink resource of the cell.As
One embodiment, all frequencies of the equally spaced downlink resource for being distributed in the cell of RE of the port RS each of the 2nd RS
It takes, the interval is greater than the frequency domain unit.As one embodiment, the 2nd RS is appeared on the downlink resource of the cell
In continuous U frequency domain unit, the U is greater than 1.As one embodiment, the 2nd RS appears in the downlink resource of the cell
In upper U discrete frequency domain unit, the U is greater than 1.
As one embodiment, the UE assumes that the transmission cell of the first RS carries out the condition of precoding using the 2nd PMI
Under calculated 2nd CQI.As one embodiment, the 2nd PMI is narrowband PMI, for the frequency band of the 2nd RS.
As one embodiment, the 2nd RS includes 2 ports RS.2 ports RS can serve to indicate that cross polarised antenna
Two polarization directions.
As one embodiment, the maintenance base station of the cell is the vertical antenna battle array of 8 antennas composition, and the first PMI refers to
Show the relative phase between 8 antennas.
Specifically, according to an aspect of the present invention, which is characterized in that the step A further includes following steps:
Step A1. sends the 3rd CSI, and the reference resources of the 3rd CSI are the 3rd RS
Wherein, the 3rd CSI includes the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by the cell.
As one embodiment, the 2nd PMI and the 3rd PMI are directed to the physical antenna and vertical direction of horizontal direction respectively
Physical antenna.
As one embodiment, the sending cycle and transmission subframe of the 3rd RS are respectively equal to the sending cycle and hair of the 2nd RS
Send subframe.
Specifically, according to an aspect of the present invention, which is characterized in that the step B further includes following steps:
Step B1. receives the first signaling and determines that L PRBP group, the PRBP group include that positive integer is continuous on frequency domain
PRBP
Step B2. receives the second signaling and determines that 1 target PRBP group in the L PRBP group is that the 2nd RS is occupied
PRBP, or determine that 1 target PRBP group in the L PRBP group is that the 2nd RS is occupied according to the time-domain position of the 2nd RS
PRBP
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is greater than 1 positive integer.
The PRBP that the RE that i.e. the 2nd RS of PRBP that 2nd RS is occupied is occupied is distributed.As one embodiment, the L
The center frequency point that a PRBP group occupies is successively increased or is sequentially reduced.As one embodiment, the second signaling is downlink
Dispatch.As one embodiment, the U is 1.As one embodiment, the U is configurable.
As one embodiment, the time-domain position is transmission subframe CSI subframe collection belonging to the 2nd RS of the 2nd RS
Position in conjunction, the UE receive the L in turn in each subframe in the CSI sub-frame set belonging to the 2nd RS
The narrowband RS in a PRBP group in PRBP group.
Specifically, according to an aspect of the present invention, which is characterized in that further include following steps:
Step C. receives the downlink signal Jing Guo pre-encode operation
Wherein, the pre-coding matrix of the downlink signal is by the transmission base station of the downlink signal according to reporting CSI to gather
Auxiliary generates.It is described that CSI set is reported to include { the first CSI, the 2nd CSI }, or { the first CSI, the 2nd CSI, the 3rd CSI }.
The downlink signal includes at least one of { downlink physical layer data, down physical layer signaling } and downlink DMRS.
It is described that CSI set is reported to include the 3rd CSI as long as the 3rd CSI exists as one embodiment.
As one embodiment, the physical layer data is in PDSCH (Physical Downlink Shared
Channel, Physical Downlink Shared Channel) on transmit.As one embodiment, the down physical layer signaling is in EPDCCH
It is transmitted on (Enhanced Physical Downlink Control Channel, the Physical Downlink Control Channel of enhancing).
Specifically, according to an aspect of the present invention, which is characterized in that in the 2nd occupied PRBP of RS, the UE
It is configured to monitor P RS port set, the 2nd RS is 1 target RS port set in the P RS port set, the RS port set
Including 1 or 2 ports RS, the 2nd CSI indicates index of the target RS port set in the P RS port set, institute
Stating P is positive integer.
As one embodiment, the port the RS sum in the P RS port set is not more than 8, that is, is no more than CSI-RS most
Large port number, not will increase inter-cell interference.
