WO2022235082A1 - 무선 통신 시스템에서 비선호 자원의 결정을 위한 방법 및 그 장치 - Google Patents
무선 통신 시스템에서 비선호 자원의 결정을 위한 방법 및 그 장치 Download PDFInfo
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- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
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Definitions
- the present specification relates to a method and an apparatus for determining a non-preferred resource in a wireless communication system.
- a wireless communication system is a multiple access system that supports communication with multiple users by sharing available system resources (eg, bandwidth, transmission power, etc.).
- Examples of the multiple access system include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, an orthogonal frequency division multiple access (OFDMA) system, and a single carrier frequency (SC-FDMA) system.
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency
- a sidelink refers to a communication method in which a direct link is established between user equipment (UE), and voice or data is directly exchanged between terminals without going through a base station (BS).
- SL is being considered as one way to solve the burden of the base station due to the rapidly increasing data traffic.
- V2X vehicle-to-everything refers to a communication technology that exchanges information with other vehicles, pedestrians, and infrastructure-built objects through wired/wireless communication.
- V2X can be divided into four types: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P).
- V2X communication may be provided through a PC5 interface and/or a Uu interface.
- next-generation radio access technology in consideration of the above may be referred to as a new radio access technology (RAT) or a new radio (NR).
- RAT new radio access technology
- NR new radio
- V2X vehicle-to-everything
- UE-A may provide UE-B with a resource set that can be used for the resource (re)selection procedure of UE-B.
- UE-A may provide UE-B with resource collision related information for a resource indicated by SCI (Sidelink Control Information) of UE-B.
- SCI Seglink Control Information
- the UE-B may avoid resource collision by reselecting some of the resources indicated by the UE-B's SCI.
- the resource set that can be used for the resource (re)selection procedure of the UE-B may include preferred resources and/or non-preferred resources.
- UE-A may determine a preferred resource or a non-preferred resource using its sensing result.
- the non-preferred resource In determining the non-preferred resource related to the method 1, the following may be considered.
- the non-preferred resource may be one of the resources considered by UE-B (even if there is no indication of UE-A) for the resource (re)selection procedure.
- the degree to which the UE-B's resource (re)selection procedure is improved may be relatively low.
- the present specification aims to propose a method for determining a non-preferred resource having effectiveness as inter-terminal coordination information.
- a method for a first terminal to determine a non-preferred resource in a wireless communication system is a demodulation reference signal (PSCCH DeModulation Reference) for a Physical Sidelink Control Channel (PSCCH) from a third terminal Receiving Signal, PSCCH DMRS), receiving the PSCCH from the third terminal, and a demodulation reference signal (PSSCH DMRS) for a Physical Sidelink Shared Channel (PSSCH) from the third terminal Determining a non-preferred resource related to transmission of a second terminal based on a measurement for at least one of the receiving and the PSCCH DMRS and/or the PSSCH DMRS and the second terminal and transmitting coordination information indicating the non-preferred resource.
- PSCCH DeModulation Reference for a Physical Sidelink Control Channel (PSCCH) from a third terminal Receiving Signal, PSCCH DMRS
- PSSCH DMRS Physical Sidelink Shared Channel
- the adjustment information is transmitted through a physical sidelink shared channel (PSSCH).
- PSSCH physical sidelink shared channel
- One or more resources are determined based on Sidelink Control Information (SCI) related to the PSCCH.
- SCI Sidelink Control Information
- the one or more resources are characterized in that the non-preferred resource is determined based on i) a reference signal received power (RSRP) based on the measurement and ii) one or more RSRP thresholds.
- RSRP reference signal received power
- the one or more RSRP thresholds may include a first RSRP threshold and a second RSRP threshold.
- the one or more resources may be determined as the non-preferred resource based on the RSRP and the second RSRP threshold.
- the one or more resources may be determined as the non-preferred resource.
- the one or more resources may be determined as the non-preferred resource based on the RSRP and the first RSRP threshold.
- the one or more resources may be determined as the non-preferred resource.
- Information on the RSRP threshold for determining the non-preferred resource may be preset or configured from the base station.
- the first RSRP threshold or the second RSRP threshold may be determined based on a value of a priority field included in the SCI.
- the transmission of the adjustment information may be triggered based on i) a predefined condition or ii) a request related to the adjustment information.
- the adjustment information may be based on a second stage SCI (second stage SCI) or a Medium Access Control-Control Element (MAC-CE).
- second stage SCI second stage SCI
- MAC-CE Medium Access Control-Control Element
- the SCI may be received before a predefined time, and the predefined time may be determined based on a transmission time of the adjustment information and a processing time of the first terminal.
- a first terminal for determining a non-preferred resource in a wireless communication system includes one or more transceivers, one or more processors controlling the one or more transceivers, and one or more operatively connected to the one or more processors. including memories.
- the one or more memories store instructions for performing operations based on being executed by the one or more processors.
- the operations include receiving a demodulation reference signal (PSCCH DeModulation Reference Signal, PSCCH DMRS) for a Physical Sidelink Control Channel (PSCCH) from a third terminal, receiving the PSCCH from the third terminal , receiving a demodulation reference signal (PSSCH DMRS) for a physical sidelink shared channel (PSSCH) from the third terminal, at least one of the PSCCH DMRS and/or the PSSCH DMRS measurement (measurement) ) based on determining a non-preferred resource related to transmission of a second terminal and transmitting coordination information indicating the non-preferred resource to the second terminal.
- PSCCH DeModulation Reference Signal PSCCH DeModulation Reference Signal
- PSSCH DMRS Physical Sidelink Control Channel
- the adjustment information is transmitted through a physical sidelink shared channel (PSSCH).
- PSSCH physical sidelink shared channel
- One or more resources are determined based on Sidelink Control Information (SCI) related to the PSCCH.
- SCI Sidelink Control Information
- the one or more resources are characterized in that the non-preferred resource is determined based on i) a reference signal received power (RSRP) based on the measurement and ii) one or more RSRP thresholds.
- RSRP reference signal received power
- An apparatus for controlling a first terminal to determine a non-preferred resource in a wireless communication system includes one or more processors and one or more memories operatively connected to the one or more processors.
- the one or more memories store instructions for performing operations based on being executed by the one or more processors.
- the operations include receiving a demodulation reference signal (PSCCH DeModulation Reference Signal, PSCCH DMRS) for a Physical Sidelink Control Channel (PSCCH) from a third terminal, receiving the PSCCH from the third terminal , receiving a demodulation reference signal (PSSCH DMRS) for a physical sidelink shared channel (PSSCH) from the third terminal, at least one of the PSCCH DMRS and/or the PSSCH DMRS measurement (measurement) ) based on determining a non-preferred resource related to transmission of a second terminal and transmitting coordination information indicating the non-preferred resource to the second terminal.
- PSCCH DeModulation Reference Signal PSCCH DeModulation Reference Signal
- PSSCH DMRS Physical Sidelink Control Channel
- the adjustment information is transmitted through a physical sidelink shared channel (PSSCH).
- PSSCH physical sidelink shared channel
- One or more resources are determined based on Sidelink Control Information (SCI) related to the PSCCH.
- SCI Sidelink Control Information
- the one or more resources are characterized in that the non-preferred resource is determined based on i) a reference signal received power (RSRP) based on the measurement and ii) one or more RSRP thresholds.
- RSRP reference signal received power
- One or more non-transitory computer-readable media store one or more instructions.
- the one or more instructions perform operations based on being executed by one or more processors.
- the operations include receiving a demodulation reference signal (PSCCH DeModulation Reference Signal, PSCCH DMRS) for a Physical Sidelink Control Channel (PSCCH) from a third terminal, receiving the PSCCH from the third terminal , receiving a demodulation reference signal (PSSCH DMRS) for a physical sidelink shared channel (PSSCH) from the third terminal, at least one of the PSCCH DMRS and/or the PSSCH DMRS measurement (measurement) ) based on determining a non-preferred resource related to transmission of a second terminal and transmitting coordination information indicating the non-preferred resource to the second terminal.
- PSCCH DeModulation Reference Signal PSCCH DeModulation Reference Signal
- PSSCH DMRS Physical Sidelink Control Channel
- the adjustment information is transmitted through a physical sidelink shared channel (PSSCH).
- PSSCH physical sidelink shared channel
- One or more resources are determined based on Sidelink Control Information (SCI) related to the PSCCH.
- SCI Sidelink Control Information
- the one or more resources are characterized in that the non-preferred resource is determined based on i) a reference signal received power (RSRP) based on the measurement and ii) one or more RSRP thresholds.
- RSRP reference signal received power
- a method for a second terminal to receive coordination information in a wireless communication system includes receiving the coordination information from a first terminal.
- the adjustment information indicates a non-preferred resource related to the transmission of the second terminal.
- the non-preferred resource is at least one of a demodulation reference signal (PSCCH DMRS) for a physical sidelink control channel (PSCCH) and/or a demodulation reference signal (PSSCH DMRS) for a physical sidelink shared channel (PSSCH) Measurement (measurement) is determined based on
- the PSCCH DMRS and the PSSCH DMRS are transmitted from the third terminal to the first terminal, and one or more resources are determined based on sidelink control information (SCI) related to the PSCCH.
- the one or more resources are characterized in that the non-preferred resource is determined based on i) a reference signal received power (RSRP) based on the measurement and ii) one or more RSRP thresholds.
- RSRP reference signal received power
- the adjustment information may be received through a physical sidelink shared channel (PSSCH).
- PSSCH physical sidelink shared channel
- the adjustment information may be based on a second stage SCI (second stage SCI) or a Medium Access Control-Control Element (MAC-CE).
- second stage SCI second stage SCI
- MAC-CE Medium Access Control-Control Element
- a second terminal for receiving coordination information in a wireless communication system may operate on one or more transceivers, one or more processors controlling the one or more transceivers, and the one or more processors one or more memories connected to each other.
- the one or more memories store instructions for performing operations based on being executed by the one or more processors.
- the operations include receiving the adjustment information from a first terminal.
- the adjustment information indicates a non-preferred resource related to the transmission of the second terminal.
- the non-preferred resource is at least one of a demodulation reference signal (PSCCH DMRS) for a physical sidelink control channel (PSCCH) and/or a demodulation reference signal (PSSCH DMRS) for a physical sidelink shared channel (PSSCH) Measurement (measurement) is determined based on
- the PSCCH DMRS and the PSSCH DMRS are transmitted from the third terminal to the first terminal, and one or more resources are determined based on sidelink control information (SCI) related to the PSCCH.
- the one or more resources are characterized in that the non-preferred resource is determined based on i) a reference signal received power (RSRP) based on the measurement and ii) one or more RSRP thresholds.
- RSRP reference signal received power
- the non-preferred resource related to the transmission of the second terminal is determined based on the RSRP and one or more RSRP thresholds for at least one of the PSCCH DMRS and/or the PSSCH DMRS received from the third terminal. . Accordingly, based on one or more predefined thresholds, a non-preferred resource having effectiveness as adjustment information for resource (re)selection of UE-B may be determined.
- the one or more thresholds may include a first RSRP threshold and a second RSRP threshold.
- the second RSRP threshold may be utilized based on that the receiving terminal associated with one or more resources is the first terminal. Specifically, the one or more resources may be determined as the non-preferred resource based on the RSRP measured in relation to the one or more resources is lower than the second RSRP threshold. 2) Based on that the receiving terminal is different from the first terminal, the first RSRP threshold may be utilized. The one or more resources may be determined as the non-preferred resource based on the RSRP measured in relation to the one or more resources is greater than a first RSRP threshold.
- the criterion for determining the non-preferred resource is set separately from a case in which UE-A is a receiving terminal and a case in which it is not, not only the transmission of UE-B but also the reception of UE-A (that is, transmission of a UE other than UE-B) reliability can be improved.
- FIG. 1 shows the structure of an NR system according to an embodiment of the present specification.
- FIG. 2 shows the structure of an NR radio frame according to an embodiment of the present specification.
- FIG 3 shows a slot structure of an NR frame according to an embodiment of the present specification.
- FIG. 4 shows a terminal performing V2X or SL communication, according to an embodiment of the present specification.
- FIG. 5 shows a resource unit for V2X or SL communication, according to an embodiment of the present specification.
- FIG. 6 illustrates a procedure for a terminal to perform V2X or SL communication according to a transmission mode, according to an embodiment of the present specification.
- FIG. 8 shows a plurality of BWPs according to an embodiment of the present specification.
- FIG 9 shows a BWP according to an embodiment of the present specification.
- FIG. 10 illustrates a resource unit for CBR measurement according to an embodiment of the present specification.
- 11 is a diagram illustrating a resource pool related to CBR measurement.
- FIG. 12 illustrates a procedure for UE-A to transmit assistance information to UE-B according to an embodiment of the present specification.
- FIG. 13 is a flowchart illustrating a method for a first terminal to determine a non-preferred resource in a wireless communication system according to an embodiment of the present specification.
- FIG. 14 is a flowchart illustrating a method for a second terminal to receive adjustment information in a wireless communication system according to another embodiment of the present specification.
- 15 shows a communication system 1 according to an embodiment of the present specification.
- FIG. 16 illustrates a wireless device according to an embodiment of the present specification.
- FIG. 17 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present specification.
- FIG. 19 illustrates a portable device according to an embodiment of the present specification.
- FIG. 20 illustrates a vehicle or an autonomous driving vehicle according to an embodiment of the present specification.
- a or B (A or B) may mean “only A”, “only B”, or “both A and B”.
- a or B (A or B)” herein may be interpreted as “A and/or B (A and/or B)”.
- A, B or C(A, B or C) herein means “only A”, “only B”, “only C”, or “any and any combination of A, B and C ( any combination of A, B and C)”.
- a slash (/) or a comma (comma) may mean “and/or”.
- A/B may mean “A and/or B”. Accordingly, “A/B” may mean “only A”, “only B”, or “both A and B”.
- A, B, C may mean “A, B, or C”.
- At least one of A and B may mean “only A,” “only B,” or “both A and B.”
- the expression “at least one of A or B” or “at least one of A and/or B” means “at least one It can be interpreted the same as “A and B (at least one of A and B)”.
- At least one of A, B and C means “only A”, “only B”, “only C”, or “A, B and C” any combination of A, B and C”. Also, “at least one of A, B or C” or “at least one of A, B and/or C” means can mean “at least one of A, B and C”.
- parentheses used herein may mean “for example”.
- PDCCH control information
- PDCCH control information
- parentheses used herein may mean “for example”.
- PDCCH control information
- PDCCH control information
- CDMA code division multiple access
- FDMA frequency division multiple access
- TDMA time division multiple access
- OFDMA orthogonal frequency division multiple access
- SC-FDMA single carrier frequency division multiple access
- CDMA may be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000.
- TDMA may be implemented with a radio technology such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE).
- GSM global system for mobile communications
- GPRS general packet radio service
- EDGE enhanced data rates for GSM evolution
- OFDMA may be implemented with a wireless technology such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and evolved UTRA (E-UTRA).
- IEEE 802.16m is an evolution of IEEE 802.16e, and provides backward compatibility with a system based on IEEE 802.16e.
- UTRA is part of the universal mobile telecommunications system (UMTS).
- 3rd generation partnership project (3GPP) long term evolution (LTE) is a part of evolved UMTS (E-UMTS) that uses evolved-UMTS terrestrial radio access (E-UTRA), and employs OFDMA in the downlink and SC in the uplink.
- 3GPP 3rd generation partnership project
- LTE long term evolution
- E-UMTS evolved UMTS
- E-UTRA evolved-UMTS terrestrial radio access
- OFDMA OFDMA
- LTE-A (advanced) is an evolution of 3GPP LTE.
- 5G NR is a successor technology of LTE-A, and is a new clean-slate type mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, from low frequency bands below 1 GHz to intermediate frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) bands above 24 GHz.
- LTE-A or 5G NR is mainly described, but the technical idea according to an embodiment of the present specification is not limited thereto.
- FIG. 1 shows the structure of an NR system according to an embodiment of the present specification.
- a Next Generation-Radio Access Network may include a next generation-Node B (gNB) and/or an eNB that provides a UE with user plane and control plane protocol termination.
- gNB next generation-Node B
- eNB that provides a UE with user plane and control plane protocol termination.
- . 1 illustrates a case in which only gNBs are included.
- the gNB and the eNB are connected to each other through an Xn interface.
- the gNB and eNB are connected to the 5G Core Network (5GC) through the NG interface.
- 5GC 5G Core Network
- AMF access and mobility management function
- UPF user plane function
- FIG. 2 shows the structure of an NR radio frame according to an embodiment of the present specification.
- radio frames may be used in uplink and downlink transmission in NR.
- a radio frame has a length of 10 ms and may be defined as two 5 ms half-frames (HF).
- a half-frame may include 5 1ms subframes (Subframe, SF).
- a subframe may be divided into one or more slots, and the number of slots in a subframe may be determined according to a subcarrier spacing (SCS).
- SCS subcarrier spacing
- Each slot may include 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).
- CP cyclic prefix
- each slot may include 14 symbols.
- each slot may include 12 symbols.
- the symbol may include an OFDM symbol (or a CP-OFDM symbol), a single carrier-FDMA (SC-FDMA) symbol (or a Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM) symbol).
- Table 1 shows the number of symbols per slot (N slot symb ), the number of slots per frame (N frame,u slot ), and the number of slots per subframe (N subframe, u slot ).
- Table 2 illustrates the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to SCS when the extended CP is used.
- OFDM(A) numerology eg, SCS, CP length, etc.
- OFDM(A) numerology eg, SCS, CP length, etc.
- an (absolute time) interval of a time resource eg, a subframe, a slot, or a TTI
- a TU Time Unit
- multiple numerology or SCS to support various 5G services may be supported. For example, when SCS is 15 kHz, wide area in traditional cellular bands can be supported, and when SCS is 30 kHz/60 kHz, dense-urban, lower latency) and a wider carrier bandwidth may be supported. For SCS of 60 kHz or higher, bandwidths greater than 24.25 GHz may be supported to overcome phase noise.
- the NR frequency band may be defined as two types of frequency ranges.
- the two types of frequency ranges may be FR1 and FR2.
- the numerical value of the frequency range may be changed, for example, the two types of frequency ranges may be as shown in Table 3 below.
- FR1 may mean "sub 6GHz range”
- FR2 may mean “above 6GHz range”
- mmW millimeter wave
- FR1 may include a band of 410 MHz to 7125 MHz as shown in Table 4 below. That is, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or more. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) included in FR1 may include an unlicensed band. The unlicensed band may be used for various purposes, for example, for communication for a vehicle (eg, autonomous driving).
