CN105322995B - Pilot sending method, channel measuring method and device in mimo system - Google Patents
Pilot sending method, channel measuring method and device in mimo system Download PDFInfo
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- CN105322995B CN105322995B CN201510104484.9A CN201510104484A CN105322995B CN 105322995 B CN105322995 B CN 105322995B CN 201510104484 A CN201510104484 A CN 201510104484A CN 105322995 B CN105322995 B CN 105322995B
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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
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
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Abstract
The invention discloses pilot tone transmission, channel measuring method and the devices in a kind of mimo system.Its pilot sending method includes: to carry out wave beam forming in the different subframes where the same pilot resources using different wave beam formed matrixes；The data and/or pilot signal for passing through wave beam forming are sent to user equipment in each subframe where pilot resources.Technical solution provided in an embodiment of the present invention, the pilot resources of configuration can be less than the quantity of wave beam formed matrix, to reduce the expense of pilot resources, and reduce pilot tone feedback overhead.
Description
This application claims in submission on July 30th, 2014 Patent Office of the People's Republic of China, application No. is 201410371543.4, invention names
The referred to as priority of the Chinese patent application of " a kind of mimo system in pilot sending method, measurement method and device " is complete
Portion's content is hereby incorporated by reference in the application.
Technical field
The present invention relates to pilot sending method, the channels in wireless communication technology field more particularly to a kind of mimo system
Measurement method and device.
Background technique
Two dimension in 3 dimension (3D) multiple-input and multiple-output (Multiple-Input Multiple-Output, MIMO) systems
Antenna structure is as shown in Figure 1.Fig. 1 show the single-polarized antenna structure of 64 antennas, wherein each cylinder figure represents a day
Line.It should be pointed out that 3D mimo system in, the antenna amount of two-dimensional antenna structure is not limited only to 64, can also be 8 antennas,
16 antennas, 32 antennas etc., and it is not limited only to single-polarized antenna structure, it can also be dual-polarized antenna structure.3D MIMO can also
To be known as full dimension (Full-Dimension, FD) MIMO.
In the 3D mimo system of two-dimensional antenna structure, wave beam forming can not be carried out only in horizontal direction, in Vertical Square
To wave beam forming can also be carried out.One typical case scene is vertical dimension sectorization.Vertical dimension fan is explained with reference to the accompanying drawing
The meaning in area.
By 16 antenna virtualizations in base station side two-dimensional antenna structure shown in Fig. 2 a at 4 antenna ports.Wherein, exist
4 antenna virtualizations of vertical dimension are at an antenna port, as shown in Figure 2 b, are divided into 3 sectors in vertical dimension and cover a height
Building.
The vertical dimension sectorization framework of antenna structure and Fig. 2 b based on Fig. 2 a, each sector configure a set of 4 port letter
Channel state information reference signal (Channel State Information-Reference Signal, CSI-RS (or cell is special
Belong to reference signal (Cell-specific Reference Signal, CRS)) resource, then needing 3 set of 4 port CSI- altogether
RS (or CRS) resource.
Process flow based on above-mentioned application scenarios is as follows:
Base station is carried out in each sector corresponding CSI-RS (or CRS) resource using different vertical beam figuration vectors
Vertical beam figuration；
User equipment (User Equipment, UE) measures each CSI-RS (or CRS) resource, and is directed to each CSI-RS
One CSI of (or CRS) resource feedback (including order instruction (Rank Indicator, RI), pre-coding matrix instruction (Pre-
Coding Matrix Indicator, PMI) and channel quality instruction (Channel Quality Indicator, CQI)), institute
To need exist for feeding back multiple CSI；
Base station selects best vertical beam figuration vector according to the multiple CSI fed back.
Different vertical waves is used when carrying out wave beam forming in the horizontal direction and in each CSI-RS (or CRS) resource
Beam figuration vector carries out vertical beam figuration.
It is above-mentioned in the prior art, using how many a wave beam forming vectors, it is necessary to how many a CSI-RS (or CRS) resources.
That is the quantity of pilot resources quantity and wave beam forming vector is correspondingly, to cause pilot resources configuration not flexible.
Summary of the invention
The object of the present invention is to provide pilot sending method, channel measuring method and the device in a kind of mimo system, with
Solve the problems, such as that pilot resources configuration is inflexible.
The purpose of the present invention is what is be achieved through the following technical solutions:
A kind of pilot sending method in mimo system, comprising:
Wave beam forming is carried out in the different subframes where the same pilot resources using different wave beam formed matrixes；
The data by wave beam forming are sent to user equipment in each subframe where the pilot resources and/or are led
Frequency signal.
Preferably, this method further include: Xiang Suoshu user equipment indicates to use in the subframe where the pilot resources
In the subframe for carrying out channel measurement.
Preferably, can be used for carrying out channel measurement in subframe where indicating from the pilot resources to the user equipment
Subframe, comprising:
It can be used for carrying out the subframe of channel measurement where indicating the pilot resources to the user equipment in subframe
Quantity.
Preferably, can be used for carrying out channel measurement in subframe where indicating from the pilot resources to the user equipment
Subframe, comprising:
Indicate that channel measurement cycle and sub-frame offset, the channel measurement cycle are pilot tone money to the user equipment
The integral multiple in the period in source.
Preferably, can be used for carrying out channel measurement in subframe where indicating from the pilot resources to the user equipment
Subframe, comprising:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction, wherein the pilot resources
The pilot signal subframe at place is divided into the subset of several subframes that can be used for carrying out channel measurement.
Preferably, can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction, comprising:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction by excitation feedback signaling.
Based on above-mentioned any means embodiment, preferably, this method further include: carry out channel survey according to the user equipment
The measurement result fed back after amount selects at least one wave beam formed matrix from used wave beam formed matrix.
Preferably, the wave beam formed matrix used in different subframes where the same pilot resources is to pass through searching loop
What the mode of the corresponding each wave beam formed matrix of the pilot resources determined.
Preferably, before the corresponding measurement result of whole wave beam formed matrix used by obtaining, the same pilot resources
The wave beam formed matrix used in the different subframes at place is by traversing the corresponding each wave beam forming square of the pilot resources
What the mode of battle array determined；
After the corresponding measurement result of whole wave beam formed matrix used by obtaining, where the same pilot resources not
With the wave beam formed matrix used in subframe for the wave beam formed matrix of selection.
It is that the quantity of the pilot resources of the user device configuration is less than used wave beam forming in the embodiment of the present invention
The quantity of matrix.Preferably, the quantity for the pilot resources of the user device configuration is 1.
Based on above-mentioned any means embodiment, preferably, the measurement result includes the user equipment in the predetermined time
The measured value of channel measurement is carried out in section to each subframe where each pilot resources.
A kind of channel measuring method in mimo system, comprising:
Pilot measurement is carried out on pilot resources, wherein using difference in the different subframes where the same pilot resources
Wave beam formed matrix carry out wave beam forming；
Feedback carries out the measurement result of channel measurement.
Preferably, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
Preferably, carrying out pilot measurement on pilot resources, comprising:
It is determined in the subframe where pilot resources according to the channel measurement subframe instruction information received for carrying out channel
The subframe of measurement, the channel measurement subframe, which is used to indicate in the subframe where the pilot resources, can be used for carrying out channel survey
The subframe of amount；
Channel measurement is carried out in determining subframe.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
The subframe of row channel measurement, comprising:
According to the instruction information of the quantity for the subframe that can be used for carrying out channel measurement in subframe where the pilot resources,
It determines in the subframe where pilot resources for carrying out the subframe of channel measurement.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
The subframe of row channel measurement, comprising:
It is determined according to the channel measurement cycle and sub-frame offset that receive in the subframe where pilot resources for carrying out letter
The subframe of road measurement, the channel measurement cycle are the integral multiple in the period of the pilot resources.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
The subframe of row channel measurement, comprising:
Pilot resources institute is determined according to the instruction information of the subset of the subframe that can be used for carrying out channel measurement received
Subframe in for carrying out the subframe of channel measurement, wherein the pilot signal subframe where the pilot resources is divided into
The subset of several subframes that can be used for carrying out channel measurement.
Preferably, the instruction information of the subset of the subframe that can be used for carrying out channel measurement is carried in excitation feedback letter
In order.
A kind of means for channel measurement in mimo system, comprising:
Wave beam forming module, for using different wave beam formed matrixes in the different subframes where the same pilot resources
Carry out wave beam forming；
Pilot signal sending module passes through for sending in each subframe where the pilot resources to user equipment
The data and/or pilot signal of wave beam forming.
