WO2020152902A1 - Terminal and channel state information notification method - Google Patents

Abstract

A terminal comprising: a control unit that derives channel state information of a side link and puts the derived channel state information of the side link into a designated field of format of side link control information; and a transmission unit that transmits the side link control information of the format via the channel of a side link designated by the control unit.

Description

Terminal and channel state information notification method

The present invention relates to a terminal and a channel state information notification method in a wireless communication system.

In LTE (Long Term Evolution) and a successor system to LTE (eg, LTE-A (LTE Advanced), NR (New Radio) (also referred to as 5G)), terminals such as UE directly communicate with each other without going through a base station. A side link (also referred to as D2D (Device to Device)) technology to be performed is under study (Non-patent document 1).

Also, the realization of V2X (Vehicle to Everything) is being studied and specifications are being advanced. Here, V2X is a part of ITS (Intelligent Transport Systems), and as shown in FIG. 1, V2V (Vehicle to Vehicle), which means a form of communication between vehicles, is installed on the side of a vehicle and a road. V2I (Vehicle to Infrastructure), which means the form of communication with a road-side unit (RSU), and V2N (Vehicle to), which means the form of communication between the car and the mobile terminal of the driver. It is a generic term for Nomadic device) and V2P (Vehicle to Pedestrian), which means a communication mode between a car and a pedestrian's mobile terminal.

A terminal communicating with the side link is caused to measure a signal received by the side link, and the terminal notifies the side link channel state information to, for example, another terminal, thereby more appropriately scheduling the side link communication. It becomes possible to do it.

-A technology is required that enables the terminal to be notified of the side link channel state information via an appropriate side link channel.

According to an aspect of the present invention, a control unit that derives side-link channel state information, and includes the derived side-link channel state information in a designated field of a format of the side-link control information; A terminal having a transmitter that transmits the sidelink control information via a sidelink channel designated by the controller.

According to the embodiment, a technology is provided that enables the terminal to be notified of the side link channel state information via an appropriate side link channel.

It is a figure for demonstrating V2X. It is a figure for demonstrating a side link. It is a figure for demonstrating a side link. FIG. 6 is a diagram for explaining a MAC PDU used for side link communication. It is a figure for demonstrating the format of SL-SCH subheader. It is a figure for demonstrating the example of the channel structure used by a side link. It is a figure which shows the structural example of the radio|wireless communications system which concerns on embodiment. It is a figure for demonstrating the resource selection operation of a terminal. It is a figure which shows the outline of SL transmission mode 1 prescribed by V2X of NR. It is a figure which shows the outline of SL transmission mode 2a. It is a figure which shows the outline of SL transmission mode 2c. It is a figure which shows the outline of SL transmission mode 2d. It is a figure which shows the example of unicast PSCCH/PSSCH transmission. It is a figure which shows the example of group cast PSCCH/PSSCH transmission. It is a figure which shows the example of broadcast PSCCH/PSSCH transmission. FIG. 6 is a diagram showing an operation example of Example 1; FIG. 8 is a diagram showing an operation example of Example 2; It is a figure which shows the operation example of the example 3. It is a figure which shows the modification of the operation example of Example 3. It is a figure which shows an example of a functional structure of the base station which concerns on embodiment. It is a figure showing an example of functional composition of a terminal concerning an embodiment. It is a figure which shows an example of the hardware constitutions of the base station and terminal which concern on embodiment.

Embodiments of the present invention will be described below with reference to the drawings. The embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the following embodiments.

The direct communication method between the terminals in the present embodiment is assumed to be LTE or NR side link (SL (Sidelink)), but the direct communication method is not limited to this method. Further, the name “side link” is an example, and the name “side link” may not be used, and UL (Uplink) may include the function of SL. SL may be distinguished from DL (Downlink) or UL by a difference in frequency or time resources, or may be another name.

Further, the UL and SL refer to reference signals for determining Pathloss in time resources, frequency resources, time/frequency resources, transmission power control, reference signals used for synchronization (PSS/SSS/PSSS/SSSS). ) May be distinguished by a difference in any one or a combination of any two or more.

For example, in UL, the reference signal of the antenna port X is used as a reference signal that is referred to for determining Pathloss in transmission power control, and in SL (including UL used as SL), Pathloss is determined in transmission power control. The reference signal of the antenna port Y is used as the reference signal for the reference.

Also, in the present embodiment, it is mainly assumed that the terminal is mounted in a vehicle, but the embodiment of the present invention is not limited to this form. For example, the terminal may be a terminal held by a person, the terminal may be a device installed in a drone or an aircraft, and the terminal may have a base station, an RSU, a relay station (relay node), and a scheduling capability. It may be a user device or the like.

(Outline of side link)
In the present embodiment, the side link is used as a basic technique, so first, as a basic example, an outline of the side link will be described. An example of the technique described here is 3GPP Rel. It is a technology specified in 14 and the like. The technique may be used in NR, or a technique different from the technique may be used in NR.

The side links are roughly divided into "discovery" and "communication". As for “discovery”, as shown in FIG. 2A, a resource pool for Discovery message is configured (configured) for each Discovery period, and a terminal (which may be referred to as UE) has a Discovery message ( (Discovery signal) is transmitted. More specifically, there are Type 1 and Type 2b. In Type 1, the terminal autonomously selects a transmission resource from the resource pool. In Type 2b, quasi-static resources are allocated by higher layer signaling (eg, RRC signal).

As for “communication”, as shown in FIG. 2B, SCI (Sidelink Control Information)/resource pool for data transmission is periodically set. The terminal on the transmission side notifies the reception side of the resource for data transmission (PSSCH resource pool) and the like by SCI with the resource selected from the control resource pool (PSCCH resource pool), and transmits the data by the resource for data transmission. Regarding “communication”, there are mode 1 and mode 2 in more detail. In mode 1, resources are dynamically allocated by (E)PDCCH ((Enhanced) Physical Downlink Control Channel) sent from the base station to the terminal. In mode 2, the terminal autonomously selects a transmission resource from the resource pool. For the resource pool, a predefined one is used such as being notified by SIB.

Also, Rel-14 has Mode 3 and Mode 4 in addition to Mode 1 and Mode 2. With Rel-14, it is possible to transmit SCI and data simultaneously (in one subframe) in resource blocks adjacent in the frequency direction. Note that SCI may be referred to as SA (scheduling assignment).

The channel used for "discovery" is called PSDCH (Physical Sidelink Discovery Channel), and the channel for transmitting control information such as SCI in "communication" is called PSCCH (Physical Sidelink Control Channel), and the channel for transmitting data is It is called PSSCH (Physical Sidelink Shared Channel). The PSCCH and PSSCH have a PUSCH-based structure, and have a structure in which DMRS (Demodulation Reference Signal, demodulation reference signal) is inserted.

As shown in FIG. 3, a MAC (Medium Access Control) PDU (Protocol Data Unit) used for a side link is composed of at least a MAC header, a MAC Control element, a MAC SDU (Service Data Unit), and a padding. The MAC PDU may include other information. The MAC header is composed of one SL-SCH (Sidelink Shared Channel) subheader and one or more MAC PDU subheaders.

