WO2011157042A1

WO2011157042A1 - Multi-antenna transmitting method for sounding reference signal, terminal and base station thereof

Info

Publication number: WO2011157042A1
Application number: PCT/CN2010/080437
Authority: WO
Inventors: 王瑜新; 朱鹏; 郝鹏; 梁春丽; 喻斌
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-13
Filing date: 2010-12-29
Publication date: 2011-12-22
Also published as: CN101867403B; CN101867403A

Abstract

A multi-antenna transmitting method for sounding reference signal (SRS) is provided, and the method includes: acquiring the antenna transmission mode of the terminal or the quantity of the SRS antenna port, transmitting the sounding reference signal (SRS) according to the antenna transmission mode of the terminal or the quantity of the SRS antenna port. A terminal is provided as well, and the terminal is used to acquire the antenna transmission mode of the terminal, and transmit the sounding reference signal (SRS) according to the antenna transmission mode of the terminal or the quantity of the SRS antenna port. With the present invention, the problem of the SRS transmission in single antenna mode or in multi-antenna mode in the advanced long-term evolution (LTE-A) system in the prior art is solved, meanwhile a multi-antenna allocation scheme for SRS resource is proposed, and the channel measurement performance of the SRS is guaranteed on the premise of saving resource cost.

Description

Multi-antenna transmitting method, terminal and base station for measuring reference signal

Technical field

The present invention relates to the field of communications, and in particular, to a multi-antenna transmission method, a terminal, and a base station for measuring a Sounding Reference Signal (SRS). Background technique

The uplink physical channel of the Long Term Evolution (LTE) system includes a Physical Random Access Channel (PRACH), a Physical Uplink Shared Channel (PUSCH), and a physical uplink. Control channel (Physical uplink control channel, abbreviated as PUCCH). The PUSCH has two different cyclic prefixes (Cyclic Prefix, CP for short), which are Normal Cyclic Prefix (Normal CP) and Extended Cyclic Prefix (Extended Cyclic Prefix). Each sub-frame of a PUSCH consists of two slots (Slots). For different cyclic prefix lengths, the Demodulation Reference Signal (DMRS) is different in the sub-frame. 1 is a schematic diagram of a time domain position of a demodulation reference signal according to the prior art. As shown in FIG. 1, each subframe includes two DMRS symbols, where FIG. 1(a) is a schematic diagram of DMRS time domain positions when a normal cyclic prefix is used, and each subframe contains 14 orthogonal frequency division multiplexing ( The Orthogonal Frequency Division Multiplexing (OFDM) symbol, including the DMRS symbol, the OFDM symbol represents the time domain position of one subframe, and FIG. 1 (b) is a schematic diagram of the DMRS time domain position when the extended cyclic prefix is used, and each subframe includes 12 time domain OFDM symbols.

In LTE, a physical downlink control channel (PDCCH) is used to carry uplink and downlink scheduling information, and uplink power control information. The Downlink Control Information (DCI) format is divided into DCI format 0, 1, 1A, 1B, 1C, 1D, 2, 2A, 3, 3A, and so on. The base station (e-Node-B, referred to as eNB for short) can configure a terminal device (User Equipment, UE for short) through the downlink control information, or the terminal device accepts a higher layer configuration, which is also configured by using high layer signaling. UE.

SRS is used to measure wireless channel information between a terminal device and a base station (Channel State) Information, referred to as CSI). In the LTE system, the UE sends an uplink SRS on the last data symbol of the transmission subframe according to the bandwidth indicated by the eNB, the frequency domain location, the sequence cyclic shift, the period, and the subframe offset. The eNB determines the uplink CSI of the UE according to the received SRS, and performs operations such as frequency domain selection scheduling, closed loop power control, and the like according to the obtained CSI.

In the LTE system, the SRS sequence sent by the UE is obtained by cyclically shifting a root sequence » in the time domain. By performing different cyclic shifts on the same root sequence, different SRS sequences can be obtained, and The obtained SRS sequences are mutually orthogonal to each other, and therefore, these SRS sequences can be allocated to different UEs to implement code division multiple access between UEs. In the LTE system, the SRS sequence defines eight cyclic shifts α, given by the following formula (1): = 2π ^SRS . Equation (1)

8 where n _RS is indicated by 3-bit signaling, called cyclic shift (CS) of SRS, which are 0, 1, 2, 3, 4, 5, 6, and 7, respectively. That is to say, in the same time-frequency resource, the UE in the cell has 8 available code resources, and the eNB can configure up to 8 UEs to simultaneously send the SRS on the same time-frequency resource. Equation (1) can be regarded as dividing the SRS sequence into 8 parts at equal intervals in the time domain, but since the SRS sequence length is a multiple of 12, the minimum length of the SRS sequence is 24.

In the LTE system, the frequency domain bandwidth of the SRS is configured in a tree structure. Each SRS bandwidth configuration corresponds to a tree structure. The SRS bandwidth of the highest layer (or the first layer) (SRS-Bandwidth) corresponds to the maximum SRS bandwidth of the SRS bandwidth configuration, or SRS bandwidth. range. Tables 1 to 4 show the SRS bandwidth configurations in different uplink SRS bandwidths, where N is the number of resource blocks (RBs) corresponding to the uplink SRS bandwidth.

SRS bandwidth configuration of 6 ≤ N ^ ≤ 40

Table 2 40< ≤60 SRS bandwidth configuration

Table 3 SRS bandwidth configuration of 60 < ≤ 80

Table 4 SRS bandwidth configuration of 80<N^≤110

The tree structure of the SRS bandwidth is described by taking the SRS bandwidth configuration index 1, that is, ^ = 1 in Table 1. The 3⁄4« = 0 is 0 layer, which is the highest layer of the tree structure. The SRS bandwidth of this layer is 32. One The bandwidth corresponding to the RB is the maximum SRS bandwidth of the SRS bandwidth configuration 1; 3⁄4^ = 1 is 1 layer, the SRS bandwidth of this layer is the bandwidth corresponding to 16 RBs, and the upper layer, that is, one SRS of the 0 layer The bandwidth is split into two 1 layer SRS bandwidths; = 2 is 2 layers, the SRS bandwidth of this layer is the bandwidth corresponding to 8 RBs, and the upper layer, that is, the SRS bandwidth of the 1 layer is split into 2 layers. Layer 2 SRS bandwidth; = 3 is 3 layers, the SRS bandwidth of this layer is the bandwidth corresponding to 4 RBs, and the upper layer, that is, the SRS bandwidth of the 2 layers is split into 2 3 layers of SRS bandwidth. Its tree structure is shown in Figure 2.

