CN101541085A - Sending and using method of measure-reference signals - Google Patents

Sending and using method of measure-reference signals Download PDF

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CN101541085A
CN101541085A CN200910135587A CN200910135587A CN101541085A CN 101541085 A CN101541085 A CN 101541085A CN 200910135587 A CN200910135587 A CN 200910135587A CN 200910135587 A CN200910135587 A CN 200910135587A CN 101541085 A CN101541085 A CN 101541085A
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resource block
reference signals
reference signal
measuring reference
subframe
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CN101541085B (en
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戴博
郁光辉
陈艺戬
李卫军
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ZTE Corp
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ZTE Corp
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

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Abstract

A sending and using method of measure-reference signals comprises the steps of: bearing the measure-reference signals of the same reference signal group into the same resource block to send and respectively bearing the measure-reference signals of different reference signal groups into different resource blocks to send, wherein the reference signal group of number i contains Ni measure-reference signals used for the measure of channel state information, each reference signal group contains different measure-reference signals, Ni is not less than 1, i is equal to 1 to K, and K is a positive integer. The adoption of the method guarantees transmission property simultaneously when ensuring less reference signal expenses as much as possible, and can be compatible with the existing LTE system well, thus realizing high-order MIMO transmission and improving the overall performance of the system.

Description

A kind of transmission of measuring reference signals and using method
Technical field
The present invention relates to the communications field, relate in particular to a kind of transmission and using method of measuring reference signals.
Background technology
On OFDM (Orthogonal Frequency Division Multiplexing the is called for short OFDM) technological essence is a kind of multi-carrier modulation communication technology, and this technology is one of core technology in the 4th generation (4G) mobile communication system.On frequency domain, the multipath channel of OFDM presents the frequency selective fading characteristic, in order to overcome this decline, channel is divided into a plurality of subchannels on frequency domain, the spectral characteristic of each subchannel is near flat all, and each subchannel of OFDM is mutually orthogonal, therefore allows the frequency spectrum of subchannel overlapped, thereby can very big limit land productivity frequency spectrum resource.
MIMO (Multiple Input and Multiple Output, multiple-input and multiple-output) technology can increase power system capacity, improve transmission performance, and can merge with other physical-layer techniques well, therefore become the key technology of B3G (Beyond 3rd Generation, super 3G) and 4G mobile communication system.But when channel relevancy was strong, the diversity gain and the spatial multiplexing gain that are brought by multipath channel reduced greatly, cause declining to a great extent of mimo system performance.Propose a kind of new MIMO method for precoding in recent years, this method is a kind of multiplex mode of MIMO efficiently, and its precoding processing by the sending and receiving end changes into a plurality of independently pseudo channels with mimo channel.Because effectively eliminated the influence of channel relevancy, so precoding technique has guaranteed the stability of mimo system under various environment.
Long Term Evolution (Long Term Evolution is called for short LTE) system is the essential planning of third generation partnership (3GPP).Adopt in system under the situation of regular circulation prefix, time slot comprises on 7/descending symbol, adopts in system under the situation of extended cyclic prefix, and time slot comprises on 6/descending symbol.A Resource Unit (Resource Element, be called for short RE) be a subcarrier in the OFDM symbol, and a downlink resource piece (Resource Block, be called for short RB) constitute by continuous 12 subcarriers and continuous 7 (under the situation that adopts extended cyclic prefix is 6) OFDM symbols, being 180kHz on frequency domain, is a general time slots length on the time domain.When resource allocation, be that base unit distributes with the Resource Block.
The LTE system supports the MIMO of 4 antennas to use, corresponding antenna port #0, antenna port #1, antenna port #2, antenna port #3 adopt sub-district publicly-owned measuring reference signals (the Cell-specificreference signals of full bandwidth, be called for short CRS) mode, at Cyclic Prefix is under the situation of regular circulation prefix, these publicly-owned measuring reference signals positions in Physical Resource Block as shown in Figure 1a, at Cyclic Prefix is under the situation of extended cyclic prefix, these publicly-owned measuring reference signals in the position in the Physical Resource Block shown in Fig. 1 b.In addition, also has the proprietary measuring reference signals of a kind of user (UE-specific referencesignals), this measuring reference signals is only transmitted on the time-frequency domain position at the proprietary Physical Shared Channel of user (Physical downlinkshared channel is called for short PDSCH) place.Wherein, the function of the publicly-owned measuring reference signals in sub-district comprises down channel quality measurement and down channel estimation (demodulation).
