CN106559181A - For the method for configurating channel state information reference signals - Google Patents
For the method for configurating channel state information reference signals Download PDFInfo
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- CN106559181A CN106559181A CN201510617756.5A CN201510617756A CN106559181A CN 106559181 A CN106559181 A CN 106559181A CN 201510617756 A CN201510617756 A CN 201510617756A CN 106559181 A CN106559181 A CN 106559181A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
- H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space diversity
- H04L1/0618—Space-time coding
- H04L1/0675—Space-time coding characterised by the signaling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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Abstract
The present invention relates to a kind of method for configurating channel state information reference signals in a base station, the method is comprised the following steps：A. at least three Equations of The Second Kind channel state information reference signals configurations for supporting 12 ports or 16 ports are generated；B. Equations of The Second Kind channel state information reference signals configuration is distributed to and is under the jurisdiction of at least one of three adjacent cells of the base station.Can be energy so as to improve 3D mimo systems by constructing the CSI RS for supporting 12 and 16 ports configurations with reference to existing CSI RS configurations according to the method for the present invention.Additionally, configuration saltus step can reduce the probability of happening of resource contention.Furthermore, present invention also offers the CSI RS transmission of the support 12 in DwPTS frames and 16 ports for TDD system.
Description
Technical field
The present invention relates to wireless communication field, in particular it relates to a kind of be used for configurating channel state
The method of information reference signal.
Background technology
In nearest 3GPP meetings, 3D multiple-input, multiple-output (MIMO) channel model is adopted,
Meanwhile, it is corresponding for gain being obtained from 3D multi-input and multi-output channels also to study and propose
Scheme.
In RAN#68, beam forming/full dimension (EBF/FD)-multiple-input, multiple-output work is lifted
Group is explicitly pointed out, using the 2D antennas of the cross-pole with base station on height and direction
Array is determined to be improvement.The working group is intended to the channel for including non-precoded and beam forming
State information reference signals (CSI-RS：channel state information-reference signal)
Enhancing.Particularly with the CSI-RS of non-precoded, extended using full port mapping existing
Quantity be 1,2,4 or 8 CSI-RS antenna ports, to support 12 and 16 ports
CSI-RS。
Fig. 1 shows 8 port of support in the case of conventional cyclic prefix according to prior art
Channel state information reference signals configuration figure.As shown in figure 1,40 resource elements are divided
CSI-RS for 58 ports of support is configured, and CSI-RS density is 1RE/RB/Port.
It is not provided with supporting the CSI-RS allocation plans of 16 ports in prior art.
Meanwhile, in current CSI-RS allocation plans, it is superimposed orthogonal code (OCC：orthogonal
Cover code) length share same CSI-RS positions for 2, i.e. each two port.And
In current standard, maximum power strengthens (power boosting) and is limited in 6dB,
This for support 8 ports CSI-RS transmission be can completely use resource block pair power
's.However, in the CSI-RS transmission for supporting 16 and 12 ports, length is 2 OCC
Power enhancing with 6dB is cannot completely using the power of resource block pair.
Additionally, under not supporting in existing standard under time division duplex (TDD) pattern
Any CSI-RS transmission in row pilot time slot (DwPTS) frame.
The content of the invention
In order to provide the CSI-RS allocation plans for supporting 12 ports or 16 ports, and to the greatest extent may be used
Energy ground reduces the probability of resource contention, and in order to support 12 end of support in a tdd system
Mouth or the CSI-RS transmission of 16 ports, it is necessary to propose a kind of supporting for arranging for optimization
The method of the CSI-RS configurations of 12 ports or 16 ports.
In order to realize the purpose of the present invention, a first aspect of the present invention provides one kind in base
In standing, the method for configurating channel state information reference signals, the method comprising the steps of：
A. at least three Equations of The Second Kind channel condition information references for supporting 12 ports or 16 ports are generated
Signal is configured；And Equations of The Second Kind channel state information reference signals configuration is distributed to by B.
It is under the jurisdiction of at least one of three adjacent cells of the base station.
By said method, enabling in a base station formed at least three support 12 ports or
The Equations of The Second Kind channel state information reference signals configuration of 16 ports.At least three Equations of The Second Kind channel
State information reference signals are configured and can be used in three neighbouring cells for being under the jurisdiction of the base station
Configuration, so as to be conducive to improving performance gain.
In a kind of embodiment according to the method for the present invention, step A includes：In list
Individual resource block pair is by multiple first kind channel status for supporting 2 ports or 4 ports or 8 ports
The configuration of information reference signal combines, to generate Equations of The Second Kind channel condition information described at least three
Reference signal configuration.In this way, can realize to Equations of The Second Kind in single Resource Block
The support of CSI-RS configurations.
