KR20150109619A - Apparatus and method for transmitting control information in device to device communication - Google Patents

Abstract

Disclosed are an apparatus and a method for transmitting control information in device to device communications. A method for transmitting the uplink DM (demodulation)-RS (reference signal) sequence of a first terminal may include a step of allowing the first terminal to determine control information to be transmitted to a second terminal, a step of allowing the first terminal to generate an uplink DM-RS sequence and map it to a transmission resource based on the control information, and a step of allowing the first terminal to transmit the uplink DM-RS sequence to the second terminal through the transmission resource. The uplink DM-RS sequence can be generated by considering a generation variable determined depending on the control information.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and an apparatus for transmitting control information in D2D communication,

The present invention relates to wireless communication, and more particularly, to a method and apparatus for transmitting control information in D2D (device to device) communication.

The amount of data transmitted through wireless communication is increasing. However, since the frequency resources that can be provided by service providers are limited and already saturated, mobile communication carriers are constantly developing technologies for finding new frequencies and improving the efficiency of frequency use. D2D (Device-to-Device) communication technology is one of the technologies currently being actively studied as a way to mitigate such shortage of frequency resources and to create new mobile communication services.

D2D communication refers to a technique in which terminals close to each other in geographical proximity directly exchange information without going through an infrastructure such as a base station. D2D communication technology has been developed and standardized mainly in the license-exempt band such as Wi-Fi Direct and Bluetooth, which have already been commercialized. However, in recent years, technology development and standardization for supporting D2D communication in a cellular system using a license band are underway. As a typical example, the 3rd Generation Partnership Project (3GPP), a mobile communication standardization organization, actively works on standardization of D2D communication technology called ProSe (Proximity-based Services) as one of the new technologies included in LTE (Long Term Evolution)

SUMMARY OF THE INVENTION The present invention provides a method for transmitting control information by a terminal in D2D communication.

Another object of the present invention is to provide a device for transmitting control information in a D2D communication.

의 값 및 직교 시퀀스 중 적어도 하나를 포함할 수 있다.According to an aspect of the present invention, there is provided a method of transmitting an uplink DM (demodulation) -RS (reference signal) sequence of a first terminal, the method comprising: The method includes the steps of: generating an uplink DM-RS sequence based on the control information and mapping the uplink DM-RS sequence to a transmission resource; and transmitting, by the first terminal, -RS sequence, wherein the uplink DM-RS sequence is generated in consideration of a generation variable determined based on the control information,

And an orthogonal sequence.

의 값 및 직교 시퀀스 중 적어도 하나를 포함할 수 있다.According to another aspect of the present invention, there is provided a terminal for transmitting an uplink DM (demodulation) -RS (reference signal) sequence, And a processor selectively connected to the RF unit, wherein the processor determines the control information to be transmitted to the second terminal by the first terminal, and transmits the uplink DM RS sequence to the second terminal through the transmission resource, and the uplink DM-RS sequence transmits the uplink DM-RS sequence to the second terminal through the transmission resource based on the control information , And the generation variable is generated by considering

And an orthogonal sequence.

In the D2D communication, a UE can transmit control information (or scheduling assignment information) to another UE implicitly through an uplink reference signal without using a separate control channel. By using this method, the terminal can send control information to other terminals or receive it from other terminals with a computational burden.

1 is a block diagram illustrating a wireless communication system.
2 and 3 schematically show the structure of a radio frame to which the present invention is applied.
4 is a conceptual diagram illustrating transmission of an uplink DM-RS.
5 is a conceptual diagram showing that one basic reference signal sequence is generated as a plurality of reference sequences according to a cyclic shift.
6 shows an uplink DM-RS generated using an orthogonal cover code.
7 is a conceptual diagram illustrating D2D (device-to-device) communication.
8 is a conceptual diagram illustrating a method for transmitting control information in D2D communication according to an embodiment of the present invention.
9 is a conceptual diagram illustrating a method of transmitting control information in D2D communication according to an embodiment of the present invention.
10 is a conceptual diagram illustrating a method of transmitting control information in D2D communication according to an embodiment of the present invention.
11 is a conceptual diagram illustrating a method of assigning different uplink DM-RS sequences to different resources according to an embodiment of the present invention.
12 is a conceptual diagram illustrating a method for transmitting control information in D2D communication according to an embodiment of the present invention.
13 is a conceptual diagram illustrating a method of assigning different uplink DM-RS sequences to different resources according to an embodiment of the present invention.
14 is a conceptual diagram illustrating a method of transmitting control information in D2D communication according to an embodiment of the present invention.
15 is a conceptual diagram illustrating a method of assigning different uplink DM-RS sequences to different resources according to an embodiment of the present invention.
16 is a block diagram illustrating a wireless communication system according to an embodiment of the present invention.

Hereinafter, some embodiments will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the embodiments 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 disclosure rather unclear.

The present invention will be described with reference to a communication network. The work performed in the communication network may be performed in a process of controlling the network and transmitting data by a system (e.g., a base station) that manages the communication network, The work can be done.

1 is a block diagram illustrating a wireless communication system.

Referring to FIG. 1, a wireless communication system 10 may provide a communication service between a base station and a terminal. In a wireless communication system, a terminal and a base station can transmit and receive data wirelessly. The wireless communication system may support D2D (device to device) communication between the terminal and the terminal. A wireless communication system supporting D2D communication will be described later.

A base station (BS) 11 of a wireless communication system 10 can provide a communication service through a specific frequency band to a terminal existing within the transmission coverage of the base station. The coverage served by the base station may also be expressed in terms of a site. A site may include a plurality of areas 15a, 15b, 15c, which may be referred to as sectors. Each of the sectors included in the site can be identified based on different identifiers. Each of the sectors 15a, 15b, and 15c can be interpreted as a partial area covered by the base station 11.

The base station 11 generally refers to a station that communicates with the terminal 12 and includes an evolved-NodeB (eNodeB), a base transceiver system (BTS), an access point, a femto base station (Femto eNodeB) (ENodeB), a relay, a remote radio head (RRH), and the like.

A user equipment (UE) 12 may be fixed or mobile and may be a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, (personal digital assistant), a wireless modem, a handheld device, and the like.

Depending on the size of the coverage provided by the base station, it may be referred to by various terms such as megacell, macrocell, microcell, picocell, femtocell, and the like. The cell may be used in terms of the frequency band provided by the base station, the coverage of the base station, or the term indicating the base station.

Hereinafter, a downlink refers to a communication or communication path from the base station 11 to the terminal 12, and an uplink refers to a communication or communication path from the terminal 12 to the base station 11 do. In the downlink, the transmitter may be part of the base station 11, and the receiver may be part of the terminal 12. In the uplink, the transmitter may be part of the terminal 12, and the receiver may be part of the base station 11. There is no limit to the multiple access scheme applied to the wireless communication system 10. [ (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier-FDMA , OFDM-CDMA, and the like. These modulation techniques increase the capacity of the communication system by demodulating signals received from multiple users of the communication system. The uplink transmission and the downlink transmission may be performed using a time division duplex (TDD) scheme transmitted at different times or a frequency division duplex (FDD) scheme using different frequencies.

The layers of the radio interface protocol between the terminal and the base station are divided into a first layer (L1), a second layer (L1), and a second layer (L2) based on the lower three layers of an Open System Interconnection A second layer (L2), and a third layer (L3). Among them, the physical layer belonging to the first layer provides an information transfer service using a physical channel.

In the physical layer, a plurality of physical channels can be defined and data can be transmitted through a physical channel. The physical downlink control channel (PDCCH) includes a resource allocation and transmission format of a downlink shared channel (DL-SCH), a resource of an uplink shared channel (UL-SCH) And may include allocation information. The PDCCH includes a random access response transmitted on a physical downlink shared channel (PDSCH), a transmission power control (TPC) command for individual terminals in an arbitrary terminal group, and the like. Lt; / RTI > A plurality of PDCCHs can be defined in a control region for a specific terminal. The UE can acquire control information by monitoring a plurality of PDCCHs.

Control information of the physical layer mapped to the PDCCH is referred to as downlink control information (DCI). That is, the DCI is transmitted on the PDCCH. DCI includes uplink resource grant information or downlink resource assignment information, uplink transmission power control information, control information for paging, control information for indicating a random access response (RA response), etc. . ≪ / RTI >

2 and 3 schematically show the structure of a radio frame to which the present invention is applied.

Referring to FIGS. 2 and 3, a radio frame includes 10 subframes. One subframe includes two slots. The time (length) for transmitting one subframe is called a transmission time interval (TTI). Referring to FIG. 2, for example, the length of one subframe (1 subframe) may be 1 ms and the length of one slot may be 0.5 ms.

One slot may contain a plurality of symbols in the time domain. For example, in the case of a radio system using an OFDMA (Orthogonal Frequency Division Multiple Access) in a downlink (DL), the symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol, In the case of a radio system using Single Carrier-Frequency Division Multiple Access (FDMA), the symbol may be a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol. On the other hand, the representation of the symbol period of the time domain is not limited by the multiple access scheme or the name.

The number of symbols included in one slot may vary according to the length of a CP (Cyclic Prefix). For example, in the case of a normal CP, one slot includes seven symbols, and in the case of an extended CP, one slot may include six symbols.

A resource block (RB) is a resource allocation unit, and may be a time-frequency resource corresponding to 180 kHz on the frequency axis and 1 slot on the time axis. A resource element (RE) is a smallest time-frequency resource to which a modulation symbol of a data channel or a modulation symbol of a control channel is mapped, and is a symbol corresponding to one symbol in the time domain and one subcarrier in the frequency domain.

In a wireless communication system, it is necessary to estimate the state of an uplink channel or a downlink channel for data transmission / reception, system synchronization acquisition, channel information feedback, and the like. The terminal and / or the base station can perform channel estimation for recovering a transmission signal by compensating for distortion of a signal caused by a sudden change in the channel environment.

The terminal and the base station can use a reference signal (RS) for channel estimation between the terminal and the base station.

)를 추정할 수 있다.In the case of downlink channel estimation, the UE knows the information of the reference signal received from the Node B. Accordingly, the UE estimates a channel based on the reference signal received from the Node B and compensates the channel value, thereby accurately obtaining downlink data transmitted from the Node B. Let p be the reference signal transmitted by the base station, h be the channel information experienced by the reference signal during transmission, n be the thermal noise generated by the terminal, and y be the signal received by the terminal. Y = h p + n have. Since the reference signal p is already known by the UE, if the LS (Least Square) scheme is used, the channel information

) Can be estimated.

&Quot; (1) "

는

값에 의존하게 되므로, 정확한 h값의 추정을 위해서는

을 0에 수렴시킬 필요가 있다.Here, the channel estimation value estimated using the reference signal p

The

Value, so for accurate estimation of the h value

To converge to zero.

In the case of the uplink channel estimation, the downlink channel estimation can be performed in the same manner as the downlink channel estimation, except that the transmitting entity of the reference signal is the terminal and the receiving entity is the base station.

The reference signal can generally be generated based on the reference signal sequence. The reference signal sequence may be one or more of several sequences having superior correlation characteristics. For example, a Constant Amplitude Zero Auto-Correlation (CAZAC) sequence such as a Zadoff-Chu (ZC) sequence or a PN (pseudo-noise) sequence such as an m-sequence, a Gold sequence or a Kasami sequence May be used as the reference signal sequence, and various other sequences having superior correlation characteristics may be used depending on system conditions. Also, the reference signal sequence may be used by cyclic extension or truncation in order to adjust the length of the sequence, or may be formed in various forms such as binary phase shift keying (BPSK) or quadrature phase shift keying (QPSK) And may be modulated and mapped to a resource element.

