WO2020175955A1

WO2020175955A1 - Method for transmitting or receiving signal in wireless communication system, and device for performing same

Info

Publication number: WO2020175955A1
Application number: PCT/KR2020/002889
Authority: WO
Inventors: 박기원; 서한별; 이종율
Original assignee: 엘지전자 주식회사
Priority date: 2019-02-28
Filing date: 2020-02-28
Publication date: 2020-09-03

Abstract

An embodiment relates to a signal transmission/reception method for a first terminal in a wireless communication system, the method comprising the steps of: receiving a physical sidelink control channel (PSCCH) including sidelink control information (SCI) from a second terminal; receiving a physical sidelink shared channel (PSSCH) including a reference signal on the basis of the SCI from the second terminal; measuring a channel state on the basis of the reference signal; and transmitting radio link control (RLC) layer information to the second terminal, wherein on the basis of a result of the measurement showing that the channel state has a value equal to or smaller than a threshold value, the RLC layer information includes information for triggering of an RLC automatic repeat request (ARQ) operation.

Description

2020/175955 1»（：1^1{2020/002889 Specification

Name of the invention: Method for transmitting and receiving signals in a wireless communication system and apparatus for performing the same

Technical field

[1] The following description is for a wireless communication system, and more specifically, a method and apparatus for triggering an RLC ARQ operation based on a channel state.

Background

[2] Wireless communication systems are widely deployed to provide various types of communication services such as voice and data. In general, wireless communication systems share available system resources (bandwidth, transmission power, etc.) It is a multiple access system capable of supporting communication. Examples of multiple access systems include a code division multiple access (CDMA) system, a frequency division multiple access (FDMA) system, a time division multiple access (TDMA) system, and

OFDMA (orthogonal frequency division multiple access) system, SC-FDMA (single carrier frequency division multiple access) system, MC-FDMA (multi carrier frequency division multiple access) system, and the like.

[3] In the wireless communication system, various RAT (Radio Access Technologies) such as LTE, LTE-A, and WiFi are used, and 5G is also included here. The three main requirements areas of 5G are (1) Enhanced Mobile Broadband (eMBB) area, (2) Massive Machine Type Communication (mMTC) area, and (3) Ultra-reliability and low cost. It includes the field of Ultra-reliable and Low Latency Communications (URLLC); some use cases may require multiple domains for optimization, while others use only one key performance indicator (Key Performance). Indicator, KPI) can only be focused. 5G is to support these different use cases in a flexible and reliable way.

[4] eMBB far surpasses basic mobile Internet access, covers rich bi-directional operations, media and entertainment applications in the cloud or augmented reality. Data is one of the core drivers of 5G, and is the first dedicated voice service in the 5G era. May not be able to see In 5G, it is expected that voice will be treated as an application simply using the data connection provided by the communication system. The main reasons for increased traffic volume are the increase in content size and the increase in the number of applications that require high data transfer rates. Streaming services (audio and video), interactive video and mobile Internet connections allow more devices to connect to the Internet. As they become more widely used, many of these applications require always-on connectivity to push real-time information and notifications to users. Cloud storage and applications are on mobile communication platforms. 2020/175955 1»（：1^1{2020/002889 It is increasing rapidly, it can be applied to both work and entertainment. And cloud storage is a special use case that drives the growth of the uplink data rate. 5G is also used for remote work in the cloud, and requires much lower end-to-end latency to maintain a good user experience when tactile interfaces are used; entertainment e.g. cloud gaming and Video streaming is another key factor in increasing the demand for mobile broadband capabilities. Entertainment is essential for smartphones and tablets anywhere, including high mobility environments such as trains, cars, and airplanes. Another use case is entertainment. For augmented reality and information retrieval, where augmented reality requires very low latency and an instantaneous amount of data.

[5] Also, one of the most anticipated 5G use cases is embedded in all fields.

It's about the ability to connect sensors seamlessly, i.e. mMTC. By 2020, the number of potential IoT devices is expected to reach 24.4 billion. Industrial IoT is one of the areas where 5G plays a major role in enabling smart cities, asset tracking, smart utilities, agriculture and security infrastructure. Is one.

[6] URLLC includes new services that will change the industry with ultra-reliable/low-latency links such as remote control of key infrastructure and self-driving vehicles. The level of reliability and delay is Essential for smart grid control, industrial automation, robotics, and drone control and adjustment.

[7] Next, we look at a number of usage examples in more detail.

[8] 5G can complement FTTH (fiber-to-the-home) and cable-based broadband (or DOCSIS) as a means of providing streams rated from hundreds of megabits per second to gigabits per second. These fast speeds are virtual reality. In addition to over-augmented reality, TVs are delivered with a resolution of 4K or higher (6K, 8K and higher). Virtual Reality (VR) and Augmented Reality (AR) applications include almost immersive sports events. Certain applications may require special network settings, e.g. for VR games, game companies In order to minimize these delays, the core server may need to be integrated with the network operator's edge network server.

[9] Automotive is expected to be an important new engine for 5G, with many use cases for mobile communications to vehicles. For example, entertainment for passengers is simultaneously high capacity and high mobility mobile. They demand broadband because future users will continue to expect high-quality connections regardless of their location and speed. Another example of use in the automotive sector is augmented reality.

It is a dashboard, which is superimposed on top of what the driver is looking through the front window and displays information that identifies objects in the dark and tells the driver about the distance and movement of the objects. In the future, the wireless module will enable communication between vehicles, Exchange of information between the vehicle and the supporting infrastructure and

Information between devices (e.g. devices carried by a pedestrian) 2020/175955 1»（：1^1{2020/002889 Enables the exchange. The safety system allows the driver to lower the risk of accidents by guiding alternative courses of action so that the driver can drive more safely. The next step is It will be either remotely controlled or a self-driven vehicle, which requires very reliable and very fast communication between different self-driving vehicles and between the vehicle and the infrastructure. In the future, the self-driving vehicle will all drive itself. The activities will be carried out, and the driver will focus only on traffic abnormalities that the vehicle itself cannot identify. The technical requirements of self-driving vehicles require ultra-low latency and ultra-fast reliability to increase traffic safety to levels unattainable to humans. do.

[10] Smart cities and smart homes, referred to as smart society, will be embedded with high-density wireless sensor networks. Distributed networks of intelligent sensors will identify the cost of the city or home and the conditions for energy-efficient maintenance. Similar Settings can be done for each home. Temperature sensors, window and heating controllers, burglar alarms and appliances are all wirelessly connected. Many of these sensors typically have low data rates, low power and low cost. However, For example, real-time HD video may be required on certain types of devices for surveillance.

[11] The consumption and distribution of energy, including heat or gas, is highly decentralized, requiring automated control of distributed sensor networks. Smart grids use digital information and communication technologies to collect information and act accordingly. Interconnecting sensors This information can include the behavior of suppliers and consumers, allowing smart grids to improve the distribution of fuels such as electricity in an efficient, reliable, economical, sustainable and automated way. The smart grid can also be viewed as another sensor network with low latency.

[12] The health sector has a number of applications that can benefit from mobile communications. Communication systems can support remote care providing clinical care from remote locations. This helps to reduce barriers to distance. It can improve access to medical services that are not continuously available in remote rural areas, which are also used to save lives in critical care and emergency situations. Mobile communication-based wireless sensor networks can provide sensors and remote monitoring of parameters such as heart rate and blood pressure.

[13] Wireless and mobile communications are becoming increasingly important in industrial applications. Wiring is expensive to install and maintain. Therefore, the possibility of replacing cables with wireless links that can be reconfigured is an attractive opportunity for many industries. However, to achieve this. What is required is that the wireless connection operates with a delay, reliability and capacity similar to that of the cable, and its management will be simplified. Low latency and very low error rate are new requirements that need to be connected to 5G.

[14] Logistics and freight tracking use a location-based information system.

It is an important use case for mobile communications, which enables inventory and package tracking anywhere by using Logistics and Cargo Tracking. 2020/175955 1»（：1/10公020/002889 Typically requires a low data rate, but requires a wide range and reliable location information.

[15] A wireless communication system is a multiple access system that supports communication with multiple users by sharing available system resources (eg, bandwidth, transmission power, etc.). An example of a multiple access system is a CDMA (code code). division multiple access) system, frequency division multiple access (FDMA) system, time division multiple access (TDMA) system, orthogonal frequency division multiple access (OFDMA) system, single carrier frequency division multiple access (SC-FDMA) system, MC-FDMA (multi carrier frequency division multiple access) system.

[16] Sidelink (SL) is a communication method that directly exchanges voice or data between terminals without going through a base station (BS) by establishing a direct link between terminals (User Equipment, UE). Say. SL is being considered as a solution to the burden of base stations due to the rapidly increasing data traffic.

[17] V2X (vehicle-to-everything) refers to a communication technology that exchanges information with other vehicles, pedestrians, and objects on which infrastructure is built through wired/wireless communication. V2X

It can be classified into four types: vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-network (V2N), and vehicle-to-pedestrian (V2P). V2X communication can be provided through PC5 interface and/or Uu interface.

[18] On the other hand, as more and more communication devices are demanding higher communication capacity,

The need for mobile broadband communication, which is improved compared to the existing radio access technology (RAT), is emerging. Accordingly, a communication system that considers a service or terminal that is sensitive to reliability and latency. This is being discussed, and the next-generation wireless access technology considering improved mobile broadband communication, Massive MTC (Machine Type Communication), URLLC (Ultra-Reliable and Low Latency Communication), etc. will be introduced as a new RAT (new radio access technology) or NR (new radio). ). V2X (vehicle-to-everything) communication can also be supported in NR.

[19] Figure 1 shows V2X communication based on RAT before NR and V2X communication based on NR.

This is a drawing for comparison and explanation.

[2 is related to V2X communication, in RAT before NR, BSM (Basic Safety Message),

Based on V2X messages such as CAM (Cooperative Awareness Message) and DENM (Decentralized Environmental Notification Message), a method of providing safety service was mainly discussed. V2X messages can include location information, dynamic information, property information, etc. For example, the terminal

CAM of the message (periodic message) type and/or DENM of the event triggered message type can be transmitted to other terminals.

[21] For example, the CAM provides information on the dynamic status of the vehicle such as direction and speed, and 2020/175955 1»（：1^1{2020/002889 It can include basic vehicle information such as vehicle static data, exterior lighting condition, route history, etc. For example, the terminal can broadcast CAM, and the CAM latency ) May be less than 100 ms. For example, in the event of a vehicle breakdown or accident, the terminal can generate a DENM and transmit it to another terminal, for example, within the transmission range of the terminal. All vehicles can receive CAM and/or DENM, in which case DENM may have a higher priority than CAM.

[22] Afterwards, various V2X scenarios related to V2X communication were presented in NR.

For example, various V2X scenarios could include vehicle platooning, advanced driving, extended sensors, remote driving, and more.

[23] For example, based on vehicle platooning, vehicles can dynamically form groups and move together. For example, to perform platoon operations based on vehicle platooning, the above Vehicles in a group can receive periodic data from leading vehicles, for example, vehicles in the group can use periodic data to reduce or widen the gap between vehicles.

[24] For example, on the basis of improved driving, vehicles can be semi-automated or fully automated. For example, each vehicle may be located on a local sensor of a nearby vehicle and/or a nearby logical entity. Based on the acquired data, trajectories or maneuvers can be adjusted. In addition, for example, each vehicle can mutually share a driving intention with nearby vehicles.

[25] For example, based on extended sensors, raw data or processed data acquired through local sensors, or live video data is a vehicle, a logical entity, a pedestrian They can be interchanged between their terminals and/or the V2X application server, so, for example, a vehicle can perceive an improved environment than it can detect using its own sensors.

[26] Based on remote driving, for example, for people who cannot drive or for remote vehicles located in hazardous environments, the remote driver or V2X application can operate or control the remote vehicle. For example, public transport department If the route can be predicted together, cloud computing-based driving can be used for the operation or control of the remote vehicle. In addition, for example, access to a cloud-based back-end service platform. Can be considered for remote driving.

[27] Meanwhile, vehicle planing, improved driving, extended sensors, remote driving, etc.

A plan for specifying service requirements for various V2X scenarios is being discussed in V2X communication based on NR.

Detailed description of the invention

Technical task 2020/175955 1»（：1^1{2020/002889

[28] The technical task of the embodiment(s) is that the RLC ARQ operation is performed only when necessary depending on whether a specific condition is satisfied.

[29] The technical tasks to be achieved in the embodiment(s) are the technical tasks mentioned above.

Not limited to the tasks, and other technical tasks not mentioned will be clearly understood by those of ordinary skill in the technical field to which the example(s) belongs from the following description.

Problem solving means

[3] In this embodiment, a method for transmitting and receiving signals for a first terminal in a wireless communication system

In, including SCI (Sidelink Control Information) from the second terminal

Receiving a physical sidelink control channel (PSCCH); receiving a PSSCH (Physical Sidelink Shared Channel) including a reference signal based on the SCI from the second terminal; performing channel state measurement based on the reference signal And transmitting information of the RLC (Radio Link Control) layer to the second terminal; including, but based on that the result of the channel state measurement is less than or equal to a threshold, the RLC verification information is RLC ARQ ( Automatic Repeat reQuest) is a method, including information that triggers an action.

[31] In one embodiment, in a wireless communication system, at least one processor; and the at least one processor, which can be operably connected to the at least one processor, and stores instructions for performing the operations by the at least one processor when executed. Including at least one computer memory, wherein the operations include: receiving a PSCCH (Physical Sidelink Control Channel) including SCI (Sidelink Control Information) from a second terminal; a reference signal from the second terminal based on the SCI Receiving a PSSCH (Physical Sidelink Shared Channel) comprising; performing channel state measurement based on the reference signal; and transmitting information of a Radio Link Control (RLC) layer to the second terminal; Including, but based on the result of the channel state measurement is less than the threshold value, the information of the RLC layer is RLC

It is a first terminal containing information for triggering an automatic repeat request (ARQ) operation.

[32] One embodiment, when executed by at least one processor, at least one

In a computer-readable storage medium storing at least one computer program containing instructions for causing a processor to perform operations for the UE, the operations include Sidelink Control Information (SCI) from the second terminal.

Receiving a physical sidelink control channel (PSCCH); receiving a PSSCH (Physical Sidelink Shared Channel) including a reference signal based on the SCI from the second terminal; performing channel state measurement based on the reference signal And transmitting information of the RLC (Radio Link Control) layer to the second terminal; including, but the result of the channel state measurement is less than or equal to a threshold value. Based on 2020/175955 1» (: 1^1{2020/002889), the RLC inheritance information is a storage medium containing information for triggering an RLC Automatic Repeat Request (ARQ) operation.

[33] Based on the fact that the result of the channel state measurement is less than the threshold value, ACK (Acknowledgement) for the RLC verification information from the second terminal or

It may further include a step of receiving NACK (Negative-ACK) information.

[34] The information of the RLC layer may be an RLC Protocol Data Unit (PDU).

[35] The RLC PDU may include an RLC header, and the RLC header may include information for triggering the RLC ARQ operation.

[36] The RLC header may include a polling bit of 1 bit, and based on that the result of the channel state measurement is less than or equal to the threshold value, the polling bit is set to 1, and the result of the channel state measurement exceeds the threshold value. Based on being, the polling bit may be set to 0.

Based on the result of the channel state measurement exceeding the threshold value, the information of the RLC layer may include information for stopping the RLC ARQ operation.

[38] The step of performing a HARQ (Hybrid-ARQ) operation on the PSSCH may be further included.

[39] The step of determining whether the result of the channel state measurement is less than or equal to the threshold value may be further included.

[4] This first terminal may be another terminal, a terminal related to an autonomous vehicle, or a terminal that communicates with at least one of a base station or a network.

Effects of the Invention

[41] According to one embodiment, the RLC ARQ operation is performed only when necessary.

The signaling overhead of the sidelink terminal can be reduced and wireless resources can be efficiently used.

[42] The effects that can be obtained in the example(s) are not limited to the effects mentioned above.

In addition, other effects not mentioned can be clearly understood by those of ordinary skill in the technical field to which the embodiment(s) belongs from the following description.

Brief description of the drawing

[43] The drawings attached to this specification are intended to provide an understanding of the embodiment(s).

It is intended to show various embodiments and explain the principles together with the description of the specification.

1 shows V2X communication based on RAT prior to NR and V2X communication based on NR.

This is a drawing for comparison and explanation.

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

3 shows a radio protocol architecture for a user plane and a control plane according to an embodiment of the present disclosure. 2020/175955 1»（：1^1{2020/002889

4 shows a structure of an NR system according to an embodiment of the present disclosure.

[48] FIG. 5 illustrates functional division between NG-RAN and 5GC according to an embodiment of the present disclosure.

Show.

6 shows a structure of an NR radio frame to which the embodiment(s) can be applied.

[5] Fig. 7 shows a slot structure of an NR frame according to an embodiment of the present disclosure.

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

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

10 shows a structure of an S-SSB when the CP type is NCP according to an embodiment of the present disclosure.

11 shows a structure of an S-SSB when the CP type is ECP according to an embodiment of the present disclosure.

12 shows a terminal performing V2X or SL communication according to an embodiment of the present disclosure.

13 shows a resource unit for V2X or SL communication according to an embodiment of the present disclosure.

14 shows a procedure for a terminal to perform V2X or SL communication according to a transmission mode according to an embodiment of the present disclosure.

15 shows three cast types according to an embodiment of the present disclosure.

16 shows a terminal including an LTE module and an NR module according to an embodiment of the present disclosure.

[6] Fig. 17 shows a transmission procedure of an RRC message according to an implementation of the present disclosure.

18 shows a one-way UE capability delivery according to an embodiment of the present disclosure.

19 shows a bidirectional UE capability delivery according to an embodiment of the present disclosure.

[63] Figure 20 shows a bidirectional AS layer setting according to an embodiment of the present disclosure.

21 shows the physical layer processing of the transmission side according to an embodiment of the present disclosure.

22 shows the physical layer processing of the receiving side according to an embodiment of the present disclosure.

[66] Figure 23 is, according to an embodiment of the present disclosure, 5G capable of positioning for a UE connected to a Next Generation-Radio Access Network (NG-RAN) or E-UTRAN

It shows an example of the architecture in the system.

24 shows an implementation example of a network for measuring the location of a UE according to an embodiment of the present disclosure.

25 is an LPP (LTE Positioning) between the LMF and the UE according to an embodiment of the present disclosure

Protocol) shows an example of a protocol layer used to support message transmission.

26 is a diagram of a protocol layer used to support NRPPa (NR Positioning Protocol A) PDU transmission between LMF and NG-RAN nodes according to an embodiment of the present disclosure. 2020/175955 1»（：1^1{2020/002889 gives an example.

Fig. 27 is an OTDOA (Observed Time Difference Of) according to an embodiment of the present disclosure.

This is a drawing to explain the positioning method.

R1] Figure 28 is a synchronization source of V2X according to an embodiment of the present disclosure (synchronization

source) or synchronization reference.

2] Fig. 29 shows a plurality of BWPs according to an embodiment of the present disclosure.

3] Fig. 30 shows a BWP according to an embodiment of the present disclosure.

4] Fig. 31 shows a resource unit for CBR measurement according to an embodiment of the present disclosure. 5] This is an example of a case where the PSCCH and PSSCH of FIG. 32 are multiplexed.

[76] Figure 33 shows a physical layer processing for SL according to an embodiment of the present disclosure.

Show.

34 to 37 are views for explaining the embodiment(s).

8] Figures 38 to 47 illustrate various devices to which the embodiment(s) can be applied.

It is a drawing.

Best mode for carrying out the invention

[79] In various embodiments of the present disclosure, “/” and “,” are meant to represent “and/or”

It should be interpreted. For example, “A/B” can mean “A and/or B”. Further, “A, B” can mean “A and/or B”. Further, “A” /B/C" can mean "at least one of A, B and/or C". Further, "A, B," can mean "at least one of A, B and/or C".

[8] In various embodiments of the present disclosure, "or" is meant to represent "and/or"

For example, “A or” may include “only A”, “only B”, and/or “both A and B.” In other words, “or” is “additionally or alternatively” It should be interpreted as representing “to”.