In a kind of embodiment according to the method for the present invention, step A includes：In list
Multiple resource block pairs of individual subframe support the first of 2 ports or 4 ports or 8 ports by multiple
The configuration of class channel state information reference signals combines, to generate Equations of The Second Kind letter described at least three
Channel state information reference signal configuration.In this way caused by impact to certainty of measurement
It is acceptable.Meanwhile, in the case that the CSI-RS in reference to two Resource Block is configured,
5 under general cyclic prefix pattern nonoverlapping CSI-RS configurations can be provided or expanded
4 nonoverlapping CSI-RS configurations under exhibition cyclic prefix mode, this can simplify minizone
CSI-RS is configured.
In a kind of embodiment according to the method for the present invention, generate in 3 resource block pairs
The channel state information reference signals configuration of 10 12 ports of support.In this way, make
Must configure even closer, resource can be maximally utilised.
In a kind of embodiment according to the method for the present invention, step A includes：Many
By multiple first kind channel condition informations for supporting 2 ports or 4 ports or 8 ports in individual subframe
Reference signal configuration combines, to generate Equations of The Second Kind channel condition information reference described at least three
Signal is configured.In this way caused by impact to certainty of measurement be acceptable.Together
When, which can simplify the CSI-RS configurations of minizone.
In a kind of embodiment according to the method for the present invention, 10 are generated in 3 subframes
The individual channel state information reference signals configuration for supporting 12 ports.In this way, also can
It is enough to cause configuration even closer, and maximally utilise resource.
In a kind of embodiment according to the method for the present invention, step B includes following son
Any one of step：B1. Equations of The Second Kind channel state information reference signals configuration is distributed
To three adjacent cells；B2. by the Equations of The Second Kind channel state information reference signals and support
The first kind channel state information reference signals of 2 ports or 4 ports or 8 ports distribute to three
Adjacent cell.In this way, can not only provide and support 12 ports or 16 ports
Equations of The Second Kind CSI-RS is configured, and being capable of backward compatible traditional only support first kind CSI-RS
The cell of configuration.
In a kind of embodiment according to the method for the present invention, if distributing to adjacent cell
Channel state information reference signals configuration with overlap resource element, then to the channel shape
The configuration of state information reference signal carries out saltus step.In this way, the saltus step for configuring can be passed through
Come randomization due to overlap CSI-RS and caused resource contention, so as to improve channel
The precision of measurement.
In a kind of embodiment according to the method for the present invention so that distribute to adjacent cell
Channel state information reference signals be configured in different subframes in carry out saltus step.
In a kind of embodiment according to the method for the present invention so that distribute to adjacent cell
Channel state information reference signals be configured in the different Resource Block of single subframe in jumped
Become.
In a kind of embodiment according to the method for the present invention, the scheme of configuration saltus step is informed
User equipment and adjacent base station.In this way so that user equipment can find correctly
Resource element position and carry out channel measurement, and adjacent base station is selected preferably
Hop scheme scheme, so as to be avoided as much as resource contention.
In a kind of embodiment according to the method for the present invention, Equations of The Second Kind channel status will to be used for
The power of the transmission of information reference signal strengthens raising to 9dB or 12dB.In this way,
Guarantee to use resource block pair completely in the CSI-RS transmission for supporting 16 and 12 ports
Power.
In a kind of embodiment according to the method for the present invention, by the Equations of The Second Kind channel status
The length of the superposition orthogonal code between different port of information reference signal configuration is improved to 4.
In this way, it is also possible to guarantee the energy in the CSI-RS transmission for supporting 16 and 12 ports
The enough power for using resource block pair completely.
In a kind of embodiment according to the method for the present invention, step A includes：Under
Equations of The Second Kind channel state information reference signals described at least three are arranged in row pilot time slot frame are matched somebody with somebody
Put.In this way, it would be preferable to support 12 port of support in a tdd system or 16 ends
The CSI-RS transmission of mouth.
In a kind of embodiment according to the method for the present invention, set in descending pilot frequency time slot frame
Put the channel state information reference signals configuration of four 12 ports of support.In this way,
The idling-resource in DwPTS frames can be made full use of.
In sum, can be by configuring with reference to existing CSI-RS according to the method for the present invention
To construct the CSI-RS for supporting 12 and 16 ports configurations, so as to improve 3D-MIMO systems
Be energy.Additionally, configuration saltus step can reduce the probability of happening of resource contention.Furthermore, this
Bright support 12 in DwPTS frames and 16 ports additionally provided for TDD system
CSI-RS transmission.
