CN102378114A - Transmitting method and device of channel status information reference signal and receiving method and device of channel status information reference signal - Google Patents
Transmitting method and device of channel status information reference signal and receiving method and device of channel status information reference signal Download PDFInfo
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Abstract
本发明公开了一种信道状态信息参考信号发送方法及装置、接收方法及装置，针对每个小区，分别在MBSFN子帧的每个PRB包含的、除承载PDCCH、CRS和DM-RS的RE之外的RE中，确定承载CSI-RS的RE，然后将需要发送给该小区的CSI-RS映射到确定出的RE中，将该MBSFN子帧发送给各小区中的用户终端。本发明提供了基站在MBSFN子帧中发送CSI-RS以及用户终端在MBSFN子帧中接收CSI-RS的具体技术方案。
The present invention discloses a channel state information reference signal sending method and device, receiving method and device, for each cell, in each PRB of an MBSFN subframe, except REs carrying PDCCH, CRS and DM-RS Among the other REs, the REs bearing the CSI-RS are determined, and then the CSI-RS to be sent to the cell is mapped to the determined RE, and the MBSFN subframe is sent to the user terminal in each cell. The invention provides a specific technical solution for the base station to send the CSI-RS in the MBSFN subframe and the user terminal to receive the CSI-RS in the MBSFN subframe.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular to a kind of channel state information reference signals sending method and device, method of reseptance and device.
Background technology
(Reference Signal is by the base station a kind of known signal that sends to user terminal to be provided RS) to reference signal, is used for user terminal and carries out channel estimating or channel measurement.At present, 4 kinds of RS in 3G (Third Generation) Moblie gpp (3GPP, 3rd Generation partnership project), have been defined: the 8th version (R8; Release 8) public reference signal (CRS; Common Reference Signal), the DRS (Dedicated Reference Signal) of R8 (DRS, Dedicated Reference Signal); The 10th version (R10; Release 10) demodulated reference signal (DM-RS, Demodulated Reference Signal) and the channel state information reference signals (CSI-RS, Channel State Information Reference Signal) of R10.
In OFDM (OFDM, the Orthogonal Frequency Division Multiplexing) system, a Physical Resource Block (PRB; Physical Resource Block) on frequency domain, takies 12 continuous sub-carriers, on time domain, take 14 or 12 continuous OFDM symbols, wherein when adopting conventional (Normal) Cyclic Prefix (CP; Cylic Prefix) time, a PRB takies 14 continuous OFDM symbols, when adopting expansion (Extended) CP; A PRB takies 12 continuous OFDM symbols; In PRB, RS is to be unit with Resource Unit (RE, Resource Element); A RS takies several RE on the PRB, and one of them RE is the number of sub-carrier on the OFDM symbol.
At present; The base station is sent the method for CRS, DRS and DM-RS and is confirmed in common subframe; Confirmed that promptly which RE that takies in which common subframe sends above-mentioned RS; Wherein Figure 1A is for sending the PRB sketch map of CRS, DRS and DM-RS in the common subframe that adopts Normal CP, and Figure 1B is for sending the PRB sketch map of CRS, DRS and DM-RS in the common subframe that adopts Extended CP.
Yet; How the base station is at multimedia broadcasting SFN (MBSFN; Multimedia Broadcast Single Frequency Network) sends CSI-RS in the subframe; Do not provide concrete technical scheme in the prior art, how user terminal receives CSI-RS in the MBSFN subframe, does not also provide concrete technical scheme in the prior art.
Summary of the invention
The embodiment of the invention provides a kind of channel state information reference signals sending method and device, method of reseptance and device, in the MBSFN subframe, sends CSI-RS and user terminal receive CSI-RS in the MBSFN subframe concrete technical scheme in order to the base station to be provided.
Accordingly, the embodiment of the invention also provides a kind of base station and user terminal.
Embodiment of the invention technical scheme is following:
A kind of channel state information reference signals sending method; The method comprising the steps of: to each sub-district; Comprise at each Physical Resource Block PRB of multimedia broadcasting SFN MBSFN subframe respectively, among the RE except that the Resource Unit RE that carries physical downlink control channel PDCCH, public reference signal CRS and demodulated reference signal DM-RS, confirm the RE of Bearer Channel state information reference signals CSI-RS; The CSI-RS that needs is sent to this sub-district is mapped among the RE that determines; Said MBSFN subframe is sent to the user terminal in each sub-district.
A kind of channel state information reference signals dispensing device; Comprise: confirm the unit; Be used for to each sub-district; Comprise at each Physical Resource Block PRB of multimedia broadcasting SFN MBSFN subframe, among the RE except that the Resource Unit RE that carries physical downlink control channel PDCCH, public reference signal CRS and demodulated reference signal DM-RS, confirm the RE of Bearer Channel state information reference signals CSI-RS; Map unit is used for the CSI-RS that needs send to this sub-district is mapped to the RE that confirms that the unit is determined; Transmitting element is used for the MBSFN subframe after the map unit mapping is sent to the user terminal of each sub-district.
A kind of channel state information reference signals method of reseptance; The method comprising the steps of: among each Physical Resource Block PRB that the multimedia broadcasting SFN MBSFN subframe that user terminal sends in the base station is comprised; Respectively to self sub-district, place; Comprise at this PRB, among the RE except that the Resource Unit RE that carries physical downlink control channel PDCCH, public reference signal CRS and demodulated reference signal DM-RS, confirm the RE of Bearer Channel state information reference signals CSI-RS; From the RE that determines, receive CSI-RS.
A kind of channel state information reference signals receiving system; Comprise: confirm the unit; Each Physical Resource Block PRB that the multimedia broadcasting SFN MBSFN subframe that is used for sending in the base station is comprised; To the sub-district, place, among the RE the Resource Unit RE that comprises at this PRB, remove carrying physical downlink control channel PDCCH, public reference signal CRS and demodulated reference signal DM-RS, confirm the RE of Bearer Channel state information reference signals CSI-RS respectively; Receiving element is used for from confirming that the RE that the unit is determined receives CSI-RS.
In the embodiment of the invention technical scheme; To each sub-district; Comprise at each PRB of MBSFN, among the RE except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, the CSI-RS that then needs is sent to this sub-district is mapped among the RE that determines; This MBSFN subframe is sent to the user terminal in each sub-district; Thereby realized in the MBSFN subframe, sending the scheme of CSI-RS,, therefore just avoided PDCCH, CRS and DM-RS that CSI-RS is produced and disturbed owing to carry CSI-RS based on the RE except that the RE that carries PDCCH, CRS and DM-RS.