The UE calculates its own SRS bandwidth according to the signaling indication of the base station, and then determines the initial frequency domain position of the SRS by itself according to the upper layer signaling frequency domain location _Wrrc sent by the eNB. FIG. 3 is a schematic diagram of a frequency domain initial position for transmitting SRSs of different UEs allocated by different UEs in the prior art. As shown in FIG. 3, UEs allocated with different _Wrrcs will send SRS in different areas of the SRS bandwidth of the cell, where UE1 is based on 3⁄4 ^ =0 determines the frequency initial position of the transmitting SRS, UE2 determines the frequency initial position of the transmitting SRS according to _3⁄4 ^=3, UE3 determines the frequency initial position of transmitting the SRS according to _Wrrc =4, and UE4 determines the frequency initial position of transmitting the SRS according to _Wrrc =6 .

The sequence used by the SRS is selected from the demodulation pilot sequence group. When the SRS bandwidth of the UE is 4 Resource Blocks (RBs), it is generated by a computer with a length of 2 RBs (Computer Generated, referred to as A sequence of CG ); when the SRS bandwidth of the UE is greater than 4 RBs, a Zadoff-Chu sequence of a corresponding length is used.

In addition, in the same SRS bandwidth, the sub-carriers of the SRS are placed at intervals, that is, the SRS is transmitted using a comb structure, and the number of frequency combs in the LTE system is used. 2, which also corresponds to the time domain repeat coefficient value (Repetition Factor, RPF for short) is 2. 4 is a schematic diagram of a comb structure of a prior art SRS. As shown in FIG. 4, when each UE sends an SRS, only one of the two frequency combs is used, comb=0 or comb=l. Thus, the UE transmits the SRS using only subcarriers whose frequency domain index is even or odd according to the indication of the upper layer signaling of 1 bit. This comb structure allows more UEs to send SRS within the same SRS bandwidth.

Within the same SRS bandwidth, multiple UEs may use different cyclic shifts on the same frequency comb, and then send SRS through code division multiplexing, or two UEs may be combed on different frequencies and transmitted by frequency division multiplexing. SRS. For example, in an LTE system, a UE that transmits an SRS within a certain SRS bandwidth (4 RBs) can use 8 cyclic shifts and 2 frequency combs that can be used. Therefore, the UE has a total of 16 resources that can be used to transmit SRS, that is, up to 16 SRSs can be simultaneously transmitted within this SRS bandwidth. Since the single-user multiple input multiple output (SU-MIMO) is not supported in the LTE system, the UE can only transmit one SRS at each time, so only one SRS resource is required for one UE. Therefore, within the above SRS bandwidth, the system can simultaneously multiplex up to 16 UEs.

The LTE-Advanced (LTE-A) system is the next-generation advanced system of the LTE system. It supports SU-MIM0 in the uplink and can use up to four antennas as uplink transmitting antennas. That is to say, the UE can simultaneously transmit SRS on multiple antennas at the same time, and the eNB needs to estimate the state on each channel according to the SRS received on each antenna. However, in some cases, such as Antenna Gain Imbalance (AGI) between the terminal antennas of LTE-A, or when the terminal of LTE-A accesses the LTE network, the terminal can use a single antenna. The transmission mode, that is, the terminal transmits SRS using only one antenna at the same time. Alternatively, the terminal of the 4 antenna can select 2 antennas to transmit the SRS, and how to effectively select the antenna to transmit the SRS is a problem to be solved.

In the existing LTE-A study, it is proposed that in uplink communication, non-pre-coded (ie antenna-specific) SRS should be used. At this time, when the UE transmits the non-precoded SRS by using multiple antennas, the SRS resources required by each UE are increased, which causes the number of UEs that can be simultaneously multiplexed in the system to decrease. In addition, in addition to retaining the original LTE periodic transmission SRS, the UE may also be configured to transmit the SRS by aperiodic transmission by using downlink control information or higher layer signaling.

For example, within a certain SRS bandwidth (4 RBs), if each UE uses 4 antennas to simultaneously transmit SRS, then each UE needs 4 orthogonal resources. According to the total number of SRS resources that can be supported in one SRS bandwidth, the number of UEs that can be multiplexed is reduced to four. The number of users that can be simultaneously multiplexed in the system will be 1/4 of the original LTE.

Moreover, due to the demand of LTE-A, the number of users that the LTE-A system can accommodate should be no less than the LTE system, so this requirement is in contradiction with the actual decrease in the number of users when the multi-antenna transmits SRS. How to allocate SRS orthogonal resources to each transmit antenna of the UE more effectively, save resource overhead, and improve resource utilization is a problem to be solved. Summary of the invention

The technical problem to be solved by the present invention is to provide a multi-antenna transmitting method, a terminal and a base station for measuring a reference signal.

In order to solve the above problem, the present invention provides a multi-antenna transmission method for measuring a reference signal, including:

Obtain the antenna transmission mode of the terminal or the number of antenna ports that measure the reference signal, and transmit the measurement reference signal (SRS) according to the antenna transmission mode or the number of antenna ports that measure the reference signal.

Wherein, when the terminal is in the single antenna transmission mode or the number of antenna ports for measuring the reference signal is 1, the sending of the measurement reference signal includes:

When the antenna selection is not enabled, the terminal sends a measurement reference signal on a fixed antenna; when the antenna selection is enabled and the terminal supports 4 transmit antennas, the terminal sends the first measurement reference signal on the antenna with the antenna index , wherein the antenna index is determined as follows:

When the SRS is not enabled in the frequency domain, the frequency hopping is not enabled.

a(w ) = _3⁄4s mod 4 ;

When the SRS is enabled in the frequency domain, the frequency hopping is enabled.

