Method and apparatus for resource allocation in time domain in wireless communication system

Abstract

The present disclosure relates to a 5G or 6G communication system for supporting higher data transmission rates than 4G communication systems such as LTE. A method performed by a terminal for resource allocation in a time domain in a wireless communication system according to an embodiment of the present disclosure comprises: receiving from a base station configuration information for a time domain resource allocation table applicable to a PDSCH, configuration information indicating a minimum scheduling offset for scheduling a PDSCH to receive a paging message for the terminal, and configuration information for a specific set of control resources for monitoring a PDCCH for paging; monitoring the PDCCH for paging based on the specific set of control resources; receiving a DCI from the PDCCH for paging from the base station, wherein the DCI includes information indicating whether the time domain resource allocation information for the PDSCH and the minimum scheduling offset are set, and includes a CRC scrambled by the P-RNTI for paging; and when the minimum scheduling offset for paging is set, verifying a first slot offset for scheduling the PDSCH based on the minimum scheduling offset, the time domain resource allocation table, and the time domain resource allocation information, and the first slot offset Based on this, the process includes receiving a paging message from the PDSCH for the paging, and the terminal operates in a power-saving mode between the time when the DCI is received from the PDCCH and the time when reception occurs in the PDSCH.

Description

Technology Field

[0001] The present disclosure relates to an apparatus and method for scheduling in a wireless communication system. Background Technology

[0002] 4G(4 th To meet the increasing demand for wireless data traffic following the commercialization of the (generation) communication system, improved 5G (5 th Efforts are being made to develop 5G communication systems or pre-5G communication systems. For this reason, 5G communication systems or pre-5G communication systems are referred to as Beyond 4G Network communication systems or Post-LTE systems.

[0003] To achieve high data transmission rates, 5G communication systems are being considered for implementation in the mmWave band (e.g., the 60 GHz band). To mitigate path loss and increase the transmission distance of radio waves in the mmWave band, beamforming, massive MIMO, full Dimensional MIMO (FD-MIMO), array antenna, analog beamforming, and large-scale antenna technologies are being discussed for 5G communication systems.

[0004] In addition, to improve the network of the system, technologies such as advanced small cell, advanced small cell, cloud radio access network (cloud RAN), ultra-dense network, Device to Device communication (D2D), wireless backhaul, moving network, cooperative communication, Coordinated Multi-Points (CoMP), and interference cancellation are being developed in 5G communication systems.

[0005] In addition, advanced coding modulation (ACM) methods such as FQAM (Hybrid Frequency Shift Keying and Quadrature Amplitude Modulation) and SWSC (Sliding Window Superposition Coding), as well as advanced access technologies such as FBMC (Filter Bank Multi Carrier), NOMA (Non Orthogonal Multiple Access), and SCMA (Sparse Code Multiple Access) are being developed in 5G systems.

[0006] Looking back at the evolution of wireless communication through successive generations, technologies have been developed primarily for human-oriented services, such as voice, multimedia, and data. Following the commercialization of 5G (5th-generation) communication systems, connected devices, which have been increasing explosively, are expected to be connected to communication networks. Examples of networked objects include vehicles, robots, drones, home appliances, displays, smart sensors installed in various infrastructures, construction machinery, and factory equipment. Mobile devices are expected to evolve into various form factors, such as augmented reality glasses, virtual reality headsets, and holographic devices. In the 6G (6th-generation) era, efforts are underway to develop improved 6G communication systems to connect hundreds of billions of devices and objects to provide diverse services. For this reason, 6G communication systems are being referred to as "beyond 5G" systems.

[0007] In the 6G communication system predicted to be realized around 2030, the maximum transmission speed is tera (i.e., 1,000 gigabit) bps, and the wireless latency is 100 microseconds (μsec). In other words, compared to the 5G communication system, the transmission speed in the 6G communication system is 50 times faster, and the wireless latency is reduced to one-tenth.

[0008] To achieve such high data transmission speeds and ultra-low latency, 6G communication systems are being considered for implementation in the terahertz band (e.g., the 95 GHz to 3 terahertz (3 THz) band). In the terahertz band, due to more severe path loss and atmospheric absorption compared to the millimeter wave (mmWave) band introduced in 5G, the importance of technology capable of guaranteeing signal reach, or coverage, is expected to increase. As key technologies to ensure coverage, radio frequency (RF) devices, antennas, new waveforms that offer better coverage than orthogonal frequency division multiplexing (OFDM), beamforming, and multi-antenna transmission technologies such as massive multiple-input and multiple-output (massive MIMO), full-dimensional MIMO (FD-MIMO), array antennas, and large-scale antennas must be developed. In addition, new technologies such as metamaterial-based lenses and antennas, high-dimensional spatial multiplexing technology using orbital angular momentum (OAM), and reconfigurable intelligent surface (RIS) are being discussed to improve coverage of terahertz band signals.

[0009] In addition, to improve frequency efficiency and system network, development is underway in 6G communication systems for full duplex technology, in which uplink and downlink simultaneously utilize the same frequency resources at the same time; network technology that integrates satellites and HAPS (high-altitude platform stations); network structure innovation technology that supports mobile base stations and enables network operation optimization and automation; dynamic spectrum sharing technology through collision avoidance based on spectrum usage prediction; AI-based communication technology that utilizes AI (artificial intelligence) from the design stage and internalizes end-to-end AI support functions to realize system optimization; and next-generation distributed computing technology that realizes services of complexity exceeding the limits of terminal computing capabilities by utilizing ultra-high performance communication and computing resources (mobile edge computing (MEC), cloud, etc.). In addition, attempts are continuing to further strengthen connectivity between devices, further optimize networks, promote the softwareization of network entities, and increase the openness of wireless communication through the design of new protocols to be used in 6G communication systems, the implementation of hardware-based security environments, the development of mechanisms for the safe utilization of data, and the development of technologies regarding privacy maintenance methods.

[0010] Due to the research and development of such 6G communication systems, it is expected that a new dimension of hyper-connected experience will become possible through the hyper-connectivity of 6G communication systems, which encompasses not only connections between objects but also connections between people and objects. Specifically, it is projected that 6G communication systems will enable the provision of services such as truly immersive extended reality (truly immersive XR), high-fidelity mobile holograms, and digital replicas. Furthermore, services such as remote surgery, industrial automation, and emergency response, which are provided through 6G communication systems with enhanced security and reliability, will be applied in various fields including industry, healthcare, automotive, and home appliances. The problem to be solved

[0012] The present disclosure provides an apparatus and method for efficiently performing resource allocation in the time domain in a wireless communication system.

[0013] In addition, the present disclosure provides an apparatus and method for efficiently performing cross-slot scheduling related to paging in a wireless communication system. means of solving the problem

[0014] A method performed by a terminal for resource allocation in a time domain in a wireless communication system according to an embodiment of the present disclosure comprises: receiving from a base station configuration information for a time domain resource allocation table applicable to a physical downlink shared channel (PDSCH), configuration information indicating a minimum scheduling offset for scheduling a PDSCH to receive a paging message for the terminal, and configuration information for a specific set of control resources for monitoring a physical downlink control channel (PDCCH) for paging; monitoring the PDCCH for paging based on the specific set of control resources; receiving downlink control information (DCI) from the PDCCH for paging from the base station, wherein the DCI includes information indicating whether the time domain resource allocation information for the PDSCH and the minimum scheduling offset are set, and includes a cyclic redundancy check (CRC) scrambled by a paging-radio network temporary identifier (P-RNTI) for paging, and wherein the minimum scheduling offset is set for paging In the case, the method includes a process of determining a first slot offset for scheduling the PDSCH based on the minimum scheduling offset, the time domain resource allocation table, and the time domain resource allocation information, and a process of receiving a paging message from the PDSCH for paging based on the first slot offset, and the terminal operates in a power-saving mode between the time when the DCI is received from the PDCCH and the time when reception occurs in the PDSCH.In a wireless communication system according to an embodiment of the present disclosure, a terminal comprises a transceiver and, through the transceiver, receives from a base station configuration information for a time domain resource allocation table applicable to a PDSCH, configuration information indicating a minimum scheduling offset for scheduling a PDSCH to receive a paging message for the terminal, and configuration information for a specific set of control resources for monitoring a PDCCH for paging; through the transceiver, monitors the PDCCH for paging based on the specific set of control resources; through the transceiver, receives a DCI from the PDCCH for paging from the base station, wherein the DCI includes information indicating whether the time domain resource allocation information for the PDSCH and the minimum scheduling offset are set, and includes a CRC scrambled by the P-RNTI for paging; and when the minimum scheduling offset for paging is set, a first slot offset for scheduling the PDSCH based on the minimum scheduling offset, the time domain resource allocation table, and the time domain resource allocation information Confirming, the system includes a processor configured to receive a paging message from the base station via the transceiver based on the first slot offset for paging in the PDSCH, and the terminal operates in a power-saving mode between the time when the DCI is received in the PDCCH and the time when reception occurs in the PDSCH.A method performed at a base station for resource allocation in a time domain in a wireless communication system according to an embodiment of the present disclosure comprises: transmitting to a terminal configuration information for a time domain resource allocation table applicable to a PDSCH, configuration information indicating a minimum scheduling offset for scheduling a PDSCH to receive a paging message for the terminal, and configuration information for a specific set of control resources for monitoring a PDSCH for paging; transmitting a DCI from the PDSCH for paging to the terminal, wherein the DCI includes information indicating whether the time domain resource allocation information for the PDSCH and the minimum scheduling offset are set, and includes a CRC scrambled by a P-RNTI for paging; and, when the minimum scheduling offset is set for paging, verifying a first slot offset for scheduling the PDSCH based on the minimum scheduling offset, the time domain resource allocation table, and the time domain resource allocation information; and transmitting a paging message from the PDSCH for paging based on the first slot offset.In a wireless communication system according to an embodiment of the present disclosure, a base station comprises a transceiver and, through the transceiver, transmits to a terminal configuration information regarding a time domain resource allocation table applicable to a PDSCH, configuration information indicating a minimum scheduling offset for scheduling a PDSCH to receive a paging message for the terminal, and configuration information regarding a specific set of control resources for monitoring a PDSCH for paging; through the transceiver, transmits a DCI from the PDSCH for paging to the terminal, wherein the DCI includes information indicating whether the time domain resource allocation information for the PDSCH and the minimum scheduling offset are set, and includes a CRC scrambled by the P-RNTI for paging; and when the minimum scheduling offset for paging is set, a first slot offset for scheduling the PDSCH is identified based on the minimum scheduling offset, the time domain resource allocation table, and the time domain resource allocation information, and through the transceiver, from the PDSCH for paging based on the first slot offset Includes a processor configured to send paging messages.

[0015] delete

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[0018] delete Brief explanation of the drawing

[0019] FIG. 1 illustrates a wireless communication system according to various embodiments of the present disclosure. FIG. 2 illustrates the configuration of a base station in a wireless communication system according to various embodiments of the present disclosure. FIG. 3 illustrates the configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure. FIG. 4 illustrates a flowchart of a terminal in a wireless communication system according to various embodiments of the present disclosure. FIG. 5 illustrates the resource structure of a wireless communication system according to various embodiments of the present disclosure. FIG. 6 illustrates the resource structure of a wireless communication system according to various embodiments of the present disclosure. FIG. 7 illustrates the structure of a bandwidth part in a wireless communication system according to various embodiments of the present disclosure. FIG. 8 illustrates the structure of a control resource set in a wireless communication system according to various embodiments of the present disclosure. FIG. 9 illustrates a resource structure in a wireless communication system according to various embodiments of the present disclosure. FIG. 10 illustrates the process of discontinuous reception (DRX) in a wireless communication system according to various embodiments of the present disclosure. FIG. 11 illustrates the process of paging in a wireless communication system according to various embodiments of the present disclosure. FIG. 12 illustrates the process of paging in a wireless communication system according to various embodiments of the present disclosure. FIG. 13 illustrates base station beam allocation according to TCI state setting in a wireless communication system according to various embodiments of the present disclosure. FIG. 14 illustrates the process of hierarchical signaling in a wireless communication system according to various embodiments of the present disclosure. FIG. 15 illustrates an example of a signaling structure in a wireless communication system according to various embodiments of the present disclosure. FIG. 16 illustrates an example of a time domain resource allocation method for a data channel in a wireless communication system according to various embodiments of the present disclosure. FIG. 17 is a drawing illustrating base station operation according to one embodiment of the present disclosure. FIG. 18 is a drawing illustrating a terminal operation according to one embodiment of the present disclosure. Specific details for implementing the invention

[0020] The terms used in this disclosure are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. A singular expression may include a plural expression unless the context clearly indicates otherwise. Terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art described in this disclosure. Terms used in this disclosure that are defined in a general dictionary may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this disclosure. In some cases, even terms defined in this disclosure are not to be interpreted to exclude the embodiments of this disclosure.

[0021] In the various embodiments of the present disclosure described below, a hardware-based approach is described as an example. However, since the various embodiments of the present disclosure include techniques using both hardware and software, the various embodiments of the present disclosure do not exclude a software-based approach.

[0022] It will be understood that in this disclosure, each block of the drawings and combinations of the flowchart drawings can be performed by computer program instructions. Since these computer program instructions can be loaded into the processor of a general-purpose computer, a computer for special purposes, or other programmable data processing equipment, the instructions performed through the processor of the computer or other programmable data processing equipment create means for performing the functions described in the flowchart block(s). Since these computer program instructions can also be stored in computer-available or computer-readable memory that can be directed toward the computer or other programmable data processing equipment to implement the function in a specific way, the instructions stored in computer-available or computer-readable memory can also produce a manufactured item containing means of instruction for performing the function described in the flowchart block(s). Since computer program instructions can be loaded onto a computer or other programmable data processing equipment, instructions that perform a series of operation steps on the computer or other programmable data processing equipment to create a process executed by the computer can also provide steps for executing the functions described in the flowchart block(s).

[0023] Additionally, each block may represent a module, segment, or part of code containing one or more executable instructions for executing a specified logical function(s). It should also be noted that in some alternative execution examples, the functions mentioned in the blocks may occur out of order. For instance, two blocks described in succession may actually be executed substantially simultaneously, or the blocks may be executed in reverse order according to their corresponding functions.

[0024] In this embodiment, the term "part" refers to a software or hardware component, such as an FPGA or ASIC, and the "part" performs certain roles. However, the meaning of "part" is not limited to software or hardware. The "part" may be configured to reside in an addressable storage medium or configured to operate one or more processors. Thus, as an example, the "part" includes components such as software components, object-oriented software components, class components, and task components, as well as processes, functions, attributes, procedures, subroutines, segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functions provided within the components and "parts" may be combined into a smaller number of components and "parts" or further separated into additional components and "parts." Furthermore, the components and "parts" may be implemented to operate one or more CPUs within a device or secure multimedia card. In addition, in the embodiments, '~part' may include one or more processors.

[0025] Wireless communication systems are evolving from providing early voice-oriented services to broadband wireless communication systems that provide high-speed, high-quality packet data services, such as communication standards like 3GPP’s HSPA (High Speed ​​Packet Access), LTE (Long Term Evolution or E-UTRA (Evolved Universal Terrestrial Radio Access)), LTE-Advanced (LTE-A), LTE-Pro, 3GPP2’s HRPD (High Rate Packet Data), UMB (Ultra Mobile Broadband), and IEEE’s 802.16e.

[0026] As a representative example of a wireless communication system, the LTE system employs the Orthogonal Frequency Division Multiplexing (OFDM) method for the downlink (DL) and the Single Carrier Frequency Division Multiple Access (SC-FDMA) method for the uplink (UL). The uplink refers to a wireless link through which a terminal (User Equipment (UE) or Mobile Station (MS)) transmits data or control signals to a base station (eNode B, or base station (BS)), and the downlink refers to a wireless link through which a base station transmits data or control signals to a terminal. The above multiple access method can distinguish the data or control information of each user by allocating and operating time-frequency resources to be sent for each user so that they do not overlap, that is, so that orthogonality is established.

[0027] As a future communication system following LTE, 5G communication systems must be able to freely reflect the diverse requirements of users and service providers, and therefore, services that satisfy various requirements simultaneously must be supported. Services being considered for 5G communication systems include enhanced Mobile Broadband (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliability Low Latency Communication (URLLC).

[0028] eMBB aims to provide data transmission speeds that are superior to those supported by existing LTE, LTE-A, or LTE-Pro. For example, in a 5G communication system, eMBB must be able to provide a peak data rate of 20 Gbps in the downlink and 10 Gbps in the uplink from the perspective of a single base station. Furthermore, while providing these peak data rates, the 5G communication system must also provide an increased user-perceived data rate. To satisfy these requirements, it necessitates improvements in various transmission and reception technologies, including enhanced Multi-Input Multi-Output (MIMO) transmission technology. Additionally, while LTE transmits signals using a maximum bandwidth of 20 MHz in the 2 GHz band, the 5G communication system can meet the data transmission speeds required by using a frequency bandwidth wider than 20 MHz in frequency bands of 3–6 GHz or above 6 GHz.