Specifically, according to an aspect of the present invention, which is characterized in that the first CSI further includes sub-band index, the son
Band index indicates the part frequency domain unit of the downlink resource of the cell.The sub-band index indicates the use that the UE recommends
In the frequency band of descending scheduling.
Specifically, according to an aspect of the present invention, which is characterized in that the 2nd RS only takes up a subframe in the time domain.
As one embodiment, the subframe that the sub-frame set and the 2nd RS that the first RS is occupied occupy is orthogonal.
Specifically, according to an aspect of the present invention, which is characterized in that the first RS includes the K1 port RS, the 2nd RS packet
The K2 port RS is included, the 3rd RS includes the K3 port RS, and the K1, the K2 and the K3 are no more than 8 positive integer, institute
It states pattern of the port RS in PRBP and reuses pattern of the port CSI-RS in PRBP.
The port RS is sent by 1 or multiple physical antennas.
The invention discloses a kind of methods in base station, wherein includes the following steps:
Step A. receives the first CSI, and the reference resources of the first CSI are the first RS
Step B. receives the 2nd CSI, and the reference resources of the 2nd CSI are the 2nd RS
Wherein, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI includes in the 2nd PMI and the 2nd CQI
At least one, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell.
The cell is maintained by the base station.
Specifically, according to an aspect of the present invention, which is characterized in that the step A further includes following steps:
Step A1. receives the 3rd CSI, and the reference resources of the 3rd CSI are the 3rd RS
Wherein, the 3rd CSI includes the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by the cell.
Specifically, according to an aspect of the present invention, which is characterized in that the step B further includes following steps:
Step B1. sends the first signaling and indicates that L PRBP group, the PRBP group include that positive integer is continuous on frequency domain
PRBP
Step B2. sends the second signaling and indicates that 1 target PRBP group in the L PRBP group is that the 2nd RS is occupied
PRBP, or determine that 1 target PRBP group in the L PRBP group is that the 2nd RS is occupied according to the time-domain position of the 2nd RS
PRBP
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is greater than 1 positive integer.
Specifically, according to an aspect of the present invention, which is characterized in that further include following steps:
Step C. sends the downlink signal Jing Guo pre-encode operation
Wherein, the pre-coding matrix of the downlink signal is by the transmission base station of the downlink signal according to reporting CSI to gather
Auxiliary generates.It is described that CSI set is reported to include { the first CSI, the 2nd CSI }, or { the first CSI, the 2nd CSI, the 3rd CSI }.
The downlink signal includes at least one of { downlink physical layer data, down physical layer signaling } and downlink DMRS.
Specifically, according to an aspect of the present invention, which is characterized in that the RS signal of the port RS each of the 2nd RS
Sent by the way of precoding by K4 physical antenna, corresponding precoding vector is V, and the K4 is positive integer, the V by
First PMI auxiliary determines.
Specifically, according to an aspect of the present invention, which is characterized in that in the 2nd occupied PRBP of RS, the UE
It is configured to monitor P RS port set, the 2nd RS is 1 target RS port set in the P RS port set, the RS port set
Including 1 or 2 ports RS, the 2nd CSI indicates index of the target RS port set in the P RS port set, institute
Stating P is positive integer.
Specifically, according to an aspect of the present invention, which is characterized in that the first CSI further includes sub-band index, the son
Band index indicates the part frequency domain unit of the downlink resource of the cell.The base station determines according to the sub-band index and uses
In the candidate band for sending UE and carrying out downlink transfer for dispatching the first CSI.
If the cell is FDD cell, the downlink resource is the descending carrier of the cell；If the cell is
TDD cell, the downlink resource are the carrier waves of the cell.
Specifically, according to an aspect of the present invention, which is characterized in that the 2nd RS only takes up a subframe in the time domain.
Specifically, according to an aspect of the present invention, which is characterized in that the first RS includes the K1 port RS, the 2nd RS packet
The K2 port RS is included, the 3rd RS includes the K3 port RS, and the K1, the K2 and the K3 are no more than 8 positive integer, institute
It states pattern of the port RS in PRBP and reuses pattern of the port CSI-RS in PRBP.