- FIG 3 shows a slot structure of an NR frame according to an embodiment of the present specification.
- a slot includes a plurality of symbols in the time domain.
- one slot may include 14 symbols, but in the case of an extended CP, one slot may include 12 symbols.
- one slot may include 7 symbols, but in the case of an extended CP, one slot may include 6 symbols.
- a carrier wave includes a plurality of subcarriers in the frequency domain.
- a resource block (RB) may be defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain.
- BWP Bandwidth Part
- P Physical Resource Block
- a carrier may include a maximum of N (eg, 5) BWPs. Data communication may be performed through the activated BWP.
- Each element may be referred to as a resource element (RE) in the resource grid, and one complex symbol may be mapped.
- RE resource element
- the air interface between the terminal and the terminal or the air interface between the terminal and the network may be composed of an L1 layer, an L2 layer, and an L3 layer.
- the L1 layer may mean a physical layer.
- the L2 layer may mean at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer.
- the L3 layer may mean an RRC layer.
- SLSS SL Synchronization Signal
- the SLSS is an SL-specific sequence, and may include a Primary Sidelink Synchronization Signal (PSSS) and a Secondary Sidelink Synchronization Signal (SSSS).
- PSSS Primary Sidelink Synchronization Signal
- SSSS Secondary Sidelink Synchronization Signal
- the PSSS may be referred to as a Sidelink Primary Synchronization Signal (S-PSS)
- S-SSS Sidelink Secondary Synchronization Signal
- S-SSS Sidelink Secondary Synchronization Signal
- length-127 M-sequences may be used for S-PSS
- length-127 Gold sequences may be used for S-SSS.
- the terminal may detect an initial signal using S-PSS and may obtain synchronization.
- the UE may acquire detailed synchronization using S-PSS and S-SSS, and may detect a synchronization signal ID.
- PSBCH Physical Sidelink Broadcast Channel
- PSBCH Physical Sidelink Broadcast Channel
- the basic information is information related to SLSS, duplex mode (Duplex Mode, DM), TDD UL/DL (Time Division Duplex Uplink/Downlink) configuration, resource pool related information, type of application related to SLSS, It may be a subframe offset, broadcast information, or the like.
- the payload size of PSBCH may be 56 bits including a CRC of 24 bits.
- S-PSS, S-SSS, and PSBCH may be included in a block format supporting periodic transmission (eg, SL SS (Synchronization Signal)/PSBCH block, hereinafter S-SSB (Sidelink-Synchronization Signal Block)).
- the S-SSB may have the same numerology (ie, SCS and CP length) as a Physical Sidelink Control Channel (PSCCH)/Physical Sidelink Shared Channel (PSSCH) in the carrier, and the transmission bandwidth is (pre)set SL BWP (Sidelink) BWP).
- the bandwidth of the S-SSB may be 11 resource blocks (RBs).
- the PSBCH may span 11 RBs.
- the frequency position of the S-SSB may be set (in advance). Therefore, the UE does not need to perform hypothesis detection in frequency to discover the S-SSB in the carrier.
- the transmitting terminal may transmit one or more S-SSBs to the receiving terminal within one S-SSB transmission period according to the SCS.
- the number of S-SSBs that the transmitting terminal transmits to the receiving terminal within one S-SSB transmission period may be pre-configured or configured in the transmitting terminal.
- the S-SSB transmission period may be 160 ms.
- an S-SSB transmission period of 160 ms may be supported.
- FIG. 4 shows a terminal performing V2X or SL communication, according to an embodiment of the present specification.
- terminal in V2X or SL communication may mainly refer to a user's terminal.
- the base station may also be regarded as a kind of terminal.
- terminal 1 may be the first apparatus 100
- terminal 2 may be the second apparatus 200 .
- UE 1 may select a resource unit corresponding to a specific resource from a resource pool indicating a set of a series of resources. And, UE 1 may transmit an SL signal using the resource unit.
- UE 2 which is a receiving terminal, may receive a resource pool configured for UE 1 to transmit a signal, and may detect a signal of UE 1 in the resource pool.
- the base station may inform the terminal 1 of the resource pool.
- another terminal informs the terminal 1 of the resource pool, or the terminal 1 may use a preset resource pool.
- the resource pool may be composed of a plurality of resource units, and each UE may select one or a plurality of resource units to use for its own SL signal transmission.
- FIG. 5 shows a resource unit for V2X or SL communication, according to an embodiment of the present specification.
- the total frequency resources of the resource pool may be divided into N F pieces, and the total time resources of the resource pool may be divided into N T pieces. Accordingly, a total of N F * N T resource units may be defined in the resource pool. 5 shows an example of a case in which the corresponding resource pool is repeated in a period of N T subframes.
- one resource unit (eg, Unit #0) may appear periodically and repeatedly.
- an index of a physical resource unit to which one logical resource unit is mapped may change in a predetermined pattern according to time.
- the resource pool may mean a set of resource units that a terminal desiring to transmit an SL signal can use for transmission.
- a resource pool can be subdivided into several types. For example, according to the content of the SL signal transmitted from each resource pool, the resource pool may be divided as follows.
- Scheduling assignment is a location of a resource used by a transmitting terminal for transmission of an SL data channel, MCS (Modulation and Coding Scheme) or MIMO (Multiple Input Multiple Output) required for demodulation of other data channels ) may be a signal including information such as a transmission method and TA (Timing Advance).
- SA may also be multiplexed and transmitted together with SL data on the same resource unit.
- the SA resource pool may mean a resource pool in which SA is multiplexed with SL data and transmitted.
- the SA may be referred to as an SL control channel.
- SL data channel Physical Sidelink Shared Channel, PSSCH
- PSSCH Physical Sidelink Shared Channel
- SL data channel may be a resource pool used by the transmitting terminal to transmit user data. If SA is multiplexed and transmitted together with SL data on the same resource unit, only the SL data channel of the form excluding SA information may be transmitted from the resource pool for the SL data channel. In other words, Resource Elements (REs) used to transmit SA information on individual resource units in the SA resource pool may still be used to transmit SL data in the resource pool of the SL data channel.
- the transmitting terminal may transmit the PSSCH by mapping the continuous PRB.
- the discovery channel may be a resource pool for the transmitting terminal to transmit information such as its ID. Through this, the transmitting terminal can allow the neighboring terminal to discover itself.
- the transmission timing determining method of the SL signal eg, whether it is transmitted at the reception time of the synchronization reference signal or whether it is transmitted by applying a predetermined timing advance at the reception time
- resource Allocation method for example, whether the base station designates the transmission resource of an individual signal to an individual transmission terminal or whether the individual transmission terminal selects an individual signal transmission resource by itself within the resource pool
- the signal format eg, each SL It may be divided into different resource pools again according to the number of symbols occupied by a signal in one subframe, or the number of subframes used for transmission of one SL signal
- the signal strength from the base station the transmission power strength of the SL terminal, and the like.
- FIG. 6 illustrates a procedure for a terminal to perform V2X or SL communication according to a transmission mode, according to an embodiment of the present specification.
- the transmission mode may be referred to as a mode or a resource allocation mode.
- a transmission mode in LTE may be referred to as an LTE transmission mode
- a transmission mode in NR may be referred to as an NR resource allocation mode.
- (a) of FIG. 6 shows a terminal operation related to LTE transmission mode 1 or LTE transmission mode 3.
- (a) of FIG. 6 shows a terminal operation related to NR resource allocation mode 1.
- LTE transmission mode 1 may be applied to general SL communication
- LTE transmission mode 3 may be applied to V2X communication.
- (b) of FIG. 6 shows a terminal operation related to LTE transmission mode 2 or LTE transmission mode 4.
- (b) of FIG. 6 shows a terminal operation related to NR resource allocation mode 2.
- the base station may schedule an SL resource to be used by the terminal for SL transmission.
- the base station may transmit information related to the SL resource and/or information related to the UL resource to the first terminal.
- the UL resource may include a PUCCH resource and/or a PUSCH resource.
- the UL resource may be a resource for reporting SL HARQ feedback to the base station.
- the first terminal may receive information related to a dynamic grant (DG) resource and/or information related to a configured grant (CG) resource from the base station.
- the CG resource may include a CG type 1 resource or a CG type 2 resource.
- the DG resource may be a resource configured/allocated by the base station to the first terminal through downlink control information (DCI).
- the CG resource may be a (periodic) resource configured/allocated by the base station to the first terminal through a DCI and/or RRC message.
- the base station may transmit an RRC message including information related to the CG resource to the first terminal.
- the base station may transmit an RRC message including information related to the CG resource to the first terminal, and the base station transmits DCI related to activation or release of the CG resource. It can be transmitted to the first terminal.
- the first terminal may transmit a PSCCH (eg, sidelink control information (SCI) or 1st-stage SCI) to the second terminal based on the resource scheduling.
- a PSCCH eg, sidelink control information (SCI) or 1st-stage SCI
- the first terminal may transmit a PSSCH (eg, 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second terminal.
- the first terminal may receive the PSFCH related to the PSCCH/PSSCH from the second terminal.
- HARQ feedback information eg, NACK information or ACK information
- the first terminal may transmit/report HARQ feedback information to the base station through PUCCH or PUSCH.
- the HARQ feedback information reported to the base station may be information generated by the first terminal based on HARQ feedback information received from the second terminal.
- the HARQ feedback information reported to the base station may be information generated by the first terminal based on a preset rule.
- the DCI may be a DCI for scheduling of an SL.
- the format of the DCI may be DCI format 3_0 or DCI format 3_1. Table 5 below shows an example of DCI for SL scheduling.
- the terminal can determine the SL transmission resource within the SL resource set by the base station / network or the preset SL resource.
- the configured SL resource or the preset SL resource may be a resource pool.
- the UE may autonomously select or schedule a resource for SL transmission.
- the terminal may perform SL communication by selecting a resource by itself within a set resource pool.
- the terminal may select a resource by itself within the selection window by performing a sensing (sensing) and resource (re)selection procedure.
- the sensing may be performed in units of subchannels.
- a first terminal that has selected a resource from the resource pool by itself may transmit a PSCCH (eg, sidelink control information (SCI) or 1st-stage SCI) to the second terminal using the resource.
- a PSCCH eg, sidelink control information (SCI) or 1st-stage SCI
- the first terminal may transmit a PSSCH (eg, 2nd-stage SCI, MAC PDU, data, etc.) related to the PSCCH to the second terminal.
- the first terminal may receive the PSFCH related to the PSCCH/PSSCH from the second terminal.
- a first terminal may transmit an SCI to a second terminal on a PSCCH.
- the first terminal may transmit two consecutive SCIs (eg, 2-stage SCI) to the second terminal on the PSCCH and/or the PSSCH.
- the second terminal may decode two consecutive SCIs (eg, 2-stage SCI) to receive the PSSCH from the first terminal.
- SCI transmitted on the PSCCH may be referred to as 1st SCI, 1st SCI, 1st-stage SCI or 1st-stage SCI format
- SCI transmitted on PSSCH is 2nd SCI, 2nd SCI, 2nd-stage SCI or It may be called a 2nd-stage SCI format
- the 1st-stage SCI format may include SCI format 1-A
- the 2nd-stage SCI format may include SCI format 2-A and/or SCI format 2-B.
- Table 6 below shows an example of the 1st-stage SCI format.
- Table 7 below shows an example of a 2 nd -stage SCI format.
- the first terminal may receive a PSFCH based on Table 8.
- the first terminal and the second terminal may determine the PSFCH resource based on Table 8, and the second terminal may transmit the HARQ feedback to the first terminal using the PSFCH resource.
- the first terminal may transmit SL HARQ feedback to the base station through PUCCH and/or PUSCH.
- SCI Sidelink Control Information
- Control information transmitted by the base station to the terminal through the PDCCH may be referred to as downlink control information (DCI), whereas control information transmitted by the terminal to another terminal through the PSCCH may be referred to as SCI.
- DCI downlink control information
- SCI control information transmitted by the terminal to another terminal through the PSCCH
- the UE may know the number of start symbols of the PSCCH and/or the number of symbols of the PSCCH.
- the SCI may include SL scheduling information.
- the UE may transmit at least one SCI to another UE to schedule the PSSCH.
- one or more SCI formats may be defined.
- the transmitting terminal may transmit the SCI to the receiving terminal on the PSCCH.
- the receiving terminal may decode one SCI to receive the PSSCH from the transmitting terminal.
- the transmitting terminal may transmit two consecutive SCIs (eg, 2-stage SCI) to the receiving terminal on the PSCCH and/or the PSSCH.
- the receiving terminal may decode two consecutive SCIs (eg, 2-stage SCI) to receive the PSSCH from the transmitting terminal.
- the SCI configuration fields are divided into two groups in consideration of a (relatively) high SCI payload size
- the SCI including the first SCI configuration field group is the first SCI or 1st SCI .
- the SCI including the second SCI configuration field group may be referred to as a second SCI or a 2nd SCI.
- the transmitting terminal may transmit the first SCI to the receiving terminal through the PSCCH.
- the transmitting terminal may transmit the second SCI to the receiving terminal on the PSCCH and/or the PSSCH.
- the second SCI may be transmitted to the receiving terminal through (independent) PSCCH, or may be piggybacked and transmitted together with data through PSSCH.
- two consecutive SCIs may be applied for different transmissions (eg, unicast, broadcast, or groupcast).
- the transmitting terminal since the transmitting terminal may transmit at least one of SCI, the first SCI and/or the second SCI to the receiving terminal through the PSCCH, the PSCCH is the SCI, the first SCI and/or the second SCI. 2 may be substituted/substituted with at least one of SCI. And/or, for example, the SCI may be replaced/substituted with at least one of the PSCCH, the first SCI, and/or the second SCI. And/or, for example, since the transmitting terminal may transmit the second SCI to the receiving terminal through the PSSCH, the PSSCH may be replaced/substituted with the second SCI.
- FIG. 7 shows three types of casts according to an embodiment of the present specification.
- FIG. 7(a) shows broadcast type SL communication
- FIG. 7(b) shows unicast type SL communication
- FIG. 7(c) shows groupcast type SL communication.
- the terminal may perform one-to-one communication with another terminal.
- the terminal may perform SL communication with one or more terminals in a group to which the terminal belongs.
- SL groupcast communication may be replaced with SL multicast communication, SL one-to-many communication, or the like.
- the transmitting terminal may need to establish a (PC5) RRC connection with the receiving terminal.
- the UE may acquire a V2X-specific SIB (V2X-specific SIB).
- V2X-specific SIB V2X-specific SIB
- the terminal which is set to transmit V2X or SL communication by the upper layer, at least the frequency that the terminal is set to transmit for SL communication is included in the V2X-specific SIB, the transmission resource pool for the frequency Without the inclusion of , the terminal may establish an RRC connection with another terminal. For example, when an RRC connection is established between the transmitting terminal and the receiving terminal, the transmitting terminal may perform unicast communication with the receiving terminal through the established RRC connection.
- the transmitting terminal may transmit an RRC message to the receiving terminal.
- the receiving terminal may perform antenna/resource demapping, demodulation, and decoding on the received information.
- Corresponding information may be delivered to the RRC layer through the MAC layer, the RLC layer, and the PDCP layer. Accordingly, the receiving terminal may receive the RRC message generated by the transmitting terminal.
- V2X or SL communication may be supported for a terminal in RRC_CONNECTED mode, a terminal in RRC_IDLE mode, and a terminal in (NR) RRC_INACTIVE mode. That is, the terminal of the RRC_CONNECTED mode, the terminal of the RRC_IDLE mode, and the terminal of the (NR) RRC_INACTIVE mode may perform V2X or SL communication.
- the UE in the RRC_INACTIVE mode or the UE in the RRC_IDLE mode may perform V2X or SL communication by using a cell-specific configuration included in the SIB specified for V2X.
- RRC may be used to exchange at least UE capability and AS layer configuration.
- the first terminal may transmit the UE capability and the AS layer configuration of the first terminal to the second terminal, and the first terminal may receive the UE capability and the AS layer configuration of the second terminal from the second terminal.
- the information flow may be triggered during or after PC5-S signaling for direct link setup.
- SL measurement and reporting between terminals may be considered in SL.
- the receiving terminal may receive a reference signal from the transmitting terminal, and the receiving terminal may measure a channel state for the transmitting terminal based on the reference signal.
- the receiving terminal may report channel state information (CSI) to the transmitting terminal.
- CSI channel state information
- SL-related measurement and reporting may include measurement and reporting of CBR, and reporting of location information.
- CSI Channel Status Information
- CQI Channel Quality Indicator
- PMI Precoding Matrix Index
- RI Rank Indicator
- RSRP Reference Signal Received Power
- RSRQ Reference Signal Received Quality
- path gain pathgain/pathloss
- SRS Sounding Reference Symbols
- Resource Indicator Resource Indicator
- CRI CSI-RS Resource Indicator
- interference condition vehicle motion, and the like.
- CQI, RI, and PMI or some of them may be supported in non-subband-based aperiodic CSI report assuming four or less antenna ports. have.
- the CSI procedure may not depend on a standalone RS.
- CSI reporting may be activated and deactivated according to settings.
- the transmitting terminal may transmit a CSI-RS to the receiving terminal, and the receiving terminal may measure CQI or RI by using the CSI-RS.
- the CSI-RS may be referred to as an SL CSI-RS.
- the CSI-RS may be confined within PSSCH transmission.
- the transmitting terminal may transmit the CSI-RS to the receiving terminal by including the CSI-RS on the PSSCH resource.
- HARQ Hybrid Automatic Repeat Request
- An error compensation scheme for securing communication reliability may include a Forward Error Correction (FEC) scheme and an Automatic Repeat Request (ARQ) scheme.
- FEC Forward Error Correction
- ARQ Automatic Repeat Request
- an error at the receiving end can be corrected by adding an extra error correction code to the information bits.
- the FEC method has advantages in that there is little time delay and no separate information exchanged between the transmitting and receiving ends is required, but there is a disadvantage in that the system efficiency is lowered in a good channel environment.
- the ARQ method can increase transmission reliability, but has a disadvantage in that a time delay occurs and system efficiency is lowered in a poor channel environment.
- the Hybrid Automatic Repeat Request (HARQ) method is a combination of FEC and ARQ, and the physical layer checks whether the received data contains an error that cannot be decoded, and when an error occurs, the performance can be improved by requesting retransmission.
- HARQ feedback and HARQ combining in the physical layer may be supported.
