Method and apparatus for selecting a sidelink Tx resource pool in a wireless communication system

Abstract

The present disclosure relates to a communication method and system for integrating a fifth generation (5G) communication system supporting a high data rate exceeding that of a fourth generation (4G) system with Internet of Things (IoT) technology. The present disclosure can be applied to smart services based on 5G communication technology and IoT-related technologies, such as smart homes, smart buildings, smart cities, smart cars, connected cars, health care, digital education, smart retail, safety and security services. The present disclosure relates to a method of a user equipment (UE) in a wireless communication system. The method includes: receiving configuration information of a transmit (TX) resource pool including at least one of a first group of resource pools or a second group of resource pools; at a radio resource control (RRC) sublayer, identifying the first group of resource pools and the second group of resource pools based on a hybrid automatic repeat request (HARQ) feedback channel; at a medium access control (MAC) sublayer, selecting a logical channel for sending side link (SL) data, wherein the logical channel includes the highest priority among multiple logical channels using a logical channel prioritization (LCP) function; at the MAC sublayer, determining whether the logical channel is configured with a HARQ feedback channel; at the MAC sublayer, selecting a TX resource pool from the first group of resource pools based on determining that the logical channel is configured with a HARQ feedback channel; and sending SL data based on the TX resource pool.

Description

Technical Field

[0001] The present disclosure relates generally to wireless communication systems, and more particularly, to sidelink (SL) transmit (TX) resource pool selection in vehicle-to-everything (V2X) communications. Background Art

[0002] In order to meet the growing demand for wireless data services since the deployment of 4G communication systems, efforts have been made to develop improved 5G communication systems or quasi-5G communication systems. Therefore, "5G communication systems" or "quasi-5G communication systems" are called "super 4G network" communication systems or "post-long term evolution (Post LTE) systems". It is considered to implement 5G communication systems in higher frequency (millimeter wave) bands (for example, 60GHz bands) in order to achieve higher data rates. In order to reduce the propagation loss of radio waves and increase the transmission distance, the following are discussed in 5G communication systems: beamforming, massive multiple input multiple output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology. In addition, in 5G communication systems, system network improvements are being developed based on advanced small cells, cloud radio access networks (cloud RAN), ultra-dense networks, device-to-device (D2D) communications, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP), and receiving-end interference elimination. In 5G systems, hybrid frequency shift keying (FSK) and quadrature amplitude modulation (QAM) (FQAM) and sliding window superposition coding (SWSC) as advanced coding modulation (ACM) technologies have been developed, as well as filter bank multi-carrier (FBMC), non-orthogonal multiple access (NOMA) and sparse code multiple access (SCMA) as advanced access technologies.

[0003] The Internet has evolved from a human-centered connected network where humans generate and consume information to the Internet of Things (IoT); in the IoT, distributed entities such as objects can exchange and process information without human intervention. The Internet of Everything (IoE) is emerging, which is a combination of IoT technology and big data processing technology achieved through connection with cloud servers. For the realization of IoT, various technical elements such as "sensing technology", "wired / wireless communication and network infrastructure", "service interface technology" and "security technology" have been required; recently, sensor networks, machine-to-machine (M2M) communication, machine type communication (MTC), etc. have been studied. Such an IoT environment can provide intelligent Internet technology (IT) services that create new value for human life by collecting and analyzing data generated in connected objects. Through the integration and combination of existing information technology (IT) technologies and various industrial applications, the Internet of Things can be applied to various fields such as smart homes, smart buildings, smart cities, smart cars or connected cars, smart grids, health care, smart appliances, advanced medical services, etc.

[0004] In view of this, various attempts have been made to apply 5G communication systems to IoT networks. For example, technologies such as sensor networks, machine type communications (MTC), and machine-to-machine (M2M) communications can be implemented through beamforming, MIMO, and array antennas. Cloud radio access networks (RANs) as an application of the above-mentioned big data processing technologies can also be seen as an example of the integration of 5G technology and IoT technology.

[0005] Fifth generation (5G) or new radio (NR) mobile communications are gathering more momentum recently, with global technical activities for various candidate technologies from industry and academia. Candidate enabling technologies for 5G / NR mobile communications include: massive antenna technology, which extends from traditional cellular frequency bands up to high frequencies to provide beamforming gain and support increased capacity; new waveforms (e.g., new radio access technologies (RATs)) that flexibly adapt to various services / applications with different requirements; new multiple access schemes that support large-scale connections, etc.

[0006] Meanwhile, considering the development of wireless communication from generation to generation, these technologies are mainly developed for services for humans, such as voice calls, multimedia services and data services. With the commercialization of 5G (fifth generation) communication systems, it is expected that the number of connected devices will grow exponentially. These devices will be increasingly connected to communication networks. Examples of connected objects may include vehicles, robots, drones, household appliances, displays, smart sensors connected to various infrastructures, construction machinery and factory equipment. Mobile devices are expected to evolve into various forms, such as augmented reality glasses, virtual reality headsets and hologram devices. In order to provide various services by connecting hundreds of billions of devices and objects in the 6G (sixth generation) era, efforts have been made to develop improved 6G communication systems. For these reasons, 6G communication systems are referred to as super 5G systems.

[0007] 6G communication systems are expected to be commercialized around 2030, with a peak data rate of terabit (1,000 gigabits) per second and a radio delay of less than 100 microseconds, making them 50 times faster and 1 / 10 of the radio delay of 5G communication systems.

[0008] In order to achieve such high data rates and ultra-low latency, the implementation of 6G communication systems in the terahertz band (e.g., 95 GHz to 3 THz band) has been considered. It is expected that due to the more severe path loss and atmospheric absorption in the terahertz band compared to the path loss and atmospheric absorption in the millimeter wave band introduced in 5G, the technology that can ensure the signal transmission distance (i.e., coverage) will become more critical. As the main technology to ensure coverage, it is necessary to develop radio frequency (RF) elements, antennas, new waveforms with better coverage than orthogonal frequency division multiplexing (OFDM), beamforming and massive multiple input multiple output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas and multi-antenna transmission technologies such as massive antennas. In addition, new technologies to improve the coverage of terahertz band signals, such as metamaterial-based lenses and antennas, orbital angular momentum (OAM) and reconfigurable smart surfaces (RIS), have been discussed.

