CN102244557A - Method and device for transmitting and receiving channel sounding reference signals - Google Patents

Method and device for transmitting and receiving channel sounding reference signals Download PDF

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Publication number
CN102244557A
CN102244557A CN2010101753289A CN201010175328A CN102244557A CN 102244557 A CN102244557 A CN 102244557A CN 2010101753289 A CN2010101753289 A CN 2010101753289A CN 201010175328 A CN201010175328 A CN 201010175328A CN 102244557 A CN102244557 A CN 102244557A
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reference signal
sounding reference
channel sounding
precoding matrix
srs
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CN102244557B (en
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史志华
刘建军
王启星
刘光毅
陈奎林
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China Mobile Communications Group Co Ltd
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China Mobile Communications Group Co Ltd
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Priority to CN201010175328.9A priority Critical patent/CN102244557B/en
Priority to PCT/CN2011/073053 priority patent/WO2011131127A1/en
Priority to US13/641,884 priority patent/US8917687B2/en
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Abstract

本发明公开了一种发送与接收信道探测参考信号的方法及装置，用以在降低发送SRS所需时频码资源的同时，帮助通信系统实现性能较好的上行与下行传输。方法包括：用户终端确定用于对帮助上行传输的信道探测参考信号进行编码的第一预编码矩阵和用于对帮助下行传输的信道探测参考信号进行编码的第二预编码矩阵；并利用第一预编码矩阵、第二预编码矩阵，分别对信道探测参考信号编码得到第一信道探测参考信号、第二信道探测参考信号；以及向基站发送第一信道探测参考信号和第二信道探测参考信号。

The invention discloses a method and device for sending and receiving channel sounding reference signals, which are used to help a communication system realize better performance of uplink and downlink transmission while reducing time-frequency code resources required for sending SRS. The method includes: the user terminal determines a first precoding matrix used to encode a channel sounding reference signal that assists uplink transmission and a second precoding matrix that is used to encode a channel sounding reference signal that assists downlink transmission; and uses the first The precoding matrix and the second precoding matrix respectively encode the channel sounding reference signal to obtain the first channel sounding reference signal and the second channel sounding reference signal; and send the first channel sounding reference signal and the second channel sounding reference signal to the base station.

Description

Send method and device with the receive channel detection reference signal
Technical field
The present invention relates to communication technical field, relate in particular to the method and the device of a kind of transmission and receive channel detection reference signal.
Background technology
At Long Term Evolution (LTE, Long Term Evolution) in the system, in order to realize up frequency domain dispatching, user terminal (UE, User Equipment) except will in the data transfer bandwidth of this UE self, sending demodulated reference signal, also need be in than the bigger broadband of this data transfer bandwidth transmitting channel detection reference signal (SRS, Sounding Reference Signal) so that channel is surveyed, thereby realize helping the base station that UE is carried out the purpose that uplink transmission resource is distributed.
In the LTE-A of follow-up evolution system, UE can adopt many transmit antennas (typical number of transmit antennas be 1,2 and 4 etc.) to send SRS, but this just needs the more SRS time-frequency code of system configuration resource to carry out the SRS transmission.And, in LTE-A, the uplink transmission resource of UE is distributed the method for salary distribution of supporting based on string (cluster), according to the method for salary distribution based on cluster, ascending resource might be distributed on the subband far away of being separated by, therefore in order to support the user to dispatch and up precoding (precoding), UE need send SRS so that channel is surveyed under bigger bandwidth, thereby can further strengthen demand to SRS time-frequency code resource, and increase can directly cause up expense (overhead) significantly to increase to SRS time-frequency code demand, reduces the uplink spectrum efficiency.
At present existing program is proposed to adopt SRS transmission means based on precoding to be reduced in and is sent the demand of SRS to the time-frequency code resource on the bigger bandwidth, promptly, utilize the pre-coding matrix of configuration that SRS is carried out sending after the encoding process more earlier at uplink multi-users scheduling allocating pre-coding matrix.Yet, the same pre-coding matrix of employing that provides in the employing prior art is encoded to the SRS that helps uplink, downlink transfer and transmit the scheme of channel response value being estimated to realize on channel, can't help communication system to realize the up and downlink transfer of better performances simultaneously.
Summary of the invention
The invention provides the method and the device of a kind of transmission and receive channel detection reference signal,, help the up and downlink transfer of communication system realization better performances in order to when reducing the required time-frequency code resource of transmission SRS.
The present invention is by the following technical solutions:
A kind of method of transmitting channel detection reference signal comprises:
Second pre-coding matrix that user terminal is identified for first pre-coding matrix that the Sounding Reference Signal that helps uplink is encoded and is used for the Sounding Reference Signal that helps downlink transfer is encoded; And utilize first pre-coding matrix, second pre-coding matrix, Sounding Reference Signal is encoded obtain first Sounding Reference Signal, second channel detection reference signal respectively; And send first Sounding Reference Signal and second channel detection reference signal to the base station.
Preferably, determine that first precoding and second pre-coding matrix specifically comprise: user terminal sends the 3rd Sounding Reference Signal to the base station; And receive the first pre-coding matrix information of determining and sending according to the 3rd Sounding Reference Signal by the base station, determine first pre-coding matrix according to the first pre-coding matrix information; And, determine second pre-coding matrix according to the down channel detection reference signal that the base station sends.
Preferably, determine that first pre-coding matrix and second pre-coding matrix specifically comprise: user terminal sends the 3rd Sounding Reference Signal to the base station; And receive the first pre-coding matrix information and the second pre-coding matrix information of determining and sending according to the 3rd Sounding Reference Signal by the base station; According to the first pre-coding matrix information and the second pre-coding matrix information, determine first pre-coding matrix and second pre-coding matrix respectively.
A kind of method of receive channel detection reference signal comprises:
The base station receives first Sounding Reference Signal and the second channel detection reference signal that user terminal sends, wherein, first Sounding Reference Signal is used for pre-coding matrix that the Sounding Reference Signal that helps uplink is encoded for the user terminal utilization, Sounding Reference Signal encoded obtain, second pre-coding matrix is used for pre-coding matrix that the Sounding Reference Signal that helps downlink transfer is encoded for the user terminal utilization, and Sounding Reference Signal is encoded to be obtained.
