KR20160018247A - Apparatus and method for determining d2d data resource on d2d communication - Google Patents

Abstract

A method and a device for determining a device-to-device (D2D) data resource for D2D communications are disclosed. The method for determining a D2D data transmission resource in D2D communications comprises the following steps: a terminal receives cell-specific information and terminal-specific information; and the terminal determines a group of unit D2D data transmission resources allocated by having a D2D data transmission resource distance on a time resource after a D2D data transmission resource offset of time resources within a D2D data allocation period, to the unit D2D data transmission resource.

Description

[0001] APPARATUS AND METHOD FOR DETERMINING D2D DATA RESOURCE ON D2D COMMUNICATION [0002]

The present invention relates to wireless communications, and more particularly, to a method and apparatus for determining D2D data resources in D2D (device to device) communications.

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)

However, actual LTE wireless communication systems are not determined to use data resources to efficiently provide D2D services. Therefore, it is necessary to use resources for more efficient service support.

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for determining D2D data resources in D2D communication.

It is another object of the present invention to provide a method and apparatus for transmitting and receiving parameters for determining D2D data resources in D2D communication.

According to an aspect of the present invention, there is provided a method of determining a D2D data transmission resource in a D2D (Device to Device) communication, the method comprising: receiving a cell identification information and terminal identification information; And determining a set of the unit D2D data transmission resources allocated with the D2D data transmission resource interval on the time resource after the D2D data transmission resource offset among the time resources in the D2D data allocation period as the D2D data transmission resource , The cell identification information includes information on the D2D data allocation period and the D2D data transmission resource interval, and the UE identification information may include information on the D2D data transmission resource offset.

According to another aspect of the present invention, a terminal for determining a D2D data transmission resource in a D2D (Device to Device) communication includes a communication unit configured to transmit and receive a wireless signal, The processor may receive the cell specific information and the UE-specific information, and may allocate the D2D data transmission resource interval on the time resource after the D2D data transmission resource offset among the time resources in the D2D data allocation period D2D data transmission resources, and the cell identification information includes information on the D2D data allocation period and the D2D data transmission resource interval, and the cell identification information includes information on the D2D data transmission resource interval, The UE-specific information includes information on the D2D data transmission resource offset Can.

The collision or interference between the terminals due to the transmission and / or reception of the D2D data can be minimized based on the allocation of the D2D data resources used for the D2D communication. Therefore, the performance of the D2D data transmission can be improved.

1 is a conceptual diagram illustrating the structure of a radio frame to which the present invention is applied.
2 is a conceptual diagram illustrating the structure of a radio frame to which the present invention is applied.
3 is a conceptual diagram showing D2D communication.
4 is a conceptual diagram illustrating allocation of D2D data transmission resources according to an embodiment of the present invention.
5 is a conceptual diagram illustrating a method of allocating D2D data transmission resources in D2D communication according to an embodiment of the present invention.
6 is a conceptual diagram illustrating a method for transmitting information for D2D communication according to an embodiment of the present invention.
7 is a conceptual diagram illustrating a method for transmitting information for D2D communication according to an embodiment of the present invention.
8 is a conceptual diagram illustrating operations of a first terminal and a second terminal in an FDD according to an embodiment of the present invention.
9 is a conceptual diagram illustrating operations of a first terminal and a second terminal in TDD according to an embodiment of the present invention.
10 is a flowchart illustrating a transmission operation of traffic data of a terminal according to an embodiment of the present invention.
11 is a flowchart illustrating a reception operation of traffic data of a terminal according to an embodiment of the present invention.
12 is a block diagram illustrating a base station and a terminal 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.

1 is a conceptual diagram illustrating the structure of a radio frame to which the present invention is applied.

1, a radio frame structure for frequency division duplexing (FDD) -based D2D (device-to-device) communication is disclosed.

Referring to FIG. 1, a radio frame for FDD includes 10 subframes. One subframe includes two slots. A time corresponding to one subframe is referred to as a transmission time interval (TTI). The length of one subframe (1 subframe) may be 1 ms and the length of one slot (slot) may be 0.5 ms.

One slot may contain a plurality of symbols in the time domain. Each of the plurality of symbols may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol according to an access method.

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.

In the case of FDD, if there are two carrier frequencies, each of the two carrier frequencies may be used for uplink and downlink transmissions. Hereinafter, uplink transmission in D2D communication refers to data transmission from a terminal to another terminal or a base station based on one D2D terminal (hereinafter referred to as terminal) supporting specific D2D communication, and uplink data is transmitted from the terminal to another terminal May refer to data transmitted to the base station. Also, downlink transmission means data transmission from another terminal or base station to a terminal based on a terminal, and downlink data means data transmitted from another terminal or a base station to a terminal based on the terminal.

In case of FDD, which is a duplexing scheme, downlink transmission and uplink transmission can be simultaneously performed in a cell. In the FDD, even if uplink and downlink transmission are possible in one cell, downlink transmission and uplink transmission are simultaneously performed in a cell depending on whether the terminal supports full duplex or half duplex It may not be performed. For example, if the terminal is operating in full-duplex mode, the terminal can simultaneously receive downlink data and transmit uplink data. However, when the terminal operates in the half-duplex mode, the terminal can not perform the reception operation of the downlink data and the reception operation of the uplink data at the same time.

In D2D communication, when a terminal operates in a full-duplex state, the terminal can simultaneously receive downlink data from another terminal or a base station and transmit uplink data to another terminal or a base station. However, when the terminal operates in a half-duplex mode, the terminal can not simultaneously perform operations for receiving downlink data from another terminal or a base station and transmitting uplink data to another terminal or a base station.

2 is a conceptual diagram illustrating the structure of a radio frame to which the present invention is applied.

2, a wireless frame structure for time division duplexing (TDD) based D2D communication is disclosed.

Referring to FIG. 2, a radio frame structure for TDD includes 10 subframes as well as a radio frame structure for FDD. One subframe includes two slots. The basic radio frame structure is similar, but a specific subframe among the subframes included in the radio frame for TDD may be defined as a special subframe. The special subframe may be a time resource for switching between uplink transmission and downlink reception. The special subframe may include a downlink portion (DwPTS), a guard period (GP), and an uplink portion (UpPTS).

