Method and apparatus for performing paging in wireless communication system

Abstract

Disclosed are a method and an apparatus for performing paging in a wireless communication system. The method according to an embodiment of the present disclosure may comprise the steps of: receiving, by a terminal, configuration information for paging from a base station; and monitoring, by the terminal, at least one paging opportunity within a paging frame on the basis of the configuration information. In this case, the configuration information includes a parameter for deriving the number of paging frames within a cycle related to the paging, and the parameter may be defined to enable configuration of single paging frame during the cycle.

Description

Method and device for performing paging in a wireless communication system

[0001] The present disclosure relates to a wireless communication system, and more particularly, to a method and device for performing paging in a wireless communication system.

[0002] Mobile communication systems were developed to provide voice services while ensuring user activity. However, they have expanded beyond voice to include data services. Currently, explosive growth in traffic is leading to resource shortages and users' demand for higher-speed services, necessitating a more advanced mobile communication system.

[0003] Next-generation mobile communication systems must support explosive data traffic growth, dramatically increasing data rates per user, a vastly increased number of connected devices, ultra-low end-to-end latency, and high energy efficiency. To achieve these goals, various technologies are being studied, including dual connectivity, massive multiple input multiple output (MIMO), in-band full duplex, non-orthogonal multiple access (NOMA), super wideband support, and device networking.

[0004] The technical problem of the present disclosure is to provide a method and device for performing paging in a wireless communication system.

[0005] The technical problem of the present disclosure is to provide a method and device for setting / instructing / performing paging considering network energy saving (NES).

[0006] The technical problems to be achieved in the present disclosure are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present disclosure belongs from the description below.

[0007] A method according to one aspect of the present disclosure may include the steps of: receiving, by a terminal, configuration information for paging from a base station; and monitoring, by the terminal, at least one paging opportunity within a paging frame based on the configuration information. Here, the configuration information includes a parameter for deriving the number of paging frames within a cycle associated with the paging, and the parameter may be defined to enable configuring a single paging frame during the cycle.

[0008] A method according to an additional aspect of the present disclosure may include the steps of: receiving, by a base station, capability information related to network energy saving from a terminal; and transmitting, by the base station, configuration information for paging to the terminal based on the capability information. Here, the configuration information includes a parameter for deriving the number of paging frames within a cycle related to the paging, and the parameter may be defined to enable configuring a single paging frame during the cycle.

[0009] According to various embodiments of the present disclosure, a method and apparatus for performing paging in a wireless communication system can be provided.

[0010] According to various embodiments of the present disclosure, a method and device for setting / instructing / performing paging taking network energy saving (NES) into account can be provided.

[0011] By various embodiments of the present disclosure, there is a technical effect that can achieve the NES effect by increasing the interval between paging frames and defining that paging occasions can be allocated consecutively.

[0012] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned will be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains from the description below.

[0013] The accompanying drawings, which are incorporated in and are part of the detailed description to aid in understanding the present disclosure, provide embodiments of the present disclosure and, together with the detailed description, describe the technical features of the present disclosure.

[0014] Figure 1 illustrates the structure of a wireless communication system to which the present disclosure can be applied.

[0015] FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.

[0016] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure can be applied.

[0017] FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure can be applied.

[0018] FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.

[0019] FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission and reception method using the same.

[0020] FIG. 7 illustrates a flexible network topology to which some examples of the present disclosure may be applied.

[0021] FIG. 8 illustrates an example of an operation procedure of a base station supporting NES technology applicable to the present disclosure.

[0022] Figure 9 is an example diagram showing a paging procedure.

[0023] FIG. 10 is a diagram for explaining the operation of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0024] FIG. 11 is a diagram for explaining the operation of a base station in a wireless communication system according to an embodiment of the present disclosure.

[0025] FIG. 12 illustrates a block diagram of a wireless communication device according to one embodiment of the present disclosure.

[0026] Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description set forth below, together with the accompanying drawings, is intended to explain exemplary embodiments of the present disclosure and is not intended to represent the only embodiments in which the present disclosure may be practiced. The following detailed description includes specific details to provide a thorough understanding of the present disclosure. However, one of ordinary skill in the art will appreciate that the present disclosure may be practiced without these specific details.

[0027] In some cases, to avoid obscuring the concepts of the present disclosure, known structures and devices may be omitted or illustrated in block diagram form focusing on the core functions of each structure and device.

[0028] In the present disclosure, when a component is said to be "connected," "coupled," or "connected" to another component, this may include not only a direct connection but also an indirect connection in which another component exists between them. Furthermore, the terms "comprises" or "has" in the present disclosure specify the presence of the mentioned features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0029] In this disclosure, terms such as “first,” “second,” etc. are used only to distinguish one component from another and are not used to limit the components, and do not limit the order or importance between the components unless specifically stated otherwise. Accordingly, within the scope of this disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and similarly, a second component in one embodiment may be referred to as a first component in another embodiment.

[0030] The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the scope of the claims. As used in the description of the embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. The term "and / or" as used herein may refer to any one of the associated enumerated items, or is meant to refer to and encompass any and all possible combinations of two or more of them. Furthermore, the use of " / " between words in this disclosure has the same meaning as "and / or" unless otherwise stated.

[0031] The present disclosure describes a wireless communication network or a wireless communication system, and operations performed in the wireless communication network may be performed in a process of controlling the network and transmitting or receiving a signal from a device (e.g., a base station) that manages the wireless communication network, or in a process of transmitting or receiving a signal to or between terminals connected to the wireless network.

[0032] In the present disclosure, transmitting or receiving a channel means transmitting or receiving information or a signal through the channel. For example, transmitting a control channel means transmitting control information or a signal through the control channel. Similarly, transmitting a data channel means transmitting data information or a signal through the data channel.

[0033] Hereinafter, downlink (DL) refers to communication from a base station to a terminal, and uplink (UL) refers to communication from a terminal to a base station. In downlink, a transmitter may be part of a base station, and a receiver may be part of a terminal. In uplink, a transmitter may be part of a terminal, and a receiver may be part of a base station. A base station may be expressed as a first communication device, and a terminal may be expressed as a second communication device. A base station (BS) may be replaced by terms such as a fixed station, Node B, eNB (evolved-NodeB), gNB (Next Generation NodeB), BTS (base transceiver system), access point (AP: Access Point), network (5G network), AI (Artificial Intelligence) system / module, RSU (road side unit), robot, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.In addition, the terminal may be fixed or mobile, and may be replaced with terms such as UE (User Equipment), MS (Mobile Station), UT (user terminal), MSS (Mobile Subscriber Station), SS (Subscriber Station), AMS (Advanced Mobile Station), WT (Wireless terminal), MTC (Machine-Type Communication) device, M2M (Machine-to-Machine) device, D2D (Device-to-Device) device, vehicle, RSU (road side unit), robot, AI (Artificial Intelligence) module, UAV (Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device, etc.

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

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

[0036] For clarity, the description is based on 3GPP communication systems (e.g., LTE-A, NR, 6G), but the technical spirit of the present disclosure is not limited thereto. LTE refers to technology after 3GPP TS (Technical Specification) 36.xxx Release 8. Specifically, LTE technology after 3GPP TS 36.xxx Release 10 is referred to as LTE-A, and LTE technology after 3GPP TS 36.xxx Release 13 is referred to as LTE-A pro. 3GPP NR refers to technology after TS 38.xxx Release 15. LTE / NR / 6G may be referred to as a 3GPP system. “xxx” refers to a standard document detail number. LTE / NR / 6G may be collectively referred to as a 3GPP system. For background technology, terms, abbreviations, etc. used in the description of the present disclosure, reference may be made to matters described in standard documents published prior to the present disclosure. For example, reference may be made to the following documents.

[0037] For 3GPP LTE, see TS 36.211 (Physical channels and modulation), TS 36.212 (Multiplexing and channel coding), TS 36.213 (Physical layer procedures), TS 36.300 (General description), and TS 36.331 (Radio resource control).

[0038] For 3GPP NR, see TS 38.211 (Physical channels and modulation), TS 38.212 (Multiplexing and channel coding), TS 38.213 (Physical layer procedures for control), TS 38.214 (Physical layer procedures for data), TS 38.300 (Overall description of NR and New Generation-Radio Access Network (NG-RAN)), and TS 38.331 (Radio Resource Control Protocol Specification).

[0039] Abbreviations for terms that may be used in this disclosure are defined as follows.

[0040] - BM: beam management

[0041] - CQI: Channel Quality Indicator

[0042] - CRI: Channel state information - reference signal resource indicator

[0043] - CSI: Channel State Information

[0044] - CSI-IM: Channel State Information - Interference Measurement

[0045] - CSI-RS: Channel state information - reference signal

[0046] - DMRS: Demodulation Reference Signal

[0047] - FDM: frequency division multiplexing

[0048] - FFT: fast Fourier transform

[0049] - IFDMA: interleaved frequency division multiple access

[0050] - IFFT: inverse fast Fourier transform

[0051] - L1-RSRP: Layer 1 reference signal received power

[0052] - L1-RSRQ: Layer 1 reference signal received quality

[0053] - MAC: Medium Access Control

[0054] - NZP: non-zero power

[0055] - OFDM: orthogonal frequency division multiplexing

[0056] - PDCCH: Physical downlink control channel

[0057] - PDSCH: Physical downlink shared channel

[0058] - PMI: precoding matrix indicator

[0059] - RE: resource element

[0060] - RI: Rank indicator

[0061] - RRC: Radio Resource Control

[0062] - RSSI: Received signal strength indicator

[0063] - Rx: Reception

[0064] - QCL: quasi co-location

[0065] - SINR: signal to interference and noise ratio

[0066] - SSB (or SS / PBCH block): Synchronization signal block (including primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH))

[0067] - TDM: Time Division Multiplexing

[0068] - TRP: transmission and reception point

[0069] - TRS: Tracking Reference Signal

[0070] - Tx: transmission

[0071] - UE: user equipment

[0072] - ZP: Zero Power

[0073] System General

[0074] As more and more communication devices demand greater communication capacity, the need for improved mobile broadband communications compared to existing radio access technologies (RATs) is emerging. Furthermore, massive machine type communications (MTC), which connects numerous devices and objects to provide diverse services anytime, anywhere, is also a key issue to be considered in next-generation communications. Furthermore, communication system design that considers reliability and latency-sensitive services / terminals is being discussed. Accordingly, the introduction of next-generation RATs that consider enhanced mobile broadband communication (eMBB), massive MTC (MMTC), and ultra-reliable and low latency communication (URLLC) is being discussed. For convenience, these technologies are referred to as NR in this disclosure. NR is an expression representing an example of 5G RAT.

[0075] As mentioned above, the NR system, a successor to LTE (long term evolution), is a new clean-slate mobile communications system characterized by high performance, low latency, and high availability. NR systems can utilize all available spectrum resources, from low-frequency bands below 1 GHz, to intermediate-frequency bands between 1 GHz and 10 GHz, and high-frequency (millimeter wave) bands above 24 GHz. Based on the underlying technology of the NR system, the 6G mobile communications system (hereinafter referred to as the 6G system) is being developed.

[0076] The 6G system aims to provide (i) very high data rates per device, (ii) a very large number of connected devices, (iii) global connectivity, (iv) very low latency, (v) low energy consumption for battery-free Internet of Things (IoT) devices, (vi) ultra-reliable connectivity, and (vii) connected intelligence with machine learning capabilities. The vision of the 6G system can be divided into four aspects: intelligent connectivity, deep connectivity, holographic connectivity, and ubiquitous connectivity.

[0077] New RAT systems, including NR systems and 6G systems (hereinafter referred to as "next-generation RAT systems"), utilize OFDM transmission schemes or similar transmission schemes. Next-generation RAT systems may follow OFDM parameters different from those of LTE. Alternatively, next-generation RAT systems may follow the existing LTE / LTE-A numerology but support a larger system bandwidth (e.g., 100 MHz). Alternatively, a single cell may support multiple numerologies. That is, terminals operating under different numerologies may coexist within a single cell.

[0078] A numerology corresponds to a single subcarrier spacing in the frequency domain. Different numerologies can be defined by scaling the reference subcarrier spacing by an integer N.

[0079] Figure 1 illustrates the structure of a wireless communication system to which the present disclosure can be applied.

[0080] Referring to Fig. 1, the NG-RAN consists of gNBs that provide NG-RA (NG-Radio Access) user plane (i.e., new AS (access stratum) sublayer / PDCP (packet data convergence protocol) / RLC (radio link control) / MAC / PHY) and control plane (RRC) protocol termination for UE. The gNBs are interconnected via Xn interfaces. The gNBs are also connected to the NGC (New Generation Core) via the NG interface. More specifically, the gNBs are connected to the AMF (Access and Mobility Management Function) via the N2 interface and to the UPF (User Plane Function) via the N3 interface.

[0081] FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.

[0082] Next-generation RAT systems can support multiple numerologies. Numerologies can be defined by subcarrier spacing and cyclic prefix (CP) overhead. Multiple subcarrier spacings can be derived by scaling the base (reference) subcarrier spacing by an integer N (or μ). Furthermore, even if it is assumed that very low subcarrier spacing is not used at very high carrier frequencies, the numerology used can be selected independently of the frequency band. Furthermore, next-generation RAT systems can support various frame structures corresponding to multiple numerologies.

[0083] Below, we examine OFDM numerologies and frame structures that can be considered in next-generation RAT systems. The various OFDM numerologies supported in next-generation RAT systems can be defined as shown in Table 1 below.

[0084] μΔf=2 μ ·15 [kHz]CP015 Normal 130 Normal 260 Normal, Extended 3120 Normal 4240 Normal

[0085] Next-generation RAT systems support multiple numerologies (or subcarrier spacings (SCS)) to support various 5G / 6G services. For example, an SCS of 15 kHz supports a wide area in traditional cellular bands; an SCS of 30 kHz / 60 kHz supports dense-urban, lower latency, and wider carrier bandwidth; and an SCS of 60 kHz or higher supports a bandwidth greater than 24.25 GHz to overcome phase noise. Although not described in Table 1, an SCS of 480 kHz / 960 kHz may be additionally supported for 6G systems.

