Method and device for performing paging in wireless communication system

Abstract

A method and a device for performing paging in a wireless communication system are disclosed. A method according to one embodiment of the present disclosure may comprise the steps of: receiving, by a terminal, first paging configuration information for a first terminal type and second paging configuration information for a second terminal type; and monitoring, by the terminal, a paging occasion corresponding to a terminal identifier (ID) of the terminal on the basis of at least one of the first paging configuration information or the second paging configuration information. Here, the second terminal type may correspond to a terminal type supporting capability for network energy saving.

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 a paging opportunity based on frequency division multiplex (FDM) for paging that takes network energy saving (NES) into account.

[0006] The technical problem of the present disclosure is to provide a method and device for setting / defining UE_ID grouping / mapping for an NES terminal, for paging considering NES.

[0007] 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 will be clearly understood by a person having ordinary skill in the technical field to which the present disclosure belongs from the description below.

[0008] A method according to one aspect of the present disclosure may include: receiving, by a terminal, first paging configuration information for a first terminal type and second paging configuration information for a second terminal type; and monitoring, by the terminal, a paging opportunity corresponding to a terminal identifier (ID) of the terminal based on at least one of the first paging configuration information or the second paging configuration information. Here, the second terminal type corresponds to a terminal type that supports a network energy saving capability, and based on a partial overlap between first paging opportunities based on the first paging configuration information and second paging opportunities based on the second paging configuration information, terminal ID assignment for the second paging opportunity overlapping with the first paging opportunity may be based on the terminal ID assignment for the first paging opportunity.

[0009] A method according to an additional aspect of the present disclosure may include: transmitting, by a base station, first paging configuration information for a first terminal type and second paging configuration information for a second terminal type; and transmitting, by the base station, a paging signal in at least one paging opportunity based on at least one of the first paging configuration information or the second paging configuration information. Here, the second terminal type corresponds to a terminal type that supports a capability for network energy saving, and based on a partial overlap between first paging opportunities based on the first paging configuration information and second paging opportunities based on the second paging configuration information, assignment of a terminal ID (identifier) ​​for the second paging opportunity overlapping with the first paging opportunity may be based on assignment of the terminal ID for the first paging opportunity.

[0010] According to various embodiments of the present disclosure, a method and apparatus for performing paging in a wireless communication system can be provided.

[0011] According to various embodiments of the present disclosure, a method and device for setting a paging opportunity based on frequency division multiplex (FDM) for paging that takes network energy saving (NES) into account can be provided.

[0012] According to various embodiments of the present disclosure, a method and device for setting / defining UE_ID grouping / mapping for NES terminals for paging considering NES can be provided.

[0013] By various embodiments of the present disclosure, there is a technical effect of preventing an unnecessary wake-up operation of a NES terminal due to a legacy terminal even when an NES paging opportunity and a legacy paging opportunity overlap by setting / defining an efficient UE_ID grouping / mapping.

[0014] 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.

[0015] 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.

[0016] Figure 1 illustrates the structure of a wireless communication system to which the present disclosure can be applied.

[0017] FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.

[0018] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure can be applied.

[0019] FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure can be applied.

[0020] FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure can be applied.

[0021] 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.

[0022] FIG. 7 illustrates a flexible network topology to which some examples of the present disclosure may be applied.

[0023] FIG. 8 illustrates an example of an operation procedure of a base station supporting NES technology applicable to the present disclosure.

[0024] Figure 9 is an example diagram showing a paging procedure.

[0025] FIG. 10 illustrates an example of PO(s) monitored by an NES terminal according to an embodiment of the present disclosure.

[0026] FIG. 11 illustrates another example of PO(s) monitored by an NES terminal according to an embodiment of the present disclosure.

[0027] FIG. 12 illustrates another example of PO(s) monitored by an NES terminal according to an embodiment of the present disclosure.

[0028] FIG. 13 illustrates another example of PO(s) monitored by an NES terminal according to an embodiment of the present disclosure.

[0029] FIG. 14 illustrates NES paging opportunity (PO) allocation according to an embodiment of the present disclosure.

[0030] FIG. 15 is a diagram for explaining the operation of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0031] FIG. 16 is a diagram for explaining the operation of a base station in a wireless communication system according to an embodiment of the present disclosure.

[0032] FIG. 17 illustrates a block diagram of a wireless communication device according to one embodiment of the present disclosure.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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).

[0045] 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).

[0046] Abbreviations for terms that may be used in this disclosure are defined as follows.

[0047] - BM: beam management

[0048] - CQI: Channel Quality Indicator

[0049] - CRI: Channel state information - reference signal resource indicator

[0050] - CSI: Channel State Information

[0051] - CSI-IM: Channel State Information - Interference Measurement

[0052] - CSI-RS: Channel state information - reference signal

[0053] - DMRS: Demodulation Reference Signal

[0054] - FDM: frequency division multiplexing

[0055] - FFT: fast Fourier transform

[0056] - IFDMA: interleaved frequency division multiple access

[0057] - IFFT: inverse fast Fourier transform

[0058] - L1-RSRP: Layer 1 reference signal received power

[0059] - L1-RSRQ: Layer 1 reference signal received quality

[0060] - MAC: Medium Access Control

[0061] - NZP: non-zero power

[0062] - OFDM: orthogonal frequency division multiplexing

[0063] - PDCCH: Physical downlink control channel

[0064] - PDSCH: Physical downlink shared channel

[0065] - PMI: precoding matrix indicator

[0066] - RE: resource element

[0067] - RI: Rank indicator

[0068] - RRC: Radio Resource Control

[0069] - RSSI: Received signal strength indicator

[0070] - Rx: Reception

[0071] - QCL: quasi co-location

[0072] - SINR: signal to interference and noise ratio

[0073] - SSB (or SS / PBCH block): Synchronization signal block (including primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH))

[0074] - TDM: Time Division Multiplexing

[0075] - TRP: transmission and reception point

[0076] - TRS: Tracking Reference Signal

[0077] - Tx: transmission

[0078] - UE: user equipment

[0079] - ZP: Zero Power

[0080] System General

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] Figure 1 illustrates the structure of a wireless communication system to which the present disclosure can be applied.

[0087] 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.

[0088] FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure can be applied.

[0089] 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.

[0090] 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.

[0091] μΔf=2 μ ·15 [kHz]CP015 Normal 130 Normal 260 Normal, Extended 3120 Normal 4240 Normal

[0092] 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.

[0093] 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).

[0094] Frequency Range Designation Corresponding Frequency Range Subcarrier Spacing FR1410MHz - 7125MHz 15, 30, 60kHz FR224250MHz - 52600MHz 60, 120, 240kHz

[0095] 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.

[0096] 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.

[0097] 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.

[0098] μN symb slot N slot frame,μ N slot subframe,μ01410111420221440431480841416016

[0099] μN symb slot N slot frame,μ N slot subframe,μ212404

[0100] 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.

[0101] 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.

