Method for receiving downlink channel, user equipment, processing apparatus, storage medium and computer program, and method and base station for transmitting downlink channel

Abstract

A user equipment (UE) may include receiving a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during the first activity time according to the cell-specific DRX configuration; and performing a second predetermined operation during a time period other than the first active time according to the cell-specific DRX configuration.

Description

Technical Field

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

[0002] Various technologies such as machine-to-machine (M2M) communication, machine-type communication (MTC), and various devices requiring high data throughput (e.g., smart phones and tablet personal computers (PCs)) have emerged and become popular. Therefore, the data throughput required to be processed in cellular networks has increased rapidly. In order to meet this rapidly increasing data throughput, carrier aggregation technology or cognitive radio technology for effectively using more frequency bands and multiple input multiple output (MIMO) technology or multiple base station (BS) cooperation technology for increasing the data capacity transmitted on limited frequency resources have been developed.

[0003] As more and more communication devices require greater communication capacity, enhanced mobile broadband (eMBB) communication is needed relative to traditional radio access technology (RAT). In addition, massive machine type communication (mMTC), which provides various services anytime and anywhere by connecting multiple devices and objects to each other, is a major issue to be considered in next-generation communications.

[0004] Discussions are also underway to design communication systems that take into account services / user equipment (UE) that are sensitive to reliability and latency. Discussions are also underway to introduce next generation RATs that take into account eMBB communications, mMTC, ultra-reliable low latency communications (URLLC), etc. Summary of the invention

[0005] Technical issues

[0006] The present disclosure aims to provide energy saving methods and / or procedures for a Base Station (BS) and a User Equipment (UE).

[0007] The present disclosure provides methods and / or processes for dynamically indicating an offset value relative to a start point of a discontinuous reception (DRX) cycle.

[0008] The present disclosure also provides a method and / or process for configuring / indicating the on / off of the on-duration of a DRX cycle.

[0009] The present disclosure also provides methods and / or processes for configuring DRX groups for network energy saving (NES).

[0010] The present disclosure also provides methods and / or processes of a base station (BS) and a UE when configuring UE-specific DRX and / or cell-specific DTX / DRX.

[0011] The objects to be achieved by using the present disclosure are not limited to those specifically described above, and other objects not described herein will be more clearly understood by those skilled in the art from the following detailed description.

[0012] Technical Solution

[0013] According to one aspect of the present disclosure, a method for a user equipment (UE) to receive a downlink (DL) channel in a wireless communication system is provided. The method includes the following steps: based on receiving a random access response, receiving a user equipment (UE) specific discontinuous reception (DRX) configuration and a cell specific DRX configuration; performing a first predetermined operation during a first active time according to the cell specific DRX configuration; and performing a second predetermined operation during a time outside the first active time according to the cell specific DRX configuration.

[0014] According to another aspect of the present disclosure, a UE for receiving a DL channel in a wireless communication system is provided. The UE includes at least one transceiver, at least one processor, and at least one computer memory operatively connected to the at least one processor and storing instructions, wherein the instructions, when executed, cause the at least one processor to perform operations. The operations may include: receiving a user equipment (UE) specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration based on receiving a random access response; performing a first predetermined operation during a first active time according to the cell-specific DRX configuration; and performing a second predetermined operation during a time outside the first active time according to the cell-specific DRX configuration.

[0015] According to another aspect of the present disclosure, a processing device is provided. The processing device includes at least one transceiver, at least one processor, and at least one computer memory operatively connected to the at least one processor and storing instructions, wherein the instructions, when executed, cause the at least one processor to perform operations. The operations include: receiving a user equipment (UE) specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration based on receiving a random access response; performing a first predetermined operation during a first active time according to the cell-specific DRX configuration; and performing a second predetermined operation during a time outside the first active time according to the cell-specific DRX configuration.

[0016] According to another aspect of the present disclosure, a computer-readable storage medium is provided. The computer-readable storage medium stores at least one computer program including instructions, which, when executed by at least one processor, causes the at least one processor to perform operations for a user equipment (UE). The operations include: receiving a random access response based on a RACH preamble; receiving a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration based on receiving the random access response; performing a first predetermined operation during a first active time according to the cell-specific DRX configuration; and performing a second predetermined operation during a time outside the first active time according to the cell-specific DRX configuration.

[0017] According to another aspect of the present disclosure, a method for a BS to send a DL channel to a UE in a wireless communication system is provided. The method includes the following steps: based on receiving a random access response, sending a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first active time according to the cell-specific DRX configuration; and performing a second predetermined operation during a time outside the first active time according to the cell-specific DRX configuration.

[0018] According to another aspect of the present disclosure, a BS for transmitting a DL channel to a UE in a wireless communication system is provided. The BS includes at least one transceiver, at least one processor, and at least one computer memory operatively connected to the at least one processor and storing instructions, wherein the instructions cause the at least one processor to perform operations when executed. The operations include: based on receiving a random access response, sending a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first active time according to the cell-specific DRX configuration; and performing a second predetermined operation during a time outside the first active time according to the cell-specific DRX configuration.

[0019] In various aspects of the present disclosure, the first predetermined operation may include an operation defined for a cell-specific DRX, and the second predetermined operation may include an operation according to a UE-specific DRX configuration.

[0020] In various aspects of the present disclosure, the first predetermined operation may include an operation according to a UE-specific DRX configuration, and the second predetermined operation may include an operation defined for a cell-specific DRX.

[0021] In various aspects of the present disclosure, operations according to the UE-specific DRX configuration may include: performing DL channel monitoring during the second active time according to the UE-specific DRX configuration; omitting DL channel monitoring during a time outside the second active time; or continuing to repeat a signal configured to be repeated outside the second active time.

[0022] In various aspects of the present disclosure, operations defined for cell-specific DRX may include: sending and receiving only predetermined signals during a first active time; receiving common signals with a long cycle during a time outside the first active time; or omitting repetition of a signal configured to be repeated outside the first active time.

[0023] In various aspects of the present disclosure, operations defined for cell-specific DRX may include: sending and receiving only predetermined signals during a first active time; omitting reception of common signals during times outside the first active time; or omitting repetition of signals configured to be repeated outside the first active time.

[0024] In various aspects of the present disclosure, operations defined for cell-specific DRX may include: receiving a network energy saving (NES) mode configuration; and performing NES mode operation during the NES mode operation duration, and in this case, the NES mode operation may include any one of omitting the transmission and reception of a predetermined signal, reducing the frequency band of the predetermined signal, reducing the number of antenna ports used for the predetermined signal, or reducing the transmission power of the predetermined signal.

[0025] In various aspects of the present disclosure, the operation may also include: starting to drive an on-duration timer configured according to a cell-specific DRX to start a first active time; receiving a physical downlink control channel (PDCCH) during the first active time; and terminating the first active time based on the expiration of the on-duration timer configured according to the cell-specific DRX.

[0026] In various aspects of the present disclosure, the operation may also include: starting to drive an on-duration timer configured according to a cell-specific DRX to start a first active time; receiving a physical downlink control channel (PDCCH) during the first active time; and extending the first active time by driving an inactivity timer configured according to a cell-specific DRX based on a PDCCH including group common downlink control information (GC-DCI).

[0027] The above solutions are only some examples of the present disclosure, and those skilled in the art can deduce and understand various examples into which the technical features of the present disclosure are incorporated from the following detailed description.

[0028] Beneficial Effects

[0029] According to implementations of the present disclosure, a method and / or process for energy saving of a base station (BS) and a user equipment (UE) may be provided.

[0030] According to an implementation of the present disclosure, a method and / or process for dynamically indicating an offset value relative to a start point of a discontinuous reception (DRX) cycle may be provided.

[0031] According to an implementation of the present disclosure, a method and / or process for configuring / instructing turning on / off the on-duration of a DRX cycle may be provided.

[0032] According to implementations of the present disclosure, a method and / or process for configuring a DRX group for network energy saving (NES) may be provided.

[0033] According to an implementation of the present disclosure, methods and / or processes of a base station (BS) and a UE when configuring a user equipment (UE)-specific DRX and / or a cell-specific DTX / DRX may be provided.

[0034] According to implementations of the present disclosure, power consumption of a BS and a UE may be reduced.

[0035] Effects according to the present disclosure are not limited to those specifically described above, and other effects not described herein will be more clearly understood by those skilled in the art to which the present disclosure relates from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 An example of a communication system 1 to which an implementation of the present disclosure is applied is shown;

[0037] Figure 2 is a block diagram illustrating an example of a communication device capable of executing the method according to the present disclosure;

[0038] Figure 3 Another example of a wireless device capable of performing implementations of the present disclosure is shown;

[0039] Figure 4 An example of a frame structure used in a wireless communication system based on the 3rd Generation Partnership Project (3GPP) is shown;

[0040] Figure 5 a resource grid showing time slots;

[0041] Figure 6 A network communication process for performing an implementation of the present disclosure is shown.

[0042] Figure 7 Discontinuous reception (DRX) operation suitable for implementations of the present disclosure is shown.

[0043] Figure 8 The case where a long DRX cycle and a short DRX cycle are configured is shown.

[0044] Fig. 9 Network Energy Saving (NES) according to the present disclosure is shown.

[0045] Fig.10 The operation flow of a network according to some implementations of the present disclosure is shown.

[0046] Fig.11 A DL channel reception process in a UE according to some implementations of the present disclosure is shown.

[0047] Fig.12 A DL channel transmission process in a BS according to some implementations of the present disclosure is shown.

[0048] Fig.13 DRX operation in a UE according to some implementations of the present disclosure is illustrated. DETAILED DESCRIPTION

[0049] Hereinafter, implementations according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description given below with reference to the accompanying drawings is intended to illustrate exemplary implementations of the present disclosure, rather than to show the only implementations that can be implemented according to the present disclosure. The following detailed description includes specific details in order to provide a thorough understanding of the present disclosure. However, it will be apparent to those skilled in the art that the present disclosure can be practiced without these specific details.

[0050] In some cases, known structures and devices may be omitted or may be shown in block diagram form, thereby focusing on important features of the structures and devices so as not to obscure the concepts of the present disclosure. The same reference numerals will be used throughout the present disclosure to refer to the same or similar parts.

[0051] The following techniques, devices and systems can be applied to various wireless multiple access systems. For example, multiple access systems may include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, etc. CDMA can be implemented by radio technologies such as Universal Terrestrial Radio Access (UTRA) or CDMA2000. TDMA can be implemented by radio technologies such as Global System for Mobile Communications (GSM), General Packet Radio Service (GPRS), Enhanced Data Rate GSM Evolution (EDGE), etc. OFDMA can be specifically implemented by radio technologies such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), etc. UTRA is part of Universal Mobile Telecommunications System (UMTS), and 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of E-UMTS using E-UTRA. 3GPP LTE adopts OFDMA on the downlink (DL) and SC-FDMA on the uplink (UL). LTE-advanced (LTE-A) is an evolved version of 3GPP LTE, and 3GPP New Radio or New Radio Access Technology (NR) is an evolved version of 3GPP LTE / LTE-A.

[0052] For the convenience of description, the description will be given under the assumption that the present disclosure is applied to LTE and / or new RAT (NR). However, the technical features of the present disclosure are not limited thereto. For example, although the following detailed description is given based on a mobile communication system corresponding to a 3GPP LTE / NR system, the mobile communication system is applicable to any other mobile communication system except for matters specific to the 3GPP LTE / NR system.

[0053] For terms and techniques not described in detail among the terms and techniques used in the present disclosure, reference may be made to standard specifications based on 3GPP (for example, 3GPP TS 36.211, 3GPP TS 36.212, 3GPP TS 36.213, 3GPP TS 36.321, 3GPP TS 36.300, 3GPP TS 36.331, 3GPP TS 37.213, 3GPP TS 38.211, 3GPP TS 38.212, 3GPP TS 38.213, 3GPP TS 38.214, 3GPP TS 38.300, 3GPP TS 38.321, 3GPP TS 38.331, etc.).

[0054] In an example of the present disclosure described later, if a device "assumes" something, this may mean that a channel transmission entity transmits a channel in accordance with the corresponding "assumption". This may also mean that a channel reception entity receives or decodes a channel in a form that conforms to the "assumption" under the premise that the channel is transmitted in accordance with the "assumption".

[0055] In the present disclosure, a user equipment (UE) may be fixed or mobile. Each of the various devices that transmit and / or receive user data and / or control information by communicating with a base station (BS) may be a UE. The term UE may be referred to as a terminal device, a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, a personal digital assistant (PDA), a wireless modem, a handheld device, etc. In the present disclosure, a BS refers to a fixed station that communicates with a UE and / or another BS and exchanges data and control information with the UE and another BS. The term BS may be referred to as an advanced base station (ABS), a node B (NB), an evolved node B (eNB), a base transceiver system (BTS), an access point (AP), a processing server (PS), etc. Specifically, a BS of a universal terrestrial radio access (UTRAN) is referred to as an NB, a BS of an evolved UTRAN (E-UTRAN) is referred to as an eNB, and a BS of a new radio access technology network is referred to as a gNB. In the following, for the convenience of description, NB, eNB or gNB will be referred to as a BS regardless of the type or version of the communication technology.

[0056] In the present disclosure, a node refers to a fixed point that can send / receive a radio signal to / from a UE by communicating with the UE. Regardless of its name, various types of BSs can be used as nodes. For example, a BS, NB, eNB, picocell eNB (PeNB), home eNB (HeNB), repeater, transponder, etc. can be a node. In addition, a node may not be a BS. For example, a radio remote head (RRH) or a radio remote unit (RRU) can be a node. Typically, RRH and RRU have a power level lower than that of the BS. Since the RRH or RRU (hereinafter, RRH / RRU) is usually connected to the BS via a dedicated line such as an optical cable, the collaborative communication according to the RRH / RRU and the BS can be smoothly performed compared to the collaborative communication according to the BS connected via a wireless link. At least one antenna is installed per node. The antenna may refer to a physical antenna port or to a virtual antenna or an antenna group. A node may also be referred to as a point.

[0057] In the present disclosure, a cell refers to a specific geographical area where one or more nodes provide communication services. Therefore, in the present disclosure, communication with a specific cell may mean communication with a BS or node that provides communication services to a specific cell. The DL / UL signal of a specific cell refers to the DL / UL signal from / to the BS or node that provides communication services to the specific cell. A cell that provides UL / DL communication services to a UE is particularly referred to as a service cell. In addition, the channel state / quality of a specific cell refers to the channel state / quality of a channel or communication link generated between a BS or node that provides communication services to a specific cell and the UE. In a 3GPP-based communication system, a UE can use a CRS sent on a cell-specific reference signal (CRS) resource and / or a CSI-RS sent on a channel state information reference signal (CSI-RS) resource (allocated to a specific node by an antenna port of a specific node) to measure the DL channel state from a specific node.

[0058] The 3GPP-based communication system uses the concept of a cell in order to manage radio resources, and distinguishes a cell related to radio resources from a cell of a geographical area.

[0059] A "cell" of a geographic area may be understood as a coverage area in which a node can use a carrier to provide services, and a "cell" of radio resources is associated with a bandwidth (BW) which is a frequency range configured by a carrier. Since the DL coverage (the range in which a node can send a valid signal) and the UL coverage (the range in which a node can receive a valid signal from a UE) depend on the carrier that carries the signal, the coverage of a node may also be associated with the coverage of a "cell" of radio resources used by the node. Therefore, the term "cell" may be used to indicate the service coverage of a node at times, to indicate a radio resource at other times, or to indicate a range that a signal using a radio resource can reach with effective strength at other times.

[0060] In the 3GPP communication standard, the concept of a cell is used to manage radio resources. A "cell" associated with a radio resource is defined by a combination of DL resources and UL resources (i.e., a combination of DL component carriers (CCs) and UL CCs). A cell may be configured only by DL resources, or by a combination of DL resources and UL resources. If carrier aggregation is supported, the link between the carrier frequency of a DL resource (or DL ​​CC) and the carrier frequency of a UL resource (or UL CC) may be indicated by system information. For example, the combination of DL resources and UL resources may be indicated by a system information block type 2 (SIB2) link. In this case, the carrier frequency may be equal to or different from the center frequency of each cell or CC. When carrier aggregation (CA) is configured, the UE has only one radio resource control (RRC) connection with the network. During RRC connection establishment / reestablishment / handover, one serving cell provides non-access layer (NAS) mobility information. During RRC connection reestablishment / handover, one serving cell provides security input. The cell is called a primary cell (Pcell). Pcell refers to a cell operating on the primary frequency where the UE performs an initial connection establishment process or initiates a connection reestablishment process. According to the UE capabilities, the secondary cell (Scell) can be configured to form a set of serving cells together with the Pcell. The Scell ​​can be configured after the RRC connection establishment is completed and is used to provide additional radio resources in addition to the resources of the specific cell (SpCell). The carrier corresponding to the Pcell on the DL is called the downlink primary CC (DL PCC), and the carrier corresponding to the Pcell on the UL is called the uplink primary CC (UL PCC). The carrier corresponding to the Scell ​​on the DL is called the downlink secondary CC (DL SCC), and the carrier corresponding to the Scell ​​on the UL is called the uplink secondary CC (UL SCC).

