CN105991264A

CN105991264A - Method for transmitting sounding reference signal (SRS), apparatus and system

Info

Publication number: CN105991264A
Application number: CN201510057156.8A
Authority: CN
Inventors: 王瑜新; 李劲菊; 陈艺戬; 鲁照华; 李儒岳
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2015-02-03
Filing date: 2015-02-03
Publication date: 2016-10-05
Anticipated expiration: 2035-02-03
Also published as: CN105991264B; WO2016124060A1

Abstract

The invention provides a method for transmitting sounding reference signals (SRS). The method includes the following steps that: a base station sets the configuration information of the sounding reference signals (SRS) and issues the configuration information of the sounding reference signals (SRS) to a terminal device, wherein the configuration information contains precoding enabling indication information used for indicting the terminal device whether to pre-code the SRS or not, wherein the precoding enabling indication information contains a downlink transmission mode, or a downlink control signaling format, or the number of the transmission blocks of the terminal device, or the joint indication information of an antenna port, an scrambling ID and the number of layers. The invention also provides an apparatus for realizing the method and a system.

Description

The sending method of a kind of measuring reference signals, equipment and system

Technical field

(Sounding Reference Signal is referred to as to the present invention relates to measuring reference signals in the communications field SRS) transmission technology, particularly relates to the sending method of a kind of SRS, equipment and system.

Background technology

SRS is for measuring radio channel information (Channel State between a kind of terminal unit and base station Information, referred to as CSI) signal.In long evolving system, the band that UE indicates according to eNB The parameters such as width, frequency domain position, sequence cyclic shift, cycle and sub-frame offset, timing is sending subframe Uplink SRS is sent on later data symbol.ENB judges the up CSI of UE according to the SRS received, And the operations such as frequency domain selection scheduling, close-loop power control are carried out according to the CSI obtained.

The research of existing LTE-A Release 10 (LTE-A version 10) proposes: at uplink communication In, it should use the SRS of non-precoded, it may be assumed that the SRS that antenna is proprietary, and be used for solving to PUSCH The reference signal (De Modulation Reference Signal, referred to as DMRS) adjusted then carries out precoding. Base station, by receiving the SRS of non-precoded, can estimate up original CSI, and have passed through precoding DMRS then can not make base station estimate up original CSI.Now, use multiple antennas transmission non-as UE During the SRS of precoding, the SRS resource required for each UE can increase, can in also having resulted in system Decline with the UE quantity of concurrent multiplexing.UE can be passed through high-level signaling and (also referred to as be touched by trigger type 0 Send out) or Downlink Control Information (also referred to as being triggered by trigger type 1) both triggering modes transmission SRS, Based on high-level signaling trigger for cycle SRS, based on Downlink Control Information trigger for SRS aperiodic.Though So in LTE-A Release 10, add the mode sending SRS aperiodic, improve SRS to a certain extent The utilization rate of resource, improves the motility of scheduling of resource.

But, in following LTE-A Release 13 (LTE-A version 13) research, the MIMO of complete dimension (Full Dimension-MIMO, referred to as FD-MIMO) or the MIMO of/a large amount of antennas (Massive-MIMO) system is in order to reduce the resource overhead of descending pilot frequency and reduce the feedback quantity of UE, often Channel reciprocity often can be utilized to obtain descending CSI, therefore, the multiplexing capacity to SRS by measuring SRS Estimate that accuracy of measurement is just had higher requirement with channel.Save SRS resource the most further, improve SRS resource utilization rate, improves the channel estimating performance of SRS, reduces the SRS interference to adjacent area, to realize More effectively support FD-MIMO/Massive-MIMO systematic difference, be problem demanding prompt solution.Pin To the problems referred to above in correlation technique, there is no effective solution at present.

Summary of the invention

For solving the technical problem of existing existence, the embodiment of the present invention provides the transmission of a kind of measuring reference signals Method, apparatus and system.

Embodiments providing the sending method of a kind of measuring reference signals (SRS), the method includes:

Base station arranges the configuration information of SRS, and issues the configuration information of described SRS to terminal unit；

Described configuration information includes: for indicating whether described terminal unit carries out precoding to described SRS Precoding enable instruction；

Wherein, described precoding enable instruction includes:

The transmission block quantity of downlink transfer pattern or descending control signaling form or terminal unit or antenna The joint instructions information of port, scrambler ID and the number of plies.

The embodiment of the present invention additionally provides the sending method of a kind of SRS, and the method includes:

Terminal unit receives the configuration information of the SRS that base station issues, and sends out according to the configuration information of described SRS Send the SRS of precoding or do not carry out the SRS of precoding；

Wherein, described precoding enable instruction includes:

The embodiment of the present invention additionally provides a kind of base station, and described base station includes: arrange module and sending module； Wherein,

Described module is set, for arranging the configuration information of SRS, and is forwarded to described sending module；

Described sending module, for issuing the configuration information of described SRS to terminal unit；

Wherein, described configuration information includes: be used for indicating whether described SRS is carried out pre-by described terminal unit The precoding enable instruction of coding；

Described precoding enable instruction includes:

The embodiment of the present invention additionally provides a kind of terminal unit, and described terminal unit includes: receiver module and place Reason sending module；Wherein,

Described receiver module, for receiving the configuration information of the SRS that base station issues, and is forwarded to described process Sending module；

Described process sending module, for sending the SRS or not of precoding according to the configuration information of described SRS Carry out the SRS of precoding；

Wherein, described precoding enable instruction includes:

The embodiment of the present invention additionally provides the transmission system of a kind of SRS, and this system includes: base mentioned above Stand and terminal unit.

The sending method of measuring reference signals, equipment and the system that the embodiment of the present invention provides, base station arranges SRS Configuration information, and issue the configuration information of described SRS to terminal unit；Described configuration information includes: use In the precoding enable instruction indicating described terminal unit whether described SRS carries out precoding；Wherein, Described precoding enable instruction includes: downlink transfer pattern or descending control signaling form or terminal The transmission block quantity of equipment or the joint instructions information of antenna port, scrambler ID and the number of plies.The present invention implements Example can realize user terminal and send and have passed through the SRS of precoding, by the precoding of SRS is enabled control with Transmission mode or descending control signaling form or transmission block quantity or antenna port scrambler ID and the associating of the number of plies Instruction information is bound, and solves SRS precoding and enables the problem controlled, saves the expense of downlink signaling, Thus realize more effective SRS precoding and send, save SRS multiplexed resource, reduce SRS to adjacent area Interference, and then reached to improve the effect of systematic entirety energy.

