CN106559181B - Method for configurating channel state information reference signals - Google Patents
Method for configurating channel state information reference signals Download PDFInfo
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- CN106559181B CN106559181B CN201510617756.5A CN201510617756A CN106559181B CN 106559181 B CN106559181 B CN 106559181B CN 201510617756 A CN201510617756 A CN 201510617756A CN 106559181 B CN106559181 B CN 106559181B
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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 methods for configurating channel state information reference signals in a base station, method includes the following steps: A., which generates at least three, supports the configuration of the second class channel state information reference signals of 12 ports or 16 ports；B., second class channel state information reference signals configuration is distributed to three adjacent at least one of cells for being under the jurisdiction of the base station.Method according to the present invention can be by supporting the CSI-RS of 12 and 16 ports to configure, so that improve 3D-MIMO system is energy in conjunction with existing CSI-RS configuration to construct.In addition, configuration jump can reduce the probability of happening of resource contention.Furthermore the present invention also provides the CSI-RS transmissions of the port of support 12 and 16 in DwPTS frame for TDD system.
Description
Technical field
The present invention relates to wireless communication fields, and in particular, to a kind of for configurating channel state information reference signals
Method.
Background technique
In nearest 3GPP meeting, 3D multiple-input, multiple-output (MIMO) channel model is adopted, meanwhile, it also studies and proposes
The corresponding scheme for being used to obtain gain from 3D multi-input and multi-output channel.
In RAN#68, promoted beam forming/Quan Weidu (EBF/FD)-multiple-input, multiple-output working group explicitly point out, using
The 2D aerial array of the cross-pole with base station in height and direction is determined to be improvement.The working group is intended to include non-
Channel state information reference signals (the CSI-RS:channel state information- of precoding and beam forming
Reference signal) enhancing.Particularly with non-precoded CSI-RS, existing number is extended using full port mapping
The CSI-RS antenna port that amount is 1,2,4 or 8, to support the CSI-RS of 12 and 16 ports.
Fig. 1 shows the channel state information of 8 port of support in conventional cyclic prefix according to prior art
The configuration diagram of reference signal.As shown in Figure 1,40 resource elements are divided into the CSI-RS configuration of 58 ports of support, and
CSI-RS density is 1RE/RB/Port.It is not provided with the CSI-RS allocation plan for supporting 16 ports in the prior art.
Meanwhile in current CSI-RS allocation plan, superposition orthogonal code (OCC:orthogonal cover code)
Length is 2, i.e., the same position CSI-RS is shared in every two port.And in current standard, maximum power enhancing
(power boosting) is limited in 6dB, this is that can use resource block pair completely for supporting the CSI-RS transmission of 8 ports
In power.However, in the CSI-RS transmission for supporting 16 and 12 ports, the power enhancing of OCC and 6dB that length is 2 are
It can not be completely using the power of resource block pair.
In addition, not supporting the descending pilot frequency time slot (DwPTS) under time division duplex (TDD) mode in existing standard
Any CSI-RS transmission in frame.
Summary of the invention
In order to provide the CSI-RS allocation plan for supporting 12 ports or 16 ports, and resource contention is reduced as much as possible
Probability, and the CSI-RS transmission in order to support 12 port of support or 16 ports in a tdd system, it is necessary to propose a kind of excellent
The method for the CSI-RS configuration for 12 ports of support or 16 ports to be arranged changed.
In order to achieve the object of the present invention, the first aspect of the present invention provides a kind of for configurating channel shape in a base station
The method of state information reference signal, the described method comprises the following steps: A. generates at least three and supports 12 ports or 16 ports
The configuration of second class channel state information reference signals；And the second class channel state information reference signals are configured and are distributed by B.
Give three for being under the jurisdiction of the base station adjacent at least one of cell.
By the above method, make it possible to be formed the second class letter of at least three supports, 12 port or 16 ports in a base station
Channel state information reference signal configuration.At least three second class channel state information reference signals configuration can be used in being under the jurisdiction of
The configuration of three neighbouring cells of the base station, to be conducive to improve performance gain.
In a kind of embodiment of method according to the present invention, the step A includes: will be more in single resource block pair
It is a that the configuration of the first kind channel state information reference signals of 2 ports or 4 ports or 8 ports is supported to combine, to generate at least three
A second class channel state information reference signals configuration.In this way, it can be realized in single resource block to
The support of two class CSI-RS configuration.