Description of the drawings
Embodiments of the invention are explained further with reference to figure below and explanation, wherein：
Fig. 1 shows 8 port of support in the case of conventional cyclic prefix according to prior art
Channel state information reference signals configuration figure；
Fig. 2 show an embodiment of the invention for configurating channel status information
The method flow diagram of reference signal；
Fig. 3 show an embodiment of the invention in the case of conventional cyclic prefix
The channel state information reference signals of 16 port of support in a Physical Resource Block match somebody with somebody
Put figure；
Fig. 4 shows the channel for adjacent cell of an embodiment of the invention
The schematic diagram of state information reference signals configuration；
Fig. 5 shows the adjacent cell of an embodiment of the invention in time domain
Channel state information reference signals configure the schematic diagram of saltus step；
Fig. 6 shows the adjacent cell of an embodiment of the invention on frequency domain
Channel state information reference signals configure the schematic diagram of saltus step；
Fig. 7 a show an embodiment of the invention with 11 or 12
Available channel condition information in the descending pilot frequency time slot frame of OFDM symbol length is with reference to letter
The schematic diagram of number resource；
Fig. 7 b show an embodiment of the invention with 9 or 10
Available channel condition information in the descending pilot frequency time slot frame of OFDM symbol length is with reference to letter
The schematic diagram of number resource；
Fig. 8 a show an embodiment of the invention with 11 or 12
Channel state information reference signals configuration in the descending pilot frequency time slot frame of OFDM symbol length
First scheme；
Fig. 8 b show an embodiment of the invention with 9 or 10
Channel state information reference signals configuration in the descending pilot frequency time slot frame of OFDM symbol length
First scheme；
Fig. 9 a show an embodiment of the invention with 11 or 12
Channel state information reference signals configuration in the descending pilot frequency time slot frame of OFDM symbol length
Alternative plan；And
Fig. 9 b show an embodiment of the invention with 9 or 10
Channel state information reference signals configuration in the descending pilot frequency time slot frame of OFDM symbol length
Alternative plan.
Specific embodiment
In the specific descriptions of following preferred embodiment, reference is constituted into a present invention part
Appended accompanying drawing.Appended accompanying drawing has been illustrated by way of example the spy that can realize the present invention
Fixed embodiment.The embodiment of example is not intended as limit all embodiments of the invention.
It is appreciated that without departing from the scope of the present invention, it is possible to use other embodiment,
The modification of structural or logicality can also be carried out.Therefore, specific descriptions below are not limited
Property processed, and the scope of the present invention is defined by the claims appended hereto.
(the support of 40 resource elements 8 is limited in view of the port of existing CSI-RS
5 of CSI-RS ports configurations), the design of new CSI-RS ports template can be combined
Multiple existing CSI-RS configurations.Most direct scheme is to support the CSI-RS of 16 ports
Model is designed to 2 in 5 configurations of the existing CSI-RS models for supporting 8 ports
Combination.The program is able to ensure that CSI-RS density is 1RE/RB/Port.However, the party
It is 2 that case can cause the quantity of CSI-RS configurations, it means that between 3 adjacent cells
The average probability of resource contention can be very high, and the CSI-RS of 8 ports is always
It is useless.
Simultaneously, it is contemplated that backward compatible, it is not recommended that be used to map the resource of CSI-RS ports
Increase new resource element in block.This is because, it is new that traditional user equipment cannot set these
Resource element, and PDSCH punching can cause serious performance loss.
Therefore, it is complete that technical scheme is not required between each CSI-RS configuration
It is nonoverlapping, do not increase new resource element yet.Fig. 2 shows a reality of the invention
Apply the method flow diagram for configurating channel state information reference signals of mode.
As shown in Fig. 2 in step s 201, at least three are generated and supports 12 ports or 16
The Equations of The Second Kind channel state information reference signals configuration of port.Here, Equations of The Second Kind channel status letter
Breath reference signal is for supporting the of 2 ports or 4 ports or 8 ports with of the prior art
One class channel state information reference signals are mutually distinguished.
In step S202, person in servitude is distributed in the configuration of Equations of The Second Kind channel state information reference signals
Belong at least one of three adjacent cells of base station.Here, the present invention is not intended to limit being
Three adjacent cells are distributed in three Equations of The Second Kind channel state information reference signals configurations, also
It is by the configuration of a number of Equations of The Second Kind channel state information reference signals and a number of the
Three adjacent cells are distributed in the configuration of one class channel state information reference signals.
Fig. 3 show an embodiment of the invention in the case of conventional cyclic prefix
The channel state information reference signals of 16 port of support in a Physical Resource Block match somebody with somebody
Put figure.