Accompanying drawing explanation

In accompanying drawing (it is not necessarily drawn to scale), similar reference can be at different views Described in similar parts.The similar reference numerals with different letter suffix can represent the difference of similar component Example.Accompanying drawing generally shows each embodiment discussed herein by way of example and not limitation.

Fig. 1 is the pectinate texture schematic diagram of SRS in correlation technique；

Fig. 2 is the sending method flowchart of measuring reference signals described in the embodiment of the present invention；

Fig. 3 is the sending method flowchart of measuring reference signals described in another embodiment of the present invention；

Fig. 4 is the structural representation of base station described in the embodiment of the present invention；

Fig. 5 is the structural representation of terminal unit described in the embodiment of the present invention；

Fig. 6 is that the configuration of the configuration information that base station described in the specific embodiment of the invention two sends to terminal unit is shown It is intended to.

Detailed description of the invention

From correlation technique, Long Term Evolution (Long Term Evolution, referred to as LTE) system Uplink physical channel comprises Physical Random Access Channel, and (Physical Random Access Channel is called for short For PRACH), Physical Uplink Shared Channel (Physical uplink shared channel, referred to as PUS CH), Physical Uplink Control Channel (Physical uplink control channel, referred to as PUCCH).

In LTE, physical downlink control channel PDCCH (Physical downlink control channe L, referred to as PDCCH) it is used for carrying uplink and downlink schedule information, and uplink power control information.Base Standing (e-Node-B, referred to as eNB) can be by Downlink Control Information configuration user terminal (User Equi Pment, referred to as UE), or the configuration of terminal unit acceptance high-rise (higher layers), also referred to as UE is configured by high-level signaling.Described Downlink Control Information (Downlink Control Information, Referred to as DCI) form (format) be divided into DCI format 0,1,1A, 1B, 1C, 1D, 2, 2A, 2B, 3,3A etc..Wherein,

Described DCI format 0 is used for indicating Physical Uplink Shared Channel (Physical uplink shared c Hannel, referred to as PUSCH) scheduling；

Described DCI format 1,1A, 1B, 1C, 1D are for the Physical Downlink Shared Channel of single transport block The different transmission mode of (Physical Downlink Shared Channel, referred to as PDSCH)；

Described DCI format 2,2A, 2B are for the different transmission mode of descending PDSCH space division multiplexing；

Described DCI format 3,3A are used for Physical Uplink Control Channel (Physical uplink control c Hannel, referred to as PUCCH) and the transmission of power control instruction of PUSCH.

The transport block size of above-mentioned DCI format 0,1A, 3,3A is the same, wherein DCI format 0, 1A uses 1 bit to carry out form differentiation.

In LTE system, the SRS sequence that UE sends is by Glycine tomentella sequenceCarry out in time domain Cyclic shift α obtains.Same root sequence is carried out different cyclic shifts α, it becomes possible to obtain difference SRS sequence, and mutually orthogonal between these SRS sequences obtained, therefore, it can these SR S sequence is distributed to different UE and is used, to realize the CDMA between UE.

It addition, in same SRS bandwidth, the subcarrier (sub-carrier) of SRS is spaced apart, It is to say, the transmission of SRS uses pectinate texture, the frequency comb (frequency comb) in LTE system Quantity be 2, the repeat factor value (RePetition Factor, referred to as RPF) also corresponding to time domain is 2.Fig. 1 is the pectinate texture schematic diagram of SRS in correlation technique, as it is shown in figure 1, each UE sends SR During S, only in two frequency comb of use, Comb=0 or Comb=1, shown.So, UE root According to the frequency comb Comb position instruction of the top signaling of 1 bit, only using frequency domain index is even number or odd number Subcarrier send SRS.This pectinate texture allows more UE to send SRS in same SRS bandwidth.

In same SRS bandwidth, multiple UE can use different cyclic shifts in same frequency comb, Then SRS is sent by code division multiplexing, it is also possible to two UE are in different frequency comb, multiple by frequency division With sending SRS.For example, in LTE system, send in certain SRS bandwidth (4 RB) The UE of SRS, it is possible to use cyclic shift have 8, it is possible to use frequency comb be 2, thus A total of 16 resources that can be used to send SRS of UE, say, that in this SRS bandwidth, How can send 16 SRS simultaneously.Owing to not supporting that in LTE system how defeated uplink single user multi input is Going out (Single User Multiple Input Multiple Output, referred to as SU-MI MO), UE is each Moment can only have antenna to send SRS, so a UE has only to a SRS resource, therefore, In above-mentioned SRS bandwidth, system at most can be with 16 UE of concurrent multiplexing.

Senior LTE (LTE-Advanced, referred to as LTE-A) system is the evolution of future generation of LTE system System, at up support SU-MIMO, and at most can use 4 antennas as up transmitting antenna. It is to say, UE can send SRS at synchronization on many antennas simultaneously, and eNB needs basis The SRS received on every antenna is to estimate the state on every channel.Descending control information format is former at LTE On the basis of formatted, add format 4 and be used for descending 8 for uplink MEVlO transmissions, format 2C The MIMO transmission of antenna, format 2D is for down collaboration multiple spot (Coordinated Multi-point, letter It is referred to as CoMP) transmission of system.

In embodiments of the invention, base station arranges the configuration information of SRS, and issues described SRS to terminal unit Configuration information；Described configuration information includes: be used for indicating whether described SRS is carried out by described terminal unit The precoding enable instruction of precoding；Wherein, described precoding enable instruction includes: descending biography The transmission block quantity of defeated pattern or descending control signaling form or terminal unit or antenna port, scrambler The joint instructions information of ID and the number of plies.

Below in conjunction with the accompanying drawings and the present invention is described in further detail by specific embodiment.

Fig. 2 is the sending method flowchart of SRS described in the embodiment of the present invention, as in figure 2 it is shown, the party Method includes:

Step 201: base station arranges the configuration information of SRS, described configuration information includes: be used for indicating described Whether terminal unit carries out the precoding enable instruction of precoding to described SRS；

Step 202: base station issues the configuration information of described SRS to terminal unit；

Wherein, described precoding enable instruction includes: downlink transfer pattern or descending control signaling lattice The transmission block quantity of formula or terminal unit or the joint instructions information of antenna port, scrambler ID and the number of plies.

