CN103856310A - Channel state information reference signal transmitting method and device - Google Patents

Abstract

The embodiment of the invention discloses a CSI-RS transmitting method and device, and relates to the field of wireless communication. The CSI-RS transmitting method and device are used for reducing waste of time-frequency resources. In the method and device, a network side sends CSI-RSs in REs in first X OFDM symbols in a downlink sub-frame or a downlink time slot, wherein X is a positive integer smaller than or equal to 3; a terminal receives the CSI-RSs in the REs in the first X OFDM symbols in the downlink sub-frame or the downlink time slot; thus, the scheme that the CSI-RSs are transmitted in the REs in the first X OFDM symbols in the downlink sub-frame or the downlink time slot is achieved; when the scheme is applied to a TDD guard band and a new type NCT carrier, the first X OFDM symbols of the sub-frame are fully utilized, and therefore waste of the time-frequency resources is reduced.

Description

The transmission method of channel state information reference signals and equipment

Technical field

The present invention relates to wireless communication field, relate in particular to a kind of transmission method and equipment of channel state information reference signals.

Background technology

There is different time division duplex (TDD) operator on adjacent frequency band time, if different operators configures different TDD uplink-downlink configuration on frequency band separately, may cause the intersection between up-downgoing transmission to disturb, as shown in Figure 1.Between up-downgoing, interference can have a strong impact on proper communication, for avoiding this to disturb, need between two working bands, reserve guard band.In guard band, do not carry out at present any transfer of data.

In Long Term Evolution (Long Term Evolution, LTE) system, the length of a radio frames is 10ms, and the length of a subframe is 1ms, in a radio frames, comprises 10 subframes.For time-division (TD) system, at present take a radio frames as unit definition 7 kinds of TDD uplink-downlink configuration, as shown in table 1, wherein D represents descending sub frame, U represents sub-frame of uplink, S represents the special subframe in TDD system, in special subframe, comprise descending pilot frequency time slot (Downlink Pilot Time Slot, DwPTS), protection interval (Guard Period, and uplink pilot time slot (Uplink Pilot Time Slot GP), UpPTS) three regions, wherein DwPTS is used for transmitting descending master sync signal and generic downlink business datum, GP is protection interval, general according to the switching time of downstream-to-upstream, be up to descending switching time, and the propagation delay time relevant to radius of society defines, for avoiding the overlapping interference between the uplink and downlink on same carrier wave, UpPTS is used for transmitting uplink random access signal and uplink detection signal.

Table 1

Define at present 10 kinds of special subframe configurations, for different application scenarioss, as shown in table 2, wherein T _sfor the systematic sampling time interval, based on the corresponding 30720T of 1 subframe _sdefinition.The subframe structure of different special subframe configurations is as shown in Fig. 2 a-Fig. 2 b, descending use regular circulation prefix (cyclic prefix, CP) time, in a special subframe, comprise 14 symbols, as shown in Figure 2 a, when descending sub frame uses expansion CP, in a special subframe, comprise 12 symbols, as shown in Figure 2 b.

Table 2

The channel condition information measuring reference signals (CSI-RS) of network side transmission is for the measurement of pattern 9 and 10, user terminal (User Equipment, UE) special pilot tone, the CSI pilot tone that different UEs is seen can be different, comprise pattern, cycle, original position and the power of pilot tone.Therefore, Yi Ge community possible configuration multiple CSI-RS, UE also can have multiple CSI-RS configuration on Yi Ge community.CSI-RS sends on 1,2,4 or 8 antenna port, respective antenna port p=15 respectively, and p=15,16, p=15 ..., 18, and p=15 ..., 22.In addition,, in order to reduce the interference between minizone CSI-RS and data, conventionally in the position of neighbor cell configuration CSI-RS, local area is all configured to zero energy CSI-RS.

CSI-RS sequence definition is:

$r_{{l,n}_s}\left(m\right)=\frac{1}{\sqrt{2}}(1-2\·c\left(2m\right))+j\frac{1}{\sqrt{2}}(1-2\·c(2m+1)),m=\mathrm{0,1},...,N_{\mathrm{RB}}^{\max ,\mathrm{DL}}-1;$

Wherein, n _sbe a time slot sequence number in radio frames, l is the sequence number of OFDM (Orthogonal Frequency Division Multiplexing, an OFDM) symbol in time slot.Random sequence c (i) definition in 7.2 joints of agreement 36.211.Random sequence starts to carry out initialization at each OFDM:

$c_{\mathrm{init}}=2^{10}\·(7\·(n_s+1)+l+1)\·(2\·N_{\mathrm{ID}}^{\mathrm{cell}}+1)+2\·N_{\mathrm{ID}}^{\mathrm{cell}}+N_{\mathrm{CP}};$

Wherein,

In the transmission subframe of CSI-RS, pilot frequency sequence

on being mapped in complex symbol as the pilot tone of antenna port p:

$a_{k,l}^{\left(p\right)}=w_{l^{\′\′}}\·r_{l,n_s}\left(m^{\′}\right);$

Wherein,

$w_{l^{\′\′}}=\left\{\begin{array}{cc}1& p\∈\left\{\mathrm{15,17,19,21}\right\}\\ {(-1)}^{l^{\′\′}}& p\∈\left\{\mathrm{16,18,20,22}\right\}\end{array}\right.$

l″＝0,1

$m=\mathrm{0,1},...,N_{\mathrm{RB}}^{\mathrm{DL}}-1$

Wherein (k ', l ') and n _scan obtain by form 6.10.5.2-1 and 6.10.5.2-2 in agreement 36.211, CSI-RS only conventional CP and expansion CP meet respectively above-mentioned two table conditionals descending time slot in transmit, the descending sub frame that simultaneously transmits CSI-RS need meet the form 6.10.5.3-1 in agreement 36.211.Terminal hypothesis does not send CSI-RS on the special subframe of TDD system, or at CSI-RS and synchronizing signal, Physical Broadcast Channel (Physical Broadcast Channel, PBCH) and the subframe that clashes of system information block type 1 message (SystemInformationBlockType1messages) do not send CSI-RS, or do not send CSI-RS in the subframe that has configured paging (paging) information.

