Wake-up behavior indication for power saving

Abstract

Provided are wireless communication devices, systems, and methods related to processing wake-up behavior during discontinuous reception (DRX) operation to save power. For example, a method of wireless communication may include: receiving a default wake-up configuration associated with discontinuous reception (DRX) operation; during a wake-up signal (WUS) opportunity, monitoring the WUS; determining whether the WUS is received during the WUS opportunity; and performing physical downlink control channel (PDCCH) monitoring based on the default wake-up configuration and whether the WUS is received during the WUS opportunity.

Description

[0001] Cross-references to related applications and priority claims

[0002] This application claims priority to and the benefit of U.S. Patent Application No. 16 / 947,715, filed on August 13, 2020, and U.S. Provisional Patent Application No. 62 / 888,352, filed on August 16, 2019, which are hereby incorporated by reference in their entireties as if fully set forth below and for all applicable purposes. Technical Field

[0003] The present application relates to wireless communication systems, and more particularly to methods (and associated devices and systems) for handling wake-up behavior to save power including during discontinuous reception (DRX) operation. Background Art

[0004] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, broadcast, etc. These systems may be capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). A wireless multiple-access communication system may include multiple base stations (BSs), each of which simultaneously supports communication for multiple communication devices, which may be referred to as user equipment (UE).

[0005] Due to the power requirements of wireless communication devices associated with voice, video, packet data, messaging, broadcasting and other communications, it is desirable to limit the use of device components and save power when possible. DRX is a technology in which a UE can enter a sleep mode for a certain period of time and enter a wake-up mode for another period of time. The sleep mode allows the UE to turn off certain radio components or at least switch certain radio components to a power state lower than the active state. Therefore, the use of DRX can provide power saving at the UE. Similarly, discontinuous transmission (DTX) is a technology that can be used by the UE to avoid sending signals in certain situations. When the UE uses DTX to avoid sending signals, the UE can turn off certain radio components, switch certain radio components to a power state lower than the active state, or otherwise reduce the power requirements of the UE. Similarly, DRX and / or DTX techniques can be applied to the BS to save power and / or other system resources. In addition, by using DTX to avoid sending signals, the network traffic and the possibility of interference can be reduced. For UEs and / or BSs operating in DRX and DTX modes, it is necessary to ensure that the device communicates in a manner that provides the user with the expected level of communication latency and throughput, while also providing power saving and extending battery life. Summary of the invention

[0006] The following summarizes some aspects of the present disclosure to provide a basic understanding of the technology discussed. This summary is not a broad overview of all expected features of the present disclosure, and is neither intended to identify the key or key elements of all aspects of the present disclosure, nor is it intended to describe the scope of any or all aspects of the present disclosure. Its sole purpose is to present some concepts of one or more aspects of the present disclosure in summary form as a preface to a more detailed description presented later.

[0007] Various aspects of the present disclosure provide solutions for how a user equipment (UE) should perform wake-up when a wake-up signal (WUS) is not received from a base station (BS), while maintaining the power saving benefits associated with discontinuous reception (DRX) and discontinuous transmission (DTX) operations. In some cases, when a WUS is not received from a BS during a WUS opportunity, the UE uses a default wake-up configuration. In this regard, the default wake-up configuration may cause the UE to skip PDCCH monitoring (e.g., remain in sleep mode) during an on-duration associated with the WUS opportunity. Alternatively, the default wake-up configuration may cause the UE to actively perform PDCCH monitoring during an on-duration associated with the WUS opportunity. The default wake-up configuration may be dynamically and / or semi-statically configured to select whether the UE should skip or actively perform PDCCH monitoring during an on-duration associated with the WUS opportunity.

[0008] In one aspect of the present disclosure, a wireless communication method includes: receiving, by a user equipment (UE) a default wake-up configuration associated with a discontinuous reception (DRX) operation from a base station (BS); monitoring, by the UE, a wake-up signal (WUS) from the BS during a WUS opportunity; determining, by the UE, whether the WUS is received from the BS during the WUS opportunity; and performing, by the UE, physical downlink control channel (PDCCH) monitoring based on the default wake-up configuration and whether the WUS is received from the BS during the WUS opportunity.