- the receiving terminal when the receiving terminal operates in resource allocation mode 1 or 2, the receiving terminal may receive a PSSCH from the transmitting terminal, and the receiving terminal may receive Sidelink Feedback Control Information (SFCI) through a Physical Sidelink Feedback Channel (PSFCH).
- SFCI Sidelink Feedback Control Information
- PSFCH Physical Sidelink Feedback Channel
- HARQ feedback for the PSSCH may be transmitted to the transmitting terminal using the format.
- SL HARQ feedback may be enabled for unicast.
- the receiving terminal in non-CBG (non-Code Block Group) operation, when the receiving terminal decodes the PSCCH targeting the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal HARQ-ACK may be generated. And, the receiving terminal may transmit the HARQ-ACK to the transmitting terminal.
- the receiving terminal after the receiving terminal decodes the PSCCH targeting the receiving terminal, if the receiving terminal does not successfully decode the transport block related to the PSCCH, the receiving terminal may generate a HARQ-NACK. And, the receiving terminal may transmit the HARQ-NACK to the transmitting terminal.
- SL HARQ feedback may be enabled for groupcast.
- two HARQ feedback options may be supported for groupcast.
- Groupcast option 1 After the receiving terminal decodes the PSCCH targeting the receiving terminal, if the receiving terminal fails to decode the transport block related to the PSCCH, the receiving terminal transmits the HARQ-NACK through the PSFCH It can be transmitted to the transmitting terminal. On the other hand, if the receiving terminal decodes the PSCCH targeting the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal may not transmit the HARQ-ACK to the transmitting terminal.
- (2) groupcast option 2 If the receiving terminal fails to decode the transport block related to the PSCCH after the receiving terminal decodes the PSCCH targeting the receiving terminal, the receiving terminal transmits the HARQ-NACK through the PSFCH It can be transmitted to the transmitting terminal. And, when the receiving terminal decodes the PSCCH targeted to the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal may transmit an HARQ-ACK to the transmitting terminal through the PSFCH.
- all terminals performing groupcast communication may share a PSFCH resource.
- terminals belonging to the same group may transmit HARQ feedback using the same PSFCH resource.
- each terminal performing groupcast communication may use different PSFCH resources for HARQ feedback transmission.
- terminals belonging to the same group may transmit HARQ feedback using different PSFCH resources.
- HARQ-ACK may be referred to as ACK, ACK information, or positive-ACK information
- HARQ-NACK may be referred to as NACK, NACK information, or negative-ACK information.
- the reception bandwidth and transmission bandwidth of the terminal need not be as large as the bandwidth of the cell, and the reception bandwidth and transmission bandwidth of the terminal may be adjusted.
- the network/base station may inform the terminal of bandwidth adjustment.
- the terminal may receive information/configuration for bandwidth adjustment from the network/base station.
- the terminal may perform bandwidth adjustment based on the received information/configuration.
- the bandwidth adjustment may include reducing/expanding the bandwidth, changing the location of the bandwidth, or changing the subcarrier spacing of the bandwidth.
- bandwidth may be reduced during periods of low activity to conserve power.
- the location of the bandwidth may shift in the frequency domain.
- the location of the bandwidth may be shifted in the frequency domain to increase scheduling flexibility.
- subcarrier spacing of the bandwidth may be changed.
- the subcarrier spacing of the bandwidth may be changed to allow for different services.
- a subset of the total cell bandwidth of a cell may be referred to as a BWP (Bandwidth Part).
- BA may be performed by the base station/network setting the BWP to the terminal, and notifying the terminal of the currently active BWP among the BWPs in which the base station/network is set.
- the BWP may be at least one of an active BWP, an initial BWP, and/or a default BWP.
- the UE may not monitor downlink radio link quality in a DL BWP other than an active DL BWP on a PCell (primary cell).
- the UE may not receive PDCCH, PDSCH, or CSI-RS (except for RRM) outside of the active DL BWP.
- the UE may not trigger CSI (Channel State Information) reporting for the inactive DL BWP.
- the UE may not transmit a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH) outside the active UL BWP.
- PUCCH Physical Uplink Control Channel
- PUSCH Physical Uplink Shared Channel
- the initial BWP may be given as a contiguous RB set for a maintaining minimum system information (RMSI) CORESET (control resource set) (set by PBCH).
- RMSI minimum system information
- the initial BWP may be given by a system information block (SIB) for a random access procedure.
- SIB system information block
- the default BWP may be set by a higher layer.
- the initial value of the default BWP may be the initial DL BWP.
- DCI downlink control information
- BWP may be defined for SL.
- the same SL BWP can be used for transmission and reception.
- the transmitting terminal may transmit an SL channel or an SL signal on a specific BWP
- the receiving terminal may receive an SL channel or an SL signal on the specific BWP.
- the SL BWP may be defined separately from the Uu BWP, and the SL BWP may have separate configuration signaling from the Uu BWP.
- the terminal may receive the configuration for the SL BWP from the base station / network.
- the SL BWP may be configured (in advance) for the out-of-coverage NR V2X terminal and the RRC_IDLE terminal within the carrier. For a UE in RRC_CONNECTED mode, at least one SL BWP may be activated in a carrier.
- FIG. 8 shows a plurality of BWPs according to an embodiment of the present specification.
- BWP1 having a bandwidth of 40 MHz and subcarrier spacing of 15 kHz
- BWP2 having a bandwidth of 10 MHz and subcarrier spacing of 15 kHz
- BWP3 having a bandwidth of 20 MHz and subcarrier spacing of 60 kHz
- FIG. 9 shows a BWP according to an embodiment of the present specification. In the embodiment of FIG. 9 , it is assumed that there are three BWPs.
- a common resource block may be a numbered carrier resource block from one end to the other end of a carrier band.
- the PRB may be a numbered resource block within each BWP.
- Point A may indicate a common reference point for a resource block grid (resource block grid).
- BWP may be set by a point A, an offset from the point A (N start BWP ), and a bandwidth (N size BWP ).
- the point A may be an external reference point of the PRB of the carrier to which subcarrier 0 of all neumatologies (eg, all neumatologies supported by the network in that carrier) is aligned.
- the offset may be the PRB spacing between point A and the lowest subcarrier in a given numerology.
- the bandwidth may be the number of PRBs in a given numerology.
- the BWP may be defined for SL.
- the same SL BWP can be used for transmission and reception.
- the transmitting terminal may transmit an SL channel or an SL signal on a specific BWP
- the receiving terminal may receive an SL channel or an SL signal on the specific BWP.
- the SL BWP may be defined separately from the Uu BWP, and the SL BWP may have separate configuration signaling from the Uu BWP.
- the terminal may receive the configuration for the SL BWP from the base station / network.
- the SL BWP may be configured (in advance) for the out-of-coverage NR V2X terminal and the RRC_IDLE terminal within the carrier. For a UE in RRC_CONNECTED mode, at least one SL BWP may be activated in a carrier.
- the resource pool may be a set of time-frequency resources that may be used for SL transmission and/or SL reception. From the viewpoint of the UE, time domain resources in the resource pool may not be contiguous.
- a plurality of resource pools may be (in advance) configured for the UE in one carrier. From the point of view of the physical layer, the UE may perform unicast, groupcast, and broadcast communication using a set or preset resource pool.
- SL congestion control sidelink congestion control
- the terminal When the terminal determines the SL transmission resource by itself, the terminal also determines the size and frequency of the resource used by the terminal by itself.
- the use of a resource size or frequency above a certain level may be restricted due to a constraint from a network or the like.
- overall performance may be greatly deteriorated due to mutual interference.
- the terminal needs to observe the channel condition. If it is determined that excessively many resources are being consumed, it is desirable for the terminal to take an action in the form of reducing its own resource use.
- this may be defined as congestion control (CR).
- the UE determines whether the energy measured in the unit time/frequency resource is above a certain level, and determines the amount and frequency of its transmission resource according to the ratio of the unit time/frequency resource in which the energy above the predetermined level is observed. can be adjusted
- a ratio of time/frequency resources in which energy of a certain level or higher is observed may be defined as a channel congestion ratio (CBR).
- CBR channel congestion ratio
- the UE may measure CBR for a channel/frequency. Additionally, the UE may transmit the measured CBR to the network/base station.
- FIG. 10 illustrates a resource unit for CBR measurement according to an embodiment of the present specification.
- the CBR is a result of the UE measuring a Received Signal Strength Indicator (RSSI) in units of subchannels for a specific period (eg, 100 ms). It may mean the number of channels. Alternatively, the CBR may mean a ratio of subchannels having a value greater than or equal to a preset threshold among subchannels during a specific period. For example, in the embodiment of FIG. 10 , if it is assumed that the hatched subchannels are subchannels having a value greater than or equal to a preset threshold, CBR may mean the ratio of the hatched subchannels during the 100ms period. Additionally, the terminal may report the CBR to the base station.
- RSSI Received Signal Strength Indicator
- 11 is a diagram illustrating a resource pool related to CBR measurement.
- the UE may perform one CBR measurement for one resource pool.
- the PSFCH resource may be excluded from the CBR measurement.
- the terminal may measure a channel occupancy ratio (CR). Specifically, the UE measures the CBR, and the UE measures the maximum value (CRlimitk) of the channel occupancy Ratio k (CRk) that can be occupied by traffic corresponding to each priority (eg, k) according to the CBR. ) can be determined. For example, the terminal may derive the maximum value (CRlimitk) of the channel occupancy for each traffic priority based on a predetermined table of CBR measurement values. For example, in the case of traffic having a relatively high priority, the terminal may derive a maximum value of a relatively large channel occupancy.
- CR channel occupancy ratio
- the terminal may perform congestion control by limiting the sum of the channel occupancy rates of traffic having a priority k of traffic lower than i to a predetermined value or less. According to this method, a stronger channel occupancy limit may be applied to traffic having a relatively low priority.
- the UE may perform SL congestion control by using methods such as adjusting the size of transmission power, dropping packets, determining whether to retransmit, and adjusting the size of the transmission RB (MCS adjustment).
- Table 10 shows an example of SL CBR and SL RSSI.
- the slot index may be based on a physical slot index.
- Table 11 shows an example of SL CR (Channel Occupancy Ratio).
- the wording "configure or define” may be interpreted as being (pre-) configured (via pre-defined signaling (eg, SIB, MAC signaling, RRC signaling)) from a base station or a network.
- pre-defined signaling eg, SIB, MAC signaling, RRC signaling
- “A may be configured” may include "that a base station or network (in advance) configures/defines or informs A for a terminal”.
- the wording "set or define” may be construed as being set or defined in advance by the system.
- “A may be set” may include "A is set/defined in advance by the system”.
- the base station may allocate a resource (hereinafter, SL resource) used for transmission and reception of an SL channel/signal to the terminal.
- SL resource a resource used for transmission and reception of an SL channel/signal to the terminal.
- the base station may transmit information related to the resource to the terminal.
- a method in which the base station allocates SL resources to the terminal may be referred to as a mode 1 method, a mode 1 operation, or a resource allocation mode 1.
- the UE may select an SL resource from within the resource pool based on sensing.
- a method for the UE to select an SL resource may be referred to as a mode 2 method, a mode 2 operation, or a resource allocation mode 2.
- the terminal may detect an SCI transmitted by another terminal, the terminal may identify a resource reserved by another terminal based on the SCI, and the terminal may measure RSRP can be obtained.
- the UE may select a resource to be used for SL transmission except for a specific resource within the resource selection window based on the above-described sensing result.
- the UE may refer to resource allocation information received through the first SCI.
- the amount of information that the UE can acquire on the first SCI may be limited.
- the second terminal may transmit additional auxiliary information.
- the first terminal may use the auxiliary information received from the second terminal to improve PSSCH detection performance and/or reduce a half-duplex limit and/or select a spare resource for transmission/reception of a specific signal.
- UE-A transmits auxiliary information to UE-B.
- UE-B selects a resource for PSCCH/PSSCH to be transmitted to UE-A and/or a resource for PSCCH/PSSCH to be transmitted to UE-C (ie, a third UE) based on the assistance information received from UE-A
- UE-C ie, a third UE
- FIG. 12 illustrates a procedure for UE-A to transmit assistance information to UE-B according to an embodiment of the present specification.
- the embodiment of FIG. 12 may be combined with various embodiments of the present specification.
- UE-A may transmit auxiliary information to UE-B.
- UE-B may select a resource for PSCCH/PSSCH to be transmitted to UE-A based on the assistance information received from UE-A, and UE-B may perform SL transmission using the resource.
- UE-B may select a resource for PSCCH/PSSCH to be transmitted to UE-C based on the assistance information received from UE-A, and UE-B may perform SL transmission using the resource.
- the auxiliary information may be referred to as additional information or coordination information.
- UE-A indicates to UE-B resource information that UE-A can perform sidelink reception from and/or resource information that cannot perform sidelink reception from UE-B. can do.
- UE-A is a preferred resource for PSCCH/PSSCH transmission (for UE-A or UE other than UE-A (eg, UE-C)) to UE-B. resource) and / or may indicate information about a non-preferred resource (non-preferred resource).
- the preferred resource or the non-preferred resource is a set of resources whose RSRP measurement value is below or below a certain level ((pre)set threshold) and/or above or above, based on the sensing result of UE-A.
- the preferred resource or non-preferred resource may be resource information that UE-C can properly receive or has a high detection probability when UE-B transmits PSCCH/PSSCH based on the SCI detected by UE-A. have.
- UE-A may indicate information on a resource in which a resource conflict occurs with respect to a selected resource and/or a reserved resource of UE-B.
- the resource collision occurs when a HALF-DUPLEX problem occurs between UE-B and a UE receiving a PSCCH/PSSCH transmitted by UE-B and/or UE-B's selection or selection of another UE with reserved resources
- it may be a case where the reserved resource overlaps with the frequency and/or time axis.
- UE-A when UE-A transmits adjustment information and UE-B selects a PSCCH/PSSCH resource to be transmitted to UE-A again based on the adjustment information, UE-A configures the adjustment information for UE-A may include information on sidelink transmission resources or time of day. Meanwhile, the sidelink transmission resource may be divided into a resource for initial transmission of UE-A and a retransmission resource for each initial transmission. In case of retransmission based on SL HARQ-ACK feedback, SL HARQ- for a corresponding TB When the ACK state is ACK, the retransmission reservation resource may not be used.
- whether SL HARQ-ACK feedback for TB transmission is activated or deactivated for the periodic reservation resource of UE-A may be different for each period.
- UE-A selects and/or reserve resources corresponding to initial transmission and retransmission to the UE. -Can be used when generating adjustment information to be transmitted to B.
- UE-A when SL HARQ-ACK feedback is activated for sidelink transmission for a target reserved resource, UE-A generates coordination information to transmit a selection resource and/or a reservation resource corresponding to the initial transmission to UE-B used, and retransmission resources may not be used.
- the UE-A transmits the initial transmission All or part of the selection resource and/or reservation resource corresponding to , and the retransmission reservation resource for the initial transmission may be used when generating adjustment information to be transmitted to the UE-B.
- the amount of retransmission reservation resources (the number of retransmission time points) to be used when generating the adjustment information may be set (in advance) for each congestion control level. In this case, for example, when the congestion control level is smaller than the (pre)set threshold, the selection resource and/or reservation resource corresponding to the initial transmission is used when generating coordination information to be transmitted to the UE-B, and the retransmission resource is It may be unused.
- the amount of retransmission reservation resources (the number of retransmission time points) to be used when generating the adjustment information may be configured through PC5-RRC.
- UE-A when SL HARQ-ACK feedback is activated for sidelink transmission for the target reserved resource, UE-A has a retransmission reservation resource equal to the number of retransmission resources actually used by UE-A in the previous period of the target reserved resource. and may be used when generating coordination information to transmit a selection resource and/or a reservation resource corresponding to the initial transmission to the UE-B.
- the previous period of the target reserved resource is based on statistics on the amount/number of retransmission resources actually used by UE-A in a plurality of periods. It may be to determine the number.
- UE-A uses the selected resource and/or reserved resource corresponding to the initial transmission when generating coordination information to transmit to UE-B and retransmission resources may not be used.
- UE-A uses the selected resource and/or reserved resource corresponding to the initial transmission and all retransmission reservation resources corresponding to the initial transmission Coordination information to be transmitted to the UE-B may be generated.
- the selection resource and/or the reservation resource corresponding to the initial transmission and retransmission resource are generated to the UE-B.
- a PSFCH resource is configured for a resource pool corresponding to a periodic reservation resource of UE-A
- a selection resource and/or a reservation resource corresponding to initial transmission are used when generating adjustment information to be transmitted to UE-B, and retransmission Resources may be unused.
- the resource when the adjustment information is a non-preferred resource, the resource may be included, and if the adjustment information is a preference resource, the resource may be avoided.
- the transmission/reservation resource at the late time point is not indicated through the SCI to be transmitted from the transmission/reservation resource at the early time point.
- the number of slots may be the number of slots belonging to the transmission resource pool of UE-A.
- UE-A's transmission/reservation resource that can be used to generate additional information may be limited to that UE-A does not indicate reservation information through SCI at another time point. have.
- the transmission reservation resource of UE-A is located in the first slot, the second slot, the third slot, and the fourth slot, and the difference between the start of the first slot and the start of the second slot is 31 or 32 or less, If the difference between the start of the second slot and the start of the third slot is more than 31 or 32, and the difference between the start of the third slot and the start of the fourth slot is 31 or 32 or less, UE-A transmits the first slot It may be to determine a preferred resource and/or a non-preferred resource for UE-B transmission by using the /reserved resource and the transmission/reserved resource of the third slot.
- UE-A may determine a reception preference and/or non-preferred resource/slot location of UE-A to UE-B by using the first transmission/reservation resource of each transmission reservation chain.
- the reserved resource of the second slot and the reserved resource of the fourth slot are that the location of the UE-B can be predicted from the SCI received from the UE-A in the first slot and the third slot, respectively.
- calculating the difference between slots may be counting slots belonging to the transmission resource pool of UE-A.
- UE-B may receive the adjustment information from UE-A and have a sensing-based result performed by UE-B itself.
- the UE-B may use the adjustment information and/or its own sensing result.
- an available resource set determined based on the sensing result it may be composed of a resource having a high interference level in the process of checking the available resource ratio.
- UE-B may not be able to secure a sufficient sensing result due to DRX operation or HALF-DUPLEX limitation.
- the UE-B may ignore/skip the sensing result of the UE-B in determining the PSCCH/PSSCH transmission resource.
- the boosting number and/or the comparison value for the RSRP threshold may be set (in advance) for each transmission priority value and/or reception priority value of the UE-B.
