Terminal and communication method

Abstract

A terminal has a reception section that receives, from a base station, a first resource allocation related to transmission of data for terminal-to-terminal direct communication, and a transmission section that transmits, to another terminal that has received a second resource allocation related to reception of the data for the terminal-to-terminal direct communication from the base station or another base station, the data for the terminal-to-terminal direct communication, at least one of the first resource allocation and the second resource allocation being a resource allocation based on a configured grant (CG).

Description

Technical Field

[0001] This invention relates to terminals and communication methods in wireless communication systems. Background Technology

[0002] In LTE (Long Term Evolution) and its successors (e.g., LTE-A (LTE Advanced), NR (New Radio) (also known as 5G), D2D (Device to Device) technology, which allows terminals to communicate directly with each other without going through a base station (e.g., non-patent literature 1), is being studied.

[0003] D2D reduces the traffic load between terminals and base stations, enabling communication between terminals even when base stations cannot communicate, such as during disasters. Furthermore, in 3GPP (3rd Generation Partnership Project), D2D is referred to as a "sidelink," but in this specification, the more general term D2D is used. However, in the description of the implementation methods described later, "sidelink" may also be used as needed.

[0004] D2D communication is broadly divided into D2D discovery (also known as D2D discovery) for finding other communicable terminals and D2D communication (also known as D2D direct communication, D2D communication, etc.) for direct communication between terminals. Hereinafter, without specifically distinguishing between D2D communication, D2D discovery, etc., it will be simply referred to as D2D. Furthermore, the signals transmitted and received in D2D are called D2D signals. Various use cases involving services related to V2X (Vehicle to Everything) in NR are being investigated (e.g., non-patent literature 2).

[0005] Furthermore, in NR version 17 (e.g., non-patent document 3), the use of higher frequency bands than previous versions was investigated. For example, the set of applicable parameters, including subcarrier spacing, channel bandwidth, etc., in the frequency band from 52.6 GHz to 71 GHz, physical layer design, and faults envisioned in actual wireless communication were studied.

[0006] Existing technical documents

[0007] Non-patent literature

[0008] Non-patent document 1: 3GPP TS 38.211 V17.6.0 (2023-09)

[0009] Non-patent literature 2: 3GPP TR 22.886 V16.2.0 (2018-12)

[0010] Non-patent document 3: 3GPP TS 38.306 V17.6.0 (2023-09)

[0011] Non-patent document 4: 3GPP TS 37.213 V17.6.0 (2023-06) Summary of the Invention

[0012] The problem that the invention aims to solve

[0013] Non-terrestrial networks (NTNs) are being put into practical use, allowing terminals to assume they are within network coverage regardless of their geographical location. When this is assumed, the system can be designed with the network control side link in mind. Therefore, in next-generation communications, it is possible to achieve terminal-to-terminal communication with extremely high quality.

[0014] The present invention was made in view of the above-mentioned problems, and its purpose is to enable direct communication between network control terminals.

[0015] Methods for solving problems

[0016] According to the disclosed technology, a terminal is provided, comprising: a receiving unit that receives from a base station a first resource allocation related to the transmission of data for direct inter-terminal communication; and a transmitting unit that transmits the data for direct inter-terminal communication to other terminals that receive from the base station or other base stations a second resource allocation related to the reception of data for direct inter-terminal communication, wherein at least one of the first resource allocation and the second resource allocation is a resource allocation based on configuration authorization, i.e., CG.

[0017] Invention Effects

[0018] According to the disclosed technology, the network is able to control direct communication between terminals. Attached Figure Description

[0019] Figure 1 This is a diagram used to illustrate V2X.

[0020] Figure 2 This is a timing diagram showing the action example (1) of V2X.

[0021] Figure 3 This is a timing diagram showing the action example (2) of V2X.

[0022] Figure 4 This is a timing diagram showing the action example (3) of V2X.

[0023] Figure 5 This is a timing diagram showing the action example (4) of V2X.

[0024] Figure 6 This is a diagram illustrating an example of sensing action.

[0025] Figure 7 This is a flowchart used to illustrate an example of a preemption action.

[0026] Figure 8 This is a diagram illustrating an example of a preemptive action.

[0027] Figure 9 This is a diagram showing an example of some monitored actions.

[0028] Figure 10 This is a diagram used to illustrate an example of periodic partial monitoring.

[0029] Figure 11 This is a diagram used to illustrate an example of continuous monitoring.

[0030] Figure 12 This is a diagram illustrating an example of the frequency range in an embodiment of the present invention.

[0031] Figure 13 This is a diagram used to illustrate example (1) of LBT.

[0032] Figure 14 This is a diagram used to illustrate example (2) of LBT.

[0033] Figure 15 This is a diagram used to illustrate example (3) of LBT.

[0034] Figure 16 This is a diagram used to illustrate example (1) of broadband operation.

[0035] Figure 17 This is a diagram used to illustrate example (2) of broadband operation.

[0036] Figure 18 This is a diagram used to illustrate example (3) of broadband operation.

[0037] Figure 19 This is a diagram used to illustrate example (4) of broadband operation.

[0038] Figure 20 This is a diagram illustrating an example of a system in an embodiment of the present invention.

[0039] Figure 21 This is a diagram illustrating an example (1) of communication in an embodiment of the present invention.

[0040] Figure 22 This is a diagram illustrating an example (2) of communication in an embodiment of the present invention.

[0041] Figure 23 This is a diagram illustrating an example (3) of communication in an embodiment of the present invention.

[0042] Figure 24 This is a diagram illustrating an example of the functional structure of base station 10 in an embodiment of the present invention.

[0043] Figure 25 This is a diagram illustrating an example of the functional structure of terminal 20 in an embodiment of the present invention.

[0044] Figure 26 This is a diagram illustrating an example of the hardware structure of a base station 10 or a terminal 20 in an embodiment of the present invention.

[0045] Figure 27 This is a diagram illustrating an example of the structure of a vehicle 2001 according to an embodiment of the present invention. Detailed Implementation

[0046] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Furthermore, the embodiments described below are examples, and the application of the present invention is not limited to the embodiments described below.

[0047] In the operation of the wireless communication system according to embodiments of the present invention, existing technologies are appropriately used. These existing technologies include, for example, existing LTE, but are not limited to, existing LTE. Furthermore, unless otherwise stated, the term "LTE" as used herein has a broad meaning that includes LTE-Advanced and later versions (e.g., NR), or wireless LAN (Local Area Network).

[0048] In addition, in embodiments of the present invention, the duplex mode can be TDD (Time Division Duplex), FDD (Frequency Division Duplex), or other modes (e.g., Flexible Duplex).

[0049] Furthermore, in embodiments of the present invention, the "configure" wireless parameters can be pre-configured predetermined values, or wireless parameters notified from the base station 10 or the terminal 20.

[0050] Figure 1This is a diagram used to illustrate V2X. Within 3GPP, the implementation of V2X (Vehicle to Everything) or eV2X (enhanced V2X) by extending D2D functionality is being studied, and standardization is underway. Figure 1 As shown, V2X is a part of ITS (Intelligent Transport Systems). It is a collective term for V2V (Vehicle to Vehicle), which refers to communication between vehicles; V2I (Vehicle to Infrastructure), which refers to communication between vehicles and roadside units (RSUs) located beside the road; V2N (Vehicle to Network), which refers to communication between vehicles and ITS servers; and V2P (Vehicle to Pedestrian), which refers to communication between vehicles and mobile terminals held by pedestrians.

[0051] In addition, 3GPP is researching V2X using LTE or NR cellular communication and terminal-to-terminal communication. V2X using cellular communication is also referred to as cellular V2X. In NR V2X, research is underway to achieve high capacity, low latency, high reliability, and QoS (Quality of Service) control.

[0052] Regarding V2X for LTE or NR, it is envisioned that future research will extend beyond 3GPP specifications. For example, research could focus on ensuring interoperability, reducing costs through high-level implementations, methods for the combined use or handover of multiple RATs (Radio Access Technology), regulatory compliance in different countries, and methods for data acquisition, distribution, database management, and utilization on LTE or NR V2X platforms.

[0053] In embodiments of the present invention, the communication device is primarily envisioned to be mounted on a vehicle, but the embodiments of the present invention are not limited to this method. For example, the communication device may be a terminal held by a person, a device mounted on a drone or aircraft, or a base station, RSU, relay station (Relay Node), terminal with scheduling capabilities, etc.

[0054] In addition, SL (Sidelink) can also be distinguished based on UL (Uplink) or DL ​​(Downlink) and any one or a combination of 1) to 4) below. Alternatively, SL can also be other names.

[0055] 1) Resource allocation in the time domain

[0056] 2) Frequency domain resource allocation

[0057] 3) Reference synchronization signals (including SLSS (Sidelink Synchronization Signal))

[0058] 4) Reference signal used for path loss measurement in power control

[0059] Additionally, for SL or UL OFDM (Orthogonal Frequency Division Multiplexing), any of the following can be applied: CP-OFDM (Cyclic-Prefix OFDM), DFT-S-OFDM (Discrete Fourier Transform-Spread-OFDM), OFDM without transform precoding, or OFDM with transform precoding.

[0060] In LTE's SL (Send-On) architecture, two modes, Mode 3 and Mode 4, are specified for resource allocation for terminal 20. In Mode 3, transmission resources are dynamically allocated using the DCI (Downlink Control Information) sent from base station 10 to terminal 20. Additionally, Mode 3 also enables SPS (Semi-Persistent Scheduling). In Mode 4, terminal 20 autonomously selects transmission resources from the resource pool.

[0061] Furthermore, in the embodiments of the present invention, the slot can also be replaced by symbol, mini slot, subframe, radio frame, or TTI (Transmission Time Interval). Additionally, in the embodiments of the present invention, the cell can also be replaced by cell group, carrier component, BWP, resource pool, resource, RAT (Radio Access Technology), system (including wireless LAN), etc.

[0062] Furthermore, in embodiments of the present invention, terminal 20 is not limited to a V2X terminal, but can be any type of terminal performing D2D communication. For example, terminal 20 can be a user-held terminal such as a smartphone, or an IoT (Internet of Things) device such as a smart meter.

[0063] Furthermore, in NR-SL, it is envisioned that HARQ (Hybrid Automatic Repeat Request) will be supported in both unicast and multicast on the sidelink. In NR-V2X, SFCI (Sidelink Feedback Control Information) containing HARQ responses is defined. Additionally, the transmission of SFCI via PSFCH (Physical Sidelink Feedback Channel) is under investigation.

[0064] Furthermore, in the following description, PSFCH is assumed to be used for HARQ-ACK transmission in the side link, but this is just one example. For instance, PSCCH, PSSCH, and other channels can also be used for HARQ-ACK transmission in the side link.

[0065] For convenience, all information reported by terminal 20 in HARQ will be referred to as HARQ-ACK. This HARQ-ACK can also be called HARQ-ACK information. More specifically, the codebook used for the HARQ-ACK information reported from terminal 20 to base station 10, etc., will be called the HARQ-ACK codebook. The HARQ-ACK codebook specifies the bit string of the HARQ-ACK information. Furthermore, in addition to ACK (positive acknowledgment), NACK (negative acknowledgment) is also sent via HARQ-ACK.

[0066] Figure 2 This is a timing diagram illustrating the action example (1) of V2X. For example... Figure 2As shown, the wireless communication system according to the embodiments of the present invention may also have terminal 20A and terminal 20B. Furthermore, multiple user devices are actually present, but... Figure 2 Terminal 20A and Terminal 20B are shown as examples.

[0067] Hereinafter, without specifically distinguishing between terminals 20A, 20B, etc., they will only be referred to as "terminal 20" or "user device". Figure 2 As an example, the example shows a situation where both terminal 20A and terminal 20B are within the coverage area of ​​the cell. However, the actions in this embodiment of the invention can also be applied to situations where terminal 20B is outside the coverage area.

