Method and apparatus for reporting HARQ feedback information

Abstract

This first device may obtain the maximum number N of transmission failures that may occur within an interval, and / or the first device may generate hybrid automatic repeat request (HARQ) feedback information for a physical downlink shared channel candidate within the interval on the basis of the maximum number N of transmission failures, and / or the first device may transmit the HARQ feedback information to a second device.

Description

Method and device for reporting HARQ feedback information

[0001] The present disclosure relates to a wireless communication system.

[0002] 5G NR is a successor technology to LTE (long term evolution) and is a new clean-slate type mobile communication system with characteristics such as high performance, low latency, and high availability. 5G NR can utilize all available spectrum resources, ranging from low frequency bands below 1 GHz to mid-frequency bands from 1 GHz to 10 GHz, and high frequency (millimeter wave) bands above 24 GHz.

[0003] The 6G (wireless communication) system aims for (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) reduced energy consumption of battery-free IoT (internet of things) devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities. The vision of the 6G system can be in four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity, and the 6G system can satisfy requirements such as those shown in Table 1 below. For example, Table 1 may represent an example of the requirements for a 6G system.

[0004] Maximum data rate per device 1 Tbps E2E latency 1 ms Maximum spectral efficiency 100 bps / Hz Mobility support up to 1000 km / hr Satellite integration Fully AI Fully autonomous driving Fully XR Fully haptic communication Fully

[0005] According to one embodiment of the present disclosure, a method may be provided. For example, the method may include at least one of: a first device obtaining a maximum number of transmission failures N that may occur within a segment; a first device generating hybrid automatic repeat request (HARQ) feedback information for physical downlink shared channel candidates within the segment based on the maximum number of transmission failures N; and / or a first device transmitting the HARQ feedback information to a second device. For example, N may be a positive integer.

[0006] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: obtaining a maximum number of transmission failures N that may occur within a interval; generating HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the maximum number of transmission failures N; and / or transmitting the HARQ feedback information to a second device. For example, N may be a positive integer.

[0007] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause a first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: obtaining a maximum number of transmission failures N that may occur within a interval; generating HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the maximum number of transmission failures N; and / or transmitting the HARQ feedback information to a second device. For example, N may be a positive integer.

[0008] According to one embodiment of the present disclosure, a non-transient computer-readable storage medium recording instructions may be provided. For example, the instructions may cause a first device to perform an operation based on execution. For example, the operation may include at least one of: obtaining a maximum number of transmission failures N that may occur within a interval; generating HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the maximum number of transmission failures N; and / or transmitting the HARQ feedback information to a second device. For example, N may be a positive integer.

[0009] FIG. 1 illustrates a communication procedure between devices according to one embodiment of the present disclosure.

[0010] FIG. 2 shows a radio protocol architecture according to one embodiment of the present disclosure.

[0011] FIG. 3 shows the structure of a wireless frame according to one embodiment of the present disclosure.

[0012] FIG. 4 shows a slot structure of a frame according to one embodiment of the present disclosure.

[0013] FIG. 5 shows an example of a BWP according to one embodiment of the present disclosure.

[0014] FIG. 6 shows a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure.

[0015] FIG. 7 illustrates an example of a communication scenario based on a 6G system according to an embodiment of the present disclosure.

[0016] FIG. 8 illustrates a communication procedure between a first device and a second device according to one embodiment of the present disclosure.

[0017] FIG. 9 illustrates a procedure performed by a first device according to one embodiment of the present disclosure.

[0018] FIG. 10 illustrates a procedure performed by a second device according to one embodiment of the present disclosure.

[0019] FIG. 11 shows a communication system (1) according to one embodiment of the present disclosure.

[0020] FIG. 12 shows a wireless device according to one embodiment of the present disclosure.

[0021] FIG. 13 shows a signal processing circuit for a transmission signal according to one embodiment of the present disclosure.

[0022] FIG. 14 shows a wireless device according to one embodiment of the present disclosure.

[0023] FIG. 15 shows a portable device according to one embodiment of the present disclosure.

[0024] In the present disclosure, "A or B" may mean "only A," "only B," or "both A and B." Alternatively, in the present disclosure, "A or B" may be interpreted as "A and / or B." For example, in the present disclosure, "A, B or C" may mean "only A," "only B," "only C," or "any combination of A, B and C."

[0025] A slash ( / ) or a comma used in the present disclosure may mean "and / or." For example, "A / B" may mean "A and / or B." Accordingly, "A / B" may mean "only A," "only B," or "both A and B." For example, "A, B, C" may mean "A, B or C."

[0026] In the present disclosure, "at least one of A and B" may mean "only A," "only B," or "both A and B." Additionally, in the present disclosure, the expressions "at least one of A or B" or "at least one of A and / or B" may be interpreted as synonymous with "at least one of A and B."

[0027] Additionally, in the present disclosure, "at least one of A, B and C" may mean "only A," "only B," "only C," or "any combination of A, B and C." Additionally, "at least one of A, B or C" or "at least one of A, B and / or C" may mean "at least one of A, B and C."

[0028] Additionally, parentheses used in the present disclosure may mean "for example." Specifically, when indicated as "control information (PDCCH)," "PDCCH" may be proposed as an example of "control information." In other words, the "control information" of the present disclosure is not limited to "PDCCH," and "PDCCH" may be proposed as an example of "control information." Furthermore, even when indicated as "control information (i.e., PDCCH)," "PDCCH" may be proposed as an example of "control information."

[0029] In the following explanation, 'when, if, in case of' can be replaced with 'based on'.

[0030] Technical features described individually within one drawing in this disclosure may be implemented individually or simultaneously.

[0031] In the present disclosure, a higher layer parameter may be a parameter that is set for the terminal, pre-set, or pre-defined. For example, a base station or a network may transmit the higher layer parameter to the terminal. For example, the higher layer parameter may be transmitted via radio resource control (RRC) signaling or medium access control (MAC) signaling.

[0032] In the present disclosure, "configured or defined" may be interpreted as being configured or pre-configured to a device through pre-defined signaling from a base station or network (e.g., SIB, MAC, RRC, DCI (downlink control information), etc.). In the present disclosure, "configured or defined" may be interpreted as being configured or pre-configured to a device through pre-defined signaling from another device (e.g., MAC, RRC, SCI (sidelink control information), control information signaled between devices, etc.). In the present disclosure, "configured or defined" may be interpreted as being pre-configured to a device.

[0033] In the present disclosure, user equipment (UE) may refer to a device, a portable device, a wireless device, etc. In the present disclosure, a base station (BS) may refer to a radio access network (RAN) node, a non-terrestrial network (NTN) cell / node, a transmission reception point (TRP), a network, an integrated access and backhaul (IAB) node, a device, a portable device, a wireless device, etc.

[0034] The technology proposed in this disclosure can be used in various wireless communication systems such as CDMA (code division multiple access), FDMA (frequency division multiple access), TDMA (time division multiple access), OFDMA (orthogonal frequency division multiple access), and SC-FDMA (single carrier frequency division multiple access). CDMA can be implemented with wireless technologies such as UTRA (universal terrestrial radio access) or CDMA2000. TDMA can be implemented with wireless technologies such as GSM (global system for mobile communications) / GPRS (general packet radio service) / EDGE (enhanced data rates for GSM evolution). OFDMA can be implemented with wireless technologies such as IEEE (institute of electrical and electronics engineers) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, E-UTRA (evolved UTRA), LTE (long term evolution), and 5G NR.

[0035] The technology proposed in this disclosure can be implemented as 6G wireless technology and can be applied to various 6G systems. For example, 6G systems may have key factors such as eMBB (enhanced mobile broadband), URLLC (ultra-reliable low latency communications), mMTC (massive machine-type communication), AI (artificial intelligence) integrated communication, tactile internet, high throughput, high network capacity, high energy efficiency, low backhaul and access network congestion, and enhanced data security.

[0036] FIG. 1 illustrates a communication procedure between devices according to one embodiment of the present disclosure. The embodiment of FIG. 1 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of the embodiments may be omitted.

[0037] Referring to FIG. 1, in step S101, the first device and the second device can perform synchronization. For example, the first device may be a terminal and / or at least one of the devices proposed in the present disclosure. For example, the second device may be a base station, a network, a RAN node, an NTN node / cell, a TRP, a terminal and / or at least one of the devices proposed in the present disclosure. For example, the first device may perform an initial cell search operation. For example, the first device may detect at least one synchronization signal transmitted according to a rule predefined by the second device. Here, for example, the synchronization signal may include a plurality of synchronization signals (e.g., primary synchronization signal, secondary synchronization signal, etc.) classified according to structure or use. Through this, the first device can identify the boundaries of the frame, subframe, time unit, slot, and / or symbol of the second device, and the first device can obtain information about the second device (e.g., cell identifier).

[0038] In step S103, the first device may obtain system information transmitted by the second device. For example, the system information may include information related to the attributes, characteristics, and / or capabilities of the second device that are necessary to connect to the second device and use the service. For example, the system information may be classified according to content (e.g., whether it is essential for connection), transmission structure (e.g., the channel used, whether it is provided on-demand), etc. For example, the system information may be classified into a master information block (MIB) and a system information block (SIB). For example, if necessary, the first device may transmit a signal requesting the system information prior to receiving the system information. For example, the request and provision of the system information may be performed after a random access procedure described later.

[0039] In step S105, the first device and the second device may perform a random access procedure. For example, the first device may transmit and / or receive at least one message for the random access procedure (e.g., random access preamble, random access response message, etc.) based on information related to the random access channel of the second device obtained through system information (e.g., channel location, channel structure, structure of supported preamble, etc.). For example, the first device may transmit a preamble (e.g., Msg1) through the random access channel, and the first device may receive a random access response message (e.g., Msg2). The first device may transmit a message (e.g., Msg3) containing information related to the first device (e.g., identification information) to the second device using scheduling information included in the random access response message, and the first device may receive a message (e.g., Msg4) for contention resolution and / or connection establishment. For example, Msg1 and Msg3 can be transmitted and received as a single message (e.g., MsgA), and / or Msg2 and Msg4 can be transmitted and received as a single message (e.g., MsgB).

[0040] In step S107, the first device and the second device may perform signaling of control information. Here, for example, the control information may be defined in various layers, such as a layer controlling the connection (e.g., a radio resource control (RRC) layer), a layer handling mapping between a logical channel and a transmission channel (e.g., a media access control (MAC) layer), and a layer handling a physical channel (e.g., a physical (PHY) layer). For example, the first device and the second device may perform at least one of signaling to establish a connection, signaling to determine settings related to communication, and / or signaling to indicate allocated resources. For example, the control information may be signaled / transmitted through a control channel. For example, the control information and / or the control channel may be used to schedule at least one of data, a data channel (e.g., a shared channel), and / or control information on the data channel.