Preferably, further including configuration module, it is used for:
It can be used for carrying out the subframe of channel measurement in subframe where indicating from the pilot resources to the user equipment.
Preferably, the configuration module is used for:
It can be used for carrying out the subframe of channel measurement where indicating the pilot resources to the user equipment in subframe
Quantity.
Preferably, the configuration module is used for:
Indicate that channel measurement cycle and sub-frame offset, the channel measurement cycle are pilot tone money to the user equipment
The integral multiple in the period in source.
Preferably, the configuration module is used for:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction, wherein the pilot resources
The pilot signal subframe at place is divided into the subset of several subframes that can be used for carrying out channel measurement.
Preferably, when the subset for the subframe that can be used for carrying out channel measurement to user equipment instruction, the configuration
Module is used for:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction by excitation feedback signaling.
Preferably, further including wave beam formed matrix selecting module, after carrying out channel measurement according to the user equipment
The measurement result of feedback selects at least one wave beam formed matrix from used wave beam formed matrix.
Preferably, the wave beam formed matrix used in different subframes where the same pilot resources is to pass through searching loop
What the mode of the corresponding each wave beam formed matrix of the pilot resources determined.
Preferably, before the corresponding measurement result of whole wave beam formed matrix used by obtaining, the same pilot resources
The wave beam formed matrix used in the different subframes at place is by traversing the corresponding each wave beam forming square of the pilot resources
What the mode of battle array determined；
After the corresponding measurement result of whole wave beam formed matrix used by obtaining, where the same pilot resources not
With the wave beam formed matrix used in subframe for the wave beam formed matrix of selection.
It is that the quantity of the pilot resources of the user device configuration is less than used wave beam forming in the embodiment of the present invention
The quantity of matrix.Preferably, the quantity for the pilot resources of the user device configuration is 1.
Based on above-mentioned any device embodiment, preferably, the measurement result includes the user equipment in the predetermined time
The measured value of channel measurement is carried out in section to each subframe where each pilot resources.
A kind of base station, comprising:
Processor, the processor are configured as executing the computer program for having following function: being assigned using different wave beams
Shape matrix carries out wave beam forming in the different subframes where the same pilot resources；In each subframe where pilot resources to
User equipment sends the data and/or pilot signal for passing through wave beam forming；
Memory, the memory are configured as saving the code of above-mentioned computer program.
Preferably, the processor is additionally configured to execute the computer program for having following function: Xiang Suoshu user equipment
Indicate the subframe that can be used for carrying out channel measurement in the subframe where the pilot resources.
Preferably, can be used for carrying out channel measurement in subframe where indicating from the pilot resources to the user equipment
Subframe when, which, which is additionally configured to execute, has the computer program of following function: Xiang Suoshu user equipment indicates institute
It can be used for carrying out the quantity of the subframe of channel measurement where stating pilot resources in subframe.
Preferably, can be used for carrying out channel measurement in subframe where indicating from the pilot resources to the user equipment
Subframe when, which, which is additionally configured to execute, has the computer program of following function: Xiang Suoshu user equipment instruction letter
Road measurement period and sub-frame offset, the channel measurement cycle are the integral multiple in the period of the pilot resources.
Preferably, can be used for carrying out channel measurement in subframe where indicating from the pilot resources to the user equipment
Subframe when, which, which is additionally configured to execute, has the computer program of following function: the instruction of Xiang Suoshu user equipment can
With the subset of the subframe for carrying out channel measurement, wherein if the pilot signal subframe where the pilot resources is divided into
The subset of the dry subframe that can be used for carrying out channel measurement.
Preferably, when the subset for the subframe that can be used for carrying out channel measurement to user equipment instruction, the processor
It is additionally configured to execute and has the computer program of following function: can be with to user equipment instruction by excitation feedback signaling
For carrying out the subset of the subframe of channel measurement.
Preferably, the processor is additionally configured to execute the computer program for having following function: being set according to the user
The standby measurement result feed back after channel measurement, selects at least one wave beam forming square from used wave beam formed matrix
Battle array.
Preferably, the wave beam formed matrix used in different subframes where the same pilot resources is to pass through searching loop
What the mode of the corresponding each wave beam formed matrix of the pilot resources determined.
Preferably, before the corresponding measurement result of whole wave beam formed matrix used by obtaining, the same pilot resources
The wave beam formed matrix used in the different subframes at place is by traversing the corresponding each wave beam forming square of the pilot resources
What the mode of battle array determined；
After the corresponding measurement result of whole wave beam formed matrix used by obtaining, where the same pilot resources not
With the wave beam formed matrix used in subframe for the wave beam formed matrix of selection.
Wherein, the number of used wave beam formed matrix is less than for the quantity of the pilot resources of the user device configuration
Amount.Preferably, the quantity for the pilot resources of the user device configuration is 1.
Based on above-mentioned any base station embodiment, preferably, the measurement result includes the user equipment in the predetermined time
The measured value of channel measurement is carried out in section to each subframe where each pilot resources.
A kind of means for channel measurement in mimo system, comprising:
Pilot measurement module, for carrying out pilot measurement on pilot resources, wherein where the same pilot resources not
Wave beam forming is carried out using different wave beam formed matrixes in subframe；
Measurement feedback module, for feeding back the measurement result for carrying out channel measurement.
Preferably, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
Preferably, the pilot measurement module is used for:
It is determined in the subframe where pilot resources according to the channel measurement subframe instruction information received for carrying out channel
The subframe of measurement, the channel measurement subframe, which is used to indicate in the subframe where the pilot resources, can be used for carrying out channel survey
The subframe of amount；
Channel measurement is carried out in determining subframe.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
When the subframe of row channel measurement, the pilot measurement module is used for:
According to the instruction information of the quantity for the subframe that can be used for carrying out channel measurement in subframe where the pilot resources,
It determines in the subframe where pilot resources for carrying out the subframe of channel measurement.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
When the subframe of row channel measurement, the pilot measurement module is used for:
It is determined according to the channel measurement cycle and sub-frame offset that receive in the subframe where pilot resources for carrying out letter
The subframe of road measurement, the channel measurement cycle are the integral multiple in the period of the pilot resources.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
When the subframe of row channel measurement, the pilot measurement module is used for:
Pilot resources institute is determined according to the instruction information of the subset of the subframe that can be used for carrying out channel measurement received
Subframe in for carrying out the subframe of channel measurement, wherein the pilot signal subframe where the pilot resources is divided into
The subset of several subframes that can be used for carrying out channel measurement.
Preferably, the instruction information of the subset of the subframe that can be used for carrying out channel measurement is carried in excitation feedback letter
In order.
A kind of user equipment, comprising:
Processor, the processor are configured as executing the computer program for having following function: carrying out on pilot resources
Pilot measurement, wherein wave beam tax is carried out using different wave beam formed matrixes in the different subframes where the same pilot resources
Shape；Feedback carries out the measurement result of channel measurement；
Memory, the memory are configured as saving the code of above-mentioned computer program.
Preferably, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
Preferably, when carrying out pilot measurement on pilot resources, the processor is configured to executing following calculation machine journey
Sequence: it is determined in the subframe where pilot resources according to the channel measurement subframe instruction information received for carrying out channel measurement
Subframe, the channel measurement subframe are used to indicate the son that can be used for carrying out channel measurement in the subframe where the pilot resources
Frame；
Channel measurement is carried out in determining subframe.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
When the subframe of row channel measurement, the processor is configured to executing following calculation machine program: according to where the pilot resources
The instruction information that can be used for carrying out the quantity of the subframe of channel measurement in subframe is determined and is used in the subframe where pilot resources
Carry out the subframe of channel measurement.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
When the subframe of row channel measurement, the processor is configured to executing following calculation machine program:
It is determined according to the channel measurement cycle and sub-frame offset that receive in the subframe where pilot resources for carrying out letter
The subframe of road measurement, the channel measurement cycle are the integral multiple in the period of the pilot resources.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
When the subframe of row channel measurement, the processor is configured to executing following calculation machine program: can be used for according to what is received
The instruction information for carrying out the subset of the subframe of channel measurement determines to be used to carry out channel measurement in subframe where pilot resources
Subframe, wherein the pilot signal subframe where the pilot resources is divided into several sons that can be used for carrying out channel measurement
The subset of frame.
Preferably, the instruction information of the subset of the subframe that can be used for carrying out channel measurement is carried in excitation feedback letter
In order.
In each embodiment of the present invention, a kind of special circumstances of wave beam formed matrix are wave beam forming vectors.