The embodiment of the present invention can realize user terminal and send and have passed through the SRS of precoding, pre-by by SRS Coding enables control and transmission mode or descending control signaling form or transmission block quantity or antenna port scrambler The joint instructions information binding of ID and the number of plies, solves SRS precoding and enables the problem controlled, save down The expense of row signaling, thus realize more effective SRS precoding and send, save SRS multiplexed resource, reduce The SRS interference to adjacent area, and then reached to improve the effect of systematic entirety energy.

In the embodiment of the present invention, when described precoding enable instruction includes downlink transfer pattern, described base Station arranges the configuration information of SRS, including:

When base station configurating terminal device is downlink transfer pattern, then the SRS arranging terminal unit transmission is warp Cross the SRS of precoding；When base station configurating terminal device is uplink transmission mode, then terminal unit is set and sends out The SRS sent is the SRS of non-precoded；

Or, when base station configurating terminal device is downlink transfer pattern 8 or downlink transfer pattern 9 or descending When transmission mode 10 or downlink transfer pattern 11, then the SRS of terminal unit transmission is set for through prelisting The SRS of code；When base station configurating terminal device be except described downlink transfer pattern 8, downlink transfer pattern 9, under During transmission mode outside row transmission mode 10 and downlink transfer pattern 11, then arrange what terminal unit sent SRS is the SRS of non-precoded.

In the embodiment of the present invention, when described precoding enable instruction includes descending control signaling form, institute State base station and the configuration information of SRS is set, including:

When base station uses descending control signaling form 2B or descending control signaling form 2C or descending control When the descending control signaling triggering terminal equipment of signaling format 2D sends SRS, then base station arranges terminal unit The SRS sent is the SRS through precoding；When base station uses descending control signaling form 0 or descending control The descending control signaling triggering terminal equipment of signaling format 4 processed or descending control signaling form 1A sends SRS Time, then base station arranges the SRS that SRS is non-precoded that terminal unit sends；

Or, when base station use descending control signaling form 2B or descending control signaling form 2C or under Row controls the descending control signaling triggering terminal equipment of signaling format 2D or descending control signaling form 1A and sends out When sending SRS, then the SRS that base station configurating terminal device sends is the SRS through precoding；When base station uses The descending control signaling triggering terminal equipment of descending control signaling form 0 or descending control signaling format 4 is sent out When sending SRS, then base station arranges the SRS that SRS is non-precoded that terminal unit sends.

In the embodiment of the present invention, when described precoding enable instruction includes the transmission block quantity of terminal unit, Described base station arranges the configuration information of SRS, including:

When base station be 1 to the quantity of terminal equipment configuration uplink/downlink transmission block or only one of which up/ When downstream transmission blocks enables, then the SRS arranging terminal unit transmission is the SRS through precoding；Work as base station Quantity to terminal equipment configuration uplink/downlink transmission block is 2 or two uplink/downlink transmission blocks all enable Time, then the SRS that SRS is non-precoded that terminal unit sends is set.

In the embodiment of the present invention, described precoding enable instruction includes: antenna port, scrambler ID and layer During the joint instructions information counted, described base station arranges the configuration information of SRS, including:

Antenna port, scrambler ID and the connection of the number of plies in the descending control signaling of terminal equipment configuration when base station When high 1 value of conjunction instruction information is 0 or 1, then the SRS of terminal unit transmission is set for through prelisting The SRS of code；

Antenna port, scrambler ID and the connection of the number of plies in the descending control signaling of terminal equipment configuration when base station When high 1 value of conjunction instruction information is 1 or 0, then the SRS arranging terminal unit transmission is non-precoded SRS.

In one embodiment, described precoding enable instruction also includes: the week of instruction precoding SRS Phase and the information of sub-frame offset.

In the embodiment of the present invention, described base station arranges the configuration information of SRS, also includes:

Described base station is the cycle that described terminal unit arranges described precoding SRS by high-rise RRC signaling Information with sub-frame offset.

In one embodiment, described precoding enable instruction also includes: the finger of pre-coding matrix index Show information.

In the embodiment of the present invention, described precoding enable instruction includes: the instruction of pre-coding matrix index During information, described base station arranges the configuration information of SRS, including:

When pre-coding matrix index from base station to terminal equipment configuration indicate pre-coding matrix be unit battle array time, Terminal unit is then set and sends the SRS of non-precoded；

The pre-coding matrix indicated to the pre-coding matrix index of terminal equipment configuration when base station is non-unity battle array Time, then terminal unit is set and sends the SRS through precoding.

The embodiment of the present invention additionally provides the sending method of a kind of measuring reference signals SRS, as it is shown on figure 3, The method includes:

Step 301: terminal unit receives the configuration information of the SRS that base station issues, and described configuration information includes: For indicating whether described terminal unit carries out the precoding enable instruction of precoding to described SRS；

Step 302: terminal unit sends the SRS of precoding according to the configuration information of described SRS or do not carries out The SRS of precoding；

Described precoding enable instruction includes: downlink transfer pattern or descending control signaling form or The transmission block quantity of terminal unit or the joint instructions information of antenna port, scrambler ID and the number of plies.

In the embodiment of the present invention, described terminal unit sends precoding according to the configuration information of described SRS SRS or do not carry out the SRS of precoding, including:

When precoding enable instruction instruction in the configuration information of described SRS enables, described terminal unit Described SRS to be sent is carried out precoding, and sends the SRS of precoding to described base station；

When precoding enable instruction instruction in the configuration information of described SRS does not enables, described terminal sets The standby SRS not carrying out precoding to the transmission of described base station.

In the embodiment of the present invention, when described precoding enable instruction includes downlink transfer pattern,

Described terminal unit sends the SRS of precoding according to described configuration information or does not carries out precoding SRS, including:

Terminal unit determines when self being configured to downlink transfer pattern, sends the SRS through precoding；Really When determining self to be configured to uplink transmission mode, send the SRS of non-precoded；

Or, terminal unit determine self be configured to downlink transfer pattern 8 or downlink transfer pattern 9 or When downlink transfer pattern 10 or downlink transfer pattern 11, send the SRS through precoding；Determine self It is configured to except described downlink transfer pattern 8, downlink transfer pattern 9, downlink transfer pattern 10 and descending biography During transmission mode outside defeated pattern 11, send the SRS of non-precoded.