In a kind of embodiment of method according to the present invention, the step A includes: multiple resources in single subframe
Block centering combines the configuration of the first kind channel state information reference signals of 2 ports of multiple supports or 4 ports or 8 ports, with
Generate at least three second class channel state information reference signals configurations.In this way caused by measurement accuracy
Influence be acceptable.Meanwhile in the case where combining the CSI-RS configuration in two resource blocks, it is capable of providing and is commonly following
5 nonoverlapping CSI-RS configurations under ring prefix pattern or 4 nonoverlapping CSI-RS under extended cyclic prefix mode
Configuration, this can simplify the CSI-RS configuration of minizone.
In a kind of embodiment of method according to the present invention, 10 12 ports of support are generated in 3 resource block pairs
Channel state information reference signals configuration.In this way, so that configuration is even closer, money can be maximally utilised
Source.
In a kind of embodiment of method according to the present invention, the step A includes: in multiple subframes by multiple
The first kind channel state information reference signals configuration for holding 2 ports or 4 ports or 8 ports combines, to generate at least three institutes
State the configuration of the second class channel state information reference signals.The influence to measurement accuracy caused by this way is acceptable
's.Meanwhile which can simplify the CSI-RS configuration of minizone.
In a kind of embodiment of method according to the present invention, the letter of 10 12 ports of support is generated in 3 subframes
Channel state information reference signal configuration.In this way, it is also possible that configuration is even closer, and maximally utilise
Resource.
In a kind of embodiment of method according to the present invention, the step B includes any one of following sub-step:
B1. three adjacent cells are distributed into the second class channel state information reference signals configuration；B2. second class is believed
Channel state information reference signal and the first kind channel state information reference signals of 2 ports of support or 4 ports or 8 ports are distributed to
Three adjacent cells.In this way, the second class CSI-RS configuration for supporting 12 ports or 16 ports can not only be provided,
And it being capable of backward compatible traditional cell for only supporting first kind CSI-RS configuration.
In a kind of embodiment of method according to the present invention, if distributing to the channel state information of adjacent cell
Reference signal configuration has the resource element of overlapping, then jumps to channel state information reference signals configuration.Pass through
This mode, resource contention caused by the CSI-RS resource due to overlapping capable of being randomized by the jump configured, thus
Improve the precision of channel measurement.
In a kind of embodiment of method according to the present invention, so that distributing to the channel state information of adjacent cell
Reference signal configuration is jumped in different subframes.
In a kind of embodiment of method according to the present invention, so that distributing to the channel state information of adjacent cell
Reference signal configuration is jumped in the different resource blocks of single subframe.
In a kind of embodiment of method according to the present invention, the scheme of configuration jump is informed into user equipment and adjacent
Base station.In this way, enable user equipment to find correct resource element position and carry out channel measurement, and
Adjacent base station is enabled to select preferred hop scheme scheme, to be avoided as much as resource contention.
In a kind of embodiment of method according to the present invention, the second class channel state information reference signals will be used for
The power enhancing of transmission is improved to 9dB or 12dB.In this way it is ensured that in the CSI-RS transmission for supporting 16 and 12 ports
The power of resource block pair can be used completely.
In a kind of embodiment of method according to the present invention, the second class channel state information reference signals are matched
The length for the superposition orthogonal code between different port set is improved to 4.In this way, it can also ensure that and supporting 16 Hes
The power of resource block pair can be used in the CSI-RS transmission of 12 ports completely.
In a kind of embodiment of method according to the present invention, the step A includes: to set in descending pilot frequency time slot frame
Set at least three second class channel state information reference signals configurations.In this way, it can support in a tdd system
12 port of support or 16 ports CSI-RS transmission.
In a kind of embodiment of method according to the present invention, four 12 ends of support are set in descending pilot frequency time slot frame
The channel state information reference signals configuration of mouth.In this way, it can make full use of the idling-resource in DwPTS frame.
In conclusion method according to the present invention can be by supporting 12 and 16 in conjunction with existing CSI-RS configuration to construct
The CSI-RS of port is configured, so that improve 3D-MIMO system is energy.In addition, configuration jump can reduce the hair of resource contention
Raw probability.Furthermore the present invention also provides the CSI-RS of the port of support 12 and 16 in DwPTS frame for TDD system biographies
It is defeated.
