Method and apparatus for semi-persistent scheduling transmission or reception based on cell discontinuous transmission or cell discontinuous reception in wireless communication system

Abstract

Disclosed are a method and an apparatus for semi-persistent scheduling (SPS) transmission or reception based on cell discontinuous transmission (DTX) and / or cell discontinuous reception (DRX) in a wireless communication system. A method according to one embodiment of the present disclosure may comprise the steps of: receiving, by a terminal, one or more first SPS downlink channels from a network during an active period of cell DTX; and receiving, by the terminal, one or more second SPS downlink channels from the network during a non-active period of the cell DTX. A value of one or more transmission parameters on which the one or more first SPS downlink channels are based and a value of the one or more transmission parameters on which the one or more second SPS downlink channels are based may be different.

Description

Method and apparatus for semi-persistent scheduling transmission or reception based on cell discontinuous transmission or cell discontinuous reception in a wireless communication system

[0001] The present disclosure relates to a wireless communication system, and more specifically to a semi-persistent scheduling (SPS) transmission or reception method and apparatus based on cell discontinuous transmission (DTX) and / or cell discontinuous reception (DRX).

[0002] Mobile communication systems were developed to provide voice services while ensuring user mobility. However, mobile communication systems have expanded their scope to include data services as well as voice. Currently, due to the explosive increase in traffic leading to resource shortages and users demanding higher-speed services, more advanced mobile communication systems are required.

[0003] The requirements for next-generation mobile communication systems largely include the ability to accommodate explosive data traffic, a dramatic increase in transmission rates per user, a significantly increased number of connected devices, very low end-to-end latency, and high energy efficiency. To achieve this, various technologies are being researched, such as dual connectivity, massive multiple input multiple output (MMIMO), 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 apparatus for transmitting or receiving SPS based on cell DTX and / or cell DRX.

[0005] The technical problems to be solved in this disclosure are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which this disclosure belongs from the description below.

[0006] A method according to one embodiment of the present disclosure may include the step of receiving one or more first semi-persistent scheduling (SPS) downlink channels from a network by a terminal during an active period of discontinuous transmission (DTX); and the step of receiving one or more second SPS downlink channels from the network by the terminal during a non-active period of the cell DTX. The value of one or more transmission parameters on which the one or more first SPS downlink channels are based and the value of one or more transmission parameters on which the one or more second SPS downlink channels are based may be different.

[0007] A method according to another embodiment of the present disclosure may include the step of transmitting one or more first semi-persistent scheduling (SPS) downlink channels to a terminal by a base station during an active period of discontinuous transmission (DTX) of a cell; and the step of transmitting one or more second SPS downlink channels to the terminal by the base station during a non-active period of the cell DTX. The value of one or more transmission parameters on which the one or more first SPS downlink channels are based and the value of one or more transmission parameters on which the one or more second SPS downlink channels are based may be different.

[0008] According to the present disclosure, a method and apparatus for transmitting or receiving SPS based on cell DTX and / or cell DRX may be provided.

[0009] The effects obtainable from the present disclosure are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art to which the present disclosure belongs from the description below.

[0010] The accompanying drawings, which are included as part of the detailed description to aid in understanding the present disclosure, provide embodiments of the present disclosure and explain the technical features of the present disclosure together with the detailed description.

[0011] FIG. 1 illustrates the structure of a wireless communication system to which the present disclosure can be applied.

[0012] FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure may be applied.

[0013] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure may be applied.

[0014] FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure may be applied.

[0015] FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure may be applied.

[0016] FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure may be applied, and a general method of transmitting and receiving signals using these channels.

[0017] FIG. 7 is a diagram illustrating a DRX cycle in an RRC_CONNECTED state to which the present disclosure can be applied.

[0018] FIG. 8 illustrates an example of a cell DTX / DRX operation to which some examples of the present disclosure may be applied.

[0019] FIG. 9 is a drawing for explaining an example of a method performed by a terminal according to the present disclosure.

[0020] FIG. 10 is a drawing illustrating an example of a method performed by a base station according to the present disclosure.

[0021] FIG. 11 is a drawing illustrating a block diagram of a wireless communication device according to one embodiment of the present disclosure.

[0022] Hereinafter, preferred embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. The detailed description disclosed below, together with the accompanying drawings, is intended to describe exemplary embodiments of the present disclosure and is not intended to represent the only embodiment in which the present disclosure may be practiced. The following detailed description includes specific details to provide a complete understanding of the present disclosure. However, those skilled in the art will know that the present disclosure may be practiced without such specific details.

[0023] In some cases, to avoid obscuring the concept of the present disclosure, known structures and devices may be omitted or illustrated in the form of a block diagram focusing on the core functions of each structure and device.

[0024] In the present disclosure, when a component is described as being “connected,” “combined,” or “joined” with another component, this may include not only a direct connection but also an indirect connection in which another component exists between them. Furthermore, in the present disclosure, the terms “comprising” or “having” specify the presence of the mentioned features, steps, actions, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, actions, elements, components, and / or groups thereof.

[0025] In the present disclosure, terms such as "first," "second," etc. are used solely for the purpose of distinguishing one component from another and are not used to limit the components, nor do they limit the order or importance of the components unless specifically stated otherwise. Accordingly, within the scope of the present disclosure, a first component in one embodiment may be referred to as a second component in another embodiment, and likewise, a second component in one embodiment may be referred to as a first component in another embodiment.

[0026] The terms used in this disclosure are for the description of specific embodiments and are not intended to limit the claims. As used in the description of embodiments and in the appended claims, the singular form is intended to include the plural form unless the context clearly indicates otherwise. The term "and / or" as used in this disclosure may refer to any one of the related enumerated items, or refers to and includes any and all possible combinations of two or more of them. Additionally, the " / " between words in this disclosure has the same meaning as "and / or" unless otherwise noted.

[0027] 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 the process of controlling the network and transmitting or receiving signals by a device (e.g., a base station) governing the wireless communication network, or in the process of transmitting or receiving signals with or between the network and terminals by a terminal connected to the wireless network.

[0028] In the present disclosure, transmitting or receiving a channel includes the meaning of transmitting or receiving information or a signal through said 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.

[0029] In the following, the downlink (DL) refers to communication from a base station to a terminal, and the uplink (UL) refers to communication from a terminal to a base station. In the downlink, the transmitter may be part of the base station, and the receiver may be part of the terminal. In the uplink, the transmitter may be part of the terminal, and the receiver may be part of the base station. The base station may be referred to as the first communication device, and the terminal as the second communication device. The term base station (BS) may be replaced by terms such as fixed station, Node B, eNB (evolved-NodeB), gNB (Next Generation NodeB), BTS (base transceiver system), Access Point (AP), network (5G network), AI (Artificial Intelligence) system / module, RSU (roadside 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, drone (UAV: Unmanned Aerial Vehicle), AR (Augmented Reality) device, VR (Virtual Reality) device.

[0030] The following technologies can be used in various wireless access systems such as CDMA, FDMA, TDMA, OFDMA, and SC-FDMA. CDMA can be implemented using wireless technologies such as UTRA (Universal Terrestrial Radio Access) or CDMA2000. TDMA can be implemented using wireless technologies such as GSM (Global System for Mobile Communications), GPRS (General Packet Radio Service), and EDGE (Enhanced Data Rates for GSM Evolution). OFDMA can be implemented using wireless technologies such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, and E-UTRA (Evolved UTRA). UTRA is part of the UMTS (Universal Mobile Telecommunications System). 3GPP (3rd Generation Partnership Project) LTE (Long Term Evolution) is part of E-UMTS (Evolved UMTS) using E-UTRA, and LTE-A (Advanced) / LTE-A pro is an evolved version of 3GPP LTE. 3GPP NR (New Radio or New Radio Access Technology) is an evolved version of 3GPP LTE / LTE-A / LTE-A pro.

[0031] For clarity of explanation, the description is based on 3GPP communication systems (e.g., LTE-A, NR), but the technical scope of this disclosure is not limited thereto. LTE refers to technology from 3GPP Technical Specification (TS) 36.xxx Release 8 onwards. Specifically, LTE technology from 3GPP TS 36.xxx Release 10 onwards is referred to as LTE-A, and LTE technology from 3GPP TS 36.xxx Release 13 onwards is referred to as LTE-A pro. 3GPP NR refers to technology from TS 38.xxx Release 15 onwards. LTE / NR may be referred to as a 3GPP system. "xxx" indicates a specific standard document number. LTE / NR may be collectively referred to as a 3GPP system. Regarding background technology, terms, abbreviations, etc. used in the description of this disclosure, reference may be made to matters described in standard documents published prior to this disclosure. For example, the following documents may be referenced.

[0032] For 3GPP LTE, refer to 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).

[0033] For 3GPP NR, you may refer to 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 (General Description of NR and NG-RAN (New Generation-Radio Access Network)), and TS 38.331 (Radio Resource Control Protocol Specification).

[0034] Abbreviations of terms that may be used in this disclosure are defined as follows.

[0035] - BM: Beam management

[0036] - CQI: Channel quality indicator

[0037] - CRI: Channel State Information - Reference Signal Resource Indicator

[0038] - CSI: Channel state information

[0039] - CSI-IM: Channel state information - interference measurement

[0040] - CSI-RS: Channel state information - reference signal

[0041] - DMRS: demodulation reference signal

[0042] - FDM: Frequency Division Multiplexing

[0043] - FFT: Fast Fourier Transform

[0044] - IFDMA: Interleaved frequency division multiple access

[0045] - IFFT: Inverse Fast Fourier Transform

[0046] - L1-RSRP: Layer 1 reference signal received power

[0047] - L1-RSRQ: Layer 1 reference signal received quality

[0048] - MAC: Medium Access Control

[0049] - NZP: Non-zero power

[0050] - OFDM: Orthogonal Frequency Division Multiplexing

[0051] - PDCCH: Physical downlink control channel

[0052] - PDSCH: Physical downlink shared channel

[0053] - PMI: Precoding Matrix Indicator

[0054] - RE: resource element

[0055] - RI: Rank indicator

[0056] - RRC: Radio Resource Control

[0057] - RSSI: Received signal strength indicator

[0058] - Rx: Reception

[0059] - QCL: quasi co-location

[0060] - SINR: Signal to interference and noise ratio

[0061] - SSB (or SS / PBCH block): Synchronization signal block (including primary synchronization signal (PSS), secondary synchronization signal (SSS), and physical broadcast channel (PBCH))

[0062] - TDM: Time Division Multiplexing

[0063] - TRP: transmission and reception point

[0064] - TRS: Tracking Reference Signal

[0065] - Tx: transmission

[0066] - UE: User equipment

[0067] - ZP: Zero Power

[0068] General System

[0069] As more communication devices require greater communication capacity, the need for enhanced mobile broadband communication compared to existing radio access technology (RAT) is emerging. Furthermore, Massive Machine Type Communications (MTC), which connects multiple devices and objects to provide various services anytime and anywhere, is also one of the major issues to be considered in next-generation communication. In addition, communication system designs that take into account services and terminals sensitive to reliability and latency are being discussed. As such, the introduction of next-generation RATs considering eMBB (enhanced mobile broadband communication), mMTC (massive MTC), and URLLC (Ultra-Reliable and Low Latency Communication) is being discussed, and for convenience, this technology is referred to as NR in this specification. NR is an expression representing an example of 5G RAT.