[0029] Simultaneously, mMTC is being considered to support application services such as the Internet of Things (IoT) in 5G communication systems. To efficiently provide IoT, mMTC requires support for a large number of terminal connections within a cell, improved terminal coverage, enhanced battery life, and reduced terminal costs. Since IoT devices are attached to various sensors and equipment to provide communication functions, a cell must be able to support a large number of terminals (e.g., 1,000,000 terminals / km²). Furthermore, due to the nature of the service, terminals supporting mMTC are likely to be located in dead zones not covered by cells, such as building basements; therefore, they may require wider coverage compared to other services provided by 5G communication systems. Terminals supporting mMTC must consist of low-cost devices, and since it is difficult to frequently replace terminal batteries, a very long battery life of 10 to 15 years may be required.

[0030] Finally, URLLC is a mission-critical cellular-based wireless communication service. For example, consider services used for remote control of robots or machinery, industrial automation, unmanned aerial vehicles, remote health care, and emergency alerts. Therefore, the communication provided by URLLC must offer very low latency and very high reliability. For instance, services supporting URLLC must satisfy an air interface latency of less than 0.5 milliseconds, and simultaneously 7 5The following packet error rate requirements apply. Therefore, for services supporting URLLC, 5G systems must provide a Transmit Time Interval (TTI) smaller than other services, and at the same time, design considerations may be required to allocate a wide resource in the frequency band to ensure the reliability of the communication link.

[0031] The three aforementioned 5G services, namely eMBB, URLLC, and mMTC, can be multiplexed and transmitted within a single system. In this case, different transmission and reception techniques and parameters may be used between the services to satisfy the different requirements of each service. Of course, 5G is not limited to the three aforementioned services.

[0032] In specifically describing the embodiments of the present disclosure, the focus is on the New RAN (NR) wireless access network and the packet core (5G System, or 5G Core Network, or NG Core: Next Generation Core) of the 5G mobile communication standard defined by 3GPP, a mobile communication standardization organization. However, the main point of the present disclosure is that it can be applied with slight modifications to systems of 5G or higher or other communication systems having a similar technical background, without significantly departing from the scope of the present disclosure, and this will be possible at the judgment of a person with skilled technical knowledge in the technical field of the present disclosure.

[0033] For convenience of explanation, some terms and names defined in 3GPP standards (specifications for 5G, NR, LTE, or similar systems) may be used. However, this disclosure is not limited by these terms and names and may be equally applied to systems conforming to other standards. Furthermore, terms used in the following description to identify a connection node, to refer to network entities, to refer to messages, to refer to interfaces between network entities, and to refer to various identification information are examples provided for the convenience of explanation. Therefore, this disclosure is not limited to the terms used in it, and other terms may be used to refer to objects having equivalent technical meanings.

[0034] FIG. 1 illustrates a wireless communication system according to various embodiments of the present disclosure.

[0035] FIG. 1 illustrates a base station (110), a terminal (120), and a terminal (130) as part of nodes utilizing a wireless channel in a wireless communication system. FIG. 1 illustrates only one base station, but other base stations identical or similar to the base station (110) may be included.

[0036] A base station (110) is a network infrastructure that provides wireless access to terminals (120, 130). The base station (110) has coverage defined as a certain geographical area based on the distance at which it can transmit signals. In addition to being a base station, the base station (110) may be referred to as an 'access point (AP)', 'eNodeB (eNB)', '5G node (5th generation node)', 'next generation nodeB (gNB)', 'wireless point', 'transmission / reception point (TRP)', or other terms having an equivalent technical meaning.

[0037] Each of the terminal (120) and terminal (130) is a device used by a user and performs communication with the base station (110) via a wireless channel. Each of the terminal (120) and terminal (130) may be referred to as 'user equipment (UE)', 'mobile station', 'subscriber station', 'remote terminal', 'wireless terminal', or 'user device', or other terms having an equivalent technical meaning, in addition to 'terminal'. Furthermore, in some cases, at least one of the terminal (120) and terminal (130) may be operated without user involvement. In this case, at least one of the terminal (120) and terminal (130) may be a device that performs machine type communication (MTC) and may not be carried by the user.

[0038] FIG. 2 illustrates the configuration of a base station in a wireless communication system according to various embodiments of the present disclosure.

[0039] The configuration exemplified in FIG. 2 can be understood as a configuration of a base station (110). Terms such as ‘~ unit’, ‘~ unit’ used below refer to a unit that processes at least one function or operation, and this can be implemented as hardware or software, or a combination of hardware and software.

[0040] Referring to FIG. 2, the base station includes a wireless communication unit (210), a backhaul communication unit (220), a storage unit (230), and a control unit (240).

[0041] The wireless communication unit (210) performs functions for transmitting and receiving signals through a wireless channel. For example, the wireless communication unit (210) performs a conversion function between a baseband signal and a bit sequence according to the physical layer specifications of the system. For example, when transmitting data, the wireless communication unit (210) generates complex symbols by encoding and modulating the transmitted bit sequence. Also, when receiving data, the wireless communication unit (210) restores the received bit sequence by demodulating and decoding the baseband signal.

[0042] Additionally, the wireless communication unit (210) upconverts a baseband signal into an RF (radio frequency) band signal and transmits it through an antenna, and downconverts the RF band signal received through the antenna into a baseband signal. To this end, the wireless communication unit (210) may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC (digital to analog converter), an ADC (analog to digital converter), etc. Additionally, the wireless communication unit (210) may include a plurality of transmission and reception paths. Furthermore, the wireless communication unit (210) may include at least one antenna array composed of a plurality of antenna elements.

[0043] In terms of hardware, the wireless communication unit (210) may be composed of a digital unit and an analog unit, and the analog unit may be composed of a plurality of sub-units depending on operating power, operating frequency, etc. The digital unit may be implemented with at least one processor (e.g., a digital signal processor (DSP)).

[0044] The wireless communication unit (210) transmits and receives signals as described above. Accordingly, all or part of the wireless communication unit (210) may be referred to as a 'transmitter', 'receiver', or 'transceiver'. Furthermore, in the following description, transmission and reception performed through a wireless channel are used to mean that processing as described above is performed by the wireless communication unit (210).

[0045] The backhaul communication unit (220) provides an interface for communicating with other nodes within the network. That is, the backhaul communication unit (220) converts a bit sequence transmitted from a base station to another node, e.g., another connection node, another base station, an upper node, a core network, etc., into a physical signal, and converts a physical signal received from another node into a bit sequence.

[0046] The storage unit (230) stores data such as basic programs, application programs, and configuration information for the operation of the base station. The storage unit (230) may be composed of volatile memory, non-volatile memory, or a combination of volatile memory and non-volatile memory. Additionally, the storage unit (230) provides the stored data upon request from the control unit (240).

[0047] The control unit (240) controls the overall operations of the base station according to the embodiments of the present disclosure described below. For example, the control unit (240) transmits and receives signals through the wireless communication unit (210) or through the backhaul communication unit (220). Additionally, the control unit (240) writes and reads data to and from the storage unit (230). Furthermore, the control unit (240) can perform the functions of a protocol stack required by the communication standard. According to another embodiment, the protocol stack may be included in the wireless communication unit (210). To this end, the control unit (240) may include at least one processor.

[0048] FIG. 3 illustrates the configuration of a terminal in a wireless communication system according to various embodiments of the present disclosure.

[0049] The configuration exemplified in FIG. 3 can be understood as a configuration of a terminal (120). Terms such as ‘~part’, ‘~unit’ used below refer to a unit that processes at least one function or operation, and this can be implemented as hardware or software, or a combination of hardware and software.

[0050] Referring to FIG. 3, the terminal includes a communication unit (310), a storage unit (320), and a control unit (330).

[0051] The communication unit (310) performs functions for transmitting and receiving signals through a wireless channel. For example, the communication unit (310) performs a conversion function between a baseband signal and a bit sequence according to the physical layer specifications of the system. For example, when transmitting data, the communication unit (310) generates complex symbols by encoding and modulating the transmitted bit sequence. Also, when receiving data, the communication unit (310) restores the received bit sequence by demodulating and decoding the baseband signal. Additionally, the communication unit (310) up-converts the baseband signal to an RF band signal and transmits it through an antenna, and down-converts the RF band signal received through the antenna to a baseband signal. For example, the communication unit (310) may include a transmission filter, a reception filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, etc.

[0052] Additionally, the communication unit (310) may include a plurality of transmission and reception paths. Furthermore, the communication unit (310) may include at least one antenna array composed of a plurality of antenna elements. In terms of hardware, the communication unit (310) may be composed of a digital circuit and an analog circuit (e.g., a radio frequency integrated circuit (RFIC)). Here, the digital circuit and the analog circuit may be implemented as a single package. Additionally, the communication unit (310) may include a plurality of RF chains. Furthermore, the communication unit (310) may perform beamforming.

[0053] The communication unit (310) transmits and receives signals as described above. Accordingly, all or part of the communication unit (310) may be referred to as a 'transmitter', 'receiver', or 'transceiver'. Additionally, in the following description, transmission and reception performed via a wireless channel are used to mean that processing as described above is performed by the communication unit (310).

[0054] The storage unit (320) stores data such as basic programs, application programs, and setting information for the operation of the terminal. The storage unit (320) may be composed of volatile memory, non-volatile memory, or a combination of volatile memory and non-volatile memory. Additionally, the storage unit (320) provides the stored data upon the request of the control unit (330).

[0055] The control unit (330) controls the overall operations of the terminal according to the embodiments of the present disclosure to be described below. For example, the control unit (330) transmits and receives signals through the communication unit (310). In addition, the control unit (330) writes and reads data in the storage unit (320). Furthermore, the control unit (330) can perform the functions of the protocol stack required by the communication standard. To this end, the control unit (330) may include at least one processor or microprocessor, or may be part of a processor. In addition, part of the communication unit (310) and the control unit (330) may be referred to as a communication processor (CP).

[0056] FIG. 4 illustrates a flowchart of a terminal in a wireless communication system according to various embodiments of the present disclosure. FIG. 4 illustrates a method of operation of the terminal (120).

[0057] Referring to FIG. 4, in step 401, the terminal receives a PDCCH (physical downlink control channel) configured with a P-RNTI (paging-radio network temporary identifier) ​​at a configured paging occasion. The paging procedure can be used to notify terminals in the IDLE or INACTIVE state of an incoming call and to initiate network connection for those terminals, or to notify terminals in the CONNECTED state that system information has changed. (The IDLE or INACTIVE state may refer to a state where the terminal has camped on to an arbitrary cell and is not connected to the RRC, and the CONNECTED state may refer to a state where the terminal has undergone an initial connection procedure and is connected to the RRC.)

[0058] Paging originates from the Access and Mobility Management Function (AMF), a network entity in the core network that performs paging and mobility control for terminals, and is transmitted to the terminal via the base station. More specifically, paging is initiated from the AMF, transmitted to the base station via S1AP (S1 application protocol) signaling, and then transmitted to the terminal via RRC signaling. At this time, the terminal can detect the presence of a paging message by monitoring the PDCCH configured as P-RNTI during the paging occasion. The paging occasion can be determined based on the DRX period set by the base station for the terminal.

[0059] In step 402, the terminal receives a physical downlink shared channel (PDSCH) containing a paging message that includes the identifier of the terminal based on the PDCCH. A terminal that receives a PDCCH configured as P-RNTI can receive a paging message (1106) from the PDSCH. The paging message may include terminal identifier (UE ID) information of the terminal that the base station intends to wake up.

[0060] The frame structure of the 5G system will be explained in more detail below with reference to the drawings.

[0061] FIG. 5 illustrates the resource structure of a wireless communication system according to various embodiments of the present disclosure. Specifically, FIG. 5 illustrates the basic structure of the time-frequency domain, which is a wireless resource domain in which data or a control channel is transmitted in a 5G system.

[0062] In FIG. 5, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. In the time and frequency domains, the basic unit of a resource is a resource element (RE, 501), which can be defined as one OFDM (Orthogonal Frequency Division Multiplexing) symbol (502) on the time axis and one subcarrier (503) on the frequency axis. In the frequency domain (For example, 12) consecutive REs can form a single resource block (Resource Block, RB, 504). In Fig. 5 is the number of OFDM symbols per subframe (510) for setting the subcarrier spacing (μ), and for a more specific description of the resource structure in a 5G system, refer to the TS 38.211 section 4 specification.

[0063] FIG. 6 illustrates the resource structure of a wireless communication system according to various embodiments of the present disclosure. Specifically, FIG. 6 illustrates a slot structure considered in a 5G system.

[0064] Referring to FIG. 6, an example of a frame (600), subframe (601), and slot (602) structure is illustrated. One frame (600) can be defined as 10ms. One subframe (601) can be defined as 1ms, and thus one frame (600) can be composed of a total of 10 subframes (601). One slot (602, 603) can be defined as 14 OFDM symbols (i.e., the number of symbols per slot ( )=14). A subframe (601) may be composed of one or more slots (602, 603), and the number of slots (602, 603) per subframe (601) may vary depending on the setting value μ (604, 605) for the subcarrier interval.

[0065] In one example of FIG. 6, cases where the subcarrier spacing setting value is μ=0 (604) and μ=1 (605) are illustrated. When μ=0 (604), one subframe (601) can be composed of one slot (602), and when μ=1 (605), one subframe (601) can be composed of two slots (603). That is, depending on the setting value μ for subcarrier spacing, the number of slots per subframe ( ) may vary, and accordingly, the number of slots per frame ( ) may vary. Depending on each subcarrier spacing setting μ and It can be defined by the following [Table 1].

[0066] [Table 1]

[0067]

[0068] Next, the Bandwidth Part (BWP) setting in a 5G communication system will be explained in detail with reference to the drawing.

[0069] FIG. 7 illustrates the structure of a bandwidth part in a wireless communication system according to various embodiments of the present disclosure. Specifically, FIG. 7 is a drawing illustrating an example of a configuration for a bandwidth part in a 5G communication system.

[0070] Referring to FIG. 7, an example is shown in which the terminal bandwidth (UE bandwidth) (700) is configured into two bandwidth parts, namely Bandwidth Part #1 (BWP#1) (701) and Bandwidth Part #2 (BWP#2) (702). The base station may configure one or more bandwidth parts for the terminal and may configure information for each bandwidth part as shown in [Table 2] below.

[0071] [Table 2]

[0072]

[0073] In [Table 2] above, "locationAndBandwidth" indicates the location and bandwidth in the frequency domain of the bandwidth part, "cyclicPrefix" indicates whether an extended CP (cyclic prefix) is used for the bandwidth part, and "subcarrierSpacing" indicates the subcarrier spacing to be used in the bandwidth part.

[0074] Various embodiments of the present disclosure are not limited to the examples above, and various parameters related to the bandwidth part may be set for the terminal in addition to the setting information. The information may be transmitted by the base station to the terminal via upper layer signaling, for example, Radio Resource Control (RRC) signaling. Among the one or more configured bandwidth parts, at least one bandwidth part may be activated. Whether the configured bandwidth part is activated may be transmitted semi-statically from the base station to the terminal via RRC signaling or dynamically via Downlink Control Information (DCI).

[0075] According to one embodiment, prior to the Radio Resource Control (RRC) connection, the terminal may receive an Initial Bandwidth Part (Initial BWP) for initial connection from the base station via a Master Information Block (MIB). More specifically, during the initial connection phase, the terminal may receive configuration information for a Control Resource Set (CORESET) and a Search Space via the MIB, through which a PDCCH for receiving system information required for initial connection (which may correspond to Remaining System Information, RMSI, or System Information Block 1, SIB1) can be transmitted. The Control Resource Set (CORESET) and the Search Space configured via the MIB may each be considered as Identity (ID) 0. The Control Resource Set and the Search Space configured via the MIB may each be a common Control Resource Set and a common Search Space. The base station may notify the terminal of configuration information, such as frequency allocation information, time allocation information, and numerology, for Control Resource Set #0 via the MIB. Additionally, the base station may notify the terminal of configuration information regarding the monitoring period and paging occasion for Control Resource Set #0, i.e., configuration information for Search Space #0, via the MIB. The terminal may regard the frequency range configured as Control Resource Set #0 obtained from the MIB as the initial bandwidth part for initial access. In this case, the identifier (ID) of the initial bandwidth part may be considered as 0.

[0076] The settings for the bandwidth part supported by the above 5G can be used for various purposes.

[0077] According to one embodiment, if the bandwidth supported by the terminal is smaller than the system bandwidth, this can be supported through the bandwidth part setting. For example, by setting the frequency position of the bandwidth part to the terminal, the terminal can transmit and receive data at a specific frequency position within the system bandwidth.

