CN101541085B - Sending and using method of measure-reference signals - Google Patents

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, particularly relate to a kind of transmission and using method of measuring reference signals.

Background technology

OFDM (Orthogonal Frequency Division Multiplexing, be called for short OFDM) technological essence is a kind of multi-carrier modulation communication technology, this technology is one of core technology in forth generation (4G) mobile communication system.On frequency domain, the multipath channel of OFDM presents frequency selective fading characteristic, in order to overcome this decline, channel is divided into multiple subchannel on frequency domain, spectral characteristic all near flat of every sub-channels, and each sub-channels of OFDM is mutually orthogonal, therefore allow the frequency spectrum of subchannel overlapped, thus very can utilize frequency spectrum resource to limits.

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 the key technology of B3G (Beyond 3rd Generation, beyond 3G) and 4G mobile communication system is become.But when channel relevancy is strong, the diversity gain brought by multipath channel and spatial multiplexing gain reduce greatly, cause declining to a great extent of mimo system performance.Propose a kind of new MIMO method for precoding in recent years, the method is a kind of MIMO multiplex mode efficiently, and mimo channel is changed into multiple independently pseudo channel by its precoding processing by sending and receiving end.Because effectively eliminate the impact of channel relevancy, so precoding technique ensure that mimo system stability under circumstances.

Long Term Evolution (Long Term Evolution is called for short LTE) system is the essential planning of third generation partnership (3GPP).When system adopts conventional cyclic prefix, a time slot comprises 7 uplink/downlink symbols, and when system adopts extended cyclic prefix, a time slot comprises 6 uplink/downlink symbols.A Resource Unit (Resource Element, be called for short RE) be a subcarrier in an OFDM symbol, and a downlink resource block (Resource Block, be called for short RB) be made up of continuous 12 subcarriers and continuous 7 (being 6 when adopting extended cyclic prefix) OFDM symbol, frequency domain is 180kHz, time domain is the time span of a general time slot.When Resourse Distribute, be that base unit distributes with Resource Block.

LTE system supports that the MIM0 of 4 antennas applies, corresponding antenna port #0, antenna port #1, antenna port #2, antenna port #3 adopt community publicly-owned measuring reference signals (the Cell-specificreference signals of full bandwidth, be called for short CRS) mode, when Cyclic Prefix is conventional cyclic prefix, these publicly-owned measuring reference signals positions in Physical Resource Block as shown in Figure 1a, when Cyclic Prefix is extended cyclic prefix, these publicly-owned measuring reference signals positions in Physical Resource Block as shown in Figure 1 b.In addition, also has the measuring reference signals (UE-specific referencesignals) that a kind of user is proprietary, 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 community 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 meet or more than 3GPP TR 25.913: except 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, IMT-Advanced) that ITU-R (Union of International Telecommunication is wireless department) proposes.Wherein, refer to the demand of LTE Release-8 backward compatibility: the terminal of LTE Release-8 can work in the network of LTE-Advanced; The terminal of LTE-Advanced can work in the network of LTE Release-8.

In addition, LTE-Advanced at the spectrum disposition of different size, should be able to work, to reach higher performance and Target peak rate under comprising the spectrum disposition (the continuous print frequency spectrum resource as 100MHz) wider than LTE Release-8.Because LTE-Advanced network needs to access LTE user, so its operational frequency bands needs to cover current LTE frequency band, this frequency range does not exist the spectral bandwidth of assignable continuous 100MHz.So LTE-Advanced needs the technical problem solved to be several distribution continuous component carrier frequency (frequency spectrum) (Component carrier) be on different frequency bands aggregating to form the operable 100MHz bandwidth of LTE-Advanced.Namely the frequency spectrum after assembling is divided into n component carrier frequency (frequency spectrum), and the frequency spectrum in each component carrier frequency (frequency spectrum) is continuous print.

The descending application can supporting at most 8 antennas of LTE-Advanced has been specify that in demand behaviors report TR 36.814 V0.1.1 of the LTE-Advanced of in September, 2008 proposition; 3GPP the 56th meeting in February, 2009 specify that the design basic framework (Way forward) of the application of support 8 antenna and the LTE-Advanced downstream measurement reference signal of the technology such as CoMP (coordinated multipoint transmission), double-current Beamforming (Wave beam forming), the downstream measurement reference signal of LTE-Advanced is defined as the measuring reference signals of two types: for the measuring reference signals of carrying out PDSCH demodulation and the measuring reference signals measured for channel condition information (Channel Status Information, CSI).