The invention discloses a kind of user equipmenies, which is characterized in that the equipment includes:
First module: for sending the first CSI, the reference resources of the first CSI are the first RS
Second module: for sending the 2nd CSI, the reference resources of the 2nd CSI are the 2nd RS
Third module: for receiving the downlink signal Jing Guo pre-encode operation
Wherein, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI includes in the 2nd PMI and the 2nd CQI
At least one, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell.The precoding of the downlink signal
Matrix by the downlink signal transmission base station according to report CSI set auxiliary generate.It is described that CSI set is reported to include { first
CSI, the 2nd CSI }, the downlink signal include at least one of { downlink physical layer data, down physical layer signaling } and
Downlink DMRS.
As one embodiment, above equipment is characterized in that, the first module is also used to:
- sends the 3rd CSI, and the reference resources of the 3rd CSI are the 3rd RS
Wherein, the 3rd CSI include the 3rd PMI, the 3rd RS is broadband, and the 3rd RS is also sent by the cell, it is described on
Reporting CSI set further includes the 3rd CSI.
As one embodiment, above equipment is characterized in that, the second module is also used to:
- receives the first signaling and determines that L PRBP group, the PRBP group include positive integer PRBP continuous on frequency domain
- receives the second signaling and determines that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied, or
Person determines that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied according to the time-domain position of the 2nd RS
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is greater than 1 positive integer.
The invention discloses a kind of base station equipments, which is characterized in that the equipment includes:
First module: for receiving the first CSI, the reference resources of the first CSI are the first RS
Second module: for receiving the 2nd CSI, the reference resources of the 2nd CSI are the 2nd RS
Third module: for sending the downlink signal Jing Guo pre-encode operation
Wherein, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI includes in the 2nd PMI and the 2nd CQI
At least one, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell.The precoding of the downlink signal
Matrix by the downlink signal transmission base station according to report CSI set auxiliary generate.It is described that CSI set is reported to include { first
CSI, the 2nd CSI }, the downlink signal include at least one of { downlink physical layer data, down physical layer signaling } and
Downlink DMRS.
As one embodiment, above equipment is characterized in that, the first module is also used to:
- receives the 3rd CSI, and the reference resources of the 3rd CSI are the 3rd RS
Wherein, the 3rd CSI include the 3rd PMI, the 3rd RS is broadband, and the 3rd RS is also sent by the cell, it is described on
Reporting CSI set further includes the 3rd CSI.
As one embodiment, above equipment is characterized in that, the second module is also used to:
- sends the first signaling and indicates that L PRBP group, the PRBP group include positive integer PRBP continuous on frequency domain
- sends the second signaling and indicates that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied, or
Person determines that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied according to the time-domain position of the 2nd RS
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is greater than 1 positive integer.
This problem of excessive interface-free resources is occupied for the CSI for measuring RS in Massive mimo system and reporting,
Of the invention to propose a kind of classification measurement and feedback scheme, UE determines the first CSI according to wide-band width measurement RS, according to narrow band detection
RS determines the 2nd CSI.Base station determines down channel according to the first CSI and the 2nd CSI jointly.It is described narrow as one embodiment
Band measurement RS is sent using the specific precoding mode of UE, and corresponding pre-coding matrix is assisted by the base station according to the first CSI
It determines.The narrow band detection RS that precoding is sent has the preferable quality of reception in the side UE, improves the estimated accuracy of the 2nd CSI, together
When save measurement RS bring empty overhead.In addition, the present invention reuses existing LTE design as far as possible, utmostly maintain
With the compatibility of existing system.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, of the invention other
Feature, objects and advantages will become more apparent:
Fig. 1 shows the schematic diagram of the downlink RS pattern of existing LTE system；
Fig. 2 shows CSI feedback flow charts according to an embodiment of the invention；
Fig. 3 shows the time-domain position schematic diagram of the first RS and the 2nd RS according to an embodiment of the invention；
Fig. 4 shows the time-frequency location schematic diagram of the 2nd RS according to an embodiment of the invention；
Fig. 5 shows the 4X4 cross polarised antenna battle array of base station side according to an embodiment of the invention to the port RS
Mapping graph；
Fig. 6 shows the 4X8 vertical polarized antenna battle array of base station side according to an embodiment of the invention to the port RS
Mapping graph；
Fig. 7 shows the structural block diagram according to an embodiment of the invention for the processing unit in UE；
Fig. 8 shows the structural block diagram according to an embodiment of the invention for the processing unit in base station；
Specific embodiment
Technical solution of the present invention is described in further detail below in conjunction with attached drawing, it should be noted that do not rushing
In the case where prominent, the feature in embodiments herein and embodiment can be arbitrarily combined with each other.
