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CN105322995A - Pilot frequency sending method, channel measurement method and channel measurement device in MIMO system - Google Patents

Pilot frequency sending method, channel measurement method and channel measurement device in MIMO system Download PDF

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Publication number
CN105322995A
CN105322995A CN201510104484.9A CN201510104484A CN105322995A CN 105322995 A CN105322995 A CN 105322995A CN 201510104484 A CN201510104484 A CN 201510104484A CN 105322995 A CN105322995 A CN 105322995A
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China
Prior art keywords
subframe
channel measurement
pilot resources
wave beam
carrying
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CN201510104484.9A
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CN105322995B (en
Inventor
陈润华
高秋彬
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China Academy of Telecommunications Technology CATT
Datang Mobile Communications Equipment Co Ltd
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China Academy of Telecommunications Technology CATT
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Priority to CN201510104484.9A priority Critical patent/CN105322995B/en
Priority to PCT/CN2015/085596 priority patent/WO2016015666A1/en
Publication of CN105322995A publication Critical patent/CN105322995A/en
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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
    • 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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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention discloses a pilot frequency sending method, a channel measurement method and a channel measurement device in an MIMO system. The pilot frequency sending method comprises the following steps: performing beam forming on different sub-frames, where the same pilot frequency resource is, by adopting different beam forming matrixes; and sending a beam formed data and/or pilot frequency signal to user equipment on various sub-frames, where the pilot frequency resource is. According to the technical scheme provided in the embodiment of the invention, the number of the configured pilot frequency resource can be less than the number of the beam forming matrixes; therefore, the expense of the pilot frequency resource is reduced; and the pilot frequency feedback expense is reduced.

Description

Pilot sending method in mimo system, channel measuring method and device
This application claims and submit on July 30th, 2014 priority that Patent Office of the People's Republic of China, application number are 201410371543.4, denomination of invention is the Chinese patent application of " pilot sending method in a kind of mimo system, method of measurement and device " to, its full content combines in this application by reference.
Technical field
The present invention relates to wireless communication technology field, particularly relate to the pilot sending method in a kind of mimo system, channel measuring method and device.
Background technology
Two-dimensional antenna structure in 3 dimension (3D) multiple-input and multiple-output (Multiple-InputMultiple-Output, MIMO) systems as shown in Figure 1.Figure 1 shows that the single-polarized antenna structure of 64 antennas, wherein each cylinder graphical representation antenna.It should be pointed out that, in 3DMIMO system, 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 be not limited only to single-polarized antenna structure, can also be dual-polarized antenna structure.3DMIMO also can be called full dimension (Full-Dimension, FD) MIMO.
In the 3DMIMO system of two-dimensional antenna structure, not only can carry out wave beam forming in the horizontal direction, also can carry out wave beam forming in the vertical direction.A typical apply scene is vertical dimension sectorization.The implication of vertical dimension sectorization is explained below in conjunction with accompanying drawing.
16 antennas in base station side two-dimensional antenna structure shown in Fig. 2 a are virtualized into 4 antenna ports.Wherein, be virtualized into an antenna port at 4 antennas of vertical dimension, as shown in Figure 2 b, be divided into 3 sectors in vertical dimension and cover a high building.
Based on the antenna structure of Fig. 2 a and the vertical dimension sectorization framework of Fig. 2 b, each sector configures a set of 4 port channel state information reference signals (ChannelStateInformation-ReferenceSignal, CSI-RS (or community own reference signal (Cell-specificReferenceSignal, CRS)) resource, needs 3 overlap 4 port CSI-RS (or CRS) resources so altogether.
Handling process based on above-mentioned application scenarios is as follows:
Base station adopts different vertical beam figuration vectors to carry out vertical beam figuration in CSI-RS (or CRS) resource that each sector is corresponding;
Subscriber equipment (UserEquipment, UE) each CSI-RS (or CRS) resource is measured, and for each CSI-RS (or CRS) resource feed back a CSI (comprise order instruction (RankIndicator, RI), pre-coding matrix instruction (Pre-CodingMatrixIndicator, PMI) and channel quality instruction (ChannelQualityIndicator, CQI)), so need here to feed back multiple CSI;
Best vertical beam figuration vector, according to the multiple CSI fed back, is selected in base station.
When carrying out wave beam forming in the horizontal direction, be also each CSI-RS (or CRS) resource adopts different vertical beam figuration vectors carry out vertical beam figuration.
In above-mentioned prior art, adopt how many wave beam forming vectors, just need how many CSI-RS (or CRS) resources.Namely the quantity of pilot resources quantity and wave beam forming vector is one to one, causes pilot resources to configure dumb.
Summary of the invention
The object of this invention is to provide the pilot sending method in a kind of mimo system, channel measuring method and device, configure inflexible problem to solve pilot resources.
The object of the invention is to be achieved through the following technical solutions:
A pilot sending method in mimo system, comprising:
Different wave beam formed matrixes is adopted to carry out wave beam forming in the different subframes at same pilot resources place;
Each subframe at described pilot resources place sends through the data of wave beam forming and/or pilot signal to subscriber equipment.
Preferably, the method also comprises: indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place to described subscriber equipment.
Preferably, indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place to described subscriber equipment, comprising:
The quantity that may be used for the subframe of carrying out channel measurement in the subframe of described pilot resources place is indicated to described subscriber equipment.
Preferably, indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place to described subscriber equipment, comprising:
To described subscriber equipment indicating channel measuring period and sub-frame offset, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
Preferably, indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place to described subscriber equipment, comprising:
May be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Preferably, may be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, comprising:
The subset of the subframe of carrying out channel measurement is may be used for described subscriber equipment instruction by exciting feedback signaling.
Based on above-mentioned any means embodiment, preferably, the method also comprises: the measurement result fed back after carrying out channel measurement according to described subscriber equipment, selects at least one wave beam formed matrix from adopted wave beam formed matrix.
Preferably, the wave beam formed matrix that the different subframes at same pilot resources place adopt is determined by the mode of each wave beam formed matrix corresponding to pilot resources described in searching loop.
Preferably, before the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is that the mode by traveling through each wave beam formed matrix corresponding to described pilot resources is determined;
After the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is the wave beam formed matrix selected.
In the embodiment of the present invention, the quantity for the pilot resources of described user device configuration is less than the quantity of adopted wave beam formed matrix.Preferably, for the quantity of the pilot resources of described user device configuration is 1.
Based on above-mentioned any means embodiment, preferably, described measurement result comprises described subscriber equipment carries out channel measurement within a predetermined period of time measured value to each subframe at each pilot resources place.
A channel measuring method in mimo system, comprising:
Pilot resources carries out pilot measurement, wherein, the different subframes at same pilot resources place adopts different wave beam formed matrixes to 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, pilot resources carries out pilot measurement, comprising:
According in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, described channel measurement subframe is used to indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place;
The subframe determined carries out channel measurement.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, comprising:
According to the indication information that may be used for the quantity of the subframe of carrying out channel measurement in the subframe of described pilot resources place, determine in the subframe at pilot resources place for carrying out the subframe of channel measurement.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, comprising:
According in the subframe at the channel measurement cycle received and sub-frame offset determination pilot resources place for carrying out the subframe of channel measurement, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, comprising:
According to may be used in the subframe at the indication information determination pilot resources place of the subset of the subframe of carrying out channel measurement for carrying out the subframe of channel measurement of receiving, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Preferably, the indication information that may be used for the subset of the subframe of carrying out channel measurement described in is carried at and excites in feedback signaling.
