KR20130018073A - Srs transmission control method of transmission point, transmission point thereof, srs transmission method of user equipment, and user equipment thereof - Google Patents

Abstract

The present invention relates to a wireless communication system for transmitting and receiving a sounding reference signal (SRS) which is a reference signal for uplink channel estimation.

Description

SRS transmission control method of the transmission end, the transmission end, the SRS transmission method of the terminal, and the terminal {SRS Transmission Control Method of Transmission Point, Transmission Point Thereof, SRS Transmission Method of User Equipment, and User Equipment Thereof}

The present invention relates to a wireless communication system for transmitting and receiving a sounding reference signal (SRS) which is a reference signal for uplink channel estimation.

The sounding reference signal (SRS) of the uplink reference signals currently used in the wireless mobile communication system is mainly channel quality estimation for enabling frequency-selective scheduling of uplink. Used for estimation. The SRS may be transmitted without being associated with transmission of uplink data and / or control information.

With the development of wireless mobile communication systems, CoMP (Coordinated Multi-Point Transmission and Reception) and MU-MIMO (Multi User-Multiple Input Multiple Output) technologies are being considered. For this technique, more terminals may be transmitted by dividing SRS. In this case, there may be a shortage of resources that can be allocated for each terminal for SRS. Thus, there is a need to increase the SRS transmittable space.

An object of the present invention is to enable an SRS to be transmitted using a space in which a DMRS (DeModulation Reference Signal) used for demodulation of an uplink reference signal is transmitted in order to increase an SRS transmittable space.

In order to achieve the above object, an embodiment of the present invention provides a sounding reference transmitted by the terminal in a demodulation reference signal (DMRS) transmission space of a resource block different from a resource block through which the terminal transmits uplink data. Transmitting setting information of a signal) to the terminal; And transmitting control information including information on two consecutive resource blocks spaced apart from each other.

According to another embodiment of the present invention, configuration information of a sounding reference signal (SRS) transmitted by the terminal in a DMRS (DeModulation Reference Signal) transmission space of a resource block different from that of the terminal for transmitting uplink data is transmitted. An upper layer signal transmitter for transmitting to the terminal; And a control information transmitter for transmitting control information including information about two consecutive resource blocks spaced apart from each other.

Another embodiment of the present invention, the terminal receives the configuration information of the SRS (Sounding Reference Signal) transmitted by the terminal in the DMRS (DeModulation Reference Signal) transmission space of the resource block different from the resource block for transmitting the uplink data Making; Receiving control information including information about two consecutive resource blocks spaced apart from each other; And transmitting the SRS through a DMRS transmission space of one consecutive resource block of the two consecutive resource blocks based on the configuration information.

Another embodiment of the present invention, the terminal receives the configuration information of the SRS (Sounding Reference Signal) transmitted by the terminal in the DMRS (DeModulation Reference Signal) transmission space of the resource block different from the resource block for transmitting the uplink data An upper layer signal receiver; A control information receiver configured to receive control information including information about two consecutive resource blocks spaced apart from each other; And an uplink transmitter configured to transmit an SRS through a DMRS transmission space of one consecutive resource block of the two consecutive resource blocks based on the configuration information.

According to the present invention described above, it is possible to transmit the SRS in the resources allocated for the DMRS transmission in the uplink.

1 illustrates a communication system to which embodiments of the present invention are applied.
2 illustrates an example of a method of transmitting uplink DMRS and SRS in wireless mobile communication.
3 illustrates an SRS transmission interval according to an embodiment.
4 illustrates an SRS transmission space according to another embodiment.
5 is a configuration diagram of a communication system according to an embodiment of the present invention.
6 illustrates one embodiment of a method executed in the system of FIG.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 illustrates a communication system to which embodiments of the present invention are applied.

Communication systems are widely deployed to provide various communication services such as voice, packet data, and the like.

Referring to FIG. 1, a communication system includes a user equipment (UE) 10 and a transmission point 20 that performs uplink and downlink communication with the terminal 10.

In the present specification, the terminal 10 or a user equipment (UE) is a comprehensive concept that means a user terminal in wireless communication. In addition to the UE in WCDMA, LTE, and HSPA, as well as a mobile station (MS) and a UT (GSM) in GSM, It should be interpreted as a concept that includes a user terminal, a subscriber station (SS), and a wireless device.

The transmitting end 20 or cell generally refers to a station communicating with the terminal 10, and includes a base station, a node-B, an evolved node-B, and a base transceiver. It may be called other terms such as a System, an Access Point, a Relay Node, and the like.

In the present specification, the transmission terminal 20 or a cell should be interpreted in a comprehensive sense indicating a part of a region covered by a base station controller (BSC) in a CDMA, a NodeB of a WCDMA, etc., and a radio remote connected to a base station. Comprehensive means any type of device that can communicate with a single terminal, such as a head, relay node, a sector of a macro cell, a site, or a micro cell such as a femtocell or picocell. Used as a concept.

In the present specification, the terminal 10 and the transmitting terminal 20 are used as a transmitting and receiving entity used in implementing the technology or the technical idea described in this specification in a comprehensive sense and are not limited to the terms or words specifically referred to.

Although one terminal 10 and one transmission terminal 20 are shown in FIG. 1, the present invention is not limited thereto. It is possible for one transmission terminal 20 to communicate with the plurality of terminals 10, and one terminal 10 may communicate with the plurality of transmission terminals 20.

There are no limitations to the multiple access scheme applied to a communication system, and the present invention provides the code division multiple access (CDMA), time division multiple access (TDMA), frequency division multiple access (FDMA), orthogonal frequency division multiple access (OFDMA), and OFDM. Applicable to various multiple access schemes such as FDMA, OFDM-TDMA, and OFDM-CDMA.

In addition, the present invention is a combination of the TDD (Time Division Duplex) method is transmitted using a different time, uplink transmission and downlink transmission, FDD (Frequency Division Duplex) method is transmitted using a different frequency, combining the TDD and FDD Applicable to hybrid duplexing method.

Specifically, embodiments of the present invention are applicable to asynchronous wireless communication that evolves into Long Term Evolution (LTE) and LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication that evolves into CDMA, CDMA-2000, and UMB. Can be. The present invention should not be construed as being limited or limited to a specific wireless communication field, but should be interpreted as including all technical fields to which the spirit of the present invention can be applied.

Referring to FIG. 1, the terminal 10 and the transmitter 20 may communicate in uplink and downlink.