As shown in FIG. 4, the SL-SCH subheader is composed of a MAC PDU format version (V), transmission source information (SRC), transmission destination information (DST), reserved bit (R), and the like. V is assigned to the head of the SL-SCH subheader and indicates the MAC PDU format version used by the terminal. Information related to the transmission source is set in the transmission source information. An identifier related to the ProSe UE ID may be set in the transmission source information. Information regarding the destination is set in the destination information. Information relating to the destination ProSe Layer-2 Group ID may be set in the destination information.

Figure 5 shows an example of the side link channel structure. As shown in FIG. 5, a PSCCH resource pool and a PSSCH resource pool used for “communication” are allocated. Further, the PSDCH resource pool used for “discovery” is allocated at a cycle longer than the cycle of the “communication” channel.

Also, PSSS (Primary Sidelink Synchronization signal) and SSSS (Secondary Sidelink synchronization signal) are used as side link synchronization signals. In addition, for example, a PSBCH (Physical Sidelink Channel) that transmits broadcast information (broadcast information) such as a side link system band, frame number, and resource configuration information for out-of-coverage operation is used. PSSS/SSSS and PSBCH are transmitted in one subframe, for example. PSSS/SSSS may be referred to as SLSS.

Note that V2X assumed in this embodiment is a method related to "communication". However, in the present embodiment, the distinction between “communication” and “discovery” may not exist. Further, the technique according to the present embodiment may be applied in “discovery”.

(System configuration)
FIG. 6 is a diagram showing a configuration example of the wireless communication system according to the present embodiment. As shown in FIG. 6, the wireless communication system according to this embodiment includes a base station 10, a terminal 20A, and a terminal 20B. Although many terminals may actually exist, FIG. 6 shows the terminals 20A and 20B as an example.

In FIG. 6, the terminal 20A is intended to be the transmitting side and the terminal 20B is intended to be the receiving side, but both the terminals 20A and 20B have both a transmitting function and a receiving function. Hereinafter, the terminals 20A, 20B and the like will be simply referred to as “terminal 20” or “terminal” unless otherwise distinguished. In FIG. 6, as an example, the case where both the terminal 20A and the terminal 20B are in the coverage is shown, but the operation in the present embodiment is performed when all the terminals 20 are in the coverage and when some of the terminals 20 are in the coverage. It can be applied to both the case where the terminal 20 is within the coverage and the terminal 20 on the other side is out of the coverage, and the case where all the terminals 20 are out of the coverage.

In the present embodiment, the terminal 20 is, for example, a device mounted on a vehicle such as an automobile, and has a function of cellular communication as a UE in LTE or NR and a side link function. Furthermore, the terminal 20 includes a GPS device, a camera, various sensors, and the like, and a function of acquiring report information (position, event information, and the like). Further, the terminal 20 may be a general mobile terminal (smartphone or the like). Moreover, the terminal 20 may be an RSU. The RSU may be a UE type RSU having a UE function, a BS type RSU having a base station function (may be referred to as a gNB type UE), or a relay station.

Note that the terminal 20 does not have to be a device in one housing, and, for example, even when various sensors are dispersedly arranged in the vehicle, the device including the various sensors is the terminal 20. Further, the terminal 20 may be provided with a function of transmitting and receiving data to and from various sensors without including the various sensors.

Also, the processing content of the side link transmission of the terminal 20 is basically the same as the processing content of the UL transmission in LTE or NR. For example, the terminal 20 scrambles the codeword of the transmission data, modulates the codeword to generate complex-valued symbols, maps the complex-valued symbols (transmission signal) to one or two layers, and performs precoding. Then, the precoded complex-valued symbols are mapped to resource elements to generate a transmission signal (eg CP-OFDM, DFT-s-OFDM) and transmit from each antenna port.

Regarding the base station 10, a function of cellular communication as the base station 10 in LTE or NR and a function for enabling communication of the terminal 20 in the present embodiment (eg, resource pool setting, resource allocation, etc.). )have. Also, the base station 10 may be an RSU (gNB type RSU), a relay station, or a terminal having a scheduling function.

Further, in the wireless communication system according to the present embodiment, the signal waveform used by terminal 20 for SL or UL may be OFDMA, SC-FDMA, or any other signal waveform. May be. Further, in the wireless communication system according to the present embodiment, as an example, a frame composed of a plurality of subframes (eg, 10 subframes) is formed in the time direction, and a plurality of subcarriers are formed in the frequency direction. Become. One subframe is an example of one transmission time interval (TTI: Transmission Time Interval). However, the TTI is not always a subframe. For example, the TTI may be slot or mini-slot, or any other unit of the time domain. Also, the number of slots per subframe may be determined according to the subcarrier interval. Further, the number of symbols per slot may be 14 symbols.

In this embodiment, the terminal 20 has a mode 1 in which resources are dynamically allocated by (E)PDCCH ((Enhanced) Physical Downlink Control Channel) sent from the base station 10 to the terminal, and the terminal autonomously allocates resources. Mode 2 which is a mode for selecting transmission resources from the pool, mode in which resources for SL signal transmission are allocated from the base station 10 (hereinafter referred to as mode 3), and resources for SL signal transmission are autonomously selected. Any of the modes (hereinafter referred to as mode 4) can be adopted. The mode is set from the base station 10 to the terminal 20, for example.

As shown in FIG. 7, the terminal of mode 4 (shown as UE in FIG. 7) selects a wireless resource from the synchronized common time/frequency grid. For example, the terminal 20 performs sensing in the background, identifies a resource that has a good sensing result and is not reserved in another terminal as a candidate resource, and selects a resource to be used for transmission from the candidate resources. To do.

(Outline of NR V2X)
In NR V2X, the same transmission modes as SL transmission mode 3 and SL transmission mode 4 which are defined in LTE V2X are defined.

Hereinafter, an outline of the transmission mode defined by the V2X of NR will be described with reference to FIGS. 8A to 8D.

FIG. 8A is a diagram showing an outline of SL transmission mode 1 defined by V2X of NR. The SL transmission mode 1 defined by V2X of NR corresponds to the SL transmission mode 3 defined by V2X of LTE. In SL transmission mode 1 defined by NR V2X, the base station 10 schedules transmission resources and allocates the transmission resources to the terminal 20A on the transmission side. The terminal 20A transmits a signal to the terminal 20B on the receiving side by the assigned transmission resource.

8B, 8C, and 8D are diagrams showing an outline of the SL transmission mode 2 defined by V2X of NR. The SL transmission mode 2 specified by V2X of NR corresponds to the SL transmission mode 4 specified by V2X of LTE.

FIG. 8B is a diagram showing an outline of the SL transmission mode 2a. In the SL transmission mode 2a, for example, the transmission side terminal 20A autonomously selects a transmission resource and transmits a signal to the reception side terminal 20B by the selected transmission resource.