[0078] According to one embodiment, a base station may set multiple bandwidth parts for a terminal for the purpose of supporting different numerologies. For example, to support data transmission and reception using both a 15 kHz subcarrier interval and a 30 kHz subcarrier interval for a terminal, two bandwidth parts may be set to subcarrier intervals of 15 kHz and 30 kHz, respectively. Different bandwidth parts may be frequency division multiplexed, and when data transmission and reception is to be performed at a specific subcarrier interval, the bandwidth part set to that subcarrier interval may be activated.

[0079] According to one embodiment, for the purpose of reducing the power consumption of the terminal, a base station may set a bandwidth part having a different bandwidth size for the terminal. For example, if the terminal supports a very large bandwidth, such as 100 MHz, and always transmits and receives data using that bandwidth, very large power consumption may occur. In particular, in a situation where there is no traffic, monitoring an unnecessary downlink control channel using a large bandwidth of 100 MHz may be very inefficient in terms of power consumption. For the purpose of reducing the power consumption of the terminal, the base station may set a bandwidth part with a relatively small bandwidth, such as 20 MHz, for the terminal. In a situation where there is no traffic, the terminal can perform monitoring operations in the 20 MHz bandwidth part, and when data is generated, it can transmit and receive data using the 100 MHz bandwidth part according to the instructions of the base station.

[0080] Regarding the method of configuring the bandwidth part, terminals prior to RRC connection (Connected) can receive configuration information for the Initial Bandwidth Part through the Master Information Block (MIB) during the initial connection phase. More specifically, the terminal can receive a Control Resource Set (CORESET) for a downlink control channel through which Downlink Control Information (DCI), which schedules System Information Blocks (SIB), can be transmitted, from the MIB of the Physical Broadcast Channel (PBCH). The bandwidth of the Control Resource Set configured via the MIB can be considered as the Initial Bandwidth Part, and through the configured Initial Bandwidth Part, the terminal can receive SIBs from the Physical Downlink Shared Channel (PDSCH). In addition to receiving SIBs, the Initial Bandwidth Part may also be utilized for Other System Information (OSI), paging, and Random Access.

[0081] When one or more bandwidth parts are set for a terminal, the base station may instruct the terminal to change the bandwidth part using the Bandwidth Part Indicator field within the DCI. For example, in FIG. 7, if the currently active bandwidth part of the terminal is Bandwidth Part #1 (701), the base station may instruct the terminal to Bandwidth Part #2 (702) using the Bandwidth Part Indicator within the DCI, and the terminal may perform a bandwidth part change to Bandwidth Part #2 (702) indicated by the received Bandwidth Part Indicator within the DCI.

[0082] As mentioned above, since DCI-based bandwidth part changes can be directed by a DCI scheduling a PDSCH or PUSCH (Physical Uplink Shared Channel), when a terminal receives a bandwidth part change request, it must be able to seamlessly receive or transmit the PDSCH or PUSCH scheduled by the corresponding DCI in the changed bandwidth part. To this end, the standard specifies the delay time (T) required when changing a bandwidth part. BWP The requirements for ) have been specified and can be defined, for example, as shown in [Table 3] below.

[0083] [Table 3]

[0084]

[0085] The requirements for bandwidth part change delay time support Type 1 or Type 2 depending on the terminal's capability. The terminal can report the supported bandwidth part delay time type to the base station.

[0086] In accordance with the aforementioned requirements for the bandwidth part change delay time, if the terminal receives a DCI containing a bandwidth part change indicator in slot n, the terminal performs a change to the new bandwidth part indicated by the bandwidth part change indicator in slot n+T BWP Completion can be performed at a time no later than the new bandwidth part, and transmission and reception for the data channel scheduled by the corresponding DCI can be performed in the changed new bandwidth part. If the base station intends to schedule a data channel in the new bandwidth part, the terminal's bandwidth part change delay time (T BWPConsidering ), time domain resource allocation (TDRA) for a data channel can be determined. That is, when a base station schedules a data channel with a new bandwidth part, in the method for determining time domain resource allocation for a data channel, the data channel can be scheduled after the bandwidth part change delay time. Accordingly, the terminal [is notified] that the DCI instructing the bandwidth part change is the bandwidth part change delay time (T BWP You may not expect to indicate a slot offset (K0 or K2) value smaller than )

[0087] If a terminal receives a DCI (e.g., DCI format 1_1 or 0_1) indicating a change in bandwidth part, the terminal may not perform any transmission or reception during the corresponding time interval from the third symbol of the slot in which the PDCCH containing the said DCI was received to the beginning of the slot indicated by the slot offset value (K0 or K2) indicated in the time domain resource allocation indicator field within the said DCI. For example, if a terminal receives a DCI indicating a change in bandwidth part in slot n, and the slot offset value indicated by the said DCI is K, the terminal may not perform any transmission or reception from the third symbol of slot n to the symbol before slot n+K (i.e., the last symbol of slot n+K-1).

[0088] Next, we will explain the SS (Synchronization Signal) / PBCH block (referred to as the Synchronization Signal Block (SSB)) in 5G.

[0089] An SS / PBCH block may refer to a physical layer channel block composed of PSS (Primary SS), SSS (Secondary SS), and PBCH (Physical Broadcast Channel). Specifically, the composition of the SS / PBCH block is as follows.

[0090] - PSS: A signal that serves as the reference for downlink time / frequency synchronization and provides some information about the cell ID.

[0091] - SSS: Serves as the reference for downlink time / frequency synchronization and provides the remaining cell ID information not provided by PSS. Additionally, it can serve as a reference signal for PBCH demodulation.

[0092] - PBCH: Provides essential system information required for the transmission and reception of the terminal's data and control channels. The essential system information may include search space-related control information representing wireless resource mapping information of the control channel, scheduling control information for a separate data channel transmitting system information, etc.

[0093] The above SS / PBCH block is composed of a combination of PSS, SSS, and PBCH. One or more SS / PBCH blocks may be transmitted within a time of 5ms, and each transmitted SS / PBCH block may be distinguished by an index.

[0094] The terminal can detect PSS and SSS during the initial connection phase and can decode PBCH. It can obtain MIB from PBCH and receive configuration for Control Resource Set (CORESET) #0 (which may correspond to a Control Resource Set index or a Control Resource Set with an ID (Identity) of 0) and Search Space #0 (which may correspond to a Search Space index or a Search Space with an ID of 0). The terminal can perform monitoring of Control Resource Set #0 by assuming that the selected SS / PBCH block and the Demodulation Reference Signal (DMRS) transmitted from Control Resource Set #0 are Quasi-Co-Locations (QCL). The terminal can receive system information based on downlink control information transmitted from Control Resource Set #0. From the received system information, the terminal can obtain configuration information related to the Random Access Channel (RACH) required for initial connection. The terminal can transmit PRACH (Physical RACH) to the base station considering the selected SS / PBCH index, and the base station receiving the PRACH can obtain information about the SS / PBCH block index selected by the terminal. The base station can know that the terminal has selected a block among the respective SS / PBCH blocks and is monitoring the control resource set #0 associated with it.

[0095] Next, Downlink Control Information (DCI) in 5G systems will be explained in detail.

[0096] In a 5G system, scheduling information for uplink data (or Physical Uplink Shared Channel (PUSCH)) or downlink data (or Physical Downlink Shared Channel (PDSCH)) is transmitted from the base station to the terminal via DCI. The terminal can monitor the fallback DCI format and the non-fallback DCI format for PUSCH or PDSCH. The fallback DCI format may consist of fixed fields predefined between the base station and the terminal, and the non-fallback DCI format may include configurable fields.

[0097] DCI can be transmitted via the Physical Downlink Control Channel (PDCCH) after undergoing channel coding and modulation processes. A Cyclic Redundancy Check (CRC) is attached to the DCI message payload, and the CRC can be scrambled into a Radio Network Temporary Identifier (RNTI) corresponding to the terminal's identification information. Different RNTIs may be used depending on the purpose of the DCI message, such as UE-specific data transmission, power control commands, or random access responses. In other words, the RNTI is not explicitly transmitted but is included in the CRC calculation process. Upon receiving a DCI transmitted over the PDCCH, the terminal checks the CRC using the assigned RNTI; if the CRC check result is correct, the terminal knows that the corresponding DCI has been transmitted to it.

[0098] For example, a DCI scheduling a PDSCH for System Information (SI) can be scrambled into an SI-RNTI. A DCI scheduling a PDSCH for a Random Access Response (RAR) message can be scrambled into an RA-RNTI. A DCI scheduling a PDSCH for a Paging message can be scrambled into a P-RNTI. A DCI notifying a Slot Format Indicator (SFI) can be scrambled into an SFI-RNTI. A DCI notifying a Transmit Power Control (TPC) can be scrambled into a TPC-RNTI. A DCI scheduling a terminal-specific PDSCH or PUSCH can be scrambled into a C-RNTI (Cell RNTI), MCS-C-RNTI (Modulation Coding Scheme C-RNTI), or CS-RNTI (Configured Scheduling RNTI).

[0099] DCI format 0_0 can be used as a countermeasure DCI for scheduling PUSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 0_0 with the CRC scrambled with C-RNTI may include, for example, the information in [Table 4] below.

[0100] [Table 4]

[0101]

[0102] DCI format 0_1 ​​can be used as a non-defense DCI for scheduling PUSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 0_1 ​​with the CRC scrambled with C-RNTI may include, for example, the information in [Table 5a] to [Table 5b] below. [Table 5a] to [Table 5d] are a series of fields (information) included in DCI format 0_1 ​​separated for convenience.

[0103] [Table 5a]

[0104]

[0105] [Table 5b]

[0106]

[0107] [Table 5c]

[0108]

[0109] [Table 5d]

[0110]

[0111] DCI format 1_0 can be used as a countermeasure DCI for scheduling PDSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 1_0 with the CRC scrambled with C-RNTI may include, for example, the information in [Table 6] below.

[0112] [Table 6]

[0113]

[0114] DCI format 1_1 can be used as a non-defense DCI for scheduling PDSCH, in which case the CRC can be scrambled with C-RNTI. DCI format 1_1 with the CRC scrambled with C-RNTI may include, for example, the information in [Table 7a] to [Table 7c] below. [Table 7a] to [Table 7c] are a series of fields (information) included in DCI format 1_1 separated for convenience.

[0115] [Table 7a]

[0116]

[0117] [Table 7b]

[0118]

[0119] [Table 7c]

[0120]

[0121] The following describes the time domain resource allocation method for data channels in a 5G communication system.

[0122] The base station may set a table for time-domain resource allocation information for the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH) for the terminal using upper-layer signaling (e.g., RRC signaling). For PDSCH, a table consisting of a maximum of maxNrofDL-Allocations = 16 entries may be set, and for PUSCH, a table consisting of a maximum of maxNrofUL-Allocations = 16 entries may be set. Time domain resource allocation information may include, for example, PDCCH-to-PDSCH slot timing (corresponding to a slot-unit time interval between the time when the PDCCH is received and the time when the PDSCH scheduled by the received PDCCH is transmitted, denoted as K0) or PDCCH-to-PUSCH slot timing (corresponding to a slot-unit time interval between the time when the PDCCH is received and the time when the PUSCH scheduled by the received PDCCH is transmitted, denoted as K2), information on the position of the starting symbol and the length of the scheduled symbol within the slot for the PDSCH or PUSCH, and the mapping type of the PDSCH or PUSCH. For example, information such as that shown in [Table 8] and [Table 9] below may be notified from the base station to the terminal via upper layer signaling (e.g., RRC signaling) or L1 signaling (e.g., DCI).

[0123] [Table 8]

[0124]

[0125] [Table 9]

[0126]

[0127] The base station may notify the terminal of one of the entries in the table for the time domain resource allocation information via L1 signaling (e.g., DCI) (e.g., may indicate the 'time domain resource allocation' field within the DCI). The terminal may obtain time domain resource allocation information for PDSCH or PUSCH based on the DCI received from the base station.

[0128] The following describes the frequency domain resource allocation method for data channels in a 5G communication system.

[0129] In 5G, two types, for example, resource allocation type 0 and resource allocation type 1, are supported as a method of indicating frequency domain resource allocation information for the Physical Downlink Shared Channel (PDSCH) and the Physical Uplink Shared Channel (PUSCH).

[0130] Resource allocation type 0

[0131] RB allocation information may be notified from the base station to the terminal in the form of a bitmap for the RBG (Resource Block Group). In this case, the RBG may be composed of a set of consecutive VRBs (Virtual RBs), and the size P of the RBG may be determined based on the value set by the upper layer parameter (rbg-Size) and the size value of the bandwidth part defined in [Table 10] below.

[0132] [Table 10]

[0133]

[0134] The size Total number of RGBs in bandwidth part i ( ) can be defined as shown in the following mathematical formula.

[0135] Here

[0136] The size of the first RBG is And,

[0137] The size of the last RBG is and the size of the remaining RBGs is P.

[0138] Each bit of a bitmap of bit size can correspond to a respective RGB. The RGBs can be indexed in increasing order of frequency, starting from the lowest frequency position in the bandwidth part. Within the bandwidth part For the RBGs, from RBG#0 to RBG#( ) can be mapped from the MSB to the LSB of the RGB bitmap. The terminal can determine that the RGB corresponding to the bit value is assigned when the specific bit value in the bitmap is 1, and can determine that the RGB corresponding to the bit value is not assigned when the specific bit value in the bitmap is 0.

[0139] Resource Allocation Type 1

[0140] RB allocation information can be notified from the base station to the terminal as information regarding the starting position and length of consecutively allocated VRBs. At this time, interleaving or non-interleaving may be additionally applied to the consecutively allocated VRBs. The resource allocation field of Resource Allocation Type 1 may be composed of a Resource Indication Value (RIV), and the RIV is the starting point of the VRB ( ) and the length of consecutively allocated RB( It can be composed of. More specifically, The RIV within the bandwidth part of the size can be defined as follows.

[0141]

[0142]

[0143] The base station can set the resource allocation type to the terminal through upper layer signaling (for example, the upper layer parameter resourceAllocation can be set to one of resourceAllocationType0, resourceAllocationType1, or dynamicSwitch). If the terminal is set to both resource allocation types 0 and 1 (or if the upper layer parameter resourceAllocation is set to dynamicSwitch), the bit corresponding to the MSB (Most Significant Bit) of the resource allocation field within the DCI format that directs scheduling can indicate whether it is resource allocation type 0 or resource allocation type 1, and based on the indicated resource allocation type, resource allocation information can be indicated through the remaining bits excluding the bit corresponding to the MSB, and the terminal can interpret the resource allocation field information of the DCI field based on this. If the terminal is set to either resource allocation type 0 or resource allocation type 1 (or if the upper layer parameter resourceAllocation is set to either resourceAllocationType0 or resourceAllocationType1), resource allocation information may be indicated based on the resource allocation type in which the resource allocation field in the DCI format instructing scheduling is set, and the terminal may interpret the resource allocation field information of the DCI field based on this.

[0144] In the following, the downlink control channel in a 5G communication system will be explained in more detail with reference to the drawings.

[0145] FIG. 8 illustrates the structure of a control resource set in a wireless communication system according to various embodiments of the present disclosure.

[0146] Specifically, FIG. 8 illustrates an example of a Control Resource Set (CORESET) in which a downlink control channel is transmitted in a 5G wireless communication system. FIG. 8 illustrates an example in which two Control Resource Sets (Control Resource Set #1 (801), Control Resource Set #2 (802)) are set within a terminal bandwidth part (UE bandwidth part) (810) in the frequency axis and one slot (820) in the time axis. The Control Resource Set can be set to a specific frequency resource within the entire terminal bandwidth part (810) in the frequency axis. In FIG. 8, the specific frequency resource (803) illustrates an example of a frequency resource set to Control Resource Set #1 (801). The Control Resource Set can be set to one or more OFDM symbols in the time axis and can be defined as the Control Resource Set Duration (804).

[0147] Referring to FIG. 8, control resource set #1 (801) is set to a control resource set length of 2 symbols, and control resource set #2 (802) is set to a control resource set length of 1 symbol.

[0148] The control resource set in the aforementioned 5G can be configured by a base station to a terminal via upper-layer signaling (e.g., System Information, MIB (Master Information Block), RRC (Radio Resource Control) signaling) or DCI. Configuring a control resource set to a terminal means providing information such as the control resource set identifier, the frequency location of the control resource set, and the symbol length of the control resource set. Configuration information for the control resource set may include, for example, the information in [Table 11] below.

[0149] [Table 11]

[0150]

[0151] In [Table 11], the tci-StatesPDCCH (simply named TCI (Transmission Configuration Indication) state) configuration information may include information on one or more SS (Synchronization Signal) / PBCH (Physical Broadcast Channel) block (i.e., Synchronization Signal Block (SSB)) indices or CSI-RS (Channel State Information Reference Signal) indices that are in a QCL (Quasi Co Located) relationship with the DMRS transmitted from the corresponding control resource set.

[0152] FIG. 9 illustrates a resource structure in a wireless communication system according to various embodiments of the present disclosure.

