KR20120048445A - Method and apparatus for transmitting and receiving aperiodic reference signal - Google Patents

Abstract

A method and apparatus for transmitting and receiving an aperiodic reference signal.
According to an embodiment of the present disclosure, a method of receiving an aperiodic reference signal may include determining, by the apparatus for receiving a non-periodic reference signal, a radio resource region that can be calculated based on environmental information of the apparatus for transmitting a reference signal, the aperiodic reference signal in the radio resource region. And transmitting, to the RS, the indication information instructing to transmit the signal, and receiving the aperiodic RS from the RS signal in the radio resource region.

Description

Method and apparatus for transmitting and receiving an aperiodic reference signal {Method and Apparatus for Transmitting and Receiving Aperiodic Reference Signal}

The present disclosure relates to a wireless communication system, and more particularly, to an aperiodic reference signal using inherent information so as to quickly and effectively indicate an aperiodic transmission of a reference signal for measuring or estimating a state of a resource in an OFDMA wireless communication system. It is to provide a method and apparatus for transmitting and receiving.

As communication systems have evolved, consumers, such as businesses and individuals, have used a wide variety of wireless terminals.

In the current mobile communication systems such as 3GPP, Long Term Evolution (LTE), LTE-A (LTE Advanced), etc., it is a high-speed, high-capacity communication system that can transmit and receive various data such as video and wireless data beyond voice-oriented services. Not only is the development of technology capable of transmitting large amounts of data comparable to wired communication networks, but also the proper error detection method to improve system performance by minimizing the reduction of information loss and increasing system transmission efficiency has become an essential element. .

In addition, in various current communication systems, various signals are used to provide information on a communication environment to an external device through uplink or downlink, and reference signals or reference signals are used as one example of the signal. .

For example, in an LTE system, which is one of mobile communication methods, a channel reference (channel measurement or channel estimation) indicating a channel state of a user equipment (hereinafter referred to as UE or UE) during uplink transmission. Transmitting a sounding reference signal as a reference signal to the base station apparatus. Meanwhile, in order to identify channel information during downlink transmission, a cell-specific reference signal (CRS), which is a reference signal, is transmitted every subframe.

On the other hand, these reference signals (Reference Signals) are commonly generated by the transmission apparatus of the reference signal, that is, the UE in the case of the uplink reference signal, the base station apparatus in the case of the downlink reference signal periodically and transmitted to the reference signal receiving apparatus .

Recently, however, a discussion has been made to transmit a channel estimation reference signal aperiodically due to flexibility of a communication system, but a specific method thereof has not been determined. In consideration of such a situation, in the current communication system, a specific transmission scheme for the aperiodic channel estimation reference signal is required.

An embodiment of the present disclosure provides a technique for transmitting and receiving configuration information of a reference signal by including indication information in a physical channel in aperiodic transmission of a reference signal.

In addition, an embodiment of the present disclosure provides a non-periodic transmission technique of a reference signal for measuring or estimating a channel state of a terminal in a communication system.

Since aperiodic SRS transmission aims to acquire uplink channel information in a short time, dynamic sounding resource allocation should be possible. To this end, an embodiment of the present specification allows all or part of configuration information related to aperiodic SRS transmission to be transmitted quickly through the physical layer, thereby controlling the transmission of the aperiodic SRS.

In addition, an embodiment of the present disclosure provides a technique related to the transmission and reception of the aperiodic reference signal based on the implicit information calculation so that the configuration information for controlling the transmission of the reference signal for aperiodic channel measurement can be delivered to the user terminal more quickly. .

In addition, the present specification provides a configuration information configuration technique for controlling the transmission of the reference signal in transmitting the aperiodic reference signal through the multi-antenna uplink allocation.

According to an embodiment of the present disclosure, a method of receiving an aperiodic reference signal may include determining, by the apparatus for receiving a non-periodic reference signal, a radio resource region that can be calculated based on environmental information of the apparatus for transmitting a reference signal, in the radio resource region. And transmitting, to the RS, the indication information instructing to transmit the signal, and receiving the aperiodic RS from the RS in the radio resource region.

In another embodiment of the present disclosure, a method of transmitting an aperiodic reference signal may include receiving, by a reference signal transmitter, indication information indicating transmission of an aperiodic reference signal from a reference signal receiver, wherein the aperiodic reference signal is transmitted. Calculating radio resource region information to be used using environment information, and transmitting aperiodic reference signal to the reference signal receiving apparatus using the radio resource region information and the indication information.

An apparatus for receiving an aperiodic reference signal according to another embodiment of the present specification includes a control unit for determining a radio resource region that can be calculated based on environment information of a reference signal transmitter, and instructing the aperiodic reference signal to be transmitted in the radio resource region. A coding unit for generating a radio control signal including instruction information, and a transceiver for transmitting the radio control signal to the reference signal transmitter and receiving the aperiodic reference signal from the reference signal transmitter in the radio resource region. Include.

An apparatus for transmitting an aperiodic reference signal according to another embodiment of the present specification includes a transceiver for receiving indication information indicating transmission of an aperiodic reference signal from a reference signal receiving apparatus and transmitting an aperiodic reference signal, the aperiodic A control unit for calculating radio resource region information to which a reference signal is to be transmitted using environment information, and a reference signal generation unit for generating an aperiodic reference signal using the indication information, wherein the transceiver unit receives the information calculated by the control unit. The non-periodic reference signal is transmitted to the reference signal receiver.

1 illustrates a wireless communication system to which embodiments of the present specification are applied.
2 and 3 are tables showing configuration information of an SRS subframe that can be used by one embodiment of the present specification.
4 is a diagram illustrating configuration information on an SRS bandwidth.
5 and 6 illustrate examples of information that can be set in connection with SRS transmission in the present specification.
7 to 10 are diagrams illustrating setting of an SRS bandwidth and an setting of an SRS bandwidth according to the number of resource blocks according to an embodiment of the present specification.
FIG. 11 is a diagram in which antenna configuration information for A-SRS is used as A-SRS transmission bandwidth information according to an embodiment of the present specification.
FIG. 12 is a first diagram of using antenna configuration information for A-SRS according to an embodiment of the present specification as allocated band information including A-SRS transmission bandwidth.
FIG. 13 is a second diagram inherently using antenna configuration information for A-SRS according to another embodiment of the present specification as allocation band information including A-SRS transmission bandwidth.
14 is a diagram illustrating frequency division of each antenna configuration according to a transmissionComb-ap value according to an embodiment of the present specification.
FIG. 15 is a diagram illustrating a frequency domain in which an A-SRS is transmitted according to an embodiment of the present specification.
FIG. 16 is a diagram illustrating calculation of A-SRS frequency resources that can be calculated by a UE or a base station by applying Equations 2 and 3 when CSRS of FIG. 12 and Table 2 are 1 according to an embodiment of the present specification.
17 and 18 are diagrams illustrating cyclic shift settings for A-SRS transmission according to an embodiment of the present specification.
19 is a diagram illustrating a process of receiving an aperiodic reference signal using embedded radio resource region information in the apparatus for receiving a reference signal according to an embodiment of the present specification.
20 is a diagram illustrating a process of transmitting an aperiodic reference signal using embedded radio resource region information in the apparatus for transmitting a reference signal according to an embodiment of the present specification.
21 is a diagram illustrating a configuration of an apparatus for receiving a reference signal according to an embodiment of the present specification.
22 is a diagram illustrating a configuration of an apparatus for transmitting a reference signal according to an embodiment of the present specification.

Hereinafter, some embodiments of the present invention will be described in detail through 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.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), (b), can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. If a component is described as being "connected", "coupled" or "connected" to another component, that component may be directly connected to or connected to that other component, but there may be another configuration between each component. It is to be understood that the elements may be "connected", "coupled" or "connected".

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

Wireless communication systems are widely deployed to provide various communication services such as voice and packet data.

Referring to FIG. 1, a wireless communication system includes a user equipment (UE) 10 and a base station 20 (BS). The terminal 10 and the base station 20 apply an extended channel-referenced reference signal generation technique as described in the following embodiments, which will be described in detail with reference to FIG. 3 or below.

Terminal 10 in the present specification is a generic concept that means a user terminal in wireless communication, WCDMA, UE (User Equipment) in LTE, HSPA, etc., as well as MS (Mobile Station), UT (User Terminal) in GSM ), SS (Subscriber Station), wireless device (wireless device), etc. should be interpreted as including the concept.

A base station 20 or a cell generally refers to a fixed station communicating with the terminal 10 and includes a Node-B, an evolved Node-B, and a Base Transceiver. May be called other terms such as System, Access Point, Relay Node

That is, in the present specification, the base station 20 or the cell should be interpreted in a comprehensive sense indicating some areas covered by the base station controller (BSC) in the CDMA, the NodeB of the WCDMA, and the like. It is meant to cover various coverage areas such as microcell, picocell, femtocell and relay node communication range.