The zero energy CSI-RS parameter (ZeroPowerCSI-RS) of 16 bits that configure for high level, if wherein some bit is set at 1 o'clock, 4 port CSI pilot frequency locations corresponding to UE hypothesis are zero energy, unless the CSI pilot tone of the non-zero power of these resource elements and high-level signaling configuration is overlapping.Wherein, each bit is corresponding with 4 port CSI pilot frequency configuration numberings, the lowest number of the corresponding 4 port CSI pilot frequency configuration of first left bit.

In order to reduce overhead, a kind of new carrier type of definition (New Carrier Type is discussed in LTE Rel-11, NCT), in this carrier wave, do not transmit traditional Physical Downlink Control Channel (PDCCH), can transmit the Physical Downlink Control Channel (EPDCCH) of enhancing.In this carrier wave, carry out data demodulates based on user-specific reference signal (UE-specific reference signals, URS).CRS does not transmit or every 5ms takies a subframe transmission and only transmission on port 0.

In prior art; the poor problem of frequency spectrum resource is day by day serious; but for fear of issuable interference; on reserved guard band, do not transmit at present any data; therefore in the time that the bandwidth of guard band is larger; the frequency spectrum resource waste in quite large degree can be caused, in order to alleviate the present situation of frequency spectrum resource anxiety, the utilance of frequency spectrum resource should be improved as much as possible.For seven kinds of TDD uplink-downlink configuration; always descending sub frame of subframe 0 and 5; always sub-frame of uplink of subframe 2; always special subframe of subframe 1; therefore in protection bandwidth reserved between TDD system, in the fixing subframe of above-mentioned transmission direction, can carry out equidirectional transfer of data and not affect existing transfer of data.At present in the time that the length of DwPTS is 3 OFDM symbols, can be used for transmitting PDCCH and synchronizing signal, now the PDCCH of transmission is mainly used in uplink scheduling signaling (ULDCI), is not used in Physical Downlink Shared Channel (PDSCH).If still continue to use the method in guard band; resource on guard band cannot be fully utilized so; because can only there be a sub-frame of uplink in this frequency band; in subframe 1,6, transmit without corresponding ULDCI; and subframe 1,6 also cannot pass PDSCH, the first two symbol of subframe 1 and 6 just equals all to have slatterned so.Owing to not transmitting traditional PDCCH on NCT carrier wave, in the time that special subframe is configured to configure 0,5, the DwPTS in descending sub frame 1,6, without PDCCH transmission, does not support PDSCH transmission yet, will cause the wasting of resources in addition.

Summary of the invention

The embodiment of the present invention provides a kind of transmission method and equipment of channel state information reference signals, for reducing the waste of running time-frequency resource.

A transmission method of channel state information reference signals CSI-RS, the method comprises:

Network side is determined the configuration information that transmission CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Network side sends corresponding CSI-RS according to definite configuration information to terminal.

A transmission method of channel state information reference signals CSI-RS, the method comprises:

Terminal determines that network side sends the configuration information that CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Terminal receives according to definite configuration information the CSI-RS that network side sends.

A kind of base station, this base station comprises:

Determining unit, sends for determining the configuration information that CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Transmitting element, for sending corresponding CSI-RS according to definite configuration information to terminal.

A kind of terminal, this terminal comprises:

Determining unit, for determining that network side sends the configuration information that CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Receiving element, for receiving according to definite configuration information the CSI-RS that network side sends.

In the scheme that the embodiment of the present invention provides, in RE in front X the OFDM symbol of network side in descending sub frame or descending time slot, send CSI-RS, wherein X is not more than 3 positive integer, on RE in front X the OFDM symbol of terminal in descending sub frame or descending time slot, receive CSI-RS, visible, this method has realized the scheme of front X OFDM symbol transmission CSI-RS in descending sub frame or descending time slot, in the time that this scheme is applied on TDD guard band and newtype NCT carrier wave, front X OFDM symbol of subframe can be fully used, and then reduce the waste of running time-frequency resource.

Accompanying drawing explanation

Fig. 1 is that schematic diagram is disturbed in the up-downgoing between TDD system of the prior art;

Fig. 2 a is the special subframe configuration structure schematic diagram under descending conventional CP in prior art;

Fig. 2 b is the special subframe configuration structure schematic diagram under descending expansion CP in prior art;

The method flow schematic diagram that Fig. 3 provides for the embodiment of the present invention;

The other method schematic flow sheet that Fig. 4 provides for the embodiment of the present invention;

Fig. 5 a-Fig. 5 u is the CSI-RS transmission pattern schematic diagram in the embodiment of the present invention;

Fig. 6 a-Fig. 6 u is the CSI-RS transmission pattern schematic diagram in another embodiment of the present invention;

The architecture of base station schematic diagram that Fig. 7 provides for the embodiment of the present invention;

The terminal structure schematic diagram that Fig. 8 provides for the embodiment of the present invention.

Embodiment

For a kind of transmission method that can be applicable to the CSI-RS on TDD guard band and NCT carrier wave is provided, and then the waste of minimizing running time-frequency resource, the embodiment of the present invention provides the transmission method of a kind of CSI-RS.

Referring to Fig. 3, the transmission method of the CSI-RS that the embodiment of the present invention provides for network side, comprises the following steps:

Step 30: network side is determined the configuration information that transmission CSI-RS uses; This configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; Transmission in Resource Unit (RE) in this compression CSI-RS structure in all CSI-RS front X OFDM (OFDM) symbol in descending sub frame or descending time slot, wherein X is not more than 3 positive integer;

Step 31: network side sends corresponding CSI-RS according to definite configuration information to terminal.

