阅读说明：本技术 Sl csi报告 (SL CSI reporting ) 是由 李承旻 徐翰瞥 李英大 朴基源 李钟律 于 2020-03-19 设计创作，主要内容包括：根据本公开的一个实施方式,提供了一种第一设备执行SL通信的方法。该方法可以包括以下步骤：在MAC层中生成MAC CE形式的与所述第一设备和第二设备之间的信道状态相关的SL CSI；向基站发送基于具有MAC CE形式的SL CSI触发的第一SR；从基站接收SL许可；以及在与SL许可相关的SL资源上向第二设备发送SLCSI。(According to one embodiment of the present disclosure, a method of a first device performing SL communication is provided. The method may comprise the steps of: generating SL CSI in the form of MAC CE related to a channel state between the first device and the second device in a MAC layer; transmitting a first SR triggered based on SL CSI in a MAC CE form to a base station; receiving a SL grant from a base station; and transmitting the SLCSI to the second device on the SL resource associated with the SL grant.)

1. A method of performing sidelink SL communication by a first device, the method comprising the steps of:

generating SL Channel State Information (CSI) related to a channel state between the first device and the second device in a media access Control (CE) format by a MAC layer;

transmitting a first Scheduling Request (SR) to a base station, the first SR being triggered based on the SL CSI in the MAC CE format;

receiving a SL grant from the base station; and

transmitting the SL CSI to the second device on SL resources associated with the SL grant.

2. The method of claim 1, wherein the generation of the SL CSI and the transmission of the SL CSI to the second device is triggered by physical PHY layer signaling related to a reporting trigger of the SL CSI.

3. The method of claim 1, wherein the transmission of the first SR is triggered by PHY layer signaling related to a reporting trigger of the SL CSI.

4. The method of claim 3, wherein the SL CSI-related Buffer Status Report (BSR) triggering the transmission of the first SR is undefined, and

wherein the transmission of the first SR is not triggered by the BSR.

5. The method of claim 1, wherein a first SR configuration for the first SR and a second SR configuration for a second SR triggered based on a Buffer Status Report (BSR) are different, and

the BSR related to the second SR configuration is related to at least one of SL data or UL data that is not related to SL CSI of the MAC CE format.

6. The method of claim 1, wherein the SL grant relates to the first SR transmitted to the base station.

7. The method of claim 1, further comprising the steps of:

transmitting a third SR to the base station;

receiving an UL grant from the base station; and

transmitting the SL CSI to the base station on UL resources related to the UL grant.

8. The method of claim 7, wherein the SL CSI is transmitted to the base station on the UL resources through the MAC CE.

9. The method of claim 7, wherein the UL grant is related to the third SR.

10. The method of claim 1, wherein the SL CSI comprises at least one of a channel quality indicator, CQI, a precoding matrix indicator, PMI, and a rank indicator, RI.

11. The method of claim 8, wherein the SL CSI is sent to the base station based on at least one of the SL resource being reselected, a SL channel busy rate CBR value increasing compared to a predetermined threshold, a reference signal received power RSRP value increasing compared to a predetermined threshold, the RSRP value increasing compared to a predetermined threshold, a received signal strength indicator RSSI value increasing compared to a predetermined threshold, a SL CQI value increasing compared to a predetermined threshold, a SL PMI value increasing compared to a predetermined threshold, a SL RI value increasing compared to a predetermined threshold, and a PC5 RRC connection being established between user equipments, UEs.

12. The method of claim 1, wherein transmitting the SL CSI to the second device comprises:

determining SL resources for transmitting the SL CSI to the second device based on the resource selection; and

transmitting the SL CSI to the second device through the MAC CE based on the SL resources.

13. The method of claim 1, wherein the SL CSI is transmitted to the second device through the MAC CE.

14. A first device that performs SL communication, the first device comprising:

at least one memory storing instructions;

at least one transceiver; and

at least one processor coupled to the at least one memory and the at least one transceiver,

wherein the at least one processor is configured to:

generating SL Channel State Information (CSI) related to a channel state between the first device and the second device in a media access Control (CE) format by a MAC layer;

control the at least one transceiver to transmit a first scheduling request, SR, to a base station, the first SR being triggered based on the SL CSI in the MAC CE format,

controlling the at least one transceiver to receive SL grants from the base station, an

Control the at least one transceiver to transmit the SL CSI to the second device on SL resources associated with the SL grant.

15. An apparatus configured to control a first terminal, the apparatus comprising:

at least one processor; and

at least one computer memory operatively connectable to the at least one processor and storing instructions,

wherein the at least one processor executes the instructions to control the first terminal to:

generating SL Channel State Information (CSI) related to a channel state between the first device and the second device in a media access Control (CE) format by a MAC layer;

transmitting a first Scheduling Request (SR) to a base station, the first SR being triggered based on the SL CSI in the MAC CE format;

receiving a SL grant from the base station; and

transmitting the SL CSI to the second device on SL resources associated with the SL grant.

16. A non-transitory computer-readable storage medium having instructions stored thereon, which when executed by at least one processor cause a first device to:

generating SL Channel State Information (CSI) related to a channel state between the first device and the second device in a media access Control (CE) format by a MAC layer;

transmitting a first Scheduling Request (SR) to a base station, the first SR being triggered based on the SL CSI in the MAC CE format;

receiving a SL grant from the base station; and

transmitting the SL CSI to the second device on SL resources associated with the SL grant.

17. A method of performing SL communication by a second device, the method comprising:

receiving SL CSI related to a channel state between a first device and the second device,

wherein the SLCSI generated in a MAC CE format in a Medium Access Control (MAC) layer of the first device triggers a Scheduling Request (SR) of the first device, and

wherein the SL CSI is received on SL resources associated with a SL grant received by the first device from a base station.

18. The method of claim 17, wherein the generation of the SL CSI and the transmission of the SL CSI are triggered by physical PHY layer signaling related to a reporting trigger of the SL CSI.

19. A second device for performing SL communication, the second device comprising:

at least one memory storing instructions;

at least one transceiver; and

at least one processor coupled to the at least one memory and the at least one transceiver,

wherein the at least one processor controls the at least one transceiver to receive SL CSI related to a channel state between a first device and the second device,

wherein the SL CSI generated in a MAC CE format in a Medium Access Control (MAC) layer of the first device triggers a Scheduling Request (SR) of the first device, and

wherein the SL CSI is received on SL resources associated with a SL grant received by the first device from a base station.

20. The second device of claim 19, wherein the generation of the SL CSI and the transmission of the SL CSI are triggered by physical PHY layer signaling related to a reporting trigger of the SL CSI.

Technical Field

The present disclosure relates to wireless communication systems.

Background

Sidelink (SL) communication is a communication scheme in which a direct link is established between User Equipments (UEs) and the UEs exchange voice and data directly with each other without the intervention of an evolved node b (enb). SL communication is being considered as a solution to eNB overhead due to rapid growth of data traffic.

V2X (vehicle to all) refers to a communication technology that a vehicle uses to exchange information with other vehicles, pedestrians, and objects equipped with infrastructure, etc. V2X can be divided into four types such as V2V (vehicle-to-vehicle), V2I (vehicle-to-infrastructure), V2N (vehicle-to-network), and V2P (vehicle-to-pedestrian). V2X communication may be provided through a PC5 interface and/or a Uu interface.

As more and more communication devices require greater communication capacity, enhanced mobile broadband communications relative to conventional Radio Access Technologies (RATs) are required. Therefore, communication system design considering reliability and delay sensitive UEs or services has also been discussed, and the next generation radio access technology considering enhanced mobile broadband communication, massive MTC, and ultra-reliable low-delay communication (URLLC) may be referred to as a new RAT (radio access technology) or NR (new radio).

Fig. 1 is a diagram for describing NR-based V2X communication compared to NR-previously used RAT-based V2X communication. The embodiment of fig. 1 may be combined with various embodiments of the present disclosure.

Regarding V2X communication, in discussing RATs used before NR, emphasis is placed on a scheme of providing security services based on V2X messages such as BSM (basic security message), CAM (collaboration awareness message), and DENM (decentralized environment notification message). The V2X message may include location information, dynamic information, attribute information, and the like. For example, a UE may send a periodic message type CAM and/or an event triggered message type DENM to another UE.

For example, the CAM may include dynamic state information of the vehicle such as direction and speed, static data of the vehicle such as size, and basic vehicle information such as external lighting state, route details, and the like. For example, the UE may broadcast the CAM, and the latency of the CAM may be less than 100 ms. For example, a UE may generate DENM and send it to another UE in an unexpected situation such as a vehicle failure, accident, etc. For example, all vehicles within transmission range of the UE can receive the CAM and/or DENM. In this case, DENM may be higher priority than CAM.

Thereafter, with respect to V2X communication, various V2X scenarios are proposed in NR. For example, the various V2X scenarios may include vehicle formation, advanced driving, extended sensors, remote driving, and the like.

For example, based on vehicle formation, vehicles may move together by dynamically forming groups. For example, to perform a formation operation based on vehicle formation, vehicles belonging to the group may receive periodic data from a leading vehicle. For example, vehicles belonging to the group may decrease or increase the interval between vehicles by using the periodic data.

For example, the vehicle may be semi-automatic or fully automatic based on advanced driving. For example, each vehicle may adjust the trajectory or maneuver based on data obtained from local sensors of nearby vehicles and/or nearby logical entities. In addition, for example, each vehicle may share driving intent with nearby vehicles.

For example, based on the extended sensors, raw data, processed data, or real-time video data obtained through local sensors may be exchanged between vehicles, logical entities, pedestrians' UEs, and/or V2X application servers. Therefore, for example, the vehicle can recognize a further improved environment compared to an environment detected using a self sensor.

For example, based on remote driving, a remote driver or V2X application may operate or control a remote vehicle in a hazardous environment or an undriven person. For example, if the route is predictable as in public transportation, cloud-computing based driving may be used for operation or control of the remote vehicle. Additionally, for example, access to a cloud-based backend service platform may be considered for remote driving.

Further, schemes for specifying service requirements for various V2X scenarios such as vehicle formation, advanced driving, extended sensors, remote driving, etc. are discussed in NR-based V2X communication.

Disclosure of Invention

Technical problem

The present disclosure provides a Sidelink (SL) communication method between devices (or UEs) based on vehicle-to-all (V2X) communication and a device (or UE) performing the same.

The present disclosure also provides a method and apparatus for performing Long Term Evolution (LTE) SL communication between devices based on V2X communication in a wireless communication system.

The present disclosure also provides a method and apparatus for triggering an SR process of a MAC layer of a UE based on SL CSI generated in a PHY layer of the UE.

Technical scheme

According to an embodiment of the present disclosure, a method of performing Sidelink (SL) communication by a first device may be provided. The method may comprise the steps of: generating, by a Medium Access Control (MAC) layer, SL Channel State Information (CSI) related to a channel state between a first device and a second device in a MAC Control Element (CE) format; transmitting a first Scheduling Request (SR) to a base station, the first SR being triggered based on SL CSI in a MAC CE format; receiving a SL grant from a base station; and transmitting the SL CSI to the second device on SL resources associated with the SL grant.

According to an embodiment of the present disclosure, a first device for performing SL communication may be provided. The first device may include at least one memory storing instructions, at least one transceiver, and at least one processor coupled to the at least one memory and the at least one transceiver. The at least one processor may be configured to: generating, by a Medium Access Control (MAC) layer, SL Channel State Information (CSI) related to a channel state between a first device and a second device in a MAC Control Element (CE) format; controlling at least one transceiver to transmit a first Scheduling Request (SR) to a base station, the first SR being triggered based on SL CSI in a MAC CE format; the at least one transceiver is controlled to receive a SL grant from the base station and to transmit SL CSI to the second device on SL resources associated with the SL grant.

According to an embodiment of the present disclosure, a device (or chip (set)) configured to control a first terminal may be provided. The apparatus may include at least one processor and at least one computer memory operatively connectable to the at least one processor and storing instructions. The at least one processor may execute instructions to control the first terminal to: generating, by a Medium Access Control (MAC) layer, SL Channel State Information (CSI) related to a channel state between the first device and a second device in a MAC Control Element (CE) format; transmitting a first Scheduling Request (SR) to a base station, the first SR being triggered based on SL CSI in a MAC CE format; receiving a SL grant from a base station; and transmitting the SL CSI to the second device on SL resources related to the SL grant.