[0061] For dual connectivity (DC) operation, the term primary SCG cell (PSCell) refers to the secondary cell group (SCG) cell to which the UE performs random access when performing RRC reconfiguration and synchronization processes.

[0062] In dual connectivity (DC) operation, the term special cell (SpCell) refers to the Pcell of the main cell group (MCG) or the Pcell of the secondary cell group (SCG). SpCell supports PUCCH transmission and contention-based random access and is always enabled. MCG is a group of service cells associated with a master node (e.g., BS) and includes SpCell (Pcell) and optionally one or more Scells. For a UE configured with DC, SCG is a subset of the service cells associated with the secondary node and includes PSCell and 0 or more Scells. For a UE in RRC_CONNECTED state that is not configured with CA or DC, there is only one service cell that includes only Pcell. For a UE in RRC_CONNECTED state that is configured with CA or DC, the term service cell refers to a set of cells including SpCell and all Scells. In DC, two medium access control (MAC) entities are configured for the UE, i.e., one MAC entity for MCG and one MAC entity for SCG.

[0063] For a UE configured with CA but not with DC, a PcellPUCCH group including a Pcell and 0 or more Scells and a Scell ​​PUCCH group including only Scells may be configured. In the case of an Scell, an Scell ​​of a PUCCH related to a corresponding cell (hereinafter referred to as a PUCCH cell) may be configured. An Scell ​​indicating a PUCCH Scell ​​belongs to a Scell ​​PUCCH group and performs PUCCH transmission of related UCI on the PUCCH Scell, an Scell ​​not indicating a PUCCH Scell ​​or indicating a Pcell as a cell for PUCCH transmission belongs to a Pcell PUCCH group and performs PUCCH transmission of related UCI on the PUCCH Scell.

[0064] In a wireless communication system, a UE receives information from a BS on DL, and a UE transmits information to a BS on UL. The information transmitted and / or received by the BS and the UE includes data and various control information, and there are various physical channels according to the type / purpose of the information transmitted and / or received by the UE and the BS.

[0065] The communication standards based on 3GPP define DL physical channels corresponding to resource elements carrying information from high layers and DL physical signals corresponding to resource elements used by the physical layer but not carrying information from high layers. For example, physical downlink shared channel (PDSCH), physical broadcast channel (PBCH), physical multicast channel (PMCH), physical control format indicator channel (PCFICH), physical downlink control channel (PDCCH), etc. are defined as DL physical channels, and reference signals (RS) and synchronization signals are defined as DL physical signals. RS (also called pilot) represents a signal with a predefined special waveform known to both BS and UE. For example, demodulation reference signal (DMRS), channel state information RS (CSI-RS), positioning reference signal (PRS), etc. are defined as DL RS. The communication standards based on 3GPP define UL physical channels corresponding to resource elements carrying information from high layers and UL physical signals corresponding to resource elements used by the physical layer but not carrying information from high layers. For example, a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), and a physical random access channel (PRACH) are defined as UL physical channels, and a DMRS for UL control / data signals, a sounding reference signal (SRS) for UL channel measurement, etc. are defined.

[0066] In the present disclosure, PDCCH refers to a set of time-frequency resources (e.g., resource elements (REs)) carrying downlink control information (DCI), and PDSCH refers to a set of time-frequency resources carrying DL data. PUCCH, PUSCH, and PRACH refer to a set of time-frequency resources carrying UCI, a set of time-frequency resources carrying UL data, and a set of time-frequency resources carrying random access signals, respectively. In the following description, "UE sends / receives PUSCH / PUCCH / PRACH" is used as the same meaning as the UE sends / receives UCI / UL data / random access signals on or through PUCCH / PUSCH / PRACH, respectively. In addition, "BS sends / receives PBCH / PDCCH / PDSCH" is used as the same meaning as the BS sends broadcast information / DL data / DL control information on or through PBCH / PDCCH / PDSCH, respectively.

[0067] As more and more communication devices require greater communication capacity, eMBB communication relative to traditional radio access technology (RAT) is needed. In addition, large-scale MTC, which provides various services anytime and anywhere by connecting multiple devices and objects to each other, is a major issue to be considered in the next generation of communications. In addition, the design of communication systems that take into account services / UEs that are sensitive to reliability and delay is also being discussed. Considering eMBB communication, large-scale MTC, ultra-reliable low-latency communication (URLLC), etc., the introduction of the next generation RAT is being discussed. Currently, in 3GPP, research on the next generation mobile communication system after EPC is underway. In this disclosure, for convenience, the corresponding technology is referred to as a new RAT (NR) or a fifth generation (5G) RAT, and a system using NR or supporting NR is referred to as an NR system.

[0068] Figure 1 An example of a communication system 1 to which an implementation of the present disclosure is applied is shown.

[0069] Reference Figure 1 , the communication system 1 applied to the present disclosure includes a wireless device, a BS, and a network. Here, the wireless device refers to a device that performs communication using a RAT (e.g., 5G NR or LTE (e.g., E-UTRA)), and may be referred to as a communication / radio / 5G device. The wireless device may include (but is not limited to) a robot 100a, a vehicle 100b-1 and 100b-2, an extended reality (XR) device 100c, a handheld device 100d, a home appliance 100e, an Internet of Things (IoT) device 100f, and an artificial intelligence (AI) device / server 400. For example, a vehicle may include a vehicle with a wireless communication function, an autonomous driving vehicle, and a vehicle capable of performing vehicle-to-vehicle communication. Here, a vehicle may include an unmanned aerial vehicle (UAV) (e.g., a drone). The XR device may include 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) installed in a vehicle, a television, a smart phone, a computer, a wearable device, a home appliance device, a digital signage, a vehicle, a robot, and the like. Handheld devices may include smart phones, smart boards, wearable devices (e.g., smart watches or smart glasses), and computers (e.g., notebooks). Home appliances may include TVs, refrigerators, and washing machines. IoT devices may include sensors and smart meters. For example, BSs and networks may also be implemented as wireless devices, and a specific wireless device 200a may operate as a BS / network node relative to another wireless device.

[0070] The wireless devices 100a to 100f may be connected to the network 300 via the BS 200. The AI ​​technology may be applied to the wireless devices 100a to 100f, and the wireless devices 100a to 100f may be connected to the AI ​​server 400 via the network 300. The network 300 may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G (e.g., NR) network. Although the wireless devices 100a to 100f may communicate with each other via the BS 200 / network 300, the wireless devices 100a to 100f may perform direct communication (e.g., side link communication) with each other without passing through the BS / network. For example, vehicles 100b-1 and 100b-2 may perform direct communication (e.g., vehicle-to-vehicle (V2V) / vehicle-to-everything (V2X) communication). An IoT device (e.g., a sensor) may perform direct communication with other IoT devices (e.g., a sensor) or other wireless devices 100a to 100f.

[0071] Wireless communication / connection 150a and 150b may be established between wireless devices 100a to 100f and BS200, and between wireless devices 100a to 100f. Here, wireless communication / connection such as UL / DL communication 150a and sidelink communication 150b (or device-to-device (D2D) communication) may be established through various RATs (e.g., 5G NR). The wireless device and the BS / wireless device may send / receive radio signals to / from each other through wireless communication / connection 150a and 150b. To this end, various configuration information configuration processes for sending / receiving radio signals, various signal processing processes (e.g., channel coding / decoding, modulation / demodulation, and resource mapping / demapping), and at least a portion of a resource allocation process may be performed based on various proposals of the present disclosure.

[0072] Figure 2 is a block diagram illustrating an example of a communication device capable of executing the method according to the present disclosure.

[0073] Reference Figure 2 , the first wireless device 100 and the second wireless device 200 may transmit and / or receive radio signals through various RATs (e.g., LTE and NR). Here, {the first wireless device 100 and the second wireless device 200} may correspond to Figure 1 {wireless device 100x and BS 200} and / or {wireless device 100x and wireless device 100x}.

[0074] The first wireless device 100 may include one or more processors 102 and one or more memories 104, and further include one or more transceivers 106 and / or one or more antennas 108. The processor 102 may control the memory 104 and / or the transceiver 106, and may be configured to implement the functions, processes and / or methods described / proposed above. For example, the processor 102 may process the information in the memory 104 to generate first information / signals, and then transmit a radio signal including the first information / signals through the transceiver 106. The processor 102 may receive a radio signal including second information / signals through the transceiver 106, and then store information obtained by processing the second information / signals 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 execute part or all of the processes controlled by the processor 102 or store software codes including commands for executing the processes and / or methods described / proposed above. Here, the processor 102 and the memory 104 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 106 may be connected to the processor 102 and transmit and / or receive radio signals through one or more antennas 108. Each transceiver 106 may include a transmitter and / or a receiver. The transceiver 106 may be used interchangeably with a radio frequency (RF) unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0075] The second wireless device 200 may include one or more processors 202 and one or more memories 204, and further include one or more transceivers 206 and / or one or more antennas 208. The processor 202 may control the memory 204 and / or the transceiver 206, and may be configured to implement the functions, processes and / or methods described / proposed above. For example, the processor 202 may process the information in the memory 204 to generate third information / signals, and then transmit a radio signal including the third information / signals through the transceiver 206. The processor 202 may receive a radio signal including fourth information / signals through the transceiver 206, and then store information obtained by processing the fourth information / signals in the memory 204. The memory 204 may be connected to the processor 202, and may store various information related to the operation of the processor 202. For example, the memory 204 may execute part or all of the processes controlled by the processor 202 or store software codes including commands for executing the processes and / or methods described / proposed above. Here, the processor 202 and the memory 204 may be part of a communication modem / circuit / chip designed to implement a RAT (e.g., LTE or NR). The transceiver 206 may be connected to the processor 202 and transmit and / or receive radio signals through one or more antennas 208. Each transceiver 206 may include a transmitter and / or a receiver. The transceiver 206 may be used interchangeably with an RF unit. In the present disclosure, a wireless device may represent a communication modem / circuit / chip.

[0076] Hereinafter, the hardware elements of the wireless devices 100 and 200 will be described in more detail. One or more protocol layers may be implemented by (but not limited to) one or more processors 102 and 202. For example, one or more processors 102 and 202 may implement one or more layers (e.g., functional layers such as a physical (PHY) layer, a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer, a radio resource control (RRC) layer, and a service data adaptation protocol (SDAP) layer). One or more processors 102 and 202 may generate one or more protocol data units (PDUs) and / or one or more service data units (SDUs) according to the functions, procedures, proposals, and / or methods disclosed in the present disclosure. One or more processors 102 and 202 may generate messages, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in the present disclosure. One or more processors 102 and 202 may generate a signal (e.g., a baseband signal) including a PDU, an SDU, a message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in the present disclosure, and provide the generated signal to one or more transceivers 106 and 206. One or more processors 102 and 202 may receive a signal (e.g., a baseband signal) from one or more transceivers 106 and 206 and obtain the PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in the present disclosure.

[0077] One or more processors 102 and 202 may be referred to as controllers, microcontrollers, microprocessors, or microcomputers. One or more processors 102 and 202 may be implemented by hardware, firmware, software, or a combination thereof. As an 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 and 202. The functions, processes, proposals, and / or methods disclosed in the present disclosure may be implemented using firmware or software, and the firmware or software may be configured to include modules, processes, or functions. Firmware or software configured to perform the functions, processes, proposals, and / or methods disclosed in the present disclosure may be included in one or more processors 102 and 202 or stored in one or more memories 104 and 204 to be driven by one or more processors 102 and 202. The functions, processes, proposals, and / or methods disclosed in the present disclosure may be implemented using firmware or software in the form of code, commands, and / or command sets.

[0078] One or more memories 104 and 204 may be connected to one or more processors 102 and 202 and store various types of data, signals, messages, information, programs, codes, commands and / or instructions. One or more memories 104 and 204 may be configured by read-only memory (ROM), random access memory (RAM), electrically erasable programmable read-only memory (EPROM), flash memory, hard disk drive, register, cache memory, computer-readable storage medium and / or a combination thereof. One or more memories 104 and 204 may be located inside and / or outside of one or more processors 102 and 202. One or more memories 104 and 204 may be connected to one or more processors 102 and 202 by various technologies such as wired or wireless connections.

[0079] One or more transceivers 106 and 206 may send the user data, control information and / or radio signal / channel mentioned in the method and / or operation flow chart of the present disclosure to one or more other devices. One or more transceivers 106 and 206 may receive the user data, control information and / or radio signal / channel mentioned in the function, process, proposal, method and / or operation flow chart disclosed in the present disclosure from one or more other devices. For example, one or more transceivers 106 and 206 may be connected to one or more processors 102 and 202 and send and receive radio signals. For example, one or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may send user data, control information or radio signal to one or more other devices. One or more processors 102 and 202 may perform control so that one or more transceivers 106 and 206 may receive user data, control information or radio signal from one or more other devices. One or more transceivers 106 and 206 may be connected to one or more antennas 108 and 208. One or more transceivers 106 and 206 may be configured to send and receive user data, control information and / or radio signals / channels mentioned in the functional, process, proposal, method and / or operation flow chart disclosed in the present disclosure through one or more antennas 108 and 208. In the present disclosure, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers 106 and 206 may convert received radio signals / channels, etc. from RF band signals to baseband signals so as to process received user data, control information, radio signals / channels, etc. using one or more processors 102 and 202. One or more transceivers 106 and 206 may convert user data, control information, radio signals / channels, etc. processed using one or more processors 102 and 202 from baseband signals to RF band signals. To this end, one or more of the transceivers 106 and 206 may include (analog) oscillators and / or filters.

[0080] Figure 3 Another example of a wireless device capable of performing implementations of the present disclosure is shown.

[0081] Reference Figure 3 , the wireless devices 100 and 200 may correspond to Figure 2 The wireless devices 100 and 200 of the present invention may be configured by various elements, components, units / parts and / or modules. For example, each of the wireless devices 100 and 200 may include a communication unit 110, a control unit 120, a memory unit 130 and an additional component 140. The communication unit may include a communication circuit 112 and a transceiver 114. For example, the communication circuit 112 may include Figure 2One or more processors 102 and 202 and / or one or more memories 104 and 204. For example, the transceiver 114 may include Figure 2 The control unit 120 is electrically connected to the communication unit 110, the memory 130, and the additional components 140, and controls the overall operation of the wireless device. For example, the control unit 120 may control the electrical / mechanical operation of the wireless device based on the program / code / command / information stored in the memory unit 130. The control unit 120 may send information stored in the memory unit 130 to the outside (e.g., other communication devices) via the communication unit 110 through a wireless / wired interface, or store information received from the outside (e.g., other communication devices) via the communication unit 110 in the memory unit 130 through a wireless / wired interface.

[0082] The additional components 140 may be configured differently depending on the type of wireless device. For example, the additional components 140 may include at least one of a power supply unit / battery, an input / output (I / O) unit, a drive unit, and a computing unit. The wireless device may be configured in the form of, but not limited to, a robot ( Figure 1 100a), vehicles ( Figure 1 100b-1 and 100b-2), XR devices ( Figure 1 100c), handheld device ( Figure 1 100d), household appliances ( Figure 1 100e), IoT devices ( Figure 1 100f), digital broadcast UE, holographic device, public safety device, MTC device, medical device, fintech device (or financial device), security device, climate / environmental device, AI server / device ( Figure 1 400), BS( Figure 1 200), network nodes, etc. The wireless device can be used in a mobile or fixed location depending on the usage / service.

[0083] exist Figure 3In the wireless devices 100 and 200, various elements, components, units / parts and / or modules in the wireless devices 100 and 200 may all be connected to each other through a wired interface, or at least a part thereof may be wirelessly connected through the communication unit 110. For example, in each of the wireless devices 100 and 200, the control unit 120 and the communication unit 110 may be wired, and the control unit 120 and the first unit (e.g., 130 and 140) may be wirelessly connected through the communication unit 110. The various elements, components, units / parts and / or modules within the wireless devices 100 and 200 may also include one or more elements. For example, the control unit 120 may be configured by a collection of one or more processors. As an example, the control unit 120 may be configured by a collection of a communication control processor, an application processor, an electronic control unit (ECU), a graphics processing unit and a memory control processor. As another example, the memory 130 may be configured by a random access memory (RAM), a dynamic RAM (DRAM), a read-only memory (ROM)), a flash memory, a volatile memory, a non-temporary memory and / or a combination thereof.

[0084] In the present disclosure, at least one memory (e.g., 104 or 204) may store instructions or programs, and these instructions or programs, when executed, may cause at least one processor operatively connected to the at least one memory to perform operations according to some embodiments or implementations of the present disclosure.

[0085] In the present disclosure, a computer-readable storage medium may store at least one instruction or program, and when the at least one instruction or program is executed by at least one processor, the at least one processor may cause the at least one processor to perform operations according to some embodiments or implementations of the present disclosure.

[0086] In the present disclosure, a processing device or apparatus may include at least one processor and at least one computer memory operatively connected to the at least one processor. The at least one computer memory may store instructions or programs, and these instructions or programs, when executed, may cause at least one processor operatively connected to the at least one memory to perform operations according to some embodiments or implementations of the present disclosure.