A means for channel measurement in mimo system, comprising:
Wave beam forming module, carries out wave beam forming for adopting different wave beam formed matrixes in the different subframes at same pilot resources place;
Pilot signal sending module, sends through the data of wave beam forming and/or pilot signal to subscriber equipment in each subframe at described pilot resources place.
Preferably, also comprise configuration module, for:
The subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place is indicated to described subscriber equipment.
Preferably, described configuration module is used for:
The quantity that may be used for the subframe of carrying out channel measurement in the subframe of described pilot resources place is indicated to described subscriber equipment.
Preferably, described configuration module is used for:
To described subscriber equipment indicating channel measuring period and sub-frame offset, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
Preferably, described configuration module is used for:
May be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Preferably, when may be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, described configuration module is used for:
The subset of the subframe of carrying out channel measurement is may be used for described subscriber equipment instruction by exciting feedback signaling.
Preferably, also comprise wave beam formed matrix and select module, for the measurement result fed back after carrying out channel measurement according to described subscriber equipment, from adopted wave beam formed matrix, select at least one wave beam formed matrix.
Preferably, the wave beam formed matrix that the different subframes at same pilot resources place adopt is determined by the mode of each wave beam formed matrix corresponding to pilot resources described in searching loop.
Preferably, before the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is that the mode by traveling through each wave beam formed matrix corresponding to described pilot resources is determined;
After the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is the wave beam formed matrix selected.
In the embodiment of the present invention, the quantity for the pilot resources of described user device configuration is less than the quantity of adopted wave beam formed matrix.Preferably, for the quantity of the pilot resources of described user device configuration is 1.
Based on above-mentioned any device embodiment, preferably, described measurement result comprises described subscriber equipment carries out channel measurement within a predetermined period of time measured value to each subframe at each pilot resources place.
A kind of base station, comprising:
Processor, this processor is configured to perform the computer program possessing following function: adopt different wave beam formed matrixes to carry out wave beam forming in the different subframes at same pilot resources place; Each subframe at pilot resources place send through the data of wave beam forming and/or pilot signal to subscriber equipment;
Memory, this memory is configured to the code preserving above computer program.
Preferably, this processor is also configured to perform the computer program possessing following function: indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place to described subscriber equipment.
Preferably, indicate when may be used for the subframe of carrying out channel measurement in the subframe at described pilot resources place to described subscriber equipment, this processor is also configured to perform the computer program possessing following function: indicate the quantity that may be used for the subframe of carrying out channel measurement in the subframe of described pilot resources place to described subscriber equipment.
Preferably, indicate when may be used for the subframe of carrying out channel measurement in the subframe at described pilot resources place to described subscriber equipment, this processor is also configured to perform the computer program possessing following function: to described subscriber equipment indicating channel measuring period and sub-frame offset, and described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
Preferably, indicate when may be used for the subframe of carrying out channel measurement in the subframe at described pilot resources place to described subscriber equipment, this processor is also configured to perform the computer program possessing following function: the subset that may be used for the subframe of carrying out channel measurement to described subscriber equipment instruction, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Preferably, when may be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, this processor is also configured to perform the computer program possessing following function: may be used for the subset of the subframe of carrying out channel measurement by exciting feedback signaling to described subscriber equipment instruction.
Preferably, this processor is also configured to perform the computer program possessing following function: the measurement result fed back after carrying out channel measurement according to described subscriber equipment, selects at least one wave beam formed matrix from adopted wave beam formed matrix.
Preferably, the wave beam formed matrix that the different subframes at same pilot resources place adopt is determined by the mode of each wave beam formed matrix corresponding to pilot resources described in searching loop.
Preferably, before the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is that the mode by traveling through each wave beam formed matrix corresponding to described pilot resources is determined;
After the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is the wave beam formed matrix selected.
Wherein, for the quantity of the pilot resources of described user device configuration is less than the quantity of adopted wave beam formed matrix.Preferably, for the quantity of the pilot resources of described user device configuration is 1.
Based on above-mentioned any base station embodiment, preferably, described measurement result comprises described subscriber equipment carries out channel measurement within a predetermined period of time measured value to each subframe at each pilot resources place.
A means for channel measurement in mimo system, comprising:
Pilot measurement module, for carrying out pilot measurement on pilot resources, wherein, the different subframes at same pilot resources place adopts different wave beam formed matrixes to carry out wave beam forming;
Measurement feedback module, for feeding back the measurement result of carrying out channel measurement.
Preferably, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
Preferably, described pilot measurement module is used for:
According in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, described channel measurement subframe is used to indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place;
The subframe determined carries out channel measurement.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described pilot measurement module is used for:
According to the indication information that may be used for the quantity of the subframe of carrying out channel measurement in the subframe of described pilot resources place, determine in the subframe at pilot resources place for carrying out the subframe of channel measurement.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described pilot measurement module is used for:
According in the subframe at the channel measurement cycle received and sub-frame offset determination pilot resources place for carrying out the subframe of channel measurement, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described pilot measurement module is used for:
According to may be used in the subframe at the indication information determination pilot resources place of the subset of the subframe of carrying out channel measurement for carrying out the subframe of channel measurement of receiving, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Preferably, the indication information that may be used for the subset of the subframe of carrying out channel measurement described in is carried at and excites in feedback signaling.
A kind of subscriber equipment, comprising:
Processor, this processor is configured to perform the computer program possessing following function: on pilot resources, carry out pilot measurement, wherein, the different subframes at same pilot resources place adopts different wave beam formed matrixes to carry out wave beam forming; Feedback carries out the measurement result of channel measurement;
Memory, this memory is configured to the code preserving above computer program.
Preferably, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
Preferably, when pilot resources carries out pilot measurement, described processor is configured to perform following computer program: according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, described channel measurement subframe is used to indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place;
The subframe determined carries out channel measurement.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described processor is configured to perform following computer program: according to the indication information that may be used for the quantity of the subframe of carrying out channel measurement in the subframe of described pilot resources place, determine in the subframe at pilot resources place for carrying out the subframe of channel measurement.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described processor is configured to perform following computer program:
According in the subframe at the channel measurement cycle received and sub-frame offset determination pilot resources place for carrying out the subframe of channel measurement, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described processor is configured to perform following computer program: according to may be used in the subframe at the indication information determination pilot resources place of the subset of the subframe of carrying out channel measurement for carrying out the subframe of channel measurement of receiving, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Preferably, the indication information that may be used for the subset of the subframe of carrying out channel measurement described in is carried at and excites in feedback signaling.
In each embodiment of the present invention, a kind of special circumstances of wave beam formed matrix are wave beam forming vectors.
