CN116508378A

CN116508378A - Method and apparatus for partial snoop operations in side link communications

Info

Publication number: CN116508378A
Application number: CN202180079786.9A
Authority: CN
Inventors: 洪義贤
Original assignee: Hyundai Motor Co; Kia Corp
Current assignee: Hyundai Motor Co; Kia Corp
Priority date: 2020-11-26
Filing date: 2021-11-25
Publication date: 2023-07-28

Abstract

The invention discloses a method and a device for partial interception operation in side link communication. The operation method of the transmitting terminal comprises the following steps: receiving configuration information of an additional part of the listening window from the base station; determining one or more candidate resources by performing a listening operation in a listening window; confirming an occupied state of at least one candidate resource among the one or more candidate resources by performing a partial listening operation in an additional partial listening window configured according to the configuration information; and determining a first candidate resource of the one or more candidate resources as a transmission resource by taking into account the occupancy state within the selection window.

Description

Method and apparatus for partial snoop operations in side link communications

Technical Field

The present disclosure relates to a side link communication technology, and more particularly, to a technology for configuring a partial listening window and performing a partial listening operation within the partial listening window.

Background

In order to handle wireless data that has been rapidly increased after commercialization of a fourth-generation (4G) communication system (for example, a long term evolution (Long Term Evolution, LTE) communication system, an LTE-Advanced (LTE-a) communication system), a fifth-generation (5G) communication system (for example, a New Radio (NR) communication system) that uses a frequency band of the 4G communication system (for example, a frequency band of 6GHz or less) and a frequency band higher than that of the 4G communication system (for example, a frequency band of 6GHz or more) is considered. The 5G communication system can support enhanced mobile broadband (Enhanced Mobile Broadband, eMBB) communication, ultra-Reliable and Low-latency communication (URLLC), mass machine type communication (massive Machine Type Communication, mctc), and the like.

The 4G communication system and the 5G communication system are capable of supporting Vehicle-to-Everything (V2X) communication (e.g., side link communication). V2X communication supported in a Cellular communication system such as a 4G communication system, a 5G communication system, or the like may be referred to as "Cellular-V2X (C-V2X) communication". V2X communications (e.g., C-V2X communications) may include Vehicle-to-Vehicle (V2V) communications, vehicle-to-Infrastructure (V2I) communications, vehicle-to-Pedestrian (V2P) communications, vehicle-to-Network (V2N) communications, and the like.

In cellular communication systems, V2X communication (e.g., C-V2X communication) may be performed based on side link communication technologies (e.g., proximity-based Service (ProSe) communication technologies, device-to-Device (D2D) communication technologies, etc.). For example, a side link channel may be established for vehicles participating in V2V communication (e.g., side link communication), and communication between vehicles may be performed using the side link channel. Side-chain communication may be performed using Configured Grant (CG) resources. CG resources may be periodically configured and may be utilized to transmit periodic data (e.g., periodic side link data).

On the other hand, the terminal may determine one or more candidate resources by performing a listening operation within a listening window, determine a transmission resource from the one or more candidate resources by performing a selection operation within a selection window, and perform side link communication using the transmission resource. During a period from the end time of the listening window to the start time of the selection window, the listening operation and/or the selection operation may not be performed.

On the other hand, in a period before the transmission resource selected by the selection operation, or in a period from the end time of the listening window to the start time of the selection window, a re-evaluation operation and/or a preemption (pre-emission) operation may be performed. The resources selected by the re-evaluation operation and/or the preemption operation may conflict with the resources determined by the selection operation described above. In this case, the side link transmission may fail.

Disclosure of Invention

Technical problem

The present disclosure for solving the above problems aims to provide a method and apparatus for configuring a partial listening window and performing a partial listening operation.

Technical proposal

According to a first exemplary embodiment of the present disclosure for achieving the above object, a method of transmitting a terminal may include: receiving configuration information of an additional part of the listening window from the base station; determining one or more candidate resources by performing a listening operation in a listening window; confirming an occupied state of at least one candidate resource among the one or more candidate resources by performing a partial listening operation in an additional partial listening window configured according to the configuration information; determining a first candidate resource of the one or more candidate resources as a transmission resource by taking into account the occupancy state within the selection window; and performing side-chain communication with the receiving terminal using the transmission resource.

Can be in period t _y -P _step ,t _y ]Internally configuring an additional part of the listening window, t _y Is the start time of a particular candidate resource within the selection window, P _step Is the configuration period of the existing additional part of the listening window within the listening window.

The configuration period of the additional part listening window may be set to be P _step Short.

The configuration information may include at least one of: a type 2-bitmap indicating a start time of the additional part listening window, information indicating the number of times the type 2-bitmap is applied, a configuration period of the additional part listening window, information indicating a proportion of the configuration period, and an enable indicator indicating whether to configure the additional part listening window.

When the number of times of application type 2-bitmap is N, a period [ t ] of the additional partial listening window is configured _y -P _step ,t _y ]May be divided into N periods, and a type 2-bitmap may be applied to each of the N periods, N being a natural number.

The configuration period of the additional partial listening window may be inversely proportional to the number of times the type 2-bitmap is applied.

The size of the additional partial listening window may be determined according to a ratio of the first value or the second value in the type 2-bitmap.

The configuration period of the additional partial listening window may be differently set for each subcarrier spacing.

The candidate resources occupied by other terminals among the one or more candidate resources may not be determined as transmission resources.

The occupied candidate resource may be a resource selected by a re-evaluation operation or a preemption operation.

According to a second exemplary embodiment of the present disclosure for achieving the above object, a transmitting terminal may include a processor and a memory storing one or more instructions executable by the processor, and may execute the one or more instructions to: receiving configuration information of an additional part of the listening window from the base station; determining one or more candidate resources by performing a listening operation in a listening window; confirming an occupied state of at least one candidate resource among the one or more candidate resources by performing a partial listening operation in an additional partial listening window configured according to the configuration information; determining a first candidate resource of the one or more candidate resources as a transmission resource by taking into account the occupancy state within the selection window; and performing side-chain communication with the receiving terminal using the transmission resource.

Can be in period t _y -P _step ,t _y ]Internally configuring an additional part of the listening window, t _y Is the start time of a particular candidate resource within the selection window, P _step Is a configuration period of an existing additional partial listening window within the listening window, and the configuration period of the additional partial listening window may be set to be less than P _step Short.

