User device and communication method

Abstract

A user device is provided, the user device comprising: a receiving unit, which receives information specifying a resource group for sending a plurality of blocks, the plurality of blocks including a synchronization signal and broadcast information in a side link, and a corresponding beam in a set of a plurality of beams is applied to each of the plurality of blocks; a control unit, which selects a plurality of resources for sending the plurality of blocks based on the information specifying the resource group; and a sending unit, which uses the selected plurality of resources to send the plurality of blocks including the synchronization signal and broadcast information in the side link to other user devices.

Description

Technical Field

[0001] The present invention relates to a user device and a communication method in a wireless communication system. Background Art

[0002] In LTE (Long Term Evolution) and LTE's successor systems (e.g., also called LTE-A (LTE Advanced), NR (New Radio) (also called 5G)), D2D (Device to Device) technology is being studied, in which user devices communicate directly without going through a base station device (e.g., Non-Patent Document 1).

[0003] D2D reduces the traffic between user devices and base station devices, and enables communication between user devices even when the base station device cannot communicate during disasters. In addition, in 3GPP (3rd Generation Partnership Project), D2D is called "sidelink", but in this specification, a more general term, D2D, is used. However, in the description of the following embodiments, sidelink is also used as needed.

[0004] D2D communication is roughly divided into D2D discovery (also called D2D discovery) for discovering other user devices that can communicate, and D2D communication (also called D2D direct communication, D2D communication, direct communication between terminals, etc.) for direct communication between user devices. Hereinafter, when D2D communication (D2D communication), D2D discovery (D2D discovery), etc. are not specifically distinguished, they are referred to as D2D. In addition, signals sent and received via D2D are referred to as D2D signals. Various use cases for services related to V2X (Vehicle to Everything) in NR are being studied (for example, non-patent document 2).

[0005] Prior art literature

[0006] Non-patent literature

[0007] Non-patent document 1: 3GPP TS 36.211 V15.2.0 (2018-06)

[0008] Non-patent document 2: 3GPP TR 22.886 V15.1.0 (2017-03) Summary of the invention

[0009] Problems to be solved by the invention

[0010] When D2D communication is performed in a high frequency band, it is assumed that the synchronization signal and the broadcast information are transmitted using beamforming. When different beams are used in different resources, the overhead for notifying the resources for transmitting the synchronization signal and the broadcast information may increase.

[0011] In inter-terminal direct communication, it is necessary to reduce the overhead when notifying resources for transmitting synchronization signals and broadcast information.

[0012] Means for solving problems

[0013] According to one embodiment, a user device is provided, wherein the user device comprises:

[0014] A receiving unit, which receives information specifying a resource group for sending a plurality of blocks, wherein the plurality of blocks include synchronization signals and broadcast information in a side link, and a corresponding beam in a set of a plurality of beams is applied to each of the plurality of blocks; a control unit, which selects a plurality of resources for sending the plurality of blocks based on the information specifying the resource group; and a sending unit, which uses the selected plurality of resources to send the plurality of blocks including the synchronization signals and broadcast information in the side link to other user devices.

[0015] According to one method, a terminal is provided, wherein the terminal comprises: a receiving unit, which receives information related to resources for sending blocks including synchronization signals and broadcast information in terminal-to-terminal communication; and a control unit, which determines a time slot for sending the block based on the information related to the resources, the information related to the resources including the number of the blocks included in one cycle and a time slot offset from the start position of a wireless frame, and the control unit sets the number of the blocks included in the one cycle based on the information related to the resources.

[0016] According to one embodiment, a communication method performed by a terminal is provided, wherein the communication method includes the following steps: a step of receiving information related to resources for sending blocks containing synchronization signals and broadcast information in terminal-to-terminal communication; and a step of determining a time slot for sending the block based on the information related to the resources, the information related to the resources including the number of blocks included in one cycle and a time slot offset from the start position of a wireless frame, the communication method also including the step of setting the number of blocks included in the one cycle based on the information related to the resources.

[0017] According to one method, a communication system is provided, which includes a terminal and other terminals, wherein the terminal has: a receiving unit, which receives information related to resources used to send blocks containing synchronization signals and broadcast information in communication between the terminals; and a control unit, which determines the time slot for sending the block based on the information related to the resources, the information related to the resources including the number of the blocks included in one cycle and the time slot offset from the starting position of a wireless frame, the control unit sets the number of the blocks included in the one cycle based on the information related to the resources, and the other terminal has a receiving unit, which receives the blocks containing synchronization signals and broadcast information in communication between the terminals.

[0018] Effects of the Invention

[0019] According to this embodiment, in inter-UE direct communication, it is possible to reduce overhead when notifying resources for transmitting a synchronization signal and broadcast information. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a diagram for explaining V2X.

[0021] Figure 2 This is a diagram for explaining an example of configuring a synchronization signal and broadcast information of a side link.

[0022] Figure 3 It is a diagram showing an example of a wireless communication system in an embodiment.

[0023] Figure 4 It is a diagram showing an example of a wireless communication system in an embodiment.

[0024] Figure 5A A diagram showing an example of the structure of an SL-SSB resource in an implementation manner.

[0025] Figure 5B A diagram showing an example of the structure of an SL-SSB resource in an implementation manner.

[0026] Figure 5C A diagram showing an example of the structure of an SL-SSB resource in an implementation manner.

[0027] Fig. 6A A diagram showing an example of the structure of an SL-SSB resource in an implementation manner.

[0028] Figure 6B A diagram showing an example of the structure of an SL-SSB resource in an implementation manner.

[0029] Figure 7 A diagram showing an example of the structure of an SL-SSB resource in an implementation manner.

[0030] Figure 8 This is a diagram showing an example of configuring SL-SSB excluding the DL area in an implementation manner.

[0031] Fig. 9 A diagram showing an example of the structure of an SL-SSB resource in an implementation manner.

[0032] Fig.10 It is a diagram showing an example of the functional configuration of the base station apparatus 10 in the embodiment of the present invention.

[0033] Fig.11 1 is a diagram showing an example of a functional configuration of the user device 20 according to the embodiment of the present invention.

[0034] Fig.12 This is a diagram showing an example of the hardware configuration of the base station apparatus 10 or the user apparatus 20 according to the embodiment of the present invention. DETAILED DESCRIPTION

[0035] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0036] When the wireless communication system of the embodiment of the present invention is operated, the existing technology can be appropriately used. However, the existing technology is, for example, the existing LTE, but is not limited to the existing LTE. In addition, unless otherwise specified, the term "LTE" used in this specification has a broad meaning including LTE-Advanced and methods after LTE-Advanced (for example: NR) or wireless LAN (Local Area Network: local area network).