[0068] As described above, in this embodiment, terminal 20 is, for example, a device mounted in a vehicle such as an automobile, and has cellular communication functions as a UE in LTE or NR, as well as sidelink functions. Terminal 20 can also be a typical portable terminal (such as a smartphone). Alternatively, terminal 20 can also be an RSU. This RSU can be a UE-type RSU with UE functions, or a gNB-type RSU with base station functions.

[0069] Furthermore, the terminal 20 need not be a housing device. For example, even if various sensors are distributed throughout the vehicle, the device containing these various sensors can still be the terminal 20.

[0070] Furthermore, the processing of data transmitted via the sidelink of terminal 20 is essentially the same as that of UL transmission in LTE or NR. For example, terminal 20 scrambles and modulates the codewords of the transmitted data to generate complex-valued symbols, maps these complex-valued symbols to layer 1 or layer 2, and pre-codes them. Then, it maps the precoded complex-valued symbols to resource elements to generate a transmitted signal (e.g., a complex-valued time-domain SC-FDMA signal) and transmits it from each antenna port.

[0071] Furthermore, regarding base station 10, it has cellular communication functions as a base station in LTE or NR, and functions for enabling terminal 20 in this embodiment to communicate (e.g., resource pool setting, resource allocation, etc.). Additionally, base station 10 can also be an RSU (gNB type RSU).

[0072] Furthermore, in the wireless communication system according to the embodiments of the present invention, the signal waveform used by the terminal 20 in SL or UL can be OFDMA, SC-FDMA, or other signal waveforms.

[0073] As a synchronization signal in SL, terminal 20 transmits a Sidelink Synchronization Signal Block (S-SSB). The S-SSB can include S-PSS (Sidelink Primary Synchronization Signal), S-SSS (Sidelink Secondary Synchronization Signal), and PSBCH (Physical Sidelink Broadcast Channel). Furthermore, the names S-SSB, S-PSS, and S-SSS are examples; other names are also possible.

[0074] Terminal 20 transmits S-SSBs to other terminals 20 based on signals received from base station device 10, GNSS (Global Navigation Satellite System) signals, or signals received from other terminals 20. Furthermore, if terminal 20 is unable to transmit S-SSBs based on signals from base station device 10, GNSS, or any of the other terminals 20, terminal 20 may transmit autonomously determined S-SSBs to other terminals 20. The resources available for S-SSBs can be periodic time slots, also known as S-SSB opportunities.

[0075] In step S101, terminal 20A autonomously selects the resources used by PSCCH and PSSCH from a resource selection window with a predetermined period. The resource selection window can also be set by base station 10 for terminal 20. Here, the predetermined period of the resource selection window can be specified according to the terminal's implementation conditions, such as processing time or maximum allowable packet delay time, or it can be predetermined according to specifications. The predetermined period can also be referred to as a time-domain interval.

[0076] In steps S102 and S103, terminal 20A uses the resources autonomously selected in step S101 to send SCI (Sidelink Control Information) via PSCCH and / or PSSCH, and sends SL data via PSSCH. For example, terminal 20A can send PSCCH using frequency resources that are adjacent to or not adjacent to the frequency resources of PSSCH, within at least a portion of the time resources that are the same as the time resources of PSSCH.

[0077] Terminal 20B receives SCI (PSCCH and / or PSSCH) and SL data (PSSCH) sent from terminal 20A. The received SCI may contain information about the resources for PSFCH used by terminal 20B to send a HARQ-ACK for the received data. Terminal 20A may also include information about its own selected resources in the SCI. Furthermore, the resources available for PSFCH can be periodic time slots and the last symbol within each time slot (excluding the final symbol), also known as PSFCH opportunities.

[0078] In step S104, terminal 20B uses the resources of PSFCH determined based on the received SCI to send a HARQ-ACK for the received data to terminal 20A.

[0079] In step S105, if the HARQ-ACK received by terminal 20A in step S104 indicates a request for retransmission (i.e., NACK, a negative acknowledgment), terminal 20A will retransmit the PSCCH and PSSCH to terminal 20B. Terminal 20A may also use resources of its own choosing to retransmit the PSCCH and PSSCH.

[0080] Furthermore, steps S104 and S105 may be omitted if HARQ control with accompanying HARQ feedback is not performed.

[0081] Figure 3 This is a timing diagram illustrating a V2X action example (2). Blind retransmission, independent of HARQ control, can also be performed to improve the success rate of transmission or the distance reached.

[0082] In step S201, terminal 20A autonomously selects the resources used by PSCCH and PSSCH from a resource selection window with a predetermined period. The resource selection window can also be set by base station 10 for terminal 20.

[0083] In steps S202 and S203, terminal 20A uses the resources autonomously selected in step S201 to send SCI via PSCCH and / or PSSCH, and sends SL data via PSSCH. For example, terminal 20A can send PSCCH using frequency resources adjacent to the frequency resources of PSSCH in at least a portion of the same time resources as the time resources of PSSCH.

[0084] In step S204, terminal 20A uses the resources it autonomously selected in step S201 to retransmit SCI data based on PSCCH and / or PSSCH, as well as SL data based on PSSCH, to terminal 20B. This retransmission in step S204 can be performed multiple times.

[0085] Furthermore, step S204 can be omitted if blind retransmission is not performed.

[0086] Figure 4 This is a timing diagram illustrating an example of V2X operation (3). Base station 10 can perform sidelink scheduling. That is, base station 10 can determine the resources of the sidelink used by terminal 20 and send information representing those resources to terminal 20. Furthermore, when applying HARQ control with HARQ feedback, base station 10 can also send information representing the resources of PSFCH to terminal 20.

[0087] In step S301, base station 10 uses PDCCH to send DCI (Downlink Control Information) to terminal 20A, thereby performing SL scheduling. Hereinafter, for convenience, the DCI used for SL scheduling will be referred to as the SL scheduling DCI.

[0088] Additionally, in step S301, base station 10 intends to also use PDCCH to send DCI for DL ​​scheduling (also known as DL allocation) to terminal 20A. Hereinafter, for convenience, the DCI for DL ​​scheduling will be referred to as DL scheduling DCI. Terminal 20A, upon receiving the DL scheduling DCI, uses the resources specified by the DL scheduling DCI to receive DL data using PDSCH.

[0089] In steps S302 and S303, terminal 20A uses the resources specified by the SL scheduling DCI to send SCI (Sidelink Control Information) via PSCCH and / or PSSCH, and sends SL data via PSSCH. Alternatively, the SL scheduling DCI may specify only the resources for PSSCH. In this case, for example, terminal 20A may send PSCCH using frequency resources adjacent to the frequency resources of PSSCH, within at least a portion of the time resources that are the same as the time resources of PSSCH.

[0090] Terminal 20B receives SCI (PSCCH and / or PSSCH) and SL data (PSSCH) sent from terminal 20A. The SCI received using PSCCH and / or PSSCH contains information about the resources of PSFCH used by terminal 20B to send HARQ-ACK for the data reception.

[0091] The information about the resource is included in the DL scheduling DCI or SL scheduling DCI sent from base station 10 in step S301. Terminal 20A obtains the information about the resource from the DL scheduling DCI or SL scheduling DCI and includes it in the SCI. Alternatively, the DCI sent from base station 10 may not contain the information about the resource, and terminal 20A may autonomously include the information about the resource in the SCI before sending it.

[0092] In step S304, terminal 20B uses the resources of PSFCH determined based on the received SCI to send a HARQ-ACK for the received data to terminal 20A.

[0093] In step S305, terminal 20A, for example, at a timing specified by the DL scheduling DCI (or SL scheduling DCI) (e.g., timing of a time slot unit), uses the PUCCH (Physical uplink control channel) resource specified by the DL scheduling DCI (or the SL scheduling DCI) to send a HARQ-ACK, and base station 10 receives the HARQ-ACK. The codebook of this HARQ-ACK may contain HARQ-ACKs received from terminal 20B or HARQ-ACKs generated based on PSFCH that have not been received, and HARQ-ACKs for DL ​​data. However, in cases where there is no allocation of DL data, etc., it does not contain HARQ-ACKs for DL ​​data. In NR Rel.16, the codebook of this HARQ-ACK does not contain HARQ-ACKs for DL ​​data.

[0094] Furthermore, if HARQ control with accompanying HARQ feedback is not performed, steps S304 and / or S305 may also be omitted.

[0095] Figure 5 This is a timing diagram illustrating an example of V2X operation (4). As described above, in the NR side link, HARQ responses are supported via PSFCH. Furthermore, the PSFCH format can, for example, use the same format as PUCCH (Physical Uplink Control Channel) format 0. That is, the PSFCH format can be a sequence-based format where the PRB (Physical Resource Block) size is 1, and ACK and NACK are identified based on differences in sequence and / or cyclic shift. The PSFCH format is not limited to this. PSFCH resources can be configured at the end of a time slot or multiple symbols at the end. In addition, a period N is set or predefined for the PSFCH resources. The period N can be set or predefined in units of time slots.

[0096] exist Figure 5 In the diagram, the vertical axis corresponds to the frequency domain, and the horizontal axis corresponds to the time domain. The PSCCH can be configured with one symbol at the beginning of a time slot, or multiple symbols starting from the beginning, or multiple symbols starting from symbols other than the beginning. The PSFCH can be configured with one symbol at the end of a time slot, or multiple symbols at the end of a time slot. Furthermore, the terms "start of time slot" and "end of time slot" can omit the symbols used for AGC (Automatic Gain Control) and the symbols used for transmit / receive switching. That is, for example, when a time slot consists of 14 symbols, "start of time slot" and "end of time slot" can also refer to the first and last symbols among the 12 symbols excluding the first and last symbols. Figure 5 In the example shown, three sub-channels are configured in the resource pool, and two PSFCHs are configured after the three time slots in which the PSSCH is configured. The arrows from the PSSCH to the PSFCH indicate examples of PSFCHs associated with the PSSCH.

[0097] In NR-V2X multicast, where the HARQ response is multicast option 2 (sending ACK or NACK), it is necessary to determine the resources used for sending and receiving the PSFCH. For example... Figure 5As shown, in step S401, terminal 20A, acting as the transmitting terminal 20, performs multicast to terminals 20B, 20C, and 20D, acting as the receiving terminal 20, via SL-SCH (Sidelink Shared Channel). In the following step S402, terminal 20B sends a HARQ response to terminal 20A using PSFCH#B, terminal 20C uses PSFCH#C, and terminal 20D uses PSFCH#D. Here, as... Figure 5 As the example illustrates, when the number of available PSFCH resources is less than the number of receiving terminals 20 belonging to the group, it is necessary to decide how to allocate the PSFCH resources. Furthermore, the sending terminal 20 can also know the number of receiving terminals 20 in the multicast. Additionally, in multicast option 1, only NACK is sent as a HARQ response, without sending ACK.

[0098] Figure 6 This diagram illustrates an example of monitoring actions in NR. In resource allocation mode 2, terminal 20 selects resources for transmission. For example... Figure 6 As shown, terminal 20 performs monitoring within the monitoring window of the resource pool. Through monitoring, terminal 20 receives the resource reservation or resource assignment field contained in the SCI sent from other terminals 20, and identifies available resource candidates in the resource selection window within the resource pool based on this field. Then, terminal 20 randomly selects a resource from the available resource candidates.

[0099] In addition, such as Figure 6 As shown, the resource pool can be configured with a period. For example, the period could be 10240 milliseconds. Figure 6 It is time slot t0 SL To time slot t Tmax-1 SL An example of something being set up as a resource pool. The resource pool within each period can be defined as a region using a bitmap, for example.

[0100] In addition, such as Figure 6 As shown, let's assume that the transmission trigger in terminal 20 occurs in time slot n, and the priority of this transmission is p. TX Terminal 20 moves from time slot n-T0 to time slot nT proc,0 Within the monitoring window up to the immediately preceding time slot, for example, it can detect other terminals 20 performing priority p. RXThe transmission is processed. If an SCI is detected within the monitoring window and the RSRP (Reference Signal Received Power) exceeds a threshold, resources within the resource selection window corresponding to that SCI are excluded. Conversely, if an SCI is detected within the monitoring window and the RSRP is less than a threshold, resources within the resource selection window corresponding to that SCI are not excluded. This threshold can be, for example, based on priority p. TX and priority p RX A threshold Th is set or defined for each resource within the monitoring window. pTX,pRX .