At present, the sending method of the measuring reference signals for channel condition information measurement of LTE-Advanced is not also had.

Summary of the invention

Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provides a kind of sending method of the measuring reference signals for channel condition information measurement.

In order to solve the problem, the invention provides a kind of transmission and using method of measuring reference signals, the method comprises:

Measuring reference signals in same reference signal group is carried in identical Resource Block and sends, the measuring reference signals in different reference signal group is carried in different Resource Block respectively and sends;

Wherein, N is comprised in i-th reference signal group_ithe individual measuring reference signals measured for channel condition information; Different measuring reference signals is comprised in each reference signal group;

N_i>=1, i=1 ..., K, K are positive integer.

In addition, the measuring reference signals of same number is comprised in each reference signal group.

In addition, all available resource block are sequentially divided into Resource Block group, described Resource Block group is made up of P continuous print Resource Block, comprises different Resource Block in different Resource Block groups;

Use the h in described Resource Block group_iindividual Resource Block carries the measuring reference signals in i-th reference signal group;

Wherein, 1≤h_i≤ P, P>=K.

In addition, i-th reference signal group is carried on (j+ (the i-1) × h in described Resource Block group_i+ f) send in a mod P Resource Block;

Wherein, j=1 ..., h_i, described f is fixing constant, or f is determined by: cell identifier and/or subframe index and/or component carrier frequency index.

In addition, h_i=1, P=2 × K;

I-th reference signal group is carried in (i+f) mod P the Resource Block in described Resource Block group and sends; Or

I-th reference signal group is carried in (2i-1+f) mod P the Resource Block in described Resource Block group and sends; Or

I-th reference signal group is carried in (2i+f) mod P the Resource Block in 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 determines.

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 in inverse the 4th OFDM symbol being carried on subframe or in the 6th OFDM symbol being carried on subframe first time slot or be carried in last 1 OFDM symbol of subframe first time slot; Or be carried in inverse the 3rd OFDM symbol of subframe.

In addition, measuring reference signals is carried in following any two different OFDM symbol: the 6th OFDM symbol of subframe first time slot, last 1 OFDM symbol of subframe first time slot, last 1 OFDM symbol of subframe, subframe the 4th OFDM symbol reciprocal; Or

Measuring reference signals is carried in following any two different OFDM symbol: inverse the 3rd symbol of the 1st OFDM symbol of subframe second time slot, the 2nd OFDM symbol of subframe second time slot, each time slot.

In addition, measuring reference signals takies g Resource Unit in its Resource Block sent of carrying, wherein, and 1≤g≤12;

As g > 1, the frequency domain interval of measuring reference signals in its Resource Block sent of carrying is

In addition, when comprising N in reference signal group i_iduring individual measuring reference signals, the frequency domain interval in the Resource Block that carrying reference signal group i sends between different measuring reference signal isn_i> 1.

In addition, the different measuring reference signal in same reference signal group sends on identical time-frequency location, adopts code to divide mode multiplexing.

In addition, described measuring reference signals and publicly-owned measuring reference signals is used to carry out channel status measurement to m antenna logic port or use described measuring reference signals to carry out channel status measurement to m antenna logic port;

Wherein, m=1 or 2 or 4 or 6 or 8.

In addition, the antenna logic port that each measuring reference signals is corresponding different; Each measuring reference signals is divided in described K reference signal group according to the order of antenna logic port numbers.

In sum, adopt method of the present invention, while ensureing as far as possible few reference signal expense, ensure that the performance of transmission, and can well compatible existing LTE system, thus realize the MIMO transmission of high-order, improve the overall performance of system.

Accompanying drawing explanation

Fig. 1 a and Fig. 1 b is the schematic diagram of publicly-owned reference signal position in Physical Resource Block, LTE system community;

Fig. 2 a and Fig. 2 b is the position view of first embodiment of the invention measuring reference signals in Physical Resource Block;

Fig. 3 a and Fig. 3 b is the position view of second embodiment of the invention measuring reference signals in Physical Resource Block;

Fig. 4 a and Fig. 4 b is the position view of third embodiment of the invention measuring reference signals in Physical Resource Block;

Fig. 5 a and Fig. 5 b is the position view of fourth embodiment of the invention measuring reference signals in Physical Resource Block;

Fig. 6 a and Fig. 6 b is the position view of fifth embodiment of the invention measuring reference signals in Physical Resource Block.