In TDD, there is only one carrier frequency, so that uplink transmission and downlink transmission can be temporally distinguished based on one cell. For example, a terminal performing D2D communication transmits uplink data to a different terminal or a base station in a time resource for uplink transmission on one carrier frequency, downlinks from another terminal or a base station in a time resource for downlink transmission, Link data can be received.

3 is a conceptual diagram showing D2D communication.

Hereinafter, it is assumed that the terminal to be published in the embodiment of the present invention supports D2D communication.

In D2D communication, data can be directly transmitted or received between terminals. Therefore, when the terminals at close distances in the cellular system perform D2D communication, the load of the base station can be dispersed. Also, 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 from the viewpoint of the whole system.

D2D communication can be classified into a communication method of a terminal located within a network coverage (base station coverage) and a communication method of a terminal located outside a network coverage (base station coverage).

3, communication between a first terminal 310 located in a first cell and a second terminal 320 located in a second cell may be a D2D communication between a terminal located within network coverage and a terminal located within another network coverage have. The communication between the fourth terminal 340 located in the first cluster and the fifth terminal 350 located in the first cluster may be a D2D communication between terminals located outside the network coverage. The fifth terminal 350 is the cluster header, and the cluster header may operate as an ISS (Independent Synchronization Source) for synchronization of an Out-of-coverage terminal.

In the D2D communication, a search procedure for performing discovery for communication between terminals can be performed. After the search procedure is performed, a direct communication procedure for transmitting and receiving control data and / or traffic data between terminals can be performed.

D2D communication can be used for various purposes. For example, D2D communications within network coverage may be used for purposes other than public safety and public safety (such as for commercial purposes). D2D communication outside network coverage may be used only for public safety.

D2D communications located within the base station coverage may be performed based on the base station 300. For example, the base station 300 may transmit D2D resource allocation information to a first terminal 310 located within base station coverage. The D2D resource allocation information may include allocation information for a D2D communication resource for D2D communication between the first terminal 310 and another terminal (e.g., the second terminal 320). The first terminal 310 receiving the D2D resource allocation information from the base station 300 may transmit the D2D resource allocation information to the second terminal 320 outside the base station coverage. The second terminal 320 may be a terminal located outside the coverage of the base station 300 in view of the base station 300 of the first cell. The first terminal 310 and the second terminal 320 can perform D2D communication based on the D2D resource allocation information. Specifically, the second terminal 320 can acquire information on the D2D communication resources of the first terminal 310. [ The second terminal 320 can receive traffic data and / or control data transmitted from the first terminal 310 through the resources indicated by the information on the D2D communication resources of the first terminal 310. [

In D2D communication, a terminal can transmit control data to another terminal. A separate channel (for example, a physical uplink control channel (PUCCH)) for transmitting control data 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 control data for D2D communication. In D2D communication, control data may also be expressed in terms of scheduling assignment (SA) information.

In the first mode communication, the base station or the relay node can schedule accurate information on the D2D communication resources of the UE based on the D2D resource pool. Specifically, in the first mode communication, the base station can transmit information on D2D communication resources for control data (or SA data) and information on D2D communication resources for traffic data to the mobile station.

In the second mode communication, the UE can directly schedule D2D communication resources based on the D2D resource pool. Specifically, in the second mode communication, information on D2D communication resources for control data and information on D2D communication resources for traffic data can be selected in the D2D resource pool by the terminal. D2D resource pools can be pre-configured or semi-statically allocated.

Within network coverage, a first mode communication or a second mode communication may be used for D2D communication, and a second mode communication may be used for D2D communication outside network coverage.

D2D communication resources for transmitting or receiving control data or traffic data for D2D communication may include D2D SA resources for transmission of control data and D2D data resources for transmission of traffic data.

The D2D data resource may be a resource used for transmission and / or reception of traffic data in D2D communication. The D2D data resource can be defined in units of resource blocks (RB) on the frequency axis in units of subframes on the time axis, but is not limited thereto. The D2D data resource may be a candidate resource capable of transmitting traffic data by the D2D terminal. That is, the D2D data resource may be expressed in other terms by the terms D2D data candidate resource or D2D data transmission opportunity. The terminal may transmit traffic data through all or some of the D2D data resources of the D2D data resources. The D2D data resource used by the terminal to actually transmit traffic data may be expressed in terms of a selected D2D data resource.

The D2D SA resource may be a resource used for transmission and / or reception of control data in D2D communication. Similarly, the D2D SA resource can be defined in units of resource blocks (RB) on the frequency axis in units of subframes on the time axis, but is not limited thereto. The D2D SA resource may be a candidate resource capable of transmitting control data by the D2D terminal. That is, the D2D SA resources may be expressed in other terms by the terms D2D SA candidate resources or D2D SA transmission opportunities. The UE may transmit control data through some D2D SA resources among the D2D SA resources. The D2D SA resource that the terminal actually uses to transmit control data can be expressed in terms of the selected D2D SA resource.

Each of the selected D2D data resource and the selected D2D SA resource may be defined as a pattern on each of the D2D data resource and the D2D SA resource. The pattern for the selected D2D data resource and / or the selected D2D SA resource may be expressed by the term resource pattern for transmission (RPT), and may be expressed in terms of time resource pattern for transmission (T-RPT) have.

A set of D2D data resources can be expressed as a D2D data resource pool, and a set of D2D SA resources can be expressed as a D2D SA resource pool. The term D2D resource pool can be used as a concept that includes a D2D data resource pool and a D2D SA resource pool.

Hereinafter, a method of defining a D2D data resource in the D2D data allocation period will be described in detail. Hereinafter, the D2D data resource can be divided into a D2D data transmission resource, which is a resource for transmission of D2D data, and a D2D data reception resource, which is a resource for receiving D2D data.

4 is a conceptual diagram illustrating allocation of D2D data transmission resources according to an embodiment of the present invention.

In FIG. 4, the D2D data transmission resource allocated in the D2D data allocation period is started.