According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium having instructions (or directions) stored thereon may be provided. The instructions, when executed by the at least one processor, cause the first device to: generating, by a Medium Access Control (MAC) layer, SL Channel State Information (CSI) related to a channel state between the first device and a second device in a MAC Control Element (CE) format; transmitting a first Scheduling Request (SR) to a base station, the first SR being triggered based on SL CSI in a MAC CE format; receiving a SL grant from a base station; and transmitting the SL CSI to the second device on SL resources related to the SL grant.

According to an embodiment of the present disclosure, there is provided a method of performing SL communication by a second device. The method may comprise the steps of: receiving SL CSI related to a channel state between a first device and a second device, wherein a Scheduling Request (SR) of the first device is triggered by the SL CSI generated in a Media Access Control (MAC) CE format in a MAC CE layer of the first device, and wherein the SL CSI is received on SL resources related to SL grants received by the first device from a base station.

According to an embodiment of the present disclosure, there is provided a second device that performs SL communication. The second device may include at least one memory storing instructions, at least one transceiver, and at least one processor connecting the at least one memory and the at least one transceiver. The at least one processor may control the at least one transceiver to receive the SL CSI related to a channel state between the first device and the second device, wherein a Scheduling Request (SR) of the first device is triggered by the SL CSI generated in a Medium Access Control (MAC) CE format in a MAC CE layer of the first device, and wherein the SL CSI is received on SL resources related to SL grants received by the first device from the base station.

Technical effects

According to the present disclosure, a User Equipment (UE) (or device) may efficiently perform Sidelink (SL) communication.

According to the present disclosure, vehicle-to-all (V2X) communication can be efficiently performed between devices (or UEs).

According to the present disclosure, based on SL CSI generated in a PHY layer of a UE, an SR process of a MAC layer of the UE is triggered, thereby improving efficiency of SL CSI reporting.

Drawings

Fig. 1 is a diagram for describing NR-based V2X communication compared to NR-previously used RAT-based V2X communication.

Fig. 2 shows the structure of an NR system according to an embodiment of the present disclosure.

Fig. 3 illustrates a functional division between the NG-RAN and the 5GC according to an embodiment of the present disclosure.

Fig. 4 illustrates a radio protocol architecture in accordance with an embodiment of the present disclosure.

Fig. 5 shows the structure of an NR system according to an embodiment of the present disclosure.

Fig. 6 illustrates a structure of a slot of an NR frame according to an embodiment of the present disclosure.

Fig. 7 illustrates an example of BWP according to an embodiment of the present disclosure.

Fig. 8 shows a radio protocol architecture for SL communication according to an embodiment of the present disclosure.

Fig. 9 shows a UE performing V2X or SL communication according to an embodiment of the present disclosure.

Fig. 10 illustrates a procedure for performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure.

FIG. 11 illustrates three transmission types according to embodiments of the present disclosure.

Fig. 12 shows an example of physical channels and signaling to which the present disclosure is applied.

Fig. 13 illustrates a process in which a first device transmits SL CSI to a second device based on communication with a BS according to an embodiment of the present disclosure.

Fig. 14 illustrates a process in which a first device transmits SL CSI to a BS or a second device based on communication with the BS according to another embodiment of the present disclosure.

Fig. 15 illustrates a process in which a first device transmits SL CSI to a second device based on resource selection according to an embodiment of the present disclosure.

Fig. 16 is a flow chart illustrating operation of a first device according to an embodiment of the present disclosure.

Fig. 17 is a flowchart illustrating an operation of a second device according to an embodiment of the present disclosure.

Fig. 18 shows a communication system 1 according to an embodiment of the present disclosure.

Fig. 19 illustrates a wireless device according to an embodiment of the present disclosure.

Fig. 20 shows a signal processing circuit for transmitting signals according to an embodiment of the present disclosure.

Fig. 21 illustrates a wireless device in accordance with an embodiment of the present disclosure.

Fig. 22 illustrates a handheld device, in accordance with an embodiment of the present disclosure.

Fig. 23 illustrates an automobile or autonomous vehicle, in accordance with embodiments of the present disclosure.

Detailed Description

In the present specification, "a or B" may mean "a only", "B only", or "both a and B". In other words, in the present specification, "a or B" may be interpreted as "a and/or B". For example, in this specification, "A, B or C" may mean "any combination of a only," B only, "" C only, "or" A, B, C.

Slashes (/) or commas as used in this specification may mean "and/or". For example, "a/B" may mean "a and/or B". Thus, "a/B" may mean "a only," B only, "or" both a and B. For example, "A, B, C" may mean "A, B or C".

In the present specification, "at least one of a and B" may mean "only a", "only B", or "both a and B". In addition, in the present specification, the expression "at least one of a or B" or "at least one of a and/or B" may be interpreted as "at least one of a and B".

In addition, in the present specification, "at least one of A, B and C" may mean "a only", "B only", "C only", or "any combination of A, B and C". Additionally, "A, B or at least one of C" or "A, B and/or at least one of C" may mean "at least one of A, B and C".

In addition, parentheses used in the specification may mean "for example". In particular, when indicated as "control information (PDCCH)", this may mean that "PDCCH" is proposed as an example of "control information". In other words, "control information" in the present specification is not limited to "PDCCH", and "PDDCH" may be proposed as an example of "control information". In particular, when indicated as "control information (i.e., PDCCH)", this may also mean an example in which "PDCCH" is proposed as "control information".

The technical features described independently in one drawing in this specification may be implemented separately or may be implemented simultaneously.

The techniques described below may be used in various wireless communication systems such as Code Division Multiple Access (CDMA), Frequency Division Multiple Access (FDMA), Time Division Multiple Access (TDMA), Orthogonal Frequency Division Multiple Access (OFDMA), single carrier frequency division multiple access (SC-FDMA), and so on. CDMA may be implemented using radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA-2000. TDMA may be implemented using radio technologies such as global system for mobile communications (GSM)/General Packet Radio Service (GPRS)/enhanced data rates for GSM evolution (EDGE). OFDMA may be implemented using radio technologies such as Institute of Electrical and Electronics Engineers (IEEE)802.11(Wi-Fi), IEEE802.16 (WiMAX), IEEE 802.20, evolved UTRA (E-UTRA), and so on. IEEE802.16m is an evolved version of IEEE802.16 e and provides backward compatibility with IEEE802.16 e based systems. UTRA is part of the Universal Mobile Telecommunications System (UMTS). Third generation partnership project (3GPP) Long Term Evolution (LTE) is part of evolved UMTS (E-UMTS) using E-UTRA. 3GPP LTE uses OFDMA in the downlink and SC-FDMA in the uplink. LTE-advanced (LTE-a) is an evolution of LTE.

The 5G NR is a LTE-A follow-up technology corresponding to a novel all-new mobile communication system with the characteristics of high performance, low time delay, high availability and the like. The 5G NR may use resources of all available frequency spectrums including a low frequency band less than 1GHz, a middle frequency band from 1GHz to 10GHz, and a high frequency (millimeter wave) above 24GHz, and the like.

For clarity of description, the following description will focus primarily on LTE-A or 5G NR. However, the technical features according to the embodiments of the present disclosure will not be limited thereto.

Fig. 2 shows the structure of an NR system according to an embodiment of the present disclosure. The embodiment of fig. 2 may be combined with various embodiments of the present disclosure.

Referring to fig. 2, a next generation radio access network (NG-RAN) may include a BS20 providing user plane and control plane protocol terminations towards a UE 10. For example, the BS20 may include a next generation node b (gnb) and/or an evolved node b (enb). For example, the UE 10 may be fixed or mobile and may be referred to by different terms such as Mobile Station (MS), User Terminal (UT), Subscriber Station (SS), Mobile Terminal (MT), wireless device, and so forth. For example, the BS may be referred to as a fixed station communicating with the UE 10 and may be referred to as other terms such as a Base Transceiver System (BTS), an Access Point (AP), and the like.

The embodiment of fig. 2 illustrates the case where only the gNB is included. The BSs 20 may be connected to each other via an Xn interface. The BSs 20 may be connected to each other via a fifth generation (5G) core network (5GC) and an NG interface. More specifically, the BS20 may be connected to an access and mobility management function (AMF)30 via a NG-C interface and may be connected to a User Plane Function (UPF)30 via a NG-U interface.

Fig. 3 illustrates a functional division between the NG-RAN and the 5GC according to an embodiment of the present disclosure.

Referring to fig. 3, the gNB may provide functions such as inter-cell radio resource management (inter-cell RRM), Radio Bearer (RB) control, connection mobility control, radio admission control, measurement configuration and provisioning, dynamic resource allocation, and the like. The AMF may provide functions such as non-access stratum (NAS) security, idle state mobility handling, and the like. The UPF may provide functions such as mobility anchoring, Protocol Data Unit (PDU) processing, and the like. The Session Management Function (SMF) may provide functions such as User Equipment (UE) Internet Protocol (IP) address assignment, PDU session control, and the like.

Radio interface protocol layers between the UE and the network may be classified into a first layer (L1), a second layer (L2), and a third layer (L3) based on the lower three layers of an Open System Interconnection (OSI) model well known in the communication system. Here, a Physical (PHY) layer belonging to the first layer provides an information transfer service using a physical channel, and a Radio Resource Control (RRC) layer belonging to the third layer is used to control radio resources between the UE and the network. For this, the RRC layer exchanges RRC messages between the UE and the BS.

Fig. 4 illustrates a radio protocol architecture in accordance with an embodiment of the present disclosure. The embodiment of fig. 4 may be combined with various embodiments of the present disclosure. Specifically, (a) in fig. 4 shows a radio protocol architecture for a user plane, and (b) in fig. 4 shows a radio protocol architecture for a control plane. The user plane corresponds to a protocol stack for user data transmission, and the control plane corresponds to a protocol stack for control signal transmission.

Referring to fig. 4, a physical layer provides an information transfer service to an upper layer through a physical channel. The physical layer is connected to a Medium Access Control (MAC) layer, which is an upper layer of the physical layer, through a transport channel. Data is transferred between the MAC layer and the physical layer through a transport channel. The transport channels are classified according to how and what characteristics of data are transported over the radio interface.

Between different PHY layers (i.e., a PHY layer of a transmitter and a PHY layer of a receiver), data is transferred through a physical channel. The physical channel may be modulated using an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and uses time and frequency as radio resources.

The MAC layer provides a service to a Radio Link Control (RLC) layer, which is an upper layer of the MAC layer, via a logical channel. The MAC layer provides a function of mapping a plurality of logical channels to a plurality of transport channels. The MAC layer also provides a function of logical channel multiplexing by mapping a plurality of logical channels to a single transport channel. The MAC layer provides a data transmission service through a logical channel.

The RLC layer performs concatenation, segmentation, and reassembly of RLC SDUs. In order to ensure different quality of service (QoS) required for Radio Bearers (RBs), the RLC layer provides three types of operation modes, i.e., a Transparent Mode (TM), an Unacknowledged Mode (UM), and an Acknowledged Mode (AM). The AM RLC provides error correction through automatic repeat request (ARQ).

A Radio Resource Control (RRC) layer is defined only in the control plane. And, the RRC layer performs a function of controlling physical channels, transport channels, and logical channels in relation to configuration, reconfiguration, and release of radio bearers. The RB refers to a logical path provided by first layers (PHY layer) and second layers (MAC layer, RLC layer, and PDCP layer) to transfer data between the UE and the network.

Functions of a Packet Data Convergence Protocol (PDCP) layer in the user plane include transmission of user data, header compression, and ciphering. Functions of the Packet Data Convergence Protocol (PDCP) layer in the control plane include transport and ciphering/integrity protection of control plane data.

The Service Data Adaptation Protocol (SDAP) layer is defined only in the user plane. The SDAP layer performs mapping between quality of service (QoS) flows and Data Radio Bearers (DRBs) and QoS Flow ID (QFI) tagging in both DL and UL packets.

The configuration of the RB refers to a process for specifying a radio protocol layer and channel properties to provide a specific service and for determining corresponding detailed parameters and operations. RBs can be classified into two types, namely, Signaling Radio Bearers (SRBs) and Data Radio Bearers (DRBs). SRBs are used as a path for transmitting RRC messages in the control plane, and DRBs are used as a path for transmitting user data in the user plane.