[0101] In addition, such as Figure 6 The time slot t shown m SL In this way, for example, resources in the resource selection window that correspond to resources in the monitoring window that are not monitored due to transmission are excluded from the resource reservation information.

[0102] like Figure 6 As shown, in the resource selection window from time slot n+T1 to time slot n+T2, resources occupied by other UEs are identified, and resources that have been excluded become available resource candidates. If the set of available resource candidates is set as S... A Then in S A Even if the resource selection window is less than 20%, the threshold Th set for each resource in the monitoring window can still be applied. pTX,pRX Increase by 3dB and then perform resource identification again. That is, it is also possible to do so by setting the threshold Th... pTX，pRX The resource identification process is repeated, increasing the number of resources not excluded due to RSRP being less than a threshold, thus expanding the resource candidate set S. A It accounts for more than 20% of the resource selection window. In S A Even if the resource selection window is less than 20%, the threshold Th set for each resource in the monitoring window can be repeatedly applied. pTX，pRX The resource identification action is performed again after the value increases by 3dB.

[0103] The lower layer of terminal 20 can report S to the higher layer. A The higher levels of terminal 20 can also access S. A A random selection process is performed to determine the resources to be used. Terminal 20 can then use the determined resources to perform sidelink transmissions. For example, the higher layer could be the MAC layer, and the lower layer could be the PHY layer or the physical layer.

[0104] In the above Figure 6The text describes the actions of the sending terminal 20, but the receiving terminal 20 can also detect data transmissions from other terminals 20 based on monitoring or partial monitoring results, and receive data from those other terminals 20.

[0105] Figure 7 This is a flowchart illustrating an example of preemption in NR. Figure 8 This diagram illustrates an example of preemption in NR. In step S501, terminal 20 performs monitoring within the monitoring window. Monitoring can also be performed for a pre-defined period if terminal 20 is in a power-saving mode. Next, terminal 20 identifies each resource within the resource selection window based on the monitoring results and determines the set S of candidate resources. A Then, the terminal 20 selects the resource to be sent (S502). Next, the terminal 20 selects the resource candidate set S from the resource candidate set. A Select the resource set (r_0, r_1, ...) to determine whether preemption has occurred (S503). This resource set can be used to notify the PHY layer from a higher layer whether the resource has been preempted.

[0106] In step S504, terminal 20 in Figure 8 The timing T(r_0)-T3 shown is used to re-identify each resource within the resource selection window based on the monitoring results and determine the set S of resource candidates. A Then, based on priority, preemption is determined for the resource set (r_0, r_1, ...). For example, Figure 8 As shown, r_1, through re-monitoring, detected SCI sent from other terminal 20, which is not included in S A In the event of a valid preemption, if the priority value prio_RX, representing the SCI sent from another terminal 20, is lower than the priority value prio_TX, representing the transport block sent from this terminal, terminal 20 determines that resource r_1 has been preempted. Furthermore, the lower the priority value, the higher the priority. That is, if the priority value prio_RX, representing the SCI sent from another terminal 20, is higher than the priority value prio_TX, representing the transport block sent from this terminal, terminal 20 will not preempt resource r_1 from the SCI. A Alternatively, if preemption is only valid for a specific priority (e.g., sl-PreemptionEnable is any one of pl1, pl2, ..., pl8), that priority is set to prio_pre. In this case, if the value prio_RX, representing the priority of an SCI sent from another terminal 20, is lower than prio_pre and prio_RX is lower than the value prio_TX, representing the priority of a transport block sent from this terminal, terminal 20 determines that resource r_1 has been preempted.

[0107] In step S505, if the terminal 20 determines that preemption has occurred in step S504, it notifies the higher layer of the preemption, and the higher layer performs a resource reselection to end the preemption check.

[0108] Furthermore, in the case where a re-evaluation is performed instead of a preemption check, the set S of resource candidates is determined in step S504 above. A Afterwards, in S A If the resource set (r_0, r_1, ...) is not included in the resource set, the resource is not used, and a new resource is selected at a higher level.

[0109] Figure 9 This diagram illustrates an example of partial monitoring actions in LTE. In the LTE sidelink, partial monitoring is configured by higher layers, such as... Figure 9 As shown, terminal 20 selects resources and sends the data. Figure 9 As shown, terminal 20 performs partial monitoring on a portion of the monitoring window within the resource pool, i.e., the monitoring target. Through partial monitoring, terminal 20 receives the resource reservation field contained in the SCI sent from other terminals 20, and based on this field, identifies available resource candidates within the resource selection window of the resource pool. Then, terminal 20 randomly selects a resource from the available resource candidates.

[0110] Figure 9 It is subframe t0 SL To subframe t Tmax-1 SL An example of something being set up as a resource pool. A resource pool can, for example, define an object region using a bitmap. For example... Figure 9 As shown, it is set that the transmission trigger in terminal 20 is generated in subframe n. For example... Figure 9 As shown, in subframes n+T1 to n+T2, subframe t y1 SL To subframe t yY SL Y subframes can be set as resource selection windows.

[0111] Terminal 20 becomes a subframe t of length Y. y1-k×Pstep SL To subframe t yY-k×Pstep SL Among one or more monitored targets, for example, it is possible to detect other terminals 20 that are transmitting. k can, for example, be determined by a 10-bit bitmap. Figure 9 The image shows an example where the 3rd and 6th bits of the bitmap are set to "1" to indicate partial monitoring. That is, in... Figure 9 In the middle, subframe t y1-6×Pstep SL To subframe t yY-6×PstepSL and subframe t y1-3×Pstep SL To subframe t yY-3×Pstep SL It is set as a monitoring target. As mentioned above, the k-th bit of the bitmap can correspond to the subframe t. y1-k×Pstep SL To subframe t yY-k×Pstep SL The monitoring window. In addition, y i It corresponds to the index (1…Y) within the Y subframe.

[0112] Furthermore, k is set or predefined via a 10-bit bitmap, and P step It can be 100ms. However, in the case of SL communication using DL and UL carriers, P step It can also be set as (U / (D+S+U)) 100ms. U corresponds to the number of UL subframes, D corresponds to the number of DL subframes, and S corresponds to the number of special subframes.

[0113] If an SCI is detected among the aforementioned monitoring targets and the RSRP exceeds a threshold, resources within the resource selection window corresponding to the resource reservation field of that SCI are excluded. Conversely, if an SCI is detected among the monitoring targets and the RSRP is less than a threshold, resources within the resource selection window corresponding to the resource reservation field of that SCI are not excluded. This threshold can be, for example, based on the sending-side priority p. TX and receiving side priority p RX A threshold Th is set or defined for each resource within the monitoring target. pTX,pRX .

[0114] like Figure 9 As shown, in a resource selection window set to Y subframes within the interval [n+T1, n+T2], terminal 20 identifies resources occupied by other UEs, and resources excluding those resources become available resource candidates. Furthermore, the Y subframes can be discontinuous. If the set of available resource candidates is set as S... A Then in S A Even if the resources are less than 20% of the resources in the resource selection window, the threshold Th set for each resource of the monitoring target can still be applied. pTX,pRX The resource identification process is repeated after a 3dB increase.

[0115] That is, it can also be achieved by setting the threshold Th pTX,pRX The resource identification process is repeated upon raising the threshold, thereby increasing the number of resources that were not excluded due to RSRP being less than the threshold. Furthermore, S can also be measured. A The RSSI of each resource is calculated, and the resource with the smallest RSSI is added to set S. BIn the middle. It can also be repeated to change S. A The minimum resource included in RSSI is added to S B The actions in the process continue until the set of resource candidates S is reached. B Until it becomes more than 20% of the resource selection window.

[0116] The lower layer of terminal 20 can report S to the higher layer. B The higher levels of terminal 20 can also access S. B A random selection process is performed to determine the resources to be used. Terminal 20 can then use the determined resources to perform sidelink transmissions. Furthermore, once resources are secured, terminal 20 can also transmit a predetermined number of times (e.g., C). resel (Time) Resources are used periodically without monitoring.

[0117] In NR sidelinks, power saving based on random resource selection and partial sensing is being standardized. Terminal 20 using partial sensing performs reception and monitoring only in specific time slots within a monitoring window. That is, terminal 20 can also perform partial sensing by identifying resources only for a limited set compared to full sensing, and then selecting resources from that identified set. Alternatively, terminal 20 can perform random selection by not excluding resources from the resource selection window, but instead using the resources within the selection window as the identified resource set and selecting resources from that set.

[0118] Furthermore, the method of performing random selection at the resource selection time point and using monitoring information during re-evaluation or preemption checks can be treated as partial monitoring or as random selection.

[0119] Furthermore, as actions in monitoring, 1) and 2) shown below can also be applied. In addition, sensing and monitoring can be interchanged, and at least one of receiving RSRP measurements, obtaining reserved resource information, and obtaining priority information can also be included in this action.

[0120] 1) Periodic-based partial sensing

[0121] In mechanisms that monitor only a subset of time slots, the monitoring action for each time slot is determined based on the reservation period. Furthermore, the reservation period is a value associated with the resource reservation period field. Additionally, the period can also be replaced with periodicity.

[0122] 2) Continuous partial sensing

[0123] In mechanisms that monitor only a subset of time slots, the action for monitoring time slots is determined based on aperiodic reservation. Furthermore, aperiodic reservation is a value associated with the timeresource assignment field.

[0124] In addition, multiple resource allocation methods can be set for a specific resource pool. Furthermore, as a power-saving feature, SL-DRX (Discontinuous reception) is supported. That is, reception only occurs within a predetermined time interval.

[0125] As described above, partial monitoring is supported as one of the power-saving functions. In a resource pool where partial monitoring is configured, terminal 20 can perform the aforementioned periodic partial monitoring. Terminal 20 can receive information from base station 10 for configuring a resource pool in which partial monitoring is configured and periodic reservation is enabled.

[0126] Figure 10 This is a diagram used to illustrate an example of periodic partial monitoring. For example... Figure 10 As shown, Y candidate time slots are selected from the resource selection window [n+T1, n+T2] for resource selection.

[0127] You can also use t y SL As one of the Y candidate time slots, t y-k×Preserve SL The monitoring is performed on time slots that are periodically monitored.

[0128] P reserve It can correspond to all values ​​contained in the set or predefined collection sl-ResourceReservePeriodList. Alternatively, it can be P limited to a subset of sl-ResourceReservePeriodList. reserve The value of P can be set or predefined. reserveThe `sl-ResourceReservePeriodList` can be set for each transmission resource pool in resource allocation mode 2. Additionally, as a UE implementation, it is also possible to monitor periods included in the `sl-ResourceReservePeriodList` that are not part of the defined subset. For example, terminal 20 can also additionally monitor the opportunities corresponding to `P_RSVP_Tx`.

[0129] Regarding the value of k, terminal 20 can monitor the latest monitoring opportunity within a certain reservation period, either before the resource selection trigger time slot n or before the start time slot of the Y candidate time slots subject to processing time constraints. Additionally, terminal 20 can also additionally monitor periodic monitoring opportunities corresponding to a set of more than one k value. For example, the k value can be set to a value corresponding to the latest monitoring opportunity within a certain reservation period, either before the resource selection trigger time slot n or before the start time slot of the Y candidate time slots subject to processing time constraints, and a value corresponding to the monitoring opportunity immediately preceding the latest monitoring opportunity within that certain reservation period.

[0130] As described above, partial monitoring is supported as one of the power-saving functions. In a resource pool where partial monitoring is configured, terminal 20 can perform the aforementioned continuous partial monitoring. Terminal 20 can receive information from base station 10 for configuring a resource pool in which partial monitoring is configured and non-periodic reservation is enabled.