Description of drawings
Figure 1A is in the prior art, in the common subframe that adopts Normal CP, sends the PRB sketch map of CRS, DRS and DM-RS;
Figure 1B is in the prior art, in the common subframe that adopts Extended CP, sends the PRB sketch map of CRS, DRS and DM-RS;
Fig. 2 is in the embodiment of the invention, channel state information reference signals sending method schematic flow sheet;
Fig. 3 A is in the embodiment of the invention, to the MBSFN subframe that adopts Normal CP, sends the PRB sketch map of PDCCH, CRS and DM-RS;
Fig. 3 B is in the embodiment of the invention, to the MBSFN subframe that adopts Extended CP, sends the PRB sketch map of PDCCH, CRS and DM-RS;
Fig. 4 A～Fig. 4 I is in the embodiment of the invention, to the MBSFN subframe that adopts Normal CP, and the CSI-RS Pattern sketch map of CSI-RS port number when being 2;
Fig. 5 A～Fig. 5 C is in the embodiment of the invention, to the MBSFN subframe that adopts Extended CP, and the CSI-RS Pattern sketch map of CSI-RS port number when being 2;
Fig. 6 A～Fig. 6 H is in the embodiment of the invention, to the MBSFN subframe that adopts Normal CP, and the CSI-RS Pattern sketch map of CSI-RS port number when being 4;
Fig. 7 A～Fig. 7 D is in the embodiment of the invention, to the MBSFN subframe that adopts Extended CP, and the CSI-RS Pattern sketch map of CSI-RS port number when being 4;
Fig. 8 A～Fig. 8 J is in the embodiment of the invention, to the MBSFN subframe that adopts Normal CP, and the CSI-RS Pattern sketch map of CSI-RS port number when being 8;
Fig. 9 A～Fig. 9 D is in the embodiment of the invention, to the MBSFN subframe that adopts Extended CP, and the CSI-RS Pattern sketch map of CSI-RS port number when being 8;
Figure 10 A～Figure 10 K is in the embodiment of the invention, and the multiplexing factor is 3 o'clock, in the MBSFN subframe, sends the PRB sketch map of CSI-RS;
Figure 11 is in the embodiment of the invention, and the multiplexing factor is 4 o'clock, in the MBSFN subframe, sends the PRB sketch map of CSI-RS;
Figure 12 is in the embodiment of the invention, and the multiplexing factor is 5 o'clock, in the MBSFN subframe, sends the PRB sketch map of CSI-RS;
Figure 13 A～13C is in the embodiment of the invention, the sketch map of the PRB that two frequency domains of transmission CSI-RS are adjacent in the MBSFN subframe;
Figure 14 is in the embodiment of the invention, channel state information reference signals dispensing device structural representation;
Figure 15 is in the embodiment of the invention, channel state information reference signals method of reseptance schematic flow sheet;
Figure 16 is in the embodiment of the invention, channel state information reference signals receiving system structural representation.
Embodiment
At length set forth to the main realization principle of embodiment of the invention technical scheme, embodiment and to the beneficial effect that should be able to reach below in conjunction with each accompanying drawing.
In order to support multiple-input and multiple-output (MIMO; Multiple-Input-Multiple-Output) transmission; When CSI-RS is sent to user terminal in the base station, can send CSI-RS based on 2 CSI-RS ports, data flow transmitted is 2 data flow between base station and the user terminal at this moment; Also can send CSI-RS based on 4 CSI-RS ports; Data flow transmitted is 4 data flow between base station and the user terminal at this moment, can also send CSI-RS based on 8 CSI-RS ports, and data flow transmitted is 8 data flow between base station and the user terminal at this moment.
In the embodiment of the invention, the expense that 2 CSI-RS ports, 4 CSI-RS ports and 8 CSI-RS ports are sent the RE of CSI-RS is made as: 1RE and port and PRB that is to say that on each PRB each DM-RS port only takies 1 RE transmission CSI-RS.
As shown in Figure 2, be CSI-RS sending method flow chart in the embodiment of the invention, its concrete processing procedure is following:
If base station each user terminal in each sub-district in the MBSFN subframe sends CSI-RS; Then can in each PRB in this MBSFN subframe, issue, wherein all carry the CSI-RS that issues to a plurality of sub-districts among each PRB, not overlapping to the RE that the CSI-RS of each sub-district transmission is shared; Be that a plurality of sub-districts are realized multiplexing in each PRB; The CSI-RS that send to a plurality of sub-districts this moment does not disturb mutually, if the multiplexing factor is 3, then in each PRB of MBSFN subframe; The shared RE of CSI-RS that sends to three sub-districts does not have overlapping fully, and the CSI-RS pattern (Pattern) that the shared RE of CSI-RS that promptly sends to each sub-district forms is mutually orthogonal.
In the PRB of MBSFN subframe; Preceding two OFDM symbols are used to transmit PDCCH and CRS; For fear of PDCCH, CRS and DM-RS CSI-RS is produced interference; The embodiment of the invention proposes in RE that each PRB comprised, except that the RE that carries PDCCH, CRS and DM-RS, to confirm to carry the RE of CSI-RS.
Wherein to the MBSFN subframe that adopts Normal CP; DM-RS can but be not limited to take on the 3rd, the 4th, the 13rd of being arranged in order by the order after arriving first and the 14th the OFDM symbol according to the time according to the 1st, the 2nd, the 6th, the 7th, the 11st and the 12nd number of sub-carrier being arranged in order to the order of high frequency by low frequency; This moment, CSI-RS can take subcarrier on the 3rd, the 4th, the 13rd and the 14th the OFDM symbol, that do not carry DM-RS; The 3rd, the 4th, the 5th, the 8th, the 9th or the 10th number of sub-carrier on promptly the 3rd, the 4th, the 13rd and the 14th the OFDM symbol, CSI-RS can also take the norator carrier wave on the 5th, the 6th, the 7th, the 8th, the 9th, the 10th, the 11st and the 12nd the OFDM symbol; To the MBSFN subframe that adopts Extended CP; DM-RS can but be not limited to take the experimental process carrier wave on the 3rd, the 4th, the 11st and the 12nd the OFDM symbol; This moment, CSI-RS can take subcarrier on the 3rd, the 4th, the 11st and the 12nd the OFDM symbol, that do not carry DM-RS, and CSI-RS can also take the norator carrier wave on the 5th, the 6th, the 7th, the 8th, the 9th, the 10th, the 11st and the 12nd the OFDM symbol.
Fig. 3 A is for sending the PRB sketch map of PDCCH, CRS and DM-RS in the MBSFN subframe that adopts Normal CP; Fig. 3 B is for sending the PRB sketch map of PDCCH, CRS and DM-RS in the MBSFN subframe that adopts Extended CP; Because uncertain DM-RS takies which subcarrier on the 3rd, the 4th, the 11st and the 12nd the OFDM symbol; Therefore in Fig. 3 B, all subcarriers on the 3rd, the 4th, the 11st and the 12nd the OFDM symbol all are designated the subcarrier that carries DM-RS; DM-RS possibly only take some subcarriers on the 3rd, the 4th, the 11st and the 12nd the OFDM symbol in fact, rather than whole subcarriers.
In the embodiment of the invention; Can be at the white space among Fig. 3 A and Fig. 3 B, the RE that chooses defined amount arbitrarily carries CSI-RS (choosing in the subcarrier also can be in Fig. 3 B on the 3rd, the 4th, the 11st and the 12nd the OFDM symbol, that do not carry DM-RS).
Below in detail introduction how to confirm to carry the RE of CSI-RS.
The base station has a plurality of CSI-RS ports to be used to send CSI-RS; In advance the CSI-RS port is divided at least one CSI-RS port set; The quantity of the CSI-RS port that each CSI-RS port set comprises is 2, if the quantity of CSI-RS port is 2, then all CSI-RS ports is divided into a CSI-RS port set; If the quantity of CSI-RS port is 4; Then all CSI-RS ports on average are divided into two CSI-RS port set,, then all CSI-RS ports on average are divided into 4 CSI-RS port set if the quantity of CSI-RS port is 8.