Technical solution provided in an embodiment of the present invention is suitable for vertical beam figuration, is also applied for horizontal beam figuration.This
Inventive embodiments, it is enterprising in the different subframes where the same pilot resources using different horizontal or vertical wave beam formed matrixes
Row wave beam forming, therefore, can flexible configuration pilot resources according to actual needs quantity, to meet actual transmissions demand,
Improve system performance.For example, the pilot resources of configuration can be less than horizontal or vertical wave beam formed matrix, led so as to reduce
The expense of frequency resource.Due to reducing pilot resources, the pilot tone feedback overhead of UE decreases.If only configuring one
Pilot resources, then pilot-frequency expense and pilot tone feedback overhead will greatly reduce.
In addition, can be used for carrying out the subframe of channel measurement from base station to UE instruction in the embodiment of the present invention, can control
UE carries out channel measurement according to using the subframe of the same wave beam formed matrix, to improve scheduling accuracy and system performance.
Detailed description of the invention
Fig. 1 is the two-dimensional antenna structural schematic diagram in 3D mimo system；
Fig. 2 a is that antenna port divides schematic diagram in 3D mimo system；
Fig. 2 b is vertical dimension sectorization schematic diagram in 3D mimo system；
Fig. 3 is a kind of method flow diagram provided in an embodiment of the present invention；
Fig. 4 is provided in an embodiment of the present invention by exciting feedback signaling to can be used for carrying out channel measurement to UE instruction
The schematic diagram of the subset of subframe；
Fig. 5 is another method flow diagram provided in an embodiment of the present invention；
Fig. 6 is a kind of vertical beam figuration schematic diagram provided in an embodiment of the present invention；
Fig. 7 is another vertical beam figuration schematic diagram provided in an embodiment of the present invention；
Fig. 8 is a kind of schematic device provided in an embodiment of the present invention；
Fig. 9 is base station schematic diagram provided in an embodiment of the present invention；
Figure 10 is another schematic device provided in an embodiment of the present invention；
Figure 11 is user equipment schematic diagram provided in an embodiment of the present invention.
Specific embodiment
Technical solution provided in an embodiment of the present invention be applied to mimo system, the mimo system can with but be not limited only to be
3D/FD mimo system is also possible to other mimo systems.
Below in conjunction with attached drawing, technical solution provided in an embodiment of the present invention is described in detail.
Method provided in an embodiment of the present invention network side implementation as shown in figure 3, specifically including following operation:
Step 300, using different wave beam formed matrixes in the enterprising traveling wave of different subframes where the same pilot resources
Beam figuration.
Wherein, pilot resources are made of one group of running time-frequency resource, these running time-frequency resources are distributed in different subframes.Therefore, it leads
Subframe where frequency resource refers to the subframe where one group of running time-frequency resource for constituting pilot resources.
Step 310 sends the data and/or pilot tone for passing through wave beam forming in each subframe where pilot resources to UE
Signal, so that UE carries out channel measurement.
In each embodiment of the present invention, pilot signal can with but be not limited only to be CSI-RS, CRS etc..
Above-mentioned treatment process can with but be not limited only to be realized by base station.
Above-mentioned treatment process is suitable for wave beam forming and adjusts in the dynamic of vertical direction, is of course also apply to wave beam forming and exists
The dynamic of horizontal direction adjusts.
Technical solution provided in an embodiment of the present invention is led using different horizontal or vertical wave beam formed matrixes same
Carry out wave beam forming in different subframes where frequency resource, therefore, can flexible configuration pilot resources according to actual needs number
Amount improves system performance to meet actual transmissions demand.For example, in the prior art, if there is P vertical beam figuration to
Amount, it is necessary to divide P sector in vertical dimensions, and configure P pilot resources, cause CSI-RS expense excessive.And it is of the invention
The pilot resources of the scheme that embodiment provides, configuration can be less than horizontal or vertical wave beam formed matrix, to reduce pilot tone
The expense of resource.Due to reducing pilot resources, the pilot tone feedback overhead of UE decreases.Similarly, if it is using wave
Beam figuration matrix carries out wave beam forming to the resource for channel measurement, and pilot resources expense is small, and the pilot tone feedback of UE is opened
Sell small.
Preferably, being less than the quantity of used wave beam formed matrix for the quantity of the pilot resources of user device configuration.
If only configuring a pilot resources, pilot-frequency expense will be greatly reduced.
Preferably, the data and/or pilot tone for passing through wave beam forming are sent to UE in the subframe where each pilot resources
After signal, the measurement result fed back after channel measurement is carried out according to the UE, is selected from above-mentioned used wave beam formed matrix
Select at least one wave beam formed matrix.
Specifically, being to select at least one wave beam formed matrix according to the descending of the measured value in measurement result.
In the embodiment of the present invention, measurement result can with but be not limited only to be Reference Signal Received Power (Reference
Signal Receiving Power, RSRP) and/or Reference Signal Received Quality (Reference Signal Receiving
Quality, RSRQ) measured value.Correspondingly, selecting at least one wave beam forming according to the descending of RSRP and/or RSRQ measured value
Matrix.The quantity of the wave beam formed matrix of selection can configure according to actual needs, and this is not limited by the present invention.
In above-mentioned steps 300, the determination of the wave beam formed matrix used in the different subframes where the same pilot resources
There are many modes, preferably, being determined by way of traversing the corresponding each wave beam formed matrix of the pilot resources.Its
In, the specific implementation of traversal, which can be, in a predetermined sequence traverses each wave beam formed matrix, is also possible to
Randomly selected mode traverses each wave beam formed matrix.
By taking vertical beam figuration matrix as an example, it is assumed that have 4 vertical beam figuration matrix { V1, V2, V3, V4, it is configured with one
A pilot resources, the period of the pilot resources are n subframe.If in a predetermined sequence to each vertical beam figuration matrix
It is traversed, it is assumed that the scheduled sequence is V1, V2, V3, V4, in the subframe N where pilot resources, using V1Carry out vertical beam
Figuration, then, in subframe N+n, using V2Vertical beam figuration is carried out, in subframe N+2n, using V3Vertical beam figuration is carried out,
In subframe N+3n, using V4Carry out vertical beam figuration；If it is searching loop, in subframe N+4n, using V1Carry out vertical beam
Figuration, and so on.Each vertical beam figuration matrix is traversed if it is randomly selected mode, it is assumed that provided in pilot tone
Subframe N where source, at random from { V1, V2, V3, V4In (such as the V of selection one2) vertical beam figuration is carried out, then, in subframe
N+n, at random from { V1, V3, V4In (such as the V of selection one3) vertical beam figuration is carried out, in subframe N+2n, at random from { V1, V4}
Middle (such as the V of selection one1) carry out carrying out vertical beam figuration, in subframe N+3n, using V1Carry out vertical beam figuration；If
It is to loop through, in subframe N+4n, at random from { V1, V2, V3, V4One progress vertical beam figuration of middle selection, and so on.
Still by taking vertical beam figuration matrix as an example, it is assumed that have 4 vertical beam figuration matrix { V1, V2, V3, V4, it is configured with
Two pilot resources, the period of a pilot resources are n subframe, the corresponding { V of the pilot resources1,V2, another pilot resources
Period be m subframe, the pilot resources correspondence { V3, V4}.It should be pointed out that the corresponding vertical beam figuration of pilot resources
The specific method of salary distribution of matrix can be non-limiting according to being only for example using need to adjust herein.If according to scheduled suitable
The each vertical beam figuration matrix of ordered pair is traversed, it is assumed that for { V1, V2, the sequence set is V1, V2, for { V3,
V4, the sequence set is V3, V4, it is the subframe N where the pilot resources of n subframe in the period, using V1Carry out vertical wave
Beam figuration, then, in subframe N+n, using V2Vertical beam figuration is carried out, in subframe N+2n, using V1Carry out vertical beam tax
Shape, and so on；Subframe M where being the pilot resources of m subframe in the period, using V3Vertical beam figuration is carried out, then,
In subframe M+m, using V4Vertical beam figuration is carried out, in subframe M+2m, using V3Vertical beam figuration is carried out, and so on.Such as
Fruit is that randomly selected mode traverses each vertical beam figuration matrix, it is assumed that in the pilot tone money that the period is n subframe
Subframe N where source, at random from { V1, V2In (such as the V of selection one2) vertical beam figuration is carried out, then, in subframe N+n,
Using V1Vertical beam figuration is carried out, in subframe N+2n, at random from { V1, V2In (such as the V of selection one2) carry out vertical beam
Figuration, and so on；Subframe M where being the pilot resources of m subframe in the period, at random from { V3, V4One (example of middle selection
Such as V3) vertical beam figuration is carried out, then, in subframe M+m, using V4Carry out vertical beam figuration, in subframe M+2m, at random from
{V3, V4In (such as the V of selection one3) vertical beam figuration is carried out, and so on.