FIG. 8C is a diagram showing an outline of the SL transmission mode 2c. In the SL transmission mode 2c, for example, the base station 10 presets a transmission resource (resource pattern (resource pattern)) of a fixed cycle to the terminal 20A, and the terminal 20A has a preset fixed cycle. The signal is transmitted to the terminal 20B on the receiving side by the transmission resource (resource pattern). Here, instead of the base station 10 setting transmission resources (resource patterns) of a constant cycle in advance for the terminal 20A, for example, transmission resources (resource patterns) of a constant cycle are transmitted to the terminal 20A according to the specifications. It may be set in advance.

FIG. 8D is a diagram showing an outline of the SL transmission mode 2d. In the SL transmission mode 2d, for example, the terminal 20 performs the same operation as the base station 10. Specifically, the terminal 20 schedules transmission resources and allocates the transmission resources to the terminal 20A on the transmission side. The terminal 20A transmits a signal to the terminal 20B on the receiving side by using the allocated communication resource. That is, the terminal 20 may control transmission of another terminal 20.

Also, in NR, as shown in FIGS. 9A to 9C, three types of communication, unicast, group cast, and broadcast, are currently under consideration as the types of communication.

FIG. 9A is a diagram showing an example of unicast Physical Sidelink Shared Channel (PSCCH)/Physical Sidelink Control Channel (PSSCH) transmission. Unicast means, for example, one-to-one transmission from the terminal 20A on the transmitting side to the terminal 20B on the receiving side.

FIG. 9B is a diagram showing an example of group cast PSCCH/PSSCH transmission. The group cast refers to, for example, transmission from the terminal 20A on the transmission side to the terminals 20B and 20B′, which is a group of the terminals 20 on the reception side.

FIG. 9C is a diagram showing an example of broadcast PSCCH/PSSCH transmission. Broadcast refers to, for example, transmission from the terminal 20A on the transmitting side to all the terminals 20 on the receiving side within a predetermined range, that is, the terminals 20B, 20B′, and 20B″.

In LTE V2X, Hybrid Automatic Repeat reQuest (HARQ) was not supported. On the other hand, in NR V2X, support for HARQ is under study. Therefore, the NR defines Sidelink Feedback Control Information (SFCI), and HARQ-ACK is assumed to be transmitted via SFCI. Further, Physical Sidelink Feedback Channel (PSFCH) is specified as a channel for transmitting the SFCI. It has been agreed to send the SFCI over the PSFCH.

(About measurement configuration)
According to Non-Patent Document 3, the network can set the RRC-connected user equipment to perform the measurement according to the measurement configuration and notify the measurement result.

The network can set the user equipment to measure the Synchronization Signal (SS)/Physical Broadcast Channel (PBCH) block and notify the measurement result.

In addition, the network can set the user device to perform measurement for each Channel State Information (CSI)-Reference Signal (RS) resource and notify the measurement result.

In this case, the network specifies parameters (measurement objects) that specify the measurement target (SS/PBCH block, S-PSS/S-SSS/PSBCH, CSI-RS, etc.) in the measurement configuration for setting the measurement by the user equipment. ) And report settings (report trigger, reference signal type, report format, etc.) including parameters (reporting configurations) that specify them, to perform measurement and notify the network of measurement results. The user device can be configured to

As described in the following embodiments, by applying the method of measuring and notifying the channel state information (CSI) based on the measurement configuration in the existing NR as described above, without significantly changing the system, It is possible to notify the terminal 20 communicating with the side link of the channel state information of the side link communication. In addition, in the following embodiment, an embodiment relating to notification of channel state information (CSI: Channel State Information) of aperiodic (Aperiodic) side link communication will be described. However, the embodiment of the present invention is not limited to the notification of the channel state information of the aperiodic side link communication, and is also applied to, for example, the notification of the CSI of the semi-persistent (semi-persistent) side link communication. It is possible. For example, the content of requesting (triggering) the notification of CSI is replaced with the content of activating the notification of CSI of the side link communication, so that the content of the following embodiments can be changed to the CSI of the semi-persistent side link communication. It is possible to apply to the notification of.

(Example 1)
In Example 1, the terminal 20B that has received the CSI request (measurement configuration) of the side link communication from the terminal 20A measures the signal (reference signal, etc.) to be measured specified by the CSI request of the side link communication. , The terminal state information (CSI) of the side link communication obtained by measuring the signal is notified to the terminal 20A via the PSFCH or PSSCH.

A specific operation example will be described with reference to FIG. FIG. 10 shows, as an operation example, a case of SL transmission mode 1 of NR V2X. However, the present embodiment is not limited to the SL transmission mode 1 and can be applied to the SL transmission mode 2 of NR V2X. Furthermore, all or part of the present embodiment can be applied to the NR V2X SL transmission mode 2a, and can also be applied to the NR V2X SL transmission mode 2c. Is.

First, in step S101, the base station 10 transmits a side link communication CSI request (measurement configuration) to the terminal 20A.

In response to receiving the CSI request for the side link communication, the terminal 20A transmits (transfers) the CSI request for the side link communication to the terminal 20B in step S102.

In response to receiving the CSI request for the side link communication, the terminal 20B transmits a signal (SS/PBCH block, S-PSS/S-SSS/PSBCH, based on the CSI request for the side link communication in step S103). CSI-RS etc.) is measured, the CSI of the side link communication is derived, and the derived CSI of the side link communication is notified to the terminal 20A.

In response to receiving the CSI of the side link communication from the terminal 20B, the terminal 20A notifies the base station 10 of the CSI of the side link communication received in step S104.

In this way, the base station 10 that has received the CSI of the side link communication from the terminal 20A may schedule the PSFCH and/or the PSSCH based on the received CSI of the side link communication. This makes it possible to more appropriately schedule the side link communication between the terminal 20A and the terminal 20B.

(Option 1)
In the above operation example, the base station 10 sets the CSI request (measurement configuration) of the side link communication so that the terminal 20B measures the PSFCH and notifies the result of the measurement. Good.

(Option 2)
Additionally or alternatively, the base station 10 sets the CSI request (measurement configuration) of the side link communication so that the terminal 20B measures the PSSCH and notifies the result of the measurement. May be.

(Option 3)
Further, in the above operation example, the base station 10 may include the CSI request of the side link communication in the downlink control information for scheduling (scheduling downlink control information (DCI)) and transmit it to the terminal 20A. At this time, in the CSI request of the side link communication notified to the terminal 20A, a signal for channel state measurement (SS/PBCH block, S-PSS/S-SSS/PSBCH, CSI-RS, etc.) is sent to the terminal 20A. Instructions for sending may be included. In addition, the CSI request of the side link communication notified to the terminal 20A is used to notify the terminal 20A or the base station 10 of the measurement result obtained by measuring the signal transmitted from the terminal 20A at the terminal 20B. The user equipment identity (UE-ID) of 20A and the UE-ID of terminal 20B may be included. Additionally, the CSI request of the side link communication notified to the terminal 20A is for notifying the terminal 20A or the base station 10 of the measurement result obtained by measuring the signal transmitted from the terminal 20A at the terminal 20B. It may include information. Alternatively, the CSI request of the side link communication notified to the terminal 20A includes information for notifying the base station 10 of the measurement result obtained by measuring the signal transmitted from the terminal 20B at the terminal 20A. You can leave. Additionally or alternatively, the side link communication CSI request notified to the terminal 20A is transmitted from the terminal 20B and the measurement result obtained by measuring the signal transmitted from the terminal 20A at the terminal 20B. It may include information for notifying the base station 10 of the measurement result obtained by measuring the signal at the terminal 20A.

