CN101867403B - The multi-antenna sending method of a kind of measuring reference signals, terminal - Google Patents

The multi-antenna sending method of a kind of measuring reference signals, terminal Download PDF

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CN101867403B
CN101867403B CN201010208795.7A CN201010208795A CN101867403B CN 101867403 B CN101867403 B CN 101867403B CN 201010208795 A CN201010208795 A CN 201010208795A CN 101867403 B CN101867403 B CN 101867403B
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srs
antenna
resource
mode
terminal
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CN101867403A (en
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王瑜新
朱鹏
郝鹏
梁春丽
喻斌
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ZTE Corp
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ZTE Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

The invention provides the multi-antenna sending method of a kind of measuring reference signals, including: obtain the antenna sending mode of terminal, measure the transmission of reference signal (SRS) according to antenna sending mode.The present invention also provides for a kind of terminal, is used for obtaining antenna sending mode, measures the transmission of reference signal (SRS) according to antenna sending mode.

Description

The multi-antenna sending method of a kind of measuring reference signals, terminal
Technical field
The present invention relates to the communications field, especially relate to the multi-antenna sending method of a kind of measuring reference signals (SoundingReferenceSignal, referred to as SRS), terminal and base station.
Background technology
Long Term Evolution (LongTermEvolution, referred to as LTE) uplink physical channel of system includes Physical Random Access Channel (PhysicalRandomAccessChannel, referred to as PRACH), Physical Uplink Shared Channel (Physicaluplinksharedchannel, referred to as PUSCH), Physical Uplink Control Channel (Physicaluplinkcontrolchannel, referred to as PUCCH).Wherein, PUSCH has Cyclic Prefix (CyclicPrefix two kinds different, referred to as CP) length, it is general cyclic prefix (NormalCyclicPrefix respectively, referred to as NormalCP) and extended cyclic prefix (ExtendedCyclicPrefix, referred to as ExtendedCP).Each transmission subframe (Subframe) of PUSCH is made up of two time slots (Slot).For different circulating prefix-lengths, location is different in subframe for demodulated reference signal (DemodulationReferenceSignal, referred to as DMRS).Fig. 1 is the time-domain position schematic diagram of the demodulated reference signal according to prior art.As shown in Figure 1, each subframe includes two DMRS symbols, wherein, when Fig. 1 (a) is to adopt general cyclic prefix, the schematic diagram of DMRS time-domain position, each subframe contains 14 OFDM (OrthogonalFrequencyDivisionMultiplexing, referred to as OFDM) symbol, including DMRS symbol, OFDM symbol represents the time-domain position of a subframe, when Fig. 1 (b) is for adopting extended cyclic prefix, the schematic diagram of DMRS time-domain position, each subframe includes the OFDM symbol of 12 time domains.
In LTE, Physical Downlink Control Channel (PDCCH) is used for carrying uplink and downlink schedule information and uplink power control information.Downlink Control Information (DownlinkControlInformation, referred to as DCI) form (format) be divided into DCIformat0,1,1A, 1B, 1C, 1D, 2,2A, 3,3A etc..Base station (e-Node-B, referred to as eNB) Downlink Control Information configurating terminal device (UserEquipment can be passed through, referred to as UE), or the configuration of terminal unit acceptance high-rise (higherlayers), configure UE also referred to as by high-level signaling.
SRS is for measuring the signal of radio channel information (ChannelStateInformation, referred to as CSI) between a kind of terminal unit and base station.In long evolving system, the parameter such as bandwidth, frequency domain position, sequence cyclic shift, cycle and sub-frame offset that UE indicates according to eNB, timing sends uplink SRS on last data symbol sending subframe.ENB judges the up CSI of UE according to the SRS received, and carries out the operations such as frequency domain selection scheduling, close-loop power control according to the CSI obtained.
In LTE system, the SRS sequence that UE sends is by Glycine tomentella sequenceIt is circulated what displacement α obtained in time domain.Same root sequence is carried out different cyclic shift α, it becomes possible to obtain different SRS sequences, and mutually orthogonal between these SRS sequences obtained, therefore, it can that these SRS sequences are distributed to different UE and use, to realize the CDMA between UE.In LTE system, 8 cyclic shift α of SRS sequence definition, provided by equation below (1):
α = 2 π n SRS cs 8 ... formula (1)
Wherein,Indicated by the signaling of 3bit, be called the cyclic shift (CS, cyclicshift) of SRS, respectively 0,1,2,3,4,5,6 and 7.It is to say, under same running time-frequency resource, the UE in community has 8 available code resources, and eNB can configure at most 8 UE and send SRS on identical running time-frequency resource simultaneously.Formula (1) is considered as in time domain, SRS sequence is divided into 8 parts at equal intervals, but owing to SRS sequence length is the multiple of 12, so the minimum length of SRS sequence is 24.
In LTE system, the frequency domain bandwidth of SRS adopts tree to configure.The corresponding tree structure of each SRS band width configuration (SRSbandwidthconfiguration), the SRS bandwidth (SRS-Bandwidth) of top (or being called ground floor) to should the maximum SRS bandwidth of SRS band width configuration, or be called SRS bandwidth range.Table 1 to table 4 gives the SRS band width configuration in different uplink SRS bandwidth range, whereinResource Block (RB, ResourceBlock) quantity corresponding to uplink SRS bandwidth.
Table 1SRS band width configuration
Table 2SRS band width configuration
Table 3SRS band width configuration
Table 4SRS band width configuration
With SRS band width configuration index 1, i.e. C in table 1SRSThe tree structure of SRS bandwidth is illustrated by=1 for example, BSRS=0 is 0 layer, is the top of tree structure, and the SRS bandwidth of this layer is the bandwidth corresponding to 32 RB, is the maximum SRS bandwidth of SRS band width configuration 1；BSRS=1 is 1 layer, and the SRS bandwidth of this layer is the bandwidth corresponding to 16 RB, and a SRS bandwidth of last layer, namely 0 layer splits into the SRS bandwidth of 21 layer；BSRS=2 is 2 layers, and the SRS bandwidth of this layer is the bandwidth corresponding to 8 RB, and a SRS bandwidth of last layer, namely 1 layer splits into the SRS bandwidth of 22 layers；BSRS=3 is 3 layers, and the SRS bandwidth of this layer is the bandwidth corresponding to 4 RB, and a SRS bandwidth of last layer, namely 2 layer splits into the SRS bandwidth of 23 layers, and its tree structure is as shown in Figure 2.