The candidate resources occupied by other terminals among the one or more candidate resources may not be determined as transmission resources, and the occupied candidate resources may be resources selected through a re-evaluation operation or a preemption operation.

Advantageous effects

According to the present disclosure, an additional partial listening window may be configured, and the transmitting terminal may confirm the occupancy state of the candidate resource by performing a partial listening operation in the additional partial listening window. The transmitting terminal may select resources other than the occupied candidate resources as transmission resources within the selection window, and may perform side-chain communication with the receiving terminal using the transmission resources. Since the partial listening operation is additionally performed, the resource collision probability can be reduced, and the side link communication can be efficiently performed.

Drawings

Fig. 1 is a conceptual diagram illustrating a V2X communication scenario.

Fig. 2 is a conceptual diagram illustrating a first exemplary embodiment of a cellular communications system.

Fig. 3 is a conceptual diagram illustrating a first exemplary embodiment of a communications node forming a cellular communications system.

Fig. 4 is a block diagram illustrating a first exemplary embodiment of a user plane protocol stack of a UE performing side link communication.

Fig. 5 is a block diagram illustrating a first exemplary embodiment of a control plane protocol stack of a UE performing side link communication.

Fig. 6 is a block diagram illustrating a second exemplary embodiment of a control plane protocol stack of a UE performing side link communication.

Fig. 7 is a conceptual diagram illustrating a first exemplary embodiment of a partial snoop operation in side-link communication.

Fig. 8 is a sequence diagram showing a first exemplary embodiment of a method for configuring an additional partial listening window in side link communication.

Fig. 9 is a conceptual diagram illustrating a first exemplary embodiment of an additional part listening window in side link communication.

Fig. 10 is a conceptual diagram illustrating an area in which a random resource selection operation is performed and an area in which a partial listening operation is performed.

Detailed Description

As the present disclosure is susceptible to various modifications and alternative forms, specific exemplary embodiments have been shown in the drawings and will be described in detail herein. It should be understood, however, that there is no intent to limit the disclosure to the particular exemplary embodiments, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the disclosure.

Relational terms such as first, second, and the like may be used to describe various components, but are not limited by these terms. These terms are only used to distinguish one element from another element. For example, a first component could be termed a second component, and a second component could be similarly named a first component, without departing from the scope of the present disclosure. The term "and/or" refers to any one or combination of a plurality of related and described items.

In exemplary embodiments of the present disclosure, "at least one of a and B" may refer to "at least one of a or B" or "at least one of a combination of one or more of a and B". In addition, "one or more of a and B" may refer to "one or more of a or B" or "one or more of a and B in combination.

In an exemplary embodiment of the present disclosure, (re) transmission may refer to "transmission", "re-transmission" or "transmission and re-transmission", "re-configuration" may refer to "configuration", "re-configuration" or "configuration and re-configuration", "connection" may refer to "connection", "re-connection" or "connection and re-connection", and (re) access may refer to "access", "re-access" or "access and re-access".

When referring to a component as being "coupled" or "connected" to another component, it is to be understood that the component is directly "coupled" or "connected" to the other component, or that other components may be interposed therebetween. On the other hand, when referring to a component as being "directly coupled" or "directly connected" to another component, it should be understood that no other component is disposed therebetween.

The terminology used in the present disclosure is for the purpose of describing particular example embodiments only and is not intended to be limiting of the disclosure. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this disclosure, terms such as "comprises" or "comprising" are intended to indicate the presence of features, numbers, steps, operations, components, portions, or combinations thereof described in the specification, but it is understood that such terms do not preclude the presence or addition of one or more features, numbers, steps, operations, components, portions, or combinations thereof.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Terms defined in commonly used dictionaries should be interpreted as including meanings that match the context of the art. In this specification, unless explicitly defined otherwise, the terms are not necessarily to be construed as including the meaning of an ideal or overformal.

Hereinafter, preferred exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In describing the present disclosure, in order to facilitate a comprehensive understanding of the present disclosure, like reference numerals refer to like components throughout the description of the drawings, and duplicate descriptions will be omitted.

Fig. 1 is a conceptual diagram illustrating a V2X communication scenario.

As shown in fig. 1, V2X communications may include vehicle-to-vehicle (V2V) communications, vehicle-to-infrastructure (V2I) communications, vehicle-to-pedestrian (V2P) communications, vehicle-to-network (V2N) communications, and so forth. V2X communications may be supported by cellular communication system 140 (e.g., a cellular communication network), and V2X communications supported by cellular communication system 140 may be referred to as "cellular-V2X (C-V2X) communications. Here, the cellular communication system 140 may include a 4G communication system (e.g., an LTE communication system or an LTE-a communication system), a 5G communication system (e.g., an NR communication system), and the like.

V2V communication may represent communication between vehicle #1 100 (e.g., a communication node located in vehicle #1 100) and vehicle #2 110 (e.g., a communication node located in vehicle #1 100). Driving information such as speed, heading, time, location, etc. may be exchanged between vehicles 100, 110 via V2V communication. Autonomous driving (e.g., queued traveling) may be supported based on driving information exchanged via V2V communication. V2V communications supported in cellular communication system 140 may be performed based on "side link" communication technologies (e.g., proSe and D2D communication technologies, etc.). In this case, communication between the vehicles 100, 110 may be performed using a side link channel.

V2I communication may represent communication between vehicle #1 100 and a roadside-located infrastructure (e.g., a Road Side Unit (RSU)) 120. The infrastructure 120 may include traffic lights or street lamps located at roadsides. For example, when V2I communication is performed, communication may be performed between a communication node located in the vehicle #1 100 and a communication node located in a traffic light. Traffic information, driving information, and the like may be exchanged between the vehicle #1 100 and the infrastructure 120 through V2I communication. V2I communications supported in the cellular communication system 140 may also be performed based on side link communication technologies (e.g., proSe communication technology and D2D communication technology, etc.). In this case, communication between the vehicle #1 100 and the infrastructure 120 may be performed using a side link channel.

The V2P communication may represent communication between the vehicle #1 100 (e.g., a communication node located in the vehicle #1 100) and the person 130 (e.g., a communication node carried by the person 130). Driving information of the vehicle #1 100 and movement information of the person 130 such as speed, direction, time, position, etc. may be exchanged between the vehicle #1 100 and the person 130 through V2P communication. The communication node located in the vehicle #1 100 or the communication node carried by the person 130 may judge a dangerous situation based on the obtained driving information and movement information, thereby generating an alarm indicating a danger. V2P communication supported in the cellular communication system 140 may be performed based on side link communication technologies (e.g., proSe communication technology and D2D communication technology, etc.). In this case, communication between communication nodes located in the vehicle #1 100 or communication nodes carried by the person 130 may be performed using a side link channel.

