Method executed by user equipment, and user equipment

Abstract

Provided in the present disclosure are a method executed by a user equipment (UE), and a UE. The method comprises: receiving, by means of a MAC CE or RRC signaling for indicating a transmission configuration indication (TCI) state for a low-power wake-up signal (LP-WUS), a TCI state parameter used by the LP-WUS; and activating in a serving cell a TCI state associated with the TCI state parameter, and detecting the LP-WUS on an LP-WUS detection occasion (LP-WUS MO) for the LP-WUS, wherein an interval between the LP-WUS MO and a PDSCH transmitting the MAC CE or RRC signaling is not less than a specified number X of slots.

Description

Methods executed by user equipment and user equipment Technical Field

[0001] This disclosure relates to the field of wireless communication technology, and specifically to a method and related actions performed by a user equipment for determining downlink resource parameters and related reception processes, as well as the corresponding user equipment. Background Technology

[0002] The introduction in this section can help to better understand the various aspects of this disclosure. Therefore, the statements in this section should be read in this context and should not be construed as an admission of what is prior art or what is not prior art.

[0003] In 5G systems, besides latency, reliability, and availability, the energy efficiency of user equipment (UAE) is also a key factor. Typically, UAE consumes tens of milliwatts in idle or inactive states and hundreds of milliwatts in connected states. Depending on the application scenario, UAE may need to be charged weekly or daily, causing inconvenience in practical applications. Therefore, further reducing UAE power consumption and extending battery life are essential for improving energy efficiency and achieving a better user experience. For devices using micro-batteries or those where charging is inconvenient, such as sensors, automatic controllers, and wearable devices, where standby time may be 1-2 weeks or longer, improving their energy efficiency is even more critical.

[0004] User equipment (UE) can typically save power using discontinuous reception (DRX). To ensure connectivity, UE needs to periodically wake up in each DRX cycle to detect the control channel. Even when there is no data transmission for the UE, there is still periodic power consumption. If the UE could only wake up when there is a service transmission requirement, its power consumption would be significantly reduced. Therefore, the UE can be configured with a low-power auxiliary receiver to detect the low-power wake-up signal (LP-WUS) transmitted by the base station. The UE's primary receiver can remain in a low-power state (e.g., sleep mode) until the low-power receiver receives the LP-WUS signal and wakes up the primary receiver according to its instructions for corresponding data processing. This allows the UE's service processing needs to be met with lower power consumption. To achieve this design goal, several problems need to be solved in the system, such as how to correctly switch beams when LP-WUS uses beam transmission, including the switching time, and how to handle collisions. Summary of the Invention

[0005] To address at least some of the aforementioned problems, this disclosure provides a method and a user equipment performed by a user equipment, enabling the UE to correctly use relevant parameters such as TCI state parameters to detect LP-WUS, thereby ensuring that the UE achieves the effects of reduced power consumption and improved system efficiency.

[0006] According to this disclosure, a method performed by a user equipment (UE) is proposed, comprising: receiving TCI state parameters used by LP-WUS via MAC CE or RRC signaling indicating a TCI state for a transmission configuration indication (RCI) for a low-power wake-up signal (LP-WUS); activating a TCI state associated with the TCI state parameters in the serving cell; and detecting the LP-WUS on an LP-WUS detection opportunity, i.e., an LP-WUS MO, wherein the interval between the LP-WUS MO and the PDSCH transmitting the MAC CE or RRC signaling is not less than a predetermined number of time slots.

[0007] Preferably, the method further includes:

[0008] When time slot T is set to time slot k+X, where time slot k is a PUCCH time slot used to transmit HARQ-ACK information for the PDSCH, and the number of time slots X is the difference between the specified number of time slots and the time slot interval between the time slot for transmitting the PDSCH and time slot k,

[0009] The TCI state is activated in the first time slot after time slot T, i.e., time slot T+1, if at least one of the following conditions is met:

[0010] - The LP-WUS MO starts from time slot T+1 or after time slot T+1;

[0011] - The LP-WUS MO does not overlap with time slot T+1; and

[0012] -Time slot T+1 is the activity time.

[0013] Preferably, the method further includes:

[0014] When time slot T is set to time slot k+X, where time slot k is a PUCCH time slot used to transmit HARQ-ACK information for the PDSCH, and the number of time slots X is the difference between the specified number of time slots and the time slot interval between the time slot for transmitting the PDSCH and time slot k,

[0015] The TCI state is activated in the next time slot of the later of the last time slot of the LP-WUS MO and the time slot T if at least one of the following conditions is met:

[0016] - The LP-WUS MO begins in time slot T or begins before time slot T; and

[0017] - The LP-WUS MO overlaps with the time slot T.

[0018] Preferably, the method further includes:

[0019] Given that the target TCI state is known, detect the LP-WUS of the serving cell's target TCI state starting from the second time slot where the TCI state handover occurs; and

[0020] When the target TCI state is unknown, the LP-WUS of the serving cell is detected starting from the third time slot, which is different from the second time slot, where the TCI state handover occurs.

[0021] Furthermore, according to this disclosure, a method performed by a user equipment (UE) is proposed, comprising: receiving a TCI state parameter of a CORESET associated with a low-power wake-up signal LP-WUS via MAC CE or RRC signaling indicating a TCI state for a transmission configuration of a UE-specific PDCCH; activating the TCI state associated with the TCI state parameter in the serving cell; and detecting the LP-WUS on an LP-WUS detection opportunity, i.e., an LP-WUSMO, for the LP-WUS, wherein the interval between the LP-WUSMO and the PDSCH transmitting the MAC CE or RRC signaling is not less than a predetermined number of time slots X.

[0022] Preferably, the method further includes:

[0023] When detecting LP-WUS, use the same TCI state or quasi-co-located QCL source as the CORESET / PDCCH associated with LP-WUS.

[0024] When time slot T is set to time slot k+X, where time slot k is a PUCCH time slot used to transmit HARQ-ACK information for the PDSCH, and the number of time slots X is the difference between the specified number of time slots and the time slot interval between the time slot for transmitting the PDSCH and time slot k,

[0025] The TCI state is activated in the first time slot after time slot T, i.e., time slot T+1, if at least one of the following conditions is met:

[0026] - The LP-WUS MO starts from time slot T+1 or after time slot T+1;

[0027] - The LP-WUS MO does not overlap with time slot T+1; and

[0028] -Time slot T+1 is the activity time.

[0029] Preferably, the method further includes:

[0030] When the UE detects LP-WUS, it uses the same TCI state or QCL source as the CORESET / PDCCH associated with LP-WUS.

[0031] When time slot T is set to time slot k+X, where time slot k is a PUCCH time slot used to transmit HARQ-ACK information for the PDSCH, and the number of time slots X is the difference between the specified number of time slots and the time slot interval between the time slot for transmitting the PDSCH and time slot k,

[0032] The TCI state is activated in the next time slot of the later of the last time slot of the LP-WUS MO and the time slot T if at least one of the following conditions is met:

[0033] - The LP-WUS MO begins in time slot T or begins before time slot T; and

[0034] The LP-WUS MO overlaps with the time slot T.

[0035] Additionally, according to this disclosure, a user equipment is proposed, comprising: a processor; and a memory storing instructions, wherein the instructions, when executed by the processor, perform the methods described above.

[0036] Invention Effects

[0037] According to this disclosure, the UE can correctly use relevant parameters such as TCI status parameters to detect LP-WUS, ensuring that the UE achieves the effect of reducing power consumption and improving system efficiency. Attached Figure Description

[0038] The above and other features of this disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, wherein:

[0039] Figure 1 is a schematic diagram illustrating the relationship between the time slots for transmitting PDSCH with MAC CE, the time slots for transmitting HARQ-ACK information for PDSCH, and the time slots occupied by LP-WUS MO according to the present disclosure.

[0040] Figure 2 is a flowchart illustrating a method performed by a user equipment according to Embodiment 1 of the present disclosure.

[0041] Figure 3 is a flowchart illustrating a method performed by a user equipment according to Embodiment 2 of the present disclosure.

[0042] Figure 4 is a schematic block diagram illustrating the user equipment (UE) involved in this disclosure. Detailed Implementation

[0043] The present disclosure will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the present disclosure should not be limited to the specific embodiments described below, which are provided merely as examples to convey the scope of the subject matter to those skilled in the art. Furthermore, for the sake of simplicity, detailed descriptions of well-known technologies not directly related to the present disclosure have been omitted to prevent confusion in understanding the present disclosure.