In the embodiment of the present invention, when described precoding enable instruction includes descending control signaling form,

Described terminal unit receive base station send trigger send SRS descending control signaling form 2B or During the descending control signaling of descending control signaling form 2C or descending control signaling form 2D, send and pass through The SRS of precoding；Receive the descending control signaling form 0 or descending triggering transmission SRS that base station sends When controlling the descending control signaling of signaling format 4 or descending control signaling form 1A, send non-precoded SRS；

Or, described terminal unit receives the descending control signaling form triggering transmission SRS that base station sends 2B or descending control signaling form 2C or descending control signaling form 2D or descending control signaling form During the descending control signaling of 1A, send the SRS through precoding；Receive the triggering transmission SRS that base station sends Descending control signaling form 0 or during the descending control signaling of descending control signaling format 4, send non-pre- The SRS of coding.

In the embodiment of the present invention, when described precoding enable instruction includes the transmission block quantity of terminal unit,

When the quantity of the uplink/downlink transmission block of the described terminal unit of base station configuration is 1 or only one of which When uplink/downlink transmission block enables, described terminal unit sends the SRS through precoding；When base station configuration The quantity of the uplink/downlink transmission block of described terminal unit is 2 or two uplink/downlink transmission blocks all enable Time, described terminal unit sends the SRS of non-precoded.

In the embodiment of the present invention, described precoding enable instruction includes antenna port, scrambler ID and the number of plies Joint instructions information time,

The joint instructions letter of antenna port, scrambler ID and the number of plies in the descending control signaling that terminal unit receives When high 1 value of breath is 0 or 1, send the SRS through precoding；In the descending control signaling received High 1 value of joint instructions information of antenna port, scrambler ID and number of plies when being 1 or 0, send non- The SRS of precoding.

In the embodiment of the present invention, described terminal unit sends the SRS or not of precoding according to described configuration information Carry out the SRS of precoding, including:

Described terminal unit determines that the subframe index of the transmission SRS that base station arranges meets described instruction and prelists During relation between code SRS cycle and sub-frame offset, send through the SRS of precoding；Otherwise, send non- The SRS of precoding.

In the embodiment of the present invention, described precoding enable instruction includes the instruction letter of pre-coding matrix index During breath,

When pre-coding matrix index from base station to terminal equipment configuration indicate pre-coding matrix be unit battle array time, Described terminal unit sends the SRS of non-precoded；

The pre-coding matrix indicated to the pre-coding matrix index of terminal equipment configuration when base station is non-unity battle array Time, described terminal unit sends the SRS through precoding.

The embodiment of the present invention additionally provides a kind of base station, and as shown in Figure 4, described base station 40 includes: arrange mould Block 401 and sending module 402；Wherein,

Described module 401 is set, for arranging the configuration information of SRS, and is forwarded to described sending module；

Described sending module 402, for issuing the configuration information of described SRS to terminal unit；

Described precoding enable instruction includes:

When base station configurating terminal device is downlink transfer pattern, described module 401 is set, is used for arranging end The SRS that end equipment sends is the SRS through precoding；When base station configurating terminal device is uplink transmission mode Time, described module 401 is set, for arranging the SRS that SRS is non-precoded that terminal unit sends；

Or, when base station configurating terminal device is downlink transfer pattern 8 or downlink transfer pattern 9 or descending When transmission mode 10 or downlink transfer pattern 11, described module 401 is set, being used for, terminal unit is set and sends out The SRS sent is the SRS through precoding；When base station configurating terminal device be except described downlink transfer pattern 8, During transmission mode outside downlink transfer pattern 9, downlink transfer pattern 10 and downlink transfer pattern 11, institute State and module 401 is set, for arranging the SRS that SRS is non-precoded that terminal unit sends.

When base station uses descending control signaling form 2B or descending control signaling form 2C or descending control When the descending control signaling triggering terminal equipment of signaling format 2D sends SRS, described module 401 is set, The SRS sent for arranging terminal unit is the SRS through precoding；When base station uses descending control signaling The descending control signaling of form 0 or descending control signaling format 4 or descending control signaling form 1A triggers When terminal unit sends SRS, described arranging module 401, the SRS sent for arranging terminal unit is non- The SRS of precoding；

Or, when base station use descending control signaling form 2B or descending control signaling form 2C or under Row controls the descending control signaling triggering terminal equipment of signaling format 2D or descending control signaling form 1A and sends out When sending SRS, described arranging module 401, the SRS sent for configurating terminal device is through precoding SRS；When base station uses descending control signaling form 0 or the descending control signaling of descending control signaling format 4 When triggering terminal equipment sends SRS, described module 401 is set, for arranging the SRS that terminal unit sends SRS for non-precoded.

When base station be 1 to the quantity of terminal equipment configuration uplink/downlink transmission block or only one of which up/ When downstream transmission blocks enables, described module 401 is set, for arranging SRS that terminal unit sends for passing through The SRS of precoding；When base station is 2 or two to the quantity of terminal equipment configuration uplink/downlink transmission block When uplink/downlink transmission block all enables, described module 401 is set, for arranging the SRS that terminal unit sends SRS for non-precoded.

In the embodiment of the present invention, described precoding enable instruction includes: antenna port, scrambler ID and layer During the joint instructions information counted,

Antenna port, scrambler ID and the connection of the number of plies in the descending control signaling of terminal equipment configuration when base station Close high 1 value of instruction information when being 0 or 1, described module 401 is set, be used for arranging terminal unit The SRS sent is the SRS through precoding；

Antenna port, scrambler ID and the connection of the number of plies in the descending control signaling of terminal equipment configuration when base station Close high 1 value of instruction information when being 1 or 0, described module 401 is set, be used for arranging terminal unit The SRS that SRS is non-precoded sent.

In the embodiment of the present invention, described arranging module 401, being additionally operable to by high-rise RRC signaling is described end End equipment arranges cycle and the information of sub-frame offset of described precoding SRS.

In the embodiment of the present invention, described precoding enable instruction includes: the instruction of pre-coding matrix index During information,

When pre-coding matrix index from base station to terminal equipment configuration indicate pre-coding matrix be unit battle array time, Described module 401 is set, sends the SRS of non-precoded for arranging terminal unit；

The pre-coding matrix indicated to the pre-coding matrix index of terminal equipment configuration when base station is non-unity battle array Time, described module 401 is set, sends the SRS through precoding for arranging terminal unit.

The embodiment of the present invention additionally provides a kind of terminal unit, as it is shown in figure 5, described terminal unit 50 includes: Receiver module 501 and process sending module 502；Wherein,

Described receiver module 501, for receiving the configuration information of the SRS that base station issues, and is forwarded to described Process sending module；

Described process sending module 502, for sending the SRS of precoding according to the configuration information of described SRS Or do not carry out the SRS of precoding；

Wherein, described precoding enable instruction includes:

In the embodiment of the present invention,

Described process sending module 502, the precoding in the configuration information determining described SRS enables and refers to Show when information instruction enables, described SRS to be sent is carried out precoding, and transmission prelists to described base station The SRS of code；

Determine when the instruction of the precoding enable instruction in the configuration information of described SRS does not enables, to described Base station sends the SRS not carrying out precoding.