[0102] 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.

[0103] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure can be applied.

[0104] 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.

[0105] Point A serves as a common reference point of the resource block grid and is obtained as follows.

[0106] - 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.

[0107] - absoluteFrequencyPointA represents the frequency-position of point A expressed as ARFCN (absolute radio-frequency channel number).

[0108] 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.

[0109]

[0110] 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, where i is the number of 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.

[0111]

[0112] N BWP,i start,μ is a common resource block where BWP starts relative to common resource block 0.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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).

[0117] Meanwhile, a base station can configure multiple BWPs 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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).

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] Table 5 shows an example of DCI format in the next-generation RAT system.

[0130] 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

[0131] 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.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] FIG. 7 illustrates a flexible network topology to which some examples of the present disclosure may be applied.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] Network Energy Saving (NES)

[0144] 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.

[0145] 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.

[0146] FIG. 8 illustrates an example of an operation procedure of a base station supporting NES technology applicable to the present disclosure.

[0147] 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.).

[0148] 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.

[0149] 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.

[0150] 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.

[0151] - 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).

[0152] - Inter-system energy saving solution: NG-RAN nodes that own capacity booster cells can autonomously transition those cells to an inactive state.

[0153] - 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.

[0154] - 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.

[0155] 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.

[0156] - 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.

[0157] - 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.

[0158] 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.

[0159] Paging

[0160] 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.

[0161] Figure 9 is an example diagram showing a paging procedure.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] 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:

[0168] The SFN for PF is determined by the following mathematical expression 3.

[0169]

[0170] 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.

[0171]

[0172] 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.

[0173] 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.

[0174] 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.

[0175] 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.

[0176] The parameters used in the calculation of the above PF and i_s are as follows.

[0177] 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.

[0178] N: Total number of paging frames in T

[0179] Ns: Number of paging opportunities for one PF

[0180] PF_offset: Offset used to determine PF

[0181] UE_ID: 5G-S-TMSI mod 1024

[0182] Parameters N, Ns, first-PDCCH-MonitoringOccashionOfPO, PF_offset and length of default DRX cycle can be signaled in SIB1.

[0183] If the terminal does not have 5G-S-TMSI (e.g., 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.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] 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.

[0189] 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.

[0190] 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.

[0191] 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.

[0192] 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.

[0193] 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.

[0194] In this regard, matters concerning subgroups can be defined as follows:

[0195] 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.

[0196] The parameters used to determine the subgroup ID may be:

[0197] - subgroupsNumPerPO: Total number of subgroups for CN-assigned subgrouping (if any) and UE_ID-based subgrouping (if any) in PO, broadcast in system information.

[0198] - subgroupsNumForUEID: Number of subgroups for UE_ID based subgrouping in PO, broadcast in system information.

[0199] Subgroups of terminals can be assigned by CN or formed based on UE_ID.

[0200] - If subgroupsNumForUEID is not present in subgroupConfig, the cell uses the subgroup ID based on the CN-assigned subgrouping if available to the terminal.

[0201] - 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.

[0202] - If both subgroupsNumPerPO and subgroupsNumForUEID are set and subgroupsNumForUEID < subgroupsNumPerPO:

[0203] -- If available to the terminal, a subgroup ID based on CN assignment subgrouping is used in the cell.

[0204] -- Otherwise, a subgroup ID based on UE_ID-based subgrouping is used in the cell.

[0205] 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.

[0206] Additionally, paging in extended DRX may also be considered.

[0207] 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.

[0208] 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.

[0209] Setting up paging opportunities and UE_ID grouping / mapping for NES

[0210] In the present disclosure, a method for setting a paging occasion (PO) based on frequency division multiplexing (FDM) considering the aforementioned NES and a UE_ID grouping / mapping method for a terminal supporting NES are proposed.

[0211] For clarity of explanation, in the present disclosure, a terminal that supports NES (e.g., a terminal with 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. In addition, a PF / PO configured for an NES terminal is referred to as an NES PF / PO, and a PF / PO configured for a legacy terminal is referred to as a legacy PF / PO.

[0212] Example 1

[0213] This embodiment relates to a method for setting up an FDM-based PO (e.g., a frequency division multiplexed (FDMed) PO) for an NES terminal.

[0214] Hereinafter, a method for setting up an FDM-based PO based on one or more bandwidth parts (BWPs) is described through specific embodiments. In the embodiments, PF may refer to a PF for an NES terminal, and PO may refer to a PO for an NES terminal.

[0215] In the conventional method, POs are configured to be spread out (e.g., distributed) along the time axis. For example, there are N PFs within a specific DRX cycle (e.g., T frame), and N PFs within a specific PF. s When N POs are allocated, a total of N PFs are evenly distributed at the frame level within a specific DRX cycle (e.g., T frame), and N s A PO of N can be allocated within the frame of each PF. s When a PO is allocated, the offset assigned to each PO can be applied.

[0216] However, from an NES perspective, it may be more desirable / efficient to configure multiple POs via FDM at a specific point in time, rather than having POs spread out (e.g., distributed) along the time axis. In this regard, FDM-based POs may be configured / configured based on one or more of the methods described below.

[0217] (Example 1-1)

[0218] In the conventional method, the base station can provide search space settings for paging (e.g., settings for PF and / or PO) in a specific DL BWP (e.g., initial DL BWP). In this case, the base station can additionally provide a frequency offset to the settings, defining that an additional PO (e.g., NES PO) that is FMD with the legacy PO of the PF is allocated. In this case, the value of the frequency offset can be set / indicated at the PRB (or subcarrier) level.

[0219] Additionally, based on the value provided by the base station, the terminal can apply a frequency offset based on the lowest / highest frequency PRB (or lowest / highest frequency subcarrier) occupied by the existing paging search space. Based on this, the terminal can specify the location of the paging search space occupied by an additional PO (e.g., an FDM-based PO). For example, the location may be the location of the lowest frequency subcarrier or PRB occupied by the additional PO.

[0220] For example, if the base station provides / sets one frequency offset value, it can be defined / set that one additional PO is allocated at the same starting OFDM symbol position as a legacy PO located in a specific PF, and is separated by the same frequency offset. As another example, if the base station provides / sets multiple (e.g., M, where M>1) frequency offset values, it can be defined / set that multiple additional POs with different frequency offsets are allocated at the same starting OFDM symbol position as a legacy PO located in a specific PF.

[0221] At this time, each of the plurality of frequency offsets may be set to be applied as a frequency offset based on the lowest / highest frequency PRB (or frequency subcarrier) of the legacy PO. Alternatively, for the plurality of frequency offsets, the first additional PO (e.g., additional PO #1) may be defined to apply the first frequency offset value based on the lowest / highest frequency PRB (or frequency subcarrier) of the legacy PO. At this time, starting from the second additional PO (e.g., additional PO #2), the frequency offset value set for each FDM-based PO may be defined to be applied based on the lowest / highest frequency PRB (or frequency subcarrier) of the newly allocated FDM-based PO immediately before (e.g., additional PO #1).