In the present specification, the terminal 10 and the base station 20 are two transmitting and receiving entities used to implement the technology or the technical idea described in the present specification and are used in a comprehensive sense and are not limited by the terms or words specifically referred to.

There is no limitation on the multiple access scheme applied to the wireless communication system. Various multiple access techniques such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), OFDM-FDMA, OFDM-TDMA, OFDM-CDMA Can be used.

A TDD (Time Division Duplex) scheme in which uplink and downlink transmissions are transmitted using different time periods, or an FDD (Frequency Division Duplex) scheme in which they are transmitted using different frequencies can be used.

One embodiment of the present invention is resource allocation in the fields of asynchronous wireless communication evolving into Long Term Evolution (LTE) and LTE-advanced through GSM, WCDMA, HSPA, and synchronous wireless communication evolving into CDMA, CDMA-2000 and UMB. Can be applied to 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.

A wireless communication system to which an embodiment of the present invention is applied may support uplink and / or downlink HARQ, and may use a channel quality indicator (CQI) for link adaptation. In addition, multiple access schemes for downlink and uplink transmission may be different. For example, downlink uses Orthogonal Frequency Division Multiple Access (OFDMA), and uplink uses Single Carrier-Frequency Division Multiple Access (SC-FDMA). ) Is the same as can be used.

The layers of the radio interface protocol between the terminal and the network are based on the lower three layers of the Open System Interconnection (OSI) model, which are well known in communication systems. The physical layer may be divided into a second layer (L2) and a third layer (L3), and the physical layer belonging to the first layer provides an information transfer service using a physical channel.

As one of the current wireless communication methods, a demodulation reference signal (DMRS) and a sounding reference signal (SRS) or 'sound' in LTE (Long Term Evolution) and LTE-Advanced communication systems Ding reference signal 'or' sounding reference signal ') is defined.

In more detail, three reference signals (RS, or reference signals) are defined in downlink, cell-specific reference signals (CRS), and MBSFN reference signals (Multicast / Broadcast over). Single Frequency Network Reference Signal (MBSFN-RS) and UE-specific Reference Signal (UE-specific Reference Signal).

That is, in a wireless communication system, a terminal transmits a reference signal for uplink channel estimation or measurement, which is a type of reference signal, to a single base station in order to deliver uplink channel information to the base station. An example of the channel estimation reference signal may be a sounding reference signal (SRS) used in LTE and LTE-Advanced, which has a function such as a pilot channel for an uplink channel.

In the following specification, a process and method of controlling aperiodic transmission of a reference signal will be described. The reference signal means a signal transmitted between the terminal and the base station. An embodiment of the reference signal will be described with reference to a channel estimation reference signal and a sounding reference signal (SRS), which is an embodiment thereof. However, the present invention is not limited to an SRS or a reference signal for channel estimation or channel measurement. It should be understood as a concept including all kinds of reference signals used in a link or a downlink.

2 and 3 are tables showing configuration information of an SRS subframe that can be used by one embodiment of the present specification.

The transmission subframe of the periodic sounding reference signal (Periodic SRS) is determined by srs-SubframeConfig as shown in 210 of FIG. 2. The srs-SubframeConfig (4-bit) 210 is transmitted in a higher layer as a cell-specific parameter and SRS transmission is possible in the last symbol of a subframe satisfying Equation 1.

[Equation 1]

는 오프셋(offset)이며, 이들은 셀 특이적 파라미터로 정해지거나 srs-SubframeConfig에 따라 미리 정해진 값들일 수 있다. 상기 값을 만족시키는 n_s의 마지막 심볼에 SRS 전송이 가능하다. n_s는 슬롯의 인덱스이다.In Equation 1, T _SFC is a subframe configuration period.

Is an offset, and these may be determined as cell specific parameters or may be predetermined values according to srs-SubframeConfig. SRS transmission is possible on the last symbol of n _s that satisfies the above value. n _s is the index of the slot.

FIG. 2 is a subframe configuration table of sounding reference signals defined in LTE. Each format (srsSubframeConfiguration) is defined as 4 bits, and in each case, a transmission period and an offset of an actual transmission subframe are defined.

는 {2, 3}). 이 경우, 상기 SRS는 각 서브프레임의 가장 마지막 심볼에 송신될 수 있다. 예를 들어, 하나의 서브프레임이 14개의 심볼들(Normal Cyclic Prefix인 경우)로 구성될 경우, 14번째 심볼에서 SRS를 송신하며, 12개의 심볼들(Extended Cyclic Prefix인 경우)로 구성될 경우, 12번째 심볼에서 SRS를 송신한다. 물론, 본 명세서에서 SRS가 송신되는 심볼의 위치가 이에 한정되는 것은 아니다. For example, when the srsSubframeConfiguration value is 8 (1000 in binary), this means that the SRS is transmitted in the second and third subframes every five subframes (T _SFC is 5,

Is {2, 3}). In this case, the SRS may be transmitted in the last symbol of each subframe. For example, when one subframe consists of 14 symbols (in the case of Normal Cyclic Prefix), when the SRS is transmitted in the 14th symbol, and consists of 12 symbols (in the case of Extended Cyclic Prefix), SRS is transmitted in the 12th symbol. Of course, the position of the symbol in which the SRS is transmitted herein is not limited thereto.

According to such an SRS configuration, the SRS may be transmitted periodically per cell (base station) every radio frame or transmission period.

Meanwhile, the base station informs each terminal of the transmission period and offset of the SRS through the SRS configuration index (10-bit) 310 of FIG. 3, which is a UE-specific parameter. The transmission period is one of {2,5,10,20,40,80,160,320}, and the offset has the number of branches equal to the size of the transmission period for each transmission period. For example, when I _SRS = 20, the transmission period is 20ms, and the offset is 3ms, which is the value of I _SRS minus 17.

60 인 경우의 예를 표시한 것으로 도 4에 의하면, C_SRS = 2, B_SRS = 2이면 단말은

의 값을 갖는다. 이는 SRS 전송 대역폭(

)이 4RB를 의미하며 N₂는 다음 SRS 전송을 위한 값으로 사용된다. 다시 설명하면, C_SRS값과 B_SRS값을 이용하여 SRS를 송신할 수 있는 주파수의 대역과, 해당 주파수의 범위(

)가 어느 지점에서 시작할 수 있는지에 대한 정보(N₂)를 설정할 수 있다. 즉, C_SRS = 2, B_SRS = 2이면 전체 4개의 RB(

= 4)에 대해 SRS를 송신하는 것을 의미한다.
4 is a diagram illustrating configuration information on an SRS bandwidth. SRS bandwidth configuration (SRS bandwidth configuration (3-bit), 410) and SRS bandwidth (SRS bandwidth (2-bit), 420). The SRS bandwidth setting (C _SRS ) is a cell-specific parameter and the same value is transmitted to all terminals in the cell. On the other hand, SRS bandwidth B _SRS ) is a UE-specific parameter that can be assigned a different value to each terminal. One of four SRS bandwidths determined by the C _SRSs is selected for the UEs in the cell, and the size of the SRS bandwidth that the UE transmits is determined through the UE-specific parameter B _SRS . C _SRS and B _SRS are parameters transmitted from a higher layer and their values depend on system bandwidth. 4 shows that a resource block (RB) indicating a system bandwidth has a range of 40 <RB (resource block).

In the example of 60, FIG. 4 shows that when C _SRS = 2 and B _SRS = 2, the UE

Has the value of. This is the SRS transmission bandwidth (

) Means 4RB and N ₂ is used as a value for the next SRS transmission. In other words, using the C _SRS value and the B _SRS value, the band of the frequency at which the SRS can be transmitted and the range of the corresponding frequency (

Information N ₂ at which point can be started. That is, if C _SRS = 2 and B _SRS = 2, all four RBs (

= 4) means transmitting the SRS.

5 and 6 illustrate examples of information that can be set in connection with SRS transmission in the present specification. Comb (comb) means that is configured to transmit by dividing the frequency bandwidth in transmitting the SRS. Comb parameter in FIG. 5 means information indicating that the SRS can be transmitted in the even or odd subcarriers in the SRS transmission. For example, Comb0 may refer to an even subcarrier and Comb1 may refer to an odd subcarrier. By using the Comb parameter, two terminals pointing to the same SRS resource on the frequency can be distinguished through a frequency position and an SRS bandwidth.

6 shows a total of eight cyclic shifts. 3 bits of information may be transmitted to indicate the cyclic shift.

In order to transmit the SRS, it is necessary to set various information, that is, an area of a resource to which the SRS is to be transmitted, time information to transmit the SRS, and the like. In addition, in order to transmit an aperiodic SRS, information about such a resource and time needs to be set. In addition, since aperiodic SRS (A-SRS) may need to check fast sounding at any particular point in time, faster information transmission and reception through a physical channel may be required than transmitting and receiving information in terms of RRC (Radio Resource Control). have.