[0041] In step S109, the first device and the second device may transmit and / or receive data. For example, the first device and the second device may process data based on signaling of control information and transmit and / or receive it. For example, when transmitting data, the first device or the second device may perform at least one of channel encoding, rate matching, scrambling, constellation mapping, layer mapping, waveform modulation, antenna mapping, and / or resource mapping on the information bits. For example, when receiving data, the first device or the second device may perform at least one of signal extraction from resources, antenna-specific waveform demodulation, signal placement considering layer mapping, constellation demapping, descrambling, and / or channel decoding.

[0042] For example, the layers of the radio interface protocol between the first device and the second device can be classified into L1 (layer 1), L2 (layer 2), L3 (layer 3), etc. For example, the physical layer belonging to layer 1 can provide an information transfer service using a physical channel, and the radio resource control (RRC) layer located at layer 3 can perform the role of controlling radio resources between the first device and the second device. To this end, for example, the RRC layer can exchange RRC messages between the first device and the second device.

[0043] FIG. 2 illustrates a radio protocol architecture according to one embodiment of the present disclosure. The embodiment of FIG. 2 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of said embodiment may be omitted. For example, FIG. 2(a) may represent a radio protocol stack in the user plane for uplink communication or downlink communication, and FIG. 2(b) may represent a radio protocol stack in the control plane for uplink communication or downlink communication. For example, FIG. 2(c) may represent a radio protocol stack in the user plane for device-to-device communication, and FIG. 2(d) may represent a radio protocol stack in the control plane for device-to-device communication.

[0044] For example, the physical layer can provide information transmission services to upper layers using a physical channel. For example, the physical layer can be connected to the upper layer, the MAC (medium access control) layer, through a transport channel. For example, data can be transmitted between the MAC layer and the physical layer through a transport channel. For example, transport channels can be classified according to how and with what characteristics data is transmitted through a wireless interface. For example, data can be transmitted through a physical channel between different physical layers, e.g., between the physical layers of a first device and a second device. For example, the physical channel can be modulated using the OFDM (orthogonal frequency division multiplexing) method, and time and frequency can be utilized as wireless resources.

[0045] For example, the MAC layer can provide services to the upper layer, the RLC (radio link control) layer, through logical channels. For example, the MAC layer can provide mapping functions from multiple logical channels to multiple transmission channels. For example, the MAC layer can provide logical channel multiplexing functions through mapping from multiple logical channels to a single transmission channel. For example, the MAC sublayer can provide data transmission services over logical channels.

[0046] For example, the RLC layer can perform concatenation, segmentation, and reassembly of RLC service data units (SDUs). For example, to guarantee various quality of service (QoS) required by a radio bearer (RB), the RLC layer can provide three modes of operation: transparent mode (TM), unacknowledged mode (UM), and acknowledged mode (AM). For example, AM RLC can provide error correction through automatic repeat requests (ARQ).

[0047] For example, the RRC (radio resource control) layer may be defined only in the control plane. For example, the RRC layer may be responsible for controlling logical channels, transmission channels, and physical channels in relation to the configuration, reconfiguration, and release of radio bearers. For example, RB may refer to a logical path provided by the first layer (e.g., physical layer) and the second layer (e.g., MAC layer, RLC layer, PDCP (packet data convergence protocol) layer, SDAP (service data adaptation protocol) layer, etc.) for data transfer between a first device and a second device.

[0048] For example, the functions of the PDCP layer in the user plane may include the delivery of user data, header compression, and ciphering. For example, the functions of the PDCP layer in the control plane may include the delivery of control plane data and encryption / integrity protection.

[0049] For example, the establishment of an RB can mean the process of defining the characteristics of the wireless protocol layer and channel to provide specific services, and setting each specific parameter and method of operation. For example, an RB can be divided into two types: an SRB (signaling radio bearer) and a DRB (data radio bearer). For example, an SRB can be used as a channel to transmit RRC messages in the control plane, and a DRB can be used as a channel to transmit user data in the user plane.

[0050] For example, a downlink transmission channel may include at least one of a broadcast channel (BCH) that transmits system information and / or a shared channel (SCH) that transmits user traffic or control messages. For example, traffic or control messages for a downlink multicast or broadcast service may be transmitted via a downlink SCH or via a separate multicast channel (MCH). Meanwhile, an uplink transmission channel may include at least one of a random access channel (RACH) that transmits initial control messages and / or a shared channel (SCH) that transmits user traffic or control messages. For example, a logical channel located above the transmission channel and mapped to the transmission channel may include at least one of a broadcast control channel (BCCH), a paging control channel (PCCH), a common control channel (CCCH), a multicast control channel (MCCH), and / or a multicast traffic channel (MTCH).

[0051] FIG. 3 shows the structure of a wireless frame according to one embodiment of the present disclosure. The embodiment of FIG. 3 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0052] Referring to FIG. 3, radio frames may be used, for example, in uplink transmission, downlink transmission, and / or device-to-device transmission. For example, a radio frame may have a length of 10 ms and may be defined as two 5 ms half-frames (HF). For example, a half-frame may contain five 1 ms subframes (SF). For example, a subframe may be divided into one or more slots, and the number of slots within a subframe may be determined by subcarrier spacing (SCS). For example, each slot may contain 12 or 14 OFDM(A) symbols according to a cyclic prefix (CP).

[0053] For example, when normal CP is used, each slot may contain 14 symbols. For example, when extended CP is used, each slot may contain 12 symbols. Here, for example, the symbols may include OFDM symbols (or CP-OFDM symbols) and SC-FDMA (single carrier-FDMA) symbols (or DFT-s-OFDM (Discrete Fourier Transform-spread-OFDM) symbols).

[0054] Table 2 below shows the number of symbols per slot (N) according to the SCS setting (u) when Normal CP or Extended CP is used. slot symb ), number of slots per frame (N frame,u slot ) and the number of slots per subframe (N subframe,u slot) exemplifies.

[0055] CP Type SCS (15*2 u )N slot symb N frame,u slot N subframe,u slot Normal CP 15kHz (u=0) 1410 130kHz (u=1) 1420 260kHz (u=2) 1440 4120kHz (u=3) 1480 8240kHz (u=4) 14160 16 Extended CP 60kHz (u=2) 1240 4

[0056] For example, OFDM(A) numerology (e.g., SCS, CP length, etc.) may be configured differently among multiple cells merged into a single terminal. Accordingly, the (absolute time) interval of a time resource (e.g., subframe, slot, or TTI (transmit time interval)) composed of the same number of symbols may be configured differently among the merged cells. For example, in the present disclosure, time resources such as subframes, slots, TTI, etc. may be referred to as time units.

[0057] For example, multiple numerologies or SCSs may be supported to support various services. For example, if the SCS is 15 kHz, a wide area in traditional cellular bands may be supported, and if the SCS is 30 kHz / 60 kHz, dense-urban, lower latency, and wider carrier bandwidth may be supported. For example, if the SCS is 60 kHz or higher, a bandwidth greater than 24.25 GHz may be supported to overcome phase noise.

[0058] FIG. 4 shows a slot structure of a frame according to one embodiment of the present disclosure. The embodiment of FIG. 4 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of the embodiments may be omitted.

[0059] Referring to FIG. 4, for example, a slot may include multiple symbols in the time domain. For example, a carrier may include multiple subcarriers in the frequency domain. For example, a resource block (RB) may be defined as multiple consecutive subcarriers in the frequency domain. For example, a bandwidth part (BWP) may be defined as multiple consecutive (P)RBs ((physical) resource blocks) in the frequency domain and may correspond to a single numerology (e.g., SCS, CP length, etc.). For example, a carrier may include up to N BWPs (where N is a positive integer). For example, data communication may be performed through an active BWP. For example, each element may be referred to as a resource element (RE) in a resource grid and may be mapped to a single complex symbol.

[0060] For example, a BWP can be a continuous set of PRBs in a given numerology. For example, a PRB can be selected from a continuous subset of common resource blocks (CRBs) for a given numerology on a given carrier.

[0061] For example, the BWP may be at least one of an active BWP, an initial BWP, and / or a default BWP. For example, the terminal may not monitor downlink radio link quality on DL BWPs other than the active DL BWP on the PCell (primary cell). For example, the terminal may not receive PDCCH (physical downlink control channel), PDSCH (physical downlink shared channel), or CSI-RS (channel state information-reference signal) (except for RRM (radio resource management)) outside of the active DL BWP. For example, the terminal may not trigger CSI (channel state information) reporting for an inactive DL BWP. For example, the terminal may not transmit PUCCH (physical uplink control channel) or PUSCH (physical uplink shared channel) outside of the active UL (uplink) BWP. For example, for the downlink, the initial BWP can be given as a consecutive set of resource blocks (RBs) for the remaining minimum system information (RMSI) CORESET (control resource set) (set by the physical broadcast channel (PBCH)). For example, for the uplink, the initial BWP can be given by the system information block (SIB) for the random access procedure. For example, the default BWP can be set by the upper layer. For example, the initial value of the default BWP can be the initial DL BWP.For energy saving, if the terminal fails to detect DCI (downlink control information) for a certain period, the terminal can switch the active BWP of the terminal to the default BWP.

[0062] FIG. 5 illustrates an example of a BWP according to an embodiment of the present disclosure. The embodiment of FIG. 5 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted. In the embodiment of FIG. 5, it is assumed that there are three BWPs.

[0063] Referring to FIG. 5, for example, a common resource block (CRB) may be a numbered carrier resource block from one end of the carrier band to the other, and a PRB may be a numbered resource block within each BWP. For example, point A may indicate a common reference point for the resource block grid.

[0064] For example, BWP is point A, offset from point A (N start BWP ) and bandwidth (N size BWP It can be set by ). For example, point A may be an external reference point of the PRB of a carrier where the subcarrier 0 of all numerologies (e.g., all numerologies supported by the network in that carrier) are aligned. For example, offset may be the PRB interval between the lowest subcarrier in a given numerology and point A. For example, bandwidth may be the number of PRBs in a given numerology.

[0065] FIG. 6 illustrates a communication structure that can be provided in a 6G system according to one embodiment of the present disclosure. The embodiment of FIG. 6 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of said embodiments may be omitted.

[0066] As core implementation technologies for 6G systems, technologies such as artificial intelligence (AI), THz (Terahertz) communication, optical wireless technology, free space optical transmission (FSO) backhaul networks, large-scale MIMO (multiple input multiple output) technology, blockchain, 3D networking, quantum communication, unmanned aerial vehicles, cell-free communication, wireless information and energy transfer (WIET), integration of sensing and communication, integration of access backhaul networks, holographic beamforming, big data analysis, and large intelligent surface (LIS) can be adopted.

[0067] - Artificial Intelligence: Introducing AI into communications can streamline and enhance real-time data transmission. AI can determine how complex target tasks are performed using numerous analyses. For example, AI can increase efficiency and reduce processing latency. Time-consuming tasks such as handover, network selection, and resource scheduling can be performed instantly using AI. AI can also play a significant role in M2M, machine-to-human, and human-to-machine communication. Furthermore, AI can enable rapid communication in Brain-Computer Interfaces (BCI). AI-based communication systems can be supported by metamaterials, intelligent structures, intelligent networks, intelligent devices, intelligent cognitive radios, self-sustaining wireless networks, and machine learning.