[0222] In this regard, based on the value provided by the base station, the terminal can apply a frequency offset based on the lowest / highest frequency PRB (or frequency subcarrier) occupied by a specific paging search space. Based on this, the terminal can specify the location of the paging search space occupied by an additional PO (e.g., an FDM-based PO). For example, the location may be the location of the lowest frequency subcarrier or PRB occupied by the additional PO. In this case, if the base station does not provide / configure the frequency offset, the terminal can be configured / defined to use a legacy PO.

[0223] Additionally, a method may be considered in which the base station provides / sets the frequency offset value as a common value, while additionally setting / indicating information on the number of additional POs to be allocated (e.g., FDM-based POs). In this case, the number of additional POs may be set / indicated as a positive integer. Even in this case, it may be defined that additional POs are allocated at the same starting OFDM symbol position as the legacy PO located in a specific PF, and are separated by the corresponding frequency offset.

[0224] For example, in the case described above, since the frequency offset value is fixed to one, the first additional PO (e.g., additional PO #1) can be defined to apply a frequency offset based on the lowest / highest frequency PRB (or frequency subcarrier) of the legacy PO. At this time, from the second additional PO (e.g., additional PO #2), the frequency offset value can be defined to apply a frequency offset value based on the lowest / highest frequency PRB (or frequency subcarrier) of the newly allocated PO (e.g., additional PO #1) immediately before.

[0225] In this regard, based on the value provided by the base station, the terminal can apply a frequency offset based on the lowest / highest frequency PRB (or frequency subcarrier) occupied by a specific paging search space. Based on this, the terminal can specify the location of the paging search space occupied by an additional PO (e.g., an FDM-based PO). For example, the location may be the location of the lowest frequency subcarrier or PRB occupied by the additional PO.

[0226] At this time, if the base station does not provide / configure the frequency offset, the terminal can expect that the number of additional POs (e.g., the number of FDM-based POs) will not be indicated, and can be configured / defined to use legacy POs. Alternatively, if the base station only indicates the frequency offset value and does not indicate the value for the additional PO (e.g., the FDM-based PO), the terminal can interpret it as adding one additional PO and operate. Alternatively, if the base station provides / configures the frequency offset value, the terminal can expect that the number of additional POs (e.g., the number of FDM-based POs) will always be indicated.

[0227] Additionally or alternatively, a method may be considered in which FDM-based POs are allocated to all POs within a specific DRX cycle (e.g., T frame) without a separate instruction by the base station. However, if FDM-based POs for all POs within a DRX cycle (e.g., T frame) are unnecessary (based on the base station's judgment), the base station may instruct a specific PF and / or a specific PO to be allocated an FDM-based PO. To this end, the base station may configure / instruct a PF index and / or a PO index to which an FDM-based PO is to be allocated to the NES terminal through upper layer signaling.

[0228] For example, the base station may provide only a PF index, and based on this, instruct to allocate FDM-based POs at all PO index points within the indicated PF index within a DRX cycle (e.g., T frame). As another example, the base station may provide only a PO index, and based on this, instruct to allocate FDM-based POs at the indicated PO index points existing in each PF within a DRX cycle (e.g., T frame). As yet another example, the base station may provide both a PF index and a PO index, and based on this, instruct to allocate FDM-based POs at the indicated PO index points within the indicated PF index within a DRX cycle (e.g., T frame). The NES terminal may be configured to specify an allocation location of an FDM-based PO based on the PF index and / or PO index indicated by the base station, and to monitor the corresponding PO.

[0229] Additionally or alternatively, in another way, the number and locations of FDM-based POs may be predefined based on predefined rules, such as the number of PFs provided by the base station and the number of frequency offsets for FDM-based POs.

[0230] For example, in a situation where the number of PFs set by the base station is N, if (N-1) frequency offset values ​​for FDM-based POs are provided / set, (N-1) FDM-based POs can be set to be configured in a frame corresponding to a specific PF among the N PFs (and in a specific PO within the PF). Here, the frequency offset can be applied as in the proposed method(s) described above. At this time, the frame information corresponding to the specific PF can be pre-defined (e.g., the first PF or the last PF) or set / instructed by the base station, and a method of rotation per DRX cycle can be considered.

[0231] As another example, when the number of PFs set by the base station is N, and one frequency offset value for an FDM-based PO is provided / set, it can be set so that one FDM-based PO is configured in a frame corresponding to N / 2 PFs among the N PFs (and in a specific PO within the PFs). Here, the frequency offset can be applied as in the proposed method(s) described above. At this time, the frame information corresponding to the N / 2 PFs can be pre-defined (e.g., from the first PF to N / 2 or from the N / 2-th PF to the last PF), or can be set / instructed by the base station, and a method of rotation per DRX cycle can be considered.

[0232] (Example 1-2)

[0233] A method may be considered in which the base station additionally applies the search space configuration (e.g., configuration for PF and / or PO) for paging in a specific DL BWP (e.g., initial DL BWP) to other DL BWPs. For example, the base station may additionally allocate an additional DL BWP for NES terminals to the terminals in addition to the initial DL BWP, and the search space configuration for paging may be defined to use / apply the information of the initial DL BWP in the same manner. Based on this, legacy PF / PO may be configured in the initial DL BWP, and NES PF / PO may be additionally configured in the additional DL BWP.

[0234] Additionally or alternatively, the NES terminal may be defined to monitor multiple POs assigned to different DL BWPs. For example, if a legacy PO is assigned to the initial DL BWP, as in the example described above, and an NES PO is assigned to an additional DL BWP, the NES terminal may be configured / defined to monitor both the legacy PO and the NES PO together.

[0235] Additionally or alternatively, a method of indicating the same ID of a search space for monitoring POs to multiple DL BWPs may also be considered. For example, if a search space for monitoring POs is indicated with a search space ID X in a specific DL BWP (e.g., an initial DL BWP), and a search space ID X is indicated in another DL BWP, a method may be applied in which the base station transmits a PO using a paging configuration defined for the specific DL BWP in the corresponding search space.

[0236] When there are legacy POs and FDM-based PO(s) allocated through the proposed method described above, and a UE_ID for an NES terminal exists in both POs, a method may be considered in which the base station dynamically sets / instructs the NES terminal as to which PO to monitor among the legacy PO and / or the NES PO. In other words, a method may be applied in which the base station sets / instructs the NES terminal as to whether the newly allocated FDM-based PO is actually used. For example, when the base station instructs the NES terminal to monitor the legacy PO, the base station does not need to transmit the NES PO, and the NES terminal may be defined to monitor only the legacy PO. Furthermore, when the base station instructs the terminal to monitor the NES PO, the NES terminal may be defined to monitor the legacy PO and / or the NES PO.

[0237] Example 2

[0238] This embodiment is about a method for UE_ID grouping / mapping of NES terminals.