To each CSI-RS port; Comprise at each PRB of MBSFN subframe, among the RE except that the RE that carries PDCCH, CRS and DM-RS; Confirm to carry the RE of CSI-RS; Wherein, the RE that is determined to each the CSI-RS port in the same CSI-RS port set is identical, and the RE that is determined to the CSI-RS port in the different CSI-RS port set is different; That is to say that each the CSI-RS port in the same CSI-RS port set takies identical RE transmission CSI-RS; And each the CSI-RS port in the different CSI-RS port set takies different RE transmission CSI-RS, and the CSI-RS that each the CSI-RS port in the therefore different CSI-RS port set sends adopts frequency division multiplexing, and (FDM, mode Frequency-DivisionMultiplexing) is distinguished.
Confirm to carry to each CSI-RS port CSI-RS RE concrete mode can but be not limited to as follows:
To each CSI-RS port, at first comprise at each PRB of MBSFN subframe, select 1 or 2 OFDM symbols in the OFDM symbol except that the OFDM symbol that carries PDCCH and CRS, can but be not limited to realize through following manner; With each PRB of MBSFN subframe OFDM symbol combination that comprise, except that the OFDM symbol that carries PDCCH and CRS is several OFDM symbols, and each OFDM symbols comprises 1 OFDM symbol or 2 OFDM symbols, if comprise two OFDM symbols; Then these two OFDM symbols can be adjacent, also can be non-conterminous, in the OFDM symbols that is combined into; Select an OFDM symbols; Among the RE the RE that is comprised at the OFDM symbol of selecting, remove carrying DM-RS, it is right that per two RE on the same sub-carrier or the adjacent RE of per two number of sub-carrier on the identical OFDM symbol are combined as a RE, the RE centering that is being combined into; Select at least one RE right; With each RE of each RE centering of selecting, confirm as the RE that carries CSI-RS, wherein if each OFDM symbols comprises 2 adjacent OFDM symbols; Then preferably, can per two RE that OFDM symbol on the same sub-carrier is adjacent to be combined as a RE right.
To the MBSFN subframe that adopts Normal CP,, then can be combined as 12 OFDM symbols if comprise an OFDM symbol in each OFDM symbols; To the MBSFN subframe that adopts Extended CP,, then can be combined as 10 OFDM symbols if comprise an OFDM symbol in each OFDM symbols.
For with common subframe in CSI-RS Pattern be consistent; The embodiment of the invention is established each CSI-RS port when sending CSI-RS; Take 2 RE on the PRB; Two RE that one of them CSI-RS port takies can be for two on the same OFDM symbol adjacent or non-conterminous subcarrier; Also can be the same subcarrier on two adjacent or non-conterminous OFDM symbols, in addition, two RE that the CSI-RS port takies can also corresponding different OFDM symbol and different subcarriers.Therefore; Can but be not limited in the OFDM symbols that is combined into to select an OFDM symbols, if comprise an OFDM symbol in the OFDM symbols of combination, then selected an OFDM symbol; If comprise two adjacent OFDM symbols in the OFDM symbols of combination; Then selected two adjacent OFDM symbols, in addition, can but be not limited to select a RE right the RE centering that is combined into; If selected an OFDM symbol; The RE that then selects is right to the RE that forms for the adjacent RE of two number of sub-carrier on the OFDM symbol of selecting, if selected two adjacent OFDM symbols, the RE that then selects is right to the RE that forms for the adjacent RE of two OFDM symbols on the same sub-carrier.
For the CSI-RS that each CSI-RS port of distinguishing in the same CSI-RS port set sends, the embodiment of the invention proposes to adopt the mode of code division multiplexing (CDM, Code-Division Multiplexing) to distinguish; For distributing an orthogonal intersection (OCC respectively for each the CSI-RS port in each CSI-RS port set; Orthogonal Cover Code), wherein owing to comprise two CSI-RS ports in each CSI-RS port set, the length of the OCC that therefore distributes is 2; To each the CSI-RS port in each CSI-RS port set; According to the OCC that distributes, the CSI-RS that RE carried of each the RE centering that will select to this CSI-RS port respectively sends to the user terminal in each sub-district, wherein; When two RE of RE centering are the adjacent RE of two number of sub-carrier on the same OFDM symbol; Be the CDM on the frequency domain, when two RE of RE centering are the adjacent RE of two OFDM symbols on the same subcarrier, be the CDM on the time domain.
For example, CSI-RS port 0 is formed a CSI-RS port set with the CSI-RS port one, and wherein CSI-RS port 0 takies identical RE with the CSI-RS port one and sends CSI-RS; The OCC that distributes for CSI-RS port 0 is (1 ,-1), and the OCC that distributes for the CSI-RS port one is (1; 1), the RE that selects to CSI-RS port 0 and CSI-RS port one to be the 5th with the 6th OFDM symbol on the RE that forms of the 12nd number of sub-carrier right, CSI-RS port 0 basis (1;-1), the CSI-RS that RE carried with this RE centering sends to user terminal, CSI-RS port one basis (1; 1), the CSI-RS that RE carried with this RE centering sends to user terminal.
In order to utilize bigger power to send CSI-RS as far as possible; The embodiment of the invention proposes; When the CDM on adopting frequency domain distinguished the CSI-RS that each the CSI-RS port in the same CSI-RS port set sent, to each the CSI-RS port in any CSI-RS port set, the RE that in two adjacent PRB of frequency domain, selects respectively was different to pairing OFDM symbol; For example; The CSI-RS port one takies the 11st and the 12nd number of sub-carrier transmission CSI-RS on the 5th the OFDM symbol in PRB1, then the CSI-RS port one takies the 11st and the 12nd number of sub-carrier transmission CSI-RS on the 6th the OFDM symbol in PRB2, and wherein PRB1 and PRB2 are two adjacent on frequency domain PRB; When PRB1 sends CSI-RS on the 5th OFDM symbol like this; Because its PRB2 sends CSI-RS on the 6th OFDM symbol, so PRB1 can use the transmitted power of PRB2 on the 5th OFDM symbol, and then the power that makes each PRB all use to try one's best big sends CSI-RS.For example, can make two CSI-RS port set on two frequency domains, alternately send the OFDM character position of CSI-RS among the adjacent PRB each other.
In addition, for the interference between the CSI-RS that reduces neighbor cell, neighbor cell should be avoided taking identical RE as far as possible and send CSI-RS; Promptly on identical OFDM symbol, neighbor cell should take different subcarriers as far as possible and send CSI-RS, perhaps on the same sub-carrier; Neighbor cell should take different OFDM symbols as far as possible and send CSI-RS; The RE that promptly selects respectively to neighbor cell for the ease of networking, should make that the multiplexing factor of CSI-RS Pattern is big as far as possible to non-overlapping copies; Usually, this multiplexing factor is not less than 3.
The various CSI-RS Pattern that propose in the face of the embodiment of the invention down describe in detail.
First kind of situation: the MBSFN subframe adopts Normal CP, and the CSI-RS port number is 2 (CSI-RS ports 0 and CSI-RS port one):
Because preceding two OFDM symbols are used to pass PDCCH and CRS; If in the 3rd, the 4th, the 13rd and the 14th the OFDM symbol the 1st, the 2nd, the 6th, the 7th, the 11st and the 12nd number of sub-carrier are used to transmit DM-RS, the RE that then transmits CSI-RS need choose from remaining RE.