[0131] Figure 11 This is a diagram used to illustrate an example of continuous monitoring. For example... Figure 11 As shown, when the resource selection trigger is set to time slot n, terminal 20 selects Y candidate time slots for resource selection from the resource selection window [n+T1, n+T2]. Figure 11 This is an example of the case where Y=7. For example... Figure 11 As shown, the start of the Y candidate time slots is denoted as time slot t. y1 Let the next time slot be t. y2 ..., denote the last of the Y candidate time slots as time slot t. yY .

[0132] Terminal 20 in the interval [n+T A n+T B Monitoring will be conducted in [n+T] B Or n+T B Later (let's call it n+T) C Resource selection is performed within this range. Additionally, the aforementioned periodic partial monitoring can also be performed. Furthermore, the interval [n+T]... A n+T B ] of T A And T BIt can be any value. Additionally, n can be replaced with the index of any of the Y candidate time slots.

[0133] Additionally, the symbol [ can be replaced with the symbol (, and the symbol ] can be replaced with the symbol. Furthermore, for example, the interval [a, b] is the interval from time slot a to time slot b, including both time slot a and time slot b. For example, the interval (a, b) is the interval from time slot a to time slot b, excluding both time slot a and time slot b.

[0134] In addition, the candidate resources that will become the objects of resource selection are recorded as Y candidate time slots, but it can also be all time slots in the interval [n+T1, n+T2], or a portion of the time slots.

[0135] Furthermore, as a method to improve reliability and latency performance, inter-terminal coordination is standardized. For example, inter-terminal coordination method 1 and inter-terminal coordination method 2 shown below are standardized. Hereinafter, the terminal 20 that sends coordination information is referred to as UE-A, and the terminal 20 that receives coordination information is referred to as UE-B.

[0136] Inter-UE coordination method 1) For the transmission of UE-B, a preferred resource set and / or a non-preferred resource set are transmitted from UE-A to UE-B. Hereinafter, inter-UE coordination method 1 will also be referred to as IUC scheme 1.

[0137] Inter-UE coordination method 2) UE-A sends information to UE-B indicating resources that are expected to conflict with other transmitted or received resources and / or conflicts are detected, as indicated by the SCI received from UE-B. This information can be sent via PSFCH. Hereinafter, inter-UE coordination method 2 will also be referred to as IUC scheme 2 (Inter-UE coordination scheme 2).

[0138] Sidelinks in 3GPP Release 16 or Release 17 are standardized in terms of 1) and 2) as shown below.

[0139] 1) Environments where only 3GPP terminals exist in the ITS (Intelligent Transport Systems) domain.

[0140] 2) Environments where UL resources can be used for SL within the licensed bands of FR1 (Frequency range 1) and FR2 as defined in NR.

[0141] For sidelinks developed in 3GPP Release 18 and later, the inclusion of unlicensed bands as new targets is being studied. Examples include unlicensed bands such as the 5GHz-7GHz band and the 60GHz band.

[0142] Figure 12 This diagram illustrates examples of frequency bands used in wireless communication systems. For example, frequency bands operating above 52.6 GHz were studied in 3GPP Release 15 and Release 16 NR specifications. Furthermore, as... Figure 12 As shown, the currently operating FR (Frequency range) 1 is defined as the frequency band from 410MHz to 7.125GHz, the SCS (Subcarrier spacing) is 15, 30 or 60kHz, and the bandwidth is from 5MHz to 100MHz.

[0143] FR2-1 is a frequency band from 24.25 GHz to 52.6 GHz, with SCS using 60, 120, or 240 kHz, and bandwidths from 50 MHz to 400 MHz. For example... Figure 12 As shown, FR2-2 can be envisioned to range from 52.6 GHz to 71 GHz. Furthermore, it can also be envisioned to support frequency bands exceeding 71 GHz.

[0144] When using frequency bands exceeding 52.6 GHz, Cyclic Prefix-Orthogonal Frequency Division Multiplexing (CP-OFDM) / Discrete Fourier Transform-Spread (DFT-S-OFDM) with larger sub-carrier spacing (SCS) can be applied.

[0145] Furthermore, in high-frequency bands like FR2-2, the increase in inter-carrier phase noise becomes a problem. Therefore, a larger (wider) SCS or single-carrier waveform is required.

[0146] For example, as examples of unlicensed bands in the 5GHz-7GHz frequency band, consider 5.15GHz to 5.35GHz, 5.47GHz to 5.725GHz, and above 5.925GHz, etc.

[0147] For example, as examples of unlicensed band domains in the 60GHz band, consider 59GHz to 66GHz, 57GHz to 64GHz or 66GHz, 59.4GHz to 62.9GHz, etc.

[0148] In unauthorized band domains, various rules are defined to avoid affecting other systems or devices.

[0149] For example, in the 5GHz-7GHz frequency band, LBT (Listen before talk) is performed upon channel access. Base station 10 or terminal 20 performs power detection during a predetermined period before transmission. If the power exceeds a certain value, indicating that transmission from another device is detected, transmission is aborted (also known as LBT failure). Additionally, a maximum channel occupancy time (MCOT) is specified. MCOT is the maximum time interval during which transmission is allowed to continue after LBT has commenced; for example, it is 4ms in Japan.

[0150] In addition, as an Occupied channel bandwidth (OCB) requirement, when transmitting using a certain carrier bandwidth, at least X% of that frequency band must be used. For example, in Europe, it is required to use 80% to 100% of the Nominal Channel Bandwidth (NCB). The purpose of the OCB requirement is to ensure that power detection for channel access can be performed correctly.

[0151] Furthermore, regarding maximum transmit power and maximum power spectral density (PSD), to avoid excessive interference, transmission is specified to be conducted below predetermined transmit power levels. For example, in Europe, 23 dBm is considered the maximum transmit power in the 5150 MHz-5350 MHz band. Additionally, in Europe, 10 dBm / MHz is considered the maximum power spectral density in the same band.

[0152] For example, in the 60GHz band, LBT is performed during channel access. Base station 10 or terminal 20 performs power detection during a predetermined period before transmission, and aborts transmission if the power exceeds a certain value, i.e., if transmission from another device is detected. Furthermore, regarding maximum transmission power and maximum power spectral density, transmission is specified to be performed below a predetermined transmission power. Additionally, it is specified that the system has the capability to meet OCB requirements.

[0153] In NR, based on the differences in the time-direction behavior of LBT (during the monitoring period), the following four types of channel access procedures are defined. Furthermore, this monitoring is a different action from the sidelink monitoring described above, and is referred to as LBT monitoring for distinction.

[0154] Type 1) Performs variable-time LBT monitoring before transmission. Also known as Category 4 LBT.

[0155] Type 2A) performs LBT monitoring for 25 μs before transmission. Also known as Category 2 LBT.

[0156] Type 2B performs a 16μs LBT monitoring before transmission. It is also known as Category 2 LBT.

[0157] Type 2C) Starts transmission without LBT. Same as transmission with the licensed band field.

[0158] Figure 13 This is a diagram used to illustrate example (1) of LBT. Figure 13 This is an example of a Type 1 channel access procedure. Type 1 is further classified into four classes representing Channel Access Priority Class (CAPC) based on differences in LBT monitoring length. LBT monitoring is performed during the following two periods.

[0159] The first period is the prioritization period or deferduration, with a duration of 16 + 9 × m. p The length of [μs]. m p Fixed values ​​are specified for each channel access priority level.

[0160] The second period is the backoff process, which has a length of 9 × N [μs]. The value of N is randomly determined from a certain range (refer to the CWS adjustment process in Non-Patent Document 4). N is the initial value of the backoff counter, which decreases by 1 each time no power of a signal from another device is detected during the 9 [μs] period.

[0161] In the above, the 9μs LBT monitoring period can also be referred to as the LBT monitoring time slot period.

[0162] exist Figure 13 In the example, m p =3, retention period is 43μs. For example... Figure 13 As shown, the backoff counter is fixed during busy channel conditions. Additionally, as... Figure 13 As shown, in the event that an error is detected due to a conflict between the NR-U gNB and the wireless LAN node #2, the contention window size (CWS) in the NR-U gNB is increased from 3 to 13.

[0163] Figure 14 This is a diagram used to illustrate example (2) of LBT. Figure 14These are examples of Type 2A or Type 2B channel access procedures without random backoff. Type 2A sets a 25μs power detection interval before transmission, while Type 2B sets a 16μs power detection interval before transmission.

[0164] Figure 15 This is a diagram used to illustrate example (3) of LBT. Figure 15 This is an example of a type 2C channel access procedure. For example... Figure 15 As shown, no power detection is performed before transmission, and transmission is executed immediately after an interval of no more than 16 μs. The maximum transmission period can be 584 μs.

[0165] As mentioned above, NR-U supports multiple LBT types. In type 1, the initial value N of the backoff counter is set from 0 to a range determined by the channel access priority level p. p Random numbers within the specified interval. Table 1 shows the m values ​​specified according to each channel access priority level p in the UL. p CW p minimum value CW p,min CW p maximum value CW p,max Examples.

[0166] [Table 1]

[0167] As shown in Table 1, m is determined according to the channel access priority level p. p CW p,min CW p,max When p is 1, the LBT period calculated according to Table 1 is a minimum of 34 μs and a maximum of 88 μs. When p is 2, the LBT period calculated according to Table 1 is a minimum of 34 μs and a maximum of 160 μs. When p is 3, the LBT period calculated according to Table 1 is a minimum of 43 μs and a maximum of 9286 μs. When p is 4, the LBT period calculated according to Table 1 is a minimum of 79 μs and a maximum of 9286 μs. Furthermore, Table 1 is for UL applications.

[0168] The LBT type and channel access priority level can be determined based on notifications from base station 10, channel type, etc. The 25μs or 16μs gap can be set by base station 10's scheduling taking into account TA (Timing Advance) and CP extension.

[0169] The LBT applied to channel access operates on a predetermined bandwidth (e.g., 20MHz). Transmission can be performed even if no power is detected in the LBT channel containing each transmission. On the other hand, each CC in the Uu can be defined with a bandwidth wider than the LBT channel. That is, wideband operation is supported. Furthermore, the Uu is the radio interface between the UTRAN (Universal Terrestrial Radio Access Network) and the UE (User Equipment).

[0170] Figure 16 This is a diagram used to illustrate example (1) of broadband operation. Figure 17 This is a diagram used to illustrate example (2) of broadband operation. In the case of broadband operation in an unlicensed band domain, such as... Figure 16 or Figure 17 As shown, in a gNB, if the LBT channel is partially or fully successful, transmission can be allowed in the LBT channel where the LBT was successful. This can be achieved as follows: Figure 16 As shown, the gNB can send single, consecutive blocks, or as... Figure 17 As shown, gNB sends multiple non-contiguous blocks.

[0171] Regarding DL in the unlicensed band domain, DL type A is specified, which performs LBT on each channel, and DL type B, which performs LBT type 1 on randomly selected channels and LBT type 2A on the remaining channels.

[0172] DL type A is further classified into type A1 and type A2. In type A1, the contention window CWp is determined on a per-channel basis. In type A2, the CWp uses the largest of the CWp determined for each channel.

[0173] DL type B is further classified into type B1 and type B2. In type B1, a single CWp is applied to all channels. In type B2, the largest CWp among the CWp values ​​determined for each channel is used.

[0174] If some or all of the LBT channels in a gNB have successfully performed LBT, PDSCH transmission is permitted in the LBT channels where LBT was successful. A gNB can transmit a single block consecutively in the frequency direction, or it can transmit multiple blocks that are not consecutively in the frequency direction.

[0175] Figure 18 This is a diagram used to illustrate example (3) of broadband operation. Figure 19 This is a diagram used to illustrate example (4) of broadband operation. For example... Figure 18or Figure 19 As shown, transmission is permitted when the LBT in the UE successfully completes transmission in all LBT channels within the scheduled frequency band. Figure 19 As shown, in some LBT channels where LBT fails, transmission may be disallowed.

[0176] Regarding ULs in the unlicensed band domain, the LBT type is determined based on the instruction from the gNB. If LBT type 1 is indicated, and an LBT of the same type B as DL type B is performed in the immediately preceding UL, then LBT type 2 is applied, or LBT type 1 is applied. If an LBT fails in any LBT channel used for transmission, the UL is not transmitted in any LBT channel. Furthermore, LBT channels can also be referred to as RB (Resource Block) sets. LBT channels and RB sets can be interchanged.