[0068] - THz Communication: Data transmission rates can be increased by expanding bandwidth. This can be achieved by using sub-THz communication with wide bandwidth and applying advanced large-scale MIMO technology. THz waves, also known as sub-millimeter radiation, generally refer to a frequency band between 0.1 THz and 10 THz with corresponding wavelengths ranging from 0.03 mm to 3 mm. The 100 GHz-300 GHz band range (Sub-THz band) is considered the primary portion of the THz band for cellular communication. Adding the Sub-THz band to the mmWave band increases 6G cellular communication capacity. Among the defined THz bands, the 300 GHz-3 THz band is located in the far-infrared (IR) frequency band. Although the 300 GHz-3 THz band is part of the optical band, it lies at the boundary of the optical band and immediately following the RF band. Therefore, this 300 GHz-3 THz band exhibits similarities to RF. Key characteristics of THz communication include (i) widely available bandwidth to support very high data transmission rates, and (ii) high path loss occurring at high frequencies (highly directional antennas are indispensable). The narrow beam width generated by highly directional antennas reduces interference. The small wavelength of THz signals allows a much larger number of antenna elements to be integrated into devices and BSs operating in this band. This enables the use of advanced adaptive array technologies that can overcome range limitations.

[0069] - Large-scale MIMO technology

[0070] - Hologram beamforming (HBF)

[0071] - Optical wireless technology

[0072] - Free Space Optical Transmission Backhaul Network (FSO backhaul network)

[0073] - Quantum communication

[0074] - Cell-free communication

[0075] - Integration of wireless information and power transmission

[0076] - Integration of wireless communication and sensing

[0077] - Integrated access and backhaul network

[0078] - Big data analysis

[0079] - Reconfigurable intelligent metasurface

[0080] - Metaverse

[0081] - blockchain

[0082] - Advanced Air Mobility (AAM): AAM can be a broad concept encompassing Urban Air Mobility (UAM), Regional Air Mobility (RAM), and Uncrewed Aerial Systems (UAS). For example, AAM may include UAM, RAM, UAS, and UAVs (uncrewed aerial vehicles).

[0083] - Autonomous driving (self-driving): V2X (vehicle to everything), a core element of building autonomous driving infrastructure, refers to technologies that enable vehicles to communicate and share with various elements on the road to perform autonomous driving, such as wireless communication between vehicles (vehicle to vehicle, V2V) and between vehicles and infrastructure (vehicle to infrastructure, V2I).

[0084] - Non-terrestrial Network (NTN): An NTN may refer to a network or network segment that utilizes RF (radio frequency) resources mounted on a satellite (or UAS platform). The use of NTN services may be considered to secure wider coverage or to provide wireless communication services in locations where the installation of wireless communication base stations is difficult.

[0085] - Integrated Sensing and Communication (ISAC): Wireless sensing is a technology that uses radio frequencies to determine the instantaneous linear velocity, angle, distance (range), etc., of an object, thereby obtaining information about the characteristics of the environment and / or objects within the environment.

[0086] - Reconfigurable Intelligent Surface (RIS): An RIS can be used to manipulate and enhance signal propagation in a wireless communication environment. For example, an RIS can be composed of many small antennas or metasurfaces arranged on a surface, each of which can actively control the phase, amplitude, polarization, etc., of the reflected signal. For instance, an RIS can improve signal reception by controlling the path, phase, and / or strength of the propagating signal. For instance, power consumption can be very low because power is consumed only for controlling the phase and amplitude of the small antennas. For instance, since an RIS can be reconfigured to suit various environments, it can meet diverse communication requirements and operate effectively in dynamic network environments.

[0087] FIG. 7 illustrates an example of a communication scenario based on a 6G system according to an embodiment of the present disclosure. The embodiment of FIG. 7 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted.

[0088] Referring to FIG. 7, NTN communication can be performed based on a satellite network, HIBS (high-altitude platform stations (HAPS) as international mobile telecommunications (IMT) base stations (BS)), and an aeronautical communication-capable terminal (e.g., AAM). For example, to improve coverage, devices such as a satellite network, HIBS, and an aeronautical communication-capable terminal (e.g., AAM) can act as relays. For example, an AAM can communicate with a base station, a satellite network, etc., and / or an AAM can communicate directly with a terminal, another AAM, etc.

[0089] Meanwhile, the size of the conventional Type-1 HARQ (hybrid automatic repeat request)-ACK (acknowledgement) codebook can be very large, depending not only on the transmitted PDSCH and PUCCH scheduling but also on the time domain resource configuration of the scheduleable PDSCH and the slot offset between the scheduleable PUCCH and PDSCH. To address this problem, a Type-2 HARQ-ACK codebook with a size that varies depending on the dynamic scheduling situation or a Type-3 HARQ-ACK codebook with a size based on the maximum HARQ process can be utilized; however, these types of HARQ-ACK codebooks may cause issues in tracking the HARQ process status due to the failure to receive the scheduling DCI. Furthermore, even with other types of HARQ-ACK codebooks, the size of the HARQ-ACK codebook and the UCI multiplexed with it can grow indefinitely depending on the number of cell configurations and schedulings received by the terminal, as well as the multiplexing of other UCI (uplink control information) transmissions. Considering the HARQ-ACK retransmission and HARQ-ACK delayed transmission introduced in Rel-18, the actual size of the HARQ-ACK codebook transmission can be several times the size of a single HARQ-ACK codebook.

[0090] A large HARQ-ACK codebook or a large UCI multiplexed with a HARQ-ACK codebook may require large resources to ensure the reliability of PUCCH transmission. Depending on uplink channel conditions and PUCCH resource configuration, it may always be difficult to allocate appropriate resources, and even when appropriate PUCCH resources are allocated, the side effects that may occur when a large HARQ-ACK codebook is lost may be greater than when a small HARQ-ACK codebook is lost. For example, in the case of a HARQ-ACK codebook transmitting 5 received results, up to 5 retransmissions may be required if the codebook transmission fails, whereas in the case of transmitting a HARQ-ACK codebook transmitting 16 transmissions, up to 16 retransmissions may be required.

[0091] Accordingly, the present disclosure proposes a method for maximally compressing the size of a HARQ-ACK codebook transmitted by a terminal through configured information, various types of HARQ-ACK codebooks, a method for compressing information when multiple HARQ-ACK codebooks are multiplexed into a single PUCCH, a method for determining PUCCH resources by considering the included HARQ-ACK codebooks, and an apparatus supporting the same. Through this, the size of the HARQ-ACK codebook can be adjusted, and the reliability and resource efficiency of PUCCH transmission can be ensured.

[0092] In this disclosure, a general procedure for the efficient management of HARQ-ACK codebooks and the optimization of PUCCH resources may be proposed. For example, this may be intended to address the inefficiency and reliability issues regarding PUCCH resource utilization caused by the increase in the size of existing HARQ-ACK codebooks. For instance, by dynamically compressing the HARQ-ACK codebook and determining PUCCH resources, there is an advantage of being able to flexibly respond to various service requirements along with the efficient utilization of system resources.

[0093] FIG. 8 illustrates a communication procedure between a first device and a second device according to an embodiment of the present disclosure. The embodiment of FIG. 8 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, proposals, methods, and / or operations of the embodiments may be omitted. In the embodiment of FIG. 8, for convenience of explanation, the first device may be referred to as a terminal and the second device may be referred to as a base station. However, the embodiments of the present disclosure may be applied not only to communication procedures between a terminal and a base station but also to communication procedures between various devices.

[0094] In step S810, for example, the terminal may report to the base station a list and combination of supported HARQ-ACK codebook compression schemes, supported HARQ-ACK codebook types, and / or supported PUCCH resources. For example, this is a process of informing the base station of the terminal's capabilities, which can enable the base station to allocate appropriate resources corresponding to the terminal's capabilities. For example, step S810 may be omitted.

[0095] In step S820, for example, the base station may set available HARQ-ACK codebook compression schemes, available HARQ-ACK codebook types, and / or a list of available PUCCH resources for the terminal. For example, this can be determined by the base station in consideration of the capabilities reported by the terminal and the network conditions, thereby enabling efficient resource management. For example, if step S810 is omitted, the base station may set available HARQ-ACK codebook compression schemes, available HARQ-ACK codebook types, and / or a list of available PUCCH resources for the terminal without considering the terminal capabilities. For example, the base station may instruct the terminal on the HARQ-ACK codebook compression scheme and / or the HARQ-ACK codebook type to be used. For example, this can be done dynamically and can be flexibly changed according to the network conditions and service requirements.

[0096] In step S830, for example, the terminal may compress and / or generate HARQ-ACK information according to a specified HARQ-ACK codebook compression method and / or a specified HARQ-ACK codebook type. For example, in this process, the terminal may consider cases where various types of HARQ-ACK codebooks and multiple HARQ-ACK codebooks are multiplexed into a single PUCCH. For example, the terminal may select an appropriate PUCCH resource for transmitting the compressed and / or generated HARQ-ACK information. For example, in this selection process, the terminal may consider a list of PUCCH resources set by the base station, the current HARQ-ACK codebook size, and / or a specified PUCCH resource identifier. For example, the terminal may transmit the compressed and / or generated HARQ-ACK information using the selected PUCCH resource. For example, multiplexing with another UCI may be considered in this process.

[0097] Through these general procedures, problems caused by the increase in the size of existing HARQ-ACK codebooks can be resolved, and dynamic and flexible HARQ-ACK codebook compression and / or generation, as well as PUCCH resource management, can be enabled. This can provide the advantage of efficient utilization of system resources and the ability to flexibly respond to various service requirements.

[0098] The method proposed in this disclosure may be applied by selecting some of the following methods. Each method may operate independently without separate combination, or one or more methods may operate in a combined and linked form. Some terms, symbols, sequences, etc. used for illustrative purposes may be replaced with other terms, symbols, sequences, etc.

[0099] The method proposed in this disclosure may be applied only when the terminal receives relevant configuration information from a base station (or core network). In this case, for example, a higher-layer signal (e.g., SIB or RRC signaling) may be used for said configuration information, or a method in which the activation / deactivation of the configured information is indicated via a separate signaling (e.g., DCI or MAC) may be used in conjunction. Additionally, for example, the terminal may report information (e.g., capability) regarding the availability of support for the proposed method, and the base station (or core network) may receive this.

[0100] I. Proposal 1: HACK Codebook Compression

[0101] For example, the HARQ-ACK codebook compression method may be related to the Type-1 HARQ codebook compression method.

[0102] For example, in the case of Type-1, one of multiple candidate K1 / TDRA (time domain resource allocation) / cell (actually scheduled / received) may be designated, and a CB (codebook) may be configured and transmitted only for that subset. Through this, size can be saved.