The technical scheme that the embodiment of the present invention provides is applicable to vertical beam figuration, is also applicable to horizontal beam figuration.The embodiment of the present invention, different horizontal or vertical wave beam formed matrixes is adopted to carry out wave beam forming in the different subframes at same pilot resources place, therefore, can the quantity of flexible configuration pilot resources according to actual needs, thus meet actual transmissions demand, improve systematic function.Such as, the pilot resources of configuration can be less than horizontal or vertical wave beam formed matrix, thus can reduce the expense of pilot resources.Owing to decreasing pilot resources, therefore, the pilot tone feedback overhead of UE decreases.If only configure a pilot resources, then pilot-frequency expense and pilot tone feedback overhead will reduce greatly.
In addition, in the embodiment of the present invention, may be used for the subframe of carrying out channel measurement by base station to UE instruction, channel measurement can be carried out according to adopting the subframe of same wave beam formed matrix by control UE, thus improve scheduling accuracy and systematic function.
Accompanying drawing explanation
Fig. 1 is the two-dimensional antenna structural representation in 3DMIMO system;
Fig. 2 a is that in 3DMIMO system, antenna port divides schematic diagram;
Fig. 2 b is vertical dimension sectorization schematic diagram in 3DMIMO system;
A kind of method flow diagram that Fig. 3 provides for the embodiment of the present invention;
Fig. 4 for the embodiment of the present invention provide by exciting feedback signaling to may be used for the schematic diagram of the subset of the subframe of carrying out channel measurement to UE instruction;
The another kind of method flow diagram that Fig. 5 provides for the embodiment of the present invention;
A kind of vertical beam figuration schematic diagram that Fig. 6 provides for the embodiment of the present invention;
The another kind of vertical beam figuration schematic diagram that Fig. 7 provides for the embodiment of the present invention;
A kind of device schematic diagram that Fig. 8 provides for the embodiment of the present invention;
The base station schematic diagram that Fig. 9 provides for the embodiment of the present invention;
The another kind of device schematic diagram that Figure 10 provides for the embodiment of the present invention;
The subscriber equipment schematic diagram that Figure 11 provides for the embodiment of the present invention.
Embodiment
The technical scheme that the embodiment of the present invention provides is applied to mimo system, this mimo system can but be not limited only to be 3D/FDMIMO system, also can be other mimo systems.
Below in conjunction with accompanying drawing, the technical scheme that the embodiment of the present invention provides is described in detail.
The method that the embodiment of the present invention provides network side implementation as shown in Figure 3, specifically comprise following operation:
Step 300, different wave beam formed matrixes is adopted to carry out wave beam forming in the different subframes at same pilot resources place.
Wherein, pilot resources is made up of one group of running time-frequency resource, and these running time-frequency resources are distributed in different subframes.Therefore, the subframe at pilot resources place refers to the subframe at the one group of running time-frequency resource place forming pilot resources.
Step 310, send through the data of wave beam forming and/or pilot signal, so that UE carries out channel measurement to UE in each subframe at pilot resources place.
In each embodiment of the present invention, pilot signal can but be not limited only to be CSI-RS, CRS etc.
Above-mentioned processing procedure can but be not limited only to be realized by base station.
Above-mentioned processing procedure is applicable to wave beam forming dynamic conditioning in the vertical direction, is certainly also applicable to wave beam forming dynamic conditioning in the horizontal direction.
The technical scheme that the embodiment of the present invention provides, different horizontal or vertical wave beam formed matrixes is adopted to carry out wave beam forming in the different subframes at same pilot resources place, therefore, can the quantity of flexible configuration pilot resources according to actual needs, thus meet actual transmissions demand, improve systematic function.Such as, in prior art, if there be P vertical beam figuration vector, just need to divide P sector in vertical dimensions, and configuration P pilot resources, cause CSI-RS expense excessive.And the scheme that the embodiment of the present invention provides, the pilot resources of configuration can be less than horizontal or vertical wave beam formed matrix, thus decreases the expense of pilot resources.Owing to decreasing pilot resources, therefore, the pilot tone feedback overhead of UE decreases.In like manner, if adopt wave beam formed matrix to carry out wave beam forming to the resource for channel measurement, its pilot resources expense is little, and the pilot tone feedback overhead of UE is little.
Preferably, for the quantity of the pilot resources of user device configuration is less than the quantity of adopted wave beam formed matrix.If only configure a pilot resources, then pilot-frequency expense will reduce greatly.
Preferably, the subframe at each pilot resources place sends after the data and/or pilot signal of wave beam forming to UE, the measurement result fed back after carrying out channel measurement according to this UE, selects at least one wave beam formed matrix from above-mentioned adopted wave beam formed matrix.
Concrete, be the descending according to the measured value in measurement result, select at least one wave beam formed matrix.
In the embodiment of the present invention, measurement result can but be not limited only to be Reference Signal Received Power (ReferenceSignalReceivingPower, and/or Reference Signal Received Quality (ReferenceSignalReceivingQuality, RSRQ) measured value RSRP).Accordingly, according to the descending of RSRP and/or RSRQ measured value, select at least one wave beam formed matrix.The quantity of the wave beam formed matrix selected can configure according to the actual requirements, and the present invention is not construed as limiting this.
In above-mentioned steps 300, the determination mode of the wave beam formed matrix that the different subframes at same pilot resources place adopt has multiple, preferably, is that the mode by traveling through each wave beam formed matrix corresponding to this pilot resources is determined.Wherein, the specific implementation of traversal can be travel through each wave beam formed matrix according to predetermined order, also can be that the mode of Stochastic choice travels through each wave beam formed matrix.
For vertical beam figuration matrix, suppose there are 4 vertical beam figuration matrix { V 1, V 2, V 3, V 4, be configured with a pilot resources, the cycle of this pilot resources is n subframe.If traveled through each vertical beam figuration matrix according to predetermined order, suppose that this predetermined order is V 1, V 2, V 3, V 4, at the subframe N at pilot resources place, adopt V 1carry out vertical beam figuration, so, at subframe N+n, adopt V 2carry out vertical beam figuration, at subframe N+2n, adopt V 3carry out vertical beam figuration, at subframe N+3n, adopt V 4carry out vertical beam figuration; If searching loop, at subframe N+4n, adopt V 1carry out vertical beam figuration, by that analogy.If the mode of Stochastic choice travels through each vertical beam figuration matrix, suppose the subframe N at pilot resources place, at random from { V 1, V 2, V 3, V 4a middle selection (such as V 2) carry out vertical beam figuration, so, at subframe N+n, at random from { V 1, V 3, V 4a middle selection (such as V 3) carry out vertical beam figuration, at subframe N+2n, at random from { V 1, V 4a middle selection (such as V 1) carry out vertical beam figuration, at subframe N+3n, adopt V 1carry out vertical beam figuration; If searching loop, at subframe N+4n, at random from { V 1, V 2, V 3, V 4in select one carry out vertical beam figuration, by that analogy.