[0239] Below, a method for grouping / mapping UE_IDs of NES terminals in a case where legacy POs and NES POs are allocated to the same cell / carrier (based on FDM or TDM) is described through specific embodiments.

[0240] (Example 2-1)

[0241] We propose a method for grouping / mapping the UE_IDs of NES terminals by considering only NES POs.

[0242] If the base station provides / configures NES POs, it can be configured / defined to distribute UE_ID using only NES POs.

[0243] An NES terminal may be configured / defined to monitor only the NES PO associated with its UE_ID, or may be configured / defined to monitor both the legacy PO and the NES PO associated with its UE_ID. In this case, if the legacy PO and the NES PO associated with its UE_ID are FDM'd at the same time, the NES terminal may be configured / defined to monitor only one of the two (e.g., the NES PO or the legacy PO).

[0244] Alternatively, if the base station does not provide / configure NES PO, NES terminals (as well as legacy terminals) can be configured / defined to monitor legacy PO based on UE_ID.

[0245] (Example 2-2)

[0246] We propose a method for grouping / mapping UE_IDs of NES terminals by considering both legacy PO and NES PO, but in which NES terminal(s) also follow the UE_ID value assigned to the legacy PO.

[0247] UE_ID grouping / mapping for NES terminals may be performed by considering both legacy POs and NES POs allocated within a specific DRX cycle (e.g., T frame). In this regard, the NES terminal may be defined to use a UE_ID group corresponding to a legacy PO at a different time from the FDM-enabled legacy PO in the NES PO allocated by FDM with the legacy PO. In this case, UE_ID distribution for the NES terminal may be defined to be performed using the FDM-enabled legacy PO and the NES PO.

[0248] FIG. 10 illustrates an example of PO(s) monitored by an NES terminal according to an embodiment of the present disclosure.

[0249] Referring to FIG. 10, there are four legacy POs (e.g., legacy POs #0, #1, #2, #3) within a specific DRX cycle (e.g., T frame), and two specific ones of the four legacy POs (e.g., legacy POs #0, #1) and two NES POs (e.g., NES POs #0, #1) can be additionally defined based on FDM.

[0250] In this case, the UE_ID grouping for NES terminal(s) can be defined as follows.

[0251] - The NES terminal corresponding to the UE_ID assigned to legacy PO #0 monitors legacy PO #0.

[0252] - The NES terminal corresponding to the UE_ID assigned to Legacy PO #1 monitors Legacy PO #1.

[0253] - NES terminals corresponding to the UE_ID assigned to legacy PO #2 monitor NES PO #0 (or NES PO #1).

[0254] - NES terminals corresponding to the UE_ID assigned to legacy PO #3 monitor NES PO #1 (or NES PO #0).

[0255] At this time, when the base station sets the NES PO for the NES terminal(s), the base station can be defined to set the NES PO including the location where the legacy PO is set. For example, in the example of FIG. 10, if the base station sets four NES POs, the base station can additionally set NES PO #0 at the location of legacy PO #0 and additionally set NES PO #1 at the location of legacy PO #1. In addition, the base station can additionally set two FDM-based POs (e.g., NES PO #0, NES PO #1 of FIG. 10), and the two FDM-based POs can be referred to as NES PO #2 and NES PO #3. Based on this, the NES terminals can be set / defined to group UE_IDs using NES POs #1, #2, #3, and #4.

[0256] Additionally or alternatively, the NES terminal may be defined to use the UE_ID group of the legacy PO that is FDMed at the same time in the NES PO that is allocated through FDM with the legacy PO. In this case, the UE_ID distribution for the NES terminal may be defined to be performed using the FDMed NES PO and the non-FDMed legacy PO. In other words, the NES terminal may be defined to distribute and set the UE_ID targeting the union of the remaining legacy POs and the NES PO, excluding the NES PO and the FDMed legacy PO.

[0257] FIG. 11 illustrates another example of PO(s) monitored by an NES terminal according to an embodiment of the present disclosure.

[0258] Referring to FIG. 11, there are four legacy POs (e.g., legacy POs #0, #1, #2, #3) within a specific DRX cycle (e.g., T frame), and two specific ones of the four legacy POs (e.g., legacy POs #0, #1) and two NES POs (e.g., NES POs #0, #1) can be additionally defined based on FDM.

[0259] In this case, the UE_ID grouping for NES terminal(s) can be defined as follows.

[0260] - The NES terminal corresponding to the UE_ID assigned to legacy PO #0 monitors NES PO #0 (or NES PO #1).

[0261] - The NES terminal corresponding to the UE_ID assigned to legacy PO #1 monitors NES PO #1 (or NES PO #0).

[0262] - The NES terminal corresponding to the UE_ID assigned to Legacy PO #2 monitors Legacy PO #2.

[0263] - The NES terminal corresponding to the UE_ID assigned to Legacy PO #3 monitors Legacy PO #3.

[0264] Additionally or alternatively, POs to be FDMed can be set to be allocated at a specific PO point in time within a specific DRX cycle (e.g., T frame). In this case, the NES terminal has the advantage of monitoring one PO that matches / maps to the UE_ID among the FDM-based POs at a specific point in time and going to sleep. Using this method, the number of NES POs to be FDMed can be determined based on the total number of POs within a DRX cycle (e.g., T frame). For example, a total of N*N POs can be allocated within a DRX cycle (e.g., T frame). s If POs are allocated, the number of NES POs to be FDMed is N*N s-1 can be. That is, based on legacy PO and FDM at a certain point in time, total N*N s There may be multiple POs. Based on this, UE_ID distribution for NES terminals can be defined as being performed using FDM-enabled legacy POs and NES POs.

[0265] FIG. 12 illustrates another example of PO(s) monitored by an NES terminal according to an embodiment of the present disclosure.

[0266] Referring to FIG. 12, there are four legacy POs (e.g., legacy POs #0, #1, #2, #3) within a specific DRX cycle (e.g., T frame), and one of the four legacy POs (e.g., legacy PO #0) and three NES POs (e.g., NES POs #0, #1, #2) can be additionally defined based on FDM.

[0267] In this case, the UE_ID grouping for NES terminal(s) can be defined as follows.

[0268] - The NES terminal corresponding to the UE_ID assigned to legacy PO #0 monitors legacy PO #0.

[0269] - NES terminals corresponding to the UE_ID assigned to legacy PO #1 monitor NES PO #0.

[0270] - NES terminals corresponding to the UE_ID assigned to legacy PO #2 monitor NES PO #1.

[0271] - NES terminals corresponding to the UE_ID assigned to legacy PO #3 monitor NES PO #2.

[0272] At this time, when the base station sets the NES PO for the NES terminal(s), the base station can be defined to set the NES PO including the location where the legacy PO is set. For example, in the example of FIG. 12, if the base station sets four NES POs, the base station can additionally set NES PO #0 at the location of legacy PO #0. In addition, the base station additionally sets three FDM-based POs (e.g., NES PO #0, NES PO #1, NES PO #2 of FIG. 12), and the three FDM-based POs can be referred to as NES PO #1, NES PO #2, and NES PO #3. Based on this, the NES terminals can be set / defined to group UE_IDs using NES POs #1, #2, #3, and #4.