LTE-Advanced (senior Long Term Evolution) is the evolution version of LTE Release-8 (LTE version 8).Except that satisfying or surpassing 3GPP TR 25.913: all related needs of " Requirements for Evolved UTRA (E-UTRA) and Evolved UTRAN (E-UTRAN) " (" demand of the global communication wireless access of evolution and the global communication wireless access network of evolution "), also to meet or exceed the demand of the IMT-Advanced (InternationalMobile Telecommunication advanced, senior international mobile communication) of ITU-R (wireless department of Union of International Telecommunication) proposition.Wherein, the demand with LTE Release-8 backward compatibility is meant: the terminal of LTE Release-8 can be worked in the network of LTE-Advanced; The terminal of LTE-Advanced can be worked in the network of LTE Release-8.
In addition, LTE-Advanced should be able to comprise frequency spectrum configuration (as the continuous frequency spectrum resource of 100MHz) the down work wideer than LTE Release-8, to reach higher performance and target peak speed in the frequency spectrum configuration of different sizes.Because the LTE-Advanced network needs to insert LTE user, so its operational frequency bands need cover present LTE frequency band, has not had the spectral bandwidth of assignable continuous 100MHz on this frequency range.So the technical problem that LTE-Advanced need solve is that several continuous component carrier frequency (frequency spectrum) (Component carrier) polymerizations that are distributed on the different frequency range are got up to form the operable 100MHz bandwidth of LTE-Advanced.Frequency spectrum after promptly assembling is divided into n component carrier frequency (frequency spectrum), and the frequency spectrum in each component carrier frequency (frequency spectrum) is continuous.
The clear and definite descending application that can support 8 antennas at most of LTE-Advanced among demand research report TR 36.814 V0.1.1 of the LTE-Advanced that proposes in September, 2008; The design basic framework (Way forward) of the LTE-Advanced downstream measurement reference signal of the clear and definite application of supporting 8 antennas and CoMP (multipoint cooperative transmission), double-current Beamforming technology such as (wave beam formation) in the 56th meeting of the 3GPP in February in 2009, the downstream measurement reference signal of LTE-Advanced is defined as two types measuring reference signals: be used to carry out the measuring reference signals of PDSCH demodulation and be used for channel condition information (Channel Status Information, CSI) measuring reference signals of Ce Lianging.
At present, the sending method that does not also have the measuring reference signals that is used for the channel condition information measurement of LTE-Advanced.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the deficiencies in the prior art, and a kind of sending method that is used for the measuring reference signals that channel condition information measures is provided.
In order to address the above problem, the invention provides a kind of transmission and using method of measuring reference signals, this method comprises:
Measuring reference signals in the same reference sets of signals is carried in the identical Resource Block sends, the measuring reference signals in the different reference signal groups is carried on respectively in the different Resource Block sends;
Wherein, comprise N in i reference signal group iThe individual measuring reference signals that is used for the channel condition information measurement; Comprise different measuring reference signals in each reference signal group;
N i〉=1, i=1 ..., K, K are positive integer.
In addition, the measuring reference signals that comprises same number in each reference signal group.
In addition, all available resource block are divided into the Resource Block group in regular turn, described Resource Block group is made up of P continuous Resource Block, comprises different Resource Block in the different Resource Block groups;
Use the h in the described Resource Block group iIndividual Resource Block carries i the measuring reference signals in the reference signal group;
Wherein, 1≤h i≤ P, P 〉=K.
In addition, i reference signal group is carried on the (j+ (i-1) * h in the described Resource Block group i+ f) send in mod P Resource Block;
Wherein, j=1 ..., h i, described f is fixing constant, or f by: cell identifier and/or subframe index and/or component carrier frequency index are determined.
In addition, h i=1, P=2 * K;
I reference signal group is carried in P Resource Block of (i+f) mod in the described Resource Block group and sends; Or
I reference signal group is carried in P Resource Block of (2i-1+f) mod in the described Resource Block group and sends; Or
I reference signal group is carried in P Resource Block of (2i+f) mod in the described Resource Block group and sends;
Wherein, described f is fixing constant, or f by: cell identifier CellId and/or subframe index SubFramIndex and/or component carrier frequency index CCIndex determine.