[0009] In addition, in order to improve spectrum efficiency and overall network performance, the following technologies have been developed for 6G communication systems: full-duplex technology for enabling uplink and downlink transmissions to use the same frequency resources simultaneously; network technology for comprehensive utilization of satellites, high altitude platform stations (HAPS), etc.; improved network structure for supporting mobile base stations, etc. and realizing network operation optimization and automation, etc.; dynamic spectrum sharing technology with conflict avoidance based on prediction of spectrum use; use of artificial intelligence (AI) in wireless communication to improve overall network operation by utilizing AI from the design stage of developing 6G and internalizing end-to-end AI support functions; and next-generation distributed computing technology that overcomes the limitations of UE computing capabilities through ultra-high performance communication and computing resources (such as mobile edge computing (MEC), cloud, etc.) available on the network. In addition, attempts are continuing to develop mechanisms for realizing hardware-based security environments and secure use of data and technologies for protecting privacy, strengthening connections between devices, optimizing networks, promoting the softening of network entities, and improving the openness of wireless communications through the design of new protocols for 6G communication systems.

[0010] It is expected that research and development of 6G communication systems in hyperconnectivity, including human-to-machine (P2M) and machine-to-machine (M2M), will allow the next hyperconnected experience. In particular, it is expected that services such as truly immersive extended reality (XR), high-fidelity mobile holograms, and digital replicas can be provided through 6G communication systems. In addition, services such as remote surgery, industrial automation, and emergency response for enhanced safety and reliability will be provided through 6G communication systems, so that these technologies can be applied to various fields such as industry, medical care, automobiles, and home appliances. Summary of the invention

[0011] Technical issues

[0012] If multiple TX resource pools are configured / preconfigured, in LTE V2X communication, RRC selects a TX resource pool and provides the selected TX resource pool information to MAC, so MAC selects the actual resource within the indicated TX resource pool. However, this TX resource pool selection mechanism does not seem to be good in the newly designed NR V2X communication.

[0013] Technical Solution

[0014] In one embodiment, a method performed by a user equipment (UE) in a wireless communication system is provided, the method comprising: receiving configuration information from a base station, the configuration information comprising first information about a side link (SL) transmission (TX) resource pool and second information about a SL logical channel configuration; identifying whether a logical channel with the highest priority in logical channel priority order for SL data transmission is configured with a hybrid automatic repeat request (HARQ) feedback based on the second information; in the case where the logical channel with the highest priority is configured with the HARQ feedback, selecting a SL TX resource pool configured with HARQ feedback channel resources from the SL TX resource pool; and transmitting SL data based on the SL TX resource pool configured with the HARQ feedback channel resources. In the method, the second information comprises priority information of the logical channel and information indicating whether the HARQ feedback is configured for the logical channel. In the method, the configuration information is received via a system information block (SIB). Alternatively, the configuration information is received via a radio resource control (RRC) reconfiguration message dedicated to the UE.

[0015] In another embodiment, a user equipment (UE) in a wireless communication system is provided, the UE comprising: a transceiver; and at least one processor, the at least one processor being configured to: receive configuration information from a base station via the transceiver, the configuration information comprising first information about a side link (SL) transmission (TX) resource pool and second information about a SL logical channel configuration; identify whether a logical channel with the highest priority in logical channel priority order for SL data transmission is configured with a hybrid automatic repeat request (HARQ) feedback based on the second information; in the case where the logical channel with the highest priority is configured with the HARQ feedback, select a SL TX resource pool configured with HARQ feedback channel resources from the SL TX resource pool; and, transmit SL data via the transceiver based on the SL TX resource pool configured with the HARQ feedback channel resources. In the UE, the second information comprises priority information of the logical channel and information indicating whether the HARQ feedback is configured for the logical channel. In the UE, the configuration information is received via a system information block (SIB). Alternatively, the configuration information is received via a radio resource control (RRC) reconfiguration message dedicated to the UE.

[0016] In another embodiment, a method performed by a base station in a wireless communication system is provided, the method comprising: generating configuration information, the configuration information comprising first information about a side link (SL) transmission (TX) resource pool and second information about a SL logical channel configuration; and sending the generated configuration information, wherein, when it is known from the second information that a logical channel with the highest priority according to a logical channel priority ranking for SL data transmission of a user equipment (UE) is configured with a hybrid automatic repeat request (HARQ) feedback, a SL TX resource pool configured with HARQ feedback channel resources among the SL TX resource pools is used for SL data transmission of the UE. In the method, the second information comprises priority information of the logical channel and information indicating whether the HARQ feedback is configured for the logical channel. In the method, the configuration information is sent via a system information block (SIB) or a radio resource control (RRC) reconfiguration message dedicated to the UE.

[0017] In yet another embodiment, a base station in a wireless communication system is provided, the base station comprising: a transceiver; and at least one processor, the at least one processor being configured to: generate configuration information, the configuration information comprising first information about a side link (SL) transmission (TX) resource pool and second information about a SL logical channel configuration; and send the generated configuration information via the transceiver, wherein, when it is known from the second information that a logical channel with the highest priority according to a logical channel priority ranking for SL data transmission of a user equipment (UE) is configured with a hybrid automatic repeat request (HARQ) feedback, a SL TX resource pool configured with HARQ feedback channel resources among the SL TX resource pools is used for SL data transmission of the UE. In the base station, the second information comprises priority information of the logical channel and information indicating whether the HARQ feedback is configured for the logical channel. In the base station, the configuration information is sent via a system information block (SIB). Alternatively, the configuration information is sent via a radio resource control (RRC) reconfiguration message dedicated to the UE.

[0018] According to the following drawings, specific embodiments and claims, those skilled in the art can easily know other technical features.