[0177] In LTE and 5G, sidelinks are standardized. However, their practical application is limited, and there are other use cases using similar standards. Areas without network coverage also need to be considered, where the UE's autonomous resource selection is envisioned as the primary action. Therefore, it is difficult to differentiate communication quality from other standards.

[0178] The lack of incentive for network operators to use licensed domain resources for sidelinks makes it difficult for them to allow sidelink communication. There are significant differences between sidelink and Uu communication in terms of channel and signal structure and operational processes, resulting in high implementation barriers for sidelinks. From a cost-effectiveness perspective, there are situations where standard sidelink chips cannot be manufactured.

[0179] In 6G, there may be a need for terminal-to-terminal communication with extremely high quality. Figure 20 This is a diagram illustrating an example of a system in an embodiment of the present invention. For example... Figure 20 As shown, NTN (Non-Terrestrial Network) is being put into practical use, allowing terminals to assume they are within network coverage regardless of their geographical location.

[0180] exist Figure 20 In the example, NTN base station 10A includes terminals 20A and 20B within its coverage area, and terminals 20A and 20B perform sidelink communication based on network control. Base station 10C includes terminals 20C and 20D within its coverage area, and terminals 20C and 20D perform sidelink communication based on network control. Base station 10E includes terminal 20E within its coverage area, and base station 10F includes terminal 20F within its coverage area, and terminals 20E and 20F perform sidelink communication based on network control.

[0181] When the premise is that the system is within network coverage, it is possible to design the system under the premise of network control sidelink. That is, the same design as Uu's DL and UL can be applied to the specifications of the sidelink's channel, signal, and operation processes. As a result, it is possible to achieve superior communication quality, simplify terminal implementation, and achieve commonality with Uu's implementation. By expanding the number of UEs capable of performing sidelink operations, new services are generated, and the incentive to release licensed bandwidth to the sidelink is also increased.

[0182] When both the sending UE and the receiving UE are within network coverage, the mechanisms related to SL scheduling from the BS can be simplified and made more efficient. Furthermore, the mechanisms involved in CG (Configured Grant) and SPS (Semi-persistent scheduling), which are configured resources, can be simplified and made more efficient.

[0183] In embodiments of the present invention, at least one of the following can be contemplated.

[0184] A) Each terminal 20 can perform Uu communication with the TN (Terrestrial Network) and / or NTN, and perform SL communication based on the Uu communication.

[0185] B) A UE that cannot perform Uu communication with the TN and / or NTN may also be unable to perform SL communication, but there may be exceptions to this restriction. Regarding exceptions, for example, they may be limited to UEs that do not have a SIM (Subscriber Identity Module), or they may only be able to perform SL communication based on the instructions of a UE that performs SL communication according to Uu communication.

[0186] C) The cells connected to the sending UE and the receiving UE can be the same or different cells. In the case of Uu communication related to SL performed with different BSs, one can be a TN cell and the other an NTN cell.

[0187] D) Each cell can notify the UE whether Uu communication related to SL communication is possible in that cell, or whether SL communication based on that cell is possible. A UE performing SL communication may not connect to cells that do not support SL communication, and may also reduce the priority involved in connection and / or handover.

[0188] E) Each UE may prioritize connecting to and / or switching to the same cell as the SL communication counterpart.

[0189] F) The PLMN (Public Land Mobile Network) to which the sending UE and the receiving UE are connected can be the same or different PLMNs. Uu communication related to SL communication can also be performed between PLMNs in a common cell. A UE performing Uu communication related to SL communication can also perform Uu communication related to SL communication in a cell of the PLMN to which the SL communication counterpart belongs (e.g., a cell of a PLMN not to which its own device belongs). Furthermore, "connected" and "belonging" can be interchanged.

[0190] UE-X and UE-Y can perform Uu communication related to SL with the same BS. This Uu communication can also be resource settings related to CG or SPS. UE-Y can send feedback to the BS. The following describes the transmission related to CG or SPS from UE-X to UE-Y. In addition, UE-X and UE-Y can also perform the actions described below based on Uu communication with different BSs.

[0191] Action 1) UE-X resource settings

[0192] Action 1a) The BS can notify the UE-X of the configured resources related to SL transmission via RRC signaling and / or MAC-CE. For example, this notification may include time (symbol level), frequency (PRB level), code domain resources, spatial domain resources, MCS (Modulation and coding scheme), transmit power, DMRS parameters, PTRS parameters, CSI-RS transmission trigger, SRS trigger, HPN (HARQ process number), NDI (New Data Indicator), destination ID, broadcast type, transmission priority, repetition count, frequency hopping, information related to the UE-Y's location and / or orientation, beam, and information related to QCL and / or TCI. For example, the notification may also include information related to the periodicity of the resources.

[0193] Action 1b) UE-X can generate an SL data channel in the resources set by the BS and send it to the UE with the destination ID. Data, RS, and / or CRC can be scrambled based on the source ID and / or destination ID. The control channel may also not be sent from UE-X to UE-Y. In Action 1a), either a destination ID is given and the UE with that ID is selected as the sending partner, or multiple candidate destination IDs are given and UE-X selects one from the candidates as the sending partner. Alternatively, in Action 1a), the destination ID may not be provided, and UE-X may decide the sending partner. UE-X may skip sending if there is no SL data to send, or it may be required to perform the sending.

[0194] Action 1c) Based on this notification, UE-X may perform feedback to the BS on a per-resource basis (i.e., per transmission opportunity of the SL data channel). UE-X may send a HARQ-ACK to the BS regarding whether an SL transmission was performed. UE-X may also send a HARQ-ACK to the BS regarding whether a transmission that does not require feedback on the data (e.g., broadcasting) was performed.

[0195] In the case of performing SL communication based on Uu communication with a PLMN cell other than the PLMN cell to which UE-X belongs, the source ID of UE-X can be shared on the network side, reported by UE-X to the PLMN, or newly assigned from the PLMN. The source ID can also be used to perform Action 1a). Furthermore, the cell can also be replaced with a base station.

[0196] Action 1e) HPNs and / or NDIs can be managed and notified together with UL transmissions. For example, with 16 HPNs, each HPN can be used for both SL and UL transmissions up to a total of 16 processes. For example, after a UL transmission with HPN=2 and NDI=0, when an SL with HPN=2 and NDI=1 is transmitted, the HARQ buffer of that UL can be refreshed, and the SL transmission process can be performed as a process in that process number.

[0197] Action 2) Resource settings for UE-Y

[0198] Action 2a) The BS can notify the UE-Y of the configured resources related to SL reception via RRC signaling and / or MAC-CE. For example, this notification may include time (symbol level), frequency (PRB level), code domain resources, spatial domain resources, MCS (Modulation and coding scheme), transmit power, DMRS parameters, PTRS parameters, CSI-RS transmit trigger, SRS trigger, HPN (HARQ process number), NDI (New Data Indicator), destination ID, broadcast type, transmit priority, repetition count, frequency hopping, information related to the UE-X's location and / or orientation, beam, and information related to QCL and / or TCI. Additionally, this parameter may also include feedback timing, feedback resources, feedback path, feedback transmit power, feedback type, feedback priority, feedback repetition count, counter and / or total SAI (Sidelink assignment index), and whether feedback is required. Furthermore, this parameter may also include information related to resource periodicity.

[0199] Action 2b) UE-Y can receive the SL data channel from the UE with the source ID based on the resources set by the BS. Alternatively, it may not transmit the control channel. In Action 2a), it can also be envisioned that: a source ID is given, and UE-X with that ID is the transmitting source. In Action 2a), it can also be envisioned that: multiple candidate source IDs are given, and one of the candidates, UE-X, is the transmitting source. In Action 2a), it can also be envisioned that: no source ID is provided, and any UE can become the transmitting source. UE-Y may also be required to perform receiving and / or decoding actions.

[0200] Action 2c) Based on this notification, UE-Y may perform feedback corresponding to the SL data channel on a per-resource basis (i.e., per-transmission opportunity of the SL data channel). For example, UE-Y may send the feedback to the BS, or it may not perform the feedback. UE-Y may perform the feedback regardless of whether data is received, or it may perform the feedback only if a transmission to UE-Y is detected.

[0201] Action 2d) UE-Y may only perform the SL data channel reception action based on the BS scheduling (including configured resources) when the BS schedules it. Otherwise, the SL data channel reception action will not be performed in other timings or resources.

[0202] (Action 2e) When performing SL communication based on Uu communication with a PLMN cell other than the PLMN cell to which UE-Y belongs, the destination ID of UE-Y or multiple UEs including UE-Y (in the case of multicast or broadcast) can be shared on the network side, reported by UE-Y to the PLMN, or newly assigned from the PLMN. Action 1a) can also be performed using this destination ID.

[0203] Action 2f) HPNs and / or NDIs can be managed and notified together with DL reception. For example, when the number of HPNs is 16, each HPN can be used for SL and DL reception up to a total of 16 processes. For example, after receiving, receiving, and processing feedback for a DL allocation with HPN=2 and NDI=0, upon receiving an SL allocation with HPN=2 and NDI=1, the HARQ buffer of that DL allocation can be refreshed, and SL reception and feedback processing can be performed as processing in that process number.

[0204] Action 2g) Regarding communication from UE-X to UE-Y, if UE-Y does not perform Uu communication (e.g., if it does not have Uu functionality), the BS in Action 2) can be replaced by UE-X.

[0205] Action 2h) Regarding communication from UE-Y to UE-Z, if UE-Y and UE-Z do not perform Uu communication (e.g., if they do not have Uu functionality), UE-Y can replace BS with UE-X in Action 1), Action 3) (described later), and Action 4) (described later), and replace UE-X with UE-Y to perform the action. UE-Z can replace UE-X with UE-Y in Action 2), Action 3) (described later), and Action 4) (described later), and replace UE-Y with UE-Z to perform the action.

[0206] Action 3) Activate or deactivate (release)

[0207] The configured resources for action 1a) or action 2a) can be activated or deactivated via DCI or MAC-CE. Activation or deactivation commands can be sent from the BS to both UE-X and UE-Y. Actions 5) and 6) described below can also be applied to the activation or deactivation signal.

[0208] Action 4) Combination of DG (Dynamic grant) and CG (Configured grant)

[0209] One of UE-X and UE-Y can be provided with resources through DG-based scheduling, while the other can be provided with resources through CG-based resource setting (and / or activation).

[0210] Figure 21 This is a diagram illustrating an example (1) of communication in an embodiment of the present invention. Figure 21 As shown, for example, UE-X can send SL data using the pre-defined resources provided by the CG mechanism, and UE-Y can receive the SL data using the resources provided by the DG mechanism. In this case, the DCI scheduling for UE-Y can be sent only to UE-Y. UE-Y can then send feedback to the BS.

[0211] For example, UE-X can use the resources provided by the DG mechanism to send SL data, and UE-Y can use the resources provided by the CG mechanism to receive SL data. In this case, the DCI scheduling for UE-X can be sent only to UE-X.

[0212] Action 5) Figure 22 This is a diagram illustrating example (2) of communication in an embodiment of the present invention. Figure 22 As shown, the DCI in actions 3) and 4) can be a common DCI. That is, a common DCI can be sent to both UE-X and UE-Y.

[0213] Action 5a) The common DCI can be monitored in the common search space or in the UE’s inherent search space.

[0214] Action 5b) The RNTI (Radio Network Temporary Identifier) ​​corresponding to the common DCI can be applied to the common RNTI between UEs.

[0215] Action 5c) When the source ID contained in the DCI is its own device, the UE-X can perform SL transmission based on the DCI.

[0216] Action 5d) UE-Y can perform SL reception based on the DCI if the destination ID contained in the DCI is its own device or contains multiple (multicast or broadcast) devices of its own device.

[0217] Action 5e) UE-X and UE-Y can refer to the fields corresponding to their own device's actions, and ignore the remaining fields.