[0009] In another aspect of the present disclosure, a wireless communication method includes: sending a default wake-up configuration associated with discontinuous reception (DRX) operation to a user equipment (UE) by a base station (BS); determining by the BS whether to send a wake-up signal (WUS) to the UE during a WUS opportunity based on traffic load; and sending a physical downlink control channel (PDCCH) signal by the BS during a duration associated with the WUS opportunity.

[0010] In another aspect of the present disclosure, a user equipment (UE) includes: a transceiver configured to: receive a default wake-up configuration associated with a discontinuous reception (DRX) operation from a base station (BS); and during a wake-up signal (WUS) opportunity, monitor a WUS from the BS; and a processor communicating with the transceiver, configured to: determine whether a WUS is received from the BS during the WUS opportunity; and perform physical downlink control channel (PDCCH) monitoring based on the default wake-up configuration and whether the WUS is received from the BS during the WUS opportunity.

[0011] In another aspect of the present disclosure, a base station includes: a transceiver configured to: send a default wake-up configuration associated with discontinuous reception (DRX) operation to a user equipment (UE) and send a physical downlink control channel (PDCCH) signal during a duration associated with a wake-up signal (WUS) opportunity; and a processor communicating with the transceiver, configured to: determine whether to send a WUS to the UE during the WUS opportunity based on traffic load.

[0012] In another aspect of the present disclosure, a non-transitory computer-readable medium having program code recorded thereon includes code for causing a user equipment (UE) to receive a default wake-up configuration associated with a discontinuous reception (DRX) operation from a base station (BS); code for causing the UE to monitor a wake-up signal (WUS) from the BS during a WUS opportunity; code for causing the UE to determine whether a WUS is received from the BS during a WUS opportunity; and code for causing the UE to perform physical downlink control channel (PDCCH) monitoring based on the default wake-up configuration and whether a WUS is received from the BS during the WUS opportunity.

[0013] In another aspect of the present disclosure, a non-transitory computer-readable medium having program code recorded thereon includes code for causing a base station (BS) to send a default wake-up configuration associated with discontinuous reception (DRX) operation to a user equipment (UE); code for causing the BS to determine whether to send a wake-up signal (WUS) to the UE during a WUS opportunity based on traffic load; and code for causing the BS to send a physical downlink control channel (PDCCH) signal during a duration associated with the WUS opportunity.

[0014] After reading the following description of specific exemplary embodiments of the present invention in conjunction with the accompanying drawings, other aspects, features and advantages of the present invention will become apparent to those of ordinary skill in the art. Although features of the present invention may be discussed below with respect to certain examples and drawings, all embodiments of the present invention may include one or more of the advantageous features discussed herein. In other words, although one or more embodiments may be discussed as having certain advantageous features, one or more of these features may also be used according to various other embodiments of the present invention discussed herein. In a similar manner, although exemplary embodiments may be discussed below as device, system or method embodiments, it should be understood that these exemplary embodiments may be implemented in various devices, systems and methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A wireless communication network according to some aspects of the present disclosure is shown.

[0016] Figure 2 A scheduling / transmission configuration of a wireless communication method according to some aspects of the present disclosure is shown.

[0017] Figure 3 A message structure of a wireless communication method according to some aspects of the present disclosure is shown.

[0018] Figure 4 is a block diagram of a user equipment (UE) according to some aspects of the present disclosure.

[0019] Figure 5 is a block diagram of an exemplary base station (BS) according to aspects of the present disclosure.

[0020] Figure 6 A scheduling / transmission configuration of a wireless communication method according to some aspects of the present disclosure is shown.

[0021] Fig. 7A A scheduling / transmission configuration of a wireless communication method according to some aspects of the present disclosure is shown.

[0022] Figure 7B A scheduling / transmission configuration of a wireless communication method according to some aspects of the present disclosure is shown.

[0023] Fig. 8A A protocol diagram illustrating a wireless communication method according to some aspects of the present disclosure is shown.

[0024] Figure 8B A protocol diagram illustrating a wireless communication method according to some aspects of the present disclosure is shown.

[0025] Fig. 9 A protocol diagram illustrating a wireless communication method according to some aspects of the present disclosure is shown.

[0026] Fig.10 A protocol diagram illustrating a wireless communication method according to some aspects of the present disclosure is shown.

[0027] Fig.11 A protocol diagram illustrating a wireless communication method according to some aspects of the present disclosure is shown.

[0028] Fig.12 A flow chart of a method of wireless communication according to some aspects of the present disclosure is shown.