V2N communication may represent communication between vehicle #1 100 (e.g., a communication node located in vehicle # 1) and cellular communication system 140 (e.g., a cellular communication network). V2N communication may be performed based on a 4G communication technology (e.g., LTE or LTE-a specified by the 3GPP standard) or a 5G communication technology (e.g., NR specified by the 3GPP standard). Further, V2N communication may be performed based on a communication technology defined in Institute of Electrical and Electronics Engineers (IEEE) 702.11, such as an in-vehicle environment wireless access (Wireless Access in Vehicular Environments, WAVE) communication technology, a wireless local area network (Wireless Local Area Network, WLAN) communication technology, or the like, a communication technology defined in IEEE702.15, such as a wireless personal area network (Wireless Personal Area Network, WPAN) communication technology, or the like.

On the other hand, the cellular communication system 140 supporting V2X communication may be configured as follows.

As shown in fig. 2, the cellular communication system may include an access network, a core network, and the like. The access network may include base stations 210, repeaters 220, user Equipment (UEs) 231 through 236, and the like. UEs 231-236 may include communication nodes located in vehicles 100, 110 of fig. 1, communication nodes located in infrastructure 120 of fig. 1, communication nodes carried by person 130 of fig. 1, and so forth. When the cellular communication system supports the 4G communication technology, the core network may include a Serving Gateway (S-GW) 250, a packet data network (Packet Data Network, PDN) Gateway (P-GW) 260, a mobility management entity (Mobility Management Entity, MME) 270, and the like.

When the cellular communication system supports 5G communication technologies, the core network may include user plane functions (User Pane Function, UPF) 250, session management functions (Session Management Function, SMF) 260, access and mobility management functions (Access and Mobility Management Function, AMF) 270, and the like. Alternatively, when a Non-independent (NSA) mode is supported in the cellular communication system, the core network formed by the S-GW 250, the P-GW 260, and the MME 270 may support both the 4G communication technology and the 5G communication technology, and the core network formed by the UPF 250, the SMF 260, and the AMF 270 may support both the 5G communication technology and the 4G communication technology.

In addition, when the cellular communication system supports a network slice division (network slice) technique, the core network may be divided into a plurality of logical network slices. For example, a network slice supporting V2X communication (e.g., V2V network slice, V2I network slice, V2P network slice, V2N network slice, etc.) may be configured, and V2X communication may be supported by the V2X network slice configured in the core network.

Communication nodes (e.g., base stations, repeaters, UEs, S-GWs, P-GW, MME, UPF, SMF, AMF, etc.) that constitute a cellular communication system may perform communications by utilizing at least one of the following communication techniques: code division multiple access (Code Division Multiple Access, CDMA) technology, wideband Code Division Multiple Access (WCDMA) technology, time division multiple access (Time Division Multiple Access, TDMA) technology, frequency division multiple access (Frequency Division Multiple Access, FDMA) technology, orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing, OFDM) technology, filtered OFDM technology, orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA) technology, single Carrier FDMA (SC-FDMA) technology, non-orthogonal multiple access (Non-Orthogonal Multiple Access, NOMA) technology, generalized frequency division multiplexing (Generalized Frequency Division Multiplexing, GFDM) technology, filter bank multicarrier (Filter Bank Multi-Carrier, FBMC) technology, universal filtered multicarrier (Universal Filtered Multi-Carrier, UFMC) technology, and spatial division multiple access (Space Division Multiple Access, SDMA) technology.

Communication nodes (e.g., base stations, repeaters, UEs, S-GWs, P-GW, MME, UPF, SMF, AMF, etc.) constituting a cellular communication system may be configured as follows.

Fig. 3 is a block diagram illustrating a first exemplary embodiment of a communication node forming a cellular communication system.

As shown in fig. 3, the communication node 300 may include at least one processor 310, a memory 320, and a transceiver 330 connected to a network to perform communication. In addition, the communication node 300 may further comprise an input interface device 340, an output interface device 350, a storage device 360, etc. Each of the components included in communication node 300 may be connected and communicate with each other via bus 370.

However, components included in communication node 300 may be connected to processor 310 through separate interfaces or separate buses instead of common bus 370. For example, the processor 310 may be connected to at least one of the memory 320, the transceiver 330, the input interface device 340, the output interface device 350, and the storage device 360 through a dedicated interface.

Processor 310 may execute program instructions stored in at least one of memory 320 and storage 360. Processor 310 may refer to a Central Processing Unit (CPU), a Graphics Processing Unit (GPU), or a special purpose processor that performs methods in accordance with embodiments of the present disclosure. Each of the memory 320 and the storage 360 may include at least one of a volatile storage medium and a nonvolatile storage medium. For example, the memory 320 may include at least one of a Read Only Memory (ROM) and a Random Access Memory (RAM).

Referring again to fig. 2, in the communication system, a base station 210 may form a macro cell (macro cell) or a small cell (small cell) and may be connected to a core network through an ideal backhaul (ideal backhaul) or a non-ideal backhaul (non-ideal backhaul). The base station 210 may transmit signals received from the core network to the UEs 231 to 236 and the repeater 220, and may transmit signals received from the UEs 231 to 236 and the repeater 220 to the core network. Ue#1 231, ue#2 232, ue#4234, ue#5 235, and ue#6 236 may belong to the cell coverage of base station 210.Ue#1 231, ue#2 232, ue#4234, ue#5 235, and ue#6 236 may be connected to the base station 210 by performing a connection establishment procedure with the base station. Ue#1 231, ue#2 232, ue#4234, ue#5 235, and ue#6 236 may communicate with the base station 210 after being connected to the base station 210.

Repeater 220 may be connected to base station 210 and may relay communications between base station 210 and ue#3 233 and ue#4 234. That is, the repeater 220 may transmit signals received from the base station 210 to the ue#3 233 and the ue#4234, and may transmit signals received from the ue#3 233 and the ue#4234 to the base station 210.UE #4234 may be within the cell coverage of base station 210 and the cell coverage of repeater 220, while UE #3 233 may be within the cell coverage of repeater 220. That is, ue#3 233 may be located outside of the cell coverage of base station 210. Ue#3 233 and ue#4234 may connect to the repeater 220 by performing a connection setup procedure with the repeater 220.Ue#3 233 and ue#4234 may communicate with repeater 220 after being connected to repeater 220.