[0218] Action 5f) If the value in the DCI is a specific value, it can be determined that the communicating party is camped in another cell. For example, if all values ​​in fields related only to the sending UE are 0 or all values ​​are 1, UE-Y can be determined to be camped in another cell. For example, if all values ​​in fields related only to the receiving UE are 0 or all values ​​are 1, UE-X can be determined to be camped in another cell. The above cells can also be replaced with PLMN.

[0219] Action 6) Figure 23 This is a diagram illustrating an example (3) of communication in an embodiment of the present invention. Figure 23 As shown, the DCI in actions 3) and 4) can be dedicated DCI. That is, different DCIs can be sent to UE-X and UE-Y respectively.

[0220] Action 6a) This dedicated DCI can be monitored in the public search space or in the UE’s inherent search space.

[0221] Action 6b) The RNTI corresponding to this dedicated DCI can apply values ​​related to UE-X.

[0222] Action 6b′) The RNTI corresponding to this dedicated DCI can apply values ​​related to UE-Y or values ​​common to multiple UEs.

[0223] Action 6c) If the RNTI value associated with the DCI is the RNTI value of its own device, the UE-X can perform SL transmission based on the DCI.

[0224] Action 6d) When the RNTI value associated with the DCI is the RNTI value of its own device or a common value among multiple UEs (multicast or broadcast), UE-Y can perform SL reception based on the DCI.

[0225] Action 6d′) UE-Y can perform SL reception based on the DCI if the destination ID contained in the DCI is its own device or if it contains multiple (multicast or broadcast) devices of its own device.

[0226] Action 6e) may notify UE-X and / or UE-Y of information related to the cell or PLMN of the other party in the communication. For example, it may notify UE-X and / or UE-Y whether the other party is camped in the same cell, whether the other party belongs to the same PLMN, which cell the other party is camped in, and which PLMN the other party belongs to.

[0227] Furthermore, while the above embodiments utilize conventional SL channels and SL signal structures, they are not limited to this. For example, this embodiment can also be applied when an interlaced channel is used as a structure to meet OCB requirements.

[0228] Furthermore, the above embodiments can also be limited to applications that meet predetermined conditions. For example, they can be applied in association with predetermined SL channels or SL signals. For example, this embodiment can also be applied to any of PSCCH / PSSCH, PSFCH, S-SSB, and SL positioning RS. For example, it can also be applied based on predetermined settings or pre-set parameters. For example, in a resource pool, this embodiment can also be applied if the settings or pre-set parameters enable this embodiment. For example, this embodiment may not be applied if the LBT method associated with the second SL transmission is not type 1 or is no longer type 1.

[0229] In addition, to apply LBT types 2A, 2B, or 2C, an additional transmission (TX) can be performed immediately before the transmission P, such as CP extension.

[0230] In addition, UE capabilities related to whether or not this embodiment can be applied and actions can be defined, and can be reported to base station 10 and / or terminal 20, or not reported.

[0231] Furthermore, the SL transmission of the UE can be any one of PSCCH, PSSCH, PSFCH, S-SSB, or SL-PRS, and different channels or signals can be applied to each action in this embodiment.

[0232] Furthermore, at least one of the SL transmissions of the UE can be a UL transmission.

[0233] This embodiment can be applied to any of the following: resource selection, resource reselection, re-evaluation, and preemption check.

[0234] Furthermore, the method in the embodiments of the present invention is not limited to the above-described case of direct communication between terminals, and can also be applied to other similar cases.

[0235] The above embodiments are not limited to V2X terminals, but can also be applied to terminals that perform D2D communication.

[0236] According to the above embodiments, it is possible to send and receive SL data channels based on CG based on network resource allocation.

[0237] That is, the network can control direct communication between terminals.

[0238] (Device structure)

[0239] Next, an example of the functional structure of the base station 10 and terminal 20 performing the processes and actions described above will be explained. The base station 10 and terminal 20 include the functions implemented in the above embodiments. However, the base station 10 and terminal 20 may each possess only a portion of the functions described in the embodiments.

[0240] <Base Station 10>

[0241] Figure 24 This is a diagram illustrating an example of the functional structure of base station 10. (As shown...) Figure 24 As shown, the base station 10 includes a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. Figure 24 The functional structure shown is only one example. As long as the actions involved in the embodiments of the present invention can be performed, the functional distinctions and names of the functional parts can be arbitrary.

[0242] The transmitting unit 110 includes the function of generating a signal to be transmitted to the terminal 20 and wirelessly transmitting the signal. The receiving unit 120 includes the function of receiving various signals transmitted from the terminal 20 and obtaining, for example, higher-level information from the received signals. In addition, the transmitting unit 110 has the function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL reference signals, etc. to the terminal 20.

[0243] The setting unit 130 stores preset setting information and various setting information sent to the terminal 20 in a storage device, and reads it from the storage device as needed. The content of the setting information includes, for example, information related to D2D communication settings.

[0244] As described in the embodiment, the control unit 140 performs processing related to the settings for D2D communication with the terminal 20. Additionally, the control unit 140 sends D2D and DL communication scheduling to the terminal 20 via the transmitting unit 110. Furthermore, the control unit 140 receives information related to HARQ responses for D2D and DL communication from the terminal 20 via the receiving unit 120. Alternatively, the signal transmission-related functions of the control unit 140 may be included in the transmitting unit 110, and the signal reception-related functions of the control unit 140 may be included in the receiving unit 120.

[0245] Terminal 20

[0246] Figure 25 This is a diagram illustrating an example of the functional structure of terminal 20. (As shown...) Figure 25 As shown, the terminal 20 includes a transmitting unit 210, a receiving unit 220, a setting unit 230, and a control unit 240. Figure 25The functional structure shown is only one example. As long as the actions involved in the embodiments of the present invention can be performed, the functional distinctions and names of the functional parts can be arbitrary.

[0247] The transmitting unit 210 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 wirelessly receives various signals and obtains higher-layer signals from the received physical layer signals. Furthermore, the receiving unit 220 has the function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, or reference signals transmitted from the base station 10. Additionally, for example, as D2D communication, the transmitting unit 210 transmits PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel), etc., to other terminals 20, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH, or PSBCH from other terminals 20.

[0248] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station 10 or the terminal 20 in a storage device, and reads it from the storage device as needed. In addition, the setting unit 230 also stores preset setting information. The content of the setting information includes, for example, information related to D2D communication settings.

[0249] As described in the embodiment, the control unit 240 controls the D2D communication for establishing RRC connections with other terminals 20. Additionally, the control unit 240 performs processing related to power saving. Furthermore, the control unit 240 performs HARQ processing related to D2D and DL communication. Additionally, the control unit 240 sends information to the base station 10 regarding HARQ responses for D2D and DL communication scheduled by the base station 10 for other terminals 20. Furthermore, the control unit 240 can also schedule D2D communication for other terminals 20. Furthermore, the control unit 240 can autonomously select resources for D2D communication from the resource selection window based on sidelink monitoring results, and can also perform re-evaluation or preemption. Additionally, the control unit 240 performs power saving processing related to D2D communication transmission and reception. Furthermore, the control unit 240 performs processing related to inter-terminal coordination in D2D communication. Furthermore, the control unit 240 performs LBT processing related to D2D communication. Alternatively, the signal transmission-related functional units in the control unit 240 can be included in the transmitting unit 210, and the signal reception-related functional units in the control unit 240 can be included in the receiving unit 220.

[0250] (Hardware structure)

[0251] The block diagrams used in the description of the above embodiments ( Figure 24 and Figure 25 The diagram illustrates blocks organized by function. These functional blocks (structural units) are implemented through any combination of at least one of hardware and software. Furthermore, there are no particular limitations on the implementation method of each functional block. That is, each functional block can be implemented using a single device that is physically or logically combined, or by directly or indirectly (e.g., using wired, wireless, etc.) connecting two or more physically or logically separate devices. Functional blocks can also be implemented by combining software within one or more of the aforementioned devices.

[0252] The functions include judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, receiving, sending, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, and assigning, but are not limited to these. For example, the functional block (structural part) that performs the sending function is called the transmitting unit or transmitter. In short, as mentioned above, there are no particular limitations on the implementation method.

[0253] For example, in one embodiment of this disclosure, the base station 10, terminal 20, etc., can also function as a computer for processing the wireless communication method of this disclosure. Figure 26 This is a diagram illustrating an example of the hardware structure of a base station 10 and a terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 can be configured as a computer device that physically includes a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007, etc.

[0254] Furthermore, in the following description, the term "device" can be replaced with "circuit," "device," "unit," etc. The hardware structure of base station 10 and terminal 20 can be configured to include one or more of the devices shown in the figures, or it can be configured to not include any of them.

[0255] The functions of base station 10 and terminal 20 are implemented by reading predetermined software (program) into hardware such as processor 1001 and storage device 1002, so that processor 1001 performs calculations and controls the communication of communication device 1004 or controls at least one of reading and writing data in storage device 1002 and auxiliary storage device 1003.

[0256] The processor 1001 controls the computer as a whole by instructing the operating system to operate. The processor 1001 may also be a central processing unit (CPU) that includes interfaces with peripheral devices, control units, arithmetic units, registers, etc. For example, the control unit 140 and control unit 240 described above can also be implemented using the processor 1001.

[0257] Additionally, the processor 1001 reads programs (program code), software modules, or data from at least one of the auxiliary storage devices 1003 and communication devices 1004, and performs various processes accordingly. As a program, a program is used that causes the computer to perform at least a portion of the actions described in the above embodiments. For example, Figure 24 The control unit 140 of the base station 10 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. Alternatively, for example, Figure 25The control unit 240 of the terminal 20 shown can also be implemented by a control program stored in the storage device 1002 and operated in the processor 1001. Although it has been described that the various processes described above are executed by one processor 1001, the various processes described above can also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 can also be implemented by one or more chips. In addition, the program can also be sent from the network via a telecommunications line.

[0258] Storage device 1002 is a computer-readable recording medium, and may be composed of at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. Storage device 1002 may also be referred to as a register, cache, main memory (main storage device), etc. Storage device 1002 can store programs (program code), software modules, etc., that are executable for implementing the communication method according to one embodiment of this disclosure.

[0259] The auxiliary storage device 1003 is a computer-readable recording medium, such as at least one of the following: CD-ROM (CompactDisc ROM) or other optical discs, hard disks, floppy disks, magneto-optical discs (e.g., compact discs, digital multifunction discs, Blu-ray discs), smart cards, flash memory (e.g., cards, sticks, key drives), floppy disks, magnetic stripes, etc. The aforementioned storage medium may, for example, be a database, server, or other suitable media that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0260] Communication device 1004 is hardware (transceiver) used for communication between computers via at least one of a wired network and a wireless network. It is also referred to as a network device, network controller, network interface card (NIC), communication module, etc. Communication device 1004 may, for example, be configured to include high-frequency switches, duplexers, filters, frequency synthesizers, etc., to implement at least one of frequency division duplex (FDD) and time division duplex (TDD). For example, transceiver antennas, amplifiers, transceiver units, transmission path interfaces, etc., can also be implemented using communication device 1004. The transceiver unit may also be physically or logically separated into a transmitting unit and a receiving unit.

[0261] Input device 1005 is an input device that accepts input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, etc.). Output device 1006 is an output device that performs output to external sources (e.g., display, speaker, LED, etc.). Furthermore, input device 1005 and output device 1006 can also be integrated (e.g., a touch panel).

[0262] Furthermore, the processor 1001 and storage device 1002, among other devices, are connected via a bus 1007 for communicating information. The bus 1007 can be configured as a single bus or as different buses used between devices.

[0263] Furthermore, the base station 10 and the terminal 20 can be configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), or a FPGA (Field Programmable Gate Array), and can also use this hardware to implement part or all of the functional blocks. For example, the processor 1001 can also be implemented using at least one of these hardware components.

[0264] Figure 27 An example of the structure of vehicle 2001 is shown. For example... Figure 27 As shown, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a gearshift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021-2029, an information service unit 2012, and a communication module 2013. The various forms / implementations described in this disclosure can also be applied to communication devices mounted on the vehicle 2001, for example, to the communication module 2013.