[0086] The frequency bands of next-generation RAT systems are defined by various types of frequency ranges (e.g., FR1, FR2, etc.). For example, FR1 and FR2 can be configured as shown in Table 2 below. Additionally, FR2 can refer to millimeter wave (mmW).

[0087] Frequency Range Designation Corresponding Frequency Range Subcarrier Spacing FR1410MHz - 7125MHz 15, 30, 60kHz FR224250MHz - 52600MHz 60, 120, 240kHz

[0088] Regarding the frame structure in the next-generation RAT system, the sizes of various fields in the time domain are T c =1 / (Δf max ·N f ) is expressed as a multiple of the time unit. Here, Δf max =480·10 3 Hz, and N f =4096. Downlink and uplink transmissions are T f =1 / (Δf max N f / 100)·T c = It is organized into radio frames with a duration of 10ms. Here, each radio frame is T sf =(Δf max N f / 1000)·T c It consists of 10 subframes with a duration of 1ms. In this case, there may be one set of frames for the uplink and one set of frames for the downlink.

[0089] Additionally, transmission at uplink frame number i from the terminal is T earlier than the start of the corresponding downlink frame from the terminal. TA =(N TA +N TA,offset )T c It should start before. For the subcarrier spacing configuration μ, slots are n within a subframe. s μ ∈{0,..., N slotsubframe,μ-1} are numbered in increasing order, and n within a radio frame. s,f μ ∈{0,..., N slot frame,μ -1} are numbered in increasing order. One slot is N symb slot It consists of consecutive OFDM symbols, and N symb slot is determined by CP. Slot n in subframe s μ The start of OFDM symbol n in the same subframe s μ N symb slot are aligned temporally with the start of the OFDM signal. Not all terminals can transmit and receive simultaneously, which means that not all OFDM symbols in a downlink slot or uplink slot can be utilized.

[0090] Table 3 shows the number of OFDM symbols per slot in a general CP (N symb slot ), the number of slots per wireless frame (N slot frame,μ ), number of slots per subframe (N slot subframe,μ), and Table 4 shows the number of OFDM symbols per slot in the extended CP, the number of slots per radio frame, and the number of slots per subframe.

[0091] μN symb slot N slot frame,μ N slot subframe,μ01410111420221440431480841416016

[0092] μN symb slot N slot frame,μ N slot subframe,μ212404

[0093] FIG. 2 is an example when μ=2 (SCS is 60 kHz), and referring to Table 3, 1 subframe can include 4 slots. 1 subframe={1,2,4} slot illustrated in FIG. 2 is an example, and the number of slot(s) that can be included in 1 subframe is defined as in Table 3 or Table 4. In addition, a mini-slot can include 2, 4, or 7 symbols, or more or fewer symbols.

[0094] Regarding physical resources in a next-generation RAT system, antenna ports, resource grids, resource elements, resource blocks, and carrier parts may be considered. Below, the physical resources that may be considered in a next-generation RAT system will be examined in detail.

[0095] First, with respect to antenna ports, antenna ports are defined such that the channel through which a symbol on an antenna port is carried can be inferred from the channel through which another symbol on the same antenna port is carried. Two antenna ports are said to be in a QC / QCL (quasi co-located or quasi co-location) relationship if the large-scale properties of the channel through which a symbol on one antenna port is carried can be inferred from the channel through which a symbol on another antenna port is carried. Here, the large-scale properties include one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0096] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure can be applied.

[0097] Referring to Figure 3, the resource grid is N in the frequency domain. RB μ N sc RB It consists of subcarriers, and one subframe is 14·2 μ It is described as an example, but not limited to, that it consists of OFDM symbols. In the next-generation RAT system, the transmitted signal is N RB μ N sc RB One or more resource grids consisting of subcarriers and 2 μ N symb (μ) is described by OFDM symbols. Here, N RB μ ≤N RB max,μ is. The above N RB max,μ represents the maximum transmission bandwidth, which may vary between uplink and downlink as well as between numerologies. In this case, one resource grid may be configured for μ and antenna port p. Each element of the resource grid for μ and antenna port p is referred to as a resource element and is uniquely identified by an index pair (k, l'), where k=0,...,N. RB μ N sc RB -1 is the index in the frequency domain, and l'=0,...,2 μ N symb (μ) -1 indicates the position of the symbol within the subframe. When referring to a resource element in a slot, an index pair (k,l) is used. Here, l=0,...,N symb μ-1. The resource element (k,l') for μ and antenna port p is a complex value a k,l' (p,μ) . If there is no risk of confusion or if a particular antenna port or numerology is not specified, the indices p and μ can be dropped, resulting in a complex value of a k,l' (p) or a k,l' This can be. Also, a resource block (RB) is N in the frequency domain. sc RB =12 is defined as consecutive subcarriers.

[0098] Point A serves as a common reference point of the resource block grid and is obtained as follows.

[0099] - offsetToPointA for the Primary Cell (PCell) downlink represents the frequency offset between point A and the lowest subcarrier of the lowest resource block overlapping the SS / PBCH block used by the UE for initial cell selection. It is expressed in resource block units assuming 15 kHz subcarrier spacing for FR1 and 60 kHz subcarrier spacing for FR2.

[0100] - absoluteFrequencyPointA represents the frequency-position of point A expressed as ARFCN (absolute radio-frequency channel number).

[0101] Common resource blocks (CRBs) are numbered from 0 upwards in the frequency domain for a subcarrier spacing setting μ. The center of subcarrier 0 of CRB 0 for a subcarrier spacing setting μ coincides with 'point A'. Common resource block number n in the frequency domain CRB μ The relationship between the resource elements (k, l) and the subcarrier spacing setting μ is given by the following mathematical expression 1.

[0102]

[0103] In Equation 1, k is defined relative to point A such that k = 0 corresponds to the subcarrier centered at point A. Physical resource blocks are numbered from 0 to N within the bandwidth part (BWP). BWP,i size,μ - Numbered from 1 to 1, where i is the number of the BWP. Physical resource block n in BWP i PRB and common resource block n CRB The relationship between them is given by the mathematical formula 2 below.

[0104]

[0105] N BWP,i start,μ is a common resource block where BWP starts relative to common resource block 0.

[0106] FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure can be applied. FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.

[0107] Referring to FIGS. 4 and 5, a slot includes multiple symbols in the time domain. For example, in the case of a normal CP, one slot includes seven symbols, but in the case of an extended CP, one slot includes six symbols.

[0108] A carrier comprises multiple subcarriers in the frequency domain. An RB (Resource Block) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A BWP (Bandwidth Part) is defined as multiple consecutive (physical) resource blocks in the frequency domain, and can correspond to a single numerology (e.g., SCS, CP length, etc.). A carrier can comprise up to N (e.g., 5) BWPs. Data communication is performed through activated BWPs, and only one BWP can be activated for a single terminal. Each element in the resource grid is referred to as a Resource Element (RE), to which one complex symbol can be mapped.

[0109] Next-generation RAT systems can support up to 400 MHz per component carrier (CC). If a terminal operating on such a wideband CC always operates with the radio frequency (RF) chip for the entire CC turned on, the terminal battery consumption may increase. Alternatively, when considering multiple use cases operating within a single wideband CC (e.g., eMBB, URLLC, Mmtc, V2X, etc.), different numerologies (e.g., subcarrier spacing, etc.) may be supported for each frequency band within the CC. Alternatively, each terminal may have different maximum bandwidth capabilities. Considering this, the base station can instruct the terminal to operate only in a portion of the bandwidth of the wideband CC, rather than the entire bandwidth. This portion of bandwidth is conveniently defined as the bandwidth part (BWP). A BWP can be composed of consecutive RBs on the frequency axis and can correspond to a single numerology (e.g., subcarrier spacing, CP length, slot / mini-slot interval).

[0110] Meanwhile, a base station can configure multiple BWPs even within a single CC configured for a terminal. For example, a BWP occupying a relatively small frequency domain can be configured in a PDCCH monitoring slot, while the PDSCH indicated by the PDCCH can be scheduled on a larger BWP.

[0111] Alternatively, if UEs are concentrated in a specific BWP, some UEs can be assigned to different BWPs for load balancing. Alternatively, considering frequency domain inter-cell interference cancellation between neighboring cells, some spectrum in the middle of the total bandwidth can be excluded and both BWPs can be assigned within the same slot. In other words, the base station can assign at least one DL / UL BWP to UEs associated with a wideband CC.

[0112] The base station can activate at least one DL / UL BWP among the DL / UL BWP(s) configured at a specific point in time (by L1 signaling or MAC CE (Control Element) or RRC signaling, etc.). In addition, the base station can instruct switching to another configured DL / UL BWP (by L1 signaling or MAC CE or RRC signaling, etc.). Alternatively, switching to a designated DL / UL BWP may be performed when a timer value expires based on a timer. In this case, the activated DL / UL BWP is defined as an active DL / UL BWP. However, since the UE may not receive the configuration for the DL / UL BWP when performing the initial access process or before the RRC connection is set up, the DL / UL BWP assumed by the UE in such a situation is defined as the initially active DL / UL BWP.

[0113] FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure can be applied and a general signal transmission and reception method using the same.

[0114] In wireless communication systems, terminals receive information from a base station via the downlink and transmit it to the base station via the uplink. The information transmitted and received between the base station and terminals includes data and various control information, and various physical channels exist depending on the type and purpose of the information being transmitted and received.

[0115] The second node of FIG. 6 supports dynamic spectrum sharing (DSS), which can provide connectivity not only to nodes implementing 6G technology but also to nodes implementing pre-6G wireless communication technologies (e.g., 5G, 4G). That is, the first node of FIG. 6 can implement either 6G technology or pre-6G wireless communication technologies (e.g., 5G, 4G). Furthermore, the first node and / or the second node can support full duplex mode as well as non-overlapping full duplex mode.

[0116] In Fig. 6, for the sake of simplicity of explanation, the first node and the second node are assumed to be a terminal and a base station, respectively, and operations of transmitting and / or receiving data by the terminal (110) and the base station (120) and operations performed prior thereto are illustrated. However, the operations of Fig. 6 are not limited to operations between the terminal and the base station, and may be interpreted as operations between the first node and the second node. In addition, although Fig. 6 illustrates direct wireless signal transmission and reception operations between the terminal (110) and the base station (120), one or more intermediate points may exist between the terminal (110) and the base station (120), and wireless signals may be transmitted and received via one or more intermediate points.

[0117] Referring to FIG. 6, in step 101, the terminal (110) and the base station (120) perform synchronization. For example, the terminal (110) performs an initial cell search operation. Specifically, the terminal (110) can detect a synchronization signal for connection to at least one base station transmitted from the base station (120) according to a predefined rule. Here, the synchronization signal can include a plurality of synchronization signals classified according to structure or purpose (e.g., a first synchronization signal (e.g., a primary synchronization signal), a second synchronization signal (e.g., a secondary synchronization signal), etc.). Through this, the terminal (110) can confirm the boundary of a unit (e.g., a frame, a subframe, a slot, and / or a symbol) constituting a wireless signal transmission of the base station (120) and obtain information (e.g., a cell identifier) ​​about the base station (120).

[0118] In step 103, the terminal (110) obtains system information transmitted from the base station (120). The system information is information related to the properties, characteristics, and / or capabilities of the base station (120) required to access the base station (120) and use the service, and may be classified according to the content (e.g., whether it is essential for access), transmission structure (e.g., channel used, whether provided on-demand), etc., and may be classified into, for example, first system information (e.g., master information block (MIB), primary system information), second system information (e.g., system information block (SIB), secondary system information), etc. If necessary, the terminal (110) may transmit a signal requesting system information before receiving the system information. However, the request and provision of the system information may be performed after the random access procedure described below.

[0119] In step 105, the terminal (110) and the base station (120) perform a random access procedure. The terminal (110) may transmit and / or receive at least one message (e.g., a random access preamble, a random access response (RAR) message, etc.) for the random access procedure based on information related to a channel for the random access procedure of the base station (120) obtained through system information (e.g., a channel position, a channel structure, a structure of a supported preamble, etc.). For example, the terminal (110) may transmit a first message (e.g., a preamble, MSG1) through the channel for the random access procedure, receive a second message (e.g., an RAR message, MSG2), transmit a third message (e.g., MSG3) including information related to the terminal (110) (e.g., identification information) to the base station (120) using scheduling information included in the second message, and receive a fourth message (e.g., MSG4) for contention resolution and / or connection establishment. As another example, the first and third messages may be sent and received as one message, or the second and fourth messages may be sent and received as one message.

[0120] In step 107, the terminal (110) and the base station (120) perform signaling of control information. Here, the control information may be defined in various layers, such as a layer that controls a connection (e.g., a radio resource control (RRC) layer), a layer that handles mapping between logical channels and transport channels (e.g., a media access control (MAC) layer), and a layer that handles physical channels (e.g., a physical (PHY) layer). For example, the terminal (110) and the base station (120) may perform at least one of signaling for establishing a connection, signaling for determining settings related to communication, and signaling for indicating allocated resources.

[0121] In step 109, the terminal (110) and the base station (120) transmit and / or receive data. In other words, the terminal (110) and the base station (120) can process, transmit, and / or receive data based on the signaling of the control information. For example, when transmitting data, the terminal (110) or the base station (120) can perform at least one of channel encoding, rate matching, scrambling, constellation mapping, layer mapping, waveform modulation, antenna mapping, and resource mapping on the information bits. Conversely, when receiving data, the terminal (110) or the base station (120) can perform at least one of signal extraction from resources, waveform demodulation for each antenna, signal arrangement considering layer mapping, constellation demapping, descrambling, and channel decoding.

[0122] Table 5 shows an example of DCI format in the next-generation RAT system.