[0070] A new RAT system including NR uses an OFDM transmission method or a similar transmission method. The new RAT system may follow OFDM parameters different from those of LTE. Alternatively, the new RAT system may follow the existing LTE / LTE-A numerology but support a larger system bandwidth (e.g., 100 MHz). Or, a single cell may support multiple numerologies. That is, terminals operating with different numerologies can coexist within a single cell.

[0071] Numerology corresponds to a single subcarrier spacing in the frequency domain. Different numerologies can be defined by scaling the reference subcarrier spacing to an integer N.

[0072] FIG. 1 illustrates the structure of a wireless communication system to which the present disclosure can be applied.

[0073] Referring to FIG. 1, the NG-RAN consists of gNBs that provide NG-RA (NG-Radio Access) user plane (i.e., new access stratum (AS) sublayer / PDCP (Packet Data Convergence Protocol) / RLC (Radio Link Control) / MAC / PHY) and control plane (RRC) protocol endpoints for the UE. The gNBs are interconnected via Xn interfaces. The gNBs are also connected to the NGC (New Generation Core) via NG interfaces. More specifically, the gNBs are connected to the AMF (Access and Mobility Management Function) via N2 interfaces and to the UPF (User Plane Function) via N3 interfaces.

[0074] FIG. 2 illustrates a frame structure in a wireless communication system to which the present disclosure may be applied.

[0075] An NR system can support multiple numerologies. Here, the numerology can be defined by subcarrier spacing and cyclic prefix (CP) overhead. In this case, multiple subcarrier spacings can be derived by scaling the base (reference) subcarrier spacing by an integer N (or μ). Furthermore, the numerology used can be selected independently of the frequency band, even if it is assumed that very low subcarrier spacings are not used at very high carrier frequencies. Additionally, various frame structures based on multiple numerologies can be supported in an NR system.

[0076] Below, we examine the OFDM numerologies and frame structures that can be considered in NR systems. Many OFDM numerologies supported in NR systems can be defined as shown in Table 1 below.

[0077] μΔf=2 μ ·15 [kHz]CP015 Normal 130 Normal 260 Normal, Extended 3120 Normal 4240 Normal

[0078] NR supports multiple numerologies (or subcarrier spacing (SCS)) to support various 5G services. For example, when the SCS is 15 kHz, it supports a wide area in traditional cellular bands; when the SCS is 30 kHz / 60 kHz, it supports dense-urban, lower latency, and wider carrier bandwidth; and when the SCS is 60 kHz or higher, it supports a bandwidth greater than 24.25 GHz to overcome phase noise.

[0079] The NR frequency band is defined by two types of frequency ranges (FR1, FR2). FR1 and FR2 can be configured as shown in Table 2 below. Additionally, FR2 may refer to millimeter wave (mmW).

[0080] Frequency Range Designation Corresponding Frequency Range Subcarrier Spacing FR1 4 10MHz - 7125MHz 15, 30, 60kHz FR2 24 250MHz - 52600MHz 60, 120, 240kHz

[0081] Regarding the frame structure in an NR system, the magnitude of various fields in the time domain is T c =1 / (Δf max ·N f It is expressed as a multiple of the time unit of ). Here, Δf max =480·10 3 Hz and N f = 4096. Downlink and uplink transmission is T f =1 / (Δf max N f / 100)·T c It is organized into radio frames having an interval of = 10ms. Here, each radio frame is T sf =(Δf max N f / 1000)·T c =1ms It consists of 10 subframes having the interval. In this case, there may be one set of frames for the uplink and one set of frames for the downlink. Additionally, the transmission at uplink frame number i from the terminal is T before the start of the corresponding downlink frame at the terminal.TA =(N TA +N TA,offset )T c Must start previously. For a subcarrier spacing configuration μ, the slots are n within the subframe. s μ ∈{0,..., N slot Numbered in increasing order of {subframe,μ-1}, and n within the radio frame s,f μ ∈{0,..., N slot frame,μ Numbers are assigned in increasing order of {-1}. One slot is N symb slot It consists of consecutive OFDM symbols of, and N symb slot is determined by CP. Slot n in the subframe s μ The start is OFDM symbol n in the same subframe. s μ N symb slot It is aligned with the start and time of. Not all terminals can transmit and receive simultaneously, which means that not all OFDM symbols in the downlink slot or uplink slot can be used.

[0082] Table 3 shows the number of OFDM symbols per slot in a standard CP (N symb slot ), number of slots per wireless frame (N slot frame,μ ), number of slots per subframe (N slot Table 4 shows the number of OFDM symbols per slot, the number of slots per wireless frame, and the number of slots per subframe in the extended CP.

[0083] μN symb slot N slot frame,μ N slotsubframe,μ01410111420221440431480841416016

[0084] μN symb slot N slot frame,μ N slot subframe,μ212404

[0085] FIG. 2 is an example of the case where μ=2 (SCS is 60 kHz), and referring to Table 3, 1 subframe can contain 4 slots. The 1 subframe={1,2,4} slot shown 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. Additionally, a mini-slot can contain 2, 4, or 7 symbols, or more or fewer symbols.

[0086] Regarding physical resources in an NR system, antenna ports, resource grids, resource elements, resource blocks, and carrier parts may be considered. Below, we will examine in detail the aforementioned physical resources that can be considered in an NR system.

[0087] First, regarding antenna ports, an antenna port is defined such that the channel carrying a symbol on the antenna port can be inferred from the channel carrying another symbol on the same antenna port. If the large-scale property of the channel carrying a symbol on one antenna port can be inferred from the channel carrying a symbol on another antenna port, the two antenna ports can be said to be in a QC / QCL (quasi-co-located or quasi-co-location) relationship. Here, the large-scale property includes one or more of delay spread, Doppler spread, frequency shift, average received power, and received timing.

[0088] FIG. 3 illustrates a resource grid in a wireless communication system to which the present disclosure may be applied.

[0089] Referring to Fig. 3, the resource grid N in the frequency domain RB μ N sc RB It consists of subcarriers, and one subframe is 14.2 μ It is described by way of example that it consists of OFDM symbols, but is not limited thereto. In an NR system, the transmitted signal is N RB μ N sc RB One or more resource grids composed of subcarriers and 2 μ N symb (μ) It is described by the OFDM symbols of. Here, N RB μ ≤ N RB max,μ It is. The above N RB max,μrepresents the maximum transmission bandwidth, which can vary not only between numerologies but also between uplink and downlink. In this case, a single resource grid can be established for each 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 the index pair (k, It is uniquely identified by ). Here, k=0,...,N RB μ N sc RB -1 is an index in the frequency domain, and =0,...,2 μ N symb (μ) -1 refers to the location of a symbol within a subframe. When referring to resource elements in a slot, an index pair (k,l) is used. Here, l=0,...,N symb μ It is -1. Resource factor (k) for μ and antenna port p ) is a complex value It corresponds to. If there is no risk of confusion or if a specific antenna port or numerology is not specified, the indices p and μ may be dropped, and the resulting complex value is or This can be. In addition, the resource block (RB) is N in the frequency domain. sc RB =12 is defined by consecutive subcarriers.

[0090] Point A serves as a common reference point for the resource block grid and is acquired as follows.

[0091] - OffsetToPointA for the Primary Cell (PCell) downlink represents the frequency offset between point A and the lowest subcarrier of the lowest resource block that overlaps with the SS / PBCH block used by the terminal for initial cell selection. It is expressed in resource block units assuming a 15 kHz subcarrier interval for FR1 and a 60 kHz subcarrier interval for FR2.

[0092] - absoluteFrequencyPointA represents the frequency-location of point A as expressed in ARFCN (absolute radio-frequency channel number).

[0093] Common resource blocks are numbered from 0 upward in the frequency domain for a subcarrier spacing setting μ. The center of subcarrier 0 of common resource block 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 element (k,l) and the subcarrier spacing setting μ is given as Equation 1 below.

[0094]

[0095] In Equation 1, k is defined relative to point A such that k=0 corresponds to a subcarrier centered at point A. Physical resource blocks range from 0 to N within the bandwidth part (BWP). BWP,i size,μ Numbers are assigned up to -1, and i is the BWP number. Physical resource block n in BWP i PRB and common resource block n CRB The relationship between them is given by the following mathematical formula 2.

[0096]

[0097] N BWP,i start,μ is a common resource block where BWP starts relative to common resource block 0.

[0098] FIG. 4 illustrates a physical resource block in a wireless communication system to which the present disclosure may be applied. FIG. 5 illustrates a slot structure in a wireless communication system to which the present disclosure may be applied.

[0099] Referring to FIGS. 4 and 5, a slot contains multiple symbols in the time domain. For example, in the case of a standard CP, one slot contains 7 symbols, but in the case of an extended CP, one slot contains 6 symbols.

[0100] A carrier includes multiple subcarriers in the frequency domain. A Resource Block (RB) is defined as multiple (e.g., 12) consecutive subcarriers in the frequency domain. A Bandwidth Part (BWP) 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 may include up to N (e.g., 5) BWPs. Data communication is performed through the active BWPs, and only one BWP can be active for a single terminal. In the resource grid, each element is referred to as a Resource Element (RE) and can be mapped to a single complex symbol.

[0101] NR systems can support up to 400 MHz per Component Carrier (CC). If a terminal operating in such a wideband CC always keeps its radio frequency (RF) chip turned on for the entire CC, the terminal's battery consumption may increase. Alternatively, considering various use cases operating within a single wideband CC (e.g., eMBB, URLLC, Mmtc, V2X, etc.), different numerologies (e.g., subcarrier spacing) may be supported for each frequency band within that CC. Or, the capability regarding maximum bandwidth may vary by terminal. Taking this into account, the base station may instruct the terminal to operate only on a portion of the bandwidth rather than the entire bandwidth of the wideband CC, and for convenience, this portion of bandwidth is defined as the bandwidth part (BWP). A BWP can consist of consecutive RBs on the frequency axis and can correspond to a single numerology (e.g., subcarrier spacing, CP length, slot / mini-slot interval).