[0153] Specifically, FIG. 9 illustrates an example of a basic unit of time and frequency resources that constitute a downlink control channel that can be used in 5G.

[0154] Referring to FIG. 9, the basic unit of time and frequency resources constituting a downlink control channel (e.g., PDCCH) can be called a REG (Resource Element Group, 903), and the REG (903) can be defined as 1 OFDM symbol (901) on the time axis and 1 PRB (Physical Resource Block, 902) on the frequency axis, i.e., 12 subcarriers. A base station can concatenate REGs (903) to form a downlink control channel allocation unit.

[0155] Referring to FIG. 9, if the basic unit to which a downlink control channel is allocated in 5G is called a CCE (Control Channel Element, 904), then 1 CCE (904) can be composed of multiple REGs (903). For example, the REG (903) shown in FIG. 9 can be composed of 12 REs, and if 1 CCE (904) is composed of, for example, 6 REGs (903), then 1 CCE (904) can be composed of 72 REs. When a downlink control resource set is established, the corresponding area can be composed of multiple CCEs (904), and a specific downlink control channel can be mapped to one or multiple CCEs (904) and transmitted according to the Aggregation Level (AL) within the control resource set. The CCEs (904) in the control resource set are distinguished by numbers, and the numbers of the CCEs (904) can be assigned according to a logical mapping method.

[0156] Referring to FIG. 9, the basic unit of a downlink control channel, namely REG (903), may include both REs to which DCI is mapped and areas to which DMRS (905), a reference signal for decoding, is mapped. As shown in FIG. 9, for example, three DMRS (905) may be transmitted within one REG (903). The number of CCEs required to transmit a PDCCH may be 1, 2, 4, 8, or 16 depending on the Aggregation Level (AL), and different numbers of CCEs may be used to implement link adaptation of the downlink control channel. For example, when AL=L, one downlink control channel may be transmitted through L CCEs. The terminal must detect a signal without knowing information about the downlink control channel, and a search space representing a set of CCEs is defined for blind decoding. A search space is a set of downlink control channel candidates consisting of CCEs that a terminal must attempt to decode at a given aggregation level, and since there are various aggregation levels that form a group of 1, 2, 4, 8, or 16 CCEs, a terminal may have multiple search spaces. A search space set can be defined as a set of search spaces at all configured aggregation levels.

[0157] Search spaces can be classified into common search spaces and UE-specific search spaces. A certain group of terminals or all terminals may examine the common search space of the PDCCH to receive cell-common control information, such as dynamic scheduling or paging messages regarding system information. For example, PDSCH scheduling allocation information for the transmission of SIBs containing cell operator information can be received by examining the common search space of the PDCCH. In the case of the common search space, since a certain group of terminals or all terminals must receive the PDCCH, it can be defined as a set of pre-agreed CCEs. Scheduling allocation information for a UE-specific PDSCH or PUSCH can be received by examining the UE-specific search space of the PDCCH. The UE-specific search space can be defined specifically as a function of the terminal's identity and various system parameters.

[0158] In 5G, parameters for the search space for a PDCCH can be configured from the base station to the terminal via upper-layer signaling (e.g., SIB, MIB, RRC signaling). For example, the base station may configure the terminal the number of PDCCH candidates at each aggregation level L, the monitoring period for the search space, the opportunity to monitor at the symbol level within the slot for the search space, the search space type (common search space or terminal-specific search space), the combination of DCI format and RNTI to be monitored in the search space, and the control resource set index to be monitored in the search space. For example, the configuration information for the search space for a PDCCH may include the information in [Table 12] below.

[0159] [Table 12]

[0160]

[0161] According to the above configuration information, the base station may set one or multiple search space sets for the terminal. According to one embodiment, the base station may set search space set 1 and search space set 2 for the terminal, and may set DCI format A scrambled with X-RNTI in search space set 1 to be monitored in a common search space, and may set DCI format B scrambled with Y-RNTI in search space set 2 to be monitored in a terminal-specific search space. In the X-RNTI and Y-RNTI, "X" and "Y" may correspond to one of the various RNTIs described below.

[0162] According to the above configuration information, one or more sets of search spaces may exist in a common search space or a terminal-specific search space. For example, Search Space Set #1 and Search Space Set #2 may be configured as a common search space, and Search Space Set #3 and Search Space Set #4 may be configured as a terminal-specific search space.

[0163] In the common search space, a combination of the following DCI format and RNTI can be monitored. Of course, the various embodiments of the present disclosure are not limited to the following examples.

[0164] DCI format 0_0 / 1_0 with CRC scrambled by C-RNTI, CS-RNTI, MCS-C-RNTI, SP-CSI-RNTI, RA-RNTI, TC-RNTI, P-RNTI, or SI-RNTI

[0165] DCI format 2_0 with CRC scrambled by SFI-RNTI

[0166] DCI format 2_1 with CRC scrambled by INT-RNTI

[0167] DCI format 2_2 with CRC scrambled by TPC-PUSCH-RNTI, TPC-PUCCH-RNTI

[0168] DCI format 2_3 with CRC scrambled by TPC-SRS-RNTI

[0169] In a terminal-specific search space, a combination of the following DCI format and RNTI may be monitored. Of course, various embodiments of the present disclosure are not limited to the following examples.

[0170] DCI format 0_0 / 1_0 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

[0171] DCI format 1_0 / 1_1 with CRC scrambled by C-RNTI, CS-RNTI, TC-RNTI

[0172] The specified RNTIs may follow the definitions and uses below.

[0173] C-RNTI (Cell RNTI): Used for terminal-specific PDSCH scheduling

[0174] MCS-C-RNTI (Modulation Coding Scheme C-RNTI): Used for terminal-specific PDSCH scheduling

[0175] TC-RNTI (Temporary Cell RNTI): Used for terminal-specific PDSCH scheduling

[0176] CS-RNTI (Configured Scheduling RNTI): Used for semi-statically configured terminal-specific PDSCH scheduling.

[0177] RA-RNTI (Random Access RNTI): Used for PDSCH scheduling in the random access phase

[0178] P-RNTI (Paging RNTI): Used for PDSCH scheduling where paging is transmitted.

[0179] SI-RNTI (System Information RNTI): Used for PDSCH scheduling where system information is transmitted.

[0180] INT-RNTI (Interruption RNTI): Used to indicate whether PDSCH is pucturing.

[0181] TPC-PUSCH-RNTI (Transmit Power Control for PUSCH RNTI): Used to instruct power control commands to the PUSCH

[0182] TPC-PUCCH-RNTI (Transmit Power Control for PUCCH RNTI): Used to instruct power control commands to the PUCCH

[0183] TPC-SRS-RNTI (Transmit Power Control for SRS RNTI): Used to instruct power regulation commands to the SRS

[0184] The aforementioned specified DCI formats may follow the definitions in [Table 13] below.

[0185] [Table 13]

[0186]

[0187] In 5G, the search space of aggregation level L in the control resource set p and search space set s can be expressed as [Equation 1] below.

[0188] [Mathematical Formula 1]

[0189]

[0190] -L: Lamination level

[0191] -n CI : Carrier Index

[0192] -N CCE,p : Total number of CCEs existing in control resource set p

[0193] -n μ s,f : Slot Index

[0194] -M (L) p,s,max : Number of PDCCH candidates at assembly level L

[0195] -m snCI = 0, ..., M (L) p,s,max -1: PDCCH candidate index of aggregation level L

[0196] -i = 0, ..., L-1

[0197]

[0198] -n RNTI : Terminal identifier

[0199] Y_(p,n μ s,f The value of ) may correspond to 0 in the case of a common search space.

[0200] Y_(p,n μ s,f In the case of a terminal-specific search space, the value may correspond to a value that changes according to the terminal's identity (C-RNTI or ID set by the base station for the terminal) and time index.

[0201] FIG. 10 illustrates the process of discontinuous reception (DRX) in a wireless communication system according to various embodiments of the present disclosure.

[0202] Specifically, FIG. 10 is a diagram illustrating the Discontinuous Reception (DRX) operation. Discontinuous Reception (DRX) is an operation in which a terminal using a service receives data discontinuously while in an RRC Connected state, where a wireless link is established between the base station and the terminal. This DRX operation is also referred to as DRX operation in an RRC Connected state (i.e., C-DRX). When DRX is applied, the terminal can turn on the receiver at a specific point in time to monitor the control channel, and turn off the receiver if no data is received for a certain period to reduce the terminal's power consumption. The DRX operation can be controlled by a MAC layer device based on various parameters and timers.

[0203] Referring to FIG. 10, the active time (1005) is the time during which the terminal wakes up at each DRX cycle to monitor the PDCCH. The active time (1005) can be defined as follows.

[0204] - drx-onDurationTimer or drx-InactivityTimer or drx-RetransmissionTimerDL or drx-RetransmissionTimerUL or ra-ContentionResolutionTimer is running (drx-onDurationTimer or drx-InactivityTimer or drx-RetransmissionTimerDL or drx-RetransmissionTimerUL or ra-ContentionResolutionTimer is running); or

[0205] - A scheduling request is sent on PUCCH and is pending; or

[0206] - A PDCCH indicating a new transmission addressed to the C-RNTI of the MAC entity has not been received after successful reception of a Random Access Response for the Random Access Preamble not selected by the MAC entity among the contention-based Random Access Preamble

[0207] The above DRX-related timers, such as drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerDL, drx-RetransmissionTimerUL, and ra-ContentionResolutionTimer, are timers whose values ​​are set by the base station, and have the function of setting the terminal to monitor the PDCCH when certain conditions are satisfied.

[0208] drx-onDurationTimer (1015) is a parameter for setting the minimum time the terminal stays awake during a DRX cycle. drx-InactivityTimer (1020) is a parameter for setting the additional time the terminal stays awake when receiving a PDCCH (1030) instructing a new uplink transmission or downlink transmission. drx-RetransmissionTimerDL is a parameter for setting the maximum time the terminal stays awake to receive a downlink retransmission in a downlink HARQ procedure. The above-mentioned drx-RetransmissionTimerUL is a parameter for setting the maximum time the terminal stays awake to receive an uplink retransmission grant in an uplink HARQ procedure. drx-onDurationTimer, drx-InactivityTimer, drx-RetransmissionTimerDL, and drx-RetransmissionTimerUL can be set as, for example, time, number of subframes, number of slots, etc. ra-ContentionResolutionTimer is a parameter for monitoring PDCCH in a random access procedure.

[0209] The inactive time (1010) is a time during which the PDCCH is not monitored or / or the PDCCH is not received during the DRX operation, and the remaining time after subtracting the active time (1005) from the total time of performing the DRX operation may be the inactive time (1010). If the terminal does not monitor the PDCCH during the active time (1005), it may enter a sleep or inactive state to reduce power consumption.

[0210] The DRX cycle refers to the period during which a terminal wakes up and monitors the PDCCH. In other words, it refers to the time interval or on-duration occurrence cycle between when the terminal monitors a PDCCH and when it monitors the next PDCCH. There are two types of DRX cycles: short DRX cycle and long DRX cycle. The short DRX cycle can be applied optionally.

[0211] The long DRX cycle (1025) is the longer of the two DRX cycles set in the terminal. While operating with the long DRX cycle, the terminal restarts the drx-onDurationTimer (1015) at a point where the long DRX cycle (1025) has elapsed from the starting point (e.g., start symbol) of the drx-onDurationTimer (1015). When operating with the long DRX cycle (1025), the terminal may start the drx-onDurationTimer (1015) in a slot after the drx-SlotOffset in a subframe satisfying [Equation 2] below. Here, drx-SlotOffset represents the delay before starting the drx-onDurationTimer (1015). drx-SlotOffset can be set to, for example, time, number of slots, etc.

[0212] [Mathematical Formula 2]

[0213]

[0214] Here, drx-LongCycleStartOffset may include a long DRX cycle (1025) and drx-StartOffset, and may be used to define the subframe to start the long DRX cycle (1025). drx-LongCycleStartOffset may be set, for example, as a time, the number of subframes, the number of slots, etc.

[0215] A short DRX cycle is the shorter of the two DRX cycles defined in the terminal. The terminal operates in a long DRX cycle (1025), and when a specific event occurs during the active time (1005), such as receiving a PDCCH (1030) instructing a new uplink transmission or downlink transmission, it starts or restarts the drx-InactivityTimer (1020), and if the drx-InactivityTimer (1020) expires or a DRX command MAC CE is received, it can operate in a short DRX cycle. For example, in FIG. 10, the terminal may start drx-ShortCycleTimer at the expiration of the previous drx-onDurationTimer (1015) or drx-InactivityTimer (1020) and operate in a short DRX cycle until the drx-ShortCycleTimer expires. When the terminal receives a PDCCH (1030) directing a new uplink transmission or downlink transmission, it may extend the Active Time (1005) or delay the arrival of the Inactive Time (1010) in anticipation of additional uplink transmission or downlink transmission in the future. While operating in a short DRX cycle, the terminal starts drx-onDurationTimer (1015) again at a time when a short DRX cycle has elapsed from the start of the previous On duration. After that, when drx-ShortCycleTimer expires, the terminal operates again in a long DRX cycle (Long DRX cycle) (1025).

[0216] When operating with a short DRX cycle, the terminal may start drx-onDurationTimer (1015) after drx-SlotOffset in a subframe satisfying [Equation 3] below. Here, drx-SlotOffset represents a delay before starting drx-onDurationTimer (1015). drx-SlotOffset can be set, for example, to time, the number of slots, etc.

[0217] [Mathematical Formula 3]

[0218]

[0219] Here, drx-ShortCycle and drx-StartOffset can be used to define the subframe to start the short DRX cycle. drx-ShortCycle and drx-StartOffset can be set, for example, as time, number of subframes, number of slots, etc.

[0220] Up to this point, the DRX operation has been described with reference to FIG. 10. According to one embodiment, the terminal can reduce the power consumption of the terminal by performing the DRX operation. However, even if the terminal performs the DRX operation, the terminal does not always receive the PDCCH associated with the terminal during the Active Time (1005). Therefore, in one embodiment of the present disclosure, a signal controlling the operation of the terminal can be provided to save the power of the terminal more efficiently.

[0221] In the following, we will specifically explain the carrier aggregation and scheduling methods in 5G communication systems.

[0222] The terminal can connect to a primary cell through initial connection, and the base station can additionally configure one or more secondary cells for the terminal. The terminal can perform communication through serving cells, including the primary cell and secondary cells configured by the base station.

[0223] The base station may additionally configure whether cross-carrier scheduling is enabled for the cells configured in the terminal. For the sake of convenience of explanation, when cross-carrier scheduling is enabled, the cell performing the scheduling (i.e., the cell receiving downlink control information corresponding to downlink allocation or uplink acknowledgment) is collectively referred to as the "First Cell," and the cell where scheduling is performed (i.e., the cell where downlink or uplink data is actually scheduled and transmitted / received based on downlink control information) is named the "Second Cell." If the terminal receives a cross-carrier scheduling setting from the base station for a specific cell A (Scheduled Cell) (in this case, Cell A corresponds to the "Second Cell"), the terminal may not perform PDCCH monitoring for Cell A at Cell A, but may perform it at another cell B designated for cross-carrier scheduling, i.e., the scheduling cell (in this case, Cell B corresponds to the "First Cell"). For the purpose of setting cross-carrier scheduling for a terminal, the base station may set information about the "first cell" that performs scheduling for the "second cell" (e.g., the cell index of the cell corresponding to the "first cell"), the Carrier Indicator Field (CIF) value for the "second cell," etc. For example, the setting information in [Table 14] below may be notified from the base station to the terminal through upper layer signaling (e.g., RRC signaling).

[0224] [Table 14]

[0225]

[0226] The terminal can monitor the PDCCH for a cell configured for cross-carrier scheduling in the cell corresponding to the "first cell." The terminal can determine the index of the cell scheduled by the received DCI from the Carrier Indicator field value within the DCI format that schedules data, and based on this, can transmit and receive data in the cell indicated by the Carrier Indicator.

[0227] Meanwhile, the cell being scheduled (Cell A) and the scheduling cell (Cell B) can be configured with different numerologies. Here, the numerology may include subcarrier spacing, cyclic prefixes, etc. If the numerologies of Cell A and Cell B are different, when Cell B's PDCCH schedules Cell A's PDSCH, a minimum scheduling offset as follows may be additionally considered between the PDCCH and PDSCH.

[0228] [Cross-Carrier Scheduling Method]

[0229] (1) Subcarrier spacing (μ) of cell B B ) is the subcarrier spacing (μ) of cell A A If it is less than ), the PDSCH can be scheduled starting from the next PDSCH slot corresponding to X symbols after the last symbol of the PDCCH received at Cell B. Here, X is μ B It may vary depending on, and μ B When =15kHz, X=4 symbols, μ B When =30kHz, X=4 symbols, μ B When =60kHz, X can be defined as 8 symbols.