Described process sending module 502, is used for determining when described terminal unit is configured to downlink transfer pattern, Send the SRS through precoding；Determine when described terminal unit is configured to uplink transmission mode, send non- The SRS of precoding；

Or, be used for determining described terminal unit be configured to downlink transfer pattern 8 or downlink transfer pattern 9, Or when downlink transfer pattern 10 or downlink transfer pattern 11, send the SRS through precoding；Determine institute State terminal unit to be configured to except described downlink transfer pattern 8, downlink transfer pattern 9, downlink transfer pattern 10 and downlink transfer pattern 11 outside transmission mode time, send non-precoded SRS.

Described process sending module 502, receives, for described terminal unit, the triggering transmission SRS that base station sends Descending control signaling form 2B or descending control signaling form 2C or descending control signaling form 2D During descending control signaling, send the SRS through precoding；Described terminal unit receives the triggering that base station sends Send the descending control signaling form 0 of SRS or descending control signaling format 4 or descending control signaling lattice During the descending control signaling of formula 1A, send the SRS of non-precoded；

Or, receive, for described terminal unit, the descending control signaling lattice triggering transmission SRS that base station sends Formula 2B or descending control signaling form 2C or descending control signaling form 2D or descending control signaling lattice During the descending control signaling of formula 1A, send the SRS through precoding；Described terminal unit receives base station and sends out That send triggers descending control signaling form 0 or the descending control of descending control signaling format 4 sending SRS During signaling, send the SRS of non-precoded.

Described process sending module 502, for determining the uplink/downlink biography of described terminal unit that base station configure When the quantity of defeated piece is 1 or only one of which uplink/downlink transmission block enables, send through precoding SRS；Determine that the quantity of the uplink/downlink transmission block of the described terminal unit that base station configures is 2 or two When uplink/downlink transmission block all enables, send the SRS of non-precoded.

Described process sending module 502, antenna port in the descending control signaling that terminal unit receives, When high 1 value of the joint instructions information of scrambler ID and the number of plies is 0 or 1, send through precoding SRS；Antenna port, scrambler ID and the joint instructions of the number of plies in the descending control signaling that terminal unit receives When high 1 value of information is 1 or 0, send the SRS of non-precoded.

In the embodiment of the present invention, described process sending module 502, it is additionally operable to determine the transmission SRS that base station is arranged When the subframe index of subframe meets the relation between described instruction precoding SRS cycle and sub-frame offset, send SRS through precoding；Otherwise, the SRS of non-precoded is sent.

Described process sending module 502, for determining the base station pre-coding matrix index to terminal equipment configuration When the pre-coding matrix of instruction is unit battle array, send the SRS of non-precoded；Determine that base station is joined to terminal unit When the pre-coding matrix of the pre-coding matrix index instruction put is non-unity battle array, send the SRS through precoding.

The embodiment of the present invention additionally provides the transmission system of a kind of measuring reference signals SRS, and this system includes: Base station 40 mentioned above and terminal unit 50.

Below in conjunction with the specific embodiment of several different scenes, present invention is described.

Embodiment one

In the present embodiment, base station issues the configuration information of SRS to user terminal, and wherein, this configuration is believed Breath includes: whether described SRS carries out the precoding enable instruction of precoding for instruction；Its In, downlink transfer pattern is relevant to precoding enable instruction, it may be assumed that described precoding enables instruction letter Breath includes downlink transfer pattern.

Or, when base station configurating terminal device is downlink transfer pattern 8 or downlink transfer pattern 9 or descending When transmission mode 10 or downlink transfer pattern 11, then the SRS of terminal unit transmission is set for through prelisting The SRS of code；When base station configurating terminal device be except described downlink transfer pattern 8, downlink transfer pattern 9, under During transmission mode outside row transmission mode 10 and downlink transfer pattern 11, then arrange what terminal unit sent SRS is the SRS of non-precoded；

If precoding to be carried out, then according to precoding information entrained inside descending control signaling (Precoding Matrix Index, referred to as PMI) carries out precoding；Or according to the last time transmission or The precoding information of nearest corresponding descending control signaling carries out precoding；Or according in described configuration information Precoding information carry out precoding；Or, UE by measure in downlink reference signal for channel The proprietary reference signal (CRS) of the reference signal (CSI-RS) of status information and/or community obtains Down channel, and predict up channel by channel reciprocity, described up channel is carried out singular value and divides Solution obtains left singular matrix, right singular matrix and diagonal matrix, selects the strange of maximum from right singular matrix Column vector corresponding to different value carries out precoding as pre-coding matrix to SRS.

Descending control signaling in the present embodiment be format 4 or format 2B or format 2C or Format 2D or format 2E.

When the instruction of described precoding enable instruction enables, described user terminal is to described in be sent SRS carries out precoding, and the SRS after described base station sends precoding；Enable at described precoding and refer to Show when information instruction does not enables, send the described SRS not carrying out precoding to described base station.

Embodiment two

The sending method of the measuring reference signals provided in the present embodiment is by including base station and user terminal System realize.Wherein,

Described base station, is used for triggering user terminal and sends measuring reference signals, and issue to user terminal Send the configuration information of described measuring reference signals；

Above-mentioned configuration information includes one or more instruction information following: the precoding of measuring reference signals makes The precoding information of information, measuring reference signals can be indicated.

Described user terminal, for sending measuring reference signals according to the configuration information obtained to base station.

In the present embodiment, base station issue to user terminal send the configuration information of measuring reference signals can be by Configure according to mode shown in Fig. 6:

For SRS aperiodic, then it is configured to be not required to through precoding；

For cycle SRS, base station is that user terminal configuration user terminal is proprietary by high-rise RRC signaling The SRS cycle and the cycle of precoding SRS, wherein, the cycle of precoding SRS is that user terminal is special The integral multiple in some SRS cycles.In the subframe of cycle SRS, when subframe index meets precoding SRS When cycle and sub-frame offset relation, such as: meet (10 n_f+k_SRS-T_offset)modT_SRS=0 relation time, then send out Send the SRS of precoding, otherwise, send the SRS without precoding.Wherein, n_fFor system frame number, k_SRSFor the subframe index number in frame, T_offsetFor sub-frame offset, T_SRSCycle for precoding SRS.Base station Can be according to the scene residing for user terminal, channel conditions, translational speed etc. because of usually allocating pre-coding The cycle of SRS and the value of sub-frame offset.