If with synthetic several OFDM symbols of the 3rd～the 14th OFDM symbols, comprise 1 OFDM symbol in each OFDM symbols in advance, select one of them OFDM symbols, can be shown in Fig. 4 A; Select the 3rd OFDM symbol, shown in Fig. 4 B, select the 4th OFDM symbol; Shown in Fig. 4 C, select the 5th OFDM symbol, shown in Fig. 4 D; Select the 6th OFDM symbol, shown in Fig. 4 E, select the 13rd OFDM symbol; Shown in Fig. 4 F, select the 14th OFDM symbol, it is right that RE in the OFDM symbol of selecting, except that the RE that carries DM-RS is combined as several RE; The subcarrier of the RE of each RE centering is adjacent, selects a RE to carrying CSI-RS the RE centering that is combined into, the CSI-RS Pattern of this moment can but be not limited to shown in Fig. 4 A～4F.
In Fig. 4 A, any two adjacent sub-carriers that can choose on the 3rd the OFDM symbol the 3rd, the 4th, the 5th, the 8th, the 9th and the 10th number of sub-carrier carry CSI-RS;
In Fig. 4 B, any two adjacent sub-carriers that can choose on the 4th the OFDM symbol the 3rd, the 4th, the 5th, the 8th, the 9th and the 10th number of sub-carrier carry CSI-RS;
In Fig. 4 C, can choose any RE on the 5th the OFDM symbol to carrying CSI-RS;
In Fig. 4 D, can choose any RE on the 6th the OFDM symbol to carrying CSI-RS;
In Fig. 4 E, any two adjacent sub-carriers that can choose on the 13rd the OFDM symbol the 3rd, the 4th, the 5th, the 8th, the 9th and the 10th number of sub-carrier carry CSI-RS;
In Fig. 4 F, any two adjacent sub-carriers that can choose on the 14th the OFDM symbol the 3rd, the 4th, the 5th, the 8th, the 9th and the 10th number of sub-carrier carry CSI-RS.
If with synthetic several OFDM symbols of the 3rd～the 14th OFDM symbols, comprise two adjacent OFDM symbols in each OFDM symbols in advance, select one of them OFDM symbols; Can be shown in Fig. 4 G; Select the 3rd OFDM symbol and the 4th the OFDM symbols that the OFDM symbol is formed, shown in Fig. 4 H, select the 5th OFDM symbol and the 6th the OFDM symbols that the OFDM symbol is formed; Shown in Fig. 4 I; Select the 13rd OFDM symbol and the 14th the OFDM symbols that the OFDM symbol is formed, it is right that RE in the OFDM symbol of selecting, except that the RE that carries DM-RS is combined as several RE, and the subcarrier of the RE of each RE centering is identical; Select a RE to carrying CSI-RS the RE centering that is combined into, the CSI-RS Pattern of this moment can but be not limited to shown in Fig. 4 G～4I.
In Fig. 4 G, can choose any RE on the 3rd OFDM symbol and the 4th the OFDM symbol, that do not carry DM-RS to carrying CSI-RS, the subcarrier of the RE of each RE centering is identical;
In Fig. 4 H, can choose any RE on the 5th OFDM symbol and the 6th the OFDM symbol to carrying CSI-RS, the subcarrier of the RE of each RE centering is identical;
In Fig. 4 I, can choose any RE on the 13rd OFDM symbol and the 14th the OFDM symbol, that do not carry DM-RS to carrying CSI-RS, the subcarrier of the RE of each RE centering is identical.
Second kind of situation, the MBSFN subframe adopts Extended CP, and the CSI-RS port number is 2 (CSI-RS ports 0 and CSI-RS port one):
This moment CSI-RS Pattern can but be not limited to shown in Fig. 5 A～5C.
In addition, CSI-RS also can take the subcarrier that does not carry DM-RS on the 3rd, the 4th, the 11st and the 12nd the OFDM symbol.
The third situation, the MBSFN subframe adopts Normal CP, and the CSI-RS port number is 4 (CSI-RS port 0 is formed a CSI-RS port set with the CSI-RS port one, and CSI-RS port 2 is formed the 2nd CSI-RS port set with CSI-RS port 3):
If with synthetic several OFDM symbols of the 3rd～the 14th OFDM symbols, comprise 1 OFDM symbol in each OFDM symbols in advance, select one of them OFDM symbols; Can be shown in Fig. 6 A; Select the 5th OFDM symbol, shown in Fig. 6 B, select the 6th OFDM symbol; It is right that RE in the OFDM symbol of selecting is combined as several RE; The subcarrier of the RE of each RE centering is adjacent, selects two RE to carrying CSI-RS the RE centering that is combined into, the CSI-RS Pattern of this moment can but be not limited to shown in Fig. 6 A～6B.
In Fig. 6 A, can choose any two RE on the 5th the OFDM symbol to carrying CSI-RS;
In Fig. 6 B, can choose any two RE on the 6th the OFDM symbol to carrying CSI-RS.
If with synthetic several OFDM symbols of the 3rd～the 14th OFDM symbols, comprise two adjacent OFDM symbols in each OFDM symbols in advance, select one of them OFDM symbols; Can be shown in Fig. 6 C; Select the 3rd OFDM symbol and the 4th the OFDM symbols that the OFDM symbol is formed, shown in Fig. 6 D, select the 5th OFDM symbol and the 6th the OFDM symbols that the OFDM symbol is formed; Shown in Fig. 6 E; Select the 13rd OFDM symbol and the 14th the OFDM symbols that the OFDM symbol is formed, it is right that RE in the OFDM symbol of selecting, except that the RE that carries DM-RS is combined as several RE, and the subcarrier of the RE of each RE centering is identical; Select two RE to carrying CSI-RS the RE centering that is combined into, the CSI-RS Pattern of this moment can but be not limited to shown in Fig. 6 C～6D.
In Fig. 6 C, can choose any two RE on the 3rd OFDM symbol and the 4th the OFDM symbol, that do not carry DM-RS to carrying CSI-RS, the subcarrier of two RE of each RE centering is identical;
In Fig. 6 D, can choose any two RE on the 5th OFDM symbol and the 6th the OFDM symbol to carrying CSI-RS, the subcarrier of two RE of each RE centering is identical;
In Fig. 6 E, can choose any two RE on the 13rd OFDM symbol and the 14th the OFDM symbol to carrying CSI-RS, the subcarrier of two RE of each RE centering is identical.
If with synthetic several OFDM symbols of the 3rd～the 14th OFDM symbols, comprise two adjacent OFDM symbols in each OFDM symbols in advance, select one of them OFDM symbols; Can be shown in Fig. 6 F; Select the 3rd OFDM symbol and the 4th the OFDM symbols that the OFDM symbol is formed, shown in Fig. 6 G, select the 5th OFDM symbol and the 6th the OFDM symbols that the OFDM symbol is formed; Shown in Fig. 6 H; Select the 13rd OFDM symbol and the 14th the OFDM symbols that the OFDM symbol is formed, it is right that RE in the OFDM symbol of selecting, except that the RE that carries DM-RS is combined as several RE, and the OFDM symbol of the RE of each RE centering is identical; Select two RE to carrying CSI-RS the RE centering that is combined into, the CSI-RS Pattern of this moment can but be not limited to shown in Fig. 6 F～6H.