A kind of device of transmitting channel detection reference signal comprises:
The pre-coding matrix determining unit is used to second pre-coding matrix that is identified for first pre-coding matrix that the Sounding Reference Signal that helps uplink is encoded and is used for the Sounding Reference Signal that helps downlink transfer is encoded; Coding unit, first pre-coding matrix, second pre-coding matrix that are used to utilize the pre-coding matrix determining unit to determine are encoded to Sounding Reference Signal respectively and are obtained first Sounding Reference Signal, second channel detection reference signal; Transmitting element is used for sending first Sounding Reference Signal and the second channel detection reference signal that coding unit obtains to the base station.
A kind of device of receive channel detection reference signal comprises:
First receiving element, be used to receive first Sounding Reference Signal that user terminal sends, wherein, first Sounding Reference Signal is used for pre-coding matrix that the Sounding Reference Signal that helps uplink is encoded for the user terminal utilization, and Sounding Reference Signal is encoded to be obtained; Second receiving element, be used to receive the second channel detection reference signal that user terminal sends, wherein, the second channel detection reference signal is used for pre-coding matrix that the Sounding Reference Signal that helps downlink transfer is encoded for the user terminal utilization, and Sounding Reference Signal is encoded to be obtained.
Beneficial effect of the present invention is as follows: the scheme that the embodiment of the invention provides is by being definite first pre-coding matrix that helps the Sounding Reference Signal of uplink, and be definite second pre-coding matrix that helps the Sounding Reference Signal of downlink transfer, utilize first pre-coding matrix, second pre-coding matrix, respectively Sounding Reference Signal is encoded and obtain first Sounding Reference Signal, behind the second channel detection reference signal, send out first Sounding Reference Signal and second channel detection reference signal to the base station, thereby can realize respectively at SRS that helps uplink and the SRS allocating pre-coding matrix that helps downlink transfer, therefore when reducing the required time-frequency code resource of transmission SRS, the scheme that provides in the prior art has been provided adopts same pre-coding matrix to helping uplink, the SRS of downlink transfer encodes and transmits on channel with realization channel response value is estimated, can't help communication system to realize the problem of the up and downlink transfer of better performances simultaneously.
Description of drawings
The idiographic flow schematic diagram of the method for a kind of SRS of transmission that Fig. 1 provides for the embodiment of the invention;
Fig. 2 is the schematic diagram that sends a kind of situation of first, second, third SRS in the embodiment of the invention;
The concrete structure schematic diagram of the device of a kind of SRS of transmission that Fig. 3 provides for the embodiment of the invention;
The concrete structure schematic diagram of the device of a kind of SRS of reception that Fig. 4 provides for the embodiment of the invention.
Embodiment
A considerable advantage according to the LTE-TDD system---channel reciprocity, SRS not only can be with helping uplink, and the while also can be with helping downlink transfer.Yet in the prior art, general only be at the SRS allocating pre-coding matrix that helps uplink, and is not to be suitable for the SRS of help downlink transfer is encoded at the SRS allocating pre-coding matrix that helps uplink.Therefore, come the SRS that helps downlink transfer is encoded, then can make the base station not accurate enough according to the resulting channel response estimated value of SRS that helps downlink transfer if be adopted as the pre-coding matrix of the SRS configuration that helps uplink.As seen, adopt the scheme of prior art, can't help communication system to realize the up and downlink transfer of better performances simultaneously.And in transmission that the embodiment of the invention provides and the scheme that receives SRS, by being respectively the SRS allocating pre-coding matrix that helps uplink, simultaneously for helping the other pre-coding matrix of SRS configuration of downlink transfer, make that need not a shared identical pre-coding matrix encodes to SRS that helps uplink and the SRS that helps downlink transfer again, but can utilize mutually different pre-coding matrix respectively SRS that helps uplink and the SRS that helps downlink transfer to be encoded respectively, thereby be implemented in when reduce sending the required time-frequency code resource of SRS, help communication system to realize the up and downlink transfer of better performances.
At first, the embodiment of the invention provides the method for a kind of SRS of transmission, and the idiographic flow schematic diagram of this method may further comprise the steps as shown in Figure 1:
Second pre-coding matrix that step 11, user terminal are identified for first pre-coding matrix that the SRS that helps uplink is encoded and are used for the SRS that helps downlink transfer is encoded;
Step 12 is utilized first pre-coding matrix, second pre-coding matrix, and SRS is encoded obtains a SRS, the 2nd SRS respectively;
Step 13, send a SRS and the 2nd SRS to the base station, such as, can with first bandwidth that is used to send the SRS that helps uplink of base station agreement, send a SRS to the base station, and with second bandwidth that is used to send the SRS that helps downlink transfer of base station agreement, send the 2nd SRS to the base station, perhaps also can adopt the mode of time division multiplexing or frequency division multiplexing or code division multiplexing to send a SRS and the 2nd SRS that above-mentioned coding obtains to the base station by user terminal.
Provide such scheme as can be known according to the embodiment of the invention, help SRS up, downlink transfer to dispose pre-coding matrix respectively owing to be respectively, thereby when the SRS that helps downlink transfer is carried out precoding, need not to utilize again only pre-coding matrix SRS up to helping, downlink transfer to carry out encoding process.Thereby the scheme that adopts the embodiment of the invention to provide can help communication system to realize the up and downlink transfer of better performances utilizing pre-coding matrix SRS to be encoded with when reducing the required time-frequency code resource of transmission SRS.