- checking whether the number of boosting and/or the RSRP threshold is greater than or equal to a specific value may be performed for each transmission priority value and/or reception priority value.
- the reserved resource of another terminal corresponding to the reception priority value is again an available resource set may be included in
- checking whether the number of boosting is equal to or greater than a specific value may be performed for each resource selection procedure. That is, for example, when boosting the RSRP threshold for a plurality of transmission priority/reception priority combinations, the total number of boosting may be added. Or, for example, when boosting application is determined, it may be performed with respect to the RSRP threshold for all transmission priority/reception priority combinations.
- UE-B may determine the PSCCH/PSSCH transmission resource using the adjustment information obtained from UE-A, and/or may determine the PSCCH/PSSCH transmission resource through random selection.
- UE-B may determine the PSCCH/PSSCH transmission resource using the adjustment information obtained from UE-A, and/or may determine the PSCCH/PSSCH transmission resource through random selection.
- a sensing slot is determined from an available resource slot of UE-B.
- an available resource slot without a sensing result and/or an incomplete sensing result When the number of available resource slots having (SCI not detected in some sensing slots) is less than a specific threshold, when the UE-B determines the PSCCH/PSSCH transmission resource, the sensing result of the available slots or the entire sensing result of the UE-B can be ignored/skipped.
- the specific threshold value may be a value set (in advance), or may be a minimum value for an available resource slot.
- the UE-B may ignore/skip the sensing result of the UE-B.
- UE-B may determine a PSCCH/PSSCH transmission resource by using the adjustment information obtained from UE-A and/or may determine a PSCCH/PSSCH transmission resource through random selection.
- the UE-B may ignore/skip the sensing result of UE-B in determining the PSCCH/PSSCH transmission resource. have.
- UE-B may ignore/skip a sensing result of UE-B when determining PSCCH/PSSCH transmission resources.
- UE-B may ignore/skip a sensing result of UE-B when determining PSCCH/PSSCH transmission resources.
- the UE-B is a Preserved (resource reservation period used for sensing) set and/or k value set for the PARTIAL SENSING operation (for which repetition of Preserved, information of deriving a sensing slot from an available slot) Therefore, it is possible to ignore/skip the sensing result of the UE-B.
- UE-B has a ratio of the number of sensing slots according to the PARTIAL SENSING setting to the total number of slots in the sensing window based on FULL SENSING. can ignore/skip the sensing result of
- UE-B has a ratio of the number of sensing slots that can be performed at the maximum (according to Preserved and/or k value setting) in PARTIAL SENSING to the number of sensing slots according to the PARTIAL SENSING setting (in advance). ) can ignore/skip the sensing result of the UE-B when it is less than or less than the set threshold. For example, in the above situation, when UE-B does not receive or acquire additional information VALID from UE-A at the time when resource (re)selection is triggered or within a (pre)set time interval therefrom, The resource (re)selection of UE-B may be performed based on the sensing result of UE-B.
- the threshold value is set for each priority value, and may be set differently according to a priority value of UE-B transmission.
- the relationship between the transmitting terminal and the terminal transmitting additional information that can be utilized for resource (re)selection of the transmitting terminal may be based on the following 1) or 2).
- the resource for PSCCH/PSSCH transmission determined by the transmitting terminal using the additional information may be used for transmission to the terminal that has transmitted the additional information.
- the resource for PSCCH/PSSCH transmission determined by the transmitting terminal using the additional information may be used for transmission to a terminal other than the terminal that transmitted the additional information (with or without the additional information transmitting terminal).
- the UE-B may ignore/skip all or part of the sensing result of the UE-B in selecting the PSCCH/PSSCH transmission resource.
- a part of the sensing result of the UE-B may be for a PSCCH/PSSCH resource transmitted by a terminal receiving adjustment information from the same UE-A and used to determine a transmission resource or determined based on the adjustment information.
- a terminal performing PARTIAL sensing and/or a terminal performing random selection and/or a terminal having limited sidelink transmission/reception may be introduced.
- PSCCH/PSSCH transmission is performed but sidelink reception is not performed, but UE type A, PSCCH/PSSCH and/or S-SSB transmission and PSFCH and/or S-SSB reception are performed, but the remaining sidelink reception is performed
- terminal type D it may be allowed to become a terminal (UE-A) that generates and transmits adjustment information to another terminal.
- a terminal performing resource (re)selection based on PARTIAL sensing is a sensing slot derived from an available resource slot determined by the terminal and/or a CONTINUOUS sensing window (resource selection window start or located in front of the first available resource slot) ), etc., may not perform sensing for the purpose of generating adjustment information other than a sensing slot for sensing and/or a slot expecting to receive sidelink data. That is, for example, a terminal performing resource (re)selection based on PARTIAL sensing generates adjustment information based on SCI obtained in a sensing slot and/or sidelink data reception slot for performing PARTIAL sensing.
- a terminal performing resource (re)selection based on PARTIAL sensing determines an area in which the terminal can receive a sidelink based on DRX operation or PARTIAL sensing slot information and provides it to UE-B.
- a terminal performing resource (re)selection based on PARTIAL sensing cannot select a resource corresponding to a slot other than the available resource slot determined by the terminal as a PSCCH / PSSCH transmission resource regardless of whether or not indicated in the coordination information.
- UE-B which performs resource (re)selection based on PARTIAL sensing, transmits all or part of information of available resource slots determined by the corresponding UE to UE-A as a request signal (that is, a signal for requesting the adjustment information) ) may be transmitted through
- UE-A may again indicate non-preferred resource information and/or preferred resource information for an available slot provided from the UE-B.
- a processing time T_proc,0 or T_0 (a value having T_proc,0 as an upper limit) may be required for the UE to generate sensing information. It may take a minimum processing time T_proc,1 or T_1 (a value having T_proc,1 as an upper limit) for the UE to perform resource (re)selection to determine the resource.
- T_proc,1 or T_1 a value having T_proc,1 as an upper limit
- reception SCI, reception DCI, and/or SL or UL transmission information that can be referenced to generate the adjustment information may be limited to those that are before a specific time from the slot n. have.
- the specific time point may be determined based on at least one of T_proc,0, T_0, T_proc,1, T_1, and/or PSSCH-to-PSFCH minimum timing value.
- the adjustment information may be transmitted in the form of a PSFCH format.
- the specific time may be determined as a time before T_proc,0 from slot n.
- the specific time point may be determined based on a value having T_proc,0, T_0, T_proc,0+T_proc,1, T_0+T_proc,1, T_0+T_1, or T_proc,0+T_proc,1 as an upper limit. have.
- the specific time may be determined as a time before T_0+T_proc,1 from slot n.
- the adjustment information may be transmitted through the PSCCH and/or the PSSCH.
- the first time point at which resource selection is possible is after a specific time point from the slot n can be limited to
- the specific time point is any one of PSFCH-to-PSSCH minimum timing (determined based on UE-B implementation as the sum of PSFCH detection/processing time and next PSCCH/PSSCH preparation time), T_proc,1, or T_1; It may be determined based on the sum of two or more. As a specific example, the specific time may be determined as a time when T_proc,1 has elapsed from the slot n.
- the adjustment information may be transmitted in a PSFCH format.
- the specific time point is any one of PSSCH-to-PSFCH minimum timing value, T_proc,1, T_1, PSCCH, or PSSCH processing type (UE-B is implementationally determined), or it can be determined based on the sum of two or more have.
- the specific time may be determined as a time when T_proc,1 has elapsed from the slot n.
- the adjustment information may be transmitted through a PSCCH (eg, 1st stage SCI) and/or PSSCH (eg, 2nd stage SCI).
- the specific Some of the resources after time may be selected.
- the adjustment information-based resource (re)selection procedure it is necessary to determine in what unit the adjustment information-based resource (re)selection procedure is determined or under which conditions a terminal capable of transmitting adjustment information and a terminal capable of utilizing adjustment information can be used. For example, whether a resource (re)selection procedure based on adjustment information is usable may be determined (in advance) for each resource pool.
- whether a resource (re)selection procedure based on adjustment information is usable may be set in a higher layer for each specific unit.
- the specific unit may be determined based on at least one of a congestion control level, a QoS parameter, a TB, a logical channel, and/or a MAC ENTITY.
- the terminal when the terminal performs resource (re)selection, for a logical channel that can use the adjustment information, it may be to select a resource pool available as the adjustment information from the resource pool selection and/or resource selection step. have.
- the UE may select a resource pool in which a PSFCH resource (for the purpose of adjustment information) is set in the resource pool selection step.
- UE-A when UE-A sends coordination information to UE-B after UE-B sends a request signaling to UE-A, UE-B has valid/existing SL data in a logical channel and/ Alternatively, when MAC ENTITY is selected to generate a SELECTED SIDELINK GRANT corresponding to single or multiple MAC PDU transmission, a request signal may be transmitted to UE-A. For example, UE-B receives from UE-A when SL data is valid/exists in a logical channel and/or after MAC ENTITY is selected to generate a SELECTED SIDELINK GRANT corresponding to single or multiple MAC PDU transmission. It may be using adjustment information.
- the request information (ie, the request for the adjustment information) is transmitted through SCI and/or PSSCH
- corresponding source ID, destination ID, cast type, priority value and/or HARQ- At least one of whether ACK is activated and an option therefor may be configured (in advance) or configured in a process of exchanging information between UE-B and UE-A.
- the source ID may be determined based on a source ID for transmission data and/or a destination ID for transmission data of the UE-B.
- the destination ID may be determined based on a source ID for transmission data and/or a destination ID for transmission data of the UE-B.
- UE-A may transmit additional information to UE-B according to whether a specific event occurs without receiving a request for additional information from UE-B.
- UE-A may not be provided with information related to the UE-B transmission from UE-B.
- UE-A may reuse information about the UE-B transmission obtained from the most recent request of UE-B when transmitting additional information based on event occurrence.
- UE-A may be configured (in advance) or arbitrarily select information on UE-B transmission to generate and transmit additional information to UE-B. In this case, when all or part of the parameters for UE-B transmission referenced by UE-A for generating additional information do not match the actual UE-B transmission, UE-B performs resource (re)selection. may ignore/skip the additional information.
- UE-A assumes the packet delay budget (PDB) and/or the end time of the resource selection window for UE-B transmission as a (pre)set value (eg, T_2,min) additional information can create For example, when the PDB for UE-B transmission does not match with the additional information transmitted by UE-A, UE-B may ignore/skip the additional information of UE-A.
- PDB packet delay budget
- pre preset value
- UE-B may ignore/skip additional information of UE-A.
- UE-B may ignore/skip additional information of UE-A when the number of subchannels for UE-B transmission is not the same for the additional information transmitted by UE-A, or when the value assumed by UE-A is large, or when the value assumed by UE-A is small UE-B may ignore/skip additional information of UE-A when the number of subchannels for UE-B transmission is not the same for the additional information transmitted by UE-A, or when the value assumed by UE-A is large, or when the value assumed by UE-A is small UE-B may ignore/skip additional information of UE-A when the number of subchannels for UE-B transmission is not the same for the additional information transmitted by UE-A, or when the value assumed by UE-A is large, or when the value assumed by UE-A is small UE-B may ignore/skip additional information of UE-A when the number of subchannels for UE-B transmission is not the same for the additional information transmitted by UE-A, or when the
- UE-B may ignore/skip additional information of UE-A when the resource reservation period for UE-B transmission is not the same for the additional information transmitted by UE-A, or when the value assumed by UE-A is large, or when the value assumed by UE-A is small Alternatively, when the value assumed by UE-A is not a multiple or a divisor of the resource reservation period of UE-B transmission, UE-B may ignore/skip additional information of UE-A.
- UE-A when UE-A provides UE-B with resource information preferred and/or unpreferred for UE-B transmission, UE-B's self-sensing operation of all or part of the indicated resource from the UE-B's point of view If it is recognized based on , it can be seen that the utility of transmitting the additional information (coordination information) of the UE-A is low.
- the preferred resource and/or non-preferred resource that UE-A provides to UE-B may include determining based on the non-preferred resource observed by UE-A although UE-B has not observed it.
- the resource may be reserved resource information obtainable from SCI transmitted at a time point at which the UE-B performs SL transmission and/or UL transmission or a time interval overlapping therewith.
- UE-A may derive SL reception unavailable slot information of UE-B based on the reserved resource obtained from SCI transmitted by UE-B,
- a non-preferred resource and/or a preferred resource for transmission of the UE-B may be determined based on the information on the SCI and/or the reserved resource indicated by the acquired SCI.
- the non-receivable slot of the UE-B may be limited to the initial transmission of the UE-B.
- UE-A classifies the UE based on the L1 or L2 source ID and/or the L1 or L2 destination ID of the SCI received from the UE-B, and identifies non-preferred resources and/or for each ID or ID combination. Alternatively, it may be to create a preferred resource.
- UE-PAIR is formed through PC5-RRC configuration with UE-A, and UE-A has a non-preferred resource for single or multiple source IDs and/or destination IDs of the UE-B. and/or creating a preferred resource.
- UE-A may include information on an SCI detection attempt slot to be referred to when generating non-preferred resources and/or preferred resources. For example, UE-A uses at least the SCI received in the SCI detection slot provided by the UE-B in the request signal and/or the reserved resource indicated in the SCI for a preferred resource and/or for UE-B transmission. It may be to determine a non-preferred resource.
- the preferred resource and/or non-preferred resource provided by UE-A to UE-B is not set as a resource excluded from non-preferred or available resources as a result of UE-B's sensing, but UE-A's sensing result may include a case where it is set as a non-preferred resource.
- UE-A's sensing result may include a case where it is set as a non-preferred resource.
- the PSCCH DMRS and/or PSSCH DMRS-based RSRP measurement value received by UE-A is above or above the first RSRP threshold and/or below or below the second RSRP threshold
- UE-A is The PSCCH/PSSCH and/or the SCI corresponding thereto may determine a reserved resource indicated as a non-preferred resource.
- the reserved resource indicated in the SCI may be determined as a non-preferred resource.
- the reserved resource indicated in the SCI may be determined as a non-preferred resource.
- UE-A may be a receiving terminal of UE-B. That is, the transmission of UE-B based on the resource reserved by the SCI may be related to UE-A.
- the non-preferred resource may be excluded.
- the first RSRP threshold and/or the second RSRP threshold may be (pre) set values.
- the second RSRP threshold may be a value determined in association with the first RSRP threshold.
- the second RSRP threshold may be a value added by a (pre)set offset value to the first RSRP threshold. The rationale for this is that when the RSRP measurement value is relatively large from the UE-A's point of view, the RSRP measurement value is also high from the UE-B's point of view, so it can already be classified as a non-preferred resource.
- the use of the RSRP measurement value and the threshold value may be different depending on whether UE-A is a receiver (receiving terminal) for a TB transmitted by UE-B.
- the resource for UE-A to receive the TB from another terminal or the resource expected to receive is in the following condition i) or ii). It may be determined as a non-preferred resource based on the. Specifically, based on the following condition i) or ii), the corresponding resource is determined as a non-preferred resource for UE-B transmission, or a candidate resource overlapping the corresponding resource may be excluded from the preferred resource for UE-B transmission.
- the resource for which UE-A receives a TB from another terminal or a resource to expect reception is based on the following condition i) It may be determined as a non-preferred resource. Specifically, based on the following condition i), the corresponding resource is determined as a non-preferred resource for UE-B transmission, or a candidate resource overlapping the corresponding resource may be excluded from the preferred resource for UE-B transmission.
- the first RSRP threshold and/or the second RSRP threshold may be determined based on a priority value related to the SCI (from among preset values). For example, the first RSRP threshold (and/or the second RSRP threshold) may be determined as a value corresponding to a value of a priority field included in the SCI among preset values.
- the first RSRP threshold may be set according to a combination of a transmission priority value and a reception priority value.
- the reception priority value may be a priority value included in the SCI received by UE-A.
- the transmission priority value may be a value included in the request signal when UE-A receives the additional information request signal from UE-B.
- the transmission priority value when determining the first RSRP threshold, may be a (pre)set value.
- it when determining the first RSRP threshold, it may be the largest value among the priority values set in the transmission resource pool and/or the reception resource pool of UE-A.
- the priority value used when determining the first RSRP threshold may be the smallest value among the priority values set in the transmission resource pool and/or the reception resource pool of UE-A.
- examples of a case in which a transmission priority value is determined as the (pre)set value or a predefined value are as follows.
- the transmission priority value may be determined as the (pre)set value or a predefined value.
- the transmission priority value may be determined as the (pre)set value or a predefined value.
- the transmission priority value may be determined as the (pre)set value or a predefined value.
- the second RSRP threshold may be set according to a reception priority value.
- the reception priority value may be a priority value included in the SCI received by UE-A.
- the second RSRP threshold may be set according to a combination of a transmission priority value and a reception priority value.
- the transmission priority value may be a (pre)set value.
- it may be the largest value among the priority values set in the transmission resource pool and/or the reception resource pool of UE-A.
- the priority value used when determining the second RSRP threshold may be the smallest value among the priority values set in the transmission resource pool and/or the reception resource pool of UE-A.
- UE-A is excluded from the preferred resource for UE-B transmission based on the SIR (signal-to-interference ratio) for the resource for receiving a TB from another terminal or for a resource expected to receive the resource. It can be determined whether or not to be included in the non-preferred resource and/or non-preferred resource. For example, when UE-A receives a TB from another UE or expects to receive a TB from another UE, when the SIR for the resource is less than or equal to a (pre)set threshold, the resource is a non-preferred resource. can be decided.
- the corresponding resource may be included in a non-preferred resource for UE-B transmission. For example, a candidate resource overlapping the corresponding resource may be included in the non-preferred resource, or a candidate resource overlapping the corresponding resource may be excluded from the preferred resource.
- the numerator value of the SIR measurement may be an RSRP value measured based on PSCCH DMRS and/or PSSCH DMRS (indicating a reserved resource) corresponding to the TB reception resource of UE-A.
- the denominator value of the SIR measurement may be an RSRP value measured based on the PSCCH DMRS and/or the PSSCH DMRS corresponding to the additional information request signal of the UE-B.
- the denominator value of the SIR measurement may be an RSRP value measured based on the PSCCH DMRS and/or the PSSCH DMRS corresponding to the SCI previously transmitted by the UE-B.
- the additional information generated based on a resource for receiving a TB from another UE or a resource expecting reception of UE-A is may be limited to
- the classification of the transmission of the UE-B may be based on the SOURCE ID and/or the DESTINATION ID obtained by the UE-A.