Embodiment 1
Embodiment 1 is CSI feedback flow chart, as shown in Fig. 2.In attached drawing 2, base station N1 is the serving BS of UE U2.Side
The step of identifying in frame F1 is optional step.
For UE U2, in the step s 21, the first CSI is sent；In the step s 21, the 2nd CSI is sent；In step S23
In, receive the downlink signal Jing Guo pre-encode operation.
For base station N1, in step s 11, the first CSI is received；In step s 12, the 2nd CSI is received；In step S13
In, send the downlink signal Jing Guo pre-encode operation.
In embodiment 1, the reference resources of the first CSI are the first RS, and the first CSI includes the first PMI, and the first RS is broadband
's；The reference resources of 2nd CSI are the 2nd RS, and the 2nd CSI includes at least one of the 2nd PMI and the 2nd CQI, and the 2nd RS is
Narrowband.First RS and the 2nd RS are sent by the same cell, and the cell is maintained by base station N1.The downlink signal prelists
Code matrix by the downlink signal transmission base station according to report CSI set auxiliary generation.It is described that report CSI set include { the
One CSI, the 2nd CSI }.The downlink signal include at least one of { downlink physical layer data, down physical layer signaling } with
And downlink DMRS.
As the sub- embodiment 1 of embodiment 1, UE U2 sends the 3rd CSI, the reference money of the 3rd CSI in step S210
Source is the 3rd RS.Wherein, the 3rd CSI includes the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by the cell.It is described
Reporting CSI set includes the 3rd CSI.
As the sub- embodiment 2 of embodiment 1, the first CSI further includes sub-band index, described in the sub-band index instruction
The part frequency domain unit of the downlink resource of cell.UE has preferable reception matter on the corresponding frequency band of the sub-band index
Amount.Base station N1 is according to the transmission band of the 2nd RS of sub-band index assisted Selection.
As the sub- embodiment 3 of embodiment 1, in the 2nd occupied PRBP of RS, base station N1 configures UE and monitors the P end RS
Mouth group, the 2nd RS are 1 target RS port sets in the P RS port set, and the RS port set includes 1 or 2 RS
Port, the 2nd CSI indicate that index of the target RS port set in the P RS port set, the P are positive integers.It is described
Pattern of the port RS in PRBP reuses the pattern of the port CSI-RS.
Embodiment 2
Embodiment 2 is the time-domain position schematic diagram of the first RS and the 2nd RS, as shown in Fig. 3.In attached drawing 3, oblique line mark
Grid be subframe in CSI sub-frame set belonging to the first RS, the grid of bold box mark is CSI subframe belonging to the 2nd RS
Subframe in set.
CSI sub-frame set belonging to first RS is the first CSI sub-frame set (the grid composition of oblique line mark), the 2nd RS institute
The CSI sub-frame set of category is the 2nd CSI sub-frame set (the grid composition of bold box mark).First CSI sub-frame set and second
CSI sub-frame set is configured by high-level signaling.
As a sub- embodiment of embodiment 2, the first RS is sent in all subframes in the first CSI sub-frame set,
2nd RS is only sent in 1 subframe of the 2nd CSI sub-frame set.
The essence of above-mentioned sub- embodiment is: UE can be carried out using the RS in multiple subframes in the first CSI sub-frame set
Channel estimation obtains the first PMI, and can only carry out channel estimation using the RS in 1 subframe in the 2nd CSI sub-frame set and obtain
Obtain the 2nd PMI.In view of the RS in the 2nd CSI sub-frame set is that RS by precoding processing, in 1 subframe can be obtained
Preferable precision of channel estimation.Since the narrowband RS in the 2nd CSI sub-frame set in a subframe can be answered by multiple UE frequency divisions
With, above-mentioned sub- embodiment can save significantly on the expense of downlink measurement RS,
Embodiment 3
Embodiment 3 is the time-frequency location schematic diagram of the 2nd RS, as shown in Fig. 4.In attached drawing 4, the grid of oblique line mark is
PRBP group, the grid of bold box mark are the PRBP groups that the 2nd RS is occupied.
Base station sends the first signaling first and indicates L PRBP group；Then the L are determined according to the time-domain position of the 2nd RS
1 target PRBP group in PRBP group is the PRBP that the 2nd RS is occupied.