At above-mentioned steps 11, in embodiments of the present invention, can adopt multiple mode to determine first pre-coding matrix and second pre-coding matrix, such as, user terminal can be by sending the mode of SRS to the base station, first pre-coding matrix and second pre-coding matrix are determined in the cause base station.Particularly, user terminal can send Three S's RS to the base station, and receive the first pre-coding matrix information and the second pre-coding matrix information of determining and sending according to Three S's RS by the base station, thereby can be according to the first pre-coding matrix information and the second pre-coding matrix information, determine first pre-coding matrix and second pre-coding matrix respectively, in general the Three S's RS here can be Non-precoded SRS for not carrying out the SRS of precoding processing.In addition, the first pre-coding matrix information here can comprise that the information etc. of the order of first pre-coding matrix can be used for determining the information of first pre-coding matrix; Similarly, the second pre-coding matrix information can also comprise the information etc. of the order of second pre-coding matrix.Perhaps, user terminal also can only be used for determining first pre-coding matrix to the mode that the base station sends SRS, second pre-coding matrix then can adopt the base station to determine the mode of first pre-coding matrix according to SRS, by the descending SRS of user terminal self according to the base station transmission, really fix then according to the second predetermined pre-coding matrix and to determine, such as, in order to determine first, second pre-coding matrix, user terminal can send Three S's RS to the base station, and receive the first pre-coding matrix information that the base station is determined and sent according to Three S's RS, simultaneously, receive the descending SRS that send the base station; Thereby user terminal just can be determined first pre-coding matrix according to the first pre-coding matrix information that receives, and determines second pre-coding matrix according to the descending SRS that receives.In addition, user terminal can also be determined first pre-coding matrix and second pre-coding matrix according to the descending SRS that the base station sends.
In embodiments of the present invention, the average transmission of Three S's RS at interval can be greater than the average transmission interval of a SRS, while is greater than the average transmission interval of the 2nd SRS, to guarantee that the Three S's RS that sends can not take too many system resource, simultaneously, sending the used bandwidth of Three S's RS can comprise the first used bandwidth of transmission the one SRS and send the second used bandwidth of the 2nd SRS.Particularly, on the 3rd bandwidth, send Three S's RS at interval, and the schematic diagram of first and second SRS of transmission can be with reference to accompanying drawing 2 on first bandwidth and second bandwidth respectively at interval with less average transmission with average greatly transmission.In the accompanying drawing 2 described transmission situations, the one SRS is to be filled with the rectangular expression of oblique line, the 2nd SRS is the rectangular expression of white with the fill color, Three S's RS then is the rectangular expression of black with the fill color, in Fig. 2, first, second, Three S's RS is periodically transmission, perhaps, first, second, also can have only a SRS periodically to send among the Three S's RS, and other SRS send to the base station after notifying the message that sends SRS by user terminal in being used to of receiving that the base station sends, perhaps, first, second, can have two SRS periodically to send among the Three S's RS, and another SRS send after receiving above-mentioned message by user terminal to the base station.
In embodiments of the present invention, the bandwidth that sends Three S's RS can also be split as two independently bandwidth, such as, can be split as wide and the 5th bandwidth of the four-tape, user terminal can be in the four-tape sends Three S's RS respectively on wide and the 5th bandwidth, wherein, the four-tape sends the first used bandwidth of a SRS wide can comprising, the 5th bandwidth then can comprise the second used bandwidth of transmission the 2nd SRS, need to prove, the process that sends Three S's RS respectively in the four-tape on wide and the 5th bandwidth can be separate, is independent of each other.
Send in the process of Three S's RS respectively on wide and the 5th bandwidth in the above-mentioned four-tape, overlap with the process of the 2nd SRS with transmission the one SRS if find, then can overlap the time engrave the transmission of the SRS that time-out obtains precoding, such as, can determine to send simultaneously first moment of a SRS and Three S's RS earlier, and determine to send simultaneously second moment of the 2nd SRS and Three S's RS; When then on first bandwidth, sending a SRS, first transmission that suspends constantly a SRS that can determine, only Three S's RS is sent and engraved at this first o'clock, and when on second bandwidth, sending the 2nd SRS, second transmission that suspends constantly the 2nd SRS that can determine.Except SRS being suspended the mode that sends, in the embodiment of the invention, user terminal can also adopt the mode of time division multiplexing or frequency division multiplexing or code division multiplexing to send a SRS, Three S's RS to the base station on first bandwidth; Or on second bandwidth, adopt the mode of time division multiplexing or frequency division multiplexing or code division multiplexing to send the 2nd SRS, Three S's RS to the base station.
Below with the embodiment of the invention provide such scheme in practice be applied as example, utilize a plurality of embodiment to describe the concrete application process of this scheme in detail: the basic thought of these embodiment is: the process of transmitting of SRS is made up of three subprocess, be respectively subprocess one, subprocess two and subprocess three, wherein, the SRS that sends in the subprocess one is used to assist multi-subscriber dispatching, and helps to determine the SRS pre-coding matrix required in other two subprocess or the order number of pre-coding matrix etc.; Send the up Adaptive Transmission that SRS is used for help system in the subprocess two, required pre-coding matrix etc. when for example being used for determining up Adaptive Transmission; The SRS that sends in the subprocess three is used for the descending self-adapting transmission of help system, for example determine precoding/wave beam forming matrix required when descending self-adapting transmits etc., reduce the purpose that sends the required time-frequency code resource of SRS in order to reach, the SRS that sends in the subprocess two, three passes through corresponding precoding processing before transmission.More than the work that cooperatively interacts of three subprocess, finish whole SRS transfer function based on precoding.Need to prove, in the embodiment of the invention, also can by UE self determine subprocess two, three when sending SRS required pre-coding matrix (such as, can determine subprocess two, three required pre-coding matrix when transmission SRS according to the descending SRS that the base station sends), therefore as can be known, in embodiments of the present invention, subprocess one also can be implemented in practice.
Embodiment one:
The process that sends SRS among the embodiment one comprises following three subprocess SRS_0, SRS_UL and SRS_DL, wherein, and being described in detail as follows of each process:
SRS_0: in this course, SRS need not directly to send through the pre-coding matrix coding, therefore the SRS that sends in this course is Non-precoded SRS, can be based on the channel information that this Non-precodedSRS obtains with helping determine required pre-coding matrix information among the SRS_UL, UE can be periodic to the transmission of SRS among this subprocess SRS_0, also can be acyclic, can also be after receiving the notification message that is used to notify UE to send SRS of base station transmission, just to send again, behind the Non-precoded SRS that the base station sends in receiving subprocess SRS_0, the required first pre-coding matrix information in the time of can determining among the subprocess SRS_UL to send SRS according to this Non-precoded SRS, and the required second pre-coding matrix information when sending SRS among definite subprocess SRS_DL, and will determine first, the second pre-coding matrix information sends to UE;
SRS_UL: in this course, send the demand of SRS in order to reduce to system resource, UE need determine pre-coding matrix according to the first pre-coding matrix information of base station notice, and again the SRS behind the coding is sent after utilizing this first pre-coding matrix that SRS is encoded, and behind the SRS behind the coding that the base station sends, be mainly used in up Adaptive Transmission such as up pre-coding matrix selection, multi-subscriber dispatching based on the estimated channel information that obtains of this SRS in receiving this subprocess SRS_UL;
SRS_DL: in this course, send the demand of SRS in order to reduce to system resource, UE sends the SRS behind the coding after also needing to utilize second pre-coding matrix of base station notice that the SRS signal is encoded again, in this embodiment one, the required pre-coding matrix information of this SRS_DL process is except can be by the notice of base station, can also be self-determining by UE, such as, UE can determine a pre-coding matrix according to the descending SRS that send the base station, need to prove that the estimated channel information that obtains of SRS that sends based on this SRS_DL is mainly used in the transmission of help descending self-adapting.