[0103] For example, the terminal may transmit only the HARQ-ACK codebook for a specific K1 (PDSCH-to-PUCCH slot offset) value, a specific TDRA, and / or a specific cell among the PDSCH receptions actually scheduled to transmit a HARQ-ACK in a certain slot. To do this, for example, the MSB (most significant bit) or LSB (least significant bit) of the HARQ-ACK codebook may contain the K1 value index, the TDRA row index, and / or the cell index. For example, the terminal may select one K1 / TDRA / cell to transmit via the codebook, and the terminal may construct and transmit the corresponding HARQ-ACK codebook. For example, to select one K1 / TDRA / cell to be used for HARQ-ACK transmission, the terminal may use the following method.

[0104] For example, a terminal may select a K1 / TDRA or cell containing a PDSCH that failed to be received. If there are multiple such K1 / TDRAs or cells, the terminal may construct a codebook for all of them or select a K1 / TDRA or cell with many failed PDSCHs. For example, in such a case, the base station may assume that all transmissions of the untransmitted K1 / TDRAs or cells were successful.

[0105] For example, a range or subset (actually scheduled / received) of multiple candidate K1 / TDRA / cells may be indicated, and CBs may be configured and transmitted only for that subset. In this case, for example, the following method may be used to indicate the range of K1 / TDRA / cells.

[0106] For example, the base station may pre-configure one or more ranges of K1 / TDRA / cells to be used. For example, this may limit the K1 / TDRA / cells that are multiplexed to a single PUCCH simultaneously to a specific range. For example, if sets A and B of TDRA rows are configured, the terminal may assume that all PDSCHs associated with HARQ-ACKs included in a single PUCCH are scheduled to TDRAs belonging to set A, or all are scheduled to TDRAs belonging to set B. In such a case, for example, the terminal may construct a HARQ-ACK codebook based on a given set of K1, TDRA, or cells and transmit a PUCCH / PUSCH. Alternatively, for example, the range of K1 / TDRA / cells to be used for HARQ-ACK transmission may be indicated along with the scheduling message.

[0107] For example, the terminal may transmit a HARQ-ACK codebook along with an indicator specifying one of the pre-configured K1 / TDRA / cell ranges. For example, the K1 / TDRA / cell range may be specified in advance through the base station's upper layer signaling.

[0108] According to one embodiment of the present disclosure, a Type-1 HARQ-ACK codebook compression method may be as follows.

[0109] 1. A step of specifying one of a plurality of candidate K1 (PDSCH-to-PUCCH slot offset) / TDRA (time domain resource allocation) / cell to construct and transmit a codebook only for the corresponding subset; or

[0110] 2. A step of specifying a range or subset of multiple candidate K1 / TDRA / cells to construct and transmit a codebook only for the said subset, wherein the following methods may be used:

[0111] a) A method for a base station to pre-set one or more ranges of K1 / TDRA / cells to be used

[0112] b) A method in which a terminal transmits a HARQ-ACK codebook along with an indicator indicating one of the pre-set K1 / TDRA / cell ranges.

[0113] 3. In the above step, the terminal transmits only the HARQ-ACK codebook for a specific K1 value, a specific TDRA, and / or a specific cell among the actually scheduled or received PDSCH;

[0114] 4. As a step of selecting one K1 / TDRA / cell to be transmitted by the terminal, one of the following methods may be used:

[0115] a) How to select a K1 / TDRA or cell containing a PDSCH that failed to be received

[0116] b) If there are multiple PDSCHs that failed to be received, a method to construct a codebook for the entire group or to select the K1 / TDRA or cell with the most failed PDSCHs.

[0117] 5. As a step for indicating the number of PDSCHs for a specific K1 value, the following method may be used:

[0118] a) Method 1: A method of indicating the presence or absence of a single PDSCH with 1 bit for each K1 value

[0119] b) Method 2: A method of allocating up to N PDSCHs per K1 and having the terminal construct a HARQ-ACK codebook corresponding to the N PDSCHs.

[0120] c) The above N can be set by upper layer signaling of the base station, and at least when N is not 1, the terminal can expect up to N PDSCHs in the slot.

[0121] d) When N is not 1, and the number of PDSCHs that can be transmitted simultaneously, K, is greater than N, the terminal may not be able to determine the HARQ-ACK corresponding to the received PDSCH. To address this, for example, when the number of multiple PDSCHs that can be transmitted simultaneously is greater than N, the K PDSCH candidate groups that can be transmitted simultaneously are divided again into N HARQ-ACK transmission bit groups, and the terminal may assume that two PDSCHs are not transmitted in one HARQ-ACK transmission bit group. Specifically, for example, the terminal may assume that up to 7 PDSCHs can be transmitted in the corresponding slot through the given TDRA and TDD settings. In this case, for example, PDSCH candidate groups that cannot be transmitted simultaneously due to temporal overlap may constitute a single PDSCH candidate group. To this end, for example, in conventional standards, a single PDSCH candidate whose end of the TDRA is located earliest can be selected, and a PDSCH candidate group can be formed by grouping that PDSCH candidate and any overlapping PDSCH candidates, and this can be repeated until all PDSCH candidates are included in a single PDSCH candidate group. For example, when K PDSCH candidate groups that can be transmitted simultaneously are formed in this way, they can be divided again into N HARQ-ACK transmission bit groups, and the terminal can assume that two PDSCHs are not transmitted in one HARQ-ACK transmission bit group.

[0122] 6. As a method for transmitting the above-mentioned information, the following method may be used:

[0123] a) Method 1: A method in which the base station includes and transmits in a scheduling message

[0124] b) Method 2: A method in which the terminal transmits the relevant information in the form of a separately encoded indicator.

[0125] As a specific example of Method 2, the MSB (most significant bit) or LSB (least significant bit) of the HARQ-ACK codebook may contain the K1 value index, TDRA row index and / or cell index.

[0126] c) This may be limited to cases where UCI (uplink control information) is transmitted via PUSCH (physical uplink shared channel).

[0127] d) Or a separate PUCCH resource may be used for this purpose. For example, in the first PUCCH transmission, information indicating a range or subset of the proposed plurality of candidate K1 / TDRA / cells may be transmitted, and in the second PUCCH transmission, a HARQ-ACK codebook based on said information may be transmitted.

[0128] For example, the cell is fixed to all available CA (carrier aggregation) cells, and multiple K1 subsets are pre-configured only for K1, and then one K1 subset can be indicated via DCI (downlink control information), and the terminal can configure a Type-1 codebook only for that K1 subset.

[0129] For example, K1 is fixed to all K1 values, and multiple cell subsets are pre-configured only for the cells, and then one cell subset can be indicated via DCI, and the terminal can configure a Type-1 codebook only for that cell subset.

[0130] For example, after pre-configuring multiple combinations of {K1 subset, cell subset} for a cell and K1, one combination may be indicated via DCI, and the terminal may configure a Type-1 codebook only for that combination.

[0131] For example, in this case, multiple K1 / cell subsets may be separated from each other, partially overlap, or be subsets of each other, and at least one of the multiple K1 / cell subsets may consist of all K1 / cells.

[0132] According to the present disclosure, the size of the HARQ-ACK codebook can be effectively reduced, enabling efficient use of wireless resources and reducing the power consumption of the terminal.

[0133] II. Proposal 1-1: HARQ-ACK codebook compression with HARQ-ACK codebook other than type 1

[0134] For example, the method of the terminal transmitting HARQ-ACK CB compressed information via PUCCH or PUSCH can be applied not only to Type-1 but also to Type-2 and Type-3.

[0135] For example, in the case of Type-2, the terminal can transmit the last (counter) DAI (downlink assignment index) value it received.

[0136] For example, in the case of Type-3, (different multiple cell subsets and / or HPN (HARQ-ACK payload number) subsets (combinations) may be set in advance as multiple candidate Type-3 indices) and the terminal may transmit a Type-3 index corresponding to the combination of cell / HPN transmitted in the received PDSCHs.

[0137] III. Proposal 2: A New Type of HARQ-ACK Codebook

[0138] For example, a new type of HARQ-ACK codebook may be proposed. For instance, the method of constructing the codebook may be suitable, particularly when performing high-reliability transmissions. For instance, in the case of the new type of HARQ-ACK codebook, effective HARQ-ACK feedback can be enabled while maintaining the codebook size below a certain limit.

[0139] For example, when performing high-reliability transmissions, the resources used for transmission are large and the error rate is very low; therefore, even when multiple HARQ-ACKs are transmitted, actual transmissions may succeed and transmission failures may be rare. In such cases, methods such as a Type-2 HARQ-ACK codebook based on the actual number of transmissions can be considered, but in such cases, the size of the HARQ-ACK codebook varies depending on the number of base station scheduling cycles, etc. In the present disclosure, the size of the codebook is determined based on semi-statically set information so that the size of the codebook can be fixed prior to scheduling, but a new codebook is proposed in which the size of the codebook is kept below a certain size.

[0140] For example, in the proposed codebook, the maximum number of transmission failures N that may occur within a codebook interval can be determined in advance. For example, N may be a predetermined value or may be determined through the upper layer signaling of the base station or the L1 signaling of the terminal.

[0141] For example, the number of transmission failures that may occur at specific slot intervals X or at specific slot intervals in a single PUCCH can be determined in advance.

[0142] For example, the number of transmission failures that may occur between specific TDRA rows or among specific TDRA rows in a single PUCCH can be determined in advance.

[0143] For example, the number of transmission failures that may occur per cell or in a specific cell within a single PUCCH can be determined in advance.

[0144] For example, the number of transmission failures that may occur in all M(A,c) occasions in the HARQ-ACK codebook can be determined in advance. For example, the number of transmission failures that may occur in one or more groups of M(A,c) occasions in the HARQ-ACK codebook can be determined in advance.

[0145] For example, the number of transmission failures that may occur in X consecutive M(A,c) opportunities in the HARQ-ACK codebook can be determined in advance. For example, the number of transmission failures that may occur in one or more groups of M(A,c) opportunities in the HARQ-ACK codebook can be determined in advance.

[0146] For example, the number of transmission failures that may occur for each PDSCH scheduling corresponding to X consecutive DAIs in a Type-2 HARQ-ACK codebook can be determined in advance.

[0147] For example, the number of transmission failures that may occur for each PDSCH scheduling corresponding to X consecutive HARQ processes in a Type-3 HARQ-ACK codebook can be determined in advance.

[0148] For example, the above X may be predefined, indicated via L1 signaling of the base station, and / or set via upper layer signaling.

[0149] For example, the terminal can generate and transmit HARQ-ACK bits as follows in a section where the number of maximum transmission failures is determined.

[0150] 1. The terminal can transmit up to N PDSCH candidate indices that failed to receive among M PDSCH candidates in the interval.

[0151] 2. In cases where multiple M transport blocks (TBs) can occur from a single PDSCH candidate, the terminal may add (M-1) bits for each index, for a total of N*(M-1) bits. For example, the M-1 bits may correspond to each transmission result from the second TB to the Mth TB. For example, the number of PDSCH candidates M within a interval and the number of TBs M that can occur from a single PDSCH candidate may be different. For example, the number of PDSCH candidates M within a interval and the number of TBs M that can occur from a single PDSCH candidate may be the same.