The UE is in an RRC CONNECTED (RRC _ CONNECTED) state when an RRC connection is established between the RRC layer of the UE and the RRC layer of the E-UTRAN, otherwise the UE may be in an RRC IDLE (RRC _ IDLE) state. In the case of NR, an RRC INACTIVE (RRC _ INACTIVE) state is additionally defined, and a UE in the RRC _ INACTIVE state may maintain a connection with a core network and release its connection with a BS.

Data is transmitted from the network to the UE through a downlink transport channel. Examples of the downlink transport channel include a Broadcast Channel (BCH) for transmitting system information and a downlink Shared Channel (SCH) for transmitting user traffic or control messages. Traffic or control messages of a downlink multicast or broadcast service may be transmitted on the downlink SCH or an additional downlink Multicast Channel (MCH). Data is transmitted from the UE to the network through an uplink transport channel. Examples of the uplink transport channel include a Random Access Channel (RACH) for transmitting an initial control message and an uplink SCH for transmitting user traffic or a control message.

Examples of logical channels belonging to the higher channels of the transport channels and mapped to the transport channels include a broadcast channel (BCCH), a Paging Control Channel (PCCH), a Common Control Channel (CCCH), a Multicast Control Channel (MCCH), a Multicast Traffic Channel (MTCH), and the like.

The physical channel includes a plurality of OFDM symbols in the time domain and a plurality of subcarriers in the frequency domain. One subframe includes a plurality of OFDM symbols in the time domain. A resource block is a resource allocation unit and includes a plurality of OFDM symbols and a plurality of subcarriers. In addition, each subframe may use a specific subcarrier of a specific OFDM symbol (e.g., a first OFDM symbol) of the corresponding subframe for a Physical Downlink Control Channel (PDCCH), i.e., an L1/L2 control channel. A Transmission Time Interval (TTI) is a unit time of subframe transmission.

Fig. 5 shows the structure of an NR system according to an embodiment of the present disclosure. The embodiment of fig. 5 may be combined with various embodiments of the present disclosure.

Referring to fig. 5, in NR, a radio frame may be used to perform uplink and downlink transmission. The radio frame is 10ms in length and may be defined as being made up of two Half Frames (HF). A half frame may include five 1ms Subframes (SFs). A Subframe (SF) may be divided into one or more slots, and the number of slots within the subframe may be determined by subcarrier spacing (SCS). Each slot may include 12 or 14 ofdm (a) symbols according to a Cyclic Prefix (CP).

In case of using the normal CP, each slot may include 14 symbols. In case of using the extended CP, each slot may include 12 symbols. Herein, the symbol may include an OFDM symbol (or CP-OFDM symbol) and a single carrier-FDMA (SC-FDMA) symbol (or discrete fourier transform spread OFDM (DFT-s-OFDM) symbol).

In the following table 1, the number of symbols (N) per slot set (μ) according to SCS in case of adopting the normal CP is exemplified^slot _symb) (ii) a Number of time slots per frame (N)^frame,μ _slot) And the number of slots per subframe (N)^subframe,μ _slot)。

[ Table 1]

SCS(15*2μ)	Nslot symb	Nframe,μ slot	Nsubframe,μ slot
				15KHz(μ＝0)	14	10	1
30KHz(μ＝1)	14	20	2
				60KHz(μ＝2)	14	40	4
120KHz(μ＝3)	14	80	8
				240KHz(μ＝4)	14	160	16

Table 2 shows an example of the number of symbols per slot, the number of slots per frame, and the number of slots per subframe according to SCS in case of using the extended CP.

[ Table 2]

SCS(15*2μ)	Nslot symb	Nframe,μ slot	Nsubframe,μ slot
				60KHz(μ＝2)	12	40	4

In the NR system, an ofdm (a) parameter set (e.g., SCS, CP length, etc.) between cells integrated to one UE may be configured differently. Thus, the (absolute time) duration (or interval) of time resources (e.g., subframes, slots, or TTIs) (collectively referred to as Time Units (TUs) for simplicity) composed of the same number of symbols may be configured differently in the integrated cell. In NR, a plurality of parameter sets or SCS for supporting various 5G services may be supported. For example, with 15kHz SCS, a wide range of legacy cellular bands can be supported, and with 30/60 kHz SCS, dense cities, lower latency, wider carrier bandwidths can be supported. In the case of SCS of 60kHz or higher, a bandwidth of more than 24.25GHz may be used in order to overcome the phase noise.

The NR frequency band may be defined as two different types of frequency ranges. The two different types of frequency ranges may be FR1 and FR 2. The values of the frequency ranges may be changed (or varied), for example, two different types of frequency ranges may be as shown in table 3 below. Among frequency ranges used in the NR system, FR1 may mean a "range lower than 6 GHz", and FR2 may mean a "range higher than 6 GHz", and may also be referred to as millimeter wave (mmW).

[ Table 3]

Frequency range designation	Corresponding frequency range	Subcarrier spacing (SCS)
			FR1	450MHz–6000MHz	15、30、60kHz
FR2	24250MHz–52600MHz	60、120、240kHz

As described above, the value of the frequency range in the NR system may be changed (or varied). For example, as shown in table 4 below, FR1 may include a bandwidth in the range of 410MHz to 7125 MHz. More specifically, FR1 may include frequency bands of 6GHz (or 5850, 5900, 5925MHz, etc.) and higher. For example, bands of 6GHz (or 5850, 5900, 5925MHz, etc.) and higher included in FR1 may include unlicensed bands. The unlicensed frequency band may be used for various purposes, for example, the unlicensed frequency band is used for vehicle-specific communication (e.g., autonomous driving).

[ Table 4]

Frequency range designation	Corresponding frequency range	Subcarrier spacing (SCS)
			FR1	410MHz–7125MHz	15、30、60kHz
FR2	24250MHz–52600MHz	60、120、240kHz

Fig. 6 illustrates a structure of a slot of an NR frame according to an embodiment of the present disclosure. Referring to fig. 6, a slot includes a plurality of symbols in the time domain. For example, in case of a normal CP, one slot may include 14 symbols. However, in case of the extended CP, one slot may include 12 symbols. Alternatively, in case of a normal CP, one slot may include 7 symbols. However, in case of the extended CP, one slot may include 6 symbols.

The carrier includes a plurality of subcarriers in the frequency domain. A Resource Block (RB) may be defined as a plurality of consecutive subcarriers (e.g., 12 subcarriers) in the frequency domain. A bandwidth part (BWP) may be defined as a plurality of consecutive (physical) resource blocks ((P) RBs) in a frequency domain, and the BWP may correspond to one parameter set (e.g., SCS, CP length, etc.). The carrier may include up to N BWPs (e.g., 5 BWPs). Data communication may be performed via active BWP. Each element may be referred to as a Resource Element (RE) in the resource grid, and one complex symbol may be mapped to each element.

Further, a radio interface between the UE and another UE or a radio interface between the UE and a network may include an L1 layer, an L2 layer, and an L3 layer. In various embodiments of the present disclosure, the L1 layer may mean a physical layer. In addition, for example, the L2 layer may mean at least one of a MAC layer, an RLC layer, a PDCP layer, and an SDAP layer. In addition, for example, the L3 layer may mean an RRC layer.

Hereinafter, a bandwidth part (BWP) and a carrier will be described.

The bandwidth part (BWP) may be a set of consecutive Physical Resource Blocks (PRBs) within a given set of parameters. The PRBs may be selected from a contiguous subset of Common Resource Blocks (CRBs) for a given set of parameters on a given carrier.

When Bandwidth Adaptation (BA) is used, it is not required that a reception bandwidth and a transmission bandwidth of a User Equipment (UE) are as wide (or large) as those of a cell, and the reception bandwidth and the transmission bandwidth of the UE may be controlled (or adjusted). For example, the UE may receive information/configuration for bandwidth control (or adjustment) from the network/base station. In this case, bandwidth control (or adjustment) may be performed based on the received information/configuration. For example, the bandwidth control (or adjustment) may include a reduction/expansion of the bandwidth, a change in the location of the bandwidth, or a change in the subcarrier spacing of the bandwidth.

For example, bandwidth may be reduced during periods of little activity in order to conserve power. For example, the location of the bandwidth may be relocated (or shifted) from the frequency domain. For example, the location of the bandwidth may be relocated (or moved) from the frequency domain in order to enhance scheduling flexibility. For example, the subcarrier spacing of the bandwidth may vary. For example, the subcarrier spacing of the bandwidth may be varied to authorize different services. A subset of the total cell bandwidth of a cell may be referred to as a bandwidth part (BWP). The BA may be performed when the base station/network configures the BWP for the UE and when the base station/network informs the UE of the BWP currently in an active state among the BWPs.

For example, the BWP may be at least one of an active BWP, an initial BWP, and/or a default BWP. For example, the UE cannot monitor downlink radio link quality in DL BWPs other than active DL BWPs within the primary cell (PCell). For example, the UE cannot receive PDCCH, PDSCH or CSI-RS (except RRM) from outside of the active DL BWP. For example, the UE cannot trigger Channel State Information (CSI) reporting for inactive DL BWP. For example, the UE cannot transmit PUCCH or PUSCH from outside of inactive DL BWP. For example, in case of downlink, the initial BWP may be given as a contiguous set of RBs for RMSI core (configured by PBCH). For example, in case of uplink, the initial BWP may be given by the SIB for the random access procedure. For example, a default BWP may be configured by higher layers. For example, the initial value of the default BWP may be the initial DL BWP. To save power, if the UE cannot detect DCI within a predetermined time period, the UE may switch the active BWP of the UE to a default BWP.

Further, BWP may be defined for SL. The same SL BWP may be used for both transmission and reception. For example, a transmitting UE may transmit an SL channel or SL signal within a particular BWP, and a receiving UE may receive the SL channel or SL signal within the same particular BWP. In the licensed carrier, the SL BWP may be defined separately from the Uu BWP, and the SL BWP may have separate configuration signaling from the Uu BWP. For example, the UE may receive a configuration for SL BWP from the base station/network. SL BWP may be (pre-) configured for out-of-coverage NR V2X UEs and RRC _ IDLE UEs. For a UE operating in RRC _ CONNECTED mode, at least one SL BWP may be activated within a carrier.

Fig. 7 illustrates an example of BWP according to an embodiment of the present disclosure. The embodiment of fig. 7 may be combined with various embodiments of the present disclosure. It is assumed that the number of BWPs is 3 in the embodiment of fig. 7.

Referring to fig. 7, a Common Resource Block (CRB) may be a carrier resource block numbered from one end of a carrier band to the other end thereof. In addition, the PRB may be a resource block numbered within each BWP. Point a may indicate a common reference point of the resource block grid.

Offset (N) from point A^start _BWP) Sum bandwidth (N)^size _BWP) BWP is configured. For example, point a may be an external reference point of a PRB of a carrier, all parameter sets (e.g., all parameters supported by the network on the corresponding carrier)Number set) are aligned in point a. For example, the offset may be the PRB spacing between the lowest subcarrier within a given set of parameters and point a. For example, the bandwidth may be the number of PRBs within a given set of parameters.

Hereinafter, V2X or SL communication will be described.

Fig. 8 shows a radio protocol architecture for SL communication according to an embodiment of the present disclosure. The embodiment of fig. 8 may be combined with various embodiments of the present disclosure. More specifically, (a) in fig. 8 shows a user plane protocol stack, and (b) in fig. 8 shows a control plane protocol stack.

Next, the Secondary Link Synchronization Signal (SLSS) and the synchronization information will be described.

The SLSS may include a primary secondary link synchronization signal (PSSS) and a secondary link synchronization signal (SSSS) as SL specific sequences. The PSSS may be referred to as a secondary link primary synchronization signal (S-PSS) and the SSSS may be referred to as a secondary link secondary synchronization signal (S-SSS). For example, an M sequence of length 127 may be used for S-PSS, and a Gold (Gold) sequence of length 127 may be used for S-SSS. For example, the UE may use the S-PSS for initial signal detection and synchronization acquisition. For example, the UE may use the S-PSS and S-SSS for detailed synchronization acquisition and for detection of synchronization signal IDs.

