KR20180050070A - Method and apparatus for determining resource pool based on type of user equipment in v2x - Google Patents

Abstract

A method and apparatus for determining a resource pool for V2X are disclosed. According to an embodiment of the present invention, a method for determining a resource pool for V2X comprises a step of determining a type of a terminal; a step of determining subframe sub-pool candidates based on the type of the terminal; and a step of determining a subframe sub-pool based on a bitmap among the subframe sub-pool candidates.

Description

METHOD AND APPARATUS FOR DETERMINING RESOURCE POOL BASED ON TYPE OF USER EQUIPMENT IN V2X BACKGROUND OF THE INVENTION [0001]

The present invention relates to a wireless communication system, and more particularly to a method and apparatus for determining a resource pool based on a terminal type in V2X.

Vehicle-to-X (V2X) communication refers to a communication system that exchanges information such as traffic conditions while communicating with road infrastructure and other vehicles during operation. V2X is a vehicle-to-vehicle (V2V), which refers to communication between vehicles, a vehicle-to-pedestrian (V2P), which refers to communication between terminals carried by the vehicle and an individual, a roadside unit / Vehicle-to-infrastructure / network (V2I / N), which refers to the communication between a network and a network. In this case, the roadside unit (RSU) may be a transportation infrastructure entity implemented by a base station or a fixed terminal. For example, it may be an independent entity that transmits speed notifications to the vehicle.

In V2X communication, it is necessary to transmit control information such as Scheduling Assignment (SA) from a transmitting terminal to a receiving terminal, and data can be transmitted and received based on such control information. A set of control information for V2X and a candidate of a resource used for data transmission can be defined and is called a resource pool. In addition, resource pools for V2X communication can be defined in the time domain and the frequency domain. Of these, the time domain resource pool for V2X communication can be defined in units of subframes. However, a concrete method of determining the resource pool based on the type of the terminal having different characteristics has not yet been determined.

The present invention provides a method and apparatus for determining a resource pool based on a type of a terminal for V2X communication.

SUMMARY OF THE INVENTION The present invention provides a method and apparatus for determining a subframe pool based on a terminal type for V2X communication.

The present invention provides a method and apparatus for determining resource pools for V-UE (Vehicle-User Equipment) and / or P-UE (Pedestrian User Equipment) for V2X communication.

The present invention provides a method and apparatus for determining resource pools supporting terminal types such as full sensing, partial sensing, and random resource selection for V2X communication. .

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

A method for determining a resource pool of a terminal for V2X according to an aspect of the present invention includes: determining a type of the terminal; Determining sub-frame sub-pool candidates based on the terminal type; And determining a subframe sub-pool based on the bitmap among the subframe sub-pool candidates.

The features briefly summarized above for the present invention are only illustrative aspects of the detailed description of the invention which are described below and do not limit the scope of the invention.

According to the present invention, a method and apparatus for determining a resource pool based on a type of a terminal for V2X communication can be provided.

According to the present invention, a method and apparatus for determining a subframe pool based on a terminal type for V2X communication can be provided.

According to the present invention, a method and apparatus for determining resource pools for V-UE (Vehicle-User Equipment) and / or P-UE (Pedestrian User Equipment) for V2X communication can be provided.

According to the present invention, a method and apparatus for determining resource pools supporting terminal types such as full sensing, partial sensing, and random resource selection for V2X communication can be provided .

According to the present invention, a method and apparatus for reducing collision and increasing resource utilization efficiency can be provided by providing a V2X resource pool for different types of terminals.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention, illustrate various embodiments of the invention and, together with the description, serve to explain the principles of the invention.
1, 2 and 3 are views for explaining a V2X scenario related to the present invention.
4 and 5 are diagrams illustrating examples of resource pools in terms of time axes according to the present invention.
6 is a diagram showing an example of a resource pool in terms of a frequency axis according to the present invention.
7 is a diagram for explaining the determination of the SA and the data transmission subframe in the terminal autonomous resource selection mode according to the present invention.
8 is a view for explaining DCI and SCI in the BS resource scheduling mode according to the present invention.
9 is a view for explaining SCI in a terminal autonomous resource selection mode according to the present invention.
10 is a diagram for explaining the configuration of a subframe pool within a predetermined period according to the present invention.
11 is a view for explaining an example of a resource selection and a subframe pool configuration of the entire sensing based terminal.
12 is a view for explaining an example of a resource selection method of a partial sensing based terminal.
13 is a view for explaining an example of a resource selection method of a random resource selection based terminal.
FIG. 14 is a diagram showing an example of a subframe pool construction method according to the present invention.
15 is a diagram showing another example of a subframe pool configuration method according to the present invention.
FIG. 16 is a flowchart illustrating a resource selection and resource pool determination method based on a terminal type according to the present invention.
17 is a diagram for explaining a configuration of a wireless device according to the present invention.

Hereinafter, the contents related to the present invention will be described in detail with reference to exemplary drawings and embodiments, together with the contents of the present invention. 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.

In the present disclosure, the terms first, second, etc. are used only for the purpose of distinguishing one element from another, and do not limit the order or importance of elements, etc. unless specifically stated otherwise. Thus, within the scope of this disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly a second component in one embodiment may be referred to as a first component .

In addition, the present invention will be described with respect to a wireless communication network. The work performed in the wireless communication network may be performed in a process of controlling a network and transmitting data by a system (e.g., a base station) Work can be done at a terminal connected to the network.

That is, it is apparent that various operations performed for communication with a terminal in a network composed of a plurality of network nodes including a base station can be performed by a network node other than the base station or the base station. A 'base station (BS)' may be replaced by a term such as a fixed station, a Node B, an eNodeB (eNB), an access point (AP) In addition, 'terminal' may be replaced with terms such as User Equipment (UE), Mobile Station (MS), Mobile Subscriber Station (MSS), Subscriber Station (SS) .

The terms used mainly as abbreviations used in the present invention are defined as follows.

D2D: Device to Device (communication)

ProSe: (Device to Device) Proximity Services

SL: Sidelink

SCI: Sidelink Control Information

PSSCH: Physical Sidelink Shared Channel

PSBCH: Physical Sidelink Broadcast Channel

PSCCH: Physical Sidelink Control Channel

PSDCH: Physical Sidelink Discovery Channel

SLSS: Sidelink Synchronization Signal (= D2DSS (D2D Synchronization Signal))

SA: Scheduling assignment

TB: Transport Block

TTI: Transmission Time Interval

RB: Resource Block

V2V: Vehicle to Vehicle

V2P: Vehicle to Pedestrian

V2I / N: Vehicle to Infrastructure / Network

P-UE: Pedestrian-User Equipment

V-UE: Vehicle-User Equipment

The control information transmitted from the terminal to the other terminal in the V2X communication can be referred to as SA. When a sidelink (SL) is used as a communication link between terminals, the control information may be referred to as SCI. At this time, the control information can be transmitted through the PSCCH.

In the V2X communication, the data transmitted from the terminal to the other terminal may be configured in TB units. At this time, the data can be transmitted through the PSSCH.

Further, in the present disclosure, an operation mode is defined according to control information for V2X communication or direct link (e.g., D2D, ProSe, or SL) communication, and resource allocation scheme for data transmission.

The eNodeB resource scheduling mode is a mode in which a base station (eNodeB) or a relay node schedules resources used by the UE to transmit V2X (or direct link) control information and / or data, Or a mode in which the terminal transmits the V2X (or direct link) control information and / or data. For example, a base station or a relay node may transmit V2X (or direct link) control information and / or scheduling information on resources to be used for data transmission through V2X (or a direct link) through downlink control information (DCI) To the transmitting terminal. Accordingly, the V2X (or direct link) transmission terminal transmits V2X (or direct link) control information and data to the V2X (or direct link) V2X (or direct link) data based on the control information.

Meanwhile, in the UE autonomous resource selection mode, the UE itself selects resources used by the UE to transmit the control information and data, and the resource selection is performed in a resource pool (i.e., resource Means a mode in which a terminal determines by sensing or the like in a set of candidates, and the terminal transmits the control information and data accordingly. For example, a V2X (or direct link) transmission terminal transmits V2X (or direct link) control information and data to a V2X (or direct link) reception terminal on a resource selected by itself, and a V2X V2X (or direct link) data based on the V2X (or direct link) control information.

For example, the base station resource scheduling mode may be referred to as Mode 1 in direct link communication and Mode 3 in V2X communication. The terminal autonomous resource selection mode can be referred to as Mode 2 (Mode 2) in direct link communication and Mode 4 (Mode 4) in V2X communication.

Embodiments of the present invention will be described below by taking V2X communication as an example. However, the scope of the present invention is not limited to V2X communication, and embodiments of the present invention are applied to direct link-based communication such as D2D, ProSe, .

V2X is a term collectively referred to as V2V, V2P, and V2I / N, and each of V2V, V2P, and V2I / N can be defined in connection with LTE communication as shown in Table 1 below.

V2V - covering LTE-based communication between vehicles V2P - covering LTE-based communication between a vehicle and a device (eg handheld terminal carried by a pedestrian, cyclist, driver or passenger) V2I / N - covering LTE-based communication between a vehicle and a roadside unit / network
- A roadside unit (RSU) is a stationary infrastructure supporting V2X applications that can exchange messages with other entities supporting V2X applications.
- Note: RSU is a term frequently used in existing ITS specifications, and for the reason of introducing the term in the 3GPP specifications is to make the documents easier to read the ITS industry. RSU is a logical entity that combines V2X application logic with the functionality of an eNB (referred to as eNB-type RSU) or referred to as UE-type RSU.