As shown in figure 3, supporting that the CSI-RS configurations of 16 ports are two 8 ports of support
The combination of CSI-RS configurations.In the case where allowing to partly overlap, 8 can be supported by 5
The CSI-RS configurations of port are combined two-by-two, form the CSI-RS configurations of 5 16 ports of support.
One example is as follows：
Config160=Config80+Config81
Config161=Config81+Config82
Config162=Config82+Config83
Config163=Config83+Config84
Config164=Config84+Config80
Fig. 4 shows the channel for adjacent cell of an embodiment of the invention
The schematic diagram of state information reference signals configuration.
Here, 3 CSI-RS for adjacent cell configure can illustrate from Fig. 35
Select in individual configuration, its principle is so that resource is overlapped and is restricted to 8 resource elements.For example,
If selecting { Config160, Config162, Config164 } as 3 adjacent cells
CSI-RS is configured, then in Config160 and Config16Resource contention can occur between 4.And if
Select { Config160, Config161, Config163 }, then in Config160 and Config16Meeting between 1
Generation resource contention.
Additionally, the present invention can also support will support 16 ports CSI-RS configuration with it is traditional
First kind CSI-RS configures, for example supports the CSI-RS configurations of 8 ports and distributes to 3 together
Individual adjacent cell.For example, when the CSI-RS of two 16 ports of support of configuration is configured and one
When supporting that the CSI-RS of 8 ports is configured, resource contention can be avoided.
An embodiment of the invention, it is also possible to by multiple CSI-RS for supporting 4 ports
Configuration combines, to form the CSI-RS for supporting 16 ports configurations.For example：
Config160=Config40+Config41+Config42+Config43
Config161=Config43+Config44+Config45+Config46
Config162=Config46+Config47+Config48+Config49
An embodiment of the invention, can by support 8 ports CSI-RS configuration with
Support that the CSI-RS of 4 ports is configured to combine, to form the CSI-RS for supporting 12 ports configurations.
One example is as follows：
Config120=Config80+Config42
Config121=Config81+Config44
Config122=Config82+Config46
Config123=Config83+Config48
Config124=Config84+Config40
Especially, nonoverlapping 12 ports of supporting of 3 in a Resource Block can be designed
CSI-RS is configured.One example is as follows：
Config120=Config80+Config42
Config121=Config82+Config43
Config122=Config83+Config48
As shown in combination above, actually by the CSI-RS configurations of 58 ports of support
Two are split, and make them support that the CSI-RS configurations of 8 ports are mutually tied with 3 not split
Close.For compatibility and the cell global identity of keeping down, original support should be kept as much as possible
The CSI-RS configurations of 8 ports.Therefore, existing all of configuration is all split and is reconfigured
It is unfavorable.
In the present invention, the port index of each CSI-RS configuration can be changed.For example, for example,
Config160 and Config161 have it is common but using different port index methods
Config81.It is further possible to change the port index of each Resource Block pair.For each is matched somebody with somebody
Put or each Resource Block pair, the change of port index can be fixed, it is also possible to by height
Grade signaling, such as RRC signaling are informed.
If there is resource contention between two adjacent cells, i.e., the adjacent cell is selected
Partly overlapping CSI-RS, then can affect channel measurement, can especially substantially reduce
For the precision of the channel measurement of Cell Edge User equipment.
Therefore, the present invention is proposed and carrys out randomization due to overlap using the saltus step of CSI-RS configurations
CSI-RS and caused resource contention.On the one hand, enable to what is selected by cell
CSI-RS is changed in being configured in different subframes, and thus, resource contention also randomly can become
Change.On the other hand, it is also possible to carry out CSI-RS in the different Resource Block of same subframe
The change of configuration.
Fig. 5 shows the adjacent cell of an embodiment of the invention in time domain
Channel state information reference signals configure the schematic diagram of saltus step.
Here, the hopping list of CSI-RS configurations is { Config160, Config162, Config164}
{ Config160, Config161, Config163}.Configure relative to the CSI-RS in subframe m,
In subframe m+k, the CSI-RS configurations for being under the jurisdiction of three adjacent cells of same base station are carried out
Saltus step counterclockwise.Thus, resource contention can be shifted with the saltus step that CSI-RS is configured,
So as to same position will not be all located in whole transmitting procedure.
Fig. 6 shows the adjacent cell of an embodiment of the invention on frequency domain
Channel state information reference signals configure the schematic diagram of saltus step.
