KR20210017963A - Apparatus and method for handling collision of transmissions in wireless communication system - Google Patents

Abstract

The present disclosure relates to a 5th generation (5G) or pre-5G communication system for supporting a higher data transmission rate, which is subsequent to the 4th generation (4G) system such as long-term evolution (LTE). According to the present invention, an operation method of a terminal for handling a collision of transmissions in a wireless communication system comprises the steps of: determining a priority between uplink (UL) data and sidelink data; transmitting one of the UL data and the sidelink data, which has a higher priority; and dropping remaining data of the uplink data and the sidelink data or transmitting the remaining data at a lower transmission power than that when the remaining data is determined to have a higher priority.

Description

Apparatus and method for handling collision of transmissions in a wireless communication system {APPARATUS AND METHOD FOR HANDLING COLLISION OF TRANSMISSIONS IN WIRELESS COMMUNICATION SYSTEM}

TECHNICAL FIELD This disclosure relates generally to wireless communication systems, and more particularly to apparatus and methods for handling collisions of transmissions in a wireless communication system.

4G (4 ^th generation) to meet the traffic demand in the radio data communication system increases since the commercialization trend, efforts to develop improved 5G (5 ^th generation) communication system, or pre-5G communication system have been made. For this reason, the 5G communication system or the pre-5G communication system is called a Beyond 4G Network communication system or a Long Term Evolution (LTE) system (Post LTE) system.

In order to achieve a high data rate, the 5G communication system is being considered for implementation in the ultra-high frequency (mmWave) band (for example, the 60 gigabyte (60 GHz) band). In order to mitigate the path loss of radio waves in the ultra-high frequency band and increase the transmission distance of radio waves, in 5G communication systems, beamforming, massive MIMO, and Full Dimensional MIMO (FD-MIMO) ), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.

In addition, in order to improve the network of the system, in 5G communication system, advanced small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network , Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, CoMP (Coordinated Multi-Points), and interference cancellation And other technologies are being developed.

In addition, in the 5G system, the advanced coding modulation (Advanced Coding Modulation, ACM) method of FQAM (Hybrid Frequency Shift Keying and Quadrature Amplitude Modulation) and SWSC (Sliding Window Superposition Coding), and advanced access technology, FBMC (Filter Bank Multi Carrier) ), NOMA (Non Orthogonal Multiple Access), and SCMA (Sparse Code Multiple Access) are being developed.

In addition, vehicle communication (vehicle-to-everything, hereinafter'V2X') using a 5G communication system is being studied, and it is expected that V2X can be used to provide users with various services.

Based on the discussion as described above, the present disclosure provides an apparatus and method for determining the priority of data transmission between transmission and sidelink transmission in a wireless communication system.

In addition, the present disclosure provides an apparatus and method for setting the priority of data transmission between uplink transmission and sidelink transmission in a wireless communication system.

According to various embodiments of the present disclosure, a method of operating a terminal in a wireless communication system includes a process of determining a priority between uplink data and sidelink data, and having a higher priority among the uplink data and the sidelink data. A process of transmitting one piece of data may include a process of transmitting the remaining data of the uplink data and the sidelink data with a lower transmission power compared to a case where the remaining data of the uplink data and the sidelink data is dropped or the remaining data is determined to have a higher priority.

According to various embodiments of the present disclosure, in a wireless communication system, a terminal includes a transceiver and at least one processor connected to the transceiver. The at least one processor determines a priority between uplink data and sidelink data, transmits one data having a higher priority among the uplink data and the sidelink data, and transmits the uplink data and the sidelink data. The remaining data among the link data may be dropped or transmitted with lower transmission power compared to a case where the remaining data is determined to be of high priority.

An apparatus and method according to various embodiments of the present disclosure may effectively resolve collisions between transmissions.

The effects obtainable in the present disclosure are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the technical field to which the present disclosure belongs from the following description. will be.

1 illustrates a wireless communication system according to various embodiments of the present disclosure.
2 illustrates a configuration of a base station in a wireless communication system according to various embodiments of the present disclosure.
3 illustrates a configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure.
4 illustrates a configuration of a communication unit in a wireless communication system according to various embodiments of the present disclosure.
5 illustrates a structure of a radio time-frequency resource of a wireless communication system according to various embodiments of the present disclosure.
6A to 6D illustrate examples of scenarios for sidelink communication in a wireless communication system according to various embodiments of the present disclosure.
7A and 7B illustrate examples of a method of transmitting sidelink communication in a wireless communication system according to various embodiments of the present disclosure.
8A to 8G illustrate data combinations transmitted through an uplink or a sidelink in a wireless communication system according to various embodiments of the present disclosure.
9A is a flowchart illustrating a terminal for transmitting data according to priority in a wireless communication system according to various embodiments of the present disclosure.
9B is another flowchart of a terminal transmitting data according to priority in a wireless communication system according to various embodiments of the present disclosure.
10A to 10E are flowcharts of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure.
11A through 11D are flowcharts of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure.
12A to 12D are flowcharts of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure.
13A and 13B are flowcharts of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure.

Terms used in the present disclosure are used only to describe a specific embodiment, and may not be intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as commonly understood by one of ordinary skill in the technical field described in the present disclosure. Among terms used in the present disclosure, terms defined in a general dictionary may be interpreted as having the same or similar meanings as those in the context of the related technology, and unless explicitly defined in the present disclosure, an ideal or excessively formal meaning It is not interpreted as. In some cases, even terms defined in the present disclosure cannot be interpreted to exclude embodiments of the present disclosure.

In various embodiments of the present disclosure described below, a hardware approach is described as an example. However, since various embodiments of the present disclosure include technology using both hardware and software, various embodiments of the present disclosure do not exclude a software-based approach.

Hereinafter, the present disclosure relates to an apparatus and method for selecting a resource in a wireless communication system. Specifically, the present disclosure is for selecting a transmission resource of a terminal in sidelink communication between a terminal and a terminal, and when a plurality of resource pools for sidelink communication are configured, at least one resource for performing communication It relates to a method and apparatus for selecting a pool.

In the following description, a term referring to a signal, a term referring to a channel, a term referring to control information, a term referring to network entities, a term referring to a component of a device, etc. are for convenience of description. It is illustrated. Accordingly, the present disclosure is not limited to terms to be described later, and other terms having an equivalent technical meaning may be used.

In the following description, a physical channel and a signal may be used in combination with data or control signals. For example, a physical downlink shared channel (PDSCH) is a term that refers to a physical channel through which data is transmitted, but the PDSCH may also be used to refer to data. That is, in the present disclosure, the expression'transmitting a physical channel' may be interpreted equivalently to the expression'transmitting data or signals through a physical channel'.

Hereinafter, in the present disclosure, higher signaling refers to a signal transmission method transmitted from a base station to a terminal using a downlink data channel of a physical layer, or from a terminal to a base station using an uplink data channel of a physical layer. Higher level signaling may be understood as radio resource control (RRC) signaling or media access control (MAC) control element (CE).

In addition, in the present disclosure, in order to determine whether a specific condition is satisfied or satisfied, an expression exceeding or less than is used, but this is only a description for expressing an example, and more or less descriptions are excluded. Not to do. Conditions described as'greater than' may be replaced with'greater than', conditions described as'less than' may be replaced with'less than', and conditions described as'more and less' may be replaced with'greater than and less'

In addition, the present disclosure describes various embodiments using terms used in some communication standards (eg, 3rd Generation Partnership Project (3GPP)), but this is only an example for description. Various embodiments of the present disclosure may be easily modified and applied to other communication systems.

1 illustrates a wireless communication system according to various embodiments of the present disclosure. 1 illustrates a base station 110, a terminal 120, and a terminal 130 as some of nodes using a radio channel in a wireless communication system. 1 shows only one base station, but another base station that is the same as or similar to the base station 110 may be further included.

The base station 110 is a network infrastructure that provides wireless access to the terminals 120 and 130. The base station 110 has coverage defined as a certain geographic area based on a distance at which a signal can be transmitted. In addition to the base station, the base station 110 includes'access point (AP)','eNodeB, eNB', '5G node', and'next generation nodeB. , gNB)','wireless point','transmission/reception point (TRP)', or another term having an equivalent technical meaning.

Each of the terminal 120 and the terminal 130 is a device used by a user and performs communication with the base station 110 through a radio channel. The link from the base station 110 to the terminal 120 or the terminal 130 is a downlink (DL), and the link from the terminal 120 or the terminal 130 to the base station 110 is an uplink (UL) ). In addition, the terminal 120 and the terminal 130 may communicate with each other through a radio channel. In this case, the link between the terminal 120 and the terminal 130 is referred to as a sidelink, and the sidelink may be mixed with the PC5 interface. In some cases, at least one of the terminal 120 and the terminal 130 may be operated without user involvement. That is, at least one of the terminal 120 and the terminal 130 is a device that performs machine type communication (MTC) and may not be carried by a user. Each of the terminal 120 and the terminal 130 is a terminal other than'user equipment (UE)','mobile station','subscriber station', and'remote terminal. )','wireless terminal', or'user device', or another term having an equivalent technical meaning.

The base station 110, the terminal 120, and the terminal 130 may transmit and receive radio signals in a millimeter wave (mmWave) band (eg, 28 GHz, 30 GHz, 38 GHz, 60 GHz). In this case, in order to improve the channel gain, the base station 110, the terminal 120, and the terminal 130 may perform beamforming. Here, beamforming may include transmission beamforming and reception beamforming. That is, the base station 110, the terminal 120, and the terminal 130 may impart directivity to a transmitted signal or a received signal. To this end, the base station 110 and the terminals 120 and 130 may select the serving beams 112, 113, 121, and 131 through a beam search or beam management procedure. . After the serving beams 112, 113, 121, 131 are selected, subsequent communication may be performed through a resource having a quasi-co-located (QCL) relationship with the resource transmitting the serving beams 112, 113, 121, 131. have.

If large-scale characteristics of the channel carrying the symbol on the first antenna port can be inferred from the channel carrying the symbol on the second antenna port, the first antenna port and the second antenna port are in a QCL relationship. Can be evaluated. For example, a wide range of characteristics include delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial receiver parameter. It may include at least one of.

The terminal 120 and the terminal 120 shown in FIG. 1 may support vehicle communication. In the case of vehicle communication, in the LTE system, standardization work on V2X technology based on device-to-device (D2D) communication structure was completed in 3GPP Release 14 and Release 15, and V2X technology is currently based on 5G NR. Efforts to develop are underway. NR V2X plans to support unicast communication, groupcast (or multicast) communication, and broadcast communication between the terminal and the terminal. In addition, unlike LTE V2X, which aims to transmit and receive basic safety information necessary for vehicle driving on the road, NR V2X provides platforming, advanced driving, extended sensor, and remote driving. Together, it aims to provide more advanced services.

V2X service can be divided into basic safety service and advanced service. The basic safety services include vehicle notification (CAM (cooperative awareness messages) or BSM (basic safety message)) service, left turn notification service, front vehicle collision warning service, emergency vehicle approach notification service, front obstacle warning service, intersection signal information. A detailed service such as a service may be included, and V2X information may be transmitted and received using a broadcast, unicast, or groupcast transmission method. The advanced service not only strengthens the quality of service (QoS) requirements than the basic safety service, but also unicasts in addition to broadcast so that V2X information can be transmitted and received within a specific vehicle group or V2X information between two vehicles. And a scheme for transmitting and receiving V2X information using a groupcast transmission scheme. Advanced services may include detailed services such as platoon driving service, autonomous driving service, remote driving service, and extended sensor-based V2X service.

Hereinafter, a sidelink (SL) refers to a signal transmission/reception path between the terminal and the terminal, which can be mixed with the PC5 interface. Hereinafter, a base station is a subject that performs resource allocation of a terminal, and may be a base station supporting both V2X communication and general cellular communication, or a base station supporting only V2X communication. That is, the base station may mean an NR base station (eg, gNB), an LTE base station (eg, eNB), or a road site unit (RSU). The terminal is a vehicle that supports vehicle-to-vehicular communication (V2V), as well as general user equipment and mobile stations, and vehicle-to-pedestrian communication (vehicular-to-pedestrian, V2P). ) Supporting vehicle or pedestrian's handset (e.g. smartphone), vehicle supporting vehicle-to-network communication (vehicular-to-network, V2N), or vehicle-to-transportation infrastructure (vehicular-to-infrastructure) , V2I) support vehicle and an RSU equipped with a terminal function, an RSU equipped with a base station function, or a part of the base station function and an RSU equipped with a part of the terminal function may be included. In addition, the V2X terminal used in the following description may be referred to as a terminal. That is, in relation to V2X communication, the terminal can be used as a V2X terminal.

The base station and the terminal are connected through the Uu interface. Uplink (UL) refers to a radio link through which the UE transmits data or control signals to the base station, and downlink (DL) refers to a radio link through which the base station transmits data or control signals to the UE.

2 illustrates a configuration of a base station in a wireless communication system according to various embodiments of the present disclosure. The configuration illustrated in FIG. 2 can be understood as the configuration of the base station 110. Terms such as'?? unit' and'?? group' used hereinafter refer to units that process at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

Referring to FIG. 2, the base station includes a wireless communication unit 210, a backhaul communication unit 220, a storage unit 230, and a control unit 240.

The wireless communication unit 210 performs functions for transmitting and receiving signals through a wireless channel. For example, the wireless communication unit 210 performs a function of converting between a baseband signal and a bit stream according to the physical layer standard of the system. For example, when transmitting data, the wireless communication unit 210 generates complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the wireless communication unit 210 restores the received bit stream through demodulation and decoding of the baseband signal.

In addition, the wireless communication unit 210 up-converts the baseband signal into a radio frequency (RF) band signal and transmits it through an antenna, and down-converts the RF band signal received through the antenna into a baseband signal. To this end, the wireless communication unit 210 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a digital to analog convertor (DAC), an analog to digital convertor (ADC), and the like. In addition, the wireless communication unit 210 may include a plurality of transmission/reception paths. Further, the wireless communication unit 210 may include at least one antenna array composed of a plurality of antenna elements.

In terms of hardware, the wireless communication unit 210 may be composed of a digital unit and an analog unit, and the analog unit includes a plurality of sub-units according to operating power, operating frequency, etc. It can be composed of. The digital unit may be implemented with at least one processor (eg, a digital signal processor (DSP)).

The wireless communication unit 210 transmits and receives signals as described above. Accordingly, all or part of the wireless communication unit 210 may be referred to as a'transmitter', a'receiver', or a'transceiver'. In addition, in the following description, transmission and reception performed through a wireless channel are used to mean that the above-described processing is performed by the wireless communication unit 210.

The backhaul communication unit 220 provides an interface for performing communication with other nodes in the network. That is, the backhaul communication unit 220 converts the bit stream transmitted from the base station to another node, for example, another access node, another base station, an upper node, a core network, etc., into a physical signal, and converts a physical signal received from another node. Convert to bit string.

The storage unit 230 stores data such as a basic program, an application program, and setting information for the operation of the base station. The storage unit 230 may be formed of a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. In addition, the storage unit 230 provides stored data according to the request of the control unit 240.

The controller 240 controls overall operations of the base station. For example, the control unit 240 transmits and receives signals through the wireless communication unit 210 or through the backhaul communication unit 220. In addition, the control unit 240 writes and reads data in the storage unit 230. In addition, the control unit 240 may perform functions of a protocol stack required by a communication standard. According to another implementation example, the protocol stack may be included in the wireless communication unit 210. To this end, the control unit 240 may include at least one processor. According to various embodiments, the controller 240 may control the base station to perform operations according to various embodiments to be described later.

3 illustrates a configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure. The configuration illustrated in FIG. 3 may be understood as the configuration of the terminal 120. Terms such as'?? unit' and'?? group' used hereinafter refer to units that process at least one function or operation, which may be implemented as hardware or software, or a combination of hardware and software.

Referring to FIG. 3, the terminal includes a communication unit 310, a storage unit 320, and a control unit 330.

The communication unit 310 performs functions for transmitting and receiving signals through a wireless channel. For example, the communication unit 310 performs a function of converting between a baseband signal and a bit stream according to the physical layer standard of the system. For example, when transmitting data, the communication unit 310 generates complex symbols by encoding and modulating a transmission bit stream. In addition, when receiving data, the communication unit 310 restores the received bit stream through demodulation and decoding of the baseband signal. In addition, the communication unit 310 up-converts the baseband signal into an RF band signal and transmits it through an antenna, and down-converts the RF band signal received through the antenna into a baseband signal. For example, the communication unit 310 may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like.

In addition, the communication unit 310 may include a plurality of transmission/reception paths. Furthermore, the communication unit 310 may include at least one antenna array composed of a plurality of antenna elements. In terms of hardware, the communication unit 310 may be composed of a digital circuit and an analog circuit (eg, a radio frequency integrated circuit (RFIC)). Here, the digital circuit and the analog circuit may be implemented in one package. In addition, the communication unit 310 may include a plurality of RF chains. Furthermore, the communication unit 310 may perform beamforming.

The communication unit 310 transmits and receives signals as described above. Accordingly, all or part of the communication unit 310 may be referred to as a'transmitting unit', a'receiving unit', or a'transmitting/receiving unit'. In addition, in the following description, transmission and reception performed through a wireless channel are used in a sense including the processing as described above is performed by the communication unit 310.

The storage unit 320 stores data such as a basic program, an application program, and setting information for the operation of the terminal. The storage unit 320 may be formed of a volatile memory, a nonvolatile memory, or a combination of a volatile memory and a nonvolatile memory. In addition, the storage unit 320 provides stored data according to the request of the control unit 330.

The controller 330 controls overall operations of the terminal. For example, the control unit 330 transmits and receives signals through the communication unit 310. In addition, the control unit 330 writes and reads data in the storage unit 320. In addition, the control unit 330 may perform functions of a protocol stack required by a communication standard. To this end, the control unit 330 may include at least one processor or a micro processor, or may be a part of a processor. In addition, a part of the communication unit 310 and the control unit 330 may be referred to as a communication processor (CP). According to various embodiments, the controller 330 may control the terminal to perform operations according to various embodiments to be described later.

4 illustrates a configuration of a communication unit in a wireless communication system according to various embodiments of the present disclosure. 4 shows an example of a detailed configuration of the wireless communication unit 210 of FIG. 2 or the communication unit 310 of FIG. 3. Specifically, FIG. 4 is a part of the wireless communication unit 210 of FIG. 2 or the communication unit 310 of FIG. 3, and illustrates components for performing beamforming.

4, the wireless communication unit 210 or the communication unit 310 includes an encoding and modulating unit 402, a digital beamforming unit 404, a plurality of transmission paths 406-1 to 406-N, and an analog beam. It includes a forming part 408.

The encoding and modulating unit 402 performs channel encoding. For channel encoding, at least one of a low density parity check (LDPC) code, a convolution code, and a polar code may be used. The encoding and modulating unit 402 generates modulation symbols by performing constellation mapping.

The digital beamforming unit 404 performs beamforming on a digital signal (eg, modulation symbols). To this end, the digital beamforming unit 404 multiplies the modulation symbols by beamforming weights. Here, the beamforming weights are used to change the size and phase of a signal, and may be referred to as a'precoding matrix', a'precoder', and the like. The digital beamforming unit 404 outputs digitally beamformed modulation symbols through a plurality of transmission paths 406-1 to 406-N. In this case, according to a multiple input multiple output (MIMO) transmission scheme, modulation symbols may be multiplexed or the same modulation symbols may be provided through a plurality of transmission paths 406-1 to 406-N.

The plurality of transmission paths 406-1 to 406-N convert digital beamformed digital signals into analog signals. To this end, each of the plurality of transmission paths 406-1 to 406-N may include an inverse fast fourier transform (IFFT) operation unit, a cyclic prefix (CP) insertion unit, a DAC, and an up-conversion unit. The CP insertion unit is for an orthogonal frequency division multiplexing (OFDM) scheme, and may be excluded when another physical layer scheme (eg, filter bank multi-carrier (FBMC)) is applied. That is, the plurality of transmission paths 406-1 to 406-N provide an independent signal processing process for a plurality of streams generated through digital beamforming. However, depending on the implementation method, some of the components of the plurality of transmission paths 406-1 to 406-N may be used in common.

The analog beamforming unit 408 performs beamforming on an analog signal. To this end, the digital beamforming unit 404 multiplies the analog signals by beamforming weights. Here, the beamforming weights are used to change the magnitude and phase of the signal. Specifically, the analog beamforming unit 440 may be configured in various ways according to a connection structure between the plurality of transmission paths 406-1 to 406-N and antennas. For example, each of the plurality of transmission paths 406-1 to 406-N may be connected to one antenna array. As another example, a plurality of transmission paths 406-1 to 406-N may be connected to one antenna array. As another example, the plurality of transmission paths 406-1 to 406-N may be adaptively connected to one antenna array, or may be connected to two or more antenna arrays.

5 illustrates a structure of a radio time-frequency resource of a wireless communication system according to various embodiments of the present disclosure.

Referring to FIG. 5, in the radio resource domain, the horizontal axis represents the time domain and the vertical axis represents the frequency domain. The minimum transmission unit in the time domain is an OFDM symbol or a DFT-S-OFDM symbol, and N _symb OFDM symbols or DFT-S-OFDM symbols 530 are one Included in the slot 505 of. Unlike the slot, in the NR system, the length of the subframe may be defined as 1.0 ms, and the length of the radio frame 500 may be defined as 10 ms. The minimum transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission bandwidth may include a total of N _BW subcarriers 525. Specific values such as N _symb and N _BW can be variably applied depending on the system.

The basic unit of the time-frequency resource region is a resource element (RE) 510, which may be represented by an OFDM symbol index or a DFT-S-OFDM symbol index and a subcarrier index. A resource block (RB 515) may be defined as N _RB consecutive subcarriers 520 in the frequency domain. In general, the minimum transmission unit of data is an RB unit, and in an NR system generally N _symb = 14, N _RB = 12.

The structure of the radio time-frequency resource as shown in FIG. 5 is applied to the Uu interface. In addition, the radio time-frequency resource as shown in FIG. 5 can be similarly applied to the sidelink.

6A to 6D illustrate examples of scenarios for sidelink communication in a wireless communication system according to various embodiments of the present disclosure.

6A illustrates an in-coverage scenario in which sidelink terminals 620a and 520b are located within the coverage of the base station 610. The sidelink terminals 620a and 520b may receive data and control information from the base station 610 through downlink (DL) or transmit data and control information to the base station through uplink (UL). I can. In this case, the data and control information may be data and control information for sidelink communication, or data and control information for general cellular communication other than sidelink communication. In addition, in FIG. 6A, sidelink terminals 620a and 520b may transmit and receive data and control information for sidelink communication through a sidelink.

6B illustrates a case of partial coverage in which the first terminal 620a is located within the coverage of the base station 610 and the second terminal 620b is located outside the coverage of the base station 610 among sidelink terminals. . The first terminal 620a located within the coverage of the base station 610 may receive data and control information from the base station through downlink or transmit data and control information to the base station through uplink. The second terminal 620b located outside the coverage of the base station 610 cannot receive data and control information from the base station through downlink, and cannot transmit data and control information to the base station through uplink. The second terminal 620b may transmit and receive data and control information for sidelink communication with the first terminal 610a through a sidelink.

6C is an example of a case in which sidelink terminals (eg, a first terminal 610a and a second terminal 620b) are located outside the coverage of the base station 610. Accordingly, the first terminal 620a and the second terminal 620b cannot receive data and control information from the base station through the downlink, and cannot transmit data and control information to the base station through the uplink. The first terminal 620a and the second terminal 620b may transmit and receive data and control information for sidelink communication through a sidelink.

6D shows that the first terminal 620a and the second terminal 620b performing sidelink communication are connected to different base stations (eg, the first base station 610a, the second base station 610b) or (example : RRC connection state) or when camping (eg, RRC connection release state, that is, RRC idle state), inter-cell sidelink communication is performed. In this case, the first terminal 620a may be a sidelink transmitting terminal and the second terminal 620b may be a sidelink receiving terminal. Alternatively, the first terminal 620a may be a sidelink receiving terminal and the second terminal 620b may be a sidelink transmitting terminal. The first terminal 620a may receive a sidelink-only system information block (SIB) from the base station 610a to which it is connected (or camping), and the second terminal 620b is It is possible to receive a sidelink-only SIB from another base station 620b (or that it is camping). In this case, the information of the sidelink-only SIB received by the first terminal 620a and the information of the sidelink-only SIB received by the second terminal 620b may be different from each other. Therefore, it is necessary to unify information in order to perform sidelink communication between terminals located in different cells.

In the examples of FIGS. 6A to 6D, for convenience of explanation, a sidelink system consisting of two terminals (eg, a first terminal 610a and a second terminal 620b) has been described as an example. It is not limited and may be applied to a sidelink system in which three or more terminals participate. In addition, the uplink and downlink between the base station 610 and the sidelink terminals may be referred to as a Uu interface, and the sidelink between the sidelink terminals may be referred to as a PC-5 interface. In the following description, uplink or downlink and Uu interface, sidelink, and PC-5 may be mixed.

Meanwhile, in the present disclosure, the terminal is a vehicle supporting vehicle-to-vehicular communication (vehicular-to-vehicular, V2V), a vehicle supporting vehicle-to-pedestrian communication (vehicular-to-pedestrian, V2P), or a handset of a pedestrian (eg: Smartphone), a vehicle that supports communication between a vehicle and a network (vehicular-to-network, V2N), or a vehicle that supports communication between a vehicle and an infrastructure (vehicular-to-infrastructure, V2I). . In addition, in the present disclosure, the terminal may mean a road side unit (RSU) equipped with a terminal function, an RSU equipped with a base station function, or an RSU equipped with a part of the base station function and a part of the terminal function.

7A and 7B illustrate examples of a method of transmitting sidelink communication in a wireless communication system according to various embodiments of the present disclosure. 7A illustrates a unicast method, and FIG. 7B illustrates a groupcast method.

As shown in FIG. 7A, the transmitting terminal 720a and the receiving terminal 720b may perform one-to-one communication as in FIG. The transmission scheme shown in FIG. 7A may be referred to as unicast communication. As shown in FIG. 7B, the transmitting terminal 720a or 620d and the receiving terminals 720b, 620c, 620e, 620f, and 620g may perform one-to-many communication. The transmission scheme shown in FIG. 7B may be referred to as groupcast or multicast. In FIG. 7B, a first terminal 720a, a second terminal 720b, and a third terminal 720c form a group, perform groupcast communication, and the fourth terminal 720d, 5 The terminal 720e, the sixth terminal 720f, and the seventh terminal 720g form different groups and perform groupcast communication. Terminals may perform groupcast communication within a group to which they belong, and may perform unicast, groupcast, or broadcast communication with at least one other terminal belonging to different groups. In FIG. 7B, two groups are exemplified, but the present invention is not limited thereto, and may be applied even when a larger number of groups are formed.

Meanwhile, although not shown in FIGS. 7A or 7B, sidelink terminals may perform broadcast communication. Broadcast communication refers to a method in which all sidelink terminals receive data and control information transmitted by a sidelink transmitting terminal through a sidelink. For example, if the first terminal 720a in FIG. 7B is a transmitting terminal, the remaining terminals 520b, 620c, 620d, 620e, 620f, and 620g receive data and control information transmitted by the first terminal 720a. can do.

The aforementioned sidelink unicast communication, groupcast communication, and broadcast communication are supported in an in-coverage scenario, a partial-coverage scenario, or an out-of-coverage scenario. Can be.

In the case of the NR sidelink, unlike in the LTE sidelink, a transmission type in which a vehicle terminal transmits data to only one specific terminal through unicast and a transmission type in which data is transmitted to a plurality of specific terminals through groupcast are supported. Can be considered. For example, when considering a service scenario such as platooning, which is a technology that connects two or more vehicles to one network and moves in a cluster form, such unicast and groupcast technologies can be usefully used. Specifically, unicast communication may be used for the purpose of a group leader terminal connected by platooning to control one specific terminal, and groupcast communication for the purpose of simultaneously controlling a group consisting of a plurality of specific terminals. Can be used.

Resource allocation in the V2X system can be used in the following ways.

(1) Mode 1 resource allocation

Scheduled resource allocation is a method in which a base station allocates resources used for sidelink transmission to RRC-connected terminals in a dedicated scheduling scheme. The scheduled resource allocation method can be effective for interference management and resource pool management (dynamic allocation and/or semi-persistent transmission) because the base station can manage the resources of the sidelink. When there is data to be transmitted to other terminal(s), the RRC connected mode terminal informs the base station that there is data to be transmitted to other terminal(s) by using an RRC message or a MAC control element (``CE'') Can be transmitted. For example, the RRC message transmitted from the terminal to the base station may be a sidelink terminal information (SidelinkUEInformation), terminal assistance information (UEAssistanceInformation) message, and the MAC CE is a buffer status report (BSR) for V2X communication. A BSR MAC CE, SR (scheduling request), etc. including at least one of information on the size of data buffered for sidelink communication and an indicator indicating that it is the same may correspond.

(2) Mode 2 resource allocation

Second, UE autonomous resource selection provides the sidelink transmission/reception resource pool for V2X to the terminal as system information or RRC message (for example, RRC Reconfiguration message, PC5-RRC message), and the terminal It is a method of selecting a resource pool and a resource according to this set rule. The terminal autonomous resource selection may correspond to one of the following resource allocation methods or a plurality of methods.

> The terminal autonomously selects sidelink resources for transmission (UE autonomously selects sidelink resource for transmission).

> The UE assists in selecting sidelink resources for other UEs (UE assists sidelink resource selection for other UEs).

> The terminal receives the configured grant of the NR for sidelink transmission (UE is configured with NR configured grant for sidelink transmission).

> The UE can schedule sidelink transmission of other UEs (UE schedules sidelink transmission of other UEs).

-The terminal resource selection method may include zone mapping, sensing-based resource selection, and random selection.

-In addition, even if it exists in the coverage of the base station, resource allocation or resource selection may not be performed in a scheduled resource allocation or terminal autonomous resource selection mode, in which case the terminal is a preconfigured sidelink transmission/reception resource pool (preconfiguration resource pool). V2X sidelink communication can also be performed through.

-In addition, when the terminals for V2X communication exist outside the coverage of the base station, the terminal may perform V2X sidelink communication through a preset sidelink transmission/reception resource pool.

SLRB configuration and SLRB for transmitting sidelink flows or packets are mapped to an SL logical channel group (LCG), and the SL LCG may be mapped to an SL logical channel. SLRB configuration and SLRB include source index, destination index, cast type, QFI (QoS flow identifier)/PFI (ProSe flow identifier or PC5 flow identifier) or priority, etc. It can be classified as a combination of.

8A to 8G illustrate data combinations transmitted through an uplink or a sidelink in a wireless communication system according to various embodiments of the present disclosure.

8A to 8G, the UE is SRB (eg, RRC), DRB, MAC CE, PUCCH (physical uplink control channel), PC5-RRC, PC5-S, SL-DRB through uplink or sidelink. , At least one of a sidelink feedback channel (SL-FCH) and an SL MAC CE may be transmitted. Data that the UE can transmit through the sidelink may be a combination of at least one of PC5-RRC, PC5-S, SL-DRB, SL-FCH, and SL MAC CE, as shown in FIGS. 8A to 8D. Here, the combination is possible when the one or more sidelink data can be multiplexed to the SL MAC PDU, and the SL-FCH is not combined with other data. The data that the UE can transmit through the uplink may be a combination of at least one of SRB (ie, RRC), DRB, MAC CE, and PUCCH, as shown in FIGS. 8E to 8G. Here, the combination is possible when the one or more uplink data can be multiplexed to the UL MAC PDU, and the PUCCH is not combined with other data.

Uplink resources and sidelink resources may be allocated to different frequencies in the same time resource. For example, uplink resources and sidelink resources located on the same time axis may be allocated in different bandwidth parts (BWP). In this case, it may be difficult for the UE to use both uplink resources and sidelink resources due to a limitation of hardware capability or a limitation of available transmission power. For example, the limitation of hardware capability may include the number of beams that can be simultaneously formed, the size of a supported bandwidth, the number of antennas, and sharing/separating power devices. Accordingly, the present disclosure relates to a method and apparatus for determining a transmission priority between uplink and sidelink when it is determined that it is difficult for a terminal to simultaneously transmit an uplink transmission packet and a sidelink transmission packet. In addition, the present disclosure relates to a method and apparatus for determining the priority of packet transmission between an uplink and a sidelink in a vehicle to everything (V2X) system of a next-generation wireless communication system.

Hereinafter, the present disclosure describes embodiments for determining a transmission priority between uplink data and sidelink data illustrated in FIGS. 8A to 8G.

As an example, the terminal may be configured to determine a transmission priority between uplink data including MAC CE and sidelink data. In this case, since the UE needs to determine the priority value of the MAC CE, the system may define a setting criterion for the priority value of the MAC CE. For example, the criterion for setting the priority value of MAC CE is that the MAC CE transmits general uplink data (e.g., user packet) and general sidelink data (e.g., user packet). In order to do so, it may be related to radio resource control that must be processed urgently. That is, the MAC CE determined to be related to radio resource control that must be processed first in order to transmit general uplink data and general sidelink data is set to a higher priority value than general uplink data and general sidelink data. Can be. MAC CE, which is determined to be inferior to radio resource control that must be processed first in order to transmit general uplink data and general sidelink data, may have a priority value lower than that of general uplink data and general sidelink data. . In this way, the method of setting the priority value for the MAC CE and comparing the priority value between the MAC CE and general uplink data or general sidelink data can consider all data that can be transmitted from the terminal, and thus a more sophisticated level. It has the advantage of being able to support priority transmission.

As another example, the UE may determine a transmission priority between uplink data and sidelink data, excluding MAC CE. In this case, since the system does not need to define a criterion for setting a priority value for the MAC CE, the method of excluding the MAC CE has the advantage that it is not complicated.

9A is a flowchart 910 of a terminal transmitting data according to priorities in a wireless communication system according to various embodiments of the present disclosure. 9A illustrates a method of operating the terminal 120.

Referring to FIG. 9A, in step 901, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, after receiving information on the allocation of uplink resources and sidelink resources, and checking the uplink resources and sidelink resources based on the information, the terminal is used for uplink data and sidelink When it is determined that data cannot be transmitted simultaneously, or when it is determined that uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link, it may be necessary to determine the transmission priority between uplink data and sidelink data. have.

In step 903, the terminal determines the priority based on the defined rule. The defined rules may differ according to specific embodiments. Various embodiments of the rule will be described below with reference to FIGS. 10A to 10D.

In step 905, the UE transmits uplink data or sidelink data according to the determined priority. In other words, the terminal may transmit the data determined to have a high priority after encoding and modulation. In this case, data determined to have a low priority may be dropped or transmitted with low power. Here, the low power means power that is lower than the power applied when data determined to have a low priority is determined to have a high priority. For example, the low power may be less than or equal to the remaining power except for the power used to transmit data determined to have a high priority in the maximum transmission power of the terminal.

9B is another flowchart 920 of a terminal determining priority between uplink data and sidelink data according to various embodiments of the present disclosure. 9B illustrates an operation method of the terminal 120.

Referring to FIG. 9B, in step 911, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, after receiving information on the allocation of uplink resources and sidelink resources, and checking the uplink resources and sidelink resources based on the information, the terminal is used for uplink data and sidelink When it is determined that data cannot be transmitted simultaneously, or when it is determined that uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link, it may be necessary to determine the transmission priority between uplink data and sidelink data. have.

In step 913, the UE may determine whether uplink data should be transmitted through PUCCH. In other words, the terminal may check whether data to be transmitted through the PUCCH is pending. If uplink data is to be transmitted through PUCCH, in step 915, the UE may determine that the transmission priority of uplink data is high. On the other hand, if uplink data does not need to be transmitted through the PUCCH, in step 917, the UE determines the priority based on the defined rule. The defined rules may differ according to specific embodiments. Various embodiments of the rule will be described below with reference to FIGS. 10A to 10D.

In step 919, the UE transmits uplink data or downlink data according to the determined priority. In other words, the terminal may transmit the data determined to have the highest priority after encoding and modulation. In this case, data determined to have a low priority may be dropped or transmitted with low power. Here, the low power means power that is lower than the power applied when data determined to have a low priority is determined to have a high priority. For example, the low power may be less than or equal to the remaining power except for the power used to transmit data determined to have a high priority in the maximum transmission power of the terminal.

The operations illustrated in FIG. 9B are an embodiment when a transmission priority of a PUCCH among uplink data is defined higher than that of sidelink data. According to another embodiment, when the transmission priority of the PUCCH is not always defined higher than the sidelink data, if the uplink data includes the PUCCH, the terminal performs the PUCCH and the sidelink according to the procedures of FIGS. 9A and 10A to 10D. You can determine the priority of data. In this case, the PUCCH may be the object of determination instead of the MAC CE.

According to an embodiment, when the transmission priority of the SRB among the uplink data is defined higher than the sidelink data, if the uplink data includes the SRB, the UE prioritizes the SRB and the sidelink data according to the procedure of FIG. 9B. Can judge. In this case, in FIG. 9B, an SRB may be determined instead of a PUCCH.

According to another embodiment, when the transmission priority of the SRB is not always defined higher than the sidelink data, if the uplink data includes the SRB, the UE is configured with the SRB according to the operations shown in FIGS. 9A and 10A to 10D. The priority of sidelink data can be determined. In this case, instead of the MAC CE, the SRB may be a determination object.

Hereinafter, the present disclosure describes detailed operations of determining the priority with reference to FIGS. 10A to 10E.

10A is a flowchart 1010 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 10A illustrates a method of operating the terminal 120.

Referring to FIG. 10A, in step 1001, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In step 1003, the UE checks whether the uplink data includes data other than MAC CE. If the uplink data does not include data other than the MAC CE, in step 1005, the UE may determine that the sidelink data has a higher priority than the uplink data.

On the other hand, if the uplink data includes data other than the MAC CE, in step 1007, the UE determines the priority based on the priority value. In other words, the UE may determine a transmission priority between uplink data and sidelink data other than MAC CE. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

10B is a flowchart 1030 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 10B illustrates an operation method of the terminal 120.

Referring to FIG. 10B, in step 1021, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In step 1023, the UE checks whether the uplink data includes data other than MAC CE. If the uplink data does not include data other than the MAC CE, in step 1025, the UE may determine that the uplink data has a higher priority than the sidelink data. That is, the UE may determine that the MAC CE transmitted through the uplink has a higher priority than the sidelink data.

On the other hand, if the uplink data includes data other than the MAC CE, in step 1027, the UE determines the priority based on the priority value. In other words, the UE may determine a transmission priority between uplink data and sidelink data other than MAC CE. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

10C is a flowchart 1050 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 10C illustrates an operation method of the terminal 120.

Referring to FIG. 10C, in step 1041, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In step 1043, the UE checks whether the uplink data includes data other than MAC CE.

If the uplink data does not include data other than the MAC CE, in step 1045, the UE identifies a MAC CE group including at least one MAC CE. A plurality of MAC CE groups are defined, and the MAC CE group may be classified into a group having a higher transmission priority than sidelink data and a group having a lower transmission priority than sidelink data. For example, MAC CE group A may include MAC CEs having a higher transmission priority than sidelink data. Accordingly, it may be determined that the MAC CE that does not belong to the MAC CE group A has a lower transmission priority than the sidelink data. MAC CE information belonging to the MAC CE group A may be set in the system to the UE or may be previously stored in the UE. Even if the terminal has previously stored information on MAC CE group A, if the system sets information on new MAC CE group A, the terminal can use the information set by the system.

If at least one MAC CE is included in the MAC CE group A, in step 1047, the UE may determine that uplink data has a higher transmission priority than sidelink data. On the other hand, if at least one MAC CE is not included in the MAC CE group A, in step 1049, the UE may determine that the sidelink data has a higher transmission priority than the uplink data.

If the uplink data includes data other than the MAC CE, in step 1051, the UE determines the priority based on the priority value. In other words, the UE may determine a transmission priority between uplink data and sidelink data other than MAC CE. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

10D is a flowchart 1070 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 10D illustrates an operation method of the terminal 120.

Referring to FIG. 10D, in step 1061, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In step 1063, the UE checks whether the uplink data includes data other than MAC CE.

If the uplink data does not include data other than the MAC CE, in step 1065, the UE compares the priority value and the threshold of the sidelink data. In other words, the terminal may determine whether the priority value of the sidelink data is greater than a preset threshold. For example, when a plurality of sidelink data is combined, the terminal may compare the priority value of the sidelink data having the highest priority among the plurality of sidelink data with a threshold. In this embodiment, when the priority value is greater than the threshold value, it means that the transmission priority is high. However, according to another embodiment, if the priority value is less than the threshold value, it may mean that the transmission priority is high. In this case, step 1065 may be replaced with an operation of determining whether the priority value of the sidelink data is less than a preset threshold.

If the priority value of the sidelink data is greater than the threshold value, in step 1067, the terminal may determine that the sidelink data has a higher transmission priority than the uplink data. On the other hand, if the priority value of the sidelink data is not greater than the threshold, in step 1069, the UE may determine that the uplink data has a higher transmission priority than the sidelink data.

If the uplink data includes data other than the MAC CE, in step 1071, the UE determines the priority based on the priority value. In other words, the UE may determine a transmission priority between uplink data and sidelink data other than MAC CE. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

10E is a flowchart 1070 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 10E illustrates a method of operating the terminal 120.

Referring to FIG. 10E, in step 1081, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data.

In step 1083, the terminal compares the priority value and the threshold value of the sidelink data. In other words, the terminal may determine whether the priority value of the sidelink data is greater than a preset threshold. For example, when a plurality of sidelink data is combined, the terminal may compare the priority value of the sidelink data having the highest priority among the plurality of sidelink data with a threshold. In this embodiment, when the priority value is greater than the threshold value, it means that the transmission priority is high. However, according to another embodiment, if the priority value is less than the threshold value, it may mean that the transmission priority is high. In this case, step 1083 may be replaced with an operation of determining whether the priority value of the sidelink data is smaller than a preset threshold.

If the priority value of the sidelink data is greater than the threshold value, in step 1085, the terminal may determine that the sidelink data has a higher transmission priority than the uplink data. On the other hand, if the priority value of the sidelink data is not greater than the threshold, in step 1087, the UE may determine that the uplink data has a higher transmission priority than the sidelink data.

Hereinafter, the present disclosure describes embodiments in which a priority value used to compare priorities between uplink data and sidelink data in the above-described embodiments is used. Embodiments described below may be understood as examples of some of the above-described operations.

According to an embodiment, as priority values set for uplink data, 16-step priority values set by a base station for an uplink logical channel may be used. The base station may define priority values set for sidelink data in 16 steps in the same way as uplink, and apply them to a sidelink logical channel. That is, the system can use the same priority value to compare the priority with the sidelink logical channel based on the priority value set in the uplink logical channel.

According to an embodiment, since the priority value of the existing LTE-based sidelink logical channel is set to 8 levels, the priority values of the 8 levels are used to determine the priority between the LTE-based sidelink and the NR-based sidelink. Can be applied to The base station may set the 8-step priority values to the uplink logical channel, the same as the priority values set in the sidelink data. The 8-step priority values may be set separately from the existing 16-step priority values.

According to an embodiment, the base station may set 16-step priority values for an uplink logical channel and 8-step priority values for a sidelink logical channel. In order to compare the priorities between uplink and sidelinks having different stage structures, the terminal corresponds to the priority values of the 16 levels to the priority values of the 8 levels or the priority values of the 8 levels to the priority values of the 16 levels. Rule information can be obtained. Correspondence rules between priority values may be defined as follows.

(1) One priority value may correspond to two priority values. Assuming that the 16-step priority values of the uplink are 1 to 16 and the 8-step priority values of the sidelink are 1 to 8, the uplink priority values 1 and 2 correspond to the sidelink priority value 1, and the uplink The priority values 3 and 4 may correspond to the sidelink priority value 2. Here, if the uplink priority value is 1 and the sidelink priority value is 2, the UE may determine that the uplink priority is high.

(2) Since the base station can set the priority value of the logical channel based on the required QoS profile, that is, the requirements, the level of the QoS profile required for each of the sidelink logical channel and the uplink logical channel (e.g. : Urgency, low latency, high reliability, high speed, etc.), the priority values between links may correspond. For example, the level of the QoS profile is similar in the uplink priority values 1, 2, and 3 and the sidelink priority value 1, and the uplink priority values 4, 5, 6, 7 and the sidelink priority value 2, It can be judged to be similar in 3. Accordingly, the terminal corresponds to the sidelink priority value 1 for the uplink priority values 1, 2, and 3, and the sidelink priority values 2, 3 for the uplink priority values 4, 5, 6, and 7 It can be determined that it corresponds. Here, if the uplink priority value is 4 and the sidelink priority value is 1, the terminal may determine that the sidelink priority is high.

The operation of the priority value may also be applied to the case of setting the priority value to the MAC CE according to various embodiments of the present invention.

11A is a flowchart 1110 of a terminal determining a priority between uplink data and sidelink data in a wireless communication system according to another embodiment of the present disclosure. 11A illustrates a method of operating the terminal 120.

Referring to FIG. 11A, in step 1101, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1103, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In other words, the terminal may determine uplink data and sidelink data that are the targets of the transmission priority determination.

In step 1105, the UE may determine whether the uplink data includes MAC CE. If the uplink data includes the MAC CE, in step 1107, the UE may determine that the sidelink data has a higher transmission priority than the uplink data.

On the other hand, if the uplink data does not include the MAC CE, in step 1109, the UE determines a priority value based on the priority value. The UE may compare a priority value of uplink data and a priority value of sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

11B is a flowchart 1130 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 11B illustrates a method of operating the terminal 120.

Referring to FIG. 11B, in step 1121, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1123, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In other words, the terminal may determine uplink data and sidelink data that are the targets of the transmission priority determination.

In step 1125, the UE may determine whether the uplink data includes MAC CE. If the uplink data includes the MAC CE, in step 1127, the UE may determine that the uplink data has a higher transmission priority than the sidelink data.

On the other hand, if the uplink data does not include the MAC CE, in step 1129, the UE determines a priority value based on the priority value. The UE may compare a priority value of uplink data and a priority value of sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

11C is a flowchart 1150 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 11C illustrates an operation method of the terminal 120.

Referring to FIG. 11C, in step 1141, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1143, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In other words, the terminal may determine uplink data and sidelink data that are the targets of the transmission priority determination. In step 1145, the UE may determine whether the uplink data includes MAC CE.

If the uplink data includes the MAC CE, in step 1147, the UE identifies a MAC CE group including at least one MAC CE. A plurality of MAC CE groups are defined, and the MAC CE group may be classified into a group having a higher transmission priority than sidelink data and a group having a lower transmission priority than sidelink data. For example, MAC CE group A may include MAC CEs having a higher transmission priority than sidelink data. Accordingly, it may be determined that the MAC CE that does not belong to the MAC CE group A has a lower transmission priority than the sidelink data. MAC CE information belonging to the MAC CE group A may be set in the system to the UE or may be previously stored in the UE. Even if the terminal has previously stored information on MAC CE group A, if the system sets information on new MAC CE group A, the terminal can use the information set by the system.

If at least one MAC CE is included in the MAC CE group A, in step 1149, the UE may determine that uplink data has a higher transmission priority than sidelink data. On the other hand, if at least one MAC CE is not included in the MAC CE group A, in step 1151, the UE may determine that the sidelink data has a higher transmission priority than the uplink data.

If the uplink data includes data other than the MAC CE, in step 1151, the UE determines the priority based on the priority value. In other words, the UE may determine a transmission priority between uplink data and sidelink data other than MAC CE. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

11D is a flowchart 1170 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 11D illustrates an operation method of the terminal 120.

Referring to FIG. 11D, in step 1161, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1163, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In other words, the terminal may determine uplink data and sidelink data that are the targets of the transmission priority determination. In step 1165, the UE may determine whether the uplink data includes MAC CE.

If the uplink data includes the MAC CE, in step 1167, the UE compares the priority value and the threshold of the sidelink data. In other words, the terminal may determine whether the priority value of the sidelink data is greater than a preset threshold. For example, when a plurality of sidelink data is combined, the terminal may compare the priority value of the sidelink data having the highest priority among the plurality of sidelink data with a threshold. In this embodiment, when the priority value is greater than the threshold value, it means that the transmission priority is high. However, according to another embodiment, if the priority value is less than the threshold value, it may mean that the transmission priority is high. In this case, step 1165 may be replaced with an operation of determining whether the priority value of the sidelink data is smaller than a preset threshold.

If the priority value of the sidelink data is greater than the threshold value, in step 1169, the terminal may determine that the sidelink data has a higher transmission priority than the uplink data. On the other hand, if the priority value of the sidelink data is not greater than the threshold value, in step 1171, the UE may determine that the uplink data has a higher transmission priority than the sidelink data.

If the uplink data includes data other than the MAC CE, in step 1173, the UE determines the priority based on the priority value. In other words, the UE may determine a transmission priority between uplink data and sidelink data other than MAC CE. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

According to another embodiment, when the UE needs to determine a transmission priority between uplink data and sidelink data, the UE may consider whether the uplink data should be transmitted through PUCCH. When uplink data is transmitted through PUCCH, the UE may determine that the transmission priority of uplink data is higher than that of sidelink data. If it is determined that uplink data does not need to be transmitted through the PUCCH, the UE may determine the transmission priority of uplink data and sidelink data according to at least one procedure of FIGS. 11A to 11D.

According to another embodiment, when the transmission priority of the uplink data transmitted through the PUCCH is not set higher than the sidelink data, if it is determined that the uplink data includes the PUCCH, the terminal is one of FIGS. 11A to 11D. The procedure of may be performed to determine the priority of PUCCH and sidelink data. In this case, in one of the procedures of FIGS. 11A to 11D, PUCCH may be determined instead of MAC CE.

When the transmission priority of the SRB among the uplink data is defined higher than the sidelink data, if the uplink data includes the SRB, the UE may determine that the transmission priority of the uplink data is higher than the sidelink data. If the transmission priority of the SRB among the uplink data is not defined higher than that of the sidelink data, if the uplink data includes the SRB, the UE performs one procedure of FIGS. 11A to 11D as the priority of the SRB and the sidelink data. Can be done to judge. In this case, in one of the procedures of FIGS. 11A to 11D, the SRB may be determined instead of the MAC CE.

Various embodiments in which a UE uses a priority value to determine a transmission priority between uplink data and sidelink data excluding MAC CE have been described with reference to FIGS. 9A to 11D. Next, the present disclosure is a variety of using a priority value or a priority setting value corresponding thereto in order for the UE to determine the transmission priority between uplink data including MAC CE and sidelink data with reference to FIGS. 12A to 13B. Examples will be described.

FIG. 12A is a flowchart 1210 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 12A illustrates a method of operating the terminal 120.

Referring to FIG. 12A, in step 1201, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1203, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In other words, the terminal may determine uplink data and sidelink data that are the targets of the transmission priority determination. In step 1205, the UE checks whether the uplink data includes data other than MAC CE.

If the uplink data does not include data other than the MAC CE, the transmission priority between the MAC CE and the sidelink data may be determined based on the priority value in step 1207. To this end, the UE may compare the priority value of the MAC CE and the priority value of the sidelink data. When comparing the priority values of one or more MAC CEs with the priority values of one or more sidelink data, the UE selects the uplink data determined to have the highest priority according to the priority value among MAC CEs, and After selecting the sidelink data determined to have the highest priority according to the priority value among the link data, the priority value of the selected MAC CE and the priority value of the sidelink data may be compared. The priority value for the MAC CE may be set to the UE in the system or may be already stored in the UE. Even if the UE has previously stored the priority value for the MAC CE, if the system sets information on the priority value for the new MAC CE, the UE can use the information set by the system.

On the other hand, if the uplink data includes data other than the MAC CE, in step 1209, the UE may determine a transmission priority between uplink data including MAC CE and sidelink data based on priority values. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

12B is a flowchart 1230 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 12B illustrates an operation method of the terminal 120.

Referring to FIG. 12B, in step 1221, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1223, the UE may determine whether uplink data should be transmitted through PUCCH. In other words, the terminal may check whether data to be transmitted through the PUCCH is pending. If the uplink data is to be transmitted through the PUCCH, in step 1225, the UE may determine that the transmission priority of the uplink data is high. On the other hand, if the uplink data does not need to be transmitted through the PUCCH, in step 1227, the terminal may check the uplink data and the sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In other words, the terminal may determine uplink data and sidelink data that are the targets of the transmission priority determination. In step 1229, the UE checks whether the uplink data includes data other than MAC CE.

If the uplink data does not include other data other than the MAC CE, the transmission priority between the MAC CE and the sidelink data may be determined based on the priority value in step 1231. To this end, the UE may compare the priority value of the MAC CE and the priority value of the sidelink data. When comparing the priority values of one or more MAC CEs with the priority values of one or more sidelink data, the UE selects the uplink data determined to have the highest priority according to the priority value among MAC CEs, and After selecting the sidelink data determined to have the highest priority according to the priority value among the link data, the priority value of the selected MAC CE and the priority value of the sidelink data may be compared. The priority value for the MAC CE may be set to the UE in the system or may be already stored in the UE. Even if the UE has previously stored the priority value for the MAC CE, if the system sets information on the priority value for the new MAC CE, the UE can use the information set by the system.

On the other hand, if the uplink data includes data other than the MAC CE, in step 1233, the UE may determine a transmission priority between uplink data including the MAC CE and sidelink data based on the priority values. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

The procedure illustrated in FIG. 12B is an embodiment in which the transmission priority of PUCCH among uplink data is defined higher than that of sidelink data. According to another embodiment, when the transmission priority of the PUCCH is not defined higher than the sidelink data, if the uplink data includes the PUCCH, the terminal uses the procedure of FIG. 12A to determine the priority of the PUCCH and the sidelink data. Can be done. At this time, in the procedure of FIG. 12A, the PUCCH instead of the MAC CE may be a determination target, and the priority value is set for uplink data transmitted through the PUCCH as in the embodiment of operating the priority value for the MAC CE. I can.

According to an embodiment, when the transmission priority of the SRB among uplink data is defined higher than the sidelink data, if the uplink data includes the SRB, the UE sets the priority of the SRB and the sidelink data according to the scheme of FIG. 12B. Can be done to judge. In this case, in the procedure of FIG. 12B, the SRB may be determined instead of the PUCCH.

According to another embodiment, when the transmission priority of the SRB is not defined higher than the sidelink data, if the uplink data includes the SRB, the UE uses the scheme of FIG. 12A to determine the priority of the SRB and the sidelink data. Can be done. In this case, in the procedure of FIG. 12A, the SRB may be determined instead of the MAC CE.

13A is a flowchart 1310 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 13A illustrates a method of operating the terminal 120.

Referring to FIG. 13A, in step 1301, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1303, the UE may check uplink data and sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In other words, the terminal may determine uplink data and sidelink data that are the targets of the transmission priority determination. In step 1305, the UE checks whether the uplink data includes data other than MAC CE.

If the uplink data does not include other data other than the MAC CE, the transmission priority between the MAC CE and the sidelink data may be determined based on the priority value in step 1307. To this end, the UE may compare the priority value of the MAC CE and the priority value of the sidelink data. When comparing the priority values of one or more MAC CEs with the priority values of one or more sidelink data, the UE selects the uplink data determined to have the highest priority according to the priority value among MAC CEs, and After selecting the sidelink data determined to have the highest priority according to the priority value among the link data, the priority value of the selected MAC CE and the priority value of the sidelink data may be compared. The priority value for the MAC CE may be set to the UE in the system or may be already stored in the UE. Even if the UE has previously stored the priority value for the MAC CE, if the system sets information on the priority value for the new MAC CE, the UE can use the information set by the system.

On the other hand, if the uplink data includes data other than the MAC CE, in step 1309, the UE may determine a transmission priority between uplink data including the MAC CE and sidelink data based on the priority values. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

Examples of priority setting information used by the UE to determine the transmission priority between uplink data and sidelink data in step 1307 or 1309 are described in [Table 1], [Table 2], [Table 3] or [ Table 4]. In [Table 1], [Table 2], [Table 3], and [Table 4], transmission priority is lowered according to the alphabetical order. For example, (a) means the highest priority, and (h) means the lowest priority.

(a) C-RNTI MAC CE or data from UL-CCCH; PC5-RRC; (a-1) PC5-S can be included
(b) Configured Grant Confirmation MAC CE;
(c) MAC CE for BSR, with exception of BSR included for padding;
(d) Single Entry PHR MAC CE or Multiple Entry PHR MAC CE;
(e) MAC control element for Sidelink BSR, with exception of Sidelink BSR included for padding; data from any UL Logical Channel, except data from UL-CCCH; data from any SL Logical Channel, except PC5-RRC; (e-1) data from any Logical Channel, except PC5-RRC and PC5-S
(f) MAC CE for Recommended bit rate query;
(g) MAC CE for BSR included for padding.
(h) MAC control element for Sidelink BSR included for padding.

In [Table 1], (a-1) refers to the case of setting PC5-S to the same priority as "C-RNTI MAC CE or data from UL-CCCH; PC5-RRC" set as the priority of (a). In this case, the UE may determine the transmission priority with reference to (e-1).

Each of the uplink data and sidelink data set to the priority of (e), that is, "data from any UL Logical Channel, except data from UL-CCCH; data from any SL Logical Channel, except PC5-RRC" or (e Each uplink data and sidelink data set with the priority of -1), that is, "data from any UL Logical Channel, except data from UL-CCCH; data from any SL Logical Channel, except PC5-RRC and PC5-S" The priority value may be set for. The priority value may be set as in the above priority value operation embodiment.

(a) C-RNTI MAC CE or data from UL-CCCH;
(b) Configured Grant Confirmation MAC CE;
(c) MAC CE for BSR, with exception of BSR included for padding;
(d) Single Entry PHR MAC CE or Multiple Entry PHR MAC CE;
(e) MAC control element for Sidelink BSR, with exception of Sidelink BSR included for padding;
data from any UL Logical Channel, except data from UL-CCCH; data from SL logical channel including PC5-RRC;
(f) MAC CE for Recommended bit rate query;
(g) MAC CE for BSR included for padding.
(h) MAC control element for Sidelink BSR included for padding.

In [Table 2], each of the uplink data and sidelink data set as the priority of (e), that is, "data from any UL Logical Channel, except data from UL-CCCH; data from SL logical channel including PC5-RRC" For this, a priority value may be set. The priority value may be set as in the above priority value operation embodiment.

(a) C-RNTI MAC CE or data from UL-CCCH; PC5-RRC; (a-1) PC5-S can be included
(b) Configured Grant Confirmation MAC CE;
(c) MAC CE for BSR, with exception of BSR included for padding;
(d) Single Entry PHR MAC CE or Multiple Entry PHR MAC CE;
(e) MAC control element for Sidelink BSR, with exception of Sidelink BSR included for padding;
(f) data from any UL Logical Channel, except data from UL-CCCH; data from any SL Logical Channel, except PC5-RRC; (f-1) data from any Logical Channel, except PC5-RRC and PC5-S
(g) MAC CE for Recommended bit rate query;
(h) MAC CE for BSR included for padding.
(i) MAC control element for Sidelink BSR included for padding.

(A-1) of [Table 3] refers to the case of setting PC5-S with the same priority as "C-RNTI MAC CE or data from UL-CCCH; PC5-RRC" set as the priority in (a). In this case, the terminal may determine the transmission priority with reference to (fa).

Each uplink data and sidelink data set to the priority of (f), that is, "data from any UL Logical Channel, except data from UL-CCCH; data from any SL Logical Channel, except PC5-RRC" or (f- 1) to each of the uplink data and sidelink data, that is, "data from any UL Logical Channel, except data from UL-CCCH; data from any SL Logical Channel, except PC5-RRC and PC5-S" For this, a priority value may be set. The priority value may be set as in the above priority value operation embodiment.

(a) C-RNTI MAC CE or data from UL-CCCH;
(b) Configured Grant Confirmation MAC CE;
(c) MAC CE for BSR, with exception of BSR included for padding;
(d) Single Entry PHR MAC CE or Multiple Entry PHR MAC CE;
(e) MAC control element for Sidelink BSR, with exception of Sidelink BSR included for padding;
(f) data from any UL Logical Channel, except data from UL-CCCH; data from SL logical channel including PC5-RRC;
(g) MAC CE for Recommended bit rate query;
(h) MAC CE for BSR included for padding.
(i) MAC control element for Sidelink BSR included for padding.

In [Table 4], each of the uplink data and sidelink data set as the priority of (f), that is, "data from any UL Logical Channel, except data from UL-CCCH; data from SL logical channel including PC5-RRC" For this, a priority value may be set. The priority value may be set as in the above priority value operation embodiment.

Examples of priority setting of (a) to (i) correspond to the setting for matching the transmission priority of sidelink data to the transmission priority of uplink data. For example, it may be used to determine the transmission priority of uplink data and sidelink data excluding uplink data transmitted through the UL CCCH. Criteria for setting the priorities among (a) to (i) for sidelink data and uplink data may be determined by referring to QoS profiles (requirements) of service packets transmitted and received through sidelink and uplink. The QoS profile may include, for example, at least one of urgency, low latency, high reliability, and high speed of a service packet. The criteria for setting the priority of (a) to (i) for the MAC CE may be determined based on whether or not the MAC CE is for controlling radio resources required for service packets transmitted and received through sidelink or uplink. The MAC CE that needs to be processed before the service packet may be set to a value having a higher transmission priority among (a) to (i). The MAC CE that is determined not to be urgently processed and needs to be processed later than the service packet may be set to a value having a lower transmission priority among (a) to (i).

Referring to the examples in [Table 1] to [Table 4],'MAC CE for BSR, with exception of BSR included for padding' (hereinafter,'BSR MAC CE') and'MAC control element for Sidelink BSR, with exception of With respect to the transmission priority of'Sidelink BSR included for padding' (hereinafter,'SL BSR MAC CE'), the case where it is determined that the transmission priority of the BSR MAC CE is higher than that of the SL BSR MAC CE has been described.

According to another embodiment, regardless of the examples of [Table 1] to [Table 4], transmission priorities of the BSR MAC CE and SL BSR MAC CE may be defined. For example, based on the transmission priority of each uplink data or sidelink data to be transmitted in the resources allocated to the terminal in response to reporting the BSR MAC CE or SL BSR MAC CE to the base station, BSR MAC CE or SL BSR MAC CE transmission priority can be determined. Through this, a QoS profile (requirement) required by uplink data or sidelink data may be supported.