[0265] The drive unit 2002 may be composed, for example, an engine, a motor, or a hybrid power system of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a steering wheel) and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0266] The electronic control unit 2010 consists of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (I / O port) 2033. Signals from various sensors 2021 to 2029 of the vehicle 2001 are input to the electronic control unit 2010. The electronic control unit 2010 can also be referred to as an ECU (Electronic Control Unit).

[0267] The signals from various sensors 2021 to 2029 include current signals from current sensor 2021 that senses the current of the motor, speed signals of the front or rear wheels obtained by speed sensor 2022, air pressure signals of the front or rear wheels obtained by air pressure sensor 2023, vehicle speed signals obtained by vehicle speed sensor 2024, acceleration signals obtained by acceleration sensor 2025, accelerator pedal depress signal obtained by accelerator pedal sensor 2029, brake pedal depress signal obtained by brake pedal sensor 2026, gear lever operation signals obtained by gear lever sensor 2027, and detection signals obtained by object detection sensor 2028 for detecting obstacles, vehicles, pedestrians, etc.

[0268] The Information Service Unit 2012 comprises various devices such as a car navigation system, audio system, speakers, television, and radio, used to provide (output) various information such as driving information, traffic information, and entertainment information, and one or more ECUs that control these devices. The Information Service Unit 2012 uses information obtained from external devices via a communication module 2013, etc., to provide various multimedia information and multimedia services to the occupants of the vehicle 2001. The Information Service Unit 2012 may include input devices that accept input from external sources (e.g., keyboard, mouse, microphone, switch, button, sensor, touch panel, etc.) and output devices that perform output to external sources (e.g., display, speaker, LED lights, touch panel, etc.).

[0269] The Driver Assistance System 2030 comprises various devices used to prevent accidents or reduce driver workload, such as millimeter-wave radar, LiDAR (Light Detection and Ranging), cameras, positioning devices (e.g., GNSS), map information (e.g., high-definition (HD) maps, autonomous vehicle (AV) maps), gyroscope systems (e.g., IMU (Inertial Measurement Unit), INS (Inertial Navigation System)), AI (Artificial Intelligence) chips, and AI processors, as well as one or more ECUs that control these devices. Furthermore, the Driver Assistance System 2030 transmits and receives various information via the communication module 2013 to achieve driver assistance or autonomous driving functions.

[0270] The communication module 2013 can communicate with the microprocessor 2031 and the components of the vehicle 2001 via the communication port. For example, the communication module 2013 can send and receive data with the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear shift lever 2006, front wheel 2007, rear wheel 2008, axle 2009, microprocessor 2031 in the electronic control unit 2010, memory (ROM, RAM) 2032, and sensors 2021 to 2029 in the vehicle 2001 via the communication port 2033.

[0271] The communication module 2013, controlled by the microprocessor 2031 of the electronic control unit 2010, is a communication device capable of communicating with external devices. For example, it can transmit and receive various types of information with external devices via wireless communication. The communication module 2013 can be located inside or outside the electronic control unit 2010. External devices can be, for example, base stations, mobile stations, etc.

[0272] The communication module 2013 can wirelessly transmit to an external device at least one of the signals input to the electronic control unit 2010 from the various sensors 2021-2028, information obtained based on those signals, and information obtained via the information service unit 2012 based on input from an external source (user). The electronic control unit 2010, the various sensors 2021-2028, and the information service unit 2012 can also be referred to as input units that receive input. For example, the PUSCH transmitted by the communication module 2013 can contain information based on the aforementioned input.

[0273] The communication module 2013 receives various information (traffic information, signal information, vehicle-to-vehicle information, etc.) sent from external devices and displays it on the information service unit 2012 provided by the vehicle 2001. The information service unit 2012 can also be referred to as an output unit for outputting information (for example, outputting information to devices such as displays and speakers based on the PDSCH received by the communication module 2013 (or data / information decoded from the PDSCH). In addition, the communication module 2013 stores the various information received from external devices in a memory 2032 available to the microprocessor 2031. The microprocessor 2031 can also control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, gear lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided by the vehicle 2001 based on the information stored in the memory 2032.

[0274] (Summary of implementation methods)

[0275] As described above, according to an embodiment of the present invention, a terminal is provided, comprising: a receiving unit that receives from a base station a first resource allocation related to the transmission of data for direct inter-terminal communication; and a transmitting unit that transmits the data for direct inter-terminal communication to other terminals that receive from the base station or other base stations a second resource allocation related to the reception of data for direct inter-terminal communication, wherein at least one of the first resource allocation and the second resource allocation is a resource allocation based on configuration authorization, i.e., CG.

[0276] Based on the above structure, it is possible to send and receive SL data channels based on CG, according to network resource allocation. That is, the network can control direct communication between terminals.

[0277] Alternatively, the transmitting unit can transmit data for direct inter-terminal communication to the other terminals without a control channel. Based on this structure, it is possible to transmit and receive SL data channels based on CG, according to network resource allocation.

[0278] Alternatively, the transmitting unit may select one of a plurality of destination IDs received from the base station and determine it as the sending counterpart. Based on this structure, CG-based SL data channels can be transmitted and received based on network resource allocation.

[0279] Alternatively, the resource allocation related to the transmission of data for direct communication between the terminals and the allocation related to the reception of data for direct communication between the terminals are both based on CG resource allocation, and either the activation or deactivation of the CG is notified by receiving the same control signal. According to this structure, CG-based SL data channels can be transmitted and received based on network resource allocation.

[0280] Alternatively, one of the resource allocation related to the transmission of data for direct communication between the terminals and the allocation related to the reception of data for direct communication between the terminals may be based on CG resource allocation, while the other may be based on dynamic licensing (DG) resource allocation. According to this structure, CG-based SL data channels can be transmitted and received based on network resource allocation.

[0281] Furthermore, according to an embodiment of the present invention, a communication method is provided, wherein a terminal performs the following process: receiving a first resource allocation related to the transmission of data for direct inter-terminal communication from a base station; and transmitting the data for direct inter-terminal communication to other terminals that receive a second resource allocation related to the reception of data for direct inter-terminal communication from the base station or other base stations, wherein at least one of the first resource allocation and the second resource allocation is a resource allocation based on configuration authorization, i.e., CG.

[0282] Based on the above structure, it is possible to send and receive SL data channels based on CG, according to network resource allocation. That is, the network can control direct communication between terminals.

[0283] (Supplement to the implementation method)

[0284] The embodiments of the present invention have been described above, but the disclosed invention is not limited to such embodiments. Those skilled in the art should understand various modifications, alterations, substitutions, and replacements. Specific numerical examples have been used to facilitate understanding of the invention, but unless otherwise specified, these values ​​are merely examples, and any appropriate values ​​may be used. The distinctions between items in the above description are not essential to the present invention. Items described in two or more items may be combined as needed, and items described in one item may be applied to items described in another item (as long as there is no contradiction). The boundaries of functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of physical components. Multiple functional units may be operated by a single physical component, or a single functional unit may be operated by multiple physical components. Regarding the processing described in the embodiments, the order of processing may be interchanged unless there is a contradiction. For ease of explanation, a functional block diagram is used to illustrate the base station 10 and terminal 20, but such a device may also be implemented by hardware, software, or a combination thereof. The software operating according to the embodiments of the present invention via the processor of the base station 10 and the software operating according to the embodiments of the present invention via the processor of the terminal 20 may also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server and other suitable storage media, respectively.

[0285] Furthermore, the notification of information is not limited to the forms / implementations described in this disclosure, and other methods may also be used. For example, information notification may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or combinations thereof. Additionally, RRC signaling may be referred to as an RRC message, for example, it may also be an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0286] The various forms / implementations described in this disclosure can also be applied to systems utilizing LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or a decimal)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The system may include at least one of 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), other suitable systems, and next-generation systems based on these systems that have been extended, modified, created, or specified. Additionally, multiple systems may be combined (e.g., a combination of at least one of LTE and LTE-A with 5G, etc.) for application.

[0287] The processing procedures, timing, and flow of the various forms / implementations described in this specification may be rearranged in order, provided there is no contradiction. For example, the elements of various steps are indicated using an illustrative order for the methods described in this disclosure, but are not limited to the specific order indicated.

[0288] In this specification, certain actions performed by base station 10 may sometimes also be performed by its upper node, depending on the circumstances. In a network consisting of one or more network nodes having base station 10, it is obvious that various actions performed to communicate with terminal 20 can be performed by at least one of base station 10 and other network nodes besides base station 10 (e.g., considering MME or S-GW, but not limited to these). The above example illustrates the case where there is one other network node besides base station 10, but other network nodes can also be a combination of multiple other network nodes (e.g., MME and S-GW).

[0289] The information or signals described in this disclosure can be output from a higher (or lower) layer to a lower (or higher) layer. They can also be input or output via multiple network nodes.

[0290] Input or output information can be stored in a specific location (e.g., memory) or managed using a management table. Input or output information can be overwritten, updated, or appended. Output information can also be deleted. Input information can also be sent to other devices.

[0291] The determination in this disclosure can be made by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by a comparison of numerical values ​​(e.g., a comparison with a predetermined value).

[0292] Software, whether called software, firmware, middleware, microcode, hardware description language, or by other names, should be broadly interpreted as referring to commands, command sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0293] In addition, software, commands, information, etc., can be sent and received via a transmission medium. For example, when software is sent from a webpage, server, or other remote source using at least one of wired technologies (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) etc.) and wireless technologies (infrared, microwave, etc.), at least one of these wired and wireless technologies is included within the definition of a transmission medium.

[0294] The information, signals, etc., described in this disclosure can also be represented using any of a variety of different technologies. For example, the data, commands, instructions, information, signals, bits, symbols, chips, etc., that may be involved in the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0295] Furthermore, the terms used in this disclosure and those necessary for understanding this disclosure may be replaced with terms that have the same or similar meanings. For example, at least one of the channel and symbol may also be a signal (signaling). Additionally, a signal may also be a message. Furthermore, a component carrier (CC) may also be referred to as carrier frequency, cell, frequency carrier, etc.

[0296] The terms “system” and “network” as used in this disclosure are used interchangeably.

[0297] Furthermore, the information, parameters, etc., described in this disclosure can be represented using absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources can be indicated using indexes.

[0298] The names used for the above parameters are non-limiting in any respect. Furthermore, the formulas, etc., using these parameters sometimes differ from those explicitly disclosed in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by all appropriate names, therefore the various names assigned to these channels and information elements are non-limiting in any respect.

[0299] In this disclosure, the terms "base station (BS)," "wireless base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" are used interchangeably. Sometimes, terms such as macro cell, small cell, femtocell, and picocell are also used to refer to base stations.

[0300] A base station can accommodate one or more (e.g., three) cells. When a base station accommodates multiple cells, its coverage area can be divided into several smaller areas, each of which can also provide communication services through a base station subsystem (e.g., a small indoor base station (RRH: Remote Radio Head)). Terms such as "cell" or "sector" refer to a portion or all of the coverage area of ​​at least one of the base station and base station subsystem providing communication services within that coverage area.

[0301] In this disclosure, the base station sending information to the terminal can also be replaced by the base station instructing the terminal on information-based control / actions.

[0302] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," and "terminal" are used interchangeably.

[0303] For mobile stations, those skilled in the art sometimes also use the following terms: subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, client, or some other appropriate terms.

[0304] At least one of the base station and mobile station can also be referred to as a transmitting device, receiving device, communication device, etc. Furthermore, at least one of the base station and mobile station can also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body refers to a movable object with an arbitrary speed of movement. It also includes situations where the mobile body is stationary. Examples of mobile bodies include, but are not limited to, vehicles, transport vehicles, automobiles, motorcycles, bicycles, connected cars, excavators, bulldozers, wheel loaders, dump trucks, forklifts, trains, buses, rear cars, rickshaws, ships (ships and other watercraft), airplanes, rockets, artificial satellites, Drone (registered trademark), multi-rotor helicopters, quadcopter helicopters, balloons, and objects mounted on them. Additionally, the mobile body can also be a mobile body that moves autonomously based on operating commands. It can be a means of transportation (e.g., car, airplane), a mobile body that moves unmanned (e.g., drone, autonomous vehicle), or a robot (humanized or unmanned). Furthermore, at least one of the base station and mobile station also includes devices that do not necessarily move during communication operations. For example, at least one of the base station and the mobile station can be an IoT (Internet of Things) device such as a sensor.