In the physical channel, transmission and reception of information related to uplink and information related to downlink may exist. In an embodiment of the present disclosure, we will look at including A-SRS-related information within 2 to 3 bits due to the limitation of information that can be loaded on a physical channel. Of course, the present invention can be applied to a larger range of information (4 bits or more) in addition to 2-3 bits in applying an embodiment of the present specification. However, each embodiment of the present invention will be described based on the minimum usable bit size.

An embodiment of a physical channel to include the 2 to 3 bits will be described based on DCI format 4 for uplink multiple input multiple output. New 2-bit or 3-bit can be added to DCI format 4 for aperiodic SRS transmission. In this case, 2-bit can provide four kinds of information (4-state) and 3 bit can provide eight kinds of information. (8-state) can be provided. This provideable information may be used for A-SRS purposes.

According to one embodiment of the present specification, one of these pieces of information (1-state) may be used for indicating not to send an A-SRS transmission, so the remaining three pieces of information or seven pieces of information may be used. RRC-configured Aperiodic SRS parameter sets may be distinguished using information (3-state or 7-state) or may be used as information indicating a set of parameters.

One embodiment of the parameters to be configured for A-SRS transmission is the value of the cyclic shift (cyclicshift-ap), transmission comb (ap), bandwidth (srs-Bandwidth-ap), frequency start position (freqDomainPosition-). ap), and antenna configuration (srsantennaconfig-ap). In order to configure the upper parameters into a configuration parameter set consisting of three kinds of information (3-state) or seven kinds of information (7-state), each parameter is efficiently combined for the transmission environment. It is necessary to do In an embodiment of the present specification, DCI is configured by configuring an optimal A-SRS configuration parameter set by applying configuration information of the A-SRS transmit antenna and periodic SRS (periodic SRS) transmission parameters. We will look at a method and structure for enabling efficient resource allocation of A-SRS through format 4.

, N_b)을 보여주고 있다. 여기서 b는 SRS 대역폭 인덱스(bandwidth index),

는 SRS 전송 대역폭의 리소스 블록(resource block) 단위의 크기를 가리킨다. N_b는 주기적 SRS에서 다음 전송을 위해 필요한 값이다. 7 to 10 illustrate values determined by the SRS bandwidth configuration and the SRS bandwidth according to the number of uplink resource blocks according to an embodiment of the present specification.

, N _b ). Where b is the SRS bandwidth index,

Indicates the size of a resource block unit of the SRS transmission bandwidth. N _b is a value required for the next transmission in the periodic SRS.

(리소스 블록의 개수)이 80~110인 경우(

) SRS-대역폭의 설정(C_SRS)과 SRS-대역폭(B_SRS)에 의해 결정되는 값들(

, N_b)을 보여주고 있다.7 is an uplink bandwidth (uplink bandwidth) which is one embodiment of the present specification

(Number of resource blocks) is 80 ~ 110 (

Values determined by the setting of the SRS-bandwidth (C _SRS ) and the SRS-bandwidth (B _SRS )

, N _b ).

(리소스 블록의 개수)이 80~110인 경우(

) SRS-대역폭의 설정(C_SRS)과 SRS-대역폭(B_SRS)에 의해 결정되는 값들(

, N_b)을 보여주고 있다.8 is an uplink bandwidth of an embodiment of the present disclosure

(Number of resource blocks) is 80 ~ 110 (

Values determined by the setting of the SRS-bandwidth (C _SRS ) and the SRS-bandwidth (B _SRS )

, N _b ).

(리소스 블록의 개수)이 80~110인 경우(

) SRS-대역폭의 설정(C_SRS)과 SRS-대역폭(B_SRS)에 의해 결정되는 값들(

, N_b)을 보여주고 있다.9 is an uplink bandwidth (uplink bandwidth) which is one embodiment of the present specification

(Number of resource blocks) is 80 ~ 110 (

Values determined by the setting of the SRS-bandwidth (C _SRS ) and the SRS-bandwidth (B _SRS )

, N _b ).

(리소스 블록의 개수)이 80~110인 경우(

) SRS-대역폭의 설정(C_SRS)과 SRS-대역폭(B_SRS)에 의해 결정되는 값들(

, N_b)을 보여주고 있다.
10 is an uplink bandwidth (uplink bandwidth) which is one embodiment of the present specification

(Number of resource blocks) is 80 ~ 110 (

Values determined by the setting of the SRS-bandwidth (C _SRS ) and the SRS-bandwidth (B _SRS )

, N _b ).

As shown in FIG. 2 to FIG. 10, the information required for transmitting the SRS varies. Therefore, there is a limit to the amount of information that can be contained in the physical channel to use the physical channel to set all of this information for transmitting the A-SRS. Therefore, when considering the A-SRS parameters, it is impossible to represent all parameters in three or seven states (3-state to 7-state). Therefore, in the present specification, some parameters may be implicitly allocated according to the situation of the terminal. In addition, the present invention will describe a method of including and transmitting parameters other than internally allocated information in a physical channel (method of transmitting using 3-state to 7-state-explicit).

First, a case of implicitly assigning transmission numbers and A-SRS parameters of multiple antennas according to the first embodiment of the present specification will be described.

,

그리고

이다. 여기서

는 도 7~10에서 살펴본 SRS 대역폭 파리미터의 값(bandwidth parameter 값, B_SRS)인 k에 따른 SRS 전송대역을 의미한다. 본 명세서의 일 실시예에 의할 경우, A-SRS 전송 안테나의 개수가 증가할 경우 전송 파워(Transmission Power)는 낮아지는 상관성을 고려한다. 즉, 안테나 개수가 1개인 경우(1TX) 전송 파워가 높은 것을 고려하여 대역폭을 크게 하고, 안테나 개수가 2개(2TX), 4개(4TX)가 될 경우, 전송 대역폭을 적게 하도록 하는 구성에 해당한다.
When A-SRS is transmitted through multiple antennas, the transmit power of each antenna is affected by the number of transmit antennas. Therefore, when obtaining uplink channel information through the sounding signal, it is preferable to determine the A-SRS transmission band of each antenna in consideration of the transmission power of each antenna for accurate channel measurement. In consideration of this, the allocation of the transmission band of each antenna according to the number of A-SRS transmit antennas may be represented as in the embodiment of FIG. 11. When the number of A-SRS transmit antennas is 1,2 and 4, respectively,

,

And

to be. here

Denotes an SRS transmission band according to k, which is a value of a bandwidth parameter value (B _SRS ) of the SRS bandwidth parameter described with reference to FIGS. 7 to 10. According to one embodiment of the present specification, when the number of A-SRS transmit antennas is increased, a transmission power (transmission power) is considered to be lowered. That is, when the number of antennas is 1 (1TX), considering the high transmission power, the bandwidth is increased, and when the number of antennas is 2 (2TX) and 4 (4TX), the configuration corresponds to the configuration for reducing the transmission bandwidth. do.

FIG. 11 is a diagram in which antenna configuration information for A-SRS is used as A-SRS transmission bandwidth information according to an embodiment of the present specification.

,

, 또는

에 매칭되도록 하고 있다. 예를 들어 하나의 안테나를 사용하여 A-SRS를 송신하는 것으로 설정된 경우, A-SRS 전송 대역폭은

를 통해 확인할 수 있다. 이는, 도 7 내지 도 10에서 각각의 SRS 대역폭 설정(C_SRS) 값에 따라 매칭되는

의 값을 A-SRS 대역폭으로 하는 것을 의미한다. 예를 들어, 도 7에서 SRS 대역폭 설정(C_SRS) 값이 1인 경우, 1개의 안테나로 설정된 경우

이며, 그 결과 A-SRS의 대역폭으로 96 RB(resource block)가 된다. 한편 2개의 안테나로 설정된 경우

이며 A-SRS의 대역폭으로 32 RB가 되며, 4개의 안테나로 설정된 경우

이며 A-SRS의 대역폭으로 16 RB가 된다.In FIG. 11, a value (Total ASRS allocation BW, RB) to be used as the bandwidth of the A-SRS is determined according to the antenna configuration (ASRS antenna configuration, 1TX, 2TX, 4TX) of the A-SRS.

,

, or

To match. For example, if it is set to transmit A-SRS using one antenna, the A-SRS transmission bandwidth is

You can check it through This is matched according to each SRS bandwidth setting (C _SRS ) value in FIGS. 7 to 10.

Means the value of A-SRS. For example, when the value of the SRS bandwidth setting (C _SRS ) is 1 in FIG. 7, it is set to one antenna

As a result, the bandwidth of A-SRS is 96 RB (resource block). On the other hand, if it is set with two antennas

When the bandwidth of A-SRS is 32 RB and it is set as 4 antennas

The bandwidth of A-SRS is 16 RB.

The base station may refer to the bandwidth suitable for transmitting the A-SRS of the UE and the antenna configuration information of the UE. The user terminal may also refer to the previous process when the predetermined A-SRS triggering information is received through the physical channel. For example, bandwidth information of the A-SRS may be set using the information set in the RRC setting process).