- the resource corresponds to the initial transmission from the UE-A standpoint (retransmission resource).
- the UE-A may be limited to a reserved resource derived from a resource first received for the TB) and used to generate additional information.
- the DMRS type used for RSRP measurement may be configured (in advance), indicated in a request of UE-B, or determined through a pre-setup process between UE-A and UE-B.
- the resource that UE-A expects to receive is from the TRIV field value and/or the resource reservation period from the PSCCH/PSSCH when UE-A recognizes that it is the recipient of the TB through PSCCH/PSSCH reception previously. It may refer to a derived reservation resource.
- UE-A may be a receiving terminal that is a target of UE-B transmission. In an embodiment of the present disclosure, UE-A may be a terminal other than the target of UE-B transmission.
- UE-B may be provided with a preferred resource for UE-B transmission from UE-A, and may perform PSCCH/PSSCH transmission to UE-A configured with SL DRX or a third UE.
- the UE-B may be required to transmit the initial transmission and/or some (re)transmission in a time interval in which drx-OnDurationTimer-SL of the receiving terminal operates, and transmission resources are not secured in the time interval. Otherwise, the receiving terminal may no longer be able to extend ACTIVE TIME, which is a time interval for SCI reception.
- drx-OnDurationTimer-SL is a timer that periodically (re)starts according to a (pre)set period, and may be used to determine the minimum time for the UE to detect SCI during SL DRX operation.
- the drx-OnDurationTimer-SL of the receiving terminal of UE-B transmission operates in UE-A determining a preferred resource to be provided to UE-B. It may be determined to include more than a certain level of resources within the time interval.
- the predetermined level may be expressed as the number of PSCCH/PSSCH transmission resources as a (pre)set value, or may be expressed as a ratio of total preferred resources.
- the receiving terminal may be limited to the case of UE-A.
- UE-A which is a receiving terminal, determines a preferred resource
- UE-A cannot include more than a certain level of resources within a time interval in which drx-OnDurationTimer-SL of UE-A operates.
- ACTIVE TIME can be maintained for a specific time period.
- the specific time period may be a (pre)set value.
- the specific time period may be extended such that the number of preferred resources determined by UE-A is greater than or equal to a (pre)set number.
- UE-B can expect that UE-A sets the ACTIVE TIME in all or part of the preferred resources indicated by UE-A when UE-A is the receiving terminal of UE-B transmission. and UE-B may be allowed to select a resource for initial transmission from the preferred resource after the drx-OnDurationTimer-SL of UE-A has expired.
- UE-B when UE-B is provided with a preferred resource from UE-A, the number of resources available within the time interval during which drx-OnDurationTimer-SL of the receiving terminal of UE-B transmission in the preferred resource is operating and / or Only when the ratio of all available resources in the resource selection window exceeds or exceeds a specific threshold value, UE-B may use the additional information received from UE-A for resource (re)selection. That is, for example, in the opposite situation to the above situation, UE-B may omit the additional information received from UE-A.
- the UE-B may transmit PSCCH/PSSCH to the receiving terminal using the EXCEPTIONAL POOL, or through resources of DEFAULT ON DURATION
- the PSCCH/PSSCH may be transmitted to the receiving terminal or information indicating ON DURATON extension of the receiving terminal may be transmitted.
- each UE may indicate to the receiving terminal the reception preferred resource and/or non-preferred resource of the UE.
- a PSCCH/PSSCH corresponding thereto is transmitted through the second SCI or through a MAC CE within a specific time interval determined based on the UE's preferred resource in terms of reception. and/or a non-preferred resource may be transmitted to the receiving terminal.
- the receiving terminal may perform resource (re)selection in consideration of recently received preferred and/or non-preferred resources when transmitting the PSCCH/PSSCH to the transmitting terminal again.
- the start time of the specific time period may start after a slot offset set (in advance) from the PSCCH/PSSCH transmission time and/or indicated by additional information.
- information on a preferred resource and/or a non-preferred resource within a specific time interval may be expressed in the form of a bitmap.
- the bitmap may be used to indicate a time axis resource (eg, a slot or a slot group).
- the bitmap is a two-dimensional combination of time-domain resources and frequency-axis resources (eg, a combination of a slot and a sub-channel, a combination of a slot group and a sub-channel group, or a combination of a slot group and a PRB group, etc.) can be used to indicate
- the PAYLOAD size used to indicate a preferred resource and/or a non-preferred resource may be set (in advance) or a predefined value.
- the length for the specific time interval may be set (in advance) or a predefined value.
- the size of the slot group and/or subchannel group and/or PRB group may be a value determined IMPLICIT according to the size of PAYLOAD for additional information.
- the UE-B indicates that the information indicated in the bitmap is a specific number of times (eg, a (pre)set value or additional information).
- the value indicated in ) can be interpreted by extending the preferred resource and/or the non-preferred resource in a repeating form.
- UE-B may cancel the use of additional information when a set of available resource candidates determined based on the UE-B's sensing result and additional information is concentrated in some regions within the resource selection window.
- the available resource candidates are T2_min from the slot N time point at which the UE-B's resource (re)selection is triggered (eg, the minimum size of the resource reselection window or the minimum value of the end point of the resource selection window from slot N) ), the UE-B may cancel the use of the additional information when it is located at an earlier time point.
- the specific threshold value may be a (pre)set value.
- the specific threshold value may be a value determined based on the HARQ RTT value and the number of retransmissions or the maximum number of retransmissions.
- the additional information transmitted by the UE-A may not include an RSRP measurement value and/or a priority value for a non-preferred resource.
- UE-B may report RE-EVALUATION or PRE-EMPTION to the upper layer of UE-B for the selected resource.
- the RE-EVALUATION or PRE-EMPTION report determined based on the additional information may be separately distinguished from the report type by SCI detection. For example, if the selection resource of UE-B is already indicated by SCI in the above, PRE-EMPTION may be reported, and RE-EVALUTION may be reported before indicated by SCI.
- a (PRE)CONFIGURATON set for saving power consumption may be configured.
- at least one setting of the following 1) to 7) may be applied to the terminal operation.
- PSFCH resource period is set to 4 or 0
- NACK may be transmitted using the PSFCH resource corresponding to the PSSCH.
- the SL HARQ-ACK feedback for transmission of the UE is deactivated and/or the SL HARQ-ACK feedback indicated by the received SCI is groupcast OPTION 1 (NACK-ONLY).
- the UE may RELEASE the reserved retransmission resource.
- other UEs may not be aware of whether the RELEASE is, and accordingly, it may be unnecessarily excluded from the available resources at the time of resource (re)selection regardless of whether or not it is used.
- the corresponding reserved reselection resource is All or a part may be included in the preferred resource to be transmitted to the UE-B.
- UE-B may determine/expect that the retransmission resource is RELASEd, and target of available resources can be included in For example, the RELEASE reserved retransmission resource may be included in the available resources again according to the sensing result of the UE-B.
- resource collision may occur again because the reselection resource is not indicated by the SCI.
- UE-B receiving the resource collision indicator reselects the resource, it selects the resource after the reserved resource already indicated by the UE-B by the SCI, but the reselected resource is selected from the reserved resource indicated by the SCI.
- the updated reservation resource information (reselected resources may be included) may be provided to the receiving terminal.
- the constraint on the resource reselectable resource may be that whether to perform the operation is set (in advance).
- UE-A may instead transmit a NACK to UE-B based on the PSFCH corresponding to the collision PSSCH instead of another receiving terminal.
- UE-B cannot detect SCI due to i) transmission of NACK transmitted after detection of SCI by the receiving terminal and ii) resource collision (HALF-DUPLEX), and UE-A, which is a third terminal, It may be necessary to distinguish between sending a NACK.
- the terminal that has transmitted the NACK after detecting the SCI may have already stored the TB for the initial transmission in the buffer, and the receiving terminal in which the resource collision has occurred may have no TB stored in the buffer.
- the UE receiving the first TB in the retransmission resource after resource collision may not succeed in decoding only by retransmission. More specifically, when UE-B performs retransmission using RV 1 or 2, the UE(s) storing the encoded TB for initial transmission (generally, RV value 0 or 3) in a buffer is sent to CHASE COMBINING. TB can be successfully decrypted.
- the UE that has received the coded TB for RV 1 or 2 due to resource collision may not succeed in decoding and may require additional retransmission again.
- UE-A uses a PSFCH resource for general NACK transmission and a separate resource (eg, a PSFCH resource for ACK or a transmission method or a separate PSFCH resource) for the resource collision PSSCH of UE-B.
- a collision indicator may be transmitted.
- UE-A transmits NACK instead of PSFCH resource for SL HARQ-ACK feedback for UE-B's resource collision PSSCH or transmits resource collision indicator as a separate PSFCH resource or state value (in advance) ) can be set.
- UE-B when UE-B receives preferred resource information for UE-B transmission from UE-A, UE-B may include a resource out of the preferred resource in resource (re)selection in a specific situation as a candidate resource.
- the specific situation may be a case where the ratio of the number of preferred resources indicated by the additional information to the total number of resources in the resource selection window of UE-B is less than or less than a (pre)set threshold value.
- the specific situation may be a case in which the ratio of the number of slots including the preferred resource indicated by the additional information to the number of slots in the resource selection window of UE-B is less than or less than a (pre)set threshold value.
- the specific situation is that the ratio of the number of preferred resources indicated by the additional information to the total number of resources from the start of the resource selection window of UE-B to T_2,min is less than or less than a (pre)set threshold value.
- a (pre)set threshold value may be the case
- the ratio of the number of slots including the preferred resource indicated by the additional information to the total number of slots from the start of the resource selection window of UE-B to T_2,min is a threshold value set (in advance) It may be less than or less than the case.
- the specific situation is when the ratio of the number of candidate resources available in the preferred resource selected according to the sensing result of the UE-B to the total number of preferred resources indicated in the additional information is less than or less than a (pre)set threshold.
- UE-B when UE-B includes a resource out of the preferred resource for resource (re)selection as a candidate resource, it may preferentially use the resource of a slot including the preferred resource.
- the preferred resource in the operation, the preferred resource may be updated in a form including the resource of the slot including the preferred resource indicated by the additional information, and the operation may be to check again whether the preferred resource is sufficient. . For example, if the preferred resource is still insufficient after the above process, the resource of the slot not including the preferred resource indicated in the additional information may be used as a resource candidate during resource (re)selection of the UE-B.
- the threshold value may be a value set differently for each priority, or may be a succession of the minimum value X% of the ratio to the available resources.
- UE-B when UE-B receives non-preferred resource information for UE-B transmission from UE-A, UE-B may include a resource in the non-preferred resource as a candidate resource in resource (re)selection in a specific situation.
- the specific situation is that the ratio of the number of resources other than the non-preferred resource indicated by the side information in the window to the total number of resources in the resource selection window of UE-B is less than or less than a (pre)set threshold value.
- the ratio of the number of remaining resources except for the non-preferred resource indicated by the additional information in the section to the total number of resources from the start of the resource selection window of UE-B to T_2,min (in advance) ) may be less than or less than the set threshold.
- the ratio of the number of available candidate resources selected according to the sensing result of UE-B among the total number of resources other than the non-preferred resource indicated in the additional information in the resource selection window is set (in advance) It may be less than or less than a threshold value.
- the threshold value may be a value set differently for each priority, or may be a succession of the minimum value X% of the ratio to the available resources.
- the preferred resource transmitted by UE-A to UE-B in the next system may be a set of resources that satisfy all or part of the conditions according to Table 12 below.
- the preferred resource received from another UE-A is at least Condition 1-A It may be used for resource (re)selection only when it is determined based on -1.
- another UE-A may include in the additional information whether the resource determined by Condition 1-A-1 is included and/or based on which Condition it is determined when transmitting the preferred resource. have.
- UE-B receives preference received from UE-As corresponding to a plurality of receiving terminals at the time of (re)selection of PSCCH/PSSCH resource for groupcast and/or broadcast transmission including UE-A.
- a specific threshold eg, a (pre)set value or a value determined based on it
- the preferred resource received from all or part of the receiving terminal(s) is UE- It may not be used in B's resource (re)selection process.
- the non-preferred resource transmitted from UE-A to UE-B in the next system may be a set of resources that satisfy all or part of the conditions and/or options of Table 13 below.
- UE-B is a PSCCH / PSSCH resource (re) selection for unicast and / or groupcast and / or broadcast transmission including UE-A (not the reception target of UE-B transmission) )
- the non-preferred resource received from another UE-A is (re)selected only when the non-preferred resource is determined based on at least Condition 1-B-1 with Option 2 and/or Condition 1-B-1 with Option 1 It may be used in the city.
- another UE-A determines whether a resource determined by Condition 1-B-1 with Option 2 is included and/or based on which Condition and/or Option when transmitting a non-preferred resource may be included in the additional information (adjustment information).
- a resource collision indicator for UE-B reserved resource(s) transmitted from UE-A to UE-B may be a set of resources that satisfy all or part of the conditions in Table 14 below.
- UE-A transmits a resource collision indicator for UE-B reserved resource(s) to UE-B in the next system, in which UE-B's reserved resource the resource collision occurs and/or the resource collision indicator is Whether it is determined by which Condition and/or Option may be transmitted by differently setting the PSFCH resource (PRB and/or M_0 value) and/or PSFCH value (M_CS) used for resource collision indicator transmission.
- PSFCH resource PRB and/or M_0 value
- M_CS PSFCH value
- UE-B when UE-B receives a resource collision indicator from a plurality of UE-A, UE-B receives all of the reserved resources of UE-B corresponding to the resource collision indicated together based on the received resource collision indicator. Alternatively, resource reselection may be performed for some.
- resource reselection may be performed to avoid all resources of the slot to which the reserved resource belongs.
- operations eg, operations related to inter-UE coordination
- UE-A/UE-B operations related to inter-UE coordination
- the processing may be performed by the apparatus of FIGS. 15 to 20 (eg, the processors 102 and 202 of FIG. 16 ).
- the operations are performed by at least one processor (eg: It may be stored in a memory (eg, 104 and 204 of FIG. 16 ) in the form of an instruction/program (eg, instruction, executable code) for driving 102 and 202 of FIG. 16 .
- processor eg: It may be stored in a memory (eg, 104 and 204 of FIG. 16 ) in the form of an instruction/program (eg, instruction, executable code) for driving 102 and 202 of FIG. 16 .
- FIG. 13 is a flowchart illustrating a method for a first terminal to determine a non-preferred resource in a wireless communication system according to an embodiment of the present specification.
- the method for the first terminal to determine a non-preferred resource in a wireless communication system includes a PSCCH DMRS receiving step (S1310), a PSCCH receiving step (S1320), a PSSCH DMRS receiving step ( S1330) and a non-preferred resource determination step (S1340) may be included.
- a first terminal may mean UE-A of FIG. 12
- a second terminal may mean UE-B of FIG. 12
- the first terminal may be a terminal transmitting coordination information to the second terminal
- the second terminal may be a terminal receiving coordination information from the first terminal.
- the third terminal may be a terminal that transmits sidelink control information (eg, 1st stage SCI) related to generation of coordination information to the first terminal.
- the third terminal may include one or more terminals (other UE(s)) different from the second terminal.
- the adjustment information may mean additional information or auxiliary information in the above-described embodiment.
- the first terminal receives a demodulation reference signal (PSCCH DeModulation Reference Signal, PSCCH DMRS) for a physical sidelink control channel (PSCCH) from the third terminal.
- PSCCH DMRS demodulation reference Signal
- the first terminal may calculate Reference Signal Received Power (RSRP) based on the measurement for the PSCCH DMRS.
- RSRP Reference Signal Received Power
- the first terminal receives a demodulation reference signal for the physical sidelink control channel (PSCCH) from the third terminal (100/200 in FIGS. 15 to 20)
- the operation of receiving the PSCCH DMRS may be implemented by the apparatus of FIGS. 15 to 20 .
- the one or more processors 102 are configured to receive one or more transceivers 106 to receive a demodulation reference signal (PSCCH DMRS) for a physical sidelink control channel (PSCCH) from the third terminal 200 . and/or one or more memories 104 .
- the first terminal receives the PSCCH from the third terminal.
- one or more resources may be determined based on Sidelink Control Information (SCI) related to the PSCCH.
- SCI Sidelink Control Information
- a sidelink control channel may be transmitted through the PSCCH.
- the SCI may be based on SCI format 1A (1st stage SCI) of Table 6.
- the one or more resources may be determined based on the SCI (eg, a resource reservation period field).
- the first UE may receive the PSSCH DMRS based on the SCI (eg, DMRS pattern field).
- the operation of the first terminal (100/200 in FIGS. 15 to 20) receiving the PSCCH from the third terminal (100/200 in FIGS. 15 to 20) is the apparatus of FIGS. 15 to 20 can be implemented by
- one or more processors 102 may control one or more transceivers 106 and/or one or more memories 104 to receive the PSCCH from the third terminal 200 .
- the first terminal receives a demodulation reference signal (PSSCH DMRS) for a physical sidelink shared channel (Physical Sidelink Shared Channel, PSSCH) from the third terminal.
- PSSCH DMRS demodulation reference signal
- the first UE may calculate the RSRP based on the measurement for the PSSCH DMRS.
- the first terminal (100/200 in FIGS. 15 to 20) receives the demodulation reference signal for the physical sidelink shared channel (PSSCH) from the third terminal (100/200 in FIGS. 15 to 20) ( PSSCH DMRS) receiving operation may be implemented by the apparatus of FIGS. 15 to 20 .
- the one or more processors 102 may include one or more transceivers 106 to receive a demodulation reference signal (PSSCH DMRS) for a physical sidelink shared channel (PSSCH) from the third terminal 200 . and/or one or more memories 104 .
- the first UE determines a non-preferred resource related to the transmission of the second UE based on the measurement of at least one of the PSCCH DMRS and/or the PSSCH DMRS.
- the one or more resources may be determined as non-preferred resources based on at least one of the embodiments described above with reference to FIG. 12 .
- the one or more resources may be determined as the non-preferred resource based on i) a reference signal received power (RSRP) based on the measurement and ii) one or more RSRP thresholds.
- RSRP reference signal received power
- the one or more RSRP thresholds may include a first RSRP threshold and a second RSRP threshold.
- the first RSRP threshold and the second RSRP threshold may be separately set/determined thresholds, respectively.