(Option 4)
Further, in the above operation example, since the CSI request for side link communication is notified to the terminal 20B via the terminal 20A, the reporting configuration included in the CSI request for side link communication set in the upper layer is: It may be the same between the terminal 20A and the terminal 20B.

(Option 5)
Further, in the above operation example, when the base station 10 includes the CSI request of the side link communication in the DCI for scheduling and transmits it to the terminal 20A, the DCI for scheduling is the Uu interface (of the base station 10 and the terminal 20A). Information for specifying the resource for notifying the CSI of the side link communication in the interface (between the terminals) and/or the DCI for the scheduling may be included in the SL interface (the interface between the terminals 20A and 20B). It may include information for designating a resource for notifying CSI of the side link communication.

(Option 6)
Further, in the above operation example, the transmission of the CSI request of the side link communication from the base station 10 to the terminal 20A in step S101 and the notification of the CSI of the side link communication from the terminal 20A to the base station 10 in step S104 are omitted. In this case, the terminal 20A transmits scheduling sidelink control information (SCI) including a CSI request for sidelink communication to the terminal 20B, and the terminal 20A transmits the measurement result from the terminal 20B to the PSFCH. Alternatively, it corresponds to the operation of receiving via the PSSCH. Therefore, the above-described operation example can be applied to the SL transmission mode 2a of V2X of NR and can also be applied to the SL transmission mode 2c of V2X of NR. In addition, when a CSI request for sidelink communication associated with the CSI notification setting (CSI reporting setting) of the sidelink communication is transmitted from the terminal 20A to the terminal 20B without passing through the base station 10, in the terminals 20A and 20B, The setting of CSI notification of the same side link communication may be performed.

(Example 2)
In Example 2, the terminal 20B that has received the side link communication CSI request (measurement configuration) from the terminal 20A measures the signal (reference signal, etc.) to be measured specified by the side link communication CSI request. , And notifies the base station 10 of the channel state information (CSI) of the side link communication obtained by measuring the signal via the Physical Uplink Control Channel (PUCCH) or the Physical Uplink Shared Channel (PUSCH).

A specific operation example will be described with reference to FIG. Note that the above-mentioned Options 1 to 6 can be applied to the second example after making appropriate changes as necessary.

First, in step S201, the base station 10 transmits a side link communication CSI request (measurement configuration) to the terminal 20A.

In response to receiving the CSI request for the side link communication, the terminal 20A transmits the CSI request for the side link communication to the terminal 20B in step S202.

In response to receiving the CSI request for the side link communication, the terminal 20B transmits a signal (SS/PBCH block, S-PSS/S-SSS/PSBCH, based on the CSI request for the side link communication in step S203). CSI-RS, etc.) is measured, the CSI of the side link communication is derived, and the derived CSI of the side link communication is notified to the base station 10.

In this way, the base station 10 that has received the CSI of the side link communication from the terminal 20B may schedule the PSFCH and/or the PSSCH based on the received CSI of the side link communication. This makes it possible to more appropriately schedule the side link communication between the terminal 20A and the terminal 20B.

The route for notifying the CSI of the side link communication shown in FIG. 11 is only the route from the terminal 20B to the base station 10. Therefore, according to the route for notifying the CSI of the side link communication shown in FIG. 11, the route for notifying the CSI of the side link communication shown in FIG. 10, that is, from the terminal 20B to the terminal 20A via the base station It is possible to reduce the transmission resources for notifying the CSI of the side link communication as compared with the route reaching 10.

(Example 3)
In Example 3, the base station 10 transmits a CSI request for side link communication to the terminal 20B on the receiving side and receives the CSI for side link communication from the terminal 20B on the receiving side. Unlike the cases of the above-described Examples 1 and 2, the base station 10 does not instruct the terminal 20A on the transmitting side to aperiodically transmit the signal for measuring the channel state information of the side link communication. In this case, for example, the receiving-side terminal 20B uses the periodic measurement target signal (SS/PBCH block, S-PSS/S-SSS/PSBCH, CSI-RS, etc.) transmission from the transmitting-side terminal 20A. Then, the CSI of the side link communication can be calculated.

A specific operation example will be described with reference to FIG. 12A.

In step S301, the base station 10 transmits a CSI request for side link communication to the terminal 20B on the receiving side. At this time, the base station 10 does not instruct the transmission-side terminal 20A to aperiodically transmit the signal for measuring the channel state information of the side link communication.

In step S302, the receiving-side terminal 20B uses the transmission of the measurement target signal (SS/PBCH block, S-PSS/S-SSS/PSBCH, CSI-RS, etc.) from the transmitting-side terminal 20A to perform the side link. The communication CSI is calculated, and the calculated side link communication CSI is transmitted to the base station 10.

In Example 3, the terminal 20B transmits the CSI of the side link communication in which the measurement target signal (CSI-RS or the like) is aperiodic or the semi-persistent measurement target signal (CSI-RS or the like) is transmitted. 12B, in step S301′, the base station 10 transmits an aperiodic measurement target signal (CSI-RS or the like) to the terminal 20A on the transmitting side, or performs semi-transmission in step S301′. It is also possible to request the transmission of a persistent measurement target signal (CSI-RS, etc.) and notify the terminal 20B on the receiving side of the CSI request of the side link communication. The terminal 20A on the transmission side that has received the request from the base station 10 transmits an aperiodic measurement target signal (CSI-RS or the like) or a semi-persistent measurement target signal (CSI-RS) in step S302′. Etc.) and the receiving side terminal 20B receives the aperiodic measurement target signal (CSI-RS, etc.) or the received semi-persistent measurement target signal (CSI-RS, etc.). The CSI of the side link communication may be calculated based on the above, and the calculated CSI of the side link communication may be transmitted to the base station 10.

(Example 4)
In Example 4, the terminal 20 that transmits the CSI of the side link communication may be switched according to an instruction from the base station 10 or another terminal 20 or a situation.

For example, the terminal 20 that transmits the CSI of the side link communication may be switched according to the format of the DCI from the base station 10. For example, when the DCI format transmitted from the base station 10 is the DCI format A, the method described in Example 1 may be applied. Further, for example, when the DCI format transmitted from the base station 10 is the DCI format B, the method described in Example 2 may be applied.

Also, for example, the terminal 20 that transmits the CSI of the side link communication may be switched according to the SL transmission mode. For example, in the case of SL transmission mode1, the method described in Example 1 may be applied. Further, in the case of SL transmission mode 2d, the method described in Example 2 may be applied.