In Fig. 6 F, can choose any two RE on the 3rd OFDM symbol and the 4th the OFDM symbol, that do not carry DM-RS to carrying CSI-RS, the OFDM symbol of two RE of each RE centering is identical;
In Fig. 6 G, can choose any two RE on the 5th OFDM symbol and the 6th the OFDM symbol to carrying CSI-RS, the OFDM symbol of two RE of each RE centering is identical;
In Fig. 6 H, can choose any two RE on the 13rd OFDM symbol and the 14th the OFDM symbol, that do not carry DM-RS to carrying CSI-RS, the OFDM symbol of two RE of each RE centering is identical.
The 4th kind of situation, the MBSFN subframe adopts Extended CP, and the CSI-RS port number is 4 (CSI-RS port 0 is formed a CSI-RS port set with the CSI-RS port one, and CSI-RS port 2 is formed the 2nd CSI-RS port set with CSI-RS port 3):
This moment CSI-RS Pattern can but be not limited to shown in Fig. 7 A～7D.
In addition, CSI-RS also can take the subcarrier that does not carry DM-RS on the 3rd, the 4th, the 11st and the 12nd the OFDM symbol.
The 5th kind of situation; The MBSFN subframe adopts Normal CP; The CSI-RS port number is 8, and (CSI-RS port 0 is formed a CSI-RS port set with the CSI-RS port one; CSI-RS port 2 is formed the 2nd CSI-RS port set with CSI-RS port 3, and CSI-RS port 4 is formed the 3rd CSI-RS port set with CSI-RS port 5, and CSI-RS port 6 is formed the 4th CSI-RS port set with CSI-RS port 7):
If with synthetic several OFDM symbols of the 3rd～the 14th OFDM symbols, comprise 1 OFDM symbol in each OFDM symbols in advance, select one of them OFDM symbols; Can but be not limited to shown in Fig. 8 A; Select the 5th OFDM symbol, it is right that the RE in the OFDM symbol of selecting is combined as several RE, and the subcarrier of the RE of each RE centering is adjacent; Select four RE to carrying CSI-RS the RE centering that is combined into; The CSI-RS Pattern of this moment can but be not limited to shown in Fig. 8 A, in Fig. 8 A, can choose any four RE on the 5th the OFDM symbol to carrying CSI-RS.
If with synthetic several OFDM symbols of the 3rd～the 14th OFDM symbols, comprise two adjacent OFDM symbols in each OFDM symbols in advance, select one of them OFDM symbols; Can be shown in Fig. 8 B; Select the 3rd OFDM symbol and the 4th the OFDM symbols that the OFDM symbol is formed, shown in Fig. 8 C～Fig. 8 E, select the 5th OFDM symbol and the 6th the OFDM symbols that the OFDM symbol is formed; Shown in Fig. 8 F; Select the 13rd OFDM symbol and the 14th the OFDM symbols that the OFDM symbol is formed, it is right that RE in the OFDM symbol of selecting, except that the RE that carries DM-RS is combined as several RE, and the subcarrier of the RE of each RE centering is identical; Select four RE to carrying CSI-RS the RE centering that is combined into, the CSI-RS Pattern of this moment can but be not limited to shown in Fig. 8 B～8F.
In Fig. 8 B, can choose any four RE on the 3rd OFDM symbol and the 4th the OFDM symbol, that do not carry DM-RS to carrying CSI-RS, the subcarrier of two RE of each RE centering is identical;
In Fig. 8 C～Fig. 8 E, can choose any four RE on the 5th OFDM symbol and the 6th the OFDM symbol to carrying CSI-RS, the subcarrier of two RE of each RE centering is identical;
In Fig. 8 F, can choose any four RE on the 13rd OFDM symbol and the 14th the OFDM symbol, that do not carry DM-RS to carrying CSI-RS, the subcarrier of two RE of each RE centering is identical.
If with synthetic several OFDM symbols of the 3rd～the 14th OFDM symbols, comprise two adjacent OFDM symbols in each OFDM symbols in advance, select one of them OFDM symbols; Can be shown in Fig. 8 G; Select the 3rd OFDM symbol and the 4th the OFDM symbols that the OFDM symbol is formed, shown in Fig. 8 H～Fig. 8 I, select the 5th OFDM symbol and the 6th the OFDM symbols that the OFDM symbol is formed; Shown in Fig. 8 J; Select the 13rd OFDM symbol and the 14th the OFDM symbols that the OFDM symbol is formed, it is right that RE in the OFDM symbol of selecting, except that the RE that carries DM-RS is combined as several RE, and the OFDM symbol of the RE of each RE centering is identical; Select four RE to carrying CSI-RS the RE centering that is combined into, the CSI-RS Pattern of this moment can but be not limited to shown in Fig. 8 G～8J.
In Fig. 8 G, can choose any four RE on the 3rd OFDM symbol and the 4th the OFDM symbol, that do not carry DM-RS to carrying CSI-RS, the OFDM symbol of two RE of each RE centering is identical;
In Fig. 8 H～Fig. 8 I, can choose any four RE on the 5th OFDM symbol and the 6th the OFDM symbol to carrying CSI-RS, the OFDM symbol of two RE of each RE centering is identical;
In Fig. 8 J, can choose any four RE on the 13rd OFDM symbol and the 14th the OFDM symbol, that do not carry DM-RS to carrying CSI-RS, the OFDM symbol of two RE of each RE centering is identical.
The 6th kind of situation; The MBSFN subframe adopts Extended CP; The CSI-RS port number is 8, and (CSI-RS port 0 is formed a CSI-RS port set with the CSI-RS port one; CSI-RS port 2 is formed the 2nd CSI-RS port set with CSI-RS port 3, and CSI-RS port 4 is formed the 3rd CSI-RS port set with CSI-RS port 5, and CSI-RS port 6 is formed the 4th CSI-RS port set with CSI-RS port 7):
This moment CSI-RS Pattern can but be not limited to shown in Fig. 9 A～9D.
In addition, CSI-RS also can take the subcarrier that does not carry DM-RS in the 3rd, the 4th, the 11st and the 12nd the OFDM symbol.
Suppose that the multiplexing factor is 3, in each PRB, the RE non-overlapping copies that the CSI-RS that sends to 1～sub-district, sub-district 3 takies respectively is shown in Figure 10 A～10K, in the MBSFN subframe, sending the PRB sketch map of CSI-RS.
Suppose that the multiplexing factor is 4, in each PRB, the RE non-overlapping copies that the CSI-RS that sends to 1～sub-district, sub-district 4 takies respectively, shown in figure 11, in the MBSFN subframe that adopts Normal CP, sending the PRB sketch map of CSI-RS.
Suppose that the multiplexing factor is 5, in each PRB, the RE non-overlapping copies that the CSI-RS that sends to 1～sub-district, sub-district 5 takies respectively, shown in figure 12, in the MBSFN subframe that adopts Normal CP, sending the PRB sketch map of CSI-RS.
In order to utilize bigger power to send CSI-RS as far as possible, the embodiment of the invention proposes to make two CSI-RS port set on two frequency domains, alternately to send the OFDM character position of CSI-RS among the adjacent PRB each other.Shown in Figure 13 A～Figure 13 C, be the sketch map of the adjacent PRB of two frequency domains of transmission CSI-RS in the MBSFN subframe.
In above-mentioned Fig. 4 A～Figure 13 C, the CSI-RS port in each CSI-RS port set can exchange, and promptly each CSI-RS port can carry out combination in any.In addition; The CSI-RS Pattern that CSI-RS Pattern shown in Fig. 4 A～Figure 13 C obtains after overall offset is done in PRB inside is also within protection range of the present invention, and each RE is to squinting the CSI-RSPattern that obtains separately also within protection range of the present invention on frequency domain or the time domain.