- the one or more resources may be determined as the non-preferred resource based on the RSRP and the second RSRP threshold. Specifically, based on the RSRP being less than the second RSRP threshold, the one or more resources may be determined as the non-preferred resource. In the case of RSRP lower than a certain value, the transmission of the third terminal related to the one or more resources may be more affected by interference (eg, transmission of the second terminal (UE-B)). Accordingly, in terms of protecting the reception of the UE-A of the first terminal (ie, the transmission of the terminal 3), the one or more resources may be determined as non-preferred resources related to the transmission of the UE-B.
- the one or more resources may be determined as the non-preferred resource based on the RSRP and the first RSRP threshold. Specifically, based on the RSRP being greater than the first RSRP threshold, the one or more resources may be determined as the non-preferred resource. From the RSRP measured (calculated) by the first terminal, when the interference to the transmission of the second terminal (UE-B) is expected to be large, the transmission in the corresponding resource (ie, the transmission of the UE-B) is avoided Needs to be. Accordingly, the one or more resources may be determined as non-preferred resources related to the transmission of the UE-B.
- the information on the RSRP threshold for determining the non-preferred resource may be based on pre-configured information. Specifically, the information on the RSRP threshold for determining the non-preferred resource may be preset or configured from the base station.
- the information on the RSRP threshold for determining the non-preferred resource may be configured by the base station in the first terminal.
- the information on the RSRP threshold for determining the non-preferred resource may be defined/configured information (when the terminal is implemented). This embodiment may be based on the embodiments related to the '(pre)set threshold value' described above.
- Information on the RSRP threshold for determining the non-preferred resource may include a plurality of RSRP thresholds. have. That is, a first RSRP threshold and/or a second RSRP threshold may be determined from among the preset RSRP thresholds. It will be described in detail below.
- the plurality of RSRP thresholds may include first values and/or second values.
- the first values eg, sl-ThresholdRSRP-Condition1-B-1-Option1List
- the second values eg, sl-ThresholdRSRP-Condition1-B-1-Option2List
- the first RSRP threshold A value or the second RSRP threshold may be determined.
- the first RSRP threshold may be determined based on the first values and a value of the priority field of the SCI.
- the second RSRP threshold may be determined based on the second values and a value of the priority field of the SCI.
- the first RSRP threshold and the second RSRP threshold may be determined based on the priority value. Specifically, based on a value of a priority field included in the SCI, the first RSRP threshold or the second RSRP threshold may be determined.
- the above-described examples are examples of setting information according to the embodiments disclosed herein.
- the information on the RSRP threshold for the determination of the non-preferred resource is a setting related to transmission and reception of auxiliary information (resource collision indicator, preference and/or non-preferred resource) according to the above-described embodiment (FIG. 12) (eg, inter-terminal adjustment ( inter-UE coordination) related configuration, SL-InterUE-CoordinationConfig ) may be included.
- the information on the RSRP threshold for determining the non-preferred resource may be referred to as configuration information related to inter-terminal coordination.
- the configuration information related to the inter-terminal coordination may include i) a configuration related to the resource collision indicator and ii) a configuration related to the determination of preferred/non-preferred resources.
- the first terminal (100/200 in FIGS. 15 to 20) based on the measurement of at least one of the PSCCH DMRS and/or the PSSCH DMRS, the non-preference related to the transmission of the second terminal.
- the operation of determining a non-preferred resource may be implemented by the apparatus of FIGS. 15 to 20 .
- the one or more processors 102 may configure a non-preferred resource related to transmission of a second terminal based on a measurement for at least one of the PSCCH DMRS and/or the PSSCH DMRS.
- One or more transceivers 106 and/or one or more memories 104 may be controlled to determine a preferred resource.
- the method may further include transmitting coordination information.
- the first terminal may transmit coordination information indicating the non-preferred resource to the second terminal.
- the non-preferred resource may include a resource determined as a non-preferred resource based on at least one of the first RSRP threshold and/or the second RSRP threshold.
- the non-preferred resource may include a resource determined as a non-preferred resource based on the first RSRP threshold. This example corresponds to a case where the first terminal is not the receiving terminal of the third terminal.
- the non-preferred resource may include a resource determined as a non-preferred resource based on the second RSRP threshold. This example corresponds to a case in which the first terminal is the receiving terminal of the third terminal.
- the non-preferred resource may include a resource determined as a non-preferred resource based on the first RSRP threshold and a resource determined as a non-preferred resource based on the second RSRP threshold.
- This example corresponds to a case in which the first terminal receives a PSCCH (SCI) from a plurality of third terminals (eg, terminal 3-1, terminal 3-2).
- the first terminal may be a receiving terminal in relation to terminal 3-1 and may not be a receiving terminal in relation to terminal 3-2.
- the non-preferred resource is a resource determined as a non-preferred resource based on the first RSRP threshold (reserved resource through SCI received from UE 3-2) and a resource determined as a non-preferred resource based on the second RSRP threshold (resources reserved through the SCI received from the terminal 3-1) may be included.
- the adjustment information may be transmitted through a physical sidelink shared channel (PSSCH).
- PSSCH physical sidelink shared channel
- the transmission of the adjustment information may be triggered based on i) a predefined condition or ii) a request related to the adjustment information.
- the predefined condition may be related to the specific event described above. For example, based on that the predefined condition is satisfied (a specific event occurs), the first terminal may transmit the adjustment information to the second terminal. That is, the transmission of the adjustment information according to the present embodiment may be based on the transmission of the additional information based on the occurrence of the event described above with reference to FIG. 12 .
- the first terminal may transmit the adjustment information to the second terminal.
- the request related to the adjustment information may be based on an embodiment related to at least one of the request signal (a signal requesting the adjustment information) described above with reference to FIG. 12 , request signaling, an additional information request, and/or request information.
- the adjustment information may be based on a second stage SCI (second stage SCI) and/or a Medium Access Control-Control Element (MAC-CE).
- the adjustment information may be included in the second stage SCI.
- the first terminal may transmit the second stage SCI to the second terminal.
- the coordination information may be included in the MAC-CE (eg, Inter-UE Coordination Information MAC CE).
- the first terminal may transmit the MAC-CE to the second terminal.
- a processing time T_proc,0 or T_0 (a value having T_proc,0 as an upper limit) may be required for the first terminal to generate sensing information.
- a minimum processing time T_proc,1 or T_1 (a value having T_proc,1 as an upper limit) may be required for the first terminal to perform resource (re)selection to determine the resource.
- the information for generating the adjustment information may be limited to those obtained before a predefined time point (a specific time point according to the above-described embodiment). It will be described in detail below.
- the information (the SCI) for generating the adjustment information may be received within a predefined time window. That is, the SCI may be received before a predefined time point.
- the predefined time may be determined based on a transmission time of the adjustment information and a processing time of the first terminal (at least one of T_proc,0, T_0, T_proc,1 and/or T_1).
- the predefined time may be determined as a time before the T_proc,0 from the transmission time (slot) of the adjustment information.
- the predefined time point may be determined based on at least one of i) T_proc,0, ii) T_0, iii) T_proc,1, iv) T_1 and/or v) PSSCH-to-PSFCH minimum timing value.
- the predefined time is i) T_proc,0, ii) T_0, iii) T_proc,1, iv) T_1 and/or v) PSSCH-to-PSFCH minimum timing from the transmission time (slot) of the adjustment information. It may be determined as a time point before the value determined based on at least one of the values.
- the predefined time point may be determined based on a value having T_proc,0, T_0, T_proc,0+T_proc,1, T_0+T_proc,1, T_0+T_1, or T_proc,0+T_proc,1 as an upper limit.
- the predefined time may be determined as a time before T_0+T_proc,1 from the transmission time (slot) of the adjustment information.
- the first terminal (100/200 in FIGS. 15 to 20) transmits coordination information indicating the non-preferred resource to the second terminal (100/200 in FIGS. 15 to 20)
- the operation may be implemented by the apparatus of FIGS. 15 to 20 .
- the one or more processors 102 may send one or more transceivers 106 and/or one or more memories to the second terminal 200 to transmit coordination information indicating the non-preferred resource. (104) can be controlled.
- FIG. 14 is a flowchart illustrating a method for a second terminal to receive adjustment information in a wireless communication system according to another embodiment of the present specification.
- a method for a second terminal to receive adjustment information in a wireless communication system may include an adjustment information receiving step ( S1410 ).
- the second terminal may mean UE-B of FIG. 12
- the first terminal may mean UE-A of FIG. 12
- the second terminal may be a terminal that receives coordination information from the first terminal
- the first terminal may be a terminal that transmits coordination information to the second terminal.
- the third terminal may be a terminal that transmits sidelink control information (eg, 1st stage SCI) related to generation of coordination information to the first terminal.
- the third terminal may include one or more terminals (other UE(s)) different from the second terminal.
- the adjustment information may mean additional information or auxiliary information in the above-described embodiment.
- the second terminal receives the adjustment information from the first terminal.
- the adjustment information may indicate a non-preferred resource related to the transmission of the second terminal.
- the adjustment information may be received through a physical sidelink shared channel (PSSCH).
- PSSCH physical sidelink shared channel
- the adjustment information may be based on a second stage SCI (second stage SCI) and/or a Medium Access Control-Control Element (MAC-CE).
- the adjustment information may be included in the second stage SCI.
- the second terminal may receive the second stage SCI from the first terminal.
- the coordination information may be included in the MAC-CE (eg, Inter-UE Coordination Information MAC CE).
- the second terminal may receive the MAC-CE from the first terminal.
- the non-preferred resource may be determined based on signaling between the first terminal and the third terminal. It will be described in detail below.
- the first terminal receives a demodulation reference signal (PSCCH DeModulation Reference Signal, PSCCH DMRS) for a physical sidelink control channel (PSCCH) from the third terminal.
- PSCCH demodulation reference Signal
- PSCCH DMRS Physical sidelink control channel
- the first terminal may calculate Reference Signal Received Power (RSRP) based on the measurement for the PSCCH DMRS.
- RSRP Reference Signal Received Power
- the first terminal receives the PSCCH from the third terminal.
- one or more resources may be determined based on Sidelink Control Information (SCI) related to the PSCCH.
- SCI Sidelink Control Information
- a sidelink control channel (SCI) may be transmitted through the PSCCH.
- the SCI may be based on SCI format 1A (1st stage SCI) of Table 6.
- the one or more resources may be determined based on the SCI (eg, a resource reservation period field).
- the first UE may receive the PSSCH DMRS based on the SCI (eg, DMRS pattern field).
- the first terminal receives a demodulation reference signal (PSSCH DMRS) for a physical sidelink shared channel (PSSCH) from the third terminal.
- PSSCH DMRS demodulation reference signal
- the first UE may calculate the RSRP based on the measurement for the PSSCH DMRS.
- the non-preferred resource is at least one of a demodulation reference signal (PSCCH DMRS) for a physical sidelink control channel (PSCCH) and/or a demodulation reference signal (PSSCH DMRS) for a physical sidelink shared channel (PSSCH) Measurement (measurement) can be determined based on As described above, the PSCCH DMRS and the PSSCH DMRS are transmitted from the third terminal to the first terminal. In this case, one or more resources may be determined based on Sidelink Control Information (SCI) related to the PSCCH.
- SCI Sidelink Control Information
- the one or more resources may be determined as non-preferred resources based on at least one of the embodiments described above with reference to FIG. 12 .
- the one or more resources may be determined as the non-preferred resource based on i) a reference signal received power (RSRP) based on the measurement and ii) one or more RSRP thresholds.
- RSRP reference signal received power
- the one or more RSRP thresholds may include a first RSRP threshold and a second RSRP threshold.
- the first RSRP threshold and the second RSRP threshold may be separately set/determined thresholds, respectively.
- the one or more resources may be determined as the non-preferred resource based on the RSRP and the second RSRP threshold. Specifically, based on the RSRP being less than the second RSRP threshold, the one or more resources may be determined as the non-preferred resource. In the case of RSRP lower than a certain value, the transmission of the third terminal related to the one or more resources may be more affected by interference (eg, transmission of the second terminal (UE-B)). Accordingly, in terms of protecting the reception of the UE-A of the first terminal (ie, the transmission of the terminal 3), the one or more resources may be determined as non-preferred resources related to the transmission of the UE-B.
- the one or more resources may be determined as the non-preferred resource based on the RSRP and the first RSRP threshold. Specifically, based on the RSRP being greater than the first RSRP threshold, the one or more resources may be determined as the non-preferred resource. From the RSRP measured (calculated) by the first terminal, when the interference to the transmission of the second terminal (UE-B) is expected to be large, the transmission in the corresponding resource (ie, the transmission of the UE-B) is avoided Needs to be. Accordingly, the one or more resources may be determined as non-preferred resources related to the transmission of the UE-B.
- the non-preferred resource may include a resource determined as a non-preferred resource based on at least one of the first RSRP threshold and/or the second RSRP threshold.
- the non-preferred resource may include a resource determined as a non-preferred resource based on the first RSRP threshold. This example corresponds to a case where the first terminal is not the receiving terminal of the third terminal.
- the non-preferred resource may include a resource determined as a non-preferred resource based on the second RSRP threshold. This example corresponds to a case in which the first terminal is the receiving terminal of the third terminal.
- the non-preferred resource may include a resource determined as a non-preferred resource based on the first RSRP threshold and a resource determined as a non-preferred resource based on the second RSRP threshold.
- This example corresponds to a case in which the first terminal receives a PSCCH (SCI) from a plurality of third terminals (eg, terminal 3-1, terminal 3-2).
- the first terminal may be a receiving terminal in relation to terminal 3-1 and may not be a receiving terminal in relation to terminal 3-2.
- the non-preferred resource is a resource determined as a non-preferred resource based on the first RSRP threshold (reserved resource through SCI received from UE 3-2) and a resource determined as a non-preferred resource based on the second RSRP threshold (resources reserved through the SCI received from the terminal 3-1) may be included.
- the information on the RSRP threshold for determining the non-preferred resource may be based on pre-configured information. Specifically, the information on the RSRP threshold for determining the non-preferred resource may be preset or configured from the base station.
- the information on the RSRP threshold for determining the non-preferred resource may be configured by the base station in the first terminal.
- the information on the RSRP threshold for determining the non-preferred resource may be defined/configured information (when the terminal is implemented). This embodiment may be based on the embodiments related to the '(pre)set threshold value' described above.
- Information on the RSRP threshold for determining the non-preferred resource may include a plurality of RSRP thresholds. have. That is, a first RSRP threshold and/or a second RSRP threshold may be determined from among the preset RSRP thresholds. It will be described in detail below.
- the plurality of RSRP thresholds may include first values and/or second values.
- the first values eg, sl-ThresholdRSRP-Condition1-B-1-Option1List
- the second values eg, sl-ThresholdRSRP-Condition1-B-1-Option2List
- the first RSRP threshold A value or the second RSRP threshold may be determined.
- the first RSRP threshold may be determined based on the first values and a value of the priority field of the SCI.
- the second RSRP threshold may be determined based on the second values and a value of the priority field of the SCI.
- the first RSRP threshold and the second RSRP threshold may be determined based on the priority value. Specifically, based on a value of a priority field included in the SCI, the first RSRP threshold or the second RSRP threshold may be determined.
- the above-described examples are examples of setting information according to the embodiments disclosed herein.
- the information on the RSRP threshold for the determination of the non-preferred resource is a setting related to transmission and reception of auxiliary information (resource collision indicator, preference and/or non-preferred resource) according to the above-described embodiment (FIG. 12) (eg, inter-terminal adjustment ( inter-UE coordination) related configuration, SL-InterUE-CoordinationConfig ) may be included.
- the information on the RSRP threshold for determining the non-preferred resource may be referred to as configuration information related to inter-terminal coordination.
- the configuration information related to the inter-terminal coordination may include i) a configuration related to the resource collision indicator and ii) a configuration related to the determination of preferred/non-preferred resources.
- a processing time T_proc,0 or T_0 (a value having T_proc,0 as an upper limit) may be required for the first terminal to generate sensing information.
- a minimum processing time T_proc,1 or T_1 (a value having T_proc,1 as an upper limit) may be required for the first terminal to perform resource (re)selection to determine the resource.
- the information for generating the adjustment information may be limited to those obtained before a predefined time point (a specific time point according to the above-described embodiment). It will be described in detail below.
- the information (the SCI) for generating the adjustment information may be received within a predefined time window. That is, the SCI may be received before a predefined time point.
- the predefined time may be determined based on a transmission time of the adjustment information and a processing time of the first terminal (at least one of T_proc,0, T_0, T_proc,1 and/or T_1).
- the predefined time may be determined as a time before the T_proc,0 from the transmission time (slot) of the adjustment information.
- the predefined time point may be determined based on at least one of i) T_proc,0, ii) T_0, iii) T_proc,1, iv) T_1 and/or v) PSSCH-to-PSFCH minimum timing value.
- the predefined time is i) T_proc,0, ii) T_0, iii) T_proc,1, iv) T_1 and/or v) PSSCH-to-PSFCH minimum timing from the transmission time (slot) of the adjustment information. It may be determined as a time point before the value determined based on at least one of the values.
- the predefined time point may be determined based on a value having T_proc,0, T_0, T_proc,0+T_proc,1, T_0+T_proc,1, T_0+T_1, or T_proc,0+T_proc,1 as an upper limit.
- the predefined time may be determined as a time before T_0+T_proc,1 from the transmission time (slot) of the adjustment information.
- FIGS. 15 to 20 the operation of the second terminal (100/200 in FIGS. 15 to 20 ) receiving the adjustment information from the first terminal ( 100/200 in FIGS. 15 to 20 ) is shown in FIGS. 15 to 20 .
- the one or more processors 202 may control the one or more transceivers 206 and/or the one or more memories 204 to receive the adjustment information from the first terminal 100 . .
- the transmission of the adjustment information by the first terminal may be triggered based on i) a predefined condition or ii) a request related to the adjustment information.
- the predefined condition may be related to the specific event described above. For example, based on that the predefined condition related to the first terminal is satisfied (occurrence of a specific event related to the first terminal), the second terminal may receive the adjustment information from the first terminal. That is, the reception of the adjustment information according to the present embodiment may be based on the event occurrence-based additional information transmission described above with reference to FIG. 12 .
- the transmission of the adjustment information by the first terminal may be triggered based on a request related to the adjustment information.
- the method may further include transmitting a request related to coordination information before S1410.
- the second terminal may transmit a request related to the adjustment information to the first terminal.
- the first terminal may transmit the adjustment information to the second terminal.
- the request related to the adjustment information may be based on an embodiment related to at least one of the request signal (a signal requesting the adjustment information) described above with reference to FIG. 12 , request signaling, an additional information request, and/or request information.