Base station 210 and repeater 220 may support multiple-input multiple-output (MIMO) communication techniques (e.g., single-user (SU) -MIMO, multi-user (MU) -MIMO, massive MIMO, etc.), coordinated multi-point (Coordinated Multipoint, coMP) communication techniques, carrier aggregation (Carrier Aggregation, CA) communication techniques, unlicensed band (unlicensed band) communication techniques (e.g., licensed assisted access (Licensed Assisted Access, LAA), enhanced LAA (eLAA), etc.), side-link communication techniques (e.g., proSe communication techniques, D2D communication techniques), etc. Ue#1 231, ue#2 232, ue#5 235, and ue#6 236 may perform operations corresponding to base station 210, operations supported by base station 210, and the like. Ue#3 233 and ue#4 234 may perform operations corresponding to repeater 220, operations supported by repeater 220, and the like.

Herein, the base station 210 may be referred to as a Node B (NB), an evolved node B (eNB), a base transceiver station (Base Transceiver station, BTS), a Radio remote head (Radio Remote Head, RRH), a transmission reception point (Transmission Reception Point, TRP), a Radio Unit (RU), a roadside Unit (RSU), a Radio transceiver, an access point, an access node, and the like. The repeater 220 may be referred to as a small base station, a relay node, or the like. Each of the ue#1 231 to ue#6 236 may be referred to as a terminal, an access terminal, a mobile terminal, a station, a subscriber station, a mobile station, a portable subscriber station, a node, an apparatus, an On-board Unit (OBU), or the like.

On the other hand, communication between ue#5 235 and ue#6 236 may be performed based on side link communication technologies (e.g., proSe communication technology, D2D communication technology). The side link communication may be performed based on a one-to-one scheme or a one-to-many scheme. When V2V communication is performed using a side link communication technology, ue#5 235 may be a communication node located in vehicle#1 100 of fig. 1, and ue#6 236 may be a communication node located in vehicle#2 110 of fig. 1. When V2I communication is performed using a side link communication technology, ue#5 235 may be a communication node located in vehicle#1 100 of fig. 1, and ue#6 236 may be a communication node located in infrastructure 120 of fig. 1. When V2P communication is performed using a side link communication technology, ue#5 235 may be a communication node located in vehicle #1100 of fig. 1, and ue#6 236 may be a communication node carried by person 130 of fig. 1.

The scenarios of application side link communications may be categorized according to the location of UEs participating in the side link communications (e.g., UE #5 235 and UE #6 236) as shown in table 1 below. For example, the scenario of side link communication between ue#5 235 and ue#6 236 shown in fig. 2 may be a side link communication scenario #c.

TABLE 1

Side link communication scenario	Location of UE #5 235	Position of UE #6236
			#A	Outside the coverage area of base station 210	Outside the coverage area of base station 210
#B	In the coverage area of base station 210	Outside the coverage area of base station 210
			#C	In the coverage area of base station 210	In the coverage area of base station 210
#D	In the coverage area of base station 210	In the coverage area of base station 210

On the other hand, the user plane protocol stacks of UEs performing side link communication (e.g., ue#5 235 and ue#6 236) may be configured as follows.

As shown in fig. 4, ue#5 235 may be ue#5 235 shown in fig. 2, and ue#6236 may be ue#6236 shown in fig. 2. The scenario of the side link communication between ue#5 235 and ue#6236 may be one of the side link communication scenarios #a to #d of table 1. The user plane protocol stack of each of UE #5 235 and UE #6236 may include a Physical (PHY) layer, a medium access control (Medium Access Control, MAC) layer, a radio link control (Radio Link Control, RLC) layer, a packet data convergence protocol (Packet Data Convergence Protocol, PDCP) layer, and the like.

Side link communications between ue#5 235 and ue#6236 may be performed using a PC5 interface (e.g., a PC5-U interface). Layer 2 Identifiers (IDs) (e.g., source layer 2ID, destination layer 2 ID) may be used for side link communications, and layer 2ID may be an ID configured for V2X communications. Further, in the side link communication, a hybrid automatic repeat request (HARQ) feedback operation may be supported, and an RLC acknowledged mode (RLC Acknowledged Mode, RLC AM) or an RLC unacknowledged mode (RLC Unacknowledged Mode, RLC UM) may be supported.

On the other hand, control plane protocol stacks of UEs performing side link communication (e.g., ue#5 235 and ue#6 236) may be configured as follows.

Fig. 5 is a block diagram illustrating a first exemplary embodiment of a control plane protocol stack of a UE performing side link communication, and fig. 6 is a block diagram illustrating a second exemplary embodiment of a control plane protocol stack of a UE performing side link communication.

As shown in fig. 5 and 6, ue#5 235 may be ue#5 235 shown in fig. 2, and ue#6 may be ue#6236 shown in fig. 2. The scenario of the side link communication between ue#5 235 and ue#6236 may be one of the side link communication scenarios #a to #d of table 1. The control plane protocol stack shown in fig. 5 may be a control plane protocol stack for transmitting and receiving broadcast information, e.g., a physical side link broadcast channel (Physical Sidelink Broadcast Channel, PSBCH).

The control plane protocol stack shown in fig. 5 may include a PHY layer, a MAC layer, an RLC layer, and a radio resource control (Radio Resource Control, RRC) layer. Side link communications between UE #5 235 and UE #6236 may be performed using a PC5 interface (e.g., a PC5-C interface). The control plane protocol stack shown in fig. 6 may be a control plane protocol stack for one-to-one side link communication. The control plane protocol stack shown in fig. 6 may include PHY layer, MAC layer, RLC layer, PDCP layer, and PC5 signaling protocol layer.

On the other hand, channels used in the sidelink communication between ue#5 235 and ue#6236 may include a physical side link shared channel (Physical Sidelink Shared Channel, PSSCH), a physical side link control channel (Physical Sidelink Control Channel, PSCCH), a physical side link discovery channel (Physical Sidelink Discovery Channel, PSDCH), and a physical side link broadcast channel (PSBCH). The PSSCH may be used to transmit and receive side link data and may be configured in a UE (e.g., UE #5 235 or UE # 6236) through higher layer signaling. The PSCCH may be used to transmit and receive side link control information (SCI) and may also be configured in a UE (e.g., UE #5 235 or UE #6 236) by higher layer signaling.