[0044] Generally, unless a different meaning is clearly given and / or implied in the context of its use, all terms used in this disclosure shall be interpreted according to their ordinary meaning in the relevant art. Unless expressly stated otherwise, all references to an element, device, apparatus, component, part, step, etc., shall be publicly interpreted as referring to at least one instance of that element, device, apparatus, component, part, step, etc. Unless it must be explicitly described that a step follows or precedes another step and / or implicitly imply that a step must follow or precede another step, the steps of any method in the embodiments of this disclosure need not be performed in the exact order disclosed. Where appropriate, any feature of any embodiment of this disclosure may be applied to any other embodiment. Similarly, any advantage of any embodiment may be applied to any other embodiment, and vice versa.

[0045] The following description uses 5G / NR mobile communication systems and their subsequent evolutions as example application environments to specifically describe several implementations according to this disclosure. However, it should be noted that this disclosure is not limited to the following implementations, but is applicable to many other wireless communication systems, such as communication systems after 5G and 4G and 3G mobile communication systems before 5G, 802.11 wireless networks, etc.

[0046] The following describes some of the terminology used in this disclosure. Unless otherwise specified, the terminology used in this disclosure is as defined herein. The terminology given in this disclosure may be used differently in 4G / LTE, 4G+ / LTE-Advanced, LTE-AdvancedPro, 5G / NR and later wireless communication systems or other communication systems, but a uniform terminology is used in this disclosure to simplify description. When applying the methods and processes of this disclosure to a specific system, the terminology used in that system can be substituted.

[0047] 3GPP: 3rd Generation Partnership Project

[0048] LTE: Long Term Evolution

[0049] NR: New Radio, New Wireless, New Air Interface

[0050] UE: User Equipment

[0051] gNB: NR base station

[0052] BWP: Bandwidth Part

[0053] SFN: System frame number

[0054] OFDM: Orthogonal Frequency Division Multiplexing

[0055] SCS: Sub-carrier spacing

[0056] RB: Resource Block

[0057] TDD: Time Division Duplexing

[0058] FDD: Frequency Division Duplexing

[0059] CSI: Channel State Information

[0060] DCI: Downlink Control Information

[0061] CRC: Cyclic Redundancy Check

[0062] QCL: Quasi-co-location

[0063] HARQ: Hybrid Automatic Repeat Request.

[0064] CORESET: Control resource set.

[0065] MIB: Master Information Block

[0066] SIB: System Information Block

[0067] SSB: SS / PBCH block, Synchronization Signal / Physical Broadcast Channel Block

[0068] SRS: Sounding Reference Signal

[0069] DMRS: Demodulation Reference Signal

[0070] CSI-RS: Channel State Information Reference Signal

[0071] RACH: random-access channel

[0072] PBCH: Physical broadcast channel

[0073] PUCCH: Physical Uplink Control Channel

[0074] PUSCH: Physical Uplink Shared Channel

[0075] PRACH: Physical random-access channel

[0076] PDSCH: Physical downlink shared channel

[0077] PDCCH: Physical downlink control channel

[0078] UL-SCH: Uplink Shared Channel

[0079] DL-SCH: Downlink Shared Channel

[0080] C-RNTI: Cell Radio Network Temporary Identifier

[0081] P-RNTI: Paging RNTI, Temporary Identifier for Paging Wireless Network

[0082] RA-RNTI: Random Access RNTI, Temporary Identifier for Random Access Wireless Networks

[0083] CS-RNTI: Configured Scheduling RNTI, a temporary identifier for configuring and scheduling wireless networks.

[0084] SI-RNTI: System Information RNTI, Temporary Identifier for Wireless Networks

[0085] TC-RNTI: Temporary C-RNTI, Temporary Cell Radio Network Identifier

[0086] LP-WUS: Low Power Wake-Up Signal

[0087] RRM: Radio Resource Management

[0088] RRC: Radio Resource Control

[0089] TCI: Transmission Configuration Indicator

[0090] MSB: Most Significant Bit

[0091] LSB: Least Significant Bit

[0092] PO: paging occasion

[0093] PF: paging frame

[0094] RRM: Radio Resource Management

[0095] PCI: Physical Cell Identifier

[0096] UAI: UE Assistance Information

[0097] The following is a description of the technologies associated with this disclosure. Unless otherwise specified, the same terms in the specific embodiments have the same meaning as in the associated technologies.

[0098] It is worth noting that the User Equipment (UE) involved in this disclosure refers to any terminal device that accesses the communication network and receives services, such as a smartphone, mobile phone, tablet computer, mobile station, access terminal, sensor, wearable device, etc. When describing the methods used by the user equipment or performing related processes in this disclosure, terms such as "user" and "terminal" may be used. In the relevant descriptions, this disclosure does not make specific distinctions or limitations between these different terms and may use them interchangeably to describe the relevant steps and methods from different perspectives. Network equipment refers to devices that communicate with the user equipment, including but not limited to wireless base stations, gNBs, eNBs, wireless access points, wireless relays, user equipment with relay capabilities, etc. This disclosure may use a wireless base station as one form of network equipment implementation, but in specific implementations, other forms of network equipment can be easily used as replacements.

[0099] In NR networks, User Equipment (UE) can maintain network connectivity even when there is no service data transmission, enabling always-on network service. For example, UEs in idle state (RRC_IDLE state) or inactive state (RRC_INACTIVE state) can periodically check if the base station has sent them paging information. When paging information is detected, the UE can establish a radio connection based on the paging information and related signaling to transmit service data. UEs in connected state (RRC_CONNECTED state) configured with Discontinuous Reception (DRX) need to periodically start relevant timers according to the DRX configuration to detect PDCCH and receive or transmit related PDSCH / PUSCH based on the DCI in the PDCCH.

[0100] For connected UEs, the DRX parameters configured for the UE include timer parameters such as drx-onDurationTimer and drx-InactivityTimer, which indicate the runtime of relevant UE timers. The UE can determine an on-duration based on the DRX period parameters. The UE enters the active time from the start time of the on-duration, starts the drx-onDurationTimer, and detects the PDCCH. Once a PDCCH is successfully decoded during the active time, the UE starts a timer drx-InactivityTimer. When the UE receives a PDCCH related to a first transmission (new transmission), the UE can restart the drx-InactivityTimer. During the execution of this timer, the UE remains in the active time. Additionally, when the UE is waiting for a possible retransmission, the UE can start the corresponding retransmission timer drx-RetransmissionTimerDL or drx-RetransmissionTimerUL based on the downlink or uplink transmission. During the execution of these retransmission timers, the UE also remains in the active time to detect possible retransmission scheduling. In one example, the UE's active time includes:

[0101] - The drx-onDurationTimer or drx-InactivityTimer for the corresponding DRX group of the cell is currently running;

[0102] -drx-RetransmissionTimerDL or drx-RetransmissionTimerUL runs on any cell in the DRX group;

[0103] - The UE's random access timer ra-ContentionResolutionTimer or msgB-ResponseWindow is running;

[0104] - When the UE sends a scheduling request (SR) via PUCCH and suspends;

[0105] - When a RAR (random access response) is successfully received, but a new PDCCH for the C-RNTI of the MAC entity has not yet been received; the RAR is triggered by a random access preamble, and the preamble is not selected by the MAC entity from the CBRA (contention-based random access) preamble.