(RS), a cell-specific RS (CRS) reference signal, a UE-specific RS, a position RS, and a channel state information A channel state information (CSI) reference signal (CSI-RS) or the like may be used as a reference signal in the downlink.

The UE-specific reference signal is a reference signal received by a specific UE or a specific UE group in the cell. The UE-specific reference signal may be referred to as a demodulation RS (DM-RS) because it is mainly used for demodulating downlink data for a specific UE or a specific UE group.

Similar to the downlink, the UE can transmit the uplink reference signal to the Node B on the uplink. The uplink reference signal may include uplink DM-RS and SRS. The uplink DM-RS may be used for coherent demodulation of the base station for uplink physical channels (PUSCH) and physical uplink control channel (PUCCH). Therefore, the uplink DM-RS may be allocated to the frequency bandwidth to which the PUSCH or PUCCH is allocated.

The uplink SRS can be used for channel estimation for channel dependent scheduling and link adaptation according to the uplink channel. When there is sufficient reciprocity between the uplink and downlink, that is, when the uplink and downlink channels have sufficiently similar characteristics, the uplink SRS can be used to estimate the downlink channel condition.

Hereinafter, in the embodiment of the present invention, the uplink DM-RS is additionally posted.

The uplink DM-RS may be used for channel estimation for coherent demodulation of the PUSCH to which the UL-SCH transport channel is mapped. Also, the uplink DM-RS may be used for coherent demodulation of the PUCCH that carries various types of L1 / L2 control signaling. Although there are some differences, the basic uplink DM-RS structure can be the same for PUSCH and PUCCH. The difference is that the number and position of the SC-FDMA symbols transmitting the uplink DM-RS in one uplink subframe may be different from each other.

4 is a conceptual diagram illustrating transmission of an uplink DM-RS.

4 shows transmission of an uplink DM-RS for demodulating PUSCH data.

Referring to FIG. 4, certain symbols may be used solely to transmit the uplink DM-RS. The uplink DM-RS may be time multiplexed with other uplink transmissions from the same terminal. More specifically, the uplink DM-RS for demodulating the PUSCH data can be transmitted in the uplink slot through the fourth SC-FDMA symbol after the fourth SC-FDMA symbol (which is calculated inversely in time from the latest SC-FDMA symbol in time) have. Specifically, in an uplink sub-frame using a normal CP, an uplink DM-RS transmits a fourth SC-FDMA symbol (l = 3) in time in each uplink slot included in the uplink sub-frame Lt; / RTI >

In the uplink subframe using the extended CP, the uplink DM-RS can be transmitted through the third SC-FDMA symbol (l = 2) in time in each of the uplink slots included in the uplink subframe have.

Therefore, the uplink DM-RS is transmitted through one SC-FDMA symbol in each of two slots included in one subframe. That is, the UE can perform the uplink DM-RS through the two SC-FDMA symbols in the uplink subframe.

The number of SC-FDMA symbols transmitting the uplink DM-RS for demodulating the PUCCH data and the location of the SC-FDMA symbol may vary according to the PUCCH format. The basic structure of each reference signal transmission may be a reference signal in a frequency domain mapped to a continuous input (continuous subcarrier) of the signal generator regardless of whether the uplink channel is a PUCCH or a PUSCH.

The number of subcarriers to which the uplink DM-RS corresponding to the uplink DM-RS sequence length is mapped may be the same as the number of subcarriers to which the PUSCH / PUCCH is allocated. Specifically, when the transmission bandwidth allocated to the PUSCH changes in the uplink data transmission through the PUSCH, the length of the uplink DM-RS sequence for demodulating the uplink data transmitted through the PUSCH may vary. Since the uplink resource allocation for PUSCH transmission is always performed in units of resource blocks having 12 subcarriers, the length of the reference signal sequence may be always a multiple of 12.

Hereinafter, a method for generating a reference signal sequence of an uplink DM-RS (demodulation reference signal for PUSCH) for the PUSCH will be specifically described. That is, in the embodiment of the present invention, the uplink DM-RS that is posted may indicate the uplink DM-RS with respect to the PUSCH.

로서 레이어

에 따라 아래의 수학식 2와 같이 정의될 수 있다. The uplink DM-RS sequence for PUSCH is

As a layer

Can be defined as shown in Equation (2) below.

&Quot; (2) "

는 참조 신호 시퀀스를 위해 할당된 서브캐리어의 개수로 참조 신호 시퀀스의 길이를 나타낸다.

로 정의될 수 있고,

는 하나의 자원 블록에 포함되는 서브캐리어의 개수이다. m은 PUSCH 및 이와 연계되는 상향링크 DM-RS를 위해 할당된 자원 블록의 개수로

의 범위의 값으로 정의될 수 있다 (단, 수학식 2에서의 m은 직교 시퀀스(orthgonal sequence)의 인덱스로써 0 또는 1의 값을 가지며, 상기 할당된 자원 블록의 개수에 해당하는 m과는 다른 파라메터다). 전술한 바와 같이 참조 신호 시퀀스의 길이는 하나의 자원 블록에 포함되는 서브캐리어의 개수의 배수로 정의될 수 있다.

로써 참조 신호 시퀀스의 길이에 해당하는 참조 신호 시퀀스를 위해 할당된 서브캐리어의 개수와 PUSCH에 할당된 서브캐리어의 개수가 동일함을 알 수 있다.Referring to Equation 2,

Denotes the length of the reference signal sequence as the number of subcarriers allocated for the reference signal sequence.

, ≪ / RTI >

Is the number of subcarriers included in one resource block. m is the number of resource blocks allocated for the PUSCH and the uplink DM-RS associated therewith

M in Equation (2) is an index of an orthogonal sequence and has a value of 0 or 1, and is different from m corresponding to the number of allocated resource blocks Parameter c). As described above, the length of the reference signal sequence can be defined as a multiple of the number of subcarriers included in one resource block.

It can be seen that the number of subcarriers allocated for the reference signal sequence corresponding to the length of the reference signal sequence is equal to the number of subcarriers allocated to the PUSCH.

는

로 정의될 수 있다. ≪ RTI ID = 0.0 >

The

. ≪ / RTI >

는 순환 쉬프트(cyclic shift)

및 기본 시퀀스

에 의해 정의될 수 있다. 아래의 수학식 3은

을 나타낸다.

Is a cyclic shift,

And basic sequence

Lt; / RTI > The following equation (3)

.

&Quot; (3) "

는 참조 신호 시퀀스의 길이이다. 순환 쉬프트

에 따라 하나의 기본 시퀀스

가 복수의 참조 신호 시퀀스로 정의될 수 있다. As described above

Is the length of the reference signal sequence. Cyclic shift

According to one basic sequence

May be defined as a plurality of reference signal sequences.

는 자드오프-추(Zadoff-Chu) 시퀀스에 의해 정의될 수 있다. 이러한 기본 시퀀스의 정의에 대해서는 2013년 12월에 게시된 ‘3GPP TS36.211 V11.5.0, 3rd Generation Partnership Project Technical Specification Group Radio Access Network Evolved Universal Terrestrial Radio Access (E-UTRA) Physical Channels and Modulation(Release 11)’(이하, 3GPP TS36.211)의 5.5.1 절에 게시되어 있다.
Basic sequence

Can be defined by the Zadoff-Chu sequence. The definition of this basic sequence is described in 3GPP TS36.211 V11.5.0, 3rd Generation Partnership Project Technical Specification Group Radio Access Network Evolved Universal Terrestrial Radio Access (E-UTRA) Physical Channels and Modulation (Release 11 ) (Hereinafter referred to as 3GPP TS36.211).

5 is a conceptual diagram showing that one basic reference signal sequence is generated as a plurality of reference sequences according to a cyclic shift.

가 0부터 11까지 변화하는 경우, 순환 쉬프트

의 값이

와 같은 값을 같게 되면 하나의 기본 시퀀스를 기반으로 순환 쉬프트의 변화에 따라 서로 직교하는 참조 신호 시퀀스를 생성할 수 있다. 즉, 하나의 기본 시퀀스로부터 최대 12개까지의 직교 참조 신호를 정의할 수 있다.The uplink DM-RSs defined from different reference signal sequences generally have a non-zero cross-correlation, albeit relatively low. On the other hand, the reference signals defined by different phase rotations of the same basic reference signal sequence are orthogonal to each other and do not interfere with each other. E.g

Changes from 0 to 11, the cyclic shift

The value of

It is possible to generate a reference signal sequence orthogonal to each other according to the change of the cyclic shift based on one basic sequence. That is, up to twelve orthogonal reference signals can be defined from one basic sequence.

는 직교 커버 코드(OCC, orthogonal cover code)와 같은 직교 시퀀스(orthogonal sequence)를 나타낸다. 직교 시퀀스는 상향링크 다중 안테나 전송, 구체적으로는 공간 다중화를 포함한 다중 안테나 프리코딩 방식에서 사용될 수 있다. 공간 다중화를 수행하는 경우 레이어(layer) 당 별도의 상향링크 DM-RS가 필요하다. 예를 들어, 4개의 공간적으로 다중화되는 레이어를 동시에 전송하는 것을 지원해야 하는 경우, 하나의 단말은 4개의 서로 다른 상향링크 DM-RS를 전송할 수 있어야 한다. 이러한 서로 다른 상향링크 DM-RS를 생성하기 위해서는 전술한 바와 같이 서로 다른 순환 시퀀스를 사용하여 복수개의 상호 직교하는 참조 신호를 생성하거나 또는 서브프레임 내의 2개의 참조 신호 전송에 대하여 직교 커버 코드(orthogonal cover code)와 같은 상호 직교 패턴을 적용함으로써 2개의 서로 다른 참조 신호를 생성할 수 있다.
Referring again to Equation (2)

Represents an orthogonal sequence such as an orthogonal cover code (OCC). The orthogonal sequence can be used in a multiple antenna precoding scheme including uplink multiple antenna transmission, specifically spatial multiplexing. When spatial multiplexing is performed, a separate uplink DM-RS is required per layer. For example, if it is necessary to support simultaneous transmission of four spatially multiplexed layers, one terminal must be able to transmit four different uplink DM-RSs. In order to generate such different uplink DM-RSs, a plurality of mutually orthogonal reference signals are generated using different cyclic sequences as described above, or an orthogonal cover code is generated for two reference signal transmissions in a subframe code to generate two different reference signals.

6 shows an uplink DM-RS generated using an orthogonal cover code.

6 is the uplink DM-RS generated when the orthogonal cover code is [+1, +1] and the lower end of FIG. 6 is the uplink DM generated when the orthogonal cover code is [+1, -1] -RS. The plurality of orthogonal reference signals generated in this manner may be used, for example, in performing a multiple input multiple output (MIMO) -multiple input multiple output (MIMO).