As shown in fig. 6, in the Resource Block n of subframe m, certain cell is allocated using support 16
The CSI-RS of port is with setting to 0.And in the Resource Block n+1 of subframe m, the cell is allocated and adopts
Support that the CSI-RS of 16 ports configures 2.
It will be appreciated by those skilled in the art that CSI-RS configurations saltus step of the invention also can
Carried out in frequency domain and time domain simultaneously.
In order that user equipment can find correct resource element position and carry out channel measurement,
Base station needs to notify to user equipment, for example, to believe by RRC by the hop scheme scheme that CSI-RS is configured
The mode of order.The hop scheme scheme for example includes saltus step type (time domain saltus step, frequency domain saltus step or two
The combination of person) and hopping list (in which kind of configuration of corresponding time and/or frequency usage).
Additionally, the hop scheme scheme that CSI-RS is configured also for example should be signaled by base station by X2
To other adjacent base stations, so that other adjacent base stations can select preferred saltus step side
Case, so as to be avoided as much as resource contention.
If the hop scheme scheme of CSI-RS configurations is using hopping list and fixed cycle, from base
The signaling stood to user equipment or other base stations is to set up the long-term, disposable of access phase
Signaling.For this reason, it may be necessary to define triggering signaling so that between different base stations and in base
The processing procedure synchronization stood and user equipment between.
If CSI-RS configuration hop scheme scheme be it is random, from base station to user equipment or its
The signaling of his base station should be transmitted with the saltus step same frequency of CSI-RS configurations.
In one embodiment according to the present invention, in order to ensure in 16 and 12 ports of support
Can completely using the power of resource block pair in CSI-RS transmission, it is proposed that following two side
Formula.
In first kind of way, it is possible to increase for the enhanced restriction of power of CSI-RS transmission.
For example improve to 9dB or 12dB.
In the second way, by increasing capacitance it is possible to increase the OCC length between different antenna ports.Example
Such as, OCC length is increased as 4.OCC length is being increased in the case of 4, each is being included in
Resource element in OCC sequences can be location-based, it is also possible to be based on antenna end stomochord
Draw.For example, for Config16For 0, when based on position, antenna port 0, Isosorbide-5-Nitrae,
5 } OCC4 sequences 0 can be used；Antenna port { 2,3,6,7 } can use OCC4 sequences 1；
Antenna port { 8,9,12,13 } can use OCC4 sequences 2；And antenna port 10,11,
14,15 } OCC4 sequences 3 can be used.And when based on antenna port, antenna port 0,1,
2,3 } OCC4 sequences 0 can be used；Antenna port { 4,5,6,7 } can use OCC4 sequences
Row 1；Antenna port { 8,9,10,11 } can use OCC4 sequences 2；And antenna port 12,
13,14,15 } OCC4 sequences 3 can be used.When antenna terminal mapping is different, it is included in
Resource element in each OCC sequence also can be different.
In addition in a Resource Block, the CSI-RS of 16 ports is supported in configuration, it is also possible in list
The CSI-RS of 16 ports is supported in configuration in the different Resource Block of individual subframe.
In one embodiment according to the present invention, can be by two with reference to identical subframe
The CSI-RS configurations of two 8 ports of support in individual Resource Block support 16 ports to be formed
CSI-RS is configured.Here, needing having to explicitly or implicitly to inform corresponding Resource Block.In recessiveness
Mode under, cycle and the Secondary resource block relative to first resource block are being indicated by signaling
Skew.The design in the case of conventional cyclic prefix supports that the CSI-RS of 16 ports configures one
Example is as follows：
Config16(0, f, t)=Config8(0,f,t)+Config8((0+x)mod4,f+Δf,t)
Config16(1,f,t)=Config8(1,f,t)+Config8((1+x)mod4,f+Δf,t)
Config16(2, f, t)=Config8(2,f,t)+Config8((2+x)mod4,f+Δf,t)
Config16(3, f, t)=Config8(3,f,t)+Config8((3+x)mod4,f+Δf,t)
Config16(4, f, t)=Config8(4,f,t)+Config8((4+x)mod4,f+Δf,t)
Wherein, f represents Resource Block index in a frequency domain, and Δ f >=1 is represented in different resource block
8 port of support CSI-RS configurations Resource Block skew, t represents subframe index, and x is represented
Configuration skew between different Resource Block, configuration skew can be constant, or saltus step
List, or by high-grade signaled.