[0019] Technical Effects

[0020] The present disclosure relates to a wireless communication system, and more particularly, to a SL TX resource pool selection in V2X communication. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] For a more complete understanding of the present disclosure and advantages thereof, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts:

[0022] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown;

[0023] Figure 2 An example gNB according to an embodiment of the present disclosure is shown;

[0024] Figure 3 An example UE according to an embodiment of the present disclosure is shown;

[0025] Figure 4 and Figure 5 Example wireless transmit and receive paths according to the present disclosure are shown;

[0026] Figure 6 shows an example V2X communication via a side link according to an embodiment of the present disclosure;

[0027] Figure 7 A flowchart showing a TX resource pool selection method of a UE according to an embodiment of the present disclosure is shown; and

[0028] Figure 8 A flowchart of a method for side chain TX resource pool selection according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0029] Before proceeding to the following detailed description, it may be beneficial to clarify the definitions of certain words and phrases used in this patent document. The term "coupling" and its derivatives refer to any direct or indirect communication between two or more elements, whether or not there is physical contact between these elements. The terms "send", "receive" and "communication" and their derivatives include both direct communication and indirect communication. The terms "include" and "comprise" and their derivatives mean including but not limited to. The term "or" is inclusive, meaning and / or. The phrase "related to..." and its derivatives mean including, included in, interconnected with, included, contained in, connected with, coupled with, communicable with, cooperative with, intertwined, juxtaposed, close to, combined with, having, having... attributes, having a relationship with, etc. The term "controller" refers to any device, system or part thereof that controls at least one operation. Such a controller can be implemented with hardware or a combination of hardware and software and / or firmware. The functions associated with any particular controller can be centralized or distributed, whether local or remote. The phrase "at least one of" when used with a list of items means that different combinations of one or more of the listed items may be used, and only one of the items in the list may be required. For example, "at least one of A, B, and C" includes any of the following combinations: A; B; C; A and B; A and C; B and C; and A, B, and C.

[0030] In addition, the various functions described below can be implemented or supported by one or more computer programs, each of which is formed by a computer-readable program code and embodied in a computer-readable medium. The terms "application" and "program" refer to one or more computer programs, software components, instruction sets, processes, functions, objects, classes, instances, related data or a portion thereof that are suitable for implementation in a suitable computer-readable program code. The phrase "computer-readable program code" includes any type of computer code, including source code, object code and executable code. The phrase "computer-readable medium" includes any type of medium that can be accessed by a computer, such as a read-only memory (ROM), a random access memory (RAM), a hard drive, a compact disk (CD), a digital video disc (DVD) or any other type of memory. "Non-transitory" computer-readable media does not include wired, wireless, optical or other communication links that transmit temporary electrical signals or other signals. Non-transitory computer-readable media include media that can permanently store data and media in which data can be stored and subsequently overwritten, such as rewritable optical disks or erasable storage devices.

[0031] Definitions for certain other words and phrases are provided throughout this patent document. Those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior and future uses of such defined words and phrases.

[0032] Discussed below Figures 1 to 8 The various embodiments used to describe the principles of the present disclosure in this patent document are for illustration only and should not be interpreted in any way as limiting the scope of the present disclosure. Those skilled in the art will understand that the principles of the present disclosure can be implemented in any appropriately arranged system or device.

[0033] The following documents are hereby incorporated by reference into the present disclosure as if fully set forth herein: 3GPP TS 38.213 v15.7.0, “NR; Physical layer procedures for control”; 3GPP TS 38.215 v.15.5.0: “Physical layer measurements”; and 3GPP TS 38.214 v15.7.0, “NR; Physical layer procedures for data”; 3GPP TS 38.331 v.15.7.0, “Radio Resource Control (RRC) Protocol Specification”; and 3GPP TR 38.885 v.16.0.0: “NR Vehicle-to-Everything (V2X) Study”.

[0034] The following Figure 1-Figure 3 Various embodiments are described that are implemented in a wireless communication system and utilize Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) communication techniques. Figure 1-Figure 3 The description is not meant to imply physical or architectural limitations to the manner in which different embodiments may be implemented. Different embodiments of the present disclosure may be implemented in any suitably arranged communications system.

[0035] Figure 1 An example wireless network according to an embodiment of the present disclosure is shown. Figure 1 The embodiment of the wireless network shown in FIG. 1 is for illustration only. Other embodiments of the wireless network 100 may be used without departing from the scope of the present disclosure.

[0036] like Figure 1 As shown, the wireless network includes gNB 101 (e.g., base station BS), gNB 102, and gNB 103. gNB 101 communicates with gNB 102 and gNB 103. gNB 101 also communicates with at least one network 130, such as the Internet, a proprietary Internet Protocol (IP) network, or other data network.

[0037] gNB 102 provides wireless broadband access to network 130 for a first plurality of user equipment (UE) within coverage area 120 of gNB 102. The first plurality of UEs include: UE 111, which may be located in a small enterprise; UE 112, which may be located in an enterprise (E); UE 113, which may be located in a WiFi hotspot (HS); UE 114, which may be located in a first residence (R); UE 115, which may be located in a second residence (R); and UE 116, which may be a mobile device (M), such as a cell phone, a wireless laptop, a wireless PDA, etc. gNB 103 provides wireless broadband access to network 130 for a second plurality of UEs within coverage area 125 of gNB 103. The second plurality of UEs include UE 115 and UE 116. In some embodiments, one or more gNBs 101-103 may communicate with each other and with UEs 111-116 using 5G / NR, LTE, LTE-A, WiMAX, WiFi, or other wireless communication technologies.

[0038] Depending on the network type, the term "base station" or "BS" may refer to any component (or set of components) configured to provide wireless access to a network, such as a transmission point (TP), a transmission-reception point (TRP), an enhanced base station (eNodeB or eNB), a 5G / NR base station (gNB), a macro cell, a micro cell, a WiFi access point (AP), or other wirelessly enabled devices. The base station may provide wireless access according to one or more of the following wireless communication protocols, for example: 5G / NR Third Generation Partnership Project (3GPP) NR, Long Term Evolution (LTE), Advanced LTE (LTE-A), High Speed ​​Packet Access (HSPA), Wi-Fi 802.11a / b / g / n / ac, etc. For convenience, the terms "BS" and "TRP" in this patent document may be used interchangeably to refer to network infrastructure components that provide wireless access to remote terminals. In addition, depending on the network type, the term "user equipment" or "UE" may refer to any component, such as a "mobile station", "user station", "remote terminal", "wireless terminal", "reception point", or "user equipment". For convenience, the terms "user equipment" and "UE" used in this patent document refer to a remote wireless device that wirelessly accesses a BS, regardless of whether the UE is a mobile device (such as a mobile phone or smartphone) or is generally considered a fixed device (such as a desktop computer or vending machine).

[0039] The dashed lines represent the approximate extents of coverage areas 120 and 125, which are shown as generally circular for purposes of illustration and explanation only. It should be clearly understood that coverage areas associated with a gNB, such as coverage areas 120 and 125, may have other shapes, including irregular shapes, depending on the configuration of the gNB and variations in the radio environment associated with natural and man-made obstacles.