It should be pointed out that above-mentioned is only the wave beam forming used in different subframes where the determining same pilot resources
The preferred embodiment of matrix.The embodiment of the present invention is not precluded determine the same pilot resources by other means where not
With the wave beam formed matrix used in subframe.For example, for each subframe where pilot resources, it is corresponding from the pilot resources
All wave beam formed matrixes in randomly choose wave beam formed matrix；Alternatively, every two adjacent subframe uses same wave
Beam figuration matrix etc., does not enumerate herein.
Further, before the corresponding measurement result of whole wave beam formed matrix used by obtaining, the same pilot tone money
The wave beam formed matrix used in different subframes where source is by traversing the corresponding each wave beam forming of the pilot resources
What the mode of matrix determined；After the corresponding measurement result of whole wave beam formed matrix used by obtaining, the same pilot tone money
The wave beam formed matrix used in different subframes where source is the wave beam formed matrix of selection.
The corresponding measurement result of wave beam formed matrix measures the subframe using the wave beam formed matrix
Measurement result.
Based on above-mentioned any means embodiment, above-mentioned measurement result includes above-mentioned UE within a predetermined period of time to each pilot tone
All or part of subframe where resource carries out the measured value of channel measurement.Wherein, measured value can with but be not limited only to be following
The measured value of at least one: CSI, RSRP, RSRQ etc..UE both can be with periodic feedback measured value, can also be anti-with aperiodicity
Present measured value.By taking periodic feedback measured value as an example, UE, which can concentrate the measured value in each period, to be fed back.It should be understood that
It is that UE can also use other feedback systems, for example, fed back respectively for each subframe where each pilot resources,
Etc..
It, can be with selecting after selecting at least one wave beam formed matrix based on above-mentioned any means embodiment
Wave beam formed matrix solves other problems, such as carries out the wave beam forming of 3D/FD MIMO, precoding etc..
For using the wave beam forming for selecting at least one wave beam formed matrix progress 3D/FD MIMO, led above-mentioned
Frequency resource is known as the first pilot resources, and base station configuration is also configured at least one second pilot resources, and corresponding implementation can
To be: the pilot tone letter at least one second pilot resources configured using at least one wave beam formed matrix of selection to base station
Number carry out wave beam forming (i.e. using selection at least one wave beam formed matrix to be sent to above-mentioned UE downlink signal carry out wave
Beam figuration)；The pilot signal for passing through wave beam forming is sent at least one second pilot resources of base station configuration.
There are many implementations for carrying out wave beam forming on the second pilot resources using the wave beam formed matrix of selection, this
Invention can not enumerate, and be only illustrated with several preferred embodiments.
Assuming that a base station selected wave beam formed matrix, then using this wave beam formed matrix of selection to the second pilot tone
Resource carries out wave beam forming.UE is measured on the second pilot resources, and feedback measurement.The measurement knot fed back according to UE
Fruit carries out wave beam forming on 3D/FD mimo antenna array, does not need to carry out for the wave beam forming of 3D/FD mimo antenna array
Further processing.
Assuming that base station is configured with two the second pilot resources, and base station selected two wave beam formed matrixes, then base station point
Wave beam formed matrix that Cai Yong be not different carries out wave beam forming to different second pilot resources.UE is respectively in the two the second pilot tones
It is measured in resource, and feeds back the measurement result measured on the two second pilot resources.According to UE respectively to the two
The feedback result that second pilot resources measure selects the beamforming scheme of 3D/FD mimo antenna array.
The definition of traditional C/S I is that a CSI feedback must correspond to a CSI reference resources (reference
Resource), CSI reflects the quality/power for the channel that UE can be observed above CSI reference resource.When
On domain, a CSI reference resource corresponds to a subframe (subframe), referred to as CSI reference
Resource subframe, it can not also include CSI-RS that CSI reference resource subframe, which may include CSI-RS,.It is passing
It unites in the definition of 3GPP LTE, CSI is defined as follows: if the CSI that eNB is reported with UE is in CSI reference resource
On be used directly to scheduling do data transmission, then UE must receive the solution that data obtain on CSI reference resource
BLER (block error rate) is adjusted to be no more than 10%.If sub-frame of uplink n is the sub-frame of uplink of CSI feedback, downlink subframe
N-k is CSIreference resource subframe, meets the requirement that BLER is no more than 10%, wherein n and k is whole
Number.CSI reference resource subframe is not necessarily the subframe comprising CSI-RS.For UE realization, UE should
Using before CSI reference resource subframe or being no earlier than the N number of of CSI reference resource subframe
CSI-RS subframe progress channel measurement (N >=1), for obtaining the channel estimation on CSI reference resource.N
It is the number for the CSI-RS subframe that UE is measured in CSI feedback each time, there is UE oneself decision in existing system, network does not have
The information of the number is also unable to control the number.It includes CSI-RS's that network, which is also unable to control UE using which, in existing system
Subframe carries out channel estimation.Wherein, CSI reference resource subframe and CSI-RS subframe are CSI reference
Subframe where resource, CSI-RS subframe are the subframes including CSI-RS.
In the embodiment of the present invention, as the difference where the same pilot resources (such as CSI reference resource)
Subframe uses different wave beam formed matrixes.The wave beam formed matrix that two subframes use is different, then corresponds to after wave beam forming
Different channel conditions, if UE determines the measurement result of the pilot resources according to the measurement result in the two subframes, in this way
The measurement result of determining pilot resources can not accurately correspond to the used wave beam forming square of any of the two subframes
Battle array then selects wave beam formed matrix according to the measurement result of UE feedback, and the wave beam formed matrix of selection cannot not only bring gain,
It may be decreased scheduling accuracy and system performance instead.To avoid such case, the embodiment of the present invention provides following solve
Scheme.
It can be used for carrying out the subframe of channel measurement in subframe where indicating from above-mentioned pilot resources to user equipment.
Above-mentioned solution can cooperate with the scheme of above-mentioned any embodiment to be implemented.Separately below to this solution
It is described in detail.
Above-mentioned solution defines the CSI fed back in each sub-frame of uplink, and UE must use one group of CSI- determined
RS subframe is to its channel measurement.Wherein, one group of CSI-RS subframe is made of at least one CSI-RS subframe.Due to
The CSI of each uplink feedback corresponds to the CSI reference resource of a downlink, is also equivalent to each here
What CSI reference resource, UE must use a group or a determination includes CSI-RS subframe to its channel
Measurement.
In the embodiment of the present invention, it can be used for carrying out the subframe of channel measurement from base station to UE instruction, can control UE root
Channel measurement is carried out according to using the subframe of the same wave beam formed matrix, to improve scheduling accuracy and system performance.
It can be used for carrying out the one of the subframe of channel measurement in subframe where indicating from above-mentioned pilot resources to user equipment
Kind implementation may is that the son for indicating to can be used for carrying out channel measurement where above-mentioned pilot resources in subframe to user equipment
The quantity (i.e. above-mentioned N) of frame.Since user equipment and network side are for feeding back the subframe and CSI reference of CSI
The corresponding relationship of resource subframe is reached an agreement, therefore, can be in subframe where indicating above-mentioned pilot resources to user equipment
It is that can be used in the subframe where indicating above-mentioned pilot resources to user equipment for carrying out the quantity of the subframe of channel measurement
In the subframe for carrying out channel measurement.
For example, it is late for can carrying out the subframe (CSI-RS subframe) of channel measurement if the value of above-mentioned N is 1
In the subframe comprising CSI-RS of CSI reference resource.If CSI reference resource subframe itself
It is exactly a CSI-RS subframe, then the CSI-RS subframe can be used, CSI reference resource is measured.Such as
Fruit CSI reference resource subframe itself does not include CSI-RS, then CSI reference resource can be used
A CSI-RS subframe before subframe the latest measures.Correspondingly, the processing step of UE and eNB is as follows.According to CSI feedback
Subframe, UE obtains CSI-reference resource subframe, and then UE obtains being no earlier than CSI-reference-
The CSI-RS subframe of resource, UE carry out channel measurement to the CSI-RS subframe.ENB and UE has the reason of unified sequential relationship
Solution, then can be according to the subframe of CSI feedback, which vertical dimensions wave beam forming the CSI for being inferred to UE feedback is directed to.If N >
1, then when UE is measured for some CSI reference resource, maximum can carry out in N number of subframe
Measurement.