[0037] Furthermore, in the embodiments of the present invention, the duplexing method may be a TDD (Time Division Duplex) method, an FDD (Frequency Division Duplex) method, or other methods (for example, Flexible Duplex, etc.).

[0038] In addition, in the following description, the method of sending a signal using a transmit beam may also be digital beamforming of a signal obtained by sending a signal multiplied by a precoding vector (precoding performed using a precoding vector), or may be analog beamforming of beamforming implemented using a variable phase shifter in an RF (Radio Frequency) circuit. Similarly, the method of receiving a signal using a receive beam may also be digital beamforming of multiplying a received signal by a predetermined weight vector, or may be analog beamforming of beamforming implemented using a variable phase shifter in an RF circuit. Hybrid beamforming obtained by combining digital beamforming and analog beamforming may also be applied to transmission and reception. In addition, sending a signal using a transmit beam may also be sending a signal through a specific antenna port. Similarly, receiving a signal using a receive beam may also be receiving a signal through a specific antenna port. An antenna port refers to a logical antenna port or a physical antenna port defined in accordance with the 3GPP standard. In addition, the above-mentioned precoding or beamforming may also be referred to as a precoder or a spatial domain filter, etc.

[0039] In addition, the method of forming the transmission beam and the reception beam is not limited to the above method. For example, in the base station device 10 or the user device 20 included in the wireless communication system of the embodiment of the present invention having multiple antennas, a method of changing the angle of each antenna can be used, or a method of combining the method of using a precoding vector with the method of changing the antenna angle can be used, or different antenna panels can be switched for use, or a method of combining the method of using multiple antenna panels can be used, or other methods can be used. In addition, for example, multiple different transmission beams can be used in a high frequency band. The case of using multiple transmission beams is called multi-beam operation, and the case of using one transmission beam is called single-beam operation.

[0040] In the embodiment of the present invention, “configuring” wireless parameters and the like may be pre-configuring predetermined values, or may be configuring wireless parameters notified from the base station apparatus 10 or the user apparatus 20 .

[0041] Figure 1 This is a diagram for explaining V2X. In 3GPP, the technology to realize V2X (Vehicle to Everything) or eV2X (enhanced V2X) by extending D2D functions is being studied and standardized. Figure 1As shown, V2X is a part of ITS (Intelligent Transport Systems), which is a general term for V2V (Vehicle to Vehcle) which is a form of communication between vehicles, V2I (Vehicle to Infrastructure) which is a form of communication between vehicles and roadside units (RSU: Road-Side Unit) installed next to the road, V2N (Vehicle to Nomadic device) which is a form of communication between vehicles and mobile terminals held by drivers, and V2P (Vehicle to Pedestrian) which is a form of communication between vehicles and mobile terminals held by pedestrians.

[0042] In addition, 3GPP is studying V2X using cellular communications and terminal-to-terminal communications using LTE or NR. Regarding LTE or NR V2X, it is assumed that research not limited to 3GPP specifications can be promoted in the future. For example, it is assumed that research is conducted to ensure interoperability, reduce costs caused by high-level installation, use or switch methods of multiple RATs (Radio Access Technology), respond to regulations in various countries, and obtain, publish, manage and use data of LTE or NR V2X platforms.

[0043] In the embodiments of the present invention, it is mainly assumed that the communication device is mounted on a vehicle, but the embodiments of the present invention are not limited to this method. For example, the communication device can be a terminal held by a person, the communication device can also be a device mounted on a drone or an aircraft, the communication device can also be a base station, RSU, relay station (Relay node), user device with scheduling capability, etc.

[0044] In addition, SL (Sidelink) can also be distinguished by UL (Uplink) or DL ​​(Downlink) and any one or a combination of the following 1) to 4). In addition, SL can also be other names.

[0045] 1) Resource allocation in the time domain

[0046] 2) Resource allocation in the frequency domain

[0047] 3) Reference synchronization signal (including SLSS (Sidelink Synchronization Signal))

[0048] 4) Reference signal used in path loss measurement for transmit power control

[0049] In addition, for OFDM (Orthogonal Frequency Division Multiplexing) of SL or UL, any one of CP-OFDM (Cyclic-Prefix OFDM), DFT-S-OFDM (Discrete Fourier Transform-Spread-OFDM), OFDM without transform precoding, or OFDM with transform precoding can also be used.

[0050] In the SL of LTE, Mode 3 and Mode 4 are defined for resource allocation of the SL to the user device 20. In Mode 3, transmission resources are dynamically allocated using DCI (Downlink Control Information) sent from the base station device 10 to the user device 20. In Mode 3, SPS (Semi Persistent Scheduling) can also be performed. In Mode 4, the user device 20 autonomously selects transmission resources from a resource pool.

[0051] In addition, the time slot in the embodiment of the present invention may also be replaced by a mini time slot, a subframe, a radio frame, or a TTI (Transmission Time Interval). In addition, the cell in the embodiment of the present invention may also be replaced by a cell group, a carrier component, a BWP, a resource pool, a resource, a RAT (Radio Access Technology), a system (including a wireless LAN), etc.

[0052] Figure 2This is a diagram for explaining an example of configuring the synchronization signal and broadcast information of the sidelink. In LTE V2X, the SLSS (Sidelink synchronization signal) as a synchronization signal and the PSBCH (Physical Sidelink Broadcast Channel) as a channel for transmitting broadcast information are transmitted by the user device 20, and other user devices 20 can use the SLSS transmitted from the user device 20 for synchronization. For example, a user device 20 located outside the coverage of the base station device 10 cannot directly use the synchronization signal from the base station device 10 for synchronization, so sometimes the synchronization signal transmitted from the user device 20 is used for synchronization.

[0053] like Figure 2 As shown in FIG. 1 , the transmission opportunities of SLSS and PSBCH in LTE V2X (SLSS / PSBCH occasion) occupy the entire subframe. The transmission opportunities of PSCCH (Physical Sidelink Control Channel) or PSSCH (Physical Sidelink Shared Channel) and SLSS and PSBCH are not multiplexed in the time domain.

[0054] In NR V2X, the case where the signals related to the synchronization processing of the side link include SLSS and PSBCH is being studied. In addition, the synchronization source may also be, for example, GNSS (Global Navigation Satellite System), gNB (Next generation Node-B), eNB (enhanced Node-B), NR-UE (User Equipment) or LTE-UE.

[0055] Here, in NR V2X, in addition to the case where the frequency band used in DL or UL between the normal base station apparatus 10 and the user apparatus 20 is independent of the frequency band used in SL of V2X, a case of using a common frequency band in DL, UL, and SL is being studied. In the case of using a common frequency band in DL, UL, and SL, it is envisioned to limit the amount of resources that can be used in SL or the location of resources that can be configured.