[0106] The UE performs PDCCH detection according to the DRX-related configuration. Even when there is no service data to transmit, the UE still performs the relevant detection, consuming the energy stored in the user equipment. One feasible method to reduce user power consumption is for the user equipment to use a low-power wake-up signal receiver (LR) to detect the wake-up signal (WUS) sent by the base station. Since the WUS is used for LR detection, it is also called LP-WUS (low power WUS). When there is no data transmission, the user equipment's main radio or main receiver (MR) remains in sleep mode to minimize the user equipment's power consumption; when data needs to be transmitted, the base station notifies the user equipment through LP-WUS. When the user equipment detects the wake-up information carried in the LP-WUS, the UE wakes up the MR and performs corresponding data processing. The LP-WUS can carry relevant information needed to wake up the user equipment, such as information related to the user equipment ID, or indicator bits corresponding to the UE or UE packet, or codeword values ​​related to the UE or UE packet, or specific sequences corresponding to the UE or UE packet, etc., which can be called LP-WUS information. User equipment (UE) can determine whether it is woken up by the LP-WUS signal based on the LP-WUS information. Only when the UE detects LP-WUS information waking up itself, its user group, or all users, will it wake up the master receiver to perform relevant data transmission. This includes detecting the paging PDCCH on the associated paging opportunity (PO), transmitting PRACH, starting relevant timers, and performing PDCCH detection, etc. In this way, the UE can maintain its connection to the network with minimal power consumption without affecting its rapid response capability to service transmission demands. When implementing LR and MR functions, the UE may not necessarily use independent modules; it may simply be a logical division of internal modules and functions. No specific limitations are made here.

[0107] To conserve UE power, the base station can use LP-WUS to indicate whether the UE starts a timer (drx-onDurationTimer) at the beginning of an on-duration DRX cycle, thus entering the active period. Furthermore, if the UE is already in the active period, it does not need to detect LP-WUS.

[0108] Besides this method, the base station can also configure a dedicated LP-WUS timer (e.g., called lpwus-PDCCHMonitoringTimer) different from the aforementioned timers (drx-onDurationTimer, etc.) and use LP-WUS to instruct the UE whether to start this timer, enter the active time, and detect the PDCCH. The base station uses LP-WUS to instruct the UE whether to start lpwus-PDCCHMonitoringTimer. In this case, the UE does not need to start the drx-onDurationTimer. During the operation of lpwus-PDCCHMonitoringTimer, once a PDCCH is successfully decoded during the active time, the UE can also start a timer drx-InactivityTimer. When the UE receives a PDCCH related to its first transmission (new transmission), the UE can restart the drx-InactivityTimer. During the operation of this timer, the UE maintains its active time.

[0109] For simplicity, when a UE uses LP-WUS, and the base station has configured DRX parameters (including drx-onDurationTimer, drx-InactivityTimer, etc.) but has not configured a dedicated LP-WUS timer (lpwus_PDCCHMonitoringTimer), the process of the UE starting drx-onDurationTimer and related timers according to LP-WUS instructions and detecting the PDCCH is referred to as LP-WUS Mode 1. When a dedicated LP-WUS timer is configured, the process of the UE starting lpwus_PDCCHMonitoringTimer and related timers according to LP-WUS and detecting the PDCCH is referred to as LP-WUS Mode 2. Unless otherwise specified, the methods described in this disclosure can be applied to either LP-WUS Mode 1 or LP-WUS Mode 2.

[0110] The UE's active time is the total duration for which the UE detects the PDCCH. In LP-WUS mode 1, the active time includes the "on-duration" of the DRX cycle (drx-onDurationTimer runtime), the time the UE performs continuous reception while the drx-Inactivity-timer has not expired, and the time the UE performs continuous reception while waiting for a retransmission opportunity, etc. In LP-WUS mode 2, the active time includes the lpwus-PDCCHMonitoringTimer runtime, the time the UE performs continuous reception while the drx-InactivityTimer has not expired, and the time the UE performs continuous reception while waiting for a retransmission opportunity, etc.

[0111] In NR networks, base stations can configure one or more sets of LP-WUS resources and other parameters to configure parameters such as the time-domain period, offset, frequency-domain location, and coding method used by LP-WUS. Based on these parameters, several time-frequency resources can be determined for base station transmission of LP-WUS and UE LP-WUS detection. Since the time-domain locations of these resources can repeat periodically, and the base station does not always transmit LP-WUS on all of these resources (for example, if no UE needs to be woken up in a certain DRX cycle, LP-WUS may not be transmitted), these time-frequency resources that may be used for LP-WUS detection are also called LP-WUS monitoring occasions (LP-WUS MOs, or LMOs). In this disclosure, for ease of description, sometimes the description is from the perspective of the LP-WUS resources configured by the base station, sometimes from the perspective of the LP-WUS MOs used for UE detection, or LP-WUS is used to describe the related processes and steps; these descriptions are considered equivalent and interchangeable in the following text.

[0112] LP-WUS can use OOK (On-Offkeying) waveforms for transmission to reduce receiver complexity and UE power consumption. For compatibility with existing NR equipment, OOK can be generated using a method compatible with downlink CP-OFDM symbols in NR, making it easy for base stations to transmit signals with different waveforms. For example, the base station can use DFT-IFFT to generate the LP-WUS OOK symbol. In this case, one OFDM symbol can contain an integer F OOK symbols within the LP-WUS bandwidth, where F is an integer from 1 / 2 / 4 / 8 / 16. Therefore, relevant LP-WUS time-domain parameters, such as length and position, can also be described using OFDM symbols, time slots, and frames. When generating LP-WUS, the base station may use different multi-carrier parameters to generate OOK symbols, such as using CP-OFDM symbols with different subcarrier spacings (SCS) for LP-WUS generation. These SCS parameters can also be simply referred to as the LP-WUS SCS parameters.

[0113] Depending on different service requirements, the resources configured by the base station for transmitting one LP-WUS may occupy several OFDM symbols. These symbols may be on one time slot or multiple time slots, meaning that one LP-WUS (or LP-WUS MO) may occupy one or more time slots. In addition, the base station may also configure a repetition parameter to indicate repeated transmission of LP-WUS on multiple LP-WUS MOs, transmitting the same LP-WUS information to enhance downlink reception performance.

[0114] In NR, base stations can apply different SCS parameters to transmit signals in different frequency bands. For example, in the FR1 band, a base station can use an SCS of 15kHz or 30kHz for downlink signal transmission; in the FR2 band, it can use an SCS of 60kHz or 120kHz; and in the FR2-2 band, it may even use an SCS of 480kHz or 960kHz. These SCS parameters are typically represented using the μ parameter in NR, for example, an SCS of 2... μ *15kHz means that μ=0 corresponds to an SCS of 15kHz; μ=1 corresponds to an SCS of 30kHz; ...; μ=6 corresponds to an SCS of 960kHz, and so on. Using the μ parameter to describe the SCS is completely equivalent to directly using the size of the SCS (e.g., 15kHz / 30kHz...).

[0115] In addition, the LP-WUS transmitted by the base station occupies a certain bandwidth. For ease of explanation, the bandwidth used by LP-WUS can also be configured / described using the number of subcarriers of the OFDM symbol (i.e., the number of REs, which can also be converted into the number of RBs). Furthermore, for the convenience of UE receiver implementation, some guard bands are reserved outside the effective bandwidth and are not used for signal transmission; these can be called guard bands. In this invention, unless otherwise specified, the frequency domain bandwidth used for transmitting LP-WUS includes the bandwidth actually used for transmitting OOK symbols and the guard band.

[0116] The base station can also transmit LP-SS (lower power synchronization signal) for UE to perform related synchronization and RRM measurements. LP-SS can use similar waveforms and modulation schemes as LP-WUS, etc. The parameter descriptions of LP-WUS in this disclosure, such as SCS, bandwidth RB, and symbols, also apply to LP-SS and will not be described in detail here.

[0117] Base stations may use specific spatial transmission parameters (i.e., use specific beams) to transmit LP-WUS to achieve better downlink coverage, better downlink reception performance, and interference reduction. An LP-WUS can satisfy QCL relationships with other signals (e.g., SSBs or CSI-RS) or channels (e.g., PDCCH) or CORESETs in NR, allowing the UE to obtain relevant spatial transmission parameters based on these reference signals / channels for LP-WUS detection. For example, a base station can configure an LP-WUS to satisfy QCL-typeA or QCL-typeC relationships with an SSB of sequence number S in frequency band FR1 (i.e., the LP-WUS uses QCL-typeA or QCL-typeC QCL with SSB S), or satisfy QCL-typeC and QCL-typeD relationships with an SSB of sequence number S in frequency band FR2. The UE can then use the relevant spatial transmission parameters of the SSB of that SSB sequence number for the detection and reception of the LP-WUS.