[0230] (2) Subcarrier spacing of cell B (μ B ) is the subcarrier spacing (μ) of cell A AIf it is greater than ), the PDSCH can be scheduled starting from a point X symbols after the last symbol of the PDCCH received by Cell B. Here, X is μ B It may vary depending on, and μ B When =30kHz, X=4 symbols, μ B When =60kHz, X=8 symbols, μ B When =120kHz, X can be defined as 12 symbols.

[0231] In the following, we will specifically explain how to set the transmission configuration indication (TCI) state, which is a means for indicating or exchanging quasi co-location (QCL) information between a terminal and a base station in a 5G communication system.

[0232] A base station can set and indicate a TCI state between two different RSs or channels through appropriate signaling to indicate the QCL relationship between the different reference signals (RSs) or channels. Additionally, a base station can set and indicate a TCI state for a PDCCH (or PDCCH DMRS) through appropriate signaling. The TCI state is intended to announce the QCL relationship between the PDCCH (or PDCCH DMRS) and different RSs or channels, and saying that different RSs or channels are QCLed means that when estimating a channel through a reference RS antenna port A (reference RS #A) and another target RS antenna port B (target RS #B) that are in a QCL relationship, the terminal is allowed to apply some or all of the large-scale channel parameters estimated from antenna port A to the channel measurement from antenna port B. QCL may require associating different parameters depending on the situation, such as 1) time tracking affected by average delay and delay spread, 2) frequency tracking affected by Doppler shift and Doppler spread, 3) RRM (radio resource management) affected by average gain, and 4) BM (beam management) affected by spatial parameters. Accordingly, NR supports four types of QCL relationships as shown in [Table 15] below.

[0233] [Table 15]

[0234]

[0235] The above spatial RX parameter may collectively refer to some or all of various parameters, such as the angle of arrival (AoA), the power angular spectrum (PAS) of AoA, the angle of departure (AoD), the PAS of AoD, the transmit / receive channel correlation, the transmit / receive beamforming, and the spatial channel correlation.

[0236] The above QCL relationship can be established for the terminal through the RRC parameter TCI-State and QCL information as shown in [Table 16] below. Referring to [Table 16] below, the base station can establish one or more TCI states for the terminal and provide up to two QCL relationships (qcl-Type1, qcl-Type2) for the RS that references the ID of the TCI state, i.e., the target RS. At this time, each QCL information included in each TCI state includes the serving cell index and BWP index of the reference RS pointed to by the QCL information, the type and ID of the reference RS, and the QCL type as shown in [Table 15].

[0237] [Table 16]

[0238]

[0239] In the following, we will explain in detail the paging method in a 5G communication system.

[0240] FIG. 11 illustrates the process of paging in a wireless communication system according to various embodiments of the present disclosure.

[0241] Specifically, FIG. 11 is a diagram illustrating the paging procedure of a 5G communication system. The paging procedure can be used to notify when an incoming signal occurs to a terminal in an IDLE or INACTIVE state, to initiate network connection to the terminals, or to notify terminals in a CONNECTED state that system information has changed. Paging is controlled by a Mobility Management Entity (AMF), and paging messages can be transmitted across multiple cells within a Tracking Area (TA). Referring to FIG. 11, paging starts at the AMF (1103), passes through the base station (1102), and is transmitted to the terminal (1101). More specifically, paging starting from the AMF (1103) is transmitted to the base station (1102) via S1AP signaling (1104) and then to the terminal (1101) via RRC signaling (1106). At this time, the terminal (1101) can determine whether a paging message exists by monitoring the PDCCH (1105) set to P-RNTI during a paging occasion (1107). The paging occasions (1107a, 1107b, 1107c) can be determined based on the DRX period (1108a, 1108b) set by the base station to the terminal. A terminal that receives the PDCCH (1105) set to P-RNTI can receive a paging message (1106) from a PDSCH scheduled through the PDCCH (1105). The paging message (1106) may include terminal identifier (UE ID) information of the terminal that the base station intends to wake up.

[0242] An efficient paging procedure should allow the terminal (1101) to rest without performing reception operations for most of the time, and to wake up briefly only at set time intervals to observe paging information from the network. To this end, NR defines Paging Occasion (PO) and Paging Frame (PF). A PO can be defined as a subframe or time point where a PDCCH exists that is set as a P-RNTI for receiving paging messages. A PF can be defined as a radio frame containing one or more POs. According to the embodiment of FIG. 11, the terminal (1101) can observe one PO per Discontinuous Reception (DRX) period (1108a, 1108b).

[0243] FIG. 12 is a drawing for explaining a paging operation in a wireless communication system according to various embodiments of the present disclosure.

[0244] Specifically, FIG. 12 illustrates an example of paging in a 5G communication system. Referring to FIG. 12, when a terminal (1201) is in the RRC_IDLE state, the NR network determines the location of the terminal (1201) in units of Tracking Area (TA) (1206) rather than in units of cells. When connecting to the NR network, the terminal is assigned a Tracking Area Identity (TAI) list from Access and Mobility Management Function (AMF) (1205). Within the cells of the TAI list, the terminal (1201) can move freely without updating the AMF (805). When an incoming signal is received by the terminal (1201), the AMF (1205) transmits the same paging message to all cells (1202, 1203, 1204) within the TA (1206) currently set for the terminal (1201), and each cell (1202, 1203, 1204) transmits the paging message to the terminal (1201). When the terminal (1201) (re)selects a cell, it obtains the Tracking Area Code (TAC) of the cell through system information (e.g., SIB1) and can verify from this whether the cell is a cell within its TAI list. If the TAC of the selected cell is not in the TAI list, the terminal sends a Tracking Area Update (TAU) message to the AMF (1205). And when the AMF (1205) sends a response (TAU Accept) to the terminal, it also sends a TAI list so that the terminal can update the TAI list corresponding to the terminal's location change.

[0245] The following describes in detail the operation of monitoring the PDCCH for receiving paging on the terminal.

[0246] The terminal can monitor one paging occasion (PO) per DRX cycle. One PO may consist of a set of multiple PDCCH monitoring occasions, and a slot / resource in which a DCI for paging can be transmitted may consist of multiple time slots / resources (e.g., subframes or OFDM symbols). One paging frame (PF) corresponds to one radio frame and may include one or more POs or the start point of any PO.

[0247] In multi-beam operation, a terminal may assume that the same paging message or the same short message is repeated in all transmitting beams. In this case, the terminal's implementation may determine which beam to select to receive the paging message or short message. For RAN (Radio Access Network) initiated paging and CN (Core Network, CN) initiated paging, the paging message may be identical.

[0248] If the terminal receives RAN-driven paging, it can initiate the RRC Connection Resume procedure. If the terminal receives CN-driven paging while in the RRC_INACTIVE state, the terminal can change to RRC_IDLE mode and notify the Network Attached Storage (NAS) of this.

[0249] The paging frame (PF) and paging occasion (PO) for paging can be determined by the following mathematical formulas.

[0250] The System Frame Number (SFN) corresponding to the paging frame can be determined by the following [Equation 4]. In the following [Equation 4], A mod B may mean a modulo operation that outputs the remainder of dividing A by B.

[0251] [Mathematical Formula 4]

[0252]

[0253] The index (i_s) representing the paging opportunity (PO) can be determined by the following [Equation 5].

[0254] [Mathematical Formula 5]

[0255]

[0256] Each parameter of [Equation 4] and [Equation 5] for determining the aforementioned paging frame and paging opportunity can be defined as follows.

[0257] T: DRX cycle configured on the terminal (the DRX cycle can be configured by upper-layer signaling (e.g., RRC signaling, System Information Block (SIB)), etc.)

[0258] N: Total number of paging frames in T

[0259] Ns: Number of paging occasions for a single paging frame

[0260] PF_offset: Offset value to determine the starting point of the paging frame

[0261] UE_ID: A terminal ID for determining paging frames and paging opportunities, which can be determined as shown in [Equation 6] below.

[0262] [Mathematical Formula 6]

[0263]

[0264] The 5G-S-TMSI (5G S-Temporary Mobile Subscription Identifier) ​​is a temporary terminal identifier provided by the core network to uniquely identify a terminal within a Tracking Area (TA). The 5G-S-TMSI may be provided to the terminal, for example, through upper-layer signaling. If the terminal has not yet been registered with the network, the terminal may assume a UE_ID of 0. Alternatively, the terminal ID for paging may correspond to a parameter determined by the International Mobile Subscriber Identity (IMSI). In this disclosure, the terminal ID for paging is generalized and used as the UE_ID. Here, the UE_ID may include both a value that can be set based on the 5G-S-TMSI and a value that can be derived from the IMSI value.

[0265] The PDCCH (or PDCCH scrambled with P-RNTI) monitoring occasions for paging can be determined by the search space setting for paging (e.g., the search space indicated by the upper-level signaling parameter pagingSearchSpace), the setting for the first PDCCH monitoring occasion of the paging opportunity (e.g., the upper-level signaling parameter firstPDCCH-MonitoringOccasionOfPO), and the number of PDCCH monitoring occasions per SS / PBCH block (SSB) within the paging opportunity (e.g., the upper-level signaling parameter nrofPDCCH-MonitoringOccasionPerSSB-InPO). The definitions of pagingSearchSpace, firstPDCCH-MonitoringOccasionOfPO, and nrofPDCCH-MonitoringOccasionPerSSB-InPO may be specifically as shown in the following [Table 17].

[0266] [Table 17]

[0267]

[0268] If the paging search space is set to a search space with search space ID 0, when the number of paging occasions (Ns) for a paging frame is 1, there may be one paging opportunity within the paging frame, and when Ns is 2, there may be two paging opportunities within the paging frame, the first paging opportunity (i_s=0) may exist in the first half frame within the paging frame, and the second paging opportunity (i_s=1) may exist in the second half frame within the paging frame. Here, the search space with search space ID 0 may correspond to a search space set from the MIB (Master Information Block).

[0269] If the paging search space is set to a search space with a non-zero search space ID, the terminal can monitor the (i_s+1)th paging opportunity. A single paging opportunity may consist of a set of 'S * X' consecutive PDCCH monitoring opportunities, where 'S' may correspond to the number of actual transmitted SS / PBCH blocks (SSBs), and this information may be transmitted from the base station to the terminal as a specific parameter value (e.g., ssb-PositionsInBurst) of the System Information Block (SIB). Additionally, 'X' may correspond to the number of PDCCH monitoring opportunities per SS / PBCH block within the paging opportunity configured from the base station to the terminal (e.g., the upper layer signaling parameter nrofPDCCH-MonitoringOccasionPerSSB-InPO), and if such configuration information is unavailable, the terminal may assume X=1. The [x*S + K]th PDCCH monitoring opportunity within the paging opportunity (where x=0, 1, 2, ..., X-1 and K=1, 2, 3, ..., S) may correspond to the Kth transmitted SS / PBCH block. Starting with the first PDCCH monitoring opportunity within the paging frame, PDCCH monitoring opportunities that do not overlap with uplink (UL) symbols may be numbered sequentially starting from 0. In this case, if the firstPDCCH-MonitoringOccasionOfPO is set through upper layer signaling, the starting PDCCH monitoring opportunity number of the (i_s+1)th paging opportunity may correspond to the (i_s+1)th value within the firstPDCCH-MonitoringOccasionOfPO parameter.If firstPDCCH-MonitoringOccasionOfPO is not set via upper layer signaling, the starting PDCCH monitoring opportunity number of the (i_s+1)th paging opportunity may be the same as i_s * S * X. If X > 1, when a terminal detects a PDCCH corresponding to P-RNTI in a paging opportunity, the terminal does not need to monitor the remaining or subsequent PDCCH monitoring opportunities in that paging opportunity.

[0270] A single paging opportunity associated with a paging frame can start within that paging frame or after that paging frame.

[0271] PDCCH monitoring opportunities for any paging opportunity may exist across multiple radio frames. If the search space for paging is set to a search space where the search space ID is a value other than 0, PDCCH monitoring opportunities for a single paging opportunity may exist across multiple periods of the paging search space.

[0272] Referring to the TS 38.304 standard, discontinuous reception for paging is defined as shown in [Table 18a] and [Table 18b] below.

[0273] [Table 18a]

[0274]

[0275] [Table 18b]

[0276]

[0277] A base station may transmit a PDCCH for paging to a terminal, and the PDCCH may include scheduling information for a PDSCH containing a paging message. The paging message may include ID information of one or more terminals that the base station intends to wake up. More specifically, the paging message may include the information exemplified in [Table 19] below.

[0278] [Table 19]

[0279]

[0280] After receiving a PDCCH for paging from the base station, the terminal can receive a PDSCH scheduled by that PDCCH. Terminals identical to the UE_ID indicated in the paging message transmitted via the received PDSCH can wake up and perform subsequent operational procedures (e.g., random access, RRC connection, etc.).

[0281] In the following, the contents of the DCI format scrambled with P-RNTI in a 5G communication system will be described in detail. The DCI format scrambled with P-RNTI may consist of, for example, the following fields.

[0282] - Short Messages Indicator - 2 bits

[0283] - Short Message - 8 bits, according to Clause 6.5 of [9, TS38.331]. If only scheduling information for paging is transmitted, this field is reserved.

[0284] - Frequency Domain Resource Allocation Information - Bit, if only a short message is transmitted, this field is reserved. N DL,BWP RB is defined as the number of RBs in the downlink bandwidth part.

[0285] - Time domain resource allocation information - 4 bits. If only a short message is transmitted, this field is reserved.

[0286] - VRB-to-PRB mapping - 1 bit according to Table 7.3.1.2.2-5. If only a short message is transmitted, this field is reserved.

[0287] - Modulation and coding scheme - 5 bits. If only a short message is transmitted, this field is reserved.

[0288] - TB scaling - 2 bits as defined in Clause 5.1.3.2 of [6, TS38.214]. If only short messages are transmitted, this field is reserved.

[0289] - Reserved bits - 8 bits for operation in a cell with shared spectrum channel access; 6 bits in other cases

[0290] [Table 20]

[0291]

[0292] [Table 20] shows short message indicators in the DCI format scrambled with P-RNTI.

[0293] Referring to [Table 20], the short message indicator indicates that if the bit field is 00, it is reserved; if the bit field is 01, only scheduling information for paging is present in the DCI; if the bit field is 10, only short message is present in the DCI; and if the bit field is 11, both scheduling information for paging and short message are present in the DCI.

[0294] The method for setting the TCI state for the PDCCH (or PDCCH DMRS) in a 5G communication system is the same as described in [Table 15] and [Table 16] above.

[0295] FIG. 13 illustrates base station beam allocation according to TCI state setting in a wireless communication system according to various embodiments of the present disclosure.

[0296] Specifically, FIG. 13 illustrates an example of base station beam allocation according to TCI state settings. Referring to FIG. 13, the base station can transmit information about N different beams to the terminal through N different TCI states. For example, when N=3 as in FIG. 13, the base station can notify that antenna ports referencing the different TCI states (1300, 1305, 1310) are associated with different spatial Rx parameters, i.e., different beams, by setting the qcl-Type2 parameters (see [Table 16]) included in the three TCI states (1300, 1305, 1310) to be associated with CSI-RS or SSB corresponding to different beams and set to QCL type D. Specifically, the combinations of TCI states applicable to the PDCCH DMRS antenna port are as shown in [Table 21] below. In [Table 21], the 4th row represents the combinations assumed by the terminal before RRC setup, and setup after RRC is not possible.

[0297] [Table 21]

[0298]

[0299] FIG. 14 illustrates the process of hierarchical signaling in a wireless communication system according to various embodiments of the present disclosure.

[0300] An embodiment of the present disclosure supports a hierarchical signaling method as illustrated in FIG. 14 for dynamic allocation of a PDCCH beam. Referring to FIG. 14, a base station may set N TCI states (1405, 1410, 1415, ..., 1420) to a terminal through RRC signaling (1400), and may set some of these as TCI states for CORESET (1425). Subsequently, the base station may instruct the terminal to one of the TCI states for CORESET (1430, 1435, ..., 1440) through MAC CE signaling (1445). Subsequently, the terminal may receive DCI from the PDCCH based on beam information containing the TCI state indicated by the MAC CE signaling.

[0301] FIG. 15 illustrates an example of a signaling structure in a wireless communication system according to various embodiments of the present disclosure.

[0302] Specifically, FIG. 15 is a diagram illustrating a TCI indication MAC CE signaling structure for PDCCH DMRS. Referring to FIG. 15, the TCI indication MAC CE signaling for PDCCH DMRS consists of 2 bytes (16 bits) and includes a 1-bit reserved bit (1510), a 5-bit serving cell ID (1515), a 2-bit BWP ID (1520), a 2-bit CORESET ID (1525), and a 6-bit TCI state ID (1530).