- the second terminal (100/200 in FIGS. 15 to 20 ) transmits the request related to the adjustment information to the first terminal ( 100/200 in FIGS. 15 to 20 ) in FIGS. 15 to 20 .
- It may be implemented by the apparatus of FIG. 20 .
- the one or more processors 202 control the one or more transceivers 206 and/or the one or more memories 204 to transmit a request related to the adjustment information to the first terminal 100 . can do.
- the method may further include a resource selection step.
- the second terminal may determine resource(s) for PSSCH transmission (eg, resource(s) related to resource allocation mode 2) based on the adjustment information.
- the second terminal may exclude a resource overlapping the non-preferred resource from the resource for the PSSCH transmission in the resource selection window.
- the second terminal may transmit the PSSCH based on the determined resource(s).
- the receiving terminal related to the transmission of the PSSCH may be the first terminal.
- the receiving terminal related to the transmission of the PSSCH may be a different terminal from the first terminal.
- the operation of the second terminal (100/200 in FIGS. 15 to 20 ) determining a resource for PSSCH transmission based on the adjustment information may be implemented by the apparatus of FIGS. 15 to 20 .
- the one or more processors 202 may control one or more transceivers 206 and/or one or more memories 204 to determine a resource for transmission of a PSSCH based on the coordination information.
- 15 shows a communication system 1 according to an embodiment of the present specification.
- a communication system 1 to which various embodiments of the present specification are applied includes a wireless device, a base station, and a network.
- the wireless device refers to a device that performs communication using a wireless access technology (eg, 5G NR (New RAT), LTE (Long Term Evolution)), and may be referred to as a communication/wireless/5G device.
- the wireless device may include a robot 100a, a vehicle 100b-1, 100b-2, an eXtended Reality (XR) device 100c, a hand-held device 100d, and a home appliance 100e. ), an Internet of Thing (IoT) device 100f, and an AI device/server 400 .
- the vehicle may include a vehicle equipped with a wireless communication function, an autonomous driving vehicle, a vehicle capable of performing inter-vehicle communication, and the like.
- the vehicle may include an Unmanned Aerial Vehicle (UAV) (eg, a drone).
- UAV Unmanned Aerial Vehicle
- XR devices include AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality) devices, and include a Head-Mounted Device (HMD), a Head-Up Display (HUD) provided in a vehicle, a television, a smartphone, It may be implemented in the form of a computer, a wearable device, a home appliance, a digital signage, a vehicle, a robot, and the like.
- the mobile device may include a smartphone, a smart pad, a wearable device (eg, a smart watch, smart glasses), a computer (eg, a laptop computer), and the like.
- Home appliances may include a TV, a refrigerator, a washing machine, and the like.
- the IoT device may include a sensor, a smart meter, and the like.
- the base station and the network may be implemented as a wireless device, and a specific wireless device 200a may operate as a base station/network node to other wireless devices.
- the wireless devices 100a to 100f may be connected to the network 300 through the base station 200 .
- Artificial intelligence (AI) technology may be applied to the wireless devices 100a to 100f , and the wireless devices 100a to 100f may be connected to the AI server 400 through the network 300 .
- the network 300 may be configured using a 3G network, a 4G (eg, LTE) network, or a 5G (eg, NR) network.
- the wireless devices 100a to 100f may communicate with each other through the base station 200/network 300, but may also communicate directly (e.g. sidelink communication) without passing through the base station/network.
- the vehicles 100b-1 and 100b-2 may perform direct communication (eg, Vehicle to Vehicle (V2V)/Vehicle to everything (V2X) communication).
- the IoT device eg, sensor
- the IoT device may directly communicate with other IoT devices (eg, sensor) or other wireless devices 100a to 100f.
- Wireless communication/connection 150a, 150b, and 150c may be performed between the wireless devices 100a to 100f/base station 200 and the base station 200/base station 200 .
- the wireless communication/connection includes uplink/downlink communication 150a and sidelink communication 150b (or D2D communication), communication between base stations 150c (e.g. relay, IAB (Integrated Access Backhaul), etc.)
- This can be done through technology (eg 5G NR)
- Wireless communication/connection 150a, 150b, 150c allows the wireless device and the base station/radio device, and the base station and the base station to transmit/receive radio signals to each other.
- the wireless communication/connection 150a, 150b, and 150c may transmit/receive signals through various physical channels.
- various signal processing processes eg, channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.
- resource allocation processes etc.
- FIG. 16 illustrates a wireless device according to an embodiment of the present specification.
- the first wireless device 100 and the second wireless device 200 may transmit/receive wireless signals through various wireless access technologies (eg, LTE, NR).
- ⁇ first wireless device 100, second wireless device 200 ⁇ is ⁇ wireless device 100x, base station 200 ⁇ of FIG. 15 and/or ⁇ wireless device 100x, wireless device 100x) ⁇ can be matched.
- the first wireless device 100 includes one or more processors 102 and one or more memories 104 , and may further include one or more transceivers 106 and/or one or more antennas 108 .
- the processor 102 controls the memory 104 and/or the transceiver 106 and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein.
- the processor 102 may process the information in the memory 104 to generate the first information/signal, and then transmit a wireless signal including the first information/signal through the transceiver 106 .
- the processor 102 may receive the radio signal including the second information/signal through the transceiver 106 , and then store the information obtained from the signal processing of the second information/signal in the memory 104 .
- the memory 104 may be connected to the processor 102 and may store various information related to the operation of the processor 102 .
- the memory 104 may provide instructions for performing some or all of the processes controlled by the processor 102 , or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including
- the processor 102 and the memory 104 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- a wireless communication technology eg, LTE, NR
- the transceiver 106 may be coupled with the processor 102 and may transmit and/or receive wireless signals via one or more antennas 108 .
- the transceiver 106 may include a transmitter and/or a receiver.
- the transceiver 106 may be used interchangeably with a radio frequency (RF) unit.
- RF radio frequency
- a wireless device may refer to a communication modem/circuit/chip.
- the second wireless device 200 includes one or more processors 202 , one or more memories 204 , and may further include one or more transceivers 206 and/or one or more antennas 208 .
- the processor 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, proposals, methods, and/or operational flowcharts disclosed herein.
- the processor 202 may process the information in the memory 204 to generate third information/signal, and then transmit a wireless signal including the third information/signal through the transceiver 206 .
- the processor 202 may receive the radio signal including the fourth information/signal through the transceiver 206 , and then store information obtained from signal processing of the fourth information/signal in the memory 204 .
- the memory 204 may be connected to the processor 202 and may store various information related to the operation of the processor 202 .
- the memory 204 may provide instructions for performing some or all of the processes controlled by the processor 202 , or for performing the descriptions, functions, procedures, suggestions, methods, and/or operational flowcharts disclosed herein. may store software code including
- the processor 202 and the memory 204 may be part of a communication modem/circuit/chip designed to implement a wireless communication technology (eg, LTE, NR).
- a wireless communication technology eg, LTE, NR
- the transceiver 206 may be coupled to the processor 202 and may transmit and/or receive wireless signals via one or more antennas 208 .
- the transceiver 206 may include a transmitter and/or a receiver.
- the transceiver 206 may be used interchangeably with an RF unit.
- a wireless device may refer to a communication modem/circuit/chip.
- one or more protocol layers may be implemented by one or more processors 102 , 202 .
- one or more processors 102 , 202 may implement one or more layers (eg, functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP).
- the one or more processors 102, 202 may be configured to process one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the description, function, procedure, proposal, method, and/or operational flowcharts disclosed herein.
- PDUs Protocol Data Units
- SDUs Service Data Units
- One or more processors 102 , 202 may generate messages, control information, data, or information according to the description, function, procedure, proposal, method, and/or flow charts disclosed herein.
- the one or more processors 102 and 202 generate a signal (eg, a baseband signal) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and/or methods disclosed herein. , to one or more transceivers 106 and 206 .
- the one or more processors 102 , 202 may receive signals (eg, baseband signals) from one or more transceivers 106 , 206 , and may be described, functions, procedures, proposals, methods, and/or flowcharts of operation disclosed herein.
- PDUs, SDUs, messages, control information, data, or information may be acquired according to the fields.
- One or more processors 102 , 202 may be referred to as a controller, microcontroller, microprocessor, or microcomputer.
- One or more processors 102 , 202 may be implemented by hardware, firmware, software, or a combination thereof.
- ASICs Application Specific Integrated Circuits
- DSPs Digital Signal Processors
- DSPDs Digital Signal Processing Devices
- PLDs Programmable Logic Devices
- FPGAs Field Programmable Gate Arrays
- firmware or software may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, and the like.
- the descriptions, functions, procedures, suggestions, methods, and/or flow charts disclosed in this document provide that firmware or software configured to perform is included in one or more processors 102 , 202 , or stored in one or more memories 104 , 204 . It may be driven by the above processors 102 and 202 .
- the descriptions, functions, procedures, suggestions, methods, and/or flowcharts of operations disclosed herein may be implemented using firmware or software in the form of code, instructions, and/or sets of instructions.
- One or more memories 104 , 204 may be coupled to one or more processors 102 , 202 and may store various forms of data, signals, messages, information, programs, code, instructions, and/or instructions.
- the one or more memories 104 and 204 may be comprised of ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer readable storage media, and/or combinations thereof.
- One or more memories 104 , 204 may be located inside and/or external to one or more processors 102 , 202 .
- one or more memories 104 , 204 may be coupled to one or more processors 102 , 202 through various technologies, such as wired or wireless connections.
- One or more transceivers 106 , 206 may transmit user data, control information, radio signals/channels, etc. referred to in the methods and/or operational flowcharts of this document to one or more other devices.
- One or more transceivers 106, 206 may receive user data, control information, radio signals/channels, etc. referred to in the descriptions, functions, procedures, suggestions, methods and/or flow charts, etc. disclosed herein, from one or more other devices. have.
- one or more transceivers 106 , 206 may be coupled to one or more processors 102 , 202 and may transmit and receive wireless signals.
- one or more processors 102 , 202 may control one or more transceivers 106 , 206 to transmit user data, control information, or wireless signals to one or more other devices.
- one or more processors 102 , 202 may control one or more transceivers 106 , 206 to receive user data, control information, or wireless signals from one or more other devices.
- one or more transceivers 106, 206 may be coupled with one or more antennas 108, 208, and the one or more transceivers 106, 206 may be coupled via one or more antennas 108, 208 to the descriptions, functions, and functions disclosed herein. , procedures, proposals, methods and/or operation flowcharts, etc.
- one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (eg, antenna ports).
- the one or more transceivers 106, 206 convert the received radio signal/channel, etc. from the RF band signal to process the received user data, control information, radio signal/channel, etc. using the one or more processors 102, 202. It can be converted into a baseband signal.
- One or more transceivers 106 and 206 may convert user data, control information, radio signals/channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals.
- one or more transceivers 106 , 206 may include (analog) oscillators and/or filters.
- FIG. 17 illustrates a signal processing circuit for a transmission signal according to an embodiment of the present specification.
- the signal processing circuit 1000 may include a scrambler 1010 , a modulator 1020 , a layer mapper 1030 , a precoder 1040 , a resource mapper 1050 , and a signal generator 1060 .
- the operations/functions of FIG. 17 may be performed by the processors 102 , 202 and/or transceivers 106 , 206 of FIG. 16 .
- the hardware elements of FIG. 17 may be implemented in the processors 102 , 202 and/or transceivers 106 , 206 of FIG. 16 .
- blocks 1010 to 1060 may be implemented in the processors 102 and 202 of FIG. 16 .
- blocks 1010 to 1050 may be implemented in the processors 102 and 202 of FIG. 16
- block 1060 may be implemented in the transceivers 106 and 206 of FIG. 16 .
- the codeword may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 17 .
- the codeword is a coded bit sequence of an information block.
- the information block may include a transport block (eg, a UL-SCH transport block, a DL-SCH transport block).
- the radio signal may be transmitted through various physical channels (eg, PUSCH, PDSCH).
- the codeword may be converted into a scrambled bit sequence by the scrambler 1010 .
- a scramble sequence used for scrambling is generated based on an initialization value, and the initialization value may include ID information of a wireless device, and the like.
- the scrambled bit sequence may be modulated by a modulator 1020 into a modulation symbol sequence.
- the modulation method may include pi/2-Binary Phase Shift Keying (pi/2-BPSK), m-Phase Shift Keying (m-PSK), m-Quadrature Amplitude Modulation (m-QAM), and the like.
- the complex modulation symbol sequence may be mapped to one or more transport layers by the layer mapper 1030 .
- Modulation symbols of each transport layer may be mapped to corresponding antenna port(s) by the precoder 1040 (precoding).
- the output z of the precoder 1040 may be obtained by multiplying the output y of the layer mapper 1030 by the precoding matrix W of N*M.
- N is the number of antenna ports
- M is the number of transport layers.
- the precoder 1040 may perform precoding after performing transform precoding (eg, DFT transform) on the complex modulation symbols. Also, the precoder 1040 may perform precoding without performing transform precoding.
- the resource mapper 1050 may map modulation symbols of each antenna port to a time-frequency resource.
- the time-frequency resource may include a plurality of symbols (eg, a CP-OFDMA symbol, a DFT-s-OFDMA symbol) in the time domain and a plurality of subcarriers in the frequency domain.
- CP Cyclic Prefix
- DAC Digital-to-Analog Converter
- the signal processing process for the received signal in the wireless device may be configured in reverse of the signal processing process 1010 to 1060 of FIG. 17 .
- the wireless device eg, 100 and 200 in FIG. 16
- the received radio signal may be converted into a baseband signal through a signal restorer.
- the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module.
- ADC analog-to-digital converter
- FFT Fast Fourier Transform
- the baseband signal may be restored to a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a descrambling process.
- the codeword may be restored to the original information block through decoding.
- the signal processing circuit (not shown) for the received signal may include a signal reconstructor, a resource de-mapper, a post coder, a demodulator, a de-scrambler, and a decoder.
- the wireless device may be implemented in various forms according to use-examples/services (refer to FIG. 15 ).
- wireless devices 100 and 200 correspond to wireless devices 100 and 200 of FIG. 16 , and include various elements, components, units/units, and/or modules. ) may consist of
- the wireless devices 100 and 200 may include a communication unit 110 , a control unit 120 , a memory unit 130 , and an additional element 140 .
- the communication unit may include communication circuitry 112 and transceiver(s) 114 .
- communication circuitry 112 may include one or more processors 102 , 202 and/or one or more memories 104 , 204 of FIG. 16 .
- the transceiver(s) 114 may include one or more transceivers 106 , 206 and/or one or more antennas 108 , 208 of FIG. 16 .
- the control unit 120 is electrically connected to the communication unit 110 , the memory unit 130 , and the additional element 140 , and controls general operations of the wireless device.
- the controller 120 may control the electrical/mechanical operation of the wireless device based on the program/code/command/information stored in the memory unit 130 .
- control unit 120 transmits the information stored in the memory unit 130 to the outside (eg, another communication device) through the communication unit 110 through a wireless/wired interface, or through the communication unit 110 to the outside (eg, Information received through a wireless/wired interface from another communication device) may be stored in the memory unit 130 .
- the additional element 140 may be configured in various ways according to the type of the wireless device.
- the additional element 140 may include at least one of a power unit/battery, an input/output unit (I/O unit), a driving unit, and a computing unit.
- a wireless device may include a robot ( FIGS. 15 and 100a ), a vehicle ( FIGS. 15 , 100b-1 , 100b-2 ), an XR device ( FIGS. 15 and 100c ), a mobile device ( FIGS. 15 and 100d ), and a home appliance. (FIG. 15, 100e), IoT device (FIG.
- digital broadcasting terminal digital broadcasting terminal
- hologram device public safety device
- MTC device medical device
- fintech device or financial device
- security device climate/environment device
- It may be implemented in the form of an AI server/device ( FIGS. 15 and 400 ), a base station ( FIGS. 15 and 200 ), and a network node.
- the wireless device may be mobile or used in a fixed location depending on the use-example/service.
- various elements, components, units/units, and/or modules in the wireless devices 100 and 200 may be entirely interconnected through a wired interface, or at least some of them may be wirelessly connected through the communication unit 110 .
- the control unit 120 and the communication unit 110 are connected by wire, and the control unit 120 and the first unit (eg, 130 and 140 ) are connected to the communication unit 110 through the communication unit 110 . It can be connected wirelessly.
- each element, component, unit/unit, and/or module within the wireless device 100 , 200 may further include one or more elements.
- the controller 120 may be configured with one or more processor sets.
- control unit 120 may be configured as a set of a communication control processor, an application processor, an electronic control unit (ECU), a graphic processing processor, a memory control processor, and the like.
- memory unit 130 may include random access memory (RAM), dynamic RAM (DRAM), read only memory (ROM), flash memory, volatile memory, and non-volatile memory. volatile memory) and/or a combination thereof.
- FIG. 18 will be described in more detail with reference to the drawings.
- the portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, smart glasses), and a portable computer (eg, a laptop computer).
- a mobile device may be referred to as a mobile station (MS), a user terminal (UT), a mobile subscriber station (MSS), a subscriber station (SS), an advanced mobile station (AMS), or a wireless terminal (WT).
- MS mobile station
- UT user terminal
- MSS mobile subscriber station
- SS subscriber station
- AMS advanced mobile station
- WT wireless terminal
- the portable device 100 includes an antenna unit 108 , a communication unit 110 , a control unit 120 , a memory unit 130 , a power supply unit 140a , an interface unit 140b , and an input/output unit 140c .
- the antenna unit 108 may be configured as a part of the communication unit 110 .
- Blocks 110 to 130/140a to 140c respectively correspond to blocks 110 to 130/140 of FIG. 18 .
- the communication unit 110 may transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations.
- the controller 120 may control components of the portable device 100 to perform various operations.
- the controller 120 may include an application processor (AP).
- the memory unit 130 may store data/parameters/programs/codes/commands necessary for driving the portable device 100 . Also, the memory unit 130 may store input/output data/information.
- the power supply unit 140a supplies power to the portable device 100 and may include a wired/wireless charging circuit, a battery, and the like.
- the interface unit 140b may support the connection between the portable device 100 and other external devices.
- the interface unit 140b may include various ports (eg, an audio input/output port and a video input/output port) for connection with an external device.
- the input/output unit 140c may receive or output image information/signal, audio information/signal, data, and/or information input from a user.
- the input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.
- the input/output unit 140c obtains information/signals (eg, touch, text, voice, image, video) input from the user, and the obtained information/signals are stored in the memory unit 130 . can be saved.