Further, for example, the terminal 20 transmitting the CSI of the side link communication may be switched according to the PUCCH/PUSCH resource.

Further, for example, the index of CORSET including the CSI request of the sidelink communication in the DCI including the CSI request of the sidelink communication, or the index of the CCE including the CSI request of the sidelink communication in the DCI including the CSI request of the sidelink communication. According to the above, the terminal 20 that transmits the CSI of the side link communication may be switched.

Also, the terminal 20 that transmits the CSI of the side link communication may be switched according to the parameter of the upper layer.

Also, the terminal 20 that transmits the CSI of the side link communication may be switched according to the communication type (unicast, group cast, broadcast, etc.).

Also, the terminal 20 that transmits the CSI of the side link communication may be switched according to the type of SSB/PBCH. Alternatively, the terminal 20 that transmits the CSI of the side link communication may be switched according to the type of the measurement target signal (CSI-RS or the like). For example, when notifying the CSI of the side link communication based on the CSI-RS which is periodically transmitted, the method described in Example 3 may be applied. Further, when notifying the CSI of the side link communication based on the CSI-RS transmitted aperiodically, the method described in Example 2 may be applied.

Also, the terminal 20 that transmits the CSI of the side link communication may be switched according to the type of notification of the CSI of the side link communication.

The above-mentioned Examples 1 to 4 can be applied to the semi-persistent CSI notification (SP-CSI reporting). In this case, the scheduling DCI and SCI requesting the CSI notification of the side link communication can be used as the DCI for activation/deactivation of SP-CSI reporting. Here, activation/deactivation of SP-CSI reporting can be performed by a specific combination of DCIs scrambled by a dedicated RadTI (dedicated Radio Network Temporary Identifier). The scheduling DCI and SCI requesting the CSI notification of the side link communication may be replaced with the MAC-CE activation/deactivation of the SP-CSI notification.

In Examples 1 to 4 described above, the example in which the terminal 20 notifies the CSI of the side link communication has been described. Here, when the terminal 20 notifies the CSI of the side link communication, the terminal 20 notifies the time and/or frequency resource for notifying the CSI of the side link communication and the CSI of the other side link communication. And/or frequency resources for reporting or CSI on the Uu interface (the interface between the base station 10 and the terminal 20) may compete (collide) with each other. In the following example, an operation example in the terminal 20 when the notification of the CSI of the side link communication and the notification of the CSI of the other side link communication or the notification of the CSI of the Uu interface collide will be described.

(Example 5-1)
In the terminal 20, when the time and/or frequency resource for notifying the CSI of the side link communication and the time and/or frequency resource for notifying the CSI in the Uu interface compete (collide), for example, The terminal 20 may preferentially notify the CSI of the Uu interface and may not notify the CSI of the side link communication.

(Example 5-2)
In the terminal 20, when the time and/or frequency resource for notifying the CSI of the side link communication and the time and/or frequency resource for notifying the CSI in the Uu interface compete (collide), for example, The terminal 20 may preferentially notify the CSI of the side link communication and may not notify the CSI of the Uu interface.

(Example 5-3)
In the terminal 20, when the time and/or frequency resource for notifying the CSI of the side link communication and the time and/or frequency resource for notifying the CSI in the Uu interface compete (collide), for example, The terminal 20 may multiplex and notify the CSI of the side link communication and the CSI of the Uu interface. In this case, for example, in order of aperiodic CSI notification, semi-persistent CSI notification via PUSCH, semi-persistent CSI notification via PUCCH, and periodic CSI notification, By prioritizing the aperiodic CSI notification to have the highest priority and the periodic CSI notification to have the lowest priority, the CSI notification with the higher priority is prioritized. Alternatively, the notification of the CSI having a lower priority may be omitted. However, when the multi-CSI PUCCH resource is configured, instead of not performing semi-persistent CSI notification and periodic CSI notification via PUCCH, semi-persistency via PUCCH is not used. Stent CSI and periodic CSI may be multiplexed to notify of these CSIs.

(Example 5-4)
In the terminal 20, when the time and/or frequency resource for notifying the CSI of the side link communication and the time and/or frequency resource for notifying the CSI in the Uu interface compete (collide), for example, The terminal 20 may preferentially notify the CSI having the higher priority and not notify the CSI having the lower priority, based on the priority associated with the type of the CSI notification. Here, for example, CSI notification in the aperiodic Uu interface, CSI notification in the aperiodic side link communication, CSI notification in the semi-persistent Uu interface via PUSCH, and semi-transmission via PUSCH. CSI notification of persistent sidelink communication, CSI notification in semi-persistent Uu interface via PUCCH, CSI notification of semi-persistent sidelink communication via PUCCH, in periodic Uu interface In the order of the CSI notification and the CSI notification of the periodic side link communication, the priority of the CSI notification of the aperiodic Uu interface becomes highest, and the priority of the CSI notification of the periodic side link communication becomes Prioritization may be done to be the lowest.

(Example 5-5)
For example, which of the above-mentioned conflict resolution methods of Example 5-1 to Example 5-4 is to be applied may be preset in the terminal 20 by the parameter of the upper layer. Then, in the terminal 20, when the time and/or frequency resource for notifying the CSI of the side link communication and the time and/or frequency resource for notifying the CSI in the Uu interface compete (collide). In, the terminal 20 may apply a preset conflict resolution method.

(Example 5-6)
In the terminal 20, when the time and/or frequency resource for notifying the CSI of the side link communication and the time and/or frequency resource for notifying the CSI in the Uu interface compete (collide), for example, The terminal 20 may notify a plurality of CSIs by simultaneous transmission via different PUCCHs and PUSCHs.

(Example 5-7)
In the terminal 20, it is set that the time and/or frequency resource for notifying the CSI of the side link communication does not conflict with the time and/or frequency resource for notifying the CSI in the Uu interface, and the side link communication is performed. If the time and/or frequency resource for notifying the CSI and the time and/or frequency resource for notifying the CSI in the Uu interface compete with each other, even if the terminal 20 performs the processing, Good. That is, at the stage of performing scheduling, the time and/or frequency resource for notifying CSI of the side link communication and the time and/or frequency resource for notifying CSI in the Uu interface are set so as not to conflict with each other. Good.

(Example 6-1)
In the terminal 20, when the time and/or frequency resource for notifying the CSI of the side link communication and the time and/or frequency resource for notifying the CSI of the other side link communication compete (collide) with each other. For example, the terminal 20 may multiplex and notify the CSI of the side link communication and the CSI of another side link communication.

(Example 6-2)
In the terminal 20, when the time and/or frequency resource for notifying the CSI of the side link communication and the time and/or frequency resource for notifying the CSI of the other side link communication compete (collide) with each other. For example, the terminal 20 notifies the CSI of the high priority based on the priority set for the CSI of the side link communication and the CSI of the other side link communication, and notifies the CSI of the low priority. You do not have to notify.