Embodiment

Core concept of the present invention is, increases the measuring reference signals measured for channel condition information newly, all measuring reference signals is divided into K group (being called reference signal group), comprises N in i-th reference signal group_iindividual measuring reference signals, the measuring reference signals in same reference signal group sends in identical Resource Block (RB), and the measuring reference signals in different reference signal group 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 comprised in each reference signal group is identical, i.e. N₁=N₂...=N_k.

Be briefly described to the transmission of measuring reference signals of the present invention and using method below.

the frequency domain mapping relations of reference signal group

Available resource block all on frequency domain can be divided into M according to the size order of Resource Block index_iindividual Resource Block group for carrying the measuring reference signals of i-th reference signal group, front M_irespectively P is comprised in-1 Resource Block group_iindividual Resource Block, M_ithe number of the Resource Block comprised in individual Resource Block group is less than or equals P_i; The Resource Block index comprised in each Resource Block group is different;

Wherein, i is the sequence number of reference signal group, i=1 ..., K, M_iand P_ifor positive integer.

Preferably, P₁=P₂=...=P_k, the measuring reference signals in K reference signal group sends in a Resource Block group.Hereinafter, P is worked as₁=P₂=...=P_ktime, by P_ibe designated as P.

Use the h in each Resource Block group_iindividual Resource Block carries the measuring reference signals in i-th reference signal group; Wherein, 1≤h_i≤ P_i.

The P that can comprise from each Resource Block group_ifixedly h is chosen in individual Resource Block_iindividual Resource Block; Or according to the information such as number of times, radio frame number sent from P_ichoice of dynamical h in individual Resource Block_iindividual continuous print Resource Block.Described choice of dynamical can be with h_iindividual Resource Block is that unit circulation is chosen.

The mapping relations of reference signal group and Resource Block can be, i-th reference signal group is mapped on X Resource Block, wherein:

X=(j+t (i)+f) mod P_max,or, t (i)=i-1, or,

Wherein, j=1 ..., h_i; K is the number of reference signal group; P_max=max{P_i, i=1 ..., K}.

F is fixing constant (such as, 0), or f is determined by cell identifier (CellId) and/or subframe index (SubFramIndex) and/or component carrier frequency index (CCIndex).

Such as, 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, whole measuring reference signals is carried in 1 or 2 OFDM symbol, and the measuring reference signals of each antenna logic port carries in an OFDM symbol.

When using 1 OFDM symbol to carry whole measuring reference signals: in last 1 OFDM symbol that measuring reference signals is carried on subframe or in inverse the 4th OFDM symbol being carried on a subframe or in the 6th OFDM symbol being carried on first time slot in a subframe or be carried in last 1 OFDM symbol of first time slot in a subframe; Or be carried in inverse the 3rd OFDM symbol of a subframe.

When using 2 OFDM symbol to carry whole measuring reference signals: measuring reference signals is carried in the 6th OFDM symbol of subframe first time slot, in any two different OFDM symbol in last 1 OFDM symbol of last 1 OFDM symbol of subframe first time slot, subframe and subframe the 4th OFDM symbol reciprocal; Or in the unappropriated situation of publicly-owned measuring reference signals, measuring reference signals can be carried on the 1st, the 2nd OFDM symbol of subframe second time slot, and in the inverse of each time slot the 3rd symbol in any two different OFDM symbol.

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 its Resource Block sent of carrying is m, and suppose in a Resource Block, the RE number that each measuring reference signals takies is g, then in this Resource Block, the frequency domain interval of the measuring reference signals of same antenna logic port ispreferably, g=2; The time-frequency location of each measuring reference signals in its each Resource Block sent of carrying is identical.

When different measuring reference signals sends on identical time-frequency location, code is adopted to divide mode multiplexing.

The measuring reference signals of each antenna logic port can be determined by one or more in cell identifier, component carrier frequency index, subframe index at the initial position of frequency domain, or is configured by high-level signaling.

The initial sub-carrier positions A of measuring reference signals in Resource Block is:

Wherein, f is fixing constant (such as, 0), or f is determined by cell identifier (CellId) and/or subframe index (SubFramIndex) and/or component carrier frequency index (CCIndex).