V2X communication may include PC5 based communication, which is a D2D communication link (i.e., a direct interface between two devices that support ProSe). For V2X operation, various scenarios such as the following Tables 2, 3, and 4 are considered with reference to FIG. 1, FIG. 2, and FIG.

1, 2 and 3 are views for explaining a V2X scenario related to the present invention.

Table 2 and Figure 1 illustrate scenarios that support V2X operation based only on the PC5 interface (or SL). 1 (a) shows a V2V operation, (b) shows a V2I operation, and FIG. 1 (c) shows a V2P operation.

- This scenario supports V2X operation only based on PC5.
- In this scenario, a UE sends a V2X message to multiple UEs at a local area in sidelink.
- For V2I, either transmitter UE or receiver UE (s) are UE-type RSU.
- For V2P, either transmitter UE or receiver UE (s) are pedestrian UEs.

Table 3 and Figure 2 illustrate scenarios that support V2X operation based only on the Uu interface (i.e., the interface between the UE and the eNodeB). 2 (a) shows the V2V operation, (b) shows the V2I operation, and FIG. 2 (c) shows the V2P operation.

- This scenario supports V2X operation only based on Uu.
- In this scenario,
For V2V and V2P, a UE transmits a V2X message to E-UTRAN in uplink and E-UTRAN.
For V2I, when receiver is eNB type RSU, a UE transmits a V2I message to E-UTRAN (eNB type RSU) in uplink; when transmitter is eNB type RSU, E-UTRAN (eNB type RSU) transmits an I2V message to multiple UEs at a local area in downlink.
- For V2P, either transmitter UE or receiver UE (s) are pedestrian UEs.
- To support this scenario, E-UTRAN performs uplink and downlink transmission of V2X messages. For downlink, E-UTRAN may use a broadcast mechanism.

Table 4 and Figure 3 illustrate scenarios that support V2X operation using both the Uu interface and the PC5 interface (or SL). FIG. 3 (a) shows Scenario 3A in Table 4, and FIG. 3 (b) shows Scenario 3B in Table 4.

- This scenario supports V2V operation using both UU and PC5. Scenario
3A - In this scenario, a UE sends a V2X message to other UEs in sidelink. One of the receiving UEs is a UE type RSU which receives the V2X message in the sidelink and transmits it to the E-UTRAN in uplink. E-UTRAN receives the V2X message from the UE type RSU and then transmits it to multiple UEs at a local area in the downlink.
- To support this scenario, E-UTRAN performs uplink and downlink transmission of V2X messages. For downlink, E-UTRAN may use a broadcast mechanism. Scenario
3B - In this scenario, a UE sends a V2X message to E-UTRAN in uplink and E-UTRAN it to one or more UE type RSUs. Then, the UE type RSU transmits the V2X message to the UEs in the sidelink.
- To support this scenario, E-UTRAN performs uplink and downlink transmission of V2X messages. For downlink, E-UTRAN may use a broadcast mechanism.

4 to 6, in the V2X according to the present invention, an SA pool (SA pool) for a control channel (PSCCH) to which SA (Scheduling Assignment) is transmitted, a data pool (PSSCH) A configuration of a data pool will be described.

4 to 6, in the V2X according to the present invention, an SA pool (SA pool) for a control channel (PSCCH) to which SA (Scheduling Assignment) is transmitted, a data pool (PSSCH) A configuration of a data pool will be described.

Here, the SA pool may be a set of available resource candidates for transmission of the SA, and the data pool may be a set of available resource candidates for data transmission. That is, the SA pool is a resource pool for SA, and the data pool is a resource pool for data. Each resource pool may be referred to as a subframe pool in terms of time-domain. In terms of frequency-domain, a resource pool pool block pool.

Also, in V2X, the resource pool may be determined differently (or independently) depending on the type of UE. For example, in V2X, a resource pool for a V-UE and a resource pool for a P-UE can be distinguished. Alternatively, in V2X, the terminal type can be determined depending on whether the terminal supports full sensing, partial sensing, or random resource selection, and the resource type for the terminal of the first type 2 < / RTI > type of terminal.

Hereinafter, it is assumed that the resource pool to be described with reference to FIG. 4 to FIG. 6 is a resource pool for V-UE in V2X. However, the scope of the present invention is not limited thereto, and a resource pool to be described with reference to FIGS. 4 to 6 may be applied to any type of terminal.

In this case, the SA pool and the data pool, which will be described with reference to FIGS. 4 to 6, may be defined in a UE autonomous resource selection mode (mode 4).

In the base station resource scheduling mode (eNodeB resource scheduling mode or mode 3), all the side link subframes (i.e., all uplink subframes in LTE) and the V2X carriers resources corresponding to all resource blocks in a carrier or a band or a carrier or a component in a carrier aggregation are transmitted by SA and / Lt; / RTI > may be a collection of available resource candidates for < RTI ID = 0.0 > The SA pool and the data pool are separately defined in the same manner as the UE autonomous resource selection mode or mode 4 in the base station resource scheduling mode or the eNodeB resource scheduling mode or mode 3, Or a set of available resource candidates for transmission of data.

That is, the SA pool and the data pool described below with reference to FIG. 4 to FIG. 6 may include a UE autonomous resource selection mode or mode 4 and / or an eNodeB resource scheduling mode, Or mode 3).

4 to 6, the D2D Frame Number (DFN) period is an example, and the same number of subframe aggregates having a starting point equal to or different from a System Frame Number (SFN) . For example, one SFN period or DFN period may correspond to 10240 subframes corresponding to 10240 ms.

4 and 5 are diagrams illustrating examples of resource pools in terms of time axes according to the present invention.

4 shows a subframe in which a resource pool is configured on the time-domain with respect to the SA pool and the data pool. As shown in FIG. 4, the subframes for the SA pool and the data pool for V2X are defined and indicated by a repeated bitmap (for example, 1100111011 in FIG. 4) for all subframes except for specific subframes There is a number. For example, a value of 1 in the bitmap indicates the subframe for the SA pool and the data pool, and a value of 0 indicates the subframe not belonging to the SA pool and the data pool. The subframes for the SA pool for V2X and the data pool may be subframes that are allowed to transmit and / or receive data and / or data for the resource pool in V2X.

Here, all subframes except for specific subframes are subframes of subframes (for example, subframes in which V2X or direct link transmission is not allowed, V2X or V2X) among all subframes belonging to the SFN or DFN period Frames that are used for other purposes other than control information and / or data transmission in direct link transmission). For example, the particular subframes may be subframes used for transmission of SLID (Sidelink Synchronization Signal) and / or DL subframes or special subframes in Time Division Duplex (TDD) (UL subframe in TDD can be used as a side link (SL) subframe), but the present invention is not limited thereto.

In addition, the bitmap repeatedly applied may be indicated by higher layer signaling such as RRC (Radio Resource Control), and the length may be 16, 20, or 100, but is not limited thereto. For example, the "subframe indication of resource pool" information indicating the subframe indication of the resource pool shown in FIG. 4 may correspond to an example of a field included in the upper-layer signaling.

In FIG. 4, considering that SA and Data are transmitted in the same subframe in V2X, the SA pool for V2X and the subframe for data pool share the same subframes, and the subframe indication of resource pool "Shows an example assuming that the signaling field is commonly set for the SA pool and the data pool.

On the other hand, when V2X allows SA and Data to be transmitted in different subframes (i.e., SA and Data are not necessarily transmitted in different subframes, but SA and Data may be transmitted in the same subframe, The subframe for the SA pool and the data pool for V2X may be different subframes. For this purpose, the "subframe indication of resource pool" signaling field shown in FIG. As shown in FIG. 5, it may be set separately for the SA pool and the data pool.

6 is a diagram showing an example of a resource pool in terms of a frequency axis according to the present invention.

In the example of FIG. 6, the resource pool in the frequency axis side when SA and Data are transmitted in the same subframe will be described.

FIG. 6 shows a subframe in which a resource pool is configured on the frequency-domain with respect to the SA pool and the data pool. As shown in FIG. 6, the PSCCH transmitted in the SA pool and the PSSCH transmitted in the data pool are not adjacent to each other (PSCCH / PSSCH) The configuration may vary depending on the state. At this time, whether or not the PSCCH and the PSSCH are adjacent to each other may be indicated by, for example, a high-level signaling such as an RRC in a "Adjacency of PSCCH and PSSCH RBs" signaling field.

First, the case where the PSCCH transmitted in the SA pool and the PSSCH transmitted in the data pool are adjacent to each other on the frequency axis will be described.

As shown in FIG. 4, in a subframe in which a resource pool is configured on the time-domain for V2X, one RB # (N ^UL _RB -1) for all RBs (RB # 0 to N ^UL _RB -1) on the frequency axis (Starting RB of sub-channels) corresponding to the starting RB of sub-channels in RB units (or granularity), where N ^UL _RB is the total number of RBs corresponding to the system bandwidth for the UL band, The "Starting RB of sub-channels" signaling field may be indicated by higher-level signaling such as RRC, etc. This "Starting RB of sub-channels" channel RBs belonging to a total of K sub-channels belong to the data pool. At this time, the number of RBs constituting one sub-channel corresponds to the sub-channel size To the "Sub-channel size" signaling field And the number of the K sub-channels may be indicated by a "Number of sub-channels" signaling field, and may be included in upper level signaling such as RRC.

Here, RBs having the lowest RB index in each sub-channel belong to the SA pool as well as the data pool, and one or more of them may be used for PSCCH transmission. For example, an SA may be transmitted in an RB having the lowest index among RBs belonging to the entire data pool.

Next, a case where the PSCCH transmitted in the SA pool and the PSSCH transmitted in the data pool are not adjacent to each other on the frequency axis will be described.