Sending the required relevant parameter of SRS in above-mentioned any one subprocess can realize by disposing, such as: periodicity or aperiodicity send SRS, the transmission Cycle Length when periodically sending SRS, single-carrier frequency division multiple access (SC-FDMA) character position at SRS place or the like.
(from the angle of transfer resource) to a certain extent, can regard above-mentioned three subprocess as three the independently processes of " Virtual User " transmission SRS, but these three subprocess might not be fully independently, they can have certain contact each other, such as, the SRS transmission bandwidth of SRS_0 correspondence can comprise the SRS transmission bandwidth of other two subprocess; The pre-coding matrix information (such as the order that can be pre-coding matrix) that the SRS of SRS_UL and SRS_DL adopts can be notified by the base station, thereby and the base station utilizes the SRS of SRS_0 transmission to come estimating channel information to determine the order of this pre-coding matrix often; The pre-coding matrix that SRS among the SRS_UL adopts also can be that the base station is determined by PMI, thereby and also can be SRS by the SRS_0 transmission come estimating channel information to determine this pre-coding matrix in the base station; In addition, with respect to other two subprocess, the average transmission time interval of SRS can be longer among the SRS_0, like this to guarantee that sending SRS in the SRS_0 process can not take too many resource.
According to above-mentioned analysis, the SRS of above-mentioned three subprocess is transmitted in the SRS transmission that can regard three " Virtual User " to a certain extent as, so the SRS transfer resource of these three subprocess can be undertaken multiplexing by following several modes:
Time division multiplexing: the SRS transmission of three subprocess occurs on the different SC-FDMA symbols;
The subcarrier that is used for transmitting SRS in frequency division multiplexing: SRS_UL and the SRS_DL subprocess is different, such as, can be on different broach, or on the different subbands;
Code division multiplexing: different SRS sequences is adopted in the SRS of three subprocess transmission, and different SRS sequences quadrature or accurate quadrature each other;
In addition, can also adopt the hybrid mode of above-mentioned three kinds of modes that SRS is transmitted, such as, the mode that can have any two SRS to be based on time-division/frequency division/code division multiplexing among the SRS in three subprocess is transmitted.
Embodiment two:
Among the embodiment two, the delivery plan of SRS can comprise four subprocess, it is respectively: SRS_0_UL, SRS_0_DL, SRS_UL and SRS_DL, wherein, the definition of SRS_UL and SRS_DL subprocess is with above-mentioned embodiment one, do not repeat them here, and the SRS_0 among the embodiment one obtains SRS_0_UL and SRS_0_DL after being divided into two parts, and it is corresponding SRS_UL and SRS_DL subprocess respectively, need to prove, the SRS role and the embodiment one of the process of transmission SRS and transmission are similar among SRS_0_UL and the SRS_0_DL, and difference only is: the bandwidth that sends SRS among the SRS_0_UL only need comprise the bandwidth that sends SRS among the SRS_UL and get final product; The bandwidth that sends SRS simultaneously among the SRS_0_DL only need comprise the bandwidth that sends SRS among the SRS_DL and get final product.
Similar with embodiment one, from the angle of transfer resource, four subprocess of embodiment two can be regarded four " Virtual User " as and carry out SRS transmission, its transfer resource multiplex mode also with above-mentioned SRS resource multiplex mode roughly the same, repeat no more.
Embodiment three:
In embodiment three, SRS_0 subprocess among the embodiment one can be fused in the SRS_UL subprocess, such as, in the SRS_UL subprocess, can select the precoding that SRS adopted on some SC-FDMA character position for use and realize Non-precoded SRS transmission since the specific forms, thereby just can regard as originally need be at the Non-precoded SRS that SRS_0 sent for the SRS on those SC-FDMA character positions.Need to prove, can be to choose the above-mentioned SC-FDMA symbol that is used to send Non-precoded SRS by the semi-static configuration of system with coming property performance period, perhaps also can adopt acyclic mode, choose the above-mentioned SC-FDMA symbol that is used to send Non-precoded SRS by send means of signaling notice UE to UE by the base station.At the scheme that the SRS_0 subprocess is fused to the SRS_UL subprocess that embodiment three proposes, the situation for UE adopts two transmitting antennas, can adopt the following fusion that realizes SRS_0 and SRS_UL of sending:
---------------------------------------------------------time domain
…SRS_UL
Figure BSA00000128758600101
SRS_UL SRS_UL
Figure BSA00000128758600102
SRS_UL…
---------------------------------------------------------time domain
…SRS_UL
Figure BSA00000128758600103
SRS_UL SRS_UL SRS_UL…
The normal transmission of the SRS_UL subprocess in the SRS_UL representation scheme one wherein;
Figure BSA00000128758600105
With
Figure BSA00000128758600106
Represent respectively to adopt in the SRS_UL subprocess With
Figure BSA00000128758600108
Pre-coding matrix as SRS;
Similarly, the SRS_0 subprocess among the embodiment one also can be fused in the SRS_DL subprocess, perhaps is fused to simultaneously in two subprocess of SRS_UL and SRS_DL, and its implementation procedure and above-mentionedly SRS_0 is fused among the SRS_UL similar repeats no more.
