Communication device and communication method

Abstract

The communication device comprises: a receiving unit, which receives information indicating the configuration of a resource pool via a side link; a control unit, which sets the resource pool according to the received information; and a sending unit, which selects a sending resource from the set resource pool and uses the selected sending resource to send a side link signal.

Description

Technical Field

[0001] The present invention relates to a communication 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., LTE-A (LTE Advanced), NR (New Radio) (also known as 5G)), sidelink (also known as D2D (Device to Device)) technology, in which communication devices such as user equipment (UE) communicate directly with each other without going through a base station, is being studied (non-patent document 1).

[0003] In addition, the technology to realize V2X (Vehicle to Everything) is being studied and its standardization is being promoted. Here, V2X refers to a part of ITS (Intelligent Transport Systems), such as Figure 1 As shown, V2X 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 equipment (RSU: Road-Side Unit) installed on the roadside, V2N (Vehicle to Nomadic device) which is a form of communication between vehicles and driver's mobile terminals, and V2P (Vehicle to Pedestrian) which is a form of communication between vehicles and pedestrians' mobile terminals.

[0004] Prior art literature

[0005] Non-patent literature

[0006] Non-patent document 1: 3GPP TS 38.213 V15.4.0 (2018-12)

[0007] Non-patent document 2: 3GPP TS 38.211 V15.4.0 (2018-12)

[0008] Non-patent document 3: 3GPP TS 38.331 V15.4.0 (2018-12) Summary of the invention

[0009] Problem that the invention aims to solve

[0010] At the RAN meeting of 3GPP, a consensus was reached on the following regarding SL transmission mode 2(d) specified in NR's V2X. The user device notifies the base station (gNB) of the members of the user device group. The gNB provides the configuration of a dedicated resource pool and / or the configuration of dedicated resources to the user devices that are members of the group via the same user device. In this case, the user devices that are members of the group do not need to be connected to the gNB. The user device cannot change the settings made by the gNB. When the gNB makes settings for the user device, higher-layer signaling is used. Physical layer signals are not used. This function depends on the function of the user device (UE capability).

[0011] In the case of SL transmission mode 2(d), the communication device performing scheduling receives information indicating the configuration of the resource pool and / or the configuration of the resources from the base station, and it is necessary to clarify the actions of each communication device when the communication device performing scheduling notifies each communication device in the group of the information indicating the configuration of the resource pool and / or the configuration of the resources.

[0012] Means used to solve problems

[0013] According to one embodiment of the present invention, a communication device is provided, which comprises: a receiving unit, which receives information indicating the configuration of a resource pool via a side link; a control unit, which sets the resource pool according to the received information; and a sending unit, which selects a sending resource in the set resource pool and uses the selected sending resource to send a signal of the side link.

[0014] Effects of the Invention

[0015] According to the embodiment, in the case of mode 2(d), the operation of each communication device when the scheduling communication device transmits information indicating the configuration of the resource pool to each communication device in the group is clarified. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a diagram for explaining V2X.

[0017] Figure 2A It is a diagram for explaining a side link.

[0018] Figure 2B It is a diagram for explaining a side link.

[0019] Figure 3 This is a diagram for explaining a MAC PDU used in side link communication.

[0020] Figure 4 This is a diagram for explaining the format of the SL-SCH subheader.

[0021] Figure 5 This is a diagram for explaining an example of a channel structure used in a side link in LTE-V2X.

[0022] Figure 6 It is a diagram showing a configuration example of a wireless communication system according to an embodiment.

[0023] Figure 7 This is a diagram for explaining the resource selection operation of the communication device.

[0024] Fig. 8A This is a diagram showing an overview of SL transmission mode 1 specified in NR's V2X.

[0025] Figure 8B It is a diagram showing an overview of SL transmission mode 2a.

[0026] Figure 8C This is a diagram showing an overview of SL transmission mode 2c.

[0027] Fig.8D It is a diagram showing an overview of SL transmission mode 2d.

[0028] Fig. 9A is a diagram showing an example of unicast PSCCH / PSSCH transmission.

[0029] Fig. 9B is a diagram showing an example of multicast PSCCH / PSSCH transmission.

[0030] Fig. 9C is a diagram showing an example of broadcast PSCCH / PSSCH transmission.

[0031] Fig.10 FIG. 1 is a diagram showing an example in which a plurality of resources are selected in the resource selection window.

[0032] Fig.11 FIG. 1 is a diagram showing an example in which a plurality of resources are selected in the resource selection window.

[0033] Fig.12 is a diagram showing an example of a resource pool used by a group of communication devices 20 in the case of option 3A.

[0034] Fig.13 3B is a diagram showing an example of a resource pool used by a group of communication devices 20 in the case of option 3B.

[0035] Fig.14 This is a diagram showing an example of a functional configuration of a base station according to an embodiment.

[0036] Fig.15 This is a diagram showing an example of a functional configuration of a communication device according to an embodiment.

[0037] Fig.16 This is a diagram showing an example of the hardware configuration of a base station and a communication device involved in the embodiment. DETAILED DESCRIPTION

[0038] Hereinafter, an embodiment of the present invention (this embodiment) will be described with reference to the drawings. Note that the embodiment described below is only an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

[0039] It is assumed that the method of direct communication between communication devices in this embodiment is the side link (SL (Sidelink)) of LTE or NR, but the method of direct communication is not limited to this method. In addition, the name "side link" is an example, and it is also possible to assume that UL (Uplink) includes the function of SL without using the name "side link". Regarding SL, it can be distinguished from DL (Downlink) or UL by the difference in frequency or time resources, or it can be called by other names.

[0040] In addition, regarding UL and SL, they can be distinguished by the differences between any one or any combination of time resources, frequency resources, time / frequency resources, reference signals used for determining path loss in transmit power control, and reference signals used for synchronization (PSS / SSS / PSSS / SSSS).

[0041] For example, in UL, the reference signal of antenna port X is used as the reference signal for determining the path loss (Pathloss) in transmit power control, and in SL (including UL used as SL), the reference signal of antenna port Y is used as the reference signal for determining the path loss (Pathloss) in transmit power control.

[0042] In addition, in this embodiment, the communication device is mainly 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 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 capabilities, etc.

[0043] (Overview of Side Link)

[0044] In this embodiment, since the side link is used as the basic technology, first, as a basic example, the outline of the side link is described. The example of the technology described here is the technology specified in Rel.14 of 3GPP, etc. This technology can be used in NR, and a technology different from this technology can also be used in NR. Here, side link communication can be defined as direct communication between two or more adjacent user devices without passing through a network node while using E-UTRA technology. The side link can be defined as an interface between user devices in side link communication.