As shown in FIG. 4, in a subframe in which a resource pool is configured on the time-domain for V2X, one RB # (N ^UL _RB -1) for all RBs (RB # 0 to N ^UL _RB -1) on the frequency axis (Starting RB of sub-channels) corresponding to the starting RB of sub-channels in RB units (or granularity), where N ^UL _RB is the total number of RBs corresponding to the system bandwidth for the UL band, The "Starting RB of sub-channels" signaling field may be indicated by higher-level signaling such as RRC, etc. This "Starting RB of sub-channels" channel RBs belonging to a total of K sub-channels belong to the data pool. At this time, the number of RBs constituting one sub-channel corresponds to the sub-channel size To the "Sub-channel size" signaling field And the number of the K sub-channels may be indicated by a "Number of sub-channels" signaling field, and may be included in upper level signaling such as RRC.

On the other hand, in a subframe in which a resource pool is configured on the time-domain for V2X as shown in FIG. 4, all the RBs (RB # 0 to RB # (N ^UL _RB -1) on the frequency axis A starting RB of PSCCH pool corresponding to the starting RB of the SA pool may be defined in one RB unit (or granularity), where N ^UL _RB is the total number of RBs corresponding to the system bandwidth for the ^UL pool, The " Starting RB of PSCCH pool "signaling field may be indicated by higher-level signaling such as RRC, etc. This" Starting RB of PSCCH pool " A total of K consecutive RBs belong to the SA pool, where K is equal to the number K of sub-channels in the data pool.

In the present invention, the subframe in which the SA is transmitted may be determined as follows.

A subframe in which an SA is transmitted in a base station resource scheduling mode (mode 3) may be configured such that a base station (eNodeB) receives the downlink control information after 4 ms (or after four subframes) from a subframe transmitting DCI Is the first subframe included in the set of resource candidates that can be used for V2X on a V2X carrier (or band) among the subframes. When SA and Data are transmitted on the same subframe, the subframe in which the SA is transmitted may be a subframe in which data is transmitted.

Meanwhile, in the UE autonomous resource selection mode (mode 4), the UE itself can determine a subframe to be transmitted by sensing in the SA pool. When SA and Data are transmitted on the same subframe, the subframe in which the SA is transmitted may be a subframe in which data is transmitted.

7 is a diagram for explaining the determination of SA and Data transmission subframes in a UE autonomous resource selection mode (mode 4) according to the present invention.

7 shows an example of selecting a subframe for transmitting a control channel and a data channel by sensing in a data pool for an SA pool for a control channel (PSCCH) and a data channel (PSSCH) associated therewith .

Here, the number of subframes corresponding to the size of the sensing window may be determined based on the specific subframes (for example, the subframe in which the SLSS resource is set Frame, a TDD DL subframe or a special subframe, and / or a bitmap incomplete subframe (to be described later in detail)).

When data is generated (for example, data is transmitted from a higher layer to a lower layer (for example, the PHY layer) (at this time, the data is transmitted from the lower layer to the lower layer (In the example of FIG. 7, "TTI m")), the sensing result for a predetermined period before the MAC PDU is considered in consideration of the MAC PDU unit from the viewpoint of the upper layer and TB unit from the lower layer A resource for transmission of a control channel and a data channel can be selected by deducing a time resource having a low possibility that another terminal occupies the channel. That is, TTI m can be regarded as a reference point of resource selection / reselection of the UE.

For example, the terminal can grasp the resources occupied and used by other terminals through sensing on a sensing window corresponding to a section from "TTI m-a" to "TTI m-b". The UE can perform transmission of the control channel and the data channel on the resource selected from the remaining resources except for the resources occupied and used by the other UE among the resources belonging to the resource pool.

Here, the values of a and b may be set (for example, a = b + 1000, b = 1) such that a section corresponding to one DFN period preceding the TTI m is a sensing window, But is not limited thereto.

Next, "TTI m + c" corresponds to a TTI that transmits SA # 1 (first SA) or a subframe that transmits SA # 1 (first SA when one TTI corresponds to one subframe) can do. "TTI m + d" is a TTI for initial transmission of TB # 1 (first TB) instructed and transmitted by SA # 1 (first SA) (or when one TTI corresponds to one subframe Frame # 1 (first TB) is transmitted first). "TTI m + e" is a TTI for retransmitting TB # 1 (first TB) indicated by SA # 1 (first SA) (or TB # 1 < / RTI > (first TB)).

In the case of FIG. 7, since it is considered that SA and Data are transmitted in the same subframe in V2X, c = d.

"TTI m + c '" may correspond to a TTI that transmits SA # 2 (second SA) (or a subframe that transmits SA # 2 (second SA) when one TTI corresponds to one subframe) have. "TTI m + d '" is a TTI for initial transmission of TB # 2 (second TB) instructed and transmitted by SA # 2 (second SA) (or one TTI corresponds to one subframe (Sub-frame for first transmission of TB # 2 (second TB)). "TTI m + e '" is a TTI for retransmitting TB # 2 (second TB) instructed and transmitted by SA # 2 (second SA) (or, when one TTI corresponds to one subframe, TB Frame # 2 (second sub-frame).

In the case of FIG. 7, since it is considered that SA and Data are transmitted in the same subframe in V2X, c '= d'.

At this time, d '= d + P _rsvp * j. That is, the initial transmission point of TB # 2 can be reserved at a point in time after _Prsvp * j from the initial transmission point of TB # 1. For example, P _rsvp = 100, and j is a network configuration or carrier-by-carrier for each carrier (or band) used for V2X in the range {0,1, ..., specific network configuration or pre-configuration, and may be signaled with one of the selected values. For example, the value of j may be selected and indicated via the "Resource reservation" signaling field (filed) of the SCI included in the SA. At this time, j = 0 indicates that there is no d 'value, that is, resource reservation after TTI corresponding to "P _rsvp * j" from "TTI m + d" It can mean not.

Although the example of FIG. 7 has been described on the assumption of the UE autonomous resource selection mode (mode 4), the description of the relationship of the TTIs after "TTI m" excluding the sensing window in FIG. Mode (eNodeB resource scheduling mode, or mode 3). In other words, except for the sensing window in the example of Fig. 7, "TTI m + c" indicates that the base station (eNodeB) receives the sub- frame after 4 ms (or after 4 subframes) May correspond to the first subframe included in the set of resource candidates that may be used for V2X on a V2X carrier (carrier, or band) among the frames.

8 is a view for explaining DCI and SCI in the BS resource scheduling mode according to the present invention.

As described above, in the base station resource scheduling mode (eNodeB resource scheduling mode or mode 3), the subframe in which the SA is transmitted is 4 ms after the subframe in which the base station (eNodeB) transmits DCI (Downlink Control Information) Frame) is the first subframe included in the set of resource candidates that can be used for V2X on a V2X carrier (carrier or band).

At this time, the information necessary for the V2X (or direct link) transmission terminal (UE A in FIG. 8) to transmit the SA and Data to the V2X (or direct link) reception terminal (UE B in FIG. 8) Through the DCI. For example, the DCI may include information as shown in Table 5.

DCI for V2X
- CIF: 3 bits
- Lowest index of sub-channel allocation: ceil (log2 (K)): 0 to 5 bits
- SA contents
- Time gap between transmission and retransmission: 4 bits
- Frequency resource of initial and last transmission
: ceil (log2 (K * (K + 1) / 2) = 0 to 8 bits

Information on a resource block, which is a frequency axis resource used by the UE A in transmitting the SA to the UE B in the subframe in which the SA is transmitted, is represented by "CIF" And a "Lowest index of sub-channel allocation" signaling field corresponding to the lowest index of the sub-channel assignment.

In the base station resource scheduling mode (eNodeB resource scheduling mode or mode 3), the DCI includes control information (SA (Scheduling Assignment)) for data transmission from the UE A to the UE B, (content). At this time, the content related to the SCI indicated by the DCI includes a time gap between transmission and retransmission corresponding to a time gap between the transmission and the retransmission, as shown in Table 5, A "frequency resource of initial and last transmission" signaling field indicating the frequency resource of the transmission.

Also, in various examples of the present invention, "Time gap between transmission and retransmission" and / or "Frequency resource of initial and last transmission" is merely an example, and the scope of the present invention is not limited by its name. For example, the information indicated by "Time gap between transmission and retransmission" and / or "Frequency resource of initial and last transmission" In the present invention, the "time gap between transmission and retransmission" field is referred to as a first field, and the "frequency resource of initial and last transmission" field is referred to as a second field.

9 is a view for explaining SCI in a terminal autonomous resource selection mode according to the present invention.

In the UE autonomous resource selection mode (mode 4), the UE can determine the subframe to be transmitted by itself in the SA pool (specifically, the subframe pool for the SA) by sensing. A resource block, which is a frequency axis resource used for transmitting an SA in a subframe in which the SA is transmitted, can also determine itself in an SA pool (specifically, a resource block pool for an SA). Therefore, unlike the base station resource scheduling mode (eNodeB resource scheduling mode or mode 3), the CIF and the Lowest index of sub-channel allocation signaling fields are not received from the base station via the DCI, You can decide.

In the UE autonomous resource selection mode or mode 4, content related to SCI (Sidelink Control Information) is transmitted as information (SA (Scheduling Assignment)) necessary for the UE to transmit data in V2X communication. The terminal itself is also determined. Therefore, unlike the base station resource scheduling mode (eNodeB resource scheduling mode or mode 3), a first field (e.g., "Time gap between transmission and retransmission") and a second field and last transmission ") from the base station through the DCI.

That is, the SCI (Sidelink Control Information) corresponding to the information (SA (Scheduling Assignment)) required for the UE to transmit data is transmitted in the base station resource scheduling mode (eNodeB resource scheduling mode or mode 3) , And the terminal autonomous resource selection mode (mode 4) is determined by the terminal itself.