[0273] In relation to the above-described method, the base station may provide / configure a PF index and a PO index within a DRX cycle (e.g., a T frame) to define at what point in time an FDM-based PO will be configured. If the base station does not provide / configure this, it may be defined that an FDM-based PO is allocated to a specific PO (e.g., a first PO of a first PF) within a DRX cycle (e.g., a T frame). Alternatively, a method in which the point in time at which an FDM-based PO is allocated is cyclically shifted for each DRX cycle may also be considered.

[0274] FIG. 13 illustrates another example of PO(s) monitored by an NES terminal according to an embodiment of the present disclosure.

[0275] Referring to FIG. 13, for each DRX cycle, the point in time at which an FDM-based PO is allocated may be cyclically shifted based on a legacy PO index. In this case, the UE_ID group for NES terminals allocated to the FDM-based PO may also be defined to be cyclically shifted.

[0276] Additionally or alternatively, a method may be considered to consider both legacy POs and FDM'd NES POs for NES terminals, and to newly set up UE_ID groupings for NES terminals regardless of the legacy UE_IDs assigned to the legacy POs. However, in this case, since there is a possibility that the legacy UE may wake up unnecessarily, the UE_IDs assigned to each PO for NES terminals (e.g., legacy POs and NES POs) may be set / defined to be cyclically shifted. For example, assume that there is one legacy PO, three FDM'd NES POs at a certain point in time, and four UE_ID groups for NES terminals. In this case, if the UE_ID group of the NES terminals starting from the PO of the lowest / highest frequency (including the legacy PO and NES PO) in the first PF is {0, 1, 2, 3}, then the UE_ID group of the NES terminals starting from the PO of the lowest / highest frequency (including the legacy PO and NES PO) in the next PF can be defined to be {1, 2, 3, 0}. By applying this method, the legacy terminal(s) assigned to the legacy PO can be prevented from waking up repeatedly.

[0277] (Example 2-3)

[0278] We propose a method for performing UE_ID grouping when legacy POs and NES POs are allocated overlappingly.

[0279] When a base station configures a NES PO, a method of overlapping the NES PO with the legacy PO in terms of location and time domain may be more efficient from the base station's perspective when transmitting paging for a specific UE_ID. In other words, when a legacy PO and a NES PO are configured to overlap in time / frequency resources, the base station may consider a method of taking / setting the UE_ID(s) to be assigned to the NES PO to be the same as the UE_ID(s) assigned to the legacy PO to prevent unnecessary waking up of legacy terminals. Based on this, the base station has the technical effect of being able to simultaneously wake up the NES terminal and / or legacy terminal assigned to the overlapping PO through the PO.

[0280] PF / PO can be determined through PF / PO settings by legacy settings (e.g., legacy paging settings set via SIB1) and separate settings. Here, PF / PO through the separate settings (e.g., NES paging settings) can correspond to NES PF / PO. Mapping between PF / PO and UE_ID (e.g., UE_ID grouping) can be preferentially performed based on NES PO(s) within one paging cycle, and based on this, the corresponding UE_ID can be determined for each NES PO. For NES POs overlapping with legacy POs, the mapping (e.g., UE_ID grouping) is not applied as an exception, and mapping between PF / PO and UE_ID (e.g., UE_ID grouping) can be applied based on the legacy PO(s) set by the legacy settings.

[0281] Additionally or alternatively, in the method of determining the location of the NES PF based on the location of the legacy PF, a case in which the density of the NES PO is the same as the density of the legacy PO may be considered. Here, the density of the PO means the number of POs per DRX cycle (e.g., T frame).

[0282] For example, when there are N positions of legacy PFs within a specific DRX cycle (e.g., T frame), a situation of setting N NES PFs within the same DRX cycle can be considered. If N is 2 and the number of POs per PF (N s ) is 1, the legacy POs are each A frame and B frame (where A <B)에 할당되었음을 가정할 수 있으며, 이때, NES PO는 {A, A+K} 프레임에 할당되거나, {B-K, B} 프레임에 할당되도록 정의할 수 있다. 이와 관련하여, NES PO가 {A, A+K}인지, 또는 {B-K, B}인지에 대한 정보는 기지국이 상위 계층 시그널링(예를 들어, SIB 등)을 통해 단말에게 제공하도록 설정되거나, 사전에 정의되거나, 또는 DRX 사이클에 따라 로테이션하도록 설정될 수 있다. 일 예로, 첫번째 DRX 사이클에서 NES PO는 {A, A+K} 프레임에 할당되고, 다음 DRX 사이클에서 NES PO는 {B-K, B} 프레임에 할당될 수 있다. 또한, K 값은 사전에 정의되거나, 특정 규칙에 의해 결정되거나, 기지국에 의해 단말에게 설정 / 지시되도록 정의할 수 있다.

[0283] After the above-described setting, for NES POs that overlap with legacy POs in A frame or B frame, the UE_ID assigned to the legacy PO can be set / defined to be equally assigned to the NES PO. Afterwards, for non-overlapping NES POs, the UE_ID of each non-overlapping legacy PO can be set / defined to be equally assigned. In other words, when NES POs are assigned to {A, A+K} frames, the UE_ID of the NES PO assigned to the A frame can be set to be identical to the UE_ID of the legacy PO assigned to the A frame, and the UE_ID of the NES PO assigned to the A+K frame can be set to be identical to the UE_ID of the legacy PO assigned to the B frame. In addition, when the NES PO is assigned to the {BK, B} frame, the UE_ID of the NES PO assigned to the BK frame may be set to be the same as the UE_ID of the legacy PO assigned to the A frame, and the UE_ID of the NES PO assigned to the B frame may be set to be the same as the UE_ID of the legacy PO assigned to the B frame. In addition, N s A similar behavior to the above can also be applied in cases where the value is greater than 1 (e.g., there are multiple POs per PF).

[0284] For example, if a DRX cycle (e.g., T frame) is 32 frames and there is 1 PO per PF (e.g., N s =1), legacy PO can be assumed to be allocated to {0, 16} frames. At this time, if the base station allocates two NES POs within the corresponding DRX cycle (e.g., T frame) and the K value is 1, the NES PO can be defined to be allocated to {0, 1} frames or {15, 16} frames.

[0285] If the NES PO is assigned to frame {0, 1}, the UE_ID value of the NES PO assigned to frame 0 can be set equal to the UE_ID value of the legacy PO assigned to frame 0, and the UE_ID value of the NES PO assigned to frame 1 can be set equal to the UE_ID value of the legacy PO assigned to frame 16. Alternatively, if the NES PO is assigned to frame {15, 16}, the UE_ID value of the NES PO assigned to frame 15 can be set equal to the UE_ID value of the legacy PO assigned to frame 0, and the UE_ID value of the NES PO assigned to frame 16 can be set equal to the UE_ID value of the legacy PO assigned to frame 16.