On the other hand, one radioframe or radio frame is composed of 10 subframes, and one subframe is composed of two slots. The radio frame has a length of 10 ms and the subframe has a length of 1.0 ms. In general, a basic unit of data transmission is a subframe unit, and downlink or uplink scheduling is performed in units of subframes.

One slot may have a plurality of OFDM symbols in the time domain and include at least one subcarrier in the frequency domain. For example, a slot may include seven OFDM symbols (in the case of the Normal Cyclic Prefix) or six OFDM symbols in the time domain and may include 12 subcarriers in the frequency domain. The time-frequency domain defined as one slot may be referred to as a resource block (RB), but is not limited thereto.

Referring to FIG. 1, the terminal 10 and the transmitter 20 may communicate in uplink and downlink.

The transmitting end 20 may perform downlink transmission to the terminal 10. The transmitter 20 may transmit a physical downlink shared channel (PDSCH) as a downlink data channel for unicast transmission. In addition, the transmitter 20 may schedule downlink control information such as scheduling required for reception of the PDSCH and transmission for uplink data channel (for example, a physical uplink shared channel (PUSCH)). Indicator for distinguishing a physical downlink control channel (PDCCH) as a downlink control channel used for transmitting downlink control information (DCI) including grant information, a region of a PDSCH and a PDCCH Physical Control Format Indicator Channel (PCFICH) for transmitting the PHY, Physical HARQ Indicator Channel (PHICH) for transmitting the HARQ (Hybrid Automatic Repeat request) for uplink transmission The control channel can be transmitted. Hereinafter, the transmission / reception of a signal through each channel will be described in a form in which the corresponding channel is transmitted / received.

The terminal 10 may perform uplink transmission to the transmitting end 20. The terminal 10 may transmit a PUSCH as an uplink data channel for unicast transmission. In addition, the terminal 10 includes uplink control information including a HARQ acknowledgment indicating whether the downlink transport block has been successfully received, a channel state report, and a scheduling request for requesting resource allocation when transmitting data in the uplink. A physical uplink control channel (PUCCH) as an uplink control channel used for transmitting uplink control information (UCI) may be transmitted.

The base station 20 includes a cell-specific reference signal (CRS), a MBSFN reference signal (Multicast / Broadcast over Single Frequency Network Reference Signal, MBSFN-RS), and a UE-specific reference signal (UE-) in downlink. Specific Reference Signal (DM-RS), Positioning Reference Signal (PRS), and CSI Reference Signal (Channel Status Information Reference Signal, CSI-RS) may be transmitted.

The terminal 10 may transmit a demodulation reference signal (DMRS) and a sounding reference signal (SRS) in uplink. As will be described later, the parameters required for DMRS and SRS transmission are higher than the DCI transmitted in higher layer signaling and / or dynamic, such as radio resource control (RRC) signaling transmitted semi-statically. The same control information may be transmitted from the transmitter 20 to the terminal 10.

2 illustrates an example of a method of transmitting uplink DMRS and SRS in wireless mobile communication. In FIG. 2, the horizontal axis represents a symbol and represents one subframe as a whole. The vertical axis represents a resource block (RB).

Referring to FIG. 2, each UE UE1 to UE3 may transmit the PUSCHs 201, 203, and 205 through a resource block indicated by the DCI for each UE UE1 to UE3. The DMRSs 202, 204, and 206, which are reference signals used to demodulate the PUSCHs 201, 203, and 205 transmitted by the UEs UE1 to UE3, are the same as the PUSCHs 201, 203, and 205 on the frequency axis. In a resource block, the time axis may be transmitted in one symbol of each of two slots in a subframe. The SRS 207 transmitted by the terminals may be transmitted in the last symbol of the subframe.

The specific subframe in which the SRS is transmitted may be set periodically or aperiodicly. For example, cell-specific SRS transmission as defined in Table 1 (Frequency Division Duplex (FDD)) or Table 2 (Time Division Duplex (TDD)) below. Among the possible subframes, the SRS may be periodically transmitted in a subframe having a specific period and offset for each terminal. Such an SRS may be called a periodic SRS or a trigger type 0 SRS. Alternatively, among the cell-specific SRS transmittable subframes described above, the SRS may be transmitted in a specific subframe that is configured aperiodically. Such an SRS may be referred to as an aperiodic SRS or trigger type 1 SRS.

[Table 1]

[Table 2]

Tables 1 and 2 represent cell-specific SRS transmittable subframes defined in FDD (frame structure type 1) and TDD (frame structure type 2), respectively, in period (T _SFC ) and offset (Δ _SFC ). In total, there are 16 possible cases, which can be transmitted by 4-bit higher layer signaling (eg, RRC signaling). For example, in Table 1, if the value of srs-SubframeConfig is 7 (0111), the period (T _SFC ) is 5 and the offset (Δ _SFC ) is {0, 1}. SRS is transmitted in the second subframe.

The periodic SRS refers to an SRS periodically transmitted to a corresponding subframe with a specific period and offset for each UE among the cell-specific SRS transmittable subframes.

Table 3 (FDD) and Table 4 (TDD) are tables showing specific periods and offsets of periodic SRS defined for each UE.

[Table 3]

[Table 4]

Tables 3 and 4 represent subframes in which periodic SRSs specified for UEs defined in FDD and TDD are transmitted in a period (T _SRS ) and an offset (T _offset ), respectively, and the total number of possible cases is 1024. It may be sent in 10-bit higher layer signaling (eg, RRC signaling). For example, in Table 3, if the I _SRS value is 3, the period (T _SRS ) is 5 and the offset (T _offset ) is 1, which means that the periodic SRS for the UE in the second subframe is determined based on 5 subframe units. Will be sent.

In addition, information on a resource block (RB) through which the SRS is transmitted may be signaled. First, the cell-specific number of total resource blocks used is signaled (in this case, the resource blocks used are specific resource blocks corresponding to the number signaled among the resource blocks corresponding to the total system bandwidth (BW). For example, if the system bandwidth is 50 resource blocks and the number of resource blocks signaled is 48, then 48 resource blocks are used among the total 50 resource blocks.), And cell-specific resource blocks are used for each terminal. The number and location of resource blocks is signaled.

For example, Table 5 is a table used when the system bandwidth is 40 to 60 resource blocks. Different tables can be defined for each system bandwidth. The total number of cell-specific resource blocks used may be transmitted as a parameter value called C _SRS . The number of resource blocks used for each UE among cell-specific resource blocks may be defined by a parameter called B _SRS . For example, in Table 5, if the C _SRS is 1 and the B _SRS is 2, the number of cell-specific resource blocks (m _{SRS, 0} ) used for total SRS transmission is 48 resource blocks used for a specific UE. The number of m (S _{SRS, 2} ) is eight. Apart from this, a parameter called n _RRC may be defined to represent the location of the resource block used for each terminal. These parameters C _SRS , B _SRS , n _RRC may be transmitted via higher layer signaling (eg, RRC).