In addition, f=CellId or f=SubFramIndex or f=CCIndex or f=CCIndex+SubFramIndex+CellId or f=CCIndex+SubFramIndex or f=CCIndex+CellId or f=SubFramIndex+CellId or f=0.
In addition, each measuring reference signals is carried on: on last 1 orthogonal frequency division multiplex OFDM symbol of subframe or be carried on the 4th OFDM symbol of inverse of subframe or be carried on the 6th the OFDM symbol of first time slot of subframe or be carried on last 1 OFDM symbol of first time slot of subframe; Or be carried on the 3rd OFDM symbol of inverse of subframe.
In addition, measuring reference signals is carried on following any two different OFDM symbols: the 6th OFDM symbol of first time slot of subframe, last 1 OFDM symbol of first time slot of subframe, last 1 the OFDM symbol of subframe, subframe the 4th OFDM symbol reciprocal; Or
Measuring reference signals is carried on following any two different OFDM symbols: the 3rd symbol of inverse of the 1st OFDM symbol of second time slot of subframe, the 2nd OFDM symbol of second time slot of subframe, each time slot.
In addition, measuring reference signals takies g Resource Unit in the Resource Block of its transmission of carrying, wherein, and 1≤g≤12;
When g＞1, the frequency domain interval of measuring reference signals in the Resource Block of its transmission of carrying is
Figure A20091013558700081
In addition, in reference signal group i, comprise N iDuring individual measuring reference signals, the frequency domain interval in the Resource Block that carrying reference signal group i sends between the different measuring reference signal is
Figure A20091013558700091
N i＞1.
In addition, the different measuring reference signal in the same reference signal group sends on identical time-frequency position, adopts sign indicating number branch mode multiplexing.
In addition, use described measuring reference signals and publicly-owned measuring reference signals that m antenna logic port carried out the channel status measurement or use described measuring reference signals that m antenna logic port carried out the channel status measurement;
Wherein, m=1 or 2 or 4 or 6 or 8.
In addition, the corresponding different antenna logic port of each measuring reference signals; The order of each measuring reference signals according to the antenna logical port number is divided in described K the reference signal group.
In sum, adopt method of the present invention, in the reference signal expense that guarantees to try one's best few, guaranteed transmission performances, and can well be compatible existing LTE system, thereby realize high-order MIMO transmission, improve the overall performance of system.
Description of drawings
Fig. 1 a and Fig. 1 b are the schematic diagrames of the publicly-owned reference signal of LTE system cell position in Physical Resource Block;
Fig. 2 a and Fig. 2 b are the position view of first embodiment of the invention measuring reference signals in Physical Resource Block;
Fig. 3 a and Fig. 3 b are the position view of second embodiment of the invention measuring reference signals in Physical Resource Block;
Fig. 4 a and Fig. 4 b are the position view of third embodiment of the invention measuring reference signals in Physical Resource Block;
Fig. 5 a and Fig. 5 b are the position view of fourth embodiment of the invention measuring reference signals in Physical Resource Block;
Fig. 6 a and Fig. 6 b are the position view of fifth embodiment of the invention measuring reference signals in Physical Resource Block.
Embodiment
Core concept of the present invention is that the newly-increased measuring reference signals that is used for the channel condition information measurement is divided into K group (being called the reference signal group) with all measuring reference signals, comprises N in i the reference signal group iMeasuring reference signals in the individual measuring reference signals, same reference sets of signals sends in identical Resource Block (RB), and the measuring reference signals in the different reference signal groups sends in different Resource Block;
Wherein, N i〉=1, i=1 ..., K, K are positive integer; Preferably, K can equal 1 or 2 or 3 or 4 or 8.
Preferably, the quantity of the measuring reference signals that comprises in each reference signal group is identical, i.e. N 1=N 2...=N K
To the transmission and the using method of measuring reference signals of the present invention be briefly described below.
Figure A20091013558700101
The frequency domain mapping relations of reference signal group
All available resource block on the frequency domain can be divided into M according to the size order of Resource Block index iIndividual Resource Block group is used to carry the measuring reference signals of i reference signal group, preceding M iRespectively comprise P in-1 Resource Block group iIndividual Resource Block, M iThe number of the Resource Block that comprises in the individual Resource Block group is less than or equals P iThe Resource Block index that comprises in each Resource Block group is different;
Wherein, i is the sequence number of reference signal group, i=1 ..., K, M iAnd P iBe positive integer.