[0029] Fig.13 A flow chart of a method of wireless communication according to some aspects of the present disclosure is shown. DETAILED DESCRIPTION

[0030] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations, and is not intended to represent the only configuration in which the concepts described herein may be practiced. In order to provide a thorough understanding of the various concepts, the detailed description includes specific details. However, it is apparent to those skilled in the art that these concepts may be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid confusing these concepts.

[0031] The present disclosure generally relates to wireless communication systems, also referred to as wireless communication networks. In various embodiments, these techniques and devices may be used for wireless communication networks, such as code division multiple access (CDMA) networks, time division multiple access (TDMA) networks, frequency division multiple access (FDMA) networks, orthogonal FDMA (OFDMA) networks, single carrier FDMA (SC-FDMA) networks, LTE networks, global mobile communication systems (GSM) networks, fifth generation (5G) or new radio (NR) networks, and other communication networks. As described herein, the terms "network" and "system" may be used interchangeably.

[0032] OFDMA networks can implement radio technologies such as Evolved UTRA (E-UTRA), Institute of Electrical and Electronics Engineers (IEEE) 802.11, IEEE 802.16, IEEE 802.20, flash-OFDM, etc. UTRA, E-UTRA, GSM are part of Universal Mobile Telecommunications System (UMTS). In particular, Long Term Evolution (LTE) is a version of UMTS that uses E-UTRA. UTRA, E-UTRA, GSM, UMTS, and LTE are described in documents provided by an organization named "3rd Generation Partnership Project" (3GPP), and cdma2000 is described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). These different radio technologies and standards are known or under development. For example, the 3rd Generation Partnership Project (3GPP) is a collaboration between telecommunications association groups with the goal of defining globally applicable third generation (3G) mobile phone specifications. 3GPP Long Term Evolution (LTE) is a 3GPP project aimed at improving the UMTS mobile phone standard. 3GPP may define specifications for next generation mobile networks, mobile systems, and mobile devices. The present disclosure relates to the evolution of wireless technology from LTE, 4G, 5G, NR and beyond, where access to the wireless spectrum is shared between networks using a new and different set of radio access technologies or radio air interfaces.

[0033] In particular, 5G networks contemplate different deployments, different spectrums, and different services and devices that can be implemented using a unified OFDM-based air interface. To achieve these goals, in addition to developing new radio technologies for 5G NR networks, further enhancements to LTE and LTE-A are also being considered. 5G NR will (1) be able to scale to networks with ultra-high density (e.g., ~1M nodes / km) and (2) be able to scale to networks with ultra-high density (e.g., ~1M nodes / km). 2 ), ultra-low complexity (e.g., ~10s bit / s), ultra-low energy (e.g., ~10+ years battery life), and deep coverage and the ability to reach challenging locations for massive Internet of Things (IoT); (2) including mission-critical control with strong security to protect sensitive personal, financial, or confidential information, ultra-high reliability (e.g., ~99.9999% reliability), ultra-low latency (e.g., ~1ms), and users with wide mobility range or lack of mobility range; and (3) with enhanced mobile broadband, including extremely high capacity (e.g., ~10Tbps / km 2 ), extremely high data rates (e.g., multi-Gbps rates, 100+Mbps user experience rates), and deep perception with advanced discovery and optimization.

[0034] 5G NR can be implemented to use an optimized OFDM-based waveform with scalable parameter sets and transmission time intervals (TTI); have a common, flexible framework to effectively multiplex services and functions through dynamic, low-latency time division duplex (TDD) / frequency division duplex (FDD) designs; and have advanced wireless technologies such as massive multiple-input multiple-output (MIMO), robust millimeter wave (mmWave) transmission, advanced channel coding and decoding, and device-centric mobility. The scalability of the parameter set in 5G NR, along with the expansion of subcarrier spacing, can effectively address the operation of different services across different spectrums and different deployments. For example, in various outdoor and macro coverage deployments of less than 3GHz FDD / TDD implementations, a subcarrier spacing of 15kHz may appear on bandwidths (BW) such as 5, 10, 20MHz. For various other outdoor and small cell coverage deployments with TDD greater than 3GHz, a subcarrier spacing of 30kHz may appear on 80 / 100MHz BW. For various other indoor broadband implementations, using TDD on the unlicensed portion of the 5GHz band, a subcarrier spacing of 60kHz may occur at 160MHz BW. Finally, for various deployments transmitting with mmWave components at 28GHz TDD, a subcarrier spacing of 120kHz may occur at 500Mhz BW.