[Table 5]

In addition, information on the subcarrier to which the SRS is allocated may be signaled. The transmission comb (k _TC ) value, which is information on the subcarrier to which the SRS is allocated, is 0 or 1, and the even number of subcarriers to which the SRS sequence is substantially mapped is transmitted to the SRS transmission subframe and the SRS transmission resource block. It is indicated whether the first subcarrier is an even subcarrier or every odd subcarrier. This may also be transmitted by higher layer signaling (eg, RRC signaling) for each terminal.

)를 순환 지연(Cyclic Shift, CS)하여 SRS 전송을 위해 사용되는 자원 블록을 기반으로 하는 길이(

=사용되는 RB 개수 X RB 내의 서브캐리어 수(보통 12)/2)를 가지고 생성되게 된다. 이때 기본 시퀀스는 각 셀마다 또한 각 서브프레임마다 서로 다르게 생성될 수 있고(즉, 셀 아이디와 서브프레임 내의 슬롯 번호에 따라 기본 시퀀스의 u 및 v 값이 달라질 수 있고), 순환 지연 값

는 각 단말 및 안테나 포트마다 서로 다르게 생성될 수 있다. 순환 지연 값을 계산할 때 사용되는

은 각 단말에 대하여 0 내지 7의 총 8가지 값이 상위계층 시그널링(예를 들면, RRC)으로 전송되고, 각 안테나 포트에 대한 순환 지연 값은 수학식 1에서 볼 수 있는 바와 같이 전송된

값에 기초하여 정해진다. 수학식1에서

는 안테나 포트 번호 인덱스이고,

는 SRS 전송 안테나 개수에 해당한다.Here, the SRS sequence is a base sequence (base sequence) based on the Zadoff-Chu sequence (Equation 1)

), The length based on the resource block used for SRS transmission by cyclic delay (CS)

= Number of RBs used X number of subcarriers in RB (usually 12) / 2). In this case, the base sequence may be generated differently for each cell and each subframe (that is, the u and v values of the base sequence may vary according to the cell ID and the slot number in the subframe), and the cyclic delay value

May be generated differently for each terminal and antenna port. Used to calculate the circular delay value

Eight total values of 0 to 7 for each UE are transmitted through higher layer signaling (eg, RRC), and a cyclic delay value for each antenna port is transmitted as shown in Equation 1.

Determined based on the value. In Equation 1

Is the antenna port number index,

Corresponds to the number of SRS transmit antennas.

[Equation 1]

, 및 안테나 포트의 개수가 RRC 시그널링과 같은 상위계층 시그널링을 통해 전송단으로부터 단말로 전달될 수 있다. 이를 정리하면, 다음의 표 6과 같다.In summary, in order for a UE to transmit a periodic SRS or trigger type 0 SRS, C _SRS , which is a parameter for determining a resource block in which srs-SubframeConfig, I _SRS and SRS are transmitted, are parameters for determining a subframe in which the SRS is transmitted. , B _SRS , n _RRC , k _TC , which is a parameter for determining a subcarrier to which SRS is allocated, and a parameter for determining the cyclic delay of SRS.

The number of, and antenna ports may be delivered from the transmitter to the terminal through higher layer signaling such as RRC signaling. This is summarized in Table 6 below.

TABLE 6

Meanwhile, among the cell-specific SRS transmittable subframes determined in Table 1 or Table 2, the SRS may be transmitted in a specific subframe in which a SRS is set aperiodically, and may be referred to as an aperiodic SRS or a trigger type 1 SRS. .

In this case, the SRS has a specific period and offset defined for each UE as shown in Table 7 (FDD) or Table 8 (TDD) among the cell-specific SRS transmittable subframes set in Table 1 or Table 2. It is periodically transmitted in a specific subframe. Here, the non-periodic transmission means pre-specifying some configurable cases and triggering SRS transmission through dynamic signaling such as DCI whenever necessary. As described above, in the case of periodic (trigger type 0) SRS, various signaling information for SRS transmission (for example, information on an SRS transmission subframe, information on an SRS transmission resource block, and an SRS allocation subcarrier) In the case of aperiodic (trigger type 1) SRS, SRS is not compared to information, information on a cyclic delay value used when generating an SRS sequence, information on the number of SRS transmit antennas, and the like, through higher layer signaling (RRC signaling). Some of the signaling information for transmission are not delivered directly, but only a few cases are designated as parameter sets through higher layer signaling (RRC signaling), and only when SRS transmission is required. Only the value indicating is transmitted through dynamic signaling such as DCI.

[Table 7]

[Table 8]

, 및 안테나 포트 개수를 포함할 수 있다. 한편, 파라미터 srs-SubframeConfig 및 C_SRS는 상술한 파라미터 셋에 포함되지 않을 수 있다. 이를 정리하면 다음의 표 9와 같다.For aperiodic SRS or trigger type 1 SRS, the parameters included in the parameter set are I _SRS , which is a parameter used to determine the SRS transmission subframe, and B _SRS , n _RRC , which is a parameter used to determine the SRS transmission resource block. K _TC is a parameter used to determine the subcarrier to which the SRS is assigned, and a parameter is used to determine the cyclic delay of the SRS.

, And antenna port numbers. Meanwhile, the parameters srs-SubframeConfig and the C _SRS may not be included in the above-described parameter set. This is summarized in Table 9 below.

TABLE 9

In the DCI format 0, a signal for triggering an aperiodic SRS is 1 bit, and a value transmitted through this may be as shown in Table 10 below. In the case of DCI format 4, the signal for triggering the aperiodic SRS is 2 bits, and a value transmitted through this may be as shown in Table 11 below.

[Table 10]

TABLE 11

For example, in the DCI format 4, if the value of the SRS request field is '00', aperiodic SRS or type 1 SRS is not transmitted, and if the value of the SRS request field is '01', '10' or '11'. Aperiodic SRS or Type 1 SRS is transmitted according to a parameter by one of a parameter set configured through higher layer signaling (RRC signaling).