UE receives the first signaling first and determines L PRBP group；Then the L are determined according to the time-domain position of the 2nd RS
1 target PRBP group in PRBP group is the PRBP that the 2nd RS is occupied.
In embodiment 3, the first signaling is high-level signaling, and the L is greater than 1 positive integer.The PRBP group includes just whole
Several PRBP continuous on frequency domain.First RS and the 2nd RS are all located on first carrier.The L PRBP group is in first carrier
On frequency domain position respectively as shown in P_1, P_2 ..., the P_L in attached drawing 4.UE CSI subframe collection belonging to the 2nd RS
It closes (SF_1, SF_2 ...) and receives narrowband RS in a PRBP group in the L PRBP group, therefore the UE energy in turn
The frequency domain position of the 2nd RS is determined according to the time-domain position (i.e. SF_2).
As the sub- embodiment 1 of embodiment 3, the quantity of included PRB is in each PRBP group of the L PRBP group
It is independent.
As the sub- embodiment 2 of embodiment 3, the quantity of included PRB is in each PRBP group of the L PRBP group
It is identical.
Embodiment 4
Embodiment 4 is the 4X4 cross polarised antenna battle array of base station side to the mapping graph of the port RS, as shown in Fig. 5.Attached drawing 5
In, a lattice indicates a physical antenna, the corresponding RS port index of the digital representation therein physical antenna.
As shown in Fig. 5, it is mapped to by the way of precoding together with 4 transmission antennas of first polarization direction of a line
One port RS (the RS sequence that i.e. described 4 transmission antennas send the same port RS forms a virtual-antenna).Similar,
4 transmission antennas of the second polarization direction of same row are mapped to the same port RS by the way of precoding.
In embodiment 4, the first RS includes the port RS { 1,2,3,4 }, and the 3rd RS includes the port RS { 5,6,7,8 }.First CSI
Including 4 row b1The first of column3rd CSI includes 4 row b3The third of columnb1And b3?
It is no more than 4 positive integer.WithKronecker product (Kronecker Product) operation obtains 2 dimension array antennas
Pre-coding matrix
As the sub- embodiment 1 of embodiment 4,16 antennas of the first polarization direction are usedFirst rowPrecoding forms the port RS { 9 }, and 16 antennas of the second polarization direction useFirst rowPrecoding forms the port RS { 10 }.2nd RS includes the port RS { 9,10 }, and UE carries out channel according to the 2nd RS
Estimation obtains the 2nd CSI, and the 2nd CSI includes the 2nd PMI to the relative phase between two polarization directions.
As the sub- embodiment 2 of embodiment 4,16 antennas of the first polarization direction are usedPrecoding forms RS
Port { 9 ..., 8+b1b3, 16 antennas of the second polarization direction usePrecoding forms the port RS { 9+
b1b3..., 8+2b1b3}.Further, b is formed1b3A RS port set, each RS port set include 2 ports RS, it may be assumed that { 9,9
+b1b3, { 10,10+b1b3..., { 8+b1b3, 8+2b1b3}。
UE is from the b1b3The preferable target RS port set of the quality of reception, the 2nd RS packet are selected in a RS port set
Include the port RS in the target RS port set.Further, UE carries out channel estimation according to the 2nd RS and obtains the 2nd PMI.UE
Feed back the index of the 2nd PMI and the target RS port set.
Embodiment 5
Embodiment 5 is the 4X8 vertical polarized antenna battle array of base station side to the mapping graph of the port RS, as shown in Fig. 6.Attached drawing 6
In, a lattice indicates a physical antenna, the corresponding RS port index of the digital representation therein physical antenna.
As shown in Fig. 6,4 transmission antennas of same row are mapped to the same port the RS-RS by the way of precoding
Port { 1-8 }.Similar, 4 transmission antennas with a line are mapped to the same port the RS port-RS by the way of precoding
{9-12}。
In embodiment 5, the generating mode of the 2nd RS is similar with the antenna array of a polarization direction in embodiment 4 (to be implemented
Antenna array in example 5 only has a polarization direction).
Do not include the 2nd PMI in the 2nd CSI due to only having a polarization direction in embodiment 5, includes the in the 2nd CSI
Two CQI.