[81] The following technologies are CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), SC-FDMA (single carrier frequency division multiple access) ) Can be used in various wireless communication systems. CDMA can be implemented with a radio technology such as universal terrestrial radio access (UTRA) or CDMA2000. TDMA can be implemented with wireless technologies such as global system for mobile communications (GSM)/general packet radio service (GPRS)/enhanced data rates for GSM evolution (EDGE). OFDMA can be implemented with wireless technologies such as IEEE (institute of electrical and electronics engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (evolved UTRA). IEEE 802.16m is an evolution of IEEE 802.16e, and backward compatibility with IEEE 802.16e-based systems (backward compatibility)

compatibility). UTRA is part of a universal mobile telecommunications system (UMTS). 3rd generation partnership project (3GPP) long term (LTE) 2020/175955 1» (：1^1(2020/002889 evolution) is the E-UTRA (evolved-UMT S terrestrial radio access)

As a part of E-UMTS (evolved UMTS), OFDMA is employed in the downlink and SC-FDMA is employed in the uplink. LTE-A (advanced) is the evolution of 3GPP LTE.

[82] 5G NR is the successor technology of LTE-A, and has features such as high performance, low latency, and high availability.

Eggplant is a new clean-slate type mobile communication system. 5G NR ranges from low frequency bands of less than lGHz to mid-frequency bands of miiz-LOGPiz and over 24GHz.

All available spectrum resources such as high frequency (millimeter wave) bands can be utilized.

[83] For clarity, LTE-A or 5G NR is mainly described.

The technical idea according to one embodiment of the disclosure is not limited thereto.

E-UTRAN (Evolved-UMTS Terrestrial Radio Access Network), or LTE (Long Term Evolution) / LTE-A system may be called.

[85] Referring to FIG. 2, the E-UTRAN includes a base station 20 that provides a control plane and a user plane to the terminal 10. The terminal 10 is fixed or mobile. , And can be called in other terms such as MS (Mobile Station), UT (User Terminal), SS (Subscriber Station), MT (Mobile Terminal), wireless device, etc. Base station 20 is the terminal 10 ) Refers to a fixed station that communicates with, and can be called in other terms, such as eNB (evolved-NodeB), BTS (Base Transceiver System), and Access Point.

[86] The base stations 20 can be connected to each other through the X2 interface. The base station 20 is an EPC (Evolved Packet Core, 30) through the S1 interface, and more specifically, the Mobility Management Entity (MME) through the S 1-MME. ) And S1-U through S-GW (Serving Gateway).

[87] The EPC 30 is composed of MME, S-GW and P-GW (Packet Data Network-Gateway).

The MME has information about the terminal's access information or the terminal's capabilities, and this information is mainly used to manage the mobility of the terminal. S-GW is a gateway with E-UTRAN as an endpoint, and P-GW is a gateway with PDN (Packet Date Network) as an endpoint.

[88] The layers of the radio interface protocol between the terminal and the network are L1 (No. 1 Inheritance), L2 (layer 2), and L3 (layer 3), among which, the physical inheritance belonging to the first layer provides an information transfer service using a physical channel The RRC (Radio Resource Control) layer located in the third line plays the role of controlling radio resources between the terminal and the network. For this purpose, the RRC layer exchanges RRC messages between the terminal and the base station.

[89] Fig. 3(a) is a wireless device for a user plane according to an embodiment of the present disclosure.

Represents the radio protocol architecture. 2020/175955 1»（：1^1{2020/002889

[9] Fig. 3(b) shows a wireless protocol structure for a control plane according to an embodiment of the present disclosure. The user plane is a protocol stack for transmitting user data, and the control plane is It is a protocol stack for transmission of control signals.

3(a) and A3, the physical layer provides an information transmission service to an upper layer using a physical channel. The physical layer is a higher layer, which is a higher layer.

It is connected to the MAC (Medium Access Control) system through a transport channel. Data moves between the MAC layer and the physical layer through the transport channel. The transport channel transmits data through a wireless interface, with how and with what characteristics. It is classified according to whether or not.

[92] Data is transferred through a physical channel between different physical layers, i.e. between the physical layers of the transmitter and the receiver. The physical channel can be modulated by the OFDM (Orthogonal Frequency Division Multiplexing) method, and time and frequency are radio resources. Use it as.

[93] The MAC layer provides a service to the upper layer, the radio link control (RLC) layer, through a logical channel. The MAC layer provides a mapping function from a plurality of logical channels to a plurality of transport channels, and the MAC layer provides a logical channel multiplexing function by mapping from a plurality of logical channels to a single transmission channel. The MAC layer provides a data transmission service on a logical channel.

[94] RLC inheritance is the concatenation of RLC Serving Data Unit (SDU),

Segmentation and reassembly are performed To ensure various QoS (Quality of Service) required by Radio Bearer (RB), RLC layer is in Transparent Mode (TM), Non-Confirmed Mode It provides three operating modes: (Unacknowledged Mode, UM) and Acknowledged Mode (AM). AM RLC provides error correction through automatic repeat request (ARQ).

[95] The Radio Resource Control (RRC) layer is defined only in the control plane. The RRC layer is in charge of controlling the logical channels, transport channels and physical channels in relation to the configuration, re-configuration, and release of radio bearers. RB refers to the logical path provided by the first layer (physical layer or PHY layer) and the second layer (MAC verification, RLC verification, PDCP (Packet Data Convergence Protocol) verification) for data transfer between the terminal and the network.

[96] The function of the PDCP layer in the user plane is the transmission of user data and the header

Includes header compression and ciphering The functions of the PDCP layer in the control plane include the transfer of control plane data and encryption/integrity protection.

[97] Setting the RB means the process of defining the characteristics of the wireless protocol layer and channel to provide a specific service, and setting specific parameters and operation methods for each. RB can be further divided into two types, SRB (Signaling Radio Bearer) and DRB (Data Radio Bearer). SRB sends RRC messages in the control plane. 2020/175955 1»（：1^1{2020/002889 It is used as a transmission path, and DRB is used as a path for transmitting user data in the user plane.

[98] RRC connection between the RRC layer of the terminal and the RRC layer of the E-UTRAN (RRC

connection) is established, the terminal is in RRC_CONNECTED state, otherwise it is in RRCJDLE state. In the case of NR, the RRCJNACTIVE state is additionally defined, and the terminal in the RRCJNACTIVE state can release the connection with the base station while maintaining the connection with the core network.

[99] Downlink transmission channel for data transmission from network to terminal

In addition to the BCH (Broadcast Channel) that transmits information, there is a downlink SCH (Shared Channel) that transmits user traffic or control messages. In the case of downlink multicast or broadcast service traffic or control messages, the downlink SCH is used. On the other hand, the uplink transmission channel that transmits data from the terminal to the network is the RACH (Random Access Channel) that transmits the initial control message and other user traffic. There is an uplink shared channel (SCH) that transmits or control messages.

[100] A logical channel that is above the transmission channel and is mapped to the transmission channel (Logical

Channel) includes BCCH (Broadcast Control Channel), PCCH (Paging Control Channel), CCCH (Common Control Channel), MCCH (Multicast Control Channel),

There are MTCH (Multicast Traffic Channel).

[101] A physical channel consists of several OFDM symbols in the time domain and several sub-carriers in the frequency domain.

A sub-frame is composed of a plurality of OFDM symbols in a time domain. A resource block is a resource allocation unit, and is composed of a plurality of OFDM symbols and a plurality of sub-carriers. In addition, each subframe can use specific government carriers of specific OFDM symbols (eg, the first OFDM symbol) of the corresponding subframe for the PDCCH (Physical Downlink Control Channel), that is, the L1/L2 control channel. TTI (Transmission Time Interval) is a unit time of subframe transmission.

[103] Referring to FIG. 4, a Next Generation Radio Access Network (NG-RAN) may include a next generation-Node B (gNB) and/or an eNB that provides a terminal with a user plane and a control plane protocol termination. In FIG. 4, a case where only gNB is included is illustrated. The gNB and the eNB are connected to each other through an Xn interface. The gNB and the eNB are connected to the 5th generation core network (5G Core Network: 5GC) through the NG interface. More specifically, the access and mobility management function (AMF) is connected through the NG-C interface, and the UPF (user plane function) is connected through the NG-U interface.

5 illustrates functional division between NG-RAN and 5GC according to an embodiment of the present disclosure. 2020/175955 1» (:1^1{2020/002889 indicates.

[105] Referring to Figure 5, the gNB is a wireless resource management (Inter Cell RRM), a wireless

Bearer management (RB control), connection mobility control (Connection Mobility Control), radio admission control (Radio Admission Control), immediate setting and provision (Measurement configuration & Provision), dynamic resource allocation (dynamic resource allocation), etc. Function can be provided. AMF can provide functions such as NAS (Non Access Stratum) security and idle state mobility processing. UPF can provide functions such as mobility anchoring and PDU (Protocol Data Unit) processing. SMF(Session Management

Function) can provide functions such as terminal IP (Internet Protocol) address allocation and PDU session control.

6 shows the structure of an NR wireless frame to which the present invention can be applied.

[107] Referring to FIG. 6, radio frames are transmitted in uplink and downlink transmission in NR.

The wireless frame has a length of Wms, and two 5ms

Can be defined as half-frame (HF) Half-frame can contain 5 1ms subframes (Subframe, SF) Subframe can be divided into one or more slots, and the number of slots in the subframe Is subcarrier

It can be determined according to the interval (Subcarrier Spacing, SCS). Each slot can contain 12 or 14 OFDM(A) symbols according to CP (cyclic prefix).

[108] When normal CP (normal CP) is used, each slot can contain 14 symbols. When extended CP is used, each slot may include 12 symbols, where the symbol may include an OFDM symbol (or CP-OFDM symbol), an SC-FDMA symbol (or DFT-s-OFDM symbol). have.

[109] Table 1 below shows the SCS setting (according to the

Number ( _N ^slot ), number of slots per frame (

¹ symbol v/) and the number of slots per subframe (slot

subframe， is shown.

丄、 slot

[11] [Table 1]

[111] Table 2 shows the number of symbols per slot and per frame according to 808 when extension 0 ⁵ is used. 2020/175955 1»(：1^1{2020/002889 Shows the number of slots and the number of slots per subframe.

[112] [Table 2]

[113] In the NR system, OFDM(A) between a plurality of cells merged into one terminal

Numerology (e.g., SCS, CP length, etc.) can be set differently; accordingly, a time resource consisting of the same number of symbols (e.g., subframe, slot or

TTI) (for convenience, the (absolute time) section of (collectively referred to as TU (Time Unit)) may be set differently between the merged cells.

[114] In NR, a number of numerology or SCS can be supported to support various 5G services. For example, if the SCS is 15 kHz, a wide area in traditional cellular bands is supported. If the SCS is 30kHz/60mz, dense-urban, lower latency and wider carrier bandwidth can be supported. If the SCS is 60kHz or higher, a bandwidth greater than 24.25GPiz can be supported to overcome the phase noise.

[115] NR frequency band (frequency band) is two types of frequency range (frequency

The frequency range of the above two types can be FR1 and FR2. The numerical value of the frequency range can be changed, for example, the frequency range of the above two types can be as shown in Table 3 below. Among the frequency ranges used in the NR system, FR1 can mean “sub 6GHz range” and FR2 can mean “above 6GHz range” and can be called millimeter wave (mmW).

[116] [Table 3]

[117] As described above, the value of the frequency range of the NR system can be changed. For example, FR1 may include a band of 410MHz to 25MHz as shown in Table 4 below. In other words, FR1 may include a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher. For example, a frequency band of 6 GHz (or 5850, 5900, 5925 MHz, etc.) or higher included in FR1 is an unlicensed band ( Unlicensed bands can be used for a variety of purposes, e.g. for communication for vehicles (e.g. autonomous driving).

[118] [Table 4]

2020/175955 1»（：1^1{2020/002889

7 shows a slot structure of an NR frame according to an embodiment of the present disclosure.

Referring to Fig. 7, a slot includes a plurality of symbols in the time domain. For example, in the case of a normal simulation, one slot includes 14 symbols, but in the case of an extended CP, one slot includes 12 symbols. Or, for normal CP, one slot is

It contains 7 symbols, but in the case of an extended CP, one slot can contain 6 symbols.

[121] A carrier includes a plurality of subcarriers in the frequency domain. RB(Resource

Block) can be defined as a plurality of (eg, 12) consecutive subcarriers in the frequency domain. BWP (Bandwidth Part) can be defined as a plurality of consecutive (P)RBs ((Physical) Resource Blocks) in the frequency domain, and one numerology (e.g., SCS,

CP length, etc.) A carrier can contain up to N (e.g. 5) BWPs. Data communication can be carried out through an active BWP. Each element is a resource element in the resource grid. It can be referred to as (Resource Element, RE), and one complex symbol can be mapped.

[122] On the other hand, a terminal-to-terminal wireless interface or a terminal-to-network wireless interface

The interface may be composed of the L1 layer, the L2 layer, and the L3 layer. In various embodiments of the present disclosure, the L1 layer may refer to the physical layer. Also, for example, the L2 layer is the MAC layer, the RLC layer. , PDCP layer, and SDAP layer can mean at least one layer. Also, for example, L3 layer can mean RRC layer.

[123] Hereinafter, V2X or SL (sidelink) communication will be described.

8 shows a radio protocol architecture for SL communication according to an embodiment of the present disclosure. Specifically, FIG. 8A shows a user plane protocol stack of LTE, and FIG. 8 (B) of shows the LTE control plane protocol stack.

9 shows a radio protocol architecture for SL communication according to an embodiment of the present disclosure. Specifically, FIG. 9A shows a user plane protocol stack of NR, and FIG. 9 (B) of the NR shows the control plane protocol stack.

[126] Hereinafter, Sidelink Synchronization Signal (SLSS) and synchronization information! Explain about it.

[127] SLSS is an SL-specific sequence, and may include PSSS (Primary Sidelink Synchronization Signal) and SSSS (Secondary Sidelink Synchronization Signal). The PSSS can be referred to as S-PSS (Sidelink Primary Synchronization Signal). , The SSSS may be referred to as S-SSS (Sidelink Secondary Synchronization Signal). F] For example, length-127 M-sequences (leng- 127 M-sequences) may be used for S-PSS, and length -127 gold-sequences (length-127 Gold sequences) can be used for S-SSS, e.g. the terminal can use S-PSS to detect the initial signal and acquire synchronization For example, the terminal uses S-PSS and S-SSS. By using 2020/175955 1»（：1/10公020/002889, you can acquire detailed synchronization, and synchronously detect D.

[128] The PSBCH (Physical Sidelink Broadcast Channel) may be a (broadcast) channel through which basic (system) information that the terminal needs to know first before transmitting and receiving SL signals is transmitted. For example, the basic information is in SLSS. Related information, Duplex Mode (DM), TDD UL/DL (Time Division Duplex Uplink/Downlink) configuration, resource pool related information, SLSS related application type, subframe offset, broadcast information, etc. For example, for the evaluation of PSBCH performance, in NR V2X, the payload size of the PSBCH may be 56 bits including a 24-bit CRC.

[129] S-PSS, S-SSS, and PSBCH may be included in a block format supporting periodic transmission (eg, SL SS (Synchronization Signal)/PSBCH block, hereinafter S-SSB (Sidelink-Synchronization Signal Block)). The S-SSB may have the same neurology (i.e., SCS and CP length) as the PSCCH (Physical Sidelink Control Channel)/PSSCH (Physical Sidelink Shared Channel) in the carrier, and the transmission bandwidth is (pre-)set SL BWP. (Sidelink BWP), for example, the bandwidth of S-SSB could be 11 RB (Resource Block), for example, PSBCH could span 11 RBs. And, the frequency position of the S-SSB can be set (in advance). Therefore, the terminal does not need to perform hypothesis detection at the frequency to discover the S-SSB in the carrier.

[13 On the other hand, in the NR SL system, a plurality of neurons having different SCS and/or CP lengths can be supported. At this time, as the SCS increases, the length of the time resource for the transmission terminal to transmit the S-SSB is Accordingly, the coverage of the S-SSB can be reduced. Therefore, in order to ensure the coverage of the S-SSB, the transmitting terminal can be used for one or more S-SSBs within one S-SSB transmission period according to the SCS. SSBs can be transmitted to the receiving terminal; for example, the number of S-SSBs that the transmitting terminal transmits to the receiving terminal within one S-SSB transmission period is pre-configured (pre-configured) or configured in the transmitting terminal. For example, the S-SSB transmission period may be 160 ms. For example, for all SCS, an S-SSB transmission period of 160 ms may be supported.

[131] For example, if the SCS is 15 kHz in FR1, the transmitting terminal can transmit one or two S-SSBs to the receiving terminal within one S-SSB transmission period. For example, the SCS is FR1. In the case of 30kPiz, the transmitting terminal can transmit one or two S-SSBs to the receiving terminal within one S-SSB transmission period. For example, when the SCS is 60kHz in FR1, the transmitting terminal can transmit one 1 to the receiving terminal within the S-SSB transmission period,

You can transmit 2 or 4 S-SSBs.

[132] For example, if the SCS is 60kPiz in FR2, the transmitting terminal is 1, 2, 4, 8, 16 or 32 S-SSBs to the receiving terminal within one S-SSB transmission period. For example, if the SCS is 120 kHz in FR2, the transmitting terminal transmits one S-SSB. 2020/175955 1»（：1^1{2020/002889 It is possible to transmit 1, 2, 4, 8, 16, 32 or 64 S-SSBs to the receiving terminal within a period of 1^1{2020/002889.

On the other hand, when the SCS is 60 kHz, two types of CP can be supported. In addition, the structure of the S-SSB transmitted from the transmitting terminal to the receiving terminal may be different depending on the CP type. For example, the CP type. The type may be Normal CP (NCP) or Extended CP (ECP). Specifically, for example, when the CP type is NCP, the number of symbols for mapping PSBCH in the S-SSB transmitted by the transmitting terminal is 9 Or it can be 8. On the other hand, for example, if the CP type is ECP, in the S-SSB transmitted by the transmitting terminal

The number of symbols for mapping the PSBCH may be 7 or 6. For example, in the first symbol in the S-SSB transmitted by the transmitting terminal, the PSBCH may be mapped. For example, the receiving signal receiving the S-SSB may be mapped. The terminal is in the first symbol section of the S-SSB.

AGC (Automatic Gain Control) operation can be performed.

[135] For example, when the CP type is NCP, the structure of the S-SSB, that is, the order of the symbols in which the S-PSS, S-SSS and PSBCH are mapped in the S-SSB transmitted by the transmitting terminal is shown in FIG. Can refer to

11 shows the structure of an S-SSB when the CP type is ECP according to an embodiment of the present disclosure.

[137] For example, when the CP type is ECP, unlike FIG. 10, the number of symbols for which the transmitting terminal maps the PSBCH after the S-SSS in the S-SSB may be 6. Therefore, the CP type is Depending on whether it is NCP or ECP, the coverage of S-SSB may vary.

[138] Meanwhile, each SLSS may have a Sidelink Synchronization Identifier (SLSS ID).

[139] For example, in the case of LTE SL or LTE V2X, the value of SLSS ID may be defined based on a combination of two different S-PSS sequences and 168 different S-SSS sequences. For example, The number of SLSS IDs can be 336, for example, the value of SLSS ID can be any one of 0 to 335.

[14 For example, for NR SL or NR V2X, two different S-PSS sequences and

Based on a combination of 336 different S-SSS sequences, the value of the SLSS ID can be defined. For example, the number of SLSS IDs can be 672. For example, the value of SLSS ID can be any one of 0 to 671. For example, of two different S-PSSs, one S-PSS can be associated with in-coverage, and the other S-PSS can be associated with out-of-coverage. For example, SLSS IDs of 0 to 335 can be used in in-coverage, SLSS IDs of 336 to 6 can be used in out-coverage.