UE indicates according to the signaling of base station, after calculating the SRS bandwidth obtaining self, further according to the eNB top signaling frequency domain position n sentRRCDetermine that self sends the frequency domain initial position of SRS.Fig. 3 is the distribution difference n of prior artRRCUE send the frequency domain initial position schematic diagram of SRS, as it is shown on figure 3, be assigned with different nRRCUE by community SRS bandwidth zones of different send SRS, wherein, UE1 is according to nRRC=0 determines the frequency initial position sending SRS, and UE2 is according to nRRC=3 determine the frequency initial position sending SRS, and UE3 is according to nRRC=4 determine the frequency initial position sending SRS, and UE4 is according to nRRC=6 determine the frequency initial position sending SRS.
The sequence that SRS uses is selected from demodulation pilot frequency sequence group, when the SRS bandwidth of UE is 4 Resource Block (ResourceBlock, referred to as RB) time, the computer using length to be 2 RB generates the sequence of (ComputerGenerated, referred to as CG)；When the SRS band of UE is wider than 4 RB, use the Zadoff-Chu sequence of corresponding length.
Additionally, in same SRS bandwidth, the subcarrier (sub-carrier) of SRS is that interval is placed, that is, the transmission of SRS adopts pectinate texture, the quantity of the frequency comb (frequencycomb) in LTE system is 2, and the repeat factor value (RePetitionFactor, referred to as RPF) also corresponding to time domain is 2.Fig. 4 is the pectinate texture schematic diagram of the SRS of prior art, as shown in Figure 4, when each UE sends SRS, only uses in two frequency comb, comb=0 or comb=1.So, the UE instruction according to the top signaling of 1 bit, the subcarrier only using frequency domain index to be even number or odd number sends 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 passes through code division multiplexing and sends SRS, it is also possible to two UE, in different frequency comb, send SRS by frequency division multiplexing.For example, in LTE system, the UE of SRS is sent in certain SRS bandwidth (4 RB), operable cyclic shift has 8, operable frequency comb is 2, and UE always has 16 resources that can be used to send SRS thus, say, that, in this SRS bandwidth, 16 SRS can be sent at most simultaneously.Owing to not supporting uplink single user multiple-input and multiple-output (SingleUserMultipleInputMultipleOutput in LTE system, referred to as SU-MIMO), UE can only have an antenna to send SRS in each moment, so a UE has only to a SRS resource, therefore, in above-mentioned SRS bandwidth, system at most can 16 UE of concurrent multiplexing.
Senior LTE (LTE-Advanced, referred to as LTE-A) system is the evolution system of future generation of LTE system, at up support SU-MIMO, and 4 antennas can be used at most as up transmitting antenna.It is to say, UE can send SRS at synchronization on many antennas simultaneously, and eNB needs to estimate the state on every channel according to the SRS received on every antenna.But in some cases, antenna gain imbalance (AGI is there is between the terminal antenna of such as LTE-A, AntennaGainImbalance), or when the terminal of LTE-A is linked into LTE network, terminal then can adopt the sending mode of single antenna, and namely terminal only uses 1 antenna to send SRS at synchronization.Or, the terminal of 4 antennas can select 2 antennas to send SRS, and how terminal effectively selects antenna to send SRS, is a problem to be solved.
The research of existing LTE-A proposes: in uplink communication, it should use the SRS of non-precoded (namely antenna is proprietary).Now, as the UE SRS using multiple antennas to send non-precoded, the SRS resource required for each UE can increase, and has also resulted in system and can the UE quantity of concurrent multiplexing decline.Additionally, send SRS except retaining LTE original cycle (periodic), it is also possible to configure UE aperiodic (aperiodic) by Downlink Control Information or high-level signaling and send SRS.
Such as, in certain SRS bandwidth (4 RB), if each UE uses 4 antennas to send SRS simultaneously, then the orthogonal resource number required for each UE is exactly 4.SRS resource number according to can be supported by said one SRS bandwidth is total up to 16, then in this SRS bandwidth, it is possible to the UE number of multiplexing is just reduced to 4.In system can the number of users of concurrent multiplexing by for the 1/4 of original LTE.
Again owing to proposing in the demand of LTE-A, the number of users that lte-a system can be held should no less than LTE system, so this demand just and when above-mentioned multiple antennas sends SRS number of users decline actually caused contradiction.How to be more effectively each transmitting antenna distribution SRS orthogonal resource of UE, save resource overhead, improve resource utilization, be a problem to be solved.
Summary of the invention
The technical problem to be solved in the present invention is to provide the multi-antenna sending method of a kind of measuring reference signals, terminal and base station.
In order to solve the problems referred to above, the invention provides the multi-antenna sending method of a kind of measuring reference signals, including:
Obtain the antenna sending mode of terminal, measure the transmission of reference signal (SRS) according to antenna sending mode.
Wherein, when terminal is under single antenna sending mode, the transmission of described measuring reference signals includes:
When it line options does not enable, described terminal sends measuring reference signals on fixing antenna；
The same day line options enable and terminal support 4 transmitting antennas time, described terminal is a (n in antenna indexSRS) antenna on send n-thSRSIndividual measuring reference signals, wherein, antenna index a (nSRS) determine according to following manner:
When SRS does not enable in the frequency hopping of frequency domain,
a(nSRS)=nSRSMod4；
When SRS enables in the frequency hopping of frequency domain,
Wherein It is 1, Nb′Branch's number that when distributing for SRS bandwidth tree structure, b ' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
Wherein, when 2 transmitting antennas of terminal support and be under single antenna sending mode, or, terminal supports 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and terminal need to select one of which transmitting antenna measurement reference signal send time, the transmission of described measuring reference signals includes:
Described terminal is a (n in antenna index or group indexSRS) antenna or antenna sets on send n-thSRSIndividual measuring reference signals, wherein, antenna index or group index a (nSRS) determine according to following manner:
SRS when the frequency hopping of frequency domain does not enable, a (nSRS)=nSRSMod2；
SRS frequency domain frequency hopping enable time,
Wherein It is 1, Nb′Branch's number that when distributing for SRS bandwidth tree structure, b ' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
Wherein, when described terminal is under multiple antennas sending mode, the transmission of described measurement reference signal includes: described terminal obtains the orthogonal resource on each antenna of base station distribution for emission measurement reference signal, and the described orthogonal resource on each antenna sends measuring reference signals.
Wherein, described orthogonal resource is distributed to described each antenna by described base station by the resource distribution mode of one or more combinations in code division multiplexing (CDM), time division multiplex (TDM) and frequency division multiplexing (FDM).
Wherein, described by CDM resource distribution mode distribute orthogonal resource include distributing orthogonal code domain resource by CDM mode；Described by TDM resource distribution mode distribute orthogonal resource include distributing orthogonal time-domain resource by TDM mode；Described by FDM resource distribution mode distribute orthogonal resource include distributing orthogonal frequency domain resource by FDM mode；Described code domain resource is: the cyclic shift of root sequence and/or root sequence；Described time-domain resource is: subframe position or sub-frame offset；Described frequency domain resource is: frequency band and/or frequency comb.