In above-mentioned compression CSI-RS structure, the CSI-RS resource that each CSI-RS port is corresponding is made up of Y the RE that time domain is adjacent or frequency domain is adjacent, and wherein Y is greater than 1 positive integer; And for CSI-RS resource corresponding to each CSI-RS port, this CSI-RS resource is multiplexing by the CSI-RS of Y CSI-RS port at most.

The CSI-RS configuration information that above-mentioned configuration information comprises and zero energy CSI-RS configuration information all comprise parameter l ' and mod (n _s, 2); L ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

The CSI-RS that above-mentioned configuration information comprises configures corresponding kind number and is not less than P, and P is the kind number of the CSI-RS configuration of corresponding compression CSI-RS structure; The shared bit number of zero energy CSI-RS configuration information that above-mentioned configuration information comprises is not less than K, and K is the kind number of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure; Or,

The CSI-RS that above-mentioned configuration information comprises configures corresponding kind number and is not less than M, and M is the kind number of CSI-RS configuration and the kind number sum of the CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol; The shared bit number of zero energy CSI-RS configuration information that above-mentioned configuration information comprises is not less than N, and N is the kind number of zero energy CSI-RS configuration and the kind number sum of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol.

Referring to Fig. 4, the transmission method of the CSI-RS that the embodiment of the present invention provides for end side, comprises the following steps:

Step 40: terminal determines that network side sends the configuration information that CSI-RS uses; This configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In RE in this compression CSI-RS structure in all CSI-RS front X OFDM symbol in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Step 41: terminal receives according to definite configuration information the CSI-RS that network side sends.

In above-mentioned compression CSI-RS structure, the CSI-RS resource that each CSI-RS port is corresponding is made up of Y the RE that time domain is adjacent or frequency domain is adjacent, and wherein Y is greater than 1 positive integer; And for CSI-RS resource corresponding to each CSI-RS port, this CSI-RS resource is multiplexing by the CSI-RS of Y CSI-RS port at most.

The CSI-RS configuration information that above-mentioned configuration information comprises and zero energy CSI-RS configuration information all comprise parameter l ' and mod (n _s, 2); L ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

The CSI-RS that above-mentioned configuration information comprises configures corresponding kind number and is not less than P, and P is the kind number of the CSI-RS configuration of corresponding compression CSI-RS structure; The shared bit number of zero energy CSI-RS configuration information that this configuration information comprises is not less than K, and K is the kind number of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure; Or,

The CSI-RS that above-mentioned configuration information comprises configures corresponding kind number and is not less than M, and M is the kind number of CSI-RS configuration and the kind number sum of the CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol; The shared bit number of zero energy CSI-RS configuration information that this configuration information comprises is not less than N, and N is the kind number of zero energy CSI-RS configuration and the kind number sum of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol.

Below the present invention is specifically described:

Base station side:

Step 1: network side is determined port and the subframe that transmission CSI-RS uses; Here, it is 1 o'clock at port number, send the port-for-port 15 that CSI-RS uses, it is 2 o'clock at port number, sending port-for-port 15 and port one 6 that CSI-RS uses, is 4 o'clock at port number, sends port-for-port 15, port one 6, port one 7 and port one 8 that CSI-RS uses, be 8 o'clock at port number, send port-for-port 15, port one 6, port one 7, port one 8, port one 9, port 20, port 21, port 22 that CSI-RS uses.The subframe that transmission CSI-RS uses is descending sub frame or special subframe.

Step 2: network side, for each port of determining, is determined the Resource Unit (RE) using to terminal transmission CSI-RS on this port and the CSI-RS sending on each RE, and sent corresponding CSI-RS to terminal by this port on each RE; Wherein, the RE that transmission CSI-RS uses is arranged in the first two OFDM symbol of the definite subframe of step 30.

As a kind of execution mode, in step 2, can determine the RE using to terminal transmission CSI-RS and the CSI-RS sending on this port on each RE according to following formula:

$a_{k,l}^{\left(p\right)}=w_{l^{\′\′}}\·r_{l,n_s}\left(m^{\′}\right);$

Wherein,

be on the port that is numbered p, the reference numeral subcarrier that is k and be numbered the CSI-RS sending on the RE of OFDM symbol of l; n _sfor time slot sequence number, n _svalue be 0;

for the CSI-RS sequence of LTE system protocol definition; K, l, w _l", the value of m' determines according to LTE system protocol, that is:

$w_{l^{\′\′}}=\left\{\begin{array}{cc}1& p\∈\left\{\mathrm{15,17,19,21}\right\}\\ {(-1)}^{l^{\′\′}}& p\∈\left\{\mathrm{16,18,20,22}\right\}\end{array}\right.$

l″＝0,1

$m=\mathrm{0,1},...,N_{\mathrm{RB}}^{\mathrm{DL}}-1$

The above-mentioned parameter (k', l') using while determining k, l according to LTE system protocol is as follows:

Be 1 or 2 o'clock sending the port number that uses of CSI-RS: (k', l')=(11,0), or (k', l')=(9,0), or (k', l')=(7,0), or (k', l')=(10,0), or (k', l')=(8,0), or (k', l')=(6,0), or (k', l')=(5,0), or (k', l')=(4,0), or (k', l')=(3,0), or (k', l')=(2,0), or (k', l')=(1,0), or (k', l')=(0,0); Or,

The port number using at transmission CSI-RS is 4 o'clock: (k', l')=(11,0), or (k', l')=(9,0), or (k', l')=(7,0), or (k', l')=(10,0), or (k', l')=(8,0), or (k', l')=(6,0); Or,

The port number using at transmission CSI-RS is 8 o'clock: (k', l')=(11,0), or (k', l')=(9,0), or (k', l')=(7,0).