Referring to FIG. 4, the D2D data allocation period 400 may be a predetermined time unit for allocation of D2D data transmission resources. The D2D data allocation period 400 may be a predefined value or a selected one of a plurality of predetermined D2D data allocation period values. For example, the D2D data allocation period 400 may be 40 ms, 80 ms, 160 ms, and 320 ms. When the D2D data allocation period 400 is expressed in units of subframes, the D2D data allocation period 400 may be 40, 80, 160, or 320 subframe units.

The D2D data transmission resource (or transmission opportunity) may be defined in at least one subframe unit within the D2D data allocation period 400. [ The D2D data transmission resource defined in units of at least one subframe can be represented by the term unit D2D data transmission resource 420. [ That is, the D2D data transmission resource defined in the D2D data allocation period 400 may be a set of at least one unit D2D data transmission resource 420. [ The unit D2D data transmission resource 420 may be defined in units of one subframe as shown in FIG. 4, but may be defined in units of a plurality of subframes. Hereinafter, it is assumed that a unit D2D data transmission resource 420 is set in units of one subframe.

One D2D data transmission unit may be transmitted on the unit D2D data transmission resource 420. [ The D2D data transmission unit may be a MAC PDU (protocol data unit) on the MAC layer, and a data transport block (TB) on the physical layer.

According to an embodiment of the present invention, the D2D data transmission resource may be allocated in consideration of the D2D data transmission resource interval 460 and the D2D data transmission resource offset 440 on the D2D data allocation period.

The D2D data transmission resource interval 460 may be the interval between two adjacent unit D2D data transmission resources. When the two adjacent unit D2D data transmission resources are referred to as a first unit D2D data transmission resource and a second unit D2D data transmission resource, the second unit D2D data transmission resource after the D2D data transmission resource interval from the first unit D2D data transmission resource, It may mean that a transmission resource exists. The D2D data transmission resource interval 460 may be a time interval corresponding to four or more subframes. That is, there may be a second unit of D2D data transmission resource adjacent to the first unit D2D data transmission resource after a time interval corresponding to four or more subframes from the first unit D2D data transmission resource.

For example, the D2D data transmission resource interval 460 may be a time interval corresponding to five or ten subframes. The D2D data transmission resource interval 460 corresponding to four or more subframes is a value set in consideration of the UL decoding time of the UE. However, the D2D data transmission resource interval 460 may not be limited to the D2D data transmission resource interval 460 corresponding to four or more subframes, but may be a time interval corresponding to less than four subframes.

The D2D data transmission resource offset 440 may indicate an allocation position of the first unit D2D data transmission resource on the D2D data allocation period. The D2D data transmission resource offset 440 may be a time interval corresponding to N subframes on the time axis. The time interval corresponding to the D2D data transmission resource offset 440 may be a value smaller than the time interval corresponding to the D2D data transmission resource interval 460. [ For example, if the D2D data transmission resource interval 460 is a time interval corresponding to four subframes, the D2D data transmission resource offset 440 may be a time interval corresponding to three or less subframes.

The information on the D2D data allocation period 400 and the information on the D2D data transmission resource interval 460 may be common information for the terminals included in the terminal set. The information on the D2D data transmission resource offset 440 may be a set of lower terminals included in the terminal set or information specific to a specific terminal. The terminal aggregation can be defined in various ways. For example, in a first mode of communication (e.g., D2D communication within network coverage), the terminal aggregation may include information on the D2D data allocation period 400 determined based on the base station, information on the D2D data transmission resource interval 460 And a D2D data transmission resource offset 440. The D2D data transmission resource offset 440 may be a set of terminals performing D2D communication. The terminal aggregation of the first mode communication may be a terminal in the base station coverage, or a terminal outside the base station coverage that performs D2D communication with the terminal in the base station coverage.

In a second mode of communication (e. G., D2D communication outside the network coverage (second mode communication may also be applied in D2D communication within network coverage as discussed above)) the terminal aggregation comprises a D2D data allocation period 400, information on the D2D data transmission resource interval 460, and information on the D2D data transmission resource offset 440. For example, the terminal aggregation of the second mode communication may be a terminal in ISS (Independent Synchronization Source) coverage, or a terminal outside ISS coverage that performs D2D communication with a terminal in ISS coverage. Here, the ISS may be a D2D synchronization source other than the base station (eNodeB) of the D2D synchronization source that transmits its own synchronization to the outside without transmitting synchronization from other D2D synchronization sources. The ISS can not be scheduled by another source (base station or other terminal) but can be used as a reference for the operation synchronization of the D2D communication and can schedule another terminal

Hereinafter, for convenience of description, common information about terminals included in the terminal set, such as information on the D2D data allocation period 400 and the D2D data transmission resource interval 460, may be expressed by the term cell specific information . In addition, the information on the D2D data transmission resource offset 440 or the information on the set of the lower terminals included in the terminal set or the specific terminal can be expressed by the term terminal group specific information or terminal specific information.

Different D2D data transmission resources may be allocated between terminal groups or terminals based on terminal group specific information or information on D2D data transmission resource offset 440 transmitted in the terminal identification information.

5 is a conceptual diagram illustrating a method of allocating D2D data transmission resources in D2D communication according to an embodiment of the present invention.

5, the D2D data transmission resources 500, 500 allocated to each of the UE group # 0 and UE group # 1, which are a set of lower UEs included in one UE set in the D2D data allocation period, 550). Although FIG. 5 discloses a terminal group for convenience of explanation, a method of allocating D2D data transmission resources disclosed in FIG. 5 may be applied to each of a plurality of terminals.

Referring to FIG. 5, the information on the D2D data allocation period and the information on the D2D data transmission resource interval are cell specific information. Accordingly, each of the terminal group 0 and the terminal group 1 can be allocated D2D data transmission resources 500 and 550 determined based on the same D2D data transmission resource interval on the same D2D data allocation period. For example, each of the terminal group 0 and the terminal group 1 can be allocated a D2D data transmission resource determined based on a D2D data allocation period (40 ms) and a D2D data transmission resource interval (5 ms).