Wherein, for period measurement reference signal, adopting CDM is orthogonal resource described in described each antenna assignment in conjunction with TDM resource distribution mode.
Wherein, for measuring reference signals aperiodic, adopting CDM is orthogonal resource described in described each antenna assignment in conjunction with the resource distribution mode of FDM.
Wherein, when terminal supports 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and terminal selects one of which transmitting antenna when carrying out emission measurement reference signal, adopting CDM or FDM resource distribution mode is the orthogonal resource for emission measurement reference signal of each antenna assignment in this group transmitting antenna.
Wherein, described terminal directly obtains on described each antenna for sending the described orthogonal resource of described measuring reference signals from high-level signaling or descending control signaling；Or, described terminal is used for sending the described orthogonal resource of described measuring reference signals from high-level signaling or descending control signaling on obtaining portion divided antenna, implicit mapping relations in conjunction with resource distribution mode and configuration, it is determined that for sending the described orthogonal resource of measuring reference signals on each antenna.
Wherein, described terminal obtains resource distribution mode according to following manner:
Obtain from high-level signaling or descending control signaling；
Or, determine described resource distribution mode according to the measuring reference signals cycle that user terminal is proprietary；
Or, according to whether measuring reference signals determines described resource distribution mode in Frequency Hopping.
Wherein, the described measuring reference signals cycle proprietary according to user terminal determines that described resource distribution mode includes:
When the described measuring reference signals cycle more than threshold value M time, use CDM or FDM resource distribution mode, otherwise adopt TDM, or TDM is in conjunction with CDM, or TDM is in conjunction with the resource distribution mode of FDM, described M be certain integer between 5 to 320 and be 5 multiple, unit is millisecond.
Wherein, described according in Frequency Hopping, whether measuring reference signals determines that described resource distribution mode includes:
When Frequency Hopping does not enable, use the resource distribution mode of TDM；When Frequency Hopping enables, use the resource distribution mode of CDM or FDM.
Wherein, when using CDM resource distribution mode, or when CDM resource distribution mode is combined into described each antenna assignment orthogonal resource with other resource distribution modes, cyclic shift (CS) margin maximization of each antenna should be made.
Wherein, CS resource is distributed as follows:
nCs, i=(α nCs, j+i·N/Tx)modN
Wherein, i is antenna port index, α=± 1, nCs, jSending, for known antenna port j, the cyclic shift that measuring reference signals uses, N is the total quantity of cyclic shift, TxFor sending the antenna amount of measuring reference signals simultaneously, i=0,1 ..., Tx-1, j=0,1 ..., Tx-1。
Wherein, the antenna sending mode of described terminal refers to the antenna sending mode of Physical Uplink Shared Channel or Physical Uplink Control Channel or measuring reference signals, by high-level signaling or descending control signaling, described terminal judges that antenna sending mode is single antenna sending mode or multiple antennas sending mode.
The present invention also provides for a kind of terminal, wherein: described terminal is used for obtaining antenna sending mode, measures the transmission of reference signal (SRS) according to antenna sending mode.
Wherein, described terminal is used for: when being under single antenna sending mode:
When it line options does not enable, fixing antenna sends measuring reference signals；
The same day line options enable and terminal support 4 transmitting antennas time, be a (n in antenna indexSRS) antenna on send n-thSRSIndividual measuring reference signals, wherein, antenna index a (nSRS) determine according to following manner:
When SRS does not enable in the frequency hopping of frequency domain,
a(nSRS)=nSRSMod4；
When SRS enables in the frequency hopping of frequency domain,
Wherein It is 1, Nb′Branch's number that when distributing for SRS bandwidth tree structure, b ' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
Wherein, described terminal is used for: when it supports 2 transmitting antennas and is under single antenna sending mode, or, support 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and when one of which transmitting antenna measurement reference signal need to be selected to send:
It is a (n in antenna index or group indexSRS) antenna or antenna sets on send n-thSRSIndividual measuring reference signals, wherein, antenna index or group index a (nSRS) determine according to following manner:
SRS when the frequency hopping of frequency domain does not enable, a (nSRS)=nSRSMod2；
SRS frequency domain frequency hopping enable time,
Wherein It is 1, Nb′Branch's number that when distributing for SRS bandwidth tree structure, b ' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
Wherein, described terminal be for: when being under multiple antennas sending mode, obtain for the orthogonal resource of emission measurement reference signal on each antenna of base station distribution, the described orthogonal resource on each antenna send measuring reference signals.
Wherein, described orthogonal resource is distributed to described each antenna by described base station by the resource distribution mode of one or more combinations in code division multiplexing (CDM), time division multiplex (TDM) and frequency division multiplexing (FDM).
Wherein, described by CDM resource distribution mode distribute orthogonal resource include distributing orthogonal code domain resource by CDM mode；Described by TDM resource distribution mode distribute orthogonal resource include distributing orthogonal time-domain resource by TDM mode；Described by FDM resource distribution mode distribute orthogonal resource include distributing orthogonal frequency domain resource by FDM mode；Described code domain resource is: the cyclic shift of root sequence and/or root sequence；Described time-domain resource is: subframe position or sub-frame offset；Described frequency domain resource is: frequency band and/or frequency comb.
Wherein, described terminal be for: directly obtain from high-level signaling or descending control signaling on described each antenna for sending the described orthogonal resource of described measuring reference signals；Or, for sending the described orthogonal resource of described measuring reference signals on obtaining portion divided antenna from high-level signaling or descending control signaling, implicit mapping relations in conjunction with resource distribution mode and configuration, it is determined that for sending the described orthogonal resource of measuring reference signals on each antenna.
Wherein, described terminal is for obtaining resource distribution mode according to following manner:
Described resource distribution mode is obtained from high-level signaling or descending control signaling；
Or, determine described resource distribution mode according to the measuring reference signals cycle that user terminal is proprietary；
Or, according to whether measuring reference signals determines described resource distribution mode in Frequency Hopping.
Wherein, described terminal is for obtaining resource distribution mode according to following manner:
When the described measuring reference signals cycle more than threshold value M time, use CDM or FDM resource distribution mode, otherwise adopt TDM, or TDM is in conjunction with CDM, or TDM is in conjunction with the resource distribution mode of FDM, described M be certain integer between 5 to 320 and be 5 multiple, unit is millisecond.
Wherein, described terminal is for obtaining resource distribution mode according to following manner:
When Frequency Hopping does not enable, use the resource distribution mode of TDM；When Frequency Hopping enables, use the resource distribution mode of CDM or FDM.
Wherein, the antenna sending mode of described terminal refers to the antenna sending mode of Physical Uplink Shared Channel or Physical Uplink Control Channel or measuring reference signals, and described terminal is for judging that antenna sending mode is single antenna sending mode or multiple antennas sending mode by high-level signaling or descending control signaling.