Preferably, P 1=P 2=...=P K, the measuring reference signals in K reference signal group sends in a Resource Block group.Hereinafter, work as P 1=P 2=...=P KThe time, with P iBe designated as P.
Use the h in each Resource Block group iIndividual Resource Block carries i the measuring reference signals in the reference signal group; Wherein, 1≤h i≤ P i
The P that can from each Resource Block group, comprise iFixedly choose h in the individual Resource Block iIndividual Resource Block; Perhaps according to information such as the number of times that sends, radio frame number from P iChoice of dynamical h in the individual Resource Block iIndividual continuous Resource Block.Described choice of dynamical can be with h iIndividual Resource Block is that the unit circulation is chosen.
The mapping relations of reference signal group and Resource Block can be that i reference signal group is mapped on X the Resource Block, wherein:
X=(j+t (i)+f) mod P Max,
Figure A20091013558700102
Perhaps, t (i)=i-1, perhaps,
Figure A20091013558700103
Wherein, j=1 ..., h iK is the number of reference signal group; P Max=max{P i, i=1 ..., K}.
F is fixing constant (for example, 0), or f is determined by cell identifier (CellId) and/or subframe index (SubFramIndex) and/or component carrier frequency index (CCIndex).
For example, f=0 or f=CellId or f=SubFramIndex or f=CCIndex or f=CCIndex+SubFramIndex+CellId or f=CCIndex+SubFramIndex or f=CCIndex+CellId or f=SubFramIndex+CellId.
The time domain mapping relations of reference signal group
In a subframe, all measuring reference signals are carried on 1 or 2 the OFDM symbols, on OFDM symbol of measuring reference signals carrying of each antenna logic port.
When using the whole measuring reference signals of 1 OFDM symbols carry: measuring reference signals is carried on last 1 OFDM symbol of subframe or is carried on the 4th OFDM symbol of inverse of a subframe or is carried on the 6th the OFDM symbol of first time slot in the subframe or is carried on last 1 OFDM symbol of first time slot in the subframe; Or be carried on the 3rd OFDM symbol of inverse of a subframe.
When using the whole measuring reference signals of 2 OFDM symbols carry: measuring reference signals is carried on the 6th the OFDM symbol of first time slot of subframe, on any two the different OFDM symbols in last 1 OFDM symbol of first time slot of subframe, last 1 the OFDM symbol of subframe and subframe the 4th the OFDM symbol reciprocal; Perhaps, under the unappropriated situation of publicly-owned measuring reference signals, measuring reference signals can be carried on the 1st, the 2nd OFDM symbol of second time slot of subframe, and in the 3rd symbol of the inverse of each time slot on any two different OFDM symbols.
Figure A20091013558700112
The frequency domain position of measuring reference signals in Resource Block
In a Resource Block, the RE number that reference signal group takies is q; Preferably, q=2 or 4 or 6 or 8.
The frequency domain interval of each measuring reference signals in the Resource Block of its transmission of carrying is m, supposes that in a Resource Block, the RE number that each measuring reference signals takies is g, and then the frequency domain interval of the measuring reference signals of same antenna logic port is in this Resource Block Preferably, g=2; The time-frequency position of each measuring reference signals in each Resource Block of its transmission of carrying is identical.
When different measuring reference signals sends on identical time-frequency position, adopt sign indicating number branch mode multiplexing.
The measuring reference signals of each antenna logic port can be determined by in cell identifier, component carrier frequency index, the subframe index one or more at the initial position of frequency domain, perhaps be disposed by high-level signaling.
The initial sub-carrier positions A of measuring reference signals in Resource Block is:
Figure A20091013558700121
Wherein, f is fixing constant (for example, 0), or f is determined by cell identifier (CellId) and/or subframe index (SubFramIndex) and/or component carrier frequency index (CCIndex).
For example, f=0 or f=CellId or f=SubFramIndex or f=CCIndex or f=CCIndex+SubFramIndex+CellId or f=CCIndex+SubFramIndex or f=CCIndex+CellId or f=SubFramIndex+CellId.
When comprising a plurality of measuring reference signals among the reference signal group i, the frequency domain interval between the identical measuring reference signals in this reference signal group is
Figure A20091013558700122
Frequency domain interval between the different measuring reference signal is
Figure A20091013558700123
N wherein iBe the measuring reference signals number that comprises among the reference signal group i.