[141] On the other hand, the transmitting terminal needs to optimize the transmission power according to the characteristics of each signal constituting the S-SSB in order to improve the S-SSB reception performance of the receiving terminal. 2020/175955 1»（：1^1{For 2020/002889, according to the PAPR (Peak to Average Power Ratio) of each signal constituting the S-SSB, the transmitting terminal has the MPR (Maximum Power Reduction) for each signal. For example, if the PAPR value is different between the S-PSS and S-SSS constituting the S-SSB, in order to improve the S-SSB reception performance of the receiving terminal, the transmitting terminal is S- For the transmission of PSS and S-SSS, the optimum MPR value can be applied respectively. Also, for example, for the transmitting terminal to perform an amplification operation for each signal, a transition period can be applied. The transition period can protect the time required for the transmitting terminal amplifier of the transmitting terminal to perform the normal operation at the boundary where the transmission power of the transmitting terminal is different. For example, in the case of FR1, the transition period may be lOus. For example, for FR2, the transition section may be 5us. For example, the search window for the receiving terminal to detect the S-PSS may be 80 ms and/or 160 ms.

12 shows a terminal that performs V2X or SL communication according to an embodiment of the present disclosure.

12, in V2X or SL communication, the term terminal can mainly mean a user's terminal. However, when a network device such as a base station transmits and receives signals according to the communication method between the terminals, the base station also It may be considered a kind of terminal, for example, terminal 1 may be the first device 100, and terminal 2 may be the second device 200.

[144] For example, terminal 1 can select a resource unit corresponding to a particular resource within a resource pool, which means a set of resources. In addition, Terminal 1 can transmit an SL signal using the resource unit. For example, Terminal 2, which is a receiving terminal, can receive a resource pool in which terminal 1 can transmit signals, and detect the signal of terminal 1 in the resource pool. can do.

[145] Here, if terminal 1 is within the connection range of the base station, the base station can inform terminal 1 of the resource pool. On the other hand, when terminal 1 is outside the connection range of the base station, another terminal sends the resource pool to terminal 1 Or, terminal 1 can use the resource set in advance.

[146] In general, a resource pool can be composed of a plurality of resource units, and each terminal can select one or more resource units and use it for its own SL signal transmission.

13, the total frequency resources of the resource pool can be divided into NF, and the total time resources of the resource pool can be divided into NT. Accordingly, a total of NF * NT resource units can be defined in the resource pool. 13 shows an example in which the corresponding resource pool is repeated with a period of NT subframes.

As shown in Fig. 13, one resource unit (for example, Unit #0) may be repeatedly displayed periodically. Or, in the time or frequency dimension. 2020/175955 1»（：1^1{2020/002889 In order to obtain a diversity effect, the index of the physical resource unit to which one logical resource unit is mapped may change in a predetermined pattern over time. In the structure of such a resource unit, a resource pool can mean a set of resource units that a terminal that wishes to transmit an SL signal can use for transmission.

[150] The resource pool can be subdivided into several types. For example, depending on the content of the SL signal transmitted from each resource pool, the resource pool can be classified as follows.

[151] (1) Scheduling Assignment (SA) is the location of resources used by the transmitting terminal for transmission of SL data channels, and MCS (Modulation and Coding Scheme) or MIMO (Multiple Input) required for demodulation of other data channels. It may be a signal that includes information such as multiple output) transmission method and TA (Timing Advance). The SA can be multiplexed and transmitted with SL data on the same resource unit. In this case, the SA resource pool may mean a resource pool in which SA is multiplexed with SL data and transmitted. SA may also be referred to as an SL control channel.

[152] (2) The SL data channel (Physical Sidelink Shared Channel, PSSCH) can be a resource pool used by the transmitting terminal to transmit user data. If SA is multiplexed and transmitted together with SL data on the same resource unit, Only SL data channels of the type excluding SA information can be transmitted from the resource pool for the SL data channel. In other words, REs (Resource Elements) used to transmit SA information on individual resource units in the SA resource pool are SL data. It can still be used to transmit SL data in the resource pool of the channel; for example, the transmitting terminal can transmit by mapping the PSSCH to successive PRBs.

[153] (3) The discovery channel can be a resource pool for transmitting information such as the transmitting terminal's own ID. Through this, the transmitting terminal can discover itself.

[154] Sending/receiving SL signals even if the contents of the SL signal described above are the same

Different resource pools can be used depending on the properties. For example, even with the same SL data channel or discovery message, the transmission timing determination method of the SL signal (e.g., whether it is transmitted at the time of reception of the synchronization reference signal or at the time of the reception) Whether it is transmitted by applying a certain timing advance), resource allocation method (e.g., whether the base station assigns the transmission resource of an individual signal to an individual transmission terminal, or whether the individual transmission terminal selects the individual signal transmission resource itself within the resource pool) ,Signal format (e.g., the number of symbols each SL signal occupies in one subframe, or the number of subframes used for transmission of one SL signal), the signal strength from the base station, the transmission power strength of the SL terminal, etc. Therefore, it can be divided into different resource pools again.

[155] Hereinafter, resource allocation in SL will be described.

14 is a V2X or SL according to the transmission mode according to an embodiment of the present disclosure 2020/175955 1» (: 1^1{2020/002889 Indicates a procedure for performing communication. In various embodiments of the present disclosure, the transmission mode may be referred to as a mode or resource allocation mode. Hereinafter, for convenience of explanation, , In LTE, the transmission mode can be called LTE transmission mode, and in NR, the transmission mode can be called NR resource allocation mode.

[157] For example, (a) of FIG. 14 shows a terminal operation related to LTE transmission mode 1 or LTE transmission mode 3. Or, for example, (a) of FIG. 14 is related to NR resource allocation mode 1 It shows the terminal operation. For example, LTE transmission mode 1 can be applied to general SL communication, and LTE transmission mode 3 can be applied to V2X communication.

[158] For example, (ratio of FIG. 14 represents a terminal operation related to LTE transmission mode 2 or LTE transmission mode 4). Or, for example, (ratio of FIG. 14 is a terminal operation related to NR resource allocation mode 2) Represents

Referring to FIG. 14A, in LTE transmission mode 1, LTE transmission mode 3, or NR resource allocation mode 1, the base station can schedule SL resources to be used by the terminal for SL transmission. For example For example, the base station can perform resource scheduling to terminal 1 through PDCCH (more specifically, DCI (Downlink Control Information)), and terminal 1 can perform V2X or SL communication with terminal 2 according to the above resource scheduling. , Terminal 1 transmits SCI (Sidelink Control Information) through PSCCH (Physical Sidelink Control Channel) to terminal 2, and then transmits the data based on the SCI.

It can be transmitted to Terminal 2 through PSSCH (Physical Sidelink Shared Channel).

[16 In this example, in the resource allocation mode 1, the terminal uses a dynamic grant.

Through this, resources for one or more SL transmissions of one TB (Transport Block) can be provided or allocated from the base station. For example, the base station provides resources for PSCCH and/or PSSCH transmission to the terminal using a dynamic grant. For example, the transmitting terminal is the SL received from the receiving terminal.

HARQ (Hybrid Automatic Repeat Request) feedback can be reported to the base station. In this case, the base station allocates resources for SL transmission within the PDCCH.

Based on the indication, PUCCH resources and timing for reporting SL HARQ feedback to the base station can be determined.

[161] For example, DCI may represent the slot offset between DCI reception and the first SL transmission scheduled by the DCI. For example, the minimum between DCI scheduling SL transmission resources and the first SL transmission resource scheduled by the DCI. Gap is handled by the terminal

It may not be less than the processing time.

[162] For example, in the NR resource allocation mode 1, the terminal can provide or receive a resource set from the base station for multiple SL transmissions through a configured grant. A grant may include a configured grant type 1 or a configured grant type 2. For example, a terminal may determine the TB to be transmitted in (occasions) in each case indicated by a given configured grant. 2020/175955 1»（：1^1{2020/002889

[163] For example, a base station can allocate resources to terminals on the same carrier.

And resources can be allocated to terminals on different carriers.

[164] For example, an NR base station can control 1⁄4 based communication. For example, an NR base station may transmit an NR DCI to the terminal to schedule 1⁄4 resource. In this case, for example A new RNTI may be defined for scrambling the NR DCI. For example, the terminal may include an NR ^ module and a 1 ¾ module.

[165] For example, a terminal containing a yaw module and an L^E module is NR from gNB

After receiving 0（：1, NR ^ module can convert it to NR ^ 0（L^E 00 type 5 show, NR module

L^E 00 type 5 shows can be delivered to the module. For example, a 1 ¾ module receives 1 ¾ 0 (：1 format 5 shows from an NR SL module).

The activation and/or deactivation can be applied to the first L^E subframe afterwards. For example, the above can be displayed dynamically using a field of .（：1. For example, the minimum value of the above can be applied to

It can be different. For example, the terminal can report one value (1⁄4 no value) according to the terminal's capabilities. For example, the above can be positive.

[166] In Fig. 14 (referring to the ratio, in L^E transmission mode 2, L^E transmission mode 4, or NR resource allocation mode 2, the terminal is set by the base station/network.

The transmission resource can be determined within a resource or a preset resource. For example, the set resource or a preset resource can be a resource pool. For example, the terminal can autonomously select or schedule a resource for transmission. For example, the terminal selects the resource itself from the set resource pool,

Communication can be performed. For example, the terminal can perform sensing (8¥ 1¾) and resource (re) selection procedures to select resources by itself in the selection window. For example, the sensing above is a subchannel unit. In the resource pool, terminal 1, which has selected a resource by itself, transmits 3 (:1 to terminal 2 through parent 3 (：幻1), and then transmits the data based on 3 (:1) above.

Through terminal

Can be sent to 2.

[167] For example, the terminal can help ^ resource selection for other terminals. For example, in NR resource allocation mode 2, the terminal can receive the ^ set grant for transmission (¥11^11 1 bright). For example, in the required resource allocation mode 2, the terminal can schedule the transmission of another terminal. For example, in the NR resource allocation mode 2, the terminal can reserve resources for blind retransmission.

[168] For example, in the required resource allocation mode 2, the first terminal can instruct the second terminal 3 (using it ^ transmission priority. For example, the second terminal can decode the 8011- above, and ,The second terminal can perform sensing and/or resource (re)selection based on the priority. For example, the resource (re) selection procedure, the second terminal identifies candidate resources in the resource selection window. And selecting a resource for (re)transmission from among the candidate resources for which the second terminal has been identified. For example, 2020/175955 1»（：1^1{2020/002889 The resource selection window may be a time interval at which the terminal selects a resource for SL transmission. For example, the second terminal selects a resource (re). After triggering, the resource selection window can start at T1> 0, and the resource selection window can be limited by the remaining packet delay budget of terminal 2. For example, terminal 2 is a resource resource. In the step of identifying candidate resources in the selection window, when a specific resource is indicated by the SCI received from the first terminal by the second terminal and the LI SL RSRP measurement value for the specific resource exceeds the SL RSRP threshold, the The second terminal may not determine the specific resource as a candidate resource. For example, the SL RSRP threshold is the priority of the SL transmission as indicated by the SCI received from the first terminal and the second terminal selected. It can be determined based on the priority of SL transmission on the resource.

[169] For example, the LI SL RSRP can be measured based on the SL Demodulation Reference Signal (DMRS). For example, one or more PSSCH DMRS patterns can be set or preset in the time domain for each resource pool. For example, the PDSCH DMRS configuration type 1 and/or type 2 may be the same or similar to the frequency domain pattern of the PSSCH DMRS. For example, the correct DMRS pattern may be indicated by the SCI. For example, NR resource allocation In mode 2, the transmitting terminal can select a specific DMRS pattern from among the DMRS patterns set for the resource pool or preset.

[17 For example, in NR resource allocation mode 2, based on the sensing and resource (re) selection procedure, the transmitting terminal can perform the initial transmission of TB (Transport Block) without reservation. For example, sensing and resource (re) selection procedure. Based on the resource (re) selection procedure, the transmitting terminal can reserve the SL resources for the initial transmission of the second TB using the SCI associated with the first TB.

[171] For example, in NR resource allocation mode 2, the terminal can reserve resources for feedback-based PSSCH retransmission through signaling related to the previous transmission of the same TB (Transport Block). For example, the current transmission The maximum number of SL resources reserved by one transmission including, for example, may be 2, 3 or 4. For example, the maximum number of SL resources may be the same regardless of whether HARQ feedback is enabled or not. For example, the maximum number of HARQ (re) transmissions for one TB can be limited by settings or presets. For example, the maximum number of HARQ (re) transmissions can be up to 32. For example, above If there is no setting or preset, the maximum number of HARQ (re) transmissions may not be specified. For example, the above setting or preset may be for the transmitting terminal. For example, in NR resource allocation mode 2 , HARQ feedback to release resources not used by the terminal may be supported.

[172] For example, in NR resource allocation mode 2, a terminal can use SCI to instruct another terminal of one or more sub-channels and/or slots used by the terminal. For example, a terminal can use SCI to instruct another terminal of one or more sub-channels and/or slots reserved by the terminal for PSSCH (re) transmission. For example, the smallest allocation unit of an SL resource can be a slot. For example, a subchannel 2020/175955 1»（：1^1{2020/002889 The size can be set for the terminal or can be preset.

[173] Hereinafter, SCI (Sidelink Control Information) will be described.

[174] DCI (Downlink) control information transmitted by the base station to the terminal through the PDCCH

Control Information), while control information transmitted by a terminal to another terminal through the PSCCH can be referred to as SCI. For example, before the terminal decodes the PSCCH, the start symbol of the PSCCH and/or the number of symbols of the PSCCH are determined. For example, the SCI may contain SL scheduling information. For example, a terminal may transmit at least one SCI to another terminal to schedule a PSSCH. For example, one or more SCI formats. (format) can be defined.

[175] For example, the transmitting terminal can transmit SCI to the receiving terminal on the PSCCH. The receiving terminal can decode one SCI to receive the PSSCH from the transmitting terminal.

[176] For example, the transmitting terminal has two consecutive devices on the PSCCH and/or PSSCH.

SCI (e.g., 2-stage SCI) can be transmitted to the receiving terminal. The receiving terminal can decode two consecutive SCIs (e.g., 2-stage SCI) to receive the PSSCH from the transmitting terminal. For example, (relatively) high SCI

When the SCI configuration fields are divided into two groups in consideration of the payload size, the SCI including the first SCI configuration field group can be referred to as the first SCI or the 1st SCI, and the second SCI configuration field group is The included SCI may be referred to as a 2nd SCI or 2nd SCI. For example, the transmitting terminal may transmit the first SCI to the receiving terminal through the PSCCH. For example, the transmitting terminal may transmit the second SCI on the PSCCH and/or PSSCH. SCI can be transmitted to the receiving terminal, e.g. the second SCI is (independent)

It can be transmitted to the receiving terminal through PSCCH, or piggybacked with data through PSSCH and transmitted. For example, two consecutive SCIs can be transmitted in different ways (e.g., unicast, broadcast). )or

It can also be applied for groupcast).

[177] For example, the transmitting terminal may transmit some or all of the following information to the receiving terminal through SCI. Here, for example, the transmitting terminal may transmit some or all of the following information to the first SCI and/or It can be transmitted to the receiving terminal through the second SCI.

[178]-PSSCH and/or PSCCH-related resource allocation information, for example, time/frequency resource location/number, resource reservation information (eg, period), and/or

[179]-SL CSI reporting request indicator or SL (LI) RSRP (and/or SL (LI) RSRQ and/or SL (LI) RSSI) reporting request indicator, and/or

[18-(on PSSCH) SL CSI transmission indicator (or SL (LI) RSRP (and/or SL (LI) RSRQ and/or SL (LI) RSSI) information transmission indicator), and/or

[181]-MCS information, and/or

[182]-transmission power information, and/or

[183]-L1 destination ID information and/or L1 source ID information, 2020/175955 1»（：1^1{2020/002889 and/or

[184]-SL HARQ process (process) ID information, and/or

[185]-NDI (New Data Indicator) information, and/or

[186]-RV (Redundanc y Version) information, and/or

[187]-(transmission traffic/packet related) QoS information, for example, priority information, and/or

[188]-Information on the number of SL CSI-RS transmission indicators or (transmitted) SL CSI-RS antenna ports

[189]-location information of the transmitting terminal or location (or distance area) information of the target receiving terminal (for which SL HARQ feedback is requested), and/or

[19-Reference signal (eg, DMRS, etc.) information related to decoding and/or channel estimation of data transmitted through the PSSCH, information related to the pattern of (time-frequency) mapping resources of the DMRS, Rank information, antenna port index information;

[191] For example, the first SCI may include information related to channel sensing. For example, the receiving terminal may decode the second SCI using the PSSCH DMRS. The polar code used for the PDCCH can be applied to the second SCI. For example, in the resource pool, the payload size of the first SCI is unicast, groupcast and

It may be the same for broadcast. After decoding the first SCI, the receiving terminal does not need to perform blind decoding of the second SCI. For example, the first SCI may contain the scheduling information of the second SCI. have.

On the other hand, in various embodiments of the present disclosure, since the transmitting terminal can transmit at least one of SCI, the first SCI and/or the second SCI to the receiving terminal through the PSCCH, the PSCCH is SCI, the first SCI and /Or may be substituted/substituted with at least one of the second SCI; and/or, for example, SCI may be substituted/substituted with at least one of PSCCH, the first SCI and/or the second SCI, and/or, For example, since the transmitting terminal can transmit the second SCI to the receiving terminal through the PSSCH, the PSSCH can be replaced/replaced with the second SCI.

Meanwhile, FIG. 15 shows three cast types according to an embodiment of the present disclosure.

[194] Specifically, Fig. 15(a) shows a broadcast type SL communication, Fig. 15(b) shows a unicast type SL communication, and Fig. 15(a) shows a groupcast type SL communication. In the case of unicast type SL communication, a terminal can perform one-to-one communication with other terminals. In the case of groupcast type SL communication, a terminal can perform SL communication with one or more terminals in the group to which it belongs. In various embodiments of the present disclosure, SL groupcast communication may be replaced with SL multicast communication, SL one-to-many communication, or the like.

[195] Hereinafter, regarding the in-device coexistence of LTE SL and NR SL

Explain.

[197] Referring to FIG. 16, the terminal is a module related to LTE SL transmission and a module related to NR SL transmission. 2020/175955 1»（：1^1{2020/002889 May contain modules. Created in higher layers

Packets related to transmission are

Packets related to the NR SL transmission generated in the upper layer can be delivered to the NR module, where, for example, the 1⁄4 module and the NR module can be delivered to a common upper layer (e.g. Or, for example, a 1⁄4 module and an NR module may be associated with different upper layers (e.g., a higher layer associated with a 1⁄4 module and a higher layer associated with an NR module). Each packet can be associated with a specific priority. In this case, the 1⁄4 module is NR

Without knowing the priority of packets related to transmission, the NR module

You may not know the priority of the packet related to the transmission.

The priority of a packet related to transmission and the priority of a packet related to NR transmission can be exchanged between the 1⁄4 module and the NR module. Therefore, the 1⁄4 module and the NR module 1⁄4 module.

You can know the priority of the packet related to transmission and the priority of the packet related to transmission.

When transmission and NR transmission are superimposed, the terminal can only perform transmission related to the high priority by comparing the priority of the packet related to the transmission and the priority of the packet related to the NR 81 _^ transmission. , NR V2X priority field and momo! ⁵ can be directly compared to each other.

[198]

Of services related to transmission

Describes an example of the priority of a service related to transmission. For convenience of explanation, the explanation is based on the Momo Momo, but the priority is not limited to Momo Momo. For example, the priority can be defined in various ways. For example, the same type of common priority can be applied to NR-related services and L^E-related services.

[199] [Table 5]

[20] For example, in the embodiment of Table 5, it is assumed that the terminal decides to transmit the LTE SL service A and the NR SL service E, and the transmission for the LTE SL service A and the transmission for the NR SL service E are superimposed. For example, transmissions for LTE SL service A and transmissions for NR SL service E may be partially or completely superimposed in the time domain. In this case, the terminal performs only the SL transmissions associated with high priority, and low priority. The SL transmission related to the ranking may be omitted. For example, the terminal may transmit only LTE SL service A on the first carrier and/or the first channel. On the other hand, the terminal may transmit the NR SL service E to the second carrier and/or It may not transmit on the second channel.

[201] Hereinafter, CAM (Cooperative Awareness Message) and DENM (Decentralized

Environmental Notification Message).

[202] In vehicle-to-vehicle communication, periodic message type CAM and event 2020/175955 1»（：1^1{2020/002889 DENM of the event triggered message type can be transmitted.