Meanwhile, DMRS is associated with PUSCH transmission or PUCCH transmission and is mainly used for channel estimation for demodulation. At this time, since the DMRS is transmitted in every slot in every subframe in which the PUSCH or the PUCCH is transmitted, there is no need to separately indicate information on the DMRS transmission subframe like the SRS. In addition, since the DMRS is associated with the PUSCH transmission or the PUCCH transmission, information on the DMRS transmission resource block is also based on the previously transmitted signaling information. For example, in the case of a DMRS associated with a PUSCH, the DMRS is transmitted to a resource block to which a PUSCH is allocated, and thus is based on this. At this time, the resource blocks to which the PUSCH is allocated for each terminal are based on the field value for the resource block allocation of the DCI.

In addition, since the DMRS sequence is mapped and transmitted for all subcarriers in the resource block used for DMRS transmission, information such as a comb value, which is information about an allocated subcarrier in SRS, is not required.

)를 순환 지연하여 DMRS 전송을 위해 사용되는 자원 블록에 해당하는 길이(

=사용되는 RB 개수 X RB 내의 서브캐리어 수(보통 12)/2)를 가지고 생성되게 된다. 이때 기본 시퀀스는 각 셀마다 또한 각 서브프레임마다 서로 다르게 생성될 수 있고(즉, 셀 아이디와 서브프레임 내의 슬롯 번호에 따라 기본 시퀀스의 u 및 v 값이 달라질 수 있고), 순환 지연 값

는 각 단말 및 안테나 포트마다 서로 다르게 생성될 수 있다.At this time, the DMRS sequence, like the SRS sequence, based on the Zadoff-Chu sequence as shown in Equation 2, one basic sequence (

Cycle delay) to the length corresponding to the resource block used for DMRS transmission.

= Number of RBs used X number of subcarriers in RB (usually 12) / 2). In this case, the base sequence may be generated differently for each cell and each subframe (that is, the u and v values of the base sequence may vary according to the cell ID and the slot number in the subframe), and the cyclic delay value

May be generated differently for each terminal and antenna port.

값은 각 단말 별로 다르게 전송되고, 이는 DCI에 포함된 3비트 값을 통해서 전송단으로부터 단말로 전송된다. 또한, DMRS 시퀀스 생성시 사용되는 직교 시퀀스(orthogonal sequence, OCC 등)에 해당하는 w^(λ)의 값 역시 DCI를 통해 전송되는 상기 3비트 값에 따라 지시된다. 이때,

와 w^(λ)를 지시하기 위해 사용되는 3비트 값과 이에 따른

와 w^(λ)의 값의 예는 다음의 표 12와 같다.In this case, n _{CS, λ} used when calculating the cyclic delay value is obtained by performing a modular 12 operation on a total of three parameter values as shown in Equation 2, unlike the other parameter values.

The value is transmitted differently for each terminal, which is transmitted from the transmitter to the terminal through the 3-bit value included in the DCI. In addition, the value of w ^(λ) corresponding to an orthogonal sequence (OCC, etc.) used when generating a DMRS sequence is also indicated according to the 3-bit value transmitted through DCI. At this time,

3-bit value used to indicate and w ^(λ)

Examples of values of and w ^(λ) are shown in Table 12 below.

&Quot; (2) "

[Table 12]

The above information for DM-RS transmission is summarized in Table 13 below.

[Table 13]

Meanwhile, resource allocation (RA) in uplink may be delivered to a terminal through DCI. In the uplink DCI format, a method for indicating one resource composed of contiguous resource blocks with uplink resource allocation (type 0) and a method for indicating two resources composed of contiguous resource blocks with uplink resource allocation (type 1) This can be. Hereinafter, a resource composed of contiguous resource blocks will be referred to as a cluster.

In the type 0 method of allocating one cluster, the resource block index of the start point of the cluster and the length of the cluster in resource block units may be represented by Equation 3 below.

&Quot; (3) "

는 상향링크에서 전체 자원 블록의 개수, RB_START는 클러스터 시작 지점의 자원 블록 인덱스, 그리고 RIV는 DCI에 포함되어 단말로 전달되는 자원 지시 값(Resource Indication Value)을 나타낸다.In Equation 3, L _CRB is the length of the cluster,

Is the total number of resource blocks in uplink, RB _START is the resource block index of the cluster start point, and RIV is a resource indication value (Resource Indication Value) included in the DCI and delivered to the terminal.

Meanwhile, in the type 1 method of allocating two clusters spaced apart in the frequency space, a unit of resource allocation is a resource block group (RBG). The size (P) of the resource block group according to each system frequency band is shown in Table 14 below.

[Table 14]

As a method for indicating resource allocation, a start point and an end point of each of the two clusters are notified and can be expressed by Equation 4 below.

&Quot; (4) "

In Equation 4, r is a value included in the DCI and transmitted to the terminal.

Coordinated Multi-Point Transmission and Reception (CoMP) technology, which is considered with the development of wireless mobile communication system, Multi User-Multiple Input Multiple Output (MU-MIMO), etc. To this end, there may occur many cases in which SRSs should be transmitted separately for more terminals. To this end, since there may be a lack of resources for the current SRS that can be allocated for each terminal and allocated, a method for increasing this may be necessary.

As one of such methods, an SRS transmission method using non-precoded DMRS may be used by utilizing a DMRS space in a PUSCH allocated for uplink data transmission. Hereinafter, this SRS will be referred to as DMRS-SRS or type 2 SRS.

DCI format 0 or DCI format 4 may be used to indicate uplink data transmission. In this format, there are uplink resource allocation type 0 and uplink resource allocation type 1 as formats for allocating uplink resources. Type 0 is a format for allocating one cluster resource, and type 1 is a format for allocating a plurality of cluster resources.

In an embodiment of the present invention, in a situation where a specific condition for SRS transmission is satisfied, two cluster resources are indicated by applying a resource allocation type 1 of an uplink DCI format, and one cluster resource allocates uplink data allocation. One cluster resource may be used for SRS transmission for channel estimation. At this time, the uplink data is not transmitted to the cluster resource allocated for SRS transmission, and the SRS is transmitted using a period (symbol) in which the DMRS is transmitted in the allocated resource.

3 illustrates an SRS transmission interval according to an embodiment.