[0056] In addition, in NR V2X, SL communication is envisioned through FR2 (Frequency Range 2). It is envisioned that in a high frequency band such as FR2, SLSS and PSBCH are transmitted using beamforming. When different beams are used in different resources, the amount of resources required for the transmission of SLSS and PSBCH may increase. Alternatively, repeated transmissions aimed at combined reception of SLSS and PSBCH may be performed, and the amount of resources required for the transmission of SLSS and PSBCH may increase. Signals including signals equivalent to SLSS (Sidelink synchronization signal) and PSBCH (Physical Sidelink Broadcast Channel) may also be referred to as SL SS blocks, SL SS / PSBCH blocks, etc. Hereinafter, the signal including SLSS and PSBCH will be referred to as "SL-SSB". In SL-SSB, DM-RS for demodulation of PSBCH, etc. may also be included. In addition, hereinafter, a signal including a DL SS and a PBCH (Physical Broadcast Channel) is referred to as a "DL-SSB".

[0057] Figure 3 is a diagram showing an example of a wireless communication system in an embodiment of the present invention. As described above, in NR V2X, the amount of resources required for the transmission of SL-SSB may increase. Therefore, for example, the user device 20 may also use the resources of the channel already configured in DL or UL to transmit the SL-SSB. By using the resources of the channel already configured in DL or UL, the user device 20 can transmit the SL-SSB without newly securing resources dedicated to the SL-SSB.

[0058] like Figure 3 As shown, the user device 20A located within the coverage of the base station device 10A receives the DL-SSB from the base station device 10A. The user device 20A sends the SL-SSB with the base station device 10A as the synchronization source to the user device 20B located outside the coverage. In addition, the user device 20B can also send the SL-SSB with the user device 20A as the synchronization source.

[0059] In addition, if Figure 4As shown, when the user device 20A and the user device 20B are outside the coverage of the base station 10A, the user device 20A and the user device 20B cannot receive the broadcast information from the base station 10A. In this case, the user device 20A can also use the SL-SSB resource information preconfigured in the terminal or SIM (Subscriber Identity Module) to send SL-SSB to the user device 20B. As a result, synchronization can be established between the user device 20A and the user device 20B, and side link communication can be performed between the user device 20A and the user device 20B.

[0060] The following describes an example of a method for notifying the user device 20 of information specifying the SL-SSB resource for transmitting the SL-SSB. Figure 3 As shown in FIG. 1 , information specifying SL-SSB resources may also be notified from the base station apparatus 10A to the user apparatus 20A. Figure 4 As shown, the user device 20A may also notify the user device 20B. Additionally or alternatively, the information specifying the SL-SSB resource may be written in advance to the user device 20 or to a SIM card applied to the user device 20. The information specifying the SL-SSB resource may also be information notified to the user device 20 in the past and maintained by the user device 20. The information specifying the SL-SSB resource may also be notified or specified using any one of the signals of RRC, MAC, and DCI / SCI. When notifying or specifying information of designated SL-SSB resources, any one of PBCH (Physical Broadcast Channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PSBCH (Physical Sidelink Broadcast Channel), PSDCH (Physical Sidelink Discovery Channel), PSSCH (Physical Sidelink Shared Channel) and PSCCH (Physical Sidelink Control Channel) may be used.

[0061] (Example 1)

[0062] The following describes Example 1 of a method for notifying information of a SL-SSB resource designated for transmitting a SL-SSB. Example 1 is as follows: Figure 5A , Figure 5B and Figure 5C An example of information notifying specifying various SL-SSB resources is shown. Figure 5A An example is shown in which SL-SSB is transmitted using 4 different beams and the transmission of SL-SSB using 4 different beams is performed periodically. Figure 5B An example is shown in which SL-SSB is transmitted periodically and one SL-SSB is transmitted in each period. Figure 5B In , SL-SSB can also be sent using different beams in each period. Figure 5C An example is shown in which SL-SSB is transmitted periodically and two SL-SSBs are transmitted in each period. Figure 5C In order to send two SL-SSBs in each cycle, two different beams can also be applied.

[0063] exist Figure 5A , Figure 5B and Figure 5C In order to send 4 SL-SSBs, 4 different beams are used. However, the number of different beams is not limited to 4, and more than 5 beams may be used to send more than 5 SL-SSBs, or less than 4 SL-SSBs may be used to send less than 4 SL-SSBs. In particular, when using radio waves with a narrow coverage range such as millimeter waves, the coverage range can be expanded by applying multiple beams.

[0064] like Figure 5A , Figure 5B and Figure 5C As shown in the example, a set of multiple SL-SSB resources used to send multiple SL-SSBs (i.e., multiple SL-SSBs using a set of different multiple beams) may be defined as an SL-SSB resource group. Alternatively, a set of multiple SL-SSB resources used to send multiple repeated SL-SSBs containing the same information based on the same beam for coverage expansion may be defined as an SL-SSB resource group. In Example 1 of the method for notifying information specifying SL-SSB resources for sending SL-SSBs, any one of the following items 1 to 8 or multiple items of the following items 1 to 8 are notified (or specified) to the user device 20.

[0065] (Item 1)

[0066] The starting position of the SL-SSB resource group. For example, the system frame number (System Frame Number) and the slot offset, symbol offset, or both the slot offset and symbol offset from the starting position of the radio frame specified by the system frame number may be notified.

[0067] (Item 2)

[0068] The number of SL-SSB resources configured continuously in the SL-SSB resource group. Here, the number of SL-SSB resources configured continuously may also be specified as the number of SL-SSB resources configured continuously in the time direction only. Alternatively, the number of SL-SSB resources configured continuously may also be specified as the number of SL-SSB resources configured continuously in the frequency direction. Alternatively, the number of SL-SSB resources configured continuously may also be specified as both the number of SL-SSB resources configured continuously in the time direction and the number of SL-SSB resources configured continuously in the frequency direction. Alternatively or additionally, the number of SL-SSB resources configured continuously may also be specified as the total number of SL-SSB resources configured continuously in the time direction and the number of SL-SSB resources configured continuously in the frequency direction.

[0069] (Item 3)

[0070] The number of SL-SSBs contained in the SL-SSB resource group. Figure 5A , Figure 5B and Figure 5C In the example, the number of SL-SSBs included in the SL-SSB resource group can also be specified as 4.

[0071] (Item 4)

[0072] The period of the SL-SSB resource group. For example, the period may be specified as an absolute time, or as the number of time slots or the number of symbols.