Figure A20091013558700124
The occupation mode of measuring reference signals
Can use existing publicly-owned measuring reference signals to carry out channel status measures, perhaps use existing publicly-owned measuring reference signals and newly-increased proprietary measuring reference signals to carry out channel status and measure, perhaps only use newly-increased proprietary measuring reference signals to carry out channel status and measure; Specifically can be in the following way:
Mode 0: when antenna logic port number less than 4 the time, use the publicly-owned measuring reference signals of existing 4 antenna logic ports to carry out the measurement of channel condition information;
Mode 1: when antenna logic port number is 4, can use the publicly-owned measuring reference signals of existing 4 antenna logic ports to carry out the measurement of channel condition information; Perhaps newly-increased 4 measuring reference signals use 4 newly-increased channel status measuring reference signals to carry out the measurement of channel condition information;
Mode 2: when antenna logic port number was 6, newly-increased 2 measuring reference signals used the publicly-owned measuring reference signals of existing 4 antenna logic ports and 2 newly-increased measuring reference signals to carry out the measurement of channel condition information; Perhaps newly-increased 6 measuring reference signals use 6 newly-increased measuring reference signals to carry out the measurement of channel condition information;
Mode 3: when antenna logic port number was 8, newly-increased 4 measuring reference signals used the publicly-owned measuring reference signals of existing 4 antenna logic ports and 4 newly-increased measuring reference signals to carry out the measurement of channel condition information; Perhaps newly-increased 8 measuring reference signals use 8 newly-increased measuring reference signals to carry out the measurement of channel condition information.
Describe the present invention below in conjunction with drawings and Examples.
8 antenna logic ports are designated as: antenna logic port #0, antenna logic port #1, antenna logic port #2, antenna logic port #3, antenna logic port #4, antenna logic port #5, antenna logic port #6, antenna logic port #7; Its corresponding reference signal is designated as: reference signal #0 (T 1), reference signal #1 (T 2), reference signal #2 (T 3), reference signal #3 (T 4), reference signal #4 (T 5), reference signal #5 (T 6), reference signal #6 (T 7), reference signal #7 (T 8).
First embodiment
Fig. 2 is the position view of first embodiment of the invention measuring reference signals in Physical Resource Block.At Cyclic Prefix is under the situation of regular circulation prefix, and measuring reference signals shown in Fig. 2 a, is the situation of extended cyclic prefix under at Cyclic Prefix in the position in the Physical Resource Block, measuring reference signals in the position in the Physical Resource Block shown in Fig. 2 b.
In the present embodiment, suppose that the number of newly-increased measuring reference signals is 8, measuring reference signals is divided into K=8 reference signal group, comprise the measuring reference signals of an antenna logic port in each reference signal group.8 reference signal groups are designated as respectively: { #0}, { #1}, { #2}, { #3}, { #4}, { #5}, { #6}, { #7}.
In addition, in the present embodiment, P 1=P 2=...=P K=P=P Max
All available resource block are divided into a plurality of Resource Block groups in regular turn, comprise P=8 Resource Block, the h in each Resource Block group in each Resource Block group iThe measuring reference signals of a reference signal group of=1 Resource Block carrying;
Resource Block index in the Resource Block group is corresponding with the reference signal group index: P the Resource Block of (i+f) mod in the Resource Block group carries i the measuring reference signals in the reference signal group; F=0 wherein.
In a Resource Block, the RE number that reference signal group takies is q=2;
In a Resource Block, the RE number g=2 that measuring reference signals takies, the frequency domain interval between RE is 6;
The measuring reference signals of each antenna logic port is carried on last OFDM symbol of subframe;
Measuring reference signals in each reference signal group in corresponding Resource Block subcarrier A and subcarrier A+6 on send, wherein, A=0,1,2,3,4,5.
Second embodiment
Fig. 3 is the position view of second embodiment of the invention measuring reference signals in Physical Resource Block.At Cyclic Prefix is under the situation of regular circulation prefix, and measuring reference signals shown in Fig. 3 a, is the situation of extended cyclic prefix under at Cyclic Prefix in the position in the Physical Resource Block, measuring reference signals in the position in the Physical Resource Block shown in Fig. 3 b.