Such as, 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 multiple measuring reference signals in reference signal group i, the frequency domain interval between the identical measuring reference signals in this reference signal group isfrequency domain interval between different measuring reference signal iswherein N_ifor the measuring reference signals number comprised in reference signal group i.

the occupation mode of measuring reference signals

Existing publicly-owned measuring reference signals can be used to carry out channel status measurement, or use existing publicly-owned measuring reference signals and newly-increased proprietary measuring reference signals to carry out channel status measurement, or only use newly-increased proprietary measuring reference signals to carry out channel status measurement; Specifically can in the following way:

Mode 0: when antenna logic port number is less than 4, uses 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; Or 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 is 6, newly-increased 2 measuring reference signals, use 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; Or 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 is 8, newly-increased 4 measuring reference signals, use 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; Or 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 (T₁), reference signal #1 (T₂), reference signal #2 (T₃), reference signal #3 (T₄), reference signal #4 (T₅), reference signal #5 (T₆), reference signal #6 (T₇), reference signal #7 (T₈).

first embodiment

Fig. 2 is the position view of first embodiment of the invention measuring reference signals in Physical Resource Block.When Cyclic Prefix is conventional cyclic prefix, as shown in Figure 2 a, when Cyclic Prefix is extended cyclic prefix, the position of measuring reference signals in Physical Resource Block as shown in Figure 2 b in the position of measuring reference signals in Physical Resource Block.

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, in each reference signal group, comprises the measuring reference signals of an antenna logic port.8 reference signal groups are designated as respectively: { #0}, { #1}, { #2}, { #3}, { #4}, { #5}, { #6}, { #7}.

In addition, in the present embodiment, P₁=P₂=...=P_k=P=P_max.

All available resource block are sequentially divided into multiple Resource Block group, in each Resource Block group, comprise P=8 Resource Block, the h in each Resource Block group_i=1 Resource Block carries the measuring reference signals of a reference signal group;

Resource Block index in Resource Block group is corresponding with reference signal group index: (i+f) mod P the Resource Block in Resource Block group carries the measuring reference signals in i-th reference signal group; Wherein f=0.

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 a measuring reference signals takies, the frequency domain interval between RE is 6;

The measuring reference signals of each antenna logic port is carried in last OFDM symbol of subframe;

The subcarrier A of measuring reference signals in each reference signal group in corresponding Resource Block and subcarrier A+6 sends, 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.When Cyclic Prefix is conventional cyclic prefix, as shown in Figure 3 a, when Cyclic Prefix is extended cyclic prefix, the position of measuring reference signals in Physical Resource Block as shown in Figure 3 b in the position of measuring reference signals in Physical Resource Block.

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, in each reference signal group, comprises the measuring reference signals of two antenna logic ports; 4 reference signal groups are designated as respectively: { #0, #1}, { #2, #3}, { #4, #5}, { #6, #7}.

In addition, in the present embodiment, P₁=P₂=...=P_k=P=P_max.

All available resource block are sequentially divided into multiple Resource Block group, in each Resource Block group, comprise P=4 Resource Block, the h in each Resource Block group_ithe measuring reference signals of=1 corresponding reference signal group of Resource Block;

Resource Block index in Resource Block group is corresponding with reference signal group index: (i+f) mod P the Resource Block in Resource Block group carries the measuring reference signals in i-th reference signal group; Wherein f=0.

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 a measuring reference signals takies, the frequency domain interval between RE is 6;

The measuring reference signals of first antenna logic port in last 1 OFDM symbol that the measuring reference signals of each antenna logic port is carried on subframe or in reference signal group is carried in inverse the 4th OFDM symbol of subframe, and the measuring reference signals of second antenna logic port is carried in last 1 OFDM symbol of subframe;

The subcarrier A of first measuring reference signals in each reference signal group in corresponding Resource Block and subcarrier A+6 sends, subcarrier A+3 in corresponding Resource Block of second measuring reference signals and subcarrier (A+9) mod 12 sends, wherein, A=0,1,2,3,4,5.

3rd embodiment

Fig. 4 is the position view of third embodiment of the invention measuring reference signals in Physical Resource Block.When Cyclic Prefix is conventional cyclic prefix, as shown in fig. 4 a, when Cyclic Prefix is extended cyclic prefix, the position of measuring reference signals in Physical Resource Block as shown in Figure 4 b in the position of measuring reference signals in Physical Resource Block.

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, in each reference signal group, comprises the measuring reference signals of two antenna logic ports; 4 reference signal groups are designated as respectively: { #0, #1}, { #2, #3}, { #4, #5}, { #6, #7}.

In addition, in the present embodiment, P₁=P₂=...=P_k=P=P_max.