는 DCI(downlink control information) 포맷(format)이 0에 대해,

로 정의될 수 있다.If the upper layer parameter Activate-DMRS-with-OCC is not set or the temporary uplink-related DCI for the transport block associated with the corresponding PUSCH transmission is transmitted, When a temporary cell radio network identifier (RNTI) is used, the orthogonal sequence < RTI ID = 0.0 >

For the downlink control information (DCI) format 0,

. ≪ / RTI >

는 상응하는(corresponding) PUSCH 전송과 관련된 전송 블록에 대한 가장 최근의 상향링크 관련 DCI의 순환 쉬프트 필드를 사용하여 아래의 표 1에 의해 주어질 수 있다. Otherwise, the orthogonal sequence

May be given by Table 1 below using the cyclic shift field of the most recent uplink-related DCI for the transport block associated with the corresponding PUSCH transmission.

<Table 1>

를 결정하기 위한 순환 쉬프트(cyclic shift)

는 슬롯

에서

로 정의될 수 있고

는 아래의 수학식 4와 같이 정의될 수 있다.In Equation 2,

(Cyclic shift)

Slot

in

Can be defined as

Can be defined as Equation (4) below.

&Quot; (4) &quot;

는 아래의 표 2와 같이 순환 쉬프트의 값에 따라 결정될 수 있다. In Equation 4,

Can be determined according to the value of the cyclic shift as shown in Table 2 below.

<Table 2>

는 전술한 표 1에서와 같이 상향링크 관련 DCI 포맷에서 순환 쉬프트 필드에 의해 결정될 수 있다.

Can be determined by the cyclic shift field in the uplink-related DCI format as shown in Table 1 above.

는 아래의 수학식 5에 의해 결정될 수 있다.

Can be determined by the following equation (5).

Equation (5)

In Equation (5), a pseudo-random sequence c (i) is defined by a Gold sequence of length 31 as follows.

&Quot; (6) &quot;

을 기반으로 초기화될 수 있다. 만약, 상위 계층에서

에 대한 값이 설정되지 않는 경우, 또는 랜덤 액세스 승인(grant) 또는 경쟁 기반의 랜덤 액세스 절차의 일부로써 동일한 전송 블록의 재전송이 PUSCH 전송과 관련된 경우

는

로 초기화될 수 있다.

는 셀의 PCI(physical cell identifier)이다. 그 외의 경우에는

로 초기화될 수 있다.The first m-sequence is initialized to x ₁ (0) = 1, x ₁ (n) = 0, n = 1, 2, ..., The second m-sequence is transmitted at the beginning of each radio frame

Lt; / RTI &gt; If the upper layer

Or a retransmission of the same transport block as part of a random access grant or a contention based random access procedure is associated with a PUSCH transmission

The

Lt; / RTI &gt;

Is the physical cell identifier (PCI) of the cell. Otherwise

Lt; / RTI &gt;

Hereinafter, the uplink-related DCI format is posted.

DCI format 0 or DCI format 4 may be used for scheduling for the PUSCH. DCI format 4 was added in release 10 to support uplink spatial multiplexing. The basis of the uplink resource allocation scheme is a single cluster scheme in which resource blocks are all continuous in the frequency domain. However, in Release 10, up to two clusters per component carrier (or element carrier) A multi-cluster scheme has been added.

DCI format 0 may be used for scheduling for an uplink channel when spatial multiplexing is not used on a component carrier. DCI format 0 may have the same size as DCI format 1A for compact downlink allocation. A flag on the message may be used to indicate information about whether it is an uplink scheduling grant (DCI Format 0) or a downlink scheduling assignment (DCI Format 1A).

The information included in DCI format 0 and DCI format 4 is' 3GPP TS36.212 V11.4.0, 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA); 5.3.3.1.1 FORMAT 0, 5.3.3.1.8 FORMAT 4 of Multiplexing and channel coding (Release 11) '(hereinafter 3GPP TS36.212). Briefly, the information contained in each of DCI format 0 and DCI format 4 is as follows.

The DCI format 0 includes a carrier indicator, a DCI format differentiation flag, a frequency hopping flag, a resource block allocation and hopping resource a TPC command for scheduled PUSCH, a cyclic shift and an orthogonal code information (cyclic shift for DM-RS and OCC), a modulation and coding scheme and redundancy version (MCS / RV) a UL index, a downlink assignment index, a CSI request, an SRS request, a resource allocation type, and the like, .

DCI format 4 can be used in the case of uplink transmission using spatial multiplexing on one component carrier.

DCI format 4 includes a carrier indicator, a resource block assignment, a PUSCH power for information (TPC command for PUSCH), cyclic shift and orthogonal code information (cyclic shift for DM-RS and OCC index) A UL index, a downlink assignment index, a CSI request, an SRS request, a resource allocation type, a transport block, Modulation and coding scheme and redundancy version (MCS / RV) information and new data indicator (NDI) information for each of the transport blocks 1 and / or 2.

Also, the DCI format 4 may include precoding information, and the precoding information may include information on the number of transmitted precoding matrix indicators (TPMI) and layers.

Table 3 below shows the number of bits allocated to the precoding information according to the number of antenna ports of the UE.

<Table 3>

The information included in the precoding information may be defined differently depending on the number of the antenna ports of the UE, and the number of the precoding matrix indicator and the layer transmitted.

Table 4 below shows the number of precoding matrix indicators and layers included in the precoding information when there are two antenna ports.

<Table 4>

Table 5 below shows the number of precoding matrix indicators and layers included in the precoding information when there are four antenna ports.

<Table 5>

Referring to Table 4 and Table 5, the precoding matrix indicator and the number of layers can be determined according to the value of the bits mapped to the precoding information.

7 is a conceptual diagram illustrating D2D (device-to-device) communication.

D2D communication may mean a technique of directly transmitting and receiving data between terminals. For example, in D2D communication, terminals in close proximity to each other can directly transmit and receive data without going through a network infrastructure such as a base station.

In a cellular system, the load of a base station can be dispersed when terminals at close distances perform D2D communication. In addition, when terminals perform D2D communication, the terminal transmits data at a relatively short distance, so that the transmission power consumption and latency of the terminal can be reduced. In addition, since the existing cellular-based communication and D2D communication use the same resources, the frequency utilization efficiency can be improved.

Referring to FIG. 7, a data transmission and reception operation can be performed based on a cellular interface between the base station and the terminal and a D2D interface between the terminal and the terminal.

As one embodiment of performing D2D communication, the base station 700 can transmit D2D resource information to the first D2D terminal 720. [ The first D2D terminal 720 may be a terminal located within the coverage of the base station 700. The D2D resource information may include information on a transmission resource and a reception resource for D2D communication. The base station 700 may broadcast D2D resource information.

The first D2D terminal 720 receiving the D2D resource information can transmit D2D resource information to the second D2D terminal 740. [ The second D2D terminal 740 may be a terminal located outside the coverage of the base station 700. The first D2D terminal 720 and the second D2D terminal 740 may perform D2D communication based on the D2D resource information. Hereinafter, it is assumed that the terminal to be published in the embodiment of the present invention supports D2D communication.

In D2D communication, a terminal can transmit control information to another terminal. A separate channel (for example, PUCCH) for transmitting control information in the D2D communication may not be defined. If the control channel is not defined in the D2D communication, the terminal can use various methods to transmit the control information for D2D communication. In D2D communication, control information may also be expressed in terms of scheduling assignment information.

In the D2D communication, the UE transmits a control information based on a piggyback based method, a medium access control (MAC) based control information transmission method, and an uplink DM-RS based control information transmission method in order to transmit control information Can be used.

When using a piggyback-based control information transmission method, the UE can transmit control information to another UE through a data channel, similar to a method used for transmitting uplink control information (UCI) in an existing UE have.

The MAC layer-based control information transmission method can transmit control information in the MAC layer.

When the terminal uses the piggyback-based control information transmission method, the terminal must decode the control information transmitted through the preset data channel. When a terminal uses a control information transmission method based on a MAC level, the terminal must decode a data channel in order to obtain control information.

On the other hand, when the control information transmission method based on the uplink DM-RS is used, the UE can transmit control information in an implicit manner. The control information transmission method based on the DM-RS can have a computational burden less than the other control information transmission methods. When the control information transmission method based on the uplink DM-RS is used, the UE can derive the control information transmitted from the other UE based on the received uplink DM-RS sequence.

If the number of bits for transmitting the control information used in the D2D communication is not large, the process for deriving the control information transmitted from the other terminal based on the information on the uplink DM-RS sequence can be performed quickly.

Hereinafter, a method and an apparatus for transmitting and receiving control information between terminals using a control information (or scheduling assignment information) transmission method based on an uplink DM-RS in D2D communication will be described.

In the LTE system (or the LTE-A system), when the UE performs cellular-based communication, some of the control information transmitted through the DCI format 0 or the DCI format 4 can be used in the D2D communication. The control information used in the D2D communication posted below is an example of the control information that can be used in the D2D communication.

The new data indicator (NDI) information may be control information of the D2D communication. The NDI information may include information for indicating whether the data transmitted by the present terminal is previously transmitted data or new data. The NDI information may have a size of 1 bit.

The modulation and coding scheme (MCS) / redundancy version (RV) information may be control information of the D2D communication. The MCS information includes information on the MCS level used by the UE to transmit data, and the RV information can specify a different starting point in the circular buffer for reading the encoded bits. Specifically, the entire bit stream of the packet encoded in HARQ in the incremental redundancy (IR) mode can be divided into a plurality of bit stream blocks and transmitted in bit stream block units. The transmitted bit stream block may be indicated based on the RV information.

In an LTE system (or an LTE-A system), MCS / RV information transmitted through a DCI format 0 or DCI format 4 when the UE performs cellular based communication is encoded and transmitted together with the MCS information and the RV information, .

In the MCS / RV information used in the D2D communication, the MCS information and the RV information may be separately indicated. For example, the MCS information may be transmitted as separate control information through the UL DM-RS, pre-configured, pre-defined, or the like, It can be implicitly indicated. At this time, the RV information corresponding to the size of 2 bits can be transmitted as separate control information through the UL DM-RS.

On the other hand, the MCS / RV information used in the D2D communication may be transmitted together with the MCS information and the RV information, as in the case of DCI format 0 or DCI format 4 in the LTE system (or the LTE-A system). At this time, the size of the bit may be smaller than 5 bits.

The transmission terminal identifier (Tx UE identity) may be the control information of the D2D communication. The transmission terminal identifier may be implicitly transmitted as part of the data or may be transmitted with 9-bit separate control information.

The MCS / RV and the transmission terminal identifier of the above control information may be pre-configured, pre-defined, or implicitly indicated without being transmitted as separate control information by the UE. .

Control signals (or scheduling assignments) that may be used for D2D communication in embodiments of the present invention may be summarized as shown in the following table.

<Table 6>

The various cases of transmitting the control information published in Table 6 on the basis of the uplink DM-RS can be summarized as shown in Table 7 below.

<Table 7>

In the embodiment of the present invention, each case for transmitting control information based on the uplink DM-RS published in Table 7 is posted.

8 is a conceptual diagram illustrating a method for transmitting control information in D2D communication according to an embodiment of the present invention.

In FIG. 8, the first terminal 810 posts a method of transmitting NDI information based on the uplink DM-RS to the second terminal 820. The NDI information may have a size of 1 bit.