The CAM can contain basic vehicle information such as vehicle dynamic status information such as direction and speed, vehicle static data such as dimensions, exterior lighting conditions, and route history. The size of the CAM can be 50-300 bytes. CAM is broadcast, latency should be less than 100ms. DENM may be a message generated in the event of an unexpected situation such as a vehicle breakdown or accident. The size of DENM can be less than 3000 bytes, and any vehicle within the transmission range can receive the message, at which point DENM can have a higher priority than CAM.

[203] Hereinafter, carrier reselection will be described.

[204] In V2X or SL communication, the terminal can perform carrier reselection based on the Channel Busy Ratio (CBR) of the set carriers and/or the PPPP (Prose Per-Packet Priority) of the V2X message to be transmitted. For example, ,Carrier reselection may be performed by the MAC layer of the terminal. In various embodiments of the present disclosure, PPPP (ProSe Per Packet Priority) may be replaced by PPPR (ProSe Per Packet Reliability), and PPPR may be replaced by PPPP. For example, a smaller PPPP value can mean a higher priority, a larger PPPP value can mean a lower priority. For example, a smaller PPPR value can mean higher reliability, and a larger PPPR value can mean higher priority. It can mean low 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 service, packet or message associated with a high priority. The PPPR value associated with a message may be less than the PPPR value associated with a service, packet, or message associated with low reliability.

[205] CBR is the S-RSSI (Sidelink-Received Signal Strength) measured by the terminal.

Indicator) can mean the portion of sub-channels in the resource pool that is detected as exceeding a preset threshold value associated with each logical channel.

PPPP may exist, and the setting of the PPPP value should reflect the latency required for both the terminal and the base station When reselecting a carrier, the terminal can select one or more of the candidate carriers in increasing order from the lowest CBR .

[206] Hereinafter, the RRC connection establishment between terminals will be described.

[207] For V2X or SL communication, the transmitting terminal may need to establish a (PC5) RRC connection with the receiving terminal. For example, the terminal can acquire a V2X-specific SIB (V2X-specific SIB). For a terminal that has data to be transmitted, which is set to transmit V2X or SL communication by an upper layer, if at least the frequency set to transmit for SL communication is included in the V2X-specific SIB, the transmission resource pool for that frequency Without including, the terminal can establish an RRC connection with another terminal. For example, when an RRC connection is established between a transmitting terminal and a receiving terminal, the transmitting terminal can perform unicast communication with the receiving terminal through the established RRC connection.

[208] When the RRC connection is established between the terminals, the transmitting terminal receives the RRC message 2020/175955 1»（：1^1{2020/002889 Can be sent to the terminal.

17 shows a transmission procedure of an RRC message according to one implementation of the present disclosure.

Referring to FIG. 17, an RRC message generated by a transmitting terminal may be transmitted to a PHY layer through a PDCP layer, an RLC layer, and a MAC layer. RRC message is

It can be transmitted through SRB (Signalling Radio Bearer), and the PHY layer of the transmitting terminal can perform coding, modulation, and antenna/resource mapping for the transmitted information, and the transmitting terminal can transmit the information to the receiving terminal. .

[211] The receiving terminal performs antenna/resource demapping, demodulation, and decoding for the received information.

The information can be transmitted to the RRC layer through the MAC layer, RLC layer, and PDCP layer. Therefore, the receiving terminal can receive the RRC message generated by the transmitting terminal.

[212] V2X or SL communication can be supported for a terminal in RRC_CONNECTED mode, a terminal in RRCJDLE mode, and a terminal in (NR) RRCJNACTIVE mode. That is,

RRC_CONNECTED mode terminal, RRCJDLE mode terminal and (NR)

A terminal in RRCJNACTIVE mode can perform V2X or SL communication.

A terminal in RRCJNACTIVE mode or a terminal in RRCJDLE mode can perform V2X or SL communication by using the cell-specific configuration included in the SIB specific to V2X.

[213] RRC can be used at least to exchange UE capability and AS layer configuration. For example, the first terminal can transmit the UE capability and AS layer configuration of the first terminal to the second terminal, and Terminal 1 can receive the UE capability and AS layer settings of terminal 2 from terminal 2. In the case of UE capability transfer, the information flow can be triggered during or after PC5-S signaling for direct link setup.

19 shows a bidirectional UE capability transfer according to an embodiment of the present disclosure.

[216] For the AS layer configuration, the information flow can be triggered during or after PC5-S signaling for direct link configuration.

20 shows a bidirectional AS layer setting according to an embodiment of the present disclosure.

[218] For groupcast, one-to-many PC5-RRC connections between group members

Establishment (one-to-many PC5-RRC connection establishment) may not be necessary.

[219] Hereinafter, SL RLM (Radio Link Monitoring) will be described.

[220] In the case of unicast AS-level link management, SL

RLM (Radio Link Monitoring) and/or RLF (Radio Link Failure) declarations may be supported. In the case of RLC AM (Acknowledged Mode) in SL unicast, the RLF declaration can be triggered by an instruction from the RLC indicating that the maximum number of retransmissions has been reached. The AS-level link status (e.g. failure) may have to be known to a higher layer Unlike the RLM procedure for unicast, the RLM design for groupcast may not be considered. Among group members for 2020/175955 1»（：1^1{2020/002889

RLM and/or RLF declarations may not be required.

[221] For example, the transmitting terminal can transmit the reference signal to the receiving terminal,

The terminal can perform SL RLM using the reference signal. For example, the receiving terminal can declare the SL RLF by using the reference signal. For example, the reference signal may be referred to as an SL reference signal. .

[222] Hereinafter, the SL measurement and reporting will be described.

[223] For QoS purposes such as prediction, initial transmission parameter setting, link adaptation, link management, and admission control, SL instantiation between terminals and Reporting (e.g., RSRP, RSRQ) can be considered in the SL, e.g. the receiving terminal

The reference signal can be received from the terminal, the receiving terminal can measure the channel state of the transmitting terminal based on the reference signal, and the receiving terminal can report channel state information (CSI) to the transmitting terminal. . SL related measurement and reporting can include measurement and reporting of CBR, and reporting of location information.

An example of CSI (Channel Status Information) for V2X is CQI (Channel Quality

Indicator), PMI (Precoding Matrix Index), RI (Rank Indicator), RSRP (Reference Signal Received Power), RSRQ (Reference Signal Received Quality),

It may be pathgain/pathloss, SRI (SRS, Sounding Reference Symbols, Resource Indicator), CRI (CSI-RS Resource Indicator), interference condition, vehicle motion, etc. For unicast communication, CQI, RI, and PMI, or some of them, assume four or fewer antenna ports.

It may be supported in a non-subband-based aperiodic CSI report. The CSI procedure may not depend on the standalone RS. CSI reporting can be enabled and disabled depending on the settings.

For example, the transmitting terminal can transmit the CSI-RS to the receiving terminal, and the receiving terminal can measure CQI or RI using the CSI-RS. For example, the above

CSI-RS may be referred to as SL CSI-RS. For example, the CSI-RS may be confined within PSSCH transmission. For example, the transmitting terminal is on the PSSCH resource.

It can be transmitted to the receiving terminal by including the CSI-RS.

[225] Hereinafter, physical layer processing will be described.

[226] According to one embodiment of the present disclosure, the data unit is

Prior to transmission, the transmission, i.e., may be subject to physical verification processing at the transmitting side. According to one embodiment of the present disclosure, a radio signal carrying a data unit may be subject to physical verification processing at the receiving side. have.

21 shows the physical layer processing of the transmission side, according to an embodiment of the present disclosure.

[228] Table 6 can show the mapping relationship between the uplink transmission channel and the physical channel, and Table 7 can show the mapping relationship between the uplink control channel information and the physical channel. 2020/175955 1»(：1^1{2020/002889

[Table 6]

[23] [Table 7]

[231] Table 8 can show the mapping relationship between the downlink transmission channel and the physical channel, and Table 9 can show the mapping relationship between the downlink control channel information and the physical channel.

[232] [Table 8]

[233] [Table 9]

[234] The mapping relationship between the song channel and the physical channel can be shown, and Table 11 can show the mapping relationship between the control channel information and the physical channel.

[235] [Table 1

[236] [Table 11]

Referring to FIG. 21, in step S100, the transmission side may perform encoding on a transport block (TB). Data and control streams from the MAC layer can be encoded to provide transport and control services over a radio transmission link in the PHY implementation, e.g. TB from the MAC inheritance That is, it can be encoded as a codeword on the (transmitting side) channel coding scheme is error detection, error correcting, rate matching, interleaving, and separation from physical channels. It may be a combination of controlled information or transmission channels. Or, channel coding

Bang! (scheme) is an error ¾ line (error detection), error correcting, error 1 °| 2020/175955 1»(：1^1{2020/002889 It may be a combination of rate matching, interleaving, and control information mapped on a physical channel or a transmission channel.

[238] In the NR system, the following channel coding scheme can be used for different types of transport channels and different types of control information. For example, the channel coding scheme for each transport channel type can be as shown in Table 12. For example For example, the channel coding method for each control information type can be as shown in Table 13.

[239] [Table 12]

[24 is [Table 13]

[241] For example, a polar code can be applied to the PSCCH. For example, the LDPC code can be applied to a TB transmitted over the PSSCH.

[242] For transmission of TB (eg, MAC PDU), the transmitting side

The redundancy check) sequence can be attached, thus providing error detection on the transmission or reception. In SL communication, the transmitting side may be a transmitting terminal, and the receiving side may be a receiving terminal. In the NR system, the communication device can use the LDPC code to encode/decode UL-SCH and DL-SCH. The NR system can support two LDPC base graphs (i.e. two LDPC base metrics), two LDPC base graphs can be optimized LDPC base graph 1 for small TB and LDPC base graph for large TB. The LDPC base graph 1 or 2 can be selected based on the TB size and the coding rate (R). The coding rate can be indicated by the modulation coding scheme (MCS) index (I_MCS). The MCS index may be dynamically provided to the terminal by the PDCCH scheduling the PUSCH or the PDSCH. Alternatively, the MCS index may be dynamically provided to the terminal by the PDCCH that (re)initializes or activates the UL configured grant 2 or DL SPS. . The MCS index may be provided to the terminal by RRC signaling related to UL configured grant type 1. If the CRC attached TB is larger than the maximum code block size for the selected LDPC base graph, the transmitting side can divide the CRC-attached TB into multiple code blocks, and the transmitting side can attach an additional CRC sequence to each code block. have. The maximum code block size for LDPC Basegraph 1 and LDPC Basegraph 2 is 8448 bits and 2020/175955 1»（：1^1{2020/002889

May be 3480 bits. If the CRC attached TB is not larger than the maximum code block size for the selected LDPC base graph, the transmitting side can encode the CRC-attached TB into the selected LDPC base graph. The transmitting side encodes each code block of the TB into the selected LDPC basic graph. And, LDPC-coded blocks can be individually rate matched. Code block concatenation can be performed to generate codewords for transmission on the PDSCH or PUSCH. For the PDSCH, up to two codewords (ie, up to two TBs) can be transmitted simultaneously on the PDSCH. PUSCH may be used for transmission of UL-SCH data and layer 1 and/or 2 control information. Although not shown in FIG. 21, layer 1 and/or 2 control information may be multiplexed with codewords for UL-SCH data. have.

[243] In steps S101 and S102, the transmitting side can perform scrambling and modulation on the codeword. The bits of the codeword can be scrambled and modulated to generate a block of a complex-valued modulation symbol. .

[244] In step S103, the transmitting side may perform layer mapping.

Complex modulated symbols can be mapped to one or more multiple input multiple output (MIMO) layers; codewords can be mapped to up to four layers. The PDSCH can carry two codewords, and thus the PDSCH can support up to 8-layer transmission. PUSCH can support a single codeword, and therefore, PUSCH can support up to 4-layer transmission.

[245] In step S104, the transmission side can perform precoding conversion. Downlink transmission

The waveform may be a general OFDM (Orthogonal Frequency Division Multiplexing) using a cyclic prefix (CP). For the downlink, transform precoding (i.e., Discrete Fourier Transform (DFT)) is not applied. I can't.

[246] The uplink transmission waveform may be a conventional OFDM using a CP having a transform precoding function that performs DFT spreading that can be disabled or enabled. In the NR system, for the uplink, if enabled, conversion precoding can be selectively applied. Conversion precoding is a special way to reduce the uplink data to reduce the peak-to-average power ratio (PAPR) of the waveform. Transformation precoding can be a form of DFT, i.e. the NR system can support two options for the uplink waveform, one can be CP-OFDM (same as the DL waveform), the other May be DFT-s-OFDM. Whether the terminal should use CP-OFDM or DFT-s-OFDM can be determined by the base station via the RRC parameter.

[247] In step S105, the transmitting side can perform subcarrier mapping. The layer can be mapped to an antenna port. In the downlink, for layer-to-antenna port mapping, in a transparent manner (non-codebook based). Mapping can be supported, and how beamforming or MIMO precoding is performed can be transparent to the terminal. 2020/175955 1»（：1^1{2020/002889 There is. In the uplink, for layer-to-antenna port mapping, both non-codebook-based mapping and codebook-based mapping can be supported.

[248] For each antenna port (i.e., layer) used for transmission of a physical channel (eg, PDSCH, PUSCH, PSSCH), the transmitting side transfers complex-value modulated symbols to the subcarriers in the resource block allocated to the physical channel. Can be mapped.

[249] In step S106, the transmitting side can perform OFDM modulation.

By adding CP and performing IFFT (Inverse Fast Fourier Transform), the device sets the time-continuous OFDM baseband signal on the antenna port (p) and subcarrier spacing for the OFDM symbol (1) in the TTI for the physical channel. (U) can be created. For example, for each OFDM symbol, the communication device on the transmitting side can perform Inverse Fast Fourier Transform (IFFT) on the complex-valued modulation symbol mapped to the resource block of the corresponding OFDM symbol. In addition, a communication device that is transmitted can add a CP to the IFFT signal to generate an OFDM baseband signal.

[25 In this step S107, the transmission side can perform up-conversion.

The communication device of the side is the antenna port (OFDM baseband signal to the target, subcarrier spacing setting (u) and OFDM symbol (1)) to the carrier of the cell to which the physical channel is assigned.

It can up-convert to frequency (f0).

[251] The processors 102 and 202 of FIG. 38 are encoding, scrambling, modulation, layer mapping,

Precoding transformation (for uplink), subcarrier mapping, and OFDM modulation

Can be set to perform.

[253] The physical layer processing of the receiving side may basically be the reverse processing of the physical layer processing of the transmitting side.

[254] In step SH0, upon reception, a frequency down-conversion can be performed.

The communication device of the receiving side can receive the RF signal of the carrier frequency through the antenna. The transceivers 106 and 206 that receive the RF signal at the carrier frequency are the carrier frequency of the RF signal to obtain the OFDM baseband signal. Can be downconverted to the baseband.

[255] In step Si ll, the receiving side can perform OFDM demodulation. The receiving or communication device uses a complex-valued modulation symbol through CP separation and Fast Fourier Transform (FFT). For example, for each OFDM symbol, the communication device on the receiving side can remove the CP from the OFDM baseband signal, and the communication device on the receiving side can obtain the antenna port (p) and subcarrier. FFT can be performed on the CP-removed OFDM baseband signal to obtain the complex-value modulated symbol for spacing (u) and OFDM symbol (1).

[256] In step S112, subcarrier demapping is to be performed immediately upon reception. 2020/175955 1»（：1^1{2020/002889 can be done. Subcarrier demapping can be performed on the complex value modulation symbol to obtain the complex value modulation symbol of the corresponding physical channel. For example, the terminal The processor of can acquire a complex value modulation symbol mapped to a subcarrier belonging to the PDSCH from among the complex value modulation symbols received from the BWP (Bandwidth Part).

[257] In step S113, transform de-precoding may be performed immediately upon reception. Transform de-precoding is enabled for the unidirectional link physical channel, and transform de-precoding (for example, IDFT (In verse Discrete Fourier Transform) can be performed on the complex-value modulated symbol of the uplink physical channel. On the downlink physical channel and the uplink physical channel in which transformation precoding is disabled, transformation

De-precoding may not be performed.

[258] In step S114, layer demapping can be performed upon reception. The complex value modulation symbol can be demapped into one or two codewords.

[259] In steps S115 and S116, the receiving side can perform demodulation and descrambling. The complex value modulation symbol of a codeword can be demodulated and

Can be descrambled.

[26 In this step S117, the receiving side can perform decoding. The codeword is TB.

Can be decoded. For UL-SCH and DL-SCH, LDPC base graph 1 or 2 may be selected based on the size of TB and the coding rate (. Codewords may include one or more coded blocks. Each coded block The selected LDPC base graph can be decoded into a CRC-attached code block or a CRC-attached TB. If code block segmentation is performed on the TB-attached TB at the transmission side, the CRC-attached code block The CRC sequence can be removed from each of them, and code blocks can be obtained. The code blocks can be connected to the TB to which the CRC is attached. The TB CRC sequence is the CRC attached.

It can be removed from TB, whereby TB can be obtained. TB can be delivered to the MAC layer.

The processors 102 and 202 of FIG. 38 may be configured to perform OFDM demodulation, subcarrier demapping, layer demapping, demodulation, descrambling, and decoding.

[262] In the physical layer processing at the transmit/receive side described above, time and frequency domain resources related to subcarrier mapping (for example, OFDM symbol, subcarrier, carrier frequency), OFDM modulation and frequency up/down conversion are resources. It can be determined based on the allocation (eg, uplink grant, downlink allocation).

[263] Hereinafter, a HARQ (Hybrid Automatic Repeat Request) procedure will be described.

[264] The error compensation method for securing the reliability of communication is FEC (Forward Error

Correction) method (scheme) and ARQ (Automatic Repeat Request) method can be included. In the FEC method, errors at the receiving end can be corrected by adding an extra error correction code to the information bits. FEC method has little delay and transmits and receives 2020/175955 1»（：1^1{ 2020/002889 There is an advantage that there is no need to send and receive information separately, but there is a disadvantage that the system efficiency decreases in a good channel environment. Although the ARQ method can increase transmission reliability, there is a disadvantage that a time delay occurs and the system efficiency decreases in a poor channel environment.

[265] The HARQ (Hybrid Automatic Repeat Request) method is a combination of FEC and ARQ. It checks whether the data received by the physical layer contains an undecryptable error, and if an error occurs, performance can be improved by requesting retransmission. .

[266] For SL unicast and groupcast, HARQ feedback and

HARQ combining can be supported. For example, when the receiving terminal operates in resource allocation mode 1 or 2, the receiving terminal can receive the PSSCH from the transmitting terminal, and the receiving terminal can receive PSFCH (Physical Sidelink Feedback Channel). )Through the

The HARQ feedback for the PSSCH can be transmitted to the transmitting terminal using the SFCI (Sidelink Feedback Conformation Information) format.

[267] For example, SL HARQ feedback can be enabled for unicast. In this case, in a non-Code Block Group (non-CBG) operation, the receiving terminal decodes the PSCCH targeting the receiving terminal, And if the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal can generate HARQ-ACK. And, the receiving terminal can transmit HARQ-ACK to the transmitting terminal. On the other hand, the receiving terminal can transmit the receiving terminal. After decoding the target PSCCH, if the receiving terminal cannot successfully decode the transport block related to the PSCCH, the receiving terminal can generate HARQ-NACK. And, the receiving terminal can transmit HARQ-NACK to the transmitting terminal. have.

[268] For example, SL HARQ feedback can be enabled for groupcast. For example, in non-CBG operation, two HARQ feedback options can be supported for groupcast.

[269] (1) Groupcast option 1: After the receiving terminal decodes the PSCCH targeting the receiving terminal, if the receiving terminal fails to decode the transport block related to the PSCCH, the receiving terminal sends HARQ-NACK to the PSFCH. On the other hand, when the receiving terminal decodes the PSCCH targeting the receiving terminal, and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal transmits HARQ-ACK to the transmitting terminal. You can't.

[27] (2) Groupcast option 2: After the receiving terminal decodes the PSCCH targeting the receiving terminal, if the receiving terminal fails to decode the transport block related to the PSCCH, the receiving terminal uses HARQ-NACK to perform the PSFCH. It can be transmitted to the transmitting terminal through the transmission terminal. And, the receiving terminal uses the PSCCH targeting the receiving terminal.