[0123] DCI Format Utilization 0_0 Scheduling of PUSCH within a cell 0_1 Scheduling of one or multiple PUSCH within a cell, or indicating cell group (CG: cell group) downlink feedback information to the UE 0_2 Scheduling of PUSCH within a cell 1_0 Scheduling of PDSCH within a DL cell 1_1 Scheduling of PDSCH within a cell 1_2 Scheduling of PDSCH within a cell

[0124] Referring to Table 5, DCI formats 0_0, 0_1, and 0_2 may include resource information related to scheduling of PUSCH (e.g., UL / SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), transport block (TB) related information (e.g., MCS (Modulation Coding and Scheme), NDI (New Data Indicator), RV (Redundancy Version), etc.), HARQ (Hybrid - Automatic Repeat and request) related information (e.g., process number, DAI (Downlink Assignment Index), PDSCH-HARQ feedback timing, etc.), multi-antenna related information (e.g., DMRS sequence initialization information, antenna port, CSI request, etc.), power control information (e.g., PUSCH power control, etc.), and the control information included in each DCI format may be predefined. DCI format 0_0 is used for scheduling of PUSCH in one cell. Information included in DCI format 0_0 is transmitted after being CRC (cyclic redundancy check) scrambled by C-RNTI (cell radio network temporary identifier, Cell RNTI), CS-RNTI (Configured Scheduling RNTI), or MCS-C-RNTI (Modulation Coding Scheme Cell RNTI). DCI format 0_1 ​​is used to indicate scheduling of one or more PUSCHs in one cell, or configured grant (CG) downlink feedback information to a UE. Information included in DCI format 0_1 ​​is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI (Semi-Persistent CSI RNTI), or MCS-C-RNTI.DCI format 0_2 is used for scheduling PUSCH in a cell. The information contained in DCI format 0_2 is CRC-scrambled and transmitted using C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI.

[0125] Next, DCI formats 1_0, 1_1, and 1_2 may include resource information related to scheduling of PDSCH (e.g., frequency resource allocation, time resource allocation, virtual resource block (VRB)-physical resource block (PRB) mapping, etc.), transport block (TB) related information (e.g., MCS, NDI, RV, etc.), HARQ related information (e.g., process number, DAI, PDSCH-HARQ feedback timing, etc.), multi-antenna related information (e.g., antenna port, transmission configuration indicator (TCI), sounding reference signal (SRS) request, etc.), PUCCH related information (e.g., PUCCH power control, PUCCH resource indicator, etc.), and control information included in each DCI format may be predefined.

[0126] DCI format 1_0 is used for scheduling PDSCH in a DL cell. The information contained in DCI format 1_0 is CRC-scrambled and transmitted using C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0127] DCI format 1_1 is used for scheduling PDSCH in a single cell. The information contained in DCI format 1_1 is CRC-scrambled and transmitted using C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0128] DCI format 1_2 is used for scheduling PDSCH in a single cell. The information contained in DCI format 1_2 is CRC-scrambled and transmitted using C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0129] FIG. 7 illustrates a flexible network topology to which some examples of the present disclosure may be applied.

[0130] To compensate for incomplete network coverage areas, a network topology that allows for more flexible and resilient split radio access networks (RANs) may be considered. For this purpose, various nodes, such as IAB nodes, relays, and RF repeaters, as illustrated in the example of Figure 7, may be applied, or NTNs may be integrated. For example, an IAB node may correspond to a node that provides wireless backhaul. For example, a relay may refer to any intermediate point, or in the case of a sidelink relay where a terminal functions as a relay, it may collectively refer to a terminal-to-network (U2N) relay and a terminal-to-terminal (U2U) relay. For example, an RF repeater may correspond to a node that simply performs the function of signal amplification and forwarding, while a network-controlled repeater may not only amplify and forward signals but also adjust transmission and reception settings based on information provided by the network. For example, an NTN node may correspond to a satellite or aircraft that provides NTN coverage that is difficult for terrestrial networks to provide. In addition to these examples, various intermediate points can be introduced to improve the network topology.

[0131] Referring to Figure 7, a split RAN can support the division of a base station into a centralized unit (CU) and one or more distributed units (DUs). The CU and DU can correspond to logical units. The CU can be further divided into a control plane (CP) portion and one or more user plane (UP) portions. Since a failure in the CU-CP affects not only the CU-UP but also the DUs, various intermediate points can be introduced to compensate for this.

[0132] An intermediate point may correspond to a terminal or a base station, depending on its relationship to other nodes. For example, an IAB node may include a mobile-termination (MT) portion and a unit (DU). The MT may connect the IAB node to a donor node. The unit (DU) of an IAB node may serve other terminals or connect to other IAB nodes to provide multi-hop wireless backhaul to the terminal. In other words, an IAB node may correspond to a base station in its relationship to a user-side node, and to a terminal in its relationship to a network-side node.

[0133] In some examples of the present disclosure, the description of a terminal may equally apply not only to a user-side endpoint, but also to an intermediate point corresponding to a terminal in a relative relationship with a network-side endpoint. Similarly, in some examples of the present disclosure, the description of a base station may equally apply not only to a network-side endpoint, but also to an intermediate point corresponding to a base station in a relative relationship with a user-side endpoint. However, in most cases where there is no additional description of the operations of three or more entities, the communicating entities in the present disclosure are briefly described as terminals and / or base stations (or first nodes and / or second nodes), and the terms terminal and / or base stations (or first nodes and / or second nodes) are interpreted to include / replace any endpoint or any intermediate point in relation to other nodes.

[0134] That is, in some examples of the present disclosure, for the sake of simplicity of explanation, the subjects of the operation may be referred to as a base station and / or a terminal (or a first node and / or a second node). In addition, the terms base station and / or terminal (or a first node and / or a second node) may also be interpreted / replaced as in the following examples: For example, the base station (or a first node) and the terminal (or a second node) may respectively correspond to a first endpoint and a second endpoint; may respectively correspond to an endpoint and an intermediate point; may respectively correspond to an intermediate point and an endpoint; or may respectively correspond to a first intermediate point and a second intermediate point.

[0135] In the present disclosure, there may be zero or more intermediate points between the base station and the terminal. If intermediate points exist, they may be IAB nodes / relays / RF repeaters / NTN (non-terrestrial network) nodes, or nodes supporting other functions. The intermediate points may be nodes with fixed locations or nodes with unfixed locations.

[0136] Network Energy Saving (NES)

[0137] Energy conservation at base stations is a key consideration in wireless communication systems, including 3GPP, as it can contribute to building eco-friendly networks by reducing carbon emissions and reducing operational expenditures (OPEX) for telecommunications companies. In particular, the introduction of 5G communications will require higher transmission rates, necessitating base stations to be equipped with more antennas and provide services over wider bandwidths and frequency bands. Consequently, recent studies have shown that base station energy costs have reached as high as 20% of total OPEX. Accordingly, 5G systems are adopting various technologies to reduce energy consumption, known as network energy savings (NES), and the standardization of related technologies will continue.

[0138] Depending on the application of NES technology, the base station can perform operations such as controlling on / off for a certain duration in the time domain, controlling transmission / reception resources for UE-common or UE-specific signals / channels, changing the amount of frequency domain resources, controlling transmission power, or turning on / off antenna ports, transmission-reception points (TRPs), etc. in the spatial domain.

[0139] FIG. 8 illustrates an example of an operation procedure of a base station supporting NES technology applicable to the present disclosure.

[0140] Referring to Figure 8, the base station can identify the NES solution(s) to be applied. The NES solution(s) may be related to signal transmission and reception control (e.g., on / off), beam operation, handover procedures, channel measurement, and reporting. The NES solution(s) to be applied can be adaptively selected or predefined based on current conditions (e.g., cell load level, characteristics of connected terminals, etc.).

[0141] A base station that has identified an NES solution(s) can perform signaling for the NES. The specific signaling procedure may vary depending on the identified NES solution(s). For example, the base station may transmit common information about the NES solution(s), transmit configuration information necessary for NES operation to at least one terminal, or transmit control information regarding the progress of NES operation to at least one terminal. In addition, the base station may receive capability information related to the NES from at least one terminal.

[0142] Thereafter, the base station can perform operations for the NES. At this time, the base station can perform operations for the NES based on the previously performed signaling. That is, based on the system information, configuration information, and control information conveyed through the signaling, the base station can turn on / off the transmission and reception of specific signals, turn on / off elements in the spatial domain, or adjust resources for the transmission and reception of measurement signals.

[0143] Through a procedure similar to that in Fig. 8, NES technology can be implemented. Examples of NES solutions that can be implemented through a procedure similar to that in Fig. 8 are as follows.

[0144] - Intra-system energy saving solution: A RAN node can request a neighboring RAN node to switch at least one SSB beam into its inactive cell, or can perform paging using a limited set of beams to an inactive terminal (e.g., a stationary terminal).

[0145] - Inter-system energy saving solution: NG-RAN nodes that own capacity booster cells can autonomously transition those cells to an inactive state.

[0146] - SSB-less SCell solution: If SSB or SMTC (SSB-based RRM measurement timing configuration) configuration is not provided for the SCell, the UE can obtain timing reference and AGC source from another serving cell. In FR1 or FR2, the base station can configure intra-band CA or inter-band CA including the SCell without SSB transmission, in which case the SSB / SIB transmission can be triggered by the WUS (wake-up signal) of the UE. Accordingly, since the period of common channels / signals such as SSB is increased, the base station can stay in the sleep state for a longer time.

[0147] - Cell DTX / DRX solution: In order to reduce the downlink transmission / uplink reception activity time of the base station, a periodic cell DTX / DRX pattern (e.g., active and inactive periods) can be commonly set for terminals within a cell having the corresponding feature. Here, the cell DTX pattern and the cell DRX pattern can be set and activated separately, and up to two cell DTX / DRX patterns can be set per MAC entity. When cell DTX is set and activated, at least one of monitoring for SPS opportunities or monitoring PDCCH can be stopped during the cell DTX inactivity period. When cell DRX is set and activated, at least one of transmission on CG resources or SR transmission can be stopped during the cell DRX inactivity period. Cell DTX / DRX can be activated / deactivated via RRC signaling or L1 group common signaling.

[0148] Parameters such as active duration and cycle may be configured for cell DTX / DRX. The active duration is the period during which the UE receives a PDCCH or SPS opportunity and waits to transmit SR or CG, and the cycle specifies the periodic repetition of the active duration and inactive duration. When both cell DTX and cell DRX are configured, parameters such as active duration and cycle are common. If the base station recognizes an emergency call or a public safety-related service (e.g., MPS or MCS), the network may release or deactivate the cell DTX / DRX configuration so as not to affect the service. In addition, at least some overlap is required between the active duration of the connected mode DRX of the UE and the active duration of the cell DTX / DRX. For example, the connected mode DRX cycle of the UE may be a multiple of the cell DTX / DRX cycle, or vice versa.

[0149] - Conditional handover (CHO) solution: A CHO procedure performed in a way that the execution of the handover is determined by the UE is used while the NES technology is applied (e.g., when the cell activates or deactivates cell DTX / DRX). In this case, the UE can use an NES-specific CHO event to initiate CHO for a candidate cell, and the reception of a DCI that activates the CHO condition(s) set by the NES event indication can be applied as an additional triggering condition for this.

[0150] - Spatial and power domain adaptation solution: To support the gNB for transceiver muting and / or transmit power adaptation, the UE may be configured to report multiple CSI entries in a CSI report based on multiple sub-configurations. Each sub-configuration corresponds to a spatial domain adaptation pattern (e.g., a subset of available spatial elements) and / or a power offset between a data channel (e.g., PDSCH) and CSI-RS. Depending on the application of the spatial and power domain adaptation solution, the CSI configuration, measurement, and / or reporting behavior may be affected.

[0151] In relation to the aforementioned NES, in the case of paging, paging frames (PF) and / or paging occasions (PO) were previously distributed along the time axis within a DRX cycle (or paging cycle), and the terminal attempted to receive paging at a specific PF / PO derived from its ID-based formula. From the base station's perspective, if paging was to be transmitted to multiple terminals simultaneously, the paging may have to be transmitted while waking up frequently. As a method for reducing the base station energy consumption resulting from this, methods may be considered to arrange the PF and / or PO for paging reception as close to the time axis as possible or to arrange different frequency resources within the same time.

[0152] Paging

[0153] The paging procedure is a procedure to switch a terminal to RRC connected mode when there is downlink data to be transmitted to a terminal in RRC idle / inactive state.

[0154] Figure 9 is an example diagram showing a paging procedure.

[0155] Referring to FIG. 9, when a base station receives a paging signal from a Mobility Management Entity (MME), the base station may transmit to the terminal a PDCCH (or MPDCCH or NPDCCH) having a CRC (cyclic redundancy check) scrambled with a P-RNTI (Paging Radio Network Temporary Identity). In addition, the base station may transmit to the terminal a PDSCH including a paging signal / message.

[0156] If the terminal successfully decodes a PDCCH (or MPDCCH or NPDCCH) with a CRC scrambled with P-RNTI, the terminal can decode a paging message via the PDSCH. Furthermore, the terminal can establish an RRC connection procedure to enter RRC connection mode.

[0157] Thus, in order for a terminal to receive a paging signal / message, it is necessary to monitor the PDCCH (or MPDCCH, or NPDCCH). However, if the monitoring cycle is short, the cycle in which the terminal performs blind decoding (BD) becomes shorter, which increases power consumption.

[0158] To reduce power consumption, the UE may use discontinuous reception (DRX) for paging in RRC idle / inactive state. The UE may monitor one paging opportunity (PO) per DRX cycle (e.g., paging cycle). A PO is a set of PDCCH monitoring opportunities and may consist of multiple time slots (e.g., subframes or OFDM symbols) in which paging DCI (e.g., PDCCH with CRC scrambled with P-RNTI) may be transmitted. A paging frame (PF) is a radio frame and may include one or more POs, or the starting points of POs.

[0159] In multi-beam operation, the length of one PO is one period of beam sweeping, and the terminal can assume that the same paging message is repeated on all beams of the entire pattern, and thus the beam selection for receiving the paging message is up to the terminal implementation. The paging message is the same for both RAN-initiated and CN-initiated paging.