Wherein, can be used in subframe where base station can indicate above-mentioned pilot resources to user equipment by high-level signaling
Carry out the quantity of the subframe of channel measurement.
For periodic CSI feedback, no matter whether base station indicates above-mentioned value N, indicates above-mentioned pilot tone to user equipment
The subframe that can be used for carrying out channel measurement in subframe where resource can also be by indicating channel measurement week to user equipment
Phase and sub-frame offset are realized, wherein channel measurement cycle is the period integral multiple of above-mentioned pilot resources.For example, it is assumed that CSI-RS
Resource period is 10ms, and eNB high level has 4 vertical dimensions wave beam formed matrixes, is provided by the way of poll in each CSI-RS
In the period of source, using a vertical dimensions wave beam formed matrix, then UE is when carrying out channel averagely, it should in interval 40ms
CSI-RS subframe on to carry out channel average.
Wherein, base station can indicate channel measurement cycle and sub-frame offset by high-level signaling.
It can be used for carrying out the another of the subframe of channel measurement in subframe where indicating from above-mentioned pilot resources to user equipment
A kind of implementation may also is that the subset that can be used for carrying out the subframe of channel measurement to user equipment instruction, wherein pilot tone
Pilot signal subframe where resource is divided into the subset of several subframes that can be used for carrying out channel measurement.
Wherein, base station can be used for carrying out the son of the subframe of channel measurement by high-level signaling to user equipment instruction
Collection.
In the aperiodic CSI feedback of tradition, a CSI fed back in subframe n corresponds to a CSI in timing
Reference resource (reference resources), CSI reference resource correspond to subframe n- in timing
K, k is a positive integer here.Aperiodic CSI feedback will have PDCCH excitation (trigger): UE to receive eNB transmission
After PDCCH, CSI is fed back in corresponding PUSCH uplink subframe.The reference resource of CSI can be PDCCH
The subframe of transmission, some subframe being also possible to before PDCCH subframe, sequential relationship should be explicitly defined in the two sides eNB/UE.
To with the CSI of non-periodic feedback, the calculation of this CSI reference resource is equally possible, for example eNB is sent
One PDCCH excites CSI feedback, and according to the sub-frame of uplink of CSI feedback, CSI reference can be calculated in eNB
The subframe of resource, so the CSI of each PDCCH excitation determines the vertical dimensions wave beam forming for corresponding to a downlink
Matrix.Alternatively, in PDCCH which CSI reference can be should correspond to by signaling the CSI of UE feedback
Resource subframe.For example, eNB configures one it is assumed that eNB has 4 wave beam formed matrixes in vertical dimensions
CSI-RS resource uses four different vertical dimensions wave beams in four different downlink subframes；Then eNB is in downlink PDCCH
In the domain (field) of a new 2-bit can be added, which this field notice UE should use in the subframe of uplink feedback
One CSI reference resource subframe measures CSI, for example 2-bit field is 1, then measure/feed back PDCCH
First CSI reference resource subframe before frame measures/feeds back PDCCH if 2-bit field is 2
Second CSI reference resource subframe before frame, etc..
As an example, it is assumed that there are four vertical dimensions wave beam formed matrixes by eNB, configure a CSI-RS money to UE
The period in source, CSI-RS resource is 10ms, and eNB uses four wave beam forming squares in the different cycles of a CSI-RS resource respectively
Battle array traversal figuration is then 40ms corresponding to the actual cycle of the CSI-RS subframe of some particular beam figuration matrix, in order to control
UE processed measures and feeds back CSI without using the CSI-RS period for corresponding to different beams figuration matrix when measuring CSI,
Then eNB needs certain mechanism control UE and carries out channel in which downlink CSI-RS subframe for a uplink CSI feedback
Measurement.Here there is several possible solution.As a kind of scheme, for a CSI feedback process, eNB can configure fair
Perhaps UE is used to carry out the period P1 of the CSI-RS subframe of channel measurement, for example P1=40ms, this period can provide than CSI-RS
The period P (such as P=10ms) in source will be grown, and may only use the CSI-RS's for being allocated to channel measurement when UE feeds back CSI
The subframe of actual cycle P1.This mode is relatively specific for periodic feedback CSI.For example UE needs to send in sub-frame of uplink n
CSI, CSI reference resource correspond to downlink subframe n-k, k >=0, then UE must use be not later than CSI
The subframe that the period comprising CSI-RS of reference resource is P1 carries out channel measurement.In addition, eNB can also pass through
High-rise semi-static signaling either dynamic signaling configuration UE is used to measure the quantity N for the CSI-RS subframe that channel uses, then UE is anti-
When presenting a CSI, it may only be measured with not more than N number of CSI-RS subframe.Both the above method can also cooperate reality
It applies, for example eNB can configure UE and be measured using the CSI that actual cycle is P1=40ms, each CSI measurement UE only allows to make
Be no more than N=2 CSI-RS subframe, then UE in actual measurement CSI should use be not later than CSI reference
The subframe that not more than 2 periods of resource are P1=40ms measures.In addition, CSI-RS subframe can be divided by eNB
Several groups of subframe subsets are allocated to UE, and for a CSI feedback, eNB configures UE and which subframe subset to carry out CSI measurement using.
This mode is suitable for periodical CSI feedback, is also applied for aperiodicity feedback.
Alternatively example, CSI-RS subframe can be divided into four groups of subframe subsets and be allocated to UE by eNB, for one
CSI feedback, the 2-bit trigger field configuration UE in PDCCH carry out CSI measurement using which subframe subset, such as
2-bit field is 1, then measures the CSI-RS subframe of subframe where being not later than PDCCH in first CSI-RS subframe subset, such as
Fruit 2-bit field is 2, then measures the CSI-RS subframe of subframe where being not later than PDCCH in second CSI-RS subframe subset.
Method provided in an embodiment of the present invention the side UE implementation as shown in figure 5, specifically including following operation:
Step 500 carries out pilot measurement on pilot resources, wherein in the different subframes where the same pilot resources
Wave beam forming is carried out using different wave beam formed matrixes；
Step 510, feedback carry out the measurement result of channel measurement.
There is technical characteristic identical with network side in the implementation of the side UE, details are not described herein again.
Preferably, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
Preferably, step 500 includes: where indicating that information determines pilot resources according to the channel measurement subframe received
For carrying out the subframe of channel measurement in subframe, the channel measurement subframe is used to indicate in the subframe where the pilot resources
It can be used for carrying out the subframe of channel measurement；
Channel measurement is carried out in determining subframe.
It is determined in the subframe where pilot resources according to the channel measurement subframe instruction information received for carrying out channel
The subframe of measurement, comprising:
According to the instruction information of the quantity for the subframe that can be used for carrying out channel measurement in subframe where the pilot resources,
It determines in the subframe where pilot resources for carrying out the subframe of channel measurement.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
The subframe of row channel measurement, comprising:
It is determined according to the channel measurement cycle and sub-frame offset that receive in the subframe where pilot resources for carrying out letter
The subframe of road measurement, the channel measurement cycle are the period integral multiple of the pilot resources.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
The subframe of row channel measurement, comprising:
Pilot resources institute is determined according to the instruction information of the subset of the subframe that can be used for carrying out channel measurement received
Subframe in for carrying out the subframe of channel measurement, wherein the pilot signal subframe where the pilot resources is divided into
The subset of several subframes that can be used for carrying out channel measurement.
Preferably, the instruction information of the subset of the subframe that can be used for carrying out channel measurement is carried in excitation feedback letter
In order.
Below in 3D mimo system, base station and the cooperation of the side UE are implemented for realizing vertical beam figuration, to of the invention real
The technical solution for applying example offer is illustrated.
Base station configures a CSI-RS resource to UE, and is sent the configuration information of the CSI-RS resource by high-level signaling
The UE is given, the period of sub-frame and sub-frame offset of the CSI-RS resource are included at least in the configuration information.
Subframe (subframe i.e. where CSI-RS resource) is sent in different CSI-RS, base station uses the CSI-RS of transmission
Different vertical beam figuration matrixes carries out vertical beam figuration.Each CSI-RS sends used vertical beam in subframe and assigns
Shape matrix is determined from all vertical beam figuration matrixes in base station using the method for traversal.Although UE is only configured one as a result,
A CSI-RS resource, but among the different subframes where the CSI-RS resource, after UE can measure different vertical wave beam forming
Channel status.