When applying FIG. 11, the bandwidth (RB, number of resource blocks) of A-SRS may be mapped to the number of antennas as shown in Table 11 below.

[Table 1]

11 shows an A-SRS transmission band according to antenna configuration. A transmission band of the same or wider range may be set as the A-SRS allocation band. 12, 13, 7, 8, 9, and 10, as shown in Tables 2 and 3 below, an example in which the allocation bands of the A-SRSs are mapped according to each antenna configuration will be described. 12 and 13 illustrate a method of calculating the A-SRS allocation band. In the A-SRS allocation band calculated in FIGS. 12 and 13, the user terminal may select and transmit the A-SRS transmission bandwidth according to 2TX / 4TX.

이지만, 두 개의 안테나 혹은 네 개의 안테나를 사용하는 경우(2TX, 4TX)의 경우에는 1210, 1220과 같이

및

를 이용하여 산출된 할당 대역을 이용할 수 있다. 예를 들어, 도 7에서 SRS 대역폭 설정(C_SRS) 값이 1이고 안테나가 2개(2TX)인 경우,

은 32이며, N₁은 3이 되므로, 1210에 의하여 안테나가 2개인 경우 A-SRS 할당 대역폭은 32x2인 64 RB가 된다. 한편, 안테나가 4개(4TX)인 경우, 1220에 의하여

(96 RB)에서 1210의 결과인 64RB를 뺀 값인 32 RB가 된다. FIG. 12 is a first diagram of using antenna configuration information for A-SRS according to an embodiment of the present specification as allocated band information including A-SRS transmission bandwidth. In the case of using one antenna in FIG. 12, the size of the A-SRS bandwidth is 1TX.

However, in the case of using two antennas or four antennas (2TX, 4TX), like 1210 and 1220

And

It is possible to use the allocated band calculated by using. For example, when the SRS bandwidth setting (C _SRS ) value is 1 and two antennas (2TX) in FIG. 7,

Is 32, and N ₁ is 3, and according to 1210, the A-SRS allocated bandwidth is 64 RB of 32x2 when there are two antennas. On the other hand, if there are four antennas (4TX), by 1220

(96 RB) minus 64 RB, which is the result of 1210, to 32 RB.

12, the allocation bandwidth (RB, number of resource blocks) of the A-SRS may be mapped to the number of antennas as shown in Table 2 below.

TABLE 2

이지만, 두 개의 안테나 혹은 네 개의 안테나를 사용하는 경우(2TX, 4TX)의 경우에는 1310, 1320과 같이

및

를 이용하여 산출된 할당 대역을 이용할 수 있다. 예를 들어, 도 7에서 SRS 대역폭 설정(C_SRS) 값이 1이고 안테나가 4개(4TX)인 경우,

은 32이며, N₁은 3이 되므로, 1320에 의하여 안테나가 4개인 경우 A-SRS 할당 대역폭은 32x2인 64 RB가 된다. 한편, 안테나가 2개(2TX)인 경우, 1310에 의하여

(96 RB)에서 1320의 결과인 64RB를 뺀 값인 32 RB가 된다. FIG. 13 is a second diagram inherently using antenna configuration information for A-SRS according to another embodiment of the present specification as allocation band information including A-SRS transmission bandwidth. In the case of using one antenna in FIG. 13 (1TX), the size of the A-SRS bandwidth is

However, in case of using two antennas or four antennas (2TX, 4TX), like 1310, 1320

And

It is possible to use the allocated band calculated by using. For example, in FIG. 7, when the SRS bandwidth setting (C _SRS ) value is 1 and there are four antennas (4TX),

Since N is 32 and N ₁ is 3, the A-SRS allocated bandwidth is 64 RB of 32x2 when 4 antennas are assigned by 1320. On the other hand, when there are two antennas (2TX), by 1310

It is (32 RB) minus 64 RB, which is the result of 1320.

13, the allocation bandwidth (RB, number of resource blocks) of the A-SRS may be mapped to the number of antennas as shown in Table 3 below.

[Table 3]

FIG. 11 is an A-SRS bandwidth, and FIGS. 12 and 13 include mapping to the number of antennas so as to implicitly calculate an allocated bandwidth. 12 and 13 may be in a state where information is shared between a base station and a user terminal in advance. 11, 12, and 13, the bandwidth or the allocated bandwidth information among the information required to configure the A-SRS may be shared through previous higher layer signaling, or in another embodiment through the physical layer. In an embodiment of higher layer signaling, the RRC may be shared during the RRC configuration process, and the base station implicitly provides bandwidth information to the user terminal through the RRC configuration process. Hereinafter, the RRC will be described as an embodiment.

The A-SRS bandwidths of FIG. 11 and Table 1 are bandwidth information for transmitting the actual A-SRS, and the A-SRS allocation bandwidths of FIGS. 12 and 13 and Tables 2 and 3 are bandwidths allocated for transmitting the actual A-SRS. Means information. As a result, the process of determining the location information of the frequency for transmitting the A-SRS again in the A-SRS allocation bandwidth of FIGS. 12, 13 and Tables 2 and 3 may be further needed. This will be described later with reference to FIGS. 15 and 16.

Next, we will look at the intrinsic setting process of the comb information (comb) that is set during the A-SRS transmission.

14 is a diagram illustrating frequency division of each antenna configuration according to a transmissionComb-ap value according to an embodiment of the present specification.

As shown in FIG. 5, when the A-SRS is transmitted by dividing the frequency domain into Comb 0 and Comb 1, each user terminal may transmit a sounding reference signal in any one Comb. This configuration information is set to a transmissionComb-ap value, which is one of the SRS configuration parameters. However, by setting such information inherently according to the number of antennas, it may be configured so that no separate signaling is required.

For example, it is divided into two groups according to the antenna configuration transmitted from each terminal in the cell, and a different Comb value (transmissionComb-ap) is assigned to each. As shown in FIG. 14, if the antenna setting of the terminal in the cell is 1TX, 2TX, and 4TX, 1TX is designated as Group 1, 2TX, and 4TX as Group 2, and transmissionComb-ap = 0 for Group 1 and Group 2 for each group. Assign transmissionComb-ap = 1. If the 1TX, which is the antenna setting for transmitting the ASRS in the entire system band, and 2TX, 4TX, which is the antenna setting for transmitting the ASRS in some bands, are divided into transmissionComb-ap values, the terminal uses the A-SRS antenna settings to determine the transmissionComb-ap value. Can be inferred. As a result, it is possible to determine which Comb is to transmit the A-SRS.

In FIG. 14, Comb 0 (transmissionComb-ap = 0) for 1TX and Comb 1 (transmissionComb-ap = 1) for 2TX and 4TX are exemplary embodiments, and vice versa. That is, according to another embodiment of the present specification, in case of 1TX, Comb 1 (transmissionComb-ap = 1) may be set, and in case of 2TX and 4TX, Comb 0 (transmissionComb-ap = 0) may be set. In addition, the Comb value may be set by setting 1Tx and 4TX as one group and 2TX as another group. Subsequently, even when the Comb has three or more pieces of information, the process of matching the configuration information and the Comb value of the antenna of the present specification may be applied as it is. Of course, interference between 1TX and 4TX may occur according to the configuration of the system, the characteristics of the antenna, and the characteristics of the A-SRS sequence (characteristic of the Zadoff-Chu sequence), but the present specification is not limited thereto, and may vary depending on the configuration of the antenna. The comb includes matching, and includes a case where the user terminal can calculate a comb value through the antenna setting information.

Next, the process of inherently providing which frequency range the A-SRS starts and transmits will be described. The size of the bandwidth to transmit the A-SRS has been described above with reference to FIGS. 11, 12, and 13 and Tables 1, 2, and 3. This is the information calculated by applying the previous Figures 7 to 10.

Table 1 and FIG. 11 mean A-SRS bandwidth transmitted by the UE. As shown in Tables 2, 3 and 12 and 13, when the terminal acquires information on the allocated bandwidth for transmitting the A-SRS according to the antenna configuration, the terminal can transmit the A-SRS. Can be found.

,

)을 먼저 알아야 한다. 안테나 설정에 따른 시작지점에서부터 할당 대역의 크기 내에서 A-SRS 송신 가능 지점 중 하나가 주파수 시작점이 된다. 이 때 A-SRS 송신 가능 지점의 수는 전체 A-SRS 할당 대역폭을 전송 대역폭(transmission BW)으로 나눈 값이 된다.In other words, when the antenna configuration of the terminal in the cell is 1TX, 2 TX, 4 TX, the A-SRS allocation band according to the antenna configuration is as shown in FIGS. 12 and 13, and in order to obtain the frequency starting point (Frequency position) Starting point (

,

) First. One of the A-SRS transmittable points within the size of the allocated band from the start point according to the antenna configuration is the frequency start point. At this time, the number of A-SRS transmittable points is a value obtained by dividing the total A-SRS allocated bandwidth by the transmission bandwidth (transmission BW).