[0040] As described in more detail below, one or more of UEs 111-116 include circuitry, programming, or a combination thereof for sidelink Tx resource pool selection. In certain embodiments, one or more of gNBs 101-103 include circuitry, programming, or a combination thereof to enable sidelink resource pools.

[0041] although Figure 1 An example of a wireless network is shown, but Figure 1 Various changes may be made. For example, the wireless network may include any number of gNBs and any number of UEs in any suitable arrangement. In addition, gNB 101 may communicate directly with any number of UEs and provide wireless broadband access to network 130 for these UEs. Similarly, each gNB 102-103 may communicate directly with network 130 and provide direct wireless broadband access to network 130 for the UEs. In addition, gNBs 101, 102, and / or 103 may provide access to other or additional external networks, such as an external telephone network or other types of data networks.

[0042] Figure 2 An example gNB 102 is shown according to an embodiment of the present disclosure. Figure 2 The embodiment of gNB 102 shown in FIG. is for illustration only. Figure 1 gNBs 101 and 103 may have the same or similar configurations. However, gNBs have a variety of configurations. Figure 2 The scope of the present disclosure is not limited to any particular implementation of the gNB.

[0043] like Figure 2 As shown, gNB 102 includes multiple antennas 205a-205n, multiple RF transceivers 210a-210n, TX processing circuitry 215, and receive (RX) processing circuitry 220. gNB 102 also includes a controller / processor 225, a memory 230, and a backhaul or network interface 235.

[0044] The RF transceivers 210a-210n receive incoming RF signals from the antennas 205a-205n, such as signals transmitted by UEs in the network 100. The RF transceivers 210a-210n downconvert the incoming RF signals to produce IF or baseband signals. The IF or baseband signals are sent to the RX processing circuit 220, which generates processed baseband signals by filtering, decoding and / or digitizing the baseband or IF signals. The RX processing circuit 220 sends the processed baseband signals to the controller / processor 225 for further processing.

[0045] The TX processing circuit 215 receives analog or digital data (such as voice data, web data, email, or interactive video game data) from the controller / processor 225. The TX processing circuit 215 encodes, multiplexes, and / or digitizes the outgoing baseband data to produce a processed baseband or IF signal. The RF transceivers 210a-210n receive the outgoing processed baseband or IF signals from the TX processing circuit 215 and up-convert the baseband or IF signals to RF signals that are transmitted via the antennas 205a-205n.

[0046] The controller / processor 225 may include one or more processors or other processing devices that control the overall operation of the gNB 102. For example, the controller / processor 225 may control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceivers 210a-210n, the RX processing circuitry 220, and the TX processing circuitry 215 in accordance with well-known principles. The controller / processor 225 may also support other functions, such as more advanced wireless communication functions. For example, the controller / processor 225 may support beamforming or directional routing operations, in which outgoing signals from / incoming signals to multiple antennas 205a-205n are weighted differently to effectively steer the outgoing signals in a desired direction. In the gNB 102, the controller / processor 225 may support any of a variety of other functions.

[0047] Controller / processor 225 is also capable of executing programs and other processes, such as an OS, that reside in memory 230. Controller / processor 225 may move data into or out of memory 230 as required by the executing process.

[0048] The controller / processor 225 is also coupled to a backhaul or network interface 235. The backhaul or network interface 235 allows the gNB 102 to communicate with other devices or systems via a backhaul connection or via a network. The interface 235 may support communications over any suitable wired or wireless connection. For example, when the gNB 102 is implemented as part of a cellular communication system (e.g., a system supporting 5G / NR, LTE, or LTE-A), the interface 235 may allow the gNB 102 to communicate with other gNBs via a wired or wireless backhaul connection. When the gNB 102 is implemented as an access point, the interface 235 may allow the gNB 102 to communicate with a larger network (such as the Internet) via a wired or wireless local area network or via a wired or wireless connection. The interface 235 includes any suitable structure that supports communications over a wired or wireless connection, such as an Ethernet or RF transceiver.

[0049] Memory 230 is coupled to controller / processor 225. A portion of memory 230 may include RAM, and another portion of memory 230 may include flash memory or other ROM.

[0050] although Figure 2 An example of a gNB 102 is shown, but the Figure 2 For example, gNB 102 may include Figure 2 . As a specific example, an access point may include multiple interfaces 235, and the controller / processor 225 may support routing functions for routing data between different network addresses. As another specific example, although shown as including a single instance of TX processing circuitry 215 and a single instance of RX processing circuitry 220, the gNB 102 may include multiple instances of each (such as one for each RF transceiver). In addition, Figure 2 The various components in may be combined, further subdivided, or omitted, and additional components may be added according to specific needs.

[0051] Figure 3 An example UE 116 is shown in accordance with an embodiment of the present disclosure. Figure 3 The embodiment of UE 116 shown in FIG. 1 is for illustration only. Figure 1 UEs 111-115 may have the same or similar configurations. However, UEs have a variety of configurations. Figure 3 The scope of the present disclosure is not limited to any particular implementation of the UE.

[0052] like Figure 3As shown, UE 116 includes antenna 305, radio frequency (RF) transceiver 310, TX processing circuit 315, microphone 320 and receive (RX) processing circuit 325. UE 116 also includes speaker 330, processor 340, input / output (I / O) interface (IF) 345, touch screen 350, display 355 and memory 360. Memory 360 includes operating system (OS) 361 and one or more applications 362.

[0053] RF transceiver 310 receives incoming RF signals from antenna 305 transmitted by a gNB of network 100. RF transceiver 310 downconverts the incoming RF signals to produce an intermediate frequency (IF) or baseband signal. The IF or baseband signal is sent to RX processing circuitry 325, which generates a processed baseband signal by filtering, decoding, and / or digitizing the baseband or IF signal. RX processing circuitry 325 sends the processed baseband signal to speaker 330 (such as for voice data) or to processor 340 for further processing (such as for web browsing data).

[0054] The TX processing circuit 315 receives analog or digital voice data from the microphone 320 or other outgoing baseband data (such as web data, email, or interactive video game data) from the processor 340. The TX processing circuit 315 encodes, multiplexes, and / or digitizes the outgoing baseband data to produce a processed baseband or IF signal. The RF transceiver 310 receives the outgoing processed baseband or IF signal from the TX processing circuit 315 and up-converts the baseband or IF signal to an RF signal that is transmitted via the antenna 305.