In the present embodiment, the precoding enable instruction of above-mentioned measuring reference signals, it is used for indicating measurement Reference signal precoding to be carried out.

In the present embodiment, if precoding to be carried out, then according to entrained inside above-mentioned descending control signaling Precoding information carry out precoding；Or according to last time transmission or nearest corresponding descending control signaling Precoding information carries out precoding；Or carry out precoding according to the precoding information in above-mentioned configuration information； Or, UE is by measuring the reference signal for channel condition information in downlink reference signal (CSI-RS) and/or the proprietary reference signal (CRS) in community obtains down channel, and by letter Road reciprocity prediction up channel, described up channel is carried out singular value decomposition obtain left singular matrix, Right singular matrix and diagonal matrix, select the column vector corresponding to singular value of maximum from right singular matrix As pre-coding matrix, SRS is carried out precoding.

In the present embodiment, above-mentioned descending control signaling be equally format 4 or format 2B or Format 2C or format 2D or format 2E.

Embodiment three

In the present embodiment, base station issues the configuration information of SRS to user terminal, and wherein, this configuration is believed Breath includes: the precoding for indicating described terminal unit whether described SRS carries out precoding enables Instruction information, described precoding enable instruction includes: the cycle of instruction precoding SRS and subframe The information of biasing, described base station is that described terminal unit arranges described precoding by high-rise RRC signaling The cycle of SRS and the information of sub-frame offset.

Base station arrange transmissions SRS subframe on, when subframe index meet the precoding SRS cycle with During relation between sub-frame offset, such as: meet (10 n_f+k_SRS-T_offset)modT_SRSThe relation of=0, or full Foot (k_SRS-T_offset,1) relation of mod5=0, then terminal unit sends the SRS of precoding；Otherwise, send without Cross the SRS of precoding.

Wherein, n_fFor system frame number, k_SRSFor the subframe index number in frame, T_offsetFor sub-frame offset, T_SRS Cycle for precoding SRS.Base station can be according to the scene residing for user terminal, channel conditions, shifting Dynamic speed etc. are because of cycle of usually allocating pre-coding SRS and the value of sub-frame offset.

FDD and TDD system, described precoding SRS cycle and sub-frame offset configuration are referred to Tables 1 and 2.

Precoding SRS cycle and sub-frame offset that table 1 user terminal is proprietary configure (FDD system)

Precoding SRS cycle and sub-frame offset that table 2 user terminal is proprietary configure (TDD system)

Embodiment four

In the present embodiment, base station issues the configuration information of SRS to user terminal, and wherein, this configuration is believed Breath includes: whether described SRS carries out the precoding enable instruction of precoding for instruction；Its In, descending control signaling form is relevant to precoding enable instruction, it may be assumed that described precoding enables and refers to Show that information includes descending control signaling form.

Or, when base station use descending control signaling form 2B or descending control signaling form 2C or The descending control signaling triggering terminal of descending control signaling form 2D or descending control signaling form 1A sets When preparation send SRS, then the SRS that base station configurating terminal device sends is the SRS through precoding；When Base station uses the descending control signaling of descending control signaling form 0 or descending control signaling format 4 to trigger When terminal unit sends SRS, then base station arranges the SRS that SRS is non-precoded that terminal unit sends；

Embodiment five

In the present embodiment, base station issues the configuration information of SRS to user terminal, and wherein, this configuration is believed Breath includes: whether described SRS carries out the precoding enable instruction of precoding for instruction；Its In, the quantity of transmission block is relevant to precoding enable instruction, it may be assumed that described precoding enables instruction letter Breath includes the transmission block quantity of terminal unit.

When base station is 1 to the quantity of terminal equipment configuration uplink/downlink transmission block or only one of which is up When/downstream transmission blocks enables, then the SRS arranging terminal unit transmission is the SRS through precoding；When Base station is 2 or two uplink/downlink transmission to the quantity of terminal equipment configuration uplink/downlink transmission block When block all enables, then the SRS that SRS is non-precoded that terminal unit sends is set；

Embodiment six

In the present embodiment, base station issues the configuration information of SRS to user terminal, and wherein, this configuration is believed Breath includes: whether described SRS carries out the precoding enable instruction of precoding for instruction；Its In, the joint instructions information of the antenna port of user, scrambler ID (identity, identity) and the number of plies with Precoding enable instruction is correlated with, it may be assumed that described precoding enable instruction includes: antenna port, The joint instructions information of scrambler ID and the number of plies.

Antenna port, scrambler ID and the number of plies in the descending control signaling of terminal equipment configuration when base station High 1 value of joint instructions information when being 0 or 1, then arranging the SRS that terminal unit sends is SRS through precoding；When base station antenna port in the descending control signaling of terminal equipment configuration, When high 1 value of the joint instructions information of scrambler ID and the number of plies is 1 or 0, then terminal unit is set The SRS that SRS is non-precoded sent；

When the instruction of described precoding enable instruction enables, described user terminal is to described in be sent SRS carries out precoding, and the SRS after described base station sends precoding；Instruction is enabled at described precoding When information instruction does not enables, send the described SRS not carrying out precoding to described base station.

Embodiment seven

In the present embodiment, base station issues the configuration information of SRS, wherein, this configuration information bag to user terminal Include: for instruction, whether described SRS is carried out the precoding enable instruction of precoding；Wherein, prelist The instruction information of code matrix index is relevant to described precoding enable instruction, it may be assumed that described precoding enables Instruction information includes: the instruction information of pre-coding matrix index.

When the pre-coding matrix of pre-coding matrix index instruction is unit battle array, it is 2 transmitting antennas corresponding Unit matrix

\frac{1}{\sqrt{2}} [\begin{matrix} 1 & 0 \\ 0 & 1 \end{matrix}]

Or 4 launch unit matrix corresponding to antenna

\frac{1}{2} [\begin{matrix} 1 & 0 & 0 & 0 \\ 0 & 1 & 0 & 0 \\ 0 & 0 & 1 & 0 \\ 0 & 0 & 0 & 1 \end{matrix}]

Time, then terminal unit is set and sends The SRS that SRS is non-precoded；When the pre-coding matrix of pre-coding matrix index instruction is non-unity battle array, The SRS that SRS is precoding that terminal unit sends then is set.

If precoding to be carried out, then carry out precoding according to the instruction information of pre-coding matrix index.