Still for vertical beam figuration matrix, suppose there are 4 vertical beam figuration matrix { V 1, V 2, V 3, V 4, be configured with two pilot resources, the cycle of a pilot resources is n subframe, this pilot resources correspondence { V 1, V 2, the cycle of another pilot resources is m subframe, this pilot resources correspondence { V 3, V 4.It should be pointed out that the vertical beam figuration matrix that pilot resources is corresponding the concrete method of salary distribution can according to application need adjustment, be only herein citing and non-limiting.If traveled through each vertical beam figuration matrix according to predetermined order, suppose for { V 1, V 2, the order of this setting is V 1, V 2, for { V 3, V 4, the order of this setting is V 3, V 4, be the subframe N at the pilot resources place of n subframe in the cycle, adopt V 1carry out vertical beam figuration, so, at subframe N+n, adopt V 2carry out vertical beam figuration, at subframe N+2n, adopt V 1carry out vertical beam figuration, by that analogy; Be the subframe M at the pilot resources place of m subframe in the cycle, adopt V 3carry out vertical beam figuration, so, at subframe M+m, adopt V 4carry out vertical beam figuration, at subframe M+2m, adopt V 3carry out vertical beam figuration, by that analogy.If the mode of Stochastic choice travels through each vertical beam figuration matrix, suppose that in the cycle be the subframe N at the pilot resources place of n subframe, at random from { V 1, V 2a middle selection (such as V 2) carry out vertical beam figuration, so, at subframe N+n, adopt V 1carry out vertical beam figuration, at subframe N+2n, at random from { V 1, V 2a middle selection (such as V 2) carry out vertical beam figuration, by that analogy; Be the subframe M at the pilot resources place of m subframe in the cycle, at random from { V 3, V 4a middle selection (such as V 3) carry out vertical beam figuration, so, at subframe M+m, adopt V 4carry out vertical beam figuration, at subframe M+2m, at random from { V 3, V 4a middle selection (such as V 3) carry out vertical beam figuration, by that analogy.
It should be pointed out that above-mentioned is only the preferred implementation determining the wave beam formed matrix that the different subframes at same pilot resources place adopt.The embodiment of the present invention does not get rid of the wave beam formed matrix determining by other means the different subframes at same pilot resources place adopt.Such as, for each subframe at pilot resources place, all Stochastic choice wave beam formed matrixes from all wave beam formed matrixes corresponding to this pilot resources; Or every two adjacent subframes adopt same wave beam formed matrix etc., do not enumerate herein.
Further, before the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is that the mode by traveling through each wave beam formed matrix corresponding to described pilot resources is determined; After the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is the wave beam formed matrix selected.
The measurement result that wave beam formed matrix is corresponding, namely to the measurement result adopting the subframe measurement of this wave beam formed matrix to obtain.
Based on above-mentioned any means embodiment, above-mentioned measurement result comprises above-mentioned UE carries out channel measurement within a predetermined period of time measured value to all or part of subframe at each pilot resources place.Wherein, measured value can but be not limited only to be the measured value of following at least one: CSI, RSRP, RSRQ etc.UE both can periodic feedback measured value, also can aperiodicity feedback measured value.For periodic feedback measured value, the measured value in each cycle can be concentrated feedback by UE.It should be pointed out that UE also can adopt other feedback systems, such as, each subframe for each pilot resources place is fed back respectively, etc.
Based on above-mentioned any means embodiment, after selecting at least one wave beam formed matrix, other problems can be solved with the wave beam formed matrix selected, such as, carry out the wave beam forming of 3D/FDMIMO, precoding etc.
The wave beam forming that at least one wave beam formed matrix carries out 3D/FDMIMO is selected to utilize, above-mentioned pilot resources is called the first pilot resources, base station configuration is also configured with at least one second pilot resources, and corresponding implementation can be: the pilot signal at least one second pilot resources adopting at least one wave beam formed matrix selected to configure base station carries out wave beam forming (namely adopting at least one wave beam formed matrix of selection to carry out wave beam forming to sending to the downstream signal of above-mentioned UE); At least one second pilot resources of base station configuration sends the pilot signal through wave beam forming.
The implementation adopting the wave beam formed matrix selected to carry out wave beam forming on the second pilot resources has multiple, and the present invention cannot enumerate, and is only illustrated with several preferred embodiment.
Suppose a wave beam formed matrix base station selected, then adopted this wave beam formed matrix of selection to carry out wave beam forming to the second pilot resources.UE measures on the second pilot resources, and feedback measurement.Measurement result according to UE feedback carries out wave beam forming on 3D/FDMIMO aerial array, does not need the wave beam forming for 3D/FDMIMO aerial array to be further processed.
Suppose that base station is configured with two the second pilot resources, and base station selected two wave beam formed matrixes, then base station adopts different wave beam formed matrixes to carry out wave beam forming to different second pilot resources respectively.UE measures respectively on these two second pilot resources, and feeds back the measurement result measured on these two second pilot resources.According to UE respectively to the feedback result that this two second pilot resources are measured, select the beamforming scheme of 3D/FDMIMO aerial array.
The definition of traditional C/S I is the necessary corresponding CSI reference resources (referenceresource) of a CSI feedback, and CSI reflects the quality/power of the channel that UE can observe above CSIreferenceresource.In time domain, a CSIreferenceresource corresponds to a subframe (subframe), and be called CSIreferenceresource subframe, CSIreferenceresource subframe can comprise CSI-RS also can not comprise CSI-RS.In the definition of traditional 3GPPLTE, CSI is defined as follows: if eNB is directly used for scheduling with the CSI that UE reports on CSIreferenceresource do transfer of data, then UE must receive the demodulation BLER (blockerrorrate) that data obtain and be no more than 10% on CSIreferenceresource.If sub-frame of uplink n is the sub-frame of uplink of CSI feedback, descending sub frame n-k is CSIreferenceresource subframe, and it meets the requirement that BLER is no more than 10%, and wherein, n and k is integer.CSIreferenceresource subframe not necessarily is the subframe comprising CSI-RS.UE is realized, before UE should use CSIreferenceresource subframe or the N number of CSI-RS subframe being no earlier than CSIreferenceresource subframe carry out channel measurement (N>=1), be used for the channel estimating obtained on CSIreferenceresource.N is the number of the CSI-RS subframe that UE measures in CSI feedback each time, has UE oneself to determine in existing system, the information of network not this number, also this number uncontrollable.In existing system, the network subframe that also which uncontrollable UE uses comprise CSI-RS carries out channel estimating.Wherein, CSIreferenceresource subframe and CSI-RS subframe are all the subframes at CSIreferenceresource place, and CSI-RS subframe is the subframe comprising CSI-RS.
In the embodiment of the present invention, because the different subframes at same pilot resources (as CSIreferenceresource) place adopt different wave beam formed matrixes.The wave beam formed matrix difference that two subframes use, then correspond to different channel conditions after wave beam forming, if UE determines the measurement result of this pilot resources according to the measurement result in these two subframes, the measurement result of the pilot resources determined so accurately cannot correspond to any one wave beam formed matrix adopted in these two subframes, then select wave beam formed matrix according to the measurement result of UE feedback, the wave beam formed matrix selected not only can not bring gain, may reduce scheduling accuracy and systematic function on the contrary.For avoiding this situation to occur, the embodiment of the present invention provides following solution.