[0055] The processor 340 may include one or more processors or other processing devices and execute the OS 361 stored in the memory 360 to control the overall operation of the UE 116. For example, the processor 340 may control the reception of forward channel signals and the transmission of reverse channel signals by the RF transceiver 310, the RX processing circuit 325, and the TX processing circuit 315 according to well-known principles. In some embodiments, the processor 340 includes at least one microprocessor or microcontroller.

[0056] The processor 340 is also capable of executing other processes and programs resident in the memory 360, such as processes for beam management. The processor 340 can move data into or out of the memory 360 as needed to execute the process. In some embodiments, the processor 340 is configured to execute the application 362 based on the OS 361 or in response to a signal received from the gNB or operator. The processor 340 is also coupled to the I / O interface 345, which provides the UE 116 with the ability to connect to other devices such as laptops and handheld computers. The I / O interface 345 is the communication path between these accessories and the processor 340.

[0057] Processor 340 is also coupled to touch screen 350 and display 355. An operator of UE 116 may enter data into UE 116 using touch screen 350. Display 355 may be a liquid crystal display, light emitting diode display, or other display capable of presenting text and / or at least limited graphics, such as from a website.

[0058] Memory 360 is coupled to processor 340. A portion of memory 360 may include random access memory (RAM), while another portion of memory 360 may include flash memory or other read-only memory (ROM).

[0059] although Figure 3 An example of UE 116 is shown, but the Figure 3 Make various changes. For example, Figure 3 The various components in the embodiment may be combined, further subdivided, or omitted, and additional components may be added according to specific needs. As a specific example, processor 340 may be divided into multiple processors, such as one or more central processing units (CPUs) and one or more graphics processing units (GPUs). In addition, although Figure 3 The UE 116 is shown configured as a mobile handset or smartphone, but the UE may be configured to operate as other types of mobile or stationary devices.

[0060] In order to meet the increased demand for wireless data services since the deployment of 4G communication systems and to realize various vertical applications, 5G / NR communication systems have been developed and are currently being deployed. The 5G / NR communication system is considered to be implemented in a higher frequency (millimeter wave) band (such as the 28 GHz or 60 GHz band) to achieve higher data rates, or in a lower frequency band (such as 6 GHz) to achieve robust coverage and mobility support. In order to reduce the propagation loss of radio waves and increase the transmission distance, beamforming, massive multiple-input multiple-output (MIMO), full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, and massive antenna technology are discussed in the 5G / NR communication system.

[0061] In addition, in the 5G / NR communication system, development for system network improvement is being carried out based on advanced small cells, cloud radio access network (RAN), ultra-dense networks, device-to-device (D2D) communication, wireless backhaul, mobile networks, collaborative communications, coordinated multi-point (CoMP) and receiving-end interference cancellation.

[0062] The discussion of 5G systems and frequency bands associated therewith is for reference purposes only, as certain embodiments of the present disclosure may be implemented in 5G systems. However, the present disclosure is not limited to 5G systems or frequency bands associated therewith, and embodiments of the present disclosure may be used in conjunction with any frequency band. For example, aspects of the present disclosure may also be applied to the deployment of 5G communication systems, 6G, or even subsequent versions that may use terahertz (THz) frequency bands.

[0063] The communication system includes: a downlink (DL), which refers to transmission from a base station or one or more transmission points to a UE; and an uplink (UL), which refers to transmission from a UE to a base station or one or more reception points.

[0064] The time unit for DL ​​signaling or UL signaling on a cell is called a time slot and may include one or more symbols. A symbol may also serve as an additional time unit. A frequency (or bandwidth (BW)) unit is called a resource block (RB). An RB includes multiple subcarriers (SCs). For example, a time slot may have a duration of 0.5 milliseconds or 1 millisecond, include 14 symbols, and an RB may include 12 SCs, etc., where the spacing between SCs is 15 KHz or 30 KHz.

[0065] DL signals include data signals conveying information content, control signals conveying DL control information (DCI), and reference signals (RS) also known as pilot signals. The gNB sends data information or DCI through their respective physical DL shared channels (PDSCH) or physical DL control channels (PDCCH). PDSCH or PDCCH can be sent over a variable number of time slot symbols including one time slot symbol. For simplicity, the DCI format for UE scheduling PDSCH reception is called DL DCI format, and the DCI format for scheduling physical uplink shared channel (PUSCH) transmission from the UE is called UL DCI format.

[0066] The gNB transmits one or more of multiple types of RS, including Channel State Information RS (CSI-RS) and Demodulation RS (DMRS). CSI-RS is primarily used by the UE to make measurements and provide CSI to the gNB. For channel measurements, non-zero power CSI-RS (NZP CSI-RS) resources are used. For Interference Measurement Report (IMR), CSI Interference Measurement (CSI-IM) resources associated with a zero power CSI-RS (ZP CSI-RS) configuration are used. The CSI process includes both NZP CSI-RS and CSI-IM resources.

[0067] The UE can determine the CSI-RS transmission parameters through DL control signaling or high-level signaling (such as RRC signaling) from the gNB. The transmission instance of CSI-RS can be indicated by DL control signaling or configured by high-level signaling. DMRS is only sent in the BW of the corresponding PDCCH or PDSCH, and the UE can use DMRS to demodulate data or control information.

[0068] Figure 4 and Figure 5 An example wireless transmit path and receive path according to the present disclosure are shown. In the following description, the transmit path 400 may be described as being implemented in a gNB (such as gNB 102) and the receive path 500 may be described as being implemented in a UE (such as UE 116). However, it is understood that the receive path 500 may be implemented in a gNB and the transmit path 400 may be implemented in a UE. In some embodiments, the receive path 500 is configured to support sidelink Tx resource pool selection as described in embodiments of the present disclosure.

[0069] like Figure 4 The transmit path 400 shown includes a channel coding and modulation block 405, a serial to parallel (S-to-P) block 410, an inverse fast Fourier transform (IFFT) block of size N 415, a parallel to serial (P-to-S) block 420, an add cyclic prefix block 425, and an upconverter (UC) 430. Figure 5 As shown, the receiving path 500 includes a down converter (DC) 555, a cyclic prefix removal block 560, a serial to parallel (S-to-P) block 565, a size N fast Fourier transform (FFT) block 570, a parallel to serial (P-to-S) block 575 and a channel decoding and demodulation block 580.

[0070] like Figure 4 As shown, channel coding and modulation block 405 receives a set of information bits, applies coding (such as low-density parity-check (LDPC) coding), and modulates the input bits (such as with quadrature phase-shift keying (QPSK) or quadrature amplitude modulation (QAM)) to produce a sequence of frequency-domain modulation symbols.