[0087] The communication device of the present disclosure includes: at least one processor; and at least one computer memory, which is operatively connected to the at least one processor and configured to store instructions, which when executed cause the at least one processor to perform operations according to examples of the present disclosure described later.

[0088] Figure 4 An example of a frame structure used in a 3GPP-based wireless communication system is shown.

[0089] Figure 4The frame structure is only exemplary, and the number of subframes, the number of time slots, and the number of symbols in the frame may be changed differently. In the NR system, different OFDM parameter sets (e.g., subcarrier spacing (SCS)) may be configured for multiple cells aggregated for one UE. Therefore, the (absolute time) duration of time resources including the same number of symbols (e.g., subframes, time slots, or transmission time intervals (TTIs)) may be configured differently for the aggregated cells. Here, the symbol may include an OFDM symbol (or a cyclic prefix-OFDM (CP-OFDM) symbol) and an SC-FDMA symbol (or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) symbol). In the present disclosure, symbols, OFDM-based symbols, OFDM symbols, CP-OFDM symbols, and DFT-s-OFDM symbols may be used interchangeably.

[0090] Reference Figure 4 In the NR system, UL transmission and DL transmission are organized into frames. Each frame has T f =(△f max *N f / 100)*T c = 10 ms duration and is divided into two half frames of 5 ms each. The basic time unit of NR is T c =1 / (△f max *N f ), where △f max =480*10 3 Hz and N f =4096. For reference, the basic time unit of LTE is T s =1 / (△f ref *N f,ref ), where △f ref =15*10 3 Hz and N f,ref =2048. c and T f With constant κ = T c / T f =64. Each half frame includes 5 subframes, and the duration of a single subframe is T sf The subframe is further divided into slots, and the number of slots in a subframe depends on the subcarrier spacing. Each slot includes 14 or 12 OFDM symbols based on the cyclic prefix. In normal CP, each slot includes 14 OFDM symbols, and in extended CP, each slot includes 12 OFDM symbols. The parameter set depends on the exponentially scalable subcarrier spacing △f=2 u *15kHz. The following table shows the number of OFDM symbols per time slot (N slot symb), the number of time slots per frame (N frame,u slot ) and the number of time slots per subframe (N subframe,u slot ).

[0091] [Table 1]

[0092] u <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 0 14 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

[0093] The following table shows the subcarrier spacing △f = 2 u *15kHz, number of OFDM symbols per slot, number of slots per frame and number of slots per subframe.

[0094] [Table 2]

[0095] u <![CDATA[N slot symb ]]> <![CDATA[N frame,u slot ]]> <![CDATA[N subframe,u slot ]]> 2 12 40 4

[0096] The NR band is defined as two frequency ranges, namely, FR1 and FR2. FR2 is also known as millimeter wave (mmW). The following table shows the frequency range in which NR can operate.

[0097] [Table 3]

[0098] Frequency range specification Corresponding frequency range Subcarrier spacing FR1 410MHz-7125MHz 15, 30, 60kHz FR2 24250MHz-52600MHz 60, 120, 240kHz

[0099] Figure 5 A resource grid showing time slots.

[0100] A slot includes multiple (e.g., 14 or 12) symbols in the time domain. For each parameter set (e.g., subcarrier spacing) and carrier, a common resource block (CRB) N indicated by higher layer signaling (e.g., RRC signaling) is allocated. start,u grid Begins to define N size,u grid,x *N RB sc subcarriers and N subframe,u symb OFDM symbol resource grid, where N size,u grid,x is the number of resource blocks (RBs) in the resource grid, and the subscript x is DL for the downlink and UL for the uplink. N RB sc is the number of subcarriers per RB. In 3GPP-based wireless communication systems, N RB sc Typically 12. For a given antenna port p, subcarrier spacing configuration u, and transmission link (DL or UL), there is one resource grid. The carrier bandwidth N for subcarrier spacing configuration u is given to the UE through higher-layer parameters (e.g., RRC parameters) size,ugrid . Each element in the resource grid for antenna port p and subcarrier spacing configuration u is called a resource element (RE), and one complex symbol can be mapped to each RE. Each RE in the resource grid is uniquely identified by an index k in the frequency domain and an index l representing the symbol position relative to a reference point in the time domain. In the NR system, an RB is defined by 12 consecutive subcarriers in the frequency domain. In the NR system, RBs are classified into CRBs and physical resource blocks (PRBs). For SCS configuration u, CRBs are numbered from 0 upwards in the frequency domain. The center of subcarrier 0 of CRB 0 of subcarrier spacing configuration u is equal to "point A" used as a common reference point for the RB grid. PRBs are defined within a bandwidth part (BWP) and are numbered from 0 to N size BWP,i -1 numbering, where i is the number of BWPs. PRB n in BWP i PRB With CRB CRB The relationship between n PRB＝ n CRB+ N size BWP,i Given, where N size BWP,i is the CRB where the BWP starts relative to CRB 0. A BWP includes multiple consecutive RBs in the frequency domain. A carrier may include up to N (e.g., 5) BWPs. A UE may be configured with one or more BWPs on a given component carrier. Data communication is performed through enabled BWPs, and only a predetermined number of BWPs (e.g., one BWP) among the BWPs configured for the UE may be active on the component carrier.

[0101] Hereinafter, physical channels available in a 3GPP-based wireless communication system will be described in detail.

[0102] PDCCH carries DCI. For example, PDCCH (i.e., DCI) carries information about the transmission format and resource allocation of the downlink shared channel (DL-SCH), information about the resource allocation of the uplink shared channel (UL-SCH), paging information about the paging channel (PCH), system information about DL-SCH, resource allocation information of control messages of a layer higher than the physical layer (hereinafter, high layer) in the protocol stack of UE / BS (e.g., random access response (RAR) sent on PDSCH), transmission power control commands, information about the activation / deactivation of configuration scheduling (CS), etc. DCI including resource allocation information about DL-SCH is called PDSCH scheduling DCI, and DCI including resource allocation information about UL-SCH is called PUSCH scheduling DCI. DCI includes a cyclic redundancy check (CRC). The CRC is masked / scrambled with various identifiers (e.g., radio network temporary identifier (RNTI)) according to the owner and purpose of the PDCCH. For example, if the PDCCH is for a specific UE, the CRS is masked with a UE identifier (e.g., cell-RNTI (C-RNTI)). If the PDCCH is for a paging message, the CRC is masked with a paging RNTI (P-RNTI). If the PDCCH is for system information (e.g., system information block (SIB)), the CRC is masked with a system information RNTI (SI-RNTI). If the PDCCH is for a random access response, the CRC is masked with a random access-RNTI (RA-RNTI).

[0103] When the PDCCH on one serving cell schedules the PDSCH or PUSCH on another serving cell, it is called cross-carrier scheduling. Cross-carrier scheduling with a carrier indicator field (CIF) allows the PDCCH on the serving cell to schedule resources on another serving cell. When the PDSCH on the serving cell schedules the PDSCH or PUSCH on the serving cell, it is called self-carrier scheduling. When cross-carrier scheduling is used in a cell, the BS may provide information about the cell of the scheduling cell to the UE. For example, the BS may inform the UE whether the serving cell is scheduled by the PDCCH on another (scheduling) cell or by the serving cell. If the serving cell is scheduled by another (scheduling) cell, the BS may inform the UE which cell signals the DL assignment and UL grant of the serving cell. In the present disclosure, the cell carrying the PDCCH is referred to as the scheduling cell, and the cell whose transmission of the PUSCH or PDSCH is scheduled by the DCI included in the PDCCH (i.e., the cell carrying the PUSCH or PDSCH scheduled by the PDCCH) is referred to as the scheduled cell.

[0104] PDCCH is sent via a control resource set (CORESET). One or more CORESETs may be configured for a UE. CORESET is determined based on the following parameters.

[0105] -controlResourceSetId: ID of CORESET.

[0106] -frequencyDomainResources: Frequency domain resources of CORESET. The frequency domain resources of CORESET are indicated by a bitmap, and each bit corresponds to an RB group (six consecutive RBs). For example, the most significant bit (MSB) of the bitmap corresponds to the first RB group in the BWP. The RB group corresponding to the bit with a bit value of 1 is allocated to the frequency domain resources of CORESET.

[0107] -duration: The time domain resource of CORESET. The time domain resource of CORESET indicates the number of consecutive OFDMA symbols constituting CORESET. For example, duration has a value of 1 to 3.

[0108] -cce-REG-MappingType: CCE to REG mapping type. Supports interleaved and non-interleaved types.

[0109] -precoderGranularity: Precoder granularity in the frequency domain.

[0110] -tci-StatesPDCCH: Information indicating the transmission configuration indication (TCI) state of the PDCCH (eg, TCI-StateID). The TCI state is used to provide a quasi-co-location (QCL) relationship (TCI-state) between DL RS and PDCCH DMRS ports within an RS set.

[0111] -tci-PresentInDCI: Whether the TCI field is included in the DCI.

[0112] -pdcch-DMRS-ScramblingID: information used to initialize the PDCCH DMRS scrambling sequence.

[0113] A CORESET may be defined and / or configured as a set of time-frequency resources in which a UE can monitor a PDCCH. A UE may be configured with one or more CORESETs. A CORESET has a duration of one to three OFDM symbols and includes a set of PRBs. The PRBs included in the CORESET and the CORESET duration may be provided to the UE via high-level (e.g., RRC) signaling. The UE may monitor a set of PDCCH candidates in the configured CORESET according to a corresponding search space set. In the present disclosure, monitoring means decoding (blind decoding) of each PDCCH candidate based on the monitored DCI format. The MIB on the PBCH provides the UE with parameters (e.g., CORESET#0 configuration) for monitoring the PDCCH that schedules the PDSCH carrying SIB1. The PBCH may indicate that there is no associated SIB1. In this case, the UE may be provided not only with a frequency range in which the UE is allowed to assume that there is no SSB associated with SSB1, but also with another frequency range in which the UE is allowed to discover SSBs associated with SIB1. As a CORESET for scheduling at least SIB1, CORESET#0 may be configured through MIB or dedicated RRC signaling.

[0114] The PDCCH candidate set monitored by the UE is defined according to the PDCCH search space set. The search space set can be a common search space (CSS) set or a UE-specific search space (USS) set. Each CORESET configuration is associated with one or more search space sets, and each search space set is associated with one CORESET configuration. The search space set is determined based on the following parameters provided by the BS to the UE.

[0115] -serachSpaceId: SS set identifier that identifies the SS set.

[0116] -controlResourceSetId: Identifies the identifier of the CORESET associated with the search space.

[0117] -monitoringSlotPeriodicityAndOffset: configures the PDCCH monitoring periodicity and PDCCH monitoring offset of the timeslot used for PDCCH monitoring.

[0118] - duration: The number of consecutive slots that last in the search space at each occasion, ie at each period, is given by monitoringSlotPeriodicityAndOffset.

[0119] - monitoringSymbolsWithinSlot: PDCCH monitoring pattern within a slot, indicating the first symbol of the CORESET within the slot used for PDCCH monitoring.

[0120] -nrofCandidates: Number of PDCCH candidates per CCE aggregation level.

[0121] The UE monitors PDCCH candidates only during the PDCCH monitoring opportunities. The UE determines the PDCCH monitoring opportunities from the PDCCH monitoring periodicity, PDCCH monitoring offset and PDCCH monitoring pattern within the time slot. The parameter monitoringSymbolsWithinSlot may indicate the first symbol used for PDCCH monitoring in the time slot configured for PDCCH monitoring (e.g., see monitoringSlotPeriodicityAndOffset and duration). For example, when monitoringSymbolsWithinSlot is a 14-bit parameter, the most significant (leftmost) bit may represent the first OFDM symbol in the time slot, and the second most significant (leftmost) bit may represent the second OFDM symbol in the time slot. In this way, the bits of monitoringSymbolsWithinSlot may represent the 14 OFDM symbols of the time slot respectively. For example, the bit set to 1 among the bits in monitoringSymbolsWithinSlot may identify the first symbol of the CORESET in the time slot.

[0122] The following table shows the search space sets and their associated RNTIs along with usage examples.

[0123] [Table 4]

[0124]

[0125] The following table shows the DCI format carried by PDCCH.

[0126] [Table 5]

[0127]

[0128] DCI format 0_0 can be used to schedule TB-based (or TB-level) PUSCH, and DCI format 0_1 ​​can be used to schedule TB-based (or TB-level) PUSCH or code block group (CBG) (or CBG level) PUSCH. DCI format 1_0 can be used to schedule TB-based (or TB-level) PDSCH, and DCI format 1_1 can be used to schedule TB-based (or TB-level) PDSCH or CBG (or CBG level) PDSCH. For CSS, after the RRC initially gives the BWP size, DCI format 0_0 and DCI format 1_0 have a fixed size. For USS, the size of the fields other than the frequency domain resource assignment (FDRA) field of DCI format 0_0 and DCI format 1_0 is fixed, and the size of the FDRA field may vary according to the relevant parameter configuration of the BS. In DCI format 0_1 ​​and DCI format 1_1, the size of the DCI field may change according to various RRC reconfigurations of the BS. DCI format 2_0 can be used to transmit dynamic slot format information (e.g., SFIDCI) to the UE, and DCI format 2_1 can be used to transmit downlink preemption information to the UE. DCI format 2_0 and / or DCI format 2_1 can be transmitted to UEs in the corresponding group via a group common PDCCH (a PDCCH transmitted to UEs defined as a group).

[0129] PDSCH is a physical layer UL channel for UL data transmission. PDSCH carries DL data (e.g., DL-SCH transport block) and is subjected to modulation such as quadrature phase shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64QAM, 256QAM, etc. Codewords are generated by encoding transport blocks (TBs). PDSCH can carry up to two codewords. Scrambling and modulation mapping of each codeword can be performed, and modulation symbols generated from each codeword can be mapped to one or more layers. Each layer is mapped to a radio resource together with DMRS and generated as an OFDM symbol signal. Then, the OFDM symbol signal is sent through the corresponding antenna port. PDSCH can be dynamically scheduled (dynamic scheduling) by PDCCH or semi-statically scheduled (configuration scheduling (CS)) based on high-level (e.g., RRC) signaling (and / or layer 1 (L1) signaling (e.g., PDCCH)). Therefore, in dynamic scheduling, PDSCH transmission accompanies PDCCH, but in CS, PDSCH transmission does not accompany PDCCH. CS includes Semi-Persistent Scheduling (SPS).

[0130] PUCCH is a physical layer UL channel used for uplink control information (UCI) transmission. PUCCH carries UCI. UCI includes the following information.

[0131] - Scheduling Request (SR): information used to request UL-SCH resources.

[0132] - Hybrid Automatic Repeat Request (HARQ) - Acknowledgement (ACK): A response to a DL data packet (e.g., a codeword) on the PDSCH. HARQ-ACK indicates whether the communication device successfully received the DL data packet. In response to a single codeword, a 1-bit HARQ-ACK may be sent. In response to two codewords, a 2-bit HARQ-ACK may be sent. HARQ-ACK responses include positive ACK (abbreviated as ACK), negative ACK (NACK), discontinuous transmission (DTX), or NACK / DTX. Here, the term HARQ-ACK may be used interchangeably with HARQ ACK / NACK, ACK / NACK, or A / N.

[0133] - Channel State Information (CSI): Feedback information about a DL channel. CSI may include channel quality information (CQI), rank indicator (RI), precoding matrix indicator (PMI), CSI-RS resource indicator (CRI), SS / PBCH resource block indicator (SSBRI), and layer indicator (L1). According to the type of UCI included in the CSI, the CSI may be classified into CSI part 1 and CSI part 2. For example, the CRI, RI, and / or CQI of the first codeword may be included in CSI part 1, and the LI, PMI, and / or CQI of the second codeword may be included in CSI part 2.

[0134] In the present disclosure, for convenience, the PUCCH resources configured / indicated by the BS for / to the UE for HARQ-ACK, SR, and CSI transmission are respectively referred to as HARQ-ACK PUCCH resources, SR PUCCH resources, and CSI PUCCH resources.

[0135] According to the UCI payload size and / or transmission length (eg, the number of symbols included in the PUCCH resource), the PUCCH format may be defined as follows: For the PUCCH format, reference may also be made to Table 6.

[0136] (0) PUCCH format 0 (PF0 or F0)

[0137] - Supported UCI payload size: up to K bits (e.g., K=2)

[0138] -The number of OFDM symbols constituting a single PUCCH: 1 to X symbols (e.g., X=2)

[0139] -Transmission structure: Only UCI signal without DMRS is included in PUCCH format 0. UE sends UCI status by selecting and sending one of multiple sequences. For example, UE sends specific UCI to BS by sending one of multiple sequences via PUCCH (PUCCH format 0). UE sends PUCCH (PUCCH format 0) in PUCCH resources for corresponding SR configuration only when sending positive SR.

[0140] - The configuration of PUCCH format 0 includes the following parameters corresponding to the PUCCH resource: the index of the initial cyclic shift, the number of symbols used for PUCCH transmission and / or the first symbol used for PUCCH transmission.