₍ , when K is even

When K is odd

- ₍ When Κ is even ( ^3⁄4

When K is an odd number, where = im ^m ° ^{d4 =} ° , f , is 1, the number of branches corresponding to the 6' layer when the SRS bandwidth tree structure is allocated, ^ is the SRS transmission counter, and 3⁄4^ is the user-specific SRS Bandwidth, . _P is the user-specific frequency hopping bandwidth, and Π is the operation of multiplying multiple numbers. Wherein, when the terminal supports two transmit antennas and is in the single antenna transmission mode or the number of antenna ports for measuring the reference signal is 1, or the terminal supports two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, and the terminal needs Select one of the transmit antennas to transmit the measurement reference signal The sending of the measurement reference signal includes:

The terminal transmits an nth _SRS measurement reference signal on an antenna or an antenna group whose antenna index or group index is, wherein the antenna index or the group index α (3⁄4^ is determined according to the following manner:

When the frequency hopping of the SRS is not enabled, a, n _SRS ) = n _SRS mod 2;

When the SRS is enabled in the frequency domain,

₍ , ― J(3⁄4s+L" ^/2 "+ 3⁄4^") ^mod 2 when it is even

^3⁄4 ₅ mod2 is an odd number where = i ^{m0d4 =} ° , ^3⁄4 is 1, , the number of branches corresponding to the 6 ' layer when assigning the SRS bandwidth tree structure, ^ is the SRS transmit counter, 3⁄4^ is the user-specific SRS bandwidth, . _P is the user-specific frequency hopping bandwidth, and Π is the operation of multiplying multiple numbers. When the terminal is in the multi-antenna transmission mode or the number of the antenna ports of the measurement reference signal is 2 or 4, the transmitting the measurement reference signal includes: the terminal acquiring the antennas allocated by the base station for transmitting the measurement reference. An orthogonal resource of the signal, the measurement reference signal is transmitted on the orthogonal resources on each antenna.

The orthogonal resource is allocated by the base station to each of the resources by a combination of one or more of code division multiplexing (CDM), time division multiplexing (TDM), or frequency division multiplexing (FDM). antenna. Configuring orthogonal code domain resources; allocating orthogonal resources by TDM resource allocation manner includes allocating orthogonal time domain resources by TDM manner; and allocating orthogonal resources by FDM resource allocation manner, including allocating orthogonal frequency domain resources by FDM manner The code domain resource is: a cyclic shift of a root sequence and/or a root sequence; the time domain resource is: a subframe position or a subframe offset; and the frequency domain resource is: a frequency band and/or a frequency comb.

For the periodic measurement reference signal, the orthogonal resources are allocated to the antennas by using CDM and TDM resource allocation.

For the aperiodic measurement reference signal, the orthogonal resources are allocated to the antennas by using a CDM and a FDM resource allocation manner.

Wherein, when the terminal supports two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, And when the terminal selects one of the transmitting antennas to transmit the measurement reference signal, the CDM or FDM resource allocation manner is used to allocate orthogonal resources for transmitting the measurement reference signal to each antenna in the group of transmitting antennas.

The terminal directly obtains, by using the high layer signaling or the downlink control signaling, the orthogonal resources used by the antennas to send the measurement reference signal; or the terminal is configured by a high layer signaling or a downlink control signal. And obtaining, in the partial antenna, the orthogonal resources used to send the measurement reference signal, and determining the orthogonal resources used to send the measurement reference signal on each antenna according to the resource allocation manner and the implicit mapping relationship of the configuration.

The terminal obtains the resource allocation manner according to the following manner:

Obtained from high layer signaling or downlink control signaling;

Or determining the resource allocation manner according to a measurement reference signal period specific to the user terminal; or determining the resource allocation manner according to whether the measurement reference signal is frequency hopping in the frequency domain.

The determining, by the user terminal, the measurement reference signal period, the resource allocation manner includes:

When the measurement reference signal period is greater than the threshold value M, the resource allocation manner of the CDM or the FDM is used, otherwise the TDM is used, or the TDM is combined with the CDM, or the TDM is combined with the FDM resource allocation manner, and the M is 5 to 320. An integer between and is a multiple of 5 in milliseconds.

The determining, according to whether the measurement reference signal is frequency hopping in the frequency domain, determining the resource allocation manner includes:

When the frequency domain hopping is not enabled, the TDM resource allocation mode is used; when the frequency domain hopping is enabled, the CDM or FDM resource allocation mode is used.

When the CDM resource allocation mode is used, or the CDM resource allocation mode is combined with other resource allocation modes to allocate orthogonal resources to the antennas, the cyclic shift (CS) interval of each antenna should be maximized.

Among them, the CS resources are allocated as follows:

n _CS = (o - n _{cs j} + i - N IT _x ) o& N where, for the antenna port index, "=±1, j is the known antenna port j to send the measurement parameters The cyclic shift used by the test signal, ^ is the total number of cyclic shifts, 7; is the number of antennas transmitting the measurement reference signal at the same time, = 0,1,...,7 -1 , j = X... _x -\ _o

The antenna transmission mode of the terminal refers to a physical uplink shared channel or a physical uplink control channel or an antenna transmission mode of a measurement reference signal, and the terminal determines, by using high layer signaling or downlink control signaling, that the antenna transmission mode is single antenna transmission. The mode is also the multi-antenna transmission mode.

The present invention further provides a terminal, wherein: the terminal is configured to: acquire an antenna transmission mode or a number of antenna ports for measuring a reference signal, and perform transmission of a measurement reference signal (SRS) according to an antenna transmission mode.

The terminal is further configured to: when in the single antenna transmission mode or the number of antenna ports for measuring the reference signal is 1:

When the antenna selection is not enabled, the measurement reference signal is sent on the fixed antenna;

When the antenna selection is enabled and the terminal supports 4 transmit antennas, the first measurement reference signal is transmitted on the antenna with the antenna index, wherein the antenna index ^^^) is determined according to the following manner: When the SRS does not have frequency hopping in the frequency domain When enabled, when the SRS is enabled in the frequency domain,

The number of branches corresponding to the 6' layer when the shape structure is allocated, ^ is the transmission counter of the SRS, and the user-specific SRS bandwidth is 3⁄4^. _P is the user-specific frequency hopping bandwidth, and Π is the operation of multiplying multiple numbers. The terminal is configured to: when supporting two transmit antennas and in a single antenna transmission mode, or supporting two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, and one of the transmit antennas needs to be selected. When the measurement reference signal is sent: Sending an nth _SRS measurement reference signal on an antenna or an antenna group with an antenna index or a group index, wherein the antenna index or the group index α^^μ艮 is determined as follows:

When SRS is not enabled in the frequency domain, an _SRS ) = n _SRS mod 2;

SRS in the frequency domain

Where κ = _b , N _bhgp is 1, N _b , is the SRS bandwidth tree, and the number of branches corresponding to the 6' layer of the other Y[N structure allocation, ^ is the SRS transmission counter, and the user-specific SRS bandwidth is 3⁄4^ , . _P is the user-specific frequency hopping bandwidth, and Π is the operation of multiplying multiple numbers. The terminal is further configured to: when the number of antenna ports in the multi-antenna transmission mode or the measurement reference signal is 2 or 4, acquire orthogonal resources for transmitting measurement reference signals on each antenna allocated by the base station, A measurement reference signal is transmitted on the orthogonal resources on the antenna.