[0071] The serial to parallel block 410 converts (such as demultiplexes) the serial modulation symbols into parallel data to produce N parallel symbol streams, where N is the IFFT / FFT size used in the gNB 102 and the UE 116. The size N IFFT block 415 performs an IFFT operation on the N parallel symbol streams to produce a time domain output signal. The parallel to serial block 420 converts (such as multiplexes) the parallel time domain output symbols from the size N IFFT block 415 to generate a serial time domain signal. The add cyclic prefix block 425 inserts a cyclic prefix to the time domain signal. The up converter 430 modulates (such as upconverts) the output of the add cyclic prefix block 425 to an RF frequency for transmission over a wireless channel. The signal may also be filtered at baseband before being converted to an RF frequency.

[0072] The RF signal transmitted from gNB 102 reaches UE 116 after passing through the wireless channel, and UE 116 performs operations reverse to those of gNB 102.

[0073] like Figure 5 As shown, the down converter 555 down-converts the received signal to the baseband frequency, and the cyclic prefix removal block 560 removes the cyclic prefix to produce a serial time domain baseband signal. The serial to parallel block 565 converts the time domain baseband signal to a parallel time domain signal. The size N FFT block 570 performs an FFT algorithm to generate N parallel frequency domain signals. The parallel to serial block 575 converts the parallel frequency domain signals into a sequence of modulated data symbols. The channel decoding and demodulation block 580 demodulates and decodes the modulation symbols to recover the original input data stream.

[0074] Each of gNBs 101-103 may implement Figure 4 The transmission path 400 shown is similar to that for transmitting to UEs 111-116 in the downlink, and may be implemented as follows: Figure 5 1-103. The receive path 500 shown is similar to that for receiving from UE 111-116 in the uplink. Similarly, each of UE 111-116 may implement transmit path 400 for transmitting to gNB 101-103 in the uplink and may implement receive path 500 for receiving from gNB 101-103 in the downlink.

[0075] Figure 4 and Figure 5 Each component in may be implemented using hardware only or a combination of hardware and software / firmware. As a specific example, Figure 4 and Figure 5At least some components in can be implemented with software, while other components can be implemented with configurable hardware or a combination of software and configurable hardware. For example, FFT block 570 and IFFT block 515 can be implemented as configurable software algorithms, wherein the value of size N can be modified according to the implementation.

[0076] In addition, although described as using FFT and IFFT, this is only by way of illustration and should not be construed as limiting the scope of the present disclosure. Other types of transforms may be used, such as discrete Fourier transform (DFT) and inverse discrete Fourier transform (IDFT) functions. It will be appreciated that for DFT and IDFT functions, the value of variable N may be any integer (such as 1, 2, 3, 4, etc.), while for FFT and IFFT functions, the value of variable N may be any integer of a power of 2 (such as 1, 2, 4, 8, 16, etc.).

[0077] although Figure 4 and Figure 5 An example of a wireless transmission path and a reception path is shown, but the Figure 4 and Figure 5 Make various changes. For example, Figure 4 and Figure 5 The various components in may be combined, further subdivided, or omitted, and additional components may be added based on specific needs. Figure 4 and Figure 5 It is intended to illustrate examples of the types of transmit paths and receive paths that may be used in a wireless network. Any other suitable architecture may be used to support wireless communications in a wireless network.

[0078] In the 3GPP wireless communication standard, NR has been discussed as 5G wireless communication. One of the features of NR is V2X. Figure 6 Describes an example scenario of vehicle-to-vehicle communication. Two or more vehicles can send and receive data / control via a direct link / interface between vehicles. A direct link / interface between vehicles or between a vehicle and other objects is named SL in 3GPP. Note that Figure 6 The following scenarios are described: the vehicles can still communicate with the gNB to obtain SL resources, SL radio bearer configuration, etc., but it is also possible that the vehicles still communicate with each other through SL even without interacting with the gNB. In this case, the SL resources and SL radio bearer configuration, etc. are pre-configured (e.g., via the V2X server or any other core network entity).

[0079] Figure 6 An example V2X communication via a side link 600 is shown according to an embodiment of the present disclosure. Figure 6 The embodiment of V2X communication via side link 600 shown in FIG. 6 is for illustration only.

[0080] Compared to the uplink (UL) (link from UE to gNB), one of the differences is the resource allocation for transmission. In UL, the resources for transmission are indicated by the gNB through the L1 control channel, so the UE only sends data / control through the indicated resources. In SL, the UE selects the SL TX resource pool from the configured multiple resource pools by itself, and then, based on the UE's channel sensing results and the number of resources required for data / control transmission, it selects the actual SL resources for transmission within the selected SL TX resource pool by itself.

[0081] A resource pool is a set of time-frequency resources that can be used for SL transmission and / or reception. From the UE's perspective, a resource pool is located within the UE's bandwidth, within the SL bandwidth part (BWP), and has a single numerology. The time domain resources in a resource pool can be non-contiguous. Multiple resource pools can be (pre-)configured to a UE in a carrier. A TX resource pool is the resources used for SL transmission by a UE and an RX resource pool is the resources used for SL reception by a UE. Multiple TX resource pools can be configured by the gNB (for UEs interested in V2X communication within the gNB coverage) or pre-configured in advance by the core network control / data function entity (for UEs interested in V2X communication outside the gNB coverage). If multiple TX resource pools are configured / pre-configured, the UE first needs to select a TX resource pool from the multiple TX resource pools. Note that multiple TX resource pools can be configured via a System Information Block (SIB) which is broadcasted or pre-configured in the cell by the gNB.

[0082] For SL communication, the radio interface layer 2 / layer 3 (L2 / L3) protocols include MAC, radio link control (RLC), packet data convergence protocol (PDCP), RRC and service data adaptation protocol (SDAP). The MAC protocol layer performs layer 2 packet filtering (e.g., at least for broadcast, if it is determined that the full identifier is not used in the L1 control information), SL carrier / resource (re)selection, SL HARQ transmission and SL processing without HARQ feedback, SL specific logical channel prioritization, SL scheduling request, SL buffer status report and UL / SL TX priority. The RRC protocol layer performs receiving resource pool configuration, SL radio bearer configuration, etc. from the network (such as gNB or core network control / data function), and exchanging UE capabilities and SL radio bearer configuration between UEs.