[0286] For another example, if a DRX cycle (e.g., T frame) is 32 frames and there are 2 POs per PF (e.g., N s =2), legacy POs can be assumed to be allocated 2 each to {0, 16} frames. In other words, for legacy POs, 2 each to 0 frame, 2 each to 16 frame, a total of 4 POs can be allocated. At this time, if it is assumed that the base station allocates 2 NES POs within the corresponding DRX cycle (e.g., T frame), the number of POs per PF is 2, and the K value is 1, NES POs can be defined to be allocated 2 each to {0, 1} frames, a total of 4 POs, or 2 each to {15, 16} frames, a total of 4 POs.

[0287] When the NES PO is assigned to the {0, 1} frame, the UE_ID values ​​of the two NES POs assigned to the 0 frame may be set to be the same as the UE_ID values ​​of the two legacy POs assigned to the 0 frame, respectively, and the UE_ID values ​​of the two NES POs assigned to the 1 frame may be set to be the same as the UE_ID values ​​of the two legacy POs assigned to the 16 frame, respectively. Alternatively, when the NES PO is assigned to the {15, 16} frame, the UE_ID values ​​of the two NES POs assigned to the 15 frame may be set to be the same as the UE_ID values ​​of the two legacy POs assigned to the 0 frame, respectively, and the UE_ID values ​​of the two NES POs assigned to the 16 frame may be set to be the same as the UE_ID values ​​of the two legacy POs assigned to the 16 frame, respectively.

[0288] As another example, if a DRX cycle (e.g., T frame) is 32 frames and there are 2 POs per PF (e.g., N s=2), it can be assumed that two legacy POs are allocated to each of {0, 16} frames. In other words, for legacy POs, two can be allocated to frame 0, two to frame 16, and a total of four POs can be allocated. At this time, if the base station allocates one NES PF within the corresponding DRX cycle (e.g., T frame) and the number of POs per PF increases to four, the NES PF can be defined to be allocated four POs including the two legacy POs allocated to frame 0, or four POs including the two legacy POs allocated to frame 16. In order to ensure that the same UE_ID is mapped when legacy POs and NES POs overlap, it may be efficient to additionally allocate two NES POs after the two legacy POs when allocating NES PF to frame 0. Additionally, when allocating NES PF to 16 frames, it may be efficient to additionally allocate two NES POs to the two legacy PO predecessors.

[0289] Additionally or alternatively, in another way, a method of determining the location of the NES PF according to the location of the legacy PF may also be considered in which the density of the NES PO increases compared to the density of the legacy PO. For example, when the locations of N legacy PFs exist within a specific DRX cycle (e.g., a T frame), a case of setting 2N NES PFs within the same DRX cycle may be considered. If N=2 and the number of POs per PF (e.g., N s) is 1, the legacy POs are A frame and B frame (where A <B)에 할당된 것으로 가정할 수 있다. 이때, NES PO는 {A, A+K} 프레임 및 {B-K, B} 프레임에 할당되도록 정의할 수 있고, 또는 NES PO는 {A, A+K, A+2K, A+3K} 프레임에 할당되도록 정의할 수 있고, 또는 NES PO는 {B-3K, B-2K, B-K, B} 프레임에 할당되도록 정의할 수 있다(이 경우, 총 4개의 NES PO가 할당됨). 또한, 해당 K 값은 사전에 정의되거나, 특정 규칙에 의해 결정되거나, 기지국에 의해 단말에게 설정 / 지시될 수 있다.

[0290] After the above-mentioned setting, for NES POs overlapping with legacy POs in A frame or B frame, the UE_ID assigned to the legacy PO can be set / defined to be equally assigned to the NES PO. Afterwards, for non-overlapping NES POs (e.g., {A+K, BK} frame, or {A+K, A+2K, A+3K} frame, or {B-3K, B-2K, BK} frame, etc.), the UE-ID can be defined to be fairly grouped by considering the total number of POs within the corresponding DRX cycle (e.g., T frame). In addition, N s A similar behavior to the above can also be applied in cases where the value is greater than 1 (e.g., there are multiple POs per PF).

[0291] For example, if a DRX cycle (e.g., T frame) is 32 frames and there is 1 PO per PF (e.g., N s=1), legacy POs can be assumed to be allocated to {0, 16} frames. At this time, if the base station allocates 4 NES POs within the corresponding DRX cycle (e.g., T frame) and the K value is 1, the NES POs can be defined to be allocated to {0, 1, 15, 16} frames. The UE_ID value of the NES PO allocated to frame 0 can be set to be the same as the UE_ID value of the legacy PO allocated to frame 0, and the UE_ID value of the NES PO allocated to frame 1 can be set to be the same as the UE_ID value of the legacy PO allocated to frame 16.

[0292] For another example, if a DRX cycle (e.g., T frame) is 32 frames and there are 2 POs per PF (e.g., N s =2), legacy POs can be assumed to be allocated 2 each to {0, 16} frames. In other words, for legacy POs, 2 can be allocated to 0 frame, 2 can be allocated to 16 frame, and a total of 4 POs can be allocated. At this time, if it is assumed that the base station allocates 4 NES POs within the corresponding DRX cycle (e.g., T frame), the number of POs per PF is 2, and the K value is 1, NES POs can be defined to be allocated 2 each to {0, 1, 15, 16} frames. At this time, the UE_ID values ​​of the 2 NES POs allocated to the 0 frame can be set to be the same as the UE_ID values ​​of the 2 legacy POs allocated to the 0 frame, and the UE_ID values ​​of the 2 NES POs allocated to the 16 frame can be set to be the same as the UE_ID values ​​of the 2 legacy POs allocated to the 16 frame.

[0293] Additionally or alternatively, when a legacy PO and a NES PO partially overlap as described above, it may be defined that among the NES POs, the NES PO(s) that overlap with the legacy PO in terms of time / frequency resources follow the UE_ID allocation of the legacy PO, and the NES PO(s) that do not overlap with the legacy PO allocate UE_IDs using the non-overlapping NES PO(s). In this case, the UE_ID allocation for the NES PO(s) that do not overlap with the legacy PO may be based on Equation 5.

[0294]

[0295] In mathematical expression 5, N s represents the number of paging opportunities (POs) for one PF, and N represents the total number of paging frames (PFs) within a DRX cycle (e.g., T frames). In addition, N o is assigned to one NES PF (e.g., exists between two consecutive NES PFs). s Indicates the number of NES POs that overlap with legacy POs among the POs. Also, i_s represents the N allocated to the NES PF. s It can be defined by re-indexing using only NES POs that do not overlap with legacy POs, excluding NES POs that overlap with legacy POs among the NES POs.