[0035] 5G NR's scalable parameter set technology helps achieve scalable TTI to meet different latency and quality of service (QoS) requirements. For example, shorter TTI can be used for low latency and high reliability, while longer TTI can be used for higher spectral efficiency. Efficient multiplexing of long TTI and short TTI to allow transmission to start on symbol boundaries. 5G NR also considers a self-contained integrated subframe design with uplink / downlink scheduling information, data, and acknowledgment in the same subframe. The self-contained integrated subframe supports communications in unlicensed or contention-based shared spectrum, adaptive uplink / downlink, which can be flexibly configured on a per-cell basis to dynamically switch between uplink and downlink to meet current traffic requirements.

[0036] Various other aspects and features of the present disclosure are further described below. It should be clear that the teachings herein can be embodied in various forms, and any specific structure, function, or both disclosed herein are only representative and not restrictive. Based on the teachings herein, it should be understood by those of ordinary skill in the art that the aspects disclosed herein can be implemented independently of any other aspects, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement a device or practice a method. In addition, other structures, functions, or structures and functions other than one or more aspects described herein can be used to implement such a device or practice such a method. For example, a method can be implemented as a part of a system, device, device, and / or implemented as instructions stored on a computer-readable medium for execution on a processor or computer. In addition, an aspect can include at least one element of a claim.

[0037] In a wireless communication network, DRX is a technology that allows a UE to enter a sleep mode during a certain period of time and enter an awake mode during another period of time. During the awake period, the UE can monitor the PDCCH from the serving BS and decode the PDCCH received from the BS. During the sleep period, the UE may not monitor the PDCCH. Sleep mode allows the UE to turn off certain radio components or at least switch certain radio components to a lower power state than the active state. Therefore, the use of DRX can provide power savings at the UE. Similarly, discontinuous transmission (DTX) is a technology that can be used by the BS to avoid sending signals in certain situations. When the BS uses DTX to avoid sending signals, the BS can turn off certain radio components, switch certain radio components to a lower power state than the active state, or otherwise reduce the power requirements of the BS. In addition, by using DTX to avoid sending signals, network traffic and the possibility of interference can be reduced.

[0038] The present disclosure provides methods, systems, and devices for indicating how a user equipment (UE) should perform wake-up when a wake-up signal (WUS) is not received from a base station (BS), while maintaining the power saving benefits associated with DRX and DTX operations. In some cases, when a WUS is not received from a BS during a WUS opportunity, the UE uses a default wake-up configuration. In this regard, the default wake-up configuration may cause the UE to skip PDCCH monitoring (e.g., remain in sleep mode) during an on-duration associated with a WUS opportunity. Alternatively, the default wake-up configuration may cause the UE to actively perform PDCCH monitoring during an on-duration associated with a WUS opportunity. The default wake-up configuration may be dynamically and / or semi-statically configured to select whether the UE should skip or actively perform PDCCH monitoring during an on-duration associated with a WUS opportunity.

[0039] These and other aspects of the present disclosure may provide several benefits. For example, as part of DRX operation including connected mode DRX (C-DRX), the amount of time a UE can spend in sleep mode may be increased, thereby reducing power consumption and increasing battery life. In this regard, keeping the UE in a sleep state rather than unnecessarily monitoring the PDCCH may help the UE to power off or shut down one or more components of the UE associated with receiving, decoding, and / or otherwise processing PDCCH signals. Similarly, as part of DTX operation, the amount of time a BS can avoid sending a signal may be increased, reducing power consumption of the BS, reducing network traffic, saving system resources, and reducing the likelihood of interference. Additional features and benefits of the present disclosure are set forth in the description below.

[0040] Figure 1 A wireless communication network 100 according to some embodiments of the present disclosure is shown. The network 100 may be a 5G network. The network 100 includes a plurality of base stations (BSs) 105 (labeled 105a, 105b, 105c, 105d, 105e, and 105f, respectively) and other network entities. The BS 105 may be a station that communicates with the UE 115, and may also be referred to as an evolved Node B (eNB), a next generation eNB (gNB), an access point, etc. Each BS 105 may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" may refer to this particular geographic coverage area of ​​a BS and / or BS subsystem serving that coverage area, depending on the context in which the term is used.