Detailed description of the invention
The embodiment of the present invention is explained further referring to following attached drawing and explanation, in which:
Fig. 1 shows the channel state information of 8 port of support in conventional cyclic prefix according to prior art
The configuration diagram of reference signal；
Fig. 2 shows the methods for configurating channel state information reference signals according to embodiment of the present invention
Flow chart；
Fig. 3 shows providing in a physics in conventional cyclic prefix according to embodiment of the present invention
The configuration diagram of the channel state information reference signals of 16 port of support in source block；
Fig. 4 shows the channel state information for adjacent cell according to embodiment of the present invention with reference to letter
Number configuration schematic diagram；
Fig. 5 shows the channel state information ginseng of adjacent cell according to embodiment of the present invention in the time domain
Examine the schematic diagram of signal configuration jump；
Fig. 6 shows channel state information ginseng of the adjacent cell according to embodiment of the present invention on frequency domain
Examine the schematic diagram of signal configuration jump；
Fig. 7 a show according to embodiment of the present invention with 11 or 12 OFDM symbol length downlink
The schematic diagram of available channel state information reference signals resource in pilot time slot frame；
Fig. 7 b shows leading with the downlinks of 9 or 10 OFDM symbol length according to embodiment of the present invention
The schematic diagram of available channel state information reference signals resource in frequency time slot frame；
Fig. 8 a show according to embodiment of the present invention with 11 or 12 OFDM symbol length downlink
The first scheme of channel state information reference signals configuration in pilot time slot frame；
Fig. 8 b shows leading with the downlinks of 9 or 10 OFDM symbol length according to embodiment of the present invention
The first scheme of channel state information reference signals configuration in frequency time slot frame；
Fig. 9 a show according to embodiment of the present invention with 11 or 12 OFDM symbol length downlink
The alternative plan of channel state information reference signals configuration in pilot time slot frame；And
Fig. 9 b shows leading with the downlinks of 9 or 10 OFDM symbol length according to embodiment of the present invention
The alternative plan of channel state information reference signals configuration in frequency time slot frame.
Specific embodiment
In the following detailed description of the preferred embodiment, reference is constituted to the appended attached drawing of present invention a part.Institute
Attached attached drawing, which has been illustrated by way of example, can be realized specific embodiment.Exemplary embodiment is not intended to
Exhaustive all embodiments according to the present invention.It is appreciated that without departing from the scope of the present invention, can use other
Embodiment can also carry out the modification of structure or logic.Therefore, it is below specific descriptions and it is unrestricted, and this
The range of invention is defined by the claims appended hereto.
In view of the port of existing CSI-RS limits, (5 of 8 ports CSI-RS of support of 40 resource elements match
Set), the design of the new port CSI-RS template can be configured in conjunction with multiple existing CSI-RS.Most direct scheme is to prop up
2 knots in 5 configurations of the CSI-RS model that the CSI-RS model for holding 16 ports is designed to 8 ports of existing support
It closes.The program can ensure that CSI-RS density is 1RE/RB/Port.However, the quantity that the program will lead to CSI-RS configuration is
2, it means that the average probability of the resource contention between 3 adjacent cells can be very high, and the CSI-RS of 8 ports
Resource is always useless.
Simultaneously, it is contemplated that backward compatible, it is not recommended that increase new resource in the resource block for mapping the port CSI-RS
Element.This is because traditional user equipment can not set these new resource elements, and PDSCH punching will lead to seriously
Performance loss.
Therefore, technical solution of the present invention be not required between each CSI-RS configuration be it is completely nonoverlapping, also do not increase
Add new resource element.Fig. 2 shows believing for configurating channel state information references according to embodiment of the present invention
Number method flow diagram.
As shown in Fig. 2, in step s 201, generating at least three the second class channel status for supporting 12 ports or 16 ports
The configuration of information reference signal.Here, the second class channel state information reference signals be for 2 ports of support in the prior art
Or 4 the first kind channel state information reference signals of port or 8 ports mutually distinguish.
In step S202, the configuration of the second class channel state information reference signals is distributed to three phases for being under the jurisdiction of base station
Adjacent at least one of cell.Here, it is to match three the second class channel state information reference signals that the present invention, which is not intended to limit,
It sets and distributes to three adjacent cells, or a certain number of second class channel state information reference signals are configured and a fixed number
Three adjacent cells are distributed in the first kind channel state information reference signals configuration of amount.