In the present embodiment, suppose that the number of newly-increased measuring reference signals is 8, measuring reference signals is divided into K=4 reference signal group, comprise the measuring reference signals of two antenna logic ports in each reference signal group; 4 reference signal groups are designated as respectively: { #0, #1}, { #2, #3}, { #4, #5}, { #6, #7}.
In addition, in the present embodiment, P 1=P 2=...=P K=P=P Max
All available resource block are divided into a plurality of Resource Block groups in regular turn, comprise P=4 Resource Block, the h in each Resource Block group in each Resource Block group iThe measuring reference signals of=1 corresponding reference signal group of Resource Block;
Resource Block index in the Resource Block group is corresponding with the reference signal group index: P the Resource Block of (i+f) mod in the Resource Block group carries i the measuring reference signals in the reference signal group; F=0 wherein.
In a Resource Block, the RE number that reference signal group takies is q=4;
In a Resource Block, the RE number g=2 that measuring reference signals takies, the frequency domain interval between RE is 6;
The measuring reference signals of each antenna logic port is carried on last 1 OFDM symbol of subframe or the measuring reference signals of first antenna logic port in the reference signal group is carried on the 4th OFDM symbol of inverse of subframe, and the measuring reference signals of second antenna logic port is carried on last 1 OFDM symbol of subframe;
First measuring reference signals in each reference signal group in corresponding Resource Block subcarrier A and subcarrier A+6 on send, second measuring reference signals in corresponding Resource Block subcarrier A+3 and subcarrier (A+9) mod 12 on send, wherein, A=0,1,2,3,4,5.
The 3rd embodiment
Fig. 4 is the position view of third embodiment of the invention measuring reference signals in Physical Resource Block.At Cyclic Prefix is under the situation of regular circulation prefix, and measuring reference signals shown in Fig. 4 a, is the situation of extended cyclic prefix under at Cyclic Prefix in the position in the Physical Resource Block, measuring reference signals in the position in the Physical Resource Block shown in Fig. 4 b.
In the present embodiment, suppose that the number of newly-increased measuring reference signals is 8, measuring reference signals is divided into K=4 reference signal group, comprise the measuring reference signals of two antenna logic ports in each reference signal group; 4 reference signal groups are designated as respectively: { #0, #1}, { #2, #3}, { #4, #5}, { #6, #7}.
In addition, in the present embodiment, P 1=P 2=...=P K=P=P Max
All available resource block are divided into a plurality of Resource Block groups in regular turn, comprise P=8 Resource Block, the h in each Resource Block group in each Resource Block group iTwo measuring reference signals of a reference signal group of=1 Resource Block carrying;
Resource Block index in the Resource Block group is corresponding with the reference signal group index:
P Resource Block of (i+f) mod in the Resource Block group carry i reference signal group or
P Resource Block of (2i-1+f) mod in the Resource Block group carry i reference signal group or
P Resource Block of (2i+f) mod in the Resource Block group carries i reference signal group;
In a Resource Block, the RE number that reference signal group takies is q=4;
In a Resource Block, the RE number g=2 that measuring reference signals takies, the frequency domain interval between RE is 6;
The measuring reference signals of each antenna logic port be carried on last 1 OFDM symbol of subframe or reference signal group in the measuring reference signals of first antenna logic port be carried on the 4th OFDM symbol of inverse of subframe, the measuring reference signals of second antenna logic port is carried on last 1 OFDM symbol of subframe;
First measuring reference signals in each reference signal group in corresponding Resource Block subcarrier A and subcarrier A+6 on send, second measuring reference signals in corresponding Resource Block subcarrier A+3 and subcarrier (A+9) mod 12 on send, wherein, A=0,1,2,3,4,5.
The 4th embodiment
Fig. 5 is the position view of fourth embodiment of the invention measuring reference signals in Physical Resource Block.
At Cyclic Prefix is under the situation of regular circulation prefix, and measuring reference signals shown in Fig. 5 a, is the situation of extended cyclic prefix under at Cyclic Prefix in the position in the Physical Resource Block, measuring reference signals in the position in the Physical Resource Block shown in Fig. 5 b.
In the present embodiment, suppose that the number of newly-increased measuring reference signals is 8, measuring reference signals is divided into K=2 reference signal group, comprise the measuring reference signals of 4 antenna logic ports in each reference signal group; 2 reference signal groups are designated as respectively: { #0, #1, #2, #3}, { #4, #5, #6, #7}; Or
The number of supposing newly-increased measuring reference signals is 4, and measuring reference signals is divided into K=2 reference signal group, comprises the measuring reference signals of 2 antenna logic ports in each reference signal group; 2 reference signal groups are designated as respectively: { #0, #1}, { #2, #3}.