Referring to FIG. 3, one cluster is allocated for the uplink of UE 1, the PUSCH transmission resource 301 is located in the allocated cluster, and the DMRS 302 for the UE 1 is associated with the PUSCH transmission resource 301. In the same resource block, one symbol is located in each of the first slot and the second slot. Meanwhile, two clusters are allocated for the uplink of the terminal 2, and the PUSCH transmission resource 303 is located in one of the two clusters, and the DMRS 304 for the terminal 2 is a resource such as the PUSCH transmission resource 303. In the first slot and the second slot in the block, each located in one symbol, DMRS-SRS 305 is located in the symbol that is the DMRS transmission position of the first slot and / or second slot in the other of the two clusters. (In FIG. 3, the SRS 305 is shown to be located in one symbol which is the DMRS transmission position of the first slot). In FIG. 3, "306" is a last symbol of a subframe in which a periodic SRS (type 0 SRS) or an aperiodic SRS (type 1 SRS) may be transmitted.

4 illustrates an SRS transmission space according to another embodiment.

Referring to FIG. 4, one cluster is allocated for an uplink of UE 1, a PUSCH transmission resource 401 is located in an allocated cluster, and a DMRS 402 for UE 1 is connected to a PUSCH transmission resource 401. In the same resource block, one symbol is located in each of the first slot and the second slot. One cluster is allocated for the uplink of UE 2, the PUSCH transmission resource 403 is located in the allocated cluster, and the DMRS 404 for the UE 2 is the first in a resource block such as the PUSCH transmission resource 403. It is located in one symbol each in the slot and the second slot. Meanwhile, two clusters are allocated for uplink of UE 3, and PUSCH transmission resources 405 are located in one of the two clusters, and DMRS 406 for UE 3 is a resource such as PUSCH transmission resources 405. In the first slot and the second slot in the block, each located in one symbol, DMRS-SRS 407 is located in the symbol that is the DMRS transmission position of the first slot and / or second slot in the other of the two clusters. . In FIG. 4, "408" is a last symbol of a subframe in which a periodic SRS (type 0 SRS) or an aperiodic SRS (type 1 SRS) can be transmitted.

In this case, the resource in which the DMRS-SRS 407 transmitted by the terminal 3 is located may overlap with the resource in which the DMRS 402 transmitted by the terminal 1 is located. The DMRS-SRS 407 and the DMRS 402 may be orthogonal to each other to distinguish the DMRS-SRS 407 transmitted by the terminal 3 and the DMRS 402 transmitted by the terminal 1.

In the case of FIGS. 3 and 4, since the subframe in which the DMRS-SRS is transmitted is the same as the subframe in which the uplink data is transmitted, information about the subframe in which the DMRS-SRS is transmitted may not be needed. That is, the above-described srs-SubframeConfig and srs-ConfiguraitonIndex parameter information may not be necessary.

The resource block through which the DMRS-SRS is transmitted is included in resource allocation information included in the uplink DCI. That is, as described above, the resource allocation information included in the uplink DCI is information of type 1 including both information on a resource block group in which uplink data is transmitted and a resource block group in which DMRS-SRS is transmitted. In this way, the resource block to which the DMRS-SRS is transmitted can be dynamically allocated. Therefore, the aforementioned C _SRS , B _SRS , n _RRC parameter information may not be necessary.

Since the DMRS-SRS using the DMRS transmission interval is transmitted using all subcarriers like the DMRS, information on the transmission comb may not be required. Therefore, the above k _TC parameter information may not be necessary.

Cyclic delay information for generating a sequence of the DMRS-SRS may follow the indication of the DCI format. The cyclic delay information included in the DCI format is used for generating a sequence of DMRS transmitted with uplink data allocation (see Equation 2 and Table 12), and the same information may be used for generating a sequence of DMRS-SRS. That is, the same sequence information may be applied to DMRS and DMRS-SRS transmission transmitted with uplink data. Therefore, separate information for generating a DMRS-SRS sequence may not be required. Meanwhile, when the DMRS-SRS and the DMRS of another terminal are transmitted at the same location as shown in FIG. 4, sequence information may be limited for orthogonalization between them.

Meanwhile, the cyclic delay information used for generating the sequence of the DMRS-SRS may be different from the cyclic delay information used for generating the sequence of the DMRS, and in this case, the cyclic delay information used for generating the sequence of the DMRS-SRS is higher. It may be delivered through layer signaling (RRC signaling).

In addition, since the DMRS-SRS transmission is a one-time transmission, srsHoppingBandwidth and duration parameter information may not be necessary.

Meanwhile, information on the number of antenna ports among the above-described parameters for type 0 and type 1 SRS may be required. The number of antenna ports may be delivered through higher layer signaling (RRC signaling).

In addition, a parameter may be required to determine which of the two clusters determined by the resource allocation information in the DCI will be used for the uplink data and which cluster will be used for the DMRS-SRS. In addition, whether the DMRS-SRS is transmitted in the DMRS transmission space of the first slot, in the DMRS transmission space of the second slot, or in both of the DMRS transmission spaces of two slots within one subframe Parameters for determining may be required.

Comparing the information required for the SRS transmission and the instruction method in the aperiodic SRS and DMRS-SRS is shown in Table 15 below.

TABLE 15

On the other hand, as will be described later, the information on the cluster or slot for transmitting the DMRS-SRS may be included in the DCI.

According to an embodiment, transmission of the DMRS-SRS may be indicated by using an SRS request field included in DCI formats 0 and 4.

In order to transmit the aperiodic SRS (type 1 SRS) described above, the UE must first receive a signal for the aperiodic SRS configuration through higher layer signaling (RRC signaling), and then the SRS request field included in the DCI format transmits the SRS. Should be indicated. SRS transmission through the DMRS space follows the same method.

First, the UE receives a signal for aperiodic SRS configuration or DMRS-SRS configuration through higher layer signaling (RRC signaling). The UE may receive one of aperiodic SRS configuration or DMRS-SRS configuration from a higher layer for one-time SRS transmission. The transmitting end may transmit only one of the two configurations, or may transmit both configurations and indicate a configuration that is dual activated.

When the UE receives the aperiodic SRS configuration, the information included therein is shown in Table 9.

When the UE receives the DMRS-SRS configuration, the information included therein includes the number of antenna ports, information indicating a cluster in which the DMRS-SRS is transmitted among two allocated resource clusters, and one subframe, as shown in Table 14. It may include information indicating which DMRS-SRS is transmitted at a DMRS transmission position located in each of the DMRS transmission positions located in two slots in the slot.

After the UE receives the DMRS-SRS configuration, the UE may transmit the DMRS-SRS according to the indication by the SRS request field included in the DCI format.

If the transmission format for uplink allocation of the UE is DCI format 0, the SRS request field is configured with 1 bit. As shown in Table 16, when the SRS request field is '0', DMRS-SRS transmission may be deactivated, and when the SRS request field is '1', DMRS-SRS transmission may be activated.