[0141] (1) PUCCH format 1 (PF1 or F1)

[0142] - Supported UCI payload size: up to K bits (e.g., K=2)

[0143] -The number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y=4 and Z=14)

[0144] -Transmission structure: DMRS and UCI are configured / mapped to different OFDM symbols by TDM. In other words, DMRS is transmitted in symbols where modulation symbols are not transmitted, and UCI is expressed as the product between a specific sequence (e.g., orthogonal cover code (OCC)) and a modulation (e.g., QPSK) symbol. Code division multiplexing (CDM) is supported between multiple PUCCH resources (compliant with PUCCH format 1) (within the same RB) by applying cyclic shift (CS) / OCC to both UCI and DMRS. PUCCH format 1 carries up to 2 bits of UCI, and modulation symbols are spread in the time domain by OCC (configured differently depending on whether frequency hopping is performed).

[0145] - The configuration of PUCCH format 1 includes the following parameters corresponding to the PUCCH resource: the index of the initial cyclic shift, the number of symbols used for PUCCH transmission, the first symbol used for PUCCH transmission and / or the index of the OCC.

[0146] (2) PUCCH format 2 (PF2 or F2)

[0147] - Supported UCI payload size: more than K bits (e.g., K=2)

[0148] -The number of OFDM symbols constituting a single PUCCH: 1 to X symbols (e.g., X=2)

[0149] -Transmission structure: DMRS and UCI are configured / mapped using frequency division multiplexing (FDM) within the same symbol. The UE transmits UCI by applying IFFT without DFT to the coded UCI bits. PUCCH format 2 carries UCI of a larger bit size than K bits, and the modulation symbols are subjected to FDM with DMRS for transmission. For example, DMRS is located in symbol indexes #1, #4, #7, and #10 within a given RB with a density of 1 / 3. Pseudo-noise (PN) sequences are used for DMRS sequences. Frequency hopping can be enabled for 2-symbol PUCCH format 2.

[0150] - The configuration of PUCCH format 2 includes the following parameters corresponding to the PUCCH resources: the number of PRBs, the number of symbols used for PUCCH transmission and / or the first symbol used for PUCCH transmission.

[0151] (3) PUCCH format 3 (PF3 or F3)

[0152] - Supported UCI payload size: more than K bits (e.g., K=2)

[0153] -The number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y=4 and Z=14)

[0154] - Transmission structure: DMRS and UCI are configured / mapped to different OFDM symbols by TDM. UE transmits UCI by applying DFT to the coded UCI bits. PUCCH format 3 does not support UE multiplexing for the same time-frequency resource (eg, the same PRB).

[0155] - The configuration of PUCCH format 3 includes the following parameters corresponding to the PUCCH resources: the number of PRBs, the number of symbols used for PUCCH transmission and / or the first symbol used for PUCCH transmission.

[0156] (4) PUCCH format 4 (PF4 or F4)

[0157] - Supported UCI payload size: more than K bits (e.g., K=2)

[0158] -The number of OFDM symbols constituting a single PUCCH: Y to Z symbols (e.g., Y=4 and Z=14)

[0159] -Transmission structure: DMRS and UCI are configured / mapped to different OFDM symbols by TDM. By applying OCC in the front end of DFT and applying CS (or interleaved FDM (IFDM) mapping) to DMRS, PUCCH format 4 can multiplex up to 4 UEs in the same PRB. In other words, the modulation symbol of UCI is subjected to TDM with DMRS for transmission.

[0160] - The configuration of PUCCH format 4 includes the following parameters for the corresponding PUCCH resources: the number of symbols for PUCCH transmission, the length of OCC, the index of OCC, and the first symbol for PUCCH transmission.

[0161] The following table shows PUCCH formats. According to the PUCCH transmission length, PUCCH formats can be divided into short PUCCH formats (format 0 and 2) and long PUCCH formats (format 1, 3, and 4).

[0162] [Table 6]

[0163]

[0164] PUCCH resources can be determined according to the UCI type (e.g., A / N, SR, or CSI). The PUCCH resources for UCI transmission can be determined based on the UCI (payload) size. For example, the BS can configure multiple PUCCH resource sets for the UE, and the UE can select a specific PUCCH resource set corresponding to a specific range according to the range of the UCI (payload) size (e.g., the number of UCI bits). For example, the UE can select one of the following PUCCH resource sets according to the number of UCI bits N UCI from the following.

[0165] - PUCCH resource set #0, if the number of UCI bits = <2

[0166] - PUCCH resource set #1, if 2 < the number of UCI bits = <N 1 ...

[0168] - PUCCH resource set #(K - 1), if N K-2 < the number of UCI bits = <N K-1

[0169] Here, K represents the number of PUCCH resource sets (K > 1), and N i represents the maximum number of UCI bits supported by PUCCH resource set #i. For example, PUCCH resource set #1 can include resources for PUCCH formats 0 to 1, and other PUCCH resource sets can include resources for PUCCH formats 2 to 4.

[0170] The configuration of each PUCCH resource includes the configuration of a PUCCH resource index, a starting PRB index, and one of PUCCH formats 0 to PUCCH formats 4. The BS configures the UE, through the high-level parameter maxCodeRate, the code rate for multiplexing HARQ-ACK, SR, and CSI reports within a PUCCH transmission using PUCCH format 2, PUCCH format 3, or PUCCH format 4. The high-level parameter maxCodeRate is used to determine how to feed back UCI on a PUCCH resource of PUCCH format 2, 3, or 4.

[0171] If the UCI type is SR and CSI, the PUCCH resources to be used for UCI transmission in the PUCCH resource set may be configured for the UE through high-layer signaling (e.g., RRC signaling). If the UCI type is HARQ-ACK for a semi-persistently scheduled (SPS) PDSCH, the PUCCH resources to be used for UCI transmission in the PUCCH resource set may be configured for the UE through high-layer signaling (e.g., RRC signaling). On the other hand, if the UCI type is HARQ-ACK for a PDSCH scheduled by DCI, the PUCCH resources to be used for UCI transmission in the PUCCH resource set may be scheduled by DCI.

[0172] In the case of DCI-based PUCCH resource scheduling, the BS may send DCI to the UE on the PDCCH and indicate the PUCCH resources to be used for UCI transmission in a specific PUCCH resource set through an ACK / NACK resource indicator (ARI) in the DCI. The ARI may be used to indicate the PUCCH resources used for ACK / NACK transmission and is also referred to as a PUCCH resource indicator (PRI). Here, the DCI may be used for PDSCH scheduling and the UCI may include HARQ-ACK for the PDSCH. The BS may configure a PUCCH resource set including a greater number of PUCCH resources than the state that the ARI can represent for the UE through (UE-specific) high-level (e.g., RRC) signaling. The ARI may indicate a PUCCH resource subset of the PUCCH resource set, and which PUCCH resource in the indicated PUCCH resource subset to be used may be determined according to an implicit rule based on transmission resource information about the PDCCH (e.g., the starting CCE index of the PDCCH).

[0173] For UL-SCH data transmission, the UE should include UL resources available to the UE, and for DL-SCH data reception, the UE should include DL resources available to the UE. The BS assigns UL resources and DL resources to the UE through resource allocation. Resource allocation may include time domain resource allocation (TDRA) and frequency domain resource allocation (FDRA). In the present disclosure, UL resource allocation is also referred to as UL grant, and DL resource allocation is referred to as DL assignment. The UL grant is dynamically received by the UE on the PDCCH or in the RAR, or semi-persistently configured by the BS for the UE through RRC signaling. The DL assignment is dynamically received by the UE on the PDCCH, or semi-persistently configured by the BS for the UE through RRC signaling.

[0174] On the UL, the BS can dynamically allocate UL resources to the UE via a PDCCH addressed to a cell radio network temporary identifier (C-RNTI). The UE monitors the PDCCH to discover possible UL grants for UL transmission. The BS can use a configuration grant to allocate UL resources to the UE. Two types of configuration grants can be used, type 1 and type 2. In type 1, the BS directly provides the configured UL grant (including periodicity) through RRC signaling. In type 2, the BS can configure the periodicity of the RRC-configured UL grant through RRC signaling, and signal, enable or disable the configured UL grant by addressing the PDCCH to the configuration scheduling RNTI (CS-RNTI). For example, in type 2, the PDCCH addressed to the CS-RNTI indicates that until deactivation, the corresponding UL grant can be implicitly reused according to the periodicity configured by RRC signaling.

[0175] On the DL, the BS may dynamically allocate DL resources to the UE via a PDCCH addressed to the C-RNTI. The UE monitors the PDCCH to discover possible DL grants. The BS may use SPS to allocate DL resources to the UE. The BS may configure the periodicity of the configured DL assignments via RRC signaling, and signal, enable, or disable the configured DL assignments via a PDCCH addressed to the CS-RNTI. For example, the PDCCH addressed to the CS-RNTI indicates that until deactivation, the corresponding DL assignment may be implicitly reused according to the periodicity configured via RRC signaling.

[0176] The PUSCH carries UL data (e.g., UL-SCH TB) and / or UL control information (UCI), and is transmitted based on a cyclic prefix-orthogonal frequency division multiplexing (CP-OFDM) waveform or a discrete Fourier transform-spread-OFDM (DFT-s-OFDM) waveform. When the PUSCH is transmitted based on the DFT-s-OFDM waveform, the UE transmits the PUSCH by applying transform precoding. For example, when transform precoding is disabled, the UE may transmit the PUSCH based on the CP-OFDM waveform, and when transform precoding is enabled, the UE may transmit the PUSCH based on the CP-OFDM waveform or the DFT-s-OFDM waveform. The PUSCH may be dynamically scheduled by the PDCCH (dynamic scheduling) or semi-statically scheduled based on high-layer (e.g., RRC) signaling (and / or layer 1 (L1) signaling (e.g., PDCCH)) (configuration scheduling (CS)). Therefore, in dynamic scheduling, PUSCH transmission accompanies the PDCCH, but in CS, PUSCH transmission does not accompany the PDCCH. CS includes type 1 configuration grant (CG) PUSCH transmission and type 2CG PUSCH transmission. In type 1CG, all parameters of PUSCH transmission are signaled via higher layers. In type 2CG, some parameters of PUSCH transmission are signaled via higher layers, and the remaining parameters are signaled by PDCCH. Basically, in CS, PUSCH transmission is not accompanied by PDCCH.

[0177] Figure 6 The network communication processing for executing the implementation of the present disclosure is shown. In detail, Figure 6 The initial network connection and subsequent communication processing are shown.

[0178] The UE may perform network communication processing for performing the procedures and / or methods described in the present disclosure. For example, the UE may receive information and configuration information required for performing the procedures and / or methods described in the present disclosure while performing access to a network (e.g., a BS) and store the information in a memory system. The configuration information required for performing an implementation according to the present disclosure may be received via high-level (e.g., RRC layer or MAC layer) signaling.

[0179] In NR, beamforming can be used to send physical channels and reference signals. When beamforming-based signal transmission is supported, beam management processing may be involved to align the beams between the BS and the UE. In the present disclosure, beamforming may be used to send / receive signals. In radio resource control (RRC)_DLE mode, beam alignment may be performed based on SSB. On the other hand, in RRC_ONNECTED mode, beam alignment may be performed based on CSI-RS (in DL) and SRS (in UL). When beamforming-based signal transmission is not supported, beam-related operations may be omitted in the following description.

[0180] Reference Figure 6 , the BS may periodically send SSBs (S602). Here, the SSBs include PSS / SSS / PBCH. The SSBs may be sent using beam sweeping. The BS may then send the remaining minimum system information (RMSI) and other system information (OSI) (S604). The RMSI may include information required for the UE to initially access the BS (e.g., PRACH configuration information). The UE performs SSB detection and then identifies the best SSB. The UE may then send a RACH preamble (Msg1) to the BS using a PRACH resource linked / corresponding to the index (i.e., beam) of the best SSB (S606). The beam direction of the RACH preamble is related to the PRACH resource. An association between a PRACH resource (and / or a RACH preamble) and an SSB (index) may be established via system information (e.g., RMSI). Then, as part of the RACH process, the BS may send a random access response (RAR) (Msg2) (S608) in response to the RACH preamble, the UE may send Msg3 (e.g., RRC connection request) (S610) using the UL grant in the RAR, and the BS may send a contention resolution message (Msg4) (S620). Msg4 may include RRC connection establishment.

[0181] When an RRC connection is established between a BS and a UE through a RACH process, subsequent beam alignment may be performed based on SSB / CSI-RS (in DL) and SRS (in UL). For example, the UE may receive SSB / CSI-RS (S614). The UE may use SSB / CSI-RS to generate a beam / CSI report. The BS may request a beam / CSI report from the UE through DCI (S616). In this case, the UE may generate a beam / CSI report based on SSB / CSI-RS and send the generated beam / CSI report to the BS through PUSCH / PUCCH (S618). The beam / CSI report may include beam measurement results and information about a preferred beam. The BS and the UE may switch beams based on the beam / CSI report (S620a and S620b).

[0182] Then, the BS and the UE may perform the process and / or method described in the present disclosure. For example, the UE and the BS may process the information in the memory and send a wireless signal or process the received wireless signal and store the signal in the memory based on the configuration information obtained during the network access process (e.g., the system information acquisition process or the RRC connection process via the RACH) according to the proposal of the present disclosure. Here, the wireless signal may include at least one of the PDCCH, PDSCH, and reference signal (RS) for DL ​​and at least one of the PUCCH, PUSCH, and SRS for UL.

[0183] Figure 7 Discontinuous Reception (DRX) operation is shown. In particular, Figure 7 The DRX cycle of the UE in the RRC_CONNECTED state is shown.

[0184] The UE may perform DRX operation while performing the processing and / or method according to some implementations of the present disclosure. A UE configured with DRX can reduce power consumption by discontinuously receiving DL signals. DRX operation may be performed in the RRC_IDLE state, the RRC_INACTIVE state, and the RRC_CONNECTED state. In the RRC_IDLE and RRC_INACTIVE states, DRX is used to discontinuously receive paging signals. In the following, DRX performed in the RRC_CONNECTED state (RRC_CONNECTED DRX) is described.

[0185] Reference Figure 7 , the DRX cycle is configured with an on-duration and a DRX opportunity. The DRX cycle defines the time interval at which the on-duration is periodically repeated. The on-duration represents the duration that the UE monitors to receive the PDCCH. When DRX is configured, the UE performs PDCCH monitoring during the on-duration. When the PDCCH is successfully detected while monitoring the PDCCH, the UE starts an inactivity timer and maintains the timer in an awake state. On the other hand, when the PDCCH is not successfully detected while monitoring the PDCCH, the UE enters a sleep state after the on-duration ends. Therefore, when DRX is configured, PDCCH monitoring / reception may be performed discontinuously in the time domain when performing methods and / or processes according to some implementations of the present disclosure. For example, when DRX is configured, the PDCCH reception opportunity (e.g., a time slot with a PDCCH search space) may be configured discontinuously according to the DRX configuration. On the other hand, when DRX is not configured, PDCCH monitoring / reception may be performed continuously in the time domain when performing methods and / or processes according to some implementations of the present disclosure. For example, when DRX is not configured, PDCCH reception opportunities (eg, time slots with PDCCH search spaces) may be configured continuously. Regardless of whether DRX is configured, PDCCH monitoring may be limited to a duration configured as a measurement gap.

[0186] The following table shows the UE processing related to DRX. Referring to the following table, DRX configuration information is received via high-level (e.g., RRC) signaling, and DRX is controlled to be turned on / off via a DRX command of the MAC layer. When configuring DRX, the UE can Figure 7 As shown, PDCCH monitoring is performed discontinuously.

[0187] [Table 7]

[0188]

[0189] MAC-CellGroupConfig includes configuration information required to configure MAC parameters for a cell group. MAC-CellGroupConfig may also include DRX configuration information. For example, MAC-CellGroupConfig may include the following parameter information to define DRX.

[0190] -drx-OnDurationTimer: The length of the start duration of the DRX cycle, also referred to as the on-duration timer in this disclosure

[0191] -drx-SlotOffset: Delay indication of the time slot before drx-OnDurationTimer starts

[0192] -drx-StartOffset: specifies the subframe where the DRX cycle starts

[0193] -drx-InactivityTimer: The length of time that the UE remains awake after detecting a PDCCH opportunity indicating initial UL or DL ​​data, also referred to as the inactivity timer in this disclosure.

[0194] -drx-HARQ-RTT-TimerDL: Maximum duration between receiving a DL initial transmission and receiving a DL retransmission

[0195] -drx-HARQ-RTT-TimerDL: Maximum duration between receiving an UL initial transmission grant and receiving an UL retransmission grant

[0196] -drx-RetransmissionTimerDL (per DL HARQ process): the length of the maximum duration until a DL retransmission is received

[0197] -drx-RetransmissionTimerUL (per UL HARQ process): length of the maximum duration until a grant for UL retransmission is received

[0198] -drx-LongCycleStartOffset: The length and starting point of the DRX cycle

[0199] -drx-ShortCycle (optional): The length of the short DRX cycle

[0200] -drx-ShortCycleTimer (optional): Short DRX cycle operation timing

[0201] For example, the value of the multiple of the short DRX cycle may be configured by drx-CycleTimer. For example, the value of n may correspond to n*drx-ShortCycle.