The subframe that may be used for carrying out channel measurement in the subframe at above-mentioned pilot resources place is indicated to subscriber equipment.
Above-mentioned solution can coordinate with the scheme of above-mentioned any embodiment to be implemented.Respectively this solution is described in detail below.
Above-mentioned solution defines the CSI fed back in each sub-frame of uplink, and UE must use one group of CSI-RSsubframe determined to its channel measurement.Wherein, one group of CSI-RSsubframe is made up of at least one CSI-RS subframe.Because the CSI of each uplink feedback corresponds to a descending CSIreferenceresource, be also equivalent to here each CSIreferenceresource, UE must use a group or a determine comprise CSI-RSsubframe to its channel measurement.
In the embodiment of the present invention, may be used for the subframe of carrying out channel measurement by base station to UE instruction, channel measurement can be carried out according to adopting the subframe of same wave beam formed matrix by control UE, thus improve scheduling accuracy and systematic function.
A kind of implementation that may be used for the subframe of carrying out channel measurement in the subframe at above-mentioned pilot resources place is indicated to be to subscriber equipment: indicate the quantity (i.e. above-mentioned N) that may be used for the subframe of carrying out channel measurement in the subframe of above-mentioned pilot resources place to subscriber equipment.Because subscriber equipment and network side are reached an agreement for the feedback subframe of CSI and the corresponding relation of CSIreferenceresource subframe, therefore, indicating the quantity that may be used for the subframe of carrying out channel measurement in the subframe of above-mentioned pilot resources place to subscriber equipment, is namely indicate to subscriber equipment the subframe that may be used for carrying out channel measurement in the subframe at above-mentioned pilot resources place.
Such as, if the value of above-mentioned N is 1, the subframe (CSI-RSsubframe) can carrying out channel measurement is the subframe comprising CSI-RS being no earlier than CSIreferenceresource.If CSIreferenceresource subframe is a CSI-RS subframe inherently, then this CSI-RS subframe can be used to measure CSIreferenceresource.If CSIreferenceresource subframe itself does not comprise CSI-RS, then before can using CSIreferenceresource subframe, a CSI-RS subframe is the latest measured.Accordingly, the treatment step of UE and eNB is as follows.According to the subframe of CSI feedback, UE obtains CSI-referenceresource subframe, and then UE obtains the CSI-RS subframe being no earlier than CSI-reference-resource, and UE carries out channel measurement to this CSI-RS subframe.ENB and UE has the understanding of unified sequential relationship, then according to the subframe of CSI feedback, can infer which vertical dimensions wave beam forming the CSI that UE feeds back is directed to.If N>1, then time UE carries out measuring for some CSIreferenceresource, maximumly can to measure in N number of subframe.
Wherein, base station can indicate by high-level signaling the quantity that may be used for the subframe of carrying out channel measurement in the subframe of above-mentioned pilot resources place to subscriber equipment.
For periodic CSI feedback, no matter whether base station indicates above-mentioned value N, indicate the subframe that may be used for carrying out channel measurement in the subframe at above-mentioned pilot resources place also can pass through to realize to subscriber equipment indicating channel measuring period and sub-frame offset to subscriber equipment, wherein, channel measurement cycle is the cycle integral multiple of above-mentioned pilot resources.Such as, suppose that the CSI-RS cycle is 10ms, eNB high level has 4 vertical dimensions wave beam formed matrixes, adopt the mode of poll within each CSI-RS cycle, adopt a vertical dimensions wave beam formed matrix, then UE is when carrying out channel and being average, and it is average to carry out channel in the CSI-RS subframe of interval 40ms.
Wherein, high-level signaling indicating channel measuring period and sub-frame offset can be passed through in base station.
The another kind of implementation that may be used for the subframe of carrying out channel measurement in the subframe at above-mentioned pilot resources place is indicated to be to subscriber equipment: the subset that may be used for the subframe of carrying out channel measurement to subscriber equipment instruction, wherein, the pilot signal subframe at pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Wherein, base station can may be used for the subset of the subframe of carrying out channel measurement to subscriber equipment instruction by high-level signaling.
In tradition CSI feedback aperiodic, a CSI fed back in subframe n corresponds to a CSIreferenceresource (reference resources) in sequential, CSIreferenceresource corresponds to subframen-k in sequential, and k is a positive integer here.Aperiodic CSI feedback will have PDCCH to excite (trigger): UE feeds back CSI after receiving the PDCCH of eNB transmission in corresponding PUSCH uplink subframe.The referenceresource of CSI can be the subframe that PDCCH sends, and certain subframe before also can being PDCCH subframe, its sequential relationship clearly should define in eNB/UE both sides.To with the CSI of non-periodic feedback, the account form of this CSIreferenceresource is feasible equally, such as eNB sends a PDCCH and excites CSI feedback, according to the sub-frame of uplink of CSI feedback, namely eNB can calculate the subframe of CSIreferenceresource, so the CSI that each PDCCH excites determines corresponding to a descending vertical dimensions wave beam formed matrix.Or which CSIreferenceresource subframe the CSI that can be fed back by signaling UE in PDCCH correspond to.Such as, as shown in Figure 4, suppose that eNB has 4 wave beam formed matrixes in vertical dimensions, eNB configures a CSI-RS, uses the vertical dimensions wave beam that four different in four different descending sub frames; Then eNB can add the territory (field) of a new 2-bit in descending PDCCH, this field notifies which CSIreferenceresource subframe UE should use to measure CSI in the subframe of uplink feedback, such as 2-bitfield is 1, then measure/feed back first CSIreferenceresource subframe before PDCCH subframe, if 2-bitfield is 2, then measure/feed back second CSIreferenceresource subframe before PDCCH subframe, etc.
As an example, suppose that eNB has four vertical dimensions wave beam formed matrixes, a CSI-RS is configured to UE, the cycle of CSI-RS is 10ms, eNB uses four wave beam formed matrix traversal figurations respectively at the different cycles of a CSI-RS, the actual cycle then corresponding to the CSI-RS subframe of some particular beam figuration matrixes is 40ms, in order to control UE does not use the CSI-RS cycle corresponding to different beams figuration matrix to carry out measuring and feeding back CSI when measurement CSI, then eNB needs certain mechanism control UE and in which descending CSI-RS subframe, carries out channel measurement for a up CSI feedback.Here several possible solution is had.As a kind of scheme, for a CSI feedback process, eNB can configure the cycle P1 allowing UE to be used for carrying out the CSI-RS subframe of channel measurement, such as P1=40ms, this cycle will be able to be grown than the cycle P (such as P=10ms) of CSI-RS, configures to the subframe of the actual cycle P1 of the CSI-RS of channel measurement only time UE feeds back CSI to use.This Method compare is applicable to periodic feedback CSI.Such as UE needs to send CSI at sub-frame of uplink n, CSIreferenceresource corresponds to descending sub frame n-k, k>=0, so UE must use the subframe that the cycle comprising CSI-RS being not later than CSIreferenceresource is P1 to carry out channel measurement.In addition, eNB also can be used for measuring the quantity N of CSI-RS subframe that channel uses, then time UE feeds back a CSI, only to measure by no more than N number of CSI-RS subframe by high-rise semi-static signaling or dynamic signaling configuration UE.Above two kinds of methods can also coordinate enforcement, such as eNB can configuration UE use the CSI that actual cycle is P1=40ms to measure, each CSI measures UE and only allows use to be no more than N=2 CSI-RS subframe, then UE should use the subframe that no more than 2 cycles being not later than CSIreferenceresource are P1=40ms to measure when actual measurement CSI.In addition, CSI-RS subframe can be divided into several groups of subframe subsets to configure to UE by eNB, and for a CSI feedback, which subframe subset is eNB configuration UE use carry out CSI measurement.This mode is applicable to periodically CSI feedback, is also applicable to aperiodicity feedback.