,

)을 구하고, 해당 시작지점을 기준으로 각각의 사용자 단말이 송신하게 되는 A-SRS 전송 대역의 시작 지점이 무엇인지를 결정하는 것이 필요하다. 우선, 주파수 위치(frequency position)의 후보의 수를 N_{freq _ position}이라 할 경우 도 12 및 표 2의 경우 각각의 안테나 수에 따른 주파수 시작 지점의 후보 수는 수학식 2와 같다.Therefore, the starting point according to the antenna setting (

,

), And it is necessary to determine the starting point of the A-SRS transmission band that each user terminal transmits based on the corresponding starting point. First, in the case where the number of candidates for the frequency position is N _{freq _ position} , the candidate number of frequency start points according to the number of antennas in FIG. 12 and Table 2 is expressed by Equation 2 below.

[Equation 2]

,

,

으로 나누어 계산한 것을 의미한다. Equation 2 is the bandwidth that can be allocated in 1TX, 2TX, 4TX in Figure 12 is A-SRS transmission bandwidth

,

,

It means calculated by dividing by.

가 된다. 따라서 시작 지점의 주파수 위치(frequency position)의 수가 1이며 '0'지점에서 A-SRS을 전송한다.In the above example, when the A-SRS antenna configuration of the terminal is 1TX, the A-SRS transmission bandwidth is

Becomes Therefore, the number of frequency positions at the start point is 1, and the A-SRS is transmitted at the '0' point.

On the other hand, if the number of candidate starting point according to the antenna configuration is 2 or more, to calculate the frequency starting point by applying a subframe identification number (subframe_ID) and the identification number (UE_ID) of the user terminal, A-SRS as shown in Equation 3 It is possible to calculate the frequency position for each UE to be transmitted. The subframe identification number may be an identification number of a subframe triggered by a base station, an identification number of a second subframe that can be calculated in such a subframe, or an identification number of a subframe promised to transmit an A-SRS or such a subframe. The identification number of the second subframe that can be calculated may be applied. On the other hand, the identification number of the user terminal is assigned a unique value (unique) to the user terminals. Accordingly, the base station can trigger the A-SRS by calculating in advance the frequency position and bandwidth information that requires the transmission of the A-SRS using the corresponding user terminal information and the subframe information related to the transmission. Of course, this may be triggered without precomputing these items before the triggering.

&Quot; (3) &quot;

That is, as shown in Equation 3, the start point of the frequency bandwidth (allocation band) that can transmit the A-SRS according to the setting of the antenna is calculated, and the user terminal using the corresponding antenna setting is the frequency within the allocated band The starting point is calculated.

A frequency domain in which A-SRS is transmitted by applying Equations 2 and 3 is shown in FIG. 15.

)이며, 4TX의 경우에는 1511(

)이다. 도 15에서 2TX의 경우 할당 대역폭 시작지점인 1521에서 전체 할당 대역폭을 부과할 경우, 1522 부분을 지나게 되며 이때, 전체 대역폭의 범위를 넘어서게 되므로 다시 0에서 시작하도록 1524 범위를 할당할 수 있다. 그리고 이는 서브프레임 식별 번호를 통하여 산출된다. 이 시작점(1511, 1521)에서 각각의 UE들이 가질 수 있는 주파수 시작지점 역시 수학식 3을 적용하여 산출할 수 있다. In FIG. 15, in the case of 2TX in the total bandwidth 1500, the A-SRS allocated bandwidth is 1522 and 1524 combined. Meanwhile, in the case of 4TX, the A-SRS allocation bandwidth is 1510. Equation 3 is used to calculate the starting point of the A-SRS allocation bandwidth in the case of 2TX in the full bandwidth 1500. The starting point according to the antenna configuration is to divide the entire band by N ₁ and calculate it from 0 to N ₁ -1. For the resulting 2TX, the starting point for the A-SRS allocated bandwidth is 1521 (

) Or 1511 (for 4TX)

)to be. In the case of 2TX in FIG. 15, when the total allocated bandwidth is imposed at 1521, which is the starting point of the allocated bandwidth, it passes through the 1522 part. At this time, the 1524 range may be allocated to start at 0 again since the total bandwidth is exceeded. This is calculated through the subframe identification number. Frequency starting points that each UE may have at these starting points 1511 and 1521 may also be calculated by applying Equation 3.

In Equation 3, starting points of 2TX and 4TX are adjusted by subframe identification numbers, and the A-SRS allocation bandwidth of 2TX and the A-SRS allocation bandwidth of 4TX do not overlap.

FIG. 16 is a diagram illustrating calculation of A-SRS frequency resources that can be calculated by a UE or a base station by applying Equations 2 and 3 when C _SRS of FIG. 12 and Table 2 according to an embodiment of the present specification are 1;

For convenience of description, it is assumed that the subframe identification number (subframe_ID) is 5 and the user terminal number (UE_ID) is 3.

이며 SRS 대역폭 설정 정보인 C_SRS가 1인 경우, 도 7의 설정 정보 및 도 12를 이용하면 표 2와 같이, 1TX인 경우 A-SRS의 할당 대역폭은 96, 2TX인 경우 A-SRS의 할당 대역폭은 64, 4TX인 경우 A-SRS의 할당 대역폭은 32가 된다. 이 경우 가능한 A-SRS의 할당 대역의 예는 도 16의 1610, 1620, 1630과 같이 산출된다. Bandwidth

When the C _SRS is 1, the SRS bandwidth setting information is 1, when using the configuration information of FIG. 7 and FIG. In the case of 64 and 4TX, the allocated bandwidth of the A-SRS is 32. In this case, examples of possible allocation bands of the A-SRS are calculated as shown in 1610, 1620, and 1630 of FIG. 16.

,

)는 모두 N₁의 구간으로 나눈 것을 의미하며, 도 16의 경우 3등분을 하였다. 96RB를 3등분 하게 되면 32RB 단위로 나뉘어지므로, 가능한 A-SRS의 할당 대역의 시작점(

,

)은 0, 1, 2로 나뉘어지게 된다.Starting point of the allocated band of possible A-SRS (

,

) Means all divided by the interval of N ₁ , in the case of FIG. If the 96RB is divided into 3 parts, it is divided into 32RB units.

,

) Is divided into 0, 1, and 2.

값이 0인 경우로 주파수 위치가 0인 부분에서 2TX의 A-SRS 할당 대역폭(1612)이 시작함을 알 수 있다. 한편, 수학식 3을 적용하면 4TX의 A-SRS 할당 대역폭(1614)의 시작점(안테나 설정에 따른 시작 지점인)인

를 산출하게 되는데 2(64RB)임을 알 수 있다. In the case of the 1610, the allocated bandwidth of the 2TX A-SRS is a starting point according to the antenna configuration.

If the value is 0, it can be seen that the A-SRS allocation bandwidth 1612 of 2TX starts at the portion where the frequency position is 0. On the other hand, applying Equation 3 is the starting point (which is the starting point according to the antenna setting) of the 4TX A-SRS allocated bandwidth (1614)

It can be seen that it is 2 (64RB).

Similarly, in 1620, the A-SRS allocated bandwidth 1622 starts at 1 (32RB) for 2TX and the A-SRS allocated bandwidth 1624 starts at 0 for 4TX. Further, in 1630, the A-SRS allocated bandwidths 1632 and 1633 start at 2 (64RB) in the case of 2TX, and the A-SRS allocated bandwidth 1634 at 1 in the case of 4TX. In the case of 1630, since the range of 2TX goes beyond the range of the entire bandwidth, the allocated bandwidth 1633 starts again at the zero position.

인 32RB만큼 A-SRS가 송신되며, 4TX의 A-SRS는 '1634' 영역 내에서

인 16RB 만큼 A-SRS가 송신된다.If the subframe identification number (subframe_ID) is 5 and the user terminal number (UE_ID) is 3, the starting point (the starting point according to the antenna setting) of the allocated bandwidth of the A-SRS of 2TX is 2 and the A-SRS of the 4TX, as in 1630. The starting point of the allocated bandwidth of (starting point according to the antenna setting) is 1. That is, 2TX A-SRS is in the '1632' area or '1633' area

A-SRS is transmitted as much as 32RB, and A-SRS of 4TX is within '1634' area.

A-SRS is transmitted as much as 16RB.

As described above, the 2TX A-SRS allocation bandwidth is 64RB, but since the A-SRS transmission bandwidth transmitted by the 2TX user terminal (identification number 3) is 32RB, the A-SRS transmission position of the corresponding user terminal is set to '1632'. Or within the '1633' area. To this end, in the case of 2TX of Equation 3, the value is 0 when the frequency starting point for each UE is calculated. Accordingly, the user terminal set to 2TX transmits an A-SRS having a size of 32RB at the position of 0.