[0118] Spatial transmission parameters for a signal / channel are typically configured using TCI-state parameters. A TCI-state parameter can include various aspects, such as the signal ID, the cell ID where the signal resides, and the QCL information used. The QCL information may include the ID or sequence number of the QCL source used by the signal. A QCL source is a reference signal that satisfies a certain QCL relationship with the signal, such as SSB, CSI-RS, etc. The QCL information may also include the QCL type (including QCL type A / B / C / D, etc.) between the signal / channel and the reference signal. The base station may also configure multiple TCI-state parameters (e.g., through a TCI-state list) and activate a specific TCI-state using MAC layer control elements (MAC CE) or DCI signaling for the UE to receive related signals. The base station may also reconfigure / update the TCI-state parameters of the signal via RRC signaling. The base station can configure / activate TCI-state parameters for CORESET / PDCCH, etc., in this way. For some CORESET / PDCCHs that do not have TCI-state parameters configured, the UE may also determine its QCL parameters according to some default methods, such as using the sequence number determined in the most recent random access RA procedure as S. RA The SSB serves as the QCL source for this CORESET / PDCCH.

[0119] In NR, the CORESET parameter can be used to configure some parameters used by PDCCH, including the TCI-state used by PDCCH.

[0120] When the base station uses MAC CE or RRC to configure / activate the TCI state, the UE can determine whether the indicated TCI state is known or unknown according to certain methods, such as the methods in the following example:

[0121] The TCI state is known if the following condition is met; otherwise, the TCI state is unknown:

[0122] Within a period, this period is from the last transmission of the RS (refereence signal) resource used for L1-RSRP measurement to report the target TCI state, to the completion of the TCI state transition. The RS resource used for L1-RSRP measurement is either an RS in the target TCI state or an RS from QCL to the target TCI state, and:

[0123] The -TCI state switching command is received within 1280ms after the last transmission of the RS resource used for beam reporting or measurement.

[0124] - Before executing the TCI state switch command, the terminal sends at least one L1-RSRP report of the target TCI state.

[0125] - The TCI state remains detectable during TCI state transitions.

[0126] - The SSB associated with the TCI state remains detectable during TCI state transitions.

[0127] -TCI state signal-to-noise ratio (SNR) > -3dB

[0128] The base station may use RRC signaling to configure one or more TCI-state parameters for an LP-WUS (or LP-WUS resource, or LP-WUS MO), and activate a TCI-state using methods such as MAC CE, for the UE to detect LP-WUS in the LP-WUS MO.

[0129] The base station may also configure an LP-WUS to be associated with a specific CORESET or PDCCH. In this case, the LP-WUS can use all or part of the same QCL parameters as the associated CORESET or PDCCH, such as having the same QCL source. The base station can activate a TCI-state via MAC signaling or other means, activating the TCI-state of the associated CORESET or PDCCH. The UE can then determine the QCL parameters of the LP-WUS based on the TCI-state of the associated CORESET or PDCCH, which is used by the UE to detect the LP-WUS in LP-WUS MO.

[0130] When the UE determines the TCI-state or QCL source of LP-WUS based on RRC signaling or MAC CE, it needs to determine when to apply the TCI-state or QCL source in the relevant activation signaling, and how to handle issues such as conflicts, so that the base station and UE can synchronously apply the same parameters to ensure smooth communication. This disclosure solves these problems by implementing relevant methods and steps, enabling the UE to correctly use the relevant parameters to detect LP-WUS, ensuring that the UE achieves reduced power consumption and improved system efficiency.

[0131] Furthermore, this disclosure uses a UE in the connected state (RRC_CONNECTED state) as an example to describe the relevant methods and processes. For simplicity, the description of the state may be omitted in the relevant steps, and the UE or user equipment may be referred to directly. If the UE is in other states, such as the idle state (RRC_IDLE state) or the inactive state (RRC_INACTIVE state), it may also apply LP-WUS to detect wake-up information to save power consumption. In this case, similar methods or certain steps may also be applied.

[0132] The implementation of each step in this disclosure will be described in more detail below in specific embodiments.

[0133] In one embodiment of this disclosure, the base station can indicate the TCI state used by LP-WUS using a certain method. For example, the base station can transmit a MAC CE to the UE via PDSCH, using the MAC CE to indicate that LP-WUS is activating / applying a TCI state. Such a MAC CE is used to activate a TCI state, and can also be simply referred to as a MAC CE activation command or MAC CE command. This TCI state is one of the TCI states configured by the base station for the LP-WUS via RRC. Typically, from receiving the PDSCH containing the MAC CE to being able to apply the MAC CE command, the UE needs a certain processing time. This time is usually calculated in terms of the number of time slots, that is, the UE determines the first time slot for applying the MAC CE command from the time slot of a PDSCH that transmits the MAC CE, based on a certain number of time slots.

[0134] Figure 2 is a flowchart illustrating a method performed by a user equipment according to Embodiment 1 of the present disclosure.

[0135] As shown in Figure 2, in step 201, the base station receives the TCI status parameters used by LP-WUS via a MAC CE indicating the TCI status for LP-WUS. This MAC CE uses a MAC sub-header with a specific LCID / eLCID (Logical Channel ID) to indicate the TCI status of LP-WUS. In a specific example, as shown in the bit allocation of the fields in Table 1, the MAC CE has a fixed size of 16 bits, and the fields include:

[0136] -Serving Cell ID: Indicates the identity of the serving cell for which this MAC CE is applied, with a length of 5 bits;

[0137] -LP-WUS ID: Indicates the ID of an LP-WUS MO or LP-WUS resource, with a length of 4 bits;

[0138] -TCI Status ID: Indicates the TCI status ID applied to LP-WUS. This TCI status ID is one of the TCI status IDs configured by the base station through the TCI status list, and its length is 7 bits.

[0139] Table 1:

[0140] Then, in step 203, the UE that receives the MAC CE activates the TCI state associated with the TCI state ID in the serving cell according to the relevant instructions, and detects LP-WUS on the LP-WUS MO associated with the LP-WUS ID.

[0141] In different application scenarios, depending on the different LP-WUS parameters configured by the base station, an LP-WUS MO may occupy one or more time slots. When the UE detects LP-WUS on an LP-WUS MO, it usually needs to ensure that the symbols of LP-WUS on that LP-WUS MO use the same TCI state or QCL source.

[0142] Optionally, the UE will apply the MAC CE command to LP-WUS detection (on an LP-WUS MO) if the following conditions are met:

[0143] The interval between the first time slot of -LP-WUS MO and the time slot of PUCCH is no less than X time slots.

[0144] Here, PUCCH is used to transmit HARQ-ACK information for the PDSCH where the MAC CE is located. The interval between PUCCH and PDSCH is usually indicated by the DCI that schedules the PDSCH, and is determined according to the parameters configured in the RRC (e.g., dl-DataToUL-ACK).

[0145] Optionally, the UE determines the value of X (number of time slots) according to one of the following methods.

[0146] -If the base station is not configured with a specific number of time slots

[0147] -If the base station configures k for the UE mac parameter,

[0148] -X is the number of time slots configured for the base station.

[0149] -X represents the number of time slots determined based on the UE's capabilities.

[0150] μ is the SCS parameter used by the PUCCH configured in this time slot. This refers to the number of time slots in a subframe determined by μ. For example, the value corresponding to μ can be determined according to Table 2. value.

[0151] Table 2

[0152] Optionally, when the UE receives a MAC CE activation command indicating one of the TCI states of LP-WUS, the UE applies the activation command in / from the first time slot (which is the first time slot after time slot T, i.e., time slot T+1) if at least one of the following conditions is met.

[0153] -LP-WUS MO starts from time slot T+1 or after time slot T+1;

[0154] -LP-WUS MO does not overlap with time slot T+1; and

[0155] -Time slot T+1 is the activity time.

[0156] Optionally, the UE applies the activation command in the next time slot of the later of the last time slot and time slot T of the LP-WUS MO if at least one of the following conditions is met:

[0157] -LP-WUS MO begins in time slot T or before T; and

[0158] -LP-WUS MO overlaps with time slot T.

[0159] Here, time slot T is time slot k+X.

[0160] Optionally, the UE determines the value of X (number of time slots) according to one of the following methods.

[0161] -If the base station is not configured with a specific number of time slots

[0162] -If the base station configures the kmac parameter for the UE.

[0163] -X is the number of time slots configured for the base station.

[0164] -X represents the number of time slots determined based on the UE's capabilities.