[0102] Meanwhile, the base station may configure multiple BWPs within a single CC configured for a terminal. For example, a BWP occupying a relatively small frequency range may be configured in the PDCCH monitoring slot, and the PDSCH indicated by the PDCCH may be scheduled on a larger BWP. Alternatively, if UEs are concentrated on a specific BWP, some terminals may be configured to a different BWP for load balancing. Or, considering frequency domain inter-cell interference cancellation between neighboring cells, a portion of the spectrum in the middle of the total bandwidth may be excluded, and both BWPs may be configured within the same slot. That is, the base station may configure at least one DL / UL BWP for a terminal associated with a broadband CC. The base station may activate at least one DL / UL BWP among the DL / UL BWP(s) configured at a specific time (by L1 signaling, MAC CE (Control Element), or RRC signaling, etc.). Additionally, the base station may instruct a switch to another configured DL / UL BWP (by L1 signaling, MAC CE, RRC signaling, etc.). Alternatively, a switch to a defined DL / UL BWP may occur based on a timer when the timer value expires. In this case, the activated DL / UL BWP is defined as the active DL / UL BWP. However, since the terminal may not receive the configuration for the DL / UL BWP in situations such as when the terminal is performing the initial access process or before the RRC connection is set up, the DL / UL BWP assumed by the terminal in such situations is defined as the initial active DL / UL BWP.

[0103] FIG. 6 illustrates physical channels used in a wireless communication system to which the present disclosure may be applied, and a general method of transmitting and receiving signals using these channels.

[0104] In a wireless communication system, a terminal receives information from a base station via the downlink and transmits information to the base station via the uplink. The information transmitted and received by the base station and the terminal includes data and various control information, and various physical channels exist depending on the type and purpose of the information being transmitted and received.

[0105] When the terminal is powered on or enters a new cell, it performs an initial cell search operation, such as synchronizing with the base station (S601). To this end, the terminal receives a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS) from the base station to synchronize with the base station and obtain information such as a cell identifier (ID). Subsequently, the terminal receives a Physical Broadcast Channel (PBCH) from the base station to obtain broadcast information within the cell. Meanwhile, during the initial cell search phase, the terminal receives a Downlink Reference Signal (DL RS) to check the downlink channel status.

[0106] A terminal that has completed initial cell search can obtain more specific system information by receiving a Physical Downlink Control Channel (PDCCH) and a Physical Downlink Shared Channel (PDSCH) according to the information carried on the PDCCH (S602).

[0107] Meanwhile, when a terminal first connects to a base station or when there are no wireless resources available for signal transmission, the terminal may perform a Random Access Procedure (RACH) with respect to the base station (steps S603 to S606). To do this, the terminal transmits a specific sequence as a preamble through a Physical Random Access Channel (PRACH) (S603 and S605), and may receive a response message for the preamble through a PDCCH and a corresponding PDSCH (S604 and S606). In the case of a contention-based RACH, a Contention Resolution Procedure may additionally be performed.

[0108] A terminal that has performed the procedure described above may subsequently perform PDCCH / PDSCH reception (S607) and Physical Uplink Shared Channel (PUSCH) / Physical Uplink Control Channel (PUCCH) transmission (S608) as a general uplink / downlink signal transmission procedure. In particular, the terminal receives Downlink Control Information (DCI) through the PDCCH. Here, the DCI includes control information such as resource allocation information for the terminal, and its format varies depending on its purpose of use.

[0109] Meanwhile, control information transmitted by the terminal to the base station via the uplink or received by the terminal from the base station includes downlink / uplink ACK / NACK (Acknowledgement / Non-Acknowledgement) signals, CQI (Channel Quality Indicator), PMI (Precoding Matrix Indicator), RI (Rank Indicator), etc. In the case of a 3GPP LTE system, the terminal may transmit the aforementioned control information, such as CQI / PMI / RI, via PUSCH and / or PUCCH.

[0110] Table 5 shows an example of the DCI format in an NR system.

[0111] DCI Format Utilization 0_0 Scheduling of PUSCH within a single cell 0_1 Scheduling of one or multiple PUSCH within a single cell, or instructing the UE with cell group (CG) downlink feedback information 0_2 Scheduling of PUSCH within a single cell 1_0 Scheduling of PDSCH within a single DL cell 1_1 Scheduling of PDSCH within a single cell 1_2 Scheduling of PDSCH within a single cell

[0112] Referring to Table 5, DCI formats 0_0, 0_1, and 0_2 may include resource information related to PUSCH scheduling (e.g., UL / SUL (Supplementary UL), frequency resource allocation, time resource allocation, frequency hopping, etc.), information related to Transport Blocks (TB: Transport Block) (e.g., MCS (Modulation Coding and Scheme), NDI (New Data Indicator), RV (Redundancy Version), etc.), information related to Hybrid - Automatic Repeat and request (e.g., process number, DAI (Downlink Assignment Index), PDSCH-HARQ feedback timing, etc.), information related to multiple antennas (e.g., DMRS sequence initialization information, antenna port, CSI request, etc.), and power control information (e.g., PUSCH power control, etc.), and the control information included in each DCI format may be predefined.

[0113] DCI format 0_0 is used for PUSCH scheduling in a cell. The information contained in DCI format 0_0 is transmitted after being scrambled by CRC (cyclic redundancy check) by C-RNTI (Cell RNTI: Cell Radio Network Temporary Identifier), CS-RNTI (Configured Scheduling RNTI), or MCS-C-RNTI (Modulation Coding Scheme Cell RNTI).

[0114] DCI format 0_1 ​​is used to instruct a terminal on the scheduling of one or more PUSCHs in a cell, or configured grant (CG) downlink feedback information. The information contained 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.

[0115] DCI format 0_2 is used for scheduling PUSCH in a single cell. The information contained in DCI format 0_2 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, SP-CSI-RNTI, or MCS-C-RNTI.

[0116] Next, DCI formats 1_0, 1_1, and 1_2 may include resource information related to PDSCH scheduling (e.g., frequency resource allocation, time resource allocation, VRB (virtual resource block)-PRB (physical resource block) mapping, etc.), transmission block (TB) related information (e.g., MCS, NDI, RV, etc.), HARQ related information (e.g., process number, DAI, PDSCH-HARQ feedback timing, etc.), multiple antenna related information (e.g., antenna port, TCI (transmission configuration indicator), SRS (sounding reference signal) request, etc.), PUCCH related information (e.g., PUCCH power control, PUCCH resource indicator, etc.), and the control information included in each DCI format may be predefined.

[0117] DCI format 1_0 is used for scheduling PDSCH in a single DL cell. The information contained in DCI format 1_0 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0118] DCI format 1_1 is used for scheduling PDSCH in a single cell. The information contained in DCI format 1_1 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0119] DCI format 1_2 is used for PDSCH scheduling in a single cell. The information contained in DCI format 1_2 is transmitted after being CRC scrambled by C-RNTI, CS-RNTI, or MCS-C-RNTI.

[0120] UE Discontinuous Reception (Rx)

[0121] The terminal may perform a DRX operation while performing operations according to the examples of the present disclosure. A terminal configured with DRX can reduce power consumption by receiving DL signals discontinuously. DRX may be performed in the RRC (Radio Resource Control)_IDLE state, RRC_INACTIVE state, and RRC_CONNECTED state. In the RRC_IDLE state and RRC_INACTIVE state, DRX is used to receive paging signals discontinuously. Hereinafter, DRX performed in the RRC_CONNECTED state is described (RRC_CONNECTED DRX).

[0122] FIG. 7 is a diagram illustrating a DRX cycle in an RRC_CONNECTED state to which the present disclosure can be applied.

[0123] Referring to FIG. 7, the DRX cycle consists of On-Duration and Opportunity for DRX. The DRX cycle defines a time interval during which On-Duration is repeated periodically. On-Duration represents the time interval during which the terminal monitors to receive PDCCH. When the DRX is set, the terminal performs PDCCH monitoring during On-Duration. If a PDCCH is successfully detected during PDCCH monitoring, the terminal activates an inactivity timer and remains in an awake state. If no PDCCH is successfully detected during PDCCH monitoring, the terminal enters a sleep state after On-Duration ends.

[0124] When DRX is configured, PDCCH monitoring / reception may be performed discontinuously in the time domain when performing operations according to the examples of the present disclosure. For example, when DRX is configured, PDCCH reception opportunities (e.g., slots having a PDCCH search space) may be configured discontinuously according to the DRX configuration.

[0125] If DRX is not set, PDCCH monitoring / reception can be performed continuously in the time domain. For example, if DRX is not set, PDCCH reception opportunities (e.g., slots with a PDCCH search space) can be set continuously. Meanwhile, regardless of whether DRX is set, PDCCH monitoring may be restricted in time intervals set as measurement gaps.

[0126] The DRX (or C-DRX) operation for a terminal in the RRC_CONNECTED state can be expressed in three steps. The first step may include receiving DRX configuration information via RRC signaling (e.g., MAC-CellGroupConfig IE). The second step may include receiving a DRX command via MAC CE (e.g., DRX command MAC CE or Long DRX command MAC CE). The third step may include the terminal performing PDCCH monitoring during the on-duration of the DRX cycle. That is, the DRX configuration information is received via upper layer (e.g., RRC) signaling, and the DRX ON / OFF status is controlled by a DRX command of the MAC layer. When the DRX is configured, the terminal may perform PDCCH monitoring discontinuously while performing operations according to the examples of the present disclosure, as illustrated in FIG. 7.

[0127] Here, MAC-CellGroupConfig contains configuration information necessary to set MAC parameters for a cell group. MAC-CellGroupConfig may also contain configuration information regarding DRX. For example, MAC-CellGroupConfig may include values ​​for one or more of the parameters below, or additional parameters not exemplified, to define DRX.

[0128] drx-OnDurationTimer: Length of the interval during which the terminal is awake for PDCCH monitoring at the start of the DRX cycle

[0129] drx-InactivityTimer: Length of the time interval during which the terminal remains awake after the PDCCH opportunity in which a PDCCH indicating initial UL or DL ​​data is detected.

[0130] drx-HARQ-RTT-TimerDL: Length of the maximum time interval from when the HARQ NACK feedback for the initial DL transmission is sent until the PDCCH for the DL retransmission is received (the UE sleeps / is disabled during this timer operation)

[0131] drx-HARQ-RTT-TimerUL: Length of the maximum time interval from the initial UL transmission until the PDCCH for the UL retransmission can be received (the UE sleeps / is disabled during this timer operation)

[0132] Cell discontinuous transmission (DTX) / discontinuous reception (DRX)

[0133] To reduce the downlink transmit / uplink receive activity time of a base station, periodic cell DTX / DRX patterns (e.g., active and inactive periods) may be set commonly for terminals within a cell having the corresponding feature. Here, the cell DTX pattern and the cell DRX pattern may be set and activated separately, and up to two cell DTX / DRX patterns may be set per MAC entity. When the cell DTX is set and activated, at least one of monitoring for semi-persistent scheduling (SPS) opportunities or monitoring for PDCCH may be suspended during the cell DTX inactive period. When the cell DRX is set and activated, at least one of transmitting from a configured grant (CG) resource or a scheduling request (SR) transmission may be suspended during the cell DRX inactive period. The cell DTX / DRX may be enabled / disabled via RRC signaling or L1 (layer 1) group common signaling.