The PSDCH may be used for discovery (discovery) procedures. For example, the discovery signal may be transmitted through the PSDCH. The PSBCH may be used to transmit and receive broadcast information (e.g., system information). Further, demodulation reference signals (Demodulation Reference Signal, DMRS), synchronization signals (Synchronization Signal), and the like may be used in the side link communication between the ue#5 235 and the ue#6 236. The synchronization signals may include a primary side link synchronization signal (Primary Sidelink Synchronization Signal, PSSS) and a secondary side link synchronization signal (Secondary Sidelink Synchronization Signal, SSSS).

On the other hand, the side link transmission modes (Transmission Mode, TM) can be classified into side links tm#1 to tm#4 as shown in table 2 below.

TABLE 2

Side link TM	Description of the invention
		#1	Transmitting using resources scheduled by a base station
#2	Scheduling of UE autonomous transmissions without base station
		#3	Transmitting in V2X communication using base station scheduled resources
#4	Autonomous transmission by a UE in V2X communication without scheduling by a base station

When supporting side link tm#3 or tm#4, each of ue#5235 and ue#6 236 may perform side link communication using a resource pool configured by base station 210. The resource pool may be configured for each of side link control information and side link data.

The resource pool for the side link control information may be configured based on an RRC signaling procedure (e.g., dedicated RRC signaling procedure, broadcast RRC signaling procedure). The resource pool for receiving the side link control information may be configured through a broadcast RRC signaling procedure. When supporting the side link TM #3, the resource pool for transmitting the side link control information can be configured through a dedicated RRC signaling procedure. In this case, the side link control information may be transmitted through resources scheduled by the base station 210 within a resource pool configured by a dedicated RRC signaling procedure. When the side link TM #4 is supported, the resource pool for transmitting the side link control information may be configured through a dedicated RRC signaling procedure or a broadcast RRC signaling procedure. In this case, the side link control information may be transmitted through resources autonomously selected by the UE (e.g., UE #5235 or UE #6 236) within a resource pool configured by a dedicated RRC signaling procedure or a broadcast RRC signaling procedure.

When the side link tm#3 is supported, a resource pool for transmitting and receiving side link data may not be configured. In this case, the side link data may be transmitted and received through resources scheduled by the base station 210. When the side link TM #4 is supported, a resource pool for transmitting and receiving side link data may be configured through a dedicated RRC signaling procedure or a broadcast RRC signaling procedure. In this case, the side link data may be transmitted and received through resources autonomously selected by the UE (e.g., ue#5 235 or ue#6 236) among a resource pool configured by the RRC signaling procedure or the broadcast RRC signaling procedure.

Next, a side link communication method will be described. Even when describing a method (e.g., transmission or reception of a signal) performed at a first communication node among the communication nodes, the corresponding second communication node may perform a method (e.g., reception or transmission of a signal) corresponding to the method performed at the first communication node. That is, when describing the operation of ue#1 (e.g., vehicle#1), ue#2 (e.g., vehicle#2) corresponding thereto may perform the operation corresponding to the operation of ue#1. Conversely, when describing the operation of ue#2, the corresponding ue#1 may perform an operation corresponding to the operation of ue#2. In the exemplary embodiments described below, the operation of the vehicle may be the operation of a communication node located in the vehicle.

In an exemplary embodiment, the signaling may be one or a combination of two or more of higher layer signaling, MAC signaling, and Physical (PHY) signaling. The message for higher layer signaling may be referred to as a "higher layer message" or "higher layer signaling message". The message used for MAC signaling may be referred to as a "MAC message" or a "MAC signaling message. The message for PHY signaling may be referred to as a "PHY message" or a "PHY signaling message. Higher layer signaling may refer to operations to send and receive system information (e.g., master information block (Master Information Block, MIB), system information block (System Information Block, SIB)) and/or RRC messages. MAC signaling may refer to the operation of transmitting and receiving a MAC Control Element (CE). PHY signaling may refer to an operation of transmitting and receiving control information (e.g., downlink control information (Downlink Control Information, DCI), uplink control information (Uplink Control Information, UCI), or SCI).

The side link signals may be synchronization signals and reference signals for side link communications. For example, the synchronization signal may be a synchronization signal/physical broadcast channel (SS/PBCH) block, a Side Link Synchronization Signal (SLSS), a primary side link synchronization signal (PSSS), a secondary side link synchronization signal (SSSS), or the like. The Reference signals may be channel state information Reference signals (Channel State Information-Reference signals, CSI-RS), DMRS, phase Tracking Reference signals (PT-RS), cell specific Reference signals (Cell Specific Reference Signal, CRS), sounding Reference signals (Sounding Reference Signal, SRS), discovery Reference signals (Discovery Reference Signal, DRS), etc.

The side link channels may be PSSCH, PSCCH, PSDCH, PSBCH, physical side link feedback channels (Physical Sidelink Feedback Channel, PSFCH), etc. In addition, a side-link channel may refer to a side-link channel that includes side-link signals mapped to particular resources in the corresponding side-link channel. The side link communication may support broadcast services, multicast services, and unicast services.

The side link communication may be performed based on a single SCI scheme or a multiple SCI scheme. When a single SCI scheme is used, it may be based on one SCI (e.g., stage 1 SCI (1 ^st -stage SCI)) to perform data transmission (e.g., side link data transmission, side link Shared Channel (SL-SCH) transmission). When using the multiple SCI scheme, two SCIs (e.g., a stage 1 SCI and a stage 2 SCI (2) ^nd -stage SCI)) to perform data transmission. SCI may be transmitted over PSCCH and/or pscsch. When a single SCI scheme is used, the SCI can be sent on the PSCCH (e.g.E.g., stage 1 SCI). When using the multi-SCI scheme, the stage 1 SCI may be transmitted on the PSCCH and the stage 2 SCI may be transmitted on the PSCCH or PSSCH. Stage 1 SCI may be referred to as a "first stage SCI" and stage 2 SCI may be referred to as a "second stage SCI". The format of the first stage SCI may include SCI format 1-a and the format of the second stage SCI may include SCI format 2-a and SCI format 2-B.

The first stage SCI may comprise one or more of the following information elements: priority information, frequency resource allocation information, time resource allocation information, resource reservation period information, demodulation reference signal (DMRS) pattern information, 2 nd stage SCI format information, beta_offset indicator, number of DMRS ports, and Modulation and Coding Scheme (MCS) information. The second stage SCI may include one or more of the following information elements: HARQ processor Identifier (ID), redundancy Version (RV), source ID, destination ID, CSI request information, region ID, and communication range requirement.