[0165] Wherein, time slot k is the time slot in which the UE will transmit the PUCCH, which is used to transmit HARQ-ACK information for the PDSCH where the MAC CE is located. μ is the SCS parameter configured for the PUCCH in this time slot. The time slot interval between the PUCCH and PDSCH is usually indicated by the DCI of the PDSCH scheduling, and determined according to the parameters configured in the RRC (e.g., dl-DataToUL-ACK).

[0166] Figure 1 provides a specific example. In Figure 1, time slot n is the time slot in which the base station transmits the PDSCH with MAC CE, and time slot k is the time slot in which the UE transmits the PUCCH containing HARQ-ACK information for the PDSCH. The time slot interval between the two is T. HARQ The UE can determine time slot T and the next time slot T+1 using the method described above. The UE can determine the position of the LP-WUS MO in the time domain and the time domain length it occupies based on parameters such as the LP-WUS period and offset. In one example, if the UE determines that the LP-WUS MO starts from time slot T+1, the UE will determine to apply the MAC CE from time slot T+1.

[0167] In another example, if the UE determines that the LP-WUSMO starts from time slot T, and the LP-WUSMO occupies two time slots, that is, occupying some or all of the symbols on time slot T and time slot T+1, the UE determines to apply the MAC CE from time slot T+2.

[0168] In an optional embodiment, the UE further determines the LP-WUS detection on the relevant LP-WUS MO based on whether the TCI state indicated by the MAC CE is known or unknown (and whether the TCI state is in the PDSCH active list, etc.). For example, if the UE applies the TCI state, additional measurement or synchronization time is required before performing LP-WUS detection using the relevant TCI state parameters.

[0169] Optionally, the UE receives a PDSCH with MAC CE in time slot n. If the target TCI state of the LP-WUS used for indication is known, the UE should be able to receive it in time slot n. In the first time slot thereafter, after the TCI state handover of the serving cell occurs, apply the LP-WUS of the target TCI state of the serving cell (i.e., the TCI state indicated by MAC CE) (if it exists). If the LP-WUS MO starts in time slot n+T HARQ +X or n+T HARQ Before the +X time slot, the terminal should be able to receive the old TCI state LP-WUS (if it exists) in the LP-WUS MO.

[0170] Optionally, the UE does not need to process data from time slot n+T. HARQ +X+1 to the time slot from the completion of the TCI state switch (that is, the time slot) The LP-WUS on the overlapping LP-WUS MOs exists in the time slots. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE starts a relevant timer (e.g., drx-onDurationTimer) on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE determines whether to start a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection according to a second indication. For example, if the base station configures the second indication through RRC signaling, the UE starts a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection; otherwise, the UE does not need to start a relevant timer on the relevant DRX cycle.

[0171] Where T HARQ It is the time (number of time slots) between DL data transmission and HARQ-ACK confirmation, that is, the time between the time slot of the PDSCH where the MAC CE is located sent by the base station and the time slot of the PUCCH that the UE needs to transmit. The PUCCH is used to transmit HARQ-ACK information for the PDSCH where the MAC CE is located.

[0172] -T first-SSB This refers to the time when the base station sends the first SSB after the MAC CE command is decoded by the terminal. This SSB should be in the target TCI state (signal) and be either QCL-TypeA or QCL-TypeC.

[0173] -T SSB-proc =2ms;

[0174] - If the target TCI state is not in the list of active TCI states in PDSCH, then TO k =1, otherwise 0.

[0175] NR-slot-length is the slot length in NR, used to transfer TO.k *(T first-SSB +T SSB-proc The number of milliseconds is converted to the number of time slots, which is numerically equal to

[0176] Optionally, if the target TCI state is unknown, the UE should be able to receive a PDSCH with MAC CE indicating the TCI state of LP-WUS in time slot n. In the first time slot thereafter, after a TCI state handover, the LP-WUS of the target TCI state (i.e., the TCI state indicated by the MAC CE) of the serving cell is applied (if it exists). If the LP-WUS MO starts in the time slot... Or Before the time slot, the terminal should be able to receive the old TCI state LP-WUS (if it exists) in the LP-WUS MO.

[0177] Optionally, the UE does not need to process data from time slot n+T. HARQ The time slot for switching from +X+1 to TCI state (i.e., the time slot) The LP-WUS on the overlapping LP-WUS MOs exists in the time slots. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE starts a relevant timer (e.g., drx-onDurationTimer) on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE determines whether to start a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection according to a second indication. For example, if the base station configures the second indication through RRC signaling, the UE starts a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection; otherwise, the UE does not need to start a relevant timer on the relevant DRX cycle.

[0178] here,

[0179] -For the FR1 band, T L1-RSRP =0. For the FR2 band, T L1-RSRP The receiving beam refinement time. The UE can determine the relevant refinement time based on the SSB or CSI-RS used for L1-RSPR measurement.

[0180] -For CSI-RS based L1-RSRP measurements, TO uk=1, and for L1-RSRP measurements using SSB, and without involving QCL-Type D TCI state switching (e.g., in the FR1 band, when LP-WUS and SSB are QCL-Type C), TO uk =0

[0181] - For TCI state switching, only other QCL types are involved. uk =1

[0182] - When the MAC CE command indicates QCL type C, T first-SSB It is the time when the base station sends the first SSB after the MAC CE command is decoded by the terminal. The SSB should be QCL-TypeA or QCL-TypeC of the target TCI state.

[0183] - When the TCI state transition indicated by the MAC CE command involves QCL typeD, T first-SSB This refers to the time when the base station sends the first SSB after the L1-RSRP measurement; this SSB should be QCL-Type D or QCL-Type C of the target TCI state.

[0184] -T SSB-proc =2ms;

[0185] In another embodiment of this disclosure, the base station may also configure LP-WUS to be associated with CORESET / PDCCH. The base station can use MAC CE to indicate / activate the TCI state of the CORESET associated with LP-WUS. This MAC CE may also be simply referred to as a MAC CE activation command or MAC CE command. The UE determines the TCI state or QCL source used by LP-WUS based on the TCI state used by the associated CORESET / PDCCH. For example, the base station sends a MAC CE to indicate the TCI state of a specific PDCCH of the UE. After a period of time, the UE applies the TCI state parameter corresponding to the TCI state ID in the MAC CE to receive a PDCCH of a CORESET using the CORESET ID in the MAC CE on a serving cell. The UE can determine the TCI state used by LP-WUS based on the interval between the LP-WUS MO and the PDSCH where the MAC CE is located, and the TCI state of the CORESET / PDCCH.

[0186] Figure 3 is a flowchart illustrating a method performed by a user equipment according to Embodiment 2 of the present disclosure.

[0187] As shown in Figure 3, in step 301, the base station receives the TCI status parameters of the CORESET associated with LP-WUS through MAC CE, which is used to indicate the TCI status of the UE-specific PDCCH.

[0188] Then, in step 303, the UE that receives the MAC CE activates the TCI state associated with the TCI state ID in the serving cell according to the relevant instructions, and detects LP-WUS on the LP-WUS MO for the LP-WUS.

[0189] Optionally, when detecting LP-WUS, the UE uses the same TCI state or QCL source as the CORESET / PDCCH associated with LP-WUS. If the UE receives a MAC CE activation command activating one of the TCI states associated with the CORESET, the UE applies the activation command in / from a first time slot, which is the first time slot after time slot k+X, if at least one of the following conditions is met:

[0190] - The associated LP-WUS MO starts in the first time slot or after the first time slot;

[0191] - The associated LP-WUS MO does not overlap with the first time slot; and

[0192] -UE is active during the first time slot.

[0193] Optionally, when detecting LP-WUS, the UE uses the same TCI state or QCL source as the CORESET / PDCCH associated with LP-WUS. If the UE receives a MAC CE activation command activating one of the TCI states associated with the CORESET, the UE applies the activation command in the later of the first time slot after time slot k+X, or in the first time slot after the last time slot of an associated LP-WUS MO, if at least one of the following conditions is met:

[0194] -LP-WUS MO begins in slot k+X or before slot k+X; and

[0195] -LP-WUS MO overlaps with time slot k+X.