The orthogonal resource is allocated by the base station to each of the resources by a combination of one or more of code division multiplexing (CDM), time division multiplexing (TDM), or frequency division multiplexing (FDM). antenna.

Configuring orthogonal code domain resources; allocating orthogonal resources by TDM resource allocation manner includes allocating orthogonal time domain resources by TDM manner; and allocating orthogonal resources by FDM resource allocation manner, including allocating orthogonal frequency domain resources by FDM manner The code domain resource is: a cyclic shift of a root sequence and/or a root sequence; the time domain resource is: a subframe position or a subframe offset; and the frequency domain resource is: a frequency band and/or a frequency comb.

The terminal is configured to: directly obtain, by using the high layer signaling or the downlink control signaling, the orthogonal resources used to send the measurement reference signal on each antenna; or, from high layer signaling or downlink control Obtaining, in the signaling, the orthogonal resources used to send the measurement reference signal on a part of the antenna, and determining the orthogonal resources used to send the measurement reference signal on each antenna according to the resource allocation manner and the implicit mapping relationship of the configuration. .

The terminal is configured to: obtain a resource allocation manner according to the following manner:

Obtaining the resource allocation manner from high layer signaling or downlink control signaling; Or determining the resource allocation manner according to a measurement reference signal period specific to the user terminal; or determining the resource allocation manner according to whether the measurement reference signal is frequency hopping in the frequency domain.

The antenna transmission mode of the terminal refers to a physical uplink shared channel or a physical uplink control channel or an antenna transmission mode of a measurement reference signal, where the terminal is configured to: determine an antenna transmission mode by using high layer signaling or downlink control signaling. Is the single antenna transmission mode or the multi-antenna transmission mode.

The present invention further provides a base station, where the base station is configured to: allocate a positive resource allocation method by one or more of code division multiplexing (CDM), time division multiplexing (TDM), or frequency division multiplexing (FDM) And assigning resources to the antennas, so that the antennas transmit measurement reference signals on the orthogonal resources.

The base station is configured to: allocate, for the periodic measurement reference signal, the orthogonal resources to the antennas by using a CDM and a TDM resource allocation manner. Wherein, the base station is set to: for non-periodic measurement reference signals, use CDM combined with FDM

The base station is configured to: when the terminal supports two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, and the terminal selects one of the transmit antennas to transmit a measurement reference signal, and uses CDM or FDM resources. The allocation method allocates orthogonal resources for transmitting measurement reference signals for each of the set of transmit antennas.

The base station is configured to: when the CDM resource allocation mode is used, or the CDM resource allocation mode is combined with other resource allocation modes to allocate orthogonal resources to the antennas, the cyclic shift (CS) interval of each antenna should be maximized. Chemical. The base station is configured to: allocate CS resources as follows:

n _CS =(o -n _csj +iN IT _x ) o&N where, for the antenna port index, "=±1, j is the cyclic shift used by the known antenna port j to transmit the measurement reference signal, ^ is the cyclic shift The total number, 7; is the number of antennas that transmit measurement reference signals at the same time, = 0,1,...,7 -1, j = X... _x -\ _o

According to the present invention, the terminal transmits the SRS by using the antenna to select the transmission mode, which solves the SRS transmission problem in the single antenna mode or the dual antenna mode in the LTE-A system of the prior art, and proposes a multi-antenna allocation scheme for the SRS resource. The channel measurement performance of the SRS is guaranteed under the premise of saving resource overhead. BRIEF abstract

The drawings are intended to provide a further understanding of the invention, and are intended to be illustrative of the invention. In the drawing:

1 is a schematic diagram of a time domain position of a prior art demodulation reference signal;

2 is a schematic diagram of a tree structure of SRS bandwidth;

3 is a schematic diagram of a frequency domain initial position of a prior art SRS for transmitting SRSs according to the prior art; FIG. 4 is a schematic diagram of a comb structure of a prior art SRS.

The present invention provides a multi-antenna transmission method for measuring a reference signal, including:

Obtain the antenna transmission mode of the terminal or the number of antenna ports that measure the reference signal, and send the SRS according to the antenna transmission mode or the number of antenna ports that measure the reference signal.

The antenna transmission mode refers to a physical uplink shared channel or a physical uplink control channel or an antenna transmission mode for measuring a reference signal, which may be a single antenna transmission mode or a multi-antenna transmission mode. The terminal determines whether the antenna transmission mode is through high layer signaling or downlink control. The single antenna transmission mode is also the multi-antenna transmission mode. Wherein, when the number of antenna ports in the single antenna transmission mode or the measurement reference signal is 1, an antenna is selected, and the base station can configure one SRS resource to the terminal by using high layer signaling or downlink control signaling, and the terminal is in the selected antenna. The SRS resource on the SRS is sent; the number of antenna ports in the multi-antenna transmission mode or the measurement reference signal is 2 or 4, and the base station allocates orthogonal resources for transmitting measurement reference signals on each antenna, and the terminal acquires each antenna allocated by the base station. An orthogonal resource for transmitting a measurement reference signal, the measurement reference signal is transmitted on the orthogonal resources on each antenna.

The following describes further the antenna selection mode in the single antenna transmission mode or when the number of antenna ports for measuring the reference signal is 1, and the allocation method of the orthogonal resources when the number of antenna ports in the multi-antenna transmission mode or the measurement reference signal is 2 or 4. .

(1) The present invention provides an antenna selection method for an SRS in a single antenna transmission mode or when the number of antenna ports for measuring a reference signal is 1, including:

1) When the antenna selection is not enabled, the terminal transmits an SRS on a fixed antenna;

2) When the antenna selection is enabled,

A) If the terminal can support up to 2 transmit antennas, use the following method for antenna selection to send SRS:

When the frequency hopping of the SRS is not enabled, the calculation formula of the antenna index is: i ⁿ sRs ) = ⁿ sR _S mod 2 ;

Where K = [N _b , regardless of the value, W is 1 , other

N _b is the number of branches corresponding to the b layer when the SRS bandwidth tree structure is allocated. As shown in Table 1 to Table 4, the n _SRS is the transmission counter of the SRS, and the user-specific SRS bandwidth. _P is the user-specific frequency hopping bandwidth, and π is the operation of multiplying multiple numbers. When the terminal can support up to 4 transmit antennas but only 2 antennas of 4 antennas are selected, the 2 antennas are grouped into two groups, such as antenna 0 and antenna 2 as a group, antenna 1 and antenna. 3 is a group, or any combination, select a group of antennas from the two groups to send SRS, you can also use the above The method described, namely:

When the terminal supports two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, and the terminal needs to select one of the transmit antennas for measurement reference signal transmission, the antenna group index ^% ^ is determined according to the following manner:

When the SRS is enabled in the frequency domain,

₍ , ― J(3⁄4s+L" ^/2 " + 3⁄4^") ^mod 2 when it is even

^3⁄4 ₅ mod2 is an odd number where = i ^{m0d4 =} ° , ^3⁄4 is 1, , the number of branches corresponding to the 6' layer when the SRS bandwidth tree structure is allocated, ^ is the SRS transmission counter, 3⁄4^ is the user-specific SRS bandwidth, . _P is the user-specific frequency hopping bandwidth, and π is the operation of multiplying multiple numbers.