Alternatively example, CSI-RS subframe can be divided into four groups of subframe subsets to configure to UE by eNB, for a CSI feedback, which subframe subset is 2-bittriggerfield configuration UE in PDCCH use carry out CSI measurement, such as 2-bitfield is 1, then measure the CSI-RS subframe being not later than PDCCH place subframe in first CSI-RS subframe subset, if 2-bitfield is 2, then measure the CSI-RS subframe being not later than PDCCH place subframe in second CSI-RS subframe subset.
The implementation of the method that the embodiment of the present invention provides in UE side as shown in Figure 5, specifically comprises following operation:
Step 500, on pilot resources, carry out pilot measurement, wherein, the different subframes at same pilot resources place adopt different wave beam formed matrixes to carry out wave beam forming;
Step 510, feedback carry out the measurement result of channel measurement.
There is the technical characteristic identical with network side in the implementation of UE side, repeat no more herein.
Preferably, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
Preferably, step 500 comprises: according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, described channel measurement subframe is used to indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place;
The subframe determined carries out channel measurement.
According in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, comprising:
According to the indication information that may be used for the quantity of the subframe of carrying out channel measurement in the subframe of described pilot resources place, determine in the subframe at pilot resources place for carrying out the subframe of channel measurement.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, comprising:
According in the subframe at the channel measurement cycle received and sub-frame offset determination pilot resources place for carrying out the subframe of channel measurement, described channel measurement cycle is the cycle integral multiple of described pilot resources.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, comprising:
According to may be used in the subframe at the indication information determination pilot resources place of the subset of the subframe of carrying out channel measurement for carrying out the subframe of channel measurement of receiving, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Preferably, the indication information that may be used for the subset of the subframe of carrying out channel measurement described in is carried at and excites in feedback signaling.
Below with in 3DMIMO system, it is example that base station and UE side coordinate enforcement to realize vertical beam figuration, is illustrated the technical scheme that the embodiment of the present invention provides.
Base station configures a CSI-RS to UE, and by high-level signaling, the configuration information of this CSI-RS is sent to this UE, at least comprises period of sub-frame and the sub-frame offset of this CSI-RS in this configuration information.
Send subframe (i.e. the subframe at CSI-RS place) at different CSI-RS, base station adopts different vertical beam figuration matrixes to carry out vertical beam figuration to the CSI-RS sent.Each CSI-RS sends the vertical beam figuration matrix that subframe adopts and adopts the method for traversal to determine from all vertical beam figurations matrix of base station.Thus, although UE is just configured a CSI-RS, in the middle of the different subframes at this CSI-RS place, UE can measure the channel status after different vertical wave beam forming.
UE periodically or aperiodically feeds back CSI and/or RSRP, and each CSI and/or RSRP feedback is a corresponding independent subframe in time, also sends subframe for CSI-RS after an independent employing vertical beam figuration.Thus, send according to UE CSI and/or RSRP of returning, base station can obtain the signal strength signal intensity after for different vertical wave beam forming and channel parameter information.Base station, according to this information, can judge best vertical beam figuration matrix.
{ V1, V2, V3, V4} can select to suppose there are four vertical beam figuration matrixes in base station.As shown in Figure 6, send subframe N at CSI-RS, base station adopts V1 to CSI-RS figuration, sends subframe N+a+b at CSI-RS, and base station adopts V2 to CSI-RS figuration, and by parity of reasoning.Send at CSI-RS the CSI-RS that subframe N, UE measure corresponding vertical beam figuration matrix V 1, then feed back in subframe N+a.Wherein, a and b be not less than 0 integer, and a+b>=1.It should be noted that in the example depicted in fig. 6 in addition, feedback is all that a subframe after CSI-RS sends is carried out, but in systems in practice, the interval that the CSI-RS of feedback subframe and its correspondence sends between subframe can change.Such as different CSI-RS sends subframe can be different from the time interval of corresponding feedback subframe.About feedback configuration, in Fig. 6, each CSI and/or RSRP is periodic feedback.In systems in practice, also each CSI and/or RSRP can be made to use aperiodicity feedback, or some CSI and/or RSRP also can be made to be configured to periodic feedback, and other CSI and/or RSRP are configured to aperiodicity feedback, are excited when needs by base station.For CSI and/or RSRP of periodic feedback, the cycle of each CSI and/or RSRP feedback and sub-frame offset etc. can separate configurations.In addition, the measurement result that also multiple CSI-RS can be sent subframe is placed in same feedback subframe to be fed back, and uses more jumbo Physical Uplink Control Channel (PUCCH) or uses Physical Uplink Shared Channel (PUSCH).It should be noted that, 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 configured with a CSI-RS to UE, by adopting different vertical beam figuration matrixes in this CSI-RS in different CSI-RS transmission subframe, UE can report the information (CSI and/or RSRP) corresponding to different vertical dimensions wave beam formed matrixes, makes base station obtain the channel information after corresponding to different vertical wave beam forming.
Above-mentioned processing procedure is described for vertical beam figuration, and method of the present invention may be used for horizontal beam figuration equally, and method is identical, repeats no more.
As can be seen here, at subframe N+4a+3b end place, base station obtains the complete measurement result information for all vertical beam figuration matrixes.Base station can select best vertical beam figuration matrix thus.By subframe N+4a+3b, the traversal mode adopting same vertical beam figuration matrix can be continued in base station, and as shown in Figure 6, but this makes the CSI feedback cycle for best vertical beam figuration matrix actually increase four times.Another kind method, then, by subframe N+4a+3b, base station sends subframe at each CSI-RS and adopts the best vertical beam figuration matrix chosen, as shown in Figure 7.Namely start thus, the CSI of each feedback is the CSI for best vertical beam figuration matrix.
It is pointed out that the situation that the method that the embodiment of the present invention provides is configured with multiple pilot resources for base station still can be used.The pilot resources of each configuration can adopt no wave beam formed matrix in different subframes, the circulation pattern of the wave beam formed matrix that the subframe at each pilot resources place adopts can be configured by base station.
Based on the inventive concept same with method, the invention process also provides the dispensing device of the pilot tone in a kind of mimo system, as shown in Figure 8, comprising:
Wave beam forming module 801, carries out wave beam forming for adopting different wave beam formed matrixes in the different subframes at same pilot resources place;
Pilot signal sending module 802, for sending through the data of wave beam forming and/or pilot signal to subscriber equipment in each subframe at pilot resources place.