As shown in fig. 7, the partial listening operation may be configured by higher layer signaling of the base station. The transmitting terminal may determine one or more candidate resources by performing a partial listening operation within the listening window, and determine a transmitting resource among the one or more candidate resources by performing a selection operation within the selection window. The transmitting terminal may perform side-link communication with the receiving terminal using the transmission resources. In an exemplary embodiment, the transmitting terminal may be a terminal transmitting data (e.g., side link data), and the receiving terminal may be a terminal receiving data.

The selection window may be configured at time period [ n+T ] ₁ ，n+T ₂ ]And (3) inner part. The candidate resources may be configured in a particular subframe (e.g., subframe t _y ) Is a kind of medium. Subframe t _y Can refer to a start time t _y Is allocated to the frame of the frame. The candidate resources may be configured periodically. For example, the configuration period of the candidate resource may be 100 milliseconds (ms). The candidate resource may be the result of a partial listening operation performed in the listening window. The partial snoop operation may beTo be performed in a part of the listening window within the listening window, and the configuration period of the part of the listening window may be P _step 。

The length of the listening window may be 1000 milliseconds, and up to 10 partial listening windows may be configured within the listening window. The start time of each of the partial listening windows may be based on subframe t _y To determine. For example, the start time of each partial listening window may be a subframe t _y -k×P _step K may be set by higher layer signaling. The base station may transmit a bitmap (e.g., gapCandidateSensing) indicating k to the terminal (e.g., transmitting terminal and/or receiving terminal) using higher layer signaling. The bitmap may be 10 bits in size. When the bitmap is set to 1001000110, four partial listening windows may be configured within the listening window. The start time of the first partial listening window may be subframe t _y The start time of the second partial listening window may be sub-frame t-900 ms _y 800ms, the start time of the third partial listening window may be subframe t _y 400ms, and the start time of the fourth partial listening window may be subframe t _y -100ms. That is, when the bitmap is set to 1001000110, k may be 1, 4, 8, or 9. Here, P _step May be 100ms.

On the other hand, in the side link communication, a re-evaluation operation and/or a preemption operation may be performed. In addition, candidate resources and/or transmission resources may be aperiodically configured. May be a period of time (e.g., [ t ] _y -P _step ,t _y ]Or a period from the end time of the listening window to the start time of the selection window), and the resources may be selected by the re-evaluation operation and/or the preemption operation. Resources from the re-evaluation operation and/or the preemption operation may conflict with the transmission resources of the results of performing the selection operation within the selection window. When in period [ t _y -P _step ，t _y ]The above-described resource collision problem may occur when a listening window (e.g., a partial listening window) is not configured therein.

Fig. 8 is a sequence diagram showing a first exemplary embodiment of a method of configuring an additional part listening window in side link communication.

As shown in fig. 8, the communication system may include a base station, a transmitting terminal, and a receiving terminal. The base station may be the base station 210 shown in fig. 2, the transmitting terminal may be the terminal #5235 shown in fig. 2, and the receiving terminal may be the terminal #6 236 shown in fig. 2. Each of the base station, the transmitting terminal, and the receiving terminal may be configured the same as or similar to the communication node 300 shown in fig. 3. The transmitting terminal and the receiving terminal may support the protocol stacks shown in fig. 4 to 6.

The base station may generate configuration information of the additional part of the listening window and transmit a higher layer message (e.g., system information and/or RRC message) including the configuration information of the additional part of the listening window to the terminal (e.g., transmitting terminal and/or receiving terminal) (S801). The additional partial listening window may be configured independently of a partial listening window configured within the listening window (hereinafter referred to as an "existing partial listening window"). Can be in period t _y -P _step ，t _y ]The additional part of the listening window is configured within or within a period from an end time of the listening window to a start time of the selection window. t is t _y May be the start time of a candidate resource (e.g., a first candidate resource) within the selection window or the start time of a transmission resource (i.e., a selected resource). P (P) _step May be a configuration period of an existing partial listening window within the listening window. P may be replaced by another value _step And the base station may transmit a higher layer message including another value to the transmitting terminal and/or the receiving terminal. The configuration information of the additional part listening window may include one or more information elements defined in table 3 below.

TABLE 3

Gapcadence indicating the start time of an existing partial listening window may be used as a type 2-bitmap that indicates the start time of an additional partial listening window. When the bitmap indicating the start time of the additional partial listening window is referred to as a "type 2-bitmap", the bitmap indicating the start time of the existing partial listening window may be referred to as a "type 1-bitmap". The type 2-bitmap may include b bits. b may be a natural number. For example, b may be 2, 5, 10 or 20.

Alternatively, a separate parameter (e.g., add-gapcadence) may be configured for the type 2-bitmap indicating the start time of the partial listening window. add-gapcadence can be distinguished from gapcadence indicating the start time of an existing partial listening window.

The transmitting terminal may receive configuration information of the additional part listening window from the base station and may configure the additional part listening window based on the configuration information (S802). In an exemplary embodiment, the time resources (e.g., a listening window, an existing partial listening window, an additional partial listening window, and/or a selection window) may be configured in units of symbols (e.g., orthogonal Frequency Division Multiplexing (OFDM) symbols, orthogonal Frequency Division Multiple Access (OFDMA) symbols, single Carrier (SC) -Frequency Division Multiplexing (FDM) symbols, or SC-frequency division multiple access (SC-FDMA) symbols), small slots, subframes, transmission Time Intervals (TTIs), or absolute times (e.g., milliseconds or seconds).