The Physical Sidelink Broadcast Channel (PSBCH) may be a (broadcast) channel used to transmit default (system) information that the UE must first know before SL signal transmission/reception. For example, the default information may be information related to SLSS, Duplex Mode (DM), Time Division Duplex (TDD) uplink/downlink (UL/DL) configuration, information related to resource pool, type of application related to SLSS, subframe offset, broadcast information, and the like. For example, to evaluate PSBCH performance, in NR V2X, the payload size of the PSBCH may be 56 bits, including a 24-bit CRC.

The S-PSS, S-SSS, and PSBCH may be included in a block format supporting periodic transmission, e.g., SL Synchronization Signal (SS)/PSBCH blocks, hereinafter, secondary link synchronization signal blocks (S-SSB). The S-SSB may have the same set of parameters (i.e., SCS and CP length) as physical secondary link control channel (PSCCH)/physical secondary link shared channel (PSCCH) in the carrier, and the transmission bandwidth may exist within a (pre-) configured Secondary Link (SL) BWP. For example, the S-SSB may have a bandwidth of 11 resource blocks (SB). For example, the PSBCH may exist across 11 RBs. In addition, the frequency location of the S-SSB may be (pre-) configured. Thus, the UE does not have to perform hypothesis detection at frequency to discover the S-SSBs in the carrier.

Fig. 9 shows a UE performing V2X or SL communication according to an embodiment of the present disclosure. The embodiment of fig. 9 may be combined with various embodiments of the present disclosure.

Referring to fig. 9, in V2X or SL communication, the term "UE" may generally refer to a UE of a user. However, if a network device such as a BS transmits/receives signals according to a communication scheme between UEs, the BS may also be regarded as a kind of UE. For example, UE1 may be a first device 100 and UE2 may be a second device 200.

For example, the UE1 may select a resource unit corresponding to a specific resource in a resource pool that means a set of resource series. In addition, the UE1 may transmit the SL signal by using the resource element. For example, a resource pool in which the UE1 can transmit a signal may be configured to the UE2 as a receiving UE, and a signal of the UE1 may be detected in the resource pool.

Herein, if UE1 is within the connection range of the BS, the BS may inform the UE1 of the resource pool. Otherwise, if UE1 is out of the connection range of the BS, another UE may inform UE1 of the resource pool, or UE1 may use a pre-configured resource pool.

In general, a resource pool may be configured in units of multiple resources, and each UE may select a unit of one or more resources to use it in its SL signaling.

Hereinafter, resource allocation in SL will be described.

Fig. 10 illustrates a procedure for performing V2X or SL communication by a UE based on a transmission mode according to an embodiment of the present disclosure. The embodiment of fig. 10 may be combined with various embodiments of the present disclosure. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or a resource allocation mode. Hereinafter, for convenience of explanation, in LTE, the transmission mode may be referred to as an LTE transmission mode. In NR, a transmission mode may be referred to as an NR resource allocation mode.

For example, (a) in fig. 10 shows a UE operation related to LTE transmission mode 1 or LTE transmission mode 3. Alternatively, (a) in fig. 10 shows, for example, a UE operation related to NR resource allocation pattern 1. For example, LTE transmission mode 1 may be applied to normal SL communication, and LTE transmission mode 3 may be applied to V2X communication.

For example, (b) in fig. 10 illustrates a UE operation related to LTE transmission mode 2 or LTE transmission mode 4. Alternatively, (b) in fig. 10 shows, for example, a UE operation related to NR resource allocation pattern 2.

Referring to (a) of fig. 10, in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, a BS may schedule SL resources to be used by a UE for SL transmission. For example, the BS may perform resource scheduling for UE1 through PDCCH (more specifically, Downlink Control Information (DCI)), and UE1 may perform V2X or SL communication with UE2 according to the resource scheduling. For example, UE1 may transmit secondary link control information (SCI) to UE2 over a physical secondary link control channel (PSCCH), and thereafter transmit SCI-based data to UE2 over a physical secondary link shared channel (PSCCH).

Referring to (b) of fig. 10, in LTE transmission mode 2, LTE transmission mode 4, or NR resource allocation mode 2, the UE may determine SL transmission resources within SL resources configured by the BS/network or SL transmission resources configured in advance. For example, the configured SL resource or the preconfigured SL resource may be a resource pool. For example, the UE may autonomously select or schedule resources for SL transmission. For example, the UE may perform SL communication by autonomously selecting resources in the configured resource pool. For example, the UE may autonomously select resources within the selection window by performing a sensing and resource (re) selection procedure. For example, sensing may be performed in units of subchannels. In addition, the UE1, which has autonomously selected resources in the resource pool, can transmit SCI to the UE2 through PSCCH, and thereafter can transmit SCI-based data to the UE2 through PSCCH.

FIG. 11 illustrates three transmission types according to embodiments of the present disclosure. The embodiment of fig. 11 may be combined with various embodiments of the present disclosure. Specifically, (a) in fig. 11 shows a broadcast type SL communication, (b) in fig. 11 shows a unicast type SL communication, and (c) in fig. 11 shows a multicast type SL communication. In the case of the unicast type SL communication, the UE may perform one-to-one communication with another UE. In the case of multicast type SL transmission, the UE may perform SL communication with one or more UEs in a group to which the UE belongs. In various embodiments of the present disclosure, the SL multicast communication may be replaced with SL multicast communication, SL one-to-many communication, or the like.

Furthermore, in sidelink communications, the UE may need to efficiently select resources for sidelink transmissions. Hereinafter, a method of a UE efficiently selecting resources for sidelink transmission and an apparatus supporting the same will be described according to various embodiments of the present disclosure. In various embodiments of the present disclosure, the sidelink communications may include V2X communications.

At least one scheme proposed according to various embodiments of the present disclosure may be applied to at least any one of unicast communication, multicast communication, and/or broadcast communication.

The at least one method proposed according to various embodiments of the present disclosure may be applied not only to secondary link communication or V2X communication (e.g., PSCCH, PSBCH, PSSS/SSSS, etc.) or V2X communication based on a PC5 interface or a SL interface, but also to secondary link communication or V2X communication (e.g., PUSCH, PDSCH, PDCCH, PUCCH, etc.) based on a Uu interface.

In various embodiments of the present disclosure, the receiving operation of the UE may include a decoding operation and/or a receiving operation of a secondary link channel and/or a secondary link signal (e.g., PSCCH, pscsch, PSFCH, PSBCH, PSSS/SSSS, etc.). The reception operation of the UE may include a decoding operation and/or a reception operation of a WAN DL channel and/or WAN DL signal (e.g., PDCCH, PDSCH, PSS/SSS, etc.). The reception operation of the UE may include a sensing operation and/or a CBR measurement operation. In various embodiments of the present disclosure, the sensing operations of the UE may include a psch-RSRP measurement operation based on a psch DM-RS sequence, a psch-RSRP measurement operation based on a psch DM-RS sequence scheduled by a PSCCH successfully decoded by the UE, a secondary link RSSU (S-RSSI) measurement operation, and an S-RSSI measurement operation based on a V2X resource pool related subchannel. In various embodiments of the present disclosure, the transmission operation of the UE may include a transmission operation of a secondary link channel and/or a secondary link signal (e.g., PSCCH, pscsch, PSFCH, PSBCH, PSSS/SSSS, etc.). The transmission operations of the UE may include transmission operations of WAN UL channels and/or WAN UL signals (e.g., PUSCH, PUCCH, SRS, etc.). In various embodiments of the present disclosure, the synchronization signal may include an SLSS and/or a PSBCH.

In various embodiments of the present disclosure, the configuration may include signaling, signaling from the network, configuration from the network, and/or pre-configuration from the network. In various embodiments of the present disclosure, the definition may include signaling, signaling from a network, configuration from a network, and/or pre-configuration from a network. In various embodiments of the present disclosure, the designation may include signaling, signaling from a network, configuration from a network, and/or pre-configuration from a network.

In various embodiments of the present disclosure, ProSe Per Packet Priority (PPPP) may be replaced by ProSe Per Packet Reliability (PPPR), and PPPR may be replaced by PPPP. For example, this may mean that the smaller the PPPP value, the higher the priority, and the larger the PPPP value, the lower the priority. For example, this may mean that the smaller the PPPR value, the higher the reliability, and the larger the PPPR value, the lower the reliability. For example, the PPPP value associated with a service, packet or message associated with a high priority may be less than the PPPP value associated with a service, packet or message associated with a low priority. For example, a PPPR value associated with a service, packet, or message associated with high reliability may be less than a PPPR value associated with a service, packet, or message associated with low reliability.

In various embodiments of the present disclosure, a session may include at least any one of a unicast session (e.g., a unicast session for a secondary link), a multicast/multicast session (e.g., a multicast/multicast session for a secondary link), and/or a broadcast session (e.g., a broadcast session for a secondary link).

In various embodiments of the present disclosure, a carrier may be interpreted as at least any one of BWP and/or resource pool. For example, the carrier may include at least any one of BWP and/or a resource pool. For example, a carrier may include one or more BWPs. For example, BWP may include one or more resource pools.

Hereinafter, a physical channel and a signal transmission process will be described.

Fig. 12 shows an example of physical channels and signaling to which the present disclosure is applied.

Referring to fig. 12, a UE that is powered on again in a power-off state or newly enters a cell may perform an initial cell search operation such as synchronization with a BS in step S11. To this end, the UE may receive a Primary Synchronization Channel (PSCH) and a Secondary Synchronization Channel (SSCH) from the BS to synchronize with the BS, and may acquire information such as a cell Identity (ID). In addition, the UE may receive a Physical Broadcast Channel (PBCH) from the BS to acquire broadcast information in the cell. In addition, in the initial cell search step, the UE may receive a downlink reference signal (DL RS) to check a downlink channel state.

In step S12, the UE having completed the initial cell search may receive a Physical Downlink Control Channel (PDCCH) and its corresponding Physical Downlink Shared Channel (PDSCH) to acquire more specific system information.

Thereafter, the UE may perform a random access procedure to complete access to the BS in steps S13 to S16. Specifically, in step S13, the UE may transmit a preamble through a Physical Random Access Channel (PRACH), and in step S14, the UE may receive a Random Access Response (RAR) to the preamble through the PDCCH and its corresponding PDSCH. Thereafter, in step S15, the UE may transmit a Physical Uplink Shared Channel (PUSCH) using the scheduling information in the RAR, and in step S16, the UE may perform a contention resolution procedure as in the PDCCH and its corresponding PDSCH.

After performing the above-mentioned procedure, the UE may receive the PDCCH/PDSCH as a general uplink/downlink signal transmission procedure in step S17, and may transmit a PUSCH/Physical Uplink Control Channel (PUCCH) in step S18. The control information transmitted by the UE to the BS may be referred to as Uplink Control Information (UCI). The UCI may include hybrid automatic repeat and request (HARQ) Acknowledgement (ACK)/negative ACK (nack), Scheduling Request (SR), Channel State Information (CSI), and the like. The CSI may include a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), a Rank Indication (RI), and the like. In general, UCI is transmitted through PUCCH. However, when the control information and the data are to be simultaneously transmitted, the UCI may be transmitted through the PUSCH. In addition, the UE may aperiodically transmit UCI through a PUSCH according to a request/instruction of a network.

Hereinafter, cell search will be described.

Cell search is a process in which a UE acquires time and frequency synchronization for a cell and detects a physical layer cell ID of the cell. The UE receives a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) to perform cell search.

The UE should assume that reception occasions of PBCH, PSS and SSS exist across consecutive symbols and form an SS/PBCH block. The UE should assume that the SSS, PBCH DM-RS and PBCH data have the same EPRE. The UE may assume a ratio of SSs EPRE to PSS EPRE in the SS/PBCH block of the corresponding cell is 0dB or 3 dB.

The cell search procedure of the UE may be summarized as shown in table 5 below.