Additionally, the CSI-RS configurations one of 12 ports are supported in design in the case of conventional cyclic prefix
Individual example is as follows：
Config12(0, f, t)=Config8(0,f,t)+Config4((0+x)mod9,f+Δf,t)
Config12(1, f, t)=Config8(1,f,t)+Config4((2+x)mod9,f+Δf,t)
Config12(2, f, t)=Config8(2,f,t)+Config4((4+x)mod9,f+Δf,t)
Config12(3, f, t)=Config8(3,f,t)+Config4((6+x)mod9,f+Δf,t)
Config12(4, f, t)=Config8(4,f,t)+Config4((8+x)mod9,f+Δf,t)
In the allocation plan, it is not in the CSI-RS of the half of second resource block pair
Use, therefore, it is possible to by the CSI-RS in these untapped resources and the 3rd Resource Block
Resource is used together.So as to 10 CSI-RS configurations are provided per 3 resource block pairs,
This causes configuration even closer.For the example of the CSI-RS configurations of other 5 12 ports of support
It is as follows：
Config12(5, f, t)=Config8(0,f+2Δf,t)+Config4((1+x)mod9,f+Δf,t)
Config12(6, f, t)=Config8(1,f+2Δf,t)+Config4((3+x)mod9,f+Δf,t)
Config12(7, f, t)=Config8(2,f+2Δf,t)+Config4((5+x)mod9,f+Δf,t)
Config12(8, f, t)=Config8(3,f+2Δf,t)+Config4((7+x)mod9,f+Δf,t)
Config12(9, f, t)=Config8(4,f+2Δf,t)+Config4((9+x)mod9,f+Δf,t)
In the scheme of the CSI-RS configurations in reference to different resource block, 16 ports are supported
CSI-RS configurations can be mapped to the same OFDM of the different Resource Block of same subframe
At the position of the CSI-RS of 8 port of support of symbol.This can cause, and the CSI-RS's of 16 ports is close
Degree is 0.5RE/RB/Port in frequency domain, so as to the precision that also can affect channel measurement.However,
This impact to certainty of measurement is acceptable.Meanwhile, in reference to two Resource Block
In the case that CSI-RS is configured, using the teaching of the invention it is possible to provide 5 under general cyclic prefix pattern do not overlap
CSI-RS configurations or 4 under extended cyclic prefix pattern nonoverlapping CSI-RS configurations,
This can simplify the CSI-RS configurations of minizone.
In one embodiment according to the present invention, can be by combining in two subframes
The CSI-RS configurations of two 8 ports of support are configured come the CSI-RS for forming 16 ports of support.For this purpose,
The sub-frame offset to the cycle and between the first subframe and the second subframe is needed to carry out dominant
Or the explanation of recessiveness.
The design in the case of conventional cyclic prefix supports that the CSI-RS of 16 ports configures one and shows
For example it is lower shown：
Config16(0, f, t)=Config8(0,f,t)+Config8((0+x)mod4,f,t+Δt)
Config16(1, f, t)=Config8(1,f,t)+Config8((1+x)mod4,f,t+Δt)
Config16(2, f, t)=Config8(2,f,t)+Config8((2+x)mod4,f,t+Δt)
Config16(3, f, t)=Config8(3,f,t)+Config8((3+x)mod4,f,t+Δt)
Config16(4, f, t)=Config8(4,f,t)+Config8((4+x)mod4,f,t+Δt)
Wherein, f represents Resource Block index in a frequency domain, and t represents subframe index, 1≤Δ t≤T tables
Show the sub-frame offset that the CSI-RS of 8 port of support to be combined in different subframes is configured, x
The configuration skew between different subframes is represented, the configuration skew can be constant or saltus step
List.
Additionally, the CSI-RS configurations one of 12 ports are supported in design in the case of conventional cyclic prefix
Individual example is as follows：
Config12(0, f, t)=Config8(0,f,t)+Config4((0+x)mod9,f,t+Δt)
Config12(1, f, t)=Config8(1,f,t)+Config4((2+x)mod9,f,t+Δt)
Config12(2, f, t)=Config8(2,f,t)+Config4((4+x)mod9,f,t+Δt)
Config12(3, f, t)=Config8(3,f,t)+Config4((6+x)mod9,f,t+Δt)
Config12(4, f, t)=Config8(4,f,t)+Config4((8+x)mod9,f,t+Δt)
In the allocation plan, the CSI-RS of the half in second subframe is unused
, therefore, it is possible to by the CSI-RS one in these untapped resources and the 3rd subframe
Rise and use.So as to 10 CSI-RS configurations are provided in per 3 subframes, this causes configuration
It is even closer.Example for the CSI-RS configurations of other 5 12 ports of support is as follows：
Config12(5, f, t)=Config8(0,f,t+2Δt)+Config4((1+x)mod9,f,t+Δt)
Config12(6, f, t)=Config8(1,f,t+2Δt)+Config4((3+x)mod9,f,t+Δt)
Config12(7, f, t)=Config8(2,f,t+2Δt)+Config4((5+x)mod9,f,t+Δt)
Config12(8, f, t)=Config8(3,f,t+2Δt)+Config4((7+x)mod9,f,t+Δt)
Config12(9, f, t)=Config8(4,f,t+2Δt)+Config4((9+x)mod9,f,t+Δt)
The CSI-RS of 16 ports can be caused to support with reference to the scheme of CSI-RS configurations in different subframes
Density in time domain be 0.5RE/RB/Port, so as to the precision of channel measurement can be affected,
Feedback delay and the complexity for caching the user equipment of channel measurement can be caused.However, this
The impact planted to certainty of measurement is acceptable.Meanwhile, configure with reference to CSI-RS in different subframes
The CSI-RS configurations of minizone can also be simplified.