Specifically can be referring to as following table 3:

Table 3

As another kind of execution mode, in step 2, can determine the RE using to terminal transmission CSI-RS and the CSI-RS sending on this port on each RE according to following formula:

$a_{k,l}^{\left(p\right)}=w_{l^{\′\′}}\·r_{l,n_s}\left(m^{\′}\right);$

$k=k^{\′}+12m+\left\{\begin{array}{cc}-0-l^{\′\′}& \mathrm{for\; p}\∈\left\{\mathrm{15,16,19,20}\right\}\\ -6-l^{\′\′}& \mathrm{for\; p}\∈\left\{\mathrm{17,18,21,22}\right\}\end{array}\right.$

$l=l^{\′}+\left\{\begin{array}{cc}0& p\∈\left\{\mathrm{15,16,17,18}\right\}\\ 1& p\∈\left\{\mathrm{19,20,21,22}\right\}\end{array}\right.$

$w_{l^{\′\′}}=\left\{\begin{array}{cc}1& p\∈\left\{\mathrm{15,17,19,21}\right\}\\ {(-1)}^{l^{\′\′}}& p\∈\left\{\mathrm{16,18,20,22}\right\}\end{array}\right.$

l″＝0,1

$m=\mathrm{0,1},...,N_{\mathrm{RB}}^{\mathrm{DL}}-1$

Wherein,

on the port that is numbered p, by being numbered the subcarrier of k and being numbered the CSI-RS sending on the RE that the OFDM symbol of l forms; n _sfor time slot sequence number, n _svalue be 0;

for the CSI-RS sequence of LTE system protocol definition;

for the downlink bandwidth of network equipment and terminal work at present,

for the maximum downstream bandwidth of system; The parameter (k', l') using while determining k, l meets the following conditions: k' is value in 1 to 11 odd number, and the value of l' is 0 or 1.

Concrete, be 1 or 2 o'clock sending the port number that uses of CSI-RS: (k', l')=(11, 0), or (k', l')=(9, 0), or (k', l')=(7, 0), or (k', l')=(11, 1), or (k', l')=(9, 1), or (k', l')=(7, 1), or (k', l')=(5, 0), or (k', l')=(3, 0), or (k', l')=(1, 0), or (k', l')=(5, 1), or (k', l')=(3, 1), or (k', l')=(1, 1), or,

The port number using at transmission CSI-RS is 4 o'clock: (k', l')=(11,0), or (k', l')=(9,0), or (k', l')=(7,0), or (k', l')=(11,1), or (k', l')=(9,1), or (k', l')=(7,1); Or,

The port number using at transmission CSI-RS is 8 o'clock: (k', l')=(11,0), or (k', l')=(9,0), or (k', l')=(7,0).

Shown in table 4 specific as follows:

Table 4

Preferably, network side can be that the configuration information of CSI-RS transmission is sent to terminal by the mode that defines in LTE system protocol according to prior art, and difference is only the parameter l that CSI-RS configuration information that this configuration information comprises and zero energy CSI-RS configuration information comprise ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

Preferably, at least one in the configuration information that network side can transmit following six kinds of CSI-RS by high-level signaling sends to terminal:

CSI-RS port number, to notify the number that sends the port that CSI-RS was used;

CSI-RS configuration information, the numbering of the CSI-RS being adopted to notify configuration, the value (value of (k', l')) of the parameter using when every kind of CSI-RS configuration corresponding a kind of definite k, l; The shared bit number of this CSI-RS configuration information is not less than N, N is the number of CSI-RS configuration and the number sum of the CSI-RS configuration newly increasing defining in LTE system protocol, wherein corresponding a kind of CSI-RS configuration of each bit, such as, if a certain bit is 0, represent the CSI-RS configuration that does not adopt this bit corresponding, if 1, the CSI-RS configuration that adopts this bit corresponding represented;

CSI-RS subframe configuration information, to notify the subframe that sends CSI-RS place; This CSI-RS subframe configuration information can comprise CSI-RS transmission cycle and sub-frame offset, suppose that CSI-RS transmission cycle is T, sub-frame offset is 2, and terminal can determine that second subframe in each CSI-RS transmission cycle T is the subframe that network side sends CSI-RS place;

The ratio of the performance number of every RE of the performance number of the every RE on Physical Downlink Shared Channel (PDSCH) and transmission CSI-RS, to notify the transmitted power of CSI-RS; Terminal can be determined performance number/this ratio of the every RE on performance number=PDSCH of every RE of transmission CSI-RS;

Zero energy CSI-RS configuration information, the CSI-RS configuration that does not send CSI-RS to notify is the numbering of zero energy CSI-RS configuration; The shared bit number of this zero energy CSI-RS configuration information is not less than M, M is the number of zero energy CSI-RS configuration and the number sum of the zero energy CSI-RS configuration newly increasing defining in LTE system protocol, wherein corresponding a kind of zero energy CSI-RS configuration of each bit, such as, if a certain bit is 0, the CSI-RS that this bit is corresponding is configured to non-zero power CSI-RS configuration, if 1, represent to adopt CSI-RS corresponding to this bit to be configured to zero energy CSI-RS configuration; Terminal, in the time determining that the CSI-RS adopting is configured to zero energy CSI-RS configuration, is not carried out the reception of CSI-RS;

Zero energy CSI-RS subframe configuration information, to notify the numbering of the subframe that does not send CSI-RS; Terminal does not receive CSI-RS in zero energy CSI-RS subframe.

Preferably, network side can also send to terminal by least one in following six kinds of CSI-RS transmission of configuration information by high-level signaling:

CSI-RS port number, to notify the number that sends the port that CSI-RS was used;

CSI-RS configuration information, the numbering of the CSI-RS being adopted to notify configuration, the value (value of (k', l')) of the parameter using when every kind of CSI-RS configuration corresponding a kind of definite k, l; The shared bit number of this CSI-RS configuration information is not less than P, and P is the number of the CSI-RS configuration that newly increases; Wherein corresponding a kind of CSI-RS configuration of each bit, such as, if a certain bit is 0, represent not adopt the CSI-RS that this bit is corresponding to configure, if 1, the CSI-RS configuration that adopts this bit corresponding represented;