B) If the terminal can support up to 4 transmit antennas, use the following methods for antenna selection and transmission:

When the frequency hopping of the SRS is not enabled, the antenna index α (3⁄4 ^ is calculated as:

= 3⁄4 mod 4;

When the SRS is enabled in the frequency domain, the calculation formula of the antenna index is:

₍ , when K is even

When K is odd - ₍ when Κ is even

( ^3⁄4

When K is odd, where =ii ^mod4=0 , ^κ = ft^, no matter what value. Both are L

N _b , the number of branches corresponding to the b layer when the SRS bandwidth tree structure is allocated. As shown in Table 1 to Table 4, the n _SRS is the transmission counter of the SRS, and the user-specific SRS bandwidth. _P is the user-specific frequency hopping bandwidth, and π is the operation of multiplying multiple numbers. Regardless of whether the terminal can support up to two transmit antennas or four transmit antennas, in the single-antenna transmission mode, the terminal uses only one antenna to transmit the SRS at the same time. Therefore, the terminal only occupies one SRS resource at the same time, and the base station can pass the high-layer signaling or Downlink control signaling configures one SRS resource for the terminal. The SRS resource includes at least one of the following: a cyclic shift of the root sequence and/or the root sequence, a subframe position or subframe offset, a frequency band, and/or a frequency comb.

Further, the base station configures a multi-antenna terminal to adopt a single antenna transmission mode or a multi-antenna transmission mode by using high layer signaling or downlink control signaling.

(2) The present invention further provides a method for allocating SRS resources in a multi-antenna transmission mode, including:

Different antennas are allocated by means of Code Division Multiplexing (CDM), Time-Division Multiplexing (TDM), or Frequency Division Multiplexing (FDM), or any combination of the above. The orthogonal resources are allocated, and each antenna transmits an SRS (referred to as an uplink SRS) on orthogonal resources.

In one step, the orthogonal resources are allocated to different antennas by using the CDM method, including:

Further, the code domain resource is: a cyclic shift of a root sequence and/or a root sequence; the time domain resource is: a subframe position or a subframe offset; the frequency domain resource is: a frequency band and/or a frequency comb. Further, for periodic SRS, different antennas are allocated by using CDM combined with TDM.

Further, for aperiodic SRS, orthogonal antennas are allocated for different antennas by means of CDM or FDM.

Further, when the terminal supports two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, and the terminal selects one of the transmit antennas to transmit a measurement reference signal, the CDM or FDM resource allocation mode is the set of transmit antennas. Each of the antennas is allocated an orthogonal resource for transmitting a measurement reference signal. For example, when the terminal can support up to 4 transmit antennas but only 2 of the 4 antennas are selected, the 2 antennas are grouped into two groups, such as antenna 0 and antenna 2, and the antenna 1 and antenna 3 are a group, or any combination, select a group of antennas from two groups to transmit SRS, select the selection method of one transmitting antenna by using the two transmissions described above; pass CDM or FDM

Further, the base station (eNB) notifies the antennas of the terminal equipment (UE) to send the uplink SRS resources through the high layer signaling or the downlink control signaling, and the terminal directly obtains the antennas from the high layer signaling or the downlink control signaling. Sending the orthogonal resource of the measurement reference signal; or, the eNB notifies the part of the antenna of the UE to send the uplink SRS resource by using the high layer signaling or the downlink control signaling, and the UE determines the antenna according to the resource allocation mode and the implicit mapping relationship of the configuration. Send SRS resources. The resource allocation mode is configured by the base station by using the high layer signaling or the downlink control signaling; or the UE determines the resource allocation manner according to the measurement reference signal period specific to the user terminal, as described in the method 1 Or the UE determines the resource allocation manner according to whether the measurement reference signal is frequency hopping in the frequency domain, as described in the second method. The implicit mapping relationship includes: When the CDM mode is used, the implicit mapping relationship refers to determining the CS of other antennas according to the principle of maximizing the CS interval, or pre-agreed by the base station and the terminal; when the FDM mode is used, such as part of the antenna The first frequency comb is used, and the terminal receives the resource allocation mode indicated by the base station as FDM, then uses the second frequency comb on other antennas, and the like.

method one:

The SRS resource allocation mode is configured according to the length of the UE-specific SRS period. When the configured period is longer than a certain threshold M, the resources are configured by CDM or FDM; otherwise, the combination of CDM or TDM is used to combine FDM or TDM. Way to configure resources. Where M is an integer between 5 and 320 and is a multiple of 5 in milliseconds (ms) „

Method Two:

The SRS resource allocation mode is configured according to whether the SRS is hopping in the frequency domain. When the frequency domain hopping is not enabled (hopping disabled), for example, when b _hop ≥ B _SRS , the TDM mode is used; when the frequency domain hopping enabled (hopping enabled), for example, when ^b < ^BsRS , then Use CDM or FDM.

Further, when the resource allocation method used includes the CDM mode, that is, when the CDM resource allocation mode is used, or the CDM resource allocation mode is combined with other resource allocation modes to allocate orthogonal resources to the antennas, the antennas should be made. Maximize CS intervals, such as using the following formula to allocate CS resources:

n _CS =(o -n _{cs j} +iN IT _x ) o&N where, is the antenna port index, =±1, " _CSJ is the cyclic shift used by the transmitting uplink SRS for the known antenna port j, and W is the cyclic shift The total number, 2 is the number of antennas that send SRS at the same time, i = X... _x -\, j = 0X... _x -\ _o

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

The present embodiment will be described in detail below with reference to preferred examples.

Example one

When a terminal configured with multiple antennas transmits SRS only one antenna at the same time, that is, when the terminal is in single antenna transmission mode,

When the antenna selection is not enabled, the terminal sends an SRS on a fixed antenna; When the antenna selection is enabled,

A) If the terminal can support up to 2 transmit antennas, use the following method to select the antenna to send SRS:

When the frequency hopping of the SRS is not enabled, the calculation formula of the antenna index is: ^a { ⁿ sR _S ) = ⁿ sR _S mod 2 ;

i{n _SRS + [_n _SRS / 2" + ·

When K is even

S ^RS I n _SRS mod2 wh f is odd where ^{= u} , K = T丄丄N _b ^ϋ , N _bh is 1 regardless of the value.