[0160] After receiving RAN paging, the terminal initiates an RRC connection resume procedure. If the terminal receives CN-initiated paging while in the RRC inactive state, it transitions to the RRC idle state and reports the information to the NAS. The PF and PO are determined as follows:

[0161] The SFN for PF is determined by the following mathematical expression 3.

[0162]

[0163] The index (i_s) indicating the start of a series of PDCCH monitoring situations for paging DCI is determined by the following mathematical expression 4.

[0164]

[0165] If set, the PDCCH monitoring opportunity for paging can be determined based on paging-SearchSpace and firstPDCCH-MonitoringOccashionOfPO. Otherwise, the PDCCH monitoring opportunity for paging is determined based on the underlying association.

[0166] For a basic association, Ns is either 1 or 2. If Ns = 1, there is only one PO starting from the PF. If Ns = 2, the PO is in the first half-frame (i_s = 0) or the second half-frame (i_s = 1) of the PF.

[0167] For non-default connections (e.g., when paging-SearchSpace is used), the terminal monitors the (i_s + 1)th PO starting from the first PO in the PF. PDCCH monitoring opportunities for paging that do not overlap with uplink symbols are numbered consecutively from 0, starting from the first PDCCH monitoring opportunity for paging in the PF.

[0168] If firstPDCCH-MonitoringOccasionOfPO exists, the i_s + 1th PO is a set of 'S' consecutive PDCCH monitoring opportunities for paging starting from the PDCCH monitoring opportunity indicated by firstPDCCH-MonitoringOccessionOfPO (e.g., the i_s + 1th value of firstPDCCH-MonitoringOccessionOfPO). Otherwise, the i_s + 1th PO is a set of 'S' consecutive PDCCH monitoring opportunities for paging starting from the i_s*Sth paging PDCCH monitoring opportunity, where 'S' is the number of actually transmitted SSBs determined according to ssb-positionsInBurst of SystemInformationBlock1. The Kth PDCCH monitoring opportunity for paging in the PO corresponds to the Kth transmitted SSB.

[0169] The parameters used in the calculation of the above PF and i_s are as follows.

[0170] T: DRX cycle of the terminal. Here, if configured by RRC or a higher layer, T may be determined as the shortest value among the UE-specific DRX value and the default DRX value broadcast as system information. If the UE-specific DRX is not configured by RRC or a higher layer, the default value may be applied to T.

[0171] N: Total number of paging frames in T

[0172] Ns: Number of paging opportunities for one PF

[0173] PF_offset: Offset used to determine PF

[0174] UE_ID: 5G-S-TMSI mod 1024

[0175] Parameters N, Ns, first-PDCCH-MonitoringOccashionOfPO, PF_offset and length of default DRX cycle can be signaled in SIB1.

[0176] If the terminal does not have 5G-S-TMSI (e.g., if the terminal has not yet registered with the network), the terminal can use the default identification information where UE_ID = 0 in the mathematical expression related to PF and i_s.

[0177] In relation to the paging described above, terminals may use paging early indication (PEI) in RRC idle and RRC inactive states to reduce power consumption. If PEI settings are provided in the system information, terminals in RRC idle or RRC inactive states that support PEI (excluding terminals expecting MBS group notification) may monitor PEI using the PEI parameters in the system information according to the procedures described below.

[0178] If lastUsedCellOnly is set in the cell's system information, the terminal monitors PEI in the cell only if it most recently received RRCRelease without noLastCellUpdate from that cell. Otherwise (e.g., if lastUsedCellOnly is not set in the cell's system information), the terminal monitors PEI in the camped cell.

[0179] The UE monitors one PEI opportunity per DRX cycle. A PEI opportunity (PEI-O) is a collection of PDCCH Monitoring Opportunities (MOs) and may consist of multiple time slots (e.g., subframes or OFDM symbols) in which PEIs can be sent. In multi-beam operation, the UE assumes that the same PEI is repeated across all transmit beams, and therefore beam selection for PEI reception is dependent on the UE implementation.

[0180] The time position of a PEI-O with respect to a PO of a terminal is determined by a reference point and an offset. Here, the reference point is the beginning of a reference frame determined by a frame-level offset from the beginning of the first PF of the PF(s) associated with the PEI-O provided by pei-FrameOffset of SIB1. In addition, the offset is a symbol-level offset from the reference point provided by firstPDCCH-MonitoringOccasionOfPEI-O of SIB1 to the beginning of the first PDCCH MO of the corresponding PEI-O.

[0181] If one PEI-O is associated with POs of two PFs, the two PFs are consecutive PFs computed by parameters PF_offset, T, Ns, and N. The first PF of the PF associated with the PEI-O is given by (SFN of the PF) - floor (iPO / Ns)*T / N.

[0182] The PDCCH MO of PEI is determined based on pei-SearchSpace, pei-FrameOffset, firstPDCCH-MonitoringOccasionOfPEI-O, and nrofPDCCH-MonitoringOccasionPerSSB-InPO, if configured. If SearchSpaceId = 0 is configured for pei-SearchSpace, the PDCCH MO for PEI may be the same as RMSI. The UE determines the first PDCCH MO for PEI-O based on pei-FrameOffset and firstPDCCH-MonitoringOccasionOfPEI-O, similarly to the case where SearchSpaceId > 0 is configured.

[0183] If SearchSpaceId = 0 is set for pei-SearchSpace, the terminal monitors PEI-O according to searchSpaceZero. If SearchSpaceId is set for a non-zero pei-SearchSpace, the terminal monitors PEI-O according to the search space with the set SearchSpaceId.

[0184] A PEI opportunity is a set of 'S*X' consecutive PDCCH MOs, where 'S' is the number of actual transmitted SSBs determined by ssb-PositionsInBurst of SIB1 and X is nrofPDCCH-MonitoringOccasionPerSSB-InPO if set or 1 otherwise. In a PEI-O, the [x*S+K]th PDCCH MO for a PEI corresponds to the Kth transmitted SSB, where x=0,1,쪋,X-1 and K=1,2,쪋,S. The PDCCH MOs for a PEI that do not overlap with a UL symbol (determined by tdd-UL-DL-ConfigurationCommon) are numbered sequentially from 0, starting with the first PDCCH MO for a PEI in the PEI-O. Once a UE detects a PEI within a PEI-O, the UE does not need to monitor subsequent MOs associated with the same PEI-O.

[0185] If the terminal detects a PEI and the PEI indicates a subgroup to monitor for the associated PO, the terminal monitors the associated PO. If the terminal does not detect a PEI in a monitored PEI opportunity, or if the PEI does not indicate a subgroup to monitor for the associated PO, the terminal does not need to monitor the associated PO.

[0186] If the UE cannot monitor a PEI opportunity corresponding to a PO (e.g., all valid PDCCH MOs for the PEI) (e.g., during cell reselection), the UE monitors the associated PO. If the UE uses the same i_s as the RRC idle state in the RRC inactive state, the UE must use the same i_PO as the RRC idle state. Otherwise, the UE determines the i_PO according to a predefined formula.

[0187] In this regard, matters concerning subgroups can be defined as follows:

[0188] When PEI and subgrouping are configured, terminals monitoring the same PO can be divided into one or more subgroups. With subgrouping, a terminal monitors a PO if the corresponding bit of the subgroup to which it belongs is set to 1 by the PEI corresponding to that PO.

[0189] The parameters used to determine the subgroup ID may be:

[0190] - subgroupsNumPerPO: Total number of subgroups for CN-assigned subgrouping (if any) and UE_ID-based subgrouping (if any) in PO, broadcast in system information.

[0191] - subgroupsNumForUEID: Number of subgroups for UE_ID based subgrouping in PO, broadcast in system information.

[0192] Subgroups of terminals can be assigned by CN or formed based on UE_ID.

[0193] - If subgroupsNumForUEID is not present in subgroupConfig, the cell uses the subgroup ID based on the CN-assigned subgrouping if available to the terminal.

[0194] - If both subgroupsNumPerPO and subgroupsNumForUEID are configured and subgroupsNumForUEID has the same value as subgroupsNumPerPO, a subgroup ID based on UE_ID-based subgrouping is used in the cell.

[0195] - If both subgroupsNumPerPO and subgroupsNumForUEID are set and subgroupsNumForUEID < subgroupsNumPerPO:

[0196] -- If available to the terminal, a subgroup ID based on CN assignment subgrouping is used in the cell.

[0197] -- Otherwise, a subgroup ID based on UE_ID-based subgrouping is used in the cell.

[0198] If the terminal does not have a CN-assigned subgroup ID or does not support CN-assigned subgrouping and there is no setting for subgroupsNumForUEID, the terminal monitors the associated POs according to a pre-defined method.

[0199] Additionally, paging in extended DRX may also be considered.

[0200] The UE can be configured with extended DRX (eDRX) cycles TeDRX, CN and / or TeDRX, RAN by upper layers and / or RRC. The UE operates in eDRX for CN paging in RRC idle or RRC inactive state if eDRX is configured by upper layers and eDRX-AllowedIdle is signaled in SIB1. The UE operates in eDRX for RAN paging in RRC inactive state if eDRX is configured by RAN and eDRX-AllowedInactive is signaled in SIB1. If the UE operates in eDRX with an eDRX cycle that does not exceed 1024 radio frames, it monitors PO in a predefined manner with the configured eDRX cycle. Otherwise, the UE operating in eDRX monitors PO in a predefined manner during a periodic paging time window (PTW) configured for the UE. PTW varies across terminals and is determined by the paging hyperframe (PH), the starting position (PTW_start) and the ending position (PTW_end) within the PH. PH, PTW_start, and PTW_end are given as follows.

[0201] A PH of a CN is an H-SFN satisfying H-SFN mod T_(eDRX_CN) = (UE_ID_H mod T_(eDRX_CN)), where UE_ID_H is the 13 most significant bits of the hashed ID, and T_(eDRX_CN) is a UE-specific eDRX cycle of a hyperframe configured in a higher layer (T_(eDRX_CN) = 2, 쪋, 1024 hyperframes). PTW_start represents the first radio frame of a PH that is part of a PTW and has an SFN satisfying SFN = 128 * ieDRX_CN, where i_(eDRX_CN) = floor(UE_ID_H / T_(eDRX_CN)) mod 8. Furthermore, PTW_end is the last radio frame of a PTW and has an SFN satisfying SFN = (PTW_start + L*100 - 1) mod 1024. Here, L is the length of the paging time window (PTW) set by the upper layer (in seconds). In addition, the hashed ID is defined as the frame check sequence (FCS) for bits b31, b30, ..., b0 of the 5G-S-TMSI.

[0202] Paging for NES

[0203] In this disclosure, a method for setting a paging frame (PF) and a paging occasion (PO) is proposed by considering the aforementioned NES.

[0204] For clarity of explanation, in this disclosure, a terminal that supports NES (e.g., a terminal having NES-related capabilities) is referred to as an NES terminal, and a terminal that does not support NES is referred to as a legacy terminal.

[0205] A base station can provide PF / PO for terminals that wish to receive service in a specific cell / carrier through upper layer signaling (e.g., SIB, etc.). In this case, when the base station continuously sets PF / PO within a specific time period within a DRX cycle, paging only needs to occur and be transmitted in that period, so the NES effect can be improved. In this regard, a method of setting PF and / or PO for NES terminals (e.g., NES PF / PO) in different cells / carriers from PF and / or PO for legacy terminals, and / or a method of setting PF and / or PO for NES terminals in the same cell / carrier as PF and / or PO for legacy terminals can be considered.

[0206] Hereinafter, terminal and / or base station operations for setting PF / PO for NES terminals are described through specific embodiments. In the embodiments, PF may refer to PF for NES terminals, and PO may refer to PO for NES terminals.

[0207] Example 1

[0208] This embodiment relates to a method of sequentially arranging paging opportunities (POs) for each specific DRX cycle.

[0209] In other words, there are N paging frames (PF) within a particular DRX cycle (e.g., T frame), and there are N paging frames (PF) within a particular PF. s If POs are allocated, the base station will have a total of N*N s The POs of the dog can be set to be placed consecutively. In this case, N*N s The POs of a dog can be allocated consecutively starting from a specific point in time in a specific PF.

[0210] With respect to a specific PF, the PF index may be configured by the base station via higher layer signaling (e.g., SIB, etc.) (e.g., one of PF index 0 to N-1 is indicated), or may be configured / defined to rotate at an interval of index n every DRX cycle starting from PF index 0 (e.g., n=1). In addition, the PF index may be defined to be initialized to PF index 0 when a specific point in time (e.g., SFN 0) passes. Alternatively, one of PF index 0 to N-1 is pre-defined (e.g., the first PF index (0), or the last PF index (N-1)), and N*N PF indices are defined within the frame corresponding to the pre-defined PF index. s It can be defined that POs are arranged consecutively. In other words, if no separate information is provided from the base station, N*N OFDM symbols are arranged starting from the first OFDM symbol of the first slot of the frame corresponding to the PF index. s It can be defined that the POs of the dog are arranged sequentially.

[0211] Also, N*N within the frame corresponding to the PF index s The point in time at which POs are sequentially allocated may be set / indicated by the base station through upper layer signaling (e.g., SIB, etc.) or determined based on a previously indicated parameter value (e.g., 'firstPDCCH-MonitioringOccasionOfPO', the starting OFDM symbol position of the kth PO of the corresponding PF). At this time, information on the kth PO may also be set / indicated by the base station, rotated from 0 every DRX cycle, or pre-defined. Alternatively, N*N POs within the frame corresponding to the corresponding PF index sThe point at which POs are sequentially allocated can be predefined as a specific value (e.g., the first OFDM symbol). Alternatively, the number indicated by the existing parameter (e.g., 'firstPDCCH-MonitioringOccasionOfPO') can be increased compared to the existing one (e.g., N S N*N from dog - (Expanded to S) N*N- from the first OFDM symbol of the first slot of the frame corresponding to the PF index S The base station can be configured to directly indicate the starting OFDM symbol positions of the POs to the terminal. Alternatively, the parameter indicated previously (e.g., 'firstPDCCH-MonitioringOccasionOfPO') can be set to N as before. S If the starting OFDM symbol positions of the POs are indicated, N*N -S The first N of the POs S The PO of the dog determines the starting OFDM symbol based on the first OFDM symbol of the first slot of the frame corresponding to the PF index according to the value of the parameter (e.g., 'firstPDCCH-MonitioringOccasionOfPO') indicated by the base station, and the following (N-1)*N- S The PO of the dog is N S It can be set to be arranged sequentially starting from the OFDM symbol immediately following the point where the dog POs end.