Embodiment four:
In embodiment four, with be fused to SRS_0 among the SRS_UL among the embodiment three or similar among the SRS_DL, SRS_0_UL among the embodiment two and SRS_0_DL subprocess can be fused to respectively among SRS_UL and the SRS_DL, implementation procedure among the implementation procedure of specific embodiment four and the embodiment three is similar, does not repeat them here.
Correspondingly, the embodiment of the invention also provides the method for a kind of SRS of reception, this method is: the base station receives a SRS and the 2nd SRS that user terminal sends, wherein, wherein, a SRS is used for pre-coding matrix that the SRS that helps uplink is encoded for the user terminal utilization, and SRS is encoded to be obtained, second pre-coding matrix is used for pre-coding matrix that the SRS that helps downlink transfer is encoded for the user terminal utilization, and SRS is encoded to be obtained.
The method of the transmission SRS that provides corresponding to the embodiment of the invention, the embodiment of the invention provides in the method that receives SRS, the base station can also provide first, second pre-coding matrix to user terminal, and particularly, the base station can adopt following dual mode to determine pre-coding matrix:
First kind of mode:
The base station can receive the Three S's RS that user terminal sends, thereby according to Three S's RS, determines first pre-coding matrix, and sends descending SRS and the first definite pre-coding matrix to user terminal.
The second way:
The base station can receive the Three S's RS that user terminal sends; Thereby according to Three S's RS, determine first, second pre-coding matrix, and send first, second pre-coding matrix of determining to user terminal.
The method of the transmission SRS that provides corresponding to the embodiment of the invention, the embodiment of the invention also provides the device of a kind of SRS of transmission, and the concrete structure schematic diagram of this device comprises following functional unit as shown in Figure 3:
Pre-coding matrix determining unit 31 is used to second pre-coding matrix that is identified for first pre-coding matrix that the SRS that helps uplink is encoded and is used for the SRS that helps downlink transfer is encoded;
Coding unit 32, first pre-coding matrix, second pre-coding matrix that are used to utilize pre-coding matrix determining unit 31 to determine are encoded to SRS respectively and are obtained a SRS, the 2nd SRS;
Transmitting element 33 is used for sending a SRS, the 2nd SRS that coding unit 32 obtains to the base station.
In embodiments of the present invention, corresponding to the dual mode of determining first pre-coding matrix and second pre-coding matrix, can also further divide pre-coding matrix determining unit 31, preferably, pre-coding matrix determining unit 31 can be divided into following functional module, comprise:
Sending module is used for sending Three S's RS to the base station; Receiver module is used to receive the first pre-coding matrix information definite according to the Three S's RS of sending module transmission by the base station and that send, and receives the descending SRS that the base station sends; Determination module is used for the first pre-coding matrix information according to the receiver module reception, determines first pre-coding matrix, and according to the descending SRS that receiver module receives, determines second pre-coding matrix.
Perhaps, also pre-coding matrix determining unit 31 can be divided into following functional module:
Sending module is used for sending Three S's RS to the base station; Receiver module is used to receive the first pre-coding matrix information and the second pre-coding matrix information definite according to the Three S's RS of sending module transmission by the base station and that send; Determination module is used for the first pre-coding matrix information and the second pre-coding matrix information according to the receiver module reception, determines first pre-coding matrix and second pre-coding matrix respectively.
In order to reduce to send Three S's RS to the demand of time-frequency code resource, in embodiments of the present invention, the average transmission of Three S's RS at interval can be greater than the average transmission interval of a SRS, and average transmission interval greater than the 2nd SRS, at this moment, above-mentioned sending module can specifically be used for sending Three S's RS to the base station on the 3rd bandwidth, wherein, sends the 3rd used bandwidth of Three S's RS and comprises the first used bandwidth of transmission the one SRS and send the second used bandwidth of two SRS.
Perhaps, sending module can also specifically be used for sending Three S's RS to the base station in the four-tape respectively on wide and the 5th bandwidth, and wherein, the four-tape sends the first used bandwidth of a SRS wide comprising, and the 5th bandwidth comprises and sends the second used bandwidth of the 2nd SRS.
In addition, the embodiment of the invention also provides the device of a kind of SRS of reception, in order to when reducing the required time-frequency code resource of transmission SRS, helps communication system to realize the up and downlink transfer of better performances, the concrete structure schematic diagram of this device comprises following functional unit as shown in Figure 4:
First receiving element 41 is used to receive the SRS that user terminal sends, and wherein, a SRS is used for pre-coding matrix that the SRS that helps uplink is encoded and SRS is encoded obtains for the user terminal utilization;
Second receiving element 42 is used to receive the 2nd SRS that user terminal sends, and the 2nd SRS is used for pre-coding matrix that the SRS that helps downlink transfer is encoded and SRS is encoded obtains for the user terminal utilization.
Preferably, the device of the above-mentioned reception SRS that provides of the embodiment of the invention can further include:
The 3rd receiving element is used for receiving the Three S's RS that user terminal sends receive first Sounding Reference Signal and second receiving element, 42 reception second channel detection reference signals at first receiving element 41 before; The pre-coding matrix determining unit is used for the Three S's RS according to the reception of the 3rd receiving element, determines first pre-coding matrix; Transmitting element is used for sending descending SRS and the first definite pre-coding matrix of pre-coding matrix determining unit to user terminal.