It will be appreciated by those skilled in the art that also can simultaneously using 2 Resource Block on frequency domain
To and time domain on 2 subframes providing 10 CSI-RS configuration.
In one embodiment according to the present invention, at least three can be arranged in DwPTS frames
The individual CSI-RS configurations for supporting 16 ports or 12 ports.
Not with predefined public reference signal (CRS), demodulated reference signal (DMRS)
On the premise of collision is produced with Physical Downlink Control Channel (PDCCH) resource, Neng Gou
Configure CSI-RS in DwPTS frames without limitation.
Fig. 7 a and Fig. 7 b respectively illustrate an embodiment of the invention with 11
Or 12 OFDM symbol length and with 10 or 9 OFDM symbol length
The schematic diagram of the available CSI-RS in DwPTS frames.Here is directed to regular circulation
Prefix pattern.For simultaneously for the DwPTS frames with other OFDM symbol length,
Its available resources is not enough to implement CSI-RS mapping.
Fig. 8 a and Fig. 8 b respectively illustrate an embodiment of the invention with 11
Or 12 OFDM symbol length and with 10 or 9 OFDM symbol length
The first scheme of the CSI-RS configurations in DwPTS frames.In the first scheme, 3 supports
The CSI-RS configurations of 16 ports are nonoverlapping, and for different antenna ports and configuration
Time migration and frequency shift (FS) it is similar as much as possible.
Fig. 9 a and Fig. 9 b respectively illustrate an embodiment of the invention with 11
Or 12 OFDM symbol length and with 10 or 9 OFDM symbol length
The alternative plan of the CSI-RS configurations in DwPTS frames.In the alternative plan, when not considering
Between and frequency shift (FS), but for different length DwPTS configurations using as similar as possible
CSI-RS ponds.
In one embodiment according to the present invention, for the construction support in DwPTS frames
The CSI-RS configurations of 12 ports, can move from the CSI-RS configurations of each 16 port of support
Except 4 resource elements.Therefore, in a DwPTS frame, can construct 4 it is non-overlapped
12 port of support CSI-RS configuration.
In one embodiment according to the present invention, can be by the OCC length in DwPTS frames
Degree is improved to 4, or power is strengthened raising to 9dB or 12dB.
In one embodiment according to the present invention, can be in different DwPTS frames and money
Source block centering constructs a CSI-RS configuration for supporting 16 ports or 12 ports.
In one embodiment according to the present invention, two in DwPTS frames be can allow for
Exist between individual CSI-RS configurations and overlap, and money can be reduced by the way of configuration saltus step
The probability of source conflict.
Although it will be appreciated by those skilled in the art that the above embodiments are both for regular circulation
In the case of prefix, but the present invention is not restricted to this, and the method according to the invention also can
Apply in the case of extended cyclic prefix.
Although the foregoing describing the specific embodiment of the present invention, technology people in the art
Member can make various changes and modifications within the scope of the appended claims.
Claims (15)
1. a kind of method for configurating channel state information reference signals in a base station, described
Method is comprised the following steps：
A. at least three Equations of The Second Kind channel condition informations for supporting 12 ports or 16 ports are generated
Reference signal configuration；And
B. Equations of The Second Kind channel state information reference signals configuration is distributed to described in being under the jurisdiction of
At least one of three adjacent cells of base station.
2. method according to claim 1, it is characterised in that step A includes：
In single resource block pair by multiple first kind channels for supporting 2 ports or 4 ports or 8 ports
State information reference signals configuration combines, to generate Equations of The Second Kind channel status described at least three
Information reference signal is configured.
3. method according to claim 1, it is characterised in that step A includes：
Single subframe multiple resource block pairs by multiple 2 ports or 4 ports or 8 ports supported
The configuration of first kind channel state information reference signals combines, to generate second described at least three
Class channel state information reference signals are configured.