[0212] If the above-mentioned parameter (e.g., 'firstPDCCH-MonitioringOccasionOfPO') is not provided by the base station, N*N OFDM symbols from the first slot of the frame corresponding to the PF index SThe POs can be defined to be arranged consecutively. Or, even if the corresponding parameter (e.g., 'firstPDCCH-MonitioringOccasionOfPO') is provided by the base station, the terminal ignores the corresponding parameter and starts N*N OFDM symbols from the first slot of the frame corresponding to the corresponding PF index. S A method to define the POs of a dog to be arranged consecutively may also be considered.

[0213] At this time, the SFN that can be the specific PF index mentioned above can be defined as an SFN that satisfies mathematical expression 5.

[0214]

[0215] Additionally, within a specific DRX cycle T frame, N*N PFs are set to the SFN determined in the aforementioned manner. s When the POs of the dog are set consecutively, the PO indices (e.g., i_s) of the N*Ns POs are {0, 1, 쪋, N*N s -1}, the PO index (e.g., i_s) that the terminal should monitor can be determined based on the UE-ID of the terminal as in mathematical expression 6.

[0216]

[0217] Additionally, the aforementioned method is N*N S This is for the case where the PF index to which POs are consecutively allocated is one within a DRX cycle, but an operation to set multiple PF indexes within a DRX cycle can also be considered. In this case, the number of POs to be consecutively allocated can also be set / defined to vary depending on the number of PF indexes. That is, N*N S If M PF indices to which POs are sequentially allocated are set within a DRX cycle, N*N s / M POs can be set to be allocated consecutively within the frame corresponding to each PF index. In this case, the method of setting / indicating each PF index is N*N. s The timing at which M POs are sequentially allocated can be applied similarly to the method described above in this embodiment.

[0218] For example, if M=2 is set, the two PF indices can be separately indicated by the base station, or the rules can be defined in advance. As a specific example, frames in which a total of N PFs can come in a specific DRX cycle T frame are determined, and the two PF indices can be determined in advance as the frames in which the first PF and the N / 2th PF can come among them. In addition, N*N S / 2 POs may be configured to be sequentially assigned to each of the two PF indices indicated / determined above. In addition, the positions of the M PFs indicated above may be defined to rotate at different DRX cycles.

[0219] Additionally or alternatively, a method for continuously setting POs for NES terminals (hereinafter referred to as NES POs) by improving the parameters defined previously may be considered. In the case of the existing method, among the parameters set / indicated by the base station in relation to paging, 'firstPDCCH-MonitioringOccasionOfPO' is a parameter that determines the starting OFDM symbols of different POs having the same order per PF at once.

[0220] Based on this, we propose a method to define the parameters so that they can be independently set / indicated for different PFs within each DRX cycle, so that POs with the same order per PF can have different starting OFDM symbols.

[0221] For example, if there are N PFs in a DRX cycle and 1 PO for each PF, if the start OFDM symbol value of the PO in the nth PF is set so that the PO can end immediately before the n+1th PF, and the start OFDM symbol value of the PO in the n+1th PF is set to 0, two POs belonging to different PFs can be set to be arranged consecutively.

[0222] Additionally, the range that the existing 'firstPDCCH-MonitioringOccasionOfPO' parameter value can indicate is defined so that it cannot exceed the next PF. Alternatively, for NES terminals, the value (e.g., range) that the value can indicate can be increased, or the restriction can be lifted so that multiple POs belonging to two or more PFs can be allocated consecutively.

[0223] The proposed method described above can be similarly applied not only when the search space ID (e.g., SearchSpaceID) is not 0, but also when the search space ID is 0. For example, when setting up an NES PO, the proposed method described above can be set to always be applied regardless of whether the search space ID is 0. Alternatively, when the search space ID is 0, other proposed methods(s) of the present disclosure for changing the PF location can be set to be applied.

[0224] Additionally or alternatively, if N PFs are allocated within a DRX cycle (e.g., T frame), the number of frames in which the PF is repeated (e.g., T / N frames) may be defined as a PF period. Based on this, a method of setting / indicating information on whether a PF is allocated for each PF cycle via an SIB in the form of an N-bit bitmap may be considered.

[0225] For example, if a DRX cycle (e.g., T) is 32 frames and N is 2, the PF cycle may be 16 (32 / 2) frames. In this case, the base station may use a 2-bit bitmap through SIB to set / indicate information on whether a PF is allocated to each of the two PF cycles. In another example, if a DRX cycle (e.g., T) is 32 frames and N is 16, the PF cycle may be 2 (32 / 16) frames. In this case, the base station may use a 16-bit bitmap through SIB to set / indicate information on whether a PF is allocated to each of the 16 PF cycles.

[0226] The terminal can check the corresponding bitmap information and, based on this, determine whether a PF has been allocated for each PF cycle. At this time, the terminal can be defined / configured to determine the PF index and PO index values ​​by distributing the UE_ID using the PO(s) to be transmitted to the allocated PF(s) through the corresponding bitmap.

[0227] Additionally, based on the aforementioned operation, if the base station sets only one PF to be set / allocated within a DRX cycle (e.g., a T frame), a method may also be considered in which the base station indicates only one specific PF index among N PF indices by using the ceil(log2N)-bit parameter to set the very first PF index of the DRX cycle to be indicated as state 0, the next PF index to be indicated as state 1, and the last PF index to be indicated as state N-1.

[0228] Example 2

[0229] This embodiment relates to a method of sequentially arranging paging frames (PF) for each specific DRX cycle.

[0230] In other words, when there are N PFs within a specific DRX cycle (e.g., T frame), a total of N PFs can be set to be sequentially placed in N frames. At this time, PO for each PF is N s Dogs can be assigned.

[0231] To this end, a method of independently and explicitly indicating a starting frame offset for multiple PFs within a specific DRX cycle may be considered. That is, when PFs are configured, the starting frame offset indicated by the base station for each PF may be applied so that N PFs are configured to be sequentially arranged in N frames.

[0232] Additionally or alternatively, the starting frame offset (or starting frame index) for each PF may be determined based on a pre-defined specific rule. That is, if multiple PFs are configured to exist consecutively, multiple POs are allocated within the nth PF, and the interval occupied by the POs is larger than one frame, the (n+1)th PF may be defined to start at the frame immediately following the frame in which the last PO of the previous PF ended. For example, the above-described rule may be applied in a situation where 64 SSB indices are allocated and / or a situation in which multiple POs per SSB are indicated (e.g., NR-U based).

[0233] Additionally or alternatively, the N PFs may be allocated / configured consecutively for N frames starting from a frame corresponding to a specific PF, or may be configured such that each PF is allocated at an interval of X frames starting from a frame corresponding to the specific PF. With respect to a specific PF, the PF index may be configured by the base station via higher layer signaling (e.g., SIB, etc.) (e.g., one of PF index 0 to N-1 is indicated), or may be configured / defined to be rotated by an interval of index n starting from PF index 0 (e.g., n=1) every DRX cycle. In addition, the PF index may be defined to be initialized to PF index 0 when a specific time point (e.g., SFN 0) passes. Alternatively, one of the PF indices 0 to N-1 is predefined (e.g., the first PF index (0) or the last PF index (N-1)), and N PFs are arranged consecutively starting from the frame corresponding to the predefined PF index, or each PF is allocated at an interval of X frames starting from the frame corresponding to the predefined PF index.

[0234] Additionally or alternatively, although the above-described method is for the case where there is only one PF index to which N PFs are consecutively allocated within a DRX cycle, an operation of setting multiple PF indexes within a DRX cycle may also be considered. That is, if M PF indexes to which N PFs are consecutively allocated are set within a FRX cycle, N / M PFs may be set to be consecutively allocated from the frame corresponding to each PF index. In this case, the methods of setting / indicating each PF index may be similarly applied, and the method may also be applied when PFs are allocated at X frame intervals.

[0235] Additionally, in the case of the existing method, the mathematical formula for determining the index of the paging frame according to the UE_ID is "(SFN + PF_offset) mod T = (T div N)*(UE_ID mod N)". At this time, as a proposed method, a method of replacing (T div N) in the formula with 1 and applying it in order to continuously assign the PF index can be considered. This can be defined as in mathematical formula 7.

[0236]

[0237] Alternatively, a new parameter (e.g., PF_gap) may be introduced to allow the base station to set the frame gap between PFs instead of the (T div N) value, and a method may be considered in which the base station sets / indicates the parameter / value through higher layer signaling (e.g., SIB, etc.). This may be defined as in Equation 8.

[0238]

[0239] In this regard, the parameter indicating the frame gap between PFs can be defined to have a value from a minimum of 1 to a maximum of (T / N). For example, PF_gap can be {1, 2, ..., (T / N)}. In this case, the parameter is not provided by the base station and can also be defined to indicate 1 or T / N.

[0240] Additionally, as described above, when multiple PFs are arranged consecutively or arranged at specific intervals (e.g., X frames), the range that the parameter indicating the start OFDM symbol of the PO (e.g., firstPDCCH-MonitioringOccasionOfPO) can indicate can be set to be reduced. For example, when each PF is arranged consecutively, the value that the parameter can have can always be determined on a per-frame basis regardless of the number of PFs in a DRX cycle. Specifically, in the case of 15 kHz SCS, the value can be {0, ..., 139} based on 140 OFDM symbols (e.g., 10 (slots) * 14 (OFDM symbols)). As another example, when each PF is arranged at an interval of X frames, the value that the parameter can have can be determined on a per-X frame basis. Specifically, for 15kHz SCS, the value can be {0, ..., 140*X-1} (where X is a positive integer), based on 140*X OFDM symbols (e.g., X(frame)*10(slot)*14(OFDM symbol)).

[0241] Additionally, even if PFs are spaced X frames apart, they are still in separate Y frames (e.g. Y <X) 값을 정의하며, 해당 PF 내에 할당된 PO들의 시작 OFDM 심볼을 지시하는 파라미터(예를 들어, firstPDCCH-MonitioringOccasionOfPO)가 지시해줄 수 있는 값을 Y 프레임을 기준으로 결정하는 방법이 고려될 수 있다.

[0242] For example, if one PF is deployed within each DRX cycle, the X value may be a DRX cycle (e.g., T frame), and the Y value may be defined as a specific value less than the X value (e.g., T value). Specifically, for 15kHz SCS, the values ​​that can be indicated by the parameter may be {0, ..., 140*Y-1} (where Y is a positive integer), based on 140*Y OFDM symbols (e.g., Y(frame)*10(slot)*14(OFDM symbol)).

[0243] In this regard, the Y value may be separately set / indicated by the base station through upper layer signaling, and may also be determined according to specific rules.

[0244] As an example of a specific rule, in the NES paging configuration (e.g., paging configuration for NES terminals) directed by the base station, the PO value per PF (e.g., N s value) is set to N in legacy paging settings (e.g. paging settings for legacy terminals). s If the value Y is N times the maximum value that can be indicated by the value (e.g., 4), then the value Y can be defined as X / N (or X / 2N, or X / 4N, etc.).

[0245] As a concrete example, N is indicated through the NES paging settings. s If the value is 8, then N is 2, so the Y value can be X / 2 (or X / 4, or X / 8, etc.). Alternatively, N can be specified via the NES paging settings. s If the value is 16, then N is 4, so the value of Y can be X / 4 (or X / 8, or X / 16, etc.).

[0246] Also, as another example of a specific rule, if one PF is allocated within a DRX cycle according to the parameters indicated via NES paging, i.e., if T / N is 1, then Y can be defined as X / 2 (or X / 4, or X / 8, etc.). Since X is T, Y can be T / 2 (or T / 4, or T / 8, etc.).

[0247] Additionally or alternatively, the PF interval (e.g., T / N) may be determined according to parameters indicated in the legacy paging configuration, and the Y value may be defined to be determined by the T / N value of the legacy paging configuration. As a specific example, if the DRX cycle (e.g., T) is 256 frames and 1 / N is indicated as 1 / 16 according to the legacy paging configuration, the PF inter-interval T / N may be defined to be 16 frames, and the corresponding value may be used as the Y value.

[0248] Additionally or alternatively, the Y value may be defined to be determined as a T / M value based on a DRX cycle (e.g., T) value of the NES paging configuration (or legacy paging configuration) and an M value separately indicated through the NES paging configuration. As a specific example, if the DRX cycle (e.g., T) is 256 frames and 1 / N is indicated as 1 / 32 according to the NES paging configuration (or legacy paging configuration), the T / M interval between PFs is 8 frames, and the corresponding value may be defined to be used as the Y value.

[0249] Additionally or alternatively, when N PFs are arranged consecutively within a specific DRX cycle or N PFs are arranged with a specific interval (e.g., X frames), the position of an opportunity for paging early indication (PEI) (e.g., PEI-O) may be defined to determine a start frame offset from the earliest PF among the N PFs. In this case, information included in the DCI for PEI (e.g., PEI DCI) may be defined to include the information for all POs included within the N PFs and the UE group(s) corresponding to the POs.

[0250] Additionally or alternatively, when N PFs are arranged consecutively, N PEI-Os may be defined to be independently determined for each PF. At this time, the positions of the N PEI-Os may be defined to be set by applying a (common or independent) starting frame offset from each of the N PFs. For example, when PFs are set at frame index #K, frame index #K+1, and frame index #K+2, respectively, it may be defined that PEI monitoring opportunities exist at frame index #(K-PF_offset#1), frame index #(K+1-PF_offset#2), and frame index #(K+2-PF_offset#3).