In addition, in the present embodiment, P 1=P 2=...=P K=P=P Max
All available resource block are divided into a plurality of Resource Block groups in regular turn, comprise P=12 Resource Block, the h in each Resource Block group in each Resource Block group iThe measuring reference signals of=6 corresponding reference signal groups of Resource Block;
Resource Block index in the Resource Block group is corresponding with the reference signal group index:
In the Resource Block group the (j+6 * (i-1)+f) mod P Resource Block carries i reference signal group, j=1 ..., 6.
For example, when f=0, use corresponding the 1st the reference signal group of preceding 6 Resource Block, corresponding the 2nd the reference signal group of back 6 Resource Block;
In a Resource Block, the RE number that reference signal group takies is q=4;
In a Resource Block, the RE number g=4 that measuring reference signals takies, the frequency domain interval between RE is 3;
The measuring reference signals of each antenna logic port is carried on last 1 OFDM symbol of subframe or the measuring reference signals of each antenna logic port is carried on last 1 OFDM symbol of first time slot in the subframe;
Send on subcarrier A, subcarrier A+3, subcarrier A+6 and the subcarrier A+9 of measuring reference signals in each reference signal group in corresponding Resource Block, wherein, A=0,1,2;
The 1st measuring reference signals in each reference signal group, the 2nd measuring reference signals, the 3rd measuring reference signals and the 4th measuring reference signals send on the identical running time-frequency resource in Resource Block, adopt the mode of code division multiplexing multiplexing.
The 5th embodiment
Fig. 6 is the position view of fifth embodiment of the invention measuring reference signals in Physical Resource Block.At Cyclic Prefix is under the situation of regular circulation prefix, and measuring reference signals shown in Fig. 6 a, is the situation of extended cyclic prefix under at Cyclic Prefix in the position in the Physical Resource Block, measuring reference signals in the position in the Physical Resource Block shown in Fig. 6 b.
In the present embodiment, suppose that the number of newly-increased measuring reference signals is 8, measuring reference signals is divided into K=2 reference signal group, comprise the measuring reference signals of 4 antenna logic ports in each reference signal group; 2 reference signal groups are designated as respectively: { #0, #1, #2, #3}, { #4, #5, #6, #7}; Or
The number of supposing newly-increased measuring reference signals is 4, and measuring reference signals is divided into K=2 reference signal group, comprises the measuring reference signals of 2 antenna logic ports in each reference signal group; 2 reference signal groups are designated as respectively: { #0, #1}, { #2, #3}.
In addition, in the present embodiment, P 1=P 2=...=P K=P=P Max
All available resource block are divided into a plurality of Resource Block groups in regular turn, comprise P=8 Resource Block, the h in each Resource Block group in each Resource Block group iThe measuring reference signals of=4 corresponding reference signal groups of Resource Block;
Resource Block index in the Resource Block group is corresponding with the reference signal group index:
In the Resource Block group the (j+4 * (i-1)+f) mod P Resource Block carries i reference signal group, j=1 ..., 4.
Preceding 4 Resource Block carrying reference signal group { #0, #1, #2, #3}, back 4 Resource Block corresponding the 2nd reference signal group { #4, #5, #6, #7}};
In a Resource Block, the RE number that reference signal group takies is q=6;
In a Resource Block, the RE number g=6 that measuring reference signals takies, the frequency domain interval between RE is 2;
The measuring reference signals of each antenna logic port is carried on last OFDM symbol of subframe or the measuring reference signals of each antenna logic port is carried on last OFDM symbol of first time slot in the subframe;
Send on subcarrier A, subcarrier A+2, subcarrier A+4, subcarrier A+6, subcarrier A+8 and the subcarrier A+10 of measuring reference signals in each reference signal group in corresponding Resource Block, wherein, A=0,1;
The 1st measuring reference signals in each reference signal group, the 2nd measuring reference signals, the 3rd measuring reference signals and the 4th measuring reference signals send on the identical running time-frequency resource in Resource Block, adopt the mode of code division multiplexing multiplexing.