Meanwhile, the 4TX A-SRS allocation bandwidth is 32RB, but the A-SRS transmission bandwidth transmitted by the 4TX user terminal (identification number 3) is 16RB, so the A-SRS transmission position of the corresponding user terminal is within the '1634' region. You have to find it. To this end, if the frequency location of each UE of 4TX in Equation 3 is applied, its value is calculated to 48. Accordingly, the user terminal set to 4TX transmits an A-SRS having a size of 16RB at a position of 48RB (between 32RB and 64RB).

Equation 4 below shows the calculation result when Equations 2 and 3 are applied to the situation of FIG. 16 in a situation where C _SRS of FIG. 12 and Table 2 are 1.

&Quot; (4) &quot;

In addition, when the user terminal (identification number 3) calculated by Equation 4 is 2TX in transmitting A-SRS, the starting point is 0RB, and in case of 4TX, the starting point is 48RB.

As described above, transmissionComb-ap, srs-Bandwidth-ap, and freqDomainPosition-ap of parameters for Aperiodic SRS transmission may be internally assigned by the base station according to the environment of the terminal. Of course, the implicit allocation for this environment is also possible through higher layer signaling or through the physical layer. As an embodiment of the higher layer signaling, it may be provided to a user terminal through RRC signaling. Accordingly, the base station can control the use of different resources between the terminals by dynamically allocating cyclicshift-ap to each terminal using 3-state (2-bit) to 7-state (3-bit). 17 and 18 illustrate a process of allocating a cyclicshift-ap using 2 bits or 3 bits.

도 사용자 단말에 제공될 수 있다. 사용자 단말이 가질 수 있는 사이클릭 쉬프트의 값은 도 6에서 나타난 바와 같이 총 8가지로 나뉘어질 수 있으며, 그 결과 3bit를 할당할 수 있다. 사이클릭 쉬프트(cyclic shift)

는 [수학식 5]를 통해 산출되는 값을 가지게 된다. 따라서, 기지국에서는

(3 bit)을 사용자 단말에 제공하여 사이클릭 쉬프트(cyclic shift)

를 산출할 수 있다. 17 and 18 are diagrams illustrating cyclic shift settings for A-SRS transmission according to an embodiment of the present specification. As described above, among the information required for aperiodic SRS transmission, a cyclic shift is represented.

Also may be provided to the user terminal. The cyclic shift values that the user terminal may have may be divided into eight types as shown in FIG. 6, and as a result, 3 bits may be allocated. Cyclic shift

Has a value calculated through [Equation 5]. Therefore, in the base station

Cyclic shift by providing (3 bit) to the user terminal

Can be calculated.

[Equation 5]

값 중에서 1가지를 선택할 수 있으나, 다수의 안테나를 가지는 경우에는 안테나 간의 최대 이격이 되는 것이 필요하므로,

값을 그룹화 하여 설정할 수 있다. 예를 들어, 도 16은 2개의 안테나를 가지는 경우, 하나의 사용자 단말이 가질 수 있는

은 4가지가 될 수 있다. 사용자 단말의 안테나 간에 이격이

(180도)가 되도록 할 수 있다. 도 17에서

이 가질 수 있는 경우의 수는 4가지로 그룹 1, 2, 3, 4로 나눌 수 있으며, 그룹 1은 1710, 그룹 2는 1720, 그룹 3은 1730, 그룹 4는 1740으로, 각각의 그룹에서 사용자 단말(2개의 안테나를 가지는)이 취할 수 있는

은 표 4와 같다. 표 4에서 제 1 안테나, 제 2 안테나는 2 개의 안테나에 대한 임의의 숫자이므로, 제 1, 제 2를 바꾸어 적용할 수도 있다.
However, in case of having one antenna, the user terminal

One value can be selected, but if there are multiple antennas, it is necessary to be the maximum separation between the antennas,

The values can be grouped together. For example, FIG. 16 illustrates that one user terminal may have two antennas.

Can be four. Spacing between antennas

(180 degrees). In Figure 17

The number of possible cases can be divided into 4 groups, 1, 2, 3, and 4, group 1 is 1710, group 2 is 1720, group 3 is 1730, group 4 is 1740, and users in each group. The terminal (with two antennas) can take

Is shown in Table 4. In Table 4, since the first antenna and the second antenna are arbitrary numbers for the two antennas, the first and second antennas may be interchanged.

[Table 4]

를 적용하여 수학식 2와 같이 사이클릭 쉬프트(cyclic shift)

를 산출할 수 있다.According to Table 4, if the base station designates any one of groups 1, 2, 3, and 4 and transmits the information with 2 bits, the user terminal determines whether the received group is the first antenna and the second antenna.

By applying the cyclic shift (cyclic shift) as shown in equation (2)

Can be calculated.

은 2가지가 될 수 있다. 사용자 단말의 안테나 간에 이격이

(90도) 가 되도록 할 수 있다. 도 18에서

이 가질 수 있는 경우의 수는 2가지로 그룹 1, 2로 나눌 수 있으며, 그룹 1은 1810, 그룹 2는 1820으로, 각각의 그룹에서 사용자 단말(4개의 안테나를 가지는)이 취할 수 있는

은 표 5와 같다. 표 5에서 제 1 안테나, 제 2 안테나, 제 3 안테나, 제 4 안테나는 4개의 안테나에 대한 임의의 숫자이므로, 제 1, 제 2, 제 3, 제 4를 바꾸어 적용할 수도 있다.
Similarly, in case of four antennas, one user terminal may be divided into two groups as shown in FIG.

Can be two things. Spacing between antennas

(90 degrees). In Figure 18

The number of possible cases can be divided into two groups, group 1 and 2, group 1 is 1810 and group 2 is 1820, which can be taken by a user terminal (with 4 antennas) in each group.

Is shown in Table 5. In Table 5, since the first antenna, the second antenna, the third antenna, and the fourth antenna are arbitrary numbers for four antennas, the first, second, third, and fourth antennas may be replaced.

TABLE 5

로 줄일 수 있다. 사이클릭 쉬프트 그룹 정보는 N이 2 인 경우 2bit, N이 4인 경우 1bit로 하여 기지국과 단말 간에 송수신되는 정보를 줄일 수 있다. 3 bit의 사이클릭 쉬프트 정보가 어떠한 사이클릭 쉬프트 값으로 매칭될 것인지는 기지국과 단말의 구성에서 다양하게 설정될 수 있다.
That is, in case of multiple antenna transmission, N-antennas are used for cyclic shift by grouping cyclic shifts as shown in Figs. 17, 18 and Tables 4 and 5. Bit number of information

Can be reduced to The cyclic shift group information is 2 bits when N is 2 and 1 bit when N is 4, thereby reducing information transmitted and received between the base station and the terminal. Which cyclic shift value is matched with 3 bits of cyclic shift information may be set in various configurations of the base station and the terminal.

As shown in FIGS. 17 and 18, different antennas of each terminal are divided into cyclic shift values, and when the antenna configuration of the terminal is 2TX and 4TX, the antenna is divided into four to two groups. Allocates shift resources. In addition, one information (1-state) may be used to indicate periodic SRS holding in case a collision occurs because a periodic SRS terminal and an aperiodic SRS terminal share the same resource in a cell. In this case, two states or six kinds of information (2-state / 6-state) are used as the value of the cyclicshift-ap.

In summary, the configuration of information for A-SRS transmission using a physical channel according to an embodiment of the present specification is as follows. A case in which 2 or 3 bits are available for DCI format 4 among physical channels is shown in Tables 6 and 7. Information allocation for each bit may be allocated differently during implementation.

[Table 6] A-SRS setting information for 2 bit

[Table 7] A-SRS setting information for 3 bit

The cyclic shift information of Tables 6 and 7 includes grouping information of the cyclic shifts described above with reference to FIGS. 17 and 18.

On the other hand, the configuration information including the cyclic shift and information indicating not to send the A-SRS except for the periodic SRS holding part is also possible. This is shown in Tables 8 and 9.

[Table 8] A-SRS setting information for 2 bit

[Table 9] A-SRS setting information for 3 bit

Hereinafter, a detailed configuration of a method and apparatus for transmitting and receiving an aperiodic reference signal using the implicit radio resource region information according to an embodiment of the present specification will be described. The implicit radio resource region information is the transmission of the A-SRS information such as the A-SRS transmission bandwidth or the A-SRS allocated bandwidth and the reference point (starting point) within the bandwidths calculated in FIGS. 11, 12, 13 and Tables 1, 2, and 3 above. Means environmental information, such as antenna settings (1TX, 2TX, 4TX) for, the user terminal can determine the radio resource region using the environment information. Of course, the base station may also determine in advance the non-distributed resource region information that the user terminal will determine and receive the A-SRS. In addition, comb information related to A-SRS transmission may also match environment information such as antenna settings (1TX, 2TX, 4TX) as shown in FIG. 14, and the user terminal may use A-SRS in a comb using environment information. It can be determined whether to transmit. In addition, the indication information includes cyclic shift information related to A-SRS signal generation. In this case, the cyclic shift information may include group information as described with reference to FIGS. 17 and 18.