[0251] Additionally or alternatively, if N PFs are arranged consecutively (different from the positions of legacy PFs), the terminal and / or base station may be defined to determine a new PEI monitoring opportunity according to an existing configuration method based on the changed PF positions. That is, a PO per new PEI may be indicated as one of {1, 2, 4, 8}, and if POs belonging to at most two consecutive PFs can be allocated to the PEI, an operation may be applied in which a PEI monitoring opportunity is determined at a position obtained by applying a frame offset provided by the base station from the earliest PF among the PFs associated with the PEI.

[0252] Example 3

[0253] The present embodiment relates to a method for setting a PO monitoring opportunity in a case where paging frames (PF) and / or paging opportunities (POs) are sequentially placed for each specific DRX cycle.

[0254] In this regard, a case may be considered where PFs are placed in consecutive frames within a specific DRX cycle, and multiple POs are set within each PF. In other words, when N PFs exist within a specific DRX cycle (e.g., T frame), a total of N PFs are set to be placed consecutively in N frames, and N POs are set for each PF. s You can set the PO of the dog to be assigned.

[0255] At this time, if one or more POs assigned to the k-th PF do not all end within a specific SFN set / indicated by the k-th PF and invade one or more subsequent SFNs, it is necessary to define where the first PO of the k+1-th PF should start.

[0256] If one or more POs assigned to the k-th PF all end within a specific SFN (e.g., SFN X) set / indicated by the k-th PF, the first PO among the one or more POs assigned to the k+1-th PF can be defined to start in the first slot of the specific SFN (e.g., SFN Y) set / indicated by the k+1-th PF. On the other hand, if one or more POs assigned to the k-th PF do not all end within the specific SFN (e.g., SFN X) set / indicated by the k-th PF and invade the specific SFN (e.g., SFN Y) set / indicated by the k+1-th PF, the first PO among the one or more POs assigned to the k+1-th PF can be defined to start in the OFDM symbol immediately following the OFDM symbol in which the last PO assigned for the k-th PF ended (or in the slot immediately following the slot in which the last PO ended).

[0257] In other words, if one or more POs allocated for a specific PF are set within a frame, each of the consecutive frames can be defined as being utilized as a PF, and the POs allocated to each PF can be defined as being allocated within the frame. If one or more POs allocated for a specific PF are not set within a frame, each of the consecutive frames can be defined as being utilized as a PF, but the actual POs can be defined as being allocated consecutively at the PO level.

[0258] Alternatively, if one or more POs assigned to the kth PF do not all end within a specific SFN (e.g., SFN X) set / indicated as the kth PF and invade a specific SFN (e.g., SFN Y) set / indicated as the k+1th PF, the starting position of the first PO among the one or more POs assigned to the k+1th PF can be set to shift by a specific time offset from the starting point of SFN Y.

[0259] At this time, the time offset value can be set at the OFDM symbol level, slot level, and / or (half) frame level. In addition, the time offset value can be set / indicated by the base station, and may be a value defined in advance depending on whether PF / PO is arranged. In addition, at this time, the maximum value of the time offset value needs to be defined / regulated so that the PO arranged using the time offset does not overlap with the SSB burst that follows (for example, is set / transmitted after the PO when the time offset is not applied to the PO). For example, the maximum value may mean the maximum value among the time offsets that do not overlap with the SSB burst when the time offset is applied to the PO. Meanwhile, the setting of a time offset value exceeding the maximum value may not be expected by the terminal, or if a time offset value exceeding the maximum value is set, the terminal may assume that the PO overlapping with the SSB burst is not set, or may omit the monitoring / reception operation for the PO.

[0260] Although the proposed method(s) described above primarily consider the case where the search space ID (e.g., SearchSpaceID) is 0, the proposed method(s) described above may also be applied when the search space ID is not 0 and the firstPDCCH-MonitoringOccasionOfPO parameter is not set.

[0261] Example 4

[0262] This embodiment relates to a method of setting only one paging frame (PF) within a specific DRX cycle.

[0263] In the conventional method, when a DRX cycle (e.g., T frame) is set, the number of PFs (e.g., N) per cycle is set to "oneSixteenthT", so that PFs can be set for T / 16 frames per T frame of the cycle. However, since the minimum value of T is 32 frames, the lowest PF density is when 2 PFs are set per 32 frames. In addition to this situation, if the base station can allocate a smaller number of PFs per T frame of the cycle, it can be set so that there is 1 PF per T frame of the cycle.

[0264] For example, a "oneThirtysecondT" value may be additionally introduced. In this case, assuming the T value is 32, it may be defined so that one PF can be set per 32 frames. Also, as another example, a "oneSixtyfourthT" value may be additionally introduced. In this case, assuming the T value is 64, it may be defined so that one PF can be set per 64 frames. Specifically, since PF must be set per frame, the UE may be defined to expect that the number of PFs (e.g., N) per DRX cycle (e.g., T frame) is always set to be greater than or equal to 1.

[0265] However, as described above, when the number of PFs per T frame is set to 1, it can be defined to maintain a PO density similar to that of the existing method (e.g., legacy NR system) by additionally setting POs within the PF. In other words, in the case of the existing method, since at least 2 PFs can be provided per DRX cycle T frame and at least 1 PO can be provided per PF, as a result, at least 2 POs can be provided per DRX cycle T frame. Accordingly, when the number of PFs (e.g., N) per cycle T frame is set to 1 as in the example described above, the NES terminal can set the number of POs per PF (e.g., N s ) can be defined to always be set to be greater than or equal to a specific value X (e.g., X=2). That is, if the number of PFs per period T frame (e.g., N) is set to 1 as in the example described above, the NES terminal expects the number of POs per PF (e.g., N s ) can be defined so that it is not expected to be directed to a specific value Y (e.g., Y=1).

[0266] Additionally, in the existing method, an operation is used to calculate the number of PFs (e.g., N) per DRX cycle (e.g., T frame) using multiple parameters set / indicated by the base station. For example, the base station may set / indicate a T value and set / indicate a nAndPagingFrameOffset value such as T / 16 or T / 8. However, in the case of setting / indicating in this way, even if the base station sets / indicates the nAndPagingFrameOffset value to the smallest value, there is a disadvantage in that when the T value increases, the number of PFs (e.g., N) per DRX cycle (e.g., T frame) also increases.

[0267] Therefore, instead of calculating the number of PFs N per DRX cycle based on these two parameters, a method in which the base station directly indicates the number of PFs per DRX cycle (regardless of the DRX cycle value) may be considered. The number of PFs may be a positive integer less than or equal to the configured / indicated DRX cycle (e.g., T frame), and in particular, considering the NES effect, the number of PFs may be set to 1.

[0268] For example, by indicating "one" or "single" in the "nAndPagingFrameOffset" parameter in the PCCH configuration (e.g., PCCH-Config) in the SIB (e.g., DownlinkConfigCommonSIB), the base station can indicate that the number of PFs is 1 within a specific DRX cycle. In addition, since the paging frame offset value needs to be variably determined according to the DRX cycle (e.g., T frame) set / indicated by the base station, the base station can be defined to select an integer value from 0 to T-1 and indicate it as the paging frame offset value. In this case, the T value means the number of frames corresponding to the DRC cycle set / indicated by the base station.

[0269] Based on the proposed method, the "nAndPagingFrameOffset" related items can be newly defined based on one or more of Tables 6 to 8.

[0270]

[0271] As shown in Table 6, for "nAndPagingFrameOffset", it can be defined to include a value indicating "one" or "single" within the existing parameter.

[0272]

[0273] As shown in Table 7, for "nAndPagingFrameOffset", it can be set / indicated separately from the existing parameters, by defining a value indicating "one" or "single" in addition to the existing values.

[0274]

[0275] As shown in Table 8, terminal operation and / or base station operation can be newly defined when a value indicating “one” or “single” is set / indicated.

[0276] Additionally, in the existing case, the number of POs per PF is n s can be set / indicated as one of {four, two, one} through the parameter of n. However, in the case of the proposed method of the present disclosure, since the number of PFs per DRX cycle is reduced, it is necessary to increase the number of POs per PF. For example, n s {eight, sixteen, thirty-tow} can be additionally defined as parameter values ​​for {four, two, one}. In this case, n s Additional values ​​(e.g., eight, sixteen, thirty-two, etc.) other than the existing defined values ​​for parameter values ​​can be configured / indicated only when the number of PFs (e.g., N) per DRX cycle (e.g., T frame) is set to 1, and the UE can expect them to be configured / indicated only in this case. Consequently, the base station can configure / indicate the total number of POs to be allocated to a DRX cycle (e.g., T frame) to be maintained at a similar level to the PO density per DRX cycle that can be configured through legacy configuration (e.g., legacy paging configuration) based on the proposed methods described above.

[0277] Example 5

[0278] This embodiment relates to a method for setting multiple DRX cycles within a specific paging configuration.

[0279] In the conventional case, the base station defines N PFs within a specific DRX cycle (e.g., T frame) through paging settings, and N PFs are allocated for each PF. s You can set / instruct / define the PO of the dog. Here, you can instruct multiple DRX cycles within a specific paging configuration, so that a specific DRX cycle (e.g., T a The density of POs that the terminal must monitor in a frame and other DRX cycles (e.g., T b In the frame, the density of POs that the terminals should monitor can be set / instructed / defined to be different from each other.

[0280] For example, two DRX cycles are set, and T a =32 frames, T b =64 frames are indicated, the number of PFs per cycle (e.g., N) is indicated as "oneSixteenthT", and the number of POs per PF (e.g., N s ) is considered as indicated by 1. In this case, T a In the section, there are a total of two POs per 32 frames, and a specific terminal can monitor one of the two POs. In addition, T b In the section, there are a total of 4 POs per 64 frames, and a specific terminal can monitor one of the 4 POs.

[0281] In this regard, the base station may set multiple DRX cycles and may set / provide information about bitmap information or patterns occupied by each DRX cycle to the terminal in advance through upper layer signaling, etc. In this case, the terminal may determine how the multiple DRX cycles are arranged based on the information and may be defined to monitor the PO corresponding to / corresponding to the UE_ID.

[0282] While the base station can set the proposed methods described in this disclosure separately, it can also apply one or more of the proposed methods simultaneously in combination. For example, paging frames can be arranged in consecutive frames, resulting in consecutive paging opportunities.

[0283] Additionally, with respect to the proposed methods of the present disclosure, applicable terminal operations and base station operations when setting up NES PF and / or NES PO in the same cell / carrier as legacy PF and / or legacy PO for legacy terminals may be as follows.

[0284] For example, the base station may configure the legacy PF / PO using the legacy paging configuration, and the NES PF / PO may be configured using the NES paging configuration to be allocated from the frame / slot / symbol immediately following the pre-configured legacy PF / PO. In this case, the aforementioned proposed methods for configuring the NES paging may be applied.

[0285] For another example, a method may be considered in which the base station sets / indicates a relative time offset (e.g., the offset for PF is a frame-level value, and the offset for PO is an OFDM symbol-level value) with respect to the legacy PF / PO to set the NES PF / PO. The time offset may be defined to be applied with respect to the frame start point or OFDM symbol start point of the legacy PF / PO. At this time, a method in which the base station independently indicates the time offset for each legacy PF / PO may be considered. If the base station sets / indicates the time offset for a specific legacy PF / PO to 0, or does not set / indicate the time offset for a specific legacy PF / PO, the corresponding NES PFPO may be defined not to be set. At this time, the NES terminal may be defined to separately distribute / allocate UE_ID only for the NES PF / PO(s) to determine the paging frame index and PO index values. In this case, the NES terminal may be defined to monitor only the NES PO mapped to the corresponding UE_ID, or may be defined to monitor both the legacy PO and the NES PO matched to the corresponding UE_ID. Alternatively, the NES terminal may be defined to distribute / allocate the UE_ID targeting the union of the legacy PF / PO and the NES PF / PO to determine the paging frame index and PO index values.

[0286] As another example, in a method where a base station obtains energy saving by puncturing some PF / PO sections within a DRX cycle (e.g., T frame), the NES terminal can be defined to determine the paging frame index and PO index values ​​by distributing / allocating UE_ID based on the remaining PF / PO(s) excluding the punctured PF / PO (or based on the PF / PO(s) included in a specific section / window in which the base station promises to transmit the PF / PO within the DRX cycle T frame).

[0287] In addition, when the UE_ID of the NES terminal is assigned to a specific legacy PO and a specific NES PO within a specific DRX cycle (e.g., a T frame), a method needs to be defined for determining whether the NES terminal monitors both POs or which PO among the two. For this purpose, a limit may be set for the number of times the NES terminal monitors a search space for paging (e.g., a Type 2 PDCCH common search space) during a specific DRX cycle (e.g., a T frame). For example, the NES terminal may be restricted to monitor the Type 2 PDCCH common search interval only once during a DRX cycle (e.g., a T frame). Alternatively, a limit may be set for the number of times the NES terminal receives a DCI format CRC-scrambled with one or more RNTIs (e.g., a P-RNTI and / or a NES-P-RNTI, etc.) during a specific DRX cycle (e.g., a T frame). For example, a NES terminal may be configured to receive a DCI format CRC scrambled with P-RNTI at most once during a specific DRX cycle (e.g., T frame).

[0288] In the proposed methods of the present disclosure, a DRX cycle (e.g., T frame) can be interpreted as starting from a frame satisfying SFN mod T=R (e.g., R=0) and up to a total of T frames. In this case, the T frame can be defined as a value that is cell common. In addition, the PF index can be defined as being mapped in ascending order from the frame where the corresponding DRX cycle starts. In addition, the PO index can be defined as being matched in ascending order from the PO existing in the frame corresponding to a specific PF.

[0289] Example 6

[0290] This embodiment relates to a method for dynamically switching the paging settings to be used by a base station using multiple paging settings.

[0291] The method(s) described in this embodiment may be applicable to one or more of the proposed methods described above in the present disclosure (e.g., Embodiments 1 to 5).

[0292] In the conventional method, the base station manages terminal paging signaling in a specific cell / carrier using a single paging configuration (e.g., PF / PO configuration) semi-statically. In this case, the PO density can be determined semi-statically.