Fig. 3 shows providing in a physics in conventional cyclic prefix according to embodiment of the present invention
The configuration diagram of the channel state information reference signals of 16 port of support in source block.
As shown in figure 3, supporting that the CSI-RS configuration of 16 ports is the combination of the CSI-RS configuration of two 8 ports of support.?
In the case where allowing to partly overlap, the CSI-RS configuration of 8 ports can be supported to combine two-by-two by 5, form 5 16 ports of support
CSI-RS configuration.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 state information for adjacent cell according to embodiment of the present invention with reference to letter
Number configuration schematic diagram.
Here, 3 CSI-RS configuration for adjacent cell can be selected from 5 configurations shown in Fig. 3, it is former
It is then so that resource overlapping is restricted to 8 resource elements.For example, if selection { Config160, Config162,
Config164 } the CSI-RS configuration of the cell adjacent as 3, then in Config160 and Config16Resource can occur between 4
Conflict.And if selection { Config160, Config161, Config163 }, then in Config160 and Config16It can be sent out between 1
Raw resource contention.
In addition, the present invention can also support that the CSI-RS of 16 ports will be supported to configure matches with traditional first kind CSI-RS
It sets, for example support the CSI-RS of 8 ports is configured to distribute to 3 adjacent cells together.For example, when two 16 ports of support of configuration
CSI-RS configuration and one support 8 ports CSI-RS configuration when, can be avoided resource contention.
According to embodiment of the present invention, multiple CSI-RS configurations for supporting 4 ports can also be combined, with shape
At the CSI-RS configuration for supporting 16 ports.Such as:
Config160=Config40+Config41+Config42+Config43
Config161=Config43+Config44+Config45+Config46
Config162=Config46+Config47+Config48+Config49
According to embodiment of the present invention, CSI-RS configuration and the CSI- of 4 ports of support of 8 ports can will be supported
RS configuration combines, to form the CSI-RS configuration for supporting 12 ports.One example is as follows:
Config120=Config80+Config42
Config121=Config81+Config44
Config122=Config82+Config46
Config123=Config83+Config48
Config124=Config84+Config40
Particularly, 3 nonoverlapping CSI-RS configurations for supporting 12 ports in a resource block can be designed.One
Example is as follows:
Config120=Config80+Config42
Config121=Config82+Config43
Config122=Config83+Config48
As shown in combination above, actually 5 are supported two in the CSI-RS configuration of 8 ports split,
And combine them with the CSI-RS configuration for 38 ports of support not split.For compatibility and the honeycomb spy of keeping down
Property, original CSI-RS configuration for supporting 8 ports is kept as far as possible.Therefore, existing all configurations are all split
And it is unfavorable for reconfiguring.
In the present invention, the port index of each CSI-RS configuration can be changed.For example, for example, Config160 He
Config161 has Config common but using different port index methods81.It is further possible to change each resource
The port index of block pair.For it is each configuration or each resource block pair, the variation of port index can be it is fixed, also can
It is informed by high-grade signaling, such as RRC signaling.
If resource contention occurs between two adjacent cells, i.e., the adjacent cell has selected partly overlapping
CSI-RS resource then will affect channel measurement, especially will be greatly reduced the channel measurement for Cell Edge User equipment
Precision.
Therefore, the invention proposes the jumps for using CSI-RS to configure to lead being randomized the CSI-RS resource due to overlapping
The resource contention of cause.On the one hand, the CSI-RS selected by cell configuration is enabled to be changed in different subframes, by
This, resource contention also can randomly change.On the other hand, also CSI- can be carried out in the different resource blocks of the same subframe
The variation of RS configuration.
Fig. 5 shows the channel state information ginseng of adjacent cell according to embodiment of the present invention in the time domain
Examine the schematic diagram of signal configuration jump.
Here, the hopping list of CSI-RS configuration is { Config160, Config162, Config164 } and { Config160,
Config161, Config163}.Relative to the CSI-RS configuration in subframe m, in subframe m+k, it is under the jurisdiction of same base station
The CSI-RS configuration of three adjacent cells has carried out jump counterclockwise.Resource contention can be configured with CSI-RS as a result,
It jumps and shifts, so that same position will not be all located in entire transmission process.