[0045] The sidelink is roughly divided into "discovery" and "communication". Regarding "discovery", Figure 2A As shown, a resource pool for discovery messages is configured in each discovery period, and a communication device (called UE) sends a discovery message (discovery signal) in the resource pool. In more detail, there are Type 1 and Type 2b. In Type 1, the communication device autonomously selects transmission resources from the resource pool. In Type 2b, semi-static resources are allocated through high-layer signaling (e.g., RRC signal).

[0046] Regarding "communication", Figure 2BAs shown, the resource pool for SCI (Sidelink Control Information: sidelink control information) / data transmission is periodically set. The communication device on the transmitting side selects resources from the control resource pool (PSCCH resource pool) and uses SCI to notify the receiving side of the data transmission resources (PSSCH resource pool), etc., and sends data through the data transmission resources. Regarding "communication", in more detail, there are mode 1 (Mode 1) and mode 2 (Mode 2). In mode 1 (Mode 1), resources are dynamically allocated through the (E) PDCCH ((Enhanced) Physical Downlink Control Channel: (Enhanced) Physical Downlink Control Channel) sent from the base station to the communication device. In mode 2 (Mode 2), the communication device autonomously selects transmission resources from the resource pool. Regarding the resource pool, a pre-defined resource pool using SIB notification, etc. can be used.

[0047] In addition, in Rel-14, in addition to Mode 1 (Mode 1) and Mode 2 (Mode 2), there are also Mode 3 (Mode 3) and Mode 4 (Mode 4). In Rel-14, SCI and data can be sent simultaneously (through one subframe) using adjacent resource blocks (source blocks) in the frequency direction. In addition, SCI is sometimes referred to as SA (scheduling assignment).

[0048] The channel used in "discovery" is called PSDCH (Physical Sidelink Discovery Channel), the channel used to send control information such as SCI in "communication" is called PSCCH (Physical Sidelink Control Channel), and the channel used to send data is called PSSCH (Physical Sidelink Shared Channel). PSCCH and PSSCH have a PUSCH-based structure and become a structure in which DMRS (Demodulation Reference Signal) is inserted.

[0049] like Figure 3As shown, the MAC (Medium Access Control) PDU (Protocol Data Unit) used in the side link is composed of at least a MAC header, a MAC control element, a MAC SDU (Service Data Unit), and padding. The MAC PDU may also contain other information. The MAC header is composed of an SL-SCH (Sidelink Shared Channel) subheader and one or more MAC PDU subheaders.

[0050] like Figure 4 As shown, the SL-SCH subheader is composed of a MAC PDU format version (V), source information (SRC), destination information (DST), a reserved bit (R), etc. V is assigned at the beginning of the SL-SCH subheader, indicating the MAC PDU format version used by the communication device. Information related to the source is set in the source information. An identifier related to the ProSe UE ID can also be set in the source information. Information related to the destination is set in the destination information. Information related to the ProSe Layer-2 Group ID of the destination can also be set in the destination information.

[0051] Figure 5 An example of the channel structure of the side link in LTE-V2X is shown. Figure 5 As shown, a resource pool for PSCCH and a resource pool for PSSCH used in "communication" are allocated. In addition, a resource pool for PSDCH used in "discovery" is allocated at a period longer than the period of the channel for "communication". In addition, PSDCH can also be included in NR-V2X.

[0052] In addition, PSSS (Primary Sidelink Synchronization signal) and SSSS (Secondary Sidelink Synchronization signal) are used as synchronization signals for the sidelink. In addition, for example, in order to perform operations outside the coverage area, PSBCH (Physical Sidelink Broadcast Channel) is used to send broadcast information (broadcast information) such as the system frequency band, frame number, resource configuration information, etc. of the sidelink. PSSS / SSSS and PSBCH are sent, for example, through one subframe. PSSS / SSSS can be called SLSS.

[0053] In addition, the V2X envisioned in this embodiment is a method related to "communication". However, in this embodiment, there may not be a distinction between "communication" and "discovery". In addition, the technology involved in this embodiment can also be applied to "discovery".

[0054] (System Structure)

[0055] Figure 6 FIG. 1 is a diagram showing a configuration example of a wireless communication system according to the present embodiment. Figure 6 As shown in FIG. 1 , the wireless communication system according to the present embodiment includes a base station 10, a communication device 20A, and a communication device 20B. In addition, there may be a plurality of communication devices, but Figure 6 The communication device 20A and the communication device 20B are shown as examples.

[0056] exist Figure 6 In the figure, the communication device 20A represents the transmitting side and the communication device 20B represents the receiving side, but both the communication device 20A and the communication device 20B have both the transmitting function and the receiving function. In the following, when there is no special distinction between the communication devices 20A, 20B, etc., they are all simply referred to as "communication device 20" or "communication device". Figure 6 In the figure, as an example, a situation in which the communication device 20A and the communication device 20B are both within the coverage area is shown, but the actions in this embodiment can also be applied to any situation in which all the communication devices 20 are within the coverage area, a situation in which a part of the communication devices 20 are within the coverage area and another part of the communication devices 20 are outside the coverage area, and a situation in which all the communication devices 20 are outside the coverage area.

[0057] In this embodiment, the communication device 20 is a device mounted on a vehicle such as a car, and has a cellular communication function and a side link function as a UE in LTE or NR. In addition, the communication device 20 includes a function of obtaining a GPS device, a camera, various sensors, etc., and reporting information (location, event information, etc.). In addition, the communication device 20 may also be a general portable terminal (smartphone, etc.). In addition, the communication device 20 may also be an RSU. The RSU may also be a UE type RSU (UE type RSU) having the function of a UE, or a BS type RSU (BS type RSU) having the function of a base station (also referred to as a gNB type RSU (gNB type RSU)) or a relay station.

[0058] For example, even when various sensors are dispersedly arranged in the vehicle, the device including the various sensors is also the communication device 20. Furthermore, the communication device 20 may not include various sensors but may have the function of transmitting and receiving data with the various sensors.