[0303] The base station may set one or more TCI states for a specific CORESET for the terminal, and may activate one of the set TCI states through the TCI instruction MAC CE activation command. For example, if {TCI state#0, TCI state#1, TCI state#2} are set as TCI states for CORESET #1, the base station may transmit a command to the terminal via the TCI instruction MAC CE to activate TCI state#0 as the TCI state for CORESET #1. Based on the activation command for the TCI state received via the TCI instruction MAC CE, the terminal can correctly receive the DMRS of the corresponding CORESET based on the QCL information within the activated TCI state.

[0304] If the terminal has not been provided with a TCI state setting indicating QCL information for a DMRS antenna port for receiving a PDCCH of a control resource set configured as an MIB (or a control resource set with a control resource set ID (or index) of 0 or a specification resource set #0), the terminal may assume that the following physical layer channels are QCL in terms of Average Gain, QCL-Type A, and QCL-Type D characteristics.

[0305] - DMRS (or DMRS antenna port) associated with the PDCCH receiving the control resource set configured in the MIB (or the control resource set with control resource set ID 0 or specification resource set #0)

[0306] - DMRS antenna port associated with receiving the corresponding PDSCH (or the PDSCH scheduled by the PDCCH transmitted to Control Resource Set #0).

[0307] - The corresponding SS / PBCH block (or the SS / PBCH block associated with Control Resource Set #0, or the SS / PBCH block transmitting the MIB that sets up the corresponding Control Resource Set #0)

[0308] A part of the TS 38.213 standard related to the above content is as shown in [Table 22] below.

[0309] [Table 22]

[0310]

[0311] If the terminal is configured with a search space ID of 0 for a common search space set for monitoring SI-RNTI / P-RNTI (or if the common search space set for monitoring SI-RNTI / P-RNTI is a search space set configured as MIB or search space #0), the terminal may monitor PDCCH at a monitoring occasion associated with SS / PBCH block A, wherein SS / PBCH block A may be determined as follows.

[0312] - The terminal may receive a command to activate a specific TCI state for control area #0 via the above TCI instruction MAC CE, wherein the TCI state may include a CSI-RS associated with any SS / PBCH. The SS / PBCH associated with the CSI-RS of the TCI state activated via the most recently received TCI instruction MAC CE may correspond to SS / PBCH block A.

[0313] - When performing random access, the terminal may transmit a preamble (or PRACH (Physiacl Random Access Channel)) associated with a specific SS / PBCH to the base station. The SS / PBCH identified by the terminal through the most recently performed random access procedure may correspond to SS / PBCH Block A.

[0314] A part of the TS 38.213 standard related to the above content is as shown in [Table 23] below.

[0315] [Table 23]

[0316]

[0317] For a control resource set (control resource set #X) where the index is set to a value other than 0,

[0318] - If the terminal has not received a TCI state for Control Resource Set #X, or has received one or more TCI states but has not received a TCI instruction MAC CE activation command to activate one of them, it can be assumed that the terminal has QCL with the SS / PBCH block identified during the initial connection process for the DMRS transmitted from Control Resource Set #X.

[0319] - If a terminal receives a configuration for one or more TCI states as part of a handover procedure (or part of a Reconfiguration with synch procedure), but does not receive a TCI instruction MAC CE enable command to activate one of them, it can be assumed that the terminal is QCL with the identified SS / PBCH or CSI-RS resource during the random access procedure initiated as a handover procedure (or Reconfiguration with synch procedure) for the DMRS transmitted from control resource set #X.

[0320] A part of the TS 38.213 standard related to the above content is as shown in [Table 24] below.

[0321] [Table 24]

[0322]

[0323] For a control resource set with index 0 (control resource set #0), the terminal can assume that the DMRS antenna port of the PDCCH receiving with control resource set #0 is QCL with the following physical resources.

[0324] - Downlink reference signal included in the TCI state activated by the TCI instruction MAC CE enable command or

[0325] - If the terminal has not received a TCI instruction MAC CE enable command for the TCI state, the SS / PBCH block identified by the terminal through the most recent random access procedure (provided that it is a random access that is not a contention-based random access triggered by a PDCCH order).

[0326] A part of the aforementioned TS 38.213 standard is as shown in [Table 25] below.

[0327] [Table 25]

[0328]

[0329] With reference to the drawings below, a time domain resource allocation method for a data channel in a next-generation mobile communication system (5G or NR system) according to various embodiments of the present disclosure will be described.

[0330] FIG. 16 is a diagram illustrating an example of a time domain resource allocation method for a data channel in a wireless communication system according to an embodiment of the present disclosure.

[0331] The base station may set a table for Time Domain Resource Allocation (TDRA) information for the downlink data channel PDSCH and / or the uplink data channel PUSCH for the terminal via upper layer signaling (e.g., SIB, RRC signaling) or L1 signaling (e.g., DCI). For PDSCH, a table consisting of a maximum of maxNrofDL-Allocations = 16 entries may be set, and for PUSCH, a table consisting of a maximum of maxNrofUL-Allocations = 16 entries may be set. The above time domain resource allocation information may include, for example, PDCCH-to-PDSCH slot timing (corresponding to a slot-unit time interval between the time when the PDCCH is received and the time when the PDSCH scheduled by the received PDCCH is transmitted, denoted as K0) or PDCCH-to-PUSCH slot timing (corresponding to a slot-unit time interval between the time when the PDCCH is received and the time when the PUSCH scheduled by the received PDCCH is transmitted, denoted as K2), information regarding the position (S) of the starting symbol where the PDSCH or PUSCH is scheduled within the slot and the length (L) of the scheduled symbol(s), and the mapping type of the PDSCH or PUSCH. For example, the information referenced in [Table 7] to [Table 9] above may be notified from the base station to the terminal in a manner similar to at least one of [Table 26] to [Table 34] exemplified below.

[0332] According to one embodiment of the present disclosure, a base station may notify a terminal of one of the entries in a table for time domain resource allocation information via L1 signaling (e.g., DCI) or upper layer signaling (e.g., RRC signaling). For example, when notifying via DCI, the entry may be indicated by the 'time domain resource allocation' field within the DCI. The terminal may obtain time domain resource allocation information for PDSCH or PUSCH based on the RRC signaling or DCI received from the base station. For convenience, the following embodiments describe an example in which time domain resource allocation information is transmitted via DCI.

[0333] If an entry with the above-mentioned K0 and / or K2 values ​​of 0 is indicated, this may mean that the PDCCH and the data channel are scheduled in the same slot. Let us call this "Self-slot scheduling".

[0334] If an entry is indicated where the above-mentioned K0 and / or K2 values ​​are greater than 0, this may mean that the PDCCH and the data channel are scheduled in different slots. Hereinafter, this will be referred to as "Cross-slot scheduling".

[0335] Referring to FIG. 16, an example is shown where PDSCH (1601) scheduled by PDCCH (1600) is scheduled in the same slot (slot 0 (1604)) as PDCCH (1600). This case corresponds to the case where K0, which corresponds to the PDCCH-to-PDSCH scheduling offset value, is indicated as K0=0 (1610), and thus corresponds to self-slot scheduling.

[0336] As another example, FIG. 16 shows an example where PDSCH (1603) scheduled by PDCCH (1602) is scheduled after the slot in which PDCCH (1602) was transmitted. It shows that PDCCH (1602) is transmitted in slot 2 (1606) among slots (1604–1608), and PDSCH (1603) scheduled by PDCCH (1602) is transmitted in slot 4 (1608). This case corresponds to the case where K0, which corresponds to the PDCCH-to-PDSCH scheduling offset value, is indicated as K0=2 (1611), and thus corresponds to the cross-slot scheduling.

[0337] In a wireless communication system to which the present disclosure applies, cross-slot scheduling may be utilized for the purpose of reducing power consumption of a terminal. When cross-slot scheduling is supported, the terminal may operate in a sleep mode between the time of receiving the PDCCH and the time when transmission and reception of the data channel occur, thereby reducing the power consumption of the terminal. Additionally, when cross-slot scheduling is supported, the terminal may extend the processing time for the PDCCH compared to self-slot scheduling, and thereby reduce power consumption by increasing the computation speed. Furthermore, the terminal may finally obtain time domain scheduling information, such as time domain resource allocation (TDRA) information for the PDCCH, after receiving the PDCCH and completing decoding. Therefore, during the time interval for receiving and decoding the PDSCH, the terminal cannot know whether the PDSCH is scheduled, so it must perform buffering for OFDM symbols for which the PDSCH can be scheduled, which can significantly increase the power consumption of the terminal. If the terminal can know the time domain resource allocation information for the PDSCH in advance before decoding the PDSCH—that is, if it can know in advance that cross-slot scheduling will occur—the terminal can minimize buffering for unnecessary PDSCHs and thus reduce power consumption.

[0338] To reduce power consumption of the terminal, the base station may instruct the terminal, via upper layer signaling or L1 signaling, to use minimum values ​​of K0 and / or K2 for scheduling on data channels. The terminal can expect that scheduling will always be performed with K0 and / or K2 values ​​that are greater than or equal to the minimum values ​​of K0 and / or K2 received from the base station. For convenience of explanation, the minimum values ​​of K0 and / or K2 instructed by the base station to the terminal shall be referred to as the minimum scheduling offset (hereinafter, "minimum offset").

[0339] The terminal may be instructed by the base station to a minimum offset value via a DCI that schedules PDSCH or PUSCH (e.g., DCI format 1_1 or DCI format 0_1) or a non-scheduled DCI (e.g., a new DCI format defined for power reduction purposes or a new RNTI defined for power reduction purposes or DCI format 2_0 or DCI format 2_1, etc.). The terminal may be instructed by the base station to a minimum offset value for K0 (K0 min Minimum offset value for ) and K2 (K2 min For ), receive them separately with different values, or the minimum offset value (K) for K0 and K2 min You can receive a single value with ).

[0340] In some embodiments of the present disclosure, the terminal receives from a base station a minimum offset value (K0) for K0. min Minimum offset value for ) and K2 (K2 min Regarding ), different values ​​can be received separately. That is, the terminal is K0 min and K2 min Each can receive a set of candidate values ​​for . The terminal K0 in DL DCI format (e.g., DCI format 1_1). min You can be instructed to do so, and K2 in UL DCI format (e.g., DCI format 0_1). min Can receive instructions. The terminal receives K0 min and K2 min Regarding the application delay time for , different application delay time #0 and application delay time #2 can be assumed, respectively. In this case, the terminal can relax the PDCCH processing time only within application delay time #0, and cannot relax the PDCCH processing time within application delay time #2. Or the terminal receives K0 min and K2 minRegarding the application delay time for , a single application delay time can be assumed, where the application delay time is K0 min It can be determined as a function for.

[0341] In some embodiments of the present disclosure, the terminal receives from a base station a minimum offset value (K) for K0 and K2. min A single value can be received as ). The terminal has K to be applied commonly to K0 and K2. min A set of candidate values ​​for can be set. The terminal can be instructed to Kmin in DL DCI format (e.g., DCI format 1_1) or / and UL DCI format (e.g., DCI format 0_1).

[0342] In some embodiments of the present disclosure, the terminal may receive, through upper layer signaling, whether to receive minimum offset values ​​for K0 and K2 separately from the base station or to receive them as a single value.

[0343] In the present disclosure below, one minimum offset value K min Describe assuming the case where this is indicated, K0 min and K2 min Even if each of these is indicated separately, the contents of the present disclosure may apply in the same way.

[0344] According to one embodiment of the present disclosure, a terminal can expect that scheduling will be performed only on entries among the pre-configured time domain resource allocation table values ​​where the K0 and / or K2 values ​​(hereinafter K0 / K2) are greater than or equal to the indicated minimum offset, based on a minimum offset received from a base station. For example, let us assume a case where a base station has configured a time domain resource allocation table for the following PDSCH in the terminal.

[0345] [Table 26]

[0346]

[0347] If the base station is instructed to the terminal that the minimum offset value is 3, the terminal can expect that PDSCH will not be scheduled for entries where the K0 value is less than 3, i.e., entry indices 1, 2, 3, 4, 5, and 6, and that it will be scheduled for the remaining entries, i.e., entry indices 7, 8, ..., 16. For the convenience of explanation, the following terms are defined.

[0348] - Valid entry: An entry among the pre-configured time domain resource allocation table values ​​where the K0 / K2 value is greater than or equal to the received minimum offset, and which can be used for scheduling.

[0349] - Invalid entry: An entry among the pre-configured time domain resource allocation table values ​​where the K0 / K2 value is smaller than the received minimum offset, and which cannot be used for scheduling.

[0350] According to one embodiment of the present disclosure, a terminal receives candidate values ​​for N minimum offset values, e.g., K, through upper layer signaling from a base station. min (0), K min (1), ..., K min (N-1) can be set, and one of the N minimum offset values ​​set via L1 signaling can be specified. For example, two minimum offset values ​​are K min (0)=2, K min (1) can be set to 4, and K to the terminal through a 1-bit indicator of L1 signaling (e.g., DCI, DCI format 0_1 / 1_1, etc.). -min (0) or K min (1) One of the following can be indicated. For example, if the 1-bit indicator is "0", K -min Indicates (0), and if the 1-bit indicator is "1", K min(1) can be indicated. As another example, one of the candidate values ​​for a plurality of minimum offset values ​​can be indicated to the terminal through an n-bit indicator. As yet another example, one minimum offset value K min (1)=4 can be set, and in this case K min (0) = 0 or K min (0) can be considered an operation that does not consider any restrictions on the time domain resource allocation table (i.e., assumes all entries in the pre-configured time domain resource allocation table are valid entries), in which case the base station sends K to the terminal via a 1-bit indicator of L1 signaling (e.g., DCI, DCI format 0_1 / 1_1, etc.) to the terminal. -min (0) or K min (1) You can indicate one of them.

[0351] According to one embodiment of the present disclosure, a terminal may receive a minimum offset value through a DCI transmitted from a base station at a specific point in time, and may apply the received minimum offset value from a specific point in time after the time at which the minimum offset value was received. For example, the terminal may be instructed to receive a minimum offset value through a DCI received via a PDCCH transmitted from a base station at time T0, and for a certain period of time (T delay A point in time (T) after ) app The content of the newly acquired minimum offset value from ) can be applied. In this case, T app is T0 and T delay It can be expressed as a function of . If the terminal receives a DCI from the base station indicating a minimum offset value at time T0, the terminal [receives] the indicated minimum offset value T appIt may not have been expected to be applied previously. Here, applying the minimum offset value may refer to an action of determining the entries in the time domain resource allocation table configured for upper-layer signaling as valid or invalid entries based on the minimum offset value received by the terminal, and applying them.

[0352] The following describes the default time domain resource allocation table. A terminal may obtain scheduling information based on a predefined default time domain resource allocation table for a data channel scheduled by a DCI format scrambled with a specific RNTI, when the terminal has not received a time domain resource allocation table through upper-layer signaling. In this case, one or more predefined default time domain resource allocation tables may exist. For example, in 5G NR, default time domain resource allocation table A, default time domain resource allocation table B, and default time domain resource allocation table C are defined, and default time domain resource allocation table A may have two tables defined according to a cyclic prefix (CP) or an extended CP. More specifically, default domain resource allocation tables A, B, and C as shown in [Table 27] to [Table 30] below may be defined.

[0353] [Table 27]

[0354]

[0355] [Table 28]

[0356]

[0357] [Table 29]

[0358]

[0359] [Table 30]

[0360]

[0361] Based on the aforementioned basic time domain resource allocation table, the terminal can obtain scheduling information for a data channel. Based on information such as RNTI, search space type, and multiplexing pattern between SS / PBCH and CORESET, the terminal can consider one basic time domain resource allocation table among multiple basic time domain resource allocation tables and obtain scheduling information for a data channel. For example, regarding a PDSCH scheduled by a DCI format scrambled with a P-RNTI that schedules paging messages, the terminal may selectively use different basic time domain resource allocation tables according to the multiplexing pattern between an SS / PBCH block (SSB) and a CORESET (e.g., CORESET#0 or a CORESET with a CORESET index of 0). Here, the multiplexing pattern between the SS / PBCH and CORESET may have multiple patterns according to, for example, Time Domain Multiplexing (TDM) and Frequency Domain Multiplexing (FDM) methods. For example, 5G NR defines multiplexing pattern 1 of the TDM method between SS / PBCH and CORESET, and defines multiplexing patterns 2 and 3 of the FDM method between SS / PBCH and CORESET. When the terminal is in multiplexing pattern 1 between SS / PBCH and CORESET, it can consider a basic time domain resource allocation table A for PDSCH scheduled by a DCI format scrambled with P-RNTI; when the terminal is in multiplexing pattern 2 between SS / PBCH and CORESET, it can consider a basic time domain resource allocation table B for PDSCH scheduled by a DCI format scrambled with P-RNTI; and when the terminal is in multiplexing pattern 3 between SS / PBCH and CORESET, it can consider a basic time domain resource allocation table C for PDSCH scheduled by a DCI format scrambled with P-RNTI.For example, based on [Table 31] below, a basic time domain resource allocation table can be determined according to RNTI, search space type, multiplexing pattern between SS / PBCH and CORESET, etc.