[0073] (Item 5)

[0074] like Figure 5B As shown in FIG. 1 , the period of the SL-SSB resource group when the SL-SSB is sent one by one. Figure 5C As shown, multiple SL-SSB resources are configured consecutively, but Figure 5ADifferent from the case where the number of SL-SSB resources configured continuously is less than the number of SL-SSBs included in the SL-SSB resource group, the period of the SL-SSB resource group. For example, as a period, it can be specified as an absolute time, or it can be specified as the number of time slots or the number of codewords. Here, in the case where another SL-SSB resource group is configured after an SL-SSB resource group, the period of an SL-SSB resource group configured earlier in time and the period of an SL-SSB resource group configured later in time may also be different.

[0075] (Item 6)

[0076] The starting position of the SL-SSB resource group in the frequency direction. Here, in LTE V2X, SLSS and PSBCH occupy the entire subframe and are multiplexed, but in NR, it is assumed that the frequency band occupied by SLSS and PSBCH changes. Therefore, it is assumed that the starting position of the SL-SSB resource group in the frequency direction needs to be specified. It can be specified as a position in the frequency direction within the bandwidth part (Bandwidth Part), as a position in the frequency direction within the carrier, or as a position in the frequency direction based on other reference points.

[0077] (Item 7)

[0078] When multiple SL-SSB resources are configured in the frequency direction, the interval between adjacent SL-SSB resources. Fig. 6A and Figure 6B As shown, it is assumed that multiple SL-SSB resources are configured continuously in the frequency direction. In this case, it can also be specified that multiple SL-SSB resources are configured continuously in the frequency direction.

[0079] (Item 8)

[0080] The information of the bandwidth part (Bandwidth Part) of the SL-SSB resource group is configured. It can also be specified as a bandwidth part ID (Bandwidth Part ID), or it can be specified by the position or range in the frequency direction of the bandwidth part (Bandwidth Part).

[0081] Multiple SL-SSBs sent through different SL-SSB resources in the SL-SSB resource group can notify the same information, or can also notify different information. In addition, multiple SL-SSBs sent through different SL-SSB resources in the SL-SSB resource group can be sent through the same beam, or can also be sent through different beams.

[0082] The information transmitted by the multiple SL-SSBs transmitted through different SL-SSB resources in the SL-SSB resource group may be the same in each cycle, or may be different in each cycle. In addition, the order of the beams applied in the multiple SL-SSBs transmitted through different SL-SSB resources in the SL-SSB resource group may be the same in each cycle, for example, Figure 7 As shown, it is different for each period. In this case, the order of beams can also be switched cyclically by applying cyclic shift. For example, when the sidelink communication of LTE coexists with the sidelink communication of NR, the traffic volume of LTE is periodic traffic volume, so the communication of the sidelink of LTE and the transmission of the above-mentioned multiple SL-SSBs may conflict at the same time and frequency position. In such a case, by periodically applying different information and beams, the impact of the conflict can be reduced.

[0083] In addition, when the notification (or specification) of any one of the above items 1 to 8 or multiple of the above items 1 to 8 is considered as one set of configurations of SL-SSB resource groups, the configurations of multiple sets of SL-SSB resource groups may be notified (or specified). For example, the user device 20 is notified (or specified) of the configurations of three sets of SL-SSB resource groups, and the user device 20 may also send SL-SSB in any one or more sets of SL-SSB resource groups.

[0084] (Example 2)

[0085] Below, refer to Figure 8 , Example 2 of a method for notifying information specifying SL-SSB resources for sending SL-SSBs. In Example 2, as in Example 1, any one of the above-mentioned items 1 to 8 or a plurality of the above-mentioned items 1 to 8 are notified (or specified) to the user device 20. The user device 20 excludes a portion of the SL-SSB resources according to the notified TDD configuration or the position of the DL-SSB. This example of exclusion is Figure 8 As shown in. For example, the resources for SL transmission overlapping with the area other than UL may be excluded, the resources for SL transmission overlapping with the codewords of the transmitted SSB may be excluded, or the resources for SL transmission overlapping with the area other than the codewords of the transmitted SSB may be excluded.

[0086] In Example 2, the user device 20 configures the SL-SSB resource that should be configured in the SL-SSB resource position that is excluded as described above, at the next configurable time and frequency position. Figure 8 It should be configured in Figure 8The SL-SSB resource of the DL resource position shown is configured at a time and frequency position that is temporally behind the DL resource position.

[0087] As a variation of Example 2, after the SL-SSB resource position is determined regardless of the exclusion of the above-mentioned SL-SSB resources, the SL-SSB resources of the excluded part may be set to "none".

[0088] In this way, by excluding a part of the SL-SSB resources according to the notified TDD configuration or the position of the DL-SSB, the possibility of interference with the transmission of the SL-SSB can be reduced, or the possibility of interference caused by the transmission of the SL-SSB can be reduced. In addition, by performing a notification of any one of Items 1 to Item 8 of Example 1, the overhead of notifying the information of the specified SL-SSB resources can be reduced. Assuming that it is desired to reduce the possibility of interference with the transmission of the SL-SSB without excluding the SL-SSB as in Example 2, in order to specify multiple SL-SSB resources, it is necessary to notify multiple offset information, and the number of bits when notifying the information of the specified SL-SSB resources may increase.

[0089] In addition, in the case of LTE, regarding the position of the SL-SSB, position configuration data other than the SL-SSB in the frequency direction is specified. Fig. 9 As shown, in the case of NR, PSCCH, PSSCH or other channels can be configured, or it can be unused resources as in the case of LTE.

[0090] In addition, in an embodiment of the present invention, SL-SSB may be a signal structure identical to DL-SSB, or a signal structure newly defined as SL. The signal structure identical to DL-SSB may also refer to a signal structure identical to the DL-SSB corresponding to the SSB index received and used in synchronization.

[0091] In addition, in an embodiment of the present invention, the signaling for notification or designation may all be any one of RRC, MAC, DCI (Downlink Control Information) or SCI (Sidelink Control Information). In addition, the signaling may be sent via any one of PBCH, PDCCH, PDSCH, PSBCH, PSDCH, PSSCH, and PSCCH. That is, the user device 20 may receive signaling from the base station device 10, and the user device 20 may also receive signaling from other user devices 20. In addition, the signaling may also be pre-configured. For example, the signaling may also be signaling based on information written in advance to a SIM card or a terminal, or may be signaling based on information that retains past notifications.

[0092] According to the above-described embodiment, even when resources available in the side link are shared with the downlink or uplink, the user apparatus 20 can use appropriate resources to transmit a signal used for synchronization of the side link. In addition, the user apparatus 20 can effectively and flexibly utilize resources by transmitting SL-SSB using resources of DL-SSB that do not reach the periphery of the user apparatus 20.

[0093] That is, in inter-UE direct communication, the user equipment can transmit the synchronization signal and the broadcast information using shared resources.