[0202] If the DRX group is in the active time, the UE may perform PDCCH monitoring on the service cells within the DRX group. In this case, the DRX group refers to a group of service cells configured by RRC and having the same DRX active time. When DRX is configured, the active time of the service cells in the DRX group includes i) the time when the drx-onDurationTimer or drx-InactivityTimer configured for the DRX group is running; or ii) the drx-RetransmissionTimerDL or drx-RetransmissionTimerUL is running on any service cell in the DRX group; or the ra-ContentionResoultionTimer or msgB-RsponseWindow is running; or the time when no PDCCH indicating a new transmission of the C-RNTI sent to the MAC entity of the UE is received after successfully receiving a random access response to a random access preamble that was not selected by the MAC entity among the contention-based random access preambles.

[0203] Figure 8 The configuration of the long DRX cycle and the short DRX cycle is shown. Specifically, Figure 8 The case where drx-ShortCycleTimer is set to 2 is shown.

[0204] The BS may configure a long DRX cycle and an additional short DRX cycle that is shorter than the long DRX cycle. If the short DRX cycle is not configured, the UE may follow the long DRX cycle. When the short DRX cycle is configured, the BS may set the duration of the long DRX cycle to a positive integer multiple of the short DRX cycle. If there is no data activity during the on-duration of the long DRX cycle, the UE may follow the long DRX cycle as if the short DRX cycle was not configured. If there is data activity during the on-duration of the long DRX cycle, for example, while drx-onDurationTimer is running, the UE switches to the short DRX cycle and follows the short DRX cycle for a specific time period (for example, while drx-ShortCycleTimer is running). Reference Figure 8If there is no data activity during the time when the UE follows the short DRX cycle, for example, if there is no data activity during the period defined by drx-ShortCycleTimer*drx-ShortCycle, the UE switches from a short DRX cycle to a long DRX cycle, each having a duration of drx-ShortCycleTimer.

[0205] It is reported that compared with the LTE system, the power consumed by the NR BS is 3 to 4 times higher than that of the LTE BS due to denser BS installation and use of more antennas / bandwidth / frequency bands, etc. In order to solve the problem of increased operating costs for operators and build an environmentally friendly network, a research project to discuss methods for reducing BS energy consumption was approved.

[0206] In detail, the corresponding project considers the following enhancement techniques to improve the energy saving capability of the BS in terms of transmission and reception.

[0207] -How to more efficiently apply one or more network energy saving (NES) techniques in the time, frequency, spatial and power domains for dynamic and / or semi-static operation in transmission and reception and finer granularity adaptation based on UE assistance information and potential support / feedback from the UE.

[0208] Fig. 9 Network Energy Saving (NES) according to the present disclosure is shown.

[0209] 3GPP RAN WG1 defines an energy consumption model and simulation method for BS to show the energy consumption gain that can be obtained by applying NES technology. Fig. 9 , define the sleep state and active state of the BS, and determine the transition method of each state. Model the relative power value consumed by the BS in each state, the time required for state transition, and the energy. In the sleep state, the BS neither sends nor receives. In the active state, the BS performs transmission and / or reception.

[0210] The technologies discussed for NES in 3GPP RAN WG1 can be divided into four domains (time domain, frequency domain, space domain and power domain) as shown in the following table. The specific technologies used in each domain are shown in the following table.

[0211] The present invention discusses a method of using time domain NES technology to control the turning on and off of UE common signals (e.g., SSB, SIB, or paging) or UE specific signals (e.g., CSI-RS), a method of sending a wake-up signal from a UE to wake up a BS in an inactive state, and a method of controlling the transmission / reception of a UE according to the DTX / DRX pattern of the BS.

[0212] As a frequency domain NES technology, a method of switching an SCell and a bandwidth part (BWP) or controlling the bandwidth of a BWP without a synchronization signal block (SSB) in the case of inter-band CA is discussed.

[0213] As a spatial domain NES technology, a method of supporting on / off operation per antenna port or per transmit and receive point (TRP) of a BS and improving related CSI measurement and reporting is discussed.

[0214] As power domain NES technology, a method of dynamically changing the power of DL (e.g., SSB, CSI-RS, or PDSCH), a method of compensating for digital distortion of BS or UE, and a method of increasing transmission efficiency by maximizing power amplifier (PA) efficiency by applying a tone reservation scheme are discussed.

[0215] [Table 8]

[0216] Time Domain Technology Adaptation of common signals and channels Dynamic adaptation of UE-specific signals and channels gNB wake-up triggered by UE wake-up signal DTX / DRX Adaptation Adaptation of SSB / SIB1 Frequency Domain Technique Multi-carrier energy saving enhancement Dynamic adaptation of bandwidth portion of UE within carrier Dynamic adaptation of bandwidth of active BWP Space Domain Technology Dynamic Adaptation of Spatial Elements TRP muting / adaptation in multi-TRP operation Power Domain Technology Adaptation of signal and channel transmission power Enhancement of assisted gNB digital pre-distortion Adaptation of transceiver processing algorithms PA backoff adaptation UE post-distortion

[0217] In addition to the technologies generally discussed in 3GPP RAN WG1 and 3GPP RAN WG2, the NES technologies discussed in 3GPP RAN WG2 include a method for a UE with NES capability or an existing NR UE to access an NES cell and an efficient switching method for the UE to access an NES cell.

[0218] After the UE is initially connected to the BS and enters the connected mode, the UE may continuously monitor the PDCCH to check whether there is a transmission scheduled for the UE in each configured search space (SS). However, if the schedule does not always exist, the battery of the UE may be quickly exhausted due to each unnecessary PDCCH monitoring. Therefore, the BS may configure the connected mode discontinuous reception (C-DRX) to obtain the power saving effect of the UE by configuring the duration of performing PDCCH monitoring (on duration) and the duration of not performing PDCCH monitoring (off duration). The UE performs PDCCH monitoring within the periodically configured on duration to check whether there is DL / UL to be received / sent, and when the PDCCH is received, the UE performs DL reception or UL transmission as indicated. In the case of the UE's UL, regardless of C-DRX, when there is data to be sent in the UL buffer, the UE can wake up from the sleep mode and send an SR, and in the case of a UE in idle mode, the UE can operate in accordance with the idle mode DRX (I-DRX) that periodically performs paging monitoring and enters sleep again if the UE is not the target UE. In the present disclosure, a UE operating in sleep mode may mean a UE operating regardless of the active time determined by C-DRX or a UE operating according to a cycle other than the active time determined by C-DRX. In C-DRX operation, a duration configured as on and off durations is repeated (referred to as a DRX cycle), the length of the DRX cycle is defined as the time from the start of the on duration to the start of the next on duration, and there are long DRX cycles and short DRX cycles. When the length of the DRX cycle increases, the delay may increase because the BS needs to wait until the next on duration of the UE when a PDSCH to be sent appears immediately after the end of a specific on duration of the UE. As far as the BS is concerned, the UE does not send P-CSI or SRS during the off duration, so resources can be allocated to another UE to increase resource utilization, and the BS can also operate in energy saving mode during the off duration of the UE to save power.

[0219] The long DRX cycle and the short DRX cycle can be configured at the same time, and the long DRX cycle can be configured as an integer multiple of the short DRX cycle. In this case, the on-duration timer values ​​of the long DRX cycle and the short DRX cycle can be equal to each other. If there is no data activity (e.g., PDCCH reception) during the on period of the long DRX cycle, the operation can be performed in the long DRX cycle. If there is data activity, the operation can be performed in the short DRX cycle as long as the short DRX cycle timer (drx-ShortCycleTimer). If there is no data activity during the on-duration of the short DRX cycle, it can be switched back to the long DRX cycle. In this case, similar to the long DRX cycle, the start of the on-duration in the short DRX cycle is determined by the drx-StartOffset and drx-SlotOffet values.

[0220] In some scenarios, the BS may instruct the UE to directly enter the DRX sleep state without operating in the active mode until the on-duration ends via the DRX command MAC control element (CE). That is, the current active time may be terminated and the DRX cycle may be directly entered. When only the long DRX cycle is configured for the UE, the UE operates in the long DRX cycle mode, and when the short DRX cycle is configured, the UE immediately enters the short DRX cycle mode after receiving the DRX command MAC CE. When the BS indicates the long DRX command MAC CE, the BS may operate in the long DRX cycle mode even if the short DRX cycle is configured.

[0221] The BS can adjust the starting point of the long DRX cycle through the RRC parameter drx-LongCycleStartOffset. In this case, the offset value can be defined in ms so that the long DRX cycle can start at the time slot boundary. The BS can configure the starting point of the on-duration to the time slot level granularity through the RRC parameter drx-SlotOffset, and can define the relative position of the on-duration by applying the time slot offset indicated from the reference point indicated by drx-LongCycleStartOffset. The BS can align the on and off durations of multiple UEs in the cell by adjusting the positions of the DRX cycle starting point and the on-duration starting point through parameters and perform energy-saving operations using the aligned durations. According to some implementations of the present disclosure, the offset value can be dynamically indicated by the dynamic send / receive off time pattern of the BS to save energy.

[0222] Compared to continuously monitoring the PDCCH (e.g., every time slot), the UE can save energy by waking up from the sleep state only during the on-duration and monitoring the PDCCH through the C-DRX configuration. When the BS has no data to send during the upcoming on-duration of the UE, the BS can further save the UE's battery by sending a wake-up signal (WUS) before the start of the UE's on-duration to inform the UE that it does not need to wake up from the sleep state during the on-duration. In some scenarios, when there is no data to be sent / received to / from the UE configured with C-DRX during the upcoming on-duration, the BS may send the WUS in DCI format 2_6 in the WUS opportunity configured before the on-duration, indicating to the UE that it does not need to wake up during the corresponding on-duration. Waking up from a sleep state means switching from a sleep state to an active state. The UE that receives the WUS indication can continue to remain in the sleep state without switching to the active mode, thereby increasing the energy saving effect.

[0223] However, as far as the BS is concerned, the starting point of the DRX cycle and / or the on-duration may be different for each UE, so even if the UE enters sleep mode to save energy, the BS needs to wake up for each WUS opportunity and then go back to sleep, so the length of the sleep time may be shortened, reducing the energy saving effect. According to some implementations of the present disclosure, the BS may configure overlapping WUS opportunities for each UE. The BS may continuously configure WUS opportunities for the UE. By doing so, the BS can obtain energy saving effects by sending WUS as short as possible and ensuring a long sleep time. The BS can indicate on / off (i.e., whether the UE needs to wake up within the on-duration) within multiple on-durations through a single WUS, so that there is no need to send WUS in multiple WUS opportunities, thereby increasing the ES effect by ensuring a long sleep time.

[0224] In the present disclosure, energy saving methods and / or processes for a BS and a UE are described. For example, methods and / or processes for dynamically indicating a DRX cycle and / or an on-duration offset value to a UE configured with C-DRX are described. Methods and / or processes for skipping an on-duration via a WUS are described. For example, methods and / or processes for on / off indication of an on-duration are described with respect to skipping an on-duration via a WUS. Methods and / or processes for dynamically switching DRX parameters of an NES are described. Methods and / or processes for UE operation according to on / off durations of UE-specific DRX and / or cell-specific DRX are described.

[0225] According to some implementations of the present disclosure, for example, the BS operating in the NES mode for energy saving may mean that the BS operates in such a manner that the power consumption of the BS and the UE is reduced by configuring a plurality of off durations in which a specific DL signal is not pre-transmitted within a specific duration and dynamically indicating one of the off durations to indicate that the corresponding DL signal is not transmitted during the predefined duration. In this case, the off duration may mean a discontinuous transmission (DTX) duration of the BS. When BWP switching, dynamic RB adaptation, etc. are performed in the frequency domain as well as the time domain and when a specific receiving antenna port of the BS is semi-statically or dynamically turned off in the spatial domain, this means operating to obtain the effect of reducing the power consumption of the BS and the UE by instructing the UE to turn off the UL signal and / or channel or performing some TX antenna ports of the UL signal and / or channel received through the antenna port.

[0226] Fig.10 The operation flow of a network according to some implementations of the present disclosure is shown.

[0227] Reference Fig.10 , the BS may send information related to the NES operation of the BS to the UE (S1001). The information related to the NES operation may be information related to on / off of one or more durations or information related to whether the BS operates in the NES mode. The information related to the NES operation may be information related to the period of the DL / UL signal and / or channel depending on the NES mode. The BS may send the information related to the NES operation to the UE based on at least one DL signaling method according to some implementations of the present disclosure.

[0228] The BS and the UE may transmit and / or receive DL / UL channels in one or more durations based on the information related to the NES operation (S1003). The BS and the UE may transmit and / or receive DL / UL channels based on at least one DL signal transmission and / or reception method according to some implementations of the present disclosure.

[0229] <Implementation method 1> A method in which the BS dynamically indicates the offset value of the starting point of the DRX cycle and / or the on-duration and how many DRX cycles the corresponding offset value is to be applied (i.e., the time the offset value is maintained) through a signal in the form of a WUS before the start of the on-duration or through a UE-specific DCI or a group common DCI (GC-DCI) during the on-duration.

[0230] A separate UE-common DRX cycle for NES may be configured separately from the UE-specific DRX cycle configuration, and an offset value and an offset value duration may be indicated, or a 1-bit indicator and an offset value duration may be indicated.

[0231] The starting point and / or length of the DRX cycle and / or on-duration of a single / multiple UEs can be aligned by configuring one or more candidates for the offset value or the offset value duration and the offset value duration of the starting point of the DRX cycle and / or on-duration via a higher layer signal (e.g., RRC), and indicating one of the candidates by a signal in the form of a WUS before the start of the on-duration or by a UE-specific DCI or GC-DCI during the on-duration, or dynamically indicating one of the candidates based on the UE's identification number (hereinafter, ID) or C-RNTI.

[0232] In this case, the UE is informed of the number of UE groups (hereinafter, N) and N offsets to be applied to each group (or the index of each group) through GC-DCI and / or MAC-CE, and determines the value obtained by calculating the modulo N of its own UE ID as the index of the group to which the UE belongs, and can also align the start point and / or length of the DRX cycle and / or open segment by applying the offset configured to the corresponding group index.

[0233] When a UE has a paging group ID (a group ID of UEs monitoring the same paging occasion (PO)), the UE can be informed of the offsets of each ID via (GC-)DCI and / or (GC-)MAC CE, and can determine the starting point and / or length of the DRX cycle and / or on-duration by applying the offset configured for the paging group ID to which the UE belongs.

[0234] The on-duration of the semi-static configuration can be dynamically shifted forward / backward by the offset indicated by the WUS and the duration of the offset.

[0235] In this case, one or more candidates of a combination of an offset value and an offset value duration that can be indicated by a WUS can be configured by a high-level signal (e.g., RRC), and one of the candidates can be dynamically indicated by the WUS. The offset value duration refers to the number of DRX cycles to which the offset value is to be applied, or a specific time / duration to which the offset is to be applied. For example, a combination of an offset value per DRX on-duration unit and an offset value duration per time slot unit can be configured as a candidate. As another example, a combination of an offset value per DRX on-duration unit and an offset value duration in ms can be configured as a candidate.

[0236] In this case, the timing position of the WUS corresponding to the corresponding on-duration time may be determined in consideration of the shift degree of the on-duration time.

[0237] According to some implementations of the present disclosure, in order to solve the problem of UE missing DCI and / or MAC CE, a monitoring window may be configured, during which the UE attempts to detect DCI and / or MAC CE, and when the detection fails, the UE may maintain the previously applied offset or apply the original / default offset. For example, when the UE does not receive / misses an offset instruction, the UE may apply a previously indicated offset value or apply an original / default offset value. The time point at which the offset value is applied may be indicated as an absolute time point (e.g., a frame, a subframe, a time slot index, or a combination thereof) or a relative time point (e.g., X ms after the time point indicating the offset, or Y time slots after the time point indicating the offset) via DCI and / or MAC CE. In contrast, the problem of missing DCI and / or MAC CE may be prevented by periodically / continuously sending WUS and entering sleep mode when WUS is not detected in a specific WUS opportunity. When the duration of the offset value dynamically indicated in the method expires, the UE may automatically return to the original / default offset value, or continue to maintain the indicated offset value until a separate indication is received.

[0238] In detail, the DRX cycle and / or the starting point of the on-duration for configuring the DRX cycle may be configured differently to the UE according to the C-DRX configuration. As far as the BS is concerned, it is necessary to perform transmission / reception scheduling for each UE in the cell according to the on-duration, so the BS may not switch to sleep mode during the combined time of the on-duration of the UE, and needs to maintain the active mode. For example, when the on-duration (also called the DRX on-duration) of the first UE configured with DRX is configured from time slot 0 to time slot 5, and the on-duration of the second UE configured with DRX is configured from time slot 6 to time slot 10, the BS may need to maintain the active mode within the combined on-duration of the two UEs (i.e., from time slot 0 to time slot 10). Specific service services (e.g., XR services) may require periodic transmission. Therefore, it may be beneficial in terms of transmission efficiency and energy saving of the BS to align and transmit the on-durations of multiple UEs (also called UE groups) by offsetting according to the service cycle.