[ Table 5]

Also, in a communication environment between the BS and the UE according to the embodiment, when the UE reports aperiodic CSI (hereinafter, referred to as a-CSI), the BS may trigger a-CSI reporting to the UE or allocate resources to be used in the a-CSI reporting using, for example, an uplink grant. In this case, it may not be necessary to perform an independent Scheduling Request (SR) and/or Buffer Status Reporting (BSR) procedure for the a-CSI report from the UE's perspective. However, depending on whether a predetermined condition is satisfied, a change in SL channel quality, a frequency of occurrence of data transmission failure (or SL HARQ feedback information), etc., an operation in which a mode 1UE reports sub-link (SL) communication-related a-CSI (hereinafter, SL a-CSI) to a BS or reports SL a-CSI to another UE (which triggered SL a-CSI reporting) may be triggered for a mode 1UE even if the BS has not previously identified it. In an embodiment, a "condition" may be defined as a case where SL resource reselection is performed and/or a case where the SL Channel Busy Rate (CBR) value changes more than a predetermined threshold compared to a previous (reported) value and/or a case where the SL Reference Signal Received Power (RSRP) value changes more than a predetermined threshold compared to a previous (reported) value and/or a case where the Reference Signal Received Quality (RSRQ) value changes more than a predetermined threshold compared to a previous (reported) value and/or a case where the Received Signal Strength Indicator (RSSI) value changes more than a predetermined threshold compared to a previous (reported) value and/or a case where the SL Reference Signal Received Power (RSRP) value increases (or decreases) compared to a predetermined threshold and/or a case where the Reference Signal Received Quality (RSRQ) value increases (or decreases) compared to a predetermined threshold and/or a case where the RSRQ value between UEs and/or a case where the RSRQ value increases (or decreases) compared to a predetermined threshold (between UEs) A case where a Received Signal Strength Indicator (RSSI) is increased (or decreased) compared to a predetermined threshold and/or a case where a change in a SL Channel Quality Indicator (CQI) value (between UEs) compared to a previous (reported) value is greater than a predetermined threshold and/or a case where a change in a Precoding Matrix Indicator (PMI) value (between UEs) compared to a previous (reported) value is greater than a predetermined threshold and/or a case where a change in a Rank Indicator (RI) value (between UEs) compared to a previous (reported) value is greater than a predetermined threshold and/or a case where a change in a SL Channel Quality Indicator (CQI) value (between UEs) compared to a predetermined threshold is increased (or decreased) and/or a case where a change in a Precoding Matrix Indicator (PMI) value (between UEs) compared to a predetermined threshold and/or a case where a Rank Indicator (RI) value (between UEs) is increased (or decreased) compared to a predetermined threshold and/or RRC PC5 is (re) established between UEs Connection, etc.

Thus, in case of a mode 1UE performing SL communication (e.g., unicast communication) with another UE, a separate SR procedure (different from the UL data transmission case) may be performed on the BS (serving thereof) to request and/or allocate resources for SL a-CSI reporting. Alternatively, in case of a mode 1UE performing SL communication (e.g., unicast communication) with another UE, a separate SR procedure and/or BSR procedure (other than the UL data transmission case) may be performed on the BS (serving thereof) to request and/or allocate resources for SL a-CSI reporting.

In an embodiment, the resource requested through the SR (and/or BSR) procedure may be an UL resource (e.g., PUSCH) when the mode 1UE performs SL a-CSI report on (its serving) BS, and the resource requested through the SR (and/or BSR) procedure may be an SL resource (e.g., PSCCH/PSCCH) when the mode 1UE performs SL a-CSI report on another UE. For example, when a mode 1UE performs SL a-CSI reporting on another UE that triggered the SL a-CSI reporting, the resource requested through the SR (and/or BSR) procedure may be an SL resource (e.g., PSCCH/PSCCH).

In an embodiment, the SL a-CSI information may be defined in MAC CE format and may perform (independent) SR (and/or BSR) procedures to request and/or allocate resources for SL a-CSR reporting.

In an embodiment, the generation and/or reporting of SL a-CSI information on the PHY layer may be included as a trigger condition for the SR process of the MAC layer. In an embodiment, the triggering of the generation and/or reporting of SL a-CSI information on the PHY layer may be included as a triggering condition for the SR process of the MAC layer. In an embodiment, a PUSCH (or pscsch) -piggybacked SL a-CSI report on the PHY layer may be included as a trigger condition for the SR process of the MAC layer. In an embodiment, triggering of a PUSCH (or pscsch) -piggybacked SL a-CSI report on the PHY layer may be included as a triggering condition for the SR process of the MAC layer. In an embodiment, a PUSCH (or pscsch) -piggybacked SL a-CSI report on the PHY layer may be included as a trigger condition for SR and/or BSR procedures of the MAC layer. In an embodiment, the generation and triggering of SL a-CSI information on the PHY layer may be included as a triggering condition for the SR procedure and/or BSR procedure of the MAC layer. In an embodiment, the trigger of generation and triggering of SL a-CSI information on the PHY layer may be included as a trigger condition for an SR procedure and/or a BSR procedure of the MAC layer.

In an embodiment, when the mode 1UE performs SL a-CSI reporting on the BS, the SR process may be interpreted as an UL grant request process. In an embodiment, when a mode 1UE performs SL a-CSI reporting to (its serving) a BS, the SR (and/or BSR) procedure may be interpreted as a UL grant request procedure (for resource allocation (e.g., PUSCH) for SL a-SCI reporting).

In addition, in embodiments, when a mode 1UE performs SL a-CSI reporting on another UE, the SR process may be interpreted as a SL grant request process. In an embodiment, when a mode 1UE performs SL a-CSI reporting on another UE (that triggered the SL a-CSI reporting), the SR (and/or BSR) process may be interpreted as an SL grant request process (for resource allocation (e.g., PSCCH/PSCCH) for SL a-SCI reporting).

In an embodiment, the UE may use a MAC CE formatted container (or a PHY signaling formatted container) when reporting SL a-CSI to the BS, and the UE may use a PHY signaling based container (or a MAC CE formatted container) when reporting SL a-CSI to another UE. For example, the UE may use a MAC CE formatted container (or a PHY signaling formatted container) when reporting SL a-CSI to (its serving) BS, and the UE may use a PHY signaling based container (or a MAC CE formatted container) when reporting SL a-CSI to another UE (that triggered the SL a-CSI report). That is, when the report target is different, the containers to be used may be different. In addition, in the embodiment, the proposed contents are not limited to "MAC CE", but are also expansively applicable to a case where another container including L3 signaling (e.g., RRC) or the like is used.

When the UE transmits only SL a-CSI over the PSCCH, the QoS parameters (e.g., priority) on the relevant PSCCH (e.g., sensing purpose) may be predetermined.

In addition, the above proposed scheme is also expansively applicable not only when the mode 1UE performs SL a-SCI reporting to the BS but also when the mode 1UE reports SL a-SCI to another UE and when requesting the BS to allocate SL resources related to SL a-SCI reporting. For example, the proposed scheme described above is also expansively applicable not only when the mode 1UE performs SL a-CSI reporting to (its serving) the BS but also when the mode 1UE reports SL a-CSI to another UE (that triggered the SL a-CSI reporting) and requests allocation of SL resources related to the SL a-CSI reporting to (its serving) the BS.

Mode 1 may indicate a mode in which the BS schedules resources related to SL communication (e.g., SL transmission) to the UE, and mode 2 may indicate a mode in which the UE independently selects resources related to SL communication (e.g., SL transmission) within a pre-configured resource pool (from the network).

Fig. 13 illustrates a process in which a first device transmits SL CSI to a second device based on communication with a BS according to an embodiment of the present disclosure.

As shown in fig. 13, the first device 1302 according to an embodiment may report (or send) SL-CSI to another UE (in the case of fig. 13, the second device 1303). The first device 1302 according to an embodiment may correspond to a mode 1 UE.

The first device 1302 is specified to report the processing of the SL-SCI to the second device 1303 as follows.

In step S1310, the first device 1302 according to an embodiment may receive the SL CSI-RS and/or the SL CSI request from the second device 1303. In an embodiment, generation and/or transmission (or reporting) of SL CSI may be triggered in the first device 1302 based on the SLCSI-RS and/or SL CSI request. However, when the first device 1302 transmits the SL CSI to the second device 1303, step S1310 is not a necessary process. The first device 1302 according to an embodiment may transmit SL CSI based on steps S1320 to S1350, in addition to step S1310.

In an embodiment, the generation and/or transmission (or reporting) of SL CSI by the first device 1302 may be triggered based on at least one of SL resource being reselected, a SL Channel Busy Rate (CBR) value increasing compared to a predetermined threshold, a Reference Signal Received Power (RSRP) value increasing compared to a predetermined threshold, a RSRP value increasing compared to a predetermined threshold, a Received Signal Strength Indicator (RSSI) value increasing compared to a predetermined threshold, a SL CQI value increasing compared to a predetermined threshold, a SL PMI value increasing compared to a predetermined threshold, a SL RI value increasing compared to a predetermined threshold, and an instance of establishing a PC5 RRC connection between UEs.

In step S1320, the first device 1302 according to an embodiment may generate SL CSI. In an embodiment, the SL CSI may be generated in a PHY layer of the first device 1302. In an embodiment, the SL CSI may be passed from the PHY layer of the first device 1302 to the MAC layer of the first device 1302.

In step S1330, the first device 1302 according to an embodiment may transmit a Scheduling Request (SR) to the BS 1301. In an embodiment, the SR may be triggered by SL CSI passed from the PHY layer to the MAC layer. In an embodiment, SR may be triggered in the MAC layer based on SL CSI passed from the PHY layer to the MAC layer.

In step S1340, the first device 1302 according to an embodiment may receive information on SL resources from the BS 1301. Information about SL resources may be determined and/or generated by BS 1301 based on the SR.

In step S1350, the first device 1302 according to an embodiment may transmit SL CSI to the second device 1303. In an embodiment, the SL CSI may be transmitted to the second device 1303 through the MAC CE on SL resources derived based on information on the SL resources received from the BS 1301.

Fig. 14 illustrates a process in which a first device transmits SL CSI to a BS or a second device based on communication with the BS according to another embodiment of the present disclosure.

As shown in fig. 14, the first device 1402 according to an embodiment may report (or transmit) SL-CSI not only to another UE (in the case of fig. 14, the second device 1403) but also to the BS 1401. The first device 1402 according to an embodiment may correspond to a mode 1 UE.

Further, embodiments in which the first device 1402 reports SL-CSI to the second device 1303 or 1403 and/or the BS 1301 or 1401 are not limited to fig. 13 and 14. For example, the first device 1402 may report SL-CSI only to the BS 1401.

Further, although it is described in fig. 14 that the first device 1402 first reports SL-CSI to the second device 1403 (S1440) and then reports SL-CSI to the BS 1401 (S1470), the embodiment is not limited thereto. For example, the first device 1402 may first report SL-CSI to the BS 1401, and then may report SL-CSI to the second device 1403. In addition, one of ordinary skill in the art will readily appreciate that the order of operations is not limited by the reference numerals indicated in fig. 13 and 14.

Since steps S1410 to S1440 of fig. 14 perform the same or similar functions as steps S1310 to S1340 of fig. 13, the description of steps S1410 to S1440 will be omitted.

In step S1450, the first device 1402 according to the embodiment may transmit a second SR to the BS 1401 (S1450). The second SR may be different from the first SR transmitted to the BS 1401 to acquire information on SL resources.

In step S1460, the first device 1402 according to an embodiment may receive information related to UL resources determined based on the second SR from the BS 1401 (S1460). In an embodiment, information related to UL resources (or information on UL resources) may be included in the UL grant transmitted from the BS 1401.

In step S1470, the first device 1402 according to an embodiment may transmit (or report) SL CSI to the BS 1401. In an embodiment, the first device 1402 may transmit the SL CSI to the BS 1401 on UL resources derived based on information related to UL resources received from the BS 1401. In an embodiment, SL CSI may be transmitted from the first device 1402 to the BS 1401 over UL resources through the MAC CE.

Fig. 15 illustrates a process in which a first device transmits SL CSI to a second device based on resource selection according to an embodiment of the present disclosure.

As shown in fig. 15, the first device 1501 according to an embodiment may not report (or transmit) SL-CSI to another UE (in the case of fig. 15, the second device 1502) based on the result of communication with the BS. The first device 1501 according to an embodiment may correspond to a mode 2 UE.

The first device 1501 is designated as follows to report the processing of the SL-SCI to the second device 1502.