It is right in time that UE periodically or aperiodically feeds back CSI and/or RSRP, each CSI and/or RSRP feedback
An individual subframe is answered, subframe is individually sent using CSI-RS after vertical beam figuration also for one.As a result, according to UE
Send back the CSI and/or RSRP come, the available signal strength and channel parameter for after different vertical wave beam forming in base station
Information.Base station is according to the information, it can be determined that best vertical beam figuration matrix.
Assuming that base station can choose there are four vertical beam figuration matrix { V1, V2, V3, V4 }.As shown in fig. 6, in CSI-
RS sends subframe N, and base station, to CSI-RS figuration, sends subframe N+a+b in CSI-RS, CSI-RS is assigned using V2 in base station using V1
Shape, by parity of reasoning.Subframe N is sent in CSI-RS, UE measures the CSI-RS of corresponding vertical beam figuration matrix V 1, then in subframe
It is fed back in N+a.Wherein, a and b is no less than 0 integer, and a+b >=1.It is further noted that example shown in Fig. 6
In, feedback is all a subframe progress after CSI-RS transmission, but in systems in practice, feedback subframe is corresponding with its
The interval that CSI-RS is sent between subframe can change.For example different CSI-RS sends subframe and corresponding feedback subframe
Time interval can be different.About feedback configuration, each CSI and/or RSRP is periodic feedback in Fig. 6.In reality
In the system of border, each CSI and/or RSRP can also be enabled to feed back using aperiodicity, or can also enable certain CSI and/or
RSRP is configured as periodic feedback, other CSI and/or RSRP are configured as aperiodicity feedback, by base station needs when
Wait excitation.For the CSI and/or RSRP of periodic feedback, the period and sub-frame offset etc. of each CSI and/or RSRP feedback
It can be with separate configurations.Measurement result alternatively, it is also possible to which multiple CSI-RS are sent subframe is placed in the same feedback subframe instead
Feedback, Physical Uplink Control Channel (PUCCH) or use Physical Uplink Shared Channel (PUSCH) using larger capacity.It should
, it is noted that the example in Fig. 6 is only a kind of possible example, the key point of the embodiment of the present invention is, although base station is to UE
It is configured with a CSI-RS resource, by sending in subframe in different CSI-RS using different vertical in the CSI-RS resource
Wave beam formed matrix, UE can report the information (CSI and/or RSRP) corresponding to different vertical dimensions wave beam formed matrixes, make
Base station is obtained to obtain corresponding to the channel information after different vertical wave beam forming.
Above-mentioned treatment process is illustrated by taking vertical beam figuration as an example, and method of the invention can be equally used for horizontal wave
Beam figuration, method is identical, repeats no more.
It can be seen that base station obtains completely for all vertical beam figuration matrixes at the end subframe N+4a+3b
Measurement result information.Base station is it is possible thereby to select optimal vertical beam figuration matrix.By subframe N+4a+3b, base station can
To continue the traversal mode using same vertical beam figuration matrix, as shown in fig. 6, but this make for best vertical beam
The CSI feedback period of figuration matrix is practical to increase four times.Another method, then by subframe N+4a+3b, base station is each
CSI-RS sends subframe using the best vertical beam figuration matrix chosen, as shown in Figure 7.Thus start, each
CSI of the CSI of feedback both for best vertical beam figuration matrix.
It should be pointed out that the case where method provided in an embodiment of the present invention is configured with multiple pilot resources for base station according to
It is so available.The pilot resources of each configuration can use unused wave beam formed matrix, each pilot resources in different subframes
The circulation pattern of wave beam formed matrix used by the subframe at place can be configured by base station.
Based on inventive concept same as method, the pilot tone that the present invention implements also to provide in a kind of mimo system sends dress
It sets, as shown in Figure 8, comprising:
Wave beam forming module 801, for using different wave beam formed matrixes in the difference where the same pilot resources
Subframe carries out wave beam forming；
Pilot signal sending module 802 passes through for sending in each subframe where pilot resources to user equipment
The data and/or pilot signal of wave beam forming.
Technical solution provided in an embodiment of the present invention is led using different horizontal or vertical wave beam formed matrixes same
Different subframes where frequency resource carry out wave beam forming, therefore, can flexible configuration pilot resources according to actual needs quantity,
To meet actual transmissions demand, system performance is improved.For example, the pilot resources of configuration can be assigned less than horizontal or vertical wave beam
Shape matrix, to reduce the expense of pilot resources.Due to reducing pilot resources, the pilot tone feedback overhead of UE also subtracts
It is few.If only configuring a pilot resources, pilot-frequency expense will be greatly reduced.Similarly, if it is using wave beam formed matrix
Wave beam forming is carried out to the resource for channel measurement, pilot resources expense is small, and the pilot tone feedback overhead of UE is small.
Preferably, further including configuration module, it is used for:
It can be used for carrying out the subframe of channel measurement in subframe where indicating from the pilot resources to the user equipment.
Preferably, the configuration module is used for:
It can be used for carrying out the subframe of channel measurement where indicating the pilot resources to the user equipment in subframe
Quantity.
Preferably, the configuration module is used for:
Indicate that channel measurement cycle and sub-frame offset, the channel measurement cycle are pilot tone money to the user equipment
The integral multiple in the period in source.
Preferably, the configuration module is used for:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction, wherein the pilot resources
The pilot signal subframe at place is divided into the subset of several subframes that can be used for carrying out channel measurement.
Preferably, when the subset for the subframe that can be used for carrying out channel measurement to user equipment instruction, the configuration
Module is used for:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction by excitation feedback signaling.
Preferably, being less than the number of used wave beam formed matrix for the quantity of the pilot resources of the user device configuration
Amount.
Preferably, further including wave beam formed matrix selecting module, after carrying out channel measurement according to the user equipment
The measurement result of feedback selects at least one wave beam formed matrix from used wave beam formed matrix.
Preferably, the wave beam formed matrix used in different subframes where the same pilot resources is to pass through searching loop
What the mode of the corresponding each wave beam formed matrix of the pilot resources determined.
Preferably, before the corresponding measurement result of whole wave beam formed matrix used by obtaining, the same pilot resources
The wave beam formed matrix used in the different subframes at place is by traversing the corresponding each wave beam forming square of the pilot resources
What the mode of battle array determined；After the corresponding measurement result of whole wave beam formed matrix used by obtaining, the same pilot resources
The wave beam formed matrix used in the different subframes at place is the wave beam formed matrix of selection.
Preferably, the measurement result includes the user equipment within a predetermined period of time to where each pilot resources
Each subframe carries out the measured value of channel measurement.
Based on inventive concept same as method, present invention implementation also provides a kind of base station 900, as shown in Figure 9, comprising:
Processor 901, the processor 901 are configured as executing the computer program of following function: using different wave beams
Figuration matrix carries out wave beam forming in the different subframes where the same pilot resources；In each subframe where pilot resources
The data and/or pilot signal for passing through wave beam forming are sent to user equipment；
Memory 902, the memory 902 are configured as saving the code of above-mentioned computer program.
Technical solution provided in an embodiment of the present invention is led using different horizontal or vertical wave beam formed matrixes same
Different subframes where frequency resource carry out wave beam forming, therefore, can flexible configuration pilot resources according to actual needs quantity,
To meet actual transmissions demand, system performance is improved.For example, the pilot resources of configuration can be assigned less than horizontal or vertical wave beam
Shape matrix, to reduce the expense of pilot resources.Due to reducing pilot resources, the pilot tone feedback overhead of UE also subtracts
It is few.If only configuring a pilot resources, pilot-frequency expense will be greatly reduced.Similarly, if it is using wave beam formed matrix
Wave beam forming is carried out to the resource for channel measurement, pilot resources expense is small, and the pilot tone feedback overhead of UE is small.
Preferably, being less than the number of used wave beam formed matrix for the quantity of the pilot resources of the user device configuration
Amount.
Preferably, processor 901 is additionally configured to execute the computer program for having following function: being set according to the user
The standby measurement result feed back after channel measurement, selects at least one wave beam forming square from used wave beam formed matrix
Battle array, to carry out wave beam tax to the downlink signal for being sent to the user equipment using at least one wave beam formed matrix of selection
Shape；Memory 902 is additionally configured to save the code of above-mentioned computer program.
Preferably, the wave beam formed matrix used in different subframes where the same pilot resources is recycled by circulation
Traverse the mode determination of the corresponding each wave beam formed matrix of the pilot resources.