[0152] 3. When transmitting the first PDSCH candidate index, a virtual PDSCH candidate index may be included indicating success of all transmissions or N or more transmission failures.

[0153] 4. One or more PDSCH candidate indices may be considered for joint encoding and transmission as a single index. For example, the following method may be considered to transmit two PDSCH candidate indices.

[0154] A. A table can be constructed to map combinations of {a_1, a_2, ..., a_N} (a_i < a_j where i < j, 0 ≤ a_n < M for 1 ≤ n ≤ N) to integer values.

[0155] B. When transmitting 2 PDSCH candidate indices a_1 and a_2, the following methods may be used.

[0156] - If a_1 ≤ M / 2, (M - 1) × a_1 + a_2 - a_1 - 1

[0157] - If a_1 > M / 2, (M - 1) × (M - 1 - a_1) + (M - a_2 + a_1)

[0158] A method for configuring a HARQ-ACK codebook according to one embodiment of the present disclosure may be as follows:

[0159] 1. A step of determining in advance the maximum number of possible transmission failures N within a codebook interval;

[0160] a) The above N is a predetermined value or can be determined through upper layer signaling of the base station or L1 signaling of the terminal.

[0161] 2. Step to set the determination range of N to one of the following:

[0162] a) The number of possible transmission failures that can occur at specific slot intervals or in specific slot intervals within a single PUCCH

[0163] b) The number of possible transmission failures between specific TDRA (time domain resource allocation) rows or specific TDRA row groups within a single PUCCH

[0164] c) Number of possible transmission failures per cell or in a specific cell within a single PUCCH

[0165] d) Number of possible transmission failures for each consecutive M(A,c) opportunity in the HARQ-ACK codebook

[0166] e) Number of possible transmission failures in one or more M(A,c) chance groups in the HARQ-ACK codebook

[0167] f) Number of possible transmission failures for each PDSCH scheduling corresponding to X consecutive DAIs in the Type-2 HARQ-ACK codebook

[0168] g) The number of possible transmission failures for each PDSCH scheduling corresponding to X consecutive HARQ processes in the Type-3 HARQ-ACK codebook

[0169] 3. A step in which the terminal generates and transmits a HARQ-ACK bit in a section where the maximum number of transmission failures is determined, and may include the following method:

[0170] a) Transmit up to N PDSCH candidate indices that failed to receive among the M PDSCH (physical downlink shared channel) candidates in the corresponding section

[0171] b) In cases where multiple M transmission blocks can occur from a single PDSCH candidate,

[0172] b-1) (M-1) bits may be added for each index, resulting in a total of N*(M-1) bits. For example, HARQ feedback information may include the indices of N physical downlink shared channel candidates for which reception failure was detected and N*(M-1) bits. For example, M may be a positive integer. For example, the (M-1) bits associated with each index may indicate the success or failure of the remaining transmission blocks within that candidate, excluding the first transmission block. For example, the status of the first transmission block may be implicitly represented by whether it is included in the index.

[0173] b-2) M bits may be added for each index, resulting in a total of N*(M) bits. For example, HARQ feedback information may include the indices of N physical downlink shared channel candidates for which reception failures were detected, along with N*M bits. For instance, the M bits associated with each index may explicitly indicate the success or failure of all transmission blocks within that candidate (e.g., including the first transmission block). For instance, this method can clearly report the status of all transmission blocks, but the number of feedback bits may increase.

[0174] b-3) Based on M transmission blocks being allowed in a single physical downlink shared channel candidate and each transmission block being composed of G code block groups (CBGs), the HARQ feedback information may include the indices of K physical downlink shared channel candidates where reception failures were detected and N*M*G bits. For example, the M*G bits associated with each index may indicate the success or failure of each CBG for all transmission blocks within that candidate. For example, this method allows for granular retransmission control, but the number of feedback bits may increase significantly. For example, this method may also be applicable when a single transmission block in a single PDSCH candidate is composed of G code block groups. For example, M may be an integer greater than or equal to 1.

[0175] c) When transmitting the first PDSCH candidate index, a virtual PDSCH candidate index may be included indicating the success of all transmissions or N or more transmission failures.

[0176] d) Consider a method to co-encode one or more PDSCH candidate indexes and transmit them as a single index.

[0177] 4. The following methods can be used as co-encoding methods for PDSCH candidate indices:

[0178] a) Construct a table that maps combinations of {a_1, a_2, ..., a_N} (integers such that a_i < a_j, i < j, 0 ≤ a_n < M, and 1 ≤ n ≤ N) to integer values

[0179] b) When transmitting 2 PDSCH candidate indices a_1 and a_2:

[0180] - For a_1 ≤ M / 2: (M - 1) × a_1 + a_2 - a_1 - 1

[0181] - For a_1 > M / 2: (M - 1) × (M - 1 - a_1) + (M - a_2 + a_1)

[0182] 5. A step of grouping all M PDSCHs into K groups, indexing PDSCH opportunities for each group, and adopting a structure that indicates a PDSCH index of NACK (negative acknowledgment) for each group.

[0183] IV. Proposal 3: Different HARQ-ACK Codebooks for PUCCH

[0184] For example, multiple HARQ-ACK codebooks can be transmitted in a single PUCCH. For example, efficient codebook configuration and transmission can be performed, taking into account operations such as HARQ-ACK retransmission and delayed transmission introduced in particular in NR Rel-17.

[0185] For example, if multiple HARQ-ACK codebooks are included in a single PUCCH, the size of the total HARQ-ACK bits can be reduced and the size of the additionally transmitted HARQ-ACK codebooks can be limited by simplifying them.

[0186] For example, considering operations such as HARQ-ACK retransmission and HARQ-ACK deferring introduced in NR Rel-17, up to three HARQ-ACK codebooks can be transmitted in a single PUCCH. Consequently, the size of the HARQ-ACKs that can be transmitted in a single PUCCH can increase significantly. In such cases, the aforementioned problem caused by HARQ-ACK loss may be further amplified. In the proposed technology, when multiple HARQ-ACK codebooks are included in a single PUCCH, the size of the total HARQ-ACK bits can be reduced, and the size of additionally transmitted HARQ-ACK codebooks can be limited by simplifying them. To this end, the following methods may be considered.

[0187] - Method 1: The terminal can configure the HARQ-ACK codebook originally scheduled in the corresponding slot as in the conventional method, and the terminal can transmit the information by simplifying the HARQ-ACK codebook that is retransmitted or transmitted with delay using the method proposed in the present disclosure.

[0188] - Method 2: The terminal may configure the HARQ-ACK codebook originally scheduled for the corresponding slot and the HARQ-ACK codebook of the semi-persistent scheduling (SPS) PDSCH transmitted with delay as in the conventional method, and the terminal may transmit the retransmitted HARQ-ACK codebook with simplified information using the method proposed in the present disclosure.

[0189] For example, if HARQ-ACK information other than the HARQ-ACK codebook originally scheduled to be transmitted in that slot is transmitted in that slot, the following terminal operation may be considered.

[0190] - Method 1: The terminal can configure the HARQ-ACK codebook originally scheduled in the corresponding slot as in the conventional method, and the terminal can transmit information by simplifying it using another HARQ-ACK codebook using the method proposed in this disclosure.

[0191] According to the present disclosure, efficient bit usage is possible even when multiple HARQ-ACK codebooks are included in a single PUCCH, thereby enabling efficient use of wireless resources and reduced power consumption of the terminal. Additionally, problems caused by HARQ-ACK loss can be mitigated, thereby improving the reliability of the system.

[0192] FIG. 9 illustrates a procedure performed by a first device according to one embodiment of the present disclosure. The embodiment of FIG. 9 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of said embodiments may be omitted.

[0193] Referring to FIG. 9, at step S910, the first device can obtain the maximum number of possible transmission failures N within the interval. At step S920, the first device can generate HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the maximum number of transmission failures N. At step S930, the first device can transmit the HARQ feedback information to the second device. For example, N may be a positive integer.

[0194] For example, the number of maximum transmission failures N may be a value predefined to the first device.

[0195] For example, the number of maximum transmission failures N can be obtained through signaling from the second device.

[0196] For example, the number of maximum transmission failures N can be determined by the first device and signaled to the second device.

[0197] For example, the HARQ feedback information may include the indices of K physical downlink shared channel candidates for which reception failure was detected among the physical downlink shared channel candidates, and K may be a positive integer less than or equal to N.

[0198] For example, the above HARQ feedback information may include up to N indices of physical downlink shared channel candidates for which reception failure has been detected among the physical downlink shared channel candidates.

[0199] For example, based on L transmission blocks being allowed in one physical downlink shared channel candidate, the HARQ feedback information may include the indices of K physical downlink shared channel candidates for which reception failure was detected and K*(L-1) bits, wherein L may be a positive integer and K may be a positive integer less than or equal to N. For example, each of the indices of the K physical downlink shared channel candidates may be associated with (L-1) bits.

[0200] For example, the index of a physical downlink shared channel candidate may indicate transmission within the shared channel candidate and the failure of the first transmission block, and the (L-1) bits associated with each index may indicate the success or failure of the remaining transmission blocks, excluding the first transmission block, within that physical downlink shared channel candidate. For example, each bit may indicate that the transmission block was successfully received if '0' and that a reception failure occurred if '1'. For example, in this manner, the receiving terminal can efficiently report the individual reception status of transmission blocks for each candidate, and the base station can selectively retransmit only the transmission blocks that require retransmission based on the corresponding feedback information. Therefore, the success or failure of the first transmission block can be implicitly expressed by whether the index of the corresponding physical downlink shared channel candidate is included. For example, if the index is included in the HARQ feedback information, the first transmission block of that candidate may be considered to have failed to receive, and if the index is not included, the first transmission block may be considered to have been successfully received.

[0201] For example, based on L transmission blocks being allowed in a single physical downlink shared channel candidate, the HARQ feedback information may include the indices of K physical downlink shared channel candidates for which reception failures were detected and K*L bits. Here, for example, L can be a positive integer and K can be a positive integer less than or equal to N. In this case, for example, the L bits associated with each index may explicitly indicate the success or failure of all transmission blocks (e.g., including the first transmission block) within the corresponding physical downlink shared channel candidate. For example, if each bit is '0', it may mean that the transmission block was successfully received, and if it is '1', it may mean that a reception failure occurred. For example, since this method reports the candidate index and L status bits together even when the first transmission block is successful, there is no need to implicitly infer the status of the first transmission block, and the status of all transmission blocks can be clearly conveyed. However, in this case, the number of feedback bits may increase, so a balance between overhead and clarity may be considered during system design.