The sending terminal may be based on type 2-bitmaps (e.g., gapcadence or add-gapcadence) and P _step-add To confirm the start time of the additional part listening window, and the additional part listening window may be configured based on the start time. Can be in period t _y -P _step ,t _y ]An additional part of the listening window is configured. When the type 2-bitmap is 1001000110, P _step 100 ms, P _step-add For 10ms, the transmitting terminal may transmit at time period t _y -100ms，t _y ]Four additional partial listening windows are configured. The start time of the first additional part listening window may be a subframe t _y The start time of the second additional part listening window may be sub-frame t, 90ms _y The start time of the third additional part listening window may be sub-frame t 80ms _y -40ms, the start time of the fourth additional part listening window may be subframe t _y -10ms。

P _step-add Can be set to be more than the P of the existing partial listening window _step Short. For example, P _step-add May be P _step /10. P may be received in step S801 _step-add And P _step Is a proportion of the number of the pieces of the information. P (P) _step-add May be set to be shorter than 10 ms. P may be determined based on the number of applications N of the type 2-bitmap _step-add 。P _step-add May be inversely proportional to the number of applications N. When the base station does not explicitly indicate P _step-add Such an operation can be employed at that time. N may be a natural number. For example, when the number of applications N is 2, P _step At 100ms, a type 2-bitmap may be applied to a first period (e.g., [ t ] _y -100ms，t _y -50ms]) And a second period (e.g., [ t ] _y -50ms，t _y ])。P _step-add Can be set to 10ms/N or (P) _step and/10)/N. Namely P _step-add May be 5ms. In each of the first period and the second period, the additional partial listening window may be configured with a period of 5ms.

For another example, when the number of applications N is 5, P _step At 100ms, a type 2-bitmap may be applied to a first period (e.g., [ t ] _y -100ms，t _y -80ms]) A second period of time (e.g., [ t ] _y -80ms，t _y -60ms]) A third period (e.g., [ t ] _y -60ms，t _y -40ms]) Fourth period (e.g., [ t ] _y -40ms，t _y -20ms]) And a fifth period (e.g., [ t ] _y -20ms，t _y ])。P _step-add Can be set to 10ms/N or (P) _step and/10)/N. Namely P _step-add May be 2ms. In each of the first to fifth periods, the additional partial listening window may be configured with a period of 2ms.

The number of applications N may be set for each resource pool or side chain service. The number of applications N may be set by PC5 RRC signaling between terminals (e.g., transmitting and/or receiving terminals).

As another method, the transmitting terminal may configure the additional partial listening window with some bits in the type 2-bitmap. For example, the transmitting terminal may utilizeM bits out of all b bits included in the type 2-bitmap. m may be a natural number less than b. Can be in period t _y -P _step ，t _y ]An additional part of the listening window is configured.

P when utilizing some bits in the type 2-bitmap _step-add May be set longer than 10 ms. For example, when using 5 Most Significant Bits (MSBs) or 5 Least Significant Bits (LSBs) in a type 2-bitmap, P _step-add May be 20ms. In this case, the transmitting terminal may configure the additional partial listening window with a period of 20ms. For another example, when 2 MSBs or 2 LSBs in the type 2-bitmap are utilized, P _step-add May be 50ms. In this case, the transmitting terminal may configure the additional partial listening window with a period of 50ms. In the above exemplary embodiment, P _step-add Can be set to (P) _step Type 2-number of bits used in the bitmap).

As another method, the transmitting terminal may configure the additional partial listening window based on a ratio of bits set to 0 and/or a ratio of bits set to 1 in the type 2-bitmap. For example, when P _step Is 100ms and the type 2-bitmap is set to 1001000110 (i.e., 4 of the 10 bits are set to 1), the transmitting terminal can at [ t _y -100ms，t _y ]T in time period _y A partial period after 100ms (e.g., [ t ] _y -100ms，ty-60ms]) Or t _y The previous partial period (e.g., [ t ] _y -40ms，t _y ]) An additional part of the listening window is configured. That is, the period [ t ] may be determined based on a ratio of a first value (e.g., 0) or a second value (e.g., 1) in the type 2-bitmap _y -100ms，t _y ]The size of the additional part listening window in. The transmitting terminal may continuously perform the partial listening operation for the above-described partial period.

P _step Or P _step-add May be set in association with other parameters (e.g., subcarrier spacing). For example, as shown in Table 4 below, P _step Or P _step-add May be associated (e.g., mapped) with a subcarrier spacing.

TABLE 4

μ	Δf＝2 ^μ ·15[kHz]	Cycle time
			0	15	P _step Or P _step-add
1	30	P _step /2 or P _step-add /2
			2	60	P _step /4 or P _step-add /4
3	120	P _step /8 or P _step-add /8
			4	240	P _step /16 or P _step-add /16

The information in table 4 (e.g., P may be transmitted in step S801 _step Or P _step-add Mapping information between and subcarrier spacing). Alternatively, a step separate from step S801 may be performedThe information in table 4 is sent. P may be set independently for each subcarrier spacing _step And P _step-add Each of which is formed by a pair of metal plates. For example, P may be set differently for each subcarrier spacing _step And P _step-add Each of which is formed by a pair of metal plates. According to the above-described exemplary embodiments, the additional part listening window may be configured as follows.

As shown in fig. 9, the time period t may be _y -P _step ,t _y ]An additional listening window is configured. t is t _y May be the start time of a candidate resource (e.g., a first candidate resource) within the selection window or the start time of a transmission resource (i.e., a selected resource). P (P) _step May be 100ms. Alternatively, not only at [ t ] _y -P _step ，t _y ]The additional partial listening window is configured in other periods (e.g., the entire period or a partial period of the listening window, or a period from the end time of the listening period to the start time of the selected period).

Referring again to fig. 8, the transmitting terminal may perform a listening operation (e.g., a full listening operation or a partial listening operation) within the listening window to transmit data (e.g., side link data) to the receiving terminal (S803). Step S803 may be performed before or after step S802. The transmitting terminal may determine one or more candidate resources by performing a listening operation. Before performing a selection operation on one or more candidate resources in the selection window, the transmitting terminal may perform a partial listening operation in the additional partial listening window configured in step S802 (S804). In step S804, the transmitting terminal may confirm the existence of the resource selected by the re-evaluation operation and/or the preemption operation by performing a partial listening operation. That is, the transmitting terminal may confirm the occupancy state of at least one of the one or more candidate resources determined by the listening operation (e.g., whether there are candidate resources selected by the re-evaluation operation and/or the preemption operation).

The transmission terminal may select a transmission resource by performing a selection operation within a selection window in consideration of the result of step S804 (S805). The transmitting terminal may select a transmission resource from among one or more candidate resources, from among candidate resources excluding resources used by other terminals (e.g., resources selected by the re-evaluation operation and/or the preemption operation). That is, the occupied resource determined in step S804 may not be selected as the transmission resource. The transmitting terminal may transmit data to the receiving terminal using the selected transmission resource (S806). The receiving terminal may receive data from the transmitting terminal.