[0094] (Device Structure)

[0095] Next, the functional configuration examples of the base station apparatus 10 and the user apparatus 20 that perform the above-described processing and operations are described. The base station apparatus 10 and the user apparatus 20 include functions for implementing the above-described embodiments. However, the base station apparatus 10 and the user apparatus 20 may each include only a part of the functions in the embodiments.

[0096] <Base Station Device 10>

[0097] Fig.10 1 is a diagram showing an example of the functional configuration of the base station apparatus 10. Fig.10 As shown, the base station apparatus 10 includes a transmission unit 110 , a reception unit 120 , a setting unit 130 , and a control unit 140 . Fig.10 The functional configuration shown is only an example, and any functional division and function unit name may be used as long as the operation of the embodiment of the present invention can be performed.

[0098] The transmission unit 110 includes a function of generating a signal to be transmitted to the user apparatus 20 side and wirelessly transmitting the signal. The reception unit 120 includes a function of receiving various signals transmitted from the user apparatus 20 and acquiring, for example, higher layer information from the received signal. In addition, the transmission unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DL reference signals, etc. to the user apparatus 20.

[0099] The setting unit 130 stores in a storage device the preset setting information and various setting information to be transmitted to the user device 20, and reads out from the storage device as needed. The content of the setting information is, for example, information related to resource settings for D2D communication.

[0100] As described in the embodiment, the control unit 140 performs processing related to the setting for the user device 20 to perform D2D communication. In addition, the control unit 140 performs processing related to the resource determination used in the transmission of the synchronization signal and broadcast information of the D2D communication. In addition, the control unit 140 transmits the scheduling of the D2D communication to the user device 20 via the transmission unit 110. The functional unit related to signal transmission in the control unit 140 may be included in the transmission unit 110, and the functional unit related to signal reception in the control unit 140 may be included in the reception unit 120.

[0101] <User Device 20>

[0102] Fig.11 FIG. 2 is a diagram showing an example of a functional configuration of the user device 20. Fig.11 As shown, the user device 20 includes a transmitting unit 210 , a receiving unit 220 , a setting unit 230 , and a control unit 240 . Fig.11 The functional configuration shown is only an example, and any functional division and function unit name may be used as long as the operation of the embodiment of the present invention can be performed.

[0103] The transmitting unit 210 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The receiving unit 220 receives various signals wirelessly and obtains a higher layer signal from the received physical layer signal. In addition, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals or reference signals, etc. transmitted from the base station device 10. In addition, 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 user devices 20, and the receiving unit 220 receives PSCCH, PSSCH, PSDCH or PSBCH, etc. from other user devices 20.

[0104] The setting unit 230 stores various setting information received by the receiving unit 220 from the base station device 10 or the user device 20 in the storage device, and reads it from the storage device as needed. In addition, the setting unit 230 also stores pre-set setting information. The content of the setting information is, for example, information related to resource settings for D2D communication.

[0105] As described in the embodiment, the control unit 240 controls D2D communication with other user devices 20. In addition, the control unit 240 performs processing related to resource determination used in the transmission of synchronization signals and broadcast information of D2D communication. In addition, the control unit 240 may also perform scheduling of D2D communication. The functional unit related to signal transmission in the control unit 240 may be included in the transmission unit 210, and the functional unit related to signal reception in the control unit 240 may be included in the reception unit 220.

[0106] (Hardware Structure)

[0107] The block diagram used in the description of the above embodiment ( Fig.10 and Fig.11) shows blocks (blocks) in units of functions. These functional blocks (structural parts) are implemented by any combination of at least one of hardware and software. In addition, the implementation method of each functional block is not particularly limited. That is, each functional block can be implemented using a device that is physically or logically combined, or it can be implemented by connecting two or more physically or logically separated devices directly or indirectly (for example, using wires, wirelessly, etc.) and using these multiple devices. The functional block can also be implemented by combining software in the above-mentioned one device or the above-mentioned multiple devices.

[0108] Functions include judging, determining, judging, calculating, calculating, processing, deriving, investigating, searching, confirming, receiving, sending, outputting, accessing, solving, selecting, selecting, establishing, comparing, assuming, expecting, regarding, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but are not limited to these. For example, a functional block (structural part) that enables the sending function is called a transmitting unit or a transmitter. As described above, in any case, the implementation method is not particularly limited.

[0109] For example, the base station device 10, the user device 20, etc. in one embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. Fig.10 1 is a diagram showing an example of a hardware configuration of a base station device 10 and a user device 20 according to an embodiment of the present disclosure. The base station device 10 and the user device 20 may 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, a bus 1007, and the like.

[0110] In the following description, the word "device" may be replaced by "circuit", "equipment (device)", "unit (unit)", etc. The hardware configuration of the base station device 10 and the user device 20 may be configured to include one or more of the devices shown in the figure, or may be configured to exclude some of the devices.

[0111] Each function in the base station device 10 and the user device 20 is implemented by the following method: predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, so that the processor 1001 performs calculations and controls the communication of the communication device 1004 or controls at least one of the reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

[0112] The processor 1001 controls the entire computer by, for example, running an operating system. The processor 1001 may also be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, a computing device, registers, etc. For example, the control unit 140, the control unit 240, etc. described above may also be implemented by the processor 1001.

[0113] In addition, the processor 1001 reads a program (program code), a software module, or data from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and performs various processes based on the program. As the program, a program that causes the computer to execute at least a part of the actions described in the above embodiments is used. For example, it can also be implemented by a control program stored in the storage device 1002 and operated by the processor 1001. Figure 8 The control unit 140 of the base station device 10 shown in FIG. 10 may be implemented by, for example, a control program stored in the storage device 1002 and executed by the processor 1001. Fig. 9 The control unit 240 of the user device 20 shown in FIG. Although it is described that the various processes described above are performed by one processor 1001, the various processes described above may be performed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. In addition, the program may be transmitted from the network via a telecommunication line.

[0114] The storage device 1002 is a computer-readable recording medium, and may be composed of at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), etc. The storage device 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The storage device 1002 can store a program (program code), a software module, etc. that can be executed to implement the communication method of one embodiment of the present disclosure.

[0115] The auxiliary storage device 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (CompactDisc ROM), a hard disk drive, a floppy disk, a magneto-optical disk (e.g., a compressed disk, a digital versatile disk, a Blu-ray (registered trademark) disk, a smart card, a flash memory (e.g., a card, a stick, a key drive), a Floppy (registered trademark) disk, a magnetic strip, etc. The auxiliary storage device 1003 may also be referred to as an auxiliary storage device. The above-mentioned storage medium may be, for example, other appropriate media such as a database, a server, etc. that includes at least one of the storage device 1002 and the auxiliary storage device 1003.