Meanwhile, both the UE resource scheduling mode (eNodeB resource scheduling mode or mode 3) and the UE autonomous resource selection mode (mode 4) (SC) corresponding to control information (Scheduling Assignment) is required to decode the data transmitted from the UE A and the UE A transmitting the data transmits the control information SA (Scheduling Assignment) To the UE (UE B) receiving the data. For example, the SCI may include information as shown in Table 6 below.

SCI for V2X
- Priority: 3 bits
- Resource reservation: 4 bits
- MCS: 5 bits
- CRC: 16 bits
- Retransmission index: 1 bit
- Time gap between transmission and retransmission: 4 bits
- Frequency resource of initial and last transmission: 8 bits
- Reserved bits: 7 bits

Hereinafter, exemplary information included in the DCI of Table 5 and the SCI of Table 6 will be described in detail.

As described above, information on a resource block, which is a frequency axis resource used for SA transmission in a base station resource scheduling mode (mode 3), can be indicated in the DCI, CIF " and "Lowest index of sub-channel allocation" signaling fields in Table 5.

The "CIF" signaling field may have a size of 3 bits and indicates a carrier (carrier, or band) used for V2X. For example, if up to five carriers can be set for the UE, the indicator for distinguishing each carrier is 3 bits (i.e. ceil (log2 (5)) = 3, where ceil (x) Or the like), and the indicator can be used to indicate which of the five carriers is used for SA transmission.

The "lowest index of sub-channel allocation" signaling field is used to transmit a resource block on a carrier (carrier or band) used for the V2X in the subframe transmitting the SA, For example.

The "lowest index of sub-channel allocation" signaling field is used for transmission of data associated with the SA among a total of K sub-channels having indexes from 0 to K-1. The sub-channel having the lowest index among the sub-channels to be sub-channelized. This requires a bit of ceil (log2 (K)). The value of K is variable depending on the size of the system bandwidth, and may have a value of, for example, a maximum of 20. Accordingly, a minimum of 0 bits and a maximum of 5 bits are required for the "Lowest index of sub-channel allocation" field.

For example, there are a total of six sub-channels having an index value of 0 to an index value of 5, and a total of four sub-channels corresponding to an index value of 5 from the index values of 2, ), The value indicated by the "Lowest index of sub-channel allocation" may be an index value of 2. If the PSSCH is allocated to the PSSCH and the PSSCH is used for transmission of the data associated with the SA, (6)) = 3 bits are required.

In this case, the PSCCH for transmitting the SA includes a sub-channel indicated by the "Lowest index of sub-channel allocation " when the PSCCH for transmitting the SA and the PSSCH for transmitting data are adjacent to each other on the frequency axis. channel (see the left drawing of FIG. 6). Alternatively, when the PSCCH for transmitting the SA and the PSSCH for transmitting data are not adjacent to each other on the frequency axis, a one-to-one correspondence to a sub-channel indicated by the "Lowest index of sub- (See the right drawing in Fig. 6).

Assume, for example, that the value indicated by the "Lowest index of sub-channel allocation" In this case, if the PSCCH for transmitting the SA and the PSSCH for transmitting data are adjacent to each other on the frequency axis, an RB having the lowest RB index in a sub-channel corresponding to the index value 2 6, if the RB index corresponding to "Starting RB of sub-channels " is r, a PSCCH for transmitting SAs is allocated to the RB corresponding to r + 2 *" sub-channel size " . Alternatively, if the PSCCH for transmitting the SA and the PSSCH for transmitting the data are not adjacent to each other on the frequency axis, an RB corresponding to a sub-channel corresponding to the index value 2 in a one-to- For example, if the RB index corresponding to "Starting RB of PSCCH pool" is s in the right drawing of FIG. 6, a PSCCH for transmitting an SA to an RB corresponding to s + 2 may be allocated.

Next, a first field (e.g., "Time gap between transmission and retransmission") for indicating a resource used for PSSCH for transmitting data among SA contents of Table 5, a second field (E. G., &Quot; frequency resource of initial and last transmission ") may be included in the DCI in a base station resource scheduling mode (mode 3). The second field (e.g., "Frequency resource of initial transmission and last transmission") in Table 6 indicates a base station resource scheduling mode (eNodeB resource scheduling mode, or mode 3), the value indicated through the DCI is directly included in the SCI. However, in case of the UE autonomous resource selection mode or mode 4, . ≪ / RTI >

The first field (e.g., "Time gap between transmission and retransmission") is a gap between subframes in which data of the TB unit associated with the SA is initially transmitted and subframes in which data of the TB unit associated with the SA is retransmitted, Or may indicate a gap between a subframe in which Data of TB unit associated with the SA is initially transmitted and a subframe in which the SA is retransmitted. This value may be a value from 0 to 15. If it is 0, it indicates that there is no retransmission of the TB transmitted through the SA including the SCI. If the retransmission is 1 to 15, And the first transmitted TB is retransmitted after 1 to 15 subframes each. For example, in the case of a UE autonomous resource selection mode or mode 4, the first field (e.g., "Time gap between transmission and retransmission & + d (= TTI m + c) "and a gap between the subframe corresponding to" TTI m + e "

Next, a second field (e.g., "frequency resource of initial and last transmission") indicates which RBs are transmitted on the frequency axis in the sub-frame in which data of the TB unit is first transmitted and in the sub- . In particular, the second field (e.g., "Frequency resource of initial and last transmission") indicates the number of sub-channels (the number of sub- The number of sub-channels used in the initial transmission), as well as information on the lowest index among the sub-channels used in retransmission of Data.

More specifically, when the TB transmitted through the SA including the SCI is transmitted for the first time, the lowest index among the sub-channels used for the transmission is the eNodeB resource scheduling mode , Or mode 3) is indicated by a "Lowest index of sub-channel allocation" signaling field included in DCI, and in case of UE autonomous resource selection mode or mode 4, It is decided by oneself. Herein, information indicating how many sub-channels are to be transmitted may be included in the second field (e.g., "Frequency resource of initial and last transmission").

In addition, when a TB instructed and transmitted through the SA including the SCI is retransmitted, the lowest index among the sub-channels used for the retransmission is allocated to the second field (e.g., "Frequency resource of initial < / RTI > and last transmission "). The number of sub-channels to be transmitted during the TB retransmission is indicated by the second field (e.g., "Frequency resource of initial and last transmission"), As many sub-channels as the number of used sub-channels are used.

For example, in the UE autonomous resource selection mode or mode 4, a subframe corresponding to "TTI m + d (= TTI m + c) RBs for transmitting the PSSCH in a subframe corresponding to " m + e "are indicated by a second field (e.g.," Frequency resource of initial and last transmission ").

Assuming K sub-channels for the second field (e.g., "Frequency resource of initial and last transmission"), the total ceil (log2 (K * (K + 1) / 2) For example, since K is a maximum of 20, it requires at least 0 bits to a maximum of 8 bits.

Of the other signaling fields included in the SCI of Table 6, "Priority" may indicate the priority of data of the TB unit to be transmitted.

"Resource reservation" is a parameter used to indicate a reserved resource in the UE autonomous resource selection mode or mode 4, as described above, j∈ {0, 1, 2, .. ., 10}.

"Modulation and Coding Scheme (MCS)" can indicate a modulation scheme and a coding scheme of data of TB units to be transmitted.

The "Retransmission index" indicates the retransmission of data in TB units.

A "Cyclic Redundancy Check (CRC)" may be added to the SCI for error detection and / or differentiation from other SCIs during transmission of the SCI.

Hereinafter, examples of the present invention for a resource pool for V2X communication will be described. Specifically, the UE determines a subframe pool for a base station resource scheduling mode (or a mode 3) or a terminal autonomous resource selection mode (or a mode 4) for V2X communication. In order to determine the subframe pool, Information (or setting) to be provided to the user is described below.

10 is a diagram for explaining the configuration of a subframe pool within a predetermined period according to the present invention.

In FIG. 10, a set of all subframes belonging to a predetermined period is shown first. For example, the predetermined period may be an SFN period or a DFN period (10240 ms). Since the time length of one subframe is 1 ms, a total of 10240 subframes (i.e., subframe indexes # 0 to # 10239) may be included within a predetermined period.

Subframes excluding or skipping specific subframe (s) from the entire set of subframes of the predetermined period are denoted by t ^SL _i (0?? I <Tmax). That is, the subframes corresponding to {t ^SL ₀ , t ^SL ₁ , ..., t ^SL _{Tmax -1} } are a set of subframes that may belong to the resource pool for V2X communication. In the set of subframes {t ^SL ₀ , t ^SL ₁ , ..., t ^SL _{Tmax -1} }, a radio corresponding to SFN 0 (in case of mode 3) or DFN 0 (in case of mode 4) Frames may be arranged in the order of increasing indexes of subframes based on subframe # 0 of the frame.

That is, the subframes corresponding to {t ^SL ₀ , t ^SL ₁ , ..., t ^SL _{Tmax -1} } are a set of subframes that may belong to the resource pool for V2X communication. Here, the subframes _{pertaining to} {t ^SL ₀ , t ^SL ₁ , ..., t ^SL _{Tmax - 1} } do not mean resource pools, but some or all of them may be set as resource pools.

(I.e., {t ^SL ₀ , t ^SL ₁ , ..., t ^SL _{Tmax -1} }) excluding the specific sub frame (s) from the entire set of the sub frames of the predetermined period to the resource pool Specifically, a subframe pool corresponding to a time axis in the resource pool) to which the bitmap indicating the subframe pool is applied. Here, the specific subframe (s) corresponds to, for example, a subframe in which the SLSS resource is set, a TDD DL subframe or a special subframe, and / or a bitmap incapable subframe can do.