[0305] Furthermore, the base station in this disclosure can also be replaced by a user terminal. For example, the communication between the base station and the user terminal can be replaced by communication between multiple terminals 20 (e.g., D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.), and various forms / implementations of this disclosure can also be applied. In this case, the terminal 20 can also be configured to have the functions of the base station 10 described above. In addition, terms such as "uplink" and "downlink" can be replaced with terms corresponding to inter-terminal communication (e.g., "side"). For example, uplink channel, downlink channel, etc., can also be replaced with side channel.

[0306] Similarly, the user terminal in this disclosure can also be replaced by a base station. In this case, the base station can also be configured to have the functions of the aforementioned user terminal.

[0307] As used in this disclosure, terms such as "determining" and "determining" sometimes encompass a variety of actions. For example, "determining" or "determining" may include actions such as judging, calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or other data structure), and ascertaining, which are considered as actions of "determining" or "determining." Furthermore, "determining" or "determining" may include actions such as receiving (e.g., receiving information), transmitting (e.g., sending information), inputting, outputting, and accessing (e.g., accessing data in memory), which are considered as actions of "determining" or "determining." Additionally, "determining" or "determining" may include actions such as resolving, selecting, choosing, establishing, and comparing, which are considered as actions of "determining" or "determining." That is, "judgment" and "decision" can include matters that are considered as having been "judged" or "decided". In addition, "judgment (decision)" can also be replaced by "assuming", "expecting", "considering", etc.

[0308] The terms “connected,” “coupled,” or any variations thereof are intended to indicate any direct or indirect connection or combination between two or more elements, including cases where there is one or more intermediate elements between the two elements that are “connected” or “coupled.” The combination or connection between elements can be physical, logical, or a combination of these. For example, “access” can be used instead of “connected.” In the context of this disclosure, it can be understood that two elements are “connected” or “coupled” to each other using at least one of one or more wires, cables, and printed electrical connections, and, as some non-limiting and non-inclusive examples, using electromagnetic energy with wavelengths in the wireless frequency domain, microwave region, and light (including both visible and invisible regions) to “connect” or “couple” to each other.

[0309] The reference signal can be simply called RS (Reference Signal), or, depending on the standard applied, pilot.

[0310] As used in this disclosure, the word "based on" does not mean "based on only" unless otherwise expressly stated. In other words, the word "based on" means both "based on only" and "based on at least".

[0311] Any reference to elements using the designations "first," "second," etc., as used in this disclosure does not necessarily limit the number or order of these elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Therefore, references to the first and second elements do not imply that only two elements can be taken, or that the first element must precede the second element in any form.

[0312] Alternatively, the "unit" in the structure of the above devices can be replaced with "section", "circuit", "equipment", etc.

[0313] When the terms "include," "including," and their variations are used in this disclosure, these terms, like the term "comprising," imply inclusion. Furthermore, the term "or" as used in this disclosure does not refer to XOR.

[0314] A radio frame can consist of one or more frames in the time domain. Each frame in the time domain can be called a subframe. A subframe can also consist of one or more time slots in the time domain. A subframe can be a fixed duration (e.g., 1 ms) independent of the parameter set (numerology).

[0315] A parameter set can be communication parameters applied to at least one of the transmission and reception of a signal or channel. For example, a parameter set can represent at least one of the following: Subcarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, and specific windowing processing performed by the transceiver in the time domain.

[0316] In the time domain, a time slot can be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.). A time slot can be a time unit based on a set of parameters.

[0317] A time slot can contain multiple mini-time slots. Each mini-time slot can consist of one or more symbols in the time domain. Additionally, a mini-time slot can also be called a sub-time slot. A mini-time slot can consist of fewer symbols than a time slot. PDSCH (or PUSCH) transmitted in time units larger than mini-time slots can be called PDSCH (or PUSCH) mapping type (type) A. PDSCH (or PUSCH) transmitted using mini-time slots can be called PDSCH (or PUSCH) mapping type (type) B.

[0318] Radio frames, subframes, time slots, mini-time slots, and symbols all represent time units for transmitting signals. Radio frames, subframes, time slots, mini-time slots, and symbols can each be referred to by other corresponding names.

[0319] For example, a subframe can be called a Transmission Time Interval (TTI), multiple consecutive subframes can also be called a TTI, and a time slot or a mini-time slot can also be called a TTI. That is to say, at least one of a subframe and a TTI can be a subframe (1ms) in existing LTE, a period shorter than 1ms (e.g., symbols 1-13), or a period longer than 1ms. Furthermore, the unit representing TTI may not be called a subframe, but rather a time slot, mini-time slot, etc.

[0320] Here, TTI refers, for example, to the smallest unit of time for scheduling in wireless communication. For instance, in an LTE system, the base station schedules the allocation of radio resources (bandwidth, transmit power, etc., available to each terminal 20) in units of TTI. However, the definition of TTI is not limited to this.

[0321] The Time Interval (TTI) can be a unit of time for transmitting channel-coded data packets (transmission blocks), code blocks, codewords, etc., or it can be a processing unit such as scheduling or link adaptation. Furthermore, when a TTI is given, the actual time interval (e.g., the number of symbols) that the transmission block, code block, codeword, etc., are mapped to can be shorter than the TTI.

[0322] Furthermore, when one time slot or one mini time slot is referred to as a TTI, more than one TTI (i.e., more than one time slot or more than one mini time slot) can become the minimum time unit for scheduling. In addition, the number of time slots (mini time slots) constituting the minimum time unit for scheduling can also be controlled.

[0323] A TTI with a duration of 1ms can also be called a normal TTI (TTI in LTE Rel.8-12), a long TTI, a normal subframe, a long subframe, or a time slot. A TTI shorter than a normal TTI can also be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini time slot, a sub-time slot, or a time slot.

[0324] Furthermore, for long TTIs (e.g., normal TTIs, subframes, etc.), they can be replaced with TTIs with a duration of more than 1ms. For short TTIs (e.g., shortened TTIs, etc.), they can be replaced with TTIs with a duration of less than long TTIs but more than 1ms.

[0325] A resource block (RB) is a unit of resource allocation in both the time and frequency domains. In the frequency domain, it can contain one or more consecutive subcarriers. The number of subcarriers contained in an RB can be the same regardless of the parameter set, for example, it can be 12. The number of subcarriers contained in an RB can also be determined based on the parameter set.

[0326] In addition, the time domain of an RB can contain one or more symbols, which can be a time slot, a mini-time slot, a subframe, or a TTI in length. A TTI, a subframe, etc., can each be composed of one or more resource blocks.

[0327] In addition, one or more RBs can also be called Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB Pair, RB Pair, etc.

[0328] In addition, a resource block can consist of one or more resource elements (REs). For example, one RE can be a radio resource area consisting of one subcarrier and one symbol.

[0329] The Bandwidth Part (BWP) (also known as partial bandwidth, etc.) can also represent a subset of contiguous common resource blocks (RBs) used for a certain parameter set in a certain carrier. Here, common RBs can be determined by indexing RBs based on a common reference point of that carrier. PRBs can be defined and numbered within a BWP.

[0330] A BWP can include a UL BWP and a DL BWP. Terminal 20 can also be configured with one or more BWPs within a single carrier.

[0331] At least one of the configured BWPs can be active, and terminal 20 does not intend to transmit or receive predetermined signals / channels outside of the active BWP. Furthermore, the terms "cell," "carrier," etc., used in this disclosure can be replaced with "BWP."

[0332] The structures of radio frames, subframes, time slots, mini-time slots, and symbols described above are merely illustrative. For example, the number of subframes contained in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots contained within a time slot, the number of symbols and RBs contained in a time slot or mini-time slot, the number of subcarriers contained in an RB, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other structures can be varied in many ways.

[0333] In this disclosure, for example, in cases where articles are added through translation, such as in English (e.g., a, an, and the), this disclosure may also include cases where the noun following these articles is in a plural form.

[0334] In this disclosure, the phrase "A and B are different" can mean "A and B are not the same." Furthermore, this phrase can also mean "A and B are each different from C." Terms such as "separate" and "combined" can also be interpreted in the same way as "different."

[0335] The various forms / implementations described in this disclosure can be used individually, in combination, or switched during execution. Furthermore, the notification of predetermined information (e.g., a "Yes X" notification) is not limited to being explicit, but can also be implicit (e.g., not notifying the predetermined information).

[0336] The present disclosure has been described in detail above, but it will be clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented as modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the present disclosure is for illustrative purposes only and is not intended to be limiting.

[0337] Label Explanation

[0338] 10 base stations

[0339] 110 Dispatch Department

[0340] 120 Receiving Department

[0341] 130 Setting Department

[0342] 140 Control Department

[0343] 20 terminals

[0344] 210 Sending Department

[0345] 220 Receiving Department

[0346] 230 Setting Department

[0347] 240 Control Department

[0348] 1001 processor

[0349] 1002 Storage device

[0350] 1003 Auxiliary storage device

[0351] 1004 Communication device

[0352] 1005 Input Device

[0353] 1006 Output Device

[0354] Vehicle 2001

[0355] 2002 Drive Unit

[0356] 2003 Steering Unit

[0357] 2004 Accelerator Pedal

[0358] 2005 Brake Pedal

[0359] 2006 gearshift lever

[0360] 2007 front wheel

[0361] 2008 rear wheel

[0362] 2009 axle

[0363] 2010 Electronic Control Department

[0364] 2012 Information Service Department

[0365] 2013 Communication Module

[0366] 2021 Current Sensor

[0367] 2022 Speed ​​Sensor

[0368] 2023 Barometric Pressure Sensor

[0369] 2024 vehicle speed sensor

[0370] 2025 Accelerometer

[0371] 2026 Brake Pedal Sensor

[0372] 2027 Gearshift sensor

[0373] 2028 Object Detection Sensor

[0374] 2029 Accelerator Pedal Sensor

[0375] 2030 Driver Assistance Systems Department

[0376] 2031 microprocessor

[0377] 2032 Memory (ROM, RAM)

[0378] 2033 Communication Port (IO Port)

Claims

1. A terminal having: The receiving unit receives, from the base station, the first resource allocation related to the transmission of data for direct communication between the terminal; and The transmitting unit transmits the inter-terminal direct communication data to other terminals that receive data related to the reception of data for direct inter-terminal communication from the base station or other base stations, as per the second resource allocation. At least one of the first resource allocation and the second resource allocation is a resource allocation based on configuration authorization, i.e., CG.

2. The terminal according to claim 1, wherein, The transmitting unit transmits data for direct inter-terminal communication to the other terminals without the accompanying control channel.

3. The terminal according to claim 1, wherein, The transmitting unit selects one of the multiple destination IDs received from the base station and determines it as the sending counterpart.

4. The terminal according to claim 1, wherein, Resource allocation related to the transmission of data in direct communication between the terminals and resource allocation related to the reception of data in direct communication between the terminals are both based on CG resource allocation, and either the activation or deactivation of the CG is notified by receiving the same control signal.

5. The terminal according to claim 1, wherein, The resource allocation related to the transmission of data in direct communication between the terminals and the resource allocation related to the reception of data in direct communication between the terminals are respectively based on CG resource allocation and on dynamic licensing, i.e., DG resource allocation.

6. A communication method, wherein, The terminal executes the following procedure: The first resource allocation related to the transmission of data for direct communication between the base station and the terminal; and The data for direct inter-terminal communication is transmitted to other terminals that have received data related to the reception of data for direct inter-terminal communication from the base station or other base stations, in connection with the second resource allocation. At least one of the first resource allocation and the second resource allocation is a resource allocation based on configuration authorization, i.e., CG.

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