[0041] The BS 105 may provide communication coverage for macro cells or small cells (such as pico cells or femto cells) and / or other types of cells. A macro cell typically covers a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs through a service subscription with a network provider. A small cell, such as a pico cell, will typically cover a relatively small geographic area and may allow unrestricted access by UEs with a service subscription with a network provider. A small cell, such as a femto cell, will also typically cover a relatively small geographic area (e.g., a home) and, in addition to unrestricted access, may also provide restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs for users in a home, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a small cell may be referred to as a small cell BS, a pico BS, a femto BS, or a home BS. In Figure 1In the example shown, BS 105d and 105e may be conventional macro BSs, while BS 105a-105c may be macro BSs enabled with one of three-dimensional (3D), full-dimensional (FD), or massive MIMO. BS 105a-105c may utilize their higher-dimensional MIMO capabilities to utilize 3D beamforming in both elevation and azimuth beamforming to increase coverage and capacity. BS 105f may be a small cell BS, which may be a home node or a portable access point. BS 105 may support one or more (e.g., two, three, four, etc.) cells.

[0042] The network 100 may support synchronous or asynchronous operation. For synchronous operation, the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time. For asynchronous operation, the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.

[0043] UE 115 is dispersed throughout the wireless network 100, and each UE 115 can be stationary or mobile. UE 115 can also be referred to as a terminal, a mobile station, a subscriber unit, a station, etc. UE 115 can be a cellular phone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a tablet computer, a laptop computer, a cordless phone, a wireless local loop (WLL) station, etc. In one aspect, UE 115 can be a device including a universal integrated circuit card (UICC). On the other hand, UE can be a device that does not include a UICC. In some aspects, UE 115 that does not include a UICC can also be referred to as an IoT device or an Internet of Everything (IoE) device. UE 115a-115d is an example of a mobile smart phone type device that accesses the network 100. UE 115 can also be a machine that is specially configured for connecting communications (including machine type communications (MTC), enhanced MTC (eMTC), narrowband IoT (NB-IoT), etc.). UE 115e-115k is an example of various machines configured for communication of accessing the network 100. UE 115 may be able to communicate with any type of BS, whether macro BS, small cell, etc. Figure 1 , lightning (eg, communication link) indicates wireless transmission between UE 115 and serving BS 105, which is a BS designated to serve UE 115 on a downlink and / or uplink, or desired transmission between BSs, and backhaul transmission between BSs.

[0044] In operation, BS 105a-105c may serve UEs 115a and 115b using 3D beamforming and cooperative spatial techniques such as coordinated multipoint (CoMP) or multi-connectivity. Macro BS 105d may perform backhaul communications with BS 105a-105c and small cell BS 105f. Macro BS 105d may also transmit multicast services subscribed and received by UEs 115c and 115d. Such multicast services may include mobile TV or streaming video, or may include other services for providing community information, such as weather emergencies or alerts, such as amber alerts or gray alerts.

[0045] The BS 105 may also communicate with a core network. The core network may provide user authentication, access authorization, tracking, Internet Protocol (IP) connectivity, and other access, routing, or mobility functions. At least some of the BSs 105 (e.g., which may be examples of gNBs or access node controllers (ANCs)) may interface with the core network via a backhaul link (e.g., NG-C, NG-U, etc.) and may perform radio configuration and scheduling for communicating with the UE 115. In various examples, the BSs 105 may communicate with each other directly or indirectly (e.g., via a core network) via a backhaul link (e.g., X1, X2, etc.), which may be a wired or wireless communication link.

[0046] The network 100 may also support mission-critical communications with ultra-reliable and redundant links for mission-critical devices such as UE 115e, which may be a drone. The redundant communication links with UE 115e may include links from macro BSs 105d and 105e, and a link from small cell BS 105f. Other machine-type devices such as UE 115f (e.g., a thermometer), UE 115g (e.g., a smart meter), and UE 115h (e.g., a wearable device) may communicate directly with BSs such as small cell BS 105f and macro BS 105e through the network 100, or communicate in a multi-hop configuration by communicating with another user device that relays its information to the network, such as UE 115f transmitting temperature measurement information to the smart meter, UE 115g then reporting the temperature measurement information to the network through the small cell BS 105f. The network 100 may also provide additional network efficiency through dynamic, low latency TDD / FDD communications, such as in vehicle-to-vehicle (V2V).