All available resource block are sequentially divided into multiple Resource Block group, in each Resource Block group, comprise P=8 Resource Block, the h in each Resource Block group_i=1 Resource Block carries two measuring reference signals of a reference signal group;

Resource Block index in Resource Block group is corresponding with reference signal group index:

(i+f) mod P Resource Block in Resource Block group carry i-th reference signal group or

(2i-1+f) mod P Resource Block in Resource Block group carry i-th reference signal group or

(2i+f) mod P Resource Block in Resource Block group carries i-th 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 a measuring reference signals takies, the frequency domain interval between RE is 6;

The measuring reference signals of first antenna logic port in last 1 OFDM symbol that the measuring reference signals of each antenna logic port is carried on subframe or in a reference signal group is carried in inverse the 4th OFDM symbol of subframe, and the measuring reference signals of second antenna logic port is carried in last 1 OFDM symbol of subframe;

The subcarrier A of first measuring reference signals in each reference signal group in corresponding Resource Block and subcarrier A+6 sends, subcarrier A+3 in corresponding Resource Block of second measuring reference signals and subcarrier (A+9) mod 12 sends, wherein, A=0,1,2,3,4,5.

4th embodiment

Fig. 5 is the position view of fourth embodiment of the invention measuring reference signals in Physical Resource Block.

When Cyclic Prefix is conventional cyclic prefix, as shown in Figure 5 a, when Cyclic Prefix is extended cyclic prefix, the position of measuring reference signals in Physical Resource Block as shown in Figure 5 b in the position of measuring reference signals in Physical Resource Block.

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, in each reference signal group, comprises the measuring reference signals of 4 antenna logic ports; 2 reference signal groups are designated as respectively: { #0, #1, #2, #3}, { #4, #5, #6, #7}; Or

Suppose that the number increasing measuring reference signals newly is 4, measuring reference signals is divided into K=2 reference signal group, in each reference signal group, comprises the measuring reference signals of 2 antenna logic ports; 2 reference signal groups are designated as respectively: { #0, #1}, { #2, #3}.

In addition, in the present embodiment, P₁=P₂=...=P_k=P=P_max.

All available resource block are sequentially divided into multiple Resource Block group, in each Resource Block group, comprise P=12 Resource Block, the h in each Resource Block group_ithe measuring reference signals of=6 corresponding reference signal groups of Resource Block;

Resource Block index in Resource Block group is corresponding with reference signal group index:

(j+6 × (i-1)+f) mod P Resource Block in Resource Block group carries i-th reference signal group, j=1 ..., 6.

Such as, as f=0, use corresponding 1st the reference signal group of front 6 Resource Block, corresponding 2nd the reference signal group of rear 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 a measuring reference signals takies, the frequency domain interval between RE is 3;

In last 1 OFDM symbol that the measuring reference signals of each antenna logic port is carried on subframe or the measuring reference signals of each antenna logic port be carried in last 1 OFDM symbol of first time slot in subframe;

The subcarrier A of measuring reference signals in each reference signal group in corresponding Resource Block, subcarrier A+3, subcarrier A+6 and subcarrier A+9 send, 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 send with on the 4th running time-frequency resource that measuring reference signals is identical in Resource Block, adopt the mode of code division multiplexing multiplexing.

5th embodiment

Fig. 6 is the position view of fifth embodiment of the invention measuring reference signals in Physical Resource Block.When Cyclic Prefix is conventional cyclic prefix, as shown in Figure 6 a, when Cyclic Prefix is extended cyclic prefix, the position of measuring reference signals in Physical Resource Block as shown in Figure 6 b in the position of measuring reference signals in Physical Resource Block.

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, in each reference signal group, comprises the measuring reference signals of 4 antenna logic ports; 2 reference signal groups are designated as respectively: { #0, #1, #2, #3}, { #4, #5, #6, #7}; Or

Suppose that the number increasing measuring reference signals newly is 4, measuring reference signals is divided into K=2 reference signal group, in each reference signal group, comprises the measuring reference signals of 2 antenna logic ports; 2 reference signal groups are designated as respectively: { #0, #1}, { #2, #3}.

In addition, in the present embodiment, P₁=P₂=...=P_k=P=P_max.

All available resource block are sequentially divided into multiple Resource Block group, in each Resource Block group, comprise P=8 Resource Block, the h in each Resource Block group_ithe measuring reference signals of=4 corresponding reference signal groups of Resource Block;

Resource Block index in Resource Block group is corresponding with reference signal group index:

(j+4 × (i-1)+f) mod P Resource Block in Resource Block group carries i-th reference signal group, j=1 ..., 4.