및 직교 시퀀스(

) 중 적어도 하나의 값을 결정할 수 있다. NDI 정보에 따라 상향링크 DM-RS 시퀀스를 생성하기 위해 사용하는

및 직교 시퀀스 중 적어도 하나의 값은 미리 결정된 값이거나 미리 설정된 값일 수 있다.The first terminal 810 may determine the uplink DM-RS sequence according to the NDI information to be transmitted to the second terminal 810. Specifically, the first terminal 810 may generate an uplink DM-RS sequence according to the NDI information

And orthogonal sequences (

). &Lt; / RTI &gt; To generate an uplink DM-RS sequence according to the NDI information

And at least one of the orthogonal sequences may be a predetermined value or a predetermined value.

및 직교 시퀀스 중 적어도 하나의 값을 기반으로 내재적으로 제1 단말(810)로부터 NDI 정보를 수신할 수 있다. 이하, 본 발명의 실시예에서는 NDI 정보에 따라 상향링크 DM-RS 시퀀스를 결정하는 구체적인 방법에 대해 게시한다.The second terminal 820 is used to generate an uplink DM-RS sequence received from the first terminal 810

And the orthogonal sequence based on the value of at least one of the first and second terminals 810 and 810. Hereinafter, a concrete method for determining the uplink DM-RS sequence according to the NDI information will be described in the embodiment of the present invention.

를 기반으로 NDI 정보를 지시할 수 있다. 이하, 본 발명의 실시예에서는 D2D 통신에서 단말 간 통신을 위해 단일 전송 안테나 방법을 사용하는 경우를 가정할 수 있고, 단일 전송 안테나인 경우

일 수 있다. The first method of signaling the NDI information through the uplink DM-RS sequence is to use the uplink DM-RS sequence

To indicate NDI information. Hereinafter, it is assumed that a single transmission antenna method is used for inter-terminal communication in the D2D communication in the embodiment of the present invention. In case of a single transmission antenna

Lt; / RTI &gt;

값 중 하나의 값이 NDI 정보가 0인 경우와 매핑되고, 나머지 하나의 값이 NDI 정보가 1인 경우와 매핑될 수 있다. 표 8은 NDI 정보를 지시하기 위해 사용되는

를 나타낸다.Two

Value is mapped to the case where the NDI information is 0, and the other value can be mapped to the case where the NDI information is 1. Table 8 lists the NDI information used to indicate NDI information.

.

<Table 8>

값 중 하나의 값이 0이고, 나머지 하나의 값이 6인 경우를 가정한다. 하지만, 표 8에 게시된 두 개의

값뿐만 아니라 다른 다양한 값이 NDI 정보를 지시하기 위해 사용될 수 있다. 구체적으로 DM-RS 시퀀스의

가 0인 경우, NDI 정보는 0으로 지시될 수 있고, DM-RS 시퀀스의

이 6인 경우, NDI 정보는 1로 지시될 수 있다. NDI 정보를 지시하기 위해 사용되는 두 개의

값의 차이가 크도록 설정하여 DM-RS 시퀀스 간의 직교성을 상대적으로 높일 수 있다.Table 8 lists the two used to indicate NDI information.

Assume that one of the values is 0 and the other value is 6. However, the two

Values as well as various other values may be used to indicate NDI information. Specifically, the DM-RS sequence

Is 0, the NDI information can be indicated as 0, and the DM-RS sequence &lt; RTI ID = 0.0 &gt;

If this is 6, the NDI information can be indicated as 1. The two used to indicate the NDI information

It is possible to relatively increase the orthogonality between the DM-RS sequences.

In the first method of signaling NDI information through the uplink DM-RS sequence, the orthogonal sequence may not be used to indicate NDI information.

A second method for signaling NDI information through an uplink DM-RS sequence may indicate NDI information based on an orthogonal sequence of an uplink DM-RS sequence.

One of the two orthogonal sequences may be mapped to the case where the NDI information is 0, and the other one may be mapped to the case where the NDI information is 1. Table 9 shows orthogonal sequences used to indicate NDI information.

<Table 9>

가 NDI 정보를 지시하기 위해 사용되지 않을 수 있다.In Table 9, one of the values of two orthogonal sequences used to indicate NDI information is [1, 1] and the other is [1. -1]. Other orthogonal sequences as well as the orthogonal sequences published in Table 9 may be used to indicate NDI information. Specifically, when the orthogonal sequence of the uplink DM-RS sequence is [1, 1], the NDI information is indicated as 0, and the orthogonal sequence of the uplink DM-RS sequence is [1. -1], the NDI information can be indicated as 1. [ In the second method of signaling NDI information through the uplink DM-RS sequence

May not be used to indicate NDI information.

및 직교 시퀀스를 기반으로 NDI 정보를 지시할 수 있다.The third method of signaling NDI information through the uplink DM-RS sequence is to use the uplink DM-RS sequence

And the NDI information based on the orthogonal sequence.

의 조합 중 하나의 조합이 NDI가 0인 경우와 매핑되고, 나머지 하나의 조합이 NDI가 1인 경우와 매핑될 수 있다. 표 10은 NDI 정보를 지시하기 위해 사용되는 직교 시퀀스와

의 조합을 나타낸다. An orthogonal sequence for generating an uplink DM-RS sequence and

May be mapped to the case where the NDI is 0, and the other combination may be mapped to the case where the NDI is 1. Table 10 shows the orthogonal sequences used to indicate NDI information and

.

<Table 10>

와 직교 시퀀스의 조합이 (0, [1, 1])이고 나머지 하나의 조합이

와 직교 시퀀스의 조합이 (6, [1, -1])인 경우에 대해 게시한다. 표 10에서 게시된

와 직교 시퀀스의 조합뿐만 아니라 다른 다양한

와 직교 시퀀스의 조합이 NDI 정보를 지시하기 위해 사용될 수 있다.
In Table 10, the one used to indicate the NDI information

And the orthogonal sequence are (0, [1, 1]) and the other combination is

And the orthogonal sequence is (6, [1, -1]). Published in Table 10

And orthogonal sequences as well as other various

And an orthogonal sequence may be used to indicate NDI information.

9 is a conceptual diagram illustrating a method of transmitting control information in D2D communication according to an embodiment of the present invention.

In FIG. 9, the first terminal 910 posts a method of transmitting NDI information and MCS / RV information based on the uplink DM-RS sequence to the second terminal 920. The NDI information and the MCS / RV information may have a size of 3 bits. Specifically, the uplink DM-RS sequence may implicitly include NDI information corresponding to one bit and RV information corresponding to two bits of MCS / RV information of five bits in total. Hereinafter, the MCS / RV information used in FIG. 9 may include only RV information. Specifically, only the RV information corresponding to 2 bits out of the MCS / RV information corresponding to 5 bits in total can be signaled. Among the MCS / RV information, the MCS information may be pre-defined (e.g., quadrature phase shift keying (QPSK)) or may be used for high layer signaling such as radio resource control (RRC) Or may use an implicitly indicated value by various means. &Lt; RTI ID = 0.0 &gt;

의 값 및 직교 시퀀스를 결정할 수 있다. NDI 정보 및 MCS/RV 정보를 지시하는 상향링크 DM-RS 시퀀스를 생성하기 위해 사용하는

및 직교 시퀀스 중 적어도 하나의 값은 미리 결정된 값이거나 미리 설정된 값일 수 있다.The first terminal 910 may determine the uplink DM-RS sequence according to the NDI information and the MCS / RV information to be transmitted to the second terminal 920. Specifically, the first terminal 910 generates an uplink DM-RS sequence according to the NDI information and the MCS / RV information

And the orthogonal sequence can be determined. To generate an uplink DM-RS sequence indicating NDI information and MCS / RV information

And at least one of the orthogonal sequences may be a predetermined value or a predetermined value.

및 직교 시퀀스 중 적어도 하나의 값을 기반으로 내재적으로 제1 단말(910)로부터 NDI 정보 및 MCS/RV 정보를 수신할 수 있다. 이하, 본 발명의 실시예에서는 NDI 정보 및 MCS/RV 정보에 따라 상향링크 DM-RS 시퀀스를 결정하는 구체적인 방법에 대해 게시한다.The second terminal 920 is used to generate the uplink DM-RS sequence received from the first terminal 910

And MCS / RV information from the first terminal 910 implicitly based on the value of at least one of the orthogonal sequence and the orthogonal sequence. Hereinafter, a concrete method of determining the uplink DM-RS sequence according to the NDI information and the MCS / RV information will be described in the embodiment of the present invention.

를 기반으로 NDI 정보 및 MCS/RV 정보를 지시할 수 있다. The first method of signaling the NDI information and the MCS / RV information through the uplink DM-RS sequence is the uplink DM-RS sequence

The NDI information and the MCS / RV information can be indicated.

를 나타낸다.Table 11 shows the NDI information and MCS / RV information

.

<Table 11>

값을 기반으로 NDI 정보 및 MCS/RV 정보의 조합을 지시할 수 있다. 예를 들어, DM-RS 시퀀스의

가 0인 경우, NDI 정보는 0, RV 정보는 0으로 지시될 수 있다. NDI 정보 및 RV 정보의 조합을 지시하기 위해 사용되는 8가지의

값들은 최대 간격을 가지는 쌍들(

값의 차이가 최대(6)이 되는 쌍들)로써 4개의

집합으로 분류될 수 있다. 구체적으로 하나의

집합에 포함되는 제1

값과 제2

값은 (0, 6), (3, 9), (4, 10), (2, 8) 중 하나일 수 있다.Referring to Table 11,

Value based on the combination of NDI information and MCS / RV information. For example, in the DM-RS sequence

Is 0, the NDI information may be indicated as 0, and the RV information may be indicated as 0. 8 &lt; RTI ID = 0.0 &gt; terms &lt; / RTI &gt; used to direct the combination of NDI information and RV information

Values are the pairs with the largest spacing (

Pairs in which the difference between the values is the maximum (6)).

Can be classified as a set. Specifically, one

The first

Value and the second

The value may be one of (0, 6), (3, 9), (4, 10), (2, 8)

집합에 포함되는 제1

값과 제2

값은 서로 다른 NDI 정보를 지시할 수 있다. 각각의

집합은 서로 다른 RV 정보를 지시할 수 있다.Single

The first

Value and the second

The value may indicate different NDI information. Each

The set can indicate different RV information.

및 직교 시퀀스를 기반으로 NDI 정보 및 MCS/RV 정보를 지시할 수 있다.The second method of signaling the NDI information and the MCS / RV information through the uplink DM-RS sequence is the uplink DM-RS sequence

And the NDI information and the MCS / RV information based on the orthogonal sequence.

및 직교 시퀀스를 나타낸다.Table 12 lists the NDI information and the MCS / RV information

And an orthogonal sequence.

<Table 12>

값 및 직교 시퀀스를 기반으로 NDI 정보 및 RV 정보의 조합을 지시할 수 있다. 예를 들어, 상향링크 DM-RS 시퀀스의

가 0이고 직교 시퀀스가 [1, 1]인 경우, NDI 정보는 0, RV 정보는 0으로 지시될 수 있다. Referring to Table 12

Value and an orthogonal sequence based on the combination of NDI information and RV information. For example, the uplink DM-RS sequence

Is 0 and the orthogonal sequence is [1, 1], the NDI information may be indicated as 0 and the RV information may be indicated as 0.