The number of branches corresponding to the b layer when the SRS bandwidth tree structure is allocated, as shown in Tables 1 to 4, is the transmission counter of the SRS, which is the user-specific SRS bandwidth. _P is the user-specific frequency hopping bandwidth, and π is the operation of multiplying multiple numbers. When the terminal can support up to 4 transmit antennas but only 2 antennas of 4 antennas are selected, the 2 antennas are grouped into two groups, such as antenna 0 and antenna 2 as a group, antenna 1 and antenna. 3 For a group, or any combination, select a group of antennas from two groups to send SRS, you can also use the method described above.

Example two

When a terminal configured with multiple antennas transmits SRS only one antenna at the same time, that is, when the terminal is in single antenna transmission mode:

When the antenna selection is not enabled, the terminal sends an SRS on a fixed antenna;

When the antenna selection is enabled,

1) If the terminal can support up to 4 transmit antennas, use the following methods to transmit antennas: When the frequency hopping of the SRS is not enabled, the calculation formula of the antenna index is: ^a { ⁿ sR _S ) = ⁿ sR _S mod 4 ;

When K is even

When K is odd

When Κ is even

When K is odd, where =im

^m ° ^d4=0 , no matter what value, it is 1,

N _b is the number of branches corresponding to the b layer when the SRS bandwidth tree structure is allocated. As shown in Table 1 to Table 4, the n _SRS is the transmission counter of the SRS, and the user-specific SRS bandwidth. _P is the user-specific frequency hopping bandwidth, and π is the operation of multiplying multiple numbers. Further, the base station configures the multi-antenna terminal to adopt a single antenna transmission mode or a multi-antenna transmission mode by using high layer signaling or downlink control signaling.

Example three

Different antennas are allocated orthogonal resources by code division multiplexing (CDM), or time division multiplexing (TDM), or frequency division multiplexing (FDM), or any combination of the above, and each antenna is transmitted on orthogonal resources. Upstream SRS.

Further, the resource allocation mode is configured by the base station by using high layer signaling or downlink control signaling;

Further, before the orthogonal resources are allocated to the different antennas, the base station (eNB) notifies the antennas of the terminal equipment (UE) to transmit the uplink SRS resources through the high layer signaling or the downlink control signaling; or the eNB passes the high layer signaling or the downlink control. The signaling and the resource allocation mode of the uplink SRS are sent by the UE, and the UE determines the resources for sending the SRS by each antenna according to the configured implicit mapping relationship.

Further, the allocating orthogonal resources to different antennas by using a CDM manner includes: Including FDM

Optionally, the code domain resource is: a cyclic shift of a root sequence and/or a root sequence; the time domain resource is: a subframe position or a subframe offset; the frequency domain resource is: a frequency band and/or a frequency Comb

Further, for periodic SRS, the orthogonal resources are allocated to different antennas by using CDM combined with TDM, or

Further, for aperiodic SRS, orthogonal antennas are allocated for different antennas by means of CDM or FDM;

Further, when the terminal can support up to 4 transmit antennas but only 2 of the 4 antennas are selected, the antennas are grouped into two groups, such as antenna 0 and antenna 2, Antenna 1 and antenna 3 are a group, or any combination, and a group of antennas is selected from two groups to transmit SRS, and the selection method of selecting one transmitting antenna by using the two transmissions described above is adopted; the method by CDM or FDM is simultaneous The two antennas transmitting the SRS allocate orthogonal resources.

Further, when the base station does not have high-layer signaling or downlink control signaling to configure the SRS resource allocation mode of the terminal, the terminal may configure the multi-antenna SRS resource by the following two methods: Method 1: According to the user terminal-specific ( The length of the SRS period of the UE-specific is configured to configure the SRS resource allocation mode. When the configuration period is longer than a certain threshold value M, the resources are configured by using CDM or FDM; otherwise, the resources are configured by combining TDM or TDM with CDM or TDM combined with FDM. Where M is an integer between 5 and 320 and is a multiple of 5, The unit is milliseconds (ms).

Method 2: Configure the SRS resource allocation mode according to whether the SRS is hopping in the frequency domain. When the frequency domain hopping is not enabled (hopping disabled), for example, when b _hop ≥ B _SRS , the TDM mode is used; when the frequency domain hopping is enabled (Hopping enabled), for example, when ^ ^{< j8} ^, Then use CDM or FDM.

Further, when the resource allocation method used includes the CDM mode, the CS interval of each antenna should be maximized, for example, the following formula is used to allocate CS resources:

^Wherein, ζ · antenna port index, "= ± 1, ^c j is the known antenna port transmitting uplink SRS cyclic shift used, W is the total number of cyclic shifts, 2 is the number of antennas simultaneously transmit the SRS, i = 0X..., T _x -\ , j = 0X... _x -\ The present invention further provides a terminal, wherein: the terminal is configured to acquire an antenna transmission mode, and perform a measurement reference signal according to an antenna transmission mode ( SRS) is sent.

The terminal is configured to: when in a single antenna transmission mode:

The number of branches corresponding to the 6' layer when the shape structure is allocated, which is the transmission counter of the SRS, which is user-specific. SRS bandwidth, . _P is the user-specific frequency hopping bandwidth, and Π is the operation of multiplying multiple numbers. The terminal is configured to: when it supports two transmit antennas and is in a single antenna transmission mode, or support two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, and one of the transmit antennas needs to be selected. When measuring the reference signal is sent:

Sending an nth _SRS measurement reference signal on an antenna or an antenna group with an antenna index or a group index, wherein the antenna index or the group index α^^μ艮 is determined as follows:

SRS in the frequency domain

Where κ =

The other Y[N _b , N _bhgp is 1, N _b , the number of branches corresponding to the 6 ' layer when the SRS bandwidth tree structure is allocated, ^ is the transmission counter of the SRS, and the user-specific SRS bandwidth. _P is the user-specific frequency hopping bandwidth, and Π is the operation of multiplying multiple numbers. The terminal is configured to: when in a multi-antenna transmission mode, acquire orthogonal resources for transmitting measurement reference signals on each antenna allocated by the base station, and send measurement reference on the orthogonal resources on each antenna. signal.

The orthogonal resource is allocated by the base station to each of the resources by a combination of one or more of code division multiplexing (CDM), time division multiplexing (TDM), and frequency division multiplexing (FDM). antenna.