[0293] In this regard, for NES terminals, a method for variably changing PO density at a specific point in time may be considered. To this end, a method is proposed in which a base station assigns multiple paging configurations to specific cells / carriers. For example, when multiple paging configurations are introduced, the base station assigns a T value for a DRX cycle, an N value for the number of PFs per T frame of a DRX cycle, and an N value for the number of POs per PF for each paging configuration. s The value 'firstPDCCH-MonitioringOccasionOfPO' for the starting OFD symbol position of each PO can be independently set / indicated.

[0294] As a first method, an operation may be defined in which a base station provides multiple paging configurations and dynamically configures / instructs the terminal (e.g., via DCI) which paging is used at a specific time. For example, a method may be considered in which the base station dynamically instructs the terminal by utilizing DCI (e.g., DCI format 2-7 CRC-scrambled by PEI-RNTI) that indicates PIE information regarding which paging configuration (e.g., PF / PO pattern) is applied / used at a specific time. Since this is a method in which the base station directly indicates the size of the corresponding DCI format 2-7, it can be defined to add as many bits as necessary to match the multiple paging configuration indexes. For example, 1 bit may be added to indicate one of two paging configurations.

[0295] As a second method, the terminal and base station are defined to use the default paging configuration, and then, at a specific point in time, after additional paging configuration information is provided, an action can be defined to dynamically set / instruct the terminal (e.g., via DCI) when to apply the additional paging configuration. For example, the base station may consider a method in which the terminal dynamically instructs the terminal whether an additional paging configuration (e.g., PF / PO pattern) will be applied / used at a specific point in time by using DCI (e.g., DCI format 2-7 CRC scrambled by PEI-RNTI) that indicates the PIE. In this case, a 1-bit field can be added to DCI format 2-7 to indicate whether to turn the additional paging configuration on / off. The terminal receives the on / off field value, and if the additional paging configuration is turned on, the terminal can be defined to apply the additional paging configuration instead of the default paging configuration from that point on. On the other hand, if the additional paging setting is turned off, the terminal can be defined to understand that the existing default paging setting will continue to be used. Additionally, the base station can configure the duration of the additional paging setting through a validity duration, validity window, timer, cycle, etc., or a method of deactivating it (e.g., setting it to off) through DCI (e.g., DCI format 2-7) can also be considered.

[0296] Thirdly, a PF bitmap field or a PO bitmap field can be configured so that the base station can turn on / off PFs / POs for each of multiple paging configurations. For example, the PF bitmap can be configured with N bits for N PFs within a specific DRX cycle (e.g., a T frame). In another example, the PO bitmap can be configured with N*N bits for N PFs within a specific DRX cycle (e.g., a T frame).s N*N for PO of the dog s Bit or, N within a specific PF s N for PO of dog s - can be composed of bits. The information can be defined so that the base station can dynamically indicate to the terminal using CG DCI. For example, DCI indicating PEI (e.g., DCI format 2-7 CRC scrambled by PEI-RNTI) can be utilized, and additional CG DCI and / or additional RNTI values ​​can be introduced. At this time, the PF / PO bitmap can be applied to all of the multiple paging configurations, but it can also be considered to apply it only to the additional paging configuration and not to the default paging configuration, so that some PF / PO or all PF / PO of the additional paging configuration can be turned on / off through the PF / PO bitmap. At this time, the NES terminal can be defined to separately distribute / allocate UE_ID only for the additional PF / POs to determine the paging frame index and PO index values. In this case, the NES terminal may be defined to monitor only the additional PO corresponding to / matched with the corresponding UE_ID, or may be defined to monitor both the legacy PO and the additional PO corresponding to / matched with the corresponding UE_ID. Alternatively, the NES terminal may be defined to determine the paging frame index and PO index values ​​by distributing / assigning the UE_ID targeting the union of the legacy PF / PO and the additional PF / PO.

[0297] Another method may be considered, after the base station provides multiple paging settings, to set / configure a pattern of a time interval to which each paging setting is applied, such as a bitmap. For example, assuming that two paging settings are set, the bitmap field value may be defined to indicate the interval occupied by the first paging setting index (e.g., the first PO / PF pattern) as 0, and to indicate the interval occupied by the second paging setting index (e.g., the second PO / PF pattern) as 1. At this time, the bitmap may be defined as 1 bit per DRX cycle (e.g., T frame), or 1 bit may be defined by grouping L DRX cycles (e.g., L*T frame, where L is greater than or equal to 1). The terminal may receive the bitmap field information to be instructed which paging setting is set in the time interval, and may perform PO monitoring based on the bitmap field information. In this case, a dynamic instruction method may also be considered, for example, DCI (e.g., DCI format 2-7) that schedules / instructs PEI may be utilized.

[0298] Additionally or alternatively, since the UE may experience problems in operation if it fails to receive dynamic instructions related to paging configuration from the base station when the UE is in an RRC idle / inactive state, it is necessary to define UE operations applicable to such situations. For example, a method may be defined in which the base station repeatedly provides dynamic instructions related to paging configuration for a certain period of time before actually applying them. As another example, it may be defined that multiple paging configurations each have PF / PO(s) allocated to the same frame / slot / symbol, and that the UE may select and monitor any of the multiple paging configurations without any problems in receiving paging.

[0299] Additionally or alternatively, when the NES paging configuration is indicated via SIB separately from the legacy paging configuration, a method of indicating activation / deactivation for the NES paging configuration with a legacy paging DCI (e.g., DCI format 1_0 CRC scrambled with P-RNTI) may be considered. At this time, activation / deactivation for a RACH occasion (RO) (e.g., NES PO) for the NES may also be considered using the legacy paging DCI. For this purpose, a 1-bit field for activating / deactivating NES RO may be introduced within the legacy paging DCI, and a method of additionally introducing a 1-bit field for activating / deactivating NES PO within the legacy paging DCI independently of this may be considered. This method has the advantage that the base station can independently enable / disable NES PO and NES RO, but has the overhead of adding a 2-bit field to the legacy paging DCI. Therefore, a method may be applied in which the base station simultaneously indicates enable / disable NES PO along with enable / disable NES RO by defining a 1-bit field in the legacy paging DCI. Additionally, when the NES paging configuration is indicated through SIB separately from the legacy paging configuration, a method may also be applied in which enable / disable NES paging configuration is indicated with a specific DCI (e.g., DCI format 1_0 CRC-scrambled with SI-RNTI).

[0300] In connection with the proposed methods of the present disclosure, the method for activating / deactivating NES paging settings may be based on one or more of the following methods.

[0301] First, a method may be considered in which a fixed SFN interval (e.g., modification period) is set / indicated, and the base station sets / indicates activation / deactivation of NES paging settings for each interval. Specifically, when activation / deactivation of NES paging settings is indicated using SIB, DCI (e.g., DCI for paging, DCI for PEI, DCI for SI modification, etc.), a method may be considered in which a separate 1-bit is used to indicate when the actual NES PO is activated / deactivated (e.g., the start or end of the corresponding modification period) by considering the current modification interval in which the corresponding information is indicated. Alternatively, the terminal may be defined to determine the timing of activation / deactivation by considering the corresponding parameters. Alternatively, it may be defined to apply (almost immediately) the activation / deactivation, taking into account the processing time of the terminal (which may be predefined or set, for example, as X symbol / slot / subframe / frame values) at the time the base station indicates the corresponding information. For example, the time point for applying the activation / deactivation may be X hours after the start / peer slot / symbol in which the corresponding indicator, such as SIB / DCI, is transmitted. Alternatively, it may be defined in advance to be activated / deactivated at the start (or end) of the modification interval at which the activation / deactivation is indicated, without a separate 1-bit indication from the base station. Alternatively, if activation / deactivation of the NES paging setting is indicated via legacy PEI DCI, it may be defined that the NES paging setting is activated at least after the time interval in which the legacy POs corresponding to the legacy PEI DCI are located, if the NES paging setting is indicated as being activated via the legacy PEI DCI.For example, one can define that the NES paging setting is enabled from the time period corresponding to the next legacy PEI DCI (or from the start of the next legacy RX cycle, or from the next SFN #0).

[0302] Next, a method of defining activation / deactivation of NES paging settings based on a timer may also be considered. For example, a timer indicating whether NES paging settings are activated / deactivated may be introduced. Specifically, activation of the NES paging settings may be indicated by starting (or restarting) the timer. Alternatively, if the base station instructs activation of the NES paging settings, the timer may be defined to start (or restart) from the time the activation is instructed. Additionally, deactivation of the NES paging settings may be indicated by the expiration of the timer. As a specific example, a specific 2-bit field may be used in SIB, DCI (e.g., DCI for paging, DCI for PEI, DCI for SI modification, etc.). At this time, a 1-bit field may indicate whether the timer is to be started (or restarted), and the remaining 1-bit may indicate whether the timer has expired at the time the information is indicated (e.g., whether the NES paging setting is enabled or disabled).

[0303] Additionally, activation of the NES paging configuration is not defined separately, but can be defined as being activated by transmitting the NES paging configuration via SIB. Thereafter, when the base station does not want to use the NES paging configuration during a specific time period, it can separately set / indicate only information for deactivation. At this time, the deactivation can be set / indicated by not transmitting the NES paging configuration via SIB. Alternatively, the deactivation can be separately indicated using 1 bit in SIB, DCI (e.g., DCI for paging, DCI for PEI, DCI for SI modification, etc.), etc. In this case, similar to the proposed method described above, the actual deactivation time can be indicated by the base station using 1 bit separate from the 1 bit indicating deactivation, or the actual deactivation time can be predefined or determined by the terminal.

[0304] In the proposed methods described above, even if the activation / deactivation of the NES paging configuration is indicated by DCI (e.g., DCI for paging, DCI for PEI, DCI for SI modification, etc.), whether the NES paging configuration is activated / deactivated at the current point in time can be set / provided by the base station using a separate 1-bit parameter via SIB1. For example, a specific 1-bit indicator (e.g., indicator A) can be defined to indicate whether the NES paging configuration is activated / deactivated from the next or future determined SIB modification interval, and a separate 1-bit indicator (e.g., indicator B) can be defined to indicate whether the NES paging configuration is activated / deactivated within the current SIB modification interval. In this case, indicator A can be transmitted in the same DCI (or container) as indicator B, and indicator B can be transmitted in DCI, etc. Additionally, when the activation / deactivation of NES paging settings is indicated via the short message field of the paging DCI, an additional notification 1-bit that only NES terminals can check may be introduced to prevent legacy terminals from performing unnecessary monitoring. In other words, it may be defined that only NES terminals check for SIB modifications via the notification 1-bit, and other terminals (e.g., legacy terminals) do not additionally check the SIB.

[0305] In connection with the methods described above, an additional N-bit field within the legacy paging DCI (e.g., DCI format 1_0 CRC-scrambled with P-RNTI) may be defined based on one or more of the following methods. First, N bits of the short message field occupying 8 bits within the legacy paging DCI may be utilized. Second, a combination of the short message indicator field occupying 2 bits within the legacy paging DCI field and other field(s) may be considered. For example, a Short Message Indicator field value of '00' may be defined to indicate how to utilize N bits among the remaining reserved bits, a Short Message Indicator field value of '01' may be defined to indicate how to utilize N bits among the Short Message field, and a Short Message Indicator field value of '10' may be defined to indicate how to utilize N bits among the FDRA / TDRA / VRB-to-PRB Mapping / MCS / TB Scaling fields. As another example, a method of utilizing N bits after a TRS availability indication field among the reserved bits may be defined. Additionally, a method of utilizing N bits among the TDRA / VRB-to-PRB Mapping / MCS / TB Scaling fields may be defined when FDRA is set / indicated to an invalid value.

[0306] Additionally, additional N-bit fields may be defined within a specific DCI (e.g., DCI format 1_0 CRC scrambled with SI-RNTI). For example, it may be defined to utilize N-bits of a reserved field within DCI format 1_0 CRC scrambled with SI-RNTI. Alternatively, it may be defined how to utilize N-bits of TDRA / VRB-to-PRB mapping / MCS / redundancy version / system information indicator / reserved field when FDRA within DCI format 1_0 CRC scrambled with SI-RNTI is set / indicated to an invalid value.

[0307] FIG. 10 and FIG. 11 illustrate terminal operations and base station operations in relation to signaling methods related to performing paging according to embodiments of the present disclosure described above.

[0308] FIG. 10 is a diagram for explaining the operation of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0309] Referring to FIG. 10, the terminal can receive setup information for paging from the base station (S1010).

[0310] For example, the configuration information can be transmitted and received via higher layer signaling (e.g., SIB, etc.).

[0311] Additionally, the terminal may support capability information related to network energy saving. In this case, the configuration information may be configured independently from the paging configuration information for terminals that do not support capability information related to network energy saving.

[0312] The terminal can perform monitoring for at least one paging opportunity within a paging frame based on the corresponding setting information (S1020).

[0313] In this regard, the configuration information in step S1020 may include a parameter (e.g., nAndPagingFrameOffset in PCCH-Config) for deriving the number of paging frames within a cycle related to paging (e.g., a DRX cycle or a paging cycle). At this time, the parameter may be defined to enable setting a single paging frame during the cycle related to paging. That is, the parameter may be set to a value for setting only one paging frame within the cycle related to paging.

[0314] For example, the predefined candidate values ​​of the parameter are defined as values ​​obtained by dividing the cycle by 2^n, where n can be a positive integer including 0. In this case, if the cycle can be set to a length greater than or equal to 32 frames, the predefined candidate values ​​of the parameter can include at least one value (e.g., T / 32, T / 64, etc.) indicating that one paging frame is set per unit exceeding 32 frames.

[0315] Additionally, the configuration information may contain other parameters for the number of paging opportunities within a paging frame (e.g., N in PCCH-Config). s Parameters) may be further included. In this case, when the aforementioned parameter is set to a value that sets a single paging frame during the cycle, the other parameter may be set to a value greater than or equal to a specific value (e.g., 2). In this regard, the pre-defined fubo values ​​of the other parameter include {1, 2, 4} and may further include at least one of {8, 16, 32}.