CSI-RS subframe configuration information, to notify the subframe that sends CSI-RS place; This CSI-RS subframe configuration information can comprise CSI-RS transmission cycle and sub-frame offset, suppose that CSI-RS transmission cycle is T, sub-frame offset is 2, and terminal can determine that second subframe in each CSI-RS transmission cycle T is the subframe that network side sends CSI-RS place;

The ratio of the performance number of every RE of the performance number of the every RE on PDSCH and transmission CSI-RS, to notify the transmitted power of CSI-RS; Terminal can be determined performance number/this ratio of the every RE on performance number=PDSCH of every RE of transmission CSI-RS;

Zero energy CSI-RS configuration information, to notify the numbering of the CSI-RS configuration that does not send CSI-RS; The shared bit number of this zero energy CSI-RS configuration information is not less than K, K is the number of the zero energy CSI-RS configuration that newly increases, wherein corresponding a kind of zero energy CSI-RS configuration of each bit, such as, if a certain bit is 0, the CSI-RS that this bit is corresponding is configured to non-zero power CSI-RS configuration, if 1, represent to adopt CSI-RS corresponding to this bit to be configured to zero energy CSI-RS configuration; Terminal, in the time determining that the CSI-RS adopting is configured to zero energy CSI-RS configuration, is not carried out the reception of CSI-RS;

Zero energy CSI-RS subframe configuration information, to notify the numbering of the subframe that does not send CSI-RS; Terminal does not receive CSI-RS in zero energy CSI-RS subframe.

End side:

Step 3: terminal determines that network side sends port and subframe that CSI-RS uses;

Step 4: for each port of determining, determine that network side sends to terminal the CSI-RS sending on the RE that uses of CSI-RS and this each RE on this port, and receive the CSI-RS that network side sends by this port on each RE; Wherein, the RE that network side uses to terminal transmission CSI-RS is arranged in the first two OFDM symbol of the definite subframe of step 40.

As a kind of execution mode, in step 4, can determine that network side sends to terminal the CSI-RS sending on the RE that uses of CSI-RS and this each RE on this port according to following formula:

$a_{k,l}^{\left(p\right)}=w_{l^{\′\′}}\·r_{l,n_s}\left(m^{\′}\right);$

Wherein, be network side on the port that is numbered p, the reference numeral subcarrier that is k and be numbered the CSI-RS sending on the RE of OFDM symbol of l; n _sfor time slot sequence number, n _svalue be 0;

for the CSI-RS sequence of LTE system protocol definition; K, l, w _{l "}, m' value according to LTE system protocol determine, that is:

$w_{l^{\′\′}}=\left\{\begin{array}{cc}1& p\∈\left\{\mathrm{15,17,19,21}\right\}\\ {(-1)}^{l^{\′\′}}& p\∈\left\{\mathrm{16,18,20,22}\right\}\end{array}\right.$

l″＝0,1

$m=\mathrm{0,1},...,N_{\mathrm{RB}}^{\mathrm{DL}}-1$

The above-mentioned parameter (k', l') using while determining k, l according to LTE system protocol is as follows:

Sending the port number that uses of CSI-RS at network side is 1 or 2 o'clock: (k', l')=(11, 0), or (k', l')=(9, 0), or (k', l')=(7, 0), or (k', l')=(10, 0), or (k', l')=(8, 0), or (k', l')=(6, 0), or (k', l')=(5, 0), or (k', l')=(4, 0), or (k', l')=(3, 0), or (k', l')=(2, 0), or (k', l')=(1, 0), or (k', l')=(0, 0), or,

The port number using at network side transmission CSI-RS is 4 o'clock: (k', l')=(11,0), or (k', l')=(9,0), or (k', l')=(7,0), or (k', l')=(10,0), or (k', l')=(8,0), or (k', l')=(6,0); Or,

The port number using at network side transmission CSI-RS is 8 o'clock: (k', l')=(11,0), or (k', l')=(9,0), or (k', l')=(7,0).

Specifically can join and see the above table 3.3 kinds of CSI-RS transmission patterns of 8 ports of table 3 correspondence are as shown in Fig. 5 a-Fig. 5 c, and 6 kinds of CSI-RS transmission patterns of 4 ports of table 3 correspondence are as shown in Fig. 5 d-Fig. 5 i, and 12 kinds of CSI-RS transmission patterns of 1 or 2 ports of table 3 correspondence are as shown in Fig. 5 j-Fig. 5 u.

In step 4, can also determine that network side sends to terminal the CSI-RS sending on the RE that uses of CSI-RS and this each RE on this port according to following formula:

$a_{k,l}^{\left(p\right)}=w_{l^{\′\′}}\·r_{l,n_s}\left(m^{\′}\right);$

$k=k^{\′}+12m+\left\{\begin{array}{cc}-0-l^{\′\′}& \mathrm{for\; p}\∈\left\{\mathrm{15,16,19,20}\right\}\\ -6-l^{\′\′}& \mathrm{for\; p}\∈\left\{\mathrm{17,18,21,22}\right\}\end{array}\right.$

$l=l^{\′}+\left\{\begin{array}{cc}0& p\∈\left\{\mathrm{15,16,17,18}\right\}\\ 1& p\∈\left\{\mathrm{19,20,21,22}\right\}\end{array}\right.$

$w_{l^{\′\′}}=\left\{\begin{array}{cc}1& p\∈\left\{\mathrm{15,17,19,21}\right\}\\ {(-1)}^{l^{\′\′}}& p\∈\left\{\mathrm{16,18,20,22}\right\}\end{array}\right.$

l″＝0,1

$m=\mathrm{0,1},...,N_{\mathrm{RB}}^{\mathrm{DL}}-1$

Wherein,

that network side is on the port that is numbered p, by being numbered the subcarrier of k and being numbered the CSI-RS sending on the RE that the OFDM symbol of l forms; n _sfor time slot sequence number, n _svalue be 0;

for the CSI-RS sequence of LTE system protocol definition;

for the downlink bandwidth of network equipment and terminal work at present, for the maximum downstream bandwidth of system; The parameter (k', l') using while determining k, l meets the following conditions: k' is value in 1 to 11 odd number, and the value of l' is 0 or 1.