[0196] Optionally, when the time interval between the start time slot of LP-WUS MO and the time slot of PUCCH is greater than X, the UE uses the same TCI state or QCL source as the associated CORESET / PDCCH to detect LP-WUS. Otherwise, the UE uses the TCI state or QCL source used by the associated CORESET / PDCCH before the TCI state activated by the MAC CE to detect LP-WUS on LP-WUS MO.

[0197] Optionally, the UE determines the value of X (number of time slots) according to one of the following methods.

[0198]

[0199] -If the base station configures the kmac parameter for the UE.

[0200] Wherein, time slot k is the time slot in which the UE will transmit PUCCH, which is used to transmit HARQ-ACK information for the PDSCH where the MAC CE is located. μ is the SCS parameter configured for the PUCCH in this time slot.

[0201] In an optional embodiment, the UE further determines the detection of LP-WUS based on whether the target TCI state is known or unknown (and whether the TCI state is in the active list of PDSCH, etc.).

[0202] Optionally, when the UE receives the TCI status command associated with the CORESET indicated by the MAC CE, if the target TCI status is known, and the UE receives a PDSCH with MAC CE in time slot n to indicate the TCI status, the UE should be able to receive it in time slot n. In the first time slot thereafter, after the TCI state handover of the serving cell, apply the LP-WUS of the target TCI state of the serving cell (i.e., the TCI state indicated by the MAC CE) if it exists. If the LP-WUS MO starts in time slot n+T HARQ +X or n+T HARQ Before the +X time slot, the terminal should be able to receive the old TCI state LP-WUS (if it exists) in the LP-WUS MO.

[0203] Optionally, the UE does not need to process data from time slot n+T. HARQ The time slot for switching from +X+1 to TCI state (i.e., the time slot) The LP-WUS on the overlapping LP-WUS MOs exists in the time slots. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE starts a relevant timer (e.g., drx-onDurationTimer) on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE determines whether to start a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection according to a second indication. For example, if the base station configures the second indication through RRC signaling, the UE starts a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection; otherwise, the UE does not need to start a relevant timer on the relevant DRX cycle.

[0204] Where T HARQ It is the time (number of time slots) between DL data transmission and acknowledgment, that is, the time between the time slot of the PDSCH where the MAC CE is located sent by the base station and the time slot of the PUCCH that the UE needs to transmit. The PUCCH is used to transmit HARQ-ACK information for the PDSCH where the MAC CE is located.

[0205] -T first-SSB It is the time when the base station sends the first SSB after the MACCE command is decoded by the terminal. This SSB should be QCL-TypeA or QCL-TypeC of the target TCI state.

[0206] -T SSB-proc =2ms;

[0207] - If the target TCI state is not in the list of active TCI states in PDSCH, then TO k =1, otherwise 0.

[0208] NR-slot-length is the slot length in NR, used to transfer TO. k *(T first-SSB +T SSB-proc The number of milliseconds is converted to the number of time slots, which is numerically equal to

[0209] If the target TCI state is unknown, the UE should be able to receive a PDSCH with MAC CE indicating the TCI state in time slot n. In the first time slot thereafter, after a TCI state handover, the LP-WUS of the target TCI state (i.e., the TCI state indicated by the MAC CE) of the serving cell is applied (if it exists). If the LP-WUS MO starts in the time slot... Or Before the time slot, the terminal should be able to receive the old TCI state LP-WUS (if it exists) in the LP-WUS MO.

[0210] Optionally, the UE does not need to process data from time slot n+T. HARQ The time slot for switching from +X+1 to TCI state (i.e., the time slot) The LP-WUS on the overlapping LP-WUS MOs exists in the time slots. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE starts a relevant timer (e.g., drx-onDurationTimer) on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE determines whether to start a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection according to a second indication. For example, if the base station configures the second indication through RRC signaling, the UE starts a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection; otherwise, the UE does not need to start a relevant timer on the relevant DRX cycle.

[0211] here,

[0212] -For the FR1 band, T L1-RSRP =0. For the FR2 band, T L1-RSRP This refers to the time for receive beam refinement. The UE can determine the relevant refinement time based on the SSB or CSI-RS.

[0213] -For CSI-RS based L1-RSRP measurements, TO uk =1, and for L1-RSRP measurements using SSB, and without involving QCL-TypeD TCI state switching (e.g., in the FR1 band, when LP-WUS uses QCL-TypeC), TO uk =0

[0214] - For TCI state switching, only other QCL types are involved. uk =1

[0215] - When the MAC CE command indicates QCLtype C, T first-SSB It is the time when the base station sends the first SSB after the MAC CE command is decoded by the terminal. The SSB should be QCL-TypeA or QCL-TypeC of the target TCI state.

[0216] - When the TCI state transition indicated by the MACCE command involves QCL typeD, T first-SSB This refers to the time when the base station sends the first SSB after the L1-RSRP measurement; this SSB should be QCL-Type D or QCL-Type C of the target TCI state.

[0217] -T SSB-proc =2ms;

[0218] In another embodiment of this disclosure, the base station may also use RRC signaling to indicate the TCI state of LP-WUS. For example, in the signaling used to configure the TCI state of LP-WUS, only one TCI state is indicated. In this case, no MAC CE activation command is required, and the UE can determine the QCL parameters used for LP-WUS detection based on the TCI state parameters in the RRC signaling. The base station can update the TCI state parameters of LP-WUS through RRC signaling such as reconfiguration.

[0219] Optionally, if the target TCI state is known, the terminal should be able to, on the serving cell, in time slot n+(T) RRC_processing +Tok*(T first-SSB +T SSB-proc In the first slot after NR-slot-length, after the TCI state switch, LP-WUS is detected on the LP-WUS MO of the target TCI state (if it exists). The terminal does not need to detect LP-WUS (after RRC signaling) until the handover time ends, that is, the UE is no longer in time slot n to time slot n+(T). RRC_processing +Tok*(T first-SSB +T SSB-proc LP-WUS is detected on LP-WUS MOs with overlapping NR-slot-lengths. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE starts a relevant timer (e.g., drx-onDurationTimer) on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE also determines, according to a second indication, whether to start a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. For example, if the base station configures the second indication via RRC signaling, the UE starts a relevant timer on the DRX cycle associated with the LP-WUS MOs to perform PDCCH detection; otherwise, the UE does not need to start a relevant timer on the relevant DRX cycle.

[0220] in

[0221] - Slot n is the last slot of the PDSCH carrying the RRC activation command.

[0222] -T RRC_processing The delay for RRC processing varies depending on the type of RRC signaling. A specific example of the delays required for various types of RRC signaling / procedures is provided in Section 12 of TS38.331-i40.

[0223] -T first-SSB It is the time when the base station sends the first SSB after the MAC CE command is decoded by the terminal. The SSB should be QCL-TypeA or QCL-TypeC of the target TCI state.

[0224] -T SSB-proc =2ms;

[0225] - If the target TCI state is not in the list of active TCI states in PDSCH, then TO k =1, otherwise 0.

[0226] NR-slot-length is the slot length in NR, used to divide (T) RRC_processing +Tok*(T first-SSB +T SSB- proc The number of milliseconds in the time slots is converted to the number of time slots, which is numerically equal to...

[0227] Optionally, if the target TCI state is unknown, the UE should be able to [operate on] the serving cell in time slot n+(T). RRC_processing +T L1-RSRP +TO uk *(T first-SSB +T SSB-proc In the first slot after )) / NR-slot-length, after the TCI state handover, LP-WUS is detected on the LP-WUS MO of the target TCI state. The UE does not need to receive LP-WUS until the end of the handover period, that is, the UE is no longer in time slot n to time slot n+(T RRC_processing +T L1- RSRP +TO uk *(T first-SSB +T SSB-procLP-WUS is detected on LP-WUS MOs with overlapping NR-slot-lengths. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE starts a relevant timer (e.g., drx-onDurationTimer) on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE also determines, according to a second indication, whether to start a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. For example, if the base station configures the second indication through RRC signaling, the UE starts a relevant timer on the DRX cycle associated with the LP-WUS MOs to perform PDCCH detection; otherwise, the UE does not need to start a relevant timer on the relevant DRX cycle.

[0228] - Slot n is the last slot of the PDSCH carrying the RRC activation command.

[0229] -T RRC_processing The delay for RRC processing varies depending on the type of RRC signaling. A specific example of the delays required for various types of RRC signaling / procedures is provided in Section 12 of TS38.331-i40.