[0116] The communication device 1004 is hardware (transceiver device) for communicating between computers via at least one of a wired network and a wireless network, and may be referred to as a network device, a network controller, a network card, a communication module, etc. For example, in order to implement at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex), the communication device 1004 may also be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc. For example, a transceiver antenna, an amplifier, a transceiver, a transmission path interface, etc. may also be implemented by the communication device 1004. The transceiver may also be physically or logically installed separately from the transmitter and the receiver.

[0117] The input device 1005 is an input device that receives input from the outside (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.). The output device 1006 is an output device that implements output to the outside (e.g., a display, a speaker, an LED light, etc.). In addition, the input device 1005 and the output device 1006 may also be integrally formed (e.g., a touch panel).

[0118] In addition, the processor 1001 and the storage device 1002 and other devices are connected via a bus 1007 for communicating information. The bus 1007 may be configured using a single bus or may be configured using different buses between the devices.

[0119] In addition, the base station device 10 and the user device 20 may 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 an FPGA (Field Programmable Gate Array), and a part or all of each functional block may be implemented by the hardware. For example, the processor 1001 may be implemented using at least one of these hardware.

[0120] (Summary of Implementation Methods)

[0121] As described above, according to an embodiment of the present invention, a user device is provided, wherein the user device comprises: a receiving unit, which receives information of a resource group specifying the transmission of multiple blocks, the multiple blocks including synchronization signals and broadcast information in a side link, and a corresponding beam in a set of multiple beams is applied to each of the multiple blocks; a control unit, which selects multiple resources for transmitting the multiple blocks according to the information specifying the resource group; and a transmitting unit, which uses the selected multiple resources to transmit multiple blocks including the synchronization signal and broadcast information in the side link to other user devices.

[0122] According to the above configuration, it is possible to reduce the control signal overhead when specifying a plurality of resources for transmitting a plurality of blocks including a synchronization signal and broadcast information in a side link and a set of a plurality of different beams to which are applied.

[0123] Alternatively, the information specifying the resource group is at least one of: a starting position of the resource group, the number of the plurality of blocks, the number of consecutively arranged blocks among the plurality of blocks, a period of the resource group, and a starting position of the resource group in the frequency direction. According to the above structure, it is possible to reduce the control signal overhead when specifying a plurality of resources for transmitting a plurality of blocks, the plurality of blocks including a synchronization signal and broadcast information in a side link and a set of a plurality of different beams to which are applied.

[0124] Alternatively, the receiving unit receives a time-division multiplexing frame structure or a time-frequency position of a block including a synchronization signal and broadcast information in a downlink, and the control unit excludes a portion of a plurality of resources included in a wireless frame according to the time-division multiplexing frame structure or the time-frequency position of the block including a synchronization signal and broadcast information in a downlink, and selects a plurality of resources for transmitting the plurality of blocks according to information specifying the resource group. According to this structure, interference when transmitting a plurality of blocks including a synchronization signal and broadcast information in a side link can be reduced.

[0125] Alternatively, the control unit may allocate the resources to be allocated at the position of the part of resources in a resource position that is later in time than the position of the part of resources, without excluding the part of resources included in the resource group. According to this configuration, interference when a plurality of blocks including synchronization signals and broadcast information in a side link are transmitted can be reduced.

[0126] In addition, according to an embodiment of the present invention, a communication method for a user device is provided, wherein the communication method has the following steps: receiving information specifying a resource group for sending a plurality of blocks, the plurality of blocks including a synchronization signal and broadcast information in a side link and a set of a plurality of different beams applied; selecting a plurality of resources for sending the plurality of blocks according to the information specifying the resource group; and using the selected plurality of resources to send a plurality of blocks including a synchronization signal and broadcast information in the side link to other user devices. According to the above communication method, the overhead of control signals when specifying a plurality of resources for sending a plurality of blocks including a synchronization signal and broadcast information in a side link and a set of a plurality of different beams applied can be reduced.

[0127] (Supplementary Implementation Methods)

[0128] The above describes the various embodiments of the present invention, but the disclosed invention is not limited to such embodiments, and a person skilled in the art should understand various variations, modifications, substitutions, replacements, etc. In order to facilitate the understanding of the invention, specific numerical examples are used for description, but unless otherwise specified, these numerical values ​​are only examples, and any appropriate value can be used. The distinction between the items in the above description is not essential to the present invention, and the matters recorded in more than two items can be used in combination as needed, and the matters recorded in a certain item can be applied to the matters recorded in other items (as long as there is no contradiction). The boundaries of the functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries of the physical components. The actions of multiple functional units can be physically performed by one component, or the actions of one functional unit can be physically performed by multiple components. Regarding the processing procedures described in the embodiments, the order of processing can be swapped if there is no contradiction. In order to facilitate the description of the processing, the base station device 10 and the user device 20 are described using functional block diagrams, but such devices can also be implemented by hardware, software, or a combination thereof. The software that operates by the processor of the base station device 10 according to the embodiment of the present invention and the software that operates by the processor of the user device 20 according to the embodiment of the present invention can also be stored in a random access memory (RAM), a flash memory, a read-only memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, a server and any other appropriate storage medium.

[0129] In addition, the notification of information is not limited to the form / implementation method described in the present disclosure, and other methods may also be used. For example, the notification of information may be implemented through physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), high-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 a combination thereof. In addition, 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.

[0130] Each form / implementation described in the present disclosure may also be applied to at least one of LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), NR (new radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), a system using other appropriate systems, and a next-generation system extended therefrom. In addition, a combination of a plurality of systems (for example, a combination of at least one of LTE and LTE-A with 5G, etc.) may be applied.

[0131] The processing procedures, timings, and flows of each form / implementation described in this specification may be changed in order if there is no contradiction. For example, for the method described in this disclosure, the elements of various steps are presented in an illustrative order, but are not limited to the specific order presented.

[0132] In this specification, a specific action that is assumed to be performed by the base station device 10 may also be performed by its upper node depending on the situation. It is obvious that in a network composed of one or more network nodes having the base station device 10, various actions performed for communication with the user device 20 can be performed by at least one of the base station device 10 and other network nodes other than the base station device 10 (for example, consider MME or S-GW, etc., but not limited to this). In the above, the case where there is only one other network node other than the base station device 10 is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0133] The information or signals described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), and can also be input or output via a plurality of network nodes.

[0134] The input or output information can be stored in a specific location (e.g., memory) or managed using a management table. The input or output information can be rewritten, updated, or appended. The output information can also be deleted. The input information can also be sent to other devices.

[0135] The determination in the present disclosure can be made by a value represented by 1 bit (0 or 1), by a Boolean value (Boolean: true or false), or by comparison of numerical values ​​(for example, comparison with a predetermined value).