(Example 6-3)
In the terminal 20, when the time and/or frequency resource for notifying the CSI of the side link communication and the time and/or frequency resource for notifying the CSI of the other side link communication compete (collide) with each other. For example, the terminal 20 may notify CSI of a plurality of side link communications by simultaneous transmission via a plurality of different PUCCHs and PUSCHs.

Note that, in the above-mentioned Examples 1, 2, and 3, the base station 10 may be replaced with the terminal 20 having the scheduling function.

Below, we will consider the side-link communication channels used for channel state information (CSI) feedback. Currently, at least Physical Sidelink Control Channel (PSCCH), Physical Sidelink Shared Channel (PSSCH), and Physical SidelinkFeedChainFeedlink are available as sidelink communication channels that can be used for CSI feedback.

(Method A)
As the method A, an example of a method of notifying the CSI of the side link communication using, for example, the side link control channel will be described below. In this example, the terminal 20 transmits the CSI of the side link communication to another terminal 20 via the control channel of the side link. However, the channel for notifying the CSI of the side link communication is not limited to the side link control channel.

(Method A-1)
The terminal 20 on the transmitting side may apply the Sidelink Control Information (SCI) format and transmit the CSI of the side link communication to another terminal 20 via the PSCCH. The SCI format may include a field for describing the CSI of the side link communication. In this case, the terminal 20 on the receiving side can acquire the CSI of the side link communication with only one PSCCH decoding.

(Method A-2)
As a method of notifying SCI, a two-step SCI notifying method (2-stage SCI) may be applied. In the two-step SCI notification method, for example, the terminal 20 on the transmission side divides the SCI into two parts, a first SCI and a second SCI, and transmits the divided parts. The terminal 20 on the receiving side detects the first SCI by blind decoding. The terminal 20 on the receiving side detects the first SCI by blind decoding, and decodes the second SCI based on the detected first SCI. When this two-step SCI notification method is applied, the CSI of the side link communication may be included in the second SCI part. In this case, the part of the first SCI may be shared by a plurality of SCI formats. According to this configuration, even when a plurality of SCI formats are introduced, the number of times of blind decoding by the terminal 20 on the receiving side can be set to one.

(Method A-3)
In method A, in addition to PSCCH, when it is possible to notify the CSI of the side link communication by PSFCH and/or PSSCH, the channel used by the terminal 20 on the transmitting side to notify the CSI of the side link communication is: For example, it may be set and/or designated by individual higher layer signaling. For example, in response to the notification of reportingChannel=PSCCH as an upper layer parameter to the terminal 20 on the side that transmits the CSI of the sidelink communication, the terminal 20 changes the CSI of the sidelink communication to PSCCH. You may notify to the terminal 20 of the receiving side via.

Alternatively, in method A, in addition to PSCCH, if the CSI of the side link communication can be notified by PSFCH and/or PSSCH, it is used by the terminal 20 on the transmitting side to notify the CSI of the side link communication. The channel to be used may be set and/or designated according to the transmission mode, for example. For example, when the transmission mode of the terminal 20 on the side that transmits the CSI of the sidelink communication is SL transmission mode 2a, the terminal 20 may notify the CSI of the sidelink communication via the PSCCH. When the transmission mode of the terminal 20 on the side that transmits the CSI of the side link communication is other than SL transmission mode 2a, the terminal 20 may notify the CSI of the side link communication via a channel other than the PSCCH.

Alternatively, in method A, in addition to PSCCH, if the CSI of the side link communication can be notified by PSFCH and/or PSSCH, it is used by the terminal 20 on the transmitting side to notify the CSI of the side link communication. The channel to be used may be set and/or designated according to, for example, the size of the payload of CSI, the type of CSI (type I/type II), or the amount of CSI notification (reportQuantity). For example, when the reportQuantity, which is a higher-layer parameter related to the CSI notification of the side link communication, is ssb-Index-RSRP or cri-RSRP, the terminal 20 may notify the CSI of the side link communication via the PSCCH. When the reportQuantity, which is a parameter of the upper layer related to the CSI notification of the sidelink communication, is neither ssb-Index-RSRP nor cri-RSRP, the terminal 20 may notify the CSI of the sidelink communication via the PSSCH. ..

As described above, in the method A, in addition to the PSCCH, it is possible to notify the CSI of the side link communication via the PSFCH and/or the PSSCH, so that the transmission side can be notified according to the parameters and/or conditions. The terminal 20 can select the optimum channel for notifying the CSI of the side link communication.

As described above, according to method A, it is possible to avoid multiplexing CSI and HARQ-ACK for side link communication, and thus it is possible to reduce the complexity of PSFCH. Further, according to the method A, it is possible to reduce the PSSCH overhead when there is no side link communication data.

(Device configuration)
Next, a functional configuration example of the base station 10 and the terminal 20 that executes the processing operation described above will be described.

<Base station 10>
FIG. 13 is a diagram showing an example of the functional configuration of the base station 10. As shown in FIG. 13, the base station 10 includes a transmission unit 101, a reception unit 102, a setting information management unit 103, and a control unit 104. The functional configuration shown in FIG. 13 is merely an example. As long as the operation according to the present embodiment can be executed, the function classification and the names of the function units may be any names. The transmitter 101 may be referred to as a transmitter and the receiver 102 may be referred to as a receiver.

The transmitting unit 101 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal. The receiving unit 102 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signals. Further, the receiving unit 102 includes a function of measuring a received signal and acquiring a quality value.

The preset information management unit 103 stores preset preset information, preset information received from the terminal 20, and the like. 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. 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.

For example, the receiving unit 102 receives a signal including CSI from the terminal 20. The control unit 104 may schedule the PSFCH and/or the PSSCH in the terminal 20 based on the CSI received from the terminal 20. The control unit 104 creates information indicating the determined scheduling, and the transmission unit 101 transmits a signal including the created information to the terminal 20.

<Terminal 20>
FIG. 14 is a diagram showing an example of the functional configuration of the terminal 20. As shown in FIG. 14, the terminal 20 includes a transmission unit 201, a reception unit 202, a setting information management unit 203, and a control unit 204. The functional configuration shown in FIG. 14 is merely an example. As long as the operation according to the present embodiment can be executed, the function classification and the names of the function units may be any names. The transmitter 201 may be called a transmitter and the receiver 202 may be called a receiver. Further, the terminal 20 may be the transmission side terminal 20A or the reception side terminal 20B.

The transmitting unit 201 creates a transmission signal from transmission data and wirelessly transmits the transmission signal. The reception unit 202 wirelessly receives various signals and acquires higher-layer signal from the received physical-layer signal. Further, the receiving unit 202 includes a function of measuring a received signal and acquiring a quality value.

The setting information management unit 203 stores preset setting information, setting information received from the base station 10, and the like. The setting information management unit 203 may store the CSI request (measurement configuration) received from the base station 10 or another terminal 20 via the receiving unit 202. 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 terminal 20. 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.