[0083] If multiple TX resource pools are configured / preconfigured, in LTE V2X communication, RRC selects a TX resource pool and provides the selected TX resource pool information to MAC, so MAC selects the actual resource within the indicated TX resource pool. However, this TX resource pool selection mechanism does not seem to be good in the newly designed NR V2X communication.

[0084] In one embodiment, MAC is provided to dynamically perform TX resource pool selection according to the result of LCP in the multiplexing and combining function. If RRC receives a plurality of configured / preconfigured TX resource pools, RRC divides them into TX resource pools including resources for HARQ feedback (such as HARQ acknowledgment (HARQ-ACK) or negative acknowledgment (HARQ-NACK)) information and TX resource pools not including resources for HARQ feedback information, and RRC provides the classified TX resource pool information to MAC.

[0085] Once MAC receives this information from RRC, MAC decides which SL logical channel has the highest priority and the packets (data / control) to be sent in the transmission buffer, which means that the candidate SL logical channels will be served first in the resources selected later. Therefore, if the SL logical channel with the packets to be sent with the highest priority is configured / pre-configured with HARQ feedback, MAC selects a TX resource pool from the TX resource pools that include resources for HARQ feedback information. Otherwise, if the SL logical channel with the packets to be sent with the highest priority is not configured / pre-configured with HARQ feedback, MAC selects a TX resource pool from the TX resource pools that do not include resources for HARQ feedback information.

[0086] If there are multiple SL logical channels with the same highest priority and there are packets to be sent in the transmission buffer, the MAC can randomly decide one from the multiple candidate SL logical channels. The MAC needs to perform this TX resource pool selection every time the SL logical channel with packets to be sent with the highest priority in the buffer changes, so this TX resource pool selection is performed in a dynamic manner, and the candidate logical channels are first served in the MAC protocol data unit (PDU) when resources are available.

[0087] In another embodiment, once the RRC classifies the configured / pre-configured TX resource pools into the TX resource pools including resources for the HARQ feedback information and the TX resource pools not including resources for the HARQ feedback information, the RRC is provided to select a TX resource pool from the TX resource pools including resources for the HARQ feedback information and the TX resource pools not including resources for the HARQ feedback information.

[0088] Then, the RRC provides only the selected TX resource pool (i.e., one TX resource pool with HARQ feedback channel resources and / or another TX resource pool without HARQ feedback channel resources) information to the MAC, and the MAC selects one from the above two based on the decision of the candidate logical channel to be served first (the decision criteria are the same as the first example of the embodiment). Please note that in both examples of the embodiment, if the RRC provides only the TX resource pool including resources for HARQ feedback information or the TX resource pool not including resources for HARQ feedback information to the MAC, the MAC does not need to look at the candidate logical channel to be served first when resources are available, but the MAC only selects one from the TX resource pools indicated by the RRC. In one example, the RRC selects a TX resource pool from the configured / pre-configured TX resource pools, and provides the selected TX resource pool with an indication to the MAC, indicating whether the selected TX resource pool includes HARQ feedback channel resources, and the MAC selects resources within the indicated TX resource pool. Figure 7 The UE behavior for the above examples and embodiments is shown.

[0089] Figure 7 A flowchart of a method 700 for TX resource pool selection of a UE according to an embodiment of the present disclosure is shown. Figure 7 The embodiment of method 700 shown in FIG. 7 is for illustration only. Figure 7 One or more components shown in the drawings may be implemented in dedicated circuits configured to perform the functions, or one or more components may be implemented by one or more processors executing instructions to perform the functions.

[0090] like Figure 7 As shown, RRC receives the TX resource pool and SL radio bearer configuration (including SL logical channel configuration) through one of SIB, pre-configuration or UE-specific RRC messages in step 701. In one example, the UE-specific RRC message is an RRC connection reconfiguration message. Then, in step 711, RRC classifies the configured / pre-configured TX resource pool into a TX resource pool including HARQ feedback channel resources and a TX resource pool not including HARQ feedback channel resources, and indicates the TX resources to MAC.

[0091] If there is SL data / control to be sent in the transmission buffer, the MAC selects a logical channel having data / control data to be sent with the highest priority, which is a candidate logical channel to be served first among multiple logical channels when resources are available, in steps 721 and 731. If there is no SL data / control data to be sent in the transmission buffer, the MAC continues to check in step 721, or when the TX resource pool and / or SL radio bearer configuration changes, for example, due to SIB update or new SIB acquisition from a serving cell change, etc., the RRC may perform the process of step 701 (e.g., steps 721 and 725).

[0092] If a candidate logical channel to be served first is selected in step 731, the MAC checks in step 741 whether the logical channel selected in step 731 is configured / preconfigured with HARQ feedback. In step 741, the check may be performed according to the corresponding SL radio bearer configuration and / or the corresponding logical channel configuration provided in step 701. If the selected logical channel is configured / preconfigured with HARQ feedback, the MAC (e.g., in step 751) selects a TX resource pool from the TX resource pool including HARQ feedback channel resources provided by the RRC in step 711.

[0093] If multiple TX resource pools including HARQ feedback channel resources are provided by RRC, MAC randomly selects one TX resource pool from the TX resource pools. If the selected logical channel is not configured / preconfigured with HARQ feedback, MAC (e.g., in step 761) selects a TX resource pool from the TX resource pool that does not include HARQ feedback channel resources provided by RRC in step 711. If multiple TX resource pools that do not include HARQ feedback channel resources are provided by RRC, MAC randomly selects one TX resource pool from the multiple TX resource pools.

[0094] Figure 8 A flow chart of a method 800 for sidelink measurement in V2X communication according to an embodiment of the present disclosure is shown. Figure 8 The embodiment of method 800 shown in FIG. 8 is for illustration only. Figure 8 One or more components shown in the embodiment may be implemented in a dedicated circuit configured to perform the functions, or one or more components may be implemented by one or more processors that execute instructions to perform the functions. Method 800 may be implemented by a UE (e.g., Figure 1 111) shown in .

[0095] like Figure 8 As shown, the method 800 starts at step 802. At step 802, the UE receives configuration information of a TX resource pool including at least one of the first group of resource pools or the second group of resource pools.

[0096] In one embodiment, the first set of resource pools includes resources for a HARQ feedback channel, and the second set of resource pools does not include resources for a HARQ feedback channel.

[0097] At step 804, the UE identifies a first group of resource pools and a second group of resource pools based on a HARQ feedback channel at the RRC sublayer.