Preferably, before the corresponding measurement result of whole wave beam formed matrix used by obtaining, the same pilot resources
The wave beam formed matrix used in the different subframes at place is by traversing the corresponding each wave beam forming square of the pilot resources
What the mode of battle array determined；After the corresponding measurement result of whole wave beam formed matrix used by obtaining, the same pilot resources
The wave beam formed matrix used in the different subframes at place is the wave beam formed matrix of selection.
Preferably, the measurement result includes the user equipment within a predetermined period of time to where each pilot resources
Each subframe carries out the measured value of channel measurement.
Based on inventive concept same as method, the embodiment of the present invention also provides the channel measurement dress in a kind of mimo system
It sets, as shown in Figure 10, comprising:
Pilot measurement module 1001, for carrying out pilot measurement on pilot resources, wherein where the same pilot resources
Different subframes on wave beam forming carried out using different wave beam formed matrix；
Measurement feedback module 1002, for feeding back the measurement result for carrying out channel measurement.
Preferably, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
Preferably, the pilot measurement module is used for:
It is determined in the subframe where pilot resources according to the channel measurement subframe instruction information received for carrying out channel
The subframe of measurement, the channel measurement subframe, which is used to indicate in the subframe where the pilot resources, can be used for carrying out channel survey
The subframe of amount；
Channel measurement is carried out in determining subframe.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
When the subframe of row channel measurement, the pilot measurement module is used for:
According to the instruction information of the quantity for the subframe that can be used for carrying out channel measurement in subframe where the pilot resources,
It determines in the subframe where pilot resources for carrying out the subframe of channel measurement.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
When the subframe of row channel measurement, the pilot measurement module is used for:
It is determined according to the channel measurement cycle and sub-frame offset that receive in the subframe where pilot resources for carrying out letter
The subframe of road measurement, the channel measurement cycle are the integral multiple in the period of the pilot resources.
Preferably, according to the channel measurement subframe instruction information received determine in the subframe where pilot resources for into
When the subframe of row channel measurement, the pilot measurement module is used for:
Pilot resources institute is determined according to the instruction information of the subset of the subframe that can be used for carrying out channel measurement received
Subframe in for carrying out the subframe of channel measurement, wherein the pilot signal subframe where the pilot resources is divided into
The subset of several subframes that can be used for carrying out channel measurement.
Preferably, the instruction information of the subset of the subframe that can be used for carrying out channel measurement is carried in excitation feedback letter
In order.
Based on inventive concept same as method, the embodiment of the present invention also provides a kind of user equipment 1100, such as Figure 11 institute
Show, comprising:
Processor 1101, the processor 1101 are configured as executing the computer program for having following function: providing in pilot tone
Pilot measurement is carried out on source, wherein in the different subframes where the same pilot resources using different wave beam formed matrixes into
Row wave beam forming；Feedback carries out the measurement result of channel measurement；
Memory 1102, the memory 1102 are configured as saving the code of above-mentioned computer program.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (40)
1. the pilot sending method in a kind of mimo system characterized by comprising
Wave beam forming is carried out in the different subframes where the same pilot resources using different wave beam formed matrixes；Wherein, institute
Stating pilot resources is that the running time-frequency resource being distributed in different subframes by one group is constituted；
Data and/or the pilot tone letter by wave beam forming are sent to user equipment in each subframe where the pilot resources
Number.
2. the method according to claim 1, wherein the quantity of pilot resources is less than the number of wave beam formed matrix
Amount.
3. the method according to claim 1, wherein this method further include:
It can be used for carrying out the subframe of channel measurement in subframe where indicating from the pilot resources to the user equipment.
4. according to the method described in claim 3, it is characterized in that, where indicating the pilot resources to the user equipment
It can be used for carrying out the subframe of channel measurement in subframe, comprising:
It can be used for carrying out the quantity of the subframe of channel measurement where indicating the pilot resources to the user equipment in subframe.
5. the method according to claim 3 or 4, which is characterized in that Xiang Suoshu user equipment indicates the pilot resources institute
Subframe in can be used for carrying out the subframe of channel measurement, comprising:
Indicate that channel measurement cycle and sub-frame offset, the channel measurement cycle are the pilot resources to the user equipment
The integral multiple in period.
6. according to the method described in claim 3, it is characterized in that, where indicating the pilot resources to the user equipment
It can be used for carrying out the subframe of channel measurement in subframe, comprising:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction, wherein where the pilot resources
Pilot signal subframe be divided into the subsets of several subframes that can be used for carrying out channel measurement.
7. according to the method described in claim 6, it is characterized in that, can be used for carrying out channel survey to user equipment instruction
The subset of the subframe of amount, comprising:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction by excitation feedback signaling.
8. method according to any one of claims 1 to 4, which is characterized in that this method further include:
The measurement result fed back after channel measurement is carried out according to the user equipment, is selected from used wave beam formed matrix
At least one wave beam formed matrix.
9. according to the method described in claim 8, it is characterized in that, using in different subframes where the same pilot resources
Wave beam formed matrix is determined by way of looping through the corresponding each wave beam formed matrix of the pilot resources.
10. according to the method described in claim 8, it is characterized in that, whole wave beam formed matrixes used by obtaining are corresponding
Before measurement result, the wave beam formed matrix used in the different subframes where the same pilot resources is by leading described in traversal
What the mode of the corresponding each wave beam formed matrix of frequency resource determined；
Difference after the corresponding measurement result of whole wave beam formed matrix used by obtaining, where the same pilot resources
The wave beam formed matrix used on frame is the wave beam formed matrix of selection.
11. method according to any one of claims 1 to 4, which is characterized in that provided for the pilot tone of the user device configuration
The quantity in source is less than the quantity of used wave beam formed matrix.
12. according to the method for claim 11, which is characterized in that for the quantity of the pilot resources of the user device configuration
It is 1.
13. according to the method described in claim 8, it is characterized in that, the measurement result includes the user equipment predetermined
The measured value of channel measurement is carried out in period to each subframe where each pilot resources.
14. the channel measuring method in a kind of mimo system characterized by comprising
Pilot measurement is carried out on pilot resources, wherein different waves is used in the different subframes where the same pilot resources
Beam figuration matrix carries out wave beam forming；Wherein, the pilot resources are the running time-frequency resource structures being distributed in different subframes by one group
At；
Feedback carries out the measurement result of channel measurement.
15. according to the method for claim 14, which is characterized in that the quantity of pilot resources is less than the number of wave beam formed matrix
Amount.
16. according to the method for claim 14, which is characterized in that carry out pilot measurement on pilot resources, comprising:
It is determined in the subframe where pilot resources according to the channel measurement subframe instruction information received for carrying out channel measurement
Subframe, the channel measurement subframe, which is used to indicate in the subframe where the pilot resources, can be used for carrying out channel measurement
Subframe；
Channel measurement is carried out in determining subframe.
17. according to the method for claim 16, which is characterized in that true according to the channel measurement subframe instruction information received
Determine in the subframe where pilot resources for carrying out the subframe of channel measurement, comprising:
According to the instruction information of the quantity for the subframe that can be used for carrying out channel measurement where the pilot resources in subframe, determine
For carrying out the subframe of channel measurement in subframe where pilot resources.
18. method according to claim 16 or 17, which is characterized in that according to the channel measurement subframe instruction letter received
It ceases in the subframe where determining pilot resources for carrying out the subframe of channel measurement, comprising:
It is determined according to the channel measurement cycle and sub-frame offset that receive in the subframe where pilot resources for carrying out channel survey
The subframe of amount, the channel measurement cycle are the integral multiple in the period of the pilot resources.
19. according to the method for claim 17, which is characterized in that true according to the channel measurement subframe instruction information received
Determine in the subframe where pilot resources for carrying out the subframe of channel measurement, comprising:
Where determining pilot resources according to the instruction information of the subset of the subframe that can be used for carrying out channel measurement received
For carrying out the subframe of channel measurement in subframe, wherein the pilot signal subframe where the pilot resources is divided into several
It can be used for carrying out the subset of the subframe of channel measurement.
20. according to the method for claim 19, which is characterized in that the son of the subframe that can be used for carrying out channel measurement
The instruction information of collection carries in excitation feedback signaling.
21. the pilot tone sending device in a kind of mimo system characterized by comprising
Wave beam forming module, for being carried out using different wave beam formed matrixes in the different subframes where the same pilot resources
Wave beam forming；Wherein, the pilot resources are that the running time-frequency resource being distributed in different subframes by one group is constituted；
Pilot signal sending module passes through wave beam for sending in each subframe where the pilot resources to user equipment
The data and/or pilot signal of figuration.