Claims (13)

1, a kind of transmission of measuring reference signals and using method is characterized in that,
Measuring reference signals in the same reference sets of signals is carried in the identical Resource Block sends, the measuring reference signals in the different reference signal groups is carried on respectively in the different Resource Block sends;
Wherein, comprise N in i reference signal group iThe individual measuring reference signals that is used for the channel condition information measurement; Comprise different measuring reference signals in each reference signal group;
N i〉=1, i=1 ..., K, K are positive integer.
2, the method for claim 1 is characterized in that,
The measuring reference signals that comprises same number in each reference signal group.
3, the method for claim 1 is characterized in that,
All available resource block are divided into the Resource Block group in regular turn, and described Resource Block group is made up of P continuous Resource Block, comprises different Resource Block in the different Resource Block groups;
Use the h in the described Resource Block group iIndividual Resource Block carries i the measuring reference signals in the reference signal group;
Wherein, 1≤h i≤ P, P 〉=K.
4, method as claimed in claim 3 is characterized in that,
I reference signal group is carried on the (j+ (i-1) * h in the described Resource Block group i+ f) send in mod P Resource Block;
Wherein, j=1 ..., h i, described f is fixing constant, or f by: cell identifier and/or subframe index and/or component carrier frequency index are determined.
5, method as claimed in claim 3 is characterized in that,
h i＝1，P＝2×K；
I reference signal group is carried in P Resource Block of (i+f) mod in the described Resource Block group and sends; Or
I reference signal group is carried in P Resource Block of (2i-1+f) mod in the described Resource Block group and sends; Or
I reference signal group is carried in P Resource Block of (2i+f) mod in the described Resource Block group and sends;
Wherein, described f is fixing constant, or f by: cell identifier CellId and/or subframe index SubFramIndex and/or component carrier frequency index CCIndex determine.
6, as claim 4 or 5 described methods, it is characterized in that,
F=CellId or f=SubFramIndex or f=CCIndex or f=CCIndex+SubFramIndex+CellId or f=CCIndex+SubFramIndex or f=CCIndex+CellId or f=SubFramIndex+CellId or f=0.
7, as the described method of arbitrary claim in the claim 1 to 6, it is characterized in that,
Each measuring reference signals is carried on: on last 1 orthogonal frequency division multiplex OFDM symbol of subframe or be carried on the 4th OFDM symbol of inverse of subframe or be carried on the 6th the OFDM symbol of first time slot of subframe or be carried on last 1 OFDM symbol of first time slot of subframe; Or be carried on the 3rd OFDM symbol of inverse of subframe.
8, as the described method of arbitrary claim in the claim 1 to 6, it is characterized in that,
Measuring reference signals is carried on following any two different OFDM symbols: the 6th OFDM symbol of first time slot of subframe, last 1 OFDM symbol of first time slot of subframe, last 1 the OFDM symbol of subframe, subframe the 4th OFDM symbol reciprocal; Or
Measuring reference signals is carried on following any two different OFDM symbols: the 3rd symbol of inverse of the 1st OFDM symbol of second time slot of subframe, the 2nd OFDM symbol of second time slot of subframe, each time slot.
9, as the described method of arbitrary claim in the claim 1 to 6, it is characterized in that,
Measuring reference signals takies g Resource Unit in the Resource Block of its transmission of carrying, wherein, and 1≤g≤12;
When g＞1, the frequency domain interval of measuring reference signals in the Resource Block of its transmission of carrying is
10, method as claimed in claim 9 is characterized in that,
In reference signal group i, comprise N iDuring individual measuring reference signals, the frequency domain interval in the Resource Block that carrying reference signal group i sends between the different measuring reference signal is
Figure A2009101355870004C1
N i＞1.
11, as the described method of claim 1 to 6, it is characterized in that,
Different measuring reference signal in the same reference signal group sends on identical time-frequency position, adopts sign indicating number branch mode multiplexing.
12, the method for claim 1 is characterized in that,
Use described measuring reference signals and publicly-owned measuring reference signals that m antenna logic port carried out the channel status measurement or use described measuring reference signals that m antenna logic port carried out the channel status measurement;
Wherein, m=1 or 2 or 4 or 6 or 8.
13, the method for claim 1 is characterized in that,
The antenna logic port that each measuring reference signals is corresponding different; The order of each measuring reference signals according to the antenna logical port number is divided in described K the reference signal group.
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