[Table 16]

In this case, uplink data and DMRS are transmitted in which of two clusters allocated by the DCI format and in which cluster the DMRS-SRS is transmitted may be transmitted through higher layer signaling. In addition, in which of two slots located in one subframe, DMRS-SRS is transmitted or DMRS-SRS is transmitted in both slots may be transmitted through higher layer signaling.

As shown in FIG. 3, if there is a place in the time-frequency space that is not allocated to another terminal in the cell, the corresponding resource may be used for DMRS-SRS transmission 305, and at this time, the cyclic shift no limits.

On the other hand, as shown in FIG. 4, when the resource is used for DMRS-SRS transmission in a place allocated to another UE in a cell in a time-frequency space, a cyclic delay different from that used for DMRS of another UE Assigning a value for DMRS-SRS may enable DMRS-SRS transmission. At this time, in order to ensure orthogonality between the DMRS 402 and the DMRS-SRS 407 using different cyclic delay values, the frequency band for transmitting the DMRS 402 and the frequency band for transmitting the DMRS-SRS 407 coincide with each other. shall. Meanwhile, when two slots in a subframe are used to transmit a DMRS-SRS and an orthogonal cover code (OCC) mapping scheme is applied, a frequency band for transmitting the DMRS 402 and a frequency band for transmitting the DMRS-SRS 407 are determined. Even if they do not match, orthogonality is guaranteed and the DMRS-SRS 407 can be transmitted. However, in this case, there is a limitation that DMRS-SRS should be transmitted in both slots in the subframe.

On the other hand, when the transmission format for uplink allocation of the terminal is DCI format 4, the SRS request field is composed of 2 bits. If the SRS request field is '00', DMRS-SRS transmission is deactivated. If the request fields are '01' to '11', the DMRS-SRS transmission method mapped to each SRS request field value may be followed. For example, as shown in Table 17 below, when the SRS request field is '00', DMRS-SRS transmission is deactivated. When the SRS request field is '01', DMRS-SRS is transmitted through a higher frequency cluster among two clusters. If the SRS request field is '10', DMRS-SRS may be transmitted through a cluster having a lower frequency among the two clusters. In this case, information on which cluster the DMRS-SRS is to be transmitted may be omitted in higher layer signaling.

TABLE 17

Alternatively, the SRS request field may indicate in which slot a DMRS-SRS is transmitted. For example, in case of '01', DMRS-SRS may be set to be transmitted in the first slot, in case of '10', in the second slot, and in case of '11'. In this case, the information on which slot the DMRS-SRS is transmitted may be omitted in higher layer signaling.

As shown in FIG. 3, if there is a place in the time-frequency space that is not allocated to another terminal in the cell, the corresponding resource may be used for DMRS-SRS transmission 305, and at this time, the cyclic shift no limits.

On the other hand, as shown in FIG. 4, when the resource is used for DMRS-SRS transmission in a place allocated to another UE in a cell in a time-frequency space, a cyclic delay different from that used for DMRS of another UE Assigning a value for DMRS-SRS can enable DMRS-SRS transmission. At this time, in order to ensure orthogonality between the DMRS 402 and the DMRS-SRS 407 using different cyclic delay values, the frequency band for transmitting the DMRS 402 and the frequency band for transmitting the DMRS-SRS 407 coincide with each other. shall. Meanwhile, when two slots in a subframe are used to transmit a DMRS-SRS and an orthogonal cover code (OCC) mapping scheme is applied, a frequency band for transmitting the DMRS 402 and a frequency band for transmitting the DMRS-SRS 407 are determined. Even if they do not match, orthogonality is guaranteed and the DMRS-SRS 407 can be transmitted. However, in this case, there is a limitation that DMRS-SRS should be transmitted in both slots in the subframe.

According to another embodiment, transmission of the DMRS-SRS may be indicated by adding a new 1 bit or n bit (n ≧ 2) to DCI format 0 or 4.

The terminal receives both the information on the configuration of the aperiodic SRS (type 1 SRS) and the information on the configuration of the DMRS-SRS (type 2 SRS) through higher layer signaling.

DCI format 0 or 4 may include an additional field for triggering DMRS-SRS in addition to the 1 or 2 bit SRS request field for triggering aperiodic SRS. Thus, DCI can independently trigger aperiodic SRS and DMRS-SRS. Aperiodic SRS transmission may be transmitted through an aperiodic SRS subframe first appearing after four subframes based on the subframe receiving the DCI. DMRS-SRS transmission may be transmitted through a resource allocated through the DCI format.

The additional field for DMRS-SRS in DCI may be 1 bit. If the additional field is '0', DMRS-SRS transmission may be deactivated, and if it is '1', DMRS-SRS transmission may be activated. In this case, information on the cluster and the slot for DMRS-SRS transmission may be delivered through higher layer signaling such as RRC.

The additional field for DMRS-SRS in DCI may be 2 bits. If the additional field is '00', DMRS-SRS transmission is deactivated. If '01', DMRS-SRS may be transmitted in a high frequency cluster, and if '10', DMRS-SRS may be transmitted in a low frequency cluster. have. In this case, the information on the slot for DMRS-SRS transmission may be delivered through higher layer signaling such as RRC.

The size of the additional field may be another size. For example, the additional field is 3 bits and may include all information on whether the DMRS-SRS is activated, information on the cluster where the DMRS-SRS is transmitted, and information about the slot where the DMRS-SRS is transmitted.

According to another embodiment, whether to transmit aperiodic SRS or DMRS-SRS may be indicated through the DCI.

The terminal receives information of a parameter set for aperiodic SRS (type 1 SRS) transmission and a parameter set for DMRS-SRS (type 2 SRS) transmission through higher layer signaling (RRC signaling).

The SRS request field in the DCI may not only activate the SRS transmission but also indicate a parameter set for aperiodic SRS and a parameter set for DMRS-SRS. For example, the SRS request field of DCI format 1 is 2 bits instead of 1 bit, and if '00', SRS transmission is disabled, and if '01' to '11', the parameter set and DMRS- for aperiodic SRS are Indicates one of up to three parameter sets, including the parameter set for the SRS. For example, '01' triggers an aperiodic SRS, '10' triggers a DMRS-SRS through a high frequency cluster, and '11' triggers a DMRS-SRS through a low frequency cluster. In addition, configuration information required for each SRS transmission may be specified in a parameter set. Meanwhile, the SRS request field of DCI format 4 is 2 bits and one of aperiodic SRS and DMRS-SRS may be triggered in the same manner.