After decoding and the receiving terminal successfully decodes the transport block related to the PSCCH, the receiving terminal can transmit HARQ-ACK to the transmitting terminal through the PSFCH. 2020/175955 1»（：1^1{2020/002889

[271] For example, if groupcast option 1 is used for SL HARQ feedback, all terminals performing groupcast communication can share PSFCH resources. For example, terminals belonging to the same group use the same PSFCH resource. Thus, HARQ feedback can be transmitted.

[272] For example, if groupcast option 2 is used for SL HARQ feedback, each terminal performing groupcast communication can use a different PSFCH resource for HARQ feedback transmission. For example, in the same group. The belonging terminal may transmit HARQ feedback using different PSFCH resources.

[273] For example, when SL HARQ feedback is enabled for groupcast, receive

The terminal may determine whether to transmit HARQ feedback to the transmitting terminal based on the TX-RX (Transmission-Reception) distance and/or RSRP.

[274] For example, in the case of TX-RX distance-based HARQ feedback in groupcast option 1, if the TX-RX distance is less than or equal to the communication range requirement, the receiving terminal can transmit HARQ feedback for the PSSCH to the transmitting terminal. On the other hand, if the TX-RX distance is greater than the communication range requirement, the receiving terminal may not transmit HARQ feedback for the PSSCH to the transmitting terminal. For example, the transmitting terminal may not transmit the HARQ feedback on the PSSCH to the transmitting terminal through the SCI related to the PSSCH. For example, the SCI associated with the PSSCH may be a second SCI. For example, the receiving terminal may determine the TX-RX distance based on the location of the receiving terminal and the location of the transmitting terminal. For example, the receiving terminal decodes the SCI related to the PSSCH to know the communication range requirements used for the PSSCH.

[275] For example, in the case of resource allocation mode 1, the time between PSFCH and PSSCH is

In the case of unicast and groupcast, if retransmission is required on the SL, this can be instructed to the base station by the terminal in the coverage using PUCCH. The transmitting terminal is not in the form of HARQ ACK/NACK. It is also possible to transmit an indication to the serving base station of the transmitting terminal in the form of SR (Scheduling Request)/BSR (Buffer Status Report). In addition, even if the base station does not receive the above instruction, the base station transmits the SL retransmission resource to the terminal. For example, in the case of resource allocation mode 2, the time between PSFCH and PSSCH may be set or may be preset.

[276] For example, in terms of the transmission of the terminal in the carrier, the TDM between PSCOi/PSSCH and PSFCH may be allowed for the PSFCH format for SL in the slot. For example, a sequence-based PSFCH with one symbol Format may be supported. Here, the single symbol may not be an AGC section. For example, the sequence-based PSFCH format may be applied to unicast and groupcast.

[277] For example, in a slot associated with the resource pool, the PSFCH resource may be periodically set to an N slot section, or may be set in advance. For example, N may be set to one or more values of 1 or more. For example, N can be 1, 2 or 4. For example, 2020/175955 1»（：1^1{2020/002889 HARQ feedback on transmission in a specific resource pool is

It can only be transmitted over PSFCH.

[278] For example, if the transmitting terminal transmits the PSSCH to the receiving terminal over slots #X to slots #N, the receiving terminal will send HARQ feedback for the PSSCH to slot #(N +

A) can transmit to the transmitting terminal. For example, slot # (N + A) may contain a PSFCH resource, where, for example, A may be the smallest integer greater than or equal to K. For example For example, can be the number of logical slots. In this case, can be the number of slots in the resource pool. Or, for example, K can be the number of physical slots. In this case, K can be the number of slots inside and outside the resource pool. Can be

[279] For example, in response to one PSSCH transmitted by the transmitting terminal to the receiving terminal, when the receiving terminal transmits HARQ feedback on the PSFCH resource, the receiving terminal is based on the implicit mechanism within the set resource pool. The frequency domain and/or the code domain of the resource can be determined. For example, the receiving terminal has a slot index related to PSCCH/PSSCH/PSFCH,

The frequency domain and/or code domain of the PSFCH resource based on at least one of the identifiers for discriminating each receiving terminal in the group for HARQ feedback based on PSCCH/PSSCH-related subchannels and/or groupcast option 2 And/or, for example, the receiving terminal determines the frequency domain and/or code domain of the PSFCH resource based on at least one of SL RSRP, SINR, L1 source ID, and/or location information. can do.

[28] For example, if HARQ feedback transmission through PSFCH of the terminal and HARQ feedback reception through PSFCH are overlapped, the terminal is transmitting HARQ feedback through PSFCH or receiving HARQ feedback through PSFCH based on the priority rule. Either can be selected. For example, the priority rule can be based on the priority indication of the associated PSCCH/PSSCH.

[281] For example, when HARQ feedback transmission through PSFCH for a plurality of terminals of a terminal overlaps, the terminal can select specific HARQ feedback transmission based on a priority rule. For example, a priority rule May be based on the minimum priority indication (priority indication) of the associated PSCCH/PSSCH.

[282] Hereinafter, positioning will be described.

[283] Figure 23 is, according to an embodiment of the present disclosure, 5G capable of positioning for a UE connected to a Next Generation-Radio Access Network (NG-RAN) or E-UTRAN

It shows an example of the architecture in the system.

[284] Referring to FIG. 23, AMF receives a request for a location service related to a specific target group from another entity, such as a Gateway Mobile Location Center (GMLC), or a location service on behalf of a specific target UE in the AMF itself. To

You can decide to get started, then AMF will use LMF (Location Management

Function) can send a location service request. 2020/175955 1»（：1^1{2020/002889 The received LMF can process the above location service request and return the processing result including the estimated location of love to AMF. Meanwhile, the location service request is AMF. In addition to this, when received from another entity such as GMLC, the AMF can forward the processing result received from the LMF to the other entity.

[285] ng-eNB (new generation evolved-NB) and gNB are network elements of NG-RAN that can provide instantaneous results for location administration, measure radio signals to target UEs, and deliver the results to LMF. In addition, the ng-eNB can control several TP (Transmission Points) such as remote radio heads or PRS-only modules that support a PRS (Positioning Reference Signal)-based beacon system for E-UTRA. .

[286] LMF is connected to E-SMLC (Enhanced Serving Mobile Location Center),

The E-SMLC allows the LMF to access the E-UTRAN. For example, the E-SMLC is the downlink acquired by the target UE through the signal transmitted by the LMF from the eNB and/or PRS-only TPs in the E-UTRAN. Measurement can be used to support OTDOA (Observed Time Difference Of Arrival), one of the E-UTRAN positioning methods.

Meanwhile, the LMF can be connected to the SLP (SUPL Location Platform). LMF can support and manage different location services for target UEs.

The LMF can interact with the serving ng-eNB or the serving gNB for the target UE to obtain the location measurement of the UE. For positioning of the target UE, the LMF is

The positioning method is determined based on the LCS (Location Service) client type, required QoS (Quality of Service), UE positioning capabilities, gNB and ng-eNB instantaneous capabilities, and serves these positioning methods. gNB And/or serving ng-eNB. And, the LMF may determine the location estimate for the target UE and additional information such as the location estimate and the accuracy of the speed. SLP is a Secure User Plane Location (SUPL) entity that is responsible for enthronment through a user plane.

[288] UE is a source such as NG-RAN and E-UTRAN, different GNSS (Global Navigation Satellite System), TBS (Terrestrial Beacon System), WLAN (Wireless Local Access Network) access point, Bluetooth beacon and UE pressure sensor. The downlink signal can be measured through. The UE may include an LCS application, and may connect to the LCS application through communication with the network to which the UE is connected or other applications included in the UE. The LCS application may include the measurement and calculation functions necessary to determine the location of the UE, for example, it may include independent positioning functions such as the Global Positioning System (GPS), independent of NG-RAN transmission. The location of the UE can be reported. Such independently obtained positioning information can also be used as auxiliary information of the positioning information obtained from the network.

[289] Figure 24 is a network for measuring the location of the UE according to an embodiment of the present disclosure 2020/175955 1»（：1^1{2020/002889 shows an implementation example.

[29 When the UE is in CM-IDLE (Connection Management-IDLE) state, when the AMF receives the location service request, the AMF establishes a signaling connection with the UE, and a network trigger to allocate a specific serving gNB or ng-eNB You can request service. This operation process is omitted in Fig. 24. That is, in Fig. 24, it can be assumed that it is in the connected mode. However, for reasons such as signaling and data inactivity, the NG-RAN is used to determine the signalling connection. It may be dismissed during the process.

[291] Looking at the operation process of the network to specifically measure the location of the UE with reference to FIG. 24, in step la, a 5GC entity such as GMLC can request a location service to measure the location of the target UE with a serving AMF. However, even if the GMLC does not request location services, according to step lb, it may determine that the serving AMF needs location services to measure the location of the target UE, e.g. for an emergency call. In order to measure the location of the UE, the serving AMF may decide to perform location services directly.

[292] Thereafter, the AMF transmits a location service request to the LMF according to step 2, and according to step 3a, the LMF serves location procedures for acquiring location measurement data or location information assistant data. Can start with eNB, serving gNB. In addition, according to step 3b, the LMF may initiate location procedures for downlink positioning along with the failure. For example, the LMF transmits location assistance data defined in 3GPP TS 36.355 to the UE, or Position estimates or position measurements can be obtained. On the other hand, step 3b may be performed additionally after step 3a is performed, but may be performed in place of step 3a.

[293] In step 4, the LMF may provide a location service response to the AMF. In addition, the location service response may include information on whether or not the location estimation of the UE is successful and an estimate of the location of the UE. Then, to step la If chart 24 procedure is initiated, AMF can deliver location service response to 5GC entities such as GMLC, and if 24 procedure is initiated by step lb, AMF uses location service response to provide location services related to emergency calls, etc. can do.

[294] FIG. 25 shows an example of a protocol layer used to support LPP (LTE Positioning Protocol) message transmission between an LMF and a UE according to an embodiment of the present disclosure.

[295] The LPP PDU may be transmitted through the NAS PDU between the AMF and the UE.

For reference, the LPP is used between a target device (e.g., a UE in the control plane or a SET (SUPL Enabled Terminal) in the user plane) and a location server (e.g., LMF in the control plane or SLP in the user plane). Can be terminated. The LPP messages are NGAP (NG Application Protocol) through NG-C (NG-Control Plane) interface, LTE-Uu and NAS/RRC through NR-Uu interface. 2020/175955 1»（：1^1{2020/002889 Through the middle network interface using the appropriate protocol

It can be delivered in the form of a transparent PDU. The LPP protocol enables positioning for NR and LTE using a variety of positioning methods.

[296] For example, through the LPP protocol, the target device and the location server

It is possible to exchange capability information, exchange auxiliary data for positioning, and/or exchange location information. Also, it is possible to exchange error information and/or to stop the LPP procedure through an LPP message.

26 shows an example of a protocol layer used to support NRPPa (NR Positioning Protocol A) PDU transmission between LMF and NG-RAN nodes according to an embodiment of the present disclosure.

[298] NRPPa can be used for information exchange between NG-RAN node and LMF. Specifically, NRPPa supports E-CID (Enhanced-Cell ID) and OTDOA positioning method for measurement transmitted from ng-eNB to LMF. It is possible to exchange data for, Cell-ID and Cell location ID for NR Cell ID positioning method. AMF is the associated NRPPa

Even if there is no information about the transaction, NRPPa PDUs can be routed based on the LMF's routing ID associated with the NG-C interface.

[299] The procedure of the NRPPa protocol for location and data collection can be divided into two types. The first type is a UE-related procedure for delivering information about a specific UE (for example, location measurement information, etc.). UE associated procedure), and the second type is a non-UE associated procedure for delivering the NG-RAN node and related TP#i applicable information (eg, gNB/ng-eNB/TP timing information, etc.).

procedure). The above two types of procedures can be supported independently or at the same time.

[300] On the other hand, positioning methods supported by NG-RAN include GNSS, OTDOA, E-CID (enhanced cell ID), barometric pressure sensor positioning, WLAN positioning, Bluetooth positioning and terrestrial beacon system (TBS), and UTDOA (Uplink Time Difference). of Arrival). Among the above-described methods, one of the positioning methods may be used to measure the location of the UE, but more than one positioning method may be used to measure the location of the UE.

[301] (1) OTDOA (Observed Time Difference Of Arrival)

27 is a diagram for explaining an OTDOA (Observed Time Difference Of Arrival) positioning method according to an embodiment of the present disclosure

In the OTDOA positioning method, the UE uses the timing of measurement of downlink signals received from a plurality of TPs including eNB, ng-eNB and PRS-only modules. The UE measures the timing of the received downlink signals using the location assistance data received from the location server, and can determine the location of the UE based on these measurement results and the geographic coordinates of neighbors.

[304] The UE connected to the gNB can request a measurement gap for OTDOA measurement from the parent. If the OTDOA auxiliary data is at least one SFN (Single 2020/175955 1»（：1^1{2020/002889

Frequency Network), before requesting an immediate wrap to perform RSTD (Reference Signal Time Difference) measurement

In order to acquire the SFN of an OTDOA reference cell, an autonomous ¾ (autonomous gap) can be used.

[305] Here, the RSTD can be defined based on the smallest relative time difference between the boundaries of the two subframes each received from the reference cell and the measurement cell. That is, the RSTD is the lowest at the start time of the subframe received from the measurement cell. It can be calculated based on the relative time difference between the start time of the subframe of the nearest reference cell and the start time of the subframe of the closest reference cell to the start time of the subframe received from the measurement cell. Meanwhile, the reference cell is to the UE. Can be selected by

[306] For accurate OTDOA measurements, three or more geographically dispersed modules or

It is necessary to measure the time of arrival (TOA) of the signals received from base stations. For example, measure the TOA for each of TP 1, TP 2, and TP 3, and based on the 3 TOAs, RSTD for TP 1-TP 2, RSTD for TP 2-TP 3, and TP 3-TP 1. Calculate the RSTD for, based on it, determine a geometric hyperbola,

The point at which the hyperbola intersect can be estimated as the position of the child, where accuracy and/or uncertainty may arise for each TOA measurement, and the estimated UE position may be known in a specific range depending on the measurement uncertainty.

[307] For example, the RSTD for two TPs can be calculated based on Equation 1.

[308] [Equation 1]

[309] Here, c is the speed of light, {xt, yt} is the (unknown) coordinate of the target UE, {xi, yi} is the coordinate of the (known) TP, and {xl, yl} is the reference TP ( Or it may be the coordinates of another TP), where, (Ti-Tl) is the transmission time offset between the two TPs, “Real Time

Differences” (RTDs), where ni, can represent the value for the UE TOA measurement error.

[310] (2) E-CID (Enhanced Cell ID)

[311] In the cell ID (CID) positioning method, the location of the UE can be measured through the serving ng-eNB of the UE, the serving gNB, and/or the geographic information of the serving cell. For example, serving ng-eNB, serving gNB And/or geographic information of the serving cell may be obtained through paging, registration, and the like.

[312] On the other hand, the E-CID positioning method improves the UE location estimate in addition to the CID positioning method.

Additional UE measurements and/or NG-RAN radio resources can be used. In the E-CID positioning method, some of the same measurement methods as the measurement control system of the RRC protocol can be used, but in general, additional measurements are not made only for the location measurement of the UE. In other words, a separate measurement is made to measure the location of the UE. Measurement setup 2020/175955 1»（：1^1{2020/002889

(measurement configuration) or immediate control message (measurement control message) may not be provided, and the UE also does not expect to request additional measurement operations for location measurement only, and the measurement values obtained through measurement methods that the UE can measure generally Can report

[313] For example, the serving gNB can implement the E-CID positioning method using E-UTRA measurements provided from the UE.

[314] Examples of measurement elements that can be used for E-CID positioning may be:

[315]-UE measurement: E-UTRA RSRP (Reference Signal Received Power), E-UTRA RSRQ (Reference Signal Received Quality), UE E-UTRA Rx-Tx Time difference, GERAN (GSM EDGE Random) Access Network)/WLAN RSSI (Reference Signal Strength Indication), UTRAN CPICH (Common Pilot Channel) RSCP

(Received Signal Code Power), UTRAN CPICH Ec/Io

[316]-E-UTRAN immediate: ng-eNB receive-transmit time difference (Rx-Tx Time difference), timing

Advance (Timing Advance, TADV), Angle of Arrival (AoA)

[317] Here, TADV can be divided into Type 1 and Type 2 as follows.

[318] TADV Type 1 = (ng-eNB reception-transmission time difference) +(UE E-UTRA reception-transmission time difference)

[319] TADV Type 2 = ng-eNB receive-transmit time difference

[32] Meanwhile, AoA can be used to measure the direction of the UE. AoA

It can be defined as an estimated angle for the location of the UE in a counterclockwise direction from the base station/mother. In this case, the geographical reference direction may be north. The base station/TP is SRS (Sounding Reference Signal) and/or DMRS (Demodulation) for AoA measurement. In addition, the larger the array of antenna arrays, the higher the measurement accuracy of AoA, and if the antenna arrays are arranged at the same interval, signals received from adjacent antenna elements are in a constant phase.

It can have a change (Phase-Rotate).

[321] (3) UTDOA (Uplink Time Difference of Arrival)

[322] UTDOA is a method of determining the location of the UE by estimating the arrival time of the SRS. When calculating the estimated SRS arrival time, the serving cell is used as a reference cell, and the location of the UE can be estimated through the arrival time difference with another cell (or base station/). To implement UTDOA, the E-SMLC is a target UE. In order to instruct SRS transmission to the user, the serving cell of the target UE can be indicated. In addition, E-SMLC can provide configurations such as periodic/aperiodic SRS, bandwidth and frequency/group/sequence hopping. .

[323] Hereinafter, the synchronic acquisition of the SL terminal will be described.

[324] Time division multiple access (TDMA) and frequency division multiples (FDMA)

In a system, accurate time and frequency synchronization is essential. If time and frequency synchronization is not accurate, system performance is degraded due to Inter Symbol Interference (ISI) and Inter Carrier Interference (ICI). Can be 2020/175955 1»（：1^1{2020/002889 Yes. This is the same for V2X. In V2X, for time/frequency synchronization, a sidelink synchronization signal (SLSS) can be used in the physical system, and MIB-SL-V2X (master information block-sidelink-V2X) can be used in the RLC (radio link control) system. Can be used.

28 is a V2X synchronization source (synchronization) according to an embodiment of the present disclosure

source) or synchronization reference.

[326] Referring to FIG. 28, in V2X, the terminal is directly synchronized with GNSS (global navigation satellite systems) or directly synchronized with GNSS (in network coverage or out of network coverage) through a terminal non-indirectly.

Can be synchronized to GNSS. When GNSS is set as the synchronization source, the terminal

DFN and subframe numbers can be calculated using Coordinated Universal Time (UTC) and (pre-)set Direct Frame Number (DFN) offsets.

[327] Alternatively, the terminal may be directly synchronized with the base station, or may be synchronized with another terminal that is time/frequency synchronized with the base station. For example, the base station may be an eNB or gNB. For example, the terminal may be within network coverage. In this case, the terminal may receive synchronization information provided by the base station, and may be directly synchronized with the base station. Thereafter, the terminal may provide the synchronization information to another adjacent terminal. When the base station timing is set as a synchronization criterion, the terminal is a cell associated with the frequency (if it is within cell coverage at the frequency), a primary cell or a serving cell (if it is outside the cell coverage at the frequency) for synchronization and downlink measurement. ) Can be followed.

[328] The base station (e.g., serving cell) can provide synchronization settings for carriers used for V2X or SL communication. In this case, the terminal can follow the synchronization settings received from the base station. If no cell is detected in the carrier wave used for V2X or SL communication, and the synchronization setting is not received from the serving cell, the terminal may follow the preset synchronization setting.

[329] Alternatively, the terminal may be synchronized to another terminal that does not directly or indirectly obtain synchronization information from the base station or GNSS. The synchronization source and preference may be preset to the terminal. Or, the synchronization source and preference may be determined by the base station. It can be set via the control message provided.