[0316] Additionally, according to the present disclosure, the terminal can receive information about the interval between paging frames from the base station, in which case the index of the paging frame can be indexed based on the information.

[0317] Additionally, according to the present disclosure, when a base station provides multiple configuration information for paging to a terminal, the terminal may receive information from the base station regarding the configuration information to be used at a specific point in time among the multiple configuration information. In this case, the information may correspond to bitmap information regarding the pattern of the time interval to which each configuration information is applied.

[0318] The method described in the example of FIG. 10 can be performed by the first device (100) of FIG. 12. That is, the terminal of FIG. 10 can be implemented as the first device (100). For example, one or more processors (102) of the first device (100) of FIG. 12 can be configured to receive configuration information for paging through one or more transceivers (106) and perform monitoring for at least one paging opportunity within a paging frame based on the configuration information.

[0319] Furthermore, one or more memories (104) of the first device (100) may store instructions for performing the method described in the example of FIG. 10 or the examples described above when executed by one or more processors (102).

[0320] FIG. 11 is a diagram for explaining the operation of a base station in a wireless communication system according to an embodiment of the present disclosure.

[0321] Referring to FIG. 11, the base station can receive capability information related to network energy saving from the terminal (S1110).

[0322] For example, a terminal may report to a base station as terminal capability information whether it supports features related to network energy saving.

[0323] Based on the capability information, the base station can transmit setting information for paging to the terminal (S1120).

[0324] For example, if the base station determines that the terminal supports network energy saving, it may (additionally) transmit to the terminal paging configuration information related to network energy saving.

[0325] In this regard, the configuration information in step S1120 may include a parameter (e.g., nAndPagingFrameOffset in PCCH-Config) for deriving the number of paging frames within a cycle related to paging (e.g., a DRX cycle or a paging cycle). At this time, the parameter may be defined to enable setting a single paging frame during the cycle related to paging. That is, the parameter may be set to a value for setting only one paging frame within the cycle related to paging.

[0326] Specific features of parameters defined to enable setting a single paging frame during the aforementioned cycle, other parameters for the number of paging opportunities within a paging frame, setting information, information for the interval between paging frames, and multiple setting information for paging, etc., are the same as those described with reference to FIG. 10, and therefore, redundant descriptions are omitted.

[0327] The method described in the example of FIG. 11 can be performed by the second device (200) of FIG. 12. That is, the base station of FIG. 11 can be implemented by the second device (200). For example, one or more processors (202) of the second device (200) of FIG. 12 can be configured to receive capability information related to network energy saving through one or more transceivers (206) and transmit setting information for paging based on the capability information.

[0328] Furthermore, one or more memories (204) of the second device (200) may store instructions for performing the method described in the example of FIG. 11 or the examples described above when executed by one or more processors (202).

[0329] The proposed methods based on the NES terminal, NES RO, and / or NES cell described in the present disclosure can be extended and applied to systems that support other technologies for similar methods (e.g., coverage enhancement, WUS (wake-up-signal), ambient IoT, duplex enhancement, etc.) in addition to wireless communication systems that support NES.

[0330] Information regarding the applicability of the proposed methods of the present disclosure (or information regarding the rule(s) of the proposed methods) may be defined so that the base station notifies the terminal via a predefined signal (e.g., a physical layer signal or a higher layer signal). For example, the higher layer may include one or more of the functional layers, such as MAC, RLC, PDCP, RRC, and SDAP.

[0331] General devices to which the present disclosure may be applied

[0332] FIG. 12 illustrates a block diagram of a wireless communication device according to one embodiment of the present disclosure.

[0333] Referring to FIG. 12, the first device (100) and the second device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, LTE-A, LTE-A pro, NR, 5G, 5G-A, 6G).

[0334] A first device (100) includes one or more processors (102) and one or more memories (104), and may additionally include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memories (104) and / or the transceivers (106), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present disclosure.

[0335] For example, the processor (102) may process information in the memory (104) to generate first information / signal and then transmit a wireless signal including the first information / signal through the transceiver (106). In addition, the processor (102) may receive a wireless signal including second information / signal through the transceiver (106) and then store information obtained from signal processing of the second information / signal in the memory (104).

[0336] The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may perform some or all of the processes controlled by the processor (102), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in the present disclosure. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals via one or more antennas (108). The transceiver (106) may include a transmitter and / or a receiver. The transceiver (106) may be used interchangeably with an RF (Radio Frequency) unit. In the present disclosure, a device may also mean a communication modem / circuit / chip.

[0337] The second device (200) includes one or more processors (202), one or more memories (204), and may further include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memories (204) and / or the transceivers (206), and may be configured to implement the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present disclosure. For example, the processor (202) may process information in the memory (204) to generate third information / signals, and then transmit a wireless signal including the third information / signals via the transceivers (206). In addition, the processor (202) may receive a wireless signal including fourth information / signals via the transceivers (206), and then store information obtained from signal processing of the fourth information / signals in the memory (204). The memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, the memory (204) may perform some or all of the processes controlled by the processor (202), or may store software code including commands for performing the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present disclosure. Here, the processor (202) and the memory (204) may be part of a communication modem / circuit / chip designed to implement a wireless communication technology (e.g., LTE, NR). The transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals via one or more antennas (208). The transceiver (206) may include a transmitter and / or a receiver. The transceiver (206) may be used interchangeably with an RF unit. In the present disclosure, a device may also mean a communication modem / circuit / chip.

[0338] Hereinafter, the hardware elements of the device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or one or more Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in the present disclosure. One or more processors (102, 202) may generate messages, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or operation flowcharts disclosed in the present disclosure. One or more processors (102, 202) can generate signals (e.g., baseband signals) including PDUs, SDUs, messages, control information, data or information according to the functions, procedures, proposals and / or methods disclosed in the present disclosure, and provide the signals to one or more transceivers (106, 206). One or more processors (102, 202) can receive signals (e.g., baseband signals) from one or more transceivers (106, 206) and obtain PDUs, SDUs, messages, control information, data or information according to the descriptions, functions, procedures, proposals, methods and / or operational flowcharts disclosed in the present disclosure.

[0339] One or more processors (102, 202) may be referred to as a controller, a microcontroller, a microprocessor, or a microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in this disclosure may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. The descriptions, functions, procedures, proposals, methods and / or operation flowcharts disclosed in this disclosure may be implemented using firmware or software configured to perform one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods and / or operation flowcharts disclosed in this disclosure may be implemented using firmware or software in the form of codes, instructions and / or sets of instructions.

[0340] One or more memories (104, 204) may be coupled to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, codes, instructions, and / or commands. The one or more memories (104, 204) may be configured as ROM, RAM, EPROM, flash memory, hard drives, registers, cache memory, computer-readable storage media, and / or combinations thereof. The one or more memories (104, 204) may be located internally and / or externally to the one or more processors (102, 202). Additionally, the one or more memories (104, 204) may be coupled to the one or more processors (102, 202) via various technologies, such as wired or wireless connections.

[0341] One or more transceivers (106, 206) can transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or flowcharts of the present disclosure, to one or more other devices. One or more transceivers (106, 206) can receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or flowcharts of the present disclosure, from one or more other devices. For example, one or more transceivers (106, 206) can be connected to one or more processors (102, 202) and can transmit and receive wireless signals. For example, one or more processors (102, 202) can control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be coupled to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, or the like, as referred to in the descriptions, functions, procedures, proposals, methods, and / or operational flowcharts disclosed in the present disclosure, via one or more antennas (108, 208). In the present disclosure, one or more antennas may be multiple physical antennas or multiple logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert received user data, control information, wireless signals / channels, etc. from RF band signals to baseband signals in order to process the received user data, control information, wireless signals / channels, etc. using one or more processors (102, 202).One or more transceivers (106, 206) may convert user data, control information, wireless signals / channels, etc. processed by one or more processors (102, 202) from baseband signals to RF band signals. For this purpose, one or more transceivers (106, 206) may include an (analog) oscillator and / or filter.

[0342] The embodiments described above are combinations of components and features of the present disclosure in a predetermined form. Each component or feature should be considered optional unless explicitly stated otherwise. Each component or feature may be implemented without being combined with other components or features. Furthermore, it is also possible to form embodiments of the present disclosure by combining some components and / or features. The order of operations described in the embodiments of the present disclosure may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is self-evident that claims that do not have an explicit citation relationship in the patent claims may be combined to form embodiments or incorporated as new claims through post-application amendments.

[0343] It will be apparent to those skilled in the art that the present disclosure may be embodied in other specific forms without departing from the essential characteristics thereof. Therefore, the above detailed description should not be construed as limiting in any respect, but rather as illustrative. The scope of the present disclosure should be determined by a reasonable interpretation of the appended claims, and all modifications within the scope of equivalents of the present disclosure are intended to be included within the scope of the present disclosure.

[0344] The scope of the present disclosure includes software or machine-executable instructions (e.g., an operating system, an application, firmware, a program, etc.) that cause operations according to the methods of various embodiments to be executed on a device or a computer, and a non-transitory computer-readable medium having such software or instructions stored thereon and executable on the device or computer. Instructions that can be used to program a processing system to perform the features described in the present disclosure can be stored on / in a storage medium or a computer-readable storage medium, and a computer program product including such a storage medium can be used to implement the features described in the present disclosure. The storage medium can include, but is not limited to, high-speed random access memory, such as DRAM, SRAM, DDR RAM, or other random access solid state memory devices, and can include non-volatile memory, such as one or more magnetic disk storage devices, optical disk storage devices, flash memory devices, or other non-volatile solid state storage devices. The memory optionally includes one or more storage devices remotely located from the processor(s). The memory or, alternatively, the non-volatile memory device(s) within the memory comprise a non-transitory computer-readable storage medium. The features described in this disclosure may be incorporated into software and / or firmware stored on any of the machine-readable media, which may control the hardware of the processing system and allow the processing system to interact with other mechanisms that utilize results according to embodiments of the present disclosure. Such software or firmware may include, but is not limited to, application code, device drivers, operating systems, and execution environments / containers.

[0345] Here, the wireless communication technology implemented in the device (100, 200) of the present disclosure may include not only LTE, NR, and 6G, but also Narrowband Internet of Things for low-power communication. At this time, for example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology, and may be implemented with standards such as LTE Cat NB1 and / or LTE Cat NB2, and is not limited to the above-described names. Additionally or alternatively, the wireless communication technology implemented in the device (100, 200) of the present disclosure may perform communication based on LTE-M technology. At this time, for example, LTE-M technology may be an example of LPWAN technology, and may be called by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology can be implemented by at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the above-described names. Additionally or alternatively, the wireless communication technology implemented in the device (100, 200) of the present disclosure can include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) considering low-power communication, and is not limited to the above-described names. For example, ZigBee technology can create personal area networks (PAN) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and can be called by various names.

[0346] The method proposed in this disclosure is explained with a focus on examples applied to 3GPP LTE / LTE-A, 5G, and 6G systems, but can be applied to various wireless communication systems in addition to 3GPP LTE / LTE-A, 5G, and 6G systems.

Claims

1. A step of receiving setting information for paging from a base station by a terminal; and A step of performing monitoring for at least one paging opportunity within a paging frame based on the setting information by the terminal, The above setting information includes parameters for deriving the number of paging frames within a cycle related to the paging, A method wherein the above parameters are defined to enable setting a single paging frame during the above cycle.

2. In paragraph 1, The predefined candidate values of the above parameters are defined as values obtained by dividing the cycle by 2^n, where n is a positive integer including 0.

3. In paragraph 2, A method wherein the predefined candidate values of the parameter include at least one value indicating that one paging frame is set per unit exceeding 32 frames, based on the fact that the cycle can be set to a length greater than or equal to 32 frames.

4. In paragraph 1, The above configuration information further includes other parameters regarding the number of paging opportunities within a paging frame, A method wherein the other parameter is set to a value greater than or equal to a specific value, based on the above parameter being set to a value that sets a single paging frame during the cycle.

5. In paragraph 4, The above specific value is 2, how.

6. In paragraph 4, A method wherein the predefined candidate values of the other parameters include {1, 2, 4} and further include at least one of {8, 16, 32}.

7. In paragraph 1, The above terminal corresponds to a terminal that supports capability information related to network energy saving.

8. In paragraph 7, A method in which the above setting information is set independently from the setting information for paging of a terminal that does not support capability information related to the above network energy saving.

9. In paragraph 1, Further comprising the step of receiving information about the interval between paging frames from the base station, A method in which the index of a paging frame is indexed based on the above information.

10. In paragraph 1, A method further comprising a step of receiving information on setting information to be used at a specific point in time from the plurality of setting information pieces provided by the base station to the terminal.

11. In paragraph 10, The above information corresponds to bitmap information for the pattern of the time interval to which each setting information is applied.

12. One or more transceivers; and comprising one or more processors connected to said one or more transceivers, One or more of the above processors: Receive setup information for paging; Based on the above configuration information, monitoring is set to be performed for at least one paging opportunity within the paging frame, The above setting information includes parameters for deriving the number of paging frames within a cycle related to the paging, The above parameters are defined to enable a single paging frame to be set during the above cycle, the device.

13. A step of receiving capability information related to network energy saving from a terminal by a base station; and A step of transmitting, by the base station, setting information for paging to the terminal based on the above capability information, The above setting information includes parameters for deriving the number of paging frames within a cycle related to the paging, A method wherein the above parameters are defined to enable setting a single paging frame during the above cycle.

14. One or more transceivers; and comprising one or more processors connected to said one or more transceivers, One or more of the above processors: Receive capability information related to network energy saving; Based on the above capability information, set the setting information for paging to be transmitted; The above setting information includes parameters for deriving the number of paging frames within a cycle related to the paging, The above parameters are defined to enable a single paging frame to be set during the above cycle, the device.

15. One or more processors; and A processing device comprising one or more computer memories operatively connected to said one or more processors and storing instructions for performing a method according to any one of claims 1 to 11 based on execution by said one or more processors.

16. One or more non-transitory computer-readable media storing one or more instructions that are executed by one or more processors to control the performance of a method according to any one of claims 1 to 11.

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