Perhaps, the device of the above-mentioned reception SRS that provides of the embodiment of the invention also may further include:
The 3rd receiving element is used for receiving the Three S's RS that user terminal sends before first receiving element 41 receives first Sounding Reference Signal and second receiving element, 42 reception second channel detection reference signals; The pre-coding matrix determining unit is used for the Three S's RS according to the reception of second receiving element, determines first, second pre-coding matrix; Transmitting element is used for sending first, second pre-coding matrix that the pre-coding matrix determining unit is determined to 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, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (21)

1.一种发送信道探测参考信号的方法，其特征在于，包括：1. A method for sending a channel sounding reference signal, characterized in that, comprising: 用户终端确定用于对帮助上行传输的信道探测参考信号进行编码的第一预编码矩阵和用于对帮助下行传输的信道探测参考信号进行编码的第二预编码矩阵；并The user terminal determines a first precoding matrix used to encode channel sounding reference signals that assist uplink transmission and a second precoding matrix that is used to encode channel sounding reference signals that assist downlink transmission; and 利用第一预编码矩阵、第二预编码矩阵分别对信道探测参考信号进行编码，得到第一信道探测参考信号、第二信道探测参考信号；以及Encoding the channel sounding reference signal by using the first precoding matrix and the second precoding matrix respectively, to obtain the first channel sounding reference signal and the second channel sounding reference signal; and 向基站发送第一信道探测参考信号和第二信道探测参考信号。Send the first channel sounding reference signal and the second channel sounding reference signal to the base station. 2.如权利要求1所述的方法，其特征在于，确定第一预编码和第二预编码矩阵具体包括：2. The method according to claim 1, wherein determining the first precoding matrix and the second precoding matrix specifically comprises: 用户终端向基站发送第三信道探测参考信号；以及The user terminal sends a third channel sounding reference signal to the base station; and 接收由基站根据第三信道探测参考信号确定并发送来的第一预编码矩阵信息，根据第一预编码矩阵信息确定第一预编码矩阵；receiving the first precoding matrix information determined and sent by the base station according to the third channel sounding reference signal, and determining the first precoding matrix according to the first precoding matrix information; 并根据基站发送的下行信道探测参考信号，确定第二预编码矩阵。And determine the second precoding matrix according to the downlink channel sounding reference signal sent by the base station. 3.如权利要求1所述的方法，其特征在于，确定第一预编码矩阵和第二预编码矩阵具体包括：3. The method according to claim 1, wherein determining the first precoding matrix and the second precoding matrix specifically comprises: 用户终端向基站发送第三信道探测参考信号；并The user terminal sends a third channel sounding reference signal to the base station; and 接收由基站根据第三信道探测参考信号确定并发送来的第一预编码矩阵信息和第二预编码矩阵信息；receiving the first precoding matrix information and the second precoding matrix information determined and sent by the base station according to the third channel sounding reference signal; 根据第一预编码矩阵信息和第二预编码矩阵信息，分别确定第一预编码矩阵和第二预编码矩阵。Determine the first precoding matrix and the second precoding matrix respectively according to the first precoding matrix information and the second precoding matrix information. 4.如权利要求2或3所述的方法，其特征在于，第一、第二、第三信道探测参考信号由用户终端在接收到基站发送的用于通知发送信道探测参考信号的消息后向基站发送，或由用户终端周期性地向基站发送。4. The method according to claim 2 or 3, wherein the first, second, and third channel sounding reference signals are sent by the user terminal after receiving the message sent by the base station for notifying sending of the channel sounding reference signal The base station sends, or the user terminal periodically sends to the base station. 5.如权利要求2或3所述的方法，其特征在于，第三信道探测参考信号的平均发送间隔大于第一信道探测参考信号的平均发送间隔，且大于第二信道探测参考信号的平均发送间隔；以及5. The method according to claim 2 or 3, wherein the average transmission interval of the third channel sounding reference signal is greater than the average transmission interval of the first channel sounding reference signal, and greater than the average transmission interval of the second channel sounding reference signal interval; and 用户终端向基站发送第三信道探测参考信号具体为：The user terminal sends the third channel sounding reference signal to the base station specifically as follows: 用户终端在第三带宽上向基站发送第三信道探测参考信号，其中，发送第三信道探测参考信号所用的第三带宽包含发送第一信道探测参考信号所用的第一带宽和发送二信道探测参考信号所用的第二带宽。The user terminal sends the third channel sounding reference signal to the base station on the third bandwidth, wherein the third bandwidth used for sending the third channel sounding reference signal includes the first bandwidth used for sending the first channel sounding reference signal and the second channel sounding reference signal. The second bandwidth used by the signal. 6.如权利要求5所述的方法，其特征在于，第一、第二、第三信道探测参考信号采用时分复用或频分复用或码分复用的方式发送。6. The method according to claim 5, characterized in that the first, second and third channel sounding reference signals are sent in a manner of time division multiplexing, frequency division multiplexing or code division multiplexing. 7.如权利要求2或3所述的方法，其特征在于，第三信道探测参考信号的平均发送间隔大于第一信道探测参考信号的平均发送间隔，且大于第二信道探测参考信号的平均发送间隔；以及7. The method according to claim 2 or 3, wherein the average transmission interval of the third channel sounding reference signal is greater than the average transmission interval of the first channel sounding reference signal, and greater than the average transmission interval of the second channel sounding reference signal interval; and 用户终端向基站发送第三信道探测参考信号具体为：The user terminal sends the third channel sounding reference signal to the base station specifically as follows: 所述用户终端在第四带宽和第五带宽上分别向基站发送第三信道探测参考信号，其中，第四带宽包含发送第一信道探测参考信号所用的第一带宽，第五带宽包含发送二信道探测参考信号所用的第二带宽。The user terminal sends the third channel sounding reference signal to the base station respectively on the fourth bandwidth and the fifth bandwidth, wherein the fourth bandwidth includes the first bandwidth used for sending the first channel sounding reference signal, and the fifth bandwidth includes sending the second channel sounding reference signal The second bandwidth used by the sounding reference signal. 8.