The bitmap associated with the resource pool may be expressed as {b ₀ , b ₁ , ..., b _{Lbitmap - 1} }. Here, L _bitmap is the length of the bitmap set by the upper layer. For example, the L _bitmap may be set to a value smaller than the number of subframes belonging to the predetermined period, and the bitmap may be repeatedly applied within the predetermined period. For example, the value of the L _bitmap may be 16, 20, or 100, but is not limited thereto.

A subframe pool may be composed of subframes whose value indicated by the bitmap corresponds to one. In other words, if b _{k '} 1 (where k' = k mod L _bitmap and mod is a modular operation), t ^SL _k (where 0≤≤k <(10240-xy) The frame belongs to the subframe pool. That is, the subframe pool may be composed of subframes satisfying _{bk '} 1 of t ^SL _k when k' = k mod L _bitmap .

Here, x may correspond to the number of subframes in which the SLSS is set within the predetermined period. For example, the value of x may be zero or 64. Specifically, if the period in which the SLSS is set is 160 ms, 64 SLSS subframes may exist within a predetermined period of 10240 ms in length, so x = 64. Or, x = 0 if SLSS is not set. In the present invention, x SLSS setting subframes may be referred to as a first type excluding subframe.

Also, y may correspond to the number of bitmap non-application subframes within the predetermined period. For example, the value of y may be 0, 16, 40, or 76. Here, the bitmap non-application subframe may be determined in consideration of the length of the predetermined period, the length of the bitmap, a subframe in which V2X transmission is reserved, and the like. Specific examples of this will be described later. In the present invention, the y bitmap nonapplicable subframe may be referred to as a second type excluding subframe.

If resources in the pool in subframe t ^SL _m SA and / or the Data transfer is scheduled (or grant (grant) it is) determined as described above, from t ^SL _{m Rsvp} P * j is in subframe t _{+ m} ^SL _{Prsvp * j} after the SA and / or Data transmission can be reserved (reserve). Where, j = 1, 2, ... , and can be defined as _resel C -1, C _resel this time may be one of C = A * _resel SL_RESOURCE_RESELECTION_COUNTER associated with the resource re-selection counter.

For example, A = 6 or 10, and SL_RESOURCE_RESELECTION_COUNTER may have a value of up to 15. P _rsvp is a resource reservation interval set by the upper _layer . For example, P _rsvp may be fixedly used as a value of 100, or 100 or other values of 1 or more may be selected and used have. Hereinafter, in the present invention, P _rsvp is briefly referred to as P.

Hereinafter, a method of determining a resource pool based on a terminal type in V2X according to the present invention will be described.

Specifically, a method of determining a resource pool for a P-UE will be described on the assumption of a UE autonomous resource selection mode (mode 4).

For example, the method of determining a resource pool as described above with reference to FIG. 4 to FIG. 6 and FIG. 10 can basically be applied to a V-UE. The resource selection method as shown in FIG. 7 can be applied to a UE supporting full sensing (for example, V-UE). Meanwhile, a resource pool determination method as described below may be applied to the P-UE.

In the present invention, different resource pool determination methods may be applied depending on the detailed type of the P-UE. For example, for a P-UE selecting a resource based on partial sensing and a P-UE randomly selecting a resource without sensing based on the partial sensing, Can be applied.

Unlike V2V where V-UE is considered, energy saving is one big issue in V2P where P-UE is considered. Since the V-UE is a terminal included in the vehicle or existing in the vehicle, it is not limited by the battery, but the P-UE is a pedestrian's terminal, and battery power consumption is limited. For example, it is required to reduce energy consumption in the case of transmission from a P-UE to another entity (i.e., Pedestrian to Vehicle (P2V)).

For example, for a V-UE, a sensing-based resource selection scheme (i.e., a full-scale resource allocation scheme) for all resources within a specific interval (i.e., a period from TTI ma to TTI- Sensing method) can be applied. Here, as described above, the specific period for performing the sensing is the sub-frame set to which the bitmap is applied (i.e., the specific sub-frames among the entire sub-frames belonging to a predetermined period (e.g., SFN or DFN period) (For example, a set excluding a subframe in which the SLSS resource is set, a TDD DL subframe or a special subframe, and / or a bitmap nonapplication subframe described above) Frame) of the subframe. Therefore, assuming that the time length of one subframe is 1 ms, the length of time of the sensing period may actually be 1000 ms (= 1 s) or more.

Meanwhile, for the P-UE, a sensing-based resource selection scheme (e.g., a sub-frame selection scheme) is applied to a certain resource in a specific period (for example, 1000 subframes based on a bitmap- , A partial sensing method) can be applied.

It can also be assumed that the P-UE can transmit the side link control information and data to the V-UE, but the P-UE does not receive the side link control information and data from the V-UE. For example, a typical P-UE may have a P2V communication capability (e.g., side link transmission (Tx) capability), so that a V-UE of a vehicle, etc., And can support operations to prepare for safety issues and the like. On the other hand, the P-UE may not have V2P communication capability (for example, side link reception (Rx) capability), and this is because the P-UE such as a pedestrian, It is considered that there is no need to learn to prepare.

In the case of supporting devices having no side link Rx capability, a random resource selection scheme may be applied to the P-UE.

Therefore, the resource selection scheme for the V-UE can be applied to the entire sensing scheme as described in FIG. 7 and the like, and the resource pool scheme can be applied to the schemes illustrated in FIG. 4 to FIG. 6 and FIG.

Various examples of the present invention regarding a resource selection scheme based on a partial sensing scheme for a P-UE supporting partial sensing and a resource pool scheme for the partial sensing scheme will be described below.

Further, various examples of the present invention for a resource selection scheme based on a random resource selection scheme for a P-UE supporting random resource selection, and a resource pool scheme for this, will be described below.

As described above, for the V-UE, a resource pool can be configured in the same manner as the example of FIG. 4 to FIG. 6 and FIG. In particular, as for the subframe pool among the resource pools, the _bitmap of the length L _bitmap is repeatedly applied to the subframes except for some subframes within one SFN (or DFN) period as illustrated in FIGS. 4, 5, To indicate subframes belonging to the subframe pool. At this time, the sensing may be performed in a total of 1000 sub-frames to be subjected to bitmap application (i.e., sub-frames excluding some sub-frames within one SFN (or DFN) period). That is, it is possible to identify a resource occupied and used by another terminal through sensing on a sensing window corresponding to 1000 subframes, and to acquire resources occupied by the other terminal among resources belonging to the resource pool The control channel and the data channel can be transmitted on the resource selected from the resources other than the used resource.

A sub-frame pool for a P-UE based on partial sensing may also be based on a sub-frame pool for the V-UE based on the full sensing. This is to simplify the complexity by performing the same sensing based operation only in the size of the sensing window.

On the other hand, a sub-frame pool for a P-UE based on a random resource selection is independent of the sub-frame pool for the V-UE based on the full sensing (in this case, A sub-frame pool for-UE may be shared with a sub-frame pool for a full sensing based V-UE). In this case, since the subframe pool for the P-UE is configured independently, the performance of the P-UE can be increased compared to sharing the subframe pool mentioned below. That is, if a resource for a P-UE based on a random resource selection is a resource for a P-UE based on other resources (i.e., partial sensing) and / or a V-UE based on a full sensing And the performance can be increased because it is independently configured without being influenced by the resource for the resource.

On the other hand, a sub-frame pool for a P-UE based on a random resource selection shares a subframe pool for the V-UE based on the full sensing (at this time, Based sub-frame pool for P-UE is also shared with a sub-frame pool for full sensing based V-UE). This is to prevent the performance of V2V from being affected due to the reduction of available resources. In addition, since one pool can be shared and used, it is possible to utilize resources more efficiently without waste of resources.

At this time, a subframe pool for a P-UE based on a random resource selection and a subframe pool for a P-UE based on a partial sensing need to be distinguished from each other with orthogonality. Because P-UEs based on partial sensing can not be assured that the resources they use are not interfered by random resource selection based P-UEs.

In consideration of the foregoing, a specific resource selection scheme and a sub-frame pool scheme for a P-UE based on a random resource selection, a specific resource selection scheme for a P-UE based on a partial sensing, The frame pool configuration method will be described below.

11 is a view for explaining an example of a resource selection and a subframe pool configuration of the entire sensing based terminal.

In FIG. 11, the entire sensing-based terminal may be, for example, a V-UE, but is not limited thereto, and may perform the entire sensing-based operation in any terminal without power limitation.

As shown in FIG. 11, for example, sensing can be performed on 1000 subframes among a set of subframes to which a bitmap is to be applied. Accordingly, it is possible to grasp a resource occupied and used by another terminal through sensing on a sensing window corresponding to 1000 subframes, and to acquire resources occupied by the other terminal among resources belonging to the resource pool (For example, TTI m + c, TTI m + e, TTI m + c 'and TTI m + e' are selected) among the resources other than the resource being used Can be performed.

Here, TTI m + c and TTI m + c '(likewise TTI m + e and TTI m + e') can be spaced by TTI of P * j (where P is the same as P _rsvp described above) have. If TTI m + c and TTI m + e '(similarly TTI m + e and TTI m + e') correspond to one subframe of the set of subframes to be subjected to bitmap application, P * j And can have an interval of as many as four subframes. 11 shows an exemplary case where j = 1. For example, P = 100, but not limited thereto, j may have a value of {0, 1, ..., 10}. For example, the value of j may be indicated via the SCI included in the SA. Specifically, the value of j is the carrier (or band) used for V2X - one of the values selected by the carrier-specific network configuration or the pre-configuration Value, which may be selected and indicated via the "Resource reservation" signaling field of the SCI included in the SA.