[0059] In addition, the processing content of the sidelink transmission of the communication device 20 is basically the same as the processing content of the UL transmission in LTE or NR. For example, the communication device 20 scrambles and modulates the codeword of the transmission data to generate complex-valued symbols, maps the complex-valued symbols (transmission signal) to layer 1 or layer 2, and performs precoding. Then, the precoded complex-valued symbols are mapped to resource elements to generate a transmission signal (e.g., CP-OFDM, DFT-s-OFDM), and transmitted from each antenna port.

[0060] In addition, the base station 10 has a cellular communication function as a base station 10 in LTE or NR, and a function capable of performing communication of the communication device 20 in this embodiment (for example, resource pool setting, resource allocation, etc.). In addition, the base station 10 can be an RSU (gNB type RSU), a relay station, or a communication device with a scheduling function.

[0061] In addition, in the wireless communication system involved in the present embodiment, the signal waveform used by the communication device 20 in SL or UL may be OFDMA, SC-FDMA, or other signal waveforms. In addition, in the wireless communication system involved in the present embodiment, as an example, a frame consisting of multiple subframes (for example, 10 subframes) is formed in the time direction, and is composed of multiple subcarriers in the frequency direction. 1 subframe is an example of 1 transmission time interval (TTI: Transmission Time Interval). However, TTI is not limited to subframes. For example, TTI can be a time slot or a mini-time slot, other time domain units, etc. In addition, the number of time slots per subframe can also be determined based on the subcarrier spacing. In addition, the number of code elements (symbol) per time slot can be 14 code elements.

[0062] In this embodiment, the communication device 20 can adopt any of the following modes: a mode in which resources are dynamically allocated through (E)PDCCH ((Enhanced)Physical Downlink Control Channel) sent from the base station 10 to the communication device, i.e., mode 1; a mode in which the communication device autonomously selects transmission resources from a resource pool, i.e., mode 2; a mode in which resources for SL signal transmission are allocated from the base station 10 (hereinafter referred to as mode 3); and a mode in which resources for SL signal transmission are autonomously selected (hereinafter referred to as mode 4). For example, the base station 10 sets the mode for the communication device 20.

[0063] like Figure 7 As shown, the communication device of mode 4 (in Figure 7 In the figure, it is shown that the UE selects wireless resources from the synchronized common time-frequency grid. For example, the communication device 20 performs sensing in the background, determines the resources with good sensing results and not reserved by other communication devices as candidate resources, and selects the resources used in the transmission from the candidate resources.

[0064] (Overview of NR's V2X)

[0065] In NR's V2X, the same transmission modes as those specified in LTE's V2X, namely SL transmission mode 3 and SL transmission mode 4, are specified.

[0066] Below, refer to Figures 8A to 8D, an overview of the transmission mode specified in NR's V2X is described.

[0067] Fig. 8A This is a diagram showing an overview of SL transmission mode 1 specified in NR's V2X. SL transmission mode 1 specified in NR's V2X corresponds to SL transmission mode 3 specified in LTE's V2X. In SL transmission mode 1 specified in NR's V2X, the base station 10 schedules transmission resources and allocates transmission resources to the communication device 20A on the transmission side. The communication device 20A uses the allocated transmission resources to transmit a signal to the communication device 20B on the receiving side.

[0068] Figure 8B , Figure 8C as well as Fig.8D This is a diagram showing an overview of SL transmission mode 2 specified in NR's V2X. SL transmission mode 2 specified in NR's V2X corresponds to SL transmission mode 4 specified in LTE's V2X.

[0069] Figure 8B This is a diagram showing an overview of SL transmission mode 2a. In SL transmission mode 2a, for example, a communication device 20A on the transmitting side autonomously selects a transmission resource and transmits a signal to a communication device 20B on the receiving side using the selected transmission resource.

[0070] Figure 8C This is a diagram showing an overview of SL transmission mode 2c. In SL transmission mode 2c, for example, the base station 10 sets a transmission resource of a certain period in advance for the communication device 20A, and the communication device 20A uses the transmission resource of a certain period set in advance to transmit a signal to the communication device 20B on the receiving side. Here, for example, instead of the base station 10 setting the transmission resource of a certain period in advance for the communication device 20A, the transmission resource of a certain period may be set in advance for the communication device 20A according to the specification.

[0071] Fig.8DThis is a diagram showing an overview of SL transmission mode 2d. In SL transmission mode 2d, for example, the communication device 20 performs the same operation as the base station 10. Specifically, the communication device 20 schedules transmission resources and allocates transmission resources to the communication device 20A on the transmission side. The communication device 20A can use the allocated communication resources to transmit to the communication device 20B on the receiving side. That is, the communication device 20 can control the transmission of other communication devices 20.

[0072] In addition, in NR, as Figures 9A to 9C As shown, three types of communication, unicast, multicast, and broadcast, are currently being studied as types of communication.

[0073] Fig. 9A 1 is a diagram showing an example of unicast PSCCH / PSSCH transmission. For example, unicast refers to a one-to-one transmission from a communication device 20A on the transmitting side to a communication device 20B on the receiving side.

[0074] Fig. 9B 2 is a diagram showing an example of multicast PSCCH / PSSCH transmission. For example, multicast refers to transmission from the communication device 20A on the transmitting side to the communication device 20B and the communication device 20B' which are a group of the communication devices 20 on the receiving side.

[0075] Fig. 9C 2 is a diagram showing an example of broadcast PSCCH / PSSCH transmission. For example, broadcast refers to transmission from the communication device 20A on the transmitting side to all the communication devices 20 on the receiving side within a predetermined range, namely, the communication device 20B, the communication device 20B' and the communication device 20B".

[0076] Regarding mode 2(d), the transmission Fig.8D The communication device 20 that transmits the scheduling information of the SL shown is, for example, referred to as a scheduling communication device 20 (scheduling user device: S-UE). Below, for the sake of convenience, the communication device that transmits the scheduling information of the SL to the communication device 20 that is a member of the group of communication devices 20 is referred to as the scheduling communication device 20. Here, the scheduling communication device 20 may not set the resource pool. For example, the scheduling communication device 20 may receive information indicating the configuration of the resource pool set by the base station 10 from the base station 10, and notify other communication devices 20 of the information indicating the configuration of the resource pool. Therefore, the sending Fig.8DThe communication device 20 for transmitting the scheduling information of the SL shown in the figure may also be referred to as a relay device. Fig.8D The communication device 20 showing the scheduling information of the SL may be a user device for which specific parameters are set by a higher layer.

[0077] Here, regarding mode 2(d), sending Fig.8D It is not yet determined at this moment what kind of information the communication device 20 showing the SL scheduling information sends to other communication devices 20. However, it is assumed that the communication device 20 sending the SL scheduling information sends the resource pool configuration and / or resource configuration to each communication device 20 in the group.