[0230] -For the FR1 band, T L1-RSRP =0. For the FR2 band, T L1-RSRP This refers to the time for receive beam refinement. The UE can determine the relevant refinement time based on the SSB or CSI-RS.

[0231] -For CSI-RS based L1-RSRP measurements, TO uk =1, and for L1-RSRP measurements using SSB, and without involving QCL-TypeD TCI state switching (e.g., in the FR1 band, when LP-WUS uses QCL-TypeC), TO uk =0

[0232] - For TCI state switching, only other QCL types are involved. uk =1

[0233] - When the MACCE command indicates QCL type C, T first-SSB It is the time when the base station sends the first SSB after the MAC CE command is decoded by the terminal. The SSB should be QCL-TypeA or QCL-TypeC of the target TCI state.

[0234] - When the TCI state transition indicated by the MACCE command involves QCL typeD, T first-SSB This refers to the time when the base station sends the first SSB after the L1-RSRP measurement; this SSB should be QCL-Type D or QCL-Type C of the target TCI state.

[0235] -T SSB-proc =2ms.

[0236] In another embodiment of this disclosure, the base station may also configure LP-WUS to be associated with CORESET / PDCCH. If the base station has not configured a TCI state for the associated CORESET / PDCCH or has only configured one TCI state, the base station can update the TCI state parameters of the CORESET / PDCCH through RRC signaling such as reconfiguration. The UE determines the TCI state or QCL source used by LP-WUS based on the TCI state used by the associated CORESET / PDCCH.

[0237] Optionally, if the target TCI state is known, the terminal should be able to [operate on] the serving cell in time slot n+(T). RRC_processing +Tok*(T first-SSB +T SSB-proc In the first slot after NR-slot-length, after the TCI state switch, the LP-WUS (if present) is detected / received on the LP-WUS MO of the target TCI state. The terminal does not need to detect LP-WUS (after RRC signaling) until the handover time ends. That is, the UE is not in time slot n to time slot n+(T) RRC_processing +T Ok *(T first-SSB +T SSB-proc LP-WUS is detected on LP-WUS MOs with overlapping NR-slot-lengths. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE starts a relevant timer (e.g., drx-onDurationTimer) on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE also determines, according to a second indication, whether to start a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. For example, if the base station configures the second indication via RRC signaling, the UE starts a relevant timer on the DRX cycle associated with the LP-WUS MOs to perform PDCCH detection; otherwise, the UE does not need to start a relevant timer on the relevant DRX cycle.

[0238] in

[0239] - Slot n is the last slot of the PDSCH carrying this RRC signaling.

[0240] -T RRC_processing The processing delay for RRC varies depending on the type of RRC signaling. A specific example is the delay required for various RRC signaling / procedures as described in Section 12 of TS38.331-i40.

[0241] -T first-SSB This is the time when the base station sends the first SSB after the RRC signaling is processed by the terminal. The SSB should be QCL-Type A or QCL-Type C of the target TCI state.

[0242] -T SSB-proc =2ms;

[0243] - If the target TCI state is not in the list of active TCI states in PDSCH, then TO k =1, otherwise 0.

[0244] NR-slot-length is the slot length in NR, used to divide (T) RRC_processing +Tok*(T first-SSB +T SSB- proc The number of milliseconds in the time slots is converted to the number of time slots, which is numerically equal to...

[0245] Optionally, if the target TCI state is unknown, the UE should be able to [operate on] the serving cell in time slot n+(T). RRC_processing +T L1-RSRP +TO uk *(T first-SSB +T SSB-proc In the first slot after )) / NR-slot-length, after the TCI state handover, LP-WUS is detected on the LP-WUS MO of the target TCI state (if it exists). The UE does not need to receive LP-WUS until the end of the handover period, that is, the UE is no longer in time slot n to time slot n+(T). RRC_processing +T L1-RSRP +TO uk *(T first-SSB +T SSB-procLP-WUS is detected on LP-WUS MOs with overlapping NR-slot-lengths. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE starts a relevant timer (e.g., drx-onDurationTimer) on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. Optionally, if the UE uses LP-WUS mode 1 to detect LP-WUS, the UE also determines, according to a second indication, whether to start a relevant timer on the DRX cycle associated with the overlapping LP-WUS MOs to perform PDCCH detection. For example, if the base station configures the second indication via RRC signaling, the UE starts a relevant timer on the DRX cycle associated with the LP-WUS MOs to perform PDCCH detection; otherwise, the UE does not need to start a relevant timer on the relevant DRX cycle.

[0246] - Slot n is the last slot of the PDSCH carrying the RRC activation command.

[0247] -T RRC_processing The delay for RRC processing varies depending on the type of RRC signaling. A specific example of the delays required for various types of RRC signaling / procedures is provided in Section 12 of TS38.331-i40.

[0248] -For the FR1 band, T L1-RSRP =0. For the FR2 band, T L1-RSRP This refers to the time for receive beam refinement. The UE can determine the relevant refinement time based on the SSB or CSI-RS.

[0249] -For CSI-RS based L1-RSRP measurements, TO uk =1, and for L1-RSRP measurements using SSB, and without involving QCL-TypeD TCI state switching (e.g., in the FR1 band, when LP-WUS uses QCL-TypeC), TO uk =0

[0250] - For TCI state switching, only other QCL types are involved. uk =1

[0251] - When the RRC signaling indicates QCL type C, T first-SSB This is the time after the RRC processing time when the base station sends the first SSB, which should be QCL-Type A or QCL-Type C of the target TCI state;

[0252] - When the TCI state switch indicated by the RRC signaling involves QCL type D, Tfirst-SSB This refers to the time when the base station sends the first SSB after the L1-RSRP measurement; this SSB should be QCL-Type D or QCL-Type C of the target TCI state.

[0253] -T SSB-proc =2ms.

[0254] In another aspect of this disclosure, the UE can determine the location of the LP-WUS MO based on the configuration parameters of the LP-WUS resource and the relevant DRX parameters.

[0255] Optionally, the UE determines the start point of LP-WUS MO in the time slot. and frame n f and satisfy

[0256] Among them, T lpwus The period of LP-WUS is expressed in timeslots, T. offset Let be the offset, and we have:

[0257] drx-LongCycle is the long DRX cycle period in the DRX parameters. drx-StartOffset is the delay parameter for starting drx-onDurationTimer in the DRX parameters.

[0258] D is an integer configured for the base station, used to determine the period of LP-WUS.

[0259] Optionally, the UE determines the start point of LP-WUS MO in the time slot. and frame n f If a long DRX loop is applied and a non-integer offset (drx-NonIntegerLongCycleStartOffset) is not configured,

[0260] in,

[0261] T offset =slotoffset_lp-wus-timer

[0262] offset = drx - StartOffset

[0263] drx-LongCycle is the long DRX cycle period in the DRX parameters. drx-StartOffset is the delay parameter for starting drx-onDurationTimer in the DRX parameters.

[0264] D is an integer configured for the base station, used to determine the period of LP-WUS.

[0265] Optionally, if the UE applies a Long DRX cycle as a DRX group and configures a non-integer offset drx-NonIntegerLongCycleStartOffset drx-NonIntegerLongCycleStartOffset, the UE determines the start point of the LP-WUS MO in the time slot. and frame n f ,

[0266] in,

[0267] T offset =slotoffset_lp-wus-timer

[0268] offset=drx-NonIntegerLongCycleStartOffset

[0269] `drx-LongCycle` is the long DRX cycle period in the DRX parameters. `drx-NonIntegerLongCycleStartOffset` is the non-integer (milliseconds) delay parameter in the DRX parameters for starting `drx-onDurationTimer`.

[0270] D is an integer configured for the base station, used to determine the period of LP-WUS.

[0271] The following description uses FIG4 to illustrate a user equipment that can perform the methods described in detail above in this disclosure as an embodiment.

[0272] Figure 4 is a schematic block diagram illustrating the user equipment (UE) involved in this disclosure.

[0273] As shown in Figure 4, the user equipment UE400 includes a processor 401 and a memory 402. The processor 401 may include, for example, a microprocessor, a microcontroller, an embedded processor, etc. The memory 402 may include, for example, volatile memory (such as random access memory, RAM), a hard disk drive (HDD), non-volatile memory (such as flash memory), or other memory. Program instructions are stored on the memory 402. When executed by the processor 401, these instructions can perform the methods described in detail herein, executed by the user equipment.