[0136] Whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, software shall be interpreted broadly to mean commands, sets of commands, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0137] In addition, software, commands, information, etc. may be sent and received via a transmission medium. For example, when software is sent from a web page, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these wired technology and wireless technology is included in the definition of transmission medium.

[0138] Any of a variety of different technologies may be used to represent the information, signals, etc. described in the present disclosure. For example, data, commands, commands, information, signals, bits, symbols, chips, etc. that may be involved in the above description as a whole may be represented by voltage, current, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any combination of these.

[0139] In addition, the terms described in the present disclosure and the terms required for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may also be a signal (signaling). In addition, a signal may also be a message. In addition, a component carrier (CC) may also be referred to as a carrier frequency, a cell, a frequency carrier, etc.

[0140] The terms "system" and "network" used in this disclosure are used interchangeably.

[0141] In addition, the information, parameters, etc. described in the present disclosure may be represented by absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0142] The names used in the above parameters are not limiting names in any respect. Also, the formulas, etc., using these parameters may sometimes differ from the formulas explicitly disclosed in this disclosure. The various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable names, and therefore, the various names assigned to these various channels and information elements are not limiting names in any respect.

[0143] In the present disclosure, terms such as "base station (BS)", "wireless base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission / reception point", "cell", "sector", "cell group", "carrier", and "component carrier" can be used interchangeably. Base stations are sometimes referred to as macro cells, small cells, micro cells, and pico cells.

[0144] A base station can accommodate one or more (for example, three) cells. When a base station accommodates multiple cells, the overall coverage area of ​​the base station can be divided into multiple smaller areas, and each smaller area can also provide communication services through a base station subsystem (for example, a small base station for indoor use RRH: Remote Radio Head). Terms such as "cell" or "sector" refer to a part or the entirety of the coverage area of ​​at least one of the base station and the base station subsystem that provide communication services within the coverage area.

[0145] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0146] Regarding mobile stations, those skilled in the art sometimes also refer to them as subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, handsets, user agents, mobile clients, clients or some other appropriate terms.

[0147] At least one of the base station and the mobile station may also be referred to as a transmitting device, a receiving device, a communication device, etc. In addition, at least one of the base station and the mobile station may also be a device mounted on a mobile body, the mobile body itself, etc. The mobile body may be a means of transportation (e.g., a car, an airplane, etc.), a mobile body that moves unmanned (e.g., a drone, an autonomous vehicle, etc.), or a robot (manned or unmanned). In addition, at least one of the base station and the mobile station also includes a device that does not necessarily move when performing a communication operation. For example, at least one of the base station and the mobile station may also be an IoT (Internet of Things) device such as a sensor.

[0148] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, regarding a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals 20 (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything: Vehicle to Everything System), etc.), the various methods / implementations of the present disclosure may also be applied. In this case, a structure in which the user device 20 has the functions possessed by the above-mentioned base station device 10 may also be formed. In addition, terms such as "uplink" and "downlink" may also be replaced by terms corresponding to inter-terminal communication (for example, "side"). For example, an uplink channel, a downlink channel, etc. may also be replaced by a side channel.

[0149] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station may have the functions of the user terminal described above.

[0150] The terms "determining" and "determining" used in this disclosure sometimes include a variety of actions. "Determining" and "determining" may include, for example, situations where matters that have been judged, calculated, calculated, processed, derived, investigated, searched (for example, searched in a table, database or other data structure), confirmed (ascertaining) are considered to have been "determined" or "determined". In addition, "determining" and "determining" may include situations where matters that have been received (for example, receiving information), transmitted (for example, transmitting information), input, output, accessed (for example, accessed data in a memory) are considered to have been "determined" or "determined". In addition, "determining" and "determining" may include situations where matters that have been resolved (resolving), selected (selecting), chosen (choosing), established (establishing), compared (comparing), etc. are considered to have been "determined" or "determined". That is, "judgment" and "decision" can include "judgment" and "decision" of any action. In addition, "judgment (decision)" can be replaced with "assuming (assuming)", "expecting (expecting)", "considering (considering)" and the like.

[0151] The terms "connected", "coupled" and all their variations mean all direct or indirect connections or combinations between two or more elements, and may include situations where there are one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between elements may be physical, logical, or a combination thereof. For example, "connect" may be replaced by "access". In the context of use in the present disclosure, it can be considered 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 several non-limiting and non-inclusive examples, electromagnetic energy with wavelengths in the radio frequency region, microwave region, and light (both visible and invisible) region is used.

[0152] The reference signal can also be referred to as RS (Reference Signal) for short, and can also be called a pilot according to the application standard.

[0153] The phrase "according to" used in the present disclosure does not mean "only according to" unless otherwise expressly stated. In other words, the phrase "according to" means both "only according to" and "at least according to".

[0154] Any reference to an element using the designations "first" or "second" used in this disclosure does not necessarily limit the number or order of these elements. These designations can be used in this disclosure as a simple method to distinguish between two or more elements. Therefore, reference to the first element and the second element does not mean that only two elements can be used or that the first element must precede the second element in some form.

[0155] The “unit” in the configuration of each of the above-mentioned devices may be replaced with a “section”, “circuit”, “device” or the like.

[0156] In the present disclosure, when the terms "include", "including" and their variations are used, these terms mean inclusively like the term "comprising". Also, the term "or" used in the present disclosure means not exclusive or.

[0157] A radio frame may also be composed of one or more frames in the time domain. In the time domain, one or more individual frames may also be referred to as subframes. Furthermore, a subframe may also be further composed of one or more time slots in the time domain. A subframe may also be a fixed time length (e.g., 1 ms) that is not dependent on a parameter set (numerology).

[0158] A parameter set may be a communication parameter applied to at least one of the transmission and reception of a certain signal or channel. The parameter set may also represent, for example, at least one of a subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), the number of symbols per TTI, a wireless frame structure, a specific filtering process performed by a transceiver in the frequency domain, a specific windowing process performed by a transceiver in the time domain, and the like.

[0159] A time slot may also be composed of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbols, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols, etc.) in the time domain. A time slot may also be a time unit based on a parameter set.

[0160] A time slot may also include multiple mini-slots. Each mini-slot may also be composed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be composed of fewer symbols than a time slot. A PDSCH (or PUSCH) transmitted in units of time greater than a mini-slot may also be referred to as PDSCH (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a mini-slot may also be referred to as PDSCH (or PUSCH) mapping type B.

[0161] 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 may also be referred to by other names corresponding to them.

[0162] For example, 1 subframe is also called a transmission time interval (TTI), multiple consecutive subframes are also called TTI, and 1 time slot or 1 mini time slot is also called TTI. That is, at least one of the subframe and TTI can be a subframe (1ms) in the existing LTE, or a period shorter than 1ms (for example, 1-13 code elements), or a period longer than 1ms. In addition, the unit representing TTI can also be called a time slot, a mini time slot, etc. instead of a subframe.