[0134] Parameters such as active duration and cycle may be set for Cell DTX / DRX. Active duration is the period during which a terminal waits to transmit an SR or CG after receiving a PDCCH or SPS opportunity, and cycle may specify the periodic repetition of active duration and inactive duration. When both Cell DTX and Cell DRX are set, parameters such as active duration and cycle may be common. If the base station recognizes an emergency call or public safety-related service (e.g., Multimedia Priority Service (MPS) or Mission Critical Service (MCS)), the network may release or disable the Cell DTX / DRX settings so as not to affect the service. Additionally, at least some overlap may be required between the active period of the terminal's connected mode DRX and the active period of the Cell DTX / DRX. For example, the period of the terminal's connected mode DRX may be a multiple of the Cell DTX / DRX period, or vice versa.

[0135] To operate the base station in sleep mode for a relatively long period without frequent wake-ups, the base station's DTX / DRX was introduced for NES purposes. By configuring the cell DTX and setting the on-duration of the terminals' C-DRX within the active period of the cell DTX, the base station can reduce energy consumption by utilizing DTX transmission under low system load conditions.

[0136] FIG. 8 illustrates an example of a cell DTX / DRX operation to which some examples of the present disclosure may be applied.

[0137] The second node (120) (e.g., base station) can transmit system information to the first node (110) (e.g., terminal). Accordingly, the first node (110) can check information related to the cell DTX / DRX of the second node (120).

[0138] For example, system information may include MIB, SIB1, etc. In relation to NES technology, MIB may include information related to cell barring (e.g., cellBarred), and SIB1 may include information related to the cell barring state (e.g., cellBarredNES). For example, if cellBarred included in MIB is set to a value indicating that it is not barred (e.g., notBarred), the terminal may determine that the cell is not barred, regardless of whether it supports NES cell DTX / DRX. For example, if cellBarred included in the received MIB is set to a value indicating that the cell is barred (e.g., barred), a terminal that does not support NES cell DTX / DRX may determine that the cell is barred.

[0139] For example, if a terminal has the capability to support NES cell DTX / DRX, the terminal can check SIB1 to determine the cell blocking status. For example, if cellBarred in the MIB is set to barred and cellBarredNES is absent in SIB1, a terminal supporting NES cell DTX / DRX can treat the cell as blocked and perform cell-reselection to another cell. For example, if cellBarred in the MIB is set to barred and cellBarredNES is included in SIB1, a terminal supporting NES cell DTX / DRX can determine that the cell is not blocked.

[0140] In the example of FIG. 8, it is assumed that the terminal has the capability to support NES cell DTX / DRX, and that cellBarred in the MIB is set to notBarred or cellBarred in the MIB is set to barred, and cellBarredNES is included in SIB1. Accordingly, the terminal can perform a random access procedure to connect to the base station and then perform communication. For example, the base station can perform a cell DTX / DRX operation and transmit configuration information related to the cell DTX / DRX operation to the terminal. The configuration information related to the cell DTX / DRX operation (e.g., CellDTXDRX-Config) includes at least one parameter related to the cell DTX / DRX, and may include at least one of, for example, an on-duration timer, a cycle start offset, a slot offset, a configuration type (e.g., DTX, DRX, or DTX-DRX), and an activation state of the DTX / DRX (e.g., active, inactive). In addition, the configuration information may further include information for receiving and interpreting control information related to cell DRX / DRX (e.g., DCI-related information such as cellDTRX-RNTI included in physicalCellGroupConfig, size of DCI format 2_9, etc.).

[0141] Subsequently, the base station may transmit control information related to cell DTX / DRX to the terminal. The control information related to cell DTX / DRX may include DCI having a specified format (e.g., DCI format 2_9). When an operation for a serving cell according to at least one of cell DTX operation and cell DRX operation is configured by configuration information (e.g., cellDTXDRX-Config included in servingcell-config), the terminal may identify a set of search spaces (e.g., Type3-PDCCH CSS set) for monitoring a PDCCH that transmits control information of the specified format during the active time through an upper-level parameter (e.g., SearchSpace included in PDCCH-Config), and obtain the location of information about the serving cell within the control information through an upper-level parameter (e.g., positionInDCI-cellDTRX included in ServingCell-config). Then, the terminal may obtain the control information based on the identified set of search spaces and location.

[0142] Control information related to cell DTX / DRX may be used to indicate the activation or deactivation of cell DTX and / or cell DRX, and / or to provide NES-mode indicators (e.g., NES-specific CHO execution conditions, etc.), and may include, for example, at least one block including cell DTX / DRX indicators and NES-mode indicators. In this case, if the serving cell is set as a supplementary uplink (SUL) carrier, the instruction to activate or deactivate cell DRX by the cell DTX / DRX indicator may be applied to both the uplink (UL) carrier and the SUL carrier.

[0143] Subsequently, the terminal and the base station can communicate based on the cell DTX / DRX. Specifically, the base station can turn the transmission and reception of signals on or off according to the settings related to the cell DTX / DRX, and accordingly, the terminal can selectively monitor signals from the base station. During the DTX-OFF duration, the base station can enter sleep mode to reduce energy consumption. For example, the base station DTX cycle can be aligned with the terminal DRX cycle. The base station DTX-ON duration can fully cover the terminal's DRX-ON duration. Furthermore, for NES purposes, the base station can align transmissions on Xn (interface between base stations) / NG (interface between 5G RAN and 5G core network) with transmissions on Uu (interface between terminal and network). The DTX / DRX mechanism triggers the switching of reference signal resource set groups, and the base station may perform dormancy-like behavior of infrequently transmitting or not transmitting SSB, SIB, and CSI-RS to reduce energy consumption. Depending on the base station's configuration, the terminal may infrequently receive or not receive downlink signals / channels. Once the base station DTX / DRX operation is triggered, during the DTX / DRX OFF duration, the terminal may receive the corresponding CSI-RS, SSB, or PDCCH discontinuously.

[0144] Cell DTX / DRX-based semi-persistent scheduling send / receive

[0145] Existing SPS settings may be provided to the terminal to support periodic transmission to and periodic reception by the terminal, or to support low latency and reduce PDCCH overhead. Depending on each SPS setting, the configured / directed resources may be repeated according to a period. For example, the initial configured / directed resource allocation is repeated according to the configured period, and the terminal can perform PDSCH reception or PUSCH transmission from the allocated resources without separate PDCCH monitoring / reception.

[0146] An SPS setting provided to a single terminal can be occupied and used by that terminal. If the terminal does not perform transmission or reception on the provided SPS resource, the SPS resource cannot be used by another terminal, so there is a problem of waste.

[0147] FIG. 9 is a drawing for explaining an example of a method performed by a terminal according to the present disclosure.

[0148] In step S910, the terminal can receive one or more first SPS downlink channels from the network during the active period of the cell DTX.

[0149] In step S920, the terminal can receive one or more second SPS downlink channels from the network during the non-active period of the cell DTX.

[0150] For example, a non-active period can also be referred to as an inactive period.

[0151] In some examples, the value of one or more transmission parameters on which one or more first SPS downlink channels are based and the value of one or more transmission parameters on which one or more second SPS downlink channels are based may be different. For example, one or more transmission parameters may include the number of transmissions, the transmission period, the interval between transmissions, and / or the validity of the transmission opportunity.

[0152] In some examples, transmission of one or more second SPS downlink channels may be triggered or directed based on downlink control information (DCI) and / or media access control (MAC) control elements (CE) from a network. For example, transmission parameters for transmission of one or more second SPS downlink channels (or information used to derive transmission parameters) may be provided to a terminal via the DCI and / or MAC CE, and based thereon, the terminal may receive one or more second SPS downlink channels.

[0153] In some examples, one or more first SPS downlink channels and one or more second SPS downlink channels may be associated with a first SPS setting. For example, one or more first SPS downlink channels and one or more second SPS downlink channels may be associated with the same single SPS setting.

[0154] In this case, the value of one or more transmission parameters on which one or more first SPS downlink channels are based may be provided through the first SPS setting. For one or more (or some or all of) of the one or more transmission parameters on which one or more second SPS downlink channels are based, a value adjusted (or changed) based on the value provided through the first SPS setting may be applied. For example, a value X of the transmission period for the first SPS downlink channel may be provided through the first SPS setting, and a transmission period X' (e.g., a value greater than X) may be applied for the second SPS downlink channel. As such, since the first SPS downlink channel and the second SPS downlink channel are based on the same single SPS setting, the same value may be applied to the remaining setting parameters, excluding specific transmission parameters.

[0155] In some examples, one or more first SPS downlink channels may be associated with a first SPS setting, and one or more second SPS downlink channels may be associated with a second SPS setting. For example, one or more first SPS downlink channels and one or more second SPS downlink channels may be associated with distinct SPS settings.

[0156] In some examples, downlink data related to one or more of a specific logical channel or specific service may be received through one or more second SPS downlink channels. For example, downlink data for a logical channel or service associated with delay-sensitive traffic may be transmitted / received even during the cell DTX non-active period as an exceptional operation in the general case where SPS transmission is not performed during the cell DTX non-active period.

[0157] In some examples, settings related to cell DTX may be provided to the terminal from the network. For example, if settings related to cell DTX are provided separately from SPS settings, and active and non-active sections are specified in the settings related to cell DTX, then one or more second SPS downlink channel transmissions / receptions according to the present disclosure in the non-active section may be performed according to the SPS settings (or based on modified / changed values ​​of transmission parameters provided by the SPS settings).

[0158] In some examples, the first downlink and / or second downlink channel may include PDSCH and may also include a downlink data channel of a different name.

[0159] The method described in the example of FIG. 9 can be performed by the first wireless device (100) of FIG. 11, which will be described later. For example, one or more processors (102) of the first wireless device (100) may be configured to receive one or more first SPS downlink channels from a network through one or more transceivers (106) during the active period of the cell DTX, and to receive one or more second SPS downlink channels from a network through one or more transceivers (106) during the non-active period of the cell DTX. Furthermore, one or more memories (104) of the first wireless device (100) may store instructions for performing the method described in the example of FIG. 9 or the examples described later, when executed by one or more processors (102).

[0160] FIG. 10 is a drawing illustrating an example of a method performed by a base station according to the present disclosure.

[0161] In step S1010, the base station may transmit one or more first SPS downlink channels to the terminal during the active period of the cell DTX.

[0162] In step S1020, the base station may transmit one or more second SPS downlink channels to the terminal during the non-active period of the cell DTX.