A subframe pool for a terminal supporting full sensing can be configured as shown in FIG. 10 described above.

12 is a view for explaining an example of a resource selection method of a partial sensing based terminal.

In the example of FIG. 12, the partial sensing based terminal may be a P-UE, but not limited thereto, and may perform a partial sensing based operation even in any terminal with power limitation.

As shown in FIG. 12, sensing can be performed for a total of (1000 / P) * X subframes in the bitmap application target subframe set. A total of 1000 subframes for which sensing is performed can be divided into a predetermined duration corresponding to P subframes. At this time, P may be 100, but is not limited thereto. The sensing may be performed on X subframes within a predetermined duration corresponding to the P subframes. Here, P may be a value divided by X. For example, X = 10 may be, but is not limited thereto.

That is, a certain period corresponding to the P subframes is repeated a total of (1000 / P) times, and within a predetermined duration corresponding to each P subframes, And is divided into a total of P / X sub-durations, and sensing can be performed in one of the sub-durations.

Here, as mentioned above, P = 100 can be fixed. X may be a fixed value (e.g., 10), or it may be composed of multiple values, or may be randomly selected.

In addition, it may be set to what sub-duration of the P / X sub-durations within the predetermined duration corresponding to the P subframes is to be performed . For example, the information for setting the sub-interval at which the sensing is performed may have a fixed value or may be indicated separately. For example, in the case where X is 10, P = 100, and P / X = 10, one sub-duration of a total of 10 sub-durations may be fixedly used Or a setting of which sub-duration to use among the P / X (= 10) th sub-durations from the first may be indicated or selected randomly. In FIG. 12, for example, a fifth sub-duration is used.

Therefore, it is possible to grasp the resources occupied and used by other terminals through sensing on a sensing window corresponding to a total of (1000 / P) * X subframes, It is possible to transmit a control channel and a data channel on a resource selected from remaining resources except for resources occupied and used by the other terminal. For example, in the example of FIG. 12, TTI m + c may be selected according to the partial sensing scheme, and TTI m + e, TTI m + c ', TTI m + e' Can be additionally selected.

Therefore, resource selection of a terminal supporting partial sensing can be performed as follows.

1) may perform sensing within a sub-duration corresponding to X consecutive subframes.

Here, 1-a) X can use one fixed value among the values for which P / X is an integer value (for example, X = 10).

Alternatively, 1-b) X may be indicated by higher-level signaling such as RRC, such that one of the values for which P / X is an integer value.

or, 1-c) X may be randomly selected from among values where P / X is an integer value.

2) A subframe in which a sub-duration corresponding to X consecutive subframes starts can be determined as a subframe after an offset corresponding to X * i ₁ subframe.

Here, 2-a) i ₁ may be indicated by higher-order signaling such as RRC, such that one of {0, 1, ..., P / X-1}

Alternatively, 2-b) i ₁ can use one fixed value of {0, 1, ..., P / X-1}.

Or, 2-c) i ₁ can be randomly selected from among {0, 1, ..., P / X-1}.

3) A sub-duration corresponding to X consecutive subframes may be repeated by an integer value of 1000 / P with an interval corresponding to P subframes.

Here, 3-a) P can use one fixed value (for example, P = 100, in which case the integer value of 1000 / P can be 10).

Alternatively, 3-b) P may be indicated by higher-level signaling such as RRC, such that one of a plurality of values.

Alternatively, 3-c) P may be determined according to system conditions such as a subframe pool configuration method, or one value among a plurality of values.

A sub frame pool configuration scheme for a terminal supporting partial sensing will be described later.

13 is a view for explaining an example of a resource selection method of a random resource selection based terminal.

In the example of FIG. 13, the random resource selection based terminal may be a P-UE but is not limited thereto, and any terminal that does not support the side link Rx capability can perform a random resource selection based operation.

The example of Fig. 13 does not include a sensing window, unlike the example of Fig. 11 or Fig. That is, the terminal for random resource selection does not require sensing for resource selection.

As shown in FIG. 13, among the set of subframes to which the bitmap is applied, transmission of the control channel and data channel on a randomly selected resource in Y subframes within a predetermined duration corresponding to P subframes Can be performed. For example, in the example of FIG. 13, TTI m + c can be selected by a random resource selection scheme, and TTI m + e, TTI m + c ', TTI m + e' Can be additionally selected.

A predetermined duration corresponding to the P subframes may be periodically repeated. Here, P may be 100, but is not limited thereto. Random resource selection may be performed on Y subframes within a predetermined duration corresponding to the P subframes. Here, P may be a value divided by Y. [ Also, Y may have a value of a multiple of X described in the example of Fig. For example, Y = 10 may be, but is not limited thereto.

That is, a predetermined duration corresponding to each P subframes is divided into a total of P / Y sub-durations corresponding to Y subframes, and one of the sub- - Random resource selection can be performed in sub-duration.

Here, P = 100 may be fixed as described above. Y may be a fixed value (e.g., 10), or it may be composed of multiple values, or may be randomly selected.

In addition, it may be set how many sub-durations of P / Y sub-durations are used within a predetermined duration corresponding to P subframes. For example, the information for setting the sub-section to be used may have a fixed value or may be indicated separately. For example, in the case of Y = 10, P = 100 and P / Y = 10, one sub-duration of a total of 10 sub-durations may be fixedly used Or a sub-duration of the P / Y (= 10) th sub-duration from the first may be indicated or randomly selected. In FIG. 13, for example, a second sub-duration is used.

As another example, a predetermined duration corresponding to each P subframes is divided into a total of P / X sub-durations corresponding to X subframes, and Y A random resource selection may be performed in one or more sub-durations corresponding to a plurality of subframes (where Y is a multiple of X). In this case, it may be set which sub-duration (s) of P / X sub-durations are used within a predetermined duration corresponding to P subframes .

Therefore, resource selection of a terminal supporting random resource selection can be performed as follows.

1) perform random resource selection within the sub-duration (s) corresponding to Y consecutive subframes.

Where 1-a) Y can use one fixed value among the values that satisfy k * X (where k? {1, 2, ..., P / X-1}) (e.g., Y = 10 or Y = 20).

Alternatively, 1-b) Y may be indicated by higher-order signaling such as RRC, such that one of the values satisfying k * X (where k? {1, 2, ..., P / X-1} (I.e., the value to be signaled may be k).

Alternatively, 1-c) Y may be randomly selected from among values satisfying k * X (where k? {1, 2, ..., P / X-1}).

2) A subframe in which a sub-duration (s) corresponding to Y consecutive subframes starts may be a subframe after offset corresponding to X * i ₂ subframes.

Here, 2-a) i ₂ can be indicated by higher-level signaling such as RRC, such as {0, 1, ..., P / X-1}.

Alternatively, 2-b) i ₂ can use one fixed value of {0, 1, ..., P / X-1}.

Or, 2-c) i ₂ may be randomly selected from {0, 1, ..., P / X-1}.

3) Sub-duration (s) corresponding to Y consecutive subframes may be repeated by an integer value of 1000 / P with intervals corresponding to P subframes.

Here, 3-a) P can use one fixed value (for example, P = 100, in which case the integer value of 1000 / P can be 10).

Alternatively, 3-b) P may be indicated by higher-level signaling such as RRC, such that one of a plurality of values.

Alternatively, 3-c) P may be determined according to system conditions such as a subframe pool configuration method, or one value among a plurality of values.

A subframe pool configuration method for a terminal supporting random resource selection will be described later.

When the entire sensing-based terminal, the partial sensing-based terminal, and the terminals based on the random resource selection method coexist as described above, a subframe pool configuration scheme for supporting them is required.

In particular, in the exemplary embodiments of the present invention, the X subframes selected based on the partial sensing scheme of FIG. 12 and the Y subframes selected based on the random resource selection scheme of FIG. 13 may not overlap each other . For example, in order to prevent the X subframes and the Y subframes from overlapping with each other, the value of i _{1, which} is an element for determining an offset value related to the starting point of X subframes in FIG. 12, The value of i ₂ , which determines the offset value associated with the starting point of the frame, can be determined.

Hereinafter, a subframe pool configuration method according to the present invention will be described with reference to FIGS. 14 and 15. FIG.

FIG. 14 is a diagram showing an example of a subframe pool construction method according to the present invention.

A subframe pool for a random resource selection based terminal may be defined as sharing a subframe pool for a full sensing based terminal. Also, a subframe pool for a partial sensing based terminal may be shared with a subframe pool for a full sensing based terminal.

That is, a subframe pool for a random resource selection based terminal, a partial sensing based terminal, and a global sensing based terminal can be defined in one subframe pool as defined in FIG. 4 and FIG. Here, the subframe pool defined in FIGS. 4 and 10 is referred to as an entire subframe pool, and the subframe pool for the entire sensing-based terminal includes a part of the entire subframe pool (i.e., the first subframe sub- pool). 12, it is possible to define a sub-frame pool (i.e., a second sub-frame sub-pool) for a random resource selection based terminal in a whole sub-frame pool. Also, in consideration of the description of FIG. 13, it is possible to define a sub-frame pool (i.e., a third sub-frame sub-pool) for a partial sensing based terminal in a whole sub-frame pool.

Here, in the entire subframe pool, a first subframe sub-pool for the entire sensing terminal, a second subframe sub-pool for the partial sensing based terminal, a third subframe sub- So that the pools do not overlap with each other.

If the first, second, and third sub-frame sub-pools overlap, the use of the sub-frame can be determined according to a predetermined priority order. For example, the highest priority is the third subframe sub-pool for the random resource selection based terminal, the second highest subframe for the partial sensing based terminal is the second subframe sub- And the first subframe sub-pool for the terminal has the lowest priority. However, this is merely an example, and other priorities may be set.