[0239] According to some implementations of the present disclosure, in terms of energy saving, the BS can perform transmission to multiple UEs in a relatively short time period by aligning and configuring the starting points of the DRX cycles and / or on-durations of multiple UEs via DRX cycles and / or on-duration offsets. Aligning the starting points of the DRX cycles and / or on-durations of multiple UEs may mean completely overlapping or aligning the DRX cycles and / or on-durations of multiple UEs, or may mean partially overlapping or aligning the DRX cycles and / or on-durations of multiple UEs. Then, energy saving can be achieved by switching to sleep mode according to the inactivity time of the UE. In this case, it may be difficult to use a semi-static offset adjustment to quickly change the offset value of the business situation or energy saving through the existing RRC parameters drx-LongCycleStartOffset or drx-SlotOffset, so considering the delay and flexibility, the offset value and the offset value duration (for example, the number of DRX cycles to maintain the indicated offset value) can be dynamically indicated by a signal in the form of WUS or UE-specific DCI or GC-DCI.

[0240] In addition to the UE-specific DRX cycle configuration, the BS may configure the UE-common DRX cycle for the NES separately, and indicate the offset value and the offset value duration through the UE-specific DCI or GC-DCI, or indicate a 1-bit indicator and the offset value duration. In this case, while indicating the offset value, the offset value duration regarding the number of DRX cycles to which the corresponding offset value is to be applied or whether the corresponding offset value is to be applied during a specific time / duration may also be indicated.

[0241] By configuring one or more candidates of an offset value of the start point of the DRX cycle and / or the on-duration or a combination of an offset value and an offset value duration via a higher layer signal (e.g., RRC), and indicating one of the candidates by a signal in the form of a WUS before the start of the on-duration or by a UE-specific DCI or GC-DCI during the on-duration, or dynamically indicating one of the candidates based on the ID or C-RNTI of the UE, the start point and / or length of the DRX cycle and / or the on-duration can be aligned. In this case, the UE is informed of the number of UE groups (hereinafter, N) and N offsets to be applied to each group (or the index of each group) through the (GC-)DCI and / or (GC-)MAC CE, and determines a value obtained by calculating the modulo N of its own UE ID as the index of the group to which the UE belongs, and can also align the start point and / or length of the DRX cycle and / or the on-duration by applying the offset configured to the corresponding group index. Alternatively, when the UE has a paging group ID (a group of IDs of UEs monitoring the same PO), the UE may be indicated the offsets of each ID via (GC-)DCI or (GC-)MAC CE, and the starting point of the DRX cycle and / or on-duration may be determined by applying the offset configured for the paging group ID to which the UE belongs.

[0242] The semi-statically configured on-duration can be dynamically shifted forward / backward by the offset value and the offset value duration indicated by the WUS. In this case, the offset value and the offset value duration for how long the offset value is to be maintained can be pre-configured as one or more states of a combination of two values ​​by a high-level signal (e.g., RRC), and one of them can be dynamically indicated using the WUS. For example, a candidate for a combination of an offset value and a duration for which the offset value is to be maintained (the number of DRX cycles or a specific time / time interval to which the offset is to be applied) can be configured. In this case, the offset value can be configured as a unit of the DRX on-duration configured for the UE (e.g., 1 on-duration, 2 on-durations, ..., infinity), and the offset value duration can be configured as a unit of a time slot or a specific time (e.g., ms). The offset value duration can also be pre-configured as the number of DRX cycles to maintain the offset value, that is, the number of DRX cycles to be maintained (e.g., 2 DRX cycles, 3 DRX cycles, ..., infinity). One or more candidate states as a combination of these two values ​​can be pre-configured. In this case, infinity may mean maintaining the value indicated by the existing WUS unless another offset value and offset value duration are indicated by a separate WUS indication.

[0243] When the on / off of the on-duration is indicated by WUS, the interval between the WUS opportunity and the on-duration can be configured by considering the processing time required for the UE to turn on / off the upcoming on-duration according to the indication after receiving the WUS. Therefore, when the offset value and the offset value duration for adjusting the start time of the on-duration of the UE are dynamically indicated by WUS before the on-duration, the position of the WUS opportunity can also be dynamically changed according to the timeline between the WUS and the on-duration and the range of the on-duration to be shifted. That is, the on-duration configured semi-statically can be dynamically shifted forward / backward by the offset indicated by the WUS, so the position of the WUS opportunity can also be shifted according to the movement (shift) range of the on-duration moved by the offset based on the position of the on-duration configured initially. When the BS configures the candidate (e.g., the on-duration unit of DRX) of the offset value (on-duration) that can be indicated by WUS through high-level signaling (e.g., RRC), it is also expected to send the WUS at a position shifted by one value from the WUS opportunity, where the value is the value (also called the maximum shift value) that can shift the WUS opportunity the farthest among the configured offset value candidates. For example, when the offset value for shifting the on-duration forward by two on-duration lengths is the maximum shift value, it is also expected that the WUS is sent at a position shifted by two on-duration lengths from the WUS opportunity.

[0244] According to some implementations of the present disclosure, when the methods and / or processes described in the present disclosure are performed, a monitoring window may be configured to take into account the problem of missing DCI and / or MAC CE, during which the UE may attempt to detect the DCI and / or MAC CE, and when the detection fails, the previous offset may be maintained, or the original / default offset may be applied. The time point at which the offset value is applied may be indicated as an absolute time point (e.g., a frame, a subframe, a time slot index, or a combination thereof) or a relative time point (e.g., X ms after the time point at which the offset is indicated, or Y time slots after the time point at which the offset is indicated) via the DCI and / or MAC CE. When the duration of the dynamically indicated offset (or offset value) expires, the UE may automatically return to the original / default offset value, or continue to maintain the indicated offset value until a separate indication is received.

[0245] For convenience, the method and / or process according to the present disclosure is mainly described for C-DRX, but it can also be applied to I-DRX. For example, by making the on-duration for PDCCH monitoring in the C-DRX cycle the time period for performing paging monitoring in the I-DRX cycle, the method and / or process according to the present disclosure can be applied.

[0246] <Implementation 2> Method for configuring WUS timing for on / off on-duration for UE configured with C-DRX and method for configuring / indicating on / off for multiple on-durations through one WUS

[0247] Multiple WUS opportunities may be configured to overlap or be continuous through the offset and / or position of multiple on-durations, and on / off of the on-duration may be indicated by a specific field in the WUS.

[0248] The on / off of multiple on-durations (of a single UE or multiple different UEs) included in a specific duration or a specific number of DRX cycles can be configured / indicated by a single WUS. In this case, the specific duration or a specific number of DRX cycles can be indicated using a WUS, or can be pre-configured / indicated.

[0249] In detail, when there is no data to be sent / received to / from a UE configured with C-DRX in the upcoming on-duration, the BS may send a WUS in DCI format 2_6 in a WUS opportunity configured before the on-duration, indicating to the UE that it does not need to wake up during the corresponding on-duration. The UE receiving the corresponding WUS indication may continue to remain in a sleep state without switching to an active mode, thereby saving more energy. In some scenarios, the total size of the WUSDCI and the size of the starting bit index + Scell ​​sleep field may be configured to the UE via a UE-specific RRC. For example, when the starting bit index is n and the size of the Scell ​​sleep field is m, the nth to (n+m)th bits are considered information, and the rest are considered reserved.

[0250] As far as the BS is concerned, when the UE is maintained in an inactive mode via WUS, energy saving opportunities can be increased, but in order to inform all or a large number of UEs in the cell that the UE does not need to wake up during the on-duration, multiple WUSs need to be sent during each configured WUS opportunity. Therefore, when the WUS opportunities are distributed in time, the BS may have to repeat the operation of sleeping for a very short time and waking up again for each opportunity to send WUS. It is necessary to send multiple WUSs at the corresponding WUS opportunities configured for a specific UE to inform the UE that the UE does not need to wake up during multiple on-durations, so it may be beneficial in terms of energy saving of the BS to indicate the shutdown of multiple on-durations through a single WUS to ensure a long sleep time of the BS.

[0251] According to some implementations of the present disclosure, the BS can reduce the switching between active / inactive modes by configuring multiple WUS opportunities to be completely / partially overlapped or continuous via the offset of each UE. For example, when the first WUS opportunity, the second WUS opportunity, and the third WUS opportunity are configured in TDM format on the time axis (also referred to as the time domain) without overlap, the first WUS opportunity, the second WUS opportunity, and the third WUS opportunity can be configured to be completely overlapped or continuously configured without gaps, so that multiple WUS can be sent in one opportunity. By sending WUS to multiple UEs in a cell in one opportunity, it is not necessary to send WUS during the remaining duration, so the advantage is that the BS can ensure the longest possible sleep mode time without having to switch back to active mode. The on / off and / or offset values ​​of multiple on-durations can also be indicated in the WUS. For example, N on-durations can be configured in a DRX cycle, and the positions and / or on / off of the N on-durations can be indicated by the WUS of an N-bit bitmap. Here, the relationship between each bit in the bitmap including N bits and each on-duration located in the DRX cycle can be pre-arranged / configured / indicated. Therefore, each UE can know in advance which bit of the corresponding bitmap its on-duration corresponds to. For example, in a 2-bit bitmap, the first bit may be the first on-duration of the first UE that is earliest in time within the DRX cycle, and the second bit may be the on-duration that follows (or is immediately adjacent to) the first on-duration. The BS may indicate the position of the on-duration within the DRX cycle through a bitmap within the WUS, and when the bit is "1", the actual start position of the on-duration may be determined by determining at which "1" the bit is in the bitmap information. For example, when the bit position of the UE is the fourth bit in a 4-bit bitmap, in the case of 1111, the bit position may be the fourth on-duration position among four consecutive on-durations, and in the case of 0001, it may be interpreted as the on-duration of the UE being shifted to the first on-duration position.

[0252] By configuring / indicating the on / off of multiple on-durations (of a single UE or multiple different UEs) included in a specific duration via a single WUS, the energy saving effect of the BS can be increased. For example, one WUS per UE can indicate the on / off of one on-duration, but one WUS can indicate the on / off of multiple on-durations within a specific number of DRX cycles or multiple on-durations within a specific duration at a time. For the on-durations of multiple UEs, an on / off indication can also be given by a single WUS for the on-durations belonging to a specific duration or within a specific number of DRX cycles. In the current WUSDCI structure, when the starting bit index is n and the size of the SCell sleep field is m, it can be interpreted as adding an additional bit to m, or turning on / off a specific state among the states indicated by the nth to (n+m)th bits for multiple on-durations. Alternatively, an on / off bit can be added and specified.

[0253] For convenience, the method and / or process according to the present disclosure is mainly described for C-DRX, but it can also be applied to I-DRX by appropriate substitution. For example, the method and / or process according to the present disclosure can be applied by making the on-duration for PDCCH monitoring in the C-DRX cycle the duration for performing paging monitoring in the I-DRX cycle.

[0254] <Implementation 3> Method for configuring (multiple) DRX configurations for NES separately from UE-specific DRX configuration or introducing DRX groups for NES

[0255] Separate from the primary DRX group and / or secondary DRX group (if configured) configured for each serving cell (Scell) or for each DRX group, a single / multiple DRX group for NES may be configured. Hereinafter, the DRX group for NES is also referred to as a NESDRX group.

[0256] In this case, the DRX groups of multiple UEs may be dynamically switched through (GC-)DCI and / or (GC-)MAC CE.

[0257] In addition to the on-duration timer (e.g., drx-OnDurationTimer) and the inactivity timer (e.g., drx-InactivityTimer), the NES DRX group can also configure DRX parameters for common parameters separately for each group. Alternatively, additional parameters for NES can be configured from the DRX parameters within the primary DRX group and / or the secondary DRX group.

[0258] When a primary DRX group and a secondary DRX group are configured for a UE, the UE may perform DRX operation using the following method. When a primary DRX group and a secondary DRX group are configured and NES operation / mode is configured / indicated, the UE may perform DRX operation by applying the parameters configured in the primary DRX group to all cells belonging to the primary DRX group and the secondary DRX group.

[0259] When NES operation / mode is configured / indicated in a state where the primary DRX group and the secondary DRX group are configured and the DRX group for NES (also called UE group DRX for NES) is configured separately, the UE can perform DRX operation by applying the parameters configured in the DRX group for NES to all cells belonging to the primary DRX group and the secondary DRX group.

[0260] The UE may operate in active mode only during the corresponding on-duration that intersects with the on-duration of the configured DRX group or during the on-duration of a DRX group for NES (or NES parameters within a DRX group configured in a UE-specific manner) that is given priority over the UE-specific DRX group, and in sleep mode for the remaining duration.

[0261] However, the secondary DRX group may be optionally configured, and when the secondary DRX group is not configured and only one DRX group is configured, a NESDRX group may be additionally configured for the DRX group, or parameters for NES may be configured, and the method and / or process according to the present disclosure may be applied.

[0262] In detail, when the BS configures C-DRX to the UE through high-layer signaling (e.g., RRC), two DRX groups with separate DRX parameters may be configured. In this case, the DRX parameters configured separately for each DRX group may be drx-onDurationTimer and drx-InactivityTimer, and the common DRX parameters of the DRX group may include drx-SlotOffset, drx-RetransmissionTimerDL, drx-RetransmissionTimerUL, drx-LongCycleStartOffset, drx-ShortCycle (optional), drx-ShortCycleTimer (optional), drx-HARQ-RTT-TimerDL, drx-HARQ-RTT-TimerUL, and uplinkHARQ-Mode (optional). When no secondary DRX group is configured, all Scells may belong to only one DRX group (default DRX group), and when two DRX groups are configured, each Scell ​​may be uniquely assigned to one of the two groups. Therefore, the secondary DRX group may be optionally configured, and when the secondary DRX group is not configured and only one DRX group is configured, a NESDRX group may be additionally configured for the DRX group, or parameters for NES may be configured, and the method and / or process according to the present disclosure may be applied.

[0263] In addition to the above-mentioned C-DRX configuration and DRX parameter configuration, the BS may also configure a DRX configuration for NES for energy saving. In this case, the DRX configuration for NES may include a group common DRX parameter different from the parameters included in the existing UE-specific DRX configuration to save energy of the BS. The additional configuration of the DRX configuration for NES may mean changing the on-duration timer and / or inactivity timer of the UE to adjust the inactivity time of the UE within the cell to adapt to the energy saving purpose of the BS. The DRX configuration for NES may be one or more DRX configurations, and may mean introducing a DRX group for NES in addition to the existing primary DRX group and secondary DRX group.

[0264] In some scenarios, a primary DRX group and a secondary DRX group may be configured for a corresponding Scell, and according to some implementations of the present disclosure, a DRX group for NES may be additionally configured here, or a DRX group for NES may be configured for each DRX group. That is, a single / multiple DRX groups for NES may be separately configured in the primary DRX group, and a single / multiple DRX groups for NES may be separately configured in the secondary DRX group. When an additional DRX group for NES is configured, if the BS is in normal operation (i.e., in non-NES mode), the BS may operate as a primary DRX group and a secondary DRX group as before, but when the BS operates for energy saving (e.g., when the BS switches to sleep mode), the DRX groups of multiple UEs may be dynamically switched to one of the configured specific NES groups through (GC-)DCI and / or (GC-)MAC CE. The UE may switch to the NESDRX group to perform DRX operation according to the instructions, and switch to sleep mode except for the time the UE needs to remain active (e.g., drx-OnDurationTimer, drx-InactivityTimer, and drx-RetransmissionTimerDL / UL).

[0265] In addition to the parameters to be configured separately (e.g., the on-duration timer and the inactivity timer), the NESDRX group can also configure DRX parameters separately for the common parameters of each DRX group. For example, in order to save the energy of the BS, the BS can configure the common parameters drx-SlotOffset or drx-LongCycleStartOffset separately for each DRX group to a specific value. The parameters for NES among the DRX parameters within the primary DRX group and / or the secondary DRX group can be configured separately, and the UE can only be enabled to use the parameters for NES when the BS indicates that the NES mode is turned on. Even in this case, the UE can perform DRX operations using the DRX parameters for NES configured in the DRX group according to the on / off indication of the NES mode of the BS, and switch to sleep mode except for the time when the UE needs to remain active (e.g., drx-OnDurationTimer, drx-InactivityTimer, and drx-RetransmissionTimerDL / UL).

[0266] When the primary DRX group and the secondary DRX group are configured to the UE and the NES operation / mode is configured / indicated, the UE may perform the DRX operation by applying the parameters configured in the primary DRX group to all cells belonging to the primary DRX group and the secondary DRX group. When the BS configures / indicates the NES operation / mode, the UE may perform the DRX operation by applying the parameters configured in the secondary DRX group to all cells belonging to the primary DRX group and the secondary DRX group, or (equivalently) perform the DRX operation by applying the intersection duration between the on-duration of the primary DRX and the on-duration of the secondary DRX as the on-duration. When the NES operation / mode is configured / indicated in a state where the DRX group for NES is separately configured / indicated, the UE may perform the DRX operation by applying the parameters configured in the primary DRX group to all cells belonging to the primary DRX group and the secondary DRX group. For example, when the on-duration of the UE-specific DRX of the first UE, the second UE, and the third UE is configured as a first duration (hereinafter, t1), a second duration (hereinafter, t2), and a third duration (hereinafter, t3) (configured in TDM format) and the periodicity is T, the on-duration of the NESDRX group is configured to include all of t1, t2, and t3, but the periodicity is configured to be X times greater than T (rather than configuring it to occur quickly at T intervals), whereby the NESDRX group may be configured to include a plurality of UEs in TDM format with slightly longer on-durations and have a longer period. The UE may perform a DRX operation with priority using the DRX parameters configured in the specific DRX group according to the on / off indication of the NES mode of the BS, and switch to sleep mode except for the time when the UE needs to remain active (e.g., drx-OnDurationTimer, drx-InactivityTimer, and drx-RetransmissionTimerDL / UL).