In step S1510, the first device 1501 according to an embodiment may receive a SL CSI-RS and/or a SL CSI request from the second device 1502. In an embodiment, generation and/or transmission (or reporting) of SL CSI may be triggered in the first device 1501 based on the SL CSI-RS and/or SL CSI request. However, when the first device 1501 transmits the SL CSI to the second device 1502, step S1510 is not a necessary process. In addition to step S1510, the first device 1501 according to an embodiment may transmit SL CSI based on steps S1520 to S1540.

In an embodiment, the generation and/or sending (or reporting) of SL CSI by the first device 1501 may be triggered based on at least one of SL resource being reselected, a SL Channel Busy Rate (CBR) value increasing compared to a predetermined threshold, a Reference Signal Received Power (RSRP) value increasing compared to a predetermined threshold, a RSRP value increasing compared to a predetermined threshold, a Received Signal Strength Indicator (RSSI) value increasing compared to a predetermined threshold, a SL CQI value increasing compared to a predetermined threshold, a SL PMI value increasing compared to a predetermined threshold, a SL RI value increasing compared to a predetermined threshold, and a PC5 RRC connection being established between UEs.

In step S1520, the first device 1501 according to the embodiment may generate the SLCSI. In an embodiment, the SL CSI may be generated in the PHY layer of the first device 1501. In an embodiment, the SLCSI may be passed from the PHY layer of the first device 1501 to the MAC layer of the first device 1501.

In step S1530, the first device 1501 according to the embodiment may determine SL resources for transmitting SL CSI to the second device 1502.

In an embodiment, the SL resources used to send the SL CSI to the second device 1502 may be pre-configured resources.

In another embodiment, the SL resources used to send SL CSI to the second device 1502 may be SL resources determined by the first device 1501 based on resource selection.

In step S1540, the first device 1501 according to the embodiment may transmit SL CSI to the second device 1502 through the SL resource. In an embodiment, the SL CSI may be sent to the second device 1502 over the SL resources through the MAC CE. In an embodiment, the SL CSI may be transmitted to the second device 1502 by the MAC CE on SL resources determined based on the resource selection.

Fig. 16 is a flow chart illustrating operation of a first device according to an embodiment of the present disclosure.

The operations disclosed in the flowchart of fig. 16 may be performed in conjunction with various embodiments of the present disclosure. In an embodiment, the operations disclosed in the flowchart of fig. 16 may be performed based on at least one of the devices shown in fig. 18 to 23.

In step S1610, the first device according to an embodiment may generate SL Channel State Information (CSI) related to a channel state between the first device and the second device in a MAC Control Element (CE) format through a Medium Access Control (MAC) layer.

In step S1620, the first device according to an embodiment may transmit a first Scheduling Request (SR) to the base station, the first SR being triggered based on the SL CSI in the MAC CE format.

In step S1630, the first device according to an embodiment may receive a SL grant from the base station.

In step S1640, the first device according to an embodiment may transmit SL CSI to the second device on SL resources related to the SL grant.

The first device according to an embodiment may generate SL CSI in a MAC CE format related to a channel state between the first device and the second device.

The first device according to an embodiment may transmit SL CSI to the second device.

In an embodiment, the generation of the SL CSI and the transmission of the SL CSI to the second device may be triggered by PHY layer signaling related to the reporting trigger of the SL CSI.

In an embodiment, the priority of SL CSI for MAC CE format may be predetermined. That is, the priority of SL CSI for MAC CE format may be predefined. The priority of the SL CSI in MAC CE format may be configured from the BS or may be based on pre-configuration.

A first device according to an embodiment may transmit a first Scheduling Request (SR) to a BS.

In an embodiment, the first SR may be triggered by SL CSI in MAC CE format, which is generated by PHY layer signaling related to reporting triggering of SL CSI.

The first device according to an embodiment may receive a SL grant from the BS. The SL CSI may be transmitted to the second device on SL resources associated with the SL grant through the MAC CE.

In an embodiment, the SL grant may be associated with a first SR transmitted to the BS.

The first device according to an embodiment may transmit a second SR to the BS, receive an UL grant from the BS, and transmit SL CSI to the BS on UL resources related to the UL grant.

In an embodiment, the SL CSI may be transmitted to the BS on UL resources through the MAC CE.

In an embodiment, the UL grant may be related to the second SR.

In an embodiment, the SL CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), and a Rank Indicator (RI).

In an embodiment, the SL CSI may be transmitted to the BS based on at least one of a case where the SL resource is reselected, a case where a SL Channel Busy Rate (CBR) value is increased compared to a predetermined threshold, a case where a Reference Signal Received Power (RSRP) value is increased compared to a predetermined threshold, a case where an RSRP value is increased compared to a predetermined threshold, a case where a Received Signal Strength Indicator (RSSI) value is increased compared to a predetermined threshold, a case where a SL CQI value is increased compared to a predetermined threshold, a case where a SL PMI value is increased compared to a predetermined threshold, a case where a SL RI value is increased compared to a predetermined threshold, and a PC5 RRC connection is established between UEs.

The first device according to an embodiment may determine SL resources for transmitting SL CSI to the second device based on the resource selection, and may transmit the SL CSI to the second device through the MAC CE based on the SL resources.

In an embodiment, the transmission of the first SR may be triggered by PHY layer signaling related to the reporting trigger of the SL CSI.

In an embodiment, a SL CSI-related Buffer Status Report (BSR) for triggering transmission of the first SR may not be defined, and transmission of the first SR may not be triggered by the BSR.

In an embodiment, a first SR configuration for a first SR and a second SR configuration for a second SR based on BSR triggering may be different from each other, and a BSR related to the second SR configuration may be related to at least one of SL data or UL data unrelated to SL CSI of a MAC CE format.

For example, if the SR configuration related to SL data and the SR configuration related to SL CSI are independently or differently configured for the mode 1UE, the mode 1UE may apply at least any one of the following options. For example, the SR configuration may include information related to SR resources, information related to a period, and/or information related to a slot offset, and the like.

1) First option

For example, when the mode 1UE simultaneously performs transmission related to SL data and transmission related to SL CSI and/or when the mode 1UE multiplexes SL data and SL CSI on one MAC PDU, the mode 1UE may transmit an SR to the BS based on only SR configuration related to SL data. Herein, the corresponding rule may be useful in case that no BSR related to SL CSI is defined (unlike in SL data). In this case, for example, the mode 1UE may omit SR transmission based on the SR configuration related to the SL CSI.

For example, when the mode-1 UE simultaneously performs transmission related to SL data and transmission related to SL CSI and/or when the mode-1 UE multiplexes SL data and SL CSI on one MAC PDU, the mode-1 UE may transmit an SR to the BS based on only the SR configuration related to SL CSI. In this case, for example, the mode 1UE may omit SR transmission based on SR configuration based on SL data.

2) Second option

For example, when the mode-1 UE simultaneously performs transmission related to SL data and transmission related to SLCSI and/or when the mode-1 UE multiplexes SL data and SL CSI on one MAC PDU, the mode-1 UE may perform both SR transmission based on the SR configuration related to SL CSI and SR transmission based on the SR configuration related to SL data.

3) Third option

For example, when the mode 1UE simultaneously performs transmission related to SL data and transmission related to SL CSI and/or when the mode 1UE multiplexes SL data and SL CSI on one MAC PDU, the mode 1UE may apply the second option (or the first option) when the remaining latency budget related to SL CSI reporting is insufficient for the (processing) delay required in SR transmission based on the SR configuration related to SL CSI reporting. Otherwise, the mode 1UE may apply the first option (or the second option).

According to an embodiment of the present disclosure, a first device for performing SL communication may be provided. The first device may include at least one memory storing instructions, at least one transceiver, and at least one processor connecting the at least one memory and the at least one transceiver. The at least one processor may be configured to: generating, by a Medium Access Control (MAC) layer, SL Channel State Information (CSI) related to a channel state between a first device and a second device in a MAC Control Element (CE) format; controlling at least one transceiver to transmit a first Scheduling Request (SR) to a base station, the first SR being triggered based on SL CSI in a MAC CE format; controlling at least one transceiver to receive a SL grant from a base station; and control the at least one transceiver to transmit the SL CSI to the second device on SL resources associated with the SL grant.

According to an embodiment of the present disclosure, there may be provided an apparatus (or a chip (set)) configured to control a first terminal. The apparatus may include at least one processor and at least one computer memory operatively connectable with the at least one processor and storing instructions. The at least one processor may execute instructions to control the first terminal to: generating, by a Medium Access Control (MAC) layer, SL Channel State Information (CSI) related to a channel state between the first device and a second device in a MAC Control Element (CE) format; transmitting a first Scheduling Request (SR) to a base station, the first SR being triggered based on SL CSI in a MAC CE format; receiving a SL grant from a base station; and transmitting the SL CSI to the second device on SL resources related to the SL grant.

In an embodiment, the first terminal of this embodiment may represent the first device described throughout this disclosure. In an embodiment, the at least one processor, the at least one memory, etc. in the device for controlling the first terminal may be implemented as respective separate sub-chips, or at least two or more components may be implemented by one sub-chip.

According to an embodiment of the present disclosure, a non-transitory computer-readable storage medium having instructions (or directions) stored thereon may be provided. The instructions, when executed by the at least one processor, may cause the first device to: generating, by a Medium Access Control (MAC) layer, SL Channel State Information (CSI) related to a channel state between the first device and a second device in a MAC Control Element (CE) format; transmitting a first Scheduling Request (SR) to a base station, the first SR being triggered based on SL CSI in a MAC CE format; receiving a SL grant from a base station; and transmitting the SL CSI to the second device on SL resources related to the SL grant.

Fig. 17 is a flowchart illustrating an operation of a second device according to an embodiment of the present disclosure.

The operations disclosed in the flowchart of fig. 17 may be performed in conjunction with various embodiments of the present disclosure. In an embodiment, the operations disclosed in the flowchart of fig. 17 may be performed based on at least one of the devices shown in fig. 18 to 23.

In step S1710, the second device according to an embodiment may receive SL CSI related to a channel state between the first device and the second device.

In an embodiment, a Scheduling Request (SR) of the first device may be triggered by SL CSI generated in a Media Access Control (MAC) CE format in a MAC CE layer of the first device. The SL CSI may be received on SL resources associated with a SL grant received by the first device from the base station.

In an embodiment, the generation of the SL CSI and the transmission of the SL CSI to the second device may be triggered by PHY layer signaling related to the reporting trigger of the SL CSI.

In an embodiment, the priority of SL CSI for MAC CE format may be predetermined. That is, the priority of SL CSI for MAC CE format may be predefined. The priority of the SL CSI in MAC CE format may be configured from the BS or may be based on pre-configuration.

A first device according to an embodiment may transmit a first Scheduling Request (SR) to a BS.

In an embodiment, the first SR may be triggered by SL CSI in MAC CE format, which is generated by PHY layer signaling related to reporting triggering of SL CSI.

The first device according to an embodiment may receive a SL grant from the BS. The SL CSI may be transmitted to the second device on SL resources associated with the SL grant through the MAC CE.

In an embodiment, the SL grant may be associated with a first SR transmitted to the BS.

The first device according to an embodiment may transmit a second SR to the BS, receive an UL grant from the BS, and transmit SL CSI to the BS on UL resources related to the UL grant.

In an embodiment, the SLCSI may be transmitted to the BS on UL resources through the MAC CE.

In an embodiment, the UL grant may be related to the second SR.

In an embodiment, the SL CSI may include at least one of a Channel Quality Indicator (CQI), a Precoding Matrix Indicator (PMI), and a Rank Indicator (RI).

In an embodiment, the SL CSI may be transmitted to the BS based on at least one of a case where the SL resource is reselected, a case where a SL Channel Busy Rate (CBR) value is increased compared to a predetermined threshold, a case where a Reference Signal Received Power (RSRP) value is increased compared to a predetermined threshold, a case where an RSRP value is increased compared to a predetermined threshold, a case where a Received Signal Strength Indicator (RSSI) value is increased compared to a predetermined threshold, a case where a SL CQI value is increased compared to a predetermined threshold, a case where a SL PMI value is increased compared to a predetermined threshold, a case where a SL RI value is increased compared to a predetermined threshold, and a PC5 RRC connection is established between UEs.

The first device according to an embodiment may determine SL resources for transmitting SL CSI to the second device based on the resource selection, and may transmit the SL CSI to the second device through the MAC CE based on the SL resources.