如权利要求7所述的方法，其特征在于，还包括：确定将要同时发送第一信道探测参考信号与第三信道探测参考信号的第一时刻，并确定将要同时发送第二信道探测参考信号与第三信道探测参考信号的第二时刻；以及8. The method according to claim 7, further comprising: determining the first moment at which the first channel sounding reference signal and the third channel sounding reference signal will be simultaneously transmitted, and determining that the second channel sounding reference signal will be simultaneously transmitted a second time instant between the signal and the third channel sounding reference signal; and 发送第一信道探测参考信号具体为：Sending the first channel sounding reference signal is specifically: 在第一带宽上发送第一信道探测参考信号，并在所述第一时刻暂停第一信道探测参考信号的发送；以及transmitting a first channel sounding reference signal over a first bandwidth, and suspending transmission of the first channel sounding reference signal at said first moment; and 发送第二信道探测参考信号具体为：Sending the second channel sounding reference signal is specifically: 在第二带宽上发送第二信道探测参考信号，并在所述第二时刻暂停第二信道探测参考信号的发送。Sending the second channel sounding reference signal on the second bandwidth, and suspending the sending of the second channel sounding reference signal at the second moment. 9.如权利要求7所述的方法，其特征在于，所述用户终端在第一带宽上，采用时分复用或频分复用或码分复用的方式向基站发送第一、第三信道探测参考信号；或9. The method according to claim 7, wherein the user terminal transmits the first and third channels to the base station in the manner of time division multiplexing, frequency division multiplexing or code division multiplexing on the first bandwidth. sounding reference signal; or 所述用户终端在第二带宽上，采用时分复用或频分复用或码分复用的方式向基站发送第二、第三信道探测参考信号。The user terminal sends the second and third channel sounding reference signals to the base station in a manner of time division multiplexing, frequency division multiplexing or code division multiplexing on the second bandwidth. 10.一种接收信道探测参考信号的方法，其特征在于，包括：10. A method for receiving a channel sounding reference signal, comprising: 基站接收用户终端发送的第一信道探测参考信号和第二信道探测参考信号，其中，第一信道探测参考信号为用户终端利用用于对帮助上行传输的信道探测参考信号进行编码的预编码矩阵，对信道探测参考信号进行编码得到的，第二预编码矩阵为用户终端利用用于对帮助下行传输的信道探测参考信号进行编码的预编码矩阵，对信道探测参考信号进行编码得到的。The base station receives the first channel sounding reference signal and the second channel sounding reference signal sent by the user terminal, wherein the first channel sounding reference signal is a precoding matrix used by the user terminal to encode the channel sounding reference signal that facilitates uplink transmission, The channel sounding reference signal is encoded, and the second precoding matrix is obtained by the user terminal encoding the channel sounding reference signal by using the precoding matrix used to encode the channel sounding reference signal that facilitates downlink transmission. 11.如权利要求10所述的方法，其特征在于，基站接收用户终端发送的第一信道探测参考信号和第二信道探测参考信号前，还包括：11. The method according to claim 10, wherein before receiving the first channel sounding reference signal and the second channel sounding reference signal sent by the user terminal, the base station further comprises: 基站接收用户终端发送来的第三信道探测参考信号；并The base station receives the third channel sounding reference signal sent by the user terminal; and 根据第三信道探测参考信号，确定第一预编码矩阵；以及Determine the first precoding matrix according to the third channel sounding reference signal; and 向用户终端发送下行信道探测参考信号和确定的第一预编码矩阵。Send the downlink channel sounding reference signal and the determined first precoding matrix to the user terminal. 12.如权利要求10所述的方法，其特征在于，基站接收用户终端发送的第一信道探测参考信号和第二信道探测参考信号前，还包括：12. The method according to claim 10, wherein before receiving the first channel sounding reference signal and the second channel sounding reference signal sent by the user terminal, the base station further comprises: 基站接收用户终端发送来的第三信道探测参考信号；并The base station receives the third channel sounding reference signal sent by the user terminal; and 根据第三信道探测参考信号，确定第一、第二预编码矩阵；以及Determine the first and second precoding matrices according to the third channel sounding reference signal; and 向用户终端发送确定的第一、第二预编码矩阵。Send the determined first and second precoding matrices to the user terminal. 13.一种发送信道探测参考信号的装置，其特征在于，包括：13. A device for sending a channel sounding reference signal, characterized in that it comprises: 预编码矩阵确定单元，用于确定用于对帮助上行传输的信道探测参考信号进行编码的第一预编码矩阵和用于对帮助下行传输的信道探测参考信号进行编码的第二预编码矩阵；A precoding matrix determining unit, configured to determine a first precoding matrix used to encode a channel sounding reference signal for assisting uplink transmission and a second precoding matrix for encoding a channel sounding reference signal for assisting downlink transmission; 编码单元，用于利用预编码矩阵确定单元确定的第一预编码矩阵、第二预编码矩阵，分别对信道探测参考信号进行编码得到第一信道探测参考信号、第二信道探测参考信号；The encoding unit is configured to use the first precoding matrix and the second precoding matrix determined by the precoding matrix determining unit to respectively encode the channel sounding reference signal to obtain the first channel sounding reference signal and the second channel sounding reference signal; 发送单元，用于向基站发送编码单元得到的第一信道探测参考信号和第二信道探测参考信号。The sending unit is configured to send the first channel sounding reference signal and the second channel sounding reference signal obtained by the encoding unit to the base station. 14.如权利要求13所述的装置，其特征在于，所述预编码矩阵确定单元具体包括：14. The device according to claim 13, wherein the precoding matrix determining unit specifically comprises: 发送模块，用于向基站发送第三信道探测参考信号；以及a sending module, configured to send a third channel sounding reference signal to the base station; and 接收模块，用于接收由基站根据发送模块发送的第三信道探测参考信号确定并发送来的第一预编码矩阵信息，以及接收基站发送的下行信道探测参考信号；The receiving module is configured to receive the first precoding matrix information determined and sent by the base station according to the third channel sounding reference signal sent by the sending module, and receive the downlink channel sounding reference signal sent by the base station; 确定模块，用于根据接收模块接收的第一预编码矩阵信息确定第一预编码矩阵，并根据接收模块接收的下行信道探测参考信号确定第二预编码矩阵。The determining module is configured to determine the first precoding matrix according to the first precoding matrix information received by the receiving module, and determine the second precoding matrix according to the downlink channel sounding reference signal received by the receiving module. 15.如权利要求13所述的装置，其特征在于，所述预编码矩阵确定单元具体包括：15. The device according to claim 13, wherein the precoding matrix determining unit specifically comprises: 发送模块，用于向基站发送第三信道探测参考信号；a sending module, configured to send a third channel sounding reference signal to the base station; 接收模块，用于接收由基站根据发送模块发送的第三信道探测参考信号确定并发送来的第一预编码矩阵信息和第二预编码矩阵信息；The receiving module is configured to receive the first precoding matrix information and the second precoding matrix information determined and sent by the base station according to the third channel sounding reference signal sent by the sending module; 确定模块，用于根据接收模块接收的第一预编码矩阵信息和第二预编码矩阵信息，分别确定第一预编码矩阵和第二预编码矩阵。