[0267] The UE and / or BS may operate in active mode only during each duration in which the on-durations of the DRX groups configured for the corresponding Scell ​​intersect with each other, and may operate in sleep mode during the remaining duration. For example, when the primary DRX group and the secondary DRX group are configured, operation may be performed in active mode only during the intersection duration of the on-durations of the two DRX groups. As another example, when only the primary DRX group is configured, the corresponding DRX group may be a default DRX group, and even if the NESDRX group is additionally configured, only the duration in which the on-durations of the two DRX groups intersect with each other may operate in active mode. The on segment of the DRX group for NES (or the NES parameters in the DRX group configured in a UE-specific manner) may be given a higher priority than the DRX group configured in a UE-specific manner, and only the on-duration may be operated in active mode, while the remaining duration may be operated in sleep mode. For example, when UE-specific DRX and the DRX group for NES are configured, the DRX group may be configured / indicated to operate in active mode only during the overlapping on-durations (or active times) of the two DRX groups. When the on-durations (or active times) of two DRX groups do not overlap with each other, the active / sleep mode can be determined and operated by giving priority to the on-durations of the DRX group for NES. Even when the on-durations (or active times) of the two DRX groups overlap with each other, the on-duration of the DRX group for NES is given priority, and only the intersection duration is operated as the actual on-duration to maintain the active mode, while the other durations can be operated in the sleep mode to save energy. The UE can perform DRX operation using the DRX parameters configured for the DRX group for NES that has a higher priority than the UE-specific DRX group among the configured DRX groups, or can switch to the sleep mode only during the duration when the active times of the two DRX groups overlap with each other, except for the time when the UE needs to remain active. For convenience, the method and / or process according to the present disclosure is mainly described for C-DRX, but it can also be applied to I-DRX by appropriate replacement. For example, the method and / or process according to the present disclosure can be applied by making the on-duration for PDCCH monitoring in the C-DRX cycle the duration for performing paging monitoring in the I-DRX cycle.

[0268] <Implementation 4> A method for configuring a group common (GC) monitoring timing when the BS explicitly indicates the NES mode on indication, the offset indication for adjusting the start point of the DRX cycle and / or on interval, or the switching of the DRX group through WUS, (GC-)DCI, and / or (GC-)MAC CE, because the start point of the C-DRX cycle and / or on interval and the WUS timing may be different for each UE

[0269] The BS may configure one or more UE common monitoring occasions when configuring the C-DRX cycle for the NES switching indication. For example, the NES switching indication may be an on indication of the NES mode.

[0270] The BS may configure a periodic window so that the on-duration of a specific UE group or all UEs configured with C-DRX includes at least one time within a specific duration, and may send at least one switching indication within the window. In this case, switching means operating in the first DRX cycle / first DRX cycle group and then operating in the second DRX cycle / second DRX cycle group.

[0271] In detail, the BS can configure the start point and WUS timing of the C-DRX cycle and / or on-duration differently (i.e., at different times) for each UE in the cell, so the BS can clearly indicate, for example, the on indication of the NES mode of the BS, the offset indication for adjusting the start point of the DRX cycle and / or on-duration, or the switching of the DRX group to multiple UEs (or all UEs in the cell) at one time through WUS, (GC-)DCI or (GC-)MAC CE, and perform transmission according to the timing of each UE. In this case, when C-DRX is configured, the corresponding indication can be performed more efficiently by configuring the group common (GC) monitoring timing for all UEs or a specific group of UEs.

[0272] The BS may configure a periodic window so that the on-duration of a specific UE group or all UEs configured with C-DRX is included in a specific duration at least once, and a switching indication may be sent at least once within the window. The problem of UE missing a switching indication may occur. Taking this into account, the BS may send a switching indication more than once within the configured window. In this case, the UE configured with a periodically configured monitoring window monitors the on-indication of the NES mode, the offset indication for adjusting the starting point of the DRX cycle and / or the on-duration, or the DRX group switching indication during the corresponding window period, and when no indication is detected during the corresponding window duration, the UE may also apply the most recently received indication or perform DRX operation based on a pre-configured default configuration. For convenience, the method and / or process according to the present disclosure is mainly described for C-DRX, but it may also be applied to I-DRX. For example, the method and / or process according to the present disclosure may be applied by making the on-duration for PDCCH monitoring within the C-DRX cycle a time period for performing paging monitoring within the I-DRX cycle.

[0273] Hereinafter, a UE and / or BS operation method and / or process according to on / off duration of UE-specific DRX and / or cell-specific DRX is described in detail.

[0274] Fig.11A DL channel reception process in a UE according to some implementations of the present disclosure is shown.

[0275] The UE may receive a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration (S1101). A first predetermined operation may be performed during a first active time according to the cell-specific DRX configuration, and a second predetermined operation may be performed during a time outside the first active time according to the cell-specific DRX configuration (S1102).

[0276] Fig.12 A DL channel transmission process in a BS according to some implementations of the present disclosure is shown.

[0277] The BS may transmit a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration (S1201). A first predetermined operation may be performed during a first active time according to the cell-specific DRX configuration, and a second predetermined operation may be performed during a time other than the first active time according to the cell-specific DRX configuration (S1202).

[0278] <Implementation 5> Operation method of UE when jointly applying UE-specific DRX configuration (e.g., C-DRX / I-DRX configuration) and cell-specific DRX configuration (e.g., DRX / I-DRX configuration for NES mode operation)

[0279] The UE may receive a UE-specific DRX (e.g., C-DRX) configuration or a cell-specific DRX (e.g., DRX / I-DRX for NES mode operation) configuration from the BS. In the case of C-DRX or I-DRX, a UE not configured with DRX monitors the PDCCH in each time slot, while a UE configured with DRX monitors only during a preconfigured duration, and when a PDCCH is detected, the UE sends / receives according to the instructions of the BS. For example, a UE configured with C-DRX may perform PDCCH monitoring while an on-duration timer operates within a DRX cycle according to parameters in the configured DRX configuration, start an inactivity timer when a PDCCH is received, maintain an active time during the corresponding duration, and may not perform PDCCH monitoring when the timer expires until the upcoming on-duration, thereby saving energy. In this case, the UE may send / receive the corresponding channels and / or signals in the configured resources even during the duration outside the active time of the DL / UL channels and / or signals (e.g., PDCCH / PDSCH / CSI-RS / PRS / PUCCH / PUSCH / SRS) configured to be repeatedly sent / received. The active time is related to the UE's PDCCH monitoring and CSI reporting, and the UE may send / receive regardless of the active time of the DL / UL channels and / or signals (e.g., channels and / or signals configured to be repeatedly sent / received) configured as semi-static. For example, for a UE configured with I-DRX, instead of monitoring the paging DCI in each time slot, the UE can save energy by monitoring the paging DCI only at specific paging occasions (PO) that the UE needs to monitor during each DRX cycle, and not monitoring the DCI during the remaining time.

[0280] For NES, the BS may configure cell-specific DRX. In this case, the UE may not perform PDCCH monitoring even during the active time within the DRX cycle, and during the duration outside the active time, the reception of common channels and / or signals such as SSB / SIB1 may be omitted or may only receive common channels and / or signals in a very long period. The active time may mean the union of the durations for which the UE needs to perform PDCCH monitoring for each time slot within the DRX cycle (e.g., drx-OnDurationTimer, drx-InactivityTimer, and drx-RetransmissionTimerDL / UL), or may only mean the duration of the on-duration timer operation within the DRX cycle. Even if channels and / or signals such as PDCCH / PDSCH / CSI-RS / PRS / PUCCH / PUSCH / SRS are configured to be sent / received (repeatedly) during the duration outside the active time, the UE may not perform transmission / reception on the resources of these channels and / or signals. Cell-specific DRX may be defined for NES mode / state. When the NES mode / state is configured / indicated by the BS, the UE may be pre-configured to save energy by shutting down transmission / reception of some or all DL / UL signals during a specific duration, reducing the amount of frequency resources to be transmitted / received, reducing the number of antenna ports used for transmission, or reducing transmission power while the UE is operating in the NES mode. Alternatively, when the NES mode / state is configured / indicated, the UE may perform operations defined in the NES mode / state during an active time within a cell-specific DRX cycle or during a duration outside the active time.

[0281] In this case, UE-specific DRX (e.g., C-DRX / I-DRX) and cell-specific DRX (e.g., DRX / I-DRX for NES mode operation) may be jointly configured. In other words, the UE-specific DRX configuration and the cell-specific DRX configuration may be jointly applied. For example, the active time and / or inactive duration of the UE-specific DRX may overlap with the active time and / or inactive duration of the cell-specific DRX. For example, DRX for C-DRX and NES mode operations may be jointly applied. In this case, the UE may perform DRX operations by the following methods and / or processes. During the active time of the cell-specific DRX, operations defined in the cell-specific DRX or NES mode / state may be performed, and during the duration outside the active time, operations may be performed according to the UE-specific DRX configuration. Conversely, during the active time of the cell-specific DRX, operations may be performed according to the UE-specific DRX configuration, and during the duration outside the active time, operations defined in the cell-specific DRX or NES mode / state may be performed.

[0282] Fig.13 The DRX operation in the UE according to some implementations of the present disclosure is shown. In detail, Fig.13 The operation of the UE in various durations when UE-specific DRX and cell-specific DRX are jointly configured is shown.

[0283] The UE may perform operations defined for the cell-specific DRX during the active time according to the cell-specific DRX configuration, and may perform operations according to the UE-specific DRX configuration during times other than the active time according to the cell-specific DRX configuration. Fig.13 , operations defined for cell-specific DRX may be performed during the on-duration (duration (a)) of the cell-specific DRX. That is, during duration (a), operations defined for cell-specific DRX may be performed regardless of UE-specific DRX. During the off-duration (duration (b)) of the cell-specific DRX, operations may be performed according to the UE-specific DRX configuration. For example, during duration (b), when the UE-specific DRX is in the on-duration, PDCCH monitoring may be performed during the duration, and when the UE-specific DRX is off during duration (b), PDCCH monitoring may not be performed.

[0284] The UE may perform operations according to the UE-specific DRX configuration during the active time according to the cell-specific DRX configuration, and perform operations defined in the cell-specific DRX configuration during times other than the active time according to the cell-specific DRX configuration. Fig.13 , operations according to UE-specific DRX may be performed during the on-duration (duration (a)) of cell-specific DRX. For example, during duration (a), when UE-specific DRX is in the on-duration, PDCCH monitoring may be performed during the duration, and when UE-specific DRX is off during duration (a), PDCCH monitoring may not be performed. During the off-duration (duration (b)) of cell-specific DRX, operations defined for cell-specific DRX may be performed. That is, during duration (b), operations defined for cell-specific DRX may be performed regardless of UE-specific DRX.

[0285] In this case, for a specific DRX for cell-specific DRX or NES mode operation, unlike UE-specific DRX, there may only be an on-duration without an extension of the active time according to PDCCH reception. That is, the inactivity timer may not exist or may not operate. Alternatively, a (non-zero) inactivity timer may also be configured for DRX for cell-specific DRX or NES mode operation, in which case the active time may be extended only based on the reception of (any or) a specific GC-DCI (DCI format).

[0286] According to the method and / or process of the present disclosure, when UE-specific DRX and DRX / I-DRX for cell-specific DRX or NES mode operation are jointly configured, by performing operation according to the DRX / I-DRX configuration for cell-specific DRX or NES mode operation, energy saving effect can be increased. For example, when UE-specific DRX and cell-specific DTX / DRX or NES mode are jointly configured, and the UE is configured / instructed to give priority to cell-specific DTX / DRX or NES mode operation over UE-specific DRX operation, even if PDCCH monitoring is required for a duration in UE-specific DRX operation, if the duration is a duration in which PDCCH is not sent according to the cell-specific DTX configuration, the UE may not perform PDCCH monitoring, thereby saving energy of both the UE and the BS.

[0287] <Implementation 6> If a specific pattern (one of a plurality of pre-configured time domain on / off patterns or on / off durations of a specific DL / UL signal and / or channel) is additionally configured / indicated via (GC-)DCI and / or (GC-)MAC CE, a method for performing transmission / reception according to a correlation between the on duration and the on / off pattern configured for DRX when DRX (C-DRX or I-DRX) or cell-specific DTX / DRX is configured for the UE

[0288] When C-DRX is configured for a connected mode UE, the active time is maintained only during the on-duration within the DRX cycle according to the parameters in the DRX configuration, and PDCCH monitoring is performed for each time slot, and the active time may be maintained while the timer for PDCCH reception or retransmission is operating. In this case, the active time may mean the union of the durations for which the UE needs to perform PDCCH monitoring for each time slot within the DRX cycle (e.g., drx-OnDurationTimer, drx-InactivityTimer, and drx-RetransmissionTimerDL / UL), or may mean only the duration of the on-duration timer operation within the DRX cycle. The UE may turn off PDCCH monitoring during the duration outside the active time, and may use the configured resources to send / receive DL / UL channels and / or signals (e.g., PDCCH / PDSCH / CSI-RS / PRS / PUCCH / PUSCH / SRS) that were previously configured to be (repeatedly) sent / received even during the duration outside the active time. The active time is related to the PDCCH monitoring and CSI reporting of the UE, and the UE can send / receive regardless of the active time of the DL / UL channels and / or signals configured as semi-static (e.g., channels and / or signals configured to be repeatedly sent / received). When the UE in idle mode operates according to the I-DRX configuration, this can save energy by performing PDCCH monitoring in each time slot to check whether there is paging information / signal sent to the UE only from its own PO within the DRX cycle, and not performing PDCCH monitoring at other times.

[0289] For NES, the BS may also configure cell-specific DTX / DRX. In this case, similar to C-DRX, the cell-specific DTX / DRX for NES purposes may be configured as semi-static on and off durations, but the UE and / or BS may only send / receive agreed / pre-configured DL / UL channels and / or signals during the on duration or active time within the cell-specific DTX / DRX cycle, and PDCCH monitoring may not be performed according to pre-arrangement / pre-configuration. During the duration outside the active time, the reception of common channels and / or signals such as SSB / SIB1 may be omitted or received only in very long cycles. If the cell-specific DTX / DRX durations overlap with each other, even if channels and / or signals such as PDCCH / PDSCH / CSI-RS / PRS / PUCCH / PUSCH / SRS are configured to be (repeatedly) sent / received during a time period outside the active time, sending / receiving may not be performed on the resources of these channels and / or signals during the time period. In other words, when channels and / or signals such as PDCCH / PDSCH / CSI-RS / PRS / PUCCH / PUSCH / SRS are configured to (repeatedly) transmit / receive according to a preset DRX configuration (e.g., C-DRX / I-DRX) when the duration of transmission / reception overlaps with the duration outside the active time of the cell-specific DTX / DRX, the UE and / or BS may not perform transmission / reception on the resources of the corresponding channels and / or signals.

[0290] When DRX (C-DRX or I-DRX) and / or cell-specific DTX / DRX are configured, thereby configuring a semi-static DRX cycle, a specific pattern among a plurality of pre-configured time domain on / off patterns (or a shutdown duration of a specific DL / UL channel and / or signal) may be additionally configured / indicated via (GC-)DCI and / or (GC-)MAC CE. In this case, as a method for the BS to indicate via (GC-)DCI and / or (GC-)MAC CE to shut down the transmission / reception of DL / UL channels and / or signals for a specific duration, there are multiple methods of pre-configuring a plurality of shutdown durations and indicating one of the shutdown durations, or pre-configuring a timer value and shutting down the timer time when shutting down is indicated and then turning on when the timer expires. In this case, an infinite value or an inapplicable value may be configured as a candidate for the pre-configured shutdown duration, and if an infinite / non-numeric / inapplicable value is configured / indicated via (GC-)DCI and / or (GC-)MAC CE, the shutdown may be maintained until a separate turn-on is indicated. As a method of preconfiguring multiple on / off patterns and indicating a specific pattern via (GC-)DCI and / or (GC-)MAC CE, there is a method of configuring information about the duration (or timer) of the pattern in addition to the on / off pattern configuration information or configuring / indicating the information separately, and / or a method of switching to the on duration or switching to a preconfigured upcoming pattern and / or duration when the duration (or timer) of the pattern ends.

[0291] In the case where the DRX cycle is semi-statically operated by the DRX configuration (C-DRX / I-DRX / cell-specific DTX / DRX), when a dynamic on / off pattern (or off-duration) is indicated, if the active time of the DRX cycle overlaps with the dynamically indicated off-duration, a possible UE operation method is as follows. Transmission / reception may be performed by considering the intersection duration of the semi-static active time and the on-duration of the dynamically indicated on / off pattern (i.e., the intersection of the two durations) or the union duration of the semi-static active time and the dynamically indicated on-duration (i.e., the union of the two durations) as the on-duration.