정보 각각이 서로 다른 RV 정보를 지시하도록 할 수 있다. 상향링크 DM-RS 시퀀스의 직교 시퀀스가 [1, 1]인 경우, NDI 정보는 0으로 지시되고, 상향링크 DM-RS 시퀀스의 직교 시퀀스가 [1, -1]인 경우, NDI 정보가 1로 지시될 수 있다.In Table 12, two different orthogonal sequences are used to indicate different NDI information, and in the case of the same orthogonal sequence,

Each of the pieces of information can be used to indicate different RV information. When the orthogonal sequence of the uplink DM-RS sequence is [1, 1], the NDI information is indicated as 0. When the orthogonal sequence of the uplink DM-RS sequence is [1, -1] Can be instructed.

값과 직교 시퀀스의 조합은 다양한 방법으로 결정될 수 있다.In addition, there are eight types of information used to direct the combination of NDI information and RV information

The combination of the value and the orthogonal sequence can be determined in various ways.

Table 12 can be expressed in two tables as shown in Tables 13 and 14 below.

값으로 각각 서로 다른 RV 정보 하나씩을 지시하는 표이다.Table 13 shows one NDI information different from each other in two different orthogonal sequences, and Table 14 shows four different NDI information

Value is a table indicating one RV information different from each other.

<Table 13>

<Table 14>

10 is a conceptual diagram illustrating a method of transmitting control information in D2D communication according to an embodiment of the present invention.

In FIG. 10, the first terminal 1010 posts a method of transmitting NDI information and transmission terminal identifier information (Tx UE ID) to the second terminal 1020 based on the uplink DM-RS sequence. The NDI information and the transmission terminal identifier information may have a size of 10 bits. Specifically, the uplink DM-RS sequence may implicitly include NDI information corresponding to one bit and transmission terminal identifier information corresponding to nine bits.

, 직교 시퀀스 및 생성된 상향링크 DM-RS 시퀀스가 할당되는 자원 영역을 결정할 수 있다. 제1 단말(1010)은 결정된

및 직교 시퀀스를 기반으로 상향링크 DM-RS 시퀀스를 생성하고, 생성된 DM-RS 시퀀스를 결정된 자원 영역에 할당할 수 있다.The first terminal 1010 may determine a resource region to which the uplink DM-RS sequence and the uplink DM-RS are allocated according to the NDI information and the transmission terminal identifier information to be transmitted to the second terminal 1020. Specifically, the first terminal 1010 generates an uplink DM-RS sequence according to the NDI information and the transmission terminal identifier information

, An orthogonal sequence, and a resource region to which the generated uplink DM-RS sequence is allocated. The first terminal (1010)

And the uplink DM-RS sequence based on the orthogonal sequence, and allocate the generated DM-RS sequence to the determined resource area.

및 직교 시퀀스 중 적어도 하나의 값 및 생성된 DM-RS 시퀀스가 할당되는 자원 영역은 미리 결정된 값이거나 미리 설정된 값일 수 있다.And generates the uplink DM-RS sequence according to the NDI information and the transmission terminal identifier information.

And the orthogonal sequence and the resource area to which the generated DM-RS sequence is allocated may be a predetermined value or a preset value.

및 직교 시퀀스 중 적어도 하나의 값 및 DM-RS 시퀀스가 할당되는 자원 영역을 기반으로 제1 단말(1010)로부터 NDI 정보 및 전송 단말 식별자 정보를 내재적으로 수신할 수 있다. 본 발명의 실시예에 따르면, 서로 다른 주파수 자원 또는 서로 다른 시간 자원으로 정의되는 복수의 자원 영역에 서로 다른 상향링크 DM-RS 시퀀스가 할당될 수 있다. 서로 다른 자원 영역에 할당된 서로 다른 상향링크 DM-RS 시퀀스를 기반으로 NDI 정보 및 전송 단말 식별자 정보를 송신 및 수신할 수 있다.
The second terminal 1020 is used to generate an uplink DM-RS sequence received from the first terminal 1010

And the orthogonal sequence, and the resource area to which the DM-RS sequence is allocated, from the first terminal 1010. The DRX- According to an embodiment of the present invention, different uplink DM-RS sequences may be allocated to a plurality of resource regions defined by different frequency resources or different time resources. It is possible to transmit and receive NDI information and transmission terminal identifier information based on different uplink DM-RS sequences assigned to different resource regions.

11 is a conceptual diagram illustrating a method of assigning different uplink DM-RS sequences to different resource regions according to an embodiment of the present invention.

Referring to FIG. 11, different uplink DM-RS sequences may be allocated to different frequency resources and / or different time resources in order to transmit NDI information and transmission terminal identifier information. The UE transmits a first uplink DM-RS sequence to a first resource region 1150 (a first frequency resource 1110, a first time resource 1130), a second resource region 1160 (a second frequency resource 1120 (First frequency resource 1110, second time resource 1140) to the second uplink DM-RS sequence, the third resource region 1170 (the first frequency resource 1110, the second time resource 1140) RS sequence to a fourth uplink DM-RS sequence to a fourth resource region 1180 (a second frequency resource 1120, a second time resource 1140). The first frequency resource 1110 and the second frequency resource 1120 may be divided into RB units and the first time resource 1130 and the second time resource 1140 may be divided into slots.

, 제1 슬롯에서 제2 상향링크 DM-RS 시퀀스를 할당받는 제2 주파수 자원(1120)에 포함되는 RB 개수는

일 수 있다. 예를 들어, N=2일 경우 제1 주파수 자원(1110)은 1개의 RB, 제2 주파수 자원(1120)은 1개의 RB를 포함할 수 있다. 마찬가지 방식으로 N=3일 경우, 제1 주파수 자원(1110)은 2개의 RB, 제2 주파수 자원(1120)은 1개의 RB를 포함하고, N=4일 경우, 제1 주파수 자원(1110)은 2개의 RB 제2 주파수 자원(1120)은 2개의 RB를 포함할 수 있다. 이러한 RB 그룹 분할 방법은 하나의 예로써 다른 다양한 방법에 의해 서로 다른 DM-RS 시퀀스를 전송하기 위한 RB 그룹을 분할 수 있다.In order to map different uplink DM-RS sequences on the frequency resource, the number of RBs used on the frequency axis may be two or more. The RB for allocating different uplink DM-RS sequences can be divided into two groups (a first frequency resource 1110 and a second frequency resource 1120). For example, when the number of allocated RBs is N, the number of RBs included in the first frequency resource 1110 allocated in the first uplink DM-RS sequence in the first slot is

, The number of RBs included in the second frequency resource 1120 allocated to the second uplink DM-RS sequence in the first slot is

Lt; / RTI &gt; For example, when N = 2, the first frequency resource 1110 may include one RB, and the second frequency resource 1120 may include one RB. Similarly, if N = 3, then the first frequency resource 1110 includes two RBs, the second frequency resource 1120 includes one RB, and if N = 4, the first frequency resource 1110 includes Two RB second frequency resources 1120 may include two RBs. As an example, the RB group division method may divide an RB group for transmitting different DM-RS sequences by various other methods.

That is, in the embodiment of the present invention, two frequency resources (first frequency resource 1110 and second frequency resource 1120) in the frequency domain and two slots (first slot The first resource area 1150, the second resource area 1160, the third resource area 1170 and the fourth resource area 1180, which are divided into a first resource area 1150, a second resource area 1160, -RS sequence can be allocated to transmit NDI information and transmission terminal identifier information. One of the four resource regions can transmit NDI information, and the remaining three resource regions can be used to transmit the transmission terminal identifier information.

For example, a frequency resource having a lower RB index among the two frequency resources (the first frequency resource 1110 and the second frequency resource 1120) and the first resource region 1150 indicated by the time resource corresponding to the first slot ) May indicate the NDI information.

를 나타낸다. Table 15 below shows the first uplink DM-RS sequence transmitted through the first resource region 1150 used for indicating NDI information

.

<Table 15>

값을 기반으로 NDI 정보를 지시할 수 있다. 예를 들어, 제1 자원 영역(1150)을 통해 전송되는 제1 상향링크 DM-RS 시퀀스의

가 0 인 경우, NDI 정보는 0으로 지시되고, 제1 자원 영역(1150)을 통해 전송되는 제1 상향링크 DM-RS 시퀀스의

가 6 인 경우, NDI 정보는 1로 지시될 수 있다. 제1 자원 영역(1150)을 통해 전송되는 제1 상향링크 DM-RS 시퀀스의 직교 시퀀스는 NDI 정보를 지시하기 위해 사용되지 않을 수 있다.Referring to Table 15

The NDI information can be indicated based on the value. For example, the first uplink DM-RS sequence transmitted through the first resource region 1150

Is 0, the NDI information is indicated as 0, and the first uplink DM-RS sequence transmitted through the first resource region 1150

Is 6, the NDI information can be indicated as 1. [ The orthogonal sequence of the first uplink DM-RS sequence transmitted through the first resource region 1150 may not be used to indicate NDI information.

(The second resource region 1160, the third resource region 1170, and the fourth resource region 1180) excluding one of the four resource regions (for example, the first resource region 1150) The second uplink DM-RS sequence, the third uplink DM-RS sequence, and the fourth uplink DM-RS sequence, which are transmitted through the uplink DM-RS sequence, may be used to transmit the transmission terminal identifier information. The transmission terminal identifier information may have a size of 9 bits.

Each of the plurality of uplink DM-RS sequences transmitted through each of the plurality of resource areas can transmit 3-bit transmission terminal identifier information. The 9-bit transmission terminal identifier information may include 3 bits of information transmitted through each of the three resource regions.

를 나타낸다. Table 16 below shows the uplink DM-RS sequence transmitted through each of the second resource region 1160 to the fourth resource region 1180 used for indicating the transmission terminal identifier information

.

<Table 16>

정보를 전송 단말 식별자 정보의 일부 비트(3비트)를 지시할 수 있다. 예를 들어, 제2 자원 영역(1160)을 통해 전송되는 제2 상향링크 DM-RS 시퀀스의

가 0인 경우, 전송 단말 식별자 정보의 일부 비트는 ‘000’으로 지시될 수 있다. 마찬가지 방식으로 제3 자원 영역(1170)을 통해 전송되는 제3 상향링크 DM-RS 시퀀스의

가 6인 경우, 전송 단말 식별자 정보의 일부 비트는 ‘001’, 제4 자원 영역(1180)을 통해 전송되는 제4 상향링크 DM-RS 시퀀스의

가 3인 경우, 전송 단말 식별자 정보의 일부 비트는 ‘010’으로 지시될 수 있다. 이러한 경우, 제2 자원 영역(1160) 내지 제4 자원 영역(1180)을 통해 지시되는 전송 단말 식별자 정보는 ‘000001010’의 9비트 정보일 수 있다.
Referring to Table 16, the DM-RS sequence transmitted through one of the three resource regions

(3 bits) of the transmission terminal identifier information. For example, the second uplink DM-RS sequence transmitted through the second resource region 1160

Is 0, some bits of the transmission terminal identifier information may be indicated as '000'. Similarly, in the third uplink DM-RS sequence transmitted through the third resource region 1170

Is 6, some bits of the transmission terminal identifier information are '001', and the fourth uplink DM-RS sequence transmitted through the fourth resource region 1180

Is 3, some bits of the transmission terminal identifier information may be indicated as '010'. In this case, the transmission terminal identifier information indicated through the second to fourth resource regions 1160 to 1180 may be 9-bit information of '000001010'.

12 is a conceptual diagram illustrating a method for transmitting control information in D2D communication according to an embodiment of the present invention.