[0078] Here, in the RAN meeting of 3GPP, the following contents were agreed upon regarding Mode 2(d).

[0079] The user device notifies the base station (gNB) of the members of the user device group. The gNB provides the configuration of a dedicated resource pool and / or the configuration of dedicated resources to the user devices that are members of the group via the same user device. In this case, the user devices that are members of the group do not need to be connected to the gNB. The user device cannot change the settings made by the gNB. When the gNB makes settings for the user device, high-layer signaling is used. The signal of the physical layer is not used. This function depends on the function of the user device (UE capability).

[0080] (About the topic)

[0081] The details of the information indicating the configuration of the resource pool and / or the configuration of the resources provided by the base station 10 and provided by the scheduling communication device 20 (S-UE) to each communication device 20 in the group have not yet been determined. In addition, the details of the actions of the user devices in the group that receive the information indicating the configuration of the resource pool and / or the configuration of the resources have not yet been determined.

[0082] Next, an example of operation (method) is described in which, in mode 2(d), the scheduling communication device 20 (S-UE) receives information indicating the configuration of the resource pool and / or the configuration of resources to be transmitted to each communication device 20 in the group from the base station 10.

[0083] (Option 1)

[0084] Option 1 is a method of sharing the configuration of the resource pool set by the base station 10 among the members of the group of communication devices 20. Option 1 is advantageous in that a limited resource pool shared among limited members of the group of communication devices 20 is used, and thus control for preventing interference is easy. That is, each communication device 20 of the group member senses in the allocated resource pool and selects a resource to transmit a wireless signal.

[0085] First, the base station 10 sets one or more resource pools to be shared within the group of communication devices 20. The base station 10 notifies the scheduling communication device 20 within the group of communication devices 20 of information indicating the configuration of the one or more resource pools. The scheduling communication device 20 that has received the information indicating the configuration of the one or more resource pools notifies (relays) the information indicating the configuration of the one or more resource pools to all communication devices 20 that are members of the group or to some of the communication devices 20 among all members of the group.

[0086] When one or more resource pools are set for a group of communication devices 20, the action of the communication system composed of a base station 10, a scheduling communication device 20, and each communication device 20 as a member of the group can be any of the following modes 1 (pattern 1), 2 (pattern 2), and 3 (pattern 3).

[0087] (pattern 1)

[0088] The base station 10 explicitly sets which communication device 20 is notified of information indicating which resource pool is configured for the scheduled communication device 20. For example, when the communication device 20A, the communication device 20B, the communication device 20C, and the communication device 20D are included in one group, the base station 10 can explicitly instruct the scheduled communication device 20 to make the communication device 20A and the communication device 20B use the resource pool 1, and make the communication device 20C and the communication device 20D use the resource pool 2.

[0089] (pattern 2)

[0090] The scheduling communication device 20 determines which communication device 20 to notify of information indicating the configuration of which resource pool, depending on the installation of the scheduling communication device 20 .

[0091] (pattern 3)

[0092] The scheduling communication device 20 is set to use either the above-mentioned pattern 1 or pattern 2 by using a high-level parameter.

[0093] The scheduling communication device 20 may set an autonomous resource selection method for other communication devices 20 to be executed in one or more resource pools.

[0094] For example, the scheduling communication device 20 may indicate to the communication devices 20 that are members of the group the granularity of selecting resources and / or resource modes to be used within one or more resource pools. For example, the granularity of resource selection may be Fig.10 or Fig.11 After the resource selection window is specified by the scheduling communication device 20, the communication device 20 selects multiple resources in the resource selection window in order to send data. Fig.10 As shown, the communication device 20 can independently select multiple resources. Alternatively, as Fig.11 As shown, when the communication device 20 selects the first resource in the resource selection window, one or more other resources are associated in the resource selection window, and thus, the one or more other resources can be automatically selected.

[0095] Alternatively, the base station 10 may set the granularity for selecting the resources and / or resource pattern to be used by the communication device 20 as a member of the group, and notify the scheduling communication device 20 of information indicating the granularity set by the base station 10. The scheduling communication device 20 may notify the communication device 20 as a member of the group of the information indicating the received granularity.

[0096] After being notified by the scheduling communication device 20 of information representing the configuration of one or more resource pools, each communication device 20 can continue to maintain the resource selection action of mode 2(a) or mode 2(c) set before the scheduling communication device 20 notifies the information representing the configuration of one or more resource pools.

[0097] When the base station 10 notifies the scheduling communication device 20 of information indicating the configuration of one or more resource pools, the notification may be performed through high-layer signaling or physical layer signaling. For example, the base station 10 may notify the information indicating the configuration of one or more resource pools through a system information block (SIB), a radio resource control (RRC) signaling, or a downlink control information (DCI). That is, the scheduling communication device 20 may receive information indicating the configuration of one or more resource pools via SIB / RRC signaling / DCI.

[0098] When the scheduling communication device 20 notifies other communication devices 20 of information indicating the configuration of one or more resource pools, the notification may be performed through high-layer signaling or physical layer signaling. For example, the scheduling communication device 20 may use PC5-RRC (RRC signaling in the sidelink) or sidelink control information (Sidelink Control Information: SCI) to notify other communication devices 20 of information indicating the configuration of one or more resource pools. Here, PC5-RRC is high-layer signaling sent from a user device to other user devices.

[0099] The configuration of one or more resource pools represented by the information notified by the base station 10 to the scheduling communication device 20 and notified (relayed) by the scheduling communication device 20 to other communication devices 20 (i.e., the configuration of the resource pool of mode 2(d)) is set to be different from the configuration of other resource pools that are not relayed (pre-set resource pools of mode 1, mode 2(a), mode 2(c), etc.), and can be distinguished based on the difference in configuration. Therefore, by distinguishing the configuration of the pre-set resource pool from the resource pool in the case of mode 2(d), conflicts between the resources of mode 2(d) and the resources of other modes can be easily avoided.

[0100] The communication device 20 that receives information indicating the configuration of one or more resource pools from the scheduling communication device 20 can select resources of a physical sidelink control channel (PSCCH), resources of a physical sidelink shared channel (PSSCH), or resources of a physical sidelink feedback channel (PSFCH) in the one or more resource pools by using the set resource selection method. In addition, when the scheduling communication device 20 does not set a resource selection method for the communication device 20, the communication device 20 can autonomously determine the resource selection method.