5 is a configuration diagram of a communication system according to an embodiment of the present invention. Referring to FIG. 5, the communication system includes a transmitter 510 and a terminal 520. The transmitter 510 includes an upper layer signal transmitter 512, a control information transmitter 514, and an uplink receiver 516. The terminal 520 includes an upper layer signal receiver 522, a control information receiver 524, and an uplink transmitter 526.

The higher layer signal transmitter 512 may transmit the parameters required for the above-described DMRS-SRS transmission to the terminal 520 through higher layer signaling such as RRC. The parameter transmitted through higher layer signaling may include information on a contiguous resource block in which the DMRS-SRS is transmitted, information on a slot in which the DMRS-SRS is transmitted, and information on the number of antenna ports.

The control information transmitter 514 may transmit DCI format 0 or 4, which is control information for uplink allocation, to the terminal 520 through the PDCCH.

The DCI format may include a field for resource allocation for two consecutive resource blocks spaced apart from each other. One contiguous resource block may be used to transmit uplink data, and another contiguous resource block may be used to transmit SRS using the aforementioned DMRS transmission space. In which contiguous resource blocks, the SRS may be transmitted may be indicated through higher layer signaling. In addition, in which slot, the SRS may be transmitted may be indicated through higher layer signaling.

The DCI format may include a field for requesting DMRS-SRS transmission. The field for requesting DMRS-SRS transmission may be a field such as a field for requesting aperiodic SRS transmission. Whether to transmit aperiodic SRS or DMRS-SRS is determined in advance, and when determined to transmit DMRS-SRS, the SRS request field may be used for DMRS-SRS transmission. Alternatively, the DCI format may include both a field requesting an aperiodic SRS and a field requesting a DMRS-SRS. Thus, aperiodic SRS and DMRS-SRS can be triggered independently. Alternatively, one SRS request field may be used to trigger aperiodic SRS and DMRS-SRS. Aperiodic SRS may be triggered or DMRS-SRS may be triggered according to a value in the SRS request field.

The field for requesting DMRS-SRS transmission may be 1 bit to indicate whether to transmit DMRS-SRS. Alternatively, the field for requesting DMRS-SRS transmission may be two bits or more including information on a contiguous resource block in which DMRS-SRS is transmitted in addition to whether DMRS-SRS is transmitted. In this case, the information on the contiguous resource blocks through which the DMRS-SRS is transmitted may not be transmitted through higher layer signaling.

The DCI format includes cyclic delay information for DMRS, which is a reference signal used for demodulating an uplink signal. The circular delay information of the DMRS may be used for the DMRS-SRS. When the DMRS-SRS of one terminal and the DMRS of another terminal are transmitted in the same resource, a cyclic delay or an OCC may be limited for orthogonalization between them.

The uplink receiver 516 may receive an SRS transmitted through a DMRS transmission space on a frequency resource different from the uplink together with the uplink signal transmitted by the terminal 520.

The higher layer receiver 522 may receive a higher layer signal such as an RRC transmitted by the transmitter 510. Higher layer signaling may include configuration information for SRS transmission through a DMRS transmission space in a time frequency resource.

The control information receiver 524 may receive DCI format 0 or 4, which is control information for uplink allocation, through the PDCCH.

If the resource allocation information included in the DCI includes information on two consecutive resource blocks spaced apart from each other, and the SRS transmission through the DMRS transmission space is triggered in the time frequency resource, the uplink transmitter 526 is one Uplink data is transmitted in a contiguous resource block, and SRS is transmitted in a DMRS transmission space in another contiguous resource block.

6 illustrates one embodiment of a method executed in the system of FIG.

Referring to FIG. 6, the transmitter 510 transmits information on SRS (DMRS-SRS) transmission through a DMRS transmission space through higher layer signaling such as RRC (S610). The information on the DMRS-SRS transmission may include information on a contiguous resource block in which the DMRS-SRS is transmitted, information on a slot in which the DMRS-SRS is transmitted, and information on the number of antenna ports.

Next, the transmitter 510 transmits DCI through the PDCCH as control information for uplink allocation (S620). The DCI may include information for triggering the DMRS-SRS and information about two consecutive resource blocks spaced apart from each other for specifying a resource to which the DMRS-SRS is transmitted.

Upon receiving the RRC signaling and the DCI in steps S610 and S620, the terminal 520 transmits uplink data through one contiguous resource block of two contiguous resource blocks allocated by the DCI and the other contiguous resource. The SRS is transmitted through the DMRS transmission space of the block (S630).

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

Claims (36)