Fig. 6 shows channel state information ginseng of the adjacent cell according to embodiment of the present invention on frequency domain
Examine the schematic diagram of signal configuration jump.
As shown in fig. 6, some cell is assigned using the CSI-RS configuration for supporting 16 ports in the resource block n of subframe m
0.And in the resource block n+1 of subframe m, which is assigned using the CSI-RS configuration 2 for supporting 16 ports.
It will be appreciated by those skilled in the art that CSI-RS configuration jump according to the present invention also can be in frequency domain and time domain
It carries out simultaneously.
In order to enable user equipment to find correct resource element position and carry out channel measurement, base station is needed CSI-
The hop scheme scheme of RS configuration is notified to user equipment, such as by way of RRC signaling.The hop scheme scheme is for example including jump class
(in corresponding time and/or frequency usage, which kind of is matched for type (combination of time domain jump, frequency domain jump or both) and hopping list
It sets).
In addition, base station should also for example be signaled the CSI-RS hop scheme scheme configured by X2 to other adjacent bases
It stands, so that other adjacent base stations can select preferred hop scheme scheme, to be avoided as much as resource contention.
If the hop scheme scheme of CSI-RS configuration using hopping list and fixed period, from base station to user equipment or
The signaling of other base stations is in long-term, the disposable signaling for establishing access phase.For this reason, it may be necessary to define triggering signaling so that
Treatment process between different base stations and between the base station and the user equipment is synchronous.
If CSI-RS configuration hop scheme scheme be it is random, the signaling from base station to user equipment or other base stations is answered
It is transmitted when the jump same frequency configured with CSI-RS.
In one embodiment according to the present invention, in order to ensure the energy in the CSI-RS transmission for supporting 16 and 12 ports
The enough power for using resource block pair completely, proposes following two mode.
In the first way, it can be improved the limitation of the power enhancing for CSI-RS transmission.Such as improve to 9dB or
12dB。
In the second way, the OCC length between different antenna ports can be increased.For example, OCC length is increased
It is 4.In the case where OCC length is increased to 4, can be including the resource element in each OCC sequence it is location-based,
Can be indexed based on antenna port.For example, for Config16For 0, when being based on position, antenna port { 0, Isosorbide-5-Nitrae, 5 }
It is able to use OCC4 sequence 0；Antenna port { 2,3,6,7 } is able to use OCC4 sequence 1；Antenna port { 8,9,12,13 } can
Use OCC4 sequence 2；And antenna port { 10,11,14,15 } is able to use OCC4 sequence 3.And when being based on antenna port, day
Line end mouth { 0,1,2,3 } is able to use OCC4 sequence 0；Antenna port { 4,5,6,7 } is able to use OCC4 sequence 1；Antenna port
{ 8,9,10,11 } are able to use OCC4 sequence 2；And antenna port { 12,13,14,15 } is able to use OCC4 sequence 3.Work as antenna
It, also can be different including the resource element in each OCC sequence when port mapping difference.
It, also can be in the different of single subframe other than configuring the CSI-RS for supporting 16 ports in a resource block
The CSI-RS of 16 ports is supported in configuration in resource block.
In one embodiment according to the present invention, two in two resource blocks of the identical subframe of combination can be passed through
A CSI-RS configuration for supporting 8 ports supports the CSI-RS of 16 ports to configure to be formed.Here, needing having to explicitly or implicitly to accuse
Know corresponding resource block.Under recessive mode, by signaling in the instruction period and relative to the second money of first resource block
The offset of source block.It is as follows to support that the CSI-RS of 16 ports configures an example for design in the case where conventional cyclic prefix:
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 indicates that resource block index in a frequency domain, Δ f >=1 indicate 8 port of support in different resource block
The resource block offset of CSI-RS configuration, t indicate subframe index, and x indicates the configuration offset between different resource blocks, the configuration
Offset can be constant or hopping list, or by high-grade signaled.