The terminal is configured to: directly obtain, by using the high layer signaling or the downlink control signaling, the orthogonal resources used to send the measurement reference signal on each antenna; or Determining, in the downlink control signaling, the orthogonal resources used to send the measurement reference signal on a part of the antenna, and determining the positive for transmitting the measurement reference signal on each antenna according to the resource allocation manner and the implicit mapping relationship of the configuration. Hand over resources.

The terminal is configured to obtain a resource allocation manner according to the following manner:

Obtaining the resource allocation manner from high layer signaling or downlink control signaling;

The antenna transmission mode of the terminal refers to a physical uplink shared channel or a physical uplink control channel or an antenna transmission mode of a measurement reference signal, where the terminal is configured to determine, by using high layer signaling or downlink control signaling, that the antenna transmission mode is The single antenna transmission mode is also the multi-antenna transmission mode.

The present invention also provides a base station, where the base station is configured to allocate orthogonality by combining resource allocation modes of one or more of code division multiplexing (CDM), time division multiplexing (TDM), and frequency division multiplexing (FDM). Resources are provided to the antennas such that the antennas transmit measurement reference signals on the orthogonal resources.

The base station is configured to allocate the orthogonal resources to the antennas by using a CDM and a TDM resource allocation manner for the periodic measurement reference signal. The base station is configured to: use a CDM combined with an FDM for a non-periodic measurement reference signal

The base station is configured to: when the terminal supports two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, and the terminal selects one of the transmit antennas to transmit a measurement reference signal, and uses CDM or FDM resources. The allocation method is for each antenna in the group of transmit antennas to be allocated for transmission An orthogonal resource that measures the reference signal.

The base station is configured to: when the CDM resource allocation mode is used, or the CDM resource allocation mode is combined with other resource allocation modes to allocate orthogonal resources to the antennas, the cyclic shift (CS) interval of each antenna should be maximized. Chemical.

The base station is configured to: allocate CS resources as follows:

n _CS =(o -n _csj +iN IT _x ) o&N where, for the antenna port index, "=±1, j is the cyclic shift used by the known antenna port j to transmit the measurement reference signal, ^ is the cyclic shift The total number, 7; is the number of antennas that simultaneously transmit the measurement reference signal, z = 0, l, ..., j - 1, j = X... _x -\ _o

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

INDUSTRIAL APPLICABILITY The terminal transmits the SRS in the transmission mode selected by the antenna, and solves the problem of SRS transmission in the single antenna mode or the dual antenna mode in the LTE-A system of the prior art, and proposes a multi-antenna allocation scheme for the SRS resource. The channel measurement performance of the SRS is guaranteed under the premise of saving resource overhead.

Claims

Claim

1. A multi-antenna transmission method for measuring a reference signal, comprising:

2. The method according to claim 1, wherein, when the terminal is in the single antenna transmission mode or the number of antenna ports of the measurement reference signal is 1, the transmission of the measurement reference signal includes:

When the frequency hopping of the SRS in the frequency domain is not enabled, when the frequency hopping of the SRS is enabled in the frequency domain,

The number of branches corresponding to the 6' layer when the shape structure is allocated, ^ is the transmission counter of the SRS, and the user-specific SRS bandwidth is 3⁄4^. _Ρ is the user-specific frequency hopping bandwidth, Π multiplied by multiple numbers.

3. The method according to claim 1, wherein, when the terminal supports two transmit antennas and is in a single antenna transmission mode or the number of antenna ports for measuring a reference signal is 1, or the terminal supports two sets of transmit antennas, each group transmits The antenna includes at least two transmit antennas, and when the terminal needs to select one of the transmit antennas to transmit the measurement reference signal, the sending of the measurement reference signal includes:

The terminal transmits an nth _SRS measurement reference signal on an antenna or an antenna group whose antenna index or group index is, wherein the antenna index or the group index α (3⁄4^ is determined according to the following manner: When the frequency hopping of the SRS is not enabled, a, n _SRS ) = n _SRS mod 2;

When the SRS is enabled in the frequency domain,

₍ , ― J(3⁄4s+L" ^/2 " + 3⁄4^") ^mod 2 when it is even

^3⁄4 ₅ mod2 is an odd number where = i ^{m0d4 =} ° , ^3⁄4 is 1, and is the SRS bandwidth tree

The number of branches corresponding to the 6' layer when the structure is allocated, ^ is the transmission counter of the SRS, and the user-specific SRS bandwidth is 3⁄4^. _P is the user-specific frequency hopping bandwidth, and Π is the operation of multiplying multiple numbers.

The method according to claim 1, wherein, when the terminal is in the multi-antenna transmission mode or the number of antenna ports of the measurement reference signal is 2 or 4, the transmitting the measurement reference signal comprises: acquiring by the terminal An orthogonal resource for transmitting a measurement reference signal on each antenna allocated by the base station, and transmitting a measurement reference signal on the orthogonal resources on each antenna.

5. The method according to claim 4, wherein the orthogonal resource is one or more of the base station by code division multiplexing (CDM), time division multiplexing (TDM) or frequency division multiplexing (FDM). A combined resource allocation manner is assigned to each of the antennas.

6. The method according to claim 5, wherein the allocating orthogonal resources by way of CDM resource allocation comprises allocating orthogonal code domain resources by using a CDM manner;

And being: a cyclic shift of the root sequence and/or the root sequence; the time domain resource is: a subframe position or a subframe offset; and the frequency domain resource is: a frequency band and/or a frequency comb.

The method of claim 5, wherein, for the periodic measurement reference signal, the orthogonal resources are allocated to the antennas by using a CDM in combination with a TDM resource allocation manner.

8. The method according to claim 5, wherein, for the non-periodic measurement reference signal,

9. The method according to claim 5, wherein when the terminal supports two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, and the terminal selects one of the transmit antennas to transmit a measurement reference signal, the CDM is used. Or the FDM resource allocation mode is divided into antennas in the group of transmit antennas. Equipped with orthogonal resources for transmitting measurement reference signals.

The method according to claim 5, wherein the terminal directly obtains the orthogonal resources on the antennas for transmitting the measurement reference signal from a high layer signaling or a downlink control signaling; or The terminal obtains, by using the high layer signaling or the downlink control signaling, the orthogonal resource used for sending the measurement reference signal on a part of the antenna, and determining the used on each antenna according to the resource allocation mode and the implicit mapping relationship of the configuration. The orthogonal resources of the measurement reference signal are transmitted.