Embodiment 6
Embodiment 6 is the structural block diagram for the processing unit in UE, as shown in Fig. 7.In attached drawing 7, processing unit 300
By processing module 301, processing module 302 and receiving module 303 are formed.
For processing module 301 for sending the first CSI, the reference resources of the first CSI are the first RS；Processing module 302 is used for
The 2nd CSI is sent, the reference resources of the 2nd CSI are the 2nd RS；Receiving module 303 is used to receive the downlink Jing Guo pre-encode operation
Signal.
In embodiment 6, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI includes the 2nd PMI and second
CQI, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell.The pre-coding matrix of the downlink signal by
The transmission base station of the downlink signal according to report CSI set auxiliary generate.It is described report CSI set include the first CSI, the
Two CSI }, the downlink signal includes { downlink physical layer data, down physical layer signaling } and downlink DMRS.
As the sub- embodiment 1 of embodiment 6, processing module 301 is also used to send the 3rd CSI, the reference resources of the 3rd CSI
It is the 3rd RS.Wherein, the 3rd CSI include the 3rd PMI, the 3rd RS is broadband, and the 3rd RS is also sent by the cell, it is described on
Reporting CSI set further includes the 3rd CSI.
As the sub- embodiment 2 of embodiment 6, processing module 302 is also used to:
- receives the first signaling and determines that L PRBP group, the PRBP group include positive integer PRBP continuous on frequency domain
- receives the second signaling and determines that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied, or
Person determines that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied according to the time-domain position of the 2nd RS.
In the sub- embodiment 2 of embodiment 6, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is
Positive integer greater than 1.It include U PRBP in the PRBP group, the U is positive integer, and the U is that constant is either configurable
's.
Embodiment 7
Embodiment 7 is the structural block diagram for the processing unit in base station, as shown in Fig. 8.In attached drawing 8, processing unit
400 are made of processing module 401, processing module 402 and sending module 403.
For processing module 401 for receiving the first CSI, the reference resources of the first CSI are the first RS；Processing module 402 is used for
The 2nd CSI is received, the reference resources of the 2nd CSI are the 2nd RS；Sending module 403 is used to send the downlink Jing Guo pre-encode operation
Signal.
In embodiment 7, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI includes the 2nd PMI and second
At least one of CQI, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell that the base station maintains.
The pre-coding matrix of the downlink signal by the downlink signal transmission base station according to report CSI set auxiliary generate.It is described
Reporting CSI set includes { the first CSI, the 2nd CSI }, and the downlink signal includes downlink physical layer data and downlink DMRS.
As the sub- embodiment 1 of embodiment 7, processing module 401 is also used to receive the 3rd CSI, the reference resources of the 3rd CSI
It is the 3rd RS.Wherein, the 3rd CSI include the 3rd PMI, the 3rd RS is broadband, and the 3rd RS is also sent by the cell, it is described on
Reporting CSI set further includes the 3rd CSI.
As the sub- embodiment 2 of embodiment 7, processing module 402 is also used to:
- sends the first signaling and indicates that L PRBP group, the PRBP group include positive integer PRBP continuous on frequency domain
- sends the second signaling and indicates that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied, or
Person determines that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied according to the time-domain position of the 2nd RS
In the sub- embodiment 2 of embodiment 7, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is
Positive integer greater than 1.It include U PRBP in the PRBP group, the U is positive integer, and the U is that constant is either configurable
's.
Those of ordinary skill in the art will appreciate that all or part of the steps in the above method can be referred to by program
Related hardware is enabled to complete, described program can store in computer readable storage medium, such as read-only memory, hard disk or light
Disk etc..Optionally, one or more integrated circuit can be used also to realize in all or part of the steps of above-described embodiment.Phase
It answers, each modular unit in above-described embodiment, can be realized using example, in hardware, it can also be by the form of software function module
It realizes, the application is not limited to the combination of the software and hardware of any particular form.
The foregoing is only a preferred embodiment of the present invention, is not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification made, equivalent replacement, improve etc., it should be included in protection of the invention
Within the scope of.
Claims (22)
1. a kind of method in UE, wherein include the following steps:
Step A. sends the first CSI, and the reference resources of the first CSI are the first RS；
Step B. sends the 2nd CSI, and the reference resources of the 2nd CSI are the 2nd RS；
Wherein, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI include in the 2nd PMI and the 2nd CQI extremely
One few, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell；The port RS each of 2nd RS
RS signal is sent by the way of precoding by K4 physical antenna, and corresponding precoding vector is V, and the K4 is positive integer,
The V is assisted determining by the first PMI.