[0163] Here, TTI refers to, for example, the minimum time unit for scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate wireless resources (frequency bandwidth, transmission power, etc. that can be used in each user device 20) to each user device 20 in units of TTI. In addition, the definition of TTI is not limited to this.

[0164] TTI can be a transmission time unit for channel-coded data packets (transport blocks), code blocks, code words, etc., and can also be a processing unit for scheduling, link adaptation, etc. In addition, when TTI is assigned, the time interval (for example, the number of symbols) to which the transport blocks, code blocks, code words, etc. are actually mapped can also be shorter than the TTI.

[0165] In addition, when 1 time slot or 1 mini time slot is referred to as TTI, one or more TTIs (i.e., one or more time slots or one or more mini time slots) may also be the minimum time unit for scheduling. In addition, the number of time slots (the number of mini time slots) constituting the minimum time unit for scheduling may also be controlled.

[0166] A TTI with a time length of 1 ms may also be referred to as a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a time slot, etc. A TTI shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial TTI (partial or fractional TTI), a shortened subframe, a short subframe, a mini time slot, a sub time slot, a time slot, etc.

[0167] In addition, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced by a TTI having a time length exceeding 1 ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced by a TTI having a TTI length shorter than that of the long TTI and longer than 1 ms.

[0168] A resource block (RB) may also be a resource allocation unit in the time domain and the frequency domain, and in the frequency domain, includes one or more consecutive subcarriers. The number of subcarriers included in an RB is independent of the parameter set and may be the same, for example, 12. The number of subcarriers included in an RB may also be determined according to the parameter set.

[0169] In addition, the time domain of an RB may include one or more symbols, and may also be 1 slot, 1 mini slot, 1 subframe, or 1 TTI in length. 1 TTI, 1 subframe, etc. may also be composed of one or more resource blocks, respectively.

[0170] In addition, one or more RBs may also be referred to as a physical resource block (PRB: Physical RB), a sub-carrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair (PRB pair), an RB pair, etc.

[0171] In addition, a resource block may be composed of one or more resource elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

[0172] A bandwidth part (BWP) (also referred to as partial bandwidth, etc.) may also represent a subset of contiguous common RBs (common resource blocks) for a parameter set in a certain carrier. Here, the common RBs may also be identified by the index of the RB based on the common reference point of the carrier. PRBs may be defined in a certain BWP or may be numbered within the BWP.

[0173] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0174] At least one of the configured BWPs may be activated, and it is not assumed that the UE transmits or receives predetermined signals / channels other than the activated BWP. In addition, "cell", "carrier", etc. in the present disclosure may also be replaced by "BWP".

[0175] The above structures such as radio frames, subframes, time slots, mini-time slots and symbols are only examples. For example, the number of subframes included in a radio frame, the number of time slots in each subframe or radio frame, the number of mini-time slots included in a time slot, the number of symbols and RBs included in a time slot or mini-time slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, and the cyclic prefix (CP) length can be changed in various ways.

[0176] In the present disclosure, when an article is added due to translation, such as a, an, and the in English, the present disclosure may include a case where the noun following the article is plural.

[0177] In the present disclosure, the term "A and B are different" may also mean "A and B are different from each other". In addition, the term may also mean "A and B are different from C, respectively". The terms "separate" and "combined" may also be interpreted as "different".

[0178] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched with execution. In addition, notification of scheduled information is not limited to being performed explicitly (e.g., notification of "yes X"), but may also be performed implicitly (e.g., not notifying the scheduled information).

[0179] In addition, in the present disclosure, DL-SSB is an example of a block including a synchronization signal and broadcast information in a downlink, and SL-SSB is an example of a block including a synchronization signal and broadcast information in a sidelink.

[0180] The present disclosure is described in detail above, but it should be clear to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as a modification and variation without departing from the subject matter and scope of the present disclosure as determined by the claims. Therefore, the purpose of the description of the present disclosure is to illustrate and not to have any limiting meaning on the present disclosure.

[0181] Description of symbols

[0182] 10: Base station device; 110: Transmitting unit; 120: Receiving unit; 130: Setting unit; 140: Control unit; 20: User device; 210: Transmitting unit; 220: Receiving unit; 230: Setting unit; 240: Control unit; 1001: Processor; 1002: Storage device; 1003: Auxiliary storage device; 1004: Communication device; 1005: Input device; 1006: Output device.

Claims

1. A terminal, wherein: The terminal has: a receiving unit that receives information related to resources used to transmit a block including a synchronization signal and broadcast information in inter-terminal communication; as well as a control unit that determines a time slot for transmitting the block based on information related to the resource, The information related to the resource includes: the number of the blocks included in the resource group and the time slot offset from the start position of the radio frame, The information related to the resource also includes information about a bandwidth portion of a resource group configured with the block, The control unit sets the number of blocks and the bandwidth portion included in the resource group based on the information related to the resource, In the case where other resource groups for sending blocks are configured after the resource group for sending the block, the period of the resource group for sending the block is different from the period of the other resource groups for sending blocks.

2. The terminal according to claim 1, wherein: The information associated with the resource includes the time interval between blocks.

3. A communication method performed by a terminal, wherein: The communication method comprises the following steps: receiving information on resources used to transmit a block including a synchronization signal and broadcast information in inter-terminal communication; and The step of determining the time slot for transmitting the block based on information related to the resource, The information related to the resource includes: the number of the blocks included in the resource group and the time slot offset from the start position of the radio frame, The information related to the resource also includes information about a bandwidth portion of a resource group configured with the block, The communication method further comprises the step of setting the number of blocks included in the resource group and the bandwidth portion according to information related to the resource, In the case where other resource groups for sending blocks are configured after the resource group for sending the block, the period of the resource group for sending the block is different from the period of the other resource groups for sending blocks.

4. A communication system, comprising a terminal and other terminals, wherein: The terminal has: a receiving unit that receives information related to resources used to transmit a block including a synchronization signal and broadcast information in inter-terminal communication; as well as a control unit that determines a time slot for transmitting the block based on information related to the resource, The information related to the resource includes: the number of the blocks included in the resource group and the time slot offset from the start position of the radio frame, The information related to the resource also includes information about a bandwidth portion of a resource group configured with the block, The control unit sets the number of blocks and the bandwidth portion included in the resource group based on the information related to the resource, In the case where other resource groups for sending blocks are configured behind the resource group for sending the block, the period of the resource group for sending the block is different from the period of the other resource groups for sending the block, The other terminal includes a receiving unit configured to receive a block including a synchronization signal and broadcast information in the inter-terminal communication.

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