Can know by above-mentioned processing procedure; In the embodiment of the invention technical scheme, to each sub-district, comprise at each PRB of MBSFN, among the RE except that the RE that carries PDCCH, CRS and DM-RS; Confirm to carry the RE of CSI-RS; The CSI-RS that then needs is sent to this sub-district is mapped among the RE that determines, and this MBSFN subframe is sent to the user terminal in each sub-district, thereby has realized in the MBSFN subframe, sending the scheme of CSI-RS; Owing to carry CSI-RS based on the RE except that the RE that carries PDCCH, CRS and DM-RS, therefore just avoided PDCCH, CRS and DM-RS that CSI-RS is produced and disturbed.
Accordingly, the embodiment of the invention provides a kind of channel state information reference signals dispensing device, and is shown in figure 14, comprise confirming unit 141, map unit 142 and transmitting element 143, wherein:
Confirm unit 141, be used for to each sub-district, comprise at each PRB of MBSFN subframe, remove among the RE the RE that carries PDCCH, CRS and DM-RS, confirm the RE of carrying CSI-RS;
Map unit 142 is used for the CSI-RS that needs send to this sub-district is mapped to the RE that confirms that unit 141 is determined;
Transmitting element 143 is used for the MBSFN subframe after map unit 142 mapping is sent to the user terminal of each sub-district.
Preferably, confirm that unit 141 specifically comprises division subelement and definite subelement, wherein:
Divide subelement, be used for the CSI-RS port that sends CSI-RS is divided at least one CSI-RS port set, the quantity of the CSI-RS port that comprises in each CSI-RS port set is 2;
Confirm subelement; Be used for to each CSI-RS port; Comprise at each PRB of MBSFN subframe, among the RE except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, wherein; The RE that is determined to each the CSI-RS port in the same CSI-RS port set is identical, and the RE that is determined to the CSI-RS port in the different CSI-RS port set is different.
More preferably, confirm that subelement comprises that specifically first selects module, composite module, second to select module and determination module, wherein:
First selects module, is used for to each CSI-RS port, in the OFDM symbol the OFDM symbol that comprises at each PRB of MBSFN subframe, remove carrying PDCCH and CRS, selects 1 or 2 OFDM symbols;
Composite module, be used for first select module to select OFDM symbol RE that comprised, that remove carrying DM-RS RE, it is right that per two RE on the same sub-carrier or the adjacent RE of per two number of sub-carrier on the identical OFDM symbol are combined as a RE;
Second selects module, is used for selecting at least one RE right the RE centering that is combined into;
Determination module is used for each RE of selecting each RE centering that module selects with second, confirms as the RE that carries CSI-RS.
More preferably, transmitting element 143 specifically comprises distribution subelement and transmission subelement, wherein:
Distribute subelement, each the CSI-RS port that is used in each CSI-RS port set distributes an OCC respectively, and the length of the OCC that wherein distributes is 2;
Send subelement, be used for each CSI-RS port,, the CSI-RS that each RE carried of each RE centering is sent to the user terminal in each sub-district respectively according to the OCC that distributes subelement to distribute to each CSI-RS port set.
Preferably, two RE of each RE centering of being combined into of composite module are the adjacent RE of two number of sub-carrier on the identical OFDM symbol;
To each the CSI-RS port in any CSI-RS port set, the RE that the second selection module is selected in two adjacent PRB of frequency domain respectively is different to pairing OFDM symbol.
Preferably, second select RE that module selects respectively to the neighbor cell of defined amount to non-overlapping copies.
The embodiment of the invention also provides a kind of base station, comprises above-mentioned channel state information reference signals dispensing device, wherein the channel state information reference signals dispensing device can but be not limited to place the base station.
Corresponding with above-mentioned channel state information reference signals sending method, the embodiment of the invention has also proposed a kind of channel state information reference signals method of reseptance, and is shown in figure 15, and its concrete processing procedure is following:
Step 152 receives CSI-RS from the RE that determines.
Wherein, comprise at this PRB, among the RE except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, specifically comprise the steps:
The CSI-RS port that at first will send CSI-RS is divided at least one CSI-RS port set; The quantity of the CSI-RS port that comprises in each CSI-RS port set is 2; Then to each CSI-RS port; In this PRB of this CSI-RS port transmission RE that comprise, except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, wherein; The RE that is determined to each the CSI-RS port in the same CSI-RS port set is identical, and the RE that is determined to the CSI-RS port in the different CSI-RS port set is different.
In said process,, specifically comprise the steps: to the definite RE that carries CSI-RS of each CSI-RS port
To each CSI-RS port; Comprise at this PRB, select 1 or 2 OFDM symbols in the OFDM symbol except that the OFDM symbol that carries PDCCH and CRS; In the OFDM symbol of selection RE that comprised, except that the RE that carries DM-RS; It is right that per two RE on the same sub-carrier or the adjacent RE of per two number of sub-carrier on the identical OFDM symbol are combined as a RE, the RE centering that is combined into, selects at least one RE right; With each RE of each RE centering of selecting, confirm as the RE that carries CSI-RS.
From the RE that determines, receive CSI-RS, specifically comprise the steps:
Confirm as the OCC that each the CSI-RS port in each CSI-RS port set distributes respectively; The length of the OCC that wherein distributes is 2; To each the CSI-RS port in each CSI-RS port set, according to the OCC that determines, from each right RE of each RE, receive CSI-RS respectively then.
In the embodiment of the invention; Two RE of each the RE centering that is combined into are the adjacent RE of two number of sub-carrier on the identical OFDM symbol; At this moment, to each the CSI-RS port in any CSI-RS port set, the RE that in two adjacent PRB of frequency domain, selects respectively is different to pairing OFDM symbol.
In addition, the RE that selects respectively to the neighbor cell of defined amount is to non-overlapping copies.
The embodiment of the invention provides a kind of channel state information reference signals receiving system, and is shown in figure 16, comprise confirming unit 161 and receiving element 162, wherein:
Receiving element 162 is used for from confirming that the RE that unit 161 is determined receives CSI-RS.
Preferably, confirm that unit 161 comprises that specifically dividing subelement and first confirms subelement, wherein:
Divide subelement, be used for the CSI-RS port that sends CSI-RS is divided at least one CSI-RS port set, the quantity of the CSI-RS port that comprises in each CSI-RS port set is 2;
First confirms subelement; Be used for to each CSI-RS port; In this PRB of this CSI-RS port transmission RE that comprise, except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, wherein; The RE that is determined to each the CSI-RS port in the same CSI-RS port set is identical, and the RE that is determined to the CSI-RS port in the different CSI-RS port set is different.
More preferably, first confirms that subelement comprises that specifically first selects module, composite module, second to select module and determination module:
First selects module, is used for to each CSI-RS port, comprise at this PRB, remove selection 1 or 2 OFDM symbols in the OFDM symbol the OFDM symbol that carries PDCCH and CRS;
Composite module, be used for first select module to select OFDM symbol RE that comprised, that remove carrying DM-RS RE, it is right that per two RE on the same sub-carrier or the adjacent RE of per two number of sub-carrier on the identical OFDM symbol are combined as a RE;
Second selects module, is used for the RE centering that is combined at composite module, selects at least one RE right;
Determination module is used for each RE of selecting each RE centering that module selects with second, confirms as the RE that carries CSI-RS.