4. method according to claim 4, it is characterised in that in 3 Resource Block pair
The middle channel state information reference signals configuration for generating 10 12 ports of support.
5. method according to claim 1, it is characterised in that step A includes：
By multiple first kind channel status for supporting 2 ports or 4 ports or 8 ports in multiple subframes
The configuration of information reference signal combines, to generate Equations of The Second Kind channel condition information described at least three
Reference signal configuration.
6. method according to claim 5, it is characterised in that raw in 3 subframes
Into the channel state information reference signals configuration of 10 12 ports of support.
7. method according to claim 1, it is characterised in that step B includes
Any one of following sub-step：
B1. by the Equations of The Second Kind channel state information reference signals configuration distribute to three it is adjacent
Cell；
B2. by the Equations of The Second Kind channel state information reference signals and 2 ports of support or 4 ports
Or 8 the first kind channel state information reference signals of port distribute to three adjacent cells.
8. method according to claim 1, it is characterised in that if distributed to adjacent
Cell channel state information reference signals configuration with overlap resource element, then to described
Channel state information reference signals configuration carries out saltus step.
9. method according to claim 8, it is characterised in that so that distributing to adjacent
The channel state information reference signals of cell carry out saltus step in being configured in different subframes.
10. method according to claim 8, it is characterised in that so that distributing to adjacent
The channel state information reference signals of cell be configured in the different Resource Block of single subframe
Carry out saltus step.
11. methods according to any one of claim 8 to 10, it is characterised in that
The scheme of configuration saltus step is informed into user equipment and adjacent base station.
12. methods according to claim 1, it is characterised in that Equations of The Second Kind letter will be used for
The power of the transmission of channel state information reference signal strengthens raising to 9dB or 12dB.
13. profits require the method described in 1, it is characterised in that by the Equations of The Second Kind channel status
The length of the superposition orthogonal code between different port of information reference signal configuration is improved to 4.
14. methods according to claim 1, it is characterised in that step A includes：
Equations of The Second Kind channel condition information described at least three is set in descending pilot frequency time slot frame with reference to letter
Number configuration.
15. methods according to claim 14, it is characterised in that in descending pilot frequency
The channel state information reference signals configuration of four 12 ports of support is set in gap frame.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110366247A (en) * | 2018-03-26 | 2019-10-22 | 上海朗帛通信技术有限公司 | A kind of user equipment that be used to wirelessly communicate, the method and apparatus in base station |
| CN111050392A (en) * | 2018-10-11 | 2020-04-21 | 中国移动通信有限公司研究院 | Method and device for improving power of channel state information reference signal and communication equipment |
| CN112740570A (en) * | 2018-09-21 | 2021-04-30 | 阿里斯卡尔股份有限公司 | Channel state information reference signal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160826A (en) * | 2015-04-20 | 2016-11-23 | 中国移动通信集团公司 | CSI-RS configuration and CSI feedback method, device and relevant device |
-
2015
- 2015-09-24 CN CN201510617756.5A patent/CN106559181B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106160826A (en) * | 2015-04-20 | 2016-11-23 | 中国移动通信集团公司 | CSI-RS configuration and CSI feedback method, device and relevant device |
Non-Patent Citations (2)
| Title |
|---|
| CMCC: "3D-MIMO measurement resources and CSI process definition", 《3GPP TSG RAN WG1 MEETING #82，R1-154299》 * |
| LG ELECTRONICS: "Discussion on 12 and 16 port non-precoded CSI-RS design", 《3GPP TSG RAN WG1 MEETING #82，R1-154273》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110366247A (en) * | 2018-03-26 | 2019-10-22 | 上海朗帛通信技术有限公司 | A kind of user equipment that be used to wirelessly communicate, the method and apparatus in base station |
| CN110366247B (en) * | 2018-03-26 | 2021-07-27 | 上海朗帛通信技术有限公司 | Method and device used in user equipment and base station for wireless communication |
| CN112740570A (en) * | 2018-09-21 | 2021-04-30 | 阿里斯卡尔股份有限公司 | Channel state information reference signal |
| CN112740570B (en) * | 2018-09-21 | 2022-03-04 | 阿里斯卡尔股份有限公司 | Channel state information reference signal |
| CN111050392A (en) * | 2018-10-11 | 2020-04-21 | 中国移动通信有限公司研究院 | Method and device for improving power of channel state information reference signal and communication equipment |
| CN111050392B (en) * | 2018-10-11 | 2023-05-05 | 中国移动通信有限公司研究院 | Method and device for improving channel state information reference signal power and communication equipment |
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