[0296] In addition, when there is a NES PO overlapping with a legacy PO, the NES terminal(s) may be defined to assign a UE_ID to the legacy PO(s) based on a pre-defined formula (e.g., a legacy formula), and the NES PO overlapping with the legacy PO may be defined to follow the same UE_ID as the legacy PO. In other words, the NES terminal(s) having a UE_ID assigned to a NES PO overlapping with the legacy PO (e.g., an NES terminal(s) having the same UE_ID as the legacy PO) may be defined to monitor the NES PO overlapping with the legacy PO. On the other hand, the NES terminal(s) having other UE_IDs may be defined to determine the NES PO to monitor based on Equation 5.

[0297] Additionally, if the base station does not separately indicate a parameter (e.g., firstPDCCH-MonitoringOccasionOfPO-r19) indicating the start OFDM symbol of the NES PO(s) through the NES paging configuration, the terminal may expect the NES PO(s) to be allocated as follows.

[0298] Specifically, the first NES PO can be defined to be allocated from the first OFDM symbol of the first slot of the frame in which the NES PF is indicated. In addition, the following (N s -1) NES POs can be defined to be sequentially placed in the OFDM symbol immediately following the termination of the preceding NES PO. In this case, if one or more NES POs overlap (fully or partially) with a legacy PO, the one or more NES POs can be defined to be dropped. In this case, the NES PO(s) to be dropped can be defined to be additionally placed starting from the OFDM symbol immediately following the last NES PO (taking into account the positions of the NES PO(s) to be dropped). Afterwards, finally, N sThe above-described operation can be repeated until valid NES POs are allocated. In other words, since additional allocation of the dropped NES PO(s) may result in (full or partial) overlap with legacy POs, the one or more NES POs are dropped and can be defined to be additionally allocated after the last NES PO (taking into account the positions of the dropped NES PO(s)). Afterwards, the non-dropped NES PO(s) (e.g., valid NES PO(s)) are indexed, excluding the dropped NES POs, and the result can be used as a PO index (e.g., i_s).

[0299] Using the method described above, the formula for assigning UE_ID to NES PO is a conventional mathematical formula (e.g., i_s=floor(UE_ID / N) mod N s )) can be defined to use.

[0300] FIG. 14 illustrates NES paging opportunity (PO) allocation according to an embodiment of the present disclosure.

[0301] Referring to FIG. 14, it is assumed that NES POs and legacy POs are allocated using the same frequency resources. In this regard, both legacy POs and NES POs are allocated in groups of four in the same DRX cycle, and when four NES POs are allocated consecutively, the PO at the frontmost part overlaps with the legacy PO and is dropped. Thereafter, when additional allocation is made after the last NES PO, it overlaps with the legacy PO again and is dropped, and the last NES PO can be allocated in the next position. Thereafter, indexing (e.g., PO indexing) can be performed using the remaining NES PO(s) excluding the dropped NES PO(s).

[0302] FIG. 15 and FIG. 16 illustrate terminal operation and base station operation in relation to signaling methods related to paging according to embodiments of the present disclosure described above.

[0303] FIG. 15 is a diagram for explaining the operation of a terminal in a wireless communication system according to an embodiment of the present disclosure.

[0304] Referring to FIG. 15, the terminal can receive first paging setting information for the first terminal type and second paging setting information for the second terminal type (S1510).

[0305] For example, the second terminal type may correspond to a terminal type that supports the capability for network energy saving (e.g., an NES terminal), and the first terminal type may correspond to a terminal type that does not support the capability (e.g., a legacy terminal).

[0306] Based on at least one of the first paging setting information or the second paging setting information, the terminal can perform monitoring for a paging opportunity corresponding to its terminal ID (S1520).

[0307] In this regard, if the first paging opportunities based on the first paging setting information and the second paging opportunities based on the second paging setting information partially overlap, the terminal ID assignment for the second paging opportunity overlapping the first paging opportunity may be based on the terminal ID assignment for the first paging opportunity. In other words, in this case, the terminal ID assignment for the second paging opportunity overlapping the first paging opportunity may follow the terminal ID assignment for the overlapping first paging opportunity.

[0308] For example, terminal ID assignment for the second paging opportunity can be based on a predefined rule (e.g., Equation 4) for the first terminal type, which is based on the number of first paging opportunities in the paging frame. As a specific example, the index (i_s) for the first paging opportunity can be expressed as Equation i_s = floor (UE_ID / N) mod N. scan be based on. In the mathematical formula, UE_ID represents the ID of the terminal, N is the total number of paging frames in the cycle related to the paging, and N s represents the number of first paging opportunities within the above paging frame.

[0309] Additionally, according to the present disclosure, terminal ID assignment for a second paging opportunity that does not overlap with a first paging opportunity may be based on a pre-defined rule (e.g., Equation 5) for a second terminal type based on the number of second paging opportunities that do not overlap with the first paging opportunity within a paging frame. As a specific example, the index (i_s) for the second paging opportunity may be expressed by the equation i_s = floor (UE_ID / N) mod (N s -N o ) can be based on. In the mathematical formula, UE_ID represents the ID of the terminal, N is the total number of paging frames in the cycle related to the paging, and N s is the number of second paging opportunities within the above paging frame, N o represents the number of second paging opportunities that overlap with the number of first paging opportunities within the above paging frame.

[0310] Additionally, according to the present disclosure, the overlap between the first paging opportunity and the second paging opportunity may be based on time division multiplexing (TDM) and / or frequency division multiplexing (FDM). In this regard, when the overlap is based on FDM, if the overlapping first paging opportunity and the second paging opportunity are set to the same downlink bandwidth portion (DL BWP), the location of the second paging opportunity may be specified by applying a specific frequency offset value based on the location of the first paging opportunity. Additionally or alternatively, the overlapping first paging opportunity and the second paging opportunity may be set to different downlink bandwidth portions.

[0311] Additionally, according to the present disclosure, the first paging configuration information and the second paging configuration information can be individually set for each terminal. For example, the NES paging configuration information can be set independently / separately from the legacy paging configuration information.

[0312] Additionally, according to the present disclosure, the number of second paging opportunities per cycle associated with paging may be set to be greater than or equal to the number of first paging opportunities per cycle associated with paging (e.g., a DRX cycle or a paging cycle).

[0313] The method described in the example of FIG. 15 can be performed by the first device (100) of FIG. 17. That is, the terminal of FIG. 15 can be implemented as the first device (100). For example, one or more processors (102) of the first device (100) of FIG. 17 can be configured to receive first paging setting information for a first terminal type and second paging setting information for a second terminal type through one or more transceivers (106), and to perform monitoring for paging opportunities corresponding to the terminal ID.

[0314] Furthermore, one or more memories (104) of the first device (100) may store instructions for performing the method described in the example of FIG. 15 or the examples described above when executed by one or more processors (102).

[0315] FIG. 16 is a diagram for explaining the operation of a base station in a wireless communication system to which the present disclosure can be applied.

[0316] Referring to FIG. 16, the base station can transmit first paging setting information for the first terminal type and second paging setting information for the second terminal type (S1610).