[0047] In some implementations, the network 100 communicates using an OFDM-based waveform. An OFDM-based system may divide the system BW into multiple (K) orthogonal subcarriers, which are also commonly referred to as subcarriers, tones, bins, etc. Each subcarrier may be modulated with data. In some cases, the subcarrier spacing between adjacent subcarriers may be fixed, and the total number of subcarriers (K) may depend on the system BW. The system BW may also be divided into subbands. In other cases, the subcarrier spacing and / or duration of a TTI may be scalable.

[0048] In an embodiment, BS 105 may allocate or schedule transmission resources (e.g., in the form of time-frequency resource blocks (RBs)) for downlink (DL) and uplink (UL) transmissions in network 100. DL refers to the transmission direction from BS 105 to UE 115, while UL refers to the transmission direction from UE 115 to BS 105. Communication may be in the form of radio frames. A radio frame may be divided into a plurality of subframes or time slots, such as approximately 10 subframes or time slots. Each time slot may be further divided into small time slots. In FDD mode, UL and DL transmissions may be performed simultaneously in different frequency bands. For example, each subframe includes a UL subframe in a UL frequency band and a DL subframe in a DL frequency band. In TDD mode, UL and DL transmissions occur in different time periods using the same frequency band. For example, a subset of subframes (e.g., DL subframes) in a radio frame may be used for DL ​​transmissions, while another subset of subframes (e.g., UL subframes) in a radio frame may be used for UL transmissions.

[0049] DL subframes and UL subframes can be further divided into several areas. For example, each DL or UL subframe can have a predefined area for transmitting reference signals, control information and data. Reference signals are predetermined signals that facilitate communication between BS 105 and UE 115. For example, reference signals can have a specific pilot pattern or structure, where pilot tones can span operating BW or frequency bands, each located at a predefined time and predefined frequency. For example, BS 105 can send a cell-specific reference signal (CRS) and / or a channel state information reference signal (CSI-RS) to enable UE 115 to estimate the DL channel. Similarly, UE 115 can send a sounding reference signal (SRS) to enable BS 105 to estimate the UL channel. Control information may include resource allocation and protocol control. Data may include protocol data and / or operational data. In some embodiments, BS 105 and UE 115 may communicate using self-contained subframes. Self-contained subframes may include a portion for DL ​​communication and a portion for UL communication. Self-contained subframes may be centered on DL or centered on UL. A DL-centric subframe may include a duration for DL ​​communication that is longer than a duration for UL communication. A UL-centric subframe may include a duration for UL communication that is longer than a duration for UL communication.

[0050] In an embodiment, the network 100 may be an NR network deployed on a licensed spectrum. The BS 105 may send synchronization signals (e.g., including a primary synchronization signal (PSS) and a secondary synchronization signal (SSS)) in the network 100 to facilitate synchronization. The BS 105 may broadcast system information associated with the network 100 (e.g., including a master information block (MIB), residual system information (RMSI), and other system information (OSI)) to facilitate initial network access. In some instances, the BS 105 may broadcast the PSS, SSS, and / or MIB in the form of a synchronization signal block (SSB) on a physical broadcast channel (PBCH), and may broadcast the RMSI and / or OSI on a physical downlink shared channel (PDSCH).

[0051] In an embodiment, a UE 115 attempting to access the network 100 may perform an initial cell search by detecting the PSS from the BS 105. The PSS may enable synchronization of period timing and may indicate a physical layer identification value. The UE 115 may then receive the SSS. The SSS may enable radio frame synchronization and may provide a cell identification value that may be combined with the physical layer identification value to identify the cell. The PSS and SSS may be located in the center portion of the carrier or in any suitable frequency within the carrier.

[0052] After receiving the PSS and SSS, the UE 115 may receive the MIB. The MIB may include system information for initial network access and scheduling information for RMSI and / or OSI. After decoding the MIB, the UE 115 may receive the RMSI and / or OSI. The RMSI and / or OSI may include radio resource control (RRC) information related to random access channel (RACH) procedures, paging, control resource sets (CORESET) for physical downlink control channel (PDCCH) monitoring, physical uplink control channel (PUCCH), physical uplink shared channel (PUSCH), power control, and SRS.

[0053] After obtaining the MIB, RMSI and / or OSI, the UE 115 may perform a random access procedure to establish a connection with the BS 105. In some examples, the random access procedure