The method according to claim 10, wherein the terminal obtains a resource allocation manner according to the following manner:

Obtained from high layer signaling or downlink control signaling;

12. The method of claim 11 wherein

Determining, by the user terminal, a measurement reference signal period, the resource allocation manner includes:

13. The method of claim 11 wherein

The method for determining the resource allocation according to whether the measurement reference signal is frequency hopping includes: when the frequency domain frequency hopping is not enabled, using a resource allocation mode of the TDM; when the frequency domain frequency hopping is enabled, using the CDM or the FDM The way resources are allocated.

The method according to claim 5, wherein when the CDM resource allocation mode is used, or the CDM resource allocation mode is combined with other resource allocation modes to allocate orthogonal resources to the antennas, cyclic shift of each antenna should be performed. (CS) Maximize the interval.

15. The method of claim 14, wherein the CS resources are allocated as follows:

n _CS = (o - n _{cs j} + i - N IT _x ) o& N where, for the antenna port index, "=±1, j is the known antenna port j to send the measurement parameters The cyclic shift used by the test signal, ^ is the total number of cyclic shifts, 7; is the number of antennas that simultaneously transmit the measurement reference signal, z = 0, l,..., j - 1 , j = X... _x -\ _o

The method according to claim 1 or 4, wherein the antenna transmission mode of the terminal refers to a physical uplink shared channel or a physical uplink control channel or an antenna transmission mode of a measurement reference signal, and the terminal passes the high layer signaling. Or the downlink control signaling determines whether the antenna transmission mode is a single antenna transmission mode or a multi-antenna transmission mode.

17. A terminal, the terminal is configured to: acquire an antenna transmission mode or a number of antenna ports for measuring a reference signal, and perform measurement reference signal (SRS) transmission according to an antenna transmission mode or an antenna port number of a measurement reference signal.

The terminal according to claim 17, wherein the terminal is further configured to: when in the single antenna transmission mode or when the number of antenna ports for measuring the reference signal is 1:

The number of branches corresponding to the 6' layer when the shape structure is allocated, ^ is the transmission counter of the SRS, and the user-specific SRS bandwidth is 3⁄4^. _P is the user-specific frequency hopping bandwidth, and Π is the operation of multiplying multiple numbers.

The terminal according to claim 17, wherein the terminal is further configured to: when the two transmit antennas are supported and in the single antenna transmission mode or the number of antenna ports for measuring the reference signal is 1, or 2 sets of transmissions are supported Antenna, each group of transmitting antennas includes at least 2 transmitting antennas, and needs to be selected When a set of transmit antennas is used to transmit measurement reference signals:

Sending an nth _SRS measurement reference signal on an antenna or an antenna group whose antenna index or group index is, wherein the antenna index or the group index α^^μ艮 is determined as follows:

When the SRS is enabled in the frequency domain,

₍ , ― J(3⁄4s+L" ^/2 "+ 3⁄4^") ^mod 2 when it is even

^3⁄4 ₅ mod2 is an odd number where = i ^{m0d4 =} ° , ^3⁄4 is 1, , the number of branches corresponding to the 6 ' layer when assigning the SRS bandwidth tree structure, ^ is the SRS transmit counter, 3⁄4^ is the user-specific SRS bandwidth, . _P is the user-specific frequency hopping bandwidth, and Π is the operation of multiplying multiple numbers.

The terminal according to claim 17, wherein the terminal is further configured to: when the number of antenna ports in the multi-antenna transmission mode or the measurement reference signal is 2 or 4, acquire the antennas allocated by the base station for An orthogonal resource that transmits a measurement reference signal transmits a measurement reference signal on the orthogonal resources on each antenna.

The terminal according to claim 20, wherein the orthogonal resource is one or more of the base station by code division multiplexing (CDM), time division multiplexing (TDM), or frequency division multiplexing (FDM). A combined resource allocation manner is assigned to each of the antennas.

The terminal according to claim 21, wherein the method for allocating by CDM resources

The source is: a cyclic shift of the root sequence and/or the root sequence; the time domain resource is: a subframe position or a subframe offset; and the frequency domain resource is: a frequency band and/or a frequency comb.

The terminal according to claim 21, wherein the terminal is configured to: directly obtain the orthogonality on the antennas for transmitting the measurement reference signal from high layer signaling or downlink control signaling Or obtaining the orthogonal resource on the part of the antenna for transmitting the measurement reference signal from the high layer signaling or the downlink control signaling, and combining the resource allocation manner and the implicit mapping of the configuration And determining, by the orthogonal resources, the measurement reference signals on each antenna.

The terminal according to claim 23, wherein the terminal is configured to: obtain a resource allocation manner according to the following method:

25. The terminal of claim 24, wherein

When the measurement reference signal period is greater than the threshold Μ, the resource allocation mode of the CDM or the FDM is used, otherwise the TDM is used, or the TDM is combined with the CDM, or the TDM is combined with the FDM resource allocation manner, where the Μ is 5 to 320 An integer between and is a multiple of 5 in milliseconds.

26. The terminal of claim 24, wherein

The terminal according to claim 17 or 20, wherein the antenna transmission mode of the terminal refers to a physical uplink shared channel or a physical uplink control channel or an antenna transmission mode of a measurement reference signal, where the terminal is set to: Whether the antenna transmission mode is the single antenna transmission mode or the multi-antenna transmission mode is determined by the high layer signaling or the downlink control signaling.

28. A base station, the base station configured to: allocate orthogonal resources by one or more combined resource allocation modes in code division multiplexing (CDM), time division multiplexing (TDM), or frequency division multiplexing (FDM) Giving the antennas such that the antennas transmit measurement reference signals on the orthogonal resources.

The base station according to claim 28, wherein the base station is configured to: allocate, for the periodic measurement reference signal, the orthogonal resources to the antennas by using a CDM and a TDM resource allocation manner.

30. The base station according to claim 28, wherein the base station is set to: for non-periodic measurement Hand over resources.

The terminal according to claim 28, wherein the base station is configured to: when the terminal supports two sets of transmit antennas, each set of transmit antennas includes at least two transmit antennas, and the terminal selects one of the transmit antennas for transmitting When measuring the reference signal, each of the set of transmit antennas is allocated an orthogonal resource for transmitting the measurement reference signal in a CDM or FDM resource allocation manner.

The terminal according to claim 28, wherein the base station is configured to: when the CDM resource allocation mode is used, or the CDM resource allocation mode is combined with other resource allocation modes to allocate orthogonal resources to the antennas, The cyclic shift (CS) spacing of each antenna is maximized.

33. The terminal according to claim 32, wherein the base station is configured to: allocate CS resources as follows: