Apparatus and method for supporting terminal bypass operation in discontinuous reception mode in wireless communication system

Abstract

This disclosure provides a method for operating a first terminal in a wireless communication system. The method for operating the first terminal may include: sending bypass discontinuous reception mode preference information to a base station; receiving Uu discontinuous reception mode configuration information from the base station based on the bypass discontinuous reception mode preference information; and sending data to a second terminal based on at least one of the Uu discontinuous reception mode configuration information and the bypass discontinuous reception configuration information.

Description

Technical Field

[0001] This disclosure relates to a wireless communication system, and more specifically, to a method and apparatus for processing bypass-based data transmission or reception when a terminal in a wireless communication system performs discontinuous reception (DRX) in a connection mode. Background Technology

[0002] Since the commercialization of fourth-generation (4G) communication systems, efforts have been made to develop advanced fifth-generation (5G) or pre-5G communication systems to meet the growing demand for wireless data services. For this reason, 5G or pre-5G communication systems are also referred to as systems beyond fourth-generation (4G) network communication systems or post-Long Term Evolution (LTE) systems.

[0003] The implementation of 5G communication systems using ultra-high frequency (millimeter wave (mmWave)) bands (e.g., the 60 GHz band) is being considered to achieve higher data transmission rates. To reduce radio wave propagation loss and increase transmission range in the ultra-high frequency band, beamforming, massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and large antenna technologies are being discussed.

[0004] To improve system networks, technologies are being developed for advanced small cells, cloud radio access networks (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, cooperative communication, coordinated multipoint (CoMP), and receiver interference cancellation in 5G communication systems.

[0005] In addition, advanced coding and modulation (ACM) methods, such as hybrid FSK and QAM modulation (FQAM), sliding window superposition coding (SWSC), and advanced access technologies, such as filter bank multicarrier (FBMC), non-orthogonal multiple access (NOMA), and sparse code multiple access (SCMA), are being developed in 5G systems.

[0006] Meanwhile, the internet is evolving from a human-oriented network of connections where humans generate and consume information into a network of distributed entities or things that send, receive, and process information without human intervention—the Internet of Things (IoT). The Internet of Everything (IoE) technology has also emerged, for example, by combining big data processing technologies connected to cloud servers with IoT technologies. To realize IoT, various technologies are needed, such as sensing technologies, wired / wireless communication and network infrastructure, service interface technologies, and security technologies. Currently, technologies for connecting things, such as sensor networks, machine-to-machine (M2M) communication, and machine-type communication (MTC), are also under research. In the IoT environment, intelligent internet technology (IT) services can be provided, creating new value for human life by collecting and analyzing data generated from connected things. Through the convergence and integration of existing information technology (IT) and various industrial applications, IoT can be applied to a wide range of fields, such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, healthcare, smart appliances, and advanced medical services.

[0007] In this regard, various attempts are underway to apply 5G communication systems to IoT networks. For example, technologies related to sensor networks, M2M, and MTC are being implemented using 5G communication technologies, such as beamforming, MIMO, and array antenna schemes. Even the application of cloud radio access networks (cloud RAN) as a means of processing the aforementioned big data could be an example of the integration of 5G and IoT technologies.

[0008] In addition, terminal-directed communication (bypass communication) using 5G communication systems is being studied, and it is expected that bypass communication will provide various services to users by being applied to, for example, vehicle-to-everything (V2X). Summary of the Invention

[0009] Technical issues

[0010] This disclosure provides an apparatus and method for processing bypass-based data transmission or reception in a wireless communication system when a terminal performs discontinuous reception (DRX) in Radio Resource Control (RRC) Connection (RRC_CONNECTED) mode.

[0011] Technical solution

[0012] This disclosure may disclose a method for operating a first user equipment (UE) in a wireless communication system. The method for operating the first UE includes: sending bypass discontinuous reception (DRX) preference information to a base station (BS); receiving Uu DRX configuration information from the BS based on the bypass DRX preference information; and sending data to a second UE based on at least one of the Uu DRX configuration information and the bypass DRX configuration information. Attached Figure Description

[0013] Figure 1 A wireless communication system according to an embodiment of the present disclosure is shown.

[0014] Figure 2 This is a block diagram of a base station (BS) in a wireless communication system according to an embodiment of the present disclosure.

[0015] Figure 3 This is a block diagram of a user equipment (UE) in a wireless communication system according to embodiments of the present disclosure.

[0016] Figure 4 This is a block diagram of a communicator in a wireless communication system according to an embodiment of the present disclosure.

[0017] Figure 5 The structure of radio time-frequency resources in a wireless communication system according to an embodiment of the present disclosure is shown.

[0018] Figure 6a A bypass communication scenario according to an embodiment of the present disclosure is illustrated.

[0019] Figure 6b A bypass communication scenario according to an embodiment of the present disclosure is illustrated.

[0020] Figure 6c A bypass communication scenario according to an embodiment of the present disclosure is illustrated.

[0021] Figure 6d A bypass communication scenario according to an embodiment of the present disclosure is illustrated.

[0022] Figure 7a This is a diagram illustrating a bypass communication transmission method according to embodiments of the present disclosure.

[0023] Figure 7b This is a diagram illustrating a bypass communication transmission method according to embodiments of the present disclosure.

[0024] Figure 8 This is a diagram illustrating the operation of network processing of UE discontinuous reception (DRX) configuration according to an embodiment of the present disclosure.

[0025] Figure 9a , Figure 9b , Figure 9c , Figure 9d and Figure 9e This is a diagram illustrating the operation of a UE processing DRX configuration according to an embodiment of this disclosure.

[0026] Figure 10a and Figure 10b This is a diagram illustrating the operation of a UE processing DRX configuration according to an embodiment of the present disclosure.

[0027] Figure 11 This is a diagram illustrating the operation of a UE processing bypass DRX and Uu link DRX according to an embodiment of this disclosure.

[0028] Figure 12 This is a diagram illustrating the operation of a UE processing bypass DRX and Uu link DRX according to an embodiment of this disclosure.

[0029] Figure 13 This is a diagram illustrating the operation of a UE processing bypass DRX and Uu link DRX according to an embodiment of this disclosure. Detailed Implementation

[0030] According to embodiments of this disclosure, a method for operating a first UE in a wireless communication system can be provided. The method for operating the first UE may include: sending bypass discontinuous reception (DRX) preference information to a base station (BS); receiving Uu DRX configuration information from the BS based on the bypass DRX preference information; and sending data to a second UE based on at least one of the Uu DRX configuration information and the bypass DRX configuration information.

[0031] In embodiments of this disclosure, the method of operating the first UE may further include receiving bypass DRX configuration information from the BS. The bypass DRX configuration information may be determined based on bypass DRX preference information.

[0032] In embodiments of this disclosure, the method for the first UE to operate may further include determining bypass DRX configuration information based on Uu DRX configuration information.

[0033] In embodiments of this disclosure, the bypass DRX preference information may include information indicating whether the bypass DRX configuration information corresponds to the UuDRX configuration information, and when the first UE requests a correspondence between the bypass DRX configuration information and the Uu DRX configuration information, the bypass DRX preference information may be configured to have a value corresponding to the Uu DRX operation parameters.

[0034] In embodiments of this disclosure, bypass DRX preference information can be configured by a second UE.

[0035] According to embodiments of this disclosure, a method for BS operation in a wireless communication system can be provided. The BS operation method may include receiving bypass DRX preference information from a first UE, determining Uu DRX configuration information based on the bypass DRX preference information, and sending the Uu DRX configuration information to the first UE.

[0036] In embodiments of this disclosure, the BS operation method may further include sending bypass DRX configuration information to a first UE. The bypass DRX configuration information may be determined based on bypass DRX preference information.

[0037] In embodiments of this disclosure, the bypass DRX configuration information can be determined based on the Uu DRX configuration information.

[0038] In embodiments of this disclosure, the bypass DRX preference information may include information indicating whether the bypass DRX configuration information corresponds to the UuDRX configuration information, and when the first UE requests a correspondence between the bypass DRX configuration information and the Uu DRX configuration information, the bypass DRX preference information may be configured to have a value corresponding to the Uu DRX operation parameters.

[0039] In embodiments of this disclosure, bypass DRX preference information can be configured by a second UE.

[0040] According to embodiments of this disclosure, a first UE operating in a wireless communication system can be provided. The first UE may include a communicator; and a controller that can control the communicator to send bypass DRX preference information to a BS, control the communicator to receive Uu DRX configuration information from the BS based on the bypass DRX preference information, and control the communicator to send data to a second UE based on at least one of the Uu DRX configuration information and the bypass DRX configuration information.

[0041] In embodiments of this disclosure, the controller can receive bypass DRX configuration information from the BS, and the bypass DRX configuration information can be determined based on bypass DRX preference information.

[0042] In embodiments of this disclosure, the controller may determine bypass DRX configuration information based on Uu DRX configuration information.

[0043] In embodiments of this disclosure, the bypass DRX preference information may include information indicating whether the bypass DRX configuration information corresponds to the UuDRX configuration information, and when the first UE requests a correspondence between the bypass DRX configuration information and the Uu DRX configuration information, the bypass DRX preference information may be configured to have a value corresponding to the Uu DRX operation parameters.

[0044] In embodiments of this disclosure, bypass DRX preference information can be configured by a second UE.

[0045] Implementation

[0046] Embodiments of the present disclosure will now be described with reference to the accompanying drawings. Note that in the drawings, the same elements are indicated by the same reference numerals. Detailed descriptions of well-known functions and features, which may obscure the spirit of the present disclosure, will be omitted.

[0047] In the following description, technical details known in the art but not directly related to this disclosure will be omitted. By omitting content that may obscure the subject matter of this disclosure, the subject matter will be understood more clearly.

[0048] For the same reason, some parts in the accompanying drawings are exaggerated, omitted, or shown schematically. The sizes of the individual elements may not perfectly reflect their actual sizes. In all the drawings, the same reference numerals refer to the same elements.

[0049] The advantages and features of this disclosure, as well as the methods of obtaining them, will be more clearly understood by referring to the following embodiments, which will be described subsequently in conjunction with the appendix. Figure 1 The following is a detailed description. However, embodiments of this disclosure may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of embodiments of this disclosure to those skilled in the art.

[0050] It is understood that the individual blocks and combinations of blocks in a flowchart are executed by computer program instructions. These computer program instructions can be loaded onto the processor of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, and thus, when executed by the processor of the computer or other programmable data processing apparatus, they generate means for performing the functions described in the blocks(s) of the flowchart. The computer program instructions can also be stored in a computer-usable or computer-readable storage device for use with a computer or other programmable data processing apparatus, thus allowing the manufacture of an article containing instruction means for performing the functions described in the blocks(s) of the flowchart. The computer program instructions can also be loaded onto a computer or programmable data processing apparatus, and thus the instructions can generate procedures executed by the computer or other programmable data processing apparatus to provide steps for performing the functions described in the blocks(s) of the flowchart.

[0051] Furthermore, each block may represent a module, segment, or portion of code comprising one or more executable instructions to perform a specific logical function. Note that in some alternative embodiments, the functions described in a block may not appear in sequence. For example, two blocks shown consecutively may actually execute substantially simultaneously, or these blocks may sometimes execute in reverse order, depending on the functions involved.

[0052] Furthermore, the terms "unit" or "module" used herein refer to software or hardware components, such as field-programmable gate arrays (FPGAs) or application-specific integrated circuits (ASICs) that perform a certain function. However, modules are not limited to software or hardware. Modules can be configured to be stored in addressable storage media or to execute one or more processors. For example, modules can include components such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, subroutines, program code segments, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided by components and modules can be combined into a smaller number of components and modules, or further divided into a larger number of components and modules. In addition, components and modules can be implemented as one or more central processing units (CPUs) in an execution device or secure multimedia card.

[0053] While the embodiments of this disclosure will focus primarily on the radio access network, new RAN (NR) and core network, and packet core network (5G system, 5G core network, or next-generation (NG) core) in the 5G mobile communication standard specified by the 3rd Generation Partnership Project (3GPP), the subject matter of this disclosure can also be applied to other communication systems with similar technical backgrounds, with minor modifications possible without significantly departing from the scope of this disclosure, as determined by one of ordinary skill in the art to which this disclosure pertains.

[0054] In 5G systems, to support network automation, Network Data Collection and Analysis Functions (NWDAFs) can be defined. These are network functions that provide the ability to analyze and provide data collected by the 5G network. NWDAFs can collect / store / analyze information from the 5G network and provide the results to unspecified network functions (NFs), and the analysis results can be used independently by each NF.

[0055] For ease of explanation, some terms and names defined by the 3GPP LTE standard (a standard for 5G, NR, LTE, or similar systems) will be used below. However, this disclosure is not limited to these terms and definitions and can be applied equally to any system conforming to other standards.

[0056] This disclosure relates to an apparatus and method for a UE to process bypass data transmission or reception in a wireless communication system during discontinuous reception (DRX) mode. Specifically, in this disclosure, the network can configure a DRX group and send it to the UE to support and process bypass data transmission or reception in the UE's DRX mode, and the UE can perform bypass-based data transmission or reception during DRX mode based on the DRX group configuration information.

[0057] According to embodiments of this disclosure, the UE can operate a DRX group to achieve the effect of continuously receiving services via bypass while reducing the UE's battery consumption.

[0058] In the following description, terms relating to signals, channels, control information, network entities, device components, etc., are used for ease of explanation. Therefore, this disclosure is not limited to the terms used herein, and different terms may be used to refer to items that have the same meaning in a technical sense.

[0059] In the following description, physical channels and signals may be used interchangeably with data or control signals. For example, the Physical Downlink Shared Channel (PDSCH) is a term referring to the physical channel on which data is transmitted, but it can also be used to refer to data. In other words, in this specification, the expression "transmitting physical channel" can be interpreted equivalently as "transmitting data or signals on a physical channel".

[0060] Throughout this specification, higher-layer signaling refers to the method of transmitting signals from the BS to the UE on the downlink data channel of the physical layer, or from the UE to the BS on the uplink data channel of the physical layer. Higher-layer signaling can be understood as Radio Resource Control (RRC) signaling or Media Access Control (MAC) control elements (CE).

[0061] In this disclosure, expressions such as "more than or greater than (more than)" or "less than (less than)" are used to determine whether a specific condition (or standard) is met or achieved, but the expressions do not exclude the meaning of "equal to or greater than (more than)" or "equal to or less than (less than)". Conditions written with "equal to or greater than (more than)" can be replaced with "more than", conditions written with "equal to or less than (less than)" can be replaced with "less than (less than)", and conditions written with "equal to or greater than (more than) ~ and "less than (less than) ~" can be replaced with "more than ~ and equal to or less than (less than) ~".

[0062] Furthermore, embodiments of this disclosure may be described using terminology found in some communication standards (e.g., the 3rd Generation Partnership Project (3GPP)), but these terms are merely examples for explanation. Embodiments of this disclosure can also be applied to other communication systems with simple modifications.

[0063] According to embodiments of this disclosure, a method for supporting bypass-based data transmission or reception of a UE in a wireless communication system may include: organizing a secondary DRX group consisting of one or more serving cells, the serving cells controlling and supporting bypass-based data transmission or reception; controlling and supporting bypass data transmission or reception through serving cells belonging to the secondary DRX group; and performing DRX operations for serving cells belonging to the primary DRX group (a DRX group organized separately from the secondary DRX group).

[0064] Figure 1 A wireless communication system according to an embodiment of the present disclosure is shown.

[0065] exist Figure 1 In the diagram, BS110, UE 120, and UE 130 are shown as certain nodes using wireless channels in a wireless communication system. Although in Figure 1 It may contain one BS, but may also include another BS that is the same as or similar to BS 110.

[0066] BS 110 is the network infrastructure that provides radio access for UEs 120 and 130. BS 110 coverage is defined as a geographical area based on the range from which signals are transmitted from the BS 110. BS 110 may also be referred to as an Access Point (AP), eNodeB (eNB), 5G node, next-generation node B (gNB), radio point, transmit / receive point (TRP), or other terms with the same technical meaning.

[0067] Each of the first UE 120 and the second UE 130 is a user-used device that can communicate with the BS 110 via a radio channel. A link from the BS 110 to either the first UE 120 or the second UE 130 may be referred to as a downlink (DL), and a link from either the first UE 120 or the second UE 130 to the BS 110 may be referred to as an uplink (UL). Furthermore, the first UE 120 and the second UE 130 can communicate with each other on the radio channel. In this case, the link between the first UE 120 and the second UE 130 may be referred to as a bypass, and may be called a PC5 interface. In some cases, at least one of the first UE 120 and the second UE 130 can operate without user intervention. For example, at least one of the first UE 120 and the second UE 130 is a device for performing machine-type communication (MTC), which may not be carried by the user. Each of the first UE 120 and the second UE 130 may also be referred to as a terminal, mobile station (MS), subscriber station, remote terminal, wireless terminal, or user equipment, or other terms with the same technical meaning.

[0068] BS 110, the first UE 120, and the second UE 130 can transmit and receive radio signals in millimeter-wave (mmWave) bands (e.g., 28 GHz, 30 GHz, 38 GHz, or 60 GHz). In this case, to increase channel gain, BS 110, the first UE 120, and the second UE 130 can perform beamforming. Hereinafter, beamforming can include transmit beamforming and receive beamforming. That is, BS 110, the first UE 120, and the second UE 130 can assign directionality to the signals to be transmitted or received. To this end, BS 110 and UEs 120 and 130 can select serving beams 112, 113, 121, and 131 through a beam search or beam management process. Communication after serving beams 112, 113, 121, and 131 are selected can be performed using resources of the quasi-co-located resources (QCL) with which the serving beams 112, 113, 121, and 131 have been transmitted.

[0069] When the large-scale characteristics of a channel that has already transmitted symbols on the first antenna port can be inferred from the characteristics of a channel that has already transmitted symbols on the second antenna port, the first and second antenna ports can be estimated to be QCLed. For example, large-scale characteristics may include at least one of delay spread, Doppler spread, Doppler shift, average gain, average delay, and spatial receiver parameters.

[0070] Figure 1 The first UE 120 and the second UE 130 shown can support vehicle communication. For vehicle communication, standardization of Vehicle-to-Everything (V2X) technology in LTE systems based on device-to-device (D2D) communication architectures has been completed in 3GPP Releases 14 and 15, and efforts are currently underway to develop V2X technology based on 5G NR. NR V2X is expected to support UE-to-UE unicast communication, multicast (or multicast) communication, and broadcast communication. Furthermore, NR V2X aims to provide more advanced services such as platooning, advanced driver assistance, extended sensors, and remote driving, which differs from LTE V2X, which is designed to send or receive basic safety information required for driving vehicles on the road.

[0071] V2X services can be categorized into basic safety services and advanced services. Basic safety services may include vehicle notification (Cooperative Awareness Messages (CAM) or Basic Safety Messages (BSM)) services and detailed services such as left-turn notification, forward collision warning, emergency vehicle entry notification, forward obstacle warning, and intersection traffic signal information services, and send or receive V2X information using broadcast, unicast, or multicast transmission methods. Compared to basic safety services, advanced services not only have enhanced Quality of Service (QoS) requirements but also require a scheme for sending or receiving V2X information using unicast and multicast transmission methods other than broadcast, to send or receive V2X information within a specific group of vehicles or between two vehicles. Advanced services may include detailed services such as queuing services, autonomous driving services, remote driving services, and extended sensor-based V2X services.

[0072] In the following text, bypass (SL) refers to the signal transmission or reception path between UEs and can be used interchangeably with the PC5 interface. A base station (BS) is the entity that performs resource allocation for the UE and can be a BS supporting both vehicle-to-everything (V2X) communication and public cellular communication, or a BS supporting only V2X communication. That is, a BS can refer to an NR BS (e.g., gNB), an LTE BS (e.g., eNB), or a roadside unit (RSU). A UE or terminal can include not only general user equipment or mobile stations, but also vehicles supporting vehicle-to-vehicle (V2V) communication, vehicles supporting vehicle-to-pedestrian (V2P) communication or pedestrian headsets (e.g., smartphones), vehicles supporting vehicle-to-network (V2N) communication, vehicles supporting vehicle-to-infrastructure (V2I) communication, RSUs equipped with UE functions, RSUs equipped with BS functions, RSUs equipped with some BS functions and some UE functions, etc. Furthermore, the V2X UE used in the following description can also be referred to as a UE. In other words, in conjunction with V2X communication, a UE can be used as a V2X UE.

[0073] The BS and UE are connected via the Uu interface. UL refers to the radio link through which the UE sends data or control signals to the BS, and DL refers to the radio link through which the BS sends data or control signals to the UE.

[0074] Figure 2 This is a block diagram of a BS in a wireless communication system according to an embodiment of the present disclosure. Figure 2 The block diagram shown can be understood as a configuration of BS 110. Each of the terms "unit," "module," "block," etc., used herein represents a unit for processing at least one function or operation, and can be implemented in hardware, software, or a combination thereof.

[0075] Reference Figure 2 BS 110 includes a wireless communication device 210, a backhaul communication device 220, a storage device 230, and a controller 240. BS 110 may include... Figure 2 Showing more components, or may include only Figure 2 Some of the components shown.

[0076] The wireless communication device 210 performs the function of transmitting or receiving signals on a wireless channel. For example, the wireless communication device 210 performs the conversion function between baseband signals and bit streams according to the physical layer standard of the system. For example, for data transmission, the wireless communication device 210 can generate complex symbols by encoding and modulating the bit stream used for transmission. For data reception, the wireless communication device 210 reconstructs the received bit stream by demodulating and decoding the baseband signals.

[0077] Furthermore, the wireless communication device 210 up-converts the baseband signal to a radio frequency (RF) band signal and transmits the resulting signal through an antenna, and down-converts the RF band signal received through the antenna back to a baseband signal. For this purpose, the wireless communication device 210 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), etc. The wireless communication device 210 may also include multiple transmit or receive paths. Additionally, the wireless communication device 210 may include at least one antenna array composed of multiple antenna elements.

[0078] From a hardware perspective, the wireless communication device 210 may include digital and analog units, and the analog unit may include multiple sub-units depending on the operating power, operating frequency, etc. The digital unit may be implemented using at least one processor (e.g., a digital signal processor (DSP)).

[0079] Wireless communication device 210 transmits and receives signals as described above. All or part of wireless communication device 210 may be referred to as a transmitter, receiver, or transceiver. In the following description, transmission or reception performed via a wireless channel is used to mean that the aforementioned processing is performed by wireless communication device 210.

[0080] Backhaul communicator 220 provides an interface for communicating with other nodes in the network. Specifically, backhaul communicator 220 converts bit streams to be sent from BS 110 to another node, such as another access node, another BS, a higher node, the core network, etc., into physical signals, and converts physical signals received from another node into bit streams.

[0081] Storage 230 stores basic programs, application programs, and data such as configuration information used for the operation of BS 110. Storage 230 may include volatile memory, non-volatile memory, or a combination of volatile and non-volatile memory. Storage 230 may provide data stored therein upon request from controller 240.

[0082] Controller 240 can control the general operation of BS 110. For example, controller 240 can send and receive signals via wireless communication device 210 or backhaul communication device 220. Controller 240 can also record data to or read data from storage device 230. Controller 240 can also perform the functions of the protocol stack required by the communication standard. In another implementation, the protocol stack can be included in wireless communication device 210. For this purpose, controller 240 may include at least one processor. In various embodiments, controller 240 can control the operation of BS 110 according to various embodiments, which will be described below.

[0083] Figure 3 The configuration of a UE in a wireless communication system according to various embodiments of the present disclosure is shown.

[0084] Figure 3 The configuration shown can be understood as the configuration of UE 120. Each of the terms "unit", "module", "block", etc. used herein represents a unit for processing at least one function or operation, and can be implemented in hardware, software, or a combination thereof.

[0085] Reference Figure 3 UE 120 includes a communicator 310, a storage unit 320, and a controller 330. UE 120 may include a... Figure 3 Showing more components, or may include only Figure 3 Some of the components shown.

[0086] The communicator 310 performs the functions of transmitting and receiving signals on a wireless channel. For example, the communicator 310 performs conversion between baseband signals and bitstreams according to the system's physical layer standard. For example, for data transmission, the communicator 310 can generate complex symbols by encoding and modulating the bitstream used for transmission. For data reception, the communicator 310 reconstructs the received bitstream by demodulating and decoding the baseband signals. Furthermore, the communicator 310 performs up-conversion of the baseband signals to radio frequency (RF) band signals and transmits the resulting signals through an antenna, and can also perform down-conversion of the RF band signals received through the antenna to baseband signals. For example, the communicator 310 may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a digital-to-analog converter (DAC), an analog-to-digital converter (ADC), etc.

[0087] The communicator 310 may also include multiple transmit and receive paths. Furthermore, the communicator 310 may include at least one antenna array consisting of multiple antenna elements. From a hardware perspective, the communicator 310 may include digital and analog circuitry (e.g., a radio frequency integrated circuit (RFIC)). In this case, the digital and analog circuitry can be implemented in a single package. The communicator 310 may include multiple RF chains. Additionally, the communicator 310 may perform beamforming.

[0088] The communicator 310 transmits and receives signals as described above. All or part of the communicator 310 may be referred to as a transmitter, receiver, or transceiver. In the following description, transmission or reception performed via a wireless channel is used to mean that the aforementioned processing is performed by the communicator 310.

[0089] Storage 320 stores basic programs, application programs, and data such as configuration information used for the operation of UE 120. Storage 320 may include volatile memory, non-volatile memory, or a combination of volatile memory and non-volatile memory. Storage 320 may provide the data stored therein upon request from controller 330.

[0090] Controller 330 controls the general operation of UE 120. For example, controller 330 sends and receives signals via communicator 310. Controller 330 can also record data to or read data from storage 320. Controller 330 can also perform the functions of the protocol stack required by the communication standard. For this purpose, controller 330 may include at least one processor or microprocessor, or may be part of a processor. Furthermore, communicator 310 and part of controller 330 may be referred to as a communication processor (CP). According to an embodiment, controller 330 can control UE 120 to operate according to an embodiment described later.

[0091] Figure 4 This is a block diagram of a communicator in a wireless communication system according to an embodiment of the present disclosure.

[0092] exist Figure 4 In, it is shown Figure 2 Wireless communication device 210 or Figure 3 An example of the detailed configuration of the communicator 310. Specifically, Figure 4 The diagram shows components used to perform beamforming; these components are Figure 2 Wireless communication device 210 or Figure 3 It is part of the communicator 310.

[0093] refer to Figure 4The wireless communication device 210 or the communication device 310 may include an encoder and modulator 402, a digital beamformer 404, multiple transmission paths 406-1 to 406-N and an analog beamformer 408.

[0094] The encoder and modulator 402 can perform channel coding. For channel coding, at least one of low-density parity-check (LDPC) codes, convolutional codes, and polar codes can be used. The encoder and modulator 402 can generate modulated symbols by performing constellation mapping.

[0095] Digital beamformer 404 performs beamforming on a digital signal (e.g., modulated symbols). To do this, digital beamformer 404 multiplies the modulated symbols by beamforming weights. Beamforming weights can be used to change the amplitude and phase of the signal and are referred to as precoding matrices, precoders, etc. Digital beamformer 404 can output digitally beamformed modulated symbols on multiple transmission paths 406-1 to 406-N. In this case, according to a multiple-input multiple-output (MIMO) transmission scheme, the modulated symbols can be multiplexed, or the same modulated symbols can be provided on multiple transmission paths 406-1 to 406-N.

[0096] Multiple transmission paths 406-1 to 406-N can convert digital beamforming signals into analog signals. To this end, each transmission path 406-1 to 406-N can individually include an Inverse Fast Fourier Transform (IFFT) operator, a Cyclic Prefix (CP) inserter, a DAC, and an upconverter. The CP inserter is used in OFDM schemes and can be omitted when applying different physical layer schemes (e.g., Filter Bank Multicarrier (FBMC) schemes). In other words, the multiple transmission paths 406-1 to 406-N provide independent signal processing for multiple streams generated by digital beamforming. However, depending on the implementation method, some components of the multiple transmission paths 406-1 to 406-N can be shared.

[0097] Analog beamformer 408 can perform beamforming on analog signals. To do this, digital beamformer 404 multiplies the analog signal by beamforming weights. These beamforming weights can be used to change the amplitude and phase of the signal. Specifically, the analog beamformer 408 can be configured differently depending on the coupling structure between the multiple transmission paths 406-1 to 406-N and the antennas. For example, each of the multiple transmission paths 406-1 to 406-N can be connected to an antenna array. In another example, the multiple transmission paths 406-1 to 406-N can be adaptively connected to one, two, or more antenna arrays.

[0098] Figure 5The structure of radio time-frequency resources in a wireless communication system according to an embodiment of the present disclosure is shown.

[0099] refer to Figure 5 In the radio resource domain, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. The smallest transmission unit in the time domain is an Orthogonal Frequency Division Multiplexing (OFDM) symbol or a Discrete Fourier Transform Spread Spectrum OFDM (DFT-S-OFDM) symbol, and N symb One OFDM symbol or DFT-S-OFDM symbol 530 is included in one time slot 505. Unlike time slots, in NR systems, subframes can be defined as 1.0 ms long, and radio frames 500 can be defined as 10 ms long. The smallest transmission unit in the frequency domain is a subcarrier, and the bandwidth of the entire system transmission band can include a total of N BW 525 subcarriers. N symb N BW The specific values ​​can be applied depending on the system.

[0100] The basic unit in the time-frequency resource domain is the resource element (RE) 510, which can be represented by an OFDM symbol index or a DFT-S-OFDM symbol index and subcarrier index. The resource block (RB) 515 can be represented by N in the frequency domain. RB The system is defined by 520 consecutive subcarriers. The common minimum transmission unit for data is the RB unit, and in NR systems, typically N... symb =14, N RB =12.

[0101] Figure 5 The structure of the radio time-frequency resources shown is applied to the Uu interface. Furthermore, Figure 5 The radio time-frequency resource structure in the code can be similarly applied to bypass.

[0102] Figure 6a A bypass communication scenario according to an embodiment of the present disclosure is illustrated.

[0103] Figure 6a This illustrates an in-coverage scenario when bypass UEs 620a and 620b are within the coverage of BS 610. Bypass UEs 620a and 620b can receive data and control information from BS 610 in the downlink (DL) or send data and control information to BS in the uplink (UL). In this case, the data and control information can be for bypass communication or for normal cellular communication instead of bypass communication. Furthermore, in Figure 6a In this context, bypass UEs 620a and 620b can send or receive data and control information for bypass communication via bypass (SL).

[0104] Figure 6b An SL communication scenario according to an embodiment of the present disclosure is illustrated.

[0105] Reference Figure 6b The diagram illustrates a partial coverage scenario where a first UE 620a is within the coverage of BS 610, while a second UE 620b is outside the coverage of BS 610. The first UE 620a, within the coverage of BS 610, can receive data and control information from the BS in the DL (Directional Link) or send data and control information to the BS in the UL (Upper Module). The second UE 620b, outside the coverage of BS 610, can receive data and control information from the BS without using the DL, and can also send data and control information to the BS without using the UL. The second UE 620b can send or receive data and control information for SL (Self-Signal Communication) communication in the SL (Self-Signal Communication) to or from the first UE 620a.

[0106] Figure 6c An SL communication scenario according to an embodiment of the present disclosure is illustrated.

[0107] refer to Figure 6c This illustrates that the SL UE (e.g., first UE 620a and second UE 620b) is located outside the coverage of the BS. Therefore, first UE 620a and second UE 620b may not receive data and control information from the BS in the DL, nor may they send data and control information to the BS in the UL. First UE 620a and second UE 620b may send or receive data and control information for SL communication in the SL.

[0108] Figure 6d An SL communication scenario according to an embodiment of the present disclosure is illustrated.

[0109] Reference Figure 6dThe first UE 620a and the second UE 620b performing bypass communication can perform inter-cell (SL) communication while connected to different BSs (e.g., the first BS 610a and the second BS 610b), for example, in an RRC connected state, or in a camped state (e.g., in an RRC disconnected state, i.e., an RRC idle state). In this case, the first UE 620a can be an SL transmitting UE, and the second UE 620b can be an SL receiving UE. Alternatively, the first UE 620a can be an SL receiving UE, and the second UE 620b can be an SL transmitting UE. The first UE 620a can receive SL-specific System Information Blocks (SIBs) from the BS 610a to which the first UE 620a is connected (or on which the first UE 620a camps), and the second UE 620b can receive SL-specific SIBs from another BS 620b to which the second UE 620a is connected (or on which the second UE 620a camps). In this scenario, the SL-specific SIB information received by the first UE 620a and the SL-specific SIB information received by the second UE 620b can be different from each other. Therefore, unified information is required to perform SL communication between UEs located in different cells.

[0110] In the above Figures 6a to 6d In the examples provided, although an SL system with two UEs (e.g., the first UE 610a and the second UE 620b) is described as an example for ease of explanation, this disclosure is not limited thereto and can be equivalently applied to SL systems involving two or more UEs. The UL and DL between BS 610 (610a and 610b) and SL UEs 620a and 620b may be referred to as Uu interfaces, while the SL between SL UEs may be referred to as PC-5 interfaces. In the following description, UL or DL ​​and Uu interfaces, or bypass and PC-5, may be used interchangeably.

[0111] In this disclosure, UE can refer to a vehicle supporting vehicle-to-vehicle (V2V) communication, a vehicle supporting vehicle-to-pedestrian (V2P) communication, a pedestrian's mobile phone (e.g., a smartphone), a vehicle supporting vehicle-to-network (V2N) communication, or a vehicle supporting vehicle-to-infrastructure (V2I) communication. Furthermore, in this disclosure, UE can refer to a roadside unit (RSU) equipped with UE functionality, an RSU equipped with BS functionality, or an RSU equipped with a portion of BS functionality and a portion of UE functionality.

[0112] Figure 7a and Figure 7b This is a diagram illustrating a transmission method for SL communication according to an embodiment of the present disclosure.

[0113] Specifically, Figure 7a Indicates the unicast method, Figure 7b This indicates the multicast method.

[0114] Reference Figure 7a The transmitting terminal 720a and the receiving terminal 720b can perform one-to-one communication. For example... Figure 7a The transmission method shown can be called unicast communication. (See reference...) Figure 7b One-to-many communication can be performed by sending a UE 720a or 720d and receiving UEs 720b, 720c, 720e, 720f, and 720g. For example... Figure 7b The transmission method shown can be called multicast or multi-cast. Figure 7b In this configuration, the first UE 720a, the second UE 720b, and the third UE 720c form a group and perform multicast communication, while the fourth UE 720d, the fifth UE 720e, the sixth UE 720f, and the seventh UE 720g form another group and perform multicast communication. UEs can perform multicast communication within their respective groups and can also perform unicast, multicast, or broadcast communication with at least one UE belonging to another group. For ease of explanation, in... Figure 7b Two groups are shown, but this disclosure is not limited to this and can be applied to situations where more groups are formed.

[0115] although Figure 7a or Figure 7b Not shown, but SLUEs can perform broadcast communication. Broadcast communication refers to a method in which all SL UEs receive data and control information sent by SL transmitting UEs in the bypass. For example, when the first UE 720a is Figure 7b When the transmitting UE is in the first UE 720a, other UEs 720b, 720c, 720e, 720f and 720g can receive data and control information transmitted by the first UE 720a.

[0116] The aforementioned SL unicast communication, multicast communication and broadcast communication can be supported in scenarios with coverage, partial coverage or out of coverage.

[0117] For NR SL, unlike LTE SL, it is possible to consider transmission formats that support vehicle terminals sending data to a specific UE via unicast and transmission formats that support vehicle terminals sending data to multiple UEs via multicast. For example, when considering service scenarios such as queuing, unicast and multicast technologies can be effectively used. Queuing is a technology that connects two or more vehicles to a network and moves them as groups. Specifically, unicast communication can be used to enable a leader UE in a queuing-based group to control a specific UE, while multicast communication can be used to control a group consisting of many specific UEs simultaneously.

[0118] Resource allocation in a V2X system can be achieved using the following methods:

[0119] (1) Resource allocation mode 1

[0120] The scheduled resource allocation is a method by which the BS allocates resources for SL transmissions to UEs connected to the RRC using a dedicated scheduling method. By allowing the BS to manage SL resources, the scheduled resource allocation method can be effective in interference management and resource pool management (dynamic allocation and / or semi-persistent transmission). When data needs to be sent to other UEs, the UE connected to the RRC can send information to the BS in an RRC message or a Media Access Control (MAC) control element (hereinafter referred to as CE) indicating that data needs to be sent to other UEs. For example, the RRC message sent by the UE to the BS can correspond to an SL UE Information (SidelinkUEInformation) or UE assistance information message, and the MAC CE can correspond to a Buffer Status Report (BSR) MAC CE, a Scheduling Request (SR), etc., including at least one of an indicator indicating that it is a Buffer Status Report (BSR) for V2X communication and information about the size of the buffered data used for SL communication.

[0121] (2) Resource allocation mode 2

[0122] Secondly, UE autonomous resource selection is a method in which the UE is provided with SL transmit or receive resource pools for V2X in system information or RRC messages (e.g., RRC reconfiguration messages or PC5-RRC messages), and the UE selects the resource pool and resources according to set rules. UE autonomous resource selection can correspond to one or more of the following resource allocation methods:

[0123] The UE autonomously selects the SL resources used for transmission.

[0124] >UE assists other UEs in selecting SL resources.

[0125] The UE is configured with NR permission for SL transport.

[0126] >UE schedules SL transmissions for other UEs.

[0127] UE resource selection methods may include area mapping, sensing-based resource selection, random selection, etc.

[0128] - In addition, even when the UE is within the coverage of the BS, resource allocation or resource selection based on scheduling resource allocation or UE autonomous resource selection mode may not be performed. In this case, the UE can use the pre-configured SL transmit or receive resource pool (or pre-configured resource pool) to perform V2X SL communication.

[0129] - In addition, when the UE used for V2X communication is outside the coverage of the BS, the UE can use a pre-configured SL transmit or receive resource pool to perform V2X SL communication.

[0130] In this disclosure, the presence of a primary DRX group and a secondary DRX group is described as an example of DRX groups, but this disclosure certainly applies equally to situations where there is more than one primary DRX group or secondary DRX group.

[0131] In this disclosure, the UE described below may be a first UE 620a or a second UE 620b.

[0132] Figure 8 This is a diagram illustrating the operation of network processing of UE DRX configuration according to an embodiment of the present disclosure.

[0133] In embodiments of this disclosure, the network may refer to a BS.

[0134] Reference Figure 8 In operation 800, the network can obtain and determine the UE's radio capability information. The UE's radio capability information may include at least one or a combination of SL support, UL support, DRX support, DRX group support, primary DRX group support, and secondary DRX group support. In operation 802, the network can configure the DRX for the RRC connection mode to be delivered to the UE. The DRX configuration may include at least one or a combination of those listed in Table 1 below.

[0135] [Table 1]

[0136]

[0137]

[0138]

[0139] The network can operate one or more DRX groups to support the UE's Uu DRX. The network can also operate one or more DRX groups to support SL scheduling in the UE's Uu DRX. A DRX group can include zero or more serving cells. Serving cells belonging to a DRX group can support the UE's Uu DRX or support SL scheduling in the UE's Uu DRX.

[0140] In addition to DRX groups that support Uu DRX, the network can form DRX groups that include serving cells that support SL scheduling. Specifically, information about the DRX groups configured by the network for the UE may include at least one of the following: serving cell list configuration for operating Uu DRX, serving cell list configuration for not operating Uu DRX to support SL scheduling mode 1, and serving cell list configuration for operating Uu DRX to support SL scheduling mode 1.

[0141] The network can configure information about DRX groups that operate Uu DRX and information about DRX groups that support SL scheduling mode 1 but do not operate Uu DRX mode, or information about Uu DRX groups that support SL scheduling mode 1, to explicitly indicate to the UE.

[0142] For example, the network can configure information about DRX groups that operate Uu DRX to indicate to the UE. In this case, the UE can determine that other group information that is not configured is about DRX groups that support SL scheduling mode 1 but do not operate Uu DRX.

[0143] For example, the network can configure information about DRX groups operating Uu DRX to indicate to the UE. In this case, the UE can determine that other group information that is not configured is about DRX groups that support SL scheduling mode 1 and operate Uu DRX.

[0144] For example, the network can configure information about DRX groups that support SL scheduling mode 1 but do not operate Uu DRX to indicate to the UE. In this case, the UE can determine that other group information that is not configured is about DRX groups that operate Uu DRX.

[0145] For example, the network can configure information about the DRX groups that operate Uu DRX when supporting SL scheduling mode 1 to indicate to the UE. In this case, the UE can determine that other group information that is not configured is about the DRX groups that operate UuDRX when supporting SL scheduling mode 1.

[0146] For example, the network can configure information about the DRX groups that operate Uu DRX when supporting SL scheduling mode 1 to indicate this to the UE. In this case, the UE can determine that other group information that is not configured is about the DRX groups that operate Uu DRX.

[0147] For example, the network can configure information about DRX groups that operate Uu DRX when supporting SL scheduling mode 1 to indicate to the UE. In this case, the UE can determine that other group information that is not configured pertains to DRX groups that support SL scheduling mode 1 but do not operate UuDRX. For example, for DRX groups that support SL scheduling mode 1, the network can configure DRX operation parameters to support the UE's SL scheduling mode 1.

[0148] When the network determines that it supports SL scheduling mode 1 in both the primary and secondary DRX groups, the operational parameters used to support SL scheduling mode 1 can be configured to have the same value in both the primary and secondary DRX groups. For example, at least one operational parameter of drx-RetransmissionTimerSL or drx-HARQ-RTT-TimerSL can be configured to have the same value.

[0149] Optionally, the network can be configured with operating parameters to support SL scheduling mode 1, thereby having different values ​​in the primary and secondary DRX groups. For example, at least one operating parameter of drx-RetransmissionTimerSL or drx-HARQ-RTT-TimerSL can be configured to have a different value for each DRX group.

[0150] In Operation 804, the network can send the DRX configuration information for the RRC connection mode of Operation 802. The UE can determine whether the serving cell belongs to the primary DRX group or the secondary DRX group based on the configuration information in Operation 804, and determine the operation parameter information for each DRX group.

[0151] Next, refer to Figure 9a , Figure 9b , Figure 9c , Figure 9d , Figure 10a and Figure 10b This will describe various embodiments of how the UE processes DRX configuration when sending or receiving SL-based data.

[0152] When a UE operates a Uu DRX group and is configured with SL scheduling mode 1 (the mode in which the BS schedules SL transmission resources), the UE can operate Uu DRX through a specific Uu DRX group and support SL scheduling mode 1 through that Uu DRX group. In this case, the DRXs of the Uu DRX groups supporting SL scheduling can be deactivated. When the UE is configured with SL scheduling mode 2 by the UE, the deactivated UuDRX groups can be reactivated to operate Uu DRX.

[0153] Figure 9a This is a diagram illustrating the operation of a UE processing DRX configuration according to an embodiment of the present disclosure.

[0154] Reference Figure 9aIn operation 900, the UE can obtain one or more DRX groups from the network. In operation 902, the UE can determine whether it is configured with SL scheduling mode 1 (BS scheduling mode). When it is determined in operation 902 that SL scheduling mode 1 is configured, in operation 904, the UE can determine that the Uu DRX of the secondary DRX group in the DRX group obtained from the network is deactivated. In other words, the UE can determine that the Uu DRX does not operate with the serving cell belonging to the secondary DRX group. When SL scheduling mode 1 is not configured, the Uu DRX can be restored (activated) through the secondary DRX group. In operation 906, the UE can support SL scheduling mode 1 through the serving cell belonging to the secondary DRX group. In operation 908, the UE can operate the UuDRX through the serving cell belonging to the primary DRX group. When it is determined in operation 902 that SL scheduling mode 1 is not configured, in operation 910, the UE can operate the Uu DRX through the DRX group configured in operation 900.

[0155] Figure 9b This is a diagram illustrating the operation of a UE processing DRX configuration according to an embodiment of this disclosure.

[0156] Reference Figure 9b In operation 920, the UE can obtain the primary DRX group from the network. In operation 922, the UE can determine whether it is configured with SL scheduling mode 1 (BS scheduling mode). If it is determined in operation 922 that SL scheduling mode 1 is configured, in operation 924, the UE can obtain the secondary DRX group from the network. In operation 926, the UE can determine that the Uu DRX is deactivated through the primary DRX group. In other words, the UE can determine that the Uu DRX does not operate with the serving cell belonging to the primary DRX group. When SL scheduling mode 1 is not configured, the Uu DRX can be restored (activated) through the primary DRX group. In operation 928, the UE can support SL scheduling mode 1 through the serving cell belonging to the primary DRX group. In operation 930, the UE can operate the Uu DRX through the serving cell belonging to the secondary DRX group. When it is determined in operation 922 that SL scheduling mode 1 is not configured, in operation 932, the UE can operate the Uu DRX through the DRX group configured in operation 920.

[0157] Figure 9c This is a diagram illustrating the operation of a UE processing DRX configuration according to an embodiment of this disclosure.

[0158] Reference Figure 9cIn operation 940, the UE can obtain one or more DRX groups from the network. In operation 942, the UE can determine whether the network has configured the deactivation of secondary DRX groups. When it is determined in operation 942 that the deactivation of secondary DRX groups has been configured, in operation 944, the UE can determine that the Uu DRX is deactivated through the secondary DRX group. In other words, the UE can determine that the Uu DRX does not operate with the serving cell belonging to the secondary DRX group. When SL scheduling mode 1 is not configured, or when the network configures the activation of secondary DRX groups, the Uu DRX can be restored (activated) through the secondary DRX group. In operation 946, the UE can support SL scheduling mode 1 through the serving cell belonging to the secondary DRX group. In operation 948, the UE can operate UuDRX through the serving cell belonging to the primary DRX group. When it is determined in operation 942 that the network has not configured the deactivation of secondary DRX groups, in operation 950, the UE can operate Uu DRX through the DRX group configured in operation 940.

[0159] Despite Figure 9c The embodiments described involve deactivating the secondary DRX group, but the network can certainly deactivate the primary DRX group, supporting SL scheduling mode 1 through the primary DRX group, and configuring the Uu DRX to be operated by the secondary DRX group. In this case, the network can instruct the UE to deactivate the primary DRX group configuration information. When the network determines to reactivate the primary DRX group, the network can instruct the UE to activate the primary DRX configuration information.

[0160] exist Figure 9c In some embodiments, examples of the network instructing the UE on the configuration information for deactivating or activating the DRX group may include a combination of at least one or more of the information in Table 2 below.

[0161] [Table 2]

[0162]

[0163] Figure 9d This is a diagram illustrating the operation of a UE processing DRX configuration according to an embodiment of the present disclosure.

[0164] Reference Figure 9d In operation 960, the UE can obtain one or more DRX groups from the network. In operation 962, the UE can determine whether it is configured with SL scheduling mode 1 (BS scheduling mode).

[0165] In operation 964, the UE can select or identify a DRX group to operate DRX. When it is determined in operation 962 that SL scheduling mode 1 is configured, in operation 964, the UE can determine the serving cell configured not to monitor the physical downlink control channel (PDCCH) corresponding to the SL identifier (e.g., SL cell radio network temporary identifier (SL-RNTI) or SL configured scheduling RNTI (SLCS-RNTI)), i.e., the serving cell configured not to monitor SL transmission scheduling in the search space of the serving cell. Furthermore, the UE can determine DRX groups including serving cells configured not to monitor SL transmission scheduling and DRX groups excluding the corresponding serving cells. The UE can determine that Uu DRX through DRX groups excluding the corresponding serving cells is deactivated. Furthermore, the UE can determine that it can support SL scheduling through DRX groups excluding the corresponding serving cells. Through this determination, the UE can select a DRX group including serving cells configured not to monitor SL transmission scheduling as the DRX group for DRX operation.

[0166] For example, when the DRX group to which the serving cell configured not to monitor SL transport scheduling belongs is determined to be the primary DRX group, the UE can determine that the Uu DRX will not operate with serving cells belonging to the secondary DRX group. When SL scheduling mode 1 is not configured, Uu DRX can be restored (activated) through the secondary DRX group. The UE can support SL scheduling through serving cells belonging to the secondary DRX group (i.e., DRX groups not selected for DRX operation) and operate Uu DRX through serving cells belonging to the primary DRX group (i.e., DRX groups selected for DRX operation).

[0167] For example, when the DRX group to which the serving cell configured not to monitor SL transport scheduling belongs is determined to be a secondary DRX group, the UE can determine that Uu DRX will not operate with serving cells belonging to the primary DRX group. When SL scheduling mode 1 is not configured, Uu DRX can be restored (activated) through the primary DRX group. The UE can support SL scheduling through serving cells belonging to the primary DRX group (i.e., DRX groups not selected for DRX operation) and operate Uu DRX through serving cells belonging to the secondary DRX group (i.e., DRX groups selected for DRX operation).

[0168] In operation 966, the UE can support SL scheduling mode 1 through a serving cell belonging to a DRX group that was not selected for DRX operation in operation 964. In operation 968, the UE can operate Uu DRX through a serving cell belonging to a DRX group that was selected for DRX operation in operation 964. When it is determined in operation 962 that SL scheduling mode 1 is not configured, in operation 970, the UE can operate Uu DRX through the DRX group configured in operation 960.

[0169] Figure 9e This is a diagram illustrating the operation of a UE processing DRX configuration according to an embodiment of the present disclosure.

[0170] Reference Figure 9e In operation 980, the UE can obtain one or more DRX groups from the network. In operation 982, the UE can determine whether it is configured with SL scheduling mode 1 (BS scheduling mode).

[0171] In operation 984, the UE can select or identify DRX groups that support SL scheduling. When it is determined in operation 982 that SL scheduling mode 1 is configured, in operation 984, the UE can determine the serving cell configured to monitor the PDCCH (e.g., SL-RNTI or SLCS-RNTI) corresponding to the SL identifier, i.e., the serving cell configured to monitor SL transmission scheduling in the search area of ​​the serving cell. Furthermore, the UE can determine DRX groups that include the serving cells configured to monitor SL transmission scheduling and DRX groups that do not include the corresponding serving cells. The UE can determine that the Uu DRX through the DRX group including the corresponding serving cell is deactivated. Furthermore, the UE can determine that it can support SL scheduling through the DRX group including the corresponding serving cell. Through this determination, the UE can select the DRX group including the serving cells configured to monitor SL transmission scheduling as the DRX group supporting SL scheduling.

[0172] For example, when the DRX group to which the serving cell configured to monitor SL transmission scheduling belongs is determined to be the primary DRX group, the UE can determine that Uu DRX will not operate with serving cells belonging to the primary DRX group. When SL scheduling mode 1 is not configured, Uu DRX can be restored (activated) through the primary DRX group. The UE can support SL scheduling through serving cells belonging to the primary DRX group (i.e., the DRX group selected to support SL scheduling) and operate Uu DRX through serving cells belonging to the secondary DRX group (i.e., the DRX group not selected to support SL scheduling).

[0173] For example, when the DRX group to which the serving cell configured to monitor SL transmission scheduling belongs is determined to be a secondary DRX group, the UE can determine that Uu DRX will not operate with serving cells belonging to the secondary DRX group. When SL scheduling mode 1 is not configured, Uu DRX can be restored (activated) through the secondary DRX group. The UE can support SL scheduling through serving cells belonging to the secondary DRX group (i.e., the DRX group selected to support SL scheduling) and operate Uu DRX through serving cells belonging to the primary DRX group (i.e., the DRX group not selected to support SL scheduling).

[0174] In operation 986, the UE can support SL scheduling mode 1 through a serving cell belonging to a DRX group selected in operation 984 to support SL scheduling. In operation 988, the UE can operate Uu DRX through a serving cell belonging to a DRX group not selected in operation 984 to support bypass scheduling. When it is determined in operation 982 that SL scheduling mode 1 is not configured, in operation 990, the UE can operate Uu DRX through the DRX group configured in operation 980.

[0175] exist Figures 9a to 9e In the embodiments described, a case is depicted where the UE can operate a Uu DRX through a certain Uu DRX group and operate SL scheduling mode 1 through a certain Uu DRX group. Next, refer to... Figure 10a The following will now describe the scenario where Uu DRX and SL scheduling mode 1 are supported by all Uu DRX groups configured for the UE.

[0176] Figure 10a This is a diagram illustrating the operation of a UE processing DRX configuration according to an embodiment of this disclosure.

[0177] Reference Figure 10a In operation 1000, the UE can obtain one or more DRX groups from the network. In operation 1002, the UE can determine whether it is configured with SL scheduling mode 1 (BS scheduling mode). When it is determined in operation 1002 that SL scheduling mode 1 is configured, the UE can determine to operate in SL scheduling mode 1 among the DRX groups obtained from the network in operation 1004.

[0178] In one embodiment, the operation parameters of the DRX groups obtained from the network can be applied to one or more DRX groups with the same value to operate SL scheduling mode 1. In another embodiment, different values ​​can be applied to the operation parameters of the DRX groups obtained from the network when operating SL scheduling mode 1. When different values ​​are applied in operating SL scheduling mode 1, the network can send a configuration of the operation parameters for one or more DRX groups corresponding to the UE. The operation parameters can refer to the operation parameters in Table 1, including, for example, drx-RetransmissionTimerSL, drx-HARQ-RTT-TimerSL, etc.

[0179] In operation 1006, the UE can operate Uu DRX and SL scheduling mode 1 through the DRX group obtained from the network. When it is determined in operation 1002 that SL scheduling mode 1 is not configured, in operation 1008, the UE can operate Uu DRX through the DRX group configured in operation 1000.

[0180] Next, refer to Figure 10bThis section describes the scenario where Uu DRX and SL scheduling mode 1 are operated through some Uu DRX groups configured for the UE. Only Uu DRX can operate in other Uu DRX groups.

[0181] Figure 10b This is a diagram illustrating the operation of a UE processing DRX configuration according to an embodiment of this disclosure.

[0182] Reference Figure 10b In operation 1020, the UE can obtain one or more DRX groups from the network. In operation 1022, the UE can determine whether it is configured with SL scheduling mode 1 (BS scheduling mode). When it is determined in operation 1022 that SL scheduling mode 1 is configured, in operation 1024, the UE can obtain information about the DRX groups, in which the operating parameters for operating SL scheduling mode 1 are configured in the DRX groups obtained from the network. The operating parameters for operating SL scheduling mode 1 can be found in Table 1, including, for example, drx-RetransmissionTimerSL, drx-HARQ-RTT-TimerSL, etc.

[0183] In operation 1026, the UE can operate Uu DRX and SL scheduling mode 1 through the DRX group. In operation 1024, the operation parameters for operating SL scheduling mode 1 are configured in the DRX group. In other words, the UE can support SL scheduling mode 1 through a serving cell belonging to the DRX group, and the operation parameters for operating SL scheduling mode 1 are configured in that serving cell.

[0184] In operation 1028, the UE can operate Uu DRX through a serving cell belonging to another Uu DRX group (i.e., a DRX group other than the DRX group, where the operating parameters for operating SL scheduling mode 1 are configured in the DRX group obtained from the network). In other words, the UE may not support SL scheduling mode 1 through a serving cell belonging to another Uu DRX group. When it is determined in operation 1022 that SL scheduling mode 1 is not configured, in operation 1030, the UE can operate Uu DRX through the DRX group configured in operation 1000.

[0185] When performing Uu-based data transmission or reception, the UE can operate the Uu DRX, while when performing SL-based data transmission or reception, the UE can operate the SL DRX. Next, refer to... Figure 11 and Figure 12 A method to minimize UE battery consumption by aligning the monitoring time of Uu DRX with the monitoring time of SL DRX to minimize the time spent performing Uu monitoring and SL monitoring.

[0186] Figure 11This is a diagram illustrating the operation of a UE processing SLDRX and Uu link DRX according to an embodiment of this disclosure.

[0187] Figure 11 This illustrates a method for handling SL DRX configuration when it is not necessary to synchronize the time point of the Uu DRX monitoring with the time point of the SL DRX monitoring. In one embodiment, when the UE is in the RRC_CONNECTED state, the following can be performed: Figure 11 The operation. In another embodiment, when the UE is in the RRC_CONNECTED state and configured with BS scheduling mode (SL scheduling mode 1), the following can be performed. Figure 11 The operation.

[0188] Reference Figure 11 In Operation 1100, when the UE is performing SL-based data transmission or reception and supports SLDRX, the UE can determine whether it needs to indicate SL DRX preference information to the BS. Alternatively, when SL DRX is activated, the UE can determine whether it needs to indicate changed SLDRX preference information to the BS. When sl-drx-PreferenceProhibitTimer is set, the UE does not need to report changed SL DRX preference information to the BS before the timer expires.

[0189] In operation 1102, the UE can configure SLDRX preference information. In other words, in operation 1102, the UE can configure SLDRX operation parameter preference information. In this case, the SLDRX preference information may include DRX operation parameter preference information, which is information about the parameters the UE prefers for operating SLDRX. The SLDRX operation parameter preference information may include at least one or a combination of information from Table 3 below. The UE can configure a UEAssistanceInformation message or a SidelinkUEInformation message that includes the SLDRX operation parameter preference information.

[0190] [Table 3]

[0191]

[0192]

[0193] In operation 1104, the UE may send SL DRX preference information to the BS. For example, in operation 1104, the UE may send a UEAssistanceInformation message or a SidelinkUEInformation message to the BS that includes SL DRX operation parameter preference information.

[0194] When sl-drx-PreferenceProhibitTimer is set, the UE can start the timer (i.e., sl-drx-PreferenceProhibitTimer) and send a message including SL DRX preference information.

[0195] Based on the SL DRX operation parameter preference information reported by the UE, the BS can configure SL DRX operation parameters for the UE.

[0196] Figure 12 This is a diagram illustrating the operation of a UE processing SL DRX and Uu link DRX according to an embodiment of this disclosure.

[0197] Figure 12 A method for processing SL DRX configuration is illustrated, including determining situations where the time point for monitoring Uu DRX needs to be consistent with the time point for monitoring SL DRX. In one embodiment, when the UE is in the RRC_CONNECTED state, the following can be performed: Figure 12 The operation. In another embodiment, when the UE is in the RRC_CONNECTED state and configured with BS scheduling mode (SL scheduling mode 1), the following can be performed. Figure 12 The operation.

[0198] Reference Figure 12 In Operation 1200, when the UE is performing SL-based data transmission or reception and supports SL DRX, the UE can determine whether it needs to indicate SL DRX preference information to the BS. Alternatively, when SL DRX is activated, the UE can determine whether it needs to indicate changed SL DRX preference information to the BS. The UE can determine whether it needs to indicate information about the corresponding preferences between the SL DRX configuration and the Uu DRX configuration to the BS. When sl-drx-PreferenceProhibitTimer is set, the UE does not need to report changed SL DRX preference information to the BS before the timer (i.e., sl-drx-PreferenceProhibitTimer) expires.

[0199] In operation 1202, the UE can determine whether it needs to indicate to the BS information about the corresponding preferences between the SL DRX configuration and the Uu DRX configuration.

[0200] When it is determined in operation 1202 that information indicating corresponding preferences between the SL DRX configuration and the Uu DRX configuration needs to be provided, the UE can configure the SL DRX preference information in operation 1204. In other words, in operation 1204, the UE can configure SL DRX operation parameter preference information. In this case, the SL DRX preference information may include DRX operation parameter preference information, which is information about the parameters preferred by the UE for operating the SL DRX.

[0201] In embodiments of this disclosure, to notify information about the corresponding preferences between the SL DRX configuration and the Uu DRX configuration, the SL DRX operation parameter preference information can be configured to have values ​​corresponding to the Uu DRX operation parameters. The SL DRX operation parameter preference information may include at least one or a combination of information from Table 4 below. The UE can configure a UEAssistanceInformation message or a SidelinkUEInformation message that includes the SL DRX operation parameter preference information.

[0202] [Table 4]

[0203]

[0204] When it is determined in operation 1202 that it is not necessary to report information regarding the corresponding preferences between the SL DRX configuration and the Uu DRX configuration, in operation 1206, the UE may determine to report the SL DRX preference information to the BS and configure the SL DRX preference information. In embodiments of this disclosure, the SL DRX operation parameter preference information may include a combination of at least one or more pieces of information from Table 4 below. The UE may configure a UEAssistanceInformation message or a SidelinkUEInformation message that includes the SL DRX operation parameter preference information.

[0205] In embodiments of this disclosure, in operation 1204, the second UE can configure SL DRX preference information. When the second UE configures the SL DRX preference information, the second UE can send the configured SL DRX preference information to the first UE. In operation 1208, the first UE can send the SL DRX preference information to the BS. However, this is not a limitation; the UE in this disclosure can be either the first UE or the second UE.

[0206] In operation 1208, the UE can send SL DRX preference information to the BS. For example, in operation 1208, the UE can send a UEAssistanceInformation message or a SidelinkUEInformation message to the BS that includes SL DRX operation parameter preference information. When sl-drx-PreferenceProhibitTimer is set, the UE can start the timer (i.e., sl-drx-PreferenceProhibitTimer) and send a message including SL DRX preference information. Based on the SL DRX operation parameter preference information reported by the UE, the BS can configure SL DRX operation parameters for the UE.

[0207] In another embodiment, during operation 1202, when it is not necessary to report preference information regarding the corresponding preferences between the SL DRX configuration and the Uu DRX configuration, the UE may determine to report Uu DRX preference information to the BS. In this case, the UE may configure a UEAssistanceInformation message including the Uu DRX preference information and send it to the BS. The BS may then configure Uu DRX operation parameters for the UE based on the Uu DRX preference information.

[0208] In another embodiment of this disclosure, when the correspondence between the UE's preferred SL DRX configuration and Uu DRX configuration is determined in operation 1202, the UE can be configured to correspond preference information regarding Uu DRX operation parameters to the SL DRX operation parameters and report it to the BS. In this case, the UE can configure a UEAssistanceInformation message including Uu DRX operation parameter preference information, which includes a combination of at least one or more pieces of information from Table 5 configured to correspond to the SL DRX operation parameters. The UE can send the UEAssistanceInformation message including the Uu DRX operation parameter preference information to the BS. When drx-PreferenceProhibitTimer is set, the UE can start the timer (i.e., drx-PreferenceProhibitTimer) and send the message including the Uu DRX operation parameter preference information.

[0209] Based on the Uu DRX operation parameter preference information reported by the UE, the BS can configure Uu DRX operation parameters for the UE.

[0210] [Table 5]

[0211]

[0212] Figure 13 This is a diagram illustrating the operation of a UE processing bypass DRX and Uu link DRX according to an embodiment of this disclosure.

[0213] Reference Figure 13 In Operation 1300, the UE can obtain the SL DRX operation parameter configuration. For example, in Figure 11 or Figure 12 In one embodiment, the BS can configure the SLDRX operation parameter configuration based on SL DRX preference information or Uu DRX preference information reported by the UE to the BS. In another example, the SL DRX operation parameter configuration can be configured by the UE based on the UuDRX configuration received by the UE from the BS.

[0214] An example of the BS configuring SL DRX operation parameters based on SL DRX operation parameter preference information is as follows: (1) When information indicating the UE's preference for the correspondence between Uu DRX and SL DRX is included, the BS configures the SL DRX operation parameters to have values ​​corresponding to the UuDRX operation parameters and provides them to the UE. (2) The BS may configure the SL DRX operation parameters to have values ​​corresponding to the operation parameters of one of the UuDRX groups and provide them to the UE. (3) The BS may instruct the UE to configure the SL DRX operation parameter values ​​to the operation parameter values ​​of the Uu DRX group by providing the DRX group information of Uu DRX, instead of configuring the SL DRX operation parameters separately. (4) The BS may configure a new Uu DRX group instead of configuring the SL DRX operation parameters separately for the UE, so as to configure the SL DRX operation parameters based on the operation parameters of the newly configured Uu DRX group.

[0215] The following is an example of how the UE obtains the SL DRX operation parameter configuration based on the Uu DRX configuration information: The UE can determine whether the operation parameters of the Uu DRX group can correspond to the SL DRX operation parameters, and configure the SL DRX operation parameters as the operation parameter values ​​determined to be the corresponding Uu DRX group.

[0216] In operation 1302, the UE can determine whether both SL DRX and Uu DRX are configured. Operation 1302 may include at least one of the following: configuring both SL DRX and Uu DRX, configuring Uu DRX while configuring SL DRX, and configuring SL DRX while configuring Uu DRX.

[0217] When it is determined in operation 1302 that the UE has both SL DRX configuration and Uu DRX configuration, in operation 1304, the UE can perform SL DRX operation and Uu DRX operation according to their respective configurations. During DRX operation, the UE can perform SL data transmission or reception in BS scheduling mode based on the configured SLDRX operation parameters and Uu DRX operation parameters. When it is determined in operation 1302 that SL DRX is configured, the UE can perform SLDRX operation according to the SLDRX configuration.

[0218] In another embodiment, when it is determined in operation 1302 that Uu DRX is configured, the UE can perform Uu DRX operation according to the Uu DRX configuration.

[0219] In embodiments of this disclosure, when the BS configures the SLDRX parameters, the UE can maintain the currently used SLDRX configuration until it receives a new SLDRX configuration from the BS.

[0220] When a UE performs a handover to a target cell, once it is determined that the SL DRX preference information sent through the serving cell has changed, the UE can send a UEAssistanceInformation message or a SidelinkUEInformation message containing the SL DRX preference information to the target cell.

[0221] The methods of embodiments of this disclosure as described in the claims or specification of this disclosure can be implemented in hardware, software, or a combination of hardware and software.

[0222] When implemented in software, a computer-readable storage medium may be provided to store one or more programs (software modules). The one or more programs stored in the computer-readable storage medium are configured to be executed by one or more processors in an electronic device. The one or more programs may include instructions to cause the electronic device to perform methods according to the embodiments described in the claims or specification of this disclosure.

[0223] The program (software module, software) can be stored in random access memory (RAM), non-volatile memory including flash memory, read-only memory (ROM), electrically erasable programmable ROM (EEPROM), disk storage devices, optical disc-ROM (CD-ROM), digital versatile disc (DVD), or other types of optical storage devices and / or magnetic tape. Optionally, the program can be stored in a combination of some or all of the programs. Multiple memories may be present.

[0224] The program can also be stored in an attachable storage device that can be accessed via a communication network including the Internet, intranet, local area network (LAN), wide area network (WLAN), or storage area network (SAN), or a combination thereof. The storage device can be connected to an apparatus executing embodiments of this disclosure via an external port. Furthermore, a separate storage device within the communication network can be connected to an apparatus executing embodiments of this disclosure.

[0225] In embodiments of this disclosure, components are represented in either a singular or plural form. However, it should be understood that the singular or plural representation is chosen appropriately based on the presented context for ease of interpretation, and this disclosure is not limited to the singular or plural form of components. Furthermore, a component expressed in a plural form may also imply a singular form, and vice versa.

[0226] Therefore, several embodiments of this disclosure have been described, but it should be understood that various modifications can be made without departing from the scope of this disclosure. Consequently, it will be apparent to those skilled in the art that this disclosure is not limited to the described embodiments, but includes not only the appended claims, but also their equivalents.

Claims

1. A method performed by a first user equipment (UE) in a wireless communication system, the method comprising: The second UE receives bypass discontinuous reception DRX preference information for the second UE, the bypass DRX preference information for the second UE including at least one parameter preferred by the second UE for operating the bypass DRX of the second UE. Send bypass UE information, including bypass DRX preference information for the second UE, to the base station (BS); as well as The BS receives bypass DRX configuration information for the second UE, which is based on bypass DRX preference information for the second UE.

2. The method of claim 1, wherein, The Uu DRX of the first UE and the bypass DRX of the second UE at least partially overlap.

3. The method of claim 1, wherein, When the first UE is in Radio Resource Control (RRC_CONNECTED) and performing bypass operation in Resource Allocation Mode 1, the bypass DRX configuration information is received from the BS.

4. The method according to claim 1, wherein, When the first UE is in RRC_CONNECTED and performs bypass operation in resource allocation mode 1, the bypass DRX preference information is sent to the BS.

5. The method according to claim 1, wherein, The bypass DRX preference information includes information indicating whether the bypass DRX configuration information corresponds to the Uu DRX configuration information.

6. The method according to claim 1, wherein, The bypass DRX preference information is configured by the second UE.

7. The method according to claim 1, wherein, The bypass DRX preference information is configured to have values ​​corresponding to the Uu DRX operating parameters.

8. A method for operating a base station (BS) in a wireless communication system, the method comprising: The first user equipment (UE) receives bypass UE information including bypass discontinuous reception DRX preference information for the second UE, wherein the bypass DRX preference information for the second UE includes at least one parameter preferred by the second UE for operating the bypass DRX of the second UE. Based on the bypass DRX preference information for the second UE, determine the bypass DRX configuration information for the second UE; as well as The bypass DRX configuration information for the second UE is sent to the first UE. The bypass DRX configuration information for the second UE is based on the bypass DRX preference information for the second UE.

9. The method according to claim 8, wherein, The Uu DRX of the first UE and the bypass DRX of the second UE at least partially overlap.

10. The method according to claim 8, wherein, When the first UE is in Radio Resource Control (RRC_CONNECTED) and performing bypass operation in Resource Allocation Mode 1, the bypass DRX configuration information is sent to the first UE.

11. The method according to claim 8, wherein, When the first UE is in RRC_CONNECTED and performs bypass operation in resource allocation mode 1, the bypass DRX preference information is received from the first UE.

12. The method according to claim 8, wherein, The bypass DRX preference information includes information indicating whether the bypass DRX configuration information corresponds to the Uu DRX configuration information.

13. The method according to claim 8, wherein, The bypass DRX preference information is configured by the second UE.

14. The method according to claim 8, wherein, The bypass DRX preference information is configured to have values ​​corresponding to the Uu DRX operating parameters.

15. A first user equipment (UE) executing in a wireless communication system, the first UE comprising: communicator; and At least one processor, coupled to the communicator, is configured to: The control communicator receives bypass discontinuous reception DRX preference information for the second UE from the second UE. The bypass DRX preference information for the second UE includes at least one parameter preferred by the second UE for operating the bypass DRX of the second UE. The control communicator sends bypass UE information, including bypass DRX preference information for the second UE, to the base station BS; as well as The control communicator receives bypass DRX configuration information for the second UE from the BS. The bypass DRX configuration information for the second UE is based on bypass DRX preference information for the second UE.

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