In an embodiment, the transmission of the first SR may be triggered by PHY layer signaling related to the reporting trigger of the SL CSI.

In an embodiment, a SL CSI-related Buffer Status Report (BSR) for triggering transmission of the first SR may not be defined, and transmission of the first SR may not be triggered by the BSR.

In an embodiment, a first SR configuration for a first SR and a second SR configuration for a second SR based on BSR triggering may be different from each other, and a BSR related to the second SR configuration may be related to at least one of SL data or UL data unrelated to SL CSI of a MAC CE format.

For example, if the SR configuration related to SL data and the SR configuration related to SL CSI are independently or differently configured for the mode 1UE, the mode 1UE may apply at least any one of the following options. For example, the SR configuration may include information related to SR resources, information related to a period, and/or information related to a slot offset, and the like.

1) First option

For example, when the mode 1UE simultaneously performs transmission related to SL data and transmission related to SL CSI and/or when the mode 1UE multiplexes SL data and SL CSI on one MAC PDU, the mode 1UE may transmit an SR to the BS based on only SR configuration related to SL data. Herein, the corresponding rule may be useful in case that no BSR related to SL CSI is defined (unlike in SL data). In this case, for example, the mode 1UE may omit SR transmission based on the SR configuration related to the SL CSI.

For example, when the mode-1 UE simultaneously performs transmission related to SL data and transmission related to SL CSI and/or when the mode-1 UE multiplexes SL data and SL CSI on one MAC PDU, the mode-1 UE may transmit an SR to the BS based on only the SR configuration related to SL CSI. In this case, for example, the mode 1UE may omit SR transmission based on SR configuration based on SL data.

2) Second option

For example, when the mode-1 UE simultaneously performs transmission related to SL data and transmission related to SLCSI and/or when the mode-1 UE multiplexes SL data and SL CSI on one MAC PDU, the mode-1 UE may perform both SR transmission based on the SR configuration related to SL CSI and SR transmission based on the SR configuration related to SL data.

3) Third option

For example, when the mode 1UE simultaneously performs transmission related to SL data and transmission related to SL CSI and/or when the mode 1UE multiplexes SL data and SL CSI on one MAC PDU, the mode 1UE may apply the second option (or the first option) when the remaining latency budget related to SL CSI reporting is insufficient for the (processing) delay required in SR transmission based on the SR configuration related to SL CSI reporting. Otherwise, the mode 1UE may apply the first option (or the second option).

According to an embodiment of the present disclosure, there is provided a second device for receiving a SL CSL. The second device may include at least one memory storing instructions, at least one transceiver, and at least one processor coupled to the at least one memory and the at least one transceiver. The at least one processor may control the at least one transceiver to receive, from the first device, SL CSI in a MAC CE format related to a channel state between the first device and the second device.

Various embodiments of the present disclosure may be implemented independently. Alternatively, various embodiments of the present disclosure may be implemented by combination or merger. For example, although various embodiments of the present disclosure have been described based on the 3GPP LTE system for convenience of explanation, the various embodiments of the present disclosure may be expansively applied to another system other than the 3GPP LTE system. For example, various embodiments of the present disclosure may also be used in the context of uplink or downlink, and are not limited to direct communication between terminals. In this case, the base station, relay node, etc. may use the proposed methods according to various embodiments of the present disclosure. For example, it may be defined that information on whether to apply the method according to various embodiments of the present disclosure is reported to a terminal by a base station or reported to a receiving terminal by a transmitting terminal through predefined signaling (e.g., physical layer signaling or higher layer signaling). For example, it may be defined that information on a rule according to various embodiments of the present disclosure is reported by a base station to a terminal or reported by a transmitting terminal to a receiving terminal through predefined signaling (e.g., physical layer signaling or higher layer signaling). For example, some of the various embodiments of the present disclosure may be applied to resource allocation pattern 1 only with restrictions. For example, some of the various embodiments of the present disclosure may be applied to resource allocation pattern 2 only with restrictions.

Hereinafter, an apparatus to which various embodiments of the present disclosure can be applied will be described.

The various descriptions, functions, processes, proposals, methods and/or operational flows of the present disclosure described in this document may be applied to, but are not limited to, various fields requiring wireless communication/connection (e.g., 5G) between devices.

Hereinafter, a description will be given in more detail with reference to the accompanying drawings. In the following drawings/description, the same reference numerals may denote the same or corresponding hardware, software, or functional blocks, unless otherwise described.

Fig. 18 shows a communication system (1) according to an embodiment of the present disclosure.

A communication system (1) to which various embodiments of the present disclosure are applied with reference to fig. 18 includes a wireless device, a Base Station (BS), and a network. Herein, a wireless device denotes a device that performs communication using a Radio Access Technology (RAT), e.g., a 5G new RAT (nr) or Long Term Evolution (LTE), and may be referred to as a communication/radio/5G device. The wireless devices may include, without limitation, a robot (100a), vehicles (100b-1, 100b-2), an augmented reality (XR) device (100c), a handheld device (100d), a home appliance (100e), an internet of things (IoT) device (100f), and an Artificial Intelligence (AI) device/server (400). For example, the vehicle may include a vehicle having a wireless communication function, an autonomous vehicle, and a vehicle capable of performing inter-vehicle communication. Herein, a vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., drone). The XR device may include an Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) device and may be implemented in the form of a Head Mounted Device (HMD), a Head Up Display (HUD) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, and the like. Handheld devices may include smart phones, smart pads, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). The home appliances may include a TV, a refrigerator, and a washing machine. The IoT devices may include sensors and smart meters. For example, the BS and the network may be implemented as wireless devices, and a particular wireless device (200a) may operate as a BS/network node with respect to other wireless devices.

The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The AI technique may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other through the BS 200/network 300, the wireless devices 100a to 100f may perform direct communication (e.g., sidelink communication) with each other without passing through the BS/network. For example, the vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V)/vehicle-to-all (V2X) communication). The IoT devices (e.g., sensors) may perform direct communication with other IoT devices (e.g., sensors) or other wireless devices 100 a-100 f.

Wireless communication/connection 150a, 150b, or 150c may be established between wireless devices 100 a-100 f/BS 200 or BS 200/BS 200. Here, the wireless communication/connection may be established over various RATs (e.g., 5G NR) such as uplink/downlink communication 150a, sidelink communication 150b (or D2D communication), or inter-BS communication (e.g., relay, access backhaul Integration (IAB)). The wireless device and the BS/wireless device may send/receive radio signals to/from each other over wireless communications/connections 150a and 150 b. For example, wireless communications/connections 150a and 150b may transmit/receive signals over various physical channels. To this end, at least a portion of various configuration information configuration procedures, various signal processing procedures (e.g., channel coding/decoding, modulation/demodulation, and resource mapping/demapping), and resource allocation procedures for transmitting/receiving radio signals may be performed based on various proposals of the present disclosure.

Fig. 19 illustrates a wireless device according to an embodiment of the present disclosure.

Referring to fig. 19, the first wireless apparatus (100) and the second wireless apparatus (200) may transmit radio signals through various RATs (e.g., LTE and NR). Herein, { first wireless device (100) and second wireless device (200) } may correspond to { wireless device (100x) and BS (200) } and/or { wireless device (100x) and wireless device (100x) } in fig. 18.

The first wireless device 100 may include one or more processors 102 and one or more memories 104, and may additionally further include one or more transceivers 106 and/or one or more antennas 108. The processor(s) 102 may control the memory(s) 104 and/or the transceiver(s) 106 and may be configured to implement the descriptions, functions, procedures, proposals, methods and/or operational procedures disclosed herein. For example, processor(s) 102 may process information in memory (es) 104 to generate a first information/signal and then transmit a radio signal including the first information/signal through transceiver(s) 106. The processor(s) 102 may receive the radio signal including the second information/signal through the transceiver 106 and then store information obtained by processing the second information/signal in the memory(s) 104. The memory(s) 104 may be connected to the processor(s) 102 and may store various information related to the operation of the processor(s) 102. For example, the memory(s) 104 may store software code including instructions for performing a portion or all of the processing controlled by the processor(s) 102 or for performing the descriptions, functions, procedures, proposals, methods and/or operational flows disclosed herein. Here, the processor(s) 102 and memory(s) 104 may be part of a communication modem/circuit/chip designed to implement a RAT (e.g., LTE or NR). Transceiver(s) 106 may be connected to processor(s) 102 and transmit and/or receive radio signals through antenna(s) 108. Each transceiver 106 may include a transmitter and/or a receiver. The transceiver(s) 106 may be used interchangeably with Radio Frequency (RF) unit(s). In this disclosure, the wireless device may represent a communication modem/circuit/chip.

The second wireless device 200 may include one or more processors 202 and one or more memories 204, and may additionally further include one or more transceivers 206 and/or one or more antennas 208. The processor(s) 202 may control the memory(s) 204 and/or the transceiver(s) 206 and may be configured to implement the descriptions, functions, procedures, proposals, methods and/or operational procedures disclosed herein. For example, processor(s) 202 may process the information in memory(s) 204 to generate a third information/signal and then transmit a radio signal including the third information/signal through transceiver(s) 206. The processor(s) 202 may receive the radio signal including the fourth information/signal through the transceiver(s) 106 and then store information obtained by processing the fourth information/signal in the memory(s) 204. The memory(s) 204 may be connected to the processor(s) 202 and may store various information related to the operation of the processor(s) 202. For example, memory(s) 204 may store software code including instructions for performing a portion or all of the processing controlled by processor(s) 202 or for performing the descriptions, functions, procedures, proposals, methods and/or operational flows disclosed herein. Here, the processor(s) 202 and memory(s) 204 may be part of a communication modem/circuit/chip designed to implement a RAT (e.g., LTE or NR). The transceiver(s) 206 may be connected to the processor(s) 202 and transmit and/or receive radio signals through the antenna(s) 208. Each transceiver 206 may include a transmitter and/or a receiver. The transceiver(s) 206 may be used interchangeably with the RF unit(s). In this disclosure, the wireless device may represent a communication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by, but are not limited to, one or more processors 102 and 202. For example, the one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, and SDAP). The one or more processors 102 and 202 may generate one or more Protocol Data Units (PDUs) and/or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and/or operational flows disclosed herein. The one or more processors 102 and 202 may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and/or operational flows disclosed herein. The one or more processors 102 and 202 may generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and/or operational flows disclosed herein and provide the generated signals to the one or more transceivers 106 and 206. One or more processors 102 and 202 can receive signals (e.g., baseband signals) from one or more transceivers 106 and 206 and retrieve PDUs, SDUs, messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and/or operational procedures disclosed herein.

The one or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. The one or more processors 102 and 202 may be implemented in hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in the one or more processors 102 and 202. The descriptions, functions, procedures, proposals, methods and/or operational flows disclosed in this document may be implemented using firmware or software, and the firmware or software may be configured to include modules, procedures or functions. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods and/or operational procedures disclosed herein may be included in the one or more processors 102 and 202 or stored in the one or more memories 104 and 204, thereby being driven by the one or more processors 102 and 202. The descriptions, functions, procedures, proposals, methods and/or operational flows disclosed herein may be implemented using software or firmware in the form of codes, commands and/or command sets.

The one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 and may store various types of data, signals, messages, information, programs, code, instructions, and/or commands. The one or more memories 104 and 204 may be comprised of Read Only Memory (ROM), Random Access Memory (RAM), electrically Erasable Programmable Read Only Memory (EPROM), flash memory, hard drives, registers, cash memory, computer-readable storage media, and/or combinations thereof. The one or more memories 104 and 204 may be located internal and/or external to the one or more processors 102 and 202. The one or more memories 104 and 204 may be connected to the one or more processors 102 and 202 through various techniques, such as wired or wireless connections.