On the other hand, in consideration of a power saving operation based on a random resource selection operation and/or a partial listening operation, an area performing the random resource selection operation and an area performing the partial listening operation may be differently configured within the resource pool. Higher layer parameters (e.g., gapcandeatesensing) may be used to support the above operations. The region in which the random resource selection operation is performed and the region in which the partial snoop operation is performed may be configured according to the value of gapcandatesensing. In this case, a window indicated by gapcandidetesensing within the same resource pool may be used for both random resource selection operations and partial listening operations. That is, it can be assumed that both the random resource selection operation and the partial listening operation are performed in the above-described resource pool. In addition, it may be assumed that a terminal using the above-described resource pool performs both a random resource selection operation and a partial listening operation.

As shown in fig. 10, when gapcandatesensing is set to 0000100101, a partial snoop operation may not be performed in an area corresponding to a bit set to 0. That is, the random resource selection operation may be performed in an area corresponding to the bit set to 0. Accordingly, the region corresponding to the bit set to 0 may be a region in which the random resource selection operation is performed. The area other than the area performing the random resource selection operation among the entire areas may be an area performing a partial listening operation. The area in which the partial snoop operation is performed may be an area corresponding to a bit set to 1.

The above-described exemplary embodiments, the above-described configuration, whether the above-described configuration is applied, the above-described condition is applied, whether the above-described condition is applied, the above-described parameters are applied, or whether each of the above-described parameters is applied, may be independently configured according to at least one of a resource pool, a service type, a priority, a performance state of a power saving operation, a quality of service (QoS) parameter (e.g., reliability, delay), and/or a terminal type (e.g., vehicle (V) -UE or pedestrian (P) -UE) through system information, RRC message, MAC CE, control information, or PC5 signaling message. Each of the above-described configuration and the above-described parameters may be implicitly indicated based on the pre-configured parameters.

The exemplary embodiments of the present disclosure may be implemented as program instructions executable by various computers and recorded on computer-readable media. The computer readable medium may include program instructions, data files, data structures, or combinations thereof. The program instructions recorded on the computer-readable medium may be designed and configured for the purposes of this disclosure or may be well known and available to those having ordinary skill in the computer software arts.

Examples of computer readable media may include specific hardware devices, such as ROM, RAM, and flash memory, configured to store and execute program instructions. Examples of program instructions include both machine code, such as produced by a compiler, and high-level language code that may be executed by the computer using an interpreter. The hardware apparatus described above may be configured to operate with at least one software module to perform embodiments of the present disclosure, and vice versa.

Although exemplary embodiments of the present disclosure have been described in detail, it should be understood that various modifications and alterations can be made to the present invention by those having ordinary skill in the art to which the present invention pertains without departing from the spirit and scope of the present disclosure as set forth in the appended claims.

Claims

1. A method of operating a transmitting terminal in a communication system, the method of operating comprising:

receiving configuration information of an additional part of the listening window from the base station;

determining one or more candidate resources by performing a listening operation in a listening window;

confirming an occupancy state of at least one candidate resource among the one or more candidate resources by performing a partial listening operation in the additional partial listening window configured according to the configuration information;

determining, within a selection window, a first candidate resource of the one or more candidate resources as a transmission resource by taking into account the occupancy state; and

and performing side link communication with the receiving terminal by using the transmission resource.

2. The method of operation of claim 1, wherein, during a period [ t ] _y -P _step ,t _y ]Internally configuring the additional partial listening window, where t _y Is the start time, P, of a particular candidate resource within the selection window _step Is the configuration period of the existing additional part of the listening window within the listening window.

3. The operating method of claim 2, wherein a configuration period of the additional partial listening window is set to be P-th _step Short.

4. The method of operation of claim 1, wherein the configuration information comprises at least one of: a type 2-bitmap indicating a start time of the additional partial listening window, information indicating the number of times the type 2-bitmap is applied, a configuration period of the additional partial listening window, information of a proportion of the configuration period, and an enable indicator indicating whether to configure the additional partial listening window.

5. The operation method of claim 4, wherein when the number of times the type 2-bitmap is applied is N, a period [ t ] of the additional partial listening window is configured _y -P _step ,t _y ]Is divided into N time periods, and the type 2-bitmap is applied in the N time periodsN is a natural number.

6. The operating method of claim 4, wherein a configuration period of the additional partial listening window is inversely proportional to the number of times the type 2-bitmap is applied.

7. The operating method of claim 4, wherein the size of the additional partial listening window is determined according to a ratio of a first value or a second value in the type 2-bitmap.

8. The operating method of claim 1, wherein a configuration period of the additional partial listening window is differently set for each subcarrier spacing.

9. The method of operation of claim 1, wherein a candidate resource of the one or more candidate resources occupied by other terminals is not determined as the transmission resource.

10. The method of operation of claim 9, wherein the occupied candidate resource is a resource selected by a re-evaluation operation or a preemption operation.

11. A transmitting terminal, which is a transmitting terminal in a communication system, the transmitting terminal comprising:

a processor; and

a memory storing one or more instructions for execution by the processor,

wherein the one or more instructions are operable to:

12. The transmitting terminal of claim 11, wherein, during a period [ t ] _y -P _step ,t _y ]Internally configuring the additional partial listening window, where t _y Is the start time, P, of a particular candidate resource within the selection window _step Is a configuration period of an existing additional partial listening window within the listening window, and the configuration period of the additional partial listening window is set to be less than P _step Short.

13. The transmitting terminal of claim 11, wherein the configuration information comprises at least one of: a type 2-bitmap indicating a start time of the additional partial listening window, information indicating the number of times the type 2-bitmap is applied, a configuration period of the additional partial listening window, information of a proportion of the configuration period, and an enable indicator indicating whether to configure the additional partial listening window.

14. The transmitting terminal of claim 13, wherein the period [ t ] of the additional partial listening window is configured when the number of times the type 2-bitmap is applied is N _y -P _step ,t _y ]Is divided into N periods, and the type 2-bitmap is applied to each of the N periods, N being a natural number.

15. The transmitting terminal of claim 13, wherein the size of the additional partial listening window is determined according to a ratio of a first value or a second value in the type 2-bitmap.

16. The transmission terminal of claim 11, wherein a configuration period of the additional partial listening window is differently set for each subcarrier spacing.

17. The transmitting terminal of claim 11, wherein a candidate resource occupied by other terminals among the one or more candidate resources is not determined as the transmitting resource, and the occupied candidate resource is a resource selected through a re-evaluation operation or a preemption operation.