The information on the D2D data transmission resource offset is terminal group specific information (or terminal specific information). Therefore, the terminal group 0 and the terminal group 1 can be allocated D2D data transmission resources determined based on different D2D data transmission resource offsets. For example, in the case of the terminal group 0, the D2D data transmission resource 500 determined based on the D2D data transmission resource offset of 2 is allocated, and the D2D data transmission resource offset 3 is allocated to the terminal group 1 (UE group # 1) The D2D data transmission resource 550 can be allocated.

Information on the D2D data allocation period and information on the D2D data transmission resource interval is cell specific information, and when the information on the D2D data transmission resource offset is the terminal group specifying information (or the terminal specifying information) Terminals can be allocated different D2D data transmission resources.

Hereinafter, a combination of the D2D data transmission resource interval and the D2D data transmission resource offset will be described. The D2D data allocation period is not limited to 40ms, 80ms, 160ms, and 320ms.

Table 1 below shows uplink frame / downlink frame setting (or uplink / downlink setting) in TDD.

<Table 1>

In case of TDD, when the uplink / downlink setting is considered in the frame, the D2D data transmission resource can be determined based on a combination of the following D2D data transmission resource interval and D2D data transmission resource offset.

Specifically, a D2D data transmission resource interval for determining a D2D data transmission resource based on a switch point period (S) and an uplink setting (U) from a downlink to an uplink in each of a plurality of uplink / Can be decided together. A plurality of D2D data transmission resource offsets represent a set of D2D data transmission resource offsets that can be selected by each of a plurality of terminals or each of a plurality of terminal groups.

(1) Uplink / downlink setting 0

1) D2D data transmission resource interval = 5, D2D data transmission resource offset = 2, 3, 4

2) D2D data transmission resource interval = 10, D2D data transmission resource offset = 2, 3, 4, 7, 8, 9

(2) Uplink / downlink setting 1

1) D2D data transmission resource interval = 5, D2D data transmission resource offset = 2, 3

2) D2D data transmission resource interval = 10, D2D data transmission resource offset = 2, 3, 7, 8

(3) Uplink / downlink setting 2

1) D2D data transmission resource interval = 5, D2D data transmission resource offset = 2

2) D2D data transmission resource interval = 10, D2D data transmission resource offset = 2, 7

(4) Setting uplink / downlink 3

1) D2D data transmission resource interval = 10, D2D data transmission resource offset = 2, 3, 4

(5) Uplink / downlink setting 4

1) D2D data transmission resource interval = 10, D2D data transmission resource offset = 2, 3

(6) Setting uplink / downlink 5

1) D2D data transmission resource interval = 10, D2D data transmission resource offset = 2

(6) Uplink / downlink setting 6

1) D2D data transmission resource interval = 5, D2D data transmission resource offset = 2, 3

2) D2D data transmission resource interval = 10, D2D data transmission resource offset = 2, 3, 4, 7, 8

In the following, when FDD is used in the duplexing scheme, the D2D data transmission resource interval and the D2D data transmission resource offset for determining the D2D data transmission resource can be determined as follows.

1) D2D data transmission resource interval = 5, D2D data transmission resource offset = 0, 1, 2, 3, 4

2) D2D data transmission resource interval = 10, D2D data transmission resource offset = 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

The D2D data transmission resource interval and the D2D data transmission resource offset according to the embodiment of the present invention are based on various combinations of the D2D data transmission resource interval and the D2D data transmission resource offset depending on whether the duplexing mode is TDD or FDD . &Lt; / RTI &gt;

The following describes a case in which some of the various combinations of D2D data transmission resource intervals and D2D data transmission resource offsets are selectively used below.

(1) First combination

The first combination is where a plurality of D2D data transmission resource offsets are defined.

1) When the switch point period (S) from the downlink to the uplink in the FDD or TDD is 5 ms

a. Uplink / downlink setting in FDD or TDD 0, 1, 6

- D2D data transmission resource interval = 5, D2D data transmission resource offset = 2, 3

b. Set uplink / downlink in TDD 2

- D2D data transmission resource interval = 5, D2D data transmission resource offset = 2

2) When the switch point period S from the downlink to the uplink in the TDD is 10 ms

a. Uplink / downlink setting in TDD 3, 4

- D2D data transmission resource interval = 10, D2D data transmission resource offset = 2, 3

b. Set uplink / downlink in TDD 5

- D2D data transmission resource interval = 10, D2D data transmission resource offset = 2

When a plurality of D2D data transmission resource offsets are defined in the first combination, the D2D data transmission resource offsets used in a terminal or a particular terminal group may be indicated in a variety of ways.

For example, N D2D data transmission resource offsets may be specified based on a UE Identifier. Information on the identifier of the UE can be transmitted to the UE through the D2D SA resource. The result of performing the modulo N operation on the value of the identifier of the UE allocated to the UE can correspond to each of the plurality of D2D data transmission resource offsets. As a specific example, it can be assumed that the D2D data transmission resource offset is 2 or 3. In this case, the modulo 2 operation is performed on the identifier of the UE, and if the result of the modulo operation is 0, the D2D data transmission resource offset 2 can be allocated to the UE. Also, if the result of the modular operation is 1, the D2D data transmission resource offset 3 can be allocated to the UE. The terminal group may be a set of terminals that perform the modular operation on the terminal identifier. Therefore, the same D2D data transmission resource can be allocated to each terminal group.

비트가 단말의 D2D 데이터 전송 자원 오프셋을 특정하기 위해 사용될 수 있다. 예를 들어, D2D 데이터 전송 자원 오프셋이 2 또는 3인 경우, 단말의 D2D 데이터 전송 자원 오프셋을 특정하기 위해 1비트의 정보가 RRC 시그널링을 통해 단말로 전송될 수 있다. 단말 그룹은 RRC 시그널링을 통해 동일한 전송 자원 오프셋을 특정하기 위한 정보를 수신한 단말의 집합일 수 있다. 따라서, 단말 그룹 별로 동일한 D2D 데이터 전송 자원을 할당 받을 수 있다.As an alternative to specifying the D2D data transmission resource offset, N D2D data transmission resource offsets can be specified through RRC signaling. If the D2D data transfer resource offset is N,

Bit may be used to specify the D2D data transmission resource offset of the terminal. For example, if the D2D data transmission resource offset is 2 or 3, one bit of information may be transmitted to the terminal via RRC signaling to specify the D2D data transmission resource offset of the terminal. The terminal group may be a group of terminals receiving information for specifying the same transmission resource offset through RRC signaling. Therefore, the same D2D data transmission resource can be allocated to each terminal group.