- the communication unit 110 may convert the information/signal stored in the memory into a wireless signal, and transmit the converted wireless signal directly to another wireless device or to a base station. Also, after receiving a radio signal from another radio device or base station, the communication unit 110 may restore the received radio signal to original information/signal.
- the restored information/signal may be stored in the memory unit 130 and output in various forms (eg, text, voice, image, video, haptic) through the input/output unit 140c.
- the vehicle or autonomous driving vehicle may be implemented as a mobile robot, vehicle, train, manned/unmanned aerial vehicle (AV), ship, or the like.
- AV unmanned aerial vehicle
- the vehicle or autonomous driving vehicle 100 includes an antenna unit 108 , a communication unit 110 , a control unit 120 , a driving unit 140a , a power supply unit 140b , a sensor unit 140c , and autonomous driving. It may include a part 140d.
- the antenna unit 108 may be configured as a part of the communication unit 110 .
- Blocks 110/130/140a-140d correspond to blocks 110/130/140 of FIG. 18, respectively.
- the communication unit 110 may transmit/receive signals (eg, data, control signals, etc.) to and from external devices such as other vehicles, base stations (eg, base stations, roadside units, etc.), servers, and the like.
- the controller 120 may control elements of the vehicle or the autonomous driving vehicle 100 to perform various operations.
- the controller 120 may include an Electronic Control Unit (ECU).
- the driving unit 140a may make the vehicle or the autonomous driving vehicle 100 run on the ground.
- the driving unit 140a may include an engine, a motor, a power train, a wheel, a brake, a steering device, and the like.
- the power supply unit 140b supplies power to the vehicle or the autonomous driving vehicle 100 , and may include a wired/wireless charging circuit, a battery, and the like.
- the sensor unit 140c may obtain vehicle status, surrounding environment information, user information, and the like.
- the sensor unit 140c includes an inertial measurement unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, an inclination sensor, a weight sensor, a heading sensor, a position module, and a vehicle forward movement.
- IMU inertial measurement unit
- a collision sensor a wheel sensor
- a speed sensor a speed sensor
- an inclination sensor a weight sensor
- a heading sensor a position module
- a vehicle forward movement / may include a reverse sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illuminance sensor, a pedal position sensor, and the like.
- the autonomous driving unit 140d includes a technology for maintaining a driving lane, a technology for automatically adjusting speed such as adaptive cruise control, a technology for automatically driving along a predetermined route, and a technology for automatically setting a route when a destination is set. technology can be implemented.
- the communication unit 110 may receive map data, traffic information data, and the like from an external server.
- the autonomous driving unit 140d may generate an autonomous driving route and a driving plan based on the acquired data.
- the controller 120 may control the driving unit 140a to move the vehicle or the autonomous driving vehicle 100 along the autonomous driving path (eg, speed/direction adjustment) according to the driving plan.
- the communication unit 110 may non/periodically acquire the latest traffic information data from an external server, and may acquire surrounding traffic information data from surrounding vehicles.
- the sensor unit 140c may acquire vehicle state and surrounding environment information.
- the autonomous driving unit 140d may update the autonomous driving route and the driving plan based on the newly acquired data/information.
- the communication unit 110 may transmit information about a vehicle location, an autonomous driving route, a driving plan, and the like to an external server.
- the external server may predict traffic information data in advance using AI technology or the like based on information collected from the vehicle or autonomous vehicles, and may provide the predicted traffic information data to the vehicle or autonomous vehicles.
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Abstract
Description
Claims (18)
- 무선 통신 시스템에서 제1 단말이 비선호 자원을 결정하기 위한 방법에 있어서,제3 단말로부터, 물리 사이드링크 제어 채널(Physical Sidelink Control Channel, PSCCH)에 대한 복조 참조 신호(PSCCH DeModulation Reference Signal, PSCCH DMRS)를 수신하는 단계;상기 제3 단말로부터, 상기 PSCCH를 수신하는 단계;상기 제3 단말로부터, 물리 사이드링크 공유 채널(Physical Sidelink Shared Channel, PSSCH)에 대한 복조 참조 신호(PSSCH DMRS)를 수신하는 단계;상기 PSCCH DMRS 및/또는 상기 PSSCH DMRS 중 적어도 하나에 대한 측정(measurement)에 기반하여, 제2 단말의 전송과 관련된 비선호 자원(non-preferred resource)을 결정하는 단계; 및상기 제2 단말에 상기 비선호 자원을 나타내는 조정 정보(coordination information)를 전송하는 단계;를 포함하되,상기 조정 정보는 물리 사이드링크 공유 채널(Physical Sidelink Shared channel, PSSCH)을 통해 전송되고,상기 PSCCH와 관련된 사이드 링크 제어 정보(Sidelink Control Information, SCI)에 기반하여 하나 이상의 자원들이 결정되며,상기 하나 이상의 자원들은 i) 상기 측정에 기반하는 참조 신호 수신 전력(Reference Signal Received Power, RSRP) 및 ii) 하나 이상의 RSRP 임계값들에 기초하여 상기 비선호 자원으로 결정되는 것을 특징으로 하는 방법.
- 제1 항에 있어서,상기 하나 이상의 RSRP 임계값들은 제1 RSRP 임계값 및 제2 RSRP 임계값을 포함하는 것을 특징으로 하는 방법.
- 제2 항에 있어서,상기 하나 이상의 자원들과 관련된 수신 단말이 상기 제1 단말인 것에 기초하여, 상기 하나 이상의 자원들은 상기 RSRP 및 상기 제2 RSRP 임계값에 기반하여 상기 비선호 자원으로 결정되는 것을 특징으로 하는 방법.
- 제3 항에 있어서,상기 RSRP가 상기 제2 RSRP 임계값보다 작은 것에 기초하여, 상기 하나 이상의 자원들은 상기 비선호 자원으로 결정되는 것을 특징으로 하는 방법.
- 제3 항에 있어서,상기 수신 단말이 상기 제1 단말과 다른 것에 기초하여, 상기 하나 이상의 자원들은 상기 RSRP 및 상기 제1 RSRP 임계값에 기반하여 상기 비선호 자원으로 결정되는 것을 특징으로 하는 방법.
- 제5 항에 있어서,상기 RSRP가 상기 제1 RSRP 임계값보다 큰 것에 기초하여, 상기 하나 이상의 자원들은 상기 비선호 자원으로 결정되는 것을 특징으로 하는 방법.
- 제1 항에 있어서,상기 비선호 자원의 결정을 위한 RSRP 임계값에 대한 정보는 미리 설정되거나 기지국으로부터 설정되는 것을 특징으로 하는 방법.
- 제2 항에 있어서,상기 제1 RSRP 임계값 또는 상기 제2 RSRP 임계값은 상기 SCI에 포함된 우선순위 필드(priority field)의 값에 기반하여 결정되는 것을 특징으로 하는 방법.
- 제1 항에 있어서,상기 조정 정보의 전송은 i) 미리 정의된 조건 또는 ii) 상기 조정 정보와 관련된 요청(request)에 기반하여 트리거되는 것을 특징으로 하는 방법.
- 제1 항에 있어서,상기 조정 정보는 제2 스테이지 SCI(second stage SCI) 또는 MAC-CE(Medium Access Control-Control Element)에 기반하는 것을 특징으로 하는 방법.
- 제1 항에 있어서,상기 SCI는 미리 정의된 시점 이전에 수신되며,상기 미리 정의된 시점은 상기 조정 정보의 전송 시점 및 상기 제1 단말의 프로세싱 타임에 기반하여 결정되는 것을 특징으로 하는 방법.
- 무선 통신 시스템에서 비선호 자원을 결정하는 제1 단말에 있어서,하나 이상의 송수신기;상기 하나 이상의 송수신기를 제어하는 하나 이상의 프로세서들; 및상기 하나 이상의 프로세서들에 동작 가능하게 접속된 하나 이상의 메모리들;을 포함하고,상기 하나 이상의 메모리들은, 상기 하나 이상의 프로세서들에 의해 실행되는 것에 기반하여, 동작들을 수행하는 지시(instruction)들을 저장하며,상기 동작들은,제3 단말로부터, 물리 사이드링크 제어 채널(Physical Sidelink Control Channel, PSCCH)에 대한 복조 참조 신호(PSCCH DeModulation Reference Signal, PSCCH DMRS)를 수신하는 단계;상기 제3 단말로부터, 상기 PSCCH를 수신하는 단계;상기 제3 단말로부터, 물리 사이드링크 공유 채널(Physical Sidelink Shared Channel, PSSCH)에 대한 복조 참조 신호(PSSCH DMRS)를 수신하는 단계;상기 PSCCH DMRS 및/또는 상기 PSSCH DMRS 중 적어도 하나에 대한 측정(measurement)에 기반하여, 제2 단말의 전송과 관련된 비선호 자원(non-preferred resource)을 결정하는 단계; 및상기 제2 단말에 상기 비선호 자원을 나타내는 조정 정보(coordination information)를 전송하는 단계;를 포함하되,상기 조정 정보는 물리 사이드링크 공유 채널(Physical Sidelink Shared channel, PSSCH)을 통해 전송되고,상기 PSCCH와 관련된 사이드 링크 제어 정보(Sidelink Control Information, SCI)에 기반하여 하나 이상의 자원들이 결정되며,상기 하나 이상의 자원들은 i) 상기 측정에 기반하는 참조 신호 수신 전력(Reference Signal Received Power, RSRP) 및 ii) 하나 이상의 RSRP 임계값들에 기초하여 상기 비선호 자원으로 결정되는 것을 특징으로 하는 제1 단말.
- 무선 통신 시스템에서 제1 단말이 비선호 자원을 결정하도록 제어하는 장치에 있어서,하나 이상의 프로세서들; 및상기 하나 이상의 프로세서들에 동작 가능하게 접속된 하나 이상의 메모리들;을 포함하고,상기 하나 이상의 메모리들은, 상기 하나 이상의 프로세서들에 의해 실행되는 것에 기반하여, 동작들을 수행하는 지시(instruction)들을 저장하며,상기 동작들은,제3 단말로부터, 물리 사이드링크 제어 채널(Physical Sidelink Control Channel, PSCCH)에 대한 복조 참조 신호(PSCCH DeModulation Reference Signal, PSCCH DMRS)를 수신하는 단계;상기 제3 단말로부터, 상기 PSCCH를 수신하는 단계;상기 제3 단말로부터, 물리 사이드링크 공유 채널(Physical Sidelink Shared Channel, PSSCH)에 대한 복조 참조 신호(PSSCH DMRS)를 수신하는 단계;상기 PSCCH DMRS 및/또는 상기 PSSCH DMRS 중 적어도 하나에 대한 측정(measurement)에 기반하여, 제2 단말의 전송과 관련된 비선호 자원(non-preferred resource)을 결정하는 단계; 및상기 제2 단말에 상기 비선호 자원을 나타내는 조정 정보(coordination information)를 전송하는 단계;를 포함하되,상기 조정 정보는 물리 사이드링크 공유 채널(Physical Sidelink Shared channel, PSSCH)을 통해 전송되고,상기 PSCCH와 관련된 사이드 링크 제어 정보(Sidelink Control Information, SCI)에 기반하여 하나 이상의 자원들이 결정되며,상기 하나 이상의 자원들은 i) 상기 측정에 기반하는 참조 신호 수신 전력(Reference Signal Received Power, RSRP) 및 ii) 하나 이상의 RSRP 임계값들에 기초하여 상기 비선호 자원으로 결정되는 것을 특징으로 하는 장치.
- 하나 이상의 명령어를 저장하는 하나 이상의 비일시적(non-transitory) 컴퓨터 판독 가능 매체에 있어서,상기 하나 이상의 명령어는, 하나 이상의 프로세서에 의해 실행되는 것에 기반하여, 동작들을 수행하고,상기 동작들은,제3 단말로부터, 물리 사이드링크 제어 채널(Physical Sidelink Control Channel, PSCCH)에 대한 복조 참조 신호(PSCCH DeModulation Reference Signal, PSCCH DMRS)를 수신하는 단계;상기 제3 단말로부터, 상기 PSCCH를 수신하는 단계;상기 제3 단말로부터, 물리 사이드링크 공유 채널(Physical Sidelink Shared Channel, PSSCH)에 대한 복조 참조 신호(PSSCH DMRS)를 수신하는 단계;상기 PSCCH DMRS 및/또는 상기 PSSCH DMRS 중 적어도 하나에 대한 측정(measurement)에 기반하여, 제2 단말의 전송과 관련된 비선호 자원(non-preferred resource)을 결정하는 단계; 및상기 제2 단말에 상기 비선호 자원을 나타내는 조정 정보(coordination information)를 전송하는 단계;를 포함하되,상기 조정 정보는 물리 사이드링크 공유 채널(Physical Sidelink Shared channel, PSSCH)을 통해 전송되고,상기 PSCCH와 관련된 사이드 링크 제어 정보(Sidelink Control Information, SCI)에 기반하여 하나 이상의 자원들이 결정되며,상기 하나 이상의 자원들은 i) 상기 측정에 기반하는 참조 신호 수신 전력(Reference Signal Received Power, RSRP) 및 ii) 하나 이상의 RSRP 임계값들에 기초하여 상기 비선호 자원으로 결정되는 것을 특징으로 하는 하나 이상의 비일시적(non-transitory) 컴퓨터 판독 가능 매체.
- 무선 통신 시스템에서 제2 단말이 조정 정보(coordination information)를 수신하는 방법에 있어서,제1 단말로부터, 상기 조정 정보를 수신하는 단계를 포함하되,상기 조정 정보는 상기 제2 단말의 전송과 관련된 비선호 자원(non-preferred resource)을 나타내고,상기 비선호 자원은 물리 사이드링크 제어 채널(PSCCH)에 대한 복조 참조 신호(PSCCH DMRS) 및/또는 물리 사이드링크 공유 채널(PSSCH)에 대한 복조 참조 신호(PSSCH DMRS) 중 적어도 하나에 대한 측정(measurement)에 기반하여 결정되고,상기 PSCCH DMRS 및 상기 PSSCH DMRS는 제3 단말로부터 상기 제1 단말로 전송되며,상기 PSCCH와 관련된 사이드 링크 제어 정보(Sidelink Control Information, SCI)에 기반하여 하나 이상의 자원들이 결정되고,상기 하나 이상의 자원들은 i) 상기 측정에 기반하는 참조 신호 수신 전력(Reference Signal Received Power, RSRP) 및 ii) 하나 이상의 RSRP 임계값들에 기초하여 상기 비선호 자원으로 결정되는 것을 특징으로 하는 방법.
- 제15 항에 있어서,상기 조정 정보는 물리 사이드링크 공유 채널(Physical Sidelink Shared channel, PSSCH)을 통해 수신되는 것을 특징으로 하는 방법.
- 제16 항에 있어서,상기 조정 정보는 제2 스테이지 SCI(second stage SCI) 또는 MAC-CE(Medium Access Control-Control Element)에 기반하는 것을 특징으로 하는 방법.
- 무선 통신 시스템에서 조정 정보(coordination information)를 수신하는 제2 단말에 있어서,하나 이상의 송수신기;상기 하나 이상의 송수신기를 제어하는 하나 이상의 프로세서들; 및상기 하나 이상의 프로세서들에 동작 가능하게 접속된 하나 이상의 메모리들;을 포함하고,상기 하나 이상의 메모리들은, 상기 하나 이상의 프로세서들에 의해 실행되는 것에 기반하여, 동작들을 수행하는 지시(instruction)들을 저장하며,상기 동작들은,제1 단말로부터, 상기 조정 정보를 수신하는 단계를 포함하되,상기 조정 정보는 상기 제2 단말의 전송과 관련된 비선호 자원(non-preferred resource)을 나타내고,상기 비선호 자원은 물리 사이드링크 제어 채널(PSCCH)에 대한 복조 참조 신호(PSCCH DMRS) 및/또는 물리 사이드링크 공유 채널(PSSCH)에 대한 복조 참조 신호(PSSCH DMRS) 중 적어도 하나에 대한 측정(measurement)에 기반하여 결정되고,상기 PSCCH DMRS 및 상기 PSSCH DMRS는 제3 단말로부터 상기 제1 단말로 전송되며,상기 PSCCH와 관련된 사이드 링크 제어 정보(Sidelink Control Information, SCI)에 기반하여 하나 이상의 자원들이 결정되고,상기 하나 이상의 자원들은 i) 상기 측정에 기반하는 참조 신호 수신 전력(Reference Signal Received Power, RSRP) 및 ii) 하나 이상의 RSRP 임계값들에 기초하여 상기 비선호 자원으로 결정되는 것을 특징으로 하는 제2 단말.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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KR1020237000640A KR102586390B1 (ko) | 2021-05-04 | 2022-05-04 | 무선 통신 시스템에서 비선호 자원의 결정을 위한 방법 및 그 장치 |
EP22799125.4A EP4336922A1 (en) | 2021-05-04 | 2022-05-04 | Method and apparatus for determining non-preferred resource in wireless communication system |
US18/103,344 US20230180266A1 (en) | 2021-05-04 | 2023-01-30 | Method and apparatus for determining non-preferred resource in wireless communication system |
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US20210029761A1 (en) * | 2018-06-14 | 2021-01-28 | Lg Electronics Inc. | Method and apparatus for performing sidelink communication by ue in nr v2x |
US20210050979A1 (en) * | 2019-08-15 | 2021-02-18 | Bing HUI | Resource Selection Based on Sensing Sidelinks by Wireless Device |
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KR102450886B1 (ko) * | 2016-08-22 | 2022-10-04 | 엘지전자 주식회사 | 무선 통신 시스템에서 단말의 측정을 통한 자원 선택 및 데이터 전송 방법 및 장치 |
US11690048B2 (en) * | 2020-09-21 | 2023-06-27 | Samsung Electronics Co., Ltd. | Method and apparatus for inter-user equipment coordination signaling |
US11825321B2 (en) * | 2020-09-23 | 2023-11-21 | Qualcomm Incorporated | Beam failure detection using mixed downlink reference signal |
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US20210029761A1 (en) * | 2018-06-14 | 2021-01-28 | Lg Electronics Inc. | Method and apparatus for performing sidelink communication by ue in nr v2x |
US20210050979A1 (en) * | 2019-08-15 | 2021-02-18 | Bing HUI | Resource Selection Based on Sensing Sidelinks by Wireless Device |
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CONVIDA WIRELESS: "On Resource Allocation for Power Saving in NR Sidelink", 3GPP DRAFT; R1-2103416, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210412 - 20210420, 7 April 2021 (2021-04-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP052178154 * |
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KR20230019205A (ko) | 2023-02-07 |
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