[0202] For example, if L transmission blocks are allowed in a single physical downlink shared channel candidate and each transmission block consists of multiple Code Block Groups (CBGs), the HARQ feedback information may include the indices of K physical downlink shared channel candidates for which reception failures were detected and K*L*G bits. Here, for example, L may be a positive integer, G may be a positive integer representing the number of CBGs within each transmission block, and K may be a positive integer less than or equal to N. In this case, for example, the L*G bits associated with each index may explicitly indicate the success or failure of each CBG for all transmission blocks within the corresponding physical downlink shared channel candidate. For example, if each bit is '0', it may mean that the corresponding CBG was successfully received, and if it is '1', it may mean that the reception of the corresponding CBG failed. For example, since this method provides granular feedback at the CBG level, the base station can selectively retransmit only the failed CBGs rather than the entire transmission block, and retransmission overhead can be reduced. However, since CBG unit reporting can significantly increase the number of feedback bits, the system can be designed to consider a balance between feedback efficiency and retransmission efficiency depending on the CBG size, L value, and / or K value.

[0203] For example, the index of the first physical downlink shared channel candidate included in the above HARQ feedback information may include information indicating the success of all transmissions.

[0204] For example, the index of the first physical downlink shared channel candidate included in the above HARQ feedback information may include information indicating N or more transmission failures.

[0205] For example, the above HARQ feedback information may include an index obtained by joint encoding the indices of a plurality of physical downlink shared channel candidates for which reception failure was detected among the physical downlink shared channel candidates.

[0206] For example, the maximum number of transmission failures N mentioned above may be the number of transmission failures that can occur in a slot interval in a single physical uplink control channel.

[0207] For example, the maximum number of transmission failures N mentioned above may be the number of possible transmission failures occurring between TDRA (time domain resource allocation) rows or in groups of TDRA rows in a single physical uplink control channel.

[0208] The proposed method above may be applied to a device according to various embodiments of the present disclosure. For example, a processor (102) of a first device (100) may obtain a maximum number of transmission failures N that may occur within a interval, and / or the processor (102) of the first device (100) may generate HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the maximum number of transmission failures N, and / or the processor (102) of the first device (100) may control a transceiver (106) to transmit the HARQ feedback information to a second device. For example, N may be a positive integer.

[0209] According to one embodiment of the present disclosure, a first device may be provided. For example, the first device may include at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: obtaining a maximum number of transmission failures N that may occur within a interval; generating HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the maximum number of transmission failures N; and / or transmitting the HARQ feedback information to a second device. For example, N may be a positive integer.

[0210] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause a first device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: obtaining a maximum number of transmission failures N that may occur within a interval; generating HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the maximum number of transmission failures N; and / or transmitting the HARQ feedback information to a second device. For example, N may be a positive integer.

[0211] According to one embodiment of the present disclosure, a non-transient computer-readable storage medium recording instructions may be provided. For example, the instructions may cause a first device to perform an operation based on execution. For example, the operation may include at least one of: obtaining a maximum number of transmission failures N that may occur within a interval; generating HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the maximum number of transmission failures N; and / or transmitting the HARQ feedback information to a second device. For example, N may be a positive integer.

[0212] FIG. 10 illustrates a procedure performed by a second device according to one embodiment of the present disclosure. The embodiment of FIG. 10 may be combined with various embodiments of the present disclosure, and some descriptions, functions, procedures, suggestions, methods, and / or operations of said embodiments may be omitted.

[0213] Referring to FIG. 10, in step S1010, the second device may set the maximum number of possible transmission failures N within the interval to the first device. In step S1020, the second device may receive HARQ (hybrid automatic repeat request) feedback information regarding physical downlink shared channel candidates within the interval from the first device. For example, the HARQ feedback information may be based on the maximum number of transmission failures N, and N may be a positive integer.

[0214] For example, the HARQ feedback information may include the indices of K physical downlink shared channel candidates for which reception failure was detected among the physical downlink shared channel candidates, and K may be a positive integer less than or equal to N.

[0215] For example, the above HARQ feedback information may include up to N indices of physical downlink shared channel candidates for which reception failure has been detected among the physical downlink shared channel candidates.

[0216] For example, based on L transmission blocks being allowed in one physical downlink shared channel candidate, the HARQ feedback information may include the indices of K physical downlink shared channel candidates for which reception failure was detected and K*(L-1) bits, wherein L may be a positive integer and K may be a positive integer less than or equal to N. For example, each of the indices of the K physical downlink shared channel candidates may be associated with (L-1) bits.

[0217] For example, the index of a physical downlink shared channel candidate may indicate transmission within the shared channel candidate and the failure of the first transmission block, and the (L-1) bits associated with each index may indicate the success or failure of the remaining transmission blocks, excluding the first transmission block, within that physical downlink shared channel candidate. For example, each bit may indicate that the transmission block was successfully received if '0' and that a reception failure occurred if '1'. For example, in this manner, the receiving terminal can efficiently report the individual reception status of transmission blocks for each candidate, and the base station can selectively retransmit only the transmission blocks that require retransmission based on the corresponding feedback information. Therefore, the success or failure of the first transmission block can be implicitly expressed by whether the index of the corresponding physical downlink shared channel candidate is included. For example, if the index is included in the HARQ feedback information, the first transmission block of that candidate may be considered to have failed to receive, and if the index is not included, the first transmission block may be considered to have been successfully received.

[0218] For example, based on L transmission blocks being allowed in a single physical downlink shared channel candidate, the HARQ feedback information may include the indices of K physical downlink shared channel candidates for which reception failures were detected and K*L bits. Here, for example, L can be a positive integer and K can be a positive integer less than or equal to N. In this case, for example, the L bits associated with each index may explicitly indicate the success or failure of all transmission blocks (e.g., including the first transmission block) within the corresponding physical downlink shared channel candidate. For example, if each bit is '0', it may mean that the transmission block was successfully received, and if it is '1', it may mean that a reception failure occurred. For example, since this method reports the candidate index and L status bits together even when the first transmission block is successful, there is no need to implicitly infer the status of the first transmission block, and the status of all transmission blocks can be clearly conveyed. However, in this case, the number of feedback bits may increase, so a balance between overhead and clarity may be considered during system design.

[0219] For example, if L transmission blocks are allowed in a single physical downlink shared channel candidate and each transmission block consists of multiple Code Block Groups (CBGs), the HARQ feedback information may include the indices of K physical downlink shared channel candidates for which reception failures were detected and K*L*G bits. Here, for example, L may be a positive integer, G may be a positive integer representing the number of CBGs within each transmission block, and K may be a positive integer less than or equal to N. In this case, for example, the L*G bits associated with each index may explicitly indicate the success or failure of each CBG for all transmission blocks within the corresponding physical downlink shared channel candidate. For example, if each bit is '0', it may mean that the corresponding CBG was successfully received, and if it is '1', it may mean that the reception of the corresponding CBG failed. For example, since this method provides granular feedback at the CBG level, the base station can selectively retransmit only the failed CBGs rather than the entire transmission block, and retransmission overhead can be reduced. However, since CBG unit reporting can significantly increase the number of feedback bits, the system can be designed to consider a balance between feedback efficiency and retransmission efficiency depending on the CBG size, L value, and / or K value.

[0220] For example, the index of the first physical downlink shared channel candidate included in the above HARQ feedback information may include information indicating the success of all transmissions.

[0221] For example, the index of the first physical downlink shared channel candidate included in the above HARQ feedback information may include information indicating N or more transmission failures.

[0222] For example, the above HARQ feedback information may include an index obtained by joint encoding the indices of a plurality of physical downlink shared channel candidates for which reception failure was detected among the physical downlink shared channel candidates.

[0223] For example, the maximum number of transmission failures N mentioned above may be the number of transmission failures that can occur in a slot interval in a single physical uplink control channel.

[0224] For example, the maximum number of transmission failures N mentioned above may be the number of possible transmission failures occurring between TDRA (time domain resource allocation) rows or in groups of TDRA rows in a single physical uplink control channel.

[0225] The proposed method above may be applied to a device according to various embodiments of the present disclosure. For example, a processor (202) of a second device (200) may control a transceiver (206) to set a maximum number of possible transmission failures N within a interval to the first device, and / or the processor (202) of the second device (200) may control a transceiver (206) to receive HARQ (hybrid automatic repeat request) feedback information regarding physical downlink shared channel candidates within the interval from the first device. For example, the HARQ feedback information may be based on the maximum number of transmission failures N, and N may be a positive integer.

[0226] According to one embodiment of the present disclosure, a second device may be provided. For example, the second device may include at least one transceiver; at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause the second device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: setting the first device a maximum number of transmission failures N that may occur within a interval; and / or receiving HARQ (hybrid automatic repeat request) feedback information regarding physical downlink shared channel candidates within the interval from the first device. For example, the HARQ feedback information may be based on the maximum number of transmission failures N, and N may be a positive integer.

[0227] According to one embodiment of the present disclosure, a processing device may be provided. For example, the processing device may include at least one processor; and at least one memory connected to the at least one processor and storing instructions. For example, the instructions may cause a second device to perform an operation based on execution by the at least one processor. For example, the operation may include at least one of: setting a first device a maximum number of transmission failures N that may occur within a interval; and / or receiving a hybrid automatic repeat request (HARQ) feedback information regarding a candidate physical downlink shared channel within the interval from the first device. For example, the HARQ feedback information may be based on the maximum number of transmission failures N, and N may be a positive integer.

[0228] According to one embodiment of the present disclosure, a non-transient computer-readable storage medium recording instructions may be provided. For example, the instructions may cause a second device to perform an operation based on execution. For example, the operation may include at least one of: setting a first device a maximum number of transmission failures N that may occur within a interval; and / or receiving a hybrid automatic repeat request (HARQ) feedback information regarding a candidate physical downlink shared channel within the interval from the first device. For example, the HARQ feedback information may be based on the maximum number of transmission failures N, and N may be a positive integer.

[0229] According to various embodiments of the present disclosure, the size of the HARQ-ACK codebook can be efficiently compressed or reduced. Accordingly, the reliability and resource efficiency of PUCCH transmission can be improved, and the power consumption of the terminal can be reduced. Through this, the terminal can adjust the size of the transmitted HARQ-ACK codebook, and the terminal can efficiently manage information even when various types of HARQ-ACK codebooks and multiple HARQ-ACK codebooks are multiplexed into a single PUCCH. In addition, by optimizing PUCCH resources in consideration of the included HARQ-ACK codebook, side effects that may occur in the event of transmission failure can be minimized and the number of retransmissions can be reduced. This enables the appropriate allocation of PUCCH resources, which can contribute to increasing transmission reliability through resource distribution suited to uplink channel conditions. Consequently, the efficiency of HARQ-ACK codebook management can be improved in various wireless communication environments, including NR systems, and an improvement in the overall performance of wireless communication transmission and reception structures and services can be expected.

[0230] The methods proposed in this disclosure are described based on NR systems, but are not limited to a specific transmission and reception form of NR unless otherwise stated. Therefore, it is obvious that the methods proposed in this disclosure can be applied to the structures and services of transmission and reception of all wireless communication without further explanation.

[0231] Various embodiments of the present disclosure may be combined with one another, and some descriptions, functions, procedures, suggestions, methods, and / or operations of the embodiments may be omitted.