Concrete, sending the port number that uses of CSI-RS at network side is 1 or 2 o'clock: (k', l')=(11, 0), or (k', l')=(9, 0), or (k', l')=(7, 0), or (k', l')=(11, 1), or (k', l')=(9, 1), or (k', l')=(7, 1), or (k', l')=(5, 0), or (k', l')=(3, 0), or (k', l')=(1, 0), or (k', l')=(5, 1), or (k', l')=(3, 1), or (k', l')=(1, 1), or,

The port number using at network side transmission CSI-RS is 4 o'clock: (k', l')=(11,0), or (k', l')=(9,0), or (k', l')=(7,0), or (k', l')=(11,1), or (k', l')=(9,1), or (k', l')=(7,1); Or,

The port number using at network side transmission CSI-RS is 8 o'clock: (k', l')=(11,0), or (k', l')=(9,0), or (k', l')=(7,0).

Specifically as above shown in table 4.3 kinds of CSI-RS transmission patterns of 8 ports of table 4 correspondence are as shown in Fig. 6 a-Fig. 6 c, and 6 kinds of CSI-RS transmission patterns of 4 ports of table 4 correspondence are as shown in Fig. 6 d-Fig. 6 i, and 12 kinds of CSI-RS transmission patterns of 1 or 2 ports of table 4 correspondence are as shown in Fig. 6 j-Fig. 6 u.

Preferably, before step 4, terminal can be the configuration information that the mode that defines in LTE system protocol receives the CSI-RS transmission that network side sends according to prior art, and difference is only the parameter l that CSI-RS configuration information that this configuration information comprises and zero energy CSI-RS configuration information comprise ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

Preferably, before step 4, terminal can also receive at least one in following six kinds of configuration informations that network side sends by high-level signaling in advance:

CSI-RS port number, the number of the port using for definite network side transmission CSI-RS, terminal determines that according to CSI-RS port number network side sends the port that CSI-RS uses;

CSI-RS configuration information, the numbering of the CSI-RS configuration adopting for definite network side, the value (value of (k', l')) of the parameter using when every kind of CSI-RS configuration corresponding a kind of definite k, l; The shared bit number of this CSI-RS configuration information is not less than N, N is the number of CSI-RS configuration and the number sum of the CSI-RS configuration newly increasing defining in LTE system protocol, wherein corresponding a kind of CSI-RS configuration of each bit, such as, if a certain bit is 0, represent the CSI-RS configuration that does not adopt this bit corresponding, if 1, the CSI-RS configuration that adopts this bit corresponding represented; Terminal is determined the value of (k', l') according to CSI-RS configuration information, and then determines that according to the value of (k', l') network side sends to terminal the CSI-RS sending on RE that CSI-RS uses and this each RE on corresponding ports;

CSI-RS subframe configuration information, for determining that network side sends the subframe that CSI-RS uses; This CSI-RS subframe configuration information can comprise CSI-RS transmission cycle and sub-frame offset, suppose that CSI-RS transmission cycle is T, sub-frame offset is 2, and terminal can determine that second subframe in each CSI-RS transmission cycle T is the subframe that network side sends CSI-RS place;

The ratio of the performance number of every RE of the performance number of the every RE on PDSCH and transmission CSI-RS, for determining the received power of CSI-RS; Performance number/this ratio of every RE on performance number=PDSCH of every RE of the definite transmission of terminal CSI-RS;

Zero energy CSI-RS configuration information, for determining that network side does not send the numbering of the CSI-RS configuration of CSI-RS; The shared bit number of this zero energy CSI-RS configuration information is not less than M, M is the number of zero energy CSI-RS configuration and the number sum of the zero energy CSI-RS configuration newly increasing defining in LTE system protocol, wherein corresponding a kind of zero energy CSI-RS configuration of each bit, such as, if a certain bit is 0, the CSI-RS that this bit is corresponding is configured to non-zero power CSI-RS configuration, if 1, represent to adopt CSI-RS corresponding to this bit to be configured to zero energy CSI-RS configuration; Terminal, in the time determining that the CSI-RS adopting is configured to zero energy CSI-RS configuration, is not carried out the reception of CSI-RS;

Zero energy CSI-RS subframe configuration information, for determining that network side does not send the numbering of the subframe of CSI-RS.Terminal does not receive CSI-RS in zero energy CSI-RS subframe.

Preferably, terminal can also receive at least one in following six kinds of configuration informations that network side sends by high-level signaling in advance:

CSI-RS port number, the number of the port using for definite network side transmission CSI-RS; Terminal determines that according to CSI-RS port number network side sends the port that CSI-RS uses;

CSI-RS configuration information, the numbering of the CSI-RS configuration adopting for definite network side, the value (value of (k', l')) of the parameter using when every kind of CSI-RS configuration corresponding a kind of definite k, l; The shared bit number of this CSI-RS configuration information is not less than P, and P is the number of the CSI-RS configuration that newly increases; Wherein corresponding a kind of CSI-RS configuration of each bit, such as, if a certain bit is 0, represent not adopt the CSI-RS that this bit is corresponding to configure, if 1, the CSI-RS configuration that adopts this bit corresponding represented; Terminal is determined the value of (k', l') according to CSI-RS configuration information, and then determines that according to the value of (k', l') network side sends to terminal the CSI-RS sending on RE that CSI-RS uses and this each RE on corresponding ports;

CSI-RS subframe configuration information, for determining that network side sends the subframe that CSI-RS uses; This CSI-RS subframe configuration information can comprise CSI-RS transmission cycle and sub-frame offset, suppose that CSI-RS transmission cycle is T, sub-frame offset is 2, and terminal can determine that second subframe in each CSI-RS transmission cycle T is the subframe that network side sends CSI-RS place;

The ratio of the performance number of every RE of the performance number of the every RE on PDSCH and transmission CSI-RS, for determining the received power of CSI-RS; Performance number/this ratio of every RE on performance number=PDSCH of every RE of the definite transmission of terminal CSI-RS;