Embodiment eight

In the present embodiment, base station issues the configuration information of SRS, wherein, this configuration information bag to user terminal Include: for instruction, whether described SRS is carried out the precoding enable instruction of precoding.Precoding enables Instruction information includes:

Matrix is then used through precoding when precoding enable instruction is designated as SRS SRS is carried out precoding, wherein, R_INFor the covariance matrix of interference plus noise, η is base station and user sets Standby predefined parameter, ()^TRepresent the transposition taking matrix.

Base station receives the SRS after precoding, measures and obtains up equivalent channel, then passes through channel reciprocity Obtain descending equivalent channel, when subscriber equipment uses matrixWhen being filtered receiving downstream signal, then may be used With the descending interference plus noise of albefaction, such that it is able to increase downlink transmission capacity, and then it is whole to have reached raising system The effect of body performance.

By described above, it is seen that the embodiment of the present invention can realize user terminal transmission and have passed through precoding SRS, by enabling control and transmission mode or descending control signaling form or transmission block by the precoding of SRS The joint instructions information binding of quantity or antenna port scrambler ID and the number of plies, solves SRS precoding and enables The problem controlled, saves the expense of downlink signaling, thus realizes more effective SRS precoding and send, joint Save SRS multiplexed resource, reduce the SRS interference to adjacent area, and then reached to improve the effect of systematic entirety energy Really.

Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter Calculation machine program product.Therefore, the present invention can use hardware embodiment, software implementation or combine software and The form of the embodiment of hardware aspect.And, the present invention can use and wherein include calculating one or more The computer-usable storage medium of machine usable program code (includes but not limited to disk memory and optical storage Device etc.) form of the upper computer program implemented.

The present invention is with reference to method, equipment (system) and computer program according to embodiments of the present invention Flow chart and/or block diagram describe.It should be understood that can be by computer program instructions flowchart and/or side Flow process in each flow process in block diagram and/or square frame and flow chart and/or block diagram and/or the knot of square frame Close.Can provide these computer program instructions to general purpose computer, special-purpose computer, Embedded Processor or The processor of other programmable data processing device is to produce a machine so that by computer or other can The instruction that the processor of programming data processing equipment performs produces for realizing in one flow process or multiple of flow chart The device of the function specified in flow process and/or one square frame of block diagram or multiple square frame.

These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing device In the computer-readable memory worked in a specific way so that be stored in this computer-readable memory Instruction produces the manufacture including command device, and this command device realizes at one flow process of flow chart or multiple stream The function specified in journey and/or one square frame of block diagram or multiple square frame.

These computer program instructions also can be loaded in computer or other programmable data processing device, makes Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.

The above, only presently preferred embodiments of the present invention, it is not intended to limit the protection model of the present invention Enclose.

Claims

1. the sending method of measuring reference signals SRS, it is characterised in that the method includes:

Wherein, described precoding enable instruction includes:

Method the most according to claim 1, it is characterised in that described precoding enable instruction bag When including downlink transfer pattern, described base station arranges the configuration information of SRS, including:

Method the most according to claim 1, it is characterised in that described precoding enable instruction bag When including descending control signaling form, described base station arranges the configuration information of SRS, including:

Method the most according to claim 1, it is characterised in that described precoding enable instruction bag When including the transmission block quantity of terminal unit, described base station arranges the configuration information of SRS, including:

Method the most according to claim 1, it is characterised in that described precoding enable instruction bag Include: during the joint instructions information of antenna port, scrambler ID and the number of plies, described base station arranges the configuration of SRS Information, including:

Method the most according to claim 1, it is characterised in that described precoding enable instruction is also Including: the cycle of instruction precoding SRS and the information of sub-frame offset.

Method the most according to claim 6, it is characterised in that described base station arranges the configuration of SRS Information, also includes:

Method the most according to claim 1, it is characterised in that described precoding enable instruction is also Including: the instruction information of pre-coding matrix index.

Method the most according to claim 8, it is characterised in that described precoding enable instruction bag Include: during the instruction information of pre-coding matrix index, described base station arranges the configuration information of SRS, including:

10. the sending method of measuring reference signals SRS, it is characterised in that the method includes:

Wherein, described precoding enable instruction includes:

11. methods according to claim 10, it is characterised in that described terminal unit is according to described The configuration information of SRS sends the SRS of precoding or does not carries out the SRS of precoding, including:

12. methods according to claim 10, it is characterised in that described precoding enable instruction During including downlink transfer pattern,

13. methods according to claim 10, it is characterised in that described precoding enable instruction During including descending control signaling form,

14. methods according to claim 10, it is characterised in that described precoding enable instruction During including the transmission block quantity of terminal unit,

15. methods according to claim 10, it is characterised in that described precoding enable instruction During including the joint instructions information of antenna port, scrambler ID and the number of plies,

16. methods according to claim 10, it is characterised in that described precoding enable instruction Also include: the cycle of instruction precoding SRS and the information of sub-frame offset.

17. methods according to claim 16, it is characterised in that join described in described terminal unit foundation Confidence breath sends the SRS of precoding or does not carries out the SRS of precoding, including:

18. methods according to claim 10, it is characterised in that described precoding enable instruction Also include: the instruction information of pre-coding matrix index.

19. methods according to claim 18, it is characterised in that described precoding enable instruction During including the instruction information of pre-coding matrix index,

20. 1 kinds of base stations, it is characterised in that described base station includes: module and sending module are set；Wherein,

Described precoding enable instruction includes:

21. base stations according to claim 20, it is characterised in that described precoding enable instruction During including downlink transfer pattern,

When base station configurating terminal device is downlink transfer pattern, described module is set, being used for, terminal is set and sets The SRS that preparation is sent is the SRS through precoding；When base station configurating terminal device is uplink transmission mode, Described module is set, for arranging the SRS that SRS is non-precoded that terminal unit sends；

Or, when base station configurating terminal device is downlink transfer pattern 8 or downlink transfer pattern 9 or descending When transmission mode 10 or downlink transfer pattern 11, described module is set, being used for, terminal unit is set and sends SRS be the SRS through precoding；When base station configurating terminal device be except described downlink transfer pattern 8, During transmission mode outside downlink transfer pattern 9, downlink transfer pattern 10 and downlink transfer pattern 11, institute State and module is set, for arranging the SRS that SRS is non-precoded that terminal unit sends.