[0232] The following describes an apparatus to which various embodiments of the present disclosure may be applied.

[0233] Although not limited to this, the various descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document may be applied to various fields requiring wireless communication / connection (e.g., 5G) between devices.

[0234] Examples are provided in more detail below with reference to the drawings. In the following drawings and descriptions, the same reference numerals may represent the same or corresponding hardware blocks, software blocks, or function blocks unless otherwise described.

[0235] FIG. 11 shows a communication system (1) according to one embodiment of the present disclosure. The embodiment of FIG. 11 can be combined with various embodiments of the present disclosure.

[0236] Referring to FIG. 11, a communication system (1) to which various embodiments of the present disclosure are applied includes a wireless device, a base station, and a network. Here, the wireless device refers to a device that performs communication using wireless access technology (e.g., 5G NR (New RAT), LTE (Long Term Evolution)) and may be referred to as a communication / wireless / 5G device. Although not limited thereto, the wireless device may include a robot (100a), a vehicle (100b-1, 100b-2), an XR (eXtended Reality) device (100c), a hand-held device (100d), a home appliance (100e), an IoT (Internet of Thing) device (100f), and an AI device / server (400). For example, the vehicle may include a vehicle equipped with wireless communication functions, an autonomous vehicle, a vehicle capable of performing inter-vehicle communication, etc. Here, the vehicle may include an Unmanned Aerial Vehicle (UAV) (e.g., a drone) and / or an Aerial Vehicle (AV) (e.g., Advanced Air Mobility). The XR device includes an Augmented Reality (AR) / Virtual Reality (VR) / Mixed Reality (MR) device and may be implemented in the form of a Head-Mounted Device (HMD), a Head-Up Display (HUD) equipped in a vehicle, a television, a smartphone, a computer, a wearable device, a home appliance, digital signage, a vehicle, a robot, etc. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glasses), a computer (e.g., a laptop, etc.). The home appliance may include a TV, a refrigerator, a washing machine, etc. The IoT device may include a sensor, a smart meter, etc. For example, a base station and a network may be implemented as a wireless device, and a specific wireless device (200a) may operate as a base station / network node to other wireless devices.

[0237] Here, the wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may include LTE, NR, and 6G, as well as Narrowband Internet of Things for low-power communication. For example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, but is not limited to the names mentioned above. Additionally, or generally, the wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may perform communication based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology may be implemented in at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the names mentioned above. Additionally or generally, wireless communication technology implemented in the wireless devices (100a to 100f) of this specification may include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) for low-power communication, and is not limited to the names mentioned above. As an example, ZigBee technology can create personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and may be referred to by various names.

[0238] Wireless devices (100a to 100f) can be connected to a network (300) through a base station (200). Artificial Intelligence (AI) technology may be applied to the wireless devices (100a to 100f), and the wireless devices (100a to 100f) can be connected to an AI server (400) through the network (300). The network (300) can be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. The wireless devices (100a to 100f) may communicate with each other through the base station (200) / network (300), but they may also communicate directly (e.g., sidelink communication) without going through the base station / network. For example, vehicles (100b-1, 100b-2) can communicate directly (e.g., V2V (Vehicle to Vehicle) / V2X (Vehicle to everything) communication). Also, IoT devices (e.g., sensors) can communicate directly with other IoT devices (e.g., sensors) or other wireless devices (100a to 100f).

[0239] Wireless communication / connection (150a, 150b, 150c) can be established between wireless devices (100a~100f) / base station (200) and base station (200) / base station (200). Here, wireless communication / connection can be achieved through various wireless access technologies (e.g., 5G NR), such as uplink / downlink communication (150a), sidelink communication (150b) (or D2D communication), and inter-base station communication (150c) (e.g., relay, IAB (Integrated Access Backhaul)). Through wireless communication / connection (150a, 150b, 150c), wireless devices and base stations / wireless devices, and base stations and base stations can transmit / receive wireless signals to / from each other. For example, wireless communication / connection (150a, 150b, 150c) can transmit / receive signals through various physical channels. To this end, based on various proposals of the present disclosure, at least some of the following may be performed: various configuration information setting processes for transmitting / receiving wireless signals, various signal processing processes (e.g., channel encoding / decoding, modulation / demodulation, resource mapping / demapping, etc.), resource allocation processes, etc.

[0240] FIG. 12 shows a wireless device according to one embodiment of the present disclosure. The embodiment of FIG. 12 may be combined with various embodiments of the present disclosure.

[0241] Referring to FIG. 12, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR). Here, {the first wireless device (100), the second wireless device (200)} may correspond to {wireless device (100x), base station (200)} and / or {wireless device (100x), wireless device (100x)} of FIG. 11.

[0242] The first wireless device (100) includes one or more processors (102) and one or more memories (104), and may additionally include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memory (104) and / or transceivers (106) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed in this document. For example, the processor (102) may process information within the memory (104) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (106). Additionally, the processor (102) may receive a wireless signal containing a second information / signal through the transceiver (106) and then store information obtained from the signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may store software code containing instructions for performing some or all of the processes controlled by the processor (102) or for performing the descriptions, functions, procedures, proposals, methods, and / or operation sequence diagrams disclosed in this document. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals through one or more antennas (108). The transceiver (106) may include a transmitter and / or receiver. The transceiver (106) may be combined with an RF (Radio Frequency) unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0243] The second wireless device (200) includes one or more processors (202) and one or more memories (204), and may additionally include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memory (204) and / or transceivers (206) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation disclosed in this document. For example, the processor (202) may process information within the memory (204) to generate a third information / signal and then transmit a wireless signal containing the third information / signal through the transceiver (206). Additionally, the processor (202) may receive a wireless signal containing a fourth information / signal through the transceiver (206) and then store information obtained from the signal processing of the fourth information / signal in the memory (204). Memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, memory (204) may store software code containing instructions for performing some or all of the processes controlled by the processor (202) or for performing the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. Here, the processor (202) and memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). A transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals through one or more antennas (208). The transceiver (206) may include a transmitter and / or receiver. The transceiver (206) may be interchangeable with an RF unit. In this disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0244] Hereinafter, hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document. One or more processors (102, 202) may generate a signal (e.g., baseband signal) containing a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in this document and provide it to one or more transceivers (106, 206). One or more processors (102, 202) may receive a signal (e.g., baseband signal) from one or more transceivers (106, 206) and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document.

[0245] One or more processors (102, 202) may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or flowcharts disclosed in this document may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be contained in one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operation sequences disclosed in this document may be implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0246] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories (104, 204) may be composed of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer read storage media, and / or combinations thereof. One or more memories (104, 204) may be located inside and / or outside of one or more processors (102, 202). Additionally, one or more memories (104, 204) may be connected to one or more processors (102, 202) through various technologies such as wired or wireless connections.

[0247] One or more transceivers (106, 206) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc., of this document to one or more other devices. One or more transceivers (106, 206) may receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts, etc., disclosed in this document from one or more other devices. For example, one or more transceivers (106, 206) may be connected to one or more processors (102, 202) and may transmit and receive wireless signals. For example, one or more processors (102, 202) may control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation disclosed in this document through one or more antennas (108, 208). In this document, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert the received wireless signal / channel, etc. from an RF band signal to a baseband signal in order to process the received user data, control information, wireless signal / channel, etc. using one or more processors (102, 202).One or more transceivers (106, 206) can convert user data, control information, wireless signals / channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals. To this end, one or more transceivers (106, 206) may include (analog) oscillators and / or filters.

[0248] FIG. 13 shows a signal processing circuit for a transmission signal according to one embodiment of the present disclosure. The embodiment of FIG. 13 can be combined with various embodiments of the present disclosure.

[0249] Referring to FIG. 13, the signal processing circuit (1000) may include a scrambler (1010), a modulator (1020), a layer mapper (1030), a precoder (1040), a resource mapper (1050), and a signal generator (1060). Although not limited thereto, the operation / function of FIG. 13 may be performed in the processor (102, 202) and / or transceiver (106, 206) of FIG. 12. The hardware elements of FIG. 13 may be implemented in the processor (102, 202) and / or transceiver (106, 206) of FIG. 12. For example, blocks 1010 through 1060 may be implemented in the processor (102, 202) of FIG. 12. Additionally, blocks 1010 to 1050 may be implemented in the processor (102, 202) of FIG. 12, and block 1060 may be implemented in the transceiver (106, 206) of FIG. 12.

[0250] The codeword can be converted into a wireless signal through the signal processing circuit (1000) of FIG. 13. Here, the codeword is an encoded bit sequence of an information block. The information block may include a transmission block (e.g., UL-SCH transmission block, DL-SCH transmission block). The wireless signal can be transmitted through various physical channels (e.g., PUSCH, PDSCH).

[0251] Specifically, a codeword can be converted into a scrambled bit sequence by a scrambler (1010). The scrambled sequence used for scrambling is generated based on an initialization value, which may include ID information of a wireless device, etc. The scrambled bit sequence can be modulated into a modulation symbol sequence by a modulator (1020). The modulation method may include pi / 2-BPSK (pi / 2-Binary Phase Shift Keying), m-PSK (m-Phase Shift Keying), m-QAM (m-Quadrature Amplitude Modulation), etc. The complex modulation symbol sequence can be mapped to one or more transmission layers by a layer mapper (1030). The modulation symbols of each transmission layer can be mapped to the corresponding antenna port(s) by a precoder (1040) (precoding). The output z of the precoder (1040) can be obtained by multiplying the output y of the layer mapper (1030) by an N*M precoding matrix W. Here, N is the number of antenna ports and M is the number of transmission layers. Here, the precoder (1040) can perform precoding after performing transform precoding (e.g., DFT transform) on the complex modulation symbols. Additionally, the precoder (1040) can perform precoding without performing transform precoding.

[0252] A resource mapper (1050) can map the modulation symbols of each antenna port to a time-frequency resource. The time-frequency resource may include multiple symbols (e.g., CP-OFDMA symbols, DFT-s-OFDMA symbols) in the time domain and multiple subcarriers in the frequency domain. A signal generator (1060) generates a radio signal from the mapped modulation symbols, and the generated radio signal can be transmitted to another device through each antenna. To this end, the signal generator (1060) may include an Inverse Fast Fourier Transform (IFFT) module, a Cyclic Prefix (CP) inserter, a Digital-to-Analog Converter (DAC), a frequency uplink converter, etc.

[0253] The signal processing process for a received signal in a wireless device can be configured as the inverse of the signal processing process (1010–1060) of FIG. 13. For example, a wireless device (e.g., 100, 200 in FIG. 12) can receive a wireless signal from the outside through an antenna port / transceiver. The received wireless signal can be converted into a baseband signal through a signal restorer. To this end, the signal restorer may include a frequency downlink converter, an analog-to-digital converter (ADC), a CP remover, and a Fast Fourier Transform (FFT) module. Subsequently, the baseband signal can be restored into a codeword through a resource de-mapper process, a postcoding process, a demodulation process, and a de-scrambling process. The codeword can be restored into the original information block through decoding. Accordingly, a signal processing circuit (not shown) for a received signal may include a signal restorer, a resource de-mapper, a postcoder, a demodulator, a de-scrambler, and a decoder.