Transmitting, by the terminal, configuration information of a SRS (Sounding Reference Signal) transmitted by the terminal in a DMRS transmission space of a resource block different from the resource block transmitting uplink data; And
And transmitting control information including information about two consecutive resource blocks spaced apart from each other. The method of claim 1,
The configuration information includes information on a contiguous resource block in which the SRS transmitted in the DMRS transmission space is transmitted, and information on a slot in which the SRS transmitted in the DMRS transmission space is transmitted. SRS transmission control method. The method of claim 1,
The control information further includes SRS request information having information on whether SRS transmission is activated in the DMRS transmission space. The method of claim 1,
The control information further includes SRS request information having information on whether SRS transmission is transmitted in the DMRS transmission space and information on a contiguous resource block in which the SRS is transmitted in the DMRS transmission space. SRS transmission control method of the transmitting end. The method of claim 1,
The control information further includes information on whether to activate aperiodic SRS transmission and information on whether to activate the SRS transmission transmitted in the DMRS transmission space. The method of claim 1,
The control information further comprises information on whether one of aperiodic SRS transmission and SRS transmission transmitted in the DMRS transmission space is activated. The method of claim 1,
The SRS transmitted in the DMRS transmission space is a sequence generation using the cyclic delay information used for generating a sequence of the DMRS for demodulating the uplink data. The method of claim 7, wherein
When the DMRS of another terminal is transmitted through the DMRS transmission space, the cyclic delay information for generating a sequence of the SRS transmitted in the DMRS transmission space and the cyclic delay information for generating a sequence of the DMRS of the other terminal are different from each other. The SRS transmission control method of the transmitting end, characterized in that the frequency band of the SRS transmitted in the DMRS transmission space and the frequency band of the DMRS of the other terminal. The method of claim 7, wherein
When the DMRS of another terminal is transmitted through the DMRS transmission space, the SRS transmitted in the DMRS transmission space is transmitted in two slots, and the SRS transmitted in the DMRS transmission space is different from the DMRS of the other terminal. SRS transmission control method of the transmitting end, characterized in that the mapping using (Cover Code). Higher layer signal transmission for transmitting configuration information of a sounding reference signal (SRS) transmitted by the terminal in a DMRS (DeModulation Reference Signal) transmission space of a resource block different from that of the terminal for transmitting uplink data to the terminal part; And
And a control information transmitter for transmitting control information including information about two consecutive resource blocks spaced apart from each other. 11. The method of claim 10,
The configuration information includes information on a contiguous resource block in which the SRS transmitted in the DMRS transmission space is transmitted, and information on a slot in which the SRS transmitted in the DMRS transmission space is transmitted. 11. The method of claim 10,
The control information further comprises SRS request information having information on whether to activate the SRS transmission transmitted in the DMRS transmission space. 11. The method of claim 10,
The control information further includes SRS request information having information on whether SRS transmission is transmitted in the DMRS transmission space and information on a contiguous resource block in which the SRS is transmitted in the DMRS transmission space. Transmission stage. 11. The method of claim 10,
The control information further comprises information on whether or not to activate aperiodic SRS transmission and information on whether to activate the SRS transmission transmitted in the DMRS transmission space. 11. The method of claim 10,
The control information further comprises information on whether one of aperiodic SRS transmission and SRS transmission transmitted in the DMRS transmission space is activated. 11. The method of claim 10,
SRS transmitted in the DMRS transmission space is generated by using the cyclic delay information used for generating a sequence of the DMRS for demodulating the uplink data. 17. The method of claim 16,
When the DMRS of another terminal is transmitted through the DMRS transmission space, the cyclic delay information for generating a sequence of the SRS transmitted in the DMRS transmission space and the cyclic delay information for generating a sequence of the DMRS of the other terminal are different from each other. And a frequency band of the SRS transmitted in the DMRS transmission space and a frequency band of the DMRS of the other terminal coincide. 17. The method of claim 16,
When the DMRS of another terminal is transmitted through the DMRS transmission space, the SRS transmitted in the DMRS transmission space is transmitted in two slots, and the SRS transmitted in the DMRS transmission space is different from the DMRS of the other terminal. A transmission stage, characterized in that the mapping using (Cover Code). Receiving, by a terminal, configuration information of a sounding reference signal (SRS) transmitted by the terminal in a demodulation reference signal (DMRS) transmission space of a resource block different from a resource block for transmitting uplink data;
Receiving control information including information about two consecutive resource blocks spaced apart from each other; And
And transmitting the SRS through a DMRS transmission space of one consecutive resource block of the two consecutive resource blocks based on the configuration information. The method of claim 19,
The configuration information includes information on a contiguous resource block in which the SRS transmitted in the DMRS transmission space is transmitted, and information on a slot in which the SRS transmitted in the DMRS transmission space is transmitted. Transmission control method. The method of claim 19,
The control information further comprises SRS request information having information on whether to activate the SRS transmission transmitted in the DMRS transmission space. The method of claim 19,
The control information further includes SRS request information having information on whether SRS transmission is transmitted in the DMRS transmission space and information on a contiguous resource block in which the SRS is transmitted in the DMRS transmission space. SRS transmission method of the terminal. The method of claim 19,
The control information further includes information on whether to activate aperiodic SRS transmission and information on whether to activate SRS transmission transmitted in the DMRS transmission space. The method of claim 19,
The control information further includes information on whether one of aperiodic SRS transmission and SRS transmission transmitted in the DMRS transmission space is activated. The method of claim 19,
The SRS transmitted in the DMRS transmission space is a sequence generation using the cyclic delay information used for generating a sequence of the DMRS for demodulating the uplink data. The method of claim 25,
When the DMRS of another terminal is transmitted through the DMRS transmission space, the cyclic delay information for generating a sequence of the SRS transmitted in the DMRS transmission space and the cyclic delay information for generating a sequence of the DMRS of the other terminal are different from each other. The frequency band of the SRS transmitted in the DMRS transmission space and the frequency band of the DMRS of the other terminal coincides with the terminal. The method of claim 25,
When the DMRS of another terminal is transmitted through the DMRS transmission space, the SRS transmitted in the DMRS transmission space is transmitted in two slots, and the SRS transmitted in the DMRS transmission space is different from the DMRS of the other terminal. SRS transmission method of the terminal characterized in that the mapping using the (Cover Code). An upper layer signal receiving unit configured to receive configuration information of a sounding reference signal (SRS) transmitted by the terminal in a DMRS transmission space of a resource block different from that of the terminal for transmitting uplink data;
A control information receiver configured to receive control information including information about two consecutive resource blocks spaced apart from each other; And
And an uplink transmitter configured to transmit SRS through a DMRS transmission space of one consecutive resource block of the two consecutive resource blocks based on the configuration information. 29. The method of claim 28,
The configuration information, the terminal characterized in that it comprises information on the continuous resource block is transmitted SRS transmitted in the DMRS transmission space, and information on the slot is transmitted SRS transmitted in the DMRS transmission space. 29. The method of claim 28,
The control information terminal further comprises SRS request information having information on whether to activate the SRS transmission transmitted in the DMRS transmission space. 29. The method of claim 28,
The control information further includes SRS request information having information on whether SRS transmission is transmitted in the DMRS transmission space and information on a contiguous resource block in which the SRS is transmitted in the DMRS transmission space. Terminal. 29. The method of claim 28,
The control information further comprises information on whether to activate aperiodic SRS transmission and information on whether to activate the SRS transmission transmitted in the DMRS transmission space. 29. The method of claim 28,
The control information further comprises information on whether one of aperiodic SRS transmission and SRS transmission transmitted in the DMRS transmission space is activated. 29. The method of claim 28,
The SRS transmitted in the DMRS transmission space is a sequence generated using the cyclic delay information used for generating a sequence of the DMRS for demodulating the uplink data. 35. The method of claim 34,
When the DMRS of another terminal is transmitted through the DMRS transmission space, the cyclic delay information for generating a sequence of the SRS transmitted in the DMRS transmission space and the cyclic delay information for generating a sequence of the DMRS of the other terminal are different from each other. And a frequency band of the SRS transmitted in the DMRS transmission space and a frequency band of the DMRS of the other terminal coincide. 35. The method of claim 34,
When the DMRS of another terminal is transmitted through the DMRS transmission space, the SRS transmitted in the DMRS transmission space is transmitted in two slots, and the SRS transmitted in the DMRS transmission space is different from the DMRS of the other terminal. Cover Code), characterized in that the terminal is mapped.

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