[0163] In the example of FIG. 10, the specific features of the first SPS downlink channel, the second SPS downlink channel, the transmission parameter(s) on which the first SPS downlink channel is based, the transmission parameter(s) on which the second SPS downlink channel is based, and the SPS setting(s) associated with the first SPS downlink channel and / or the second SPS downlink channel are identical to the description with reference to the example of FIG. 9, so redundant descriptions are omitted.

[0164] The method described in the example of FIG. 10 can be performed by the second wireless device (200) of FIG. 11, which will be described later. For example, one or more processors (202) of the second wireless device (200) may be configured to transmit one or more first SPS downlink channels to a terminal through one or more transceivers (206) during the active period of the cell DTX, and to transmit one or more second SPS downlink channels to a terminal through one or more transceivers (206) during the non-active period of the cell DTX. Furthermore, one or more memories (204) of the second wireless device (200) may store instructions for performing the method described in the example of FIG. 10 or the examples described later when executed by one or more processors (202).

[0165] Hereinafter, various examples of the present disclosure regarding SPS transmission / reception in the active and non-active periods of cell DTX / DRX will be described.

[0166] This disclosure describes an adaptation method for SPS transmission and reception in SPS resources according to the active / non-active intervals of Cell DTX / DRX. For example, examples of advancing or delaying SPS PDSCH transmission occasions (TOs) for SPS setting(s) according to Cell DTX / DRX in the time domain are described below. Additionally, or alternatively, examples of providing adaptation information regarding SPS transmission parameters (e.g., SPS interval length, number of SPS TOs within the SPS interval, etc.) for SPS setting(s) according to Cell DTX / DRX to a terminal via separate signaling (e.g., RRC, MAC CE, and / or DCI) or by embedding it on the SPS PDSCH and providing it to the terminal are described below.

[0167] For example, methods may include a base station allocating SPS radio resources to a terminal, receiving or transmitting data over SPS resources, responding via an uplink control channel (e.g., PUCCH) with HARQ-ACK information regarding the result of receiving SPS downlink data (e.g., whether decoding of a transmission block (TB) received via SPS PDSCH was successful), and / or receiving retransmission scheduling information from the base station via a downlink control channel (e.g., PDCCH). Additionally, methods may include a terminal transmitting a signal / channel to the base station to indicate its capabilities and / or service requirements, and the base station receiving such signals / channels. Furthermore, methods may include a base station providing settings related to Cell DTX / DRX to the terminal, allowing the terminal to perform SPS-related operations based on the active and non-active periods of Cell DTX / DRX.

[0168] Example 1

[0169] The present embodiment relates to a method for a base station and a terminal to perform SPS PDSCH transmission and reception by changing the location of an SPS PDSCH transmission opportunity (hereinafter, SPS opportunity) of an SPS setting(s) according to a cell DTX.

[0170] For example, if an SPS opportunity based on the SPS setting overlaps with the non-active period of the cell DTX, the terminal can perform SPS reception by assuming / determining that the location of the said SPS opportunity has changed / adjusted.

[0171] Example 1-1

[0172] The location of SPS opportunities may be changed / adjusted according to predefined / specified rules or RRC settings.

[0173] For example, if there are multiple overlapping SPS opportunities in the non-active period of Cell DTX, one of those SPS opportunities (e.g., the last or first SPS opportunity in chronological order) may be moved to a position in a later time unit (e.g., slot) by an offset from the last time unit (e.g., slot) of the non-active period of Cell DTX. Alternatively, if there are multiple overlapping SPS opportunities in the non-active period of Cell DTX, one of those SPS opportunities (e.g., the last or first SPS opportunity in chronological order) may be moved to a position in an earlier time unit (e.g., slot) by an offset from the first time unit (e.g., slot) of the non-active period of Cell DTX.

[0174] The aforementioned offset value may be provided / set in advance from the base station to the terminal, or it may be predefined without separate signaling between the base station and the terminal.

[0175] Additionally or alternatively, the remaining SPS opportunity(s) may also be moved by the same time interval as the time interval during which the aforementioned one (e.g., first or last) SPS opportunity was moved. Alternatively, the remaining SPS opportunity(s) may not be moved from their original positions (e.g., positions overlapping with the non-active period of the cell DTX), and only the aforementioned one (e.g., first or last) SPS opportunity may be moved. The position of the SPS opportunity prior to the move is not used, and SPS transmission and reception may be performed at the SPS opportunity at the moved position.

[0176] Examples 1-2

[0177] The location of SPS opportunities can be changed / adjusted based on information provided by the base station (e.g., DCI).

[0178] In the active section of a cell DTX located before or after the non-active section of a cell DTX, the terminal can receive a DCI containing information about an offset value.

[0179] For example, if there are multiple overlapping SPS opportunities in the non-active period of Cell DTX, one of those SPS opportunities (e.g., the last or first SPS opportunity in chronological order) may be moved from the last time unit (e.g., slot) of the non-active period of Cell DTX to a later time unit (e.g., slot) by an offset indicated via DCI. Alternatively, if there are multiple overlapping SPS opportunities in the non-active period of Cell DTX, one of those SPS opportunities (e.g., the last or first SPS opportunity in chronological order) may be moved from the first time unit (e.g., slot) of the non-active period of Cell DTX to an earlier time unit (e.g., slot) by an offset indicated via DCI.

[0180] Additionally or alternatively, the remaining SPS opportunity(s) may also be moved by the same time interval as the time interval during which the aforementioned one (e.g., first or last) SPS opportunity was moved. Alternatively, the remaining SPS opportunity(s) may not be moved from their original positions (e.g., positions overlapping with the non-active period of the cell DTX), and only the aforementioned one (e.g., first or last) SPS opportunity may be moved. The position of the SPS opportunity prior to the move is not used, and SPS transmission and reception may be performed at the SPS opportunity at the moved position.

[0181] Examples 1-3

[0182] A change of location from the Nth SPS opportunity to the Mth SPS opportunity may be set / instructed to the terminal.

[0183] In the active period of a cell DTX located prior to the non-active period of a cell DTX, the terminal can receive an SPS PDSCH on the Nth SPS opportunity. A DCI or MAC CE embedded within the received SPS PDSCH may contain information regarding an offset value.

[0184] For example, if there are multiple overlapping SPS opportunities in the non-active period of a cell DTX, one of those SPS opportunities (e.g., the last or first SPS opportunity in chronological order) may be moved from the last time unit (e.g., slot) of the non-active period of the cell DTX to a later time unit (e.g., slot) by an offset indicated by the information embedded in the SPS PDSCH. Alternatively, if there are multiple overlapping SPS opportunities in the non-active period of a cell DTX, one of those SPS opportunities (e.g., the last or first SPS opportunity in chronological order) may be moved from the first time unit (e.g., slot) of the non-active period of the cell DTX to an earlier time unit (e.g., slot) by an offset indicated by the information embedded in the SPS PDSCH.

[0185] Additionally or alternatively, the remaining SPS opportunity(s) may also be moved by the same time interval as the time interval during which the aforementioned one (e.g., first or last) SPS opportunity was moved. Alternatively, the remaining SPS opportunity(s) may not be moved from their original positions (e.g., positions overlapping with the non-active period of the cell DTX), and only the aforementioned one (e.g., first or last) SPS opportunity may be moved. The position of the SPS opportunity prior to the move is not used, and SPS transmission and reception may be performed at the SPS opportunity at the moved position.

[0186] Example 2

[0187] This embodiment relates to a method for changing / adjusting the number of SPS opportunities based on Cell DTX. For example, the number of SPS opportunities in Cell DTX2 (e.g., the non-active period of Cell DTX) may be mitigated (or reduced) compared to the number of SPS opportunities in Cell DTX1 (e.g., the active period of Cell DTX).

[0188] The terminal can adjust the cycle of SPS PDSCH opportunities (hereinafter referred to as SPS opportunities) for SPS setting(s) according to the cell DTX, or skip SPS opportunities at regular intervals.

[0189] Example 2-1

[0190] The base station may allocate an SPS opportunity every 10ms during the active period of the cell DTX and every 40ms during the non-active period of the cell DTX, and set / instruct the terminal accordingly. Accordingly, the terminal determines the allocated SPS opportunity according to the base station's setting / instruction (e.g., instruction via DCI, instruction via MAC CE, or setting via RRC signaling), attempts to receive SPS PDSCH at the SPS opportunity every 10ms during the active period of the cell DTX, and attempts to receive SPS PDSCH at the SPS opportunity every 40ms during the non-active period of the cell DTX.

[0191] Example 2-2

[0192] A base station allocates SPS opportunities at a predetermined interval without distinguishing between the active or non-active periods of the cell DTX, but a terminal may skip some SPS opportunity(s) or determine them to be invalid during the non-active period. For example, it is assumed that the base station allocates SPS opportunities at 10ms intervals. During the active period of the cell DTX, the terminal attempts to receive SPS PDSCH on all allocated SPS opportunities every 10ms, but during the non-active period of the cell DTX, it may determine an SPS opportunity every 40ms to be valid and determine the remaining SPS opportunities between the valid SPS opportunities to be invalid. Accordingly, the terminal attempts to receive SPS PDSCH on the SPS opportunity every 40ms and may not attempt to receive SPS PDSCH on the remaining SPS opportunities among those set by the base station.

[0193] The operation of the terminal assuming and applying the validity / invalidity of an SPS opportunity can be performed according to the base station's settings / instructions (e.g., instructions via DCI, instructions via MAC CE, or settings via RRC signaling).

[0194] Example 3

[0195] This embodiment relates to a method for changing / adjusting the number of SPS opportunities based on UE DRX. For example, the number of SPS opportunities associated with a long DRX cycle may be mitigated (or reduced) compared to the number of SPS opportunities associated with a short DRX cycle.

[0196] The terminal can adjust the cycle of SPS PDSCH opportunities (hereinafter referred to as SPS opportunities) for SPS setting(s) according to the UE DRX, or skip SPS opportunities at regular intervals.

[0197] Example 3-1

[0198] The base station may allocate an SPS opportunity every 10ms when the on-duration of the UE DRX is set according to a short DRX cycle, and an SPS opportunity every 40ms when the on-duration of the UE DRX is set according to a long DRX cycle.

[0199] The setting for the period or number of SPS opportunities based on the length of such DRX cycles can be provided to the terminal through a single signaling. For example, a base station can provide information to the terminal regarding the period / number of SPS opportunities based on the DRX cycle length through a single signaling (e.g., instruction via DCI, instruction via MAC CE, or setting via RRC signaling).

[0200] A terminal that receives such signaling may attempt to receive SPS PDSCH at an SPS opportunity every 10ms when the on-duration of the UE DRX is set according to a short DRX cycle, and may attempt to receive SPS PDSCH at an SPS opportunity every 40ms when the on-duration of the UE DRX is set according to a long DRX cycle.