[0254] FIG. 14 illustrates a wireless device according to one embodiment of the present disclosure. The wireless device may be implemented in various forms depending on the use-example / service (see FIG. 11). The embodiment of FIG. 14 may be combined with various embodiments of the present disclosure.

[0255] Referring to FIG. 14, the wireless device (100, 200) corresponds to the wireless device (100, 200) of FIG. 12 and may be composed of various elements, components, units / parts, and / or modules. For example, the wireless device (100, 200) may include a communication unit (110), a control unit (120), a memory unit (130), and additional elements (140). The communication unit may include a communication circuit (112) and transceiver(s) (114). For example, the communication circuit (112) may include one or more processors (102, 202) and / or one or more memories (104, 204) of FIG. 12. For example, the transceiver(s) (114) may include one or more transceivers (106, 206) and / or one or more antennas (108, 208) of FIG. 12. The control unit (120) is electrically connected to the communication unit (110), the memory unit (130), and additional elements (140) and controls the general operation of the wireless device. For example, the control unit (120) may control the electrical / mechanical operation of the wireless device based on a program / code / command / information stored in the memory unit (130). Additionally, the control unit (120) may transmit information stored in the memory unit (130) to an external (e.g., another communication device) via a wireless / wired interface through the communication unit (110), or store information received from an external (e.g., another communication device) via a wireless / wired interface through the communication unit (110) in the memory unit (130).

[0256] The additional element (140) can be configured in various ways depending on the type of wireless device. For example, the additional element (140) may include at least one of a power unit / battery, an input / output unit (I / O unit), a driving unit, and a computing unit. Although not limited thereto, the wireless device may be implemented in the form of a robot (Fig. 11, 100a), a vehicle (Fig. 11, 100b-1, 100b-2), an XR device (Fig. 11, 100c), a portable device (Fig. 11, 100d), a home appliance (Fig. 11, 100e), an IoT device (Fig. 11, 100f), a digital broadcasting terminal, a hologram device, a public safety device, an MTC device, a medical device, a fintech device (or financial device), a security device, a climate / environment device, an AI server / device (Fig. 11, 400), a base station (Fig. 11, 200), a network node, etc. Wireless devices can be used in a movable or fixed location depending on the use—e.g., service.

[0257] In FIG. 14, various elements, components, units / parts, and / or modules within the wireless device (100, 200) may be entirely interconnected via a wired interface, or at least partially connected via a communication unit (110). For example, within the wireless device (100, 200), the control unit (120) and the communication unit (110) may be connected via a wire, and the control unit (120) and the first unit (e.g., 130, 140) may be connected wirelessly via the communication unit (110). Additionally, each element, component, unit / part, and / or module within the wireless device (100, 200) may include one or more additional elements. For example, the control unit (120) may be composed of one or more sets of processors. For example, the control unit (120) may be composed of a set of a communication control processor, an application processor, an Electronic Control Unit (ECU), a graphics processing processor, a memory control processor, etc. As another example, the memory unit (130) may be composed of RAM (Random Access Memory), DRAM (Dynamic RAM), ROM (Read Only Memory), flash memory, volatile memory, non-volatile memory and / or a combination thereof.

[0258] Hereinafter, an implementation example of FIG. 14 will be described in more detail with reference to the drawings.

[0259] FIG. 15 illustrates a portable device according to one embodiment of the present disclosure. The portable device may include a smartphone, a smartpad, a wearable device (e.g., a smartwatch, smart glasses), a portable computer (e.g., a laptop, etc.). The portable device may be referred to as an MS (Mobile Station), UT (User Terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), or WT (Wireless Terminal). The embodiment of FIG. 15 may be combined with various embodiments of the present disclosure.

[0260] Referring to FIG. 15, the portable device (100) may include an antenna unit (108), a communication unit (110), a control unit (120), a memory unit (130), a power supply unit (140a), an interface unit (140b), and an input / output unit (140c). The antenna unit (108) may be configured as part of the communication unit (110). Blocks 110 to 130 / 140a to 140c each correspond to blocks 110 to 130 / 140 of FIG. 14.

[0261] The communication unit (110) can transmit and receive signals (e.g., data, control signals, etc.) with other wireless devices and base stations. The control unit (120) can control the components of the portable device (100) to perform various operations. The control unit (120) may include an AP (Application Processor). The memory unit (130) can store data / parameters / programs / code / commands required for the operation of the portable device (100). Additionally, the memory unit (130) can store input / output data / information, etc. The power supply unit (140a) supplies power to the portable device (100) and may include wired / wireless charging circuits, batteries, etc. The interface unit (140b) can support the connection between the portable device (100) and other external devices. The interface unit (140b) may include various ports (e.g., audio input / output ports, video input / output ports) for connection with external devices. The input / output unit (140c) can receive or output video information / signals, audio information / signals, data, and / or information input from a user. The input / output unit (140c) may include a camera, a microphone, a user input unit, a display unit (140d), a speaker and / or a haptic module, etc.

[0262] For example, in the case of data communication, the input / output unit (140c) acquires information / signals (e.g., touch, text, voice, image, video) input from the user, and the acquired information / signals can be stored in the memory unit (130). The communication unit (110) converts the information / signals stored in the memory into wireless signals and can directly transmit the converted wireless signals to another wireless device or to a base station. Additionally, the communication unit (110) can receive wireless signals from another wireless device or base station and then restore the received wireless signals to their original information / signals. The restored information / signals can be stored in the memory unit (130) and then output in various forms (e.g., text, voice, image, video, haptic) through the input / output unit (140c).

[0263] The claims described in this specification may be combined in various ways. For example, the technical features of the method claims in this specification may be combined to be implemented as a device, and the technical features of the device claims in this specification may be combined to be implemented as a method. Furthermore, the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a device, and the technical features of the method claims and the technical features of the device claims in this specification may be combined to be implemented as a method.

Claims

1. Regarding the method, The first device obtains the maximum number of transmission failures N that may occur within the interval; The first device generates HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the number N of maximum transmission failures; and The first device transmits the HARQ feedback information to the second device; comprising, The above N is a positive integer, method.

2. In Paragraph 1, A method in which the number of maximum transmission failures N is a value predefined to the first device.

3. In Paragraph 1, The method wherein the number of maximum transmission failures N is obtained through signaling from the second device.

4. In Paragraph 1, A method in which the number of maximum transmission failures N is determined by the first device and signaled to the second device.

5. In Paragraph 1, The above HARQ feedback information includes the indices of K physical downlink shared channel candidates for which reception failure was detected among the physical downlink shared channel candidates, and A method in which the above K is a positive integer less than or equal to the above N.

6. In Paragraph 1, A method in which the above HARQ feedback information includes up to N indices of physical downlink shared channel candidates for which reception failure has been detected among the physical downlink shared channel candidates.

7. In Paragraph 1, Based on L transmission blocks being allowed in one physical downlink shared channel candidate, the HARQ feedback information includes the indices of K physical downlink shared channel candidates for which reception failure was detected among the physical downlink shared channel candidates, and K*(L-1) bits, and The above L is a positive integer, and A method in which the above K is a positive integer less than or equal to the above N.

8. In Paragraph 7, A method in which each of the indices of the K physical downlink shared channel candidates is associated with (L-1) bits.

9. In Paragraph 1, A method in which the index of the first physical downlink shared channel candidate included in the above HARQ feedback information contains information indicating the success of all transmissions.

10. In Paragraph 1, A method in which the index of the first physical downlink shared channel candidate included in the above HARQ feedback information includes information indicating N or more transmission failures.

11. In Paragraph 1, A method comprising the above HARQ feedback information including an index obtained by joint encoding the indices of a plurality of physical downlink shared channel candidates in which reception failure is detected among physical downlink shared channel candidates.

12. In Paragraph 1, The above maximum number of transmission failures N is the number of possible transmission failures in a slot interval in a physical uplink control channel, method.

13. In Paragraph 1, The method wherein the maximum number of transmission failures N is the number of possible transmission failures that may occur between TDRA (time domain resource allocation) rows or in groups of TDRA rows in a single physical uplink control channel.

14. In the first device, At least one transmitter / receiver; At least one processor; and The first device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Obtaining the maximum number of possible transmission failures N within the interval; Generating HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the number of maximum transmission failures N; and Transmitting the above HARQ feedback information to a second device; comprising, The first device, where N is a positive integer.

15. In a processing device, At least one processor; and The first device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Obtaining the maximum number of possible transmission failures N within the interval; Generating HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the number of maximum transmission failures N; and Transmitting the above HARQ feedback information to a second device; comprising, A processing device in which N is a positive integer.

16. A non-transient computer-readable storage medium that records instructions, The above commands cause the first device to perform an operation based on execution, wherein the operation is: Obtaining the maximum number of possible transmission failures N within the interval; Generating HARQ (hybrid automatic repeat request) feedback information for physical downlink shared channel candidates within the interval based on the number of maximum transmission failures N; and Transmitting the above HARQ feedback information to a second device; comprising, A non-transient computer-readable storage medium in which N is a positive integer.

17. Regarding the method, The second device sets the first device the maximum number of possible transmission failures N that can occur within the interval; and The second device comprises the step of receiving HARQ (hybrid automatic repeat request) feedback information regarding a physical downlink shared channel candidate within the section from the first device; wherein The above HARQ feedback information is based on the maximum number of transmission failures N, and The above N is a positive integer, method.

18. In the second device, At least one transmitter / receiver; At least one processor; and The second device is configured to perform an operation based on the instructions being executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Setting the first device the maximum number of possible transmission failures N that may occur within the interval; and Receiving HARQ (hybrid automatic repeat request) feedback information regarding physical downlink shared channel candidates within the above interval from the first device; wherein The above HARQ feedback information is based on the maximum number of transmission failures N, and The second device, where N is a positive integer.

19. In a processing device, At least one processor; and The second device is configured to perform an operation based on the fact that the instructions are executed by the at least one processor, wherein the operation comprises: at least one memory connected to the at least one processor and storing instructions, the instructions being executed by the at least one processor. Setting the first device the maximum number of possible transmission failures N that may occur within the interval; and Receiving HARQ (hybrid automatic repeat request) feedback information regarding physical downlink shared channel candidates within the above interval from the first device; wherein The above HARQ feedback information is based on the maximum number of transmission failures N, and A processing device in which N is a positive integer.

20. A non-transient computer-readable storage medium that records instructions, The above commands cause the second device to perform an operation based on execution, wherein the operation is: Setting the first device the maximum number of possible transmission failures N that may occur within the interval; and Receiving HARQ (hybrid automatic repeat request) feedback information regarding physical downlink shared channel candidates within the above interval from the first device; wherein The above HARQ feedback information is based on the maximum number of transmission failures N, and A non-transient computer-readable storage medium in which N is a positive integer.

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