[0292] In the former case, the UE may transmit / receive only the pre-configured / arranged DL / UL channels and / or signals during the overlapping / crossing duration of the semi-static activity time and the on-duration of the dynamically indicated on / off pattern, and may turn off the transmission / reception of the pre-configured DL / UL channels and / or signals during the non-overlapping / non-crossing duration by treating the duration as the off-duration. For example, when the PDCCH is configured to be an on-duration in the DRX configuration, but the channel and / or signal to be turned off during the duration of the off-duration in the dynamically indicated pattern, PDCCH monitoring may be turned off.

[0293] In the case where the off duration according to the dynamically indicated pattern overlaps / intersects with the semi-static active time (according to the DRX configuration), the dynamically indicated on / off pattern may be given priority, and the transmission / reception of the pre-arranged / pre-configured DL / UL channels and / or signals may be turned off even during the active time. In this case, as an exception, channels and / or signals (e.g., SSB / SIB1, PDCCH) that are allowed to be sent / received (by predefined rules or by pre-BS configuration) may still be sent / received even during the off duration. Alternatively, when the priority of the semi-static active time (according to the DRX configuration) is configured to be higher than the off duration according to the pre-dynamically indicated pattern, the transmission / reception of the channels and / or signals (e.g., PDCCH) to be turned off may also be allowed during the active time. The UE may postpone, extend or restart timers related to DRX operation (e.g., drx-OnDurationTimer, drx-InactivityTimer, and drx-RetransmissionTimerDL / UL) during the duration when the off-duration of the dynamically indicated on / off pattern overlaps / intersects with the active time of the semi-static DRX cycle or after the off-duration. In this case, for example, postponing the timer may mean that if the active time is expected to overlap with the off-duration, the timer is not started, but the start of the timer is postponed until the end of the off-duration, and the timer is started immediately at the end of the off-duration, or after the end of the off-duration after a preconfigured / pre-indicated offset value. The UE may skip / postpone transmission and / or reception on resources of channels and / or signals (e.g., PDCCH / PDSCH / CSI-RS / PRS / PUCCH / PUSCH / SRS) configured for repeated transmission / reception during the duration when the active time of the semi-static DRX cycle overlaps / intersects with the off-duration of the dynamically indicated on / off pattern. That is, if resources of channels and / or signals such as PDCCH / PDSCH / CSI-RS / PRS / PUCCH / PUSCH / SRS are included in the off duration or at least partially overlap, transmission and reception may be skipped for the corresponding resources, or transmission and / or reception may be performed after the off duration ends. In the case of repeated continuous PDSCH transmission and / or reception, PDSCH may be skipped / postponed or completely discarded for the duration overlapping with the off duration.

[0294] In the latter case, the UE may perform PDCCH monitoring in the semi-static activity time and transmit / receive in the dynamically indicated on-duration as in the existing DRX operation.

[0295] In the present disclosure, a DRX configuration for NES purposes or a specific DRX configuration for NES purposes (or a cell-specific DRX configuration) may mean a cell-specific DTX / DRX pattern or an active / inactive pattern that is periodically repeated during a duration agreed upon and / or preconfigured (e.g., defined in a standard document) for BS energy saving, and a duration of normal operation of the BS, during which the BS minimally or not (OFF) transmits / receives. In detail, as an example of a DRX configuration for NES, the UE may not perform PDCCH monitoring even during an active time within a DRX cycle, and may omit receiving common channels and / or signals such as SSB / SIB1 during a duration outside the active time or may receive common channels and / or signals only in a very long cycle. Even if the channels and / or signals are configured to be repeatedly transmitted / received outside the active time, the UE and / or BS may not perform transmission / reception on resources of channels and / or signals such as PDCCH / PDSCH / CSI-RS / PRS / PUCCH / PUSCH / SRS. When cell-specific DTX / DRX is configured or applied, an NES mode / state may be defined, and when the NES mode / state is configured and / or indicated, the UE and / or BS may be pre-configured to shut down the transmission and / or reception of some or all DL / UL channels and / or signals during a specific duration while operating in the NES mode, reduce the amount of frequency resources used for transmission and / or reception, reduce the number of antenna ports used for transmission, or reduce the transmission power to save energy. The BWP for NES may refer to a specific BWP switched when the NES mode is turned on, which may refer to a BWP that includes only a very small number of RBs (i.e., BW, amount of frequency resources) among the BWPs configured for the UE. If the BS operates in a non-NES mode, i.e., the UE in the cell is instructed and / or configured to turn off the NES mode, the BS may send / receive DL / UL channels and / or signals in the same manner as in general BS operation. The DRX configuration of NES may be the same as the C-DRX / I-DRX of an existing UE, or may mean dynamically indicating the time domain on / off pattern of the agreed (multiple) DL / UL channels and / or signals via L1 (e.g., GC-DCI) / L2 (e.g., GC-MAC CE) signaling, etc.

[0296] The UE may perform operations according to some implementations of the present disclosure in conjunction with receiving a DL channel. The UE may include: at least one transceiver; at least one processor; and at least one computer memory, which is operatively connected to the at least one processor and stores instructions, which when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A processing device for a UE may include: at least one processor; and at least one computer memory, which is operatively connected to the at least one processor and stores instructions, which when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer-readable (non-transitory) storage medium may store at least one computer program including instructions, which when executed by at least one processor cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer program or computer program product may be recorded on at least one computer-readable (non-transitory) storage medium and may contain instructions, which when executed cause (at least one processor) to perform operations according to some implementations of the present specification.

[0297] In a UE, a processing device, a computer-readable (non-volatile) storage medium and / or a computer program product, the operations may include: receiving a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first active time according to the cell-specific DRX configuration; and performing a second predetermined operation during a time outside the first active time according to the cell-specific DRX configuration.

[0298] In some implementations of the present disclosure, the first predetermined operation may include an operation defined for a cell-specific DRX, and the second predetermined operation may include an operation configured according to a UE-specific DRX.

[0299] In some implementations of the present disclosure, the first predetermined operation may include an operation according to a UE-specific DRX configuration, and the second predetermined operation may include an operation defined for a cell-specific DRX.

[0300] In some implementations of the present disclosure, operations according to the UE-specific DRX configuration may include: performing DL channel monitoring during the second active time according to the UE-specific DRX configuration; omitting DL channel monitoring during a time outside the second active time; or continuing to repeat a signal configured to be repeated outside the second active time.

[0301] In some implementations of the present disclosure, operations defined for cell-specific DRX may include: sending and receiving only predetermined signals during a first active time; receiving common signals with a long cycle during a time outside the first active time; or omitting repetition of a signal configured to be repeated outside the first active time.

[0302] In some implementations of the present disclosure, operations defined for cell-specific DRX may include: sending and receiving only predetermined signals during a first active time; omitting reception of common signals during times outside the first active time; or omitting repetition of signals configured to be repeated outside the first active time.

[0303] In some implementations of the present disclosure, operations defined for cell-specific DRX may include: receiving a network energy saving (NES) mode configuration; and performing NES mode operations during the NES mode operation duration, and in this case, the NES mode operations may include any one of omitting the transmission and reception of a predetermined signal, reducing the frequency band of the predetermined signal, reducing the number of antenna ports used for the predetermined signal, or reducing the transmission power of the predetermined signal.

[0304] In some implementations of the present disclosure, the operation may also include: starting to drive an on-duration timer configured according to a cell-specific DRX to start a first active time; receiving a physical downlink control channel (PDCCH) during the first active time; and terminating the first active time based on the expiration of the on-duration timer configured according to the cell-specific DRX.

[0305] In some implementations of the present disclosure, the operation may also include: starting to drive an on-duration timer configured according to a cell-specific DRX to start a first activity time; receiving a physical downlink control channel (PDCCH) during the first activity time; and extending the first activity time by driving an inactivity timer configured according to a cell-specific DRX based on a PDCCH including group common downlink control information (GC-DCI).

[0306] The BS may be associated with PDL signaling to perform operations according to some implementations of the present disclosure. The BS may include: at least one transceiver; at least one processor; and at least one computer memory, which is operatively connectable to the at least one processor and stores instructions, which when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A processing device for a BS may include: at least one processor; and at least one computer memory, which is operatively connectable to the at least one processor and stores instructions, which when executed, cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer-readable (non-transitory) storage medium may store at least one computer program including instructions, which when executed by at least one processor cause the at least one processor to perform operations according to some implementations of the present disclosure. A computer program or computer program product may include instructions, which are recorded on at least one computer-readable (non-transitory) storage medium and when executed, cause (at least one processor) to perform operations according to some implementations of the present disclosure.

[0307] In a BS, a processing device, a computer-readable (non-volatile) storage medium and / or a computer program product, the operations may include: sending a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first active time according to the cell-specific DRX configuration; and performing a second predetermined operation during a time outside the first active time according to the cell-specific DRX configuration.

[0308] In some implementations of the present disclosure, the first predetermined operation may include an operation defined for a cell-specific DRX, and the second predetermined operation may include an operation configured according to a UE-specific DRX.

[0309] In some implementations of the present disclosure, the first predetermined operation may include an operation according to a UE-specific DRX configuration, and the second predetermined operation may include an operation defined for a cell-specific DRX.

[0310] In some implementations of the present disclosure, operations according to the UE-specific DRX configuration may include: performing DL channel transmission during the second active time according to the UE-specific DRX configuration; omitting DL channel transmission during a time outside the second active time; or continuing to repeat a signal configured to be repeated outside the second active time.

[0311] In some implementations of the present disclosure, operations defined for cell-specific DRX may include: receiving and sending only predetermined signals during a first active time; sending common signals with a long cycle during a time outside the first active time; or omitting repetition of a signal configured to be repeated outside the first active time.

[0312] In some implementations of the present disclosure, operations defined for cell-specific DRX may include: receiving and sending only predetermined signals during a first active time; omitting transmission of common signals during times outside the first active time; or omitting repetition of signals configured to be repeated outside the first active time.

[0313] In some implementations of the present disclosure, operations defined for cell-specific DRX may include: sending a network energy saving (NES) mode configuration; and performing NES mode operation during the NES mode operation duration, and in this case, the NES mode operation may include any one of omitting reception and transmission of a predetermined signal, reducing a frequency band of the predetermined signal, reducing the number of antenna ports used for the predetermined signal, or reducing the transmission power of the predetermined signal.

[0314] In some implementations of the present disclosure, the operation may also include: starting to drive an on-duration timer configured according to a cell-specific DRX to start a first active time; sending a physical downlink control channel (PDCCH) during the first active time; and terminating the first active time based on the expiration of the on-duration timer configured according to the cell-specific DRX.

[0315] In some implementations of the present disclosure, the operation may also include: starting to drive an on-duration timer configured according to a cell-specific DRX to start a first active time; sending a physical downlink control channel (PDCCH) during the first active time; and extending the first active time by driving an inactivity timer configured according to a cell-specific DRX based on a PDCCH including group common downlink control information (GC-DCI).

[0316] The examples of the present disclosure as described above have been presented to enable those of ordinary skill in the art to implement and practice the present disclosure. Although the present disclosure is described with reference to the examples, those skilled in the art may make various modifications and changes in the examples of the present disclosure. Therefore, the present disclosure is not intended to be limited to the examples set forth herein, but to conform to the widest scope consistent with the principles and features disclosed herein.

[0317] Industrial Applicability

[0318] Implementations of the present disclosure may be used in a BS, a UE, or other devices in a wireless communication system.

Claims

1. A method for receiving a downlink DL channel by a user equipment UE in a wireless communication system, the method comprising the following steps: Receive synchronization signal block SSB; Sending a random access channel RACH preamble based on the SSB; receiving a random access response based on the RACH preamble; Based on receiving the random access response, receiving a user equipment UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first activity time according to the cell-specific DRX configuration; as well as A second predetermined operation is performed during a time outside the first active time according to the cell-specific DRX configuration.

2. The method according to claim 1, wherein: The first predetermined operation includes an operation defined for cell-specific DRX, and The second predetermined operation includes an operation according to the UE-specific DRX configuration.

3. The method according to claim 1, wherein: The first predetermined operation comprises an operation according to the UE-specific DRX configuration, and The second predetermined operation includes an operation defined for cell-specific DRX.

4. The method according to claim 2 or 3, wherein: The operation according to the UE-specific DRX configuration includes: performing DL channel monitoring during a second activity time according to the UE-specific DRX configuration; omitting the DL channel monitoring during times other than the second activity time; or The repetition of the signal configured to be repeated continues outside of the second activity time.

5. The method according to claim 2 or 3, wherein: The operation defined for the cell-specific DRX includes: sending and receiving only predetermined signals during said first activity time; receiving a common signal at a long period during a time other than the first active time; or Repetition of a signal configured to be repeated is omitted outside of the first active time.

6. The method according to claim 2 or 3, wherein: The operation defined for the cell-specific DRX includes: sending and receiving only predetermined signals during said first activity time; omit receiving a common signal in a long cycle during a time other than the first active time; or Repetition of a signal configured to be repeated is omitted outside of the first active time.

7. The method according to claim 2 or 3, wherein: The operation defined for the cell-specific DRX includes: Receiving a network energy saving NES mode configuration; and performing NES mode operations during the NES mode operation duration, and The NES mode operation includes any one of omitting transmission and reception of a predetermined signal, reducing a frequency band of the predetermined signal, reducing the number of antenna ports used for the predetermined signal, or reducing transmission power of the predetermined signal.

8. The method according to claim 1, further comprising the steps of: Start driving an on-duration timer according to the cell-specific DRX configuration to start the first activity time; receiving a physical downlink control channel (PDCCH) during the first activity time; as well as Based on expiration of the on-duration timer according to the cell-specific DRX configuration, the first activity time is terminated.

9. The method according to claim 1, further comprising the steps of: Starting to drive an on-duration timer according to the cell-specific DRX configuration to start the first activity time; receiving a physical downlink control channel (PDCCH) during the first activity time; and The first activity time is extended by driving an inactivity timer according to the cell-specific DRX configuration based on the PDCCH including group common downlink control information GC-DCI.

10. A user equipment UE for receiving a downlink UL signal in a wireless communication system, the UE comprising: at least one transceiver; at least one processor; as well as at least one computer memory operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: Receive synchronization signal block SSB; Sending a random access channel RACH preamble based on the SSB; receiving a random access response based on the RACH preamble; Based on receiving the random access response, receiving a user equipment UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first activity time according to the cell-specific DRX configuration; and A second predetermined operation is performed during a time outside the first active time according to the cell-specific DRX configuration.

11. A processing device in a wireless communication system, the processing device comprising: at least one transceiver; at least one processor; as well as at least one computer memory operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: Receive synchronization signal block SSB; Sending a random access channel RACH preamble based on the SSB; receiving a random access response based on the RACH preamble; Based on receiving the random access response, receiving a user equipment UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first activity time according to the cell-specific DRX configuration; and A second predetermined operation is performed during a time outside the first active time according to the cell-specific DRX configuration.

12. A non-transitory computer-readable storage medium storing at least one computer program comprising instructions, which when executed by at least one processor causes the at least one processor to perform operations for a user equipment (UE), the operations comprising: Receive synchronization signal block SSB; Sending a random access channel RACH preamble based on the SSB; receiving a random access response based on the RACH preamble; Based on receiving the random access response, receiving a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first activity time according to the cell-specific DRX configuration; as well as A second predetermined operation is performed during a time outside the first active time according to the cell-specific DRX configuration.

13. A computer program stored in a computer-readable storage medium, the computer program comprising at least one program code, the at least one program code comprising instructions, the instructions when executed causing at least one processor to perform operations comprising: Receive synchronization signal block SSB; Sending a random access channel RACH preamble based on the SSB; receiving a random access response based on the RACH preamble; Based on receiving the random access response, receiving a UE-specific discontinuous reception (DRX) configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first activity time according to the cell-specific DRX configuration; as well as A second predetermined operation is performed during a time outside the first active time according to the cell-specific DRX configuration.

14. A method for sending a downlink DL channel by a base station BS to a user equipment UE in a wireless communication system, the method comprising the following steps: Send synchronization signal block SSB; Receiving a random access channel RACH preamble based on the SSB; Sending a random access response based on the RACH preamble; Based on receiving the random access response, sending a UE-specific discontinuous reception DRX configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first activity time according to the cell-specific DRX configuration; as well as A second predetermined operation is performed during a time outside the first active time according to the cell-specific DRX configuration.

15. A base station BS for sending a downlink DL signal to a user equipment UE in a wireless communication system, the BS comprising: at least one transceiver; at least one processor; as well as at least one computer memory operatively connected to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising: Send synchronization signal block SSB; Receiving a random access channel RACH preamble based on the SSB; Sending a random access response based on the RACH preamble; Based on receiving the random access response, sending a UE-specific discontinuous reception DRX configuration and a cell-specific DRX configuration; performing a first predetermined operation during a first activity time according to the cell-specific DRX configuration; and A second predetermined operation is performed during a time outside the first active time according to the cell-specific DRX configuration.

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