For example, the control unit 204, based on the CSI request (measurement configuration) received by the receiving unit 202 from the base station 10 or the other terminal 20, transmits a signal (SS/PBCH) to the receiving unit 202 from the other terminal 20. Block, CSI-RS, etc.), channel state information (CSI) is derived based on the measurement result, and the derived CSI may be transmitted to the transmission unit 201.

<Hardware configuration>
The block diagrams (FIGS. 13 to 14) used in the description of the above-described embodiment show blocks of functional units. These functional blocks (components) are realized by an arbitrary combination of at least one of hardware and software. The method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device physically or logically coupled, or directly or indirectly (for example, two or more devices physically or logically separated). , Wired, wireless, etc.) and may be implemented using these multiple devices. The functional blocks may be realized by combining the one device or the plurality of devices with software. Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, observation, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but not limited to these. I can't. For example, a functional block (structural unit) that causes transmission to function is called a transmitting unit or a transmitter. In any case, as described above, the implementation method is not particularly limited.

Further, for example, both the terminal 20 and the base station 10 according to the embodiment of the present invention may function as a computer that performs the processing according to the present embodiment. FIG. 15 is a diagram showing an example of a hardware configuration of terminal 20 and base station 10 according to the present embodiment. The terminal 20 and the base station 10 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. ..

Note that in the following description, the word "device" can be read as a circuit, device, unit, or the like. The hardware configurations of the terminal 20 and the base station 10 may be configured to include one or a plurality of each of the devices 1001 to 1006 shown in the figure, or may be configured without including some devices. Good.

Each function in the terminal 20 and the base station 10 causes a predetermined software (program) to be loaded on hardware such as the processor 1001 and the memory 1002 so that the processor 1001 performs an operation and controls communication by the communication device 1004. It is realized by controlling at least one of reading and writing of data in the memory 1002 and the storage 1003.

The processor 1001 operates an operating system to control the entire computer, for example. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, a calculation device, a register, and the like. For example, the setting information management unit 103, the control unit 104, and the like described above may be realized by the processor 1001.

Also, the processor 1001 reads a program (program code), software module, data, and the like from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least part of the operations described in the above-described embodiments is used. For example, the control unit 204 of the terminal 20 may be implemented by a control program stored in the memory 1002 and operating in the processor 1001, and may be implemented similarly for other functional blocks. Although it has been described that the various processes described above are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The program may be transmitted from the network via an electric communication line.

The memory 1002 is a computer-readable recording medium, and is configured by, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be done. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code) that can be executed to implement the wireless communication method according to the embodiment of the present disclosure, a software module, and the like.

The storage 1003 is a computer-readable recording medium, for example, an optical disc such as a CD-ROM (Compact Disc ROM), a hard disc drive, a flexible disc, a magneto-optical disc (for example, a compact disc, a digital versatile disc, a Blu-ray disc). At least one of a (registered trademark) disk, a smart card, a flash memory (for example, a card, a stick, and a key drive), a floppy (registered trademark) disk, a magnetic strip, or the like. The storage 1003 may be called an auxiliary storage device. The storage medium described above may be, for example, a database including at least one of the memory 1002 and the storage 1003, a server, or another appropriate medium.

The communication device 1004 is hardware (transmission/reception device) for performing communication between computers via at least one of a wired network and a wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of a frequency division duplex (FDD: Frequency Division Duplex) and a time division duplex (TDD: Time Division Duplex). May be composed of For example, the transmitting unit 101, the receiving unit 102, and the like described above may be realized by the communication device 1004.

The input device 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.

In addition, the terminal 20 and the base station 10 each have a 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). It may be configured to include hardware, and the hardware may implement some or all of the functional blocks. For example, the processor 1001 may be implemented using at least one of these hardware.

(Summary of Embodiments)
The present specification discloses at least the following terminals and channel state information measurement methods.

A controller for deriving sidelink channel state information and including the derived sidelink channel state information in a designated field of a sidelink control information format; and the sidelink of the format (having the format). And a transmission unit that transmits control information via a side link channel designated by the control unit.

According to the above configuration, for example, when the control unit specifies the PSCCH as a channel used to notify the CSI of the side link communication, the CSI of the side link communication and the HARQ-ACK are multiplexed. Therefore, it is possible to reduce the complexity of PSFCH. Further, according to the method A, it is possible to reduce the PSSCH overhead when there is no side link communication data. In addition, the terminal can acquire the CSI of the side link communication by only one PSCCH decoding.

The control unit divides the sidelink control information into first sidelink control information and second sidelink control information, and converts the derived sidelink channel state information into the second sidelink control information. May be included. According to this configuration, the terminal on the receiving side can detect the first sidelink control information by blind decoding, and based on the detected first sidelink control information, the second sidelink control information can be detected. It becomes possible to decrypt the information.

The first format of the first side link control information may be a common format among multiple side link control information formats. According to this configuration, even when a plurality of SCI formats are introduced, the number of times of blind decoding by the terminal on the receiving side can be once.

The control unit is based on at least one of individual upper layer signaling (dedicated higher layer signaling), transmission mode of the terminal, size of side link channel state information, and type of side link channel state information. , The side link channel may be selected. According to this configuration, the terminal can select the optimum channel for notifying the CSI of the side link communication according to the parameter and/or the condition.

Deriving sidelink channel state information and including the derived sidelink channel state information in a designated field of a sidelink control information format; and the sidelink control information in the format is designated. Transmitting via a side-link channel.

According to the above configuration, for example, when the control unit specifies the PSCCH as a channel used to notify the CSI of the side link communication, the CSI of the side link communication and the HARQ-ACK are multiplexed. Therefore, it is possible to reduce the complexity of PSFCH. Further, according to the method A, it is possible to reduce the PSSCH overhead when there is no side link communication data. In addition, the terminal can acquire the CSI of the side link communication by only one PSCCH decoding.

(Supplement to Embodiment)
Although the embodiment of the present invention has been described above, the disclosed invention is not limited to such an embodiment, and those skilled in the art can understand various modifications, modifications, alternatives, and substitutions. Ah Although specific numerical values are used for the purpose of facilitating the understanding of the invention, unless otherwise specified, those numerical values are merely examples and any appropriate values may be used. The division of items in the above description is not essential to the present invention, items described in two or more items may be used in combination as necessary, and items described in one item may be different items. It may apply to the matters described in (as long as there is no conflict). The boundaries of the functional units or processing units in the functional block diagram do not always correspond to the boundaries of physical parts. The operation of the plurality of functional units may be physically performed by one component, or the operation of one functional unit may be physically performed by the plurality of components. Regarding the processing procedures described in the embodiments, the order of processing may be changed as long as there is no contradiction. Although the terminal 20 and the base station 10 have been described using functional block diagrams for convenience of description of the process, such a device may be realized by hardware, software, or a combination thereof. The software operated by the processor included in the terminal 20 according to the embodiment of the present invention and the software operated by the processor included in the base station 10 according to the embodiment of the present invention are random access memory (RAM), flash memory, and read-only memory, respectively. (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server, or any other suitable storage medium.