The present invention also provides for a kind of base station, described base station is for distributing orthogonal resource to described each antenna by the resource distribution mode of one or more combinations in code division multiplexing (CDM), time division multiplex (TDM) and frequency division multiplexing (FDM), so that described each antenna sends measuring reference signals on described orthogonal resource.
Wherein, described base station is used for: for period measurement reference signal, and adopting CDM is orthogonal resource described in described each antenna assignment in conjunction with TDM resource distribution mode.
Wherein, described base station is used for: for measuring reference signals aperiodic, and adopting CDM is orthogonal resource described in described each antenna assignment in conjunction with the resource distribution mode of FDM.
Wherein, described base station is used for: when described terminal supports 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and terminal selects one of which transmitting antenna when carrying out emission measurement reference signal, adopting CDM or FDM resource distribution mode is the orthogonal resource for emission measurement reference signal of each antenna assignment in this group transmitting antenna.
Wherein, described base station is used for: when using CDM resource distribution mode, or when CDM resource distribution mode is combined into described each antenna assignment orthogonal resource with other resource distribution modes, should make cyclic shift (CS) margin maximization of each antenna.
Wherein, described base station is used for: distribution CS resource as follows:
nCs, i=(α nCs, j+i·N/Tx)modN
Wherein, i is antenna port index, α=± 1, nCs, jSending, for known antenna port j, the cyclic shift that measuring reference signals uses, N is the total quantity of cyclic shift, TxFor sending the antenna amount of measuring reference signals simultaneously, i=0,1 ..., Tx-1, j=0,1 ..., Tx-1。
Pass through the present invention, terminal adopts the transmission mode of sky line options to send SRS, solve single antenna pattern in the lte-a system of prior art or the SRS under double antenna pattern sends problem, propose the multiple antennas allocative decision of SRS resource simultaneously, under the premise saving resource overhead, ensure the channel measurement performance of SRS.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the time-domain position schematic diagram of the demodulated reference signal of prior art；
Fig. 2 is the tree structure schematic diagram of SRS bandwidth；
Fig. 3 is the distribution difference n of prior artRRCUE send SRS frequency domain initial position schematic diagram；
Fig. 4 is the pectinate texture schematic diagram of the SRS of prior art.
Detailed description of the invention
The present invention provides the multi-antenna sending method of a kind of measuring reference signals, including:
Obtain the antenna sending mode of terminal, carry out the transmission of SRS according to antenna sending mode.
Wherein, antenna sending mode refers to the antenna sending mode of physical uplink channel channel or Physical Uplink Control Channel or measuring reference signals, be likely single antenna sending mode or multiple antennas sending mode, by high-level signaling or descending control, terminal judges that antenna sending mode is single antenna sending mode or multiple antennas sending mode.
Wherein, under single antenna sending mode, selecting an antenna, base station can be passed through high-level signaling or descending control signaling and configure 1 SRS resource to terminal, and terminal this SRS resource on this antenna of this selection sends SRS；Under multiple antennas sending mode, the orthogonal resource for emission measurement reference signal is distributed in base station on each antenna, terminal obtains the orthogonal resource on each antenna of base station distribution for emission measurement reference signal, and the described orthogonal resource on each antenna sends measuring reference signals.
It is further illustrated below under the selection mode of antenna under single antenna sending mode and multiple antennas sending mode the method for salary distribution of orthogonal resource.
(1) present invention provides a kind of SRS antenna selecting method under single antenna sending mode, including:
1), when the same day, line options did not enable, terminal sends SRS on certain fixing root antenna；
2) when line options on the same day enables,
A) if this terminal can support at most 2 transmitting antennas, then adopt following mode to carry out day line options and send SRS:
SRS when the frequency hopping of frequency domain does not enable, antenna index a (nSRS) computing formula be: a (nSRS)=nSRSMod2；
SRS frequency domain frequency hopping enable time, antenna index a (nSRS) computing formula be:
Wherein No matter NbTake what value,It is all 1, NbBranch's number that when distributing for SRS bandwidth tree structure, b layer is corresponding, as shown in table 1 to table 4, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
When terminal can be supported at most 4 transmission antennas but only have selected 2 antennas in 4 antennas, with 2 antennas for one group, it is divided into two groups, if antenna 0 and antenna 2 are one group, antenna 1 and antenna 3 are one group, or combination in any, select one group of antenna to send SRS from two groups, equally possible the process described above, it may be assumed that
When terminal supports 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and when terminal need to select one of which transmitting antenna measurement reference signal to send, antenna sets index a (nSRS) determine according to following manner:
SRS when the frequency hopping of frequency domain does not enable, a (nSRS)=nSRSMod2；
SRS frequency domain frequency hopping enable time,
Wherein It is 1, Nb′Branch's number that when distributing for SRS bandwidth tree structure, b ' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
B) if this terminal can support at most 4 transmitting antennas, then adopt following mode to carry out day line options and send:
SRS when the frequency hopping of frequency domain does not enable, antenna index a (nSRS) computing formula be:
a(nSRS)=nSRSMod4；
SRS frequency domain frequency hopping enable time, antenna index a (nSRS) computing formula be:
Wherein No matter NbTake what value,It is all 1, Nb′Branch's number that when distributing for SRS bandwidth tree structure, b layer is corresponding, as shown in table 1 to table 4, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
Tube terminal can not support at most 2 transmitting antennas or 4 transmitting antennas, under single antenna sending mode, synchronization terminal only uses 1 antenna to send SRS, therefore synchronization terminal only takes up 1 SRS resource, and base station can be passed through high-level signaling or descending control signaling and configure 1 SRS resource to terminal.Described SRS resource is including at least one of following information: root sequence and/or the cyclic shift of root sequence, subframe position or sub-frame offset, frequency band and/or frequency comb.
Further, high-level signaling or descending control signaling are passed through in base station, and the terminal of configuration multiple antennas adopts single antenna sending mode or multiple antennas sending mode.
(2) present invention also provides for a kind of SRS distribution SRS resource method under multiple antennas sending mode, including:
The resource distribution mode combined by code division multiplexing (CDM) or time division multiplex (TDM) or frequency division multiplexing (FDM) or any of the above is the resource that different antennae distribution is orthogonal, and each antenna sends SRS (referring generally to uplink SRS) in orthogonal resource.