Referring to FIG. 14, a set of subframes having an index {t ^SL ₀ , t ^SL ₁ , ..., t ^SL _{Tmax -1} } at the top represents candidates of the entire sub frame pool. That is, the candidates of all the sub-frame pools denoted by A in Fig. 14 may correspond to the above-described bitmap application target subframe set.

The three sub-frame sub-pool candidates at the bottom of FIG. 14 represent first sub-frame sub-pool candidates, second sub-frame sub-pool candidates, and third sub-frame sub-pool candidates, respectively. For example, the first subframe sub-pool candidates may be applied to the V-UE based on the global sensing, the second subframe sub-pool candidates may be applied to the P-UE based on the partial sensing, For the selection-based P-UE, third subframe sub-pool candidates may be applied. Thus, the union of the first, second and third subframe sub-pool candidates may correspond to the candidates of the entire subframe pool.

Thus, in the candidates of the entire subframe pool, Y subframes (i.e., a third subframe sub-pool) and a predetermined period (for example, P subframes) repeated in a predetermined period The remaining subframes except the X subframes (i.e., the second subframe sub-pool) that are repeated in the first subframe subframe (i.e., P subframes) may be determined as the first subframe sub-pool candidates.

Here, the Y subframes constituting the third subframe sub-pool candidates may be determined or selected as described in the example of FIG. Accordingly, after a _bitmap of a length L _bitmap for a subframe pool configuration is repeatedly applied among the Y subframes, a resource for a random resource selection based terminal is allocated to a subframe having a bit value of 1 in the corresponding bitmap 3 sub-frame sub-pools.

Further, the X subframes constituting the second subframe sub-pull candidates may be determined or selected as described in the example of Fig. Accordingly, among the X subframes for the partial sensing based terminal, after the _bitmap of the length L _bitmap for the subframe pool configuration is repeatedly applied, the subframes whose bit value is set to 1 in the corresponding bitmap are allocated to the second subframe Sub-pool.

Here, the X subframes and the Y subframes may be configured so as not to overlap with each other. For example, if X = Y, and what sub-interval of the total P / X (= P / Y) sub-durations is used for X subframes and Y subframes Can be set differently. Information indicating a sub-section to be used as X subframes or Y subframes may be set to a fixed value or may be set through upper level signaling such as RRC. More specifically, when P = 100 and X = Y = 10, as shown in FIG. 14, X subframes among total P / X (= P / Y) sub- Th sub-interval, and Y sub-frames may be set to a second sub-interval.

15 is a diagram showing another example of a subframe pool configuration method according to the present invention.

A subframe pool for a random resource selection based terminal may be defined independently of a subframe pool for a full sensing based terminal. Also, a subframe pool for a partial sensing based terminal may be shared with a subframe pool for a full sensing based terminal.

That is, the sub-frame pool (the first sub-frame pool) for the partial sensing-based terminal and the global sensing-based terminal is divided into one subframe pool (i.e., the entire subframe pool) as defined in FIGS. And can be defined as sub-frames satisfying special conditions. In addition, the subframe pool for a random resource selection based terminal is configured with a subframe pool (first subframe pool) and a subframe pool (second subframe pool) for the partial sensing based terminal and the entire sensing based terminal .

The sub-frame pool for the entire sensing-based terminal may be defined as a part of the first sub-frame pool (i.e., the first sub-frame sub-pool). 12, it is possible to define a sub-frame pool (i.e., a second sub-frame sub-pool) for a random resource selection based terminal in a first sub-frame pool.

13, a sub-frame pool (first sub-frame pool) and a sub-frame pool (second sub-frame pool) for the partial sensing-based terminal and the entire sensing- It can be defined as a subframe pool.

Here, within the first subframe pool, the first subframe sub-pool for the entire sensing terminal and the second subframe sub-pool for the partial sensing based terminal do not overlap with each other. Meanwhile, the second sub-frame pool may be configured independently of the first sub-frame pool.

If the first and second sub-frame sub-pools overlap, the use of the sub-frame can be determined according to a predetermined priority order. For example, a second sub-frame sub-pool for a partial sensing based terminal may be defined to have a higher priority than a first sub-frame sub-pool for a global sensing based terminal. However, this is merely an example, and other priorities may be set.

15, the candidates of the first subframe pool and the candidates of the second subframe pool are the subframes of the subframes having the index {t ^SL ₀ , t ^SL ₁ , ..., t ^SL _{Tmax -1} } It is expressed as a set. More specifically, the candidates of the first sub-frame pool indicated by A in FIG. 15 may correspond to the first set of bitmap-applied subframes, and the candidates of the second subframe pool indicated by B may correspond to the second bitmap application target It may correspond to a set of subframes. That is, the candidates of the first sub-frame pool denoted by A in Fig. 15 and the candidates of the second sub-frame pool denoted by B may be independent from each other.

The two subframe sub-pool candidates at the bottom of FIG. 15 represent the first subframe sub-pool candidates and the second subframe sub-pool candidates, respectively, in the candidates of the first subframe pool denoted by A. For example, first sub-frame sub-pool candidates may be applied to the V-UE based on the global sensing, and second sub-frame sub-pool candidates may be applied to the P-UE based on the partial sensing. As such, the union of the first and second subframe sub-pool candidates may correspond to the candidates of the first subframe pool (i.e., the candidates of the entire subframe pool indicated by A in Fig. 15).

The Y subframes configured in the candidates of the second subframe pool indicated by B in Fig. 15 may be determined or selected as described in the example of Fig. Accordingly, after a _bitmap of a length L _bitmap for a subframe pool configuration is repeatedly applied among the Y subframes, a resource for a random resource selection based terminal is allocated to a subframe having a bit value of 1 in the corresponding bitmap 3 sub-frame sub-pools.

Of the candidates of the first subframe pool indicated by A in Fig. 15, the X subframes constituting the second subframe sub-pool candidates may be determined or selected as described in the example of Fig. Accordingly, among the X subframes for the partial sensing based terminal, after the _bitmap of the length L _bitmap for the subframe pool configuration is repeatedly applied, the subframes whose bit value is set to 1 in the corresponding bitmap are allocated to the second subframe Sub-pool.

Here, the X subframes and the Y subframes may be configured so as not to overlap with each other. For example, if X = Y, and what sub-interval of the total P / X (= P / Y) sub-durations is used for X subframes and Y subframes Can be set differently. Information indicating a sub-section to be used as X subframes or Y subframes may be set to a fixed value or may be set through upper level signaling such as RRC. More specifically, when P = 100 and X = Y = 10, as shown in FIG. 14, X subframes among total P / X (= P / Y) sub- Th sub-interval, and Y sub-frames may be set to a second sub-interval.

Further, within the first subframe pool candidates (e.g., the combination of the first and second subframe sub-pool candidates) shown in FIG. 15A, the subframes for the entire sensing based terminal and the partial sensing based terminal In constructing the frame pool, the _bitmap of the L _bitmap is repeatedly applied to the portion corresponding to the Y subframes for the UE based on the random resource selection in the candidates of the second subframe pool indicated by B in Fig. All bit values can be set to zero.

Further, in constructing the subframe pool for the UE based on the random resource selection in the candidates of the second subframe pool indicated by B in FIG. 15, the candidates of the first subframe pool indicated by A in FIG. 15 , The sum of the first and second subframe sub-pool candidates), a bit value at the time of repeated application of the _bitmap of the L _bitmap to a portion other than the Y subframes for the UE based on the random resource selection All of which can be configured as zero.

Also, a subframe pool for a UE based on a random resource selection in the candidates of the second subframe pool indicated by B in FIG. 15 has a period corresponding to P subframes, and corresponds to Y subframes And may be configured by applying a bitmap only in a section.

FIG. 16 is a flowchart illustrating a resource selection and resource pool determination method based on a terminal type according to the present invention.

In step S1610, the terminal can determine the type of the terminal. The terminal type may be one of a first type (e.g., a global sensing based terminal), a second type (e.g., a partial sensing based terminal), or a third type have. This terminal type can be defined in the case of a UE autonomous resource selection mode or mode 4.

In the steps S1621, S1623, and S1625, the first, second, or third sub-frame sub-pool candidates corresponding to a part of all the sub-frame pool candidates may be determined according to the type of the UE. Here, the candidates of the entire subframe pool may correspond to the bitmap application target subframe set described above. That is, the candidates of the entire subframe pool are allocated to specific subframes (for example, a subframe in which the SLSS resource is set, a TDD DL subframe in which the SLSS resource is set, Frames or special subframes, and / or the above bitmap non-serving subframes).

In step S1621, the first type terminal may determine the first sub-frame sub-pool candidates. The first sub-frame sub-pool candidates may be determined as the sub-frames excluding the second sub-frame sub-pool candidates and / or the third sub-frame sub-pool candidates in the candidates of the entire sub-frame pool. Here, the candidates of the entire subframe pool to which the first, second and third subframe sub-pool candidates belong may be shared. Alternatively, the candidates of the entire sub-frame pool to which the first and second sub-frame sub-pool candidates belong are shared, but the candidates of the entire sub-frame pool to which the third sub-frame sub-pool candidates belong can be independently determined.

In step S1623, the second type terminal may determine the second sub-frame sub-pool candidates. The second sub-frame sub-pool candidates may be determined as shown in the example of Fig. For example, the collection of which is X * i ₁ sub X subframes, starting, based on the offset of the frame to repeat a cycle corresponding to the number P of sub-frame sub-frame, a second sub-frame sub-in pool candidates Can be determined.