The notification of information is not limited to the aspect/embodiment described in the present disclosure, and may be performed using another method. For example, information is notified by physical layer signaling (eg, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (eg, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, Notification information (MIB (Master Information Block), SIB (System Information Block))), other signals, or a combination thereof may be used. Further, the RRC signaling may be called an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.

Each aspect/embodiment described in the present disclosure is LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system). system), FRA (Future Radio Access), NR (new Radio), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark) )), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), a system using other appropriate systems, and an extension based on these. It may be applied to at least one of the next-generation systems. Further, a plurality of systems may be combined and applied (for example, a combination of at least one of LTE and LTE-A and 5G).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps in a sample order, and are not limited to the specific order presented.

The specific operation that is performed by the base station 10 in the present disclosure may be performed by its upper node in some cases. In a network including one or a plurality of network nodes having the base station 10, various operations performed for communication with a terminal include the base station 10 and other network nodes other than the base station 10 (for example, , MME or S-GW, etc., but is not limited to these). The case where there is one network node other than the base station 10 has been described above, but a combination of a plurality of other network nodes (for example, MME and S-GW) may be used.

Information that has been input and output may be stored in a specific location (for example, memory), or may be managed using a management table. Information that is input/output may be overwritten, updated, or added. The output information and the like may be deleted. The input information and the like may be transmitted to another device.

The determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a boolean value (Boolean: true or false), and may be performed by comparing numerical values (for example, a predetermined value). (Comparison with a value).

Each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be switched according to execution. Further, the notification of the predetermined information (for example, the notification of “being X”) is not limited to the explicit notification, and is performed implicitly (for example, the notification of the predetermined information is not performed). Good.

Software, whether called software, firmware, middleware, microcode, hardware description language, or any other name, instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules. , Application, software application, software package, routine, subroutine, object, executable, thread of execution, procedure, function, etc. should be construed broadly.

Also, software, instructions, information, etc. may be sent and received via a transmission medium. For example, the software uses a website using at least one of wired technology (coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.), When sent from a server, or other remote source, at least one of these wired and wireless technologies are included within the definition of transmission medium.

The information, signals, etc. described in this disclosure may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description include voltage, current, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or any of these. May be represented by a combination of

Note that the terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and the symbol may be a signal (signaling). The signal may also be a message. Moreover, a component carrier (CC:Component Carrier) may be called a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably. Further, the information, parameters, etc. described in the present disclosure may be represented by using an absolute value, may be represented by using a relative value from a predetermined value, or by using other corresponding information. May be represented. For example, the radio resources may be those indicated by the index.

-The names used for the above parameters are not limited in any way. Further, the mathematical formulas and the like using these parameters may differ from those explicitly disclosed in the present disclosure. Since different channels (eg PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the different names assigned to these different channels and information elements are in no way limited names. is not.

In the present disclosure, "base station (BS: Base Station)", "radio base station", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", " "Access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", "cell group", " The terms "carrier", "component carrier" and the like may be used interchangeably. A base station may be referred to by terms such as macro cell, small cell, femto cell, and pico cell.

A base station can accommodate one or more (eg, three) cells. When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (RRH: Communication service can also be provided by Remote Radio Head.The term "cell" or "sector" means a part or the whole of the coverage area of at least one of the base station and the base station subsystem that perform communication service in this coverage. Refers to.

In the present disclosure, terms such as “mobile station (MS: Mobile Station)”, “user terminal”, “user device (UE: User Equipment)”, and “terminal” may be used interchangeably. ..

Mobile stations are defined by those skilled in the art 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. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and the mobile station may be called a transmission device, a reception device, a communication device, or the like. Note that at least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like. The moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ). At least one of the base station and the mobile station also includes a device that does not necessarily move during a communication operation. 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.

Also, the base station in the present disclosure may be replaced by the user terminal. For example, the communication between the base station and the user terminal is replaced with communication between a plurality of user terminals (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything) may be called). Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the user terminal 20 may have the function of the base station 10 described above. In addition, the wording such as “up” and “down” may be replaced with the wording corresponding to the terminal-to-terminal communication (for example, “side”). For example, the uplink channel and the downlink channel may be replaced with the side channel.

Similarly, the user terminal in the present disclosure may be replaced by the base station. In this case, the base station 10 may have the function of the user terminal 20 described above.

The terms "connected," "coupled," or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, and It may include the presence of one or more intermediate elements between two elements that are “connected” or “coupled”. The connections or connections between the elements may be physical, logical, or a combination thereof. For example, “connection” may be read as “access”. As used in this disclosure, two elements are in the radio frequency domain, with at least one of one or more wires, cables and printed electrical connections, and as some non-limiting and non-exhaustive examples. , Can be considered to be “connected” or “coupled” to each other, such as with electromagnetic energy having wavelengths in the microwave and light (both visible and invisible) regions.

The reference signal may be abbreviated as RS (Reference Signal), or may be referred to as Pilot depending on the applied standard.

As used in this disclosure, the phrase “based on” does not mean “based only on,” unless expressly specified otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

Where the use of "include", "including" and variations thereof in this disclosure, these terms are inclusive, as is the term "comprising." Is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive or.

In the present disclosure, where translations add articles, such as a, an, and the in English, the present disclosure may include that the noun that follows these articles is plural.

In the present disclosure, the term “A and B are different” may mean “A and B are different from each other”. The term may mean that “A and B are different from C”. The terms "remove", "coupled" and the like may be construed similarly as "different".

Although the present invention has been described in detail above, it is obvious 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 modified and changed modes without departing from the spirit and scope of the present invention defined by the description of the claims. Therefore, the description of the present specification is for the purpose of exemplifying explanation, and does not have any restrictive meaning to the present invention.

This international patent application claims its priority based on Japanese Patent Application No. 2019-010692 filed on January 24, 2019, and the entire content of Japanese Patent Application No. 2019-010692 is applied to the present application. Incorporate.

10 base station 101 transmitter 102 receiver 103 setting information manager 104 controller 20 terminal 201 transmitter 202 receiver 203 setting information manager 204 controller 1001 processor 1002 memory 1003 storage 1004 communication device 1005 input device 1006 output device

Claims (5)

1. A controller for deriving sidelink channel state information and including the derived sidelink channel state information in a designated field of the sidelink control information format;
   And a transmitter that transmits the sidelink control information in the format via a sidelink channel designated by the controller.
2. The control unit divides the sidelink control information into first sidelink control information and second sidelink control information, and converts the derived sidelink channel state information into the second sidelink control information. include,
   The terminal according to claim 1.
3. The first format of the first side link control information is a common format among a plurality of formats of side link control information,
   The terminal according to claim 2.
4. The control unit, based on at least one of individual upper layer signaling, the transmission mode of the terminal, the size of the side link channel state information, and the type of the side link channel state information, the side link channel The terminal according to claim 1, wherein
5. Deriving sidelink channel state information and including the derived sidelink channel state information in a designated field of a sidelink control information format;
   Transmitting the sidelink control information in the format via a channel of a designated sidelink.

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