[0101] (Option 2)

[0102] Option 2 is a method of allocating a dedicated resource pool (a resource pool orthogonal to other resource pools) to each communication device 20 as a member of the group. Therefore, each communication device 20 can directly transmit a wireless signal using resources of the allocated resource pool without performing sensing.

[0103] In option 2, the base station 10 sets a dedicated resource pool for each communication device 20 in the group of communication devices 20. The base station 10 notifies the scheduling communication device 20 of information indicating the dedicated resource pool set for each communication device 20 in the group of communication devices 20, and the scheduling communication device 20 notifies each communication device 20 of information indicating the dedicated resource pool set for the communication device 20.

[0104] That is, the resources (or resource pool) set for a certain communication device 20 in the group of communication devices 20 are orthogonal to the resources (or resource pools) set for the other communication devices 20 in the group of communication devices 20 .

[0105] When a plurality of resource pools are set for a group of communication devices 20, any of the following operations, Pattern 1, Pattern 2, and Pattern 3, can be assumed.

[0106] (pattern 1)

[0107] The base station 10 explicitly sets, in the scheduling communication device 20 , which communication device 20 is to be notified of information indicating which resource pool is allocated.

[0108] (pattern 2)

[0109] The scheduling communication device 20 determines which communication device 20 to notify of information indicating the configuration of which resource pool, depending on the installation of the scheduling communication device 20 .

[0110] (pattern 3)

[0111] The scheduling communication device 20 is set to use which mode of the above-mentioned pattern 1 (pattern 1) and pattern 2 (pattern 2) through the parameters of the higher layer.

[0112] As described above, each communication device 20 in the group of communication devices 20 set with a dedicated resource pool can directly transmit a wireless signal without performing background sensing, etc. That is, the communication device 20 does not perform autonomous resource selection based on sensing.

[0113] Furthermore, each communication device 20 in the group of communication devices 20 for which a dedicated resource pool is set can transmit a PSCCH signal, a PSSCH signal, and / or a PSFCH signal via resources of the set dedicated resource pool.

[0114] When the base station 10 notifies the scheduling communication device 20 of information indicating the configuration of one or more resource pools, the notification can be performed through high-layer signaling or physical layer signaling. For example, the base station 10 can notify the information indicating the configuration of one or more resource pools through a system information block (SIB), a radio resource control (RRC) signaling, or a downlink control information (DCI). That is, the scheduling communication device 20 can receive information indicating the configuration of one or more resource pools via SIB / RRC signaling / DCI.

[0115] When the scheduling communication device 20 notifies other communication devices 20 of information indicating the configuration of one or more resource pools, the notification can be performed through high-layer signaling or physical layer signaling of the side link. For example, the scheduling communication device 20 can use PC5-RRC (RRC signaling in the side link) or sidelink control information (Sidelink Control Information: SCI) to notify other communication devices 20 of information indicating the configuration of one or more resource pools.

[0116] (Option 3)

[0117] Option 3 uses both Option 1 and Option 2. Option 3 is classified into Option 3A and Option 3B as described below. Here, although it is considered that in the case of Option 1, a certain degree of resource conflict may occur, it is advantageous in that resources can be used without waste. In the case of Option 2, although resource conflict can be avoided, the resources that can be used are limited, and a large amount of resources may be consumed. Option 3 is a method obtained by combining the advantageous contents of Option 1 with the advantageous contents of Option 2.

[0118] (Option 3A)

[0119] Fig.12 is a diagram showing an example of a resource pool used by a group of communication devices 20 in the case of Option 3A. Fig.12 The resources shaded in the middle represent resources allocated exclusively to any communication device 20 in the group of communication devices 20. Fig.12 Resources other than the resources indicated by hatching in the illustrated frame are resources shared by the group of communication devices 20 .

[0120] Assigned with Fig.12The communication device 20 with dedicated resources shown can directly transmit PSCCH signals, PSSCH signals and / or PSFCH signals via the allocated dedicated resources without sensing. In addition, in the absence of appropriate dedicated resources for transmitting PSCCH signals, PSSCH signals and / or PSFCH signals, the communication device performs resource selection based on sensing in a shared resource pool.

[0121] (Option 3B)

[0122] Fig.13 3B is a diagram showing an example of a resource pool used by a group of communication devices 20 in the case of Option 3B. Currently, in the standardization of 3GPP, a reservation signal for reserving resources to be used so as not to be used by other users is being studied. Fig.13 In the example, dedicated resources are allocated to each communication device 20 only for the reservation signal.

[0123] Regarding the actual transmission of the PSCCH, PSSCH, and PSFCH that are reserved and used by the reservation signal, Fig.13 The selection of resources is performed in the shared resource pool outside the shadowed part.

[0124] The communication device 20 receives the PSCCH signal, that is, receives the reserved signal, in the allocated dedicated resources.

[0125] Next, the communication device 20 senses the PSCCH signal received via dedicated resources in the shared resource pool, that is, one or more resources reserved by the reserved signal, thereby selecting resources for sending PSCCH signals, PSSCH signals and / or PSFCH signals, that is, data.

[0126] In addition, as the SCI transmitted by the PSCCH for decoding the PSSCH, it is being studied to transmit the SCI in two or three steps. In this case, the following is being studied to notify the SCI in several stages: that is, in the first SCI, a simple indication for reception regarding which resource to use is given, and in the second SCI, a more detailed indication for decoding is given. In this case, resources for transmitting the PSCCH signal can be additionally selected.

[0127] The PSCCH resources used to receive the reserved signal and the resources used to transmit the corresponding data, that is, the transmission of the PSCCH signal, the PSSCH signal, and the PSFCH signal can be associated.

[0128] The association between the PSCCH resource for receiving the reserved signal and the resource for sending the corresponding data can be set in advance. The scheduling communication device 20 receives information indicating the association set in advance by decoding the SIB, RRC signaling, or DCI received from the base station 10. The scheduling communication device 20 can notify the communication device 20 that is a member of the group of the information indicating the received association set in advance. PC5-RRC or SCI can be used for this notification.

[0129] Each communication device 20 as a member of the group needs to perform blind decoding to receive the PSCCH in the resources used for reception of the reserved signal, that is, in the resources orthogonal between the communication devices 20 as members of the group. Fig.13 In the example of , each communication device 20 as a member of the group performs blind decoding in a portion of the dedicated resource pool shown by shading.