[0274] The methods and related devices of this disclosure have been described above in conjunction with preferred embodiments. Those skilled in the art will understand that the methods shown above are merely exemplary, and the various embodiments described above can be combined with each other without contradiction. Furthermore, to avoid repetition, some steps or methods already described in one embodiment may not be repeated in the description of other aspects or embodiments if they may be reused in other aspects or embodiments, in order to avoid excessive redundancy. Those skilled in the art can combine related steps and methods. In addition, the methods of this disclosure are not limited to the steps and order shown above. The network nodes and user equipment shown above may include more modules, such as modules that can be developed or will be developed in the future for use with base stations, MMEs, or UEs, etc. The various identifiers shown above are merely exemplary and not restrictive, and this disclosure is not limited to the specific information elements exemplified by these identifiers. Those skilled in the art can make many variations and modifications based on the teachings of the illustrated embodiments. For example, in this disclosure, "1" and "0" are used to represent related indications or information, and they can be interchanged without contradiction. That is, "0" is used to indicate information indicated by "1" in this disclosure, and "1" is used to indicate information indicated by "0" in this disclosure. As another example, in the examples of this disclosure, some sequence numbers are arranged in ascending order to correspond to bits from MSB to LSB. Without contradiction, they could also be arranged in descending order to correspond to bits from MSB to LSB. Furthermore, unless otherwise specified, the sequence numbers in the examples of this disclosure are counted incrementally starting from 0. Sequence number 0 can correspond to the first element of the sequence, sequence number 0 can correspond to the second element of the sequence, and so on. These variations do not affect the process by which the UE determines the related information based on the related indication.

[0275] It should be understood that the above embodiments of this disclosure can be implemented by software, hardware, or a combination of both. For example, the various components inside the base station and user equipment in the above embodiments can be implemented by a variety of devices, including but not limited to: analog circuit devices, digital circuit devices, digital signal processing (DSP) circuits, programmable processors, application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), programmable logic devices (CPLDs), and so on.

[0276] In this disclosure, "base station" can refer to a mobile communication data and control switching center with high transmission power and wide coverage, including functions such as resource allocation and scheduling, and data reception and transmission. "User equipment" can refer to user mobile user equipment, such as mobile phones, laptops, and other user equipment that can wirelessly communicate with base stations or micro base stations.

[0277] Furthermore, the embodiments of this disclosure disclosed herein can be implemented on a computer program product. More specifically, the computer program product is one that has a computer-readable medium on which computer program logic is encoded, which, when executed on a computing device, provides related operations to implement the above-described technical solutions of this disclosure. When executed on at least one processor of a computing system, the computer program logic causes the processor to perform the operations (methods) described in the embodiments of this disclosure. This configuration of the disclosure is typically provided as software, code, and / or other data structures set or encoded on a computer-readable medium such as an optical medium (e.g., CD-ROM), floppy disk, or hard disk, or other media such as firmware or microcode on one or more ROM, RAM, or PROM chips, or downloadable software images, shared databases, etc., in one or more modules. The software or firmware or such configuration can be installed on a computing device to cause one or more processors in the computing device to perform the technical solutions described in the embodiments of this disclosure.

[0278] Furthermore, each functional module or feature of the base station equipment and user equipment used in each of the above embodiments can be implemented or executed by circuitry, which is typically one or more integrated circuits. Circuitry designed to perform the various functions described in this specification may include general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs) or general-purpose integrated circuits, field-programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic, or discrete hardware components, or any combination of the above devices. The general-purpose processor may be a microprocessor, or the processor may be an existing processor, controller, microcontroller, or state machine. The aforementioned general-purpose processor or each circuit may be configured by digital circuitry or by logic circuitry. Furthermore, when advancements in semiconductor technology lead to advanced technologies that can replace current integrated circuits, this disclosure may also utilize integrated circuits obtained using such advanced technologies.

[0279] Although the present disclosure has been illustrated above in conjunction with preferred embodiments, those skilled in the art will understand that various modifications, substitutions, and changes can be made to the disclosure without departing from its spirit and scope. Therefore, the disclosure should not be limited by the above embodiments, but rather by the appended claims and their equivalents.

Claims

1. A method executed by a user equipment (UE), comprising: The TCI status parameters used by LP-WUS are received via MAC CE or RRC signaling, which indicates the TCI status for the transmission configuration of the low-power wake-up signal LP-WUS. as well as Activate the TCI state associated with the TCI state parameter in the serving cell, and detect the LP-WUS on the LP-WUS detection opportunity, i.e., the LP-WUS MO. The interval between the LP-WUS MO and the PDSCH that transmits the MAC CE or RRC signaling is not less than the specified number of time slots.

2. The method according to claim 1, further comprising: When time slot T is set to time slot k+X, where time slot k is a PUCCH time slot used to transmit HARQ-ACK information for the PDSCH, and the number of time slots X is the difference between the specified number of time slots and the time slot interval between the time slot for transmitting the PDSCH and time slot k, The TCI state is activated in the first time slot after time slot T, i.e., time slot T+1, if at least one of the following conditions is met: - The LP-WUS MO starts from time slot T+1 or after time slot T+1; - The LP-WUS MO does not overlap with time slot T+1; and -Time slot T+1 is the activity time.

3. The method according to claim 1, further comprising: When time slot T is set to time slot k+X, where time slot k is a PUCCH time slot used to transmit HARQ-ACK information for the PDSCH, and the number of time slots X is the difference between the specified number of time slots and the time slot interval between the time slot for transmitting the PDSCH and time slot k, The TCI state is activated in the next time slot of the later of the last time slot of the LP-WUS MO and the time slot T if at least one of the following conditions is met: - The LP-WUS MO begins in time slot T or begins before time slot T; and - The LP-WUS MO overlaps with the time slot T.

4. The method according to claim 1, further comprising: When the target TCI state is known, the LP-WUS of the serving cell is detected starting from the second time slot where the TCI state handover occurs. as well as When the target TCI state is unknown, the LP-WUS of the serving cell is detected starting from the third time slot, which is different from the second time slot, where the TCI state handover occurs.

5. A method performed by a user equipment (UE), comprising: The TCI status parameters of the CORESET associated with the low-power wake-up signal LP-WUS are received by MAC CE or RRC signaling, which indicates the TCI status by the transmission configuration used to indicate the UE-specific PDCCH. Activate the TCI state associated with the TCI state parameter in the serving cell, and detect the LP-WUS on the LP-WUS detection opportunity, i.e., the LP-WUS MO. The interval between the LP-WUS MO and the PDSCH that transmits the MAC CE or RRC signaling is not less than the specified number of time slots X.

6. The method according to claim 5, further comprising: When detecting LP-WUS, use the same TCI state or quasi-co-located QCL source as the CORESET / PDCCH associated with LP-WUS. When time slot T is set to time slot k+X, where time slot k is a PUCCH time slot used to transmit HARQ-ACK information for the PDSCH, and the number of time slots X is the difference between the specified number of time slots and the time slot interval between the time slot for transmitting the PDSCH and time slot k, The TCI state is activated in the first time slot after time slot T, i.e., time slot T+1, if at least one of the following conditions is met: - The LP-WUS MO starts from time slot T+1 or after time slot T+1; - The LP-WUS MO does not overlap with time slot T+1; and -Time slot T+1 is the activity time.

7. The method according to claim 5, further comprising: When the UE detects LP-WUS, it uses the same TCI state or QCL source as the CORESET / PDCCH associated with LP-WUS. When time slot T is set to time slot k+X, where time slot k is a PUCCH time slot used to transmit HARQ-ACK information for the PDSCH, and the number of time slots X is the difference between the specified number of time slots and the time slot interval between the time slot for transmitting the PDSCH and time slot k, The TCI state is activated in the next time slot of the later of the last time slot of the LP-WUS MO and the time slot T if at least one of the following conditions is met: - The LP-WUS MO begins in time slot T or begins before time slot T; and - The LP-WUS MO overlaps with the time slot T.

8. A user equipment, comprising: processor; as well as Memory, which stores instructions The instructions, when executed by the processor, perform the method described in any one of claims 1 to 7.

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