Further, described is that different antennae distributes orthogonal resource by CDM mode, including: by the orthogonal code domain resource that CDM mode is different antennae distribution transmission uplink SRS；
Described is that different antennae distributes orthogonal resource by TDM mode, including: by the orthogonal time-domain resource that TDM mode is different antennae distribution transmission uplink SRS；
Described is that different antennae distributes orthogonal resource by FDM mode, including: by the orthogonal frequency domain resource that FDM mode is different antennae distribution transmission uplink SRS；
Described is the orthogonal resource of different antennae distribution by CDM in conjunction with the mode of TDM, including: it is the orthogonal code domain resource that different antennae distribution sends uplink SRS by CDM mode, and is the orthogonal time-domain resource that different antennae distribution sends uplink SRS by TDM mode；
Described is the orthogonal resource of different antennae distribution by TDM in conjunction with the mode of FDM, including: it is the orthogonal time-domain resource that different antennae distribution sends uplink SRS by TDM mode, and is the orthogonal frequency domain resource that different antennae distribution sends uplink SRS by FDM mode.
Further, described code domain resource is: the cyclic shift of root sequence and/or root sequence；Described time-domain resource is: subframe position or sub-frame offset；Described frequency domain resource is: frequency band and/or frequency comb.
Further, for cycle SRS, adopting CDM is the orthogonal resource of different antennae distribution in conjunction with the mode of TDM, or to adopt TDM be the orthogonal resource of different antennae distribution in conjunction with the mode of FDM.
Further, for SRS aperiodic, the mode adopting CDM or FDM is that different antennae distributes orthogonal resource.
Further, when terminal supports 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and terminal selects one of which transmitting antenna when carrying out emission measurement reference signal, adopting CDM or FDM resource distribution mode is the orthogonal resource for emission measurement reference signal of each antenna assignment in this group transmitting antenna.Such as, when terminal can be supported at most 4 transmission antennas but only have selected 2 antennas in 4 antennas, with 2 antennas for one group, it is divided into two groups, if antenna 0 and antenna 2 are one group, antenna 1 and antenna 3 are one group, or combination in any, select one group of antenna to send SRS from two groups, adopt 2 recited above to launch the system of selection selecting 1 transmitting antenna；It is send 2 antenna assignment orthogonal resources of SRS by the mode of CDM or FDM simultaneously.
Further, by high-level signaling or descending control signaling, base station (eNB) notifies that each antenna of terminal unit (UE) sends the resource of uplink SRS, terminal directly obtains on described each antenna for sending the described orthogonal resource of described measuring reference signals from high-level signaling or descending control signaling；Or, eNB sends the resource of uplink SRS by high-level signaling or descending control signaling notice UE some antennas, in conjunction with the implicit mapping relations of resource distribution mode and configuration, UE determines that each antenna sends the resource of SRS.Wherein, terminal is configured by high-level signaling or descending control signaling by described resource distribution mode by base station；Or, UE determines described resource distribution mode according to the measuring reference signals cycle that user terminal is proprietary, is specifically shown in described in method one；Or, UE, according to whether measuring reference signals determines described resource distribution mode in Frequency Hopping, is specifically shown in described in method two.Implicit mapping relations include: when CDM mode, and implicit mapping relations refer at the CS determining other antennas according to the principle of CS margin maximization, or by mode that base station and terminal are made an appointment；When FDM mode, such as first frequency comb of some antennas, and terminal to have received the resource distribution mode of base station instruction be FDM, then by second frequency comb on other antennas, etc..
Method one:
The length in the SRS cycle according to user terminal proprietary (UE-specific) configures the SRS resource method of salary distribution.Long when the cycle of configuration, during more than certain threshold value M, then use the mode of CDM or FDM to configure resource；TDM or the TDM mode combining CDM or TDM combination FDM is otherwise adopted to configure resource.Wherein M be certain integer between 5 to 320 and be 5 multiple, unit is millisecond (ms).
Method two:
According to whether SRS configures the SRS resource method of salary distribution in Frequency Hopping (hopping).When Frequency Hopping does not enable (Hoppingdisabled), such as work as bhop≥BSRSTime, then use the mode of TDM；When Frequency Hopping enables (Hoppingenabled), such as work as bhop< BSRSTime, then use the mode of CDM or FDM.
Further, when the resource distribution mode used includes the mode of CDM, namely CDM resource distribution mode is used, or when CDM resource distribution mode and other resource distribution modes are combined into described each antenna assignment orthogonal resource, the CS margin maximization of each antenna should be made, such as adopt equation below to distribute CS resource:
nCs, i=(α nCs, j+i·N/Tx)modN
Wherein, i is antenna port index, α=± 1, nCs, jSending, for known antenna port j, the cyclic shift that uplink SRS uses, N is the total quantity of cyclic shift, TxFor sending the antenna amount of SRS simultaneously, i=0,1 ..., Tx-1, j=0,1 ..., Tx-1。
Further, high-level signaling or descending control signaling are passed through in base station, and the terminal of configuration multiple antennas adopts single antenna sending mode or multiple antennas sending mode.
Below with reference to accompanying drawing and describe the present invention in detail in conjunction with the embodiments.It should be noted that when not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
Below in conjunction with preferred embodiment, the present embodiment is described in detail.
Example one
When the terminal being configured with multiple antennas only has 1 antenna to send SRS at synchronization, when namely this terminal is under single antenna sending mode,
When the same day, line options did not enable, terminal sends SRS on certain fixing root antenna；
When the same day, line options enabled,
A) if this terminal can support at most 2 transmitting antennas, then adopt following mode to carry out day line options and send SRS:
SRS when the frequency hopping of frequency domain does not enable, antenna index a (nSRS) computing formula be: a (nSRS)=nSRSMod2；
SRS frequency domain frequency hopping enable time, antenna index a (nSRS) computing formula be:
Wherein No matter NbTake what value,It is all 1, NbBranch's number that when distributing for SRS bandwidth tree structure, b layer is corresponding, as shown in table 1 to table 4, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
When terminal can be supported at most 4 transmission antennas but only have selected 2 antennas in 4 antennas, with 2 antennas for one group, it is divided into two groups, if antenna 0 and antenna 2 are one group, antenna 1 and antenna 3 are one group, or combination in any, selects one group of antenna to send SRS, equally possible the process described above from two groups.
Further, high-level signaling or descending control signaling are passed through in base station, and the terminal of configuration multiple antennas adopts single antenna sending mode or multiple antennas sending mode.
Example two
When the terminal being configured with multiple antennas only has 1 antenna to send SRS at synchronization, when namely this terminal is under single antenna sending mode:
When the same day, line options did not enable, terminal sends SRS on certain fixing root antenna；
When the same day, line options enabled,
1) if this terminal can support at most 4 transmitting antennas, then adopt following mode to carry out day line options and send:
SRS when the frequency hopping of frequency domain does not enable, antenna index a (nSRS) computing formula be: a (nSRS)=nSRSMod4；
SRS frequency domain frequency hopping enable time, antenna index a (nSRS) computing formula be:
Wherein No matter NbTake what value,It is all 1, NbBranch's number that when distributing for SRS bandwidth tree structure, b layer is corresponding, as shown in table 1 to table 4, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
Further, high-level signaling or descending control signaling are passed through in base station, and the terminal of configuration multiple antennas adopts single antenna sending mode or multiple antennas sending mode.