[0362] [Table 31]

[0363]

[0364] According to the description above, a terminal in an IDLE / INACTIVE state can obtain scheduling information for a PDSCH in which a paging message is transmitted via a DCI format scrambled with P-RNTI, and at this time, the terminal can assume a default time domain resource allocation table. At this time, since the default time domain resource allocation table supports only self-slot scheduling (where the K0 value of all entries is 0) or the minimum value of the slot offset value within the default time domain resource allocation table is 0, the terminal can expect self-slot scheduling for the data channel scheduled by the corresponding DCI. Accordingly, the terminal needs to perform buffering in advance for symbols for which the data channel can be scheduled in the slot in which the PDCCH was received, and this may increase the power consumption of the terminal.

[0365] In order to reduce the power consumption of an IDLE / INACTIVE mode terminal, the present disclosure proposes a method that supports cross-slot scheduling for data transmission and reception (e.g., transmission and reception of paging messages) in IDLE / INACTIVE mode. Through the present disclosure, the terminal can more effectively reduce power consumption in IDLE / INACTIVE mode.

[0366] In the following, terms such as paging PDCCH, PDCCH for paging, PDCCH corresponding to paging, PDCCH scrambled with P-RNTI, and PDCCH set with P-RNTI may all be used with the same meaning. Additionally, in the aforementioned paging-related PDCCH, PDCCH may be used with the same meaning as DCI.

[0367] In the following, terms such as paging PDSCH, PDSCH for paging, PDSCH to which paging messages are transmitted, PDSCH scrambled with P-RNTI, and PDSCH configured with P-RNTI may all be used interchangeably.

[0368] Hereinafter, the IDLE or INACTIVE state will be collectively referred to as IDLE mode, and the CONNECTED state will be referred to as CONNECTED mode.

[0369] In the following, the term "upper layer signaling" may refer to a signaling corresponding to at least one or a combination of at least one of the following signalings.

[0370] - MIB (Master Information Block)

[0371] - SIB (System Information Block) or SIB

[0372] - RRC (Radio Resource Control)

[0373] - MAC (Medium Access Control) CE (Control Element)

[0374] - UE Capability Reporting

[0375] - Terminal assistance information or message (UE assistance information message)

[0376] Additionally, L1 signaling may be a signaling corresponding to at least one or a combination of at least one of the following physical layer channels or signaling methods.

[0377] - PDCCH (Physical Downlink Control Channel)

[0378] - DCI (Downlink Control Information)

[0379] - Terminal-specific (UE-specific) DCI

[0380] - Group common DCI

[0381] - Common DCI

[0382] - Scheduling DCI (e.g., DCI used for the purpose of scheduling downlink or uplink data)

[0383] - Non-scheduling DCI (e.g., DCI not intended for scheduling downlink or uplink data)

[0384] - PUCCH (Physical Uplink Control Channel)

[0385] - UCI (Uplink Control Information)

[0386] In the following, the definitions of each mathematical operator are as follows.

[0387] floor(X): A function that outputs the largest integer smaller than X.

[0388] ceil(X): A function that outputs the smallest integer greater than X.

[0389] A mod B: A function that outputs the remainder when A is divided by B (modulo operator)

[0390] max(X,Y): A function that outputs the larger of X and Y

[0391] min(X,Y): A function that outputs the smaller of X and Y

[0392] Cross-slot scheduling methods according to the first to fourth embodiments of the present disclosure will be described below. In the first to fourth embodiments below, the cross-slot scheduling methods are exemplified in relation to paging, but the cross-slot scheduling methods according to the present disclosure are not limited thereto and can be applied in the same or similar manner to receiving SIB, receiving RMSI, receiving RRC information, or receiving PDSCH in a connection state. Therefore, it should be noted that the embodiments of the present disclosure are not limited to cross-slot scheduling for paging.

[0393] In the first embodiment of the present disclosure, a method is proposed to support cross-slot scheduling for paging messages to reduce power consumption of a terminal.

[0394] In one embodiment of the present disclosure, the base station may provide the terminal with information regarding a “minimum offset,” which is the minimum value of the slot offset value to which the paging PDSCH can be scheduled, so that cross-slot scheduling can be guaranteed for the terminal regarding the PDSCH containing the paging message. The terminal may determine scheduling information for the paging PDSCH based on the acquired “minimum offset (K0min)” value. For example, in this embodiment, the terminal may expect that the slot offset value of the paging PDSCH (e.g., may correspond to the K0 value) will be scheduled to be equal to or greater than the “minimum offset (K0min)” value.

[0395] In the first embodiment of the present disclosure, various embodiments are proposed for a method of transmitting a minimum offset value for a paging PDSCH to a terminal, a method of the terminal obtaining information about the minimum offset value, or a method of applying the minimum offset value, as exemplified below in [Method 1] to [Method 7].

[0396] [Method 1]

[0397] In one embodiment of the present disclosure, a base station may set a minimum offset value for a terminal through upper layer signaling (e.g., MIB or SIB or RRC information).

[0398] [Method 2]

[0399] In one embodiment of the present disclosure, a base station may instruct a terminal to a minimum offset value via L1 signaling (e.g., paging PDCCH, DCI format scrambled with P-RNTI, etc.).

[0400] [Method 3]

[0401] In one embodiment of the present disclosure, a base station may set a minimum offset value to a terminal through upper layer signaling (e.g., MIB, SIB, or RRC information, etc.), and whether to apply the minimum offset value may be additionally indicated through upper layer signaling (e.g., MIB, SIB, or RRC information) or L1 signaling (e.g., paging PDCCH, DCI format scrambled with P-RNTI, etc.). That is, the terminal receives information regarding the minimum offset value, and after receiving setting information or instruction information instructing to apply the minimum offset value, can determine paging PDSCH scheduling information based on the minimum offset value.

[0402] [Method 4]

[0403] In one embodiment of the present disclosure, a base station may set a minimum offset value to a terminal through upper layer signaling (e.g., MIB, SIB, or RRC information, etc.), and whether the minimum offset value is applied (e.g., a 1-bit indicator indicating whether the minimum offset value is applied) may be implicitly determined by other system parameters (e.g., configuration information related to paging monitoring). For example, the base station may set the minimum offset value to K0min = X through upper layer signaling to the terminal. If the terminal satisfies a specific [Condition A] for paging monitoring, it may determine scheduling information for the paging PDSCH based on the received minimum offset value K0min = X. The specific [Condition A] for paging monitoring may correspond, for example, to the case where at least one of conditions a) to c) below is satisfied.

[0404] [Condition A]

[0405] a) This may apply when the control resource set for monitoring the paging PDCCH is set to a "second control resource set." The "second control resource set" may apply, for example, when the terminal is configured with a control resource set #X other than control resource set #0 (or a control resource set configured as MIB) as the control resource set for monitoring the paging PDCCH. Another example may apply when the terminal is configured with a specific control resource set #X defined for the purpose of reducing the terminal's power consumption (or defined in 3GPP specifications for paging monitoring of terminals after a specific Release) as the control resource set for monitoring the paging PDCCH (in this case, control resource set #X may be configured as SIB1). Yet another example may apply when the terminal is configured with a different SIB Y (Y≠1) other than SIB1 as the control resource set #X for monitoring the paging PDCCH.

[0406] b) This may apply when the search space set for monitoring the paging PDCCH is configured as a "second search space set." For example, the "second search space set" may apply when the terminal is configured with a search space set #X other than search space set #0 (or a search space set configured as an MIB) as the search space set for monitoring the paging PDCCH. Another example may apply when the terminal is configured with a specific search space set #X defined for the purpose of reducing the terminal's power consumption (or defined for paging monitoring of terminals after a specific Release) as the search space set for monitoring the paging PDCCH (in this case, search space set #X may be configured as SIB1). Yet another example may apply when the terminal is configured with a SIB Y other than SIB1 (Y≠1) as the search space set #X for monitoring the paging PDCCH.

[0407] c) When monitoring a DCI format scrambled with a different P-RNTI (P-RNTI#2, P-RNTI#3, ..., P-RNTI#M) other than the existing P-RNTI, if multiple P-RNTIs exist, e.g., P-RNTI, P-RNTI#2, P-RNTI#3, ..., P-RNTI#M

[0408] [Method 5]

[0409] In one embodiment of the present disclosure, the minimum offset value may be predefined or implicitly determined by other system parameters, and whether the minimum offset value is applied (e.g., a 1-bit indicator indicating whether the minimum offset value is applied) may be notified from the base station to the terminal through upper layer signaling (e.g., MIB, SIB, or RRC information) or L1 signaling (e.g., paging PDSCH, DCI format scrambled with P-RNTI). For example, the minimum offset value may be predefined as K0min=X (e.g., X=1), and whether scheduling information for the paging PDSCH is determined by considering the K0min value may be additionally notified to the terminal through upper layer signaling or L1 signaling. In this case, the predefined minimum offset value may be defined as different values ​​depending on the subcarrier spacing. For example, K0min can be defined as A for a subcarrier interval of 15 kHz, K0min as B for a subcarrier interval of 30 kHz, K0min as C for a subcarrier interval of 60 kHz, and K0min as D for a subcarrier interval of 120 kHz.

[0410] [Method 6]

[0411] In one embodiment of the present disclosure, the minimum offset value may be predefined or implicitly determined by other system parameters, and whether the minimum offset value is applied (e.g., a 1-bit indicator indicating whether the minimum offset value is applied) may be implicitly determined by other system parameters (e.g., configuration information related to paging monitoring). For example, the minimum offset value may be predefined as K0min=X (e.g., X=1), and whether scheduling information for the paging PDSCH is determined by considering the K0min value may be additionally notified to the terminal through upper layer signaling or L1 signaling. In this case, the predefined minimum offset value may be defined as different values ​​depending on the subcarrier interval. For example, it may be defined as K0min = A for a subcarrier interval of 15 kHz, K0min = B for a subcarrier interval of 30 kHz, K0min = C for a subcarrier interval of 60 kHz, and K0min = D for a subcarrier interval of 120 kHz, respectively. A terminal that knows information about the minimum offset value can determine scheduling information for the paging PDSCH based on the minimum offset value K0min=X when the above specific [condition A] for paging monitoring is satisfied. The above specific [condition A] may correspond to the condition described in the above-mentioned method 4.

[0412] [Method 7]

[0413] In one embodiment of the present disclosure, a base station may set a minimum offset value to a terminal through upper layer signaling (e.g., MIB, SIB, or RRC information, etc.), and whether to apply the minimum offset value (e.g., a 1-bit indicator indicating whether to apply the minimum offset value) may be additionally set through upper layer signaling or L1 signaling. The terminal may control the monitoring operation for the paging PDCCH according to the instructions regarding whether to apply the minimum offset value. For example, if the terminal receives setting information instructing to apply the minimum offset value, it may monitor the paging PDCCH in the aforementioned "second control resource set" or "second search space set," and if the terminal receives setting information instructing not to apply the minimum offset value, the terminal may monitor the paging PDCCH in the conventional control resource set and search space set (e.g., a control resource set and search space set that can be set to MIB or SIB1).

[0414] The above-described methods 1, 2, 3, 4, 5, 6, and 7 may be implemented individually or at least one of the methods may be combined. As another embodiment, it is also possible to selectively apply at least one of the above-described methods depending on the state of the terminal (connected state, idle state, or inactive state), the performance of the terminal, or the 3GPP standard release supported by the terminal.

[0415] According to the method described above, paging messages can be effectively transmitted in a network where existing terminals (or terminals prior to a specific Release, or legacy terminals, or terminals that do not support paging operations based on cross-slot scheduling) and new terminals (or terminals after a specific Release, or new terminals, or terminals that support paging operations based on cross-slot scheduling) coexist. That is, the base station can still transmit paging PDSCH to existing terminals based on a conventional scheduling method (or paging PDSCH scheduling based on self-slot scheduling, or paging PDSCH scheduling based on a basic time domain resource allocation table), and can transmit paging PDSCH based on the cross-slot scheduling method described above to new terminals. Likewise, existing terminals can still receive paging PDSCH based on the conventional scheduling method, and new terminals can obtain a power consumption reduction benefit by receiving paging PDSCH based on the aforementioned cross-slot scheduling method.

[0416] In the second embodiment of the present disclosure, a specific embodiment is proposed in which a terminal obtains information regarding a minimum offset value for a paging PDSCH and then determines scheduling information for a paging PDSCH based on the obtained minimum offset value.

[0417] In the present disclosure, the terminal can obtain information regarding the minimum offset value for the paging PDSCH by using at least one of the various methods exemplified in the first embodiment described above.

[0418] In addition, as described in [Table 31] above, an idle mode terminal in an idle state can obtain time domain resource allocation information for the P-RNTI (i.e., scheduling information for the paging PDSCH) based on a basic time domain resource allocation table (i.e., basic time domain resource allocation table A, B, or C exemplified in [Tables 27] to [Table 30]). A terminal that has obtained a minimum offset value can determine a slot offset value based on the information of the obtained minimum offset value in a method of interpreting the contents of the time domain resource allocation field indicated by the DCI format scrambled by the P-RNTI scheduling the paging PDSCH. For example, a slot offset value for the paging PDSCH can be determined based on a method corresponding to at least one of [Method 8] to [Method 11] below or a combination thereof.

[0419] [Method 8]

[0420] According to one embodiment of the present disclosure, the terminal can expect that, based on the acquired minimum offset value, scheduling will be performed only on the entries in the basic time domain resource allocation table defined for paging scheduling (or likewise for P-RNTI) where the slot offset value (K0) is greater than or equal to the acquired minimum offset value.

[0421] In the case of Method 8 above, depending on the slot offset values ​​defined in the base time domain table, there may be instances where all entries are smaller than the minimum offset value, which may result in a situation where scheduling is impossible. Accordingly, the following methods may be considered.

[0422] [Method 9]

[0423] According to one embodiment of the present disclosure, the terminal may reinterpret the slot offset (K0) value defined in the basic time domain resource allocation table defined for paging scheduling (or likewise for P-RNTI) based on the acquired minimum offset value. For example, among the values ​​in the basic time domain resource allocation table, values ​​where the slot offset (K0) value is smaller than the minimum offset (K0min) value may be reinterpreted by changing them to the corresponding minimum offset (K0min) value. In other words, the terminal may reinterpret the K0 value in the basic time domain resource allocation table as K0', and the K0' value may be defined as follows.

[0424] K0' = min(K0, K0min)

[0425] For example, regarding the basic time domain resource allocation table of [Table 29] above, if the terminal is notified that K0min=1, the terminal can reinterpret the slot offset values ​​of the corresponding basic time domain resource allocation table as the K0' values ​​in [Table 32] below. The K0 values ​​within the basic time domain resource allocation tables exemplified in [Table 27], [Table 28], and [Table 30] above can also be reinterpreted in the same way.

[0426] [Table 32]

[0427]

[0428] [Method 10]

[0429] According to one embodiment of the present disclosure, the terminal may reinterpret the slot offset (K0) value defined in the basic time domain resource allocation table defined for paging scheduling (or likewise for P-RNTI) based on the acquired minimum offset value. For example, the slot offset (K0) value of the basic time domain resource allocation table may be reinterpreted by adding a minimum offset (K0min) to change it to a minimum offset (K0min) value. In other words, the terminal may reinterpret the K0 value in the basic time domain resource allocation table as K0', and the K0' value may be defined as follows.

[0430] K0' = K0 + K0min

[0431] For example, regarding the basic time domain resource allocation table of [Table 29] above, if the terminal is notified that K0min=1, the terminal can reinterpret the slot offset values ​​of the corresponding basic time domain resource allocation table as the K0' values ​​in [Table 33] below. The K0 values ​​within the basic time domain resource allocation tables exemplified in [Table 27], [Table 28], and [Table 30] above can also be reinterpreted in the same way.

[0432] [Table 33]

[0433]

[0434] [Method 11]

[0435] According to one embodiment of the present disclosure, the terminal may reinterpret the slot offset (K0) value defined in the basic time domain resource allocation table defined for paging scheduling (or likewise for P-RNTI) based on the acquired minimum offset value. For example, the slot offset (K0) of the basic time domain resource allocation table may be reinterpreted by substituting it with the minimum offset (K0min). In other words, the terminal may reinterpret the K0 value in the basic time domain resource allocation table as K0', where the K0' value may be defined as follows.

[0436] K0' = K0min

[0437] For example, regarding the basic time domain resource allocation table in [Table 29] above, if the terminal is notified that K0min=1, the terminal can reinterpret the slot offset values ​​of the corresponding basic time domain resource allocation table as the K0' values ​​in [Table 34] below. The K0 values ​​within the basic time domain resource allocation tables exemplified in [Table 27], [Table 28], and [Table 30] above can also be reinterpreted in the same way.

[0438] [Table 34]

[0439]

[0440] In the third embodiment of the present disclosure, a method is proposed in which an idle mode terminal controls PDSCH reception based on the aforementioned cross-slot scheduling differently depending on the RNTI or search space.