The technical scheme that the embodiment of the present invention provides, different horizontal or vertical wave beam formed matrixes is adopted to carry out wave beam forming in the different subframes at same pilot resources place, therefore, can the quantity of flexible configuration pilot resources according to actual needs, thus meet actual transmissions demand, improve systematic function.Such as, the pilot resources of configuration can be less than horizontal or vertical wave beam formed matrix, thus decreases the expense of pilot resources.Owing to decreasing pilot resources, therefore, the pilot tone feedback overhead of UE decreases.If only configure a pilot resources, then pilot-frequency expense will reduce greatly.In like manner, if adopt wave beam formed matrix to carry out wave beam forming to the resource for channel measurement, its pilot resources expense is little, and the pilot tone feedback overhead of UE is little.
Preferably, also comprise configuration module, for:
The subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place is indicated to described subscriber equipment.
Preferably, described configuration module is used for:
The quantity that may be used for the subframe of carrying out channel measurement in the subframe of described pilot resources place is indicated to described subscriber equipment.
Preferably, described configuration module is used for:
To described subscriber equipment indicating channel measuring period and sub-frame offset, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
Preferably, described configuration module is used for:
May be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Preferably, when may be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, described configuration module is used for:
The subset of the subframe of carrying out channel measurement is may be used for described subscriber equipment instruction by exciting feedback signaling.
Preferably, for the quantity of the pilot resources of described user device configuration is less than the quantity of adopted wave beam formed matrix.
Preferably, also comprise wave beam formed matrix and select module, for the measurement result fed back after carrying out channel measurement according to described subscriber equipment, from adopted wave beam formed matrix, select at least one wave beam formed matrix.
Preferably, the wave beam formed matrix that the different subframes at same pilot resources place adopt is determined by the mode of each wave beam formed matrix corresponding to pilot resources described in searching loop.
Preferably, before the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is that the mode by traveling through each wave beam formed matrix corresponding to described pilot resources is determined; After the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is the wave beam formed matrix selected.
Preferably, described measurement result comprises described subscriber equipment carries out channel measurement within a predetermined period of time measured value to each subframe at each pilot resources place.
Based on the inventive concept same with method, the invention process also provides a kind of base station 900, as shown in Figure 9, comprising:
Processor 901, this processor 901 is configured to the computer program performing following function: adopt different wave beam formed matrixes to carry out wave beam forming in the different subframes at same pilot resources place; Each subframe at pilot resources place send through the data of wave beam forming and/or pilot signal to subscriber equipment;
Memory 902, this memory 902 is configured to the code preserving above computer program.
The technical scheme that the embodiment of the present invention provides, different horizontal or vertical wave beam formed matrixes is adopted to carry out wave beam forming in the different subframes at same pilot resources place, therefore, can the quantity of flexible configuration pilot resources according to actual needs, thus meet actual transmissions demand, improve systematic function.Such as, the pilot resources of configuration can be less than horizontal or vertical wave beam formed matrix, thus decreases the expense of pilot resources.Owing to decreasing pilot resources, therefore, the pilot tone feedback overhead of UE decreases.If only configure a pilot resources, then pilot-frequency expense will reduce greatly.In like manner, if adopt wave beam formed matrix to carry out wave beam forming to the resource for channel measurement, its pilot resources expense is little, and the pilot tone feedback overhead of UE is little.
Preferably, for the quantity of the pilot resources of described user device configuration is less than the quantity of adopted wave beam formed matrix.
Preferably, processor 901 is also configured to perform the computer program possessing following function: the measurement result fed back after carrying out channel measurement according to described subscriber equipment, from adopted wave beam formed matrix, selecting at least one wave beam formed matrix, carrying out wave beam forming to adopt at least one wave beam formed matrix of selection to sending to the downstream signal of described subscriber equipment; Memory 902 is also configured to the code preserving above computer program.
Preferably, the wave beam formed matrix that the different subframes at same pilot resources place adopt is determined by the mode of each wave beam formed matrix corresponding to pilot resources described in circulation searching loop.
Preferably, before the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is that the mode by traveling through each wave beam formed matrix corresponding to described pilot resources is determined; After the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is the wave beam formed matrix selected.
Preferably, described measurement result comprises described subscriber equipment carries out channel measurement within a predetermined period of time measured value to each subframe at each pilot resources place.
Based on the inventive concept same with method, the embodiment of the present invention also provides the means for channel measurement in a kind of mimo system, as shown in Figure 10, comprising:
Pilot measurement module 1001, for carrying out pilot measurement on pilot resources, wherein, the different subframes at same pilot resources place adopts different wave beam formed matrixes to carry out wave beam forming;
Measurement feedback module 1002, for feeding back the measurement result of carrying out channel measurement.
Preferably, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
Preferably, described pilot measurement module is used for:
According in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, described channel measurement subframe is used to indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place;
The subframe determined carries out channel measurement.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described pilot measurement module is used for:
According to the indication information that may be used for the quantity of the subframe of carrying out channel measurement in the subframe of described pilot resources place, determine in the subframe at pilot resources place for carrying out the subframe of channel measurement.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described pilot measurement module is used for:
According in the subframe at the channel measurement cycle received and sub-frame offset determination pilot resources place for carrying out the subframe of channel measurement, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
Preferably, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described pilot measurement module is used for:
According to may be used in the subframe at the indication information determination pilot resources place of the subset of the subframe of carrying out channel measurement for carrying out the subframe of channel measurement of receiving, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
Preferably, the indication information that may be used for the subset of the subframe of carrying out channel measurement described in is carried at and excites in feedback signaling.
Based on the inventive concept same with method, the embodiment of the present invention also provides a kind of subscriber equipment 1100, as shown in figure 11, comprising:
Processor 1101, this processor 1101 is configured to perform the computer program possessing following function: on pilot resources, carry out pilot measurement, wherein, the different subframes at same pilot resources place adopts different wave beam formed matrixes to carry out wave beam forming; Feedback carries out the measurement result of channel measurement;
Memory 1102, this memory 1102 is configured to the code preserving above computer program.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.

Claims (40)

1. the pilot sending method in mimo system, is characterized in that, comprising:
Different wave beam formed matrixes is adopted to carry out wave beam forming in the different subframes at same pilot resources place;
Each subframe at described pilot resources place sends through the data of wave beam forming and/or pilot signal to subscriber equipment.
2. method according to claim 1, is characterized in that, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
3. method according to claim 1, is characterized in that, the method also comprises:
The subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place is indicated to described subscriber equipment.
4. method according to claim 3, is characterized in that, indicates the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place, comprising to described subscriber equipment:
The quantity that may be used for the subframe of carrying out channel measurement in the subframe of described pilot resources place is indicated to described subscriber equipment.