As an embodiment, the transmission priority of uplink data to be transmitted on the allocated resource by reporting the BSR MAC CE to the base station is the sidelink data to be transmitted on the allocated resource by reporting the SL BSR MAC CE to the base station. If it is determined to be higher than the transmission priority, the UE may determine that the transmission priority of the BSR MAC CE is higher than that of the SL BSR MAC CE. At this time, the UE is allocated according to the transmission priority of the uplink data determined to have the highest transmission priority among at least one or more uplink data to be transmitted in the allocated resource according to the reporting of the BSR MAC CE and the SL BSR MAC CE. The transmission priority of sidelink data determined to have the highest transmission priority among at least one or more sidelink data to be transmitted from the resource may be compared.

As another embodiment, the transmission priority of uplink data to be transmitted on the allocated resource by reporting the BSR MAC CE to the base station is the sidelink data to be transmitted on the allocated resource by reporting the SL BSR MAC CE to the base station. If it is determined to be lower than the transmission priority, the UE may determine that the transmission priority of the BSR MAC CE is lower than that of the SL BSR MAC CE. At this time, the UE reports the transmission priority of uplink data determined to have the highest transmission priority among at least one or more uplink data to be transmitted in the allocated resource according to the reporting of the BSR MAC CE and the SL BSR MAC CE. The transmission priority of sidelink data determined to have the highest transmission priority among at least one or more sidelink data to be transmitted in the allocated resource may be compared.

In step 1307 of FIG. 13A, when the UE determines the transmission priority of one or more MAC CEs and one or more sidelink data, the UE may select [Table 1], [Table 2], [Table 3] or The MAC CE determined to have the highest priority can be selected based on [Table 4], and the priority is the highest based on [Table 1], [Table 2], [Table 3] or [Table 4] among sidelink data. Sidelink data judged to be high can be selected. The terminal may determine the transmission priority for the selected MAC CE and the selected sidelink data.

For example, if it is determined in step 1307 that the priority of at least one MAC CE corresponding to the uplink data is set to one of (a) to (e), the UE has the transmission priority of the uplink data It can be determined that it is higher than the transmission priority of. For another example, if it is not determined that the priority of at least one MAC CE corresponding to uplink data is set to one of (a) to (e) in step 1307, the UE has a transmission priority of sidelink data uplink. It can be determined that it is higher than the data transmission priority.

According to another embodiment of step 1309, the method of determining the transmission priority when the UE contains at least one uplink data, that is, uplink data for which a priority value has been set, is the first priority based on the priority value. Priority 1 may be additionally assigned to the uplink data rather than the uplink priority value determined to have a higher priority. For example, in the case of setting one of the priority values of step 16 and the priority values of 1 to 16, the lower the priority value, the higher the transmission priority. The priority can be operated with a priority value of 0 to 15. For example, if the priority value of the uplink determined to have the highest priority among one or more uplink data is 3, priority 1 is additionally assigned to determine that the priority value is 2 for uplink data. have.

In the embodiment of FIG. 13A, in [Table 1], [Table 2], [Table 3], and [Table 4], it has been described that SRB among uplink data and PC5-RRC and PC5-S among sidelink data are included. It goes without saying that the priority setting of [Table 1] to [Table 4] may not be applied to at least one of SRB, PC5-RRC, and PC5-S. In this case, the system may set priority for at least one of SRB, PC5-RRC, and PC5-S.

Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

13B is a flowchart 1330 of a terminal determining priority between uplink data and sidelink data in a wireless communication system according to various embodiments of the present disclosure. 13B illustrates an operation method of the terminal 120.

Referring to FIG. 13B, in step 1321, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1323, the UE may determine whether uplink data should be transmitted through PUCCH. In other words, the terminal may check whether data to be transmitted through the PUCCH is pending. If uplink data is to be transmitted through PUCCH, in step 1325, the terminal may determine that the transmission priority of uplink data is high. On the other hand, if the uplink data does not need to be transmitted through the PUCCH, in step 1327, the terminal may check the uplink data and the sidelink data. Here, the data may include MAC PDU. That is, the terminal can check a combination of data included in the uplink data and the sidelink data. In other words, the terminal may determine uplink data and sidelink data that are the targets of the transmission priority determination. In step 1329, the UE checks whether the uplink data includes data other than MAC CE.

If the uplink data does not include data other than the MAC CE, in step 1331, a transmission priority between the MAC CE and the sidelink data may be determined based on the priority value. To this end, the UE may compare the priority value of the MAC CE and the priority value of the sidelink data. When comparing the priority values of one or more MAC CEs with the priority values of one or more sidelink data, the UE selects the uplink data determined to have the highest priority according to the priority value among MAC CEs, and After selecting the sidelink data determined to have the highest priority according to the priority value among the link data, the priority value of the selected MAC CE and the priority value of the sidelink data may be compared. The priority value for the MAC CE may be set to the UE in the system or may be already stored in the UE. Even if the UE has previously stored the priority value for the MAC CE, if the system sets information on the priority value for the new MAC CE, the UE can use the information set by the system.

On the other hand, if the uplink data includes data other than the MAC CE, in step 1333, the UE may determine a transmission priority between uplink data including MAC CE and sidelink data based on the priority values. To this end, the UE may compare the priority value of the uplink data and the priority value of the sidelink data. When comparing the priority value of one or more uplink data with the priority value of one or more sidelink data, the UE selects the uplink data judged to have the highest priority according to the priority value among the uplink data. And, after selecting the sidelink data determined to have the highest priority according to the priority value among the sidelink data, the priority value of the selected uplink data and the priority value of the sidelink data may be compared. Uplink data may include at least one of SRB and DRB. The priority value for uplink data may be set to the terminal in the system. The sidelink data may include at least one of PC5-RRC, PC5-S, and SL-DRB. The priority value for sidelink data may be set to the terminal in the system.

The procedure illustrated in FIG. 13B is an embodiment in which the transmission priority of PUCCH among uplink data is defined higher than that of sidelink data. According to another embodiment, when the transmission priority of the PUCCH is not defined higher than the sidelink data, if the uplink data of the terminal includes the PUCCH, the terminal determines the priority of the PUCCH and the sidelink data using the procedure of FIG. 13A. Can be done to At this time, in the procedure of FIG. 13A, the PUCCH instead of the MAC CE may be a determination target, and priority settings for the PUCCH may be added to [Table 1], [Table 2], [Table 3], and [Table 4]. have.

According to an embodiment, when the transmission priority of the SRB among uplink data is defined higher than the sidelink data, if the uplink data includes the SRB, the UE performs the procedure of FIG. 13B to set the priority of the SRB and the sidelink data. Can be done to judge. In this case, in the procedure of FIG. 13B, the SRB may be determined instead of the PUCCH.

According to another embodiment, when the transmission priority of the SRB is not defined higher than the sidelink data, if the uplink data includes the SRB, the UE uses the procedure of FIG. 13A to determine the priority of the SRB and the sidelink data. Can be done. At this time, in the procedure of FIG. 13A, the SRB may be determined instead of the MAC CE, and priority settings for the SRB may be added to [Table 1], [Table 2], [Table 3], and [Table 4]. have.

Meanwhile, for methods of determining transmission priority between uplink data including MAC CE and sidelink data according to various embodiments of FIGS. 9A to 13B, uplink data including at least one MAC CE is The basis for determining that the priority is higher than the data is that the MAC CE prioritizes that the transmission priority should be higher than the general data because it is data containing information that requires fast processing by transferring to the receiving end quickly. According to another embodiment, the basis for determining that the priority of sidelink data is higher than that of uplink data including at least one MAC CE is a QoS profile required by the sidelink data, that is, a requirement is higher than that of the MAC CE. It prioritizes that the transmission priority should be high because data contains information that requires low latency, high reliability, high speed, and urgency.

The UE determines a transmission priority between uplink data and sidelink data according to at least one embodiment of FIGS. 9A to 13B, and determines the priority of the link data determined to be transmitted first and the data determined not to be transmitted preferentially. On the other hand, the terminal may perform operations as shown in FIG. 14A or 14 below.

14A is a flowchart 1410 of a terminal after determining a priority between uplink data and sidelink data according to various embodiments of the present disclosure. 14A illustrates a method of operating the terminal 120.

Referring to FIG. 14A, in step 1401, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1403, the UE determines a transmission priority between uplink data and sidelink data. For example, the UE may determine a transmission priority between uplink data and sidelink data according to any one of the embodiments described with reference to FIGS. 9A to 13B.

In step 1405, the terminal may determine whether the transmission priority between the uplink data and the sidelink data determined in step 1403 is the same. If it is determined that the transmission priority of the uplink and the sidelink is the same, in step 1407, the UE determines to transmit the link data by selecting a random link among the sidelink and the uplink, and drops the data of the remaining links. You can judge what to do. On the other hand, if it is determined that the transmission priorities of the uplink and the sidelink are not the same, in step 1409, the terminal determines to drop data of the link determined to have a low transmission priority, and the link determined to have a high transmission priority. It can be determined to transmit data.

14B is a flowchart 1430 of a terminal after determining a priority between uplink data and sidelink data according to various embodiments of the present disclosure. 14B illustrates an operation method of the terminal 120.

Referring to FIG. 14B, in step 1421, the UE may determine the need to determine a transmission priority between uplink data and sidelink data. For example, it is determined that the terminal cannot simultaneously transmit uplink data and sidelink data due to hardware constraints of the terminal, or it is determined that the uplink data and sidelink data cannot be simultaneously transmitted at a predetermined power level for each link. If so, it may be necessary to determine a transmission priority between uplink data and sidelink data.

In step 1423, the UE determines a transmission priority between uplink data and sidelink data. For example, the UE may determine a transmission priority between uplink data and sidelink data according to any one of the embodiments described with reference to FIGS. 9A to 13B.

In step 1425, the terminal may determine whether the transmission priority between the uplink data and the sidelink data determined in step 1423 is the same. If it is determined that the transmission priority of the uplink and the sidelink is the same, in step 1427, the terminal selects a link between the sidelink and the uplink and determines to transmit the link data at a set transmission power level, and the remaining It may be determined to transmit the link data at a transmission power level lower than the set transmission power. Here, the set transmission power means power determined by the terminal or indicated by the base station according to the power control algorithm adopted by the system.

On the other hand, if it is determined that the transmission priority of the uplink and the sidelink is not the same, in step 1429, the terminal determines to transmit the data of the link determined to have a low transmission priority at a transmission power level lower than the set transmission power, and transmits It may be determined to transmit data of a link determined to have a high priority at a set transmission power level. Here, the set transmission power means power determined by the terminal or indicated by the base station according to the power control algorithm adopted by the system.

The uplink packet may include at least one of a packet transmitted through an uplink data bearer logical channel, a packet transmitted through an uplink signaling bearer logical channel, and an uplink MAC CE. The sidelink packet may include at least one of a packet transmitted on a sidelink data bearer logical channel, a packet transmitted on a sidelink signaling bearer logical channel, and a sidelink MAC CE. In this case, the transmission priority between uplink packets or sidelink packets may be processed as follows.

The terminal may compare a transmission priority value set in a logical channel of a packet transmitted from an uplink data bearer with a set threshold. When a packet transmitted from the uplink data bearer includes a plurality of logical channels, the terminal may compare a transmission priority value of a logical channel having the largest transmission priority value among the plurality of logical channels with a set threshold.

The UE may compare a transmission priority value set in a logical channel of a packet transmitted from an uplink signaling bearer with a set threshold. For example, if a packet transmitted from the uplink signaling bearer includes a plurality of logical channels, the terminal may compare the transmission priority value of the logical channel having the largest transmission priority value among the plurality of logical channels with a set threshold. .

The UE may compare the transmission priority value set in the uplink MAC CE with the set threshold. For example, if a plurality of uplink MAC CEs are included, the UE may compare the transmission priority value of the MAC CE having the largest transmission priority value among the plurality of uplink MAC CEs with a set threshold.

When a separate transmission priority value is not set for the uplink MAC CE, the transmission priority value of the MAC CE is set based on the transmission priority value of the logical channel of the uplink data bearer corresponding to the MAC CE, or It may be set based on a transmission priority value of a logical channel of an uplink signaling bearer. For example, the transmission priority of the UL buffer status report (BSR) MAC CE may be set based on the transmission priority value of the logical channel reported by the UL BSR MAC CE. When information on a plurality of logical channels is included in one UL BSR MAC CE, the transmission priority of the corresponding UL BSR MAC CE is set based on the transmission priority value of the largest logical channel among the plurality of logical channels. I can.

When the uplink packet to be transmitted includes at least one of a packet transmitted on a data bearer logical channel, a packet transmitted on a signaling bearer logical channel, and a MAC CE, the terminal determines the transmission priority value of the packet with the highest transmission priority value. It can be compared with the set threshold.