[0201] Example 3-2

[0202] A base station allocates SPS opportunities at a predetermined interval without distinguishing the length of the UE DRX cycle, but if the terminal sets the on-duration of the UE DRX according to a long DRX cycle, it may skip some SPS opportunity(s) or determine them to be invalid. For example, it is assumed that the base station allocates SPS opportunities at 10ms intervals. If the on-duration of the UE DRX is set according to a short DRX cycle, the terminal attempts to receive SPS PDSCH on all SPS opportunities allocated every 10ms; however, if the on-duration of the UE DRX is set according to a long DRX cycle, it may determine that an SPS opportunity every 40ms is valid and determine that the remaining SPS opportunities between the valid SPS opportunities are invalid. Accordingly, the terminal attempts to receive SPS PDSCH on the SPS opportunity every 40ms and may not attempt to receive SPS PDSCH on the remaining SPS opportunities among those set by the base station.

[0203] The operation of the terminal assuming and applying the validity / invalidity of an SPS opportunity can be performed according to the base station's settings / instructions (e.g., instructions via DCI, instructions via MAC CE, or settings via RRC signaling).

[0204] Example 4

[0205] Among the SPS opportunities according to a specific SPS setting, if SPS PDSCH transmission is not detected in N SPS opportunities, or if HARQ-ACK information for the SPS PDSCH received in N SPS opportunities is determined to be NACK (or decoding failure), the number of SPS transmissions (or SPS transmission cycle) of the corresponding SPS setting may be adjusted / changed. For example, N SPS opportunities may be counted continuously (e.g., count reset if not continuous), or counted cumulatively even if not continuous for a certain period (count reset when the period expires). Alternatively, the count of NACK or ACK may be applied based on the SPS opportunity, or counted based on the determination / reporting of NACK or ACK, taking into account cases where NACK or ACK is not determined / reported per SPS opportunity.

[0206] Example 4-1

[0207] If SPS PDSCH transmission is not detected (or not received) in N SPS opportunities among the configured SPS opportunities, the terminal does not attempt to receive SPS PDSCH in all SPS opportunities of the corresponding SPS configuration, but may attempt to receive SPS PDSCH only in some SPS opportunity(s).

[0208] If a terminal attempting to receive only in a portion of the SPS opportunities detects (or receives) an SPS PDSCH transmission in M ​​SPS opportunities, it may attempt to receive the SPS PDSCH in all SPS opportunities of the corresponding SPS setting. For example, the M SPS opportunities may be counted continuously (e.g., if not continuous, the count is reset), or they may be counted cumulatively even if not continuous for a certain period (the count is reset when the period expires).

[0209] For example, it can be assumed that the short interval / period containing all SPS opportunities is 10ms, and the long interval / period containing only some SPS PDSCH opportunities is 40ms. In this case, the base station may transmit SPS PDSCH every 10ms during the active period of the cell DTX and SPS PDSCH every 40ms during the non-active period of the cell DTX. Depending on the active period or non-active period of the cell DTX set / instructed by the base station (e.g., provided via DCI / MAC CE / RRC messages), the terminal may attempt to receive SPS PDSCH at the short interval / period or SPS PDSCH at the long interval / period.

[0210] Even if the terminal does not receive a setting / instruction regarding the active / non-active period of the cell DTX from the base station, it may operate as follows to adjust the SPS PDSCH reception attempt interval / period according to the active / non-active period of the cell DTX.

[0211] For example, a terminal that first applies a specific SPS setting may attempt to receive SPS PDSCH every 10ms, thereby attempting to receive SPS PDSCH at all SPS opportunities according to the said SPS setting. If the terminal fails to detect SPS PDSCH transmission at N SPS opportunities during a predetermined time interval, or fails to detect SPS PDSCH transmission at N consecutive SPS opportunities, it may attempt to receive SPS PDSCH only at SPS opportunities every 40ms, rather than attempting to receive SPS PDSCH at all SPS opportunities according to the said SPS setting. Accordingly, the terminal may attempt to receive SPS PDSCH at only some of the total SPS opportunities.

[0212] In this way, if a terminal attempting to receive SPS PDSCH at intervals / cycles of 40ms detects SPS PDSCH transmission in M ​​SPS opportunities during a predetermined time interval, or detects SPS PDSCH transmission in M ​​consecutive SPS opportunities, it may subsequently attempt to receive SPS PDSCH every 10ms, thereby attempting to receive SPS PDSCH in all SPS opportunities according to the corresponding SPS setting.

[0213] Example 4-2

[0214] If a terminal attempting to receive SPS PDSCH in all SPS opportunities according to a specific SPS setting (e.g., at short intervals / periods) does not detect SPS PDSCH transmission for a predetermined time interval or for N consecutive SPS opportunities, a predetermined timer may be started / restarted. When the said timer expires, the terminal may attempt to receive SPS PDSCH in SPS opportunities at long intervals / periods.

[0215] If a terminal attempting to receive SPS PDSCH during some SPS opportunities (e.g., at long intervals / periods) detects SPS PDSCH transmission during M consecutive SPS opportunities for a predetermined time interval, a predetermined timer may be started / restarted. While the said timer is running, the terminal may attempt to receive SPS PDSCH during SPS opportunities at short intervals / periods.

[0216] Example 4-3

[0217] If a NACK (or decoding failure) is determined or reported for an SPS PDSCH received in N SPS opportunities among the configured SPS opportunities, the terminal does not attempt to receive the SPS PDSCH in all SPS opportunities of the corresponding SPS configuration, but may attempt to receive the SPS PDSCH in only some SPS opportunity(s).

[0218] If an ACK (or decoding success) is determined or reported for an SPS PDSCH received in M ​​SPS opportunities, a terminal attempting to receive SPS PDSCH in all SPS opportunities of the corresponding SPS configuration may attempt to receive SPS PDSCH in all SPS opportunities. For example, M SPS opportunities may be counted continuously (e.g., count reset if not continuous), or may be counted cumulatively even if not continuous for a specified interval (count reset when the interval expires).

[0219] For example, it can be assumed that, depending on a specific SPS setting, the short interval / period containing all SPS opportunities is 10ms, and the long interval / period containing only some SPS PDSCH opportunities is 40ms. If a base station receives a NACK from a terminal for an SPS PDSCH transmitted during a predetermined time interval or in N consecutive SPS opportunities, the base station may transmit an SPS PDSCH only during SPS opportunities every 40ms. If a base station transmitting an SPS PDSCH at 40ms intervals / periods receives an ACK from a terminal for an SPS PDSCH transmitted during a predetermined time interval or in M ​​consecutive SPS opportunities, it may thereafter transmit an SPS PDSCH during an SPS opportunity every 10ms.

[0220] A terminal that first applies a specific SPS setting may attempt to receive an SPS PDSCH every 10ms and may attempt to receive an SPS PDSCH in all SPS opportunities according to the said SPS setting. If the terminal determines or reports a NACK for an SPS PDSCH received during a predetermined time interval or in N consecutive SPS opportunities, it may attempt to receive an SPS PDSCH only during an SPS opportunity every 40ms. If a terminal attempting to receive an SPS PDSCH at 40ms intervals / cycle determines or reports an ACK for an SPS PDSCH received during a predetermined time interval or in M ​​consecutive SPS opportunities, it may thereafter attempt to receive an SPS PDSCH every 10ms.

[0221] Examples 4-4

[0222] When a terminal attempting to receive an SPS PDSCH in all SPS opportunities according to a specific SPS setting (e.g., at short intervals / periods) determines or reports a NACK for an SPS PDSCH received during a predetermined time interval or N consecutive SPS opportunities, a predetermined timer may be started / restarted. When the said timer expires, the terminal may attempt to receive an SPS PDSCH in SPS opportunities at long intervals / periods.

[0223] When a terminal attempting to receive an SPS PDSCH in some SPS opportunities (e.g., at long intervals / periods) determines or reports an ACK for an SPS PDSCH received in M ​​consecutive SPS opportunities during a predetermined time interval, a predetermined timer may be started / restarted. While the timer is running, the terminal may attempt to receive an SPS PDSCH in SPS opportunities at short intervals / periods.

[0224] Example 5

[0225] The SPS setting index pool can be distinguished in the active and non-active sections of Cell DTX / DRX or UE DRX.

[0226] For example, assume a case where three SPS settings corresponding to SPS setting indices #1, #2, and #3 are enabled. Also, assume a case where three SPS settings corresponding to SPS setting indices #4, #5, and #6 are disabled. In this case, if information indicating a specific SPS setting index in the active and non-active sections of the Cell DTX / DRX or UE DRX is provided to the terminal (e.g., via DCI), the terminal may operate as in the following examples.

[0227] Example 5-1

[0228] If the DCI received by the terminal in the active interval (e.g., DCI format scrambled by CRC by CS-RNTI) indicates the activation of an SPS setting index #x (x=1, 2, 3, 4, 5, or 6), the terminal can activate the SPS setting corresponding to index #x accordingly.

[0229] If the DCI received by the terminal in the non-active period (e.g., DCI format CRC scrambling by CS-RNTI) indicates the activation of SPS setting index #x, the terminal can accordingly activate the SPS setting corresponding to index #x.

[0230] If the DCI received by the terminal in the active interval (e.g., DCI format CRC scrambling by CS-RNTI) indicates the deactivation of SPS setting index #x, the terminal may deactivate the SPS setting corresponding to index #x accordingly.

[0231] If the DCI received by the terminal in the non-active period (e.g., DCI format CRC-scrambed by CS-RNTI) indicates the deactivation of SPS setting index #x, the terminal may deactivate the SPS setting corresponding to index #x accordingly.

[0232] Example 5-2

[0233] If the DCI received by the terminal (e.g., DCI format CRC scrambling by CS-RNTI) indicates an SPS setting index #x (x=1, 2, 3, 4, 5, or 6), and the DCI is received in an active period, the SPS setting index corresponding to index #x can be disabled. Alternatively, if the DCI is received in a non-active period, the SPS setting index corresponding to index #x can be enabled.

[0234] Example 5-3

[0235] A DCI received by the terminal (e.g., a DCI format scrambled by CRC by CS-RNTI) indicates the activation of a first value and an SPS setting as an SPS setting index, and if the DCI is received in an active section, the SPS setting corresponding to index #1 is activated, and if the DCI is received in a non-active section, the SPS setting corresponding to index #4 is activated.

[0236] A DCI received by the terminal (e.g., a DCI format scrambled by CRC by CS-RNTI) indicates the activation of a second value and an SPS setting as an SPS setting index, and if the DCI is received in an active section, the SPS setting corresponding to index #2 is activated, and if the DCI is received in a non-active section, the SPS setting corresponding to index #5 is activated.

[0237] A DCI received by the terminal (e.g., a DCI format scrambled by CRC by CS-RNTI) indicates the activation of a third value and an SPS setting as an SPS setting index, and if the DCI is received in an active section, the SPS setting corresponding to index #3 is activated, and if the DCI is received in a non-active section, the SPS setting corresponding to index #6 is activated.