More preferably, receiving element 162 comprises that specifically second confirms subelement and receive subelement, wherein:
Second confirms subelement, is used for confirming as the OCC that each CSI-RS port of each CSI-RS port set distributes respectively, and the length of the OCC that wherein distributes is 2;
Receive subelement, be used for each CSI-RS port, confirm the OCC that subelement is determined according to second respectively, from each right RE of each RE, receive CSI-RS to each CSI-RS port set.
Preferably, two RE of each RE centering of being combined into of composite module are the adjacent RE of two number of sub-carrier on the identical OFDM symbol;
To each the CSI-RS port in any CSI-RS port set, the RE that the second selection module is selected in two adjacent PRB of frequency domain respectively is different to pairing OFDM symbol.
Preferably, second select RE that module selects respectively to the neighbor cell of defined amount to non-overlapping copies.
The embodiment of the invention also provides a kind of user terminal, comprises above-mentioned channel state information reference signals receiving system, wherein the channel state information reference signals receiving system can but be not limited to place user terminal.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (30)
1. a channel state information reference signals sending method is characterized in that, comprising:
To each sub-district; Comprise at each Physical Resource Block PRB of multimedia broadcasting SFN MBSFN subframe respectively, among the RE except that the Resource Unit RE that carries physical downlink control channel PDCCH, public reference signal CRS and demodulated reference signal DM-RS, confirm the RE of Bearer Channel state information reference signals CSI-RS;
The CSI-RS that needs is sent to this sub-district is mapped among the RE that determines;
Said MBSFN subframe is sent to the user terminal in each sub-district.
2. channel state information reference signals sending method as claimed in claim 1 is characterized in that, comprise at each PRB of MBSFN subframe, among the RE except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, specifically comprise:
The CSI-RS port that sends CSI-RS is divided at least one CSI-RS port set, and the quantity of the CSI-RS port that comprises in each CSI-RS port set is 2;
To each CSI-RS port; Comprise at each PRB of MBSFN subframe, among the RE except that the RE that carries PDCCH, CRS and DM-RS; Confirm to carry the RE of CSI-RS; Wherein, the RE that is determined to each the CSI-RS port in the same CSI-RS port set is identical, and the RE that is determined to the CSI-RS port in the different CSI-RS port set is different.
3. channel state information reference signals sending method as claimed in claim 2 is characterized in that, to each CSI-RS port, confirms to carry the RE of CSI-RS, specifically comprises:
To each CSI-RS port, carry out respectively:
Comprise at each PRB of MBSFN subframe, select 1 or 2 OFDM symbols in the OFDM symbol except that the orthogonal frequency division multiplex OFDM symbol that carries PDCCH and CRS;
Among the RE the RE that is comprised at the OFDM symbol of selecting, remove carrying DM-RS, it is right that per two RE on the same sub-carrier or the adjacent RE of per two number of sub-carrier on the identical OFDM symbol are combined as a RE;
The RE centering that is combined into, select at least one RE right;
With each RE of each RE centering of selecting, confirm as the RE that carries CSI-RS.
4. channel state information reference signals sending method as claimed in claim 3 is characterized in that, said MBSFN subframe is sent to the user terminal in each sub-district, specifically comprises:
For each the CSI-RS port in each CSI-RS port set distributes an orthogonal intersection OCC respectively, the length of the OCC that wherein distributes is 2;
To each the CSI-RS port in each CSI-RS port set, according to the OCC that distributes, the CSI-RS that RE carried with each RE centering sends to the user terminal in each sub-district respectively.
5. channel state information reference signals sending method as claimed in claim 3 is characterized in that, two RE of each the RE centering that is combined into are the adjacent RE of two number of sub-carrier on the identical OFDM symbol;
To each the CSI-RS port in any CSI-RS port set, the RE that in two adjacent PRB of frequency domain, selects respectively is different to pairing OFDM symbol.
6. channel state information reference signals sending method as claimed in claim 3 is characterized in that, the RE that selects respectively to the neighbor cell of defined amount is to non-overlapping copies.
7. channel state information reference signals sending method as claimed in claim 3 is characterized in that, said MBSFN subframe adopts regular circulation prefix Normal CP;
The RE that carries DM-RS among each PRB of MBSFN subframe is: several RE on be arranged in order by the order after arriving first according to the time the 3rd, the 4th, the 13rd and the 14th the OFDM symbol.
8. channel state information reference signals sending method as claimed in claim 7 is characterized in that, the RE that selects respectively to each CSI-RS port is to being:
Any RE on the 3rd, the 4th, the 5th, the 6th, the 11st, the 12nd, the 13rd and the 14th the OFDM symbol is right, and two RE of this RE centering are two adjacent RE of subcarrier on the OFDM symbol is adjacent on the same sub-carrier two RE or the identical OFDM symbol.
9. channel state information reference signals sending method as claimed in claim 3 is characterized in that, said MBSFN subframe adopts extended cyclic prefix Extended CP;
The RE that carries DM-RS among each PRB of MBSFN subframe is: several RE on be arranged in order by the order after arriving first according to the time the 3rd, the 4th, the 11st and the 12nd the OFDM symbol.
10. channel state information reference signals sending method as claimed in claim 9 is characterized in that, the RE that selects respectively to each CSI-RS port is to being:
Any RE on the 3rd, the 4th, the 5th, the 6th, the 9th, the 10th, the 11st and the 12nd the OFDM symbol is right, and two RE of this RE centering are two adjacent RE of subcarrier on the OFDM symbol is adjacent on the same sub-carrier two RE or the identical OFDM symbol.
11. a channel state information reference signals dispensing device is characterized in that, comprising:
Confirm the unit; Be used for to each sub-district; Comprise at each Physical Resource Block PRB of multimedia broadcasting SFN MBSFN subframe, among the RE except that the Resource Unit RE that carries physical downlink control channel PDCCH, public reference signal CRS and demodulated reference signal DM-RS, confirm the RE of Bearer Channel state information reference signals CSI-RS;
Map unit is used for the CSI-RS that needs send to this sub-district is mapped to the RE that confirms that the unit is determined;
Transmitting element is used for the MBSFN subframe after the map unit mapping is sent to the user terminal of each sub-district.
12. channel state information reference signals dispensing device as claimed in claim 11 is characterized in that, confirms that the unit specifically comprises:
Divide subelement, be used for the CSI-RS port that sends CSI-RS is divided at least one CSI-RS port set, the quantity of the CSI-RS port that comprises in each CSI-RS port set is 2;
Confirm subelement; Be used for to each CSI-RS port; Comprise at each PRB of MBSFN subframe, among the RE except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, wherein; The RE that is determined to each the CSI-RS port in the same CSI-RS port set is identical, and the RE that is determined to the CSI-RS port in the different CSI-RS port set is different.
13. channel state information reference signals dispensing device as claimed in claim 12 is characterized in that, confirms that subelement specifically comprises:
First selects module, is used for to each CSI-RS port, in the OFDM symbol the orthogonal frequency division multiplex OFDM symbol that comprises at each PRB of MBSFN subframe, remove carrying PDCCH and CRS, selects 1 or 2 OFDM symbols;
Composite module, be used for first select module to select OFDM symbol RE that comprised, that remove carrying DM-RS RE, it is right that per two RE on the same sub-carrier or the adjacent RE of per two number of sub-carrier on the identical OFDM symbol are combined as a RE;
Second selects module, is used for selecting at least one RE right the RE centering that is combined into;
Determination module is used for each RE of selecting each RE centering that module selects with second, confirms as the RE that carries CSI-RS.