In addition, such environment information may be shared between the base station and the user terminal through RRC signaling.

Of course, the configuration of Tables 6 and 7 can be changed in various ways. For example, instead of SRS holding, all of the cyclic shift information may be allocated to 1 to 3 or 1 to 7, and may be reconfigured to allocate other information. This was confirmed in Tables 8 and 9.

19 is a diagram illustrating a process of receiving an aperiodic reference signal using embedded radio resource region information in the apparatus for receiving a reference signal according to an embodiment of the present specification.

The reference signal receiving apparatus may be a base station or a device that provides a function of receiving a reference signal and may be combined with the base station.

The apparatus for receiving a reference signal determines a radio resource region that can be calculated based on environment information of the apparatus for transmitting a reference signal (S1910). At this time, one embodiment of the environmental information may be one embodiment of the configuration information of the antenna. That is, the radio resource region information may be calculated by using the configuration information of the antenna that is used by the RS to transmit the aperiodic reference signal, and more specifically, by using the configuration information of the antenna, It may be used to calculate any one or more of the information, the start information of the bandwidth, or the comb information.

Meanwhile, as shown in FIGS. 15 and 16, Equations 2 and 3 are used when information on an allocated bandwidth capable of transmitting the aperiodic reference signal is calculated using configuration information of the antenna as shown in FIGS. 12 and 13. As described above, a reference point of a bandwidth at which the transmitter transmits an aperiodic reference signal within the allocated bandwidth using information calculated at the time of transmission of the aperiodic reference signal and information calculated by the reference signal transmitter (for example, For example, the starting point) can be calculated. Such information can be calculated by the reference signal transmitter on the user terminal side using the environment information, and the reference signal receiver on the base station side can predict this and transmit the indication information.

In operation S1920, the indication information indicating that the aperiodic reference signal is transmitted in the radio resource region is transmitted. In a more detailed embodiment, the size of the indication information may be 2 bits or 3 bits, which is included in DCI format 4. DCI format 4 is included in a radio control signal and transmitted.

In this case, the indication information may include cyclic shift information required for the RS to generate the aperiodic reference signal. In particular, in the environment of 2TX or 4TX, the indication information may be cyclic shift group information applicable according to the number of antennas of the RS.

In operation S1930, the aperiodic reference signal is received from the RS transmission apparatus in the radio resource region.

Prior to S1910, the reference signal receiving apparatus may transmit the environment information to the reference signal transmitting apparatus through RRC. The environment information transmitted through the RRC can be continuously used without any change, and if the base station wants to change it, it can be transmitted again through the RRC.

20 is a diagram illustrating a process of transmitting an aperiodic reference signal using embedded radio resource region information in the apparatus for transmitting a reference signal according to an embodiment of the present specification.

The reference signal transmitter may be a user terminal or a device that provides a function of transmitting a reference signal and may be combined with the user terminal.

The reference signal transmitter receives instruction information instructing transmission of the aperiodic reference signal from the reference signal receiver (S2010). In a more detailed embodiment, the size of the indication information may be 2 bits or 3 bits, which is included in DCI format 4. DCI format 4 is included in the radio control signal and received. In this case, the indication information may include cyclic shift information required for the RS to generate the aperiodic reference signal. In particular, in the environment of 2TX or 4TX, the indication information may be cyclic shift group information applicable according to the number of antennas of the RS.

The radio resource region information to which the aperiodic reference signal is to be transmitted is calculated using environment information. At this time, one embodiment of the environmental information may be one embodiment of the configuration information of the antenna. That is, the radio resource region information may be calculated by using the configuration information of the antenna that the reference signal transmitter uses to transmit the aperiodic reference signal, and more specifically, the bandwidth by using the configuration information of the antenna. It may be used to calculate any one or more of the information, the start information of the bandwidth, or the comb information.

On the other hand, when the information on the allocation bandwidth capable of transmitting the aperiodic reference signal is calculated using the configuration information of the antenna as shown in Figs. 12, 13, the aperiodic as shown in Figs. Using the information calculated at the time of transmission of the reference signal and the information calculated by the reference signal transmitter, a reference point (for example, a starting point) of a bandwidth at which the transmitter transmits an aperiodic reference signal within the allocated bandwidth is calculated. can do.

Since the radio resource region information may be checked through the environment information and the reference signal may be generated using the indication information, the reference signal transmitter transmits the non-periodic reference signal to the reference signal receiver (S2030).

Prior to S2010, the RS may receive the environment information from the RS receiving apparatus through RRC. The environment information transmitted through the RRC can be continuously used without any change, and when the base station (reference signal receiver) wants to change it, it can be received again through the RRC.

21 is a diagram illustrating a configuration of an apparatus for receiving a reference signal according to an embodiment of the present specification.

The reference signal receiving apparatus may be a base station or a device that provides a function of receiving a reference signal and may be combined with the base station.

The reference signal receiving apparatus includes a control unit 2110, a coding unit 2120, and a transceiver 2130. In more detail, the controller 2110 determines a radio resource region that can be calculated based on environmental information of a reference signal transmitter, and the coding unit 2120 provides indication information indicating that an aperiodic reference signal is transmitted in the radio resource region. A radio control signal is generated, and the transceiver 2130 transmits the radio control signal to the RS transmission apparatus, and receives the aperiodic RS from the RS transmission apparatus in the radio resource region.

At this time, one embodiment of the environmental information may be one embodiment of the configuration information of the antenna. That is, the radio resource region information may be calculated by using the configuration information of the antenna that the reference signal transmitter uses to transmit the aperiodic reference signal, and more specifically, the bandwidth by using the configuration information of the antenna. It may be used to calculate any one or more of the information, the start information of the bandwidth, or the comb information.

On the other hand, when the information on the allocation bandwidth capable of transmitting the aperiodic reference signal is calculated using the configuration information of the antenna as shown in Figs. 12, 13, the aperiodic as shown in Figs. Using the information calculated at the time of transmission of the reference signal and the information calculated by the reference signal transmitter, a reference point (for example, a starting point) of a bandwidth at which the transmitter transmits an aperiodic reference signal within the allocated bandwidth is calculated. can do.

In a detailed embodiment of the indication information, the size of the indication information may be 2 bits or 3 bits, which is included in DCI format 4. DCI format 4 is included in a radio control signal and transmitted.

In this case, the indication information may include cyclic shift information required for the RS to generate the aperiodic reference signal. In particular, in the environment of 2TX or 4TX, the indication information may be cyclic shift group information applicable according to the number of antennas of the RS.

In addition, the transceiver 2130 may transmit the environment information to the reference signal transmitter through RRC. The environment information transmitted through the RRC can be continuously used without any change, and if the base station wants to change it, it can be transmitted again through the RRC.

22 is a diagram illustrating a configuration of an apparatus for transmitting a reference signal according to an embodiment of the present specification.

The reference signal transmitter may be a user terminal or a device that provides a function of transmitting a reference signal and may be combined with the user terminal.

The reference signal transmitter includes a controller 2210, a reference signal generator 2220, and a transceiver 2230. In more detail, the transceiver 2230 receives the indication information indicating the transmission of the aperiodic reference signal from the RS and transmits the aperiodic reference signal, and the controller 2210 is configured to transmit the aperiodic reference signal. The radio resource area information is calculated using the environment information. In addition, the reference signal generator 2220 generates an aperiodic reference signal using the indication information.

In this case, the transceiver 2230 transmits an aperiodic reference signal to the reference signal receiver by using the information calculated by the controller 2210.

In a more detailed embodiment of the indication information, the size of the indication information may be 2 bits or 3 bits, which is included in DCI format 4. DCI format 4 is included in the radio control signal and received. In this case, the indication information may include cyclic shift information required for the RS to generate the aperiodic reference signal. In particular, in the environment of 2TX or 4TX, the indication information may be cyclic shift group information applicable according to the number of antennas of the RS.

The radio resource region information to which the aperiodic reference signal is to be transmitted is calculated using environment information. At this time, one embodiment of the environmental information may be one embodiment of the configuration information of the antenna. That is, the radio resource region information may be calculated by using the configuration information of the antenna that the reference signal transmitter uses to transmit the aperiodic reference signal, and more specifically, the bandwidth by using the configuration information of the antenna. It may be used to calculate any one or more of the information, the start information of the bandwidth, or the comb information.

On the other hand, when the information on the allocation bandwidth capable of transmitting the aperiodic reference signal is calculated using the configuration information of the antenna as shown in Figs. 12, 13, the aperiodic as shown in Figs. Using the information calculated at the time of transmission of the reference signal and the information calculated by the reference signal transmitter, a reference point (for example, a starting point) of a bandwidth at which the transmitter transmits an aperiodic reference signal within the allocated bandwidth is calculated. can do.