2. the method according to claim 1, wherein the step A further includes following steps:
Step A1. sends the 3rd CSI, and the reference resources of the 3rd CSI are the 3rd RS；
Wherein, the 3rd CSI includes the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by the cell.
3. the method according to claim 1, wherein the step B further includes following steps:
Step B1. receives the first signaling and determines that L PRBP group, the PRBP group include that positive integer is continuous on frequency domain
PRBP；
Step B2. receives the second signaling and determines that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied,
Or determine that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied according to the time-domain position of the 2nd RS；
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is greater than 1 positive integer.
4. according to the method described in claim 2, it is characterized in that, further including following steps:
Step C. receives the downlink signal Jing Guo pre-encode operation；
Wherein, the pre-coding matrix of the downlink signal by the downlink signal transmission base station according to report CSI set auxiliary
It generates；It is described that CSI set is reported to include { the first CSI, the 2nd CSI }, or { the first CSI, the 2nd CSI, the 3rd CSI }；It is described
Downlink signal includes at least one of { downlink physical layer data, down physical layer signaling } and downlink DMRS.
5. the method according to claim 1, wherein the UE is configured in the 2nd occupied PRBP of RS
P RS port set is monitored, the 2nd RS is 1 target RS port set in the P RS port set, and the RS port set includes 1
A or 2 ports RS, the 2nd CSI indicate that index of the target RS port set in the P RS port set, the P are
Positive integer.
6. the method according to claim 1, which is characterized in that the first CSI further includes sub-band
Index, the sub-band index indicate the part frequency domain unit of the downlink resource of the cell.
7. the method according to claim 1, which is characterized in that the 2nd RS is only accounted in the time domain
With a subframe.
8. method according to claim 2 or 4, which is characterized in that the first RS includes the K1 port RS, and the 2nd RS includes K2
A port RS, the 3rd RS include the K3 port RS, and the K1, the K2 and the K3 are no more than 8 positive integer, the RS
Pattern of the port in PRBP reuses pattern of the port CSI-RS in PRBP.
9. a kind of method in base station, wherein include the following steps:
Step A. receives the first CSI, and the reference resources of the first CSI are the first RS；
Step B. receives the 2nd CSI, and the reference resources of the 2nd CSI are the 2nd RS；
Wherein, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI include in the 2nd PMI and the 2nd CQI extremely
One few, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell；The port RS each of 2nd RS
RS signal is sent by the way of precoding by K4 physical antenna, and corresponding precoding vector is V, and the K4 is positive integer,
The V is assisted determining by the first PMI.
10. according to the method described in claim 9, it is characterized in that, the step A further includes following steps:
Step A1. receives the 3rd CSI, and the reference resources of the 3rd CSI are the 3rd RS；
Wherein, the 3rd CSI includes the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by the cell.
11. according to the method described in claim 9, it is characterized in that, the step B further includes following steps:
Step B1. sends the first signaling and indicates that L PRBP group, the PRBP group include that positive integer is continuous on frequency domain
PRBP；
Step B2. sends the second signaling and indicates that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied,
Or determine that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied according to the time-domain position of the 2nd RS；
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is greater than 1 positive integer.
12. according to the method described in claim 10, it is characterized in that, further including following steps:
Step C. sends the downlink signal Jing Guo pre-encode operation；
Wherein, the pre-coding matrix of the downlink signal by the downlink signal transmission base station according to report CSI set auxiliary
It generates；It is described that CSI set is reported to include { the first CSI, the 2nd CSI }, or { the first CSI, the 2nd CSI, the 3rd CSI }；It is described
Downlink signal includes at least one of { downlink physical layer data, down physical layer signaling } and downlink DMRS.
13. according to the method described in claim 9, it is characterized in that, the UE is configured in the 2nd occupied PRBP of RS
P RS port set is monitored, the 2nd RS is 1 target RS port set in the P RS port set, and the RS port set includes 1
A or 2 ports RS, the 2nd CSI indicate that index of the target RS port set in the P RS port set, the P are
Positive integer.
14. according to the method described in claim 9, it is characterized in that, the first CSI further includes sub-band index, the sub-band
Index indicates the part frequency domain unit of the downlink resource of the cell.