Another way to specify the D2D data transmission resource offset is to send the D2D data transmission resource offset to the terminal via the D2D SA resource.

비트의 정보가 단말을 위한 D2D 데이터 전송 자원 오프셋에 대한 정보로서 D2D SA 자원을 통해 전송될 수 있다. D2D SA 자원을 통해 전송되는 T-RPT 지시 정보에 단말을 위한 D2D 데이터 전송 자원 오프셋에 대한 정보가 포함될 수도 있다. 단말 그룹은 D2D SA 자원을 통해 동일한 전송 자원 오프셋을 특정하기 위한 정보를 수신한 단말의 집합일 수 있다. 따라서, 단말 그룹 별로 동일한 D2D 데이터 전송 자원을 할당 받을 수 있다.If the number of D2D data transmission resource offsets is N

Bit information may be transmitted via the D2D SA resource as information on the D2D data transmission resource offset for the terminal. Information on the D2D data transmission resource offset for the UE may be included in the T-RPT indication information transmitted through the D2D SA resource. The terminal group may be a set of terminals receiving information for specifying the same transmission resource offset through the D2D SA resource. Therefore, the same D2D data transmission resource can be allocated to each terminal group.

(2) The second combination

The second combination is when one D2D data transmission resource offset is defined.

1) When the switch point period (S) from the downlink to the uplink in the FDD or TDD is 5 ms

a. Set uplink / downlink in FDD or TDD 0, 1, 2, 6

- D2D data transmission resource interval = 5, D2D data transmission resource offset = 2

2) or TDD, the switch point period (S) from the downlink to the uplink is 10 ms

a. Uplink / Downlink Settings in TDD 3, 4, 5

- D2D data transmission resource interval = 10, D2D data transmission resource offset = 2

In the second combination, one D2D data transmission resource offset is used, so no separate modular operation or signaling may be performed to indicate the D2D data transmission resource offset.

6 and 7, the UE identification information for D2D communication such as information on the D2D data allocation period, cell specific information for D2D communication such as information on the D2D data transmission resource interval, information on the D2D data transmission resource offset, A method of transmitting information or terminal group specific information is disclosed.

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

6 illustrates a method in which cell-specific information for D2D communication is transmitted.

In the case of the first mode communication, the cell specific information for D2D communication may be transmitted through a system information block (SIB) For example, the SIB 600 transmitted from a base station to an coverage UE may include cell-specific information for D2D communication. Alternatively, the base station may transmit cell-specific information for D2D communication to the terminal through higher layer signaling. For example, the base station may transmit cell-specific information via RRC signaling 620 to an RRC-connected terminal.

The cell specific information for D2D communication transmitted from the base station to the terminal through the SIB 600 or the upper layer signaling 620 may include a specific channel for D2D communication (e.g., PD2DSCH (physical device to device shared channel) ) &Lt; / RTI &gt; For example, a UE in a coverage adjacent to a BS transmits PD2 DSCH 640 to an edge of a cell coverage UE of the cell, which is received from the BS through the SIB 600 or the higher layer signaling 620 . For example, the SIB 600 or higher layer signaling 620 may include SIB information broadcasted and RRC signaling set in a particular terminal.

Cell-specific information for D2D communication transmitted from the base station to the terminal via the SIB 600 or the upper layer signaling 620 may be transmitted through the D2D SA resource 660 to another terminal. For example, a terminal adjacent to a base station can transmit cell specific information received from the base station via the SIB 600 or the upper layer signaling 620 to the terminal at the cell boundary through the D2D SA resource 660. The D2D SA resource 660 may be information specific to the UE, or information transmitted through the D2D SA resource 660 may be information common to a plurality of UEs included in the UE group.

For a second mode of communication, cell specific information for D2D communication may be signaled via a D2D specific channel (e.g., PD2DSCH) For example, a terminal corresponding to an ISS may transmit cell-specific information for D2D communication via a D2D specific channel 680 to an out of coverage UE. Or cell specific information for D2D communication may be transmitted between the terminals via the D2D SA resource 690. [ The D2D SA resource 690 may be a resource specified for the UE, or the information transmitted through the D2D SA resource 690 may be information common to a plurality of UEs included in the UE group.

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

FIG. 7 shows a method of transmitting terminal-specific information or terminal-group specifying information for D2D communication.

The terminal identification information (or terminal group identification information) for D2D communication can be indicated based on the terminal identifier. For example, the terminal identifier may be assigned to the terminal based on the D2D SA resource 720 or the like. (Or terminal group specific information) for D2D communication can be determined through a rule or an expression (for example, a modular operation) predefined based on the terminal identifier assigned to the terminal.

In addition, the terminal identification information (or terminal group identification information) for D2D communication may be transmitted to the terminal through the RRC signaling 700 or the D2D SA resource 720.

Cell specific information for D2D communication and UE specific information for D2D communication may be transmitted to the terminal through various signaling methods as disclosed in FIGS.

In the case of cell specific information for D2D communication, it can be transmitted to the terminal through various signaling methods as follows.

For example, cell specific information for D2D communication may be transmitted to the UE through signaling through the SIB. In this case, the coverage coverage UE may receive signaling for the cell specific information via the SIB from the base station (eNodeB).

As another example, the cell specific information for D2D communication may be transmitted to the UE through SIB and PD2DSCH signaling. In this case, the terminal in the coverage can receive signaling for the cell specific information from the base station through the SIB. Also, a UE at the edge of cell coverage can receive signaling for cell specific information over the PD2DSCH from the D2D terminal in the coverage.