22. base stations according to claim 20, it is characterised in that described precoding enable instruction During including descending control signaling form,

When base station uses descending control signaling form 2B or descending control signaling form 2C or descending control When the descending control signaling triggering terminal equipment of signaling format 2D sends SRS, described module is set, is used for The SRS arranging terminal unit transmission is the SRS through precoding；When base station uses descending control signaling form 0 or descending control signaling format 4 or the descending control signaling triggering terminal of descending control signaling form 1A When equipment sends SRS, described arranging module, the SRS sent for arranging terminal unit is non-precoded SRS；

Or, when base station use descending control signaling form 2B or descending control signaling form 2C or under Row controls the descending control signaling triggering terminal equipment of signaling format 2D or descending control signaling form 1A and sends out When sending SRS, described arranging module, the SRS sent for configurating terminal device is the SRS through precoding； When base station uses the descending control signaling of descending control signaling form 0 or descending control signaling format 4 to trigger When terminal unit sends SRS, described arranging module, the SRS sent for arranging terminal unit is non-prelisting The SRS of code.

23. base stations according to claim 20, it is characterised in that described precoding enable instruction During including the transmission block quantity of terminal unit,

When base station be 1 to the quantity of terminal equipment configuration uplink/downlink transmission block or only one of which up/ When downstream transmission blocks enables, described module is set, for arranging SRS that terminal unit sends for through prelisting The SRS of code；When base station to the quantity of terminal equipment configuration uplink/downlink transmission block be 2 or two up/ When downstream transmission blocks all enables, described arranging module, the SRS sent for arranging terminal unit is non-prelisting The SRS of code.

24. base stations according to claim 20, it is characterised in that described precoding enable instruction Including: during the joint instructions information of antenna port, scrambler ID and the number of plies,

Antenna port, scrambler ID and the connection of the number of plies in the descending control signaling of terminal equipment configuration when base station Close high 1 value of instruction information when being 0 or 1, described module is set, being used for, terminal unit is set and sends SRS be the SRS through precoding；

Antenna port, scrambler ID and the connection of the number of plies in the descending control signaling of terminal equipment configuration when base station Close high 1 value of instruction information when being 1 or 0, described module is set, being used for, terminal unit is set and sends The SRS that SRS is non-precoded.

25. base station according to claim 20, it is characterised in that described precoding enable instruction Also include: the cycle of instruction precoding SRS and the information of sub-frame offset.

26. base stations according to claim 25, it is characterised in that

Described arranging module, being additionally operable to by high-rise RRC signaling is that described terminal unit arranges described precoding The cycle of SRS and the information of sub-frame offset.

27. base stations according to claim 20, it is characterised in that described precoding enable instruction Also include: the instruction information of pre-coding matrix index.

28. base stations according to claim 27, it is characterised in that described precoding enable instruction During including the instruction information of: pre-coding matrix index,

When pre-coding matrix index from base station to terminal equipment configuration indicate pre-coding matrix be unit battle array time, Described module is set, sends the SRS of non-precoded for arranging terminal unit；

The pre-coding matrix indicated to the pre-coding matrix index of terminal equipment configuration when base station is non-unity battle array Time, described module is set, sends the SRS through precoding for arranging terminal unit.

29. 1 kinds of terminal units, it is characterised in that described terminal unit includes: receiver module and place's haircut Send module；Wherein,

Wherein, described precoding enable instruction includes:

30. terminal units according to claim 29, it is characterised in that

Described process sending module, the precoding in the configuration information determining described SRS enables instruction letter When breath instruction enables, described SRS to be sent is carried out precoding, and sends precoding to described base station SRS；

31. terminal units according to claim 29, it is characterised in that described precoding enables instruction When information includes downlink transfer pattern,

Described process sending module, is used for determining when described terminal unit is configured to downlink transfer pattern, sends out The SRS of precoding is crossed in the warp let-off；Determine when described terminal unit is configured to uplink transmission mode, send non-pre- The SRS of coding；

32. terminal units according to claim 29, it is characterised in that described precoding enables instruction When information includes descending control signaling form,

Described process sending module, receives under the triggering transmission SRS that base station sends for described terminal unit Row controls the descending of signaling format 2B or descending control signaling form 2C or descending control signaling form 2D When controlling signaling, send the SRS through precoding；Described terminal unit receives the triggering transmission that base station sends The descending control signaling form 0 of SRS or descending control signaling format 4 or descending control signaling form 1A Descending control signaling time, send non-precoded SRS；

33. terminal units according to claim 29, it is characterised in that described precoding enables instruction When information includes the transmission block quantity of terminal unit,

Described process sending module, for determining the uplink/downlink transmission block of described terminal unit that base station configures Quantity be 1 or time only one of which uplink/downlink transmission block enables, send through the SRS of precoding； Determine the quantity of the uplink/downlink transmission block of the described terminal unit that base station configures be 2 or two up/ When downstream transmission blocks all enables, send the SRS of non-precoded.

34. terminal units according to claim 29, it is characterised in that described precoding enables instruction When information includes the joint instructions information of antenna port, scrambler ID and the number of plies,

Described process sending module, antenna port in the descending control signaling that terminal unit receives, disturbs When high 1 value of the joint instructions information of code ID and the number of plies is 0 or 1, send the SRS through precoding； The joint instructions information of antenna port, scrambler ID and the number of plies in the descending control signaling that terminal unit receives When high 1 value is 1 or 0, send the SRS of non-precoded.

35. terminal units according to claim 29, it is characterised in that described precoding enables instruction Information also includes: the cycle of instruction precoding SRS and the information of sub-frame offset.

36. terminal units according to claim 35, it is characterised in that

Described process sending module, is additionally operable to determine that the subframe index of the transmission SRS that base station arranges meets During relation between described instruction precoding SRS cycle and sub-frame offset, send the SRS through precoding； Otherwise, the SRS of non-precoded is sent.

37. terminal units according to claim 29, it is characterised in that described precoding enables instruction Information also includes: the instruction information of pre-coding matrix index.

38. according to the terminal unit described in claim 37, it is characterised in that described precoding enables instruction When information includes the instruction information of pre-coding matrix index,

Described process sending module, for determining that base station indicates to the pre-coding matrix index of terminal equipment configuration Pre-coding matrix when being unit battle array, send the SRS of non-precoded；Determine that base station is to terminal equipment configuration When the pre-coding matrix of pre-coding matrix index instruction is non-unity battle array, send the SRS through precoding.

The transmission system of 39. 1 kinds of measuring reference signals SRS, it is characterised in that this system includes: right Require the base station according to any one of 20-28 and the terminal unit according to any one of claim 29-38.