In step S1625, the third type terminal may determine the third sub-frame sub-pool candidates. The third sub-frame sub-pool candidates may be determined as shown in the example of FIG. For example, X * a set of i ₂ sub-Y is started, based on the offset of the frame (= k * X) subframes are subframe that is repeated a cycle that corresponds to the P sub-frame, a third sub- Frame sub-pool candidates.

Here, the second sub-frame sub-pool candidates and the third sub-frame sub-pool candidates may be set not to overlap.

In steps S1631, S1633, and S1635, the terminal can determine a subframe sub-pool among the subframe sub-pool candidates based on the bitmap.

In step S1631, the first type terminal may repeatedly apply the _bitmap of the L _bitmap length among the first subframe sub-pool candidates to determine the subframes of the position indicated by 1 in the bitmap as the first subframe sub-pool .

In step S1633, the second type terminal may repeatedly apply the _bitmap of the L _bitmap length among the second subframe sub-pool candidates to determine the subframes of the position indicated by 1 in the bitmap as the second subframe sub-pool .

In step S1635, the third type terminal may repeatedly apply the _bitmap of the L _bitmap length among the third subframe sub-pool candidates to determine the subframes of the position indicated by 1 in the bitmap as the third subframe sub-pool .

Here, the second sub-frame sub-pool and the third sub-frame sub-pool may be set so as not to overlap.

In steps S1641, S1643, and S1645, the terminal can determine a subframe in which to transmit the SA and / or Data. The subframe for transmitting SA and / or Data may correspond to TTI m + c, TTI m + e, TTI m + c ', TTI m + e' in the above examples.

In step S1641, the first type terminal determines whether the SA and / or the Data (Data) based on the sensing result on the sensing window of the first type (for example, 1000 subframes) among the first subframe sub- Frame to be transmitted.

In step S1643, the second type terminal determines whether or not the second type of sensing window (e.g., the subframes corresponding to the X subframe among the 1000 subframes) among the second subframe sub- It is possible to determine a subframe in which SA and / or Data are to be transmitted based on the sensing result.

In step S1645, the third type UE can randomly determine a subframe in which SA and / or Data are to be transmitted among the third subframe sub-pool determined by the bitmap.

In step S1650, the terminal can transmit SA and / or Data to another terminal on the transmission subframe determined in steps S1641, S1643, and S1645.

The various embodiments of the disclosure are not intended to be all-inclusive and are intended to illustrate representative aspects of the disclosure, and the features described in the various embodiments may be applied independently or in a combination of two or more.

In addition, various embodiments of the present disclosure may be implemented by hardware, firmware, software, or a combination thereof. In the case of hardware implementation, one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays A general processor, a controller, a microcontroller, a microprocessor, and the like.

The scope of the present disclosure is to be accorded the broadest interpretation as understanding of the principles of the invention, as well as software or machine-executable instructions (e.g., operating system, applications, firmware, Instructions, and the like are stored and are non-transitory computer-readable medium executable on the device or computer.

17 is a diagram for explaining a configuration of a wireless device according to the present invention.

17 shows an example of a V2X communication or a direct link (for example, a V2X communication or a direct link) between a terminal device 100 that transmits control information and data for V2X communication or a direct link (e.g., D2D, ProSe, or SL) , D2D, ProSe, or SL) communication to the terminal device 100 according to an embodiment of the present invention.

The terminal device 100 may include a processor 110, an antenna unit 120, a transceiver 130, and a memory 140. [

The processor 110 performs baseband-related signal processing and may include an upper layer processing unit 111 and a physical layer processing unit 112. The upper layer processing unit 111 may process an operation of a MAC (Medium Access Control) layer, an RRC (Radio Resource Control) layer, or a higher layer. The physical layer processing unit 112 may process an operation of a physical (PHY) layer (e.g., uplink transmission signal processing, downlink reception signal processing). The processor 110 may control the overall operation of the terminal device 100, in addition to performing baseband-related signal processing.

The antenna unit 120 may include one or more physical antennas and may support Multiple Input Multiple Output (MIMO) transmission and reception when the antenna unit 120 includes a plurality of antennas. The transceiver 130 may include a radio frequency (RF) transmitter and an RF receiver. The memory 140 may store information processed by the processor 110, software related to the operation of the terminal device 100, an operating system, applications, and the like, and may include components such as buffers.

The base station apparatus 200 may include a processor 210, an antenna unit 220, a transceiver 230, and a memory 240.

The processor 210 performs baseband-related signal processing, and may include an upper layer processing unit 211 and a physical layer processing unit 212. The upper layer processing unit 211 may process the operations of the MAC layer, the RRC layer, or higher layers. The physical layer processing unit 212 can process the operation of the PHY layer (e.g., downlink transmission signal processing, uplink reception signal processing). In addition to performing baseband related signal processing, the processor 210 may also control operation of the entire base station apparatus 200. [

The antenna unit 220 may include one or more physical antennas, and may support MIMO transmission / reception when the antenna unit 220 includes a plurality of antennas. The transceiver 230 may include an RF transmitter and an RF receiver. The memory 240 may store information processed by the processor 210, software related to the operation of the base station 200, an operating system, applications, and the like, and may include components such as buffers.

The processor 110 of the terminal device 100 can be configured to implement the terminal operation in the embodiments described in the present invention.

For example, the upper layer processing unit 111 of the processor 110 of the terminal device 100 includes a type determination unit 1710, a subframe sub-pool candidate determination unit 1720, a subframe sub-pool determination unit 1730 ), And a transmission sub-frame determination unit 1740.

The type determination unit 1710 determines a type of the terminal based on the first type (e.g., the entire sensing based terminal), the second type (e.g., partial sensing based terminal), the third type Can be determined.

The sub-frame sub-pull candidate determining unit 1720 can determine the sub-frame sub-pull candidates in a different manner depending on the terminal type.

For example, in the case of the second type, it is possible to determine the second sub-frame sub-pool candidates based on the values of X, i ₁ , P and the like among the total sub-frame pool candidates. In the case of the third type, the third sub-frame sub-pool candidates can be determined based on values of X, i ₂ , P, Y (= k * X) among all the sub-frame pool candidates. These X, the value of i _1, i _2, such as Y, k, P may also be defined as a fixed value in the system, may be determined based on the value provided by the base station, the determined one of the plurality of candidate values It is possible. On the other hand, in the case of the first type, the first sub-frame sub-pool candidates can be determined to be the remaining sub-frames excluding the second sub-frame sub-pool candidates and the third sub-frame sub- have.

The sub-frame sub-pool determination unit 1730 can determine sub-frames indicated by 1 in the bitmap as sub-frame sub-pools from among the respective sub-frame sub-pool candidates.

The transmission sub-frame determination unit 1740 can determine, among each sub-frame sub-pool, a sub-frame to transmit SA and / or Data based on sensing or at random.

The physical layer processing unit 112 of the processor 110 of the terminal device 100 transmits the data to the upper layer processing unit 111 on the transmission sub frame determined by the transmission sub frame determination unit 1740 of the upper layer processing unit 111 Control information and / or data to other terminal devices (not shown).

The processor 210 of the base station device 200 may be configured to implement base station operation in the embodiments described herein.

For example, the upper layer processing unit 211 of the processor 210 of the base station apparatus 200 may include a subframe sub-pool candidate parameter determination unit 1750 and a bitmap determination unit 1760.

The sub-frame sub-pull candidate parameter determiner 1750 determines parameters that are the basis of determination of the sub-frame sub-pull candidates to be applied to the terminals of the respective types (e.g., first, second and third types) You can decide. For example, the subframe sub-pool candidate determiner 1750 determines parameters (e.g., X, i ₁ , i ₂ , Y, k, P One or more of &lt; / RTI &gt;

The bitmap determining unit 1760 may generate information indicating a subframe to be set as a subframe sub-pool among the subframe sub-pool candidates for each type of terminal (i.e., bitmap).

The information generated by the processing unit 211 in the upper layer can be transmitted to the terminal device 100 via the physical layer processing unit 212. [

In the operation of the terminal device 100 and the base station device 200, the same elements as those described in the exemplary embodiments of the present invention can be similarly applied, and redundant description will be omitted.

While various embodiments of the present invention have been described with reference to 3GPP LTE or LTE-A systems, they may be applied to various mobile communication systems.

Claims (3)

A method of determining a resource pool of a terminal for V2X,
Determining a type of the terminal;
Determining sub-frame sub-pool candidates based on the terminal type; And
And determining a subframe sub-pool based on the bitmap among the subframe sub-pool candidates. The method according to claim 1,
If the type of the UE is a partial sensing based terminal type, subframe sub-pool candidates are determined based on information on the offset, the period, and the lengths of consecutive subframes,
Based on the sensing result in a part of the sub-frame sub-pool for the partial sensing based terminal type, a transmission sub-frame is determined in the sub-frame sub-
Wherein one or more of control information or data is transmitted to another terminal on the transmission subframe for the partial sensing based terminal type. 3. The method of claim 2,
Based on the information on the offset for the partial sensing based terminal type, the period, and the lengths of the consecutive subframes, if the type of the terminal is a random resource selection based terminal type, An offset, a period and a length of consecutive sub-frames are determined,
Sub-frame sub-pool candidates are determined based on the offset for the random resource selection based terminal type, the period and the length of the consecutive sub-frames,
A subframe sub-pool is determined based on a bitmap among the subframe sub-pool candidates for the random resource selection based terminal type,
Frame based on a result of sensing in a part of the sub-frame sub-pool for the random resource selection based terminal type, the transmission sub-frame is determined in the sub-
Wherein at least one of control information or data is transmitted to another terminal on the transmission subframe for the random resource selection based terminal type.

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