Zero energy CSI-RS configuration information, for determining that network side does not send the numbering of the CSI-RS configuration of CSI-RS; The shared bit number of this zero energy CSI-RS configuration information is not less than K, K is the number of the zero energy CSI-RS configuration that newly increases, wherein corresponding a kind of zero energy CSI-RS configuration of each bit, such as, if a certain bit is 0, the CSI-RS that this bit is corresponding is configured to non-zero power CSI-RS configuration, if 1, represent to adopt CSI-RS corresponding to this bit to be configured to zero energy CSI-RS configuration; Terminal, in the time determining that the CSI-RS adopting is configured to zero energy CSI-RS configuration, is not carried out the reception of CSI-RS;

Zero energy CSI-RS subframe configuration information, for determining that network side does not send the numbering of the subframe of CSI-RS.Terminal does not receive CSI-RS in zero energy CSI-RS subframe.

Referring to Fig. 7, the embodiment of the present invention also provides a kind of base station, and this base station comprises:

Determining unit 70, sends for determining the configuration information that CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Transmitting element 71, for sending corresponding CSI-RS according to definite configuration information to terminal.

Further, in the indicated compression CSI-RS structure of the definite configuration information of described determining unit 70, the CSI-RS resource that each CSI-RS port is corresponding is made up of Y the RE that time domain is adjacent or frequency domain is adjacent, and wherein Y is greater than 1 positive integer; And,

For CSI-RS resource corresponding to each CSI-RS port, this CSI-RS resource is multiplexing by the CSI-RS of Y CSI-RS port at most.

Further, the definite configuration information of described determining unit 70 comprises CSI-RS configuration information and zero energy CSI-RS configuration information all comprise parameter l ' and mod (n _s, 2);

L ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

Further, the CSI-RS that the definite configuration information of described determining unit 70 comprises configures corresponding kind number and is not less than P, and P is the kind number of the CSI-RS configuration of corresponding compression CSI-RS structure;

The shared bit number of zero energy CSI-RS configuration information that the definite configuration information of described determining unit 70 comprises is not less than K, and K is the kind number of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure.

Further, the CSI-RS that the definite configuration information of described determining unit 70 comprises configures corresponding kind number and is not less than M, and M is the kind number of CSI-RS configuration and the kind number sum of the CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol;

The shared bit number of zero energy CSI-RS configuration information that the definite configuration information of described determining unit 70 comprises is not less than N, and N is the kind number of zero energy CSI-RS configuration and the kind number sum of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol.

Referring to Fig. 8, the embodiment of the present invention also provides a kind of terminal, and this terminal comprises:

Determining unit 80, for determining that network side sends the configuration information that CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Receiving element 81, for receiving according to definite configuration information the CSI-RS that network side sends.

Further, in the indicated compression CSI-RS structure of the definite configuration information of described determining unit 80, the CSI-RS resource that each CSI-RS port is corresponding is made up of Y the RE that time domain is adjacent or frequency domain is adjacent, and wherein Y is greater than 1 positive integer; And,

For CSI-RS resource corresponding to each CSI-RS port, this CSI-RS resource is multiplexing by the CSI-RS of Y CSI-RS port at most.

Further, the definite configuration information of described determining unit 80 comprises CSI-RS configuration information and zero energy CSI-RS configuration information all comprise parameter l ' and mod (n _s, 2);

L ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

Further, the CSI-RS that the definite configuration information of described determining unit 80 comprises configures corresponding kind number and is not less than P, and P is the kind number of the CSI-RS configuration of corresponding compression CSI-RS structure;

The shared bit number of zero energy CSI-RS configuration information that the definite configuration information of described determining unit comprises is not less than K, and K is the kind number of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure.

Further, the CSI-RS that the definite configuration information of described determining unit 80 comprises configures corresponding kind number and is not less than M, and M is the kind number of CSI-RS configuration and the kind number sum of the CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol;

The shared bit number of zero energy CSI-RS configuration information that the definite configuration information of described determining unit 80 comprises is not less than N, and N is the kind number of zero energy CSI-RS configuration and the kind number sum of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol.

To sum up, beneficial effect of the present invention comprises:

In the scheme that the embodiment of the present invention provides; network side sends CSI-RS in the first two OFDM of subframe symbol; terminal receives CSI-RS on the first two OFDM of subframe symbol; visible; the scheme of the first two OFDM symbol transmission CSI-RS that this method has realized in subframe; in the time that this scheme is applied on TDD guard band and NCT carrier wave, the first two OFDM symbol of subframe is fully used, and then has reduced the waste of running time-frequency resource.

The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by 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 the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.

Although described the preferred embodiments of the present invention, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to be interpreted as comprising preferred embodiment and fall into all changes and the modification of the scope of the invention.

Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.

Claims (20)

1. a transmission method of channel state information reference signals CSI-RS, is characterized in that, the method comprises:

Network side is determined the configuration information that transmission CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Network side sends corresponding CSI-RS according to definite configuration information to terminal.

2. the method for claim 1, is characterized in that, in described compression CSI-RS structure, the CSI-RS resource that each CSI-RS port is corresponding is made up of Y the RE that time domain is adjacent or frequency domain is adjacent, and wherein Y is greater than 1 positive integer; And,

For CSI-RS resource corresponding to each CSI-RS port, this CSI-RS resource is multiplexing by the CSI-RS of Y CSI-RS port at most.

3. the method for claim 1, is characterized in that, the CSI-RS configuration information that described configuration information comprises and zero energy CSI-RS configuration information all comprise parameter l ' and mod (n _s, 2);

L ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

4. the method for claim 1, is characterized in that, the CSI-RS that described configuration information comprises configures corresponding kind number and is not less than P, and P is the kind number of the CSI-RS configuration of corresponding compression CSI-RS structure;

The shared bit number of zero energy CSI-RS configuration information that described configuration information comprises is not less than K, and K is the kind number of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure.