[33 This SL synchronization source can be associated with synchronization priority. For example, synchronization

The relationship between source and synchronization priority can be defined as shown in Table 14 or Table 15. Table 14 or Table 15 is just an example, and the relationship between synchronization source and synchronization priority can be defined in various forms.

[331] 2020/175955 1»(：1^1{2020/002889

[Table 14]

[332] [Table 15]

[333] In Table 14 or Table 15, P0 may mean the highest priority, and P6 may mean the lowest priority. In Table 14 or Table 15, the base station includes at least one of the gNB or the eNB. can do.

[334] Whether to use GNSS-based synchronization or base station-based synchronization can be set (in advance). In single-carrier operation, the terminal derives the transmission timing of the terminal from the available synchronization criteria with the highest priority. can do.

[335] Hereinafter, the BWP (Bandwidth Part) and resource pool will be described.

[336] With BA (Bandwidth Adaptation), the reception bandwidth and transmission bandwidth of a terminal need not be as large as that of the cell, and the reception bandwidth and transmission bandwidth of the terminal can be adjusted. For example, the network/base station has bandwidth. The terminal can be informed of adjustments, e.g. the terminal has information/settings for bandwidth adjustment.

In this case, the terminal can perform bandwidth adjustment based on the received information/settings. For example, the bandwidth adjustment can reduce/enlarge the bandwidth, change the position of the bandwidth, or the subcarrier of the bandwidth. 2020/175955 1»（：1^1{2020/002889 May include changes in spacing.

[337] For example, the bandwidth can be reduced for a period of less activity to save power. For example, the location of the bandwidth can be moved in the frequency domain. For example, the location of the bandwidth can be adjusted for scheduling flexibility (scheduling). flexibility) can be moved in the frequency domain, e.g. subcarrier of bandwidth

Subcarrier spacing can be changed; for example, subcarrier spacing of bandwidth can be changed to allow different services. A subset of the total cell bandwidth of a cell can be referred to as a BWP (Bandwidth Part). BA is

This can be done by the base station/network setting the BWP to the terminal and notifying the terminal of the currently active BWP among the BWPs in which the base station/network has been set.

29 shows a plurality of BWPs according to an embodiment of the present disclosure.

[339] Referring to FIG. 29, BWP1 with a bandwidth of 40 MPiz and subcarrier spacing of 15 kHz, BWP2 with a bandwidth of WNfflz and subcarrier spacing of 15 kHz, and BWP3 with a bandwidth of 20 Nfflz and subcarrier spacing of 60 kHz are set. Can be.

[34] Fig. 30 shows a BWP, according to an embodiment of the present disclosure. In the embodiment of Fig. 30,

Assume that there are three BWPs.

[341] Referring to Figure 30, CRB (common resource block) is one side of the carrier band

It can be a numbered carrier resource block from end to end, and a PRB can be a numbered resource block within each BWP, point A is the common reference point for the resource block grid. Can be indicated.

[342] BWP is point A, offset from point A (NstartBWP) and

Can be set by bandwidth (NsizeBWP) e.g. point A is

The subcarrier 0 of the numanology (e.g., all numanology supported by the network on that carrier) can be the external reference point of the carrier's PRB to be aligned; for example, the offset is the lowest subcarrier for a given numanology. It can be the PRB interval between point A and point A. For example, the bandwidth is a given

It may be the number of PRBs in New Manology.

[343] BWP can be defined for SL. The same SL BWP can be used for transmission and reception. For example, a transmitting terminal can transmit an SL channel or SL signal on a specific BWP, and a receiving terminal can transmit the specific BWP above. On a licensed carrier, the SL BWP can be defined separately from the Uu BWP, and the SL BWP can have separate configuration signaling from the Uu BWP. For example, the terminal can receive the settings for SL BWP from the base station/network. SL BWP can be set (in advance) for out-of-coverage NR V2X terminal and RRC_IDLE terminal in the carrier. For a terminal in RRC_CONNECTED mode, at least one SL BWP is 2020/175955 1»（：1^1{2020/002889 Can be activated within the carrier.

[344] The resource pool may be a set of time-frequency resources that can be used for SL transmission and/or SL reception. From the terminal's point of view, the time domain resources in the resource pool may not be contiguous. It can be set (in advance) to a terminal within one carrier. From a physical layer point of view, the terminal can perform unicast, groupcast and broadcast communication using a set or preset resource pool.

[345] Hereinafter, power control will be described.

[346] The method of controlling the uplink transmission power of the terminal itself is open loop power.

Control (Open Loop Power Control, OLPC) and Closed Loop Power Control (CLPC) can be included. According to the open loop power control, the terminal has downlink path loss from the base station of the cell to which the terminal belongs. ) Can be estimated, and the terminal can perform power control in the form of compensating for the above path loss. For example, according to the open-loop power control, if the distance between the terminal and the base station becomes further and the downlink path loss increases, the terminal can control the uplink power by increasing the transmission power of the uplink. According to the closed loop power control, the terminal can receive the information necessary to control the uplink transmission power (for example, a control signal) from the base station, and the terminal can control the uplink power based on the information received from the base station. In other words, according to the closed loop power control, the terminal can control the uplink power according to the direct power control command received from the base station.

[347] Open-loop power control can be supported in SL. Specifically, when the transmitting terminal is within the coverage of the base station, the base station is unicast, groupcast, or unicast based on the path loss between the transmitting terminal and the serving base station of the transmitting terminal. Open-loop power control can be enabled for broadcast transmission When the transmitting terminal receives information/settings from the base station to enable open-loop power control, the transmitting terminal can be used for unicast, groupcast or broadcast transmission. Open loop power control can be enabled, this can be to mitigate interference to the base station's uplink reception.

[348] Additionally, in the case of at least unicast, the configuration is

It can be enabled to use the path loss between the receiving terminals. For example, the above setting can be pre-set for the terminal. The receiving terminal can report the SL channel measurement result (e.g. SL RSRP) to the transmitting terminal. In addition, the transmitting terminal can derive pathloss estimation from the SL channel measurement result reported by the receiving terminal. For example, in SL, when the transmitting terminal transmits a reference signal to the receiving terminal, the receiving terminal The channel between the transmitting terminal and the receiving terminal can be measured based on the reference signal transmitted by the transmitting terminal, and the receiving terminal can transmit the SL channel measurement result to the transmitting terminal, and the transmitting terminal can transmit the SL channel measurement result. The SL path loss from the receiving terminal can be estimated based on. 2020/175955 1»（：1^1{2020/002889 SL power control can be performed by compensating for the estimated path loss, and SL transmission can be performed to the receiving terminal. According to the open-loop power control in SL, for example, when the distance between the transmitting terminal and the receiving terminal becomes farther and the SL path loss increases, the transmitting terminal controls the SL transmission power by further increasing the transmission power of the SL. The power control may be applied when transmitting an SL physical channel (eg, PSCCH, PSSCH, PSFCH (Physical Sidelink Feedback Channel)) and/or SL signal.

[349] To support open-loop power control, long-term measurements (ie, L3 filtering) can be supported on the SL, at least in the case of unicast.

[35 For this example, the total SL transmission power can be the same in the symbol used for PSCCH and/or PSSCH transmission in the slot. For example, the maximum SL transmission power can be set for the transmitting terminal or set in advance. .

[351] For example, in the case of SL open-loop power control, the transmitting terminal can be set to use only the downlink path loss (eg, the path loss between the transmitting terminal and the base station). For example, in the case of SL open loop power control, the transmitting terminal can be set to use only the SL path loss (e.g., the path loss between the transmitting terminal and the receiving terminal). For example, in SL open loop power control In this case, the transmitting terminal can be configured to use the downlink path loss and the SL path loss.

[352] For example, if the SL open-loop power control is set to use both the downlink path loss and the SL path loss, the transmitting terminal will have the power acquired based on the downlink path loss and the SL path loss. Among the power, the minimum value can be determined as the transmit power. For example, the values of P0 and alpha can be set separately or pre-set for the downlink path loss and SL path loss. For example, P0 is received on average. It can be a user-specific parameter related to the SINR, for example the alpha value can be a weighted value for path loss.

[353] Hereinafter, sidelink congestion control will be described.

[354] When the terminal determines the SL transmission resource by itself, the terminal determines the size and frequency of the resource used by itself. Of course, due to constraints from the network, the resource size or frequency above a certain level is determined by itself. Use may be limited; however, if all the terminals use relatively large resources in a situation where many terminals are concentrated in a specific area at a specific time, the overall performance may be significantly degraded due to mutual interference.

[355] Therefore, the terminal needs to observe the channel situation. If it is judged that excessively large resources are being consumed, it is desirable for the terminal to take a form of action to reduce its own resource usage. In this specification, Congestion Control,

CR). For example, the terminal judges whether the energy measured in the unit time/frequency resource is above a certain level, and the energy above a certain level is determined by the ratio of the observed unit time/frequency resource. The amount of transmission resources and 2020/175955 1»（：1^1{2020/002889 The frequency can be adjusted. In this specification, the ratio of time/frequency resources at which energy above a certain level is observed is defined as the Channel Busy Ratio (CBR). The terminal can measure the CBR for the channel/frequency.

Additionally, the terminal can transmit the measured CBR to the network/base station.

31 shows a resource unit for CBR measurement according to an embodiment of the present disclosure.

[357] Referring to FIG. 31, the CBR indicates that the terminal immediately determines the RSSI (Received Signal Strength Indicator) in sub-channel units for a specific period (for example, 100 ms), and the immediate result value of the RSSI has a value equal to or greater than a preset threshold. The number of sub-channels can mean the number of sub-channels. Alternatively, CBR can mean the percentage of sub-channels having a value greater than or equal to a preset threshold among the sub-channels for a specific period. For example, in the embodiment of FIG. Assuming that the channel is a sub-channel with a value above a preset threshold, CBR can mean the percentage of sub-channels that are shaded for a 100 ms interval. Additionally, the terminal can report the CBR to the base station.

For example, as in the embodiment of FIG. 32, when PSCCH and PSSCH are multiplexed, the UE can perform one CBR measurement for one resource pool. Here, if the PSFCH resource is set or in advance If set, the PSFCH resource may be excluded from the CBR measurement.

[359] Furthermore, congestion control may be necessary taking into account the priority of the traffic (eg, packets). For this, for example, the terminal can measure the channel occupancy ratio (CR). Specifically ,The terminal measures the CBR, and the terminal can determine the maximum value (CRlimkk) of the channel occupancy Ratio k, CRk that can be occupied by the traffic corresponding to each priority (for example, k) according to the CBR. For example, the terminal can derive the maximum value of the channel share (CRlimitk) for the priority of each traffic, based on a predefined table of CBR measurements. For example, in the case of traffic with a relatively high priority, the terminal can derive the maximum value of the relatively large channel share. After that, the terminal can make the sum of the channel share of the traffic with the priority level of the traffic lower than i a certain value or less. By limiting to, congestion control can be performed. With this method, stronger channel occupancy limits can be placed on traffic with relatively low priority.

[In addition to 36, the terminal can perform SL congestion control using methods such as size control of transmission power, drop of packets, determination of retransmission, and transmission RB size adjustment (MCS adjustment).

[361] Hereinafter, about physical-layer processing for SL

Explain.

[362] Figure 33 shows the physical layer processing of the SL according to an embodiment of the present disclosure

Show.

[363] The terminal uses a long-length transport block (TB) with a short-length code.

It can be divided into multiple blocks (Code Block, CB), and the terminal 2020/175955 1»（：1^1{2020/002889 After performing the encoding process on each of the plurality of code blocks of length, the terminal can combine the aforementioned short length of code blocks into one again. And, the terminal is one by one. The combined code block can be transmitted to another terminal.

Specifically, referring to FIG. 33, first, the terminal may perform a cyclic redundancy check (CRC) encoding process on a long-length transport block. The terminal may attach the CRC to the transport block. The terminal can divide the full length transport block to which the CRC is attached into a plurality of short-length code blocks, and the terminal can perform the CRC encoding process again for each of the plurality of short-length code blocks. A CRC can be attached to a code block. Therefore, each code block can contain a CRC. And, each code block with a CRC is input to a channel encoder and can undergo a channel coding process. Thereafter, the terminal can perform the rate matching process, bit-wise scrambling, modulation, layer mapping, precoding, and antenna mapping for each code block, and the terminal can transmit it to the receiver.

Additionally, the channel coding method described through FIGS. 21 and 22 can be applied to the SL. For example, the uplink/downlink physical channels and signals described through FIGS. 21 and 22 are SL It can be replaced by physical channels and signals. For example, the channel coding defined for the data channel and the control channel in NR Uu can be defined similarly to the channel coding for the data channel and the control channel on the NR SL, respectively.

[366]

[367] Sims

[368] The conventional LTE-V2X did not support the HARQ feedback operation. On the other hand, the NR-V2X supports the HARQ feedback operation to improve the reliability of the V2X signal. In addition, the NR-V2X radio link control (RLC) ) Layer RLC ARQ operation is supported. However, if the sidelink terminal performs HARQ and RLC ARQ operations at the same time without any conditions, there may be a problem of increasing the protocol overhead and complexity. Therefore, this specification proposes a method to solve this problem.

[369] In the following specification, in the Next Radio (NR) Sidelink (SL) V2X, enabling the RLC ARQ operation according to the channel state measurement result of the physical layer (enabling) or

A method of disabling is proposed. That is, the terminal can reduce the protocol overhead by performing RLC ARQ operation only when the link or channel environment of the physical layer is not good. In addition, the terminal can reduce the protocol overhead. Alternatively, if the channel environment is not good, the reliability of packet transmission and reception can be improved by performing RLC ARQ operation.

[37] In this specification, the sidelink terminal performs only HARQ operation, and RLC ARQ

No operation can be performed as a basic operation. And the terminal according to this specification can trigger the RLC ARQ operation according to the channel state measurement result of the physical layer. Therefore, the terminal according to this specification can trigger the channel state of the physical layer. Unfavorable 2020/175955 1»（：1^1{2020/002889 Only HARQ and RLC ARQ operations can be performed together.

34 to 37 are views for explaining the embodiment(s).

34 is a flowchart showing the operation of the terminal according to the embodiment(s) of the present specification.

Referring to FIG. 34, a terminal may receive a PSCCH (Physical Sidelink Control Channel) including Sidelink Control Information (SCI) from another terminal (S3401). In addition, the terminal includes a reference signal based on the received SCI.

PSSCH ((Physical Sidelink Shared Channel) can be received (S3402), and the terminal can perform HARQ feedback operation for the received PSSCH (S3403), and this HARQ feedback operation is performed regardless of the result of the channel state measurement described later. And the terminal can measure the channel state of the physical layer using the received reference signal (S3404) Here, the measurement of the channel state of the physical layer

It may include an instantiation such as Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Sidelink-Received Signal Strength Indicator (RSSI), or Channel Busy Ratio (CBR).

[374] And the terminal can determine whether the result of the channel status measurement is less than the threshold value (S3405). If the result of the channel status measurement exceeds the threshold value, the terminal can determine whether the link with another terminal or the channel environment is Judging that it is good, and the RLC ARQ operation

This is because even if the terminal does not perform the RLC ARQ operation, the channel state is good and the reliability of the sidelink signal can be guaranteed only by the HARQ operation. On the other hand, when the result of the channel state measurement is below the threshold value, The terminal provides information of the RLC layer, including information for triggering the RLC ARQ operation.

When the channel or link environment is not good, the terminal can guarantee the reliability of the sidelink signal by performing the RCL ARQ operation. In addition, the terminal can transmit the RLC PDU to the other terminal, and the RLC PDU is The RLC PDU header may contain lbit polling bits. And based on the result of the channel state measurement being less than the threshold value, the polling bit may be set to 1. Also, based on the result of the channel state measurement being exceeding the threshold value. Thus, the polling bit can be set to zero. Here, the value of 0 or 1 is an arbitrary setting value, and is not limited thereto. For example, the polling bit may be set to 0 based on the result of the channel state measurement being less than or equal to the threshold value. In addition, the result of the channel state measurement Based on being above the threshold, the polling bit can be set to 1. The other terminal receiving the polling bit

By decoding, it is possible to determine whether the RLC ARQ operation is enabled or disabled. In addition, the terminal can receive ACK/NACK feedback information for the RLC PDU by triggering the RLC ARQ operation.

[375] According to the above-described operation, the terminal can determine whether or not the ARQ operation of the RLC layer is performed based on the channel state of the physical layer. In addition, the terminal allows the RCL ARQ operation to be performed only when the channel state is poor, thereby signaling over. The reliability of the signal can be maintained while reducing the head. 2020/175955 1»（：1^1{2020/002889

[376] Fig. 35 shows the operation of the transmitting terminal and the receiving terminal according to the embodiment(s) of this specification.

This is a drawing for explanation.

[377] Referring to Figure 35, the transmitting terminal and the receiving terminal

The operation is performed by default without any conditions. The transmitting terminal measures the channel status of the physical layer and, if the result is less than the threshold value, 111 乂: Show 11 (3 operations can be started. The transmission terminal is 111 乂: All 1) 11 The included polling bit is set to 1, 111 modules 1) 11 can be transmitted to the receiving terminal. The receiving terminal can receive 111 modules 1) 11, and 111: Show 11 (3 operations can be started. If the terminal successfully decodes 111 乂: all 1) 11, it can transmit a show (:), and if the decoding fails, it can transmit NACK. If the channel state result of the physical layer remains below the threshold, the transmitting terminal and the receiving terminal The terminal can continue to perform operations and 111: show 11 (3 operations. In this specification, the transmitting terminal and the receiving terminal are a relative concept and are not limited to the transmission or reception of signals.

[378] Also, the conditions under which the transmitting terminal triggers ^0 show 11 (3) may be as follows.

[379] In this specification, it is suggested to trigger ^0show11(3 actions when the physical layer measurement value falls below a certain threshold value during Myosho operation. The physical layer can be. The physical layer measurement value is a threshold value.

Layers can indicate that a physical layer measurement has fallen below a threshold, or that the state of a link or channel has fallen below a threshold. When the MAC layer receives an indication from the physical layer that the link is in poor condition, 111 乂: to the layer 111 乂: Show 11 (triggers 3).

The primitive can be transmitted. Yo1: The layer receives the primitive that activates the Yo1: Shoyo from the MAC layer, and through the following procedure, 111: Show11 (3) can be operated again. That is to say, based on the channel state measurement value of the physical layer, if the measurement value is less than the threshold value, the physical layer reports it to the MAC layer, and the MAC layer can report it to the Yo 1: layer. 111乂:Show 11（can enable 3 actions.

[38 is 111乂: Show 11 (3 action enable method can be as follows.

[381] The sidelink transmission terminal

Bit _{0 1} ¾ 0 is set to 1, and Yo1乂: can operate the shoyo. And the receiving terminal that received the polling bit set to 1, 111乂: Mo011 is successfully received. If not received, NACK can be transmitted. The receiving terminal receives the packet transmitted by the transmitting terminal and can perform 111乂:shoyo operation when the polling bit included in the 111乂:all 011 header is set to 1 And, if the receiving terminal successfully receives 111 modules 1) 11 based on the sequence number, it can transmit a show (: to the transmitting terminal) and transmit NACK when the reception fails.

[382] Fig. 36 is a flowchart showing the operation of the terminal according to the embodiment(s) of the present specification.

[383] Referring to Fig. 36, the terminal can perform operation and 111 show 11 (two operations).

There is 3601). Here, 111 show 11 (3 operation is by the operation described in Fig. 34 and Fig. 35). 2020/175955 1» (：1^1{2020/002889 may be triggered action. And the terminal can measure the channel status of the physical layer based on the reference signal 3602). In addition, the terminal has the result of channel status measurement. It can be judged whether it is below the threshold value or whether it is exceeding the threshold value 3603). In addition, when the result of the channel state measurement exceeds the threshold value, the terminal can transmit information of the 111 layer, including information to stop the operation of ^0 show 11 (3604). Here, the information to stop the operation of [Yo]^:Show1«3 may be information included in the polling bit included in Yo]^:All1)11.

[384] Fig. 37 shows the operation of the transmitting terminal and the receiving terminal according to the embodiment(s) of the present specification.

This is a drawing for explanation.