The determining module is configured to respectively determine the first precoding matrix and the second precoding matrix according to the first precoding matrix information and the second precoding matrix information received by the receiving module. 16.如权利要求14或15所述的装置，其特征在于，第三信道探测参考信号的平均发送间隔大于第一信道探测参考信号的平均发送间隔，且大于第二信道探测参考信号的平均发送间隔；以及16. The device according to claim 14 or 15, wherein the average transmission interval of the third channel sounding reference signal is greater than the average transmission interval of the first channel sounding reference signal, and greater than the average transmission interval of the second channel sounding reference signal interval; and 所述发送模块具体用于在第三带宽上向基站发送第三信道探测参考信号，其中，发送第三信道探测参考信号所用的第三带宽包含发送第一信道探测参考信号所用的第一带宽和发送二信道探测参考信号所用的第二带宽。The sending module is specifically configured to send a third channel sounding reference signal to the base station on a third bandwidth, where the third bandwidth used for sending the third channel sounding reference signal includes the first bandwidth used for sending the first channel sounding reference signal and The second bandwidth used for sending the two-channel sounding reference signal. 17.如权利要求14或15所述的装置，其特征在于，第三信道探测参考信号的平均发送间隔大于第一信道探测参考信号的平均发送间隔，且大于第二信道探测参考信号的平均发送间隔；以及17. The device according to claim 14 or 15, wherein the average transmission interval of the third channel sounding reference signal is greater than the average transmission interval of the first channel sounding reference signal, and greater than the average transmission interval of the second channel sounding reference signal interval; and 所述发送模块具体用于在第四带宽和第五带宽上分别向基站发送第三信道探测参考信号，其中，第四带宽包含发送第一信道探测参考信号所用的第一带宽，第五带宽包含发送第二信道探测参考信号所用的第二带宽。The sending module is specifically configured to send the third channel sounding reference signal to the base station respectively on the fourth bandwidth and the fifth bandwidth, wherein the fourth bandwidth includes the first bandwidth used for sending the first channel sounding reference signal, and the fifth bandwidth includes A second bandwidth used for sending the second channel sounding reference signal. 18.如权利要求17所述的装置，其特征在于，还包括：18. The apparatus of claim 17, further comprising: 时刻确定单元，用于确定将要同时发送第一信道探测参考信号与第三信道探测参考信号的第一时刻，并确定将要同时发送第二信道探测参考信号与第三信道探测参考信号的第二时刻；以及所述发送单元具体包括：A moment determining unit, configured to determine a first moment at which the first channel sounding reference signal and a third channel sounding reference signal will be sent simultaneously, and determine a second moment at which the second channel sounding reference signal and the third channel sounding reference signal will be simultaneously sent ; and the sending unit specifically includes: 第一发送模块，用于在第一带宽上发送第一信道探测参考信号，并在时刻确定单元确定的第一时刻暂停第一信道探测参考信号的发送；The first sending module is configured to send the first channel sounding reference signal on the first bandwidth, and suspend the sending of the first channel sounding reference signal at the first time determined by the time determination unit; 第二发送模块，用于在第二带宽上发送第二信道探测参考信号，并在时刻确定单元确定的第二时刻暂停第二信道探测参考信号的发送。The second sending module is configured to send the second channel sounding reference signal on the second bandwidth, and suspend the sending of the second channel sounding reference signal at the second time determined by the time determining unit. 19.一种接收信道探测参考信号的装置，其特征在于，包括：19. A device for receiving a channel sounding reference signal, characterized in that it comprises: 第一接收单元，用于接收用户终端发送的第一信道探测参考信号，其中，第一信道探测参考信号为用户终端利用用于对帮助上行传输的信道探测参考信号进行编码的预编码矩阵，对信道探测参考信号进行编码得到的；The first receiving unit is configured to receive a first channel sounding reference signal sent by a user terminal, wherein the first channel sounding reference signal is a precoding matrix used by the user terminal to encode a channel sounding reference signal that facilitates uplink transmission. obtained by encoding the channel sounding reference signal; 第二接收单元，用于接收用户终端发送的第二信道探测参考信号，其中，第二信道探测参考信号为用户终端利用用于对帮助下行传输的信道探测参考信号进行编码的预编码矩阵，对信道探测参考信号进行编码得到的。The second receiving unit is configured to receive a second channel sounding reference signal sent by the user terminal, wherein the second channel sounding reference signal is a precoding matrix used by the user terminal to encode the channel sounding reference signal that facilitates downlink transmission. It is obtained by encoding the channel sounding reference signal. 20.如权利要求19所述的装置，其特征在于，还包括：20. The apparatus of claim 19, further comprising: 第三接收单元，用于在第一接收单元接收第一信道探测参考信号以及第二接收单元接收第二信道探测参考信号前，接收用户终端发送来的第三信道探测参考信号；The third receiving unit is configured to receive the third channel sounding reference signal sent by the user terminal before the first receiving unit receives the first channel sounding reference signal and the second receiving unit receives the second channel sounding reference signal; 预编码矩阵确定单元，用于根据第三接收单元接收的第三信道探测参考信号确定第一预编码矩阵；a precoding matrix determining unit, configured to determine the first precoding matrix according to the third channel sounding reference signal received by the third receiving unit; 发送单元，用于向用户终端发送下行信道探测参考信号和预编码矩阵确定单元确定的第一预编码矩阵。The sending unit is configured to send the downlink channel sounding reference signal and the first precoding matrix determined by the precoding matrix determining unit to the user terminal. 21.如权利要求19所述的装置，其特征在于，还包括：21. The apparatus of claim 19, further comprising: 第三接收单元，用于在第一接收单元接收第一信道探测参考信号以及第二接收单元接收第二信道探测参考信号前，接收用户终端发送来的第三信道探测参考信号；The third receiving unit is configured to receive the third channel sounding reference signal sent by the user terminal before the first receiving unit receives the first channel sounding reference signal and the second receiving unit receives the second channel sounding reference signal; 预编码矩阵确定单元，用于根据第三接收单元接收的第三信道探测参考信号确定第一、第二预编码矩阵；a precoding matrix determining unit, configured to determine the first and second precoding matrices according to the third channel sounding reference signal received by the third receiving unit; 发送单元，用于向用户终端发送预编码矩阵确定单元确定的第一、第二预编码矩阵。A sending unit, configured to send the first and second precoding matrices determined by the precoding matrix determining unit to the user terminal.
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