[0130] In addition, the resource pool of the dedicated PSCCH resources and the resource pool of the additionally selected PSCCH resources may be different resource pools. Fig.13 As shown in the example of , the resource pool of dedicated PSCCH resources and the resource pool of additionally selected PSCCH resources may also be the same resource pool.

[0131] In the case where the communication device 20 in the group performs autonomous resource selection, in order not to select a dedicated resource, the scheduling communication device 20 may notify all the communication devices 20 in the group of the dedicated resource of one communication device 20. The notification may be performed through high-layer signaling or physical layer signaling of the side link. For example, the scheduling communication device 20 may use PC5-RRC or SCI to notify other communication devices 20 of information indicating the dedicated resource.

[0132] (Device Structure)

[0133] Next, a functional configuration example of the base station 10 and the communication device 20 that perform the processing operations described above will be described.

[0134] <Base station 10>

[0135] Fig.14 1 is a diagram showing an example of the functional configuration of the base station 10. Fig.14 As shown, the base station 10 includes a transmission unit 101 , a reception unit 102 , a setting information management unit 103 , and a control unit 104 . Fig.14 The functional configuration shown is only an example. As long as the operations involved in this embodiment can be performed, the functional division and the names of the functional units can be arbitrary. In addition, the transmission unit 101 can be called a transmitter, and the reception unit 102 can be called a receiver.

[0136] The transmission unit 101 includes a function of generating a signal to be transmitted to the communication device 20 side and transmitting the signal wirelessly. The reception unit 102 includes a function of receiving various signals transmitted from the communication device 20 and obtaining, for example, higher layer information from the received signal. In addition, the reception unit 102 includes a function of measuring the received signal and obtaining a quality value.

[0137] The setting information management unit 103 stores the setting information set in advance, the setting information received from the communication device 20, and the like. In addition, the setting information related to transmission may be stored in the transmission unit 101, and the setting information related to reception may be stored in the reception unit 102. The control unit 104 controls the base station 10. In addition, the function of the control unit 104 related to transmission may be included in the transmission unit 101, and the function of the control unit 104 related to reception may be included in the reception unit 102.

[0138] For example, the configuration information management unit 103 may include information indicating the configuration of the resource pool. For example, when setting a resource pool shared by the communication devices 20 in the group, the control unit 104 reads information indicating the configuration of the resource pool to be set from the configuration information management unit 103, and causes the control unit 104 to include the information in the signal for the transmission unit 101 to transmit. In addition, for example, when setting resource pools individually for the communication devices 20 in the group, the control unit 104 may read information indicating the configuration of the resource pool individually set for each communication device 20 from the configuration information management unit 103, and causes the control unit 104 to include the information in the signal for the transmission unit 101 to transmit.

[0139] <Communication device 20>

[0140] Fig.15 2 is a diagram showing an example of the functional structure of the communication device 20. Fig.15 As shown, the communication device 20 includes a transmission unit 201 , a reception unit 202 , a setting information management unit 203 , and a control unit 204 . Fig.15 The functional structure shown is only an example. As long as the actions involved in this embodiment can be performed, the functional distinction and the name of the functional unit can be arbitrary. In addition, the sending unit 201 can be called a transmitter, and the receiving unit 202 can be called a receiver. In addition, the communication device 20 can be a communication device 20A on the sending side, or a communication device 20B on the receiving side. In addition, the communication device 20 can also be a scheduling communication device 20.

[0141] The transmission unit 201 generates a transmission signal based on the transmission data and transmits the transmission signal wirelessly. The reception unit 202 receives various signals wirelessly and obtains a higher layer signal from the received physical layer signal. In addition, the reception unit 202 includes a function of measuring the received signal and obtaining a quality value.

[0142] The setting information management unit 203 stores the setting information set in advance, the setting information received from the base station 10, and the like. In addition, the setting information related to transmission may be stored in the transmission unit 201, and the setting information related to reception may be stored in the reception unit 202. The control unit 204 controls the communication device 20. In addition, the function of the control unit 204 related to transmission may be included in the transmission unit 201, and the function of the control unit 204 related to reception may be included in the reception unit 202.

[0143] When the communication device 20 is a scheduled communication device 20, the receiving unit 202 receives information indicating the configuration of the resource pool set by the base station 10 for the communication device 20 in the group by receiving a higher-layer signal such as RRC signaling from the base station 10. In addition, when the communication device 20 is a communication device 20 in the group, the receiving unit 202 receives information indicating the configuration of the resource pool set by the base station 10 for the communication device 20 in the group by receiving PC5-RRC (RRC parameters in the sidelink) or sidelink control information (Sidelink Control Information) (SCI) and the like transmitted from the scheduled communication device 20. The control unit 204 sets the resource pool based on the higher-layer signal, the RRC parameters in the sidelink, or the SCI received by the receiving unit 202. When the resource pool set by the control unit 204 is a resource pool shared in the group of the communication device 20, the transmitting unit 201 selects a resource for transmitting a wireless signal by sensing, and transmits the wireless signal using the resource. Furthermore, when the resource pool set by the control unit 204 is a dedicated resource pool for the communication device 20 , the transmission unit 201 directly selects resources for transmitting wireless signals from the resource pool, and transmits wireless signals using the selected resources.

[0144] In the case where the resource pool set by the control unit 204 is a resource pool obtained by combining a resource pool shared by the group of communication devices 20 and a dedicated resource pool for each communication device 20 in the group, if the transmission unit 201 can use the resources of the dedicated resource pool, it directly selects the resources of the dedicated resource pool to transmit the PSCCH signal, the PSSCH signal and / or the PSFCH signal without sensing. In addition, when there are no appropriate resources for transmitting the PSCCH signal, the PSSCH signal and / or the PSFCH signal in the dedicated resource pool, the transmission unit 201 performs sensing in the shared resource pool to select resources, and uses the selected resources to transmit the PSCCH signal, the PSSCH signal and / or the PSFCH signal.

[0145] In the case where the resource pool set by the control unit 204 is a resource pool obtained by combining a resource pool shared in the group of communication devices 20 and a dedicated resource pool for each communication device 20 in the group to receive a reservation signal, the receiving unit 202 performs blind decoding in the dedicated resource pool to receive the reservation signal (PSCCH signal). When the receiving unit 202 receives the reservation signal, the transmitting unit 201 selects a resource by sensing one or more resources reserved by the reservation signal in the shared resource pool, and transmits a PSCCH signal, a PSSCH signal, and / or a PSFCH signal, that is, transmits data.