[0098] In step 806, the UE selects a logical channel for transmitting SL data at the MAC sublayer, wherein the logical channel includes the highest priority among a plurality of logical channels using the LCP function.

[0099] At step 808, the UE determines at the MAC sublayer whether the logical channel is configured with a HARQ feedback channel.

[0100] At step 810, the UE selects a TX resource pool from the first group of resource pools based on a determination at the MAC sublayer that the logical channel is configured with a HARQ feedback channel.

[0101] In one embodiment, the TX resource pool is configured by a system information block (SIB); the TX resource pool is configured by a higher layer signal including a UE-specific RRC message; or the TX resource pool is configured by pre-configured information.

[0102] In step 812, the UE sends SL data based on the TX resource pool.

[0103] In one embodiment, the UE receives SL bearer configuration information including SL logical channel configuration information.

[0104] In one embodiment, the UE selects a logical channel based on an LCP function at the MAC sublayer, and the LCP function allocates a priority that determines the transmission order of SL data.

[0105] In one embodiment, the UE selects the TX resource pool from the second set of resource pools based on determining at the MAC sublayer that the logical channel is not configured with a HARQ feedback channel.

[0106] In one embodiment, the UE enables the RRC sublayer of the UE, classifies the TX resource pool into a first group of resource pools and a second group of resource pools at the RRC sublayer, and indicates from the RRC sublayer to the MAC sublayer of the UE that the first group of resource pools includes resources for the HARQ feedback channel and the second group of resource pools does not include resources for the HARQ feedback channel.

[0107] In one embodiment, the UE enables the MAC sublayer of the UE; selects a logical channel for sending SL data at the MAC sublayer; determines at the MAC sublayer whether the logical channel is configured with HARQ feedback; and selects a TX resource pool from a first group of resource pools at the MAC sublayer.

[0108] The above flow charts illustrate example methods that can be implemented according to the principles of the present disclosure, and various changes can be made to the methods illustrated in the flow charts herein. For example, although shown as a series of steps, the various steps in each figure can overlap, occur in parallel, occur in different orders, or occur multiple times. In another example, a step can be omitted or replaced by another step.

[0109] Although the present disclosure has been described with respect to exemplary embodiments, various changes and modifications may be proposed to those skilled in the art. The present disclosure is intended to include such changes and modifications that fall within the scope of the appended claims. Any description in this application should not be construed as implying that any particular element, step or function is an essential element that must be included within the scope of the claims. The scope of the patent subject matter is defined by the claims.

Claims

1. A method performed by a user equipment UE in a wireless communication system, the method comprising: Receive configuration information from a base station, the configuration information including first information about a side link SL transmit TX resource pool and second information about SL logical channel configuration; identifying, based on the second information, whether a logical channel with the highest priority according to the logical channel priority is configured with a hybrid automatic repeat request HARQ feedback; In a case where the logical channel with the highest priority is configured with the HARQ feedback, a medium access control MAC entity of the UE selects a SL TX resource pool configured with HARQ feedback channel resources from among the SL TX resource pools provided by a radio resource control RRC entity of the UE; and Based on the SL TX resource pool configured with the HARQ feedback channel resources, SL data is sent to another UE.

2. The method according to claim 1, wherein: The second information includes priority information of the logical channel and information indicating whether the HARQ feedback is configured for the logical channel.

3. The method according to claim 1, wherein: The configuration information is received via a system information block SIB.

4. The method according to claim 1, wherein: The configuration information is received via an RRC reconfiguration message dedicated to the UE.

5. A user equipment UE in a wireless communication system, the UE comprising: Transceiver; as well as at least one processor, the at least one processor being configured to: receiving configuration information from a base station via the transceiver, the configuration information comprising first information about a side link SL transmit TX resource pool and second information about SL logical channel configuration, identifying whether a logical channel with the highest priority according to the logical channel priority is configured with a hybrid automatic repeat request HARQ feedback based on the second information, In the case where the logical channel with the highest priority is configured with the HARQ feedback, a medium access control MAC entity of the UE selects a SL TX resource pool configured with HARQ feedback channel resources from among the SL TX resource pools provided by a radio resource control RRC entity of the UE, and The SL data is sent to another UE via the transceiver based on the SL TX resource pool configured with the HARQ feedback channel resources.

6. The UE according to claim 5, wherein: The second information includes priority information of the logical channel and information indicating whether the HARQ feedback is configured for the logical channel.

7. The UE according to claim 5, wherein: The configuration information is received via a system information block SIB.

8. The UE according to claim 5, wherein: The configuration information is received via an RRC reconfiguration message dedicated to the UE.

9. A method performed by a base station in a wireless communication system, the method comprising: Generate configuration information, the configuration information including first information about a side link SL transmit TX resource pool and second information about SL logical channel configuration; as well as Send the generated configuration information, Among them, when it is known according to the second information that the logical channel with the highest priority according to the logical channel priority of the user equipment UE is configured with hybrid automatic repeat request HARQ feedback, the SL TX resource pool configured with HARQ feedback channel resources among the SL TX resource pool provided by the radio resource control RRC entity of the UE is selected by the medium access control MAC entity of the UE for SL data transmission of the UE.

10. The method according to claim 9, wherein: The second information includes priority information of the logical channel and information indicating whether the HARQ feedback is configured for the logical channel.

11. The method according to claim 9, wherein: The configuration information is sent via a system information block SIB or an RRC reconfiguration message dedicated to the UE.

12. A base station in a wireless communication system, the base station comprising: Transceiver; as well as at least one processor, the at least one processor being configured to: generating configuration information, the configuration information comprising first information about a sidelink SL transmit TX resource pool and second information about SL logical channel configuration, and transmitting the generated configuration information via the transceiver, Among them, when it is known according to the second information that the logical channel with the highest priority according to the logical channel priority of the user equipment UE is configured with hybrid automatic repeat request HARQ feedback, the SL TX resource pool configured with HARQ feedback channel resources among the SL TX resource pool provided by the radio resource control RRC entity of the UE is selected by the medium access control MAC entity of the UE for SL data transmission of the UE.

13. The base station according to claim 12, wherein: The second information includes priority information of the logical channel and information indicating whether the HARQ feedback is configured for the logical channel.

14. The base station according to claim 12, wherein: The configuration information is sent via a system information block SIB.

15. The base station according to claim 12, wherein: The configuration information is sent via an RRC reconfiguration message dedicated to the UE.

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