In FIG. 12, the first terminal 1210 posts a method of transmitting NDI information, MCS / RV information, and transmission terminal identifier information to the second terminal 1220 based on the uplink DM-RS sequence. The NDI information, the MCS / RV information, and the transmission terminal identifier information may have a size of 12 bits. Specifically, the DM-RS sequence can transmit NDI information corresponding to 1 bit, RV information corresponding to 2 bits of MCS / RV information corresponding to 5 bits, and transmission terminal identifier information corresponding to 9 bits. Among the MCS / RV information, the MCS information may be generated by using a predefined value (for example, QPSK), using a pre-configured value by high layer signaling such as RRC, Implicitly indicated values can be used.

및 직교 시퀀스와 생성된 상향링크 DM-RS 시퀀스가 할당되는 자원 영역을 결정할 수 있다. 제1 단말(1210)은 결정된

및 직교 시퀀스를 기반으로 상향링크 DM-RS 시퀀스를 생성하고, 생성된 상향링크 DM-RS 시퀀스를 결정된 자원 영역에 할당할 수 있다.The first terminal 1210 can determine a resource region to which the uplink DM-RS sequence and the uplink DM-RS sequence are allocated according to the NDI information, MCS / RV information and transmission terminal identifier information to be transmitted to the second terminal 1220 have. Specifically, the first terminal 1210 is configured to generate an uplink DM-RS sequence according to NDI information, MCS / RV information, and transmission terminal identifier information

And a resource region to which the orthogonal sequence and the generated uplink DM-RS sequence are allocated. The first terminal 1210 may determine

And the uplink DM-RS sequence based on the orthogonal sequence, and allocate the generated uplink DM-RS sequence to the determined resource area.

및 직교 시퀀스 중 적어도 하나의 값 및 생성된 DM-RS 시퀀스가 할당되는 자원 영역은 미리 결정된 값이거나 미리 설정된 값일 수 있다.The uplink DM-RS used for generating the uplink DM-RS sequence according to the NDI information, the MCS / RV information and the transmission terminal identifier information

And the orthogonal sequence and the resource area to which the generated DM-RS sequence is allocated may be a predetermined value or a preset value.

및 직교 시퀀스 중 적어도 하나의 값 및 상향링크 DM-RS 시퀀스가 할당되는 자원 영역을 기반으로 제1 단말로부터 NDI 정보, MCS/RV 정보 및 전송 단말 식별자 정보를 내재적으로 수신할 수 있다. 본 발명의 실시예에 따르면, 서로 다른 주파수 자원 또는 서로 다른 시간 자원으로 정의되는 복수의 자원 영역에 서로 다른 상향링크 DM-RS 시퀀스가 할당될 수 있다. 서로 다른 자원 영역에 할당된 서로 다른 상향링크 DM-RS 시퀀스를 기반으로 NDI 정보, MCS/RV 정보 및 전송 단말 식별자 정보를 송신 및 수신할 수 있다.
The second terminal 1220 is used to generate an uplink DM-RS sequence received from the first terminal 1210

And MCS / RV information and transmission terminal identifier information from the first terminal based on at least one of the values of the uplink DM-RS sequence and the orthogonal sequence and the resource area to which the uplink DM-RS sequence is allocated. According to an embodiment of the present invention, different uplink DM-RS sequences may be allocated to a plurality of resource regions defined by different frequency resources or different time resources. And can transmit and receive NDI information, MCS / RV information, and transmission terminal identifier information based on different uplink DM-RS sequences assigned to different resource regions.

13 is a conceptual diagram illustrating a method of assigning different uplink DM-RS sequences to different resources according to an embodiment of the present invention.

Referring to FIG. 13, different uplink DM-RS sequences may be allocated to different frequency resources and / or different time resources in order to transmit NDI information, MCS / RV information, and transmission terminal identifier information. The UE transmits a first uplink DM-RS sequence to a first resource region 1350 (a first frequency resource 1310, a first time resource 1330), a second resource region 1360 (a second frequency resource 1320 ) To the second uplink DM-RS sequence, the third resource region 1360 (the first frequency resource 1310, the second time resource 1340) to the second uplink DM-RS sequence, RS sequence to the fourth uplink DM-RS sequence to the fourth resource region 1380 (the second frequency resource 1320, the second time resource 1340). The first frequency resource 1310 and the second frequency resource 1320 may be divided into RB units and the first time resource 1330 and the second time resource 1340 may be divided into slots.

, 제1 슬롯에서 제2 상향링크 DM-RS 시퀀스를 할당받는 제2 주파수 자원(1320)에 포함되는 RB 개수는

일 수 있다. 예를 들어, N=2일 경우 제1 주파수 자원(1310)은 1개의 RB, 제2 주파수 자원(1320)은 1개의 RB를 포함할 수 있다. 마찬가지 방식으로 N=3일 경우, 제1 주파수 자원(1310)은 2개의 RB, 제2 주파수 자원(1320)은 1개의 RB를 포함하고, N=4일 경우, 제1 주파수 자원(1310)은 2개의 RB 제2 주파수 자원(1320)은 2개의 RB를 포함할 수 있다. 이러한 RB 그룹 분할 방법은 하나의 예로써 다른 다양한 방법에 의해 서로 다른 상향링크 DM-RS 시퀀스를 전송하기 위한 RB 그룹을 분할 수 있다.In order to map different DM-RS sequences on the frequency resource, the number of RBs on the frequency axis may be two or more. The RB for allocating different uplink DM-RS sequences may be divided into two groups (a first frequency resource 1310 and a second frequency resource 1320). For example, when the number of allocated RBs is N, the number of RBs contained in the first frequency resource 1310 allocated in the first uplink DM-RS sequence in the first slot is

, The number of RBs included in the second frequency resource 1320 allocated to the second uplink DM-RS sequence in the first slot is

Lt; / RTI &gt; For example, when N = 2, the first frequency resource 1310 may include one RB, and the second frequency resource 1320 may include one RB. Similarly, when N = 3, the first frequency resource 1310 includes two RBs, the second frequency resource 1320 includes one RB, and if N = 4, Two RB second frequency resources 1320 may include two RBs. As an example, the RB group division method may divide an RB group for transmitting different uplink DM-RS sequences by various other methods.

That is, in the embodiment of the present invention, two frequency resources (first frequency resource 1310 and second frequency resource 1320) in the frequency domain and two slots (first time resource 1310 and second frequency resource 1320) included in one subframe in the time domain (A first resource area 1350, a second resource area 1360, a third resource area 1370, and a fourth resource area 1370) divided into a first resource area 1330 and a second time resource 1340 1380) may be assigned different uplink DM-RS sequences to transmit NDI information, RV information, and transmission terminal identifier information. One of the four resource regions can transmit NDI information and RV information, and the remaining three resource regions can be used to transmit the transmission terminal identifier information.

For example, a frequency resource having a lower RB index among the two frequency resources (the first frequency resource 1310 and the second frequency resource 1320) and the first frequency resource 1320 indicated by the first time resource 1330 corresponding to the first slot The first uplink DM-RS sequence transmitted through one resource region 1350 may indicate NDI information and RV information.

를 나타낸다. Table 17 below shows the first uplink DM-RS sequence transmitted through the first resource region 1350 used for indicating NDI information and RV information

.

<Table 17>

의 값을 기반으로 NDI 정보를 지시할 수 있다. 예를 들어, 제1 자원 영역(1350)을 통해 전송되는 제1 상향링크 DM-RS 시퀀스의

가 0 인 경우, NDI 정보는 0, RV 정보는 0으로 지시될 수 있다. 또 다른 예로, 제1 자원 영역(1350)을 통해 전송되는 제1 상향링크 DM-RS 시퀀스의

가 6 인 경우, NDI 정보는 1, RV 정보는 0으로 지시될 수 있다. 제1 자원 영역(1350)을 통해 전송되는 제1 상향링크 DM-RS 시퀀스의 직교 시퀀스는 NDI 정보 및 RV 정보를 지시하기 위해 사용되지 않을 수 있다.Referring to Table 17

The NDI information can be indicated based on the value of &lt; RTI ID = 0.0 &gt; For example, the first uplink DM-RS sequence transmitted through the first resource region 1350

Is 0, the NDI information may be indicated as 0, and the RV information may be indicated as 0. In another example, the first uplink DM-RS sequence transmitted through the first resource region 1350

Is 6, the NDI information may be indicated by 1 and the RV information may be indicated by 0. The orthogonal sequence of the first uplink DM-RS sequence transmitted through the first resource region 1350 may not be used to indicate NDI information and RV information.

값들은 최대 간격을 가지는 쌍들(

값의 차이가 최대(6)이 되는 쌍들)을 포함하는 4개의

집합으로 분류될 수 있다. 구체적으로 하나의

집합에 포함되는 제1

값과 제2

값은 (0, 6), (3, 9), (4, 10), (2, 8)일 수 있다.Table 17 lists the eight types of information used to indicate NDI information and RV information.

Values are the pairs with the largest spacing (

Pairs in which the difference in the value is the maximum (6))

Can be classified as a set. Specifically, one

The first

Value and the second

The values may be (0, 6), (3, 9), (4, 10), (2, 8)

집합에 포함되는 제1

값과 제2

값은 서로 다른 NDI 정보를 지시할 수 있다. 또한, 각각의

집합은 서로 다른 RV 정보를 지시할 수 있다.Single

The first

Value and the second

The value may indicate different NDI information. In addition,

The set can indicate different RV information.

11, the remaining resource regions (the second resource region 1360, the third resource region 1370, and the fourth resource region 1360) excluding one of the four resource regions (for example, the first resource region 1350) The first uplink DM-RS sequence, the second uplink DM-RS sequence, and the third uplink DM-RS sequence transmitted through the uplink DM-RS resource field 1380 may be used to transmit the transmission terminal identifier information. The transmission terminal identifier information may have a size of 9 bits.

를 통해 전송 단말 식별자 정보를 지시할 수 있다.
Each of the uplink DM-RS sequences transmitted through each of the resource regions can transmit 3-bit transmission terminal identifier information. The 9-bit transmission terminal identifier information may include 3 bits of information transmitted through each of the three resource regions. The uplink DM-RS sequence transmitted through each of the second to third resource regions 1360 to 1380 based on the table defined as shown in Table 16

Lt; RTI ID = 0.0 &gt; ID &lt; / RTI &gt;

14 is a conceptual diagram illustrating a method of transmitting control information in D2D communication according to an embodiment of the present invention.

In FIG. 14, the first terminal 1410 posts a method of transmitting NDI information and MCS / RV information based on the uplink DM-RS sequence to the second terminal 1420. The NDI information and the MCS / RV information transmitted through the uplink DM-RS sequence may have a size of 4 bits.

Specifically, the uplink DM-RS sequence can transmit MSC / RV information corresponding to 3 bits out of the NDI information corresponding to one bit and MCS / RV information corresponding to 5 bits in total. The MCS / RV information corresponding to 3 bits may include RV information corresponding to 2 bits and MCS information (QPSK or 16QAM) corresponding to 1 bit. Or MCS / RV information corresponding to 3 bits can indicate 8 MCS / RV index among 32 MCS / RV indexes that can be transmitted in 5 bits.