22. device according to claim 21, which is characterized in that the quantity of pilot resources is less than the number of wave beam formed matrix
Amount.
23. device according to claim 21, which is characterized in that further include configuration module, be used for:
It can be used for carrying out the subframe of channel measurement in subframe where indicating from the pilot resources to the user equipment.
24. device according to claim 23, which is characterized in that the configuration module is used for:
It can be used for carrying out the quantity of the subframe of channel measurement where indicating the pilot resources to the user equipment in subframe.
25. the device according to claim 23 or 24, which is characterized in that the configuration module is used for:
Indicate that channel measurement cycle and sub-frame offset, the channel measurement cycle are the pilot resources to the user equipment
The integral multiple in period.
26. device according to claim 23, which is characterized in that the configuration module is used for:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction, wherein where the pilot resources
Pilot signal subframe be divided into the subsets of several subframes that can be used for carrying out channel measurement.
27. device according to claim 26, which is characterized in that the instruction of Xiang Suoshu user equipment can be used for carrying out channel
When the subset of the subframe of measurement, the configuration module is used for:
It can be used for carrying out the subset of the subframe of channel measurement to user equipment instruction by excitation feedback signaling.
28. according to the described in any item devices of claim 21~24, which is characterized in that further include wave beam formed matrix selection mould
Block, the measurement result for feed back after channel measurement according to the user equipment, from used wave beam formed matrix
Select at least one wave beam formed matrix.
29. device according to claim 28, which is characterized in that used in the different subframes where the same pilot resources
Wave beam formed matrix be to be determined by way of looping through the corresponding each wave beam formed matrix of the pilot resources.
30. device according to claim 28, which is characterized in that whole wave beam formed matrixes used by obtaining are corresponding
Before measurement result, the wave beam formed matrix used in the different subframes where the same pilot resources is by leading described in traversal
What the mode of the corresponding each wave beam formed matrix of frequency resource determined；
Difference after the corresponding measurement result of whole wave beam formed matrix used by obtaining, where the same pilot resources
The wave beam formed matrix used on frame is the wave beam formed matrix of selection.
31. according to the described in any item devices of claim 21~24, which is characterized in that be the pilot tone of the user device configuration
The quantity of resource is less than the quantity of used wave beam formed matrix.
32. device according to claim 31, which is characterized in that for the quantity of the pilot resources of the user device configuration
It is 1.
33. device according to claim 28, which is characterized in that the measurement result includes the user equipment predetermined
The measured value of channel measurement is carried out in period to each subframe where each pilot resources.
34. the means for channel measurement in a kind of mimo system characterized by comprising
Pilot measurement module, for carrying out pilot measurement on pilot resources, wherein difference where the same pilot resources
Wave beam forming is carried out using different wave beam formed matrixes on frame；Wherein, the pilot resources are to be distributed in different sons by one group
What the running time-frequency resource on frame was constituted；
Measurement feedback module, for feeding back the measurement result for carrying out channel measurement.
35. device according to claim 34, which is characterized in that the quantity of pilot resources is less than the number of wave beam formed matrix
Amount.
36. device according to claim 34, which is characterized in that the pilot measurement module is used for:
It is determined in the subframe where pilot resources according to the channel measurement subframe instruction information received for carrying out channel measurement
Subframe, the channel measurement subframe, which is used to indicate in the subframe where the pilot resources, can be used for carrying out channel measurement
Subframe；
Channel measurement is carried out in determining subframe.
37. device according to claim 36, which is characterized in that true according to the channel measurement subframe instruction information received
When determining in the subframe where pilot resources for carrying out the subframe of channel measurement, the pilot measurement module is used for:
According to the instruction information of the quantity for the subframe that can be used for carrying out channel measurement where the pilot resources in subframe, determine
For carrying out the subframe of channel measurement in subframe where pilot resources.
38. the device according to claim 36 or 37, which is characterized in that according to the channel measurement subframe instruction letter received
When ceasing in the subframe where determining pilot resources for carrying out the subframe of channel measurement, the pilot measurement module is used for:
It is determined according to the channel measurement cycle and sub-frame offset that receive in the subframe where pilot resources for carrying out channel survey
The subframe of amount, the channel measurement cycle are the integral multiple in the period of the pilot resources.
39. the device according to claim 37, which is characterized in that true according to the channel measurement subframe instruction information received
When determining in the subframe where pilot resources for carrying out the subframe of channel measurement, the pilot measurement module is used for:
Where determining pilot resources according to the instruction information of the subset of the subframe that can be used for carrying out channel measurement received
For carrying out the subframe of channel measurement in subframe, wherein the pilot signal subframe where the pilot resources is divided into several
It can be used for carrying out the subset of the subframe of channel measurement.
40. device according to claim 39, which is characterized in that the son of the subframe that can be used for carrying out channel measurement
The instruction information of collection carries in excitation feedback signaling.
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| CN201510104484.9A CN105322995B (en) | 2014-07-30 | 2015-03-10 | Pilot sending method, channel measuring method and device in mimo system |
| PCT/CN2015/085596 WO2016015666A1 (en) | 2014-07-30 | 2015-07-30 | Pilot frequency sending method, channel measurement method and apparatus |
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| CN201510104484.9A CN105322995B (en) | 2014-07-30 | 2015-03-10 | Pilot sending method, channel measuring method and device in mimo system |
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| CN107294644A (en) * | 2016-03-31 | 2017-10-24 | 株式会社Ntt都科摩 | Reference signal sending method, channel state information feedback method, base station and mobile station |
| WO2017193278A1 (en) * | 2016-05-10 | 2017-11-16 | 富士通株式会社 | Configuration method for csi-rs, feedback method and device for csi, and communication system |
| CN107733486B (en) * | 2016-08-12 | 2021-07-30 | 中兴通讯股份有限公司 | Information transmission method and device in hybrid beam forming system |
| CN107733485B (en) * | 2016-08-12 | 2021-09-03 | 中兴通讯股份有限公司 | Feedback method and device of channel state information |
| CN107769826A (en) | 2016-08-19 | 2018-03-06 | 索尼公司 | Electronic equipment and method and wireless communication system in wireless communication system |
| CN116366112A (en) * | 2016-09-30 | 2023-06-30 | 中兴通讯股份有限公司 | Feedback method and device for channel information |
| CN108012274B (en) | 2016-11-01 | 2019-10-29 | 上海朗帛通信技术有限公司 | A kind of UE being used for range extension, the method and apparatus in base station |
| CN110299935B (en) * | 2018-03-21 | 2022-11-08 | 中兴通讯股份有限公司 | Communication method, base station, terminal, storage medium and electronic device |
| EP4087153A4 (en) * | 2020-02-07 | 2023-01-18 | Huawei Technologies Co., Ltd. | Signal transmission method and apparatus |
| CN114554513B (en) * | 2021-12-30 | 2024-06-11 | 中国电信股份有限公司 | Method, device and network equipment for determining beam forming parameters |
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| US7720470B2 (en) * | 2006-06-19 | 2010-05-18 | Intel Corporation | Reference signals for downlink beamforming validation in wireless multicarrier MIMO channel |
| CN101877865B (en) * | 2009-04-30 | 2014-06-11 | 中兴通讯股份有限公司 | Method and system for sending measurement reference signal, base station and relay station |
| CN102938688B (en) * | 2011-08-15 | 2015-05-27 | 上海贝尔股份有限公司 | Method and device for channel measurement and feedback of multi-dimensional antenna array |
| CN102315871B (en) * | 2011-09-30 | 2017-03-29 | 中兴通讯股份有限公司 | The processing method of aperiodic channel condition information, apparatus and system |
| CN102368697B (en) * | 2011-09-30 | 2018-04-03 | 中兴通讯股份有限公司 | Interferometry signals, interferometry and feedback method and its device |
| CN102546110A (en) * | 2011-12-31 | 2012-07-04 | 电信科学技术研究院 | Channel state information transmission method and device |
| KR20150035545A (en) * | 2012-06-24 | 2015-04-06 | 엘지전자 주식회사 | Method and apparatus for reporting channel state information in wireless communication system |
| CN103687010B (en) * | 2012-08-30 | 2017-07-04 | 电信科学技术研究院 | A kind of method of transmission of reference signals, apparatus and system |
| CN103840907B (en) * | 2012-11-20 | 2018-06-05 | 电信科学技术研究院 | A kind of method, system and equipment for transmitting pilot signal and signal measurement |
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| US7885348B2 (en) * | 2006-02-09 | 2011-02-08 | Intel Corporation | MIMO communication system and method for beamforming using polar-cap codebooks |
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