[0238] A DCI received by the terminal (e.g., a DCI format CRC scrambled by CS-RNTI) indicates the first value and the deactivation of the SPS setting index as an SPS setting index, and if the DCI is received in an active period, the SPS setting corresponding to index #1 is deactivated, and if the DCI is received in a non-active period, the SPS setting corresponding to index #4 is deactivated.

[0239] A DCI received by the terminal (e.g., a DCI format CRC scrambled by CS-RNTI) indicates the deactivation of a second value and an SPS setting index, and if the DCI is received in an active period, the SPS setting corresponding to index #2 is deactivated, and if the DCI is received in a non-active period, the SPS setting corresponding to index #5 is deactivated.

[0240] A DCI received by the terminal (e.g., a DCI format CRC scrambled by CS-RNTI) indicates the deactivation of a third value and an SPS setting as an SPS setting index, and if the DCI is received in an active period, the SPS setting corresponding to index #3 is deactivated, and if the DCI is received in a non-active period, the SPS setting corresponding to index #6 is deactivated.

[0241] Example 6

[0242] Information for changing / adjusting / adapting the length of the SPS interval and / or the number of SPS opportunities within the SPS interval may be embedded within the corresponding SPS PDSCH or provided to the terminal through separate signaling (e.g., DCI, MAC CE, or RRC signaling).

[0243] Example 6-1

[0244] If N SPS opportunities overlap with the non-active period of the cell DTX, the terminal can attempt to receive SPS PDSCH by changing / adjusting the number of (valid) SPS opportunities within the non-active period of the cell DTX to M.

[0245] Accordingly, the intervals between (valid) SPS opportunities may be changed / adjusted. For example, if N > M, the interval between SPS opportunities within the non-active period of the cell DTX may correspond to an increase of an offset compared to the interval between SPS opportunities within the active period of the cell DTX. Depending on the number of SPS opportunities and / or the intervals between SPS opportunities changed / adjusted in this way, SPS PDSCH reception may be attempted at the SPS opportunities at the changed / adjusted locations.

[0246] Example 6-1-1

[0247] Depending on predefined / specified rules or RRC settings provided by the base station, changes / adjustments to the number of SPS opportunities within the non-active interval, or corresponding changes / adjustments to the intervals between SPS opportunities may be applied.

[0248] Example 6-1-2

[0249] Depending on the DCI or MAC CE instructions provided by the base station, changes / adjustments to the number of SPS opportunities within the non-active period, or corresponding changes / adjustments to the intervals between SPS opportunities, may be applied.

[0250] For example, a DCI containing information about such changes / adjustments as above can be CRC scrambled by a C-RNTI, CS-RNTI, or a specific RNTI.

[0251] Example 6-1-3

[0252] Information regarding the change / adjustment of the position of the Qth SPS opportunity can be provided through the SPS PDSCH transmitted at the Pth SPS opportunity.

[0253] For example, information (e.g., DCI or MAC CE) embedded in the SPS PDSCH of the Pth SPS opportunity received in the active interval of the cell DTX may indicate a change / adjustment of the number of Qth (and subsequent) SPS opportunities in the non-active interval, or a change / adjustment of the corresponding interval between SPS opportunities.

[0254] Example 6-2

[0255] Groups of SPS settings can be defined / configured, and changes / adjustments, such as advancing or rescheduling the positions of SPS opportunities, can be applied to each SPS setting group. SPS setting groups may be grouped based on SPS setting index values ​​or based on the HPN (HARQ process number) values ​​corresponding to the SPS settings. A single SPS setting group may include one or multiple SPS settings.

[0256] For example, through the RRC message provided by the base station to the terminal, the terminal can verify that SPS setting index #1 and SPS setting index #2 belong to the same setting group (e.g., group index = k) or are mapped to the same HPN value (e.g., HPN value = k).

[0257] For example, if a terminal receives a DCI (or MAC CE) indicating k, and the DCI (or MAC CE) indicates +m slots, it can be assumed that all SPS opportunities allocated after the offset from the slot where the DCI (or MAC CE) was received have been repositioned / adjusted / moved by m slots. In this case, the offset is 0 or a positive integer. For example, the SPS opportunity of the n-th slot is repositioned / adjusted to the SPS opportunity of the n+m-th slot, and the terminal can attempt to receive SPS PDSCH from the repositioned / adjusted SPS opportunity.

[0258] For example, if a terminal receives a DCI (or MAC CE) indicating k, and the DCI (or MAC CE) indicates -m slots, it can be assumed that all SPS opportunities allocated after the offset from the slot where the DCI (or MAC CE) was received have been repositioned / adjusted / moved forward by m slots. In this case, the offset is 0 or a positive integer. For example, the SPS opportunity of the n-th slot is changed / adjusted to the SPS opportunity of the nm-th slot, and the terminal can attempt to receive SPS PDSCH from the changed / adjusted SPS opportunity.

[0259] For example, a DCI containing information about such changes / adjustments as above can be CRC scrambled by a C-RNTI, CS-RNTI, or a specific RNTI.

[0260] In conventional SPS configuration methods, changing the location of an SPS resource / opportunity requires a procedure of deactivating the SPS configuration(s) via RRC or DCI and then activating other SPS configuration(s) associated with the location of another resource / opportunity. In contrast, according to the examples of the present disclosure, the location of an SPS resource / opportunity can be changed / adjusted through a single DCI transmission while maintaining the activated SPS configuration(s).

[0261] As an additional example, the terminal may operate by assuming that the change / adjustment to the position of the SPS opportunity is applied only when it receives a DCI (or MAC CE) for changing / adjusting the position of the SPS opportunity and transmits an ACK for the DCI (or MAC CE). If a NACK for the said DCI (or MAC CE) is transmitted, it may be assumed that the change / adjustment to the position of the SPS opportunity is not applied. Furthermore, if an ACK for the said DCI (or MAC CE) is transmitted, the terminal may assume that all positions of the SPS opportunity allocated after the offset from the slot in which the ACK was transmitted have been changed / adjusted.

[0262] Example 7

[0263] The present disclosure relates to a method for receiving an SPS PDSCH during an SPS opportunity in response to a wake-up signal (WUS). For example, the WUS may correspond to an LP-WUS transmitted and received through a low-power (LP) transceiver. When the LP-WUS instructs the main transceiver to sleep, the terminal may operate in a full sleep mode even during an on-duration period such as a UE DRX. When the LP-WUS instructs the main transceiver to wake up, the terminal may wake the main transceiver and perform normal transmit and receive operations (including UE DRX).

[0264] A terminal operating in sleep mode by receiving LP-WUS from a base station may disable a specific SPS setting during the period in which the sleep mode is applied, or assume that the activated SPS opportunity(s) of a specific SPS setting are suspended, skipped, or invalid.

[0265] Information indicating a specific SPS setting to be disabled may be provided to the terminal via RRC signaling, DCI, or MAC CE, or may be provided to the terminal via LP-WUS. If information regarding a specific SPS setting is not provided to the terminal, the method of the present disclosure may be applied to all SPS settings that are enabled or configured for the terminal.

[0266] A terminal that wakes up by receiving an LP-WUS from a base station or by other means may re-enable SPS setting(s) that were previously disabled or instructed to be disabled, or resume or re-enable suspended / skipped / invalidated SPS opportunities, even without receiving separate signaling from the base station. For example, the terminal may re-enable all active SPS opportunities that occur after receiving an LP-WUS instructing to wake up, and attempt to receive SPS PDSCH at those SPS opportunities.

[0267] Alternatively, specific SPS setting(s) may be indicated via the DCI (or MAC CE) received after the terminal wakes up. The terminal may activate the indicated SPS setting(s) or resume / enable suspended / skipped / invalidated SPS opportunities. For example, the terminal may enable all active SPS opportunities associated with the specific SPS setting that occur after receiving the LP-WUS instructing the wake-up, and attempt to receive SPS PDSCH at those SPS opportunities.

[0268] In the examples described above, a new operation can be provided that supports SPS PDSCH transmission / reception to the terminal in the non-active period (although fewer opportunities compared to the active period) by changing / adjusting the location / number / interval of SPS opportunities in the active (or wake-up, on-duration) period and the non-active (or sleep) period in various situations such as cell DTX, UE DRX, and LP-WUS-based operation.

[0269] General devices to which the present disclosure may be applied

[0270] FIG. 11 is a drawing illustrating a block diagram of a wireless communication device according to one embodiment of the present disclosure.

[0271] Referring to FIG. 11, the first wireless device (100) and the second wireless device (200) can transmit and receive wireless signals through various wireless access technologies (e.g., LTE, NR).

[0272] The first wireless device (100) includes one or more processors (102) and one or more memories (104), and may additionally include one or more transceivers (106) and / or one or more antennas (108). The processor (102) controls the memory (104) and / or transceivers (106) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation included in the present disclosure. For example, the processor (102) may process information within the memory (104) to generate a first information / signal and then transmit a wireless signal containing the first information / signal through the transceiver (106). Additionally, the processor (102) may receive a wireless signal containing a second information / signal through the transceiver (106) and then store information obtained from the signal processing of the second information / signal in the memory (104). The memory (104) may be connected to the processor (102) and may store various information related to the operation of the processor (102). For example, the memory (104) may store software code containing instructions for performing some or all of the processes controlled by the processor (102) or for performing the descriptions, functions, procedures, proposals, methods, and / or sequence diagrams of operation included in the present disclosure. Here, the processor (102) and the memory (104) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). The transceiver (106) may be connected to the processor (102) and may transmit and / or receive wireless signals through one or more antennas (108). The transceiver (106) may include a transmitter and / or receiver. The transceiver (106) may be combined with an RF (Radio Frequency) unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0273] The second wireless device (200) includes one or more processors (202) and one or more memories (204), and may additionally include one or more transceivers (206) and / or one or more antennas (208). The processor (202) controls the memory (204) and / or transceivers (206) and may be configured to implement the descriptions, functions, procedures, proposals, methods and / or sequences of operation included in the present disclosure. For example, the processor (202) may process information within the memory (204) to generate a third information / signal and then transmit a wireless signal containing the third information / signal through the transceiver (206). Additionally, the processor (202) may receive a wireless signal containing a fourth information / signal through the transceiver (206) and then store information obtained from the signal processing of the fourth information / signal in the memory (204). Memory (204) may be connected to the processor (202) and may store various information related to the operation of the processor (202). For example, memory (204) may store software code containing instructions for performing some or all of the processes controlled by the processor (202) or for performing the descriptions, functions, procedures, proposals, methods, and / or sequences of operation included in the present disclosure. Here, the processor (202) and memory (204) may be part of a communication modem / circuit / chip designed to implement wireless communication technology (e.g., LTE, NR). A transceiver (206) may be connected to the processor (202) and may transmit and / or receive wireless signals through one or more antennas (208). The transceiver (206) may include a transmitter and / or receiver. The transceiver (206) may be interchangeable with an RF unit. In the present disclosure, a wireless device may refer to a communication modem / circuit / chip.