The transceiver 2230 may receive the environment information from the RS receiving apparatus through RRC. The environment information transmitted through the RRC can be continuously used without any change, and when the base station (reference signal receiver) wants to change it, it can be received again through the RRC.

Although the environment information described with reference to FIGS. 19 to 22 includes antenna setting information and the like, information for periodic SRS (periodic SRS) transmission (FIGS. 2, 3, 4, 7, 8, 9 and 10) may also be included.

Among the parameters to be configured for A-SRS transmission (cyclic shift-ap, transmissionComb-ap, srs-Bandwidth-ap, freqDomainPosition-ap, srsantennaconfig-ap), some parameters are set in a small information range of 2 to 3 bits (3-state or In order to configure a configuration parameter set that can be stored in 7-state, it is necessary to efficiently combine each parameter according to the transmission environment. In this specification, an optimal A-SRS configuration set parameter set is configured by applying A-SRS transmission antenna configuration information and periodic SRS transmission parameters to enable efficient resource allocation of A-SRS through DCI format 4. To this end, some of the A-SRS parameters can be inferred according to the environment of the terminal, and the configuration of the RRC-configured ASRS parameter set using 3 or 7 pieces of information is possible by dynamically assigning other parameters.

In the above description, all elements constituting the embodiments of the present invention are described as being combined or operating in combination, but the present invention is not necessarily limited to the embodiments. In other words, within the scope of the present invention, all of the components may be selectively operated in combination with one or more. In addition, although all of the components may be implemented in one independent hardware, each or all of the components may be selectively combined to perform some or all functions combined in one or a plurality of hardware. It may be implemented as a computer program having a. Codes and code segments constituting the computer program may be easily inferred by those skilled in the art. Such a computer program may be stored in a computer readable storage medium and read and executed by a computer, thereby implementing embodiments of the present invention. The storage medium of the computer program may include a magnetic recording medium, an optical recording medium, a carrier wave medium, and the like.

In addition, the terms "comprise", "comprise" or "having" described above mean that the corresponding component may be included, unless otherwise stated, and thus excludes other components. It should be construed that it may further include other components instead. All terms, including technical and scientific terms, have the same meanings as commonly understood by one of ordinary skill in the art unless otherwise defined. Terms commonly used, such as terms defined in a dictionary, should be interpreted to coincide with the contextual meaning of the related art, and shall not be construed in an ideal or excessively formal sense unless explicitly defined in the present invention.

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 not intended to limit the technical idea of the present invention but to describe 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 (32)

Determining, by the apparatus for receiving a reference signal, a radio resource region that can be calculated based on environment information of the apparatus for transmitting a reference signal;
Transmitting indication information indicating that an aperiodic reference signal is to be transmitted in the radio resource region to the reference signal transmitter; And
Receiving the aperiodic reference signal from the apparatus for transmitting a reference signal in the radio resource region.
The method of claim 1,
The size of the indication information is 2bit or 3bit,
And transmitting the indication information comprises including the indication information in a bit allocated to DCI format 4.
The method of claim 1,
And wherein the radio resource region information is calculated using configuration information of an antenna that is used by the apparatus for transmitting the aperiodic reference signal to transmit the aperiodic reference signal.
The method of claim 3, wherein
And the configuration information of the antenna is used to calculate one or more of bandwidth information, bandwidth start information, or comb information.
The method of claim 3, wherein
When information on the allocated bandwidth for transmitting the aperiodic reference signal is calculated using the configuration information of the antenna,
Calculating a reference point of a bandwidth at which the transmitting device transmits the aperiodic reference signal within the allocated bandwidth by using the information related to the transmission time of the aperiodic reference signal and the information related to the identification of the reference signal transmitter. And a non-periodic reference signal.
The method of claim 1,
And the indication information includes cyclic shift information necessary for the reference signal transmitter to generate the aperiodic reference signal.
The method of claim 6,
And the indication information is cyclic shift group information applicable to the number of antennas of the RS.
The method of claim 1,
The apparatus for receiving a reference signal further comprises the step of transmitting the environment information to the reference signal transmitting apparatus through higher layer signaling.
Receiving, by the reference signal transmitter, indication information indicating transmission of an aperiodic reference signal from the reference signal receiver;
Calculating radio resource region information to which the aperiodic reference signal is to be transmitted using environment information; And
And transmitting the aperiodic reference signal to the reference signal receiving apparatus by using the radio resource region information and the indication information.
The method of claim 9,
The size of the indication information is 2bit or 3bit, the step of receiving the indication information
Receiving a radio control signal from the reference signal receiving apparatus; And
If the radio control signal is DCI format 4, extracting the indication information from bits allocated to the DCI format.
The method of claim 9,
The calculating of the radio resource region information may include
And calculating using the setting information of the antenna used by the apparatus for transmitting the aperiodic reference signal to transmit the aperiodic reference signal.
12. The method of claim 11,
And the configuration information of the antenna is used to calculate one or more of bandwidth information, bandwidth start information, or comb information.
12. The method of claim 11,
The calculating of the radio resource region information may include
Calculating an allocation bandwidth capable of transmitting the aperiodic reference signal using configuration information of the antenna; And
Using the information calculated at the time of transmission of the aperiodic reference signal and the information calculated from the identification information of the reference signal transmitter, the reference point of the bandwidth at which the transmitter transmits the aperiodic reference signal within the allocated bandwidth is calculated. Further comprising the step of: aperiodic reference signal transmission.
The method of claim 9,
And the indication information includes cyclic shift information necessary for the reference signal transmitter to transmit the aperiodic reference signal.
The method of claim 14,
And the indication information is cyclic shift group information applicable to the number of antennas of the RS.
The method of claim 9,
The apparatus for transmitting the aperiodic reference signal further comprises receiving the environment information from the reference signal receiving apparatus through higher layer signaling.
A control unit for determining a radio resource region that can be calculated based on environmental information of the reference signal transmitter;
A coding unit generating a radio control signal including indication information indicating that an aperiodic reference signal is to be transmitted in the radio resource region;
And a transceiver for transmitting the radio control signal to the reference signal transmitter and receiving the aperiodic reference signal from the reference signal transmitter in the radio resource region.
The method of claim 17,
The size of the indication information is 2bit or 3bit,
And the coding unit includes the indication information in a bit allocated to DCI format 4.
The method of claim 17,
And the radio resource region information is calculated using configuration information of an antenna that is used by the apparatus for transmitting a reference signal to transmit the aperiodic reference signal.
The method of claim 19,
And the configuration information of the antenna is used to calculate one or more of bandwidth information, bandwidth start information, or comb information.
The method of claim 19,
When information on the allocated bandwidth for transmitting the aperiodic reference signal is calculated using the configuration information of the antenna,
A reference point of a bandwidth at which the transmitter transmits an aperiodic reference signal within the allocated bandwidth using information calculated at the time of transmission of the aperiodic reference signal and information calculated by the reference signal transmitter; And an aperiodic reference signal.
The method of claim 17,
And the indication information includes cyclic shift information necessary for the reference signal transmitter to transmit the aperiodic reference signal.
The method of claim 22,
And the indication information is cyclic shift group information applicable to the number of antennas of the RS.
The method of claim 19,
And the transceiver is configured to receive the aperiodic reference signal for transmitting the environment information to the reference signal transmitter through higher layer signaling.
A transceiver for receiving instruction information indicating transmission of an aperiodic reference signal from a reference signal receiving apparatus and transmitting an aperiodic reference signal;
A control unit for calculating radio resource region information to which the aperiodic reference signal is to be transmitted using environmental information; And
A reference signal generator configured to generate an aperiodic reference signal using the indication information,
And the transmitting and receiving unit transmits an aperiodic reference signal to the reference signal receiving apparatus using the information calculated by the controller.
The method of claim 25,
The size of the indication information is 2bit or 3bit,
And when the transceiver receives a radio control signal including DCI format 4 from the RS, the controller extracts the indication information allocated to the DCI format.
The method of claim 25,
And the control unit calculates the radio resource region information by using the setting information of the antenna that the reference signal transmitter uses to transmit the aperiodic reference signal.
The method of claim 27,
And the configuration information of the antenna is used to calculate one or more of bandwidth information, bandwidth start information, or comb information.
The method of claim 27,
The controller calculates an allocated bandwidth capable of transmitting the aperiodic reference signal by using the setting information of the antenna, and uses information calculated at the time of transmission of the aperiodic reference signal and information calculated by the reference signal transmitter. And calculating a reference point of a bandwidth at which the transmitting device transmits an aperiodic reference signal within the allocated bandwidth.
The method of claim 25,
And the indication information includes cyclic shift information necessary for the reference signal transmitter to transmit the aperiodic reference signal.
The method of claim 30,
And the indication information is cyclic shift group information applicable according to the number of antennas of the reference signal transmitter.
The method of claim 25,
And the transmitter / receiver is configured to receive the environment information from the reference signal receiver through higher layer signaling.

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