[385] Referring to Figure 37, the transmitting terminal and the receiving terminal

In addition, the transmitting terminal measures the channel state of the physical layer, and if the result value exceeds the threshold value, 111 shows 11 (3 operation is stopped. In addition, the transmitting terminal has a polling bit set to 0 in the receiving terminal) The set request 1): can transmit all 1) 11, and the receiving terminal receives 110 _{^ all} 1) 11

Show 1 «3 operation can be stopped,

The operation can only be performed without transmitting the ACK/NACK for.

[386] 111乂: How to disable the Shoyo operation can be as follows.

[387] According to the floor measurement result, 111乂: Shoyo operation again

We also propose a procedure to make it work.

[388] When the measured value returns above the threshold value, the physical layer may indicate to the MAC layer that the physical layer measurement result is above the threshold value or indicate that the state of the link or channel is above the threshold value.

When the layer receives an instruction from the physical layer that the link status has improved, the layer 111 goes to the layer 111 and stops the show 11 (3

The primitive can be transmitted. Yo1: The layer receives a primitive that causes the MAC layer to stop the operation. Can be stopped.

[389] That is, the sidelink transmission terminal

You can set the polling bit to be activated 0111!¾ ½) to 0 and disable ^0 show 11 (3 operations). And the receiving terminal has successfully received Yo1乂：Mo1）11,

In case of failure, NACK can be transmitted. The sidelink receiving terminal receives the packet transmitted by the sidelink transmitting terminal, and 111乂:11 _£& （If the polling bit included in 1 is set to 0, then 111乂:show 11（3 The operation can be stopped. After that, the sidelink transmitting terminal and the sidelink receiving terminal can only be operated. Here, the setting value of 0 or 1 of the polling bit is illustrative and is not limited thereto.

[39] According to one embodiment(s) of this specification, sidelink terminals can perform or stop ^0show1«3 operation by reflecting the current state of the wireless link or channel. Through this, the protocol overhead or complexity of the NR V2X SL UE can be reduced.

[391] The above embodiment(s) was created around the NR sidelink, but NR 11 ₁₁ (ie, communication between NR gNB) or NR ¥2 (ie, 1® and related to autonomous vehicles) It can also be applied in environments such as 2020/175955 1» (：1^1 {2020/002889 communication between terminals). In other words, the terminal according to the above embodiment(s) is another terminal, a terminal related to an autonomous vehicle, It can mean a terminal that communicates with at least one of a base station or network.

[392]

[393] Examples of the proposed method in the above description and also among the implementation methods of the present invention

It is obvious that they can be included as one, so they can be regarded as some kind of proposal method. In addition, the proposal methods described above may be implemented independently, but may also be implemented in the form of a combination (or merged) of some proposal methods. In the present invention, the proposed method was described based on the 3GPP NR system for convenience of explanation, but the range of the system to which the proposed method is applied can be extended to other systems other than the 3GPP NR system. For example, the proposed methods of the present invention are D2D communication. Here, as an example, D2D communication means that the UE communicates with other UEs using a direct wireless channel, where, as an example, the UE refers to the user's terminal, but network equipment such as a base station In the case of transmitting/receiving signals according to the communication method between the UEs, it can also be regarded as a kind of UE. In addition, as an example, the proposed methods of the present invention may be statically applied to the mode 3 V2X operation (and/or the mode 4 V2X operation). In addition, as an example, the proposed methods of the present invention are previously set (/signaled). It can also be applied statically to (specific) V2X channel (/signal) transmission (for example, PSSCH (and/or (associated) PSCCH and/or PSBCH)). In addition, as an example, the proposed methods of the present invention are PSSCH. And (linked) PSCCH (in the frequency domain) adjacent (ADJACENT) (and/or spaced (NON-ADJACENT)) and transmitted (and/or pre-set (/signaled) MCS (and/or coding rate) And/or RB) (if value (/range))-based transmission is performed), it may be applied statically. In addition, as an example, the proposed methods of the present invention are MODE#3 (and/or MODE#4). V2X CARRIER (and/or (MODE#4 (/3)) SL (/UL) SPS (and/or SL (/UL) DYNAMIC SCHEDULING) CARRIER) can also be applied statically. Also, as an example, the present invention The proposed methods are synchronous signals (sending (and/or receiving)) resource location and/or number (and/or V2X resource pool related subframe location and/or number (and/or subchannel size and/or number) between CARRIERs) ）It may be applied (limitedly) only if (and/or (some) different) the same (and/or (some) different). For example, the proposed methods of the present invention may also be extended and applied to (V2X) communication between a base station and a terminal. The proposed methods of the invention may be applied only to UNICAST (sidelink) communications (and/or MULTICAST (or GROUPCAST) (sidelink) communications and/or BROADCAST (sidelink) communications).

[394]

[395] Tonks I Sisremye to which Bonbamname is applied

[396] The various descriptions, functions, procedures, proposals, methods and/or operational flow charts of the present invention disclosed in this document, but are not limited to this, establish wireless communication/connection (eg 5G) between devices. 2020/175955 1»（：1^1{2020/002889 It can be applied to various fields of need.

[397] Hereinafter, with reference to the drawings, it is illustrated more specifically. In the following drawings/description

The same or corresponding hardware block, software block, or functional block may be illustrated unless the same drawing number is specified differently.

[398] Fig. 38 illustrates a communication system 1 applied to the present invention.

[399] Referring to Figure 38, the communication system (1) applied to the present invention includes a wireless device, a base station, and a network. Here, the wireless device is a wireless access technology (eg, 5G NR (New RAT), LTE ( Long Term Evolution)) refers to a device that performs communication, and can be referred to as a communication/wireless/5G device. Although not limited to this, wireless devices are robots (1_, vehicles (lOOb-l, 100b-2)). ), XR (eXtended Reality) 7] (100c), Hand-held device (100d), Mechanism and Electricity (100e), IoT (Internet of Thing) device (100f),

It may include an AI device/server 400. For example, a vehicle may include a vehicle equipped with a wireless communication function, a self-driving vehicle, a vehicle capable of communicating between vehicles, etc. Here, the vehicle may include UAV (Unmanned Aerial Vehicle) (e.g. drone). XR devices include AR (Augmented Reality)/VR (Virtual Reality)/MR (Mixed Reality) devices, HMD (Head-Mounted Device), HUD (Head-Up Display), TV, smartphone, Computer, wearable device, home appliance, digital

It can be implemented in the form of signage, vehicles, robots, etc.

This can include smartphones, smart pads, wearable devices (e.g. smart watches, smart glasses), computers (e.g. laptops, etc.). Home appliances can include TVs, refrigerators, washing machines, etc. IoT devices may include sensors, smart meters, etc. For example, a base station, network can be implemented as a wireless device, and a specific wireless device 200a can act as a base station/network node to other wireless devices.

[400] The wireless device (100a~100f) can be connected to the network 300 through the base station 200. AI (Artificial Intelligence) technology can be applied to wireless devices (100a~100f), and wireless devices (100a~100f) can be connected to the AI server 400 through 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. Wireless devices (100a~100f) are

It is also possible to communicate via the base station 200 / network 300, but can also communicate directly (eg sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) is a direct communication (eg V2V(Vehicle to

Vehicle)/V2X (Vehicle to everything) communication) In addition, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (W0a~100f).

[401] Radio between 7l (100a~100f)/7l base station (200), base station (200)/base station (200)

Communication/connection (150a, 150b, 150c) can be achieved Here, wireless communication/connection includes uplink/downlink communication 150a and sidelink communication 150b (or, D2D communication), base station communication 150c ( Various wireless connections such as relay, IAB (Integrated Access Backhaul) 2020/175955 1»（：1^1{2020/002889 Can be achieved through technology (eg 5G NR). Wireless devices and base stations/wireless devices, base stations and base stations through wireless communication/connection (150a, 150b, 150c) The base stations transmit wireless signals to each other.

For example, wireless communication/connection (150a, 150b, 150c) can transmit/receive signals through various physical channels. To this end, based on various proposals of the present invention, wireless signals At least some of the process of setting various configuration information for transmission/reception of the device, various signal processing processes (e.g., channel encoding/decoding, modulation/demodulation, resource mapping/demapping, etc.), resource allocation process, etc. can be performed.

[402] Example of a device to which Bon Bam name applies

[403] Fig. 39 shows a wireless device applicable to the present invention.

[404] Referring to FIG. 39, the first wireless device W0 and the second wireless device 200 can transmit and receive wireless signals through various wireless access technologies (eg, LTE, NR). Here, the first wireless device W0 and the second wireless device 200 can transmit and receive wireless signals. The device 100 and the second wireless device 200 may correspond to the "wireless device (100x), base station (200)" and/or "wireless device (100x), wireless device (100x)" in Fig. 38.

[405] The first wireless device 100 includes one or more processors 102 and one or more memories 104, and may additionally include one or more transceivers ₁₀₆ and/or one or more antennas 108. Processor 102 controls memory 104 and/or transceiver 106, and may be configured to implement the descriptions, functions, procedures, suggestions, methods, and/or operational flow charts disclosed in this document.

The processor 102 may process the information in the memory W4 to generate the first information/signal, and then transmit a wireless signal including the first information/signal through the transceiver 106. Further, the processor 102 may store the information obtained from the signal processing of the second information/signal in the memory W4 after receiving the wireless signal including the second information/signal through the transmitter/receiver 106. 104 can be connected with the processor 102,

A variety of information related to the operation of the processor 102 can be stored. For example, the memory 104 may perform some or all of the processes controlled by the processor 102, or the descriptions, functions, and processes disclosed in this document. It is possible to store software code including instructions for performing procedures, proposals, methods and/or operational flow charts, where processor 102 and memory 104 are used to implement wireless communication technologies (e.g., LTE, NR). It may be part of a designed communication modem/circuit/chip. The transceiver 106 can be connected to the processor 102, and can transmit and/or receive wireless signals through one or more antennas (W8). It may include a transmitter and/or a receiver. The transmitter/receiver 106 may be used interchangeably with an RF (Radio Frequency) unit. In the present invention, the wireless device may also mean a communication modem/circuit/chip.

[406] The second wireless device 200 includes one or more processors 202, one or more memories 204, and may additionally include one or more transceivers 206 and/or one or more antennas 208. Processor The 202 controls the memory 204 and/or the transceiver 206 and may be configured to implement the descriptions, functions, procedures, proposals, methods, and/or operational flow diagrams disclosed in this document. 2020/175955 1»（：1^1{2020/002889 The processor 202 processes the information in the memory 204 to generate the third information/signal, and then transmits the third information/signal through the transceiver 206. It can transmit wireless signals including. Further, the processor 202 may store the information obtained from the signal processing of the fourth information/signal in the memory 204 after receiving the wireless signal including the fourth information/signal through the transmitter/receiver 206. 204 can be connected with the processor 202,

A variety of information related to the operation of the processor 202 can be stored. For example, the memory 204 may perform some or all of the processes controlled by the processor 202, or the descriptions, functions, and processes disclosed in this document. It is possible to store software code including instructions for performing procedures, proposals, methods and/or operational flow charts, where processor 202 and memory 204 are used to implement wireless communication technologies (e.g., LTE, NR). It may be part of a designed communication modem/circuit/chip. Transceiver 206 may be connected to processor 202, and may transmit and/or receive wireless signals through one or more antennas 208. Transceiver 206 is capable of transmitting and receiving radio signals. It may include a transmitter and/or receiver. Transmitter/receiver 206 may be used interchangeably with an RF unit. In the present invention, a wireless device may also mean a communication modem/circuit/chip.

[407] Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. Although not limited to this, more than one protocol layer may be implemented by more than one processor (W2, 202); for example, more than one layer of protocol.

Processors 102, 202 are one or more layers (e.g., PHY, MAC, RLC, PDCP, RRC,

One or more processors (102, 202) may implement one or more Protocol Data Units (PDUs) and one or more protocol data units (PDUs) and/or operational flow charts according to the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed in the text. / Or one or more SDUs (Service Data Units) can be created. One or more processors (102, 202) can be used for messages, control information, and data according to the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed in this document. Alternatively, one or more processors (102, 202) may have a signal (e.g., base) containing PDUs, SDUs, messages, control information, data or information in accordance with the functions, procedures, proposals and/or methods disclosed in this document. Band signal), which can be provided to one or more transceivers (W6, 206), one or more processors (102,

202 can receive signals (e.g., baseband signals) from one or more transmitters and receivers 106, 206, and PDUs, SDUs, and PDUs, according to the descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed in this document. You can acquire messages, control information, data or information.

[408] One or more processors (102, 202) can be used as a controller, microcontroller, or microcontroller.

It may be referred to as a processor or microcomputer. One or more processors 102, 202 may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more ASIC (Application Specific Integrated Circuit), one or more DSP (Digital Signal Processor), one or more DSPD (Digital Signal Processing Device), one or more PLD (Programmable Logic Device) or one or more FPGA (Field 2020/175955 1»（：1^1{2020/002889

Programmable Gate Arrays) can be included in one or more processors (102, 202). Descriptions, functions, procedures, proposals, methods and/or operational flow charts disclosed in this document may be implemented using firmware or software, and firmware or software may be implemented to include modules, procedures, functions, etc. Disclosed in this document. Descriptions, functions, procedures, suggestions, methods, and/or operational flow charts are the firmware set to perform or

The software may be contained in one or more processors 102, 202, or stored in one or more memories 104, 204 and run by one or more processors 102, 202. Descriptions, functions, procedures, and suggestions disclosed herein. The method and/or operational flow charts may be implemented using firmware or software in the form of a set of codes, instructions and/or instructions.

[409] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various types of data, signals, messages, information, programs, codes, instructions and/or instructions. One or more memories 104, 204 may consist of ROM, RAM, EPROM, flash memory, hard drive, register, cache memory, computer readable storage medium, and/or combinations thereof. One or more memories 104, 204 It may be located inside and/or outside of one or more processors 102, 202. In addition, one or more memories 104, 204 can be connected to one or more processors 102, 202 through various technologies such as wired or wireless connection. Can be

[410] One or more transmitters and receivers (106, 206) may be connected to one or more other devices.

It can transmit user data, control information, radio signals/channels, etc. mentioned in methods and/or operational flow charts, etc. One or more transmitters and receivers (W6, 206) have the descriptions, functions, procedures, and procedures disclosed in this document from one or more other devices. It can receive user data, control information, radio signals/channels, etc. mentioned in the proposal, method and/or operation flow chart, etc. For example, one or more transceivers 106, 206 may have one or more

It can be connected with the processors 102, 202, and can transmit and receive wireless signals, e.g., one or more processors 102, 202 have one or more transceivers 106, 206 to transmit user data, control information to one or more other devices. Or it can be controlled to transmit wireless signals. In addition, one or more processors (102, 202) can be

Transceivers (W6, 206) can be controlled to receive user data, control information or radio signals from one or more other devices. In addition, one or more transceivers (106, 206) can be connected to one or more antennas (108, 208). , One or more

Transceiver (106, 206) through one or more antennas (108, 208), the user data, control information, radio signal / channel, etc. mentioned in the description, function, procedure, proposal, method and/or operation flow chart disclosed in this document. In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106, 206 may be configured to transmit and receive user data, control information, One or more processors (102,

202) to process the received wireless signal/channel, etc. from the RF band signal. 2020/175955 1»（：1^1{2020/002889 Can be converted to baseband signals. One or more transceivers (106, 206) have user data processed using one or more processors (W2, 202), Control information, radio signals/channels, etc. can be converted from baseband signals to RF band signals. For this purpose, one or more of the transceivers 106 and 206 may include (analog) oscillators and/or filters.

[411] Example of a city call processing circuit to which this name is applied

40 illustrates a signal processing circuit for a transmission signal.

Referring to FIG. 40, the signal processing circuit 1000 includes a scrambler 1010, a modulator 1020, a layer mapper 1030, a precoder 1040, a resource mapper 1050, and a signal generator 1060. Although not limited to this, the operations/functions of FIG. 40 may be performed in the processors 102, 202 and/or the transceivers 106, 206 of FIG. 39. The hardware elements of FIG. 40 are the processors of FIG. 39. (102, 202) and/or the transceivers 106, 206. For example, block 1010 1060 may be implemented in the processor 102, 202 of FIG. 39. Also, block 1010 1050 may be implemented in the processor of FIG. 39 ( 102, 202), and block 1060 may be implemented in the transceiver 106, 206 of FIG.

[414] The code word may be converted into a wireless signal through the signal processing circuit 1000 of FIG. 40. Here, the codeword is a coded bit sequence of the information block. The information block may include a transport block (e.g., a UL-SCH transport block, a DL-SCH transport block). A radio signal is a variety of physical channels (e.g., PUSCH, etc.) PDSCH) can be transmitted.

[415] Specifically, the codeword can be converted into a scrambled bit sequence by the scrambler 1010. The scramble sequence used for scramble is generated based on the initialization value, and the initialization value includes ID information of the wireless device, etc. The scrambled bit sequence can be modulated into a modulation symbol sequence by the modulator 1020. Modulation methods are pi/2-BPSK (pi/2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying). ), m-QAM (m-Quadrature Amplitude Modulation), etc. The complex modulated symbol sequence can be mapped to one or more transmission layers by the layer mapper 1030. The modulation symbols of each transmission layer are precoder 1040. ) Can be mapped to the corresponding antenna port(s) (precoding). The output z of the precoder 1040 can be obtained by multiplying the output y of the layer mapper 1030 by the precoding matrix W of N*M. ,

N is the number of antenna ports, M is the number of transmission layers, where,

The precoder 1040 may perform precoding after performing transform precoding (e.g., DFT conversion) for complex modulation symbols. In addition, the precoder 1040 may perform transform precoding. Precoding can be performed without performing it.

[416] The resource mapper 1050 may map the modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource is a plurality of symbols (eg, CP-OFDMA symbol, DFT-s-OFDMA symbol) in a time domain. ), and may include a plurality of subcarriers in the frequency domain. The signal generator 1060 generates a radio signal from the mapped modulated symbols, and the generated radio signal can be transmitted to another device through each antenna. .for teeth, 2020/175955 1»（：1^1{2020/002889 Signal generator 1060 is an IFFT (Inverse Fast Fourier Transform) module, CP (Cyclic Prefix) inserter, DAC (Digital-to-Analog Converter), frequency up converter (frequency uplink converter), etc.

[417] The signal processing process for the received signal in the wireless device is shown in Figure 40

It can be configured in reverse of the process (1W0~1060). For example, a wireless device (e.g., 100, 200 in Fig. 39) can receive a wireless signal from the outside through an antenna port/transmitter/receiver. The received wireless signal can be converted into a baseband signal through a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. After that, the baseband signal is a resource de-mapper. process,

Postcoding, demodulation, and de-scramble can be performed to restore a codeword. The codeword can be decoded and restored to an original information block. Therefore, a signal processing circuit for a received signal. (Not shown) may include a signal restorer, a resource demapper, a post coder, a demodulator, a descrambler, and a decoder.

[418] Examples of the use of office equipment to which Bonbamname is applied

[419] Fig. 41 shows another example of a wireless device applied to the present invention.

It can be implemented in various forms depending on the use-example/service (see Fig. 38).

[42] Referring to FIG. 41, the wireless devices 100 and 200 refer to the wireless devices 100 and 200 of FIG.

Correspondingly, various elements (element), component (component), unit / unit (unit), and / or may be composed of a module (module). For example, the wireless devices (100, 200) is a communication unit (110), A control unit 120, a memory unit 130, and an additional element 140 may be included. The communication unit may include a communication circuit 112 and a transceiver(s) 114. For example, the communication circuit 112 May include one or more processors 102, 202 and/or one or more memories 104, 204 of FIG. 39. For example, the transceiver(s) 114 may include one or more of the processors 102, 202 of FIG.

Transceivers 106,206 and/or one or more antennas 108,208 may be included.

The control unit 120 is electrically connected to the communication unit 110, the memory unit 130, and the additional element 140 and controls all operations of the wireless device. For example, the control unit 120

The electrical/mechanical operation of the wireless device can be controlled based on the program/code/command/information stored in the memory unit 130. In addition, the control unit 120 transmits information stored in the memory unit 130 to the communication unit (1W). The information received through a wireless/wired interface is transmitted to an external (e.g., other communication device) through a wireless/wired interface or from an external (e.g., other communication device) through the communication unit (110). Can be stored in

[421] The additional element 140 can be configured in various ways depending on the type of wireless device.