In addition, design supports the CSI-RS of 12 ports to configure the following institute of an example in the case where conventional cyclic prefix
Show:
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, be in the CSI-RS resource of the half of second resource block pair it is not used, therefore, energy
It is enough to be used together these not used resources with the CSI-RS resource in third resource block.So as in every 3 resources
Block centering provides 10 CSI-RS configurations, this to configure even closer.The CSI-RS configuration of 12 ports is supported for other 5
Example 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 for combining the CSI-RS configuration in different resource block, support the CSI-RS configuration of 16 ports that can be mapped
To at the position of the CSI-RS of 8 port of support of the same OFDM symbol of the different resource blocks of same subframe.This can lead
Cause the density of the CSI-RS of 16 ports frequency domain be 0.5RE/RB/Port, to also will affect the precision of channel measurement.However,
This influence to measurement accuracy is acceptable.Meanwhile in the case where combining the CSI-RS configuration in two resource blocks, energy
5 nonoverlapping CSI-RSs configurations or 4 under extended cyclic prefix mode of enough offers under general cyclic prefix mode
Nonoverlapping CSI-RS configuration, this can simplify the CSI-RS configuration of minizone.
It in one embodiment according to the present invention, can be by two 8 ports of support being incorporated in two subframes
CSI-RS configuration come formed support 16 ports CSI-RS configuration.For this reason, it may be necessary to the period and in the first subframe and second
Sub-frame offset between subframe carries out dominant or recessive explanation.
It is as follows to support that the CSI-RS of 16 ports configures an example for design in the case where conventional cyclic prefix:
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 indicates that resource block index in a frequency domain, t indicate subframe index, and 1≤Δ t≤T is indicated in different subframes
In 8 port of support to be combined CSI-RS configuration sub-frame offset, x indicate between different subframes configuration offset,
Configuration offset can be constant or hopping list.
In addition, design supports the CSI-RS of 12 ports to configure the following institute of an example in the case where conventional cyclic prefix
Show:
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 resource of the half in second subframe be it is not used, therefore, can will
These not used resources are used together with the CSI-RS resource in third subframe.So as to be provided in every 3 subframes
10 CSI-RS configurations, this to configure even closer.The example of CSI-RS configuration for other 5 12 ports of support is as follows
It is shown:
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)
It will lead to the density of the CSI-RS of 16 ports of support in the time domain in conjunction with the scheme configured of CSI-RS in different subframes
Feedback delay is also resulted in and for caching channel measurement to will affect the precision of channel measurement for 0.5RE/RB/Port
The complexity of user equipment.However, this influence to measurement accuracy is acceptable.Meanwhile in conjunction with CSI- in different subframes
RS configuration can also simplify the CSI-RS configuration of minizone.
It will be appreciated by those skilled in the art that also can simultaneously using 2 resource blocks on frequency domain to and time domain on 2
Subframe configures to provide 10 CSI-RS.
In one embodiment according to the present invention, can be arranged in DwPTS frame at least three support 16 ports or
The CSI-RS of 12 port of person is configured.
Not with predefined public reference signal (CRS), demodulated reference signal (DMRS) and Physical Downlink Control Channel
(PDCCH) under the premise of resource generates collision, CSI-RS can be configured without limitation in DwPTS frame.
Fig. 7 a and Fig. 7 b respectively illustrate according to embodiment of the present invention have 11 or 12 OFDM symbols
The schematic diagram of available CSI-RS resource in length and with 10 or 9 OFDM symbol length DwPTS frame.In this needle
Pair be conventional cyclic prefix mode.Meanwhile for the DwPTS frame with other OFDM symbol length, available resources
It is not enough to implement CSI-RS resource mapping.
Fig. 8 a and Fig. 8 b respectively illustrate according to embodiment of the present invention have 11 or 12 OFDM symbols
The first scheme of CSI-RS configuration in length and with 10 or 9 OFDM symbol length DwPTS frame.In the first party
In case, the CSI-RS configuration of 3 16 ports of support is nonoverlapping, and the time for different antenna ports and configuration is inclined
It moves and frequency shift (FS) is similar as much as possible.
Fig. 9 a and Fig. 9 b respectively illustrate according to embodiment of the present invention have 11 or 12 OFDM symbols
The alternative plan of CSI-RS configuration in length and with 10 or 9 OFDM symbol length DwPTS frame.In the second party
In case, does not consider the time and frequency shift, but use the pond CSI-RS as similar as possible for the DwPTS of different length configuration.
In one embodiment according to the present invention, in order to which the CSI-RS of 12 ports of construction support in DwPTS frame matches
It sets, 4 resource elements can be removed from each CSI-RS configuration for supporting 16 ports.Therefore, in a DwPTS frame, energy
Enough construct the CSI-RS configuration of 12 port of support of 4 non-overlaps.