14. channel state information reference signals dispensing device as claimed in claim 13 is characterized in that transmitting element specifically comprises:
Distribute subelement, each the CSI-RS port that is used in each CSI-RS port set distributes an orthogonal intersection OCC respectively, and the length of the OCC that wherein distributes is 2;
Send subelement, be used for each CSI-RS port,, the CSI-RS that each RE carried of each RE centering is sent to the user terminal in each sub-district respectively according to the OCC that distributes subelement to distribute to each CSI-RS port set.
15. channel state information reference signals dispensing device as claimed in claim 13 is characterized in that, two RE of each RE centering that composite module is combined into are the adjacent RE of two number of sub-carrier on the identical OFDM symbol;
To each the CSI-RS port in any CSI-RS port set, the RE that the second selection module is selected in two adjacent PRB of frequency domain respectively is different to pairing OFDM symbol.
16. channel state information reference signals dispensing device as claimed in claim 13 is characterized in that, second selects RE that module selects respectively to the neighbor cell of defined amount to non-overlapping copies.
17. a base station is characterized in that, comprises the described channel state information reference signals dispensing device of the arbitrary claim of claim 11～16.
18. a channel state information reference signals method of reseptance is characterized in that, comprising:
Among each Physical Resource Block PRB that the multimedia broadcasting SFN MBSFN subframe that user terminal sends in the base station is comprised; Respectively to self sub-district, place; Comprise at this PRB, among the RE except that the Resource Unit RE that carries physical downlink control channel PDCCH, public reference signal CRS and demodulated reference signal DM-RS, confirm the RE of Bearer Channel state information reference signals CSI-RS;
From the RE that determines, receive CSI-RS.
19. channel state information reference signals method of reseptance as claimed in claim 18 is characterized in that, comprise at this PRB, among the RE except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, specifically comprise:
The CSI-RS port that sends CSI-RS is divided at least one CSI-RS port set, and the quantity of the CSI-RS port that comprises in each CSI-RS port set is 2;
To each CSI-RS port; In this PRB of this CSI-RS port transmission RE that comprise, except that the RE that carries PDCCH, CRS and DM-RS; Confirm to carry the RE of CSI-RS; Wherein, the RE that is determined to each the CSI-RS port in the same CSI-RS port set is identical, and the RE that is determined to the CSI-RS port in the different CSI-RS port set is different.
20. channel state information reference signals method of reseptance as claimed in claim 19; It is characterized in that; To each CSI-RS port; In this PRB of this CSI-RS port transmission RE that comprise, except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, specifically comprise:
To each CSI-RS port, carry out respectively:
Comprise at this PRB, in the OFDM symbol except that the orthogonal frequency division multiplex OFDM symbol that carries PDCCH and CRS, select 1 or 2 OFDM symbols;
Among the RE the RE that is comprised at the OFDM symbol of selecting, remove carrying DM-RS, it is right that per two RE on the same sub-carrier or the adjacent RE of per two number of sub-carrier on the identical OFDM symbol are combined as a RE;
The RE centering that is combined into, select at least one RE right;
With each RE of each RE centering of selecting, confirm as the RE that carries CSI-RS.
21. channel state information reference signals method of reseptance as claimed in claim 20 is characterized in that, from the RE that determines, receives CSI-RS, specifically comprises:
Confirm as the orthogonal intersection OCC that each the CSI-RS port in each CSI-RS port set distributes respectively, the length of the OCC that wherein distributes is 2;
To each the CSI-RS port in each CSI-RS port set, according to the OCC that determines, from each right RE of each RE, receive CSI-RS respectively.
22. channel state information reference signals method of reseptance as claimed in claim 20 is characterized in that, two RE of each the RE centering that is combined into are the adjacent RE of two number of sub-carrier on the identical OFDM symbol;
To each the CSI-RS port in any CSI-RS port set, the RE that in two adjacent PRB of frequency domain, selects respectively is different to pairing OFDM symbol.
23. channel state information reference signals method of reseptance as claimed in claim 20 is characterized in that, the RE that selects respectively to the neighbor cell of defined amount is to non-overlapping copies.
24. a channel state information reference signals receiving system is characterized in that, comprising:
Confirm the unit; Each Physical Resource Block PRB that the multimedia broadcasting SFN MBSFN subframe that is used for sending in the base station is comprised; Respectively to the sub-district, place; Comprise at this PRB, among the RE except that the Resource Unit RE that carries physical downlink control channel PDCCH, public reference signal CRS and demodulated reference signal DM-RS, confirm the RE of Bearer Channel state information reference signals CSI-RS;
Receiving element is used for from confirming that the RE that the unit is determined receives CSI-RS.
25. channel state information reference signals receiving system as claimed in claim 24 is characterized in that, confirms that the unit specifically comprises:
Divide subelement, be used for the CSI-RS port that sends CSI-RS is divided at least one CSI-RS port set, the quantity of the CSI-RS port that comprises in each CSI-RS port set is 2;
First confirms subelement; Be used for to each CSI-RS port; In this PRB of this CSI-RS port transmission RE that comprise, except that the RE that carries PDCCH, CRS and DM-RS, confirm to carry the RE of CSI-RS, wherein; The RE that is determined to each the CSI-RS port in the same CSI-RS port set is identical, and the RE that is determined to the CSI-RS port in the different CSI-RS port set is different.
26. channel state information reference signals receiving system as claimed in claim 25 is characterized in that, first confirms that subelement specifically comprises:
First selects module, is used for to each CSI-RS port, comprise at this PRB, remove selection 1 or 2 OFDM symbols in the OFDM symbol the orthogonal frequency division multiplex OFDM symbol that carries PDCCH and CRS;
Composite module, be used for first select module to select OFDM symbol RE that comprised, that remove carrying DM-RS RE, it is right that per two RE on the same sub-carrier or the adjacent RE of per two number of sub-carrier on the identical OFDM symbol are combined as a RE;
Second selects module, is used for the RE centering that is combined at composite module, selects at least one RE right;
Determination module is used for each RE of selecting each RE centering that module selects with second, confirms as the RE that carries CSI-RS.
27. channel state information reference signals receiving system as claimed in claim 26 is characterized in that receiving element specifically comprises:
Second confirms subelement, is used for confirming as the orthogonal intersection OCC that each CSI-RS port of each CSI-RS port set distributes respectively, and the length of the OCC that wherein distributes is 2;
Receive subelement, be used for each CSI-RS port, confirm the OCC that subelement is determined according to second respectively, from each right RE of each RE, receive CSI-RS to each CSI-RS port set.
28. channel state information reference signals receiving system as claimed in claim 26 is characterized in that, two RE of each RE centering that composite module is combined into are the adjacent RE of two number of sub-carrier on the identical OFDM symbol;
To each the CSI-RS port in any CSI-RS port set, the RE that the second selection module is selected in two adjacent PRB of frequency domain respectively is different to pairing OFDM symbol.
29. channel state information reference signals receiving system as claimed in claim 26 is characterized in that, second selects RE that module selects respectively to the neighbor cell of defined amount to non-overlapping copies.
30. a user terminal is characterized in that, comprises the described channel state information reference signals receiving system of the arbitrary claim of claim 24～29.
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