및 상향링크 DM-RS 시퀀스가 할당되는 시간 자원 영역(제1 슬롯, 제2 슬롯)을 결정할 수 있다.The first terminal 1410 may determine a time resource region to which the uplink DM-RS sequence and / or the uplink DM-RS sequence is allocated according to the NDI information and the MCS / RV information to be transmitted to the second terminal 1420. Specifically, the first terminal 1410 may generate an uplink DM-RS sequence according to the NDI information, the MCS / RV information,

And a time resource region (first slot, second slot) to which the uplink DM-RS sequence is allocated.

를 기반으로 상향링크 DM-RS 시퀀스를 생성하고, 생성된 DM-RS 시퀀스를 결정된 시간 자원 영역에 할당할 수 있다.The first terminal 1410 may determine

RS sequence, and allocate the generated DM-RS sequence to the determined time resource area.

및 생성된 상향링크 DM-RS 시퀀스가 할당되는 자원 영역은 미리 결정된 값이거나 미리 설정된 값일 수 있다.NDI information, an uplink DM-RS used for generating an uplink DM-RS sequence according to MCS / RV information

And the resource region to which the generated uplink DM-RS sequence is allocated may be a predetermined value or a preset value.

및 상향링크 DM-RS 시퀀스가 할당되는 자원 영역을 기반으로 제1 단말(1410)로부터 NDI 정보, MCS/RV 정보를 내재적으로 수신할 수 있다. 본 발명의 실시예에 따르면, 서로 다른 시간 자원으로 정의되는 복수의 자원 영역에 서로 다른 상향링크 DM-RS 시퀀스가 할당될 수 있다. 서로 다른 시간 자원 영역에 할당된 서로 다른 상향링크 DM-RS 시퀀스를 기반으로 NDI 정보 및 MCS/RV 정보를 송신 및 수신할 수 있다.
The second terminal 1420 is used to generate the uplink DM-RS sequence received from the first terminal 1410

And MCS / RV information from the first terminal 1410 based on the resource region to which the uplink DM-RS sequence is allocated. According to an embodiment of the present invention, different uplink DM-RS sequences may be allocated to a plurality of resource regions defined as different time resources. It is possible to transmit and receive NDI information and MCS / RV information based on different uplink DM-RS sequences assigned to different time resource regions.

15 is a conceptual diagram illustrating a method of assigning different uplink DM-RS sequences to different resources according to an embodiment of the present invention.

Referring to FIG. 15, different uplink DM-RS sequences may be allocated to different time resources in order to transmit NDI information and MSC / RV information. The UE may map the first uplink DM-RS sequence to the first slot 1510 and the second uplink DM-RS sequence to the second slot 1520.

That is, in the embodiment of the present invention, two resource regions (first resource region 1550, second resource region 1550, and second resource region 1550) are divided into two slots (first slot 1510 and second slot 1520) included in one subframe in the time domain. ), And the second resource area 1560), respectively, to transmit NDI information and MCS / RV information.

및 제2 자원 영역(1560)을 통해 전송되는 제2 상향링크 DM-RS 시퀀스의 제2

를 나타낸다.Table 18 below indicates NDI information, MCS / RV information (in this case, MCS / RV information is information in which MCS information and RV information are independently encoded with information corresponding to one bit and information corresponding to two bits) Of the first uplink DM-RS sequence transmitted through the first resource region 1550 used for the first uplink DM-

And the second uplink DM-RS sequence transmitted through the second resource region 1560

.

<Table 18>

의 값 및 제2 슬롯(1520)을 통해 전송되는 제2 상향링크 DM-RS 시퀀스의 제2

의 값을 기반으로 NDI 정보, MCS/RV 정보를 지시할 수 있다. 예를 들어, 제1 슬롯(1510)을 통해 전송되는 제1 상향링크 DM-RS 시퀀스의

가 0이고, 제2 슬롯(1520)을 통해 전송되는 제2 상향링크 DM-RS 시퀀스의

가 0인 경우, NDI 정보는 0, RV 정보는 0, MCS는 QPSK로 지시될 수 있다. Referring to Table 18, the first uplink DM-RS sequence transmitted through the first slot 1510,

Of the second uplink DM-RS sequence transmitted through the second slot 1520 and the second uplink DM-

The NDI information, and the MCS / RV information based on the value of the MCS / RV. For example, the first uplink DM-RS sequence transmitted through the first slot 1510

Is 0, and the second uplink DM-RS sequence transmitted through the second slot 1520

Is 0, the NDI information may be indicated as 0, the RV information may be indicated as 0, and the MCS may be indicated as QPSK.

가 0이고 제2 슬롯(1520)을 통해 전송되는 제1 상향링크 DM-RS 시퀀스의

가 6인 경우, NDI 정보는 0, RV 정보는 1, MCS는 QPSK로 지시될 수 있다. 상향링크 DM-RS 시퀀스의 직교 시퀀스는 NDI 정보 및 RV 정보를 지시하기 위해 사용되지 않을 수 있다.In another example, the first uplink DM-RS sequence transmitted through the first slot 1510

Of the first uplink DM-RS sequence transmitted through the second slot &lt; RTI ID = 0.0 &gt; 1520 &lt; / RTI &

Is 6, the NDI information may be indicated as 0, the RV information may be indicated as 1, and the MCS may be indicated as QPSK. The orthogonal sequence of the uplink DM-RS sequence may not be used to indicate NDI information and RV information.

의 값인 0, 6, 3, 9 각각은 NDI 정보(0 또는 1)와 MCS(QPSK 또는 16QAM)를 지시하기 위해 사용될 수 있다. 또한, 제2

의 값인 0, 6, 3, 9는 RV 정보(0, 1, 2 및 3 중 하나)를 지시하기 위해 사용될 수 있다.
Referring to Table 18,

Each of the values 0, 6, 3, 9 can be used to indicate NDI information (0 or 1) and MCS (QPSK or 16QAM). In addition,

0, 6, 3, 9 can be used to indicate RV information (one of 0, 1, 2 and 3).

및 제2 자원 영역을 통해 전송되는 제2 DM-RS 시퀀스의 제2

를 나타낸다.Table 19 below shows the first DMs transmitted via the first resource area used for indicating NDI information and MCS / RV information (in this case, MCS / RV information is 3-bit information encoded together with MCS information and RV information) First of the -RS sequence

And a second DM-RS sequence transmitted through a second resource region

.

<Table 19>

의 값 및 제2 슬롯(1520)을 통해 전송되는 제2 상향링크 DM-RS 시퀀스의 제2

의 값을 기반으로 NDI 정보, MCS/RV 정보를 지시할 수 있다. 표 19에는 MCS/RV 정보는 8개의 MCS/RV 인덱스를 기반으로 전송될 수 있다.Referring to Table 19, a first uplink DM-RS sequence transmitted through a first slot 1510,

Of the second uplink DM-RS sequence transmitted through the second slot 1520 and the second uplink DM-

The NDI information, and the MCS / RV information based on the value of the MCS / RV. In Table 19, the MCS / RV information can be transmitted based on eight MCS / RV indexes.

가 0이고, 제2 슬롯(1520)을 통해 전송되는 제2 상향링크 DM-RS 시퀀스의

가 0인 경우, NDI 정보는 0, MCS/RV 인덱스는 0으로 지시될 수 있다.For example, the first uplink DM-RS sequence transmitted through the first slot 1510

Is 0, and the second uplink DM-RS sequence transmitted through the second slot 1520

Is 0, the NDI information may be indicated as 0, and the MCS / RV index may be indicated as 0.

가 0이고 제2 슬롯(1520)을 통해 전송되는 제2 상향링크 DM-RS 시퀀스의

가 6인 경우, NDI 정보는 0, MCS/RV 인덱스는 1로 지시될 수 있다. 상향링크 DM-RS 시퀀스의 직교 시퀀스는 NDI 정보 및 MCS/RV 정보를 지시하기 위해 사용되지 않을 수 있다.In another example, the first uplink DM-RS sequence transmitted through the first slot 1510

RS sequence transmitted through the second slot 1520 of the second uplink DM-RS sequence &lt; RTI ID = 0.0 &gt;

Is 6, the NDI information can be indicated as 0 and the MCS / RV index can be indicated as 1. The orthogonal sequence of the uplink DM-RS sequence may not be used to indicate NDI information and MCS / RV information.

의 값인 (0, 6) 및 (3, 9) 각각은 서로 다른 NDI 정보(0 또는 1)를 지시하기 위해 사용될 수 있다. 또한, 제1

의 값과 제2

의 값을 기반으로 한 8가지의 조합은 8개의 MCS/RV 인덱스를 지시하기 위해 사용될 수 있다.
Referring to Table 19, in the first slot,

(0, 6) and (3, 9), which are the values of the NDI information, can be used to indicate different NDI information (0 or 1). In addition,

And the second

8 combinations may be used to indicate eight MCS / RV indices.

및 직교 시퀀스를 나타낸다.Table 20 below shows the DM-RS sequence for indicating NDI information and MCS / RV information.

And an orthogonal sequence.

<Table 20>

의 값 및 직교시퀀스를 기반으로 NDI 정보, MCS/RV 정보를 지시할 수 있다. 표 20에서 MCS/RV 정보는 8개의 MCS/RV 인덱스를 기반으로 전송될 수 있다. 예를 들어, 상향링크 DM-RS 시퀀스의

가 0이고, 직교 시퀀스가 [1 1]인 경우, NDI 정보는 0, MCS/RV 인덱스는 0으로 지시될 수 있다. 또 다른 예로, 상향링크 DM-RS 시퀀스의

가 0이고, 직교 시퀀스가 [1 -1]인 경우, NDI 정보는 1, MCS/RV 인덱스는 0으로 지시될 수 있다.Referring to Table 20, for the DM-RS sequence

And the NDI information and the MCS / RV information based on the orthogonal sequence. In Table 20, the MCS / RV information can be transmitted based on eight MCS / RV indexes. For example, the uplink DM-RS sequence

Is 0 and the orthogonal sequence is [1 1], the NDI information may be indicated by 0 and the MCS / RV index may be indicated by 0. As another example, the uplink DM-RS sequence

Is 0, and the orthogonal sequence is [1 -1], the NDI information may be indicated by 1 and the MCS / RV index may be indicated by 0.

값 각각은 8가지 경우의 MCS/RV 인덱스 값들 중 하나를 지시하는데 사용될 수 있다
Referring to Table 20, each of the two orthogonal sequences ([1, 1], [1, -1]) may be used to indicate one of two cases of NDI. 8 kinds of

Each of the values may be used to indicate one of the eight case MCS / RV index values

16 is a block diagram illustrating a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 16, a first terminal 1600 includes a processor 1610, a memory 1620, and a RF unit (radio frequency) unit 1630. The memory 1620 is coupled to the processor 1610 to store various information for driving the processor 1610. RF section 1620 is coupled to processor 1610 to transmit or receive a radio signal (e.g., D2D data, an uplink DM-RS sequence published herein). The processor 1610 may generate the DM-RS sequence based on control information transmitted to the second terminal 1650. The operation of the terminal posted in FIGS. 1 to 15 may be implemented by the processor 1610 of the first terminal 1600.

The second terminal 1650 includes a processor 1660, a memory 1670 and an RF section 1680. The memory 1670 is coupled to the processor 1660 and stores various information for driving the processor 1660. RF section 1680 may be coupled to processor 1660 to transmit or receive a radio signal (e.g., D2D data, an uplink DM-RS sequence published herein). Processes and / or methods proposed in the embodiments according to Figs. 1-15 of the present invention. For example, the processor 1660 may receive the uplink DM-RS sequence from the first terminal 1600 and obtain control information based on the received uplink DM-RS sequence.