Example three
The mode combined by code division multiplexing (CDM) or time division multiplex (TDM) or frequency division multiplexing (FDM) or any of the above is the resource that different antennae distribution is orthogonal, and each antenna sends uplink SRS in orthogonal resource.
Further, terminal is configured by high-level signaling or descending control signaling by described resource distribution mode by base station；
Further, for before the resource that different antennae distribution is orthogonal, by high-level signaling or descending control signaling, base station (eNB) notifies that each antenna of terminal unit (UE) sends the resource of uplink SRS；Or, eNB sends resource and the resource distribution mode of uplink SRS by high-level signaling or descending control signaling notice UE some antennas, according to the implicit mapping relations of configuration, UE determines that each antenna sends the resource of SRS.
Further, described is that different antennae distributes orthogonal resource by CDM mode, including: by the orthogonal code domain resource that CDM mode is different antennae distribution transmission uplink SRS；
Described is that different antennae distributes orthogonal resource by TDM mode, including: by the orthogonal time-domain resource that TDM mode is different antennae distribution transmission uplink SRS；
Described is that different antennae distributes orthogonal resource by FDM mode, including: by the orthogonal frequency domain resource that FDM mode is different antennae distribution transmission uplink SRS；
Described is the orthogonal resource of different antennae distribution by CDM in conjunction with the mode of TDM, including: by the orthogonal code domain resource that CDM mode is different antennae distribution transmission uplink SRS, and/or it is the orthogonal time-domain resource that different antennae distribution sends uplink SRS by TDM mode；
Described is the orthogonal resource of different antennae distribution by TDM in conjunction with the mode of FDM, including: by the orthogonal time-domain resource that TDM mode is different antennae distribution transmission uplink SRS, and/or it is the orthogonal frequency domain resource that different antennae distribution sends uplink SRS by FDM mode；
Further, described code domain resource is: the cyclic shift of root sequence and/or root sequence；Described time-domain resource is: subframe position or sub-frame offset；Described frequency domain resource is: frequency band and/or frequency comb；
Further, for cycle SRS, adopting CDM is the orthogonal resource of different antennae distribution in conjunction with the mode of TDM, or to adopt TDM be the orthogonal resource of different antennae distribution in conjunction with the mode of FDM；
Further, for SRS aperiodic, the mode adopting CDM or FDM is that different antennae distributes orthogonal resource；
Further, when terminal can be supported at most 4 transmission antennas but only have selected 2 antennas in 4 antennas, with 2 antennas for one group, it is divided into two groups, if antenna 0 and antenna 2 are one group, antenna 1 and antenna 3 are one group, or combination in any, select one group of antenna to send SRS from two groups, adopt 2 recited above to launch the system of selection selecting 1 transmitting antenna；It is send 2 antenna assignment orthogonal resources of SRS by the mode of CDM or FDM simultaneously.
Further, high-level signaling or descending control signaling are passed through in base station, and the terminal of configuration multiple antennas adopts single antenna sending mode or multiple antennas sending mode.
Further, when base station does not have high-level signaling or descending control signaling that the SRS resource method of salary distribution of terminal is configured, terminal can configure the SRS resource of multiple antennas by two kinds of following methods:
Method one: configure the SRS resource method of salary distribution according to the length in the SRS cycle of user terminal proprietary (UE-specific).Long when the cycle of configuration, during more than certain threshold value M, then use the mode of CDM or FDM to configure resource；TDM or the TDM mode combining CDM or TDM combination FDM is otherwise adopted to configure resource.Wherein M be certain integer between 5 to 320 and be 5 multiple, unit is millisecond (ms).
Method two: according to whether SRS configures the SRS resource method of salary distribution in Frequency Hopping (hopping).When Frequency Hopping does not enable (Hoppingdisabled), such as work as bhop≥BSRSTime, then use the mode of TDM；When Frequency Hopping enables (Hoppingenabled), such as work as bhop< BSRSTime, then use the mode of CDM or FDM.
Further, when the resource distribution mode used includes the mode of CDM, the CS margin maximization of each antenna should be made, such as adopt equation below to distribute CS resource:
nCs, i=(α nCs, j+i·N/Tx)modN
Wherein, i is antenna port index, α=± 1, nCS, jSending, for known antenna port j, the cyclic shift that uplink SRS uses, N is the total quantity of cyclic shift, TxFor sending the antenna amount of SRS simultaneously, i=0,1 ..., Tx-1, j=0,1 ..., Tx-1
The present invention also provides for a kind of terminal, wherein: described terminal is used for obtaining antenna sending mode, measures the transmission of reference signal (SRS) according to antenna sending mode.
Wherein, described terminal is used for: when being under single antenna sending mode:
When it line options does not enable, fixing antenna sends measuring reference signals；
The same day line options enable and terminal support 4 transmitting antennas time, be a (n in antenna indexSRS) antenna on send n-thSRSIndividual measuring reference signals, wherein, antenna index a (nSRS) determine according to following manner:
When SRS does not enable in the frequency hopping of frequency domain,
a(nSRS)=nSRSMod4；
When SRS enables in the frequency hopping of frequency domain,
Wherein It is 1, Nb′Branch's number that when distributing for SRS bandwidth tree structure, b ' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
Wherein, described terminal is used for: when it supports 2 transmitting antennas and is under single antenna sending mode, or, support 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and when one of which transmitting antenna measurement reference signal need to be selected to send:
It is a (n in antenna index or group indexSRS) antenna or antenna sets on send n-thSRSIndividual measuring reference signals, wherein, antenna index or group index a (nSRS) determine according to following manner:
SRS when the frequency hopping of frequency domain does not enable, a (nSRS)=nSRSMod2；
SRS frequency domain frequency hopping enable time,
Wherein It is 1, Nb′Branch's number that when distributing for SRS bandwidth tree structure, b ' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
Wherein, described terminal be for: when being under multiple antennas sending mode, obtain for the orthogonal resource of emission measurement reference signal on each antenna of base station distribution, the described orthogonal resource on each antenna send measuring reference signals.
Wherein, described orthogonal resource is distributed to described each antenna by described base station by the resource distribution mode of one or more combinations in code division multiplexing (CDM), time division multiplex (TDM) and frequency division multiplexing (FDM).
Wherein, described by CDM resource distribution mode distribute orthogonal resource include distributing orthogonal code domain resource by CDM mode；Described by TDM resource distribution mode distribute orthogonal resource include distributing orthogonal time-domain resource by TDM mode；Described by FDM resource distribution mode distribute orthogonal resource include distributing orthogonal frequency domain resource by FDM mode；Described code domain resource is: the cyclic shift of root sequence and/or root sequence；Described time-domain resource is: subframe position or sub-frame offset；Described frequency domain resource is: frequency band and/or frequency comb.