Front 4 Resource Block carrying reference signal group { #0, #1, #2, #3}, rear 4 Resource Block corresponding 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 a measuring reference signals takies, the frequency domain interval between RE is 2;

In last OFDM symbol that the measuring reference signals of each antenna logic port is carried on subframe or the measuring reference signals of each antenna logic port be carried in last OFDM symbol of first time slot in subframe;

The subcarrier A of measuring reference signals in each reference signal group in corresponding Resource Block, subcarrier A+2, subcarrier A+4, subcarrier A+6, subcarrier A+8 and subcarrier A+10 send, wherein, A=0,1;

The 1st measuring reference signals in each reference signal group, the 2nd measuring reference signals, the 3rd measuring reference signals send with on the 4th running time-frequency resource that measuring reference signals is identical in Resource Block, adopt the mode of code division multiplexing multiplexing.

Claims (11)

1. the transmission of measuring reference signals and a using method, is characterized in that,

Measuring reference signals in same reference signal group is carried in identical Resource Block and sends, the measuring reference signals in different reference signal group is carried in different Resource Block respectively and sends;

Wherein, N is comprised in i-th reference signal group_ithe individual measuring reference signals measured for channel condition information; Different measuring reference signals is comprised in each reference signal group;

N_i>=1, i=1 ..., K, K are positive integer;

Wherein, each measuring reference signals is carried on: on last 1 orthogonal frequency division multiplex OFDM symbol of subframe or in inverse the 4th OFDM symbol being carried on subframe or in the 6th OFDM symbol being carried on subframe first time slot or be carried in last 1 OFDM symbol of subframe first time slot; Or be carried in inverse the 3rd OFDM symbol of subframe;

Or

Measuring reference signals is carried in following any two different OFDM symbol: the 6th OFDM symbol of subframe first time slot, last 1 OFDM symbol of subframe first time slot, last 1 OFDM symbol of subframe, subframe the 4th OFDM symbol reciprocal;

Or

Measuring reference signals is carried in following any two different OFDM symbol: inverse the 3rd symbol of the 1st OFDM symbol of subframe second time slot, the 2nd OFDM symbol of subframe second time slot, each time slot.

2. the method for claim 1, is characterized in that,

The measuring reference signals of same number is comprised in each reference signal group.

3. the method for claim 1, is characterized in that,

All available resource block are sequentially divided into Resource Block group, and described Resource Block group is made up of P continuous print Resource Block, comprises different Resource Block in different Resource Block groups;

Hi Resource Block in described Resource Block group is used to carry measuring reference signals in i-th reference signal group;

Wherein, 1≤h_i≤ P, P>=K.

4. method as claimed in claim 3, is characterized in that,

I-th reference signal group is carried on (j+ (the i-1) × h in described Resource Block group_i+ f) send in a mod P Resource Block;

Wherein, j=1 ..., h_i, described f is fixing constant, or f is determined by: cell identifier and/or subframe index and/or component carrier frequency index.

5. method as claimed in claim 3, is characterized in that,

h_i=1，P=2×K；

I-th reference signal group is carried in (i+f) mod P the Resource Block in described Resource Block group and sends; Or

I-th reference signal group is carried in (2i-1+f) mod P the Resource Block in described Resource Block group and sends; Or

I-th reference signal group is carried in (2i+f) mod P the Resource Block in 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 determines.

6. the method as described in claim 4 or 5, 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. the method as described in claim arbitrary in claim 1 to 6, is characterized in that,

Measuring reference signals takies g Resource Unit in its Resource Block sent of carrying, wherein, and 1≤g≤12;

As g>1, the frequency domain interval of measuring reference signals in its Resource Block sent of carrying is

8. method as claimed in claim 7, is characterized in that,

When comprising N in reference signal group i_iduring individual measuring reference signals, the frequency domain interval in the Resource Block that carrying reference signal group i sends between different measuring reference signal isn_i>1.

9. the method as described in claim 1 to 6, is characterized in that,

Different measuring reference signal in same reference signal group sends on identical time-frequency location, adopts code to divide mode multiplexing.

10. the method for claim 1, is characterized in that,

Described measuring reference signals and publicly-owned measuring reference signals is used to carry out channel status measurement to m antenna logic port or use described measuring reference signals to carry out channel status measurement to m antenna logic port;

Wherein, m=1 or 2 or 4 or 6 or 8.

11. the method for claim 1, is characterized in that,

The antenna logic port that each measuring reference signals is corresponding different; Each measuring reference signals is divided in described K reference signal group according to the order of antenna logic port numbers.