[0274] Hereinafter, hardware elements of the wireless device (100, 200) will be described in more detail. Although not limited thereto, one or more protocol layers may be implemented by one or more processors (102, 202). For example, one or more processors (102, 202) may implement one or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP, RRC, SDAP). One or more processors (102, 202) may generate one or more Protocol Data Units (PDUs) and / or Service Data Units (SDUs) according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation included 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 flowcharts of operation included in the present disclosure. One or more processors (102, 202) may generate a signal (e.g., a baseband signal) including a PDU, SDU, message, control information, data, or information according to the functions, procedures, proposals, and / or methods disclosed in the present disclosure and provide it to one or more transceivers (106, 206). One or more processors (102, 202) may receive a signal (e.g., a baseband signal) from one or more transceivers (106, 206) and may obtain a PDU, SDU, message, control information, data, or information according to the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation included in the present disclosure.

[0275] One or more processors (102, 202) may be referred to as a controller, microcontroller, microprocessor, or microcomputer. One or more processors (102, 202) may be implemented by hardware, firmware, software, or a combination thereof. For example, one or more Application Specific Integrated Circuits (ASICs), one or more Digital Signal Processors (DSPs), one or more Digital Signal Processing Devices (DSPDs), one or more Programmable Logic Devices (PLDs), or one or more Field Programmable Gate Arrays (FPGAs) may be included in one or more processors (102, 202). Descriptions, functions, procedures, proposals, methods, and / or flowcharts of operations included in this disclosure may be implemented using firmware or software, and the firmware or software may be implemented to include modules, procedures, functions, etc. Firmware or software configured to perform the descriptions, functions, procedures, proposals, methods, and / or operation sequences included in the present disclosure may be included in one or more processors (102, 202) or stored in one or more memories (104, 204) and driven by one or more processors (102, 202). The descriptions, functions, procedures, proposals, methods, and / or operation sequences included in the present disclosure may be implemented using firmware or software in the form of code, instructions, and / or sets of instructions.

[0276] One or more memories (104, 204) may be connected to one or more processors (102, 202) and may store various forms of data, signals, messages, information, programs, code, instructions, and / or commands. One or more memories (104, 204) may be composed of ROM, RAM, EPROM, flash memory, hard drive, registers, cache memory, computer read storage media, and / or combinations thereof. One or more memories (104, 204) may be located inside and / or outside of one or more processors (102, 202). Additionally, one or more memories (104, 204) may be connected to one or more processors (102, 202) through various technologies such as wired or wireless connections.

[0277] One or more transceivers (106, 206) may transmit user data, control information, wireless signals / channels, etc., as mentioned in the methods and / or operation flowcharts, etc., of the present disclosure to one or more other devices. One or more transceivers (106, 206) may receive user data, control information, wireless signals / channels, etc., as mentioned in the descriptions, functions, procedures, proposals, methods and / or operation flowcharts, etc., included in the present disclosure from one or more other devices. For example, one or more transceivers (106, 206) may be connected to one or more processors (102, 202) and may transmit and receive wireless signals. For example, one or more processors (102, 202) may control one or more transceivers (106, 206) to transmit user data, control information, or wireless signals to one or more other devices. Additionally, one or more processors (102, 202) may control one or more transceivers (106, 206) to receive user data, control information, or wireless signals from one or more other devices. Additionally, one or more transceivers (106, 206) may be connected to one or more antennas (108, 208), and one or more transceivers (106, 206) may be configured to transmit and receive user data, control information, wireless signals / channels, etc., as described in the descriptions, functions, procedures, proposals, methods, and / or flowcharts of operation included in the present disclosure through one or more antennas (108, 208). In the present disclosure, one or more antennas may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports). One or more transceivers (106, 206) can convert the received wireless signal / channel, etc. from an RF band signal to a baseband signal in order to process the received user data, control information, wireless signal / channel, etc. using one or more processors (102, 202).One or more transceivers (106, 206) can convert user data, control information, wireless signals / channels, etc. processed using one or more processors (102, 202) from baseband signals to RF band signals. To this end, one or more transceivers (106, 206) may include (analog) oscillators and / or filters.

[0278] The embodiments described above are combinations of the components and features of the present disclosure in a specific form. Each component or feature should be considered optional unless otherwise explicitly stated. Each component or feature may be implemented in a form not combined with other components or features. Additionally, it is possible to construct 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 obvious that embodiments may be constructed by combining claims that are not explicitly related in the claims, or that they may be included as new claims by amendment after filing.

[0279] It is obvious to those skilled in the art that the present disclosure may be embodied in other specific forms without departing from the essential features of the present disclosure. Accordingly, the detailed description set forth above should not be interpreted restrictively in all respects and should be considered exemplary. The scope of the present disclosure shall be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present disclosure are included within the scope of the present disclosure.

[0280] The scope of the present disclosure includes software or machine-executable instructions (e.g., operating systems, applications, firmware, programs, etc.) that enable operations according to the methods of various embodiments to be executed on a device or computer, and a non-transitory computer-readable medium on which such software or instructions, etc. are stored and executable on a device or computer. Instructions that may be used to program a processing system to perform the features described in the present disclosure may be stored on or within a storage medium or a computer-readable storage medium, and the features described in the present disclosure may be implemented using a computer program product comprising such a storage medium. The storage medium may 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 may 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 may optionally include one or more storage devices located remotely from the processor(s). Memory or alternatively, non-volatile memory device(s) within memory comprises a non-transient computer-readable storage medium. The features described in this disclosure may be stored in any one of the machine-readable media and integrated into software and / or firmware that can control the hardware of a processing system and allow the processing system to interact with other mechanisms utilizing results according to the embodiments of this disclosure. Such software or firmware may include, but is not limited to, application code, device drivers, operating systems, and execution environments / containers.

[0281] Here, the wireless communication technology implemented in the wireless device (100, 200) of this specification may include LTE, NR, and 6G, as well as Narrowband Internet of Things for low-power communication. For example, NB-IoT technology may be an example of LPWAN (Low Power Wide Area Network) technology and may be implemented according to standards such as LTE Cat NB1 and / or LTE Cat NB2, but is not limited to the names mentioned above. Additionally, or generally, the wireless communication technology implemented in the wireless device (100, 200) of this specification may perform communication based on LTE-M technology. For example, LTE-M technology may be an example of LPWAN technology and may be referred to by various names such as eMTC (enhanced Machine Type Communication). For example, LTE-M technology may be implemented in at least one of various standards such as 1) LTE CAT 0, 2) LTE Cat M1, 3) LTE Cat M2, 4) LTE non-BL (non-Bandwidth Limited), 5) LTE-MTC, 6) LTE Machine Type Communication, and / or 7) LTE M, and is not limited to the names mentioned above. Additionally or generally, wireless communication technology implemented in the wireless device (100, 200) of this specification may include at least one of ZigBee, Bluetooth, and Low Power Wide Area Network (LPWAN) for low-power communication, and is not limited to the names mentioned above. As an example, ZigBee technology can create personal area networks (PANs) related to small / low-power digital communication based on various standards such as IEEE 802.15.4, and may be referred to by various names.

[0282] Although the method proposed in this disclosure has been described with an example applied to 3GPP LTE / LTE-A and 5G systems, it can be applied to various wireless communication systems in addition to 3GPP LTE / LTE-A and 5G systems.

Claims

1. During the active period of cell DTX (discontinuous transmission), receiving one or more first SPS (semi-persistent scheduling) downlink channels from a network by a terminal; and The step of receiving one or more second SPS downlink channels from the network by the terminal during the non-active period of the cell DTX, and A method in which the value of one or more transmission parameters on which the above one or more first SPS downlink channels are based and the value of one or more transmission parameters on which the above one or more second SPS downlink channels are based are different.

2. In Paragraph 1, A method in which one or more of the above transmission parameters include one or more of the number of transmissions, transmission period, interval between transmissions, or whether the transmission opportunity is valid.

3. In Paragraph 1, A method in which the transmission of one or more of the second SPS downlink channels is triggered or directed based on downlink control information from the network.

4. In Paragraph 1, A method in which the transmission of one or more of the second SPS downlink channels is triggered or directed based on a Media Access Control (MAC) control element (CE) from the network.

5. In Paragraph 1, A method in which the above one or more first SPS downlink channels and the above one or more second SPS downlink channels are associated with the first SPS setting.

6. In Paragraph 5, A method in which the values ​​of the one or more transmission parameters on which the one or more first SPS downlink channels are based are provided through the first SPS settings.

7. In Paragraph 6, A method in which, for one or more of the one or more transmission parameters on which the one or more second SPS downlink channels are based, a value adjusted based on a value provided through the first SPS setting is applied.

8. In Paragraph 1, A method in which one or more first SPS downlink channels are associated with a first SPS setting, and one or more second SPS downlink channels are associated with a second SPS setting.

9. In Paragraph 1, A method in which downlink data related to one or more of a specific logical channel or a specific service is received through one or more of the above-mentioned second SPS downlink channels.

10. In Paragraph 1, A method in which settings related to the above cell DTX are provided to the terminal from the above network.

11. In Paragraph 1, A method in which the downlink channel comprises a physical downlink shared channel (PDSCH).

12. One or more transceivers; and It includes one or more processors connected to the above one or more transmitters and receivers, and The above one or more processors are: During the active period of cell DTX (discontinuous transmission), one or more first SPS (semi-persistent scheduling) downlink channels are received from a network through the one or more transceivers; and During the non-active period of the cell DTX, one or more second SPS downlink channels are configured to receive from the network through the one or more transceivers, and A terminal in which the value of one or more transmission parameters on which the above one or more first SPS downlink channels are based and the value of one or more transmission parameters on which the above one or more second SPS downlink channels are based are different.

13. During the active period of cell DTX (discontinuous transmission), transmitting one or more first SPS (semi-persistent scheduling) downlink channels to a terminal by a base station; and The step of transmitting one or more second SPS downlink channels to the terminal by the base station during the non-active period of the cell DTX, and A method in which the value of one or more transmission parameters on which the above one or more first SPS downlink channels are based and the value of one or more transmission parameters on which the above one or more second SPS downlink channels are based are different.

14. One or more transceivers; and It includes one or more processors connected to the above one or more transmitters and receivers, and The above one or more processors are: During the active period of cell DTX (discontinuous transmission), one or more first SPS (semi-persistent scheduling) downlink channels are transmitted to a terminal through the one or more transceivers; and During the non-active period of the cell DTX, one or more second SPS downlink channels are configured to transmit to the terminal through the one or more transceivers, and A base station in which the value of one or more transmission parameters on which the above one or more first SPS downlink channels are based and the value of one or more transmission parameters on which the above one or more second SPS downlink channels are based are different.

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

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