The processor may comprise an application-specific integrated circuit (ASIC), another chipset, a logic circuit, and / or a data processing device. The memory may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media, and / or other storage devices. The RF unit may include a baseband circuit for processing the radio signal. When the embodiment is implemented in software, the above-described techniques may be implemented with modules (processes, functions, and so on) that perform the functions described above. The module is stored in memory and can be executed by the processor. The memory may be internal or external to the processor and may be coupled to the processor by any of a variety of well known means.

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 scope of the present invention but to limit the scope of the technical idea of the present invention. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (16)

In an uplink DM (demodulation) -RS (reference signal) sequence transmission method of a first terminal,
Determining, by the first terminal, control information to be transmitted to the second terminal;
The first terminal generates an uplink DM-RS sequence based on the control information and maps the uplink DM-RS sequence to a transmission resource;
And transmitting, by the first terminal, the uplink DM-RS sequence to the second terminal via the transmission resource,
Wherein the uplink DM-RS sequence is generated in consideration of a generation variable determined based on the control information,
The generation variable

And an orthogonal sequence of the uplink DM-RS sequence. The method according to claim 1,
Wherein the control information includes new data indicator (NDI) information,
remind

Lt; / RTI &gt; comprises a first value and a second value,
If the value of the NDI information is 0, the uplink DM-RS sequence is generated based on a first value,
And if the value of the NDI information is 1, the uplink DM-RS sequence is generated based on the second value,
Wherein the first value and the second value have a difference of 6. The method according to claim 1,
Wherein the control information includes new data indicator (NDI) information,
Wherein the orthogonal sequence comprises a first orthogonal sequence and a second orthogonal sequence,
If the value of the NDI information is 0, the uplink DM-RS sequence is generated based on the first orthogonal sequence,
And if the value of the NDI information is 1, the uplink DM-RS sequence is generated based on the second orthogonal sequence. The method according to claim 1,
The control information includes new data indicator (NDI) information and modulation and coding scheme (MCS) / redundancy version (RV)
remind

Lt; / RTI &gt; comprises a first value and a second value,
And if the NDI information and the MCS / RV information indicate a first information combination, the uplink DM-RS sequence is generated based on the first value,
And if the NDI information and the MCS / RV information indicate a second information combination, the uplink DM-RS sequence is determined to be the second value,
Wherein the MCS / RV information in each of the first information combination and the second information combination is the same, the NDI information is different from each other,
Wherein the first value and the second value have a difference of 6. The method according to claim 1,
The control information includes new data indicator (NDI) information and modulation and coding scheme (MCS) / redundancy version (RV)
remind

Lt; / RTI &gt; comprises a first value and a second value,
Wherein the orthogonal sequence comprises a first orthogonal sequence and a second orthogonal sequence,
Wherein the uplink DM-RS sequence is generated based on the first value and the first orthogonal sequence when the NDI information and the MCS / RV information indicate a first information combination,
Wherein the uplink DM-RS sequence is generated based on the second value and the second orthogonal sequence when the NDI information and the MCS / RV information indicate a second information combination,
Wherein the MCS / RV information is the same in each of the first information combination and the second information combination, and the NDI information is different from each other. The method according to claim 1,
Wherein the control information includes new data indicator (NDI) information and transmission terminal identifier information,
The uplink DM-RS sequence is generated considering the position of the transmission resource to which the uplink DM-RS sequence is mapped according to the control information,
The uplink DM-RS sequence includes a first uplink DM-RS sequence, a second uplink DM-RS sequence, a third uplink DM-RS sequence, and a fourth uplink DM-RS sequence,
Wherein the transmission resource includes a first resource region, a second resource region, a third resource region, and a fourth resource region that are divided based on the transmission resource location,
The first uplink DM-RS sequence is generated based on the NDI information and mapped to the first resource region,
Wherein the second uplink DM-RS sequence is generated based on the transmission terminal identifier information and is mapped to the second resource area,
The third uplink DM-RS sequence is generated based on the transmission terminal identifier information and is mapped to the third resource region,
Wherein the fourth uplink DM-RS sequence is generated based on the transmission terminal identifier information and mapped to the fourth resource region. The method according to claim 1,
The control information includes new data indicator (NDI) information, modulation and coding scheme (MCS) / redundancy version (RVS) information, and transmission terminal identifier information,
The uplink DM-RS sequence is generated considering the position of the transmission resource to which the uplink DM-RS sequence is mapped according to the control information,
The uplink DM-RS sequence includes a first uplink DM-RS sequence, a second uplink DM-RS sequence, a third uplink DM-RS sequence, and a fourth uplink DM-RS sequence,
Wherein the transmission resource includes a first resource region, a second resource region, a third resource region, and a fourth resource region that are classified based on the transmission resource location,
The first uplink DM-RS sequence is generated based on the NDI information and the MCS / RV information and is mapped to the first resource area,
Wherein the second uplink DM-RS sequence is generated based on the transmission terminal identifier information and is mapped to the second resource area,
The third uplink DM-RS sequence is generated based on the transmission terminal identifier information and is mapped to the third resource region,
Wherein the fourth uplink DM-RS sequence is generated based on the transmission terminal identifier information and mapped to the fourth resource region. The method according to claim 1,
The control information includes new data indicator (NDI) information, modulation and coding scheme (MCS) / redundancy version (RV)
The uplink DM-RS sequence is generated considering the position of the transmission resource to which the uplink DM-RS sequence is mapped according to the control information,
The uplink DM-RS sequence includes a first uplink DM-RS sequence and a second uplink DM-RS sequence,
Wherein the transmission resource includes a first slot and a second slot that are divided based on a position in the time domain of the transmission resource,
The first uplink DM-RS sequence is generated based on the NDI information and the MCS / RV information and is mapped to the first slot,
Wherein the second uplink DM-RS sequence is generated based on the NDI information and the MCS / RV information and is mapped to the second slot. A terminal for transmitting an uplink DM (demodulation) -RS (reference signal) sequence,
A radio frequency (RF) unit configured to transmit and receive a wireless signal; And
And a processor selectively coupled to the RF unit,
The processor determines the control information to be transmitted to the second terminal by the first terminal,
Generates an uplink DM-RS sequence based on the control information, maps the uplink DM-RS sequence to a transmission resource,
And transmit the uplink DM-RS sequence to the second terminal through the transmission resource,
Wherein the uplink DM-RS sequence is generated in consideration of a generation variable determined based on the control information,
The generation variable

And an orthogonal sequence. 10. The method of claim 9,
Wherein the control information includes new data indicator (NDI) information,
remind

Lt; / RTI &gt; comprises a first value and a second value,
If the value of the NDI information is 0, the uplink DM-RS sequence is generated based on a first value,
And if the value of the NDI information is 1, the uplink DM-RS sequence is generated based on the second value,
Wherein the first value and the second value have a difference of 6. 10. The method of claim 9,
Wherein the control information includes new data indicator (NDI) information,
Wherein the orthogonal sequence comprises a first orthogonal sequence and a second orthogonal sequence,
If the value of the NDI information is 0, the uplink DM-RS sequence is generated based on the first orthogonal sequence,
Wherein the uplink DM-RS sequence is generated based on the second orthogonal sequence when the value of the NDI information is 1. [ 10. The method of claim 9,
The control information includes new data indicator (NDI) information and modulation and coding scheme (MCS) / redundancy version (RV)
remind

Lt; / RTI &gt; comprises a first value and a second value,
And if the NDI information and the MCS / RV information indicate a first information combination, the uplink DM-RS sequence is generated based on the first value,
And if the NDI information and the MCS / RV information indicate a second information combination, the uplink DM-RS sequence is determined to be the second value,
Wherein the MCS / RV information in each of the first information combination and the second information combination is the same, the NDI information is different from each other,
Wherein the first value and the second value have a difference of 6. 10. The method of claim 9,
The control information includes new data indicator (NDI) information and modulation and coding scheme (MCS) / redundancy version (RV)
remind

Lt; / RTI &gt; comprises a first value and a second value,
Wherein the orthogonal sequence comprises a first orthogonal sequence and a second orthogonal sequence,
Wherein the uplink DM-RS sequence is generated based on the first value and the first orthogonal sequence when the NDI information and the MCS / RV information indicate a first information combination,
Wherein the uplink DM-RS sequence is generated based on the second value and the second orthogonal sequence when the NDI information and the MCS / RV information indicate a second information combination,
Wherein the MCS / RV information is the same in each of the first information combination and the second information combination, and the NDI information is different from each other. 10. The method of claim 9,
Wherein the control information includes new data indicator (NDI) information and transmission terminal identifier information,
The uplink DM-RS sequence is generated considering the position of the transmission resource to which the uplink DM-RS sequence is mapped according to the control information,
The uplink DM-RS sequence includes a first uplink DM-RS sequence, a second uplink DM-RS sequence, a third uplink DM-RS sequence, and a fourth uplink DM-RS sequence,
Wherein the transmission resource includes a first resource region, a second resource region, a third resource region, and a fourth resource region that are classified based on the transmission resource location,
The first uplink DM-RS sequence is generated based on the NDI information and mapped to the first resource region,
Wherein the second uplink DM-RS sequence is generated based on the transmission terminal identifier information and is mapped to the second resource area,
The third uplink DM-RS sequence is generated based on the transmission terminal identifier information and is mapped to the third resource region,
Wherein the fourth uplink DM-RS sequence is generated based on the transmission terminal identifier information and mapped to the fourth resource region. 10. The method of claim 9,
The control information includes new data indicator (NDI) information, modulation and coding scheme (MCS) / redundancy version (RVS) information, and transmission terminal identifier information,
The uplink DM-RS sequence is generated considering the position of the transmission resource to which the uplink DM-RS sequence is mapped according to the control information,
The uplink DM-RS sequence includes a first uplink DM-RS sequence, a second uplink DM-RS sequence, a third uplink DM-RS sequence, and a fourth uplink DM-RS sequence,
Wherein the transmission resource includes a first resource region, a second resource region, a third resource region, and a fourth resource region that are classified based on the transmission resource location,
The first uplink DM-RS sequence is generated based on the NDI information and the MCS / RV information and is mapped to the first resource area,
Wherein the second uplink DM-RS sequence is generated based on the transmission terminal identifier information and is mapped to the second resource area,
The third uplink DM-RS sequence is generated based on the transmission terminal identifier information and is mapped to the third resource region,
Wherein the fourth uplink DM-RS sequence is generated based on the transmission terminal identifier information and mapped to the fourth resource region. 10. The method of claim 9,
The control information includes new data indicator (NDI) information, modulation and coding scheme (MCS) / redundancy version (RV)
The uplink DM-RS sequence is generated considering the position of the transmission resource to which the uplink DM-RS sequence is mapped according to the control information,
The uplink DM-RS sequence includes a first uplink DM-RS sequence and a second uplink DM-RS sequence,
Wherein the transmission resource includes a first slot and a second slot that are divided based on a position in the time domain of the transmission resource,
The first uplink DM-RS sequence is generated based on the NDI information and the MCS / RV information and is mapped to the first slot,
Wherein the second uplink DM-RS sequence is generated based on the NDI information and the MCS / RV information and is mapped to the second slot.

Images