As another example, cell specific information for D2D communication may be transmitted to the UE through signaling over the PD2DSCH. In this case, the out of coverage terminal may receive signaling for the cell specific information over the PD2DSCH from the ISS or other D2D terminal outside the coverage.

As another example, cell specific information for D2D communication can be transmitted to the UE through signaling through the SIB and SA. In this case, the D2D terminal in the coverage can receive the signaling from the base station via the SIB, and the D2D terminal in the edge of cell coverage can receive the signaling via the SA from the D2D terminal in the coverage . Herein, the signaling through the SA may be configured for a dedicated signaling specific to each UE or a plurality of UEs actually included in the UE group.

In another example, the cell specific information for D2D communication may be transmitted to the UE through signaling through the SA. In this case, an out of coverage D2D terminal may receive signaling for cell specific information via the SA from another D2D terminal outside the ISS or coverage. Here, the signaling through the SA may be configured for a dedicated signaling specific to each terminal or in common to a plurality of terminals actually included in the terminal group.

As another example, the cell specific information for D2D communication may be transmitted to the UE through upper level signaling such as RRC. In this case, the RRC connected D2D terminal will be able to receive signaling for the cell specific information from the base station (eNodeB) via the RRC. Herein, the upper level signaling such as the RRC may be configured for a dedicated signaling specific to each UE or a plurality of UEs actually included in the UE group.

The terminal specific information for D2D communication can also be transmitted to the terminal through various signaling methods as follows.

For example, the terminal identification information for D2D communication can be transmitted to the terminal through the terminal identifier. Here, the terminal identifier may be a terminal identifier included in the SA. In this case, the SA receiving D2D terminal may receive the SA including the terminal identifier from the SA transmitting D2D terminal.

As another example, the UE-specific information for D2D communication may be transmitted to the UE through upper level signaling such as RRC. In this case, the RRC connected D2D terminal can receive the signaling for the UE-specific information through the RRC from the base station (eNodeB). Herein, the upper level signaling such as RRC may be configured as dedicated signaling specific to each UE.

As another example, the UE-specific information for D2D communication may be transmitted to the UE through the SA. In this case, the SA receiving D2D terminal can receive signaling for the UE specifying information through the SA from the SA transmitting D2D terminal. Here, the signaling through the SA may be configured with a dedicated signaling specific to each UE.

Meanwhile, in the case of transmitting cell specific information for D2D communication and / or UE-specific information for D2D communication to the mobile station by higher-order signaling such as RRC, the RRC idle D2D mobile station transmits a default default) value may be indicated. For example, if a D2D data transmission resource offset value of 2 or 3 can be indicated as RRC for an RRC connected D2D terminal, the RRC idle D2D terminal may be set to the D2D data transmission resource offset value The default value of 2 can be used.

Although the setting for the actual D2D terminal is the first mode communication, if there is a need for the D2D terminal set to the first mode communication to utilize the D2D resource pool for the second mode communication (e.g., When setting up a D2D resource pool (D2D receiving resource pool) for a second mode communication (such as when there is a need to point to a D2D resource pool (D2D sending resource pool and D2D receiving resource pool) for second mode communication in preparation for exceptional cases) , The following method can be considered if the base station does not indicate the information on the D2D resource pool for the second mode communication to the SIB.

First, the D2D transmission resource pool and the D2D reception resource pool of the second mode communication can be configured in advance by upper level signaling such as RRC. Alternatively, the D2D receiving resource pool of the second mode communication has the same configuration as the D2D receiving resource pool of the first mode communication, and the D2D receiving resource pool of the second mode communication is preconfigured with higher level signaling such as RRC can do. Alternatively, the D2D receiving resource pool of the second mode communication has the same configuration as the D2D receiving resource pool of the first mode communication, and the D2D transmitting resource pool of the second mode communication is the D2D receiving resource pool of the second mode communication. And the like.

Examples of combinations of various signaling methods disclosed in Figs. 6 and 7 for transmitting cell-specific information and terminal-specific information for D2D communication are described below. This is merely an example, and it will be apparent that various other combinations are possible according to the above-mentioned signaling methods.

(1) First signaling method

Cell specific information for D2D communication may be sent to the terminal via the SIB or to the terminal via the SIB and PD2DSCH. The terminal specifying information (or terminal group specifying information) for D2D communication can be determined based on the terminal identifier.

(2) Second signaling method

Cell specific information for D2D communication may be transmitted to the terminal via RRC signaling. The terminal identification information (or terminal group identification information) for D2D communication can also be transmitted to the terminal through RRC signaling.

Hereinafter, an embodiment of the present invention discloses an operation of a terminal for transmitting traffic data and a terminal for receiving traffic data when performing D2D communication in FDD or TDD.

8 is a conceptual diagram illustrating operations of a first terminal and a second terminal in an FDD according to an embodiment of the present invention.

The D2D data transmission resource can be determined based on the D2D data transmission resource determination method disclosed in Figs. The D2D data receiving resources can be determined in various ways. For example, when the first terminal and the second terminal are terminals supporting full duplex, the D2D data transmission resource and the D2D data reception resource are the same, and data transmission and reception can be performed at the same time. As another example, when the first terminal and the second terminal are half duplex terminals, the D2D data transmission resource and the D2D data reception resource may be separately set. A terminal supporting half duplex can transmit traffic data through all or some of the D2D data transmission resources among the D2D data transmission resources and receive traffic data from other terminals by monitoring the D2D data reception resources.

Hereinafter, an embodiment of the present invention will be described on the assumption that the terminal supports half duplex, and the D2D data transmission resource and the D2D data reception resource are separately set.

Assuming that the first terminal and the second terminal perform D2D communication, the first D2D data transmission resource 800 of the first terminal on the time axis may be the second D2D data receiving resource 840 of the second terminal. In other words, the second terminal may monitor the resource corresponding to the first D2D data transmission resource 800 of the first terminal as the second D2D data receiving resource 840. In order to perform the above operation, the terminal must be able to know information on D2D data transmission resources of other terminals performing D2D communication. Information on D2D data transmission resources of other terminals performing D2D communication can be transmitted to the terminal through various methods (e.g., D2D SA resource, SIB, etc.). If the terminal does not know the information about the D2D data transmission resource of the other terminal performing the D2D communication, the terminal monitors the remaining resources except for the D2D data transmission resource and can receive the traffic data from the other terminal. Hereinafter, it is assumed that the terminal knows information on D2D data transmission resources of other terminals performing D2D communication.