For example, the additional element 140 may include at least one of a power unit/battery, an I/O unit, a driving unit and a computing unit. Although not limited to this, the wireless device may be a robot (Figs. 38, 100A), Vehicles (Figs. 38, 100b-1, 100b-2), XR devices (Figs. 38, 100c), portable devices (Figs. 38, 100d), home appliances (Figs. 38, 100e), IoT devices (Figs. 38, 100f), digital Broadcasting Terminal, 2020/175955 1»（：1^1{2020/002889 Hologram device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate/environment device, AI server/device (Fig. 38, 400), base stations (Figs. 38, 200), network nodes, etc. Wireless devices can be movable or used in fixed places depending on use-example/service.

[422] In FIG. 41, various elements, components, units/parts, and/or modules in the wireless devices (100, 200) are all connected to each other through a wired interface, or at least some parts are wirelessly connected through a communication unit (1 W). Can be connected, e.g. within a wireless device (100, 200)

The control unit 120 and the communication unit (no) are connected by wire, and the control unit 120 and the first unit (e.g.,

130, 140 may be connected wirelessly through the communication unit 110. In addition, each element, component, unit/part, and/or module in the wireless device 100, 200 may further include one or more elements. For example, the control unit 120 may be composed of a set of one or more processors. For example, the control unit 120 is a communication control processor, an application

It can be composed of a set of processor (Application processor), ECU (Electronic Control Unit), graphics processing processor, memory control processor, etc. As another example, the memory unit 130 is a RAM (Random Access Memory), DRAM (Dynamic RAM) , ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory, and/or combinations thereof.

[423] Hereinafter, an embodiment of FIG. 41 will be described in more detail with reference to the drawings.

[424] Examples of mobile devices to which Bonn Bam name applies

[425] Figure 42 illustrates a portable device applied to the present invention. The portable device may include a smart phone, a smart pad, a wearable device (eg, a smart watch, a smart glass), a portable computer (eg, a notebook, etc.). Mobile devices may be referred to as MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), or WT (Wireless terminal).

[426] Referring to FIG. 42, the portable device 100 includes an antenna unit 108, a communication unit 110, a control unit 120, a memory unit 130, a power supply unit 140a, an interface unit 140b, and input/output It may include a part 140c. The antenna part 108 may be configured as a part of the communication part H0. Blocks 110 to 130/140a to 140c correspond to blocks 110 and 130/140 of 41, respectively.

[427] The communication unit 110 can transmit and receive signals (eg, data, control signals, etc.) with other wireless devices and base stations. The control unit 120 controls components of the mobile device 100 to perform various operations. The control unit 120 may include an application processor (AP). The memory unit 130 is required to drive the mobile device 100.

Data/parameters/programs/codes/commands can be stored. In addition, the memory unit 130 can store input/output data/information, etc. The power supply unit 140a supplies power to the portable device 100. And may include wired/wireless charging circuits, batteries, etc. The interface unit 140b may support connection between the portable device 100 and other external devices. The interface unit 140b provides various ports (e.g., audio) for connection with an external device. 2020/175955 1» (：1^1{2020/002889 input/output port, video input/output port) can be included. Input/output unit 140c includes video information/signal, audio information/signal, data, and/ Alternatively, information input from the user may be input or output. The input/output unit 140c may include a camera, a microphone, a user input unit, a display unit 140d, a speaker, and/or a haptic module.

[428] For example, in the case of data communication, the input/output unit 140c

It acquires information/signals (eg, touch, text, voice, image, video), and the acquired information/signal can be stored in the memory unit 130. The communication unit H0 transfers the information/signals stored in the memory to a wireless signal. In addition, the communication unit (H0) can transmit the converted wireless signal to other wireless devices directly or to the base station.

After receiving the wireless signal from the base station, the received wireless signal can be restored to the original information/signal. The restored information/signal is stored in the memory unit 130 and then

Through the input/output unit 140c, various forms (eg, text, voice, image, video, and heptic) can be displayed.

[429] Examples of vehicles to which Bonn Bam name applies or vehicles to park in Ja-eup

[43] Figure 43 illustrates a vehicle or an autonomous vehicle applied to the present invention. A vehicle or an autonomous vehicle may be implemented as a mobile robot, vehicle, train, manned/unmanned vehicle (Aerial Vehicle, AV), or a ship.

[431] Referring to FIG. 43, the vehicle or autonomous vehicle 100 includes 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 140d may be included. The antenna unit 108 is a part of the communication unit H0. Blocks 110/130/140a-140d correspond to blocks 110/130/140 of 41, respectively.

[432] The communication unit 110 can transmit and receive signals (eg, data, control signals, etc.) with other vehicles, base stations (e.g. base stations, roadside units, etc.), and external devices such as servers. The control unit 120 may control elements of the vehicle or the autonomous vehicle 100 to perform various operations. The control unit 120 may include an ECU (Electronic Control Unit). The driving unit 140a is a vehicle or autonomously driving vehicle 100. The vehicle 100 can be driven on the ground. The driving unit 140a may include an engine, a motor, a powertrain, a wheel, a brake, a steering device, and the like. The power supply unit 140b is provided to the vehicle or autonomous vehicle 100. It supplies power, and may include wired/wireless heavy electrical circuits, batteries, etc. The sensor unit 140c can obtain vehicle status, surrounding environment information, user information, etc. The sensor unit 140c is

IMU(inertial measurement unit) sensor, middle stone sensor, wheel sensor, speed sensor, inclination sensor, weight detection sensor, heading sensor, position module, vehicle forward/reverse sensor, battery sensor , Fuel sensor, tire sensor, steering sensor, temperature sensor, humidity sensor, ultrasonic sensor, illuminance sensor, pedal position sensor, etc. The autonomous driving unit 140d is a technology that maintains a driving lane, amaptive cruise control. As such, it is possible to implement a technology that automatically adjusts the speed, a technology that automatically runs along a specified path, and a technology that automatically sets a path when a destination is set and runs. 2020/175955 1»（：1^1{2020/002889

[433] As an example, the communication unit 110 may receive map data, traffic information data, etc. from an external server. The autonomous driving unit 140(1) may create an autonomous driving route and a driving plan based on the acquired data. According to the driving plan, the control unit 120 moves the vehicle or the autonomous vehicle 100 along the interest rate driving path.

Driving part (140 幻 can be controlled (e.g. speed/direction control). During autonomous driving

The communication unit (0) non/periodically obtains the latest traffic information data from an external server, and can obtain surrounding traffic information data from nearby vehicles. In addition, the sensor unit (14) during autonomous driving is the vehicle status and surrounding light information. The autonomous driving unit 140(1) can update the autonomous driving route and driving plan based on the newly acquired data/information. The communication department (0) can obtain the vehicle location, autonomous driving route, driving plan, etc. Information can be transferred to an external server. The external server can predict traffic information data in advance using city technology, etc., based on information collected from vehicles or autonomous vehicles, and can transmit the predicted traffic information data to the vehicle or autonomously. Can be provided to driving vehicles

[435] Fig. 44 illustrates a vehicle applied to the present invention. The vehicle can be implemented as a means of transport, a train, a vehicle, a ship, and the like.

Referring to FIG. 44, the vehicle 100 may include a communication unit 110, a control unit 120, a memory unit 130, an input/output unit 140 and a position measuring unit 140 ratio. Here, the block

110~130/14 (切~14015 corresponds to block 110 130/140 of 41, respectively.

[437] The communication unit (0) can transmit and receive signals (eg, data, control signals, etc.) with other vehicles or external devices such as base stations. The control unit 120 controls the components of the vehicle 100 to perform various operations. The memory unit 130 can store data/parameters/programs/codes/commands supporting various functions of the vehicle 100.

Input/output unit (140幻 is based on the information in the memory unit 130)

The object can be output. The input/output unit (140幻 can include 111 type. The position measurement unit (140) can obtain the location information of the vehicle 100. The location information is the absolute location information of the vehicle 100, It can include location information, acceleration information, location information with nearby vehicles, etc. Position measurement unit (140 ratio can include 0-8 and various sensors.

As an example, the communication unit 110 of the vehicle 100 may receive map information, traffic information, etc. from an external server and store it in the memory unit 130. The location measurement unit (140 ratio is 0 to 8 and various types) The vehicle location information can be acquired through the sensor and stored in the memory unit 130. The control unit 120 creates a virtual object based on map information, traffic information, and vehicle location information, and the input/output unit 140 is the generated virtual object. Objects can be displayed on the window of the vehicle (1410, 1420). In addition, the control unit 120 can determine whether the vehicle 100 is running normally in the driving ship based on the vehicle location information. If it deviates abnormally, the control unit 120 may display a warning on the window of the vehicle through the input/output unit 140. In addition, 2020/175955 1»（：1^1{2020/002889 The control unit 120 can broadcast a warning message about driving abnormalities to nearby vehicles through the communication unit (no). Depending on the situation, the control unit 120 is the communication unit) Through (H0), information on the location of the vehicle and information on the driving/vehicle can be transmitted to the relevant agencies.

[439] Examples of XR devices to which Bonbamname is applied

[440] Figure 45 illustrates an XR device applied to the present invention. XR devices can be implemented with HMD, head-up display (HUD) provided in vehicles, televisions, smartphones, computers, wearable devices, home appliances, digital signage, vehicles, and robots.

[441] Referring to Figure 45, the XR device (100a) includes a communication unit (110), a control unit (120), a memory unit (130), an input/output unit (140a), a sensor unit (140b) and a power supply unit (140c) Here, blocks 110-130/140a-140c correspond to blocks 110-130/140 of 41, respectively.

[442] The communication unit (110) is an external device such as other wireless devices, portable devices, or media servers.

It can transmit and receive signals (e.g., media data, control signals, etc.) with devices. The media data may include images, images, sounds, etc. The control unit 120 is XR

Various operations can be performed by controlling the components of the device 100a. For example, the controller 120 controls and/or processes processes such as video/image acquisition, (video/image) encoding, and metadata generation and processing. Or it can be configured to perform. The memory unit 130 is required to drive the XR device 100a / create an XR object.

Data/parameters/programs/codes/commands can be stored. The input/output unit ₍₁ 40a) obtains control information and data from the outside, and can output the generated XR object. The input/output unit 140a is a camera and a microphone. , A user input unit, a display unit, a speaker and/or a haptic module, etc. The sensor unit 140b can obtain XR device status, surrounding environment information, user information, etc. The sensor unit 140b is a proximity sensor, illuminance. Sensors, acceleration sensors, magnetic sensors, gyro sensors, inertial sensors, RGB sensors, IR sensors, fingerprint recognition sensors, ultrasonic sensors, optical sensors, microphones and/or radars. Power supply unit 140c is an XR device It supplies power to 100a), and may include wired/wireless charging circuits, batteries, etc.

[443] As an example, the memory unit 130 of the XR device 100a is an XR object (eg, ARAVR/MR

It can contain information (eg, data, etc.) necessary for the creation of an object).

The input/output unit 140a can obtain a command for operating the XR device 100a from the user, and the control unit 120 can drive the XR device 100a according to the user's driving command. For example, the user can drive the XR device 100a. When attempting to watch movies, news, etc. through the device 100a, the control unit 120 may transmit the content request information to another device (eg, a mobile device 100b) or a media server through the communication unit 130. The communication unit 130 may download/stream content such as movies and news from another device (e.g., a portable device (WOb)) or a media server to the memory unit 130. The control unit 120 receives video/images for the content. Controls and/or performs procedures such as acquisition, (video/image) encoding, and metadata generation/processing, and is based on information about the surrounding space or real objects acquired through the input/output unit 140a/sensor unit 140b. To create/output XR objects 2020/175955 1»（：1^1{2020/002889 There is.

[444] In addition, XII devices (100 units are mobile devices via the Ministry of Communications (110))

It is connected, and the operation of the XII device (100幻) can be controlled by the portable device (10A5). For example, the mobile device (10015) can operate as a controller for the XII device (100幻. For this purpose, XII) After acquiring the 3D location information of the device (100 幻), it is possible to create and output XII objects corresponding to the mobile device (10 yrs5).

[445] A road to which the name of Bonbam is applied

[446] Fig. 46 illustrates a robot applied to the present invention. Robots can be classified into industrial, medical, household, military, etc. depending on the purpose or field of use.

[447] Referring to Figure 46, the robot 100 is a communication unit 110, the control unit 120, the memory unit 130,

The input/output unit 140, the sensor unit 140 and the drive unit 14 may be included. Here, blocks 110 to 130/14 (切 to 14) correspond to blocks 110 and 130/140 of 41, respectively.

The communication unit 110 can transmit and receive signals (eg, driving information, control signals, etc.) with other wireless devices, other robots, or external devices such as a control server.

By controlling the components of the robot 100, it is possible to perform various operations.

The memory unit 130 supports various functions of the robot 100.

Data/parameters/programs/codes/commands can be stored I/O unit ₍₁ 40°) obtains information from the outside of the robot 100 and can output information to the outside of the robot 100. I/O unit (140 units) May include a camera, a microphone, a user input unit, a display unit, a speaker and/or a haptic module, etc. A sensor unit (140 is able to obtain internal information of the robot 100, information about a peripheral environment, user information, etc. Sensor unit) (140 ratio may include proximity sensor, illumination sensor, acceleration sensor, magnetic sensor, gyro sensor, inertial sensor, III sensor, fingerprint recognition sensor, ultrasonic sensor, light sensor, microphone, radar, etc.

The drive unit 14 can perform various physical movements such as moving the robot joint. In addition, the drive unit 14 can make the robot 100 run on the ground or fly in the air. The drive unit 140 is an actuator, a motor, and so on. , Wheels, brakes, propellers, etc.

[449] Examples of the period when the name of the bosom name is applied

[45] Figure 47 illustrates the timing period applied to the present invention. The timing period is IV, projector, smartphone, 1 (, laptop, digital broadcasting terminal, tablet 1 (, wearable device, set-top box 16), radio, washing machine, refrigerator It can be implemented as a fixed device, such as a digital signage, a robot, a vehicle, or a mobile device.

[451] Referring to FIG. 47, the timing device 100 includes a communication unit 110, a control unit 120, a memory unit 130, an input/output unit 1403/14A5, and a running processor unit 14(切And a sensor unit 140(1). Blocks 110 to 130/14 (切 to 140 (1) correspond to blocks 110 and 130/140 of 41, respectively.

[452] The communication unit 110 uses wired/wireless communication technology to communicate with external devices such as other devices (eg, Figs. 38, 100, 200, 400) and wired/wireless signals (eg, 400 in Fig. 38). Sensor information, user input, learning model, control signal, etc.) can be transmitted and received. 2020/175955 1» (: 1^1{2020/002889) The communication unit (0) can transmit information in the memory unit 130 to an external device, or transmit a signal received from the external device to the memory unit 130.

The control unit 120 may determine at least one executable operation of the timing unit (^0) based on information determined or generated using a data analysis algorithm or a machine learning algorithm. And, the control unit 120 ) Can perform a determined operation by controlling the components of the timing device 100. For example, the control unit 120 may request, search, and receive data from the learning processor unit 14 (or memory unit 130). Alternatively, it is possible to control the components of the timing device 100 to perform an action that is available, and at least one of the possible actions that are predicted or that is judged to be desirable. In addition, the control unit 120 is the viewing device 100. Collects the history information including the user's feedback on the operation content or operation of the memory unit 130 or the learning processor unit 14 (stored, or transmitted to an external device such as a city server (Figs. 38, 400) The collected historical information can be used to update the learning model.

The memory unit 130 may store data supporting various functions of the timing device 100. For example, the memory unit 130 may store data obtained from the input unit 140,

The data obtained from the communication unit 0, the learning processor unit 14 (output data, and data obtained from the sensing unit 140) can be stored. In addition, the memory unit 130 is used for the operation/execution of the control unit 120. The necessary control information and/or software code can be stored.

[455] The input unit 140 can acquire various types of data from the outside of the timing device 100. For example, the input unit 140 stores learning data for model learning, and input data to which the learning model is applied. The input unit 140 may include a camera, a microphone and/or a user input unit. The output unit 140 may generate an output related to the visual, audible or tactile sense. The output unit 140 is a display unit. , A speaker and/or a haptic module, etc. The sensing unit 140 can obtain at least one of internal information of the device 100, information of the peripheral environment of the device 100, and user information by using various sensors. The sensing unit 140 is a proximity sensor, illuminance sensor, acceleration sensor, magnetic sensor, gyro sensor, inertial sensor, 1 36 sensor, ^ sensor, fingerprint recognition sensor, ultrasonic sensor, optical sensor, microphone and/or radar. Can include

[456] Learning processor unit (14) can train a model composed of an artificial neural network using the learning data. The running processor unit 140 performs sea processing together with the running processor unit of the city server (Figs. 38 and 400). The running processor unit 14 can process information received from an external device through the communication unit 0 and/or the information stored in the memory unit 130. In addition, the running processor unit 14 can process the information stored in the memory unit 130. The output value may be transmitted to an external device through the communication unit 0 and/or may be stored in the memory unit 130.

Industrial availability 2020/175955 1»（：1/10公020/002889

[457] Embodiments as described above can be applied to various mobile communication systems.

Claims

2020/175955 1»（：1/10公020/002889 Claims

[Claim 1] In the method of transmitting and receiving a signal for a first terminal in a wireless communication system,

Receiving a PSCCH (Physical Sidelink Control Channel) including SCI (Sidelink Control Information) from the second terminal; Including a reference signal based on the SCI from the second terminal

Receiving a PSSCH (Physical Sidelink Shared Channel); performing a channel state measurement based on the reference signal; And

Transmitting RLC (Radio Link Control) layer information to the second terminal; Including,

Based on that the result of the channel state measurement is less than or equal to a threshold value, the information of the RLC verification includes information for triggering an RLC ARQ (Automatic Repeat Request) operation.

[Claim 2] The method of claim 1,

The method further comprising the step of receiving ACK (Acknowledgement) or NACK (Negative-ACK) information for the information of the RLC layer from the second terminal based on the result of the channel state measurement being less than the threshold value.

[Claim 3] The method of claim 1,

The information of the RLC layer is an RLC Protocol Data Unit (PDU).

[Claim 4] In paragraph 3,

The RLC PDU includes an RLC header,

The RLC header includes information for triggering the RLC ARQ operation.

[Claim 5] The method of claim 4,

The RLC header includes a polling bit of 1 bit,

Based on the result of the channel state measurement being less than the threshold value, the polling bit is set to 1,

Based on that the result of the channel state measurement exceeds a threshold value, the polling bit is set to 0.

[Claim 6] The method of claim 1,

Based on the result of the channel state measurement exceeding the threshold value, the information of the RLC layer includes information for stopping the RLC ARQ operation.

[Claim 7] The method of claim 1,

Further comprising the step of performing a HARQ (Hybrid-ARQ) operation for the PSSCH, the method.

[Claim 8] The method of claim 1,

To determine whether the result of the channel state measurement is below the threshold 2020/175955 1»（：1^1{2020/002889, method.

[Claim 9] In a wireless communication system,

At least one processor; and

It may be operatively connected to the at least one processor, and includes at least one computer memory storing instructions for causing the at least one processor to perform current operations when executed, the operations being SCI( Receiving a PSCCH (Physical Sidelink Control Channel) including Sidelk Control Information); Including a reference signal based on the SCI from the second terminal

Transmitting information of a Radio Link Control (RLC) layer to the second terminal; Including,

Based on the result of the channel state measurement being equal to or less than a threshold value, the RLC verification information includes information for triggering an RLC ARQ (Automatic Repeat Request) operation.

[Claim 10] When executed by at least one processor, at least one processor

In a computer-readable storage medium that stores at least one computer program including an instruction to perform operations for a UE, the operations are PSCCH (Physical Sidelink) including Sidelk Control Information (SCI) from a second terminal. Control Channel); Including a reference signal based on the SCI from the second terminal

Based on the result of the channel state measurement being less than or equal to a threshold value, the RLC verification information includes information for triggering an RLC Automatic Repeat Request (ARQ) operation.

[Claim 11] The method of claim 9,

The first terminal communicates with at least one of another terminal, a terminal related to an autonomous vehicle, or a base station or a network.