[0441] In the present disclosure, the terminal may obtain information regarding a minimum offset value and whether to apply the minimum offset value in various ways by using at least one of the various methods exemplified in the first embodiment described above. The terminal may obtain scheduling information for the PDSCH based on the obtained minimum offset value. At this time, the terminal may determine whether to apply the obtained minimum offset value according to the RNTI or search space type. For example, at least one of [Method 12] to [Method 14] below or a combination thereof may be considered.

[0442] [Method 12]

[0443] The terminal may apply the acquired minimum offset value exclusively to the scheduling of paging messages. More specifically, the terminal may obtain time-domain resource allocation information by considering the acquired minimum offset value for PDSCHs scheduled in a DCI format scrambled with P-RNTI (or a DCI format received in the Type 2 common seek space). That is, the terminal can expect cross-slot scheduling based on the acquired minimum offset value for paging PDSCHs. The minimum offset value may not be applied to DCI formats scrambled with the remaining RNTIs (e.g., SI-RNTI, RA-RNTI, MsgB-RNTI, TC-RNTI) or DCI formats in the Type 0, Type 0A, and Type 1 common seek spaces. Accordingly, the terminal can reduce power consumption during periodic paging monitoring operations and minimize latency in other operations, such as receiving system information or performing random access.

[0444] [Method 13]

[0445] The terminal may apply the acquired minimum offset value exclusively to scheduling for SIB X other than SIB1 (or may be named OSI (Other System Information) or RMSI (Remaining System Information)). More specifically, the minimum offset value may be applied in the following cases.

[0446] - DCI format scrambled with P-RNTI monitored in a Type 2 common search space

[0447] - DCI format scrambled with SI-RNTI monitored in the Type0A common search space

[0448] The terminal can obtain time domain resource allocation information by considering the minimum offset value obtained for the PDSCH scheduled in the above case. The remaining RNTIs excluding this, for example,

[0449] - DCI format scrambled with SI-RNTI monitored in the Type 0 common search space

[0450] - DCI format scrambled into RA-RNTI, MsgB-RNTI, and TC-RNTI monitored in the Type 1 common search space

[0451] For PDSCHs scheduled as such, the minimum offset value may not be applied. Accordingly, the terminal can reduce power consumption during periodic paging monitoring operations and operations that receive intermittent system information where latency is not critical, such as SIB X. In addition, latency can be minimized during other operations, such as receiving SIB1 or performing random access.

[0452] [Method 14]

[0453] The terminal can apply the acquired minimum offset value to all PDSCH scheduling that can be received in idle mode. More specifically, the terminal can obtain time domain resource allocation information by applying the acquired minimum offset value to PDSCHs scheduled in DCI format of RNTIs (SI-RNTI, RA-RNTI, MsgB-RNTI, TC-RNTI, P-RNTI) monitored in idle mode or all common seek spaces (Type 0, Type 0A, Type 1, Type 2 common seek spaces). That is, the terminal can expect cross-slot scheduling based on the acquired minimum offset value for all PDSCHs that can be received in idle mode, and thereby maximize power consumption reduction.

[0454] In the fourth embodiment of the present disclosure, a method is proposed to support cross-slot scheduling for paging using a plurality of basic time domain resource allocation tables.

[0455] In one embodiment of the present disclosure, a base station may set or instruct a terminal whether to support cross-slot scheduling for paging via upper-layer signaling (e.g., MIB, SIB, or RRC information, etc.) or L1 signaling (e.g., paging PDCCH, DCI format scrambled with P-RNTI). The terminal may receive a setting or instruction from the base station regarding whether to support cross-slot scheduling for paging, and in this case, the terminal may assume a "second basic time domain resource allocation table." The "second basic time domain resource allocation table" may correspond to a table in which the minimum slot offset value (K0) within the table has a value greater than 0, or a table in which the slot offset value of all entries has a value greater than 0. The "second basic time domain resource allocation table" may be set from the base station to the terminal via upper-layer signaling or may correspond to a predefined fixed table. That is, a terminal configured to support cross-slot scheduling for paging can interpret scheduling information by assuming a basic time domain table A' instead of the conventional basic time domain table A, a basic time domain table B' instead of the conventional basic time domain table B, and a basic time domain table C' instead of the conventional basic time domain table C, respectively.

[0456] In one embodiment of the present disclosure, a terminal that has not received configuration information related to cross-slot scheduling for paging (setting information for a minimum offset value, setting information for whether to apply a minimum offset value, setting information for whether to apply cross-slot scheduling, etc.) may receive paging messages, etc. based on a conventional basic time domain resource allocation table (see [Table 27] to [Table 30]).

[0457] FIG. 17 is a drawing illustrating base station operation according to one embodiment of the present disclosure.

[0458] Referring to FIG. 17, in step 1701, the base station may transmit setting information and / or instruction information related to a minimum offset to a terminal according to at least one or a combination thereof of the methods described in the first to fourth embodiments above. If all or part of the setting information and / or instruction information related to the minimum offset is predefined or can be implicitly determined, the transmission operation of all or part of the setting information and / or instruction information transmitted to the terminal may be omitted.

[0459] In step 1702, the base station schedules a PDSCH transmission to the terminal based on a minimum offset value that is set / instructed / predefined / implicitly determined for the terminal. The scheduling information for the PDSCH transmission is conveyed to the terminal via the DCI transmitted through the PDSCH. If the minimum offset value for the terminal is predefined or implicitly determined, the base station can know the minimum offset value for that terminal in the same way. Through the scheduled PDSCH, the base station can transmit paging messages, SIBs, RMSIs, or data, etc., to that terminal.

[0460] FIG. 18 is a drawing illustrating a terminal operation according to one embodiment of the present disclosure.

[0461] Referring to FIG. 18, in step 1801, the terminal checks whether it has received setting information and / or instruction information related to a minimum offset from a base station according to at least one or a combination thereof of the methods described in the first to fourth embodiments above. If all or part of the setting information and / or instruction information related to the minimum offset is predefined or can be implicitly determined, the operation of receiving all or part of the setting information and / or instruction information from the base station may be omitted.

[0462] If the reception of configuration information and / or instruction information related to the minimum offset is confirmed in step 1801, the time domain allocation table can be interpreted based on the confirmed minimum offset value in step 1803, and information such as paging messages, SIBs, RMSIs, or data can be received from the PDSCH scheduled to the terminal. To explain the operation of step 1803 with reference to the second embodiment, based on the confirmed minimum offset, the terminal can reinterpret the basic time domain allocation table as described in [Table 32] to [Table 34] by at least one or a combination thereof of the methods described in the second embodiment, and receive paging messages, SIBs, RMSIs, or data from the PDSCH scheduled to the terminal by using a time domain allocation table in which the slot offset (K0) has been changed, or by using a second time domain allocation table determined in a predetermined manner or predefined. That is, the terminal can determine the slot offset to be applied to the basic time domain resource allocation table related to the cross-slot scheduling based on the information regarding the acquired minimum offset.

[0463] If no configuration information and / or instruction information related to the minimum offset is received in the above 1801 step, the terminal proceeds to the 1802 step and can receive paging messages, SIBs, RMSIs, or data, etc., from the PDSCH scheduled to the terminal using the basic time domain allocation tables exemplified in [Table 27] to [Table 30]. If the terminal has not received a time domain resource allocation table through upper layer signaling, or if the terminal can obtain scheduling information based on a predefined basic time domain resource allocation table for a data channel scheduled by a DCI format scrambled with a specific RNTI, there may be one or more predefined basic time domain resource allocation tables.

[0464] Meanwhile, the base station may set the terminal whether to implement the aforementioned embodiments. The terminal may receive setting information regarding whether to implement the aforementioned embodiments from the base station, and may control the operation of each embodiment differently based on the said setting information.

[0465] Whether the aforementioned embodiments are feasible may be notified from the terminal to the base station based on a terminal capability report. The base station may obtain whether the functions of the aforementioned embodiments are supported through the capability report from the terminal, and based thereon, may appropriately control operations based on the aforementioned embodiments for the terminal.

[0466] The aforementioned embodiments can be operated in combination with each other.

[0467] Methods according to the embodiments described in the claims or specification of the present disclosure may be implemented in the form of hardware, software, or a combination of hardware and software.

[0468] When implemented in software, a computer-readable storage medium may be provided for storing one or more programs (software modules). One or more programs stored in the computer-readable storage medium are configured for execution by one or more processors within an electronic device. One or more programs include instructions that cause the electronic device to execute methods according to the embodiments described in the claims or specification of this disclosure.

[0469] Such programs (software modules, software) may be stored in random access memory, non-volatile memory including flash memory, read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), magnetic disc storage devices, compact disc-ROM (CD-ROM), digital versatile discs (DVDs), or other forms of optical storage devices, magnetic cassettes. Alternatively, they may be stored in memory composed of some or all of these. Additionally, each constituent memory may include multiple units.

[0470] Additionally, the program may be stored on an attachable storage device that can be accessed via a communication network such as the Internet, Intranet, LAN (local area network), WAN (wide area network), or SAN (storage area network), or a combination thereof. Such a storage device may be connected to a device performing an embodiment of the present disclosure through an external port. Additionally, a separate storage device on a communication network may be connected to a device performing an embodiment of the present disclosure.

[0471] In the specific embodiments of the present disclosure described above, the components included in the disclosure are expressed in a singular or plural form according to the specific embodiments presented. However, the singular or plural expression is selected to suit the situation presented for convenience of explanation, and the present disclosure is not limited to singular or plural components; even if a component is expressed in the plural form, it may be composed of a singular form, and even if a component is expressed in the singular form, it may be composed of a plural form.

[0472] Meanwhile, although specific embodiments have been described in the detailed description of the present disclosure, it is understood that various modifications are possible within the scope of the present disclosure. Therefore, the scope of the present disclosure should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof.

Claims

Claim 1 A method performed by a terminal for resource allocation in a time domain in a wireless communication system, comprising: receiving from a base station configuration information for a time domain resource allocation table applicable to a physical downlink shared channel (PDSCH), configuration information indicating a minimum scheduling offset for scheduling a PDSCH to receive a paging message for the terminal, and configuration information for a specific set of control resources for monitoring a physical downlink control channel (PDCCH) for paging; monitoring the PDCCH for paging based on the specific set of control resources; receiving downlink control information (DCI) from the PDCCH for paging from the base station, wherein the DCI includes time domain resource allocation information for the PDSCH and information indicating whether the minimum scheduling offset is set, and includes a cyclic redundancy check (CRC) scrambled by a paging-radio network temporary identifier (P-RNTI) for paging; wherein, when the minimum scheduling offset is set for paging, the minimum scheduling offset, the A method comprising: a time domain resource allocation table, and a process of determining a first slot offset for scheduling the PDSCH based on the time domain resource allocation information; and a process of receiving a paging message from the PDSCH for paging based on the first slot offset, wherein the terminal operates in a power-saving mode between the time when the DCI is received from the PDCCH and the time when reception occurs in the PDSCH. Claim 2 A method according to claim 1, wherein the time domain resource allocation table includes location information of a start symbol within a slot where the PDSCH for paging is scheduled, symbol length information, and a second slot offset which is a basic slot offset, and wherein the first slot offset is determined based on at least one of the minimum scheduling offset and the second slot offset. Claim 3 A method in which the first slot offset is determined based on one of the following operations: an operation determined within a range greater than or equal to the minimum scheduling offset; an operation determined to be the smaller value between the minimum scheduling offset and the second slot offset; an operation in which the first slot offset is determined as the sum of the minimum scheduling offset and the second slot offset; and an operation in which the first slot offset is determined by replacing the second slot offset with the minimum scheduling offset. Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 In a terminal of a wireless communication system, a transceiver; and through the transceiver, receive from the base station configuration information for a time domain resource allocation table applicable to a PDSCH (physical downlink shared channel), configuration information indicating a minimum scheduling offset for scheduling a PDSCH to receive a paging message for the terminal, and configuration information for a specific set of control resources for monitoring a PDCCH (physical downlink control channel) for paging; through the transceiver, monitor the PDCCH for paging based on the specific set of control resources; through the transceiver, receive downlink control information (DCI) from the PDCCH for paging from the base station, wherein the DCI includes time domain resource allocation information for the PDSCH and information indicating whether the minimum scheduling offset is set, and includes a cyclic redundancy check (CRC) scrambled by a P-RNTI (paging-radio network temporary identifier) ​​for paging, and when the minimum scheduling offset is set for paging, the minimum scheduling offset, the A terminal comprising a time domain resource allocation table and a processor configured to determine a first slot offset for scheduling the PDSCH based on the time domain resource allocation information, and to receive a paging message from the PDSCH for paging based on the first slot offset from the base station through the transceiver, wherein the terminal operates in a power saving mode between the time when the DCI is received in the PDCCH and the time when reception occurs in the PDSCH. Claim 8 In claim 7, the time domain resource allocation table includes location information of a start symbol within a slot where the PDSCH for paging is scheduled, symbol length information, and a second slot offset which is a basic slot offset, and the first slot offset is determined based on at least one of the minimum scheduling offset and the second slot offset. Claim 9 In claim 8, the terminal further configured to determine the first slot offset based on one of the following operations: determining the first slot offset within a range greater than or equal to the minimum scheduling offset; determining the first slot offset as the smaller value between the minimum scheduling offset and the second slot offset; determining the first slot offset as the sum of the minimum scheduling offset and the second slot offset; and determining the first slot offset by replacing the second slot offset with the minimum scheduling offset. Claim 10 delete Claim 11 delete Claim 12 delete Claim 13 A method performed at a base station for resource allocation in the time domain in a wireless communication system, comprising: transmitting to a terminal configuration information for a time domain resource allocation table applicable to a physical downlink shared channel (PDSCH), configuration information indicating a minimum scheduling offset for scheduling a PDSCH to receive a paging message for the terminal, and configuration information for a specific set of control resources for monitoring a physical downlink control channel (PDCCH) for paging; and transmitting downlink control information (DCI) from the PDCCH for paging to the terminal, wherein the DCI includes information indicating whether the time domain resource allocation information for the PDSCH and the minimum scheduling offset are configured, and includes a cyclic redundancy check (CRC) scrambled by a paging-radio network temporary identifier (P-RNTI) for paging; A method comprising: a process of determining a first slot offset for scheduling the PDSCH based on the minimum scheduling offset, the time domain resource allocation table, and the time domain resource allocation information when the minimum scheduling offset is set for paging; and a process of transmitting a paging message in the PDSCH for paging based on the first slot offset. Claim 14 In claim 13, the time domain resource allocation table includes location information of a starting symbol within a slot where the PDSCH for paging is scheduled, symbol length information, and a second slot offset which is a basic slot offset, wherein the first slot offset is determined based on at least one of the minimum scheduling offset and the second slot offset. Claim 15 A method in which the first slot offset is determined based on one of the following operations: an operation determined within a range greater than or equal to the minimum scheduling offset; an operation determined to be the smaller value between the minimum scheduling offset and the second slot offset; an operation in which the first slot offset is determined as the sum of the minimum scheduling offset and the second slot offset; and an operation in which the first slot offset is determined by replacing the second slot offset with the minimum scheduling offset. Claim 16 delete Claim 17 delete Claim 18 delete Claim 19 In a base station of a wireless communication system, a transceiver; and, through the transceiver, transmit to the terminal configuration information regarding a time domain resource allocation table applicable to a PDSCH (physical downlink shared channel), configuration information indicating a minimum scheduling offset for scheduling a PDSCH to receive a paging message for the terminal, and configuration information regarding a specific set of control resources for monitoring a PDCCH (physical downlink control channel) for paging; and, through the transceiver, transmit downlink control information (DCI) from the PDCCH for paging to the terminal, wherein the DCI includes information indicating whether the time domain resource allocation information for the PDSCH and the minimum scheduling offset are set, and includes a cyclic redundancy check (CRC) scrambled by a paging-radio network temporary identifier (P-RNTI) for paging, and, when the minimum scheduling offset is set for paging, a first slot for scheduling the PDSCH based on the minimum scheduling offset, the time domain resource allocation table, and the time domain resource allocation information. A base station comprising a processor configured to check an offset and, through the transceiver, transmit a paging message in the PDSCH for paging based on the first slot offset. Claim 20 In claim 19, the time domain resource allocation table includes location information of a start symbol within a slot where the PDSCH for paging is scheduled, symbol length information, and a second slot offset which is a basic slot offset, wherein the first slot offset is determined based on at least one of the minimum scheduling offset and the second slot offset, and the first slot offset is determined based on one of the following operations: an operation in which the first slot offset is determined within a range greater than or equal to the minimum scheduling offset; an operation in which the first slot offset is determined as the smaller value between the minimum scheduling offset and the second slot offset; an operation in which the first slot offset is determined as the sum of the minimum scheduling offset and the second slot offset; and an operation in which the first slot offset is determined by replacing the second slot offset with the minimum scheduling offset.

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