In one embodiment according to the present invention, the OCC length in DwPTS frame can be improved to 4, or by function
Rate enhancing is improved to 9dB or 12dB.
In one embodiment according to the present invention, one can be constructed in different DwPTS frames and resource block pair
The CSI-RS of 16 ports or 12 ports is supported to configure.
In one embodiment according to the present invention, it can allow between two CSI-RS configuration in DwPTS frame
There are overlappings, and the probability of resource contention can be reduced by the way of configuration jump.
It will be appreciated by those skilled in the art that in the case that although the above embodiments are both for conventional cyclic prefix,
But the present invention is not restricted to this, can also apply in the case where extended cyclic prefix according to the method for the present invention.
Although specific embodiments of the present invention have been described above, those skilled in the art can be in appended power
Benefit makes various changes and modifications in the range of requiring.
Claims (15)
1. a kind of method for configurating channel state information reference signals in a base station, the described method comprises the following steps:
A. the configuration of at least three second class channel state information reference signals is generated；And
B. the second class channel state information reference signals configuration is distributed to be under the jurisdiction of it is three of the base station adjacent small
At least one of area；
Wherein the step A includes:
Generate at least three the second class channel state information reference signals configurations for supporting 12 ports；Or
The the second class channel state information reference signals for generating at least three 16 ports of support configure and do not increase new resource
Element.
2. the method according to claim 1, wherein the step A includes: will be multiple in single resource block pair
The configuration of the first kind channel state information reference signals of 2 ports or 4 ports or 8 ports is supported to combine, to generate at least three
The second class channel state information reference signals configuration.
3. the method according to claim 1, wherein the step A includes: multiple resource blocks in single subframe
Centering combines the configuration of the first kind channel state information reference signals of 2 ports of multiple supports or 4 ports or 8 ports, with life
At at least three second class channel state information reference signals configurations.
4. the method according to claim 1, wherein generating 10 12 ports of support in 3 resource block pairs
Channel state information reference signals configuration.
5. the method according to claim 1, wherein the step A includes: in multiple subframes by multiple supports
The configuration of the first kind channel state information reference signals of 2 ports or 4 ports or 8 ports combines, to generate described at least three
The configuration of second class channel state information reference signals.
6. according to the method described in claim 5, it is characterized in that, generating the channel of 10 12 ports of support in 3 subframes
State information reference signals configuration.
7. the method according to claim 1, wherein the step B includes any one of following sub-step:
B1. three adjacent cells are distributed into the second class channel state information reference signals configuration；
B2. by the first kind channel of the second class channel state information reference signals and 2 ports of support or 4 ports or 8 ports
State information reference signals distribute to three adjacent cells.
8. the method according to claim 1, wherein if distributing to the channel state information ginseng of adjacent cell
The resource element that signal configuration has overlapping is examined, then channel state information reference signals configuration is jumped.
9. according to the method described in claim 8, it is characterized in that, making the channel state information ginseng for distributing to adjacent cell
Signal configuration is examined to be jumped in different subframes.
10. according to the method described in claim 8, it is characterized in that, making the channel state information for distributing to adjacent cell
Reference signal configuration is jumped in the different resource blocks of single subframe.
11. the method according to any one of claim 8 to 10, which is characterized in that inform the scheme of configuration jump and use
Family equipment and adjacent base station.
12. the method according to claim 1, wherein the second class channel state information reference signals will be used for
The power enhancing of transmission is improved to 9dB or 12dB.
13. the method according to claim 1, wherein the second class channel state information reference signals are matched
The length for the superposition orthogonal code between different port set is improved to 4.
14. the method according to claim 1, wherein the step A includes: to set in descending pilot frequency time slot frame
Set at least three second class channel state information reference signals configurations.
15. according to the method for claim 14, which is characterized in that four 12 ends of support are arranged in descending pilot frequency time slot frame
The channel state information reference signals configuration of mouth.
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| CN114257283A (en) * | 2018-09-21 | 2022-03-29 | 阿里斯卡尔股份有限公司 | Channel state information reference signal |
| 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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| 3D-MIMO measurement resources and CSI process definition;CMCC;《3GPP TSG RAN WG1 Meeting #82，R1-154299》;20150828;全文 |
| Discussion on 12 and 16 port non-precoded CSI-RS design;LG Electronics;《3GPP TSG RAN WG1 Meeting #82，R1-154273》;20150828;全文 |
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