5. the method according to claim 3 or 4, is characterized in that, indicates the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place, comprising to described subscriber equipment:
To described subscriber equipment indicating channel measuring period and sub-frame offset, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
6. method according to claim 3, is characterized in that, indicates the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place, comprising to described subscriber equipment:
May be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
7. method according to claim 6, is characterized in that, may be used for the subset of the subframe of carrying out channel measurement, comprising to described subscriber equipment instruction:
The subset of the subframe of carrying out channel measurement is may be used for described subscriber equipment instruction by exciting feedback signaling.
8. the method according to any one of Claims 1 to 4, is characterized in that, the method also comprises:
The measurement result fed back after carrying out channel measurement according to described subscriber equipment, selects at least one wave beam formed matrix from adopted wave beam formed matrix.
9. method according to claim 8, is characterized in that, the wave beam formed matrix that the different subframes at same pilot resources place adopt is determined by the mode of each wave beam formed matrix corresponding to pilot resources described in searching loop.
10. method according to claim 8, it is characterized in that, before the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is that the mode by traveling through each wave beam formed matrix corresponding to described pilot resources is determined;
After the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is the wave beam formed matrix selected.
11. methods according to any one of Claims 1 to 4, it is characterized in that, the quantity for the pilot resources of described user device configuration is less than the quantity of adopted wave beam formed matrix.
12. methods according to claim 11, is characterized in that, the quantity for the pilot resources of described user device configuration is 1.
13. methods according to any one of Claims 1 to 4, it is characterized in that, described measurement result comprises described subscriber equipment carries out channel measurement within a predetermined period of time measured value to each subframe at each pilot resources place.
Channel measuring method in 14. 1 kinds of mimo systems, is characterized in that, comprising:
Pilot resources carries out pilot measurement, wherein, the different subframes at same pilot resources place adopts different wave beam formed matrixes to carry out wave beam forming;
Feedback carries out the measurement result of channel measurement.
15. methods according to claim 14, is characterized in that, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
16. methods according to claim 14, is characterized in that, pilot resources carries out pilot measurement, comprising:
According in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, described channel measurement subframe is used to indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place;
The subframe determined carries out channel measurement.
17. methods according to claim 16, is characterized in that, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, comprising:
According to the indication information that may be used for the quantity of the subframe of carrying out channel measurement in the subframe of described pilot resources place, determine in the subframe at pilot resources place for carrying out the subframe of channel measurement.
18. methods according to claim 16 or 17, is characterized in that, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, comprising:
According in the subframe at the channel measurement cycle received and sub-frame offset determination pilot resources place for carrying out the subframe of channel measurement, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
19. methods according to claim 17, is characterized in that, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, comprising:
According to may be used in the subframe at the indication information determination pilot resources place of the subset of the subframe of carrying out channel measurement for carrying out the subframe of channel measurement of receiving, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
20. methods according to claim 19, is characterized in that, described in may be used for the subset of the subframe of carrying out channel measurement indication information be carried at and excite in feedback signaling.
Pilot tone dispensing device in 21. 1 kinds of mimo systems, is characterized in that, comprising:
Wave beam forming module, carries out wave beam forming for adopting different wave beam formed matrixes in the different subframes at same pilot resources place;
Pilot signal sending module, sends through the data of wave beam forming and/or pilot signal to subscriber equipment in each subframe at described pilot resources place.
22. devices according to claim 21, is characterized in that, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
23. devices according to claim 21, is characterized in that, also comprise configuration module, for:
The subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place is indicated to described subscriber equipment.
24. devices according to claim 23, is characterized in that, described configuration module is used for:
The quantity that may be used for the subframe of carrying out channel measurement in the subframe of described pilot resources place is indicated to described subscriber equipment.
25. devices according to claim 23 or 24, it is characterized in that, described configuration module is used for:
To described subscriber equipment indicating channel measuring period and sub-frame offset, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
26. devices according to claim 23, is characterized in that, described configuration module is used for:
May be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
27. devices according to claim 26, is characterized in that, when may be used for the subset of the subframe of carrying out channel measurement to described subscriber equipment instruction, described configuration module is used for:
The subset of the subframe of carrying out channel measurement is may be used for described subscriber equipment instruction by exciting feedback signaling.
28. devices according to any one of claim 21 ~ 24, it is characterized in that, also comprise wave beam formed matrix and select module, for the measurement result fed back after carrying out channel measurement according to described subscriber equipment, from adopted wave beam formed matrix, select at least one wave beam formed matrix.
29. devices according to claim 28, is characterized in that, the wave beam formed matrix that the different subframes at same pilot resources place adopt is determined by the mode of each wave beam formed matrix corresponding to pilot resources described in searching loop.
30. devices according to claim 28, it is characterized in that, before the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is that the mode by traveling through each wave beam formed matrix corresponding to described pilot resources is determined;
After the measurement result that whole wave beam formed matrixes that acquisition adopts are corresponding, the wave beam formed matrix that the different subframes at same pilot resources place adopt is the wave beam formed matrix selected.
31. devices according to any one of claim 21 ~ 24, it is characterized in that, the quantity for the pilot resources of described user device configuration is less than the quantity of adopted wave beam formed matrix.
32. devices according to claim 31, is characterized in that, the quantity for the pilot resources of described user device configuration is 1.
33. devices according to any one of claim 21 ~ 24, it is characterized in that, described measurement result comprises described subscriber equipment carries out channel measurement within a predetermined period of time measured value to each subframe at each pilot resources place.
Means for channel measurement in 34. 1 kinds of mimo systems, is characterized in that, comprising:
Pilot measurement module, for carrying out pilot measurement on pilot resources, wherein, the different subframes at same pilot resources place adopts different wave beam formed matrixes to carry out wave beam forming;
Measurement feedback module, for feeding back the measurement result of carrying out channel measurement.
35. devices according to claim 34, is characterized in that, the quantity of pilot resources is less than the quantity of wave beam formed matrix.
36. devices according to claim 34, is characterized in that, described pilot measurement module is used for:
According in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement, described channel measurement subframe is used to indicate the subframe that may be used for carrying out channel measurement in the subframe at described pilot resources place;
The subframe determined carries out channel measurement.
37. devices according to claim 36, is characterized in that, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described pilot measurement module is used for:
According to the indication information that may be used for the quantity of the subframe of carrying out channel measurement in the subframe of described pilot resources place, determine in the subframe at pilot resources place for carrying out the subframe of channel measurement.
38. devices according to claim 36 or 37, is characterized in that, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described pilot measurement module is used for:
According in the subframe at the channel measurement cycle received and sub-frame offset determination pilot resources place for carrying out the subframe of channel measurement, described channel measurement cycle is the integral multiple in the cycle of described pilot resources.
39., according to device according to claim 37, is characterized in that, according in the subframe at the channel measurement subframe indication information determination pilot resources place received for carrying out the subframe of channel measurement time, described pilot measurement module is used for:
According to may be used in the subframe at the indication information determination pilot resources place of the subset of the subframe of carrying out channel measurement for carrying out the subframe of channel measurement of receiving, wherein, the pilot signal subframe at described pilot resources place is divided into some subsets that may be used for the subframe of carrying out channel measurement.
40., according to device according to claim 39, is characterized in that, described in may be used for the subset of the subframe of carrying out channel measurement indication information be carried at and excite in feedback signaling.
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