One or more transceivers 106 and 206 may transmit user data, control information, and/or radio signals/channels referred to in the methods and/or operational procedures of this document to one or more other devices. The one or more transceivers 106 and 206 may receive user data, control information, and/or radio signals/channels referred to in the descriptions, functions, procedures, proposals, methods and/or operational flows disclosed herein from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and may send and receive radio signals. For example, one or more processors 102 and 202 may perform control such that one or more transceivers 106 and 206 may transmit user data, control information, or radio signals to one or more other devices. The one or more processors 102 and 202 may perform control such that the one or more transceivers 106 and 206 may receive user data, control information, or radio signals from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208, and one or more transceivers 106 and 206 may be configured to transmit and receive, through one or more antennas 108 and 208, user data, control information, and/or radio signals/channels referred to in the descriptions, functions, procedures, proposals, methods and/or operational flows disclosed herein. In this document, the one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). The one or more transceivers 106 and 206 may convert received radio signals/channels, etc. from RF band signals to baseband signals to process the received user data, control information, radio signals/channels, etc. using the one or more processors 102 and 202. The one or more transceivers 106 and 206 may convert user data, control information, radio signals/channels, etc. processed using the one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include an (analog) oscillator and/or a filter.

Fig. 20 shows a signal processing circuit for transmitting signals according to an embodiment of the present disclosure.

Referring to fig. 20, the signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). The operations/functions of fig. 20 may be performed without limitation to the processor (102, 202) and/or transceiver (106, 206) of fig. 19. The hardware elements of fig. 20 may be implemented by the processor (102, 202) and/or the transceiver (106, 206) of fig. 19. Blocks 1010 through 1060 may be implemented, for example, by the processor (102, 202) of fig. 19. Alternatively, blocks 1010-1050 may be implemented by the processor (102, 202) of fig. 19, and block 1060 may be implemented by the transceiver (106, 206) of fig. 19.

The codeword may be converted into a radio signal via the signal processing circuit (1000) of fig. 20. Herein, a codeword is a sequence of coded bits of an information block. The information block may comprise a transport block (e.g., UL-SCH transport block, DL-SCH transport block). The radio signal may be transmitted through various physical channels (e.g., PUSCH and PDSCH).

In particular, the codeword may be converted to a scrambled bit sequence by scrambler 1010. The scrambling sequence used for scrambling may be generated based on an initial value, and the initial value may include ID information of the wireless device. The scrambled bit sequence may be modulated into a sequence of modulation symbols by a modulator 1020. The modulation schemes may include pi/2-binary phase shift keying (pi/2-BPSK), m-phase shift keying (m-PSK), and m-quadrature amplitude modulation (m-QAM). The complex modulation symbol sequences may be mapped to one or more transmission layers by a layer mapper 1030. The modulation symbols for each transmission layer may be mapped (precoded) by precoder 1040 to the corresponding antenna port(s). The output z of the precoder 1040 may be derived by multiplying the output y of the layer mapper 1030 by the N x M precoding matrix W. Here, N is the number of antenna ports, and M is the number of transport layers. The precoder 1040 may perform precoding after performing transform precoding (e.g., DFT) on the complex modulation symbols. Alternatively, the precoder 1040 may perform precoding without performing transform precoding.

The resource mapper 1050 may map the modulation symbols for each antenna port to time-frequency resources. The time-frequency resources may include a plurality of symbols in the time domain (e.g., CP-OFDMA symbols and DFT-s-OFDMA symbols) and a plurality of subcarriers in the frequency domain. The signal generator 1060 may generate a radio signal from the mapped modulation symbols, and the generated radio signal may be transmitted to other apparatuses through each antenna. To this end, the signal generator 1060 may include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a digital-to-analog converter (DAC), and an up-converter.

The signal processing procedure for signals received in a wireless device may be configured in a manner inverse to the signal processing procedures (1010-1060) of FIG. 20. For example, a wireless device (e.g., 100, 200 of fig. 19) may receive radio signals from the outside through an antenna port/transceiver. The received radio signal may be converted into a baseband signal by a signal recoverer. To this end, the signal recoverer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Next, the baseband signal may be restored to a codeword through a resource demapping process, a post-encoding process, a demodulation processor, and a descrambling process. The codeword can be restored to the original information block by decoding. Accordingly, a signal processing circuit (not illustrated) for receiving a signal may include a signal recoverer, a resource demapper, a post-encoder, a demodulator, a descrambler, and a decoder.

Fig. 21 shows another example of a wireless device according to an embodiment of the present disclosure. The wireless device may be implemented in various forms according to use cases/services (refer to fig. 18).

Referring to fig. 21, the wireless device (100, 200) may correspond to the wireless device (100, 200) of fig. 19, and may be configured by various elements, components, units/sections, and/or modules. For example, each of the wireless devices (100, 200) may include a communication unit (110), a control unit (120), a storage unit (130), and an additional component (140). The communication unit may include communication circuitry (112) and transceiver(s) (114). For example, the communication circuitry (112) may include one or more processors (102, 202) and/or one or more memories (104, 204) of fig. 19. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and/or one or more antennas (108, 208) of fig. 19. The control unit (120) is electrically connected to the communication unit (110), the memory (130), and the additional component (140), and controls the overall operation of the wireless device. For example, the control unit (120) may control the electrical/mechanical operation of the wireless device based on programs/codes/commands/information stored in the storage unit (130). The control unit (120) may transmit information stored in the storage unit (130) to the outside (e.g., other communication devices) through the communication unit (110) through a wireless/wired interface, or store information received from the outside (e.g., other communication devices) through the wireless/wired interface via the communication unit (110) in the storage unit (130).

The additional components (140) may be variously configured according to the type of wireless device. For example, the additional component (140) may comprise at least one of a power unit/battery, an input/output (I/O) unit, a drive unit and a calculation unit. The wireless device may be implemented in the form of, without limitation: a robot (100a of fig. 18), a vehicle (100b-1 and 100b-2 of fig. 18), an XR device (100c of fig. 18), a handheld device (100d of fig. 18), a home appliance (100e of fig. 18), an IoT device (100f of fig. 18), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a financial technology device (or financial device), a security device, a climate/environment device, an AI server/device (400 of fig. 18), a BS (200 of fig. 18), a network node, and the like. The wireless device may be used in a mobile or fixed place according to use cases/services.

In fig. 21, various elements, components, units/sections, and/or modules in the wireless device (100, 200) may all be connected to each other through a wired interface, or at least part thereof may be wirelessly connected through the communication unit (110). For example, in each of the wireless devices (100, 200), the control unit (120) and the communication unit (110) may be connected by wire, and the control unit (120) and the first unit (e.g., 130, 140) may be connected wirelessly by the communication unit (110). Each element, component, unit/portion and/or module within a wireless device (100, 200) may also include one or more elements. For example, the control unit (120) may be constructed by a set of one or more processors. As an example, the control unit (120) may be constructed by a collection of a communication control processor, an application processor, an Electronic Control Unit (ECU), a graphics processing unit, and a memory control processor. As another example, the memory (130) may be constructed from Random Access Memory (RAM), dynamic RAM (dram), Read Only Memory (ROM), flash memory, volatile memory, non-volatile memory, and/or combinations thereof.

Hereinafter, an example of implementing fig. 21 will be described in detail with reference to the accompanying drawings.

Fig. 22 illustrates a handheld device, in accordance with an embodiment of the present disclosure. The handheld device may include a smartphone, a smart pad, a wearable device (e.g., a smart watch or smart glasses), or a portable computer (e.g., a notebook). A handheld device may be referred to as a Mobile Station (MS), a User Terminal (UT), a mobile subscriber station (MSs), a Subscriber Station (SS), an Advanced Mobile Station (AMS), or a Wireless Terminal (WT).

Referring to fig. 22, the handheld device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a storage unit (130), a power supply unit (140a), an interface unit (140b), and an I/O unit (140 c). The antenna unit (108) may be configured as part of a communication unit (110). The blocks 110 to 130/140a to 140c correspond to the blocks 110 to 130/140 of fig. 21, respectively.

The communication unit 110 may transmit and receive signals (e.g., data signals and control signals) to and from other wireless devices or BSs. The control unit 120 may perform various operations by controlling the constituent elements of the handheld device 100. The control unit 120 may include an Application Processor (AP). The memory unit 130 may store data/parameters/programs/codes/commands required to drive the handheld device 100. The storage unit 130 may store input/output data/information. The power supply unit 140a may supply power to the handheld device 100 and include a wired/wireless charging circuit, a battery, and the like. The interface unit 140b may support the connection of the handheld device 100 to other external devices. The interface unit 140b may include various ports (e.g., an audio I/O port and a video I/O port) for connecting with external devices. The I/O unit 140c may input or output video information/signals, audio information/signals, data and/or information input by a user. The I/O unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.

For example, in the case of data communication, the I/O unit 140c may acquire information/signals (e.g., touch, text, voice, image, or video) input by a user, and the acquired information/signals may be stored in the storage unit 130. The communication unit 110 may convert information/signals stored in the memory into radio signals and transmit the converted radio signals directly to other wireless devices or to the BS. The communication unit 110 may receive a radio signal from other wireless devices or BSs and then restore the received radio signal to original information/signals. The restored information/signal may be stored in the storage unit 130 and may be output as various types (e.g., text, voice, image, video, or tactile) through the I/O unit 140.

Fig. 23 shows a vehicle or autonomous vehicle according to an embodiment of the present disclosure. The vehicle or the autonomous vehicle may be realized by a mobile robot, an automobile, a train, a manned/unmanned Aerial Vehicle (AV), a ship, or the like.

Referring to fig. 23, the vehicle or autonomous vehicle (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a driving unit (140a), a power supply unit (140b), a sensor unit (140c), and an autonomous driving unit (140 d). The antenna unit (108) may be configured as part of a communication unit (110). Blocks 110/130/140a through 140d respectively correspond to block 110/130/140 of fig. 19.

The communication unit 110 may transmit and receive signals (e.g., data signals and control signals) to and from external devices such as other vehicles, BSs (e.g., gnbs and road side units), and servers. The control unit 120 may perform various operations by controlling elements of the vehicle or the autonomous driving vehicle 100. The control unit 120 may include an Electronic Control Unit (ECU). The drive unit 140a may cause the vehicle or the autonomously driven vehicle 100 to travel on the road. The driving unit 140a may include an engine, a motor, a transmission system, wheels, brakes, a steering device, and the like. The power supply unit 140b may supply power to the vehicle or the autonomous driving vehicle 100, and may include a wired/wireless charging circuit, a battery, and the like. The sensor unit 140c may acquire a vehicle state, external environment information, user information, and the like. The sensor unit 140c may include an Inertial Measurement Unit (IMU) sensor, a collision sensor, a wheel sensor, a speed sensor, a grade sensor, a weight sensor, a heading sensor, a position module, a vehicle forward/backward sensor, a battery sensor, a fuel sensor, a tire sensor, a steering sensor, a temperature sensor, a humidity sensor, an ultrasonic sensor, an illumination sensor, a pedal position sensor, and the like. The autonomous driving unit 140d may implement a technique for maintaining a lane in which the vehicle travels, a technique for automatically adjusting a speed (e.g., adaptive cruise control), a technique for autonomously driving along a determined path, a technique for driving by automatically setting a path in a case where a destination is set, and the like.

For example, the communication unit 110 may receive map data, traffic information data, and the like from an external server. The autonomous driving unit 140d may generate an autonomous driving path and a driving plan from the acquired data. The control unit 120 may control the drive unit 140a such that the vehicle or the autonomously driven vehicle 100 may move along an autonomous driving path according to a driving plan (e.g., speed/direction control). In the middle of autonomous driving, the communication unit 110 may acquire the latest traffic information data from an external server irregularly/periodically and acquire surrounding traffic information data from neighboring vehicles. In the middle of autonomous driving, the sensor unit 140c may acquire vehicle state and/or surrounding environment information. The autonomous driving unit 140d may update the autonomous driving path and the driving plan based on the newly acquired data/information. The communication unit 110 may transmit information about the vehicle location, the autonomous driving path, and/or the driving plan to an external server. The external server may predict traffic information data using AI technology or the like based on information collected from the vehicle or the autonomously driven vehicle, and provide the predicted traffic information data to the vehicle or the autonomously driven vehicle.

The scope of the present disclosure may be indicated by the appended claims, and it should be understood that all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

The claims in this specification may be combined in various ways. For example, technical features in the method claims of the present specification may be combined to be implemented or performed in a device, and technical features in the device claims may be combined to be implemented or performed in a method. Furthermore, the technical features in the method claim(s) and the device claim(s) may be combined to be implemented or performed in a device. Furthermore, technical features in the method claim(s) and the device claim(s) may be combined to be implemented or performed in a method.