[0146] <Hardware Structure>

[0147] The block diagram used in the description of the above embodiment ( Figure 14-15) shows 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, there is no particular limitation on the means for implementing each functional block. That is, each functional block can be implemented by a device that is physically or logically combined, or two or more devices that are physically or logically separated can be directly or indirectly (for example, using wires, wirelessly, etc.) connected and implemented by these multiple devices. The functional block can also be implemented by combining software with the above-mentioned device or the above-mentioned multiple devices. Functionally, it has the functions of judging, determining, determining, 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 is not limited to these. For example, a functional block (structural unit) that enables transmission is called a transmitting unit or a transmitter. In short, as described above, there is no particular limitation on the implementation method.

[0148] Furthermore, for example, the communication device 20 and the base station 10 in one embodiment of the present invention may both function as computers that perform the processing according to the present embodiment. Fig.16 1 is a diagram showing an example of the hardware configuration of the communication device 20 and the base station 10 involved in this embodiment. The communication device 20 and the base station 10 described above can be respectively configured as a computer device that physically includes a processor 1001, a memory 1002 (memory), a storage 1003 (storage), a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

[0149] In the following description, the word "device" may be replaced by "circuit", "equipment (device)", "unit (unit)", etc. The hardware structure of the communication device 20 and the base station 10 may be configured to include one or more of the devices shown in 1001 to 1006 in the figure, or may be configured to exclude some of the devices.

[0150] In addition, each function in the communication device 20 and the base station 10 is implemented by the following method: predetermined software (program) is read into hardware such as the processor 1001 and the memory 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 memory 1002 and the storage 1003.

[0151] 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 above-mentioned baseband signal processing unit 104, call processing unit 105, etc. may be implemented by the processor 1001.

[0152] In addition, the processor 1001 reads a program (program code), a software module or data, etc. from at least one of the memory 1003 and the communication device 1004 to the memory 1002, and performs various processes accordingly. As a program, a program that causes a computer to perform at least a part of the actions described in the above-mentioned embodiments is used. For example, the control unit 204 of the communication device 20 can be implemented by a control program stored in the memory 1002 and performed in the processor 1001, and other functional blocks can also be implemented in the same way. In addition, with regard to the above-mentioned various processes, although it is described that the above-mentioned various processes are performed by one processor 1001, the above-mentioned various processes can also be performed simultaneously or sequentially by more than two processors 1001. The processor 1001 can also be installed by more than one chip. In addition, the program can also be sent from the network via a telecommunication line.

[0153] The memory 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 memory 1002 may also be referred to as a register, a cache, a main memory (main storage device), etc. The memory 1002 may store executable programs (program codes), software modules, etc., for implementing a wireless communication method according to an embodiment of the present disclosure.

[0154] The memory 1003 is a computer-readable recording medium, and may be composed of at least one of an optical disk such as a CD-ROM (Compact Disc 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 memory 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 memory 1002 and the memory 1003.

[0155] The communication device 1004 is hardware (transceiver) 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, it may be referred to as a network device, a network controller, a network card, a communication module, etc. The communication device 1004 may be configured to include a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., for example, in order to realize at least one of frequency division duplex (FDD: Frequency Division Duplex) and time division duplex (TDD: Time Division Duplex).

[0156] 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).

[0157] In addition, the processor 1001, the memory 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 for each device.

[0158] In addition, the communication device 20 and the base station 10 can be respectively configured to include hardware such as a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array), and a part or all of each functional block can also be implemented by the hardware. For example, the processor 1001 can also be installed using at least one of these hardware.

[0159] (Summary of Implementation Methods)

[0160] This specification discloses at least the following communication device and communication method.

[0161] A communication device, comprising: a receiving unit, which receives information indicating the configuration of a resource pool via a side link; a control unit, which sets the resource pool based on the received information; and a sending unit, which selects a sending resource from the set resource pool and uses the selected sending resource to send a side link signal.

[0162] With the above configuration, in the case of pattern 2(d), the operation of each communication device after the scheduling communication device transmits information indicating the allocation of the resource pool to each communication device in the group is clarified.

[0163] The information received by the receiving unit may represent the configuration of a resource pool shared by a plurality of communication devices, and the transmitting unit may sense the shared resource pool to select the transmitting resource. According to this structure, although some degree of resource conflict may occur, it is advantageous in that resources can be used without waste.

[0164] The information received by the receiving unit may indicate the configuration of a dedicated resource pool of the communication device, and the transmitting unit may select the transmission resource from the dedicated resource pool without performing sensing. According to this configuration, resource conflicts can be avoided.

[0165] The information received by the receiving unit may represent a configuration of a resource pool obtained by combining a resource pool shared between multiple communication devices and a dedicated resource pool for each of the multiple communication devices, and the sending unit may select any resource in the dedicated resource pool of the communication device as the sending resource without performing sensing when the resource can be used. According to this structure, the following operation can be performed: that is, when the dedicated resource can be used, the resource is directly selected for sending without performing sensing, and when the dedicated resource cannot be used, sensing is performed to perform communication.

[0166] The information received by the receiving unit may represent a configuration of a resource pool obtained by combining a resource pool shared by a plurality of communication devices with a dedicated resource pool for each of the plurality of communication devices, the receiving unit may perform blind decoding in the dedicated resource pool to receive a reservation signal, and the transmitting unit may sense one or more resources in the shared resource pool that are reserved by the reservation signal to select the transmission resource. According to this structure, the resources to be used can be reserved so as not to be used by other users.

[0167] A communication method performed by a communication device, the communication method having the following steps: receiving information indicating the configuration of a resource pool via a side link; setting the resource pool based on the received information; and selecting a transmission resource in the set resource pool, and using the selected transmission resource to send a side link signal.

[0168] (Supplementary Implementation Methods)

[0169] The above describes the 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, corrections, 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 (plural) functional units can be performed by one physical component, or the actions of one functional unit can be performed by multiple (plural) physical 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 communication device 20 and the base station 10 are described using functional block diagrams, but such devices can also be implemented by hardware, software, and a combination thereof. The software that operates through the processor of the communication device 20 according to the embodiment of the present invention and the software that operates through the processor of the base station 10 according to the embodiment of the present invention may also be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server and any other appropriate storage medium.

[0170] 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 also be referred to as an RRC message, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, etc.

[0171] Each form / embodiment 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-Wide Band), Bluetooth (registered trademark), systems using other appropriate systems, and next-generation systems 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.