Wherein, described terminal be for: directly obtain from high-level signaling or descending control signaling on described each antenna for sending the described orthogonal resource of described measuring reference signals；Or, for sending the described orthogonal resource of described measuring reference signals on obtaining portion divided antenna from high-level signaling or descending control signaling, implicit mapping relations in conjunction with resource distribution mode and configuration, it is determined that for sending the described orthogonal resource of measuring reference signals on each antenna.
Wherein, described terminal is for obtaining resource distribution mode according to following manner:
Described resource distribution mode is obtained from high-level signaling or descending control signaling；
Or, determine described resource distribution mode according to the measuring reference signals cycle that user terminal is proprietary；
Or, according to whether measuring reference signals determines described resource distribution mode in Frequency Hopping.
Wherein, described terminal is for obtaining resource distribution mode according to following manner:
When the described measuring reference signals cycle more than threshold value M time, use CDM or FDM resource distribution mode, otherwise adopt TDM, or TDM is in conjunction with CDM, or TDM is in conjunction with the resource distribution mode of FDM, described M be certain integer between 5 to 320 and be 5 multiple, unit is millisecond.
Wherein, described terminal is for obtaining resource distribution mode according to following manner:
When Frequency Hopping does not enable, use the resource distribution mode of TDM；When Frequency Hopping enables, use the resource distribution mode of CDM or FDM.
Wherein, the antenna sending mode of described terminal refers to the antenna sending mode of Physical Uplink Shared Channel or Physical Uplink Control Channel or measuring reference signals, and described terminal is for judging that antenna sending mode is single antenna sending mode or multiple antennas sending mode by high-level signaling or descending control signaling.
The present invention also provides for a kind of base station, described base station is for distributing orthogonal resource to described each antenna by the resource distribution mode of one or more combinations in code division multiplexing (CDM), time division multiplex (TDM) and frequency division multiplexing (FDM), so that described each antenna sends measuring reference signals on described orthogonal resource.
Wherein, described base station is used for: for period measurement reference signal, and adopting CDM is orthogonal resource described in described each antenna assignment in conjunction with TDM resource distribution mode.
Wherein, described base station is used for: for measuring reference signals aperiodic, and adopting CDM is orthogonal resource described in described each antenna assignment in conjunction with the resource distribution mode of FDM.
Wherein, described base station is used for: when described terminal supports 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and terminal selects one of which transmitting antenna when carrying out emission measurement reference signal, adopting CDM or FDM resource distribution mode is the orthogonal resource for emission measurement reference signal of each antenna assignment in this group transmitting antenna.
Wherein, described base station is used for: when using CDM resource distribution mode, or when CDM resource distribution mode is combined into described each antenna assignment orthogonal resource with other resource distribution modes, should make cyclic shift (CS) margin maximization of each antenna.
Wherein, described base station is used for: distribution CS resource as follows:
nCs, i=(α nCs, j+i·N/Tx)modN
Wherein, i is antenna port index, α=± 1, nCs, jSending, for known antenna port j, the cyclic shift that measuring reference signals uses, N is the total quantity of cyclic shift, TxFor sending the antenna amount of measuring reference signals simultaneously, i=0,1 ..., Tx-1, j=0,1 ..., Tx-1。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims (15)

1. the multi-antenna sending method of a measuring reference signals, it is characterised in that including:
Obtain the antenna sending mode of terminal, measure the transmission of reference signal (SRS) according to antenna sending mode；
When terminal is under single antenna sending mode, the transmission of described measuring reference signals includes:
When it line options does not enable, described terminal sends measuring reference signals on fixing antenna；
The same day line options enable and terminal support 4 transmitting antennas time, described terminal is a (n in antenna indexSRS) antenna on send n-thSRSIndividual measuring reference signals, wherein, antenna index a (nSRS) determine according to following manner:
When SRS does not enable in the frequency hopping of frequency domain,
a(nSRS)=nSRSMod4；
When SRS enables in the frequency hopping of frequency domain,
Wherein K = &Pi; b &prime; = b hop B SRS N b &prime; , It is 1, Nb'Branch's number that when distributing for SRS bandwidth tree structure, b' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied；
When described terminal is under multiple antennas sending mode, the transmission of described measurement reference signal includes: described terminal obtains the orthogonal resource on each antenna of base station distribution for emission measurement reference signal, and the described orthogonal resource on each antenna sends measuring reference signals；
Described orthogonal resource is distributed to described each antenna by described base station by the resource distribution mode of one or more combinations in code division multiplexing (CDM), time division multiplex (TDM) and frequency division multiplexing (FDM)；
Described terminal obtains resource distribution mode according to following manner:
Described resource distribution mode is determined according to the measuring reference signals cycle that user terminal is proprietary；
Or, according to whether measuring reference signals determines described resource distribution mode in Frequency Hopping；
Wherein, the described measuring reference signals cycle proprietary according to user terminal determines that described resource distribution mode includes: when the described measuring reference signals cycle more than threshold value M time, use the resource distribution mode of CDM or FDM, otherwise adopt TDM, or TDM is in conjunction with CDM, or TDM is in conjunction with the resource distribution mode of FDM, described M be certain integer between 5 to 320 and be 5 multiple, unit is millisecond；
Described according in Frequency Hopping, whether measuring reference signals determines that described resource distribution mode includes:
When Frequency Hopping does not enable, use the resource distribution mode of TDM；When Frequency Hopping enables, use the resource distribution mode of CDM or FDM.
2. the method for claim 1, it is characterized in that, when 2 transmitting antennas of terminal support and be under single antenna sending mode, or, terminal supports 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and when terminal need to select one of which transmitting antenna measurement reference signal to send, the transmission of described measuring reference signals includes:
Described terminal is a (n in antenna index or group indexSRS) antenna or antenna sets on send n-thSRSIndividual measuring reference signals, wherein, antenna index or group index a (nSRS) determine according to following manner:
SRS when the frequency hopping of frequency domain does not enable, a (nSRS)=nSRSMod2；
SRS frequency domain frequency hopping enable time,
Wherein K = &Pi; b &prime; = b hop B SRS N b &prime; , It is 1, Nb'Branch's number that when distributing for SRS bandwidth tree structure, b' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
3. the method for claim 1, it is characterised in that described by CDM resource distribution mode distribute orthogonal resource include distributing orthogonal code domain resource by CDM mode；Described by TDM resource distribution mode distribute orthogonal resource include distributing orthogonal time-domain resource by TDM mode；Described by FDM resource distribution mode distribute orthogonal resource include distributing orthogonal frequency domain resource by FDM mode；Described code domain resource is: the cyclic shift of root sequence and/or root sequence；Described time-domain resource is: subframe position or sub-frame offset；Described frequency domain resource is: frequency band and/or frequency comb.