For example, the first D2D data transmission resource 800 of the first terminal may be allocated based on the D2D data transmission resource interval (5ms) and the D2D data transmission resource offset (2ms). The second D2D data transmission resource 820 of the second terminal may be allocated based on the D2D data transmission resource interval (5ms) and the D2D data transmission resource offset (3ms). In this case, the resource corresponding to the second D2D data transmission resource 820 may be the first D2D data receiving resource 860 of the first terminal. Also, the resource corresponding to the first D2D data transmission resource 800 may be the second D2D data receiving resource 840 of the second terminal.

The first terminal may transmit the traffic data through the selected first D2D data transmission resource among the first D2D data transmission resources. Also, the first terminal may monitor the first D2D data reception resource (the second D2D data transmission resource) and receive the traffic data transmitted from the second terminal. And the second terminal may transmit the traffic data through the selected second D2D data transmission resource among the second D2D data transmission resources. Also, the second terminal may monitor the second D2D data reception resource (first D2D data transmission resource) and receive the traffic data transmitted from the first terminal.

If a third terminal that performs D2D communication with the first terminal is added, the first D2D data reception resource of the first terminal may additionally include a third D2D data transmission resource of the third terminal. That is, the first terminal can monitor the second D2D data transmission resource of the second terminal and the third D2D data transmission resource of the third terminal as the D2D data reception resources of the first terminal.

9 is a conceptual diagram illustrating operations of a first terminal and a second terminal in TDD according to an embodiment of the present invention.

In FIG. 9, it is assumed that the first terminal and the second terminal perform TDD-based D2D communication.

The D2D data transmission resource in the TDD can be determined based on the D2D data transmission resource determination method disclosed in Figs.

For example, the D2D data transmission resource of the first terminal may be set based on the D2D data transmission resource interval (5ms) and the D2D data transmission resource offset (2ms) when the uplink / downlink setting is zero. The D2D data transmission resource of the second terminal may be set based on the D2D data transmission resource interval (5ms) and the D2D data transmission resource offset (3ms) when the uplink / downlink setting is zero.

It can be assumed that information on D2D data transmission resources of other terminals performing D2D communication is transmitted to the terminal through various methods (for example, D2D SA resource, SIB, etc.). In this case, as in the case of FDD, the resource corresponding to the second D2D data transmission resource may be the first D2D data reception resource of the first terminal. Also, the resource corresponding to the first D2D data transmission resource may be the second D2D data receiving resource of the second terminal.

The first terminal may transmit the traffic data through the selected first D2D data transmission resource among the first D2D data transmission resources. Also, the first terminal may monitor the first D2D data reception resource (the second D2D data transmission resource) and receive the traffic data transmitted from the second terminal. And the second terminal may transmit the traffic data through the selected second D2D data transmission resource among the second D2D data transmission resources. Also, the second terminal may monitor the second D2D data reception resource (first D2D data transmission resource) and receive the traffic data transmitted from the first terminal.

If a third terminal that performs D2D communication with the first terminal is added, the first D2D data reception resource of the first terminal may additionally include a third D2D data transmission resource of the third terminal. That is, the first terminal can monitor the second D2D data transmission resource of the second terminal and the third D2D data transmission resource of the third terminal as the D2D data reception resources of the first terminal.

FDD, or TDD is not transmitted to the terminal through various methods (e.g., D2D SA resource, SIB, etc.), information on the D2D data transmission resource of the other terminal performing D2D communication is transmitted to the first D2D The data receiving resource may be all or part of the resource except for the first D2D data transmission resource. For example, the first terminal may determine a first D2D data reception resource to perform monitoring in consideration of a combination of D2D data transmission resources in TDD and FDD described above.

10 is a flowchart illustrating a transmission operation of traffic data of a terminal according to an embodiment of the present invention.

Referring to FIG. 10, a UE determines a D2D data transmission resource based on cell identification information for D2D communication and UE identification information (D2D communication specific information) for D2D communication (step S1000).

For example, the UE may transmit cell-specific information (e.g., information on a D2D data allocation cycle, D2D data transmission resource interval) for D2D communication through various methods (SIB, PD2DSCH, RRC, D2D SA resource, And terminal specific information for D2D communication. The terminal specific information for D2D communication (for example, information on the D2D data transmission resource offset) may be determined based on the identifier information of the terminal without separately receiving from the outside. The D2D data transmission resource can be determined based on the D2D data transmission resource determination method disclosed in Figs.

The terminal transmits the traffic data based on the determined D2D data transmission resource (step S1020).

The terminal can transmit traffic data using all or a part of the D2D data transmission resources among the D2D data transmission resources as the selected D2D data transmission resources.

A terminal that has not acquired synchronization for D2D communication may transmit traffic data after performing synchronization based on information on a starting point of a D2D data allocation period and / or an allocation position of a current subframe on a D2D data allocation period. For example, a UE performing initial access for D2D communication may acquire information on a starting point of a D2D data allocation cycle based on a sub-frame number (SFN) and allocate D2D data transmission resources after a start point of the D2D data allocation cycle Can receive.

Alternatively, the UE performing initial access for D2D communication may acquire information on a starting point of a D2D data allocation cycle and information on an allocation position of a current subframe based on a subframe number (SFN) Subsequent D2D data transmission resources may be allocated.

11 is a flowchart illustrating a reception operation of traffic data of a terminal according to an embodiment of the present invention.

Referring to FIG. 11, the terminal determines a D2D data reception resource based on information on D2D data transmission resources of another terminal performing D2D communication (step S1100).

For example, the UE can receive information on D2D data transmission resources of other UEs through various methods (SIB, PD2DSCH, RRC, D2D SA resources, etc.) described above. Since the cell identification information of the terminal is different from that of the other terminal, the terminal can receive the terminal identification information of the other terminal (for example, information on the D2D data transmission resource offset) as information on the D2D data transmission resource of the other terminal .