[0172] The processing procedures, timings, processes, etc. of each form / implementation described in this disclosure may be changed in order without 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.

[0173] In the present disclosure, specific actions performed by the base station 10 are sometimes performed by its upper node according to the situation. In a network composed of one or more network nodes having the base station 10, various actions performed to communicate with a terminal can be performed by at least one of the base station 10 and other network nodes other than the base station 10 (for example, MME or S-GW, etc., but not limited to these). In the above, the case where there is one other network node other than the base station 10 is illustrated, but the other network node may also be a combination of multiple other network nodes (for example, MME and S-GW).

[0174] 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.

[0175] The determination may be made by a value represented by one 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).

[0176] Each form / implementation described in the present disclosure may be used alone or in combination, and may be switched according to 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).

[0177] Software, whether referred to as software, firmware, middleware, microcode, hardware description language, or by other names, shall be interpreted broadly to refer to commands, sets of commands, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc.

[0178] 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.

[0179] The information, signals, etc. described in the present disclosure may also be represented by any of a variety of different technologies. For example, data, commands, instructions, 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 thereof.

[0180] 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 code element may also be a signal (signaling). In addition, a signal may also be a message.

[0181] The terms "system" and "network" used in this disclosure may be used interchangeably. In addition, the information, parameters, etc. described in this disclosure may be expressed using absolute values, relative values ​​to predetermined values, or other corresponding information. For example, wireless resources may also be indicated by indexes.

[0182] The names used for the above parameters are not limiting in any way. Furthermore, the formulas etc. using these parameters may sometimes differ from those explicitly stated in this disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by appropriate names, and therefore the various names assigned to these various channels and information elements are not limiting in any way.

[0183] In the present 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", "component carrier" and the like are used interchangeably. Base stations are sometimes referred to as macrocells, small cells, femtocells, picocells, etc.

[0184] A base station can accommodate one or more (for example, 3) 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 a base station and a base station subsystem that provide communication services within the coverage area.

[0185] In the present disclosure, terms such as “mobile station (MS)”, “user terminal (user terminal)”, “user equipment (UE)”, and “terminal” may be used interchangeably.

[0186] 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, handset, user agent, mobile client, client, or some other appropriate terms.

[0187] 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 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 in an unmanned manner (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 during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0188] In addition, the base station in the present disclosure may also be replaced by a user terminal. For example, with respect to a structure in which the communication between a base station and a user terminal is replaced by the communication between multiple user terminals (for example, it may also be referred to as D2D (Device-to-Device), V2X (Vehicle-to-Everything, etc.), the various forms / implementations of the present disclosure may also be applied. In this case, it may also be a structure in which the user terminal 20 has the functions possessed by the above-mentioned base station 10. In addition, statements 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.

[0189] Likewise, the user terminal in the present disclosure may be replaced by a base station. In this case, the base station 10 may be configured to have the functions of the user terminal 20 described above.

[0190] The terms "connected", "coupled" or all variations of these terms are intended to indicate any direct or indirect connection or combination between two or more elements, including the situation where there is one or more intermediate elements between the two elements that are "connected" or "coupled" to each other. The combination or connection between the elements can be a physical combination or connection, a logical combination or connection, or a combination of these. For example, "access" can be used to replace "connection". In the case used in this disclosure, for two elements, it can be considered that they are "connected" or "coupled" to each other by using at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-inclusive examples, by using electromagnetic energy such as electromagnetic energy with wavelengths in the wireless frequency domain, microwave region and light (including both visible and invisible) region.

[0191] The reference signal may be referred to as RS (Reference Signal) for short, or may be referred to as a pilot signal according to the applied standard.

[0192] 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".

[0193] When the terms "include," "including," and variations thereof are used in the present disclosure, these terms are intended to be inclusive, as is the term "comprising." Furthermore, the term "or" used in the present disclosure does not mean an exclusive or.

[0194] In the present disclosure, when an article is added by translation, such as a, an, and the in English, for example, the present disclosure also includes the case where the noun following the article is in plural form.

[0195] In the present disclosure, the phrase "A and B are different" may also mean "A and B are different from each other". In addition, the phrase may also mean "A and B are different from C, respectively". The phrases such as "separate" and "combine" may also be interpreted as "different".

[0196] The present invention has been described in detail above, but it should be clear to those skilled in the art that the present invention is not limited to the embodiments described in this specification. The present invention can be implemented as a modification and variation without departing from the gist and scope of the present invention as determined by the claims. Therefore, the purpose of the description of the present invention is to illustrate and not to have any limiting significance on the present invention.

[0197] Description of labels:

[0198] 10 Base Station

[0199] 20 Communication devices

[0200] 101 Sending Department

[0201] 102 Receiving Department

[0202] 103 Setting Information Management Department

[0203] 104 Control Department

[0204] 201 Sending Department

[0205] 202 Receiving Department

[0206] 203 Setting Information Management Department

[0207] 204 Control Department

[0208] 1001 Processor

[0209] 1002 Memory

[0210] 1003 Memory

[0211] 1004 Communication device

[0212] 1005 Input Device

[0213] 1006 Output Device

Claims

1. A terminal, wherein: The terminal has: a receiving unit that receives setting information indicating a configuration of a resource pool and including information indicating a resource selection window from a base station using a system information block SIB; a control unit, which sets a resource pool according to the setting information, and selects resources at a granularity of a resource selection window indicated by the information indicating the resource selection window; and A sending unit sends the setting information to other terminals.

2. The terminal according to claim 1, wherein: The transmitting unit transmits the setting information to other terminals using radio resource control signaling (RRC signaling) in a side link.

3. A communication system, comprising a terminal and a base station, wherein: The terminal has: a receiving unit that receives setting information indicating a configuration of a resource pool and including information indicating a resource selection window from a base station using a system information block SIB; a control unit, which sets a resource pool according to the setting information, and selects resources at a granularity of a resource selection window indicated by the information indicating the resource selection window; and a sending unit, which sends the setting information to other terminals, The base station has: A sending unit sends the setting information to the terminal.

4. A communication method performed by a terminal, wherein: The communication method comprises the following steps: receiving, from a base station using a system information block SIB, setting information indicating configuration of a resource pool and including information indicating a resource selection window; According to the setting information, a resource pool is set, and resources are selected with the resource selection window indicated by the information indicating the resource selection window as the granularity; as well as The setting information is sent to other terminals.

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