4. the method for claim 1, it is characterised in that for period measurement reference signal, adopting CDM is orthogonal resource described in described each antenna assignment in conjunction with TDM resource distribution mode.
5. the method for claim 1, it is characterised in that for measuring reference signals aperiodic, adopting CDM is orthogonal resource described in described each antenna assignment in conjunction with the resource distribution mode of FDM.
6. the method for claim 1, it is characterized in that, when terminal supports 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and terminal selects one of which transmitting antenna when carrying out emission measurement reference signal, adopting CDM or FDM resource distribution mode is the orthogonal resource for emission measurement reference signal of each antenna assignment in this group transmitting antenna.
7. the method for claim 1, it is characterised in that described terminal directly obtains on described each antenna for sending the described orthogonal resource of described measuring reference signals from high-level signaling or descending control signaling；Or, described terminal is used for sending the described orthogonal resource of described measuring reference signals from high-level signaling or descending control signaling on obtaining portion divided antenna, implicit mapping relations in conjunction with resource distribution mode and configuration, it is determined that for sending the described orthogonal resource of measuring reference signals on each antenna.
8. the method for claim 1, it is characterized in that, when using CDM resource distribution mode, or when CDM resource distribution mode is combined into described each antenna assignment orthogonal resource with other resource distribution modes, cyclic shift (CS) margin maximization of each antenna should be made.
9. method as claimed in claim 8, it is characterised in that distribution CS resource as follows:
ncs,i=(α ncs,j+i·N/Tx)modN
Wherein, i is antenna port index, α=± 1, ncs,jSending, for known antenna port j, the cyclic shift that measuring reference signals uses, N is the total quantity of cyclic shift, TxFor sending the antenna amount of measuring reference signals simultaneously, i=0,1 ..., Tx-1, j=0,1 ..., Tx-1。
10. the method for claim 1, it is characterized in that, the antenna sending mode of described terminal refers to the antenna sending mode of Physical Uplink Shared Channel or Physical Uplink Control Channel or measuring reference signals, by high-level signaling or descending control signaling, described terminal judges that antenna sending mode is single antenna sending mode or multiple antennas sending mode.
11. a terminal, it is characterised in that described terminal is used for obtaining antenna sending mode, measure the transmission of reference signal (SRS) according to antenna sending mode；
When being under single antenna sending mode:
When it line options does not enable, fixing antenna sends measuring reference signals；
The same day line options enable and terminal support 4 transmitting antennas time, be a (n in antenna indexSRS) antenna on send n-thSRSIndividual measuring reference signals, wherein, antenna index a (nSRS) determine according to following manner:
When SRS does not enable in the frequency hopping of frequency domain,
a(nSRS)=nSRSMod4；
When SRS enables in the frequency hopping of frequency domain,
Wherein K = &Pi; b &prime; = b hop B SRS N b &prime; , It is 1, Nb'Branch's number that when distributing for SRS bandwidth tree structure, b' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied；
When being under multiple antennas sending mode, obtain the orthogonal resource for emission measurement reference signal on each antenna of base station distribution, the described orthogonal resource on each antenna sends measuring reference signals；
Described orthogonal resource is distributed to described each antenna by described base station by the resource distribution mode of one or more combinations in code division multiplexing (CDM), time division multiplex (TDM) and frequency division multiplexing (FDM)；
Described terminal is for obtaining resource distribution mode according to following manner:
Described resource distribution mode is determined according to the measuring reference signals cycle that user terminal is proprietary；Or,
According to whether measuring reference signals determines described resource distribution mode in Frequency Hopping；
Wherein, the described measuring reference signals cycle proprietary according to user terminal determines that described resource distribution mode includes: when the described measuring reference signals cycle more than threshold value M time, use the resource distribution mode of CDM or FDM, otherwise adopt TDM, or TDM is in conjunction with CDM, or TDM is in conjunction with the resource distribution mode of FDM, described M be certain integer between 5 to 320 and be 5 multiple, unit is millisecond；
Described according in Frequency Hopping, whether measuring reference signals determines that described resource distribution mode includes:
When Frequency Hopping does not enable, use the resource distribution mode of TDM；When Frequency Hopping enables, use the resource distribution mode of CDM or FDM.
12. terminal as claimed in claim 11, it is characterized in that, described terminal is used for: when it supports 2 transmitting antennas and is under single antenna sending mode, or, support 2 groups of transmitting antennas, often group transmitting antenna includes at least 2 transmitting antennas, and when one of which transmitting antenna measurement reference signal need to be selected to send:
It is a (n in antenna index or group indexSRS) antenna or antenna sets on send n-thSRSIndividual measuring reference signals, wherein, antenna index or group index a (nSRS) determine according to following manner:
SRS when the frequency hopping of frequency domain does not enable, a (nSRS)=nSRSMod2；
SRS frequency domain frequency hopping enable time,
Wherein K = &Pi; b &prime; = b hop B SRS N b &prime; , It is 1, Nb'Branch's number that when distributing for SRS bandwidth tree structure, b' layer is corresponding, nSRSFor the transmitting counter of SRS, BSRSFor the SRS bandwidth that user is proprietary, bhopFor the frequency frequency hopping bandwidth that user is proprietary, ∏ is the operation that many numbers are multiplied.
13. terminal as claimed in claim 11, it is characterised in that described distribute orthogonal resource by CDM resource distribution mode and include distributing orthogonal code domain resource by CDM mode；Described by TDM resource distribution mode distribute orthogonal resource include distributing orthogonal time-domain resource by TDM mode；Described by FDM resource distribution mode distribute orthogonal resource include distributing orthogonal frequency domain resource by FDM mode；Described code domain resource is: the cyclic shift of root sequence and/or root sequence；Described time-domain resource is: subframe position or sub-frame offset；Described frequency domain resource is: frequency band and/or frequency comb.
14. terminal as claimed in claim 11, it is characterised in that described terminal be for: directly obtain from high-level signaling or descending control signaling on described each antenna for sending the described orthogonal resource of described measuring reference signals；Or, for sending the described orthogonal resource of described measuring reference signals on obtaining portion divided antenna from high-level signaling or descending control signaling, implicit mapping relations in conjunction with resource distribution mode and configuration, it is determined that for sending the described orthogonal resource of measuring reference signals on each antenna.
15. terminal as claimed in claim 11, it is characterized in that, the antenna sending mode of described terminal refers to the antenna sending mode of Physical Uplink Shared Channel or Physical Uplink Control Channel or measuring reference signals, and described terminal is for judging that antenna sending mode is single antenna sending mode or multiple antennas sending mode by high-level signaling or descending control signaling.
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