[0317] For example, the second terminal type may correspond to a terminal type that supports the capability for network energy saving (e.g., an NES terminal), and the first terminal type may correspond to a terminal type that does not support the capability (e.g., a legacy terminal).

[0318] Based on at least one of the first paging setting information or the second paging setting information, the base station can transmit a paging signal in at least one paging opportunity (S1620).

[0319] In this regard, if the first paging opportunities based on the first paging setting information and the second paging opportunities based on the second paging setting information partially overlap, the terminal ID assignment for the second paging opportunity overlapping the first paging opportunity may be based on the terminal ID assignment for the first paging opportunity. In other words, in this case, the terminal ID assignment for the second paging opportunity overlapping the first paging opportunity may follow the terminal ID assignment for the overlapping first paging opportunity.

[0320] Specific features such as TDM and / or FDM-based overlapping between paging opportunities, terminal ID allocation / mapping for the first paging opportunity and / or the second paging opportunity and pre-defined rules related thereto, method of setting / providing paging configuration information, density of paging opportunities, etc. are the same as those described with reference to FIG. 15, and therefore, redundant descriptions are omitted.

[0321] The method described in the example of FIG. 16 can be performed by the second device (200) of FIG. 17. That is, the base station of FIG. 16 can be implemented as the second device (200). For example, one or more processors (202) of the second device (200) of FIG. 17 can be configured to transmit first paging configuration information for a first terminal type and second paging configuration information for a second terminal type through one or more transceivers (206), and to transmit a paging signal at at least one paging opportunity.

[0322] Furthermore, one or more memories (204) of the second device (200) may store instructions for performing the method described in the example of FIG. 16 or the examples described above when executed by one or more processors (202).

[0323] The operation of the NES terminal described in the present disclosure to distribute and apply the UE_ID can be interpreted as an operation of distributing the UE_ID to determine the PF index value and the PO index value. In addition, the proposed methods of the present disclosure can be extended and applied to FDM-based PO (e.g., FDMed PO) and / or TDM-based PO (e.g., TDMed PO). In addition, the proposed methods based on the NES terminal described in the present disclosure and / or NES PF / PO 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 the wireless communication system supporting NES.

[0324] 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.

[0325] General devices to which the present disclosure may be applied

[0326] FIG. 17 illustrates a block diagram of a wireless communication device according to one embodiment of the present disclosure.

[0327] Referring to FIG. 17, 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).

[0328] 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.

[0329] 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).

[0330] 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.

[0331] 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.

[0332] 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.

[0333] 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.

[0334] 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.

[0335] 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.

[0336] 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.

[0337] 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.

[0338] 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.

[0339] 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.

[0340] 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, by a terminal, first paging setting information for a first terminal type and second paging setting information for a second terminal type; and A step of monitoring a paging opportunity corresponding to a terminal ID (identifier) of the terminal based on at least one of the first paging setting information or the second paging setting information by the terminal, The above second terminal type corresponds to a terminal type that supports the ability to save network energy. A method in which terminal ID assignment for a second paging opportunity overlapping with a first paging opportunity is based on the terminal ID assignment for the first paging opportunity, based on the partial overlap between the first paging opportunities by the first paging setting information and the second paging opportunities by the second paging setting information.

2. In paragraph 1, A method wherein terminal ID assignment for the second paging opportunity is based on a rule pre-defined for the first terminal type, which is based on the number of first paging opportunities within a paging frame.

3. In paragraph 2, The index (i_s) for the first paging opportunity is based on the following mathematical formula: [Mathematical formula] i_s = floor (UE_ID / N) mod N s In the above mathematical formula, UE_ID represents the ID of the terminal, N represents the total number of paging frames in the cycle related to the paging, and N s A method in which the number of first paging opportunities within the paging frame is indicated.

4. In paragraph 1, A method for assigning terminal IDs for second paging opportunities that do not overlap with the first paging opportunity, based on a rule predefined for the second terminal type, based on the number of second paging opportunities that do not overlap with the first paging opportunity within a paging frame.

5. In paragraph 4, The index (i_s) for the second paging opportunity is based on the following mathematical formula: [Mathematical formula] i_s = floor (UE_ID / N) mod (N s -N o ) In the above mathematical formula, UE_ID represents the ID of the terminal, N represents the total number of paging frames in the cycle related to the paging, and N s is the number of second paging opportunities within the above paging frame, N o A method in which the number of second paging opportunities overlapping with the first paging opportunity within the paging frame is indicated.

6. In paragraph 1, The overlap between the first paging opportunity and the second paging opportunity is based on time division multiplexing.

7. In paragraph 1, The overlap between the first paging opportunity and the second paging opportunity is based on frequency division multiplexing.

8. In paragraph 7, A method wherein the location of the second paging opportunity is specified by applying a specific frequency offset value based on the location of the first paging opportunity, based on the overlapping first paging opportunity and the second paging opportunity being set to the same downlink bandwidth part.

9. In paragraph 7, A method wherein the overlapping first paging opportunity and the second paging opportunity are set to different downlink bandwidth portions.

10. In paragraph 1, A method wherein the first paging setting information and the second paging setting information are individually set for the terminal.

11. In paragraph 1, A method wherein the number of second paging opportunities per cycle associated with paging is set to be greater than or equal to the number of first paging opportunities per cycle associated with said paging.

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 first paging setting information for a first terminal type and second paging setting information for a second terminal type; Based on at least one of the first paging setting information or the second paging setting information, monitoring is performed for a paging opportunity corresponding to the terminal ID (identifier) of the terminal. The above second terminal type corresponds to a terminal type that supports the ability to save network energy. A device in which terminal ID assignment for a second paging opportunity overlapping with a first paging opportunity is based on the terminal ID assignment for the first paging opportunity, based on the partial overlap between the first paging opportunities by the first paging setting information and the second paging opportunities by the second paging setting information.

13. A step of transmitting, by the base station, first paging setting information for the first terminal type and second paging setting information for the second terminal type; and A step of transmitting a paging signal at at least one paging opportunity based on at least one of the first paging setting information or the second paging setting information by the base station, The above second terminal type corresponds to a terminal type that supports the ability to save network energy. A method in which terminal ID (identifier) assignment for a second paging opportunity overlapping with a first paging opportunity is based on the terminal ID assignment for the first paging opportunity, based on the partial overlap between the first paging opportunities by the first paging setting information and the second paging opportunities by the second paging setting information.

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: Transmit first paging setting information for the first terminal type and second paging setting information for the second terminal type; Set to transmit a paging signal at at least one paging opportunity based on at least one of the first paging setting information or the second paging setting information, The above second terminal type corresponds to a terminal type that supports the ability to save network energy. A device in which, based on the partial overlap between the first paging opportunities by the first paging setting information and the second paging opportunities by the second paging setting information, terminal ID (identifier) assignment for the second paging opportunity overlapping with the first paging opportunity is based on the terminal ID assignment for the first paging opportunity.

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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