The terminal may compare a transmission priority value set in a logical channel of a packet transmitted from the sidelink data bearer with a set threshold. When a packet transmitted from the sidelink data bearer includes a plurality of logical channels, the terminal may compare a transmission priority value of a logical channel having the largest transmission priority value among the plurality of logical channels with a set threshold.

The UE may compare a transmission priority value set in a logical channel of a packet transmitted from the sidelink signaling bearer with a set threshold. When a packet transmitted from the sidelink signaling bearer includes a plurality of logical channels, the UE may compare a transmission priority value of a logical channel having the largest transmission priority value among the plurality of logical channels with a set threshold.

The UE may compare a transmission priority value set in the sidelink MAC CE with a set threshold. When a plurality of sidelink MAC CEs are included, the UE may compare the transmission priority value of the MAC CE having the largest transmission priority value among the plurality of sidelink MAC CEs with a set threshold.

When a separate transmission priority value is not set for the sidelink MAC CE, the transmission priority value of the MAC CE is set based on the transmission priority value of the logical channel of the sidelink data bearer corresponding to the MAC CE, or Alternatively, it may be set based on the transmission priority value of the logical channel of the sidelink signaling bearer.

When the sidelink packet to be transmitted includes at least one of a packet transmitted on a data bearer logical channel, a packet transmitted on a signaling bearer logical channel, and a MAC CE, the terminal determines the transmission priority value of the packet with the highest transmission priority value. It can be compared with the set threshold.

The transmission priority threshold of the uplink packet and/or the transmission priority threshold of the sidelink packet may be set in the terminal and may be set to the same value or different values.

Regarding the transmission priority between the uplink packet and the sidelink packet, if it is determined that the transmission priority value of the uplink packet is greater than the threshold value and the transmission priority value of the sidelink packet is less than the threshold value, the UE transmits the transmission priority of the uplink packet. Can be judged to be high. If it is determined that the above-described condition is not satisfied, the terminal may determine that the transmission priority of the sidelink packet is high.

As another embodiment, with respect to the transmission priority between an uplink packet and a sidelink packet, if it is determined that the transmission priority value of the uplink packet is lower than the threshold and the transmission priority value of the sidelink packet is higher than the threshold, the UE It can be determined that the packet transmission priority is high. If it is determined that the above-described condition is not satisfied, the terminal may determine that the transmission priority of the sidelink packet is high.

Embodiments of uplink physical signaling transmitted on at least PUSCH or PUCCH according to various embodiments of the present invention include HARQ feedback, scheduling request (SR) RSRP, beam management, and It may include at least one of CQI, CSI-RS, and SRS, and it goes without saying that the present invention is not limited to the above example. An embodiment of sidelink physical signaling transmitted on a sidelink physical channel may include at least one of HARQ feedback, SL-RSPR, SL-CQI, and SL-SRS, and the present invention is not limited to the above example. Of course not.

As a method of determining the transmission priority of uplink physical signaling or sidelink physical signaling, at least one of the following embodiments may be applied, and the transmission priority determination method may be applied differently for each physical signaling.

(1) A transmission priority value may be set for uplink physical signaling. The UE may compare a transmission priority value of uplink physical signaling with a set threshold. When a plurality of uplink physical signaling is included, the terminal may compare the transmission priority value of the physical signaling having the largest transmission priority value among the plurality of uplink physical signaling with a set threshold.

A transmission priority value may be set for sidelink physical signaling. The terminal may compare the transmission priority value of sidelink physical signaling with a set threshold. When a plurality of sidelink physical signaling is included, the terminal may compare the transmission priority value of the physical signaling having the largest transmission priority value among the plurality of sidelink physical signaling with a set threshold.

In the case of (1), the UE can compare the sidelink signaling with the highest transmission priority value with the set threshold for at least one of sidelink physical layer signaling and sidelink packets to be transmitted, and the uplink physical layer to be transmitted The uplink signaling having the highest transmission priority value for at least one of physical layer signaling and uplink packets may be compared with a set threshold. When it is determined that the transmission priority value of sidelink signaling is greater than the set threshold and the transmission priority value of uplink signaling is less than the set threshold, the terminal may determine that the transmission priority of sidelink signaling is high. If it is determined that the above-described condition is not satisfied, it may be determined that the transmission priority of uplink signaling is high. Here, it is assumed that the higher the transmission priority value, the higher the priority.

(2) A transmission priority value may be set for uplink physical signaling. A transmission priority value may be set for sidelink physical signaling. The UE may compare a transmission priority value of uplink physical signaling and a transmission priority value of sidelink physical signaling. When a plurality of uplink physical signaling is included, the terminal may determine a transmission priority value of the uplink physical signaling having the largest transmission priority value among the plurality of uplink physical signaling as a comparison target. When a plurality of sidelink physical signaling is included, the UE may determine a transmission priority value of the sidelink physical signaling having the largest transmission priority value among the plurality of sidelink physical signaling as a comparison target.

In the case of (2), the UE transmits at least one of sidelink signaling and uplink physical layer signaling to be transmitted with the highest transmission priority value for at least one of sidelink physical layer signaling and sidelink packets to be transmitted, and uplink packets. Uplink signaling with the highest priority value can be compared. If it is determined that the transmission priority value of sidelink signaling is greater than the transmission priority value of uplink signaling, the terminal may determine that the transmission priority of sidelink signaling is high. If it is determined that the above-described condition is not satisfied, it may be determined that the transmission priority of uplink signaling is high. Here, it is assumed that the higher the transmission priority value, the higher the priority.

(3) A separate transmission priority value may not be set for uplink physical signaling. At this time, the transmission priority value of the uplink physical signaling will be set based on the transmission priority value of the uplink packet (e.g., at least one of a data bearer logical channel, a signaling bearer logical channel, and MAC CE) corresponding to the uplink physical signaling. I can. When there are multiple uplink packets corresponding to uplink physical signaling, the priority value of uplink physical signaling is set based on the transmission priority value of the uplink packet with the largest transmission priority value among the plurality of uplink packets. Can be.

A separate transmission priority value may not be set for sidelink physical signaling. At this time, the transmission priority value of the sidelink physical signaling is set based on the transmission priority value of the sidelink packet (e.g., at least one of a data bearer logical channel, a signaling bearer logical channel, and MAC CE) corresponding to the sidelink physical signaling. Can be. When there are multiple sidelink packets corresponding to sidelink physical signaling, the priority value of sidelink physical signaling is set based on the transmission priority value of the sidelink packet with the highest transmission priority value among the plurality of sidelink packets. Can be.

In the case of the embodiment of (3), the terminal may compare the sidelink signaling with the highest transmission priority value for at least one of sidelink physical layer signaling and sidelink packet to be transmitted and a set threshold, and uplink physical layer signaling to be transmitted. , For at least one of the uplink packets, uplink signaling having the highest transmission priority value may be compared with a set threshold. When it is determined that the transmission priority value of sidelink signaling is greater than the set threshold and the transmission priority value of uplink signaling is less than the set threshold, the terminal may determine that the transmission priority of sidelink signaling is high. If it is determined that the above-described condition is not satisfied, it may be determined that the transmission priority of uplink signaling is high. Here, it is assumed that the higher the transmission priority value, the higher the priority.

In the case of another embodiment of (3), the terminal is at least one of sidelink signaling and uplink physical layer signaling to be transmitted, the sidelink signaling with the highest transmission priority value for at least one of sidelink physical layer signaling and sidelink packets to be transmitted, and uplink packets. Uplink signaling having the largest transmission priority value for can be compared. If it is determined that the transmission priority value of sidelink signaling is greater than the transmission priority value of uplink signaling, the terminal may determine that the transmission priority of sidelink signaling is high. If it is determined that the above-described condition is not satisfied, it may be determined that the transmission priority of uplink signaling is high. Here, it is assumed that the higher the transmission priority value, the higher the priority.

(4) A separate transmission priority value may not be set for uplink physical signaling. At this time, the transmission priority of uplink physical signaling may be set based on at least one transmission priority value among sidelink packets (e.g., data bearer logical channel, signaling bearer logical channel, MAC CE) and/or sidelink physical signaling. have. When the number of sidelink packets and/or sidelink physical signaling is more than one, the transmission priority value may be set based on the highest sidelink packet and/or the transmission priority value of the sidelink physical signaling. When it is determined that the transmission priority value of the sidelink packet and/or the sidelink physical signaling is greater than the set threshold, the terminal may determine that the transmission priority of the sidelink is high. If it is determined that the above-described condition is not satisfied, the UE may determine that the uplink transmission priority is high.

(5) A separate transmission priority value may not be set for sidelink physical signaling. At this time, the transmission priority of sidelink physical signaling is to be set based on at least one transmission priority value among uplink packets (e.g., data bearer logical channel, signaling bearer logical channel, MAC CE) and/or uplink physical signaling. I can. When there are a plurality of uplink packets and/or uplink physical signaling, the transmission priority value of the uplink packet and/or uplink physical signaling is a transmission priority value among the plurality of uplink packets and/or uplink physical signaling. It may be set based on a transmission priority value of the largest uplink packet and/or uplink physical signaling. If it is determined that the transmission priority value of the uplink packet and/or the uplink physical signaling is greater than the set threshold, the UE may determine that the uplink transmission priority is high. If it is determined that the above-described condition is not satisfied, the terminal may determine that the transmission priority of the sidelink is high.

As various embodiments of the present invention, a method of determining the priority of uplink physical signaling transmission and sidelink transmission transmitted on at least PUSCH or PUCCH may include at least one of the embodiments described below.

(1) The terminal may determine whether to prioritize uplink physical signaling transmission based on the transmission priority of the sidelink packet. Here, the transmission priority value of the sidelink packet may be set to the terminal. When it is determined that the transmission priority of the sidelink packet is high, for example, if it is determined that the transmission priority of the sidelink packet is higher than a set threshold, the terminal may determine to prioritize the uplink physical signaling. When it is determined that the transmission priority of the sidelink packet is low, for example, if it is determined that the transmission priority of the sidelink packet is lower than a set threshold, the terminal may determine to preferentially process uplink physical signaling. In the above embodiment, it is assumed that the higher the transmission priority value, the higher the priority.

(2) The terminal may determine whether to have a transmission priority based on the transmission priority of the sidelink packet and the transmission priority of the uplink physical signaling. Here, a transmission priority value of uplink physical signaling and a transmission priority value of a sidelink packet may be set to the terminal. When it is determined that the transmission priority of the sidelink packet is high, for example, if it is determined that the transmission priority of the sidelink packet is higher than the set threshold and the transmission priority of the uplink physical signaling is lower than the set threshold, the UE gives priority to the sidelink packet. It can be determined to be treated as. If the terminal does not satisfy the above condition, it may be determined to preferentially process uplink physical signaling. Alternatively, if it is determined that the transmission priority of the sidelink packet is lower than the threshold and the transmission priority of the uplink physical signaling is higher than the threshold, the UE may determine to process the uplink physical signaling with priority. If the above-described condition is not satisfied, the terminal may determine to preferentially process the sidelink packet. In the above-described embodiment, it is assumed that the higher the transmission priority value, the higher the priority.

(3) The terminal may determine whether to have a transmission priority based on the transmission priority of the sidelink packet and the transmission priority of the uplink physical signaling. Here, the transmission priority value of the sidelink packet may be set to the terminal. The transmission priority value of uplink physical signaling may be set based on a transmission priority value of an uplink packet related to the uplink physical signaling. When it is determined that the transmission priority of the sidelink packet is high, for example, if it is determined that the transmission priority of the sidelink packet is higher than the set threshold and the transmission priority of the uplink physical signaling is lower than the set threshold, the UE gives priority to the sidelink packet. It can be determined to be treated as. If the above-described condition is not satisfied, the UE may determine to preferentially process uplink physical signaling. Alternatively, if it is determined that the transmission priority of the sidelink packet is lower than the threshold and the transmission priority of the uplink physical signaling is higher than the threshold, the UE may determine to process the uplink physical signaling with priority. If the above-described condition is not satisfied, the terminal may determine to preferentially process the sidelink packet. In the above-described embodiment, it is assumed that the higher the transmission priority value, the higher the priority.

(4) The UE may determine the transmission priority by comparing the transmission priority value of the sidelink packet and the transmission priority value of the uplink physical signaling. The transmission priority value of the sidelink packet may be set to the terminal. The transmission priority value of uplink physical signaling may be set to the terminal, or, if not set, may be set based on a transmission priority value of an uplink packet related to the uplink physical signaling. When a plurality of sidelink packets are included, the terminal may compare the transmission priority based on the sidelink packet having the largest transmission priority value among the plurality of sidelink packets. When there are a plurality of uplink physical signaling, the terminal may compare the transmission priority based on the uplink physical signaling having the largest transmission priority value among the plurality of uplink physical signaling. When it is determined that the transmission priority value of the sidelink packet is large by comparing the transmission priority value of the sidelink packet with the transmission priority value of the uplink physical signaling, the terminal may determine to process the sidelink packet with priority. If it is determined that the above-described condition is not satisfied, the UE may determine to preferentially process uplink physical signaling.