5. the method for claim 1, it is characterized in that, the CSI-RS that described configuration information comprises configures corresponding kind number and is not less than M, and M is the kind number of CSI-RS configuration and the kind number sum of the CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol;

The shared bit number of zero energy CSI-RS configuration information that described configuration information comprises is not less than N, and N is the kind number of zero energy CSI-RS configuration and the kind number sum of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol.

6. a transmission method of channel state information reference signals CSI-RS, is characterized in that, the method comprises:

Terminal determines that network side sends the configuration information that CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Terminal receives according to definite configuration information the CSI-RS that network side sends.

7. method as claimed in claim 6, is characterized in that, in described compression CSI-RS structure, the CSI-RS resource that each CSI-RS port is corresponding is made up of Y the RE that time domain is adjacent or frequency domain is adjacent, and wherein Y is greater than 1 positive integer; And,

For CSI-RS resource corresponding to each CSI-RS port, this CSI-RS resource is multiplexing by the CSI-RS of Y CSI-RS port at most.

8. method as claimed in claim 6, is characterized in that, the CSI-RS configuration information that described configuration information comprises and zero energy CSI-RS configuration information all comprise parameter l ' and mod (n _s, 2);

L ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

9. method as claimed in claim 6, is characterized in that, the CSI-RS that described configuration information comprises configures corresponding kind number and is not less than P, and P is the kind number of the CSI-RS configuration of corresponding compression CSI-RS structure;

The shared bit number of zero energy CSI-RS configuration information that described configuration information comprises is not less than K, and K is the kind number of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure.

10. method as claimed in claim 6, it is characterized in that, the CSI-RS that described configuration information comprises configures corresponding kind number and is not less than M, and M is the kind number of CSI-RS configuration and the kind number sum of the CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol;

The shared bit number of zero energy CSI-RS configuration information that described configuration information comprises is not less than N, and N is the kind number of zero energy CSI-RS configuration and the kind number sum of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol.

11. 1 kinds of base stations, is characterized in that, this base station comprises:

Determining unit, sends for determining the configuration information that CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Transmitting element, for sending corresponding CSI-RS according to definite configuration information to terminal.

12. base stations as claimed in claim 11, it is characterized in that, in the indicated compression CSI-RS structure of the definite configuration information of described determining unit, the CSI-RS resource that each CSI-RS port is corresponding is made up of Y the RE that time domain is adjacent or frequency domain is adjacent, and wherein Y is greater than 1 positive integer; And,

For CSI-RS resource corresponding to each CSI-RS port, this CSI-RS resource is multiplexing by the CSI-RS of Y CSI-RS port at most.

13. base stations as claimed in claim 11, is characterized in that, the CSI-RS configuration information that the definite configuration information of described determining unit comprises and zero energy CSI-RS configuration information all comprise parameter l ' and mod (n _s, 2);

L ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

14. base stations as claimed in claim 11, is characterized in that, the CSI-RS that the definite configuration information of described determining unit comprises configures corresponding kind number and is not less than P, and P is the kind number of the CSI-RS configuration of corresponding compression CSI-RS structure;

The shared bit number of zero energy CSI-RS configuration information that the definite configuration information of described determining unit comprises is not less than K, and K is the kind number of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure.

15. base stations as claimed in claim 11, it is characterized in that, the CSI-RS that the definite configuration information of described determining unit comprises configures corresponding kind number and is not less than M, and M is the kind number of CSI-RS configuration and the kind number sum of the CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol;

The shared bit number of zero energy CSI-RS configuration information that the definite configuration information of described determining unit comprises is not less than N, and N is the kind number of zero energy CSI-RS configuration and the kind number sum of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol.

16. 1 kinds of terminals, is characterized in that, this terminal comprises:

Determining unit, for determining that network side sends the configuration information that CSI-RS uses; Described configuration information indication network side adopts compression CSI-RS structural transmission CSI-RS; In the described Resource Unit RE compressing in front X the orthogonal frequency division multiplex OFDM symbol of CSI-RS all in CSI-RS structure in descending sub frame or descending time slot, transmit, wherein X is not more than 3 positive integer;

Receiving element, for receiving according to definite configuration information the CSI-RS that network side sends.

17. terminals as claimed in claim 16, it is characterized in that, in the indicated compression CSI-RS structure of the definite configuration information of described determining unit, the CSI-RS resource that each CSI-RS port is corresponding is made up of Y the RE that time domain is adjacent or frequency domain is adjacent, and wherein Y is greater than 1 positive integer; And,

For CSI-RS resource corresponding to each CSI-RS port, this CSI-RS resource is multiplexing by the CSI-RS of Y CSI-RS port at most.

18. terminals as claimed in claim 16, is characterized in that, the CSI-RS configuration information that the definite configuration information of described determining unit comprises and zero energy CSI-RS configuration information all comprise parameter l ' and mod (n _s, 2);

L ' and mod (n _s, 2) value be 0, wherein n _sfor the numbering of CSI-RS resource place time slot, the numbering of first OFDM symbol that l ' takies in time slot for CSI-RS resource.

19. terminals as claimed in claim 16, is characterized in that, the CSI-RS that the definite configuration information of described determining unit comprises configures corresponding kind number and is not less than P, and P is the kind number of the CSI-RS configuration of corresponding compression CSI-RS structure;

The shared bit number of zero energy CSI-RS configuration information that the definite configuration information of described determining unit comprises is not less than K, and K is the kind number of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure.

20. terminals as claimed in claim 16, it is characterized in that, the CSI-RS that the definite configuration information of described determining unit comprises configures corresponding kind number and is not less than M, and M is the kind number of CSI-RS configuration and the kind number sum of the CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol;

The shared bit number of zero energy CSI-RS configuration information that the definite configuration information of described determining unit comprises is not less than N, and N is the kind number of zero energy CSI-RS configuration and the kind number sum of the zero energy CSI-RS configuration of corresponding compression CSI-RS structure defining in LTE-A system protocol.

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