The terminal receives the traffic data based on the determined D2D data reception resource (step S1120).

The terminal may monitor the determined D2D data reception resource and receive traffic data transmitted from another terminal. As in the case of transmission of traffic data, a terminal that has not acquired synchronization for D2D communication performs synchronization based on the information on the starting point of the D2D data allocation cycle and / or the allocation position of the current subframe on the D2D data allocation period, Data can be received.

12 is a block diagram illustrating a base station and a terminal according to an embodiment of the present invention.

12, the base station may include a D2D communication resource determination unit 1200, a D2D communication resource information generation unit 1210, a communication unit 1220, and a processor 1230. The terminal may include a D2D communication resource determination unit 1250, a D2D communication resource information generation unit 1260, a communication unit 1270, and a processor 1280. Each constituent unit of the terminal and the base station disclosed in FIG. 12 is an exemplary functional configuration, and one constituent unit may be implemented as a plurality of constituent units or a plurality of constituent units may be implemented as one constituent unit.

The respective units of the terminal and the base station can be implemented to perform operations of the base station and the terminal described above with reference to FIGS. For example, the configuration unit of the base station and the terminal can perform the following operations.

The D2D communication resource determination unit 1200 of the base station can be implemented to determine a D2D data transmission resource and a D2D data reception resource of a terminal for D2D communication. For example, in the case of the first mode communication, the D2D communication resource decision unit 1200 of the base station transmits D2D communication based on the same D2D data allocation period and the same D2D data transmission resource interval to a plurality of terminals included in the terminal group Resources can be determined. Also, the D2D communication resource determination unit 1200 can determine a D2D communication resource based on a different D2D data transmission resource offset for each terminal or a plurality of terminal groups included in the terminal group.

The D2D communication resource information generating unit 1210 of the base station may be configured to generate information on the D2D data transmission resource or the D2D data receiving resource determined based on the D2D communication resource determining unit 1200. [ For example, the D2D communication resource information generation unit 1210 of the base station may be implemented to generate information on the D2D data allocation period and information on the D2D data transmission resource interval as the cell identification information. Also, the D2D communication resource information generating unit 1210 of the base station may be implemented to generate information on the D2D data transmission resource offset as the terminal specifying information (or terminal group specifying information).

The communication unit 1220 of the base station can be implemented to transmit cell identification information and terminal identification information (or terminal group identification information) for D2D communication generated by the D2D communication resource information generation unit 1210 to the terminals in the coverage .

The processor 1230 of the base station can be implemented to control operations of the D2D communication resource determination unit 1200, the D2D communication resource information generation unit 1210, and the communication unit 1220.

The D2D communication resource determination unit 1250 of the terminal may be configured to determine D2D data transmission resources and D2D data reception resources of the terminal and / or other terminals. For example, in the case of the second mode communication, the terminal can determine its own D2D data transmission resource and D2D data transmission resources of other terminals based on the D2D communication resource decision unit 1250 as an ISS. For example, the D2D communication resource determination unit 1250 of the base station can determine D2D communication resources based on the same D2D data allocation period and the same D2D data transmission resource interval for a plurality of terminals included in the terminal group. Also, the D2D communication resource determination unit 1250 can determine a D2D communication resource based on a different D2D data transmission resource offset for each terminal or a plurality of terminal groups included in the terminal group.

The D2D communication resource information generation unit 1260 of the terminal can be implemented to generate information on the D2D data transmission resource or the D2D data reception resource determined based on the D2D communication resource decision unit 1200 of the terminal. For example, the D2D communication resource information generation unit 1260 of the UE can be implemented to generate information on the D2D data allocation period and information on the D2D data transmission resource interval as the cell specifying information. Also, the D2D communication resource information generating unit 1260 of the terminal can be implemented to generate information on the D2D data transmission resource offset as the terminal specifying information (or the terminal group specifying information).

The D2D communication resource determination unit 1250 of the terminal and the D2D communication resource information generation unit 1260 of the terminal may operate only when the terminal is an ISS.

The communication unit 1270 of the terminal may be implemented to transmit cell identification information and terminal identification information (or terminal group identification information) for D2D communication generated by the D2D communication resource information generation unit 1260 of the base station or the terminal to the terminal . Or if the terminal is not an ISS, the terminal may be configured to receive cell specific information and terminal specific information (or terminal group specific information) for D2D communication generated from another terminal or a base station.

The processor 1280 of the terminal can be implemented to control operations of the terminal's D2D communication resource determination unit 1250, the terminal's D2D communication resource information generation unit 1260, and the terminal's communication unit 1270.

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.

In the above-described exemplary system, the methods are described on the basis of a flowchart as a series of steps or blocks, but the present invention is not limited to the order of the steps, and some steps may occur in different orders . It will also be understood by those skilled in the art that the steps shown in the flowchart are not exclusive and that other steps may be included or that one or more steps in the flowchart may be deleted without affecting the scope of the invention.

Claims (2)

A method for determining a D2D data transmission resource in a device to device (D2D) communication,
The terminal receiving cell specific information and terminal specific information; And
Determining the set of allocated unit D2D data transmission resources as the D2D data transmission resource with the D2D data transmission resource interval on the time resource after the D2D data transmission resource offset among the time resources in the D2D data allocation period of the UE, ,
Wherein the cell identification information includes information on the D2D data allocation period and information on the D2D data transmission resource interval,
Wherein the UE-specific information includes information on the D2D data transmission resource offset. A terminal for determining a D2D data transmission resource in a D2D (device to device) communication,
A communication unit implemented to transmit and receive a wireless signal; And
And a processor selectively connected to the communication unit,
The processor receives cell specific information and terminal specific information,
A set of D2D data transmission resources allocated with a D2D data transmission resource interval on a time resource after a D2D data transmission resource offset among the time resources in the D2D data allocation period is determined as the D2D data transmission resource,
Wherein the cell identification information includes information on the D2D data allocation period and information on the D2D data transmission resource interval,
Wherein the UE identification information includes information on the D2D data transmission resource offset.

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