15. the method according to any claim in claim 9 to 14, which is characterized in that the 2nd RS is in the time domain only
Occupy a subframe.
16. method described in 0 or 12 according to claim 1, which is characterized in that the first RS includes the K1 port RS, the 2nd RS packet
The K2 port RS is included, the 3rd RS includes the K3 port RS, and the K1, the K2 and the K3 are no more than 8 positive integer, institute
It states pattern of the port RS in PRBP and reuses pattern of the port CSI-RS in PRBP.
17. a kind of user equipment, which is characterized in that the equipment includes:
First module: for sending the first CSI, the reference resources of the first CSI are the first RS；
Second module: for sending the 2nd CSI, the reference resources of the 2nd CSI are the 2nd RS；
Third module: for receiving the downlink signal Jing Guo pre-encode operation；
Wherein, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI include in the 2nd PMI and the 2nd CQI extremely
One few, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell；The pre-coding matrix of the downlink signal
By the downlink signal transmission base station according to report CSI set auxiliary generate；It is described report CSI set include the first CSI,
2nd CSI }, the downlink signal includes at least one of { downlink physical layer data, down physical layer signaling } and downlink
DMRS；The RS signal of the port RS each of 2nd RS is sent by the way of precoding by K4 physical antenna, corresponding
Precoding vector is V, and the K4 is positive integer, and the V is assisted determining by the first PMI.
18. equipment according to claim 17, which is characterized in that the first module is also used to:
- sends the 3rd CSI, and the reference resources of the 3rd CSI are the 3rd RS；
Wherein, the 3rd CSI includes the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by the cell, described to report CSI
Set further includes the 3rd CSI.
19. equipment described in 7 or 18 according to claim 1, which is characterized in that the second module is also used to:
- receives the first signaling and determines that L PRBP group, the PRBP group include positive integer PRBP continuous on frequency domain；
- receives the second signaling and determines that 1 target PRBP group in the L PRBP group is the PRBP, Huo Zhegen that the 2nd RS is occupied
Determine that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied according to the time-domain position of the 2nd RS；
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is greater than 1 positive integer.
20. a kind of base station equipment, which is characterized in that the equipment includes:
First module: for receiving the first CSI, the reference resources of the first CSI are the first RS；
Second module: for receiving the 2nd CSI, the reference resources of the 2nd CSI are the 2nd RS；
Third module: for sending the downlink signal Jing Guo pre-encode operation；
Wherein, the first CSI includes the first PMI, and the first RS is broadband；2nd CSI include in the 2nd PMI and the 2nd CQI extremely
One few, the 2nd RS is narrowband, and the first RS and the 2nd RS are sent by the same cell；The pre-coding matrix of the downlink signal
By the downlink signal transmission base station according to report CSI set auxiliary generate；It is described report CSI set include the first CSI,
2nd CSI }, the downlink signal includes at least one of { downlink physical layer data, down physical layer signaling } and downlink
DMRS；The RS signal of the port RS each of 2nd RS is sent by the way of precoding by K4 physical antenna, corresponding
Precoding vector is V, and the K4 is positive integer, and the V is assisted determining by the first PMI.
21. equipment according to claim 20, which is characterized in that the first module is also used to:
- receives the 3rd CSI, and the reference resources of the 3rd CSI are the 3rd RS；
Wherein, the 3rd CSI includes the 3rd PMI, and the 3rd RS is broadband, and the 3rd RS is also sent by the cell, described to report CSI
Set further includes the 3rd CSI.
22. the equipment according to claim 20 or 21, which is characterized in that the second module is also used to:
- sends the first signaling and indicates that L PRBP group, the PRBP group include positive integer PRBP continuous on frequency domain；
- sends the second signaling and indicates that 1 target PRBP group in the L PRBP group is the PRBP, Huo Zhegen that the 2nd RS is occupied
Determine that 1 target PRBP group in the L PRBP group is the PRBP that the 2nd RS is occupied according to the time-domain position of the 2nd RS；
Wherein, the first signaling is high-level signaling, and the second signaling is physical layer signaling, and the L is greater than 1 positive integer.
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| CN201410476200.4A CN105429683B (en) | 2014-09-17 | 2014-09-17 | A kind of 3D MIMO transmission method and device |
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