The above-described embodiments of (1) or (2) or (3) or (4) will be implemented as a method of determining the priority of uplink physical signaling transmission and sidelink HARQ feedback signaling transmission transmitted on at least PUSCH or PUCCH. I can. The transmission priority value of the sidelink HARQ feedback signaling may be set based on a transmission priority value of a sidelink packet corresponding to the sidelink HARQ feedback. When there are multiple logical channels of the sidelink packet corresponding to the sidelink HARQ feedback, the transmission priority value of the sidelink HARQ feedback signaling is a sidelink packet corresponding to the logical channel having the largest transmission priority value among the plurality of logical channels. It can be set based on the transmission priority value of. Here, it is assumed that the higher the transmission priority value, the higher the priority.

As various embodiments of the present invention, a method of determining the priority between (A) uplink physical signaling transmission and (B) uplink physical signaling transmission related to sidelink packet transmission transmitted on a PUSCH or PUCCH is one of the following embodiments. It may include at least one. (B) Uplink physical signaling related to sidelink packet transmission is information for sidelink communication, and may include control information transmitted to the base station. For example, SR for sidelink communication or sidelink packet It may include at least one of HARQ ACK/NACK information. For example, when determining the priority of an SR for transmission of an uplink packet transmitted on a PUSCH or a PUCCH and an SR for transmission of a sidelink packet, at least one of the embodiments described below may be implemented.

This scheme is for the case where the transmission priority value is set for the uplink physical signaling of (A) transmitted on the PUSCH or PUCCH and/or the transmission priority value is not set for the uplink physical signaling of (A). Can be applied. This scheme is for the case where the transmission priority value is set for the uplink physical signaling related to the sidelink packet transmission of (B) and/or the transmission priority value is not set for the uplink physical signaling of (B). Can be applied.

(1) When the transmission priority value is set for (A)

(2) Although the transmission priority value is not set for (A), based on the transmission priority of the uplink packet (e.g., data bearer logical channel, signaling bearer logical channel, MAC CE) corresponding to (A), (A ) If the transmission priority value can be set

(3) When the transmission priority value is not set for (A)

(4) When the transmission priority value is set for (B)

(5) Although the transmission priority value is not set for (B), based on the transmission priority of the uplink packet (e.g., data bearer logical channel, signaling bearer logical channel, MAC CE) corresponding to (B), (B ) If the transmission priority value can be set

(6) When the transmission priority value is not set for (B)

Among the cases (1) to (6), when the transmission priority can be determined based on the transmission priority value for (A) and (B), for example, a combination of (1) and (3) , In the case of a combination of (1) and (4), a combination of (2) and (3), or a combination of (2) and (4), according to an embodiment, the transmission priority of (A) and (B) May be determined by comparing with the threshold set for (A) and with the threshold set for (B). When it is determined that the transmission priority value of (A) is greater than the set threshold and it is determined that the transmission priority value of (B) is less than the set threshold, the terminal may determine to process (A) with priority. If the above-described condition is not satisfied, it may be determined to preferentially process (B). Here, it is assumed that the higher the transmission priority value, the higher the transmission priority. As another embodiment, the transmission priority values of (A) and (B) may be determined by comparing the transmission priority value of (A) and the transmission priority value of (B). If it is determined that the transmission priority value of (A) is greater than the transmission priority value of (B), the terminal may determine to process (A) with priority. If the above-described condition is not satisfied, it may be determined to preferentially process (B).

In cases (1) to (6), when the transmission priority cannot be determined based on the transmission priority value for either (A) or (B), for example, (1) and (6) ), the combination of (2) and (6), the combination of (3) and (4), or the combination of (3) and (5), the terminal is based on a link that can set the transmission priority value. By comparing the transmission priority value and the set threshold value, transmission priority can be determined. Here, "priority processing" or "priority processing" refers to an operation of first transmitting a packet having a high transmission priority according to the identified priority. As an embodiment, when it is possible to determine the transmission priority value for (A), if it is determined that the transmission priority value of (A) is greater than the set threshold, the terminal may determine to process (A) with priority. have. If it is determined that the above-described condition is not satisfied, the terminal may determine to preferentially process (B). According to another embodiment, when it is possible to determine the transmission priority value for (B), if it is determined that the transmission priority value of (B) is greater than the set threshold, the terminal determines to process (B) with priority. can do. If it is determined that the above-described condition is not satisfied, the terminal may determine to preferentially process (A).

Among the cases (1) to (6), when the transmission priority cannot be determined based on the transmission priority value for (A) and (B), for example, a combination of (3) and (6) In the case of (A) and (B), the UE may arbitrarily determine the transmission priority processing.

The priority between the UL buffer status report (BSR) MAC CE transmitted through the uplink and the SL buffer status report MAC CE transmitted through the uplink may be determined as follows.

(1) A transmission priority value can be separately set for the UL BSR MAC CE.

(2) The transmission priority value can be separately set for the SL BSR MAC CE.

(3) When the transmission priority value is not separately set for the UL BSR MAC CE, the transmission priority of the UL BSR MAC CE may be set based on the transmission priority value of the logical channel reported by the UL BSR MAC CE. . When information on a plurality of logical channels is included in one UL BSR MAC CE, the transmission priority of the corresponding UL BSR MAC CE is set based on the transmission priority value of the largest logical channel among the plurality of logical channels. I can.

(4) If the transmission priority value is not separately set for the SL BSR MAC CE, the transmission priority of the SL BSR MAC CE may be set based on the transmission priority value of the logical channel reported by the SL BSR MAC CE. . When information on a plurality of logical channels is included in one SL BSR MAC CE, the transmission priority of the corresponding SL BSR MAC CE is the transmission priority value of the logical channel having the highest transmission priority among the plurality of logical channels. It can be set on a basis.

The UE may determine a transmission priority between UL BSR MAC CE transmitted through uplink and SL BSR MAC CE transmitted through uplink according to at least one embodiment to be described later.

-The UE may compare the transmission priority value of the UL BSR MAC CE and the transmission priority value of the SL BSR MAC CE. If the transmission priority value of the UL BSR MAC CE is greater than the transmission priority value of the SL BSR MAC CE, the UE may determine to preferentially process the UL BSR MAC CE. If the above-described condition is not satisfied, the UE may determine to preferentially process the SL BSR MAC CE.

-The UE can compare the transmission priority value of the UL BSR MAC CE with a set threshold. have. The UE may compare the transmission priority value of the SL BSR MAC CE with a set threshold. The threshold may be set to the same value or a different value. When it is determined that the transmission priority value of the UL BSR MAC CE is greater than the threshold value and the transmission priority value of the SL BSR MAC CE is less than the threshold value, the UE may determine to preferentially process the UL BSR MAC CE. If the above-described condition is not satisfied, the UE may determine to preferentially process the SL BSR MAC CE.

-The UE may compare the transmission priority value of the UL BSR MAC CE with a set threshold. If it is determined that the transmission priority value of the UL BSR MAC CE is greater than the threshold value, the UE may determine to process the UL BSR MAC CE with priority. If the above-described condition is not satisfied, the UE may determine to preferentially process the SL BSR MAC CE.

-The UE may compare the transmission priority value of the SL BSR MAC CE with a set threshold. If it is determined that the transmission priority value of the SL BSR MAC CE is greater than the threshold value, the UE may determine to preferentially process the SL BSR MAC CE. If the above-described condition is not satisfied, the terminal may determine to preferentially process the UL BSR MAC CE.

The methods according to the embodiments described in the claims or the specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

When implemented in software, a computer-readable storage medium storing one or more programs (software modules) may be provided. One or more programs stored in a computer-readable storage medium are configured to be executable by one or more processors in an electronic device (device). The one or more programs include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present disclosure.

These programs (software modules, software) include random access memory, non-volatile memory including flash memory, read only memory (ROM), and electrically erasable programmable ROM. (EEPROM: Electrically Erasable Programmable Read Only Memory), magnetic disc storage device, Compact Disc-ROM (CD-ROM), Digital Versatile Discs (DVDs), or other types of It may be stored in an optical storage device or a magnetic cassette. Alternatively, it may be stored in a memory composed of a combination of some or all of them. In addition, a plurality of configuration memories may be included.

In addition, the program is accessed through a communication network such as the Internet, Intranet, LAN (Local Area Network), WLAN (Wide LAN), or SAN (Storage Area Network), or a communication network composed of a combination thereof. It may be stored in an (access) attachable storage device. Such a storage device may access a device performing an embodiment of the present disclosure through an external port. In addition, a separate storage device on the communication network may access a device performing an embodiment of the present disclosure.

In the above-described specific embodiments of the present disclosure, components included in the disclosure are expressed in the singular or plural according to the presented specific embodiments. However, the singular or plural expression is selected appropriately for the situation presented for convenience of description, and the present disclosure is not limited to the singular or plural constituent elements, and even constituent elements expressed in plural are composed of the singular or in the singular. Even the expressed constituent elements may be composed of pluralities.

Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, various modifications are possible without departing from the scope of the present disclosure. Therefore, the scope of the present disclosure is limited to the described embodiments and should not be determined, and should be determined by the scope of the claims as well as the equivalents of the claims to be described later.

Claims (17)

In the method of operating a terminal in a wireless communication system,
The process of determining the priority between uplink data and sidelink data, and
Transmitting one data having a high priority among the uplink data and the sidelink data, and
And transmitting the remaining data of the uplink data and the sidelink data with a lower transmission power compared to a case where the remaining data is dropped or the remaining data is determined to have a high priority.
The method according to claim 1,
When the uplink data includes a physical uplink control channel (PUCCH), the uplink data is determined as one data having a high priority.
The method according to claim 1,
When the uplink data does not include data other than a media access control (MAC) control element (CE), the uplink data is determined as one data having a high priority.
The method according to claim 1,
When the uplink data does not include data other than a media access control (MAC) control element (CE), the sidelink data is determined as one data having a high priority.
The method according to claim 1,
When the uplink data does not include data other than a media access control (MAC) control element (CE) and the MAC CE belongs to a predefined group, the uplink data is one data having a high priority. How it is determined.
The method according to claim 1,
When the uplink data does not include data other than a media access control (MAC) control element (CE) and the priority value of the sidelink data exceeds a threshold, the sidelink data has a high priority. How it is determined by the data.
The method according to claim 1,
When the uplink data includes a media access control (MAC) control element (CE), the sidelink data is determined as one data having a high priority.
The method according to claim 1,
When the uplink data includes a media access control (MAC) control element (CE), the uplink data is determined as one data having a high priority.
In a terminal in a wireless communication system,
Transceiver and,
Including at least one processor connected to the transceiver,
The at least one processor,
Determine the priority between uplink data and sidelink data,
Transmitting one data having a high priority among the uplink data and the sidelink data,
A terminal transmitting the remaining data of the uplink data and the sidelink data with a lower transmission power compared to a case where the remaining data is dropped or the remaining data is determined to have a high priority.
The method of claim 9,
When the uplink data includes a physical uplink control channel (PUCCH), the uplink data is determined as one data having a high priority.
The method of claim 9,
When the uplink data does not include data other than a media access control (MAC) control element (CE), the uplink data is determined as one data having a high priority.
The method of claim 9,
When the uplink data does not include data other than a media access control (MAC) control element (CE), the sidelink data is determined as one data having a high priority.
The method of claim 9,
When the uplink data does not include data other than a media access control (MAC) control element (CE) and the MAC CE belongs to a predefined group, the uplink data is one data having a high priority. Terminal to be determined.
The method of claim 9,
When the uplink data does not include data other than a media access control (MAC) control element (CE) and the priority value of the sidelink data exceeds a threshold, the sidelink data has a high priority. Terminal determined by the data of.
The method of claim 9,
When the uplink data includes a media access control (MAC) control element (CE), the sidelink data is determined as one data having a high priority.
The method of claim 9,
When the uplink data includes a media access control (MAC) control element (CE), the uplink data is determined as one data having a high priority.
The method of claim 9,
The uplink data includes a first buffer state report (BSR) media access control (MAC) control element (CE), and the sidelink data includes a second BSR MAC CE, allocated in response to the first BSR. Based on a priority value of first data to be transmitted in uplink through a resource and a priority value of second data to be transmitted in sidelink through a resource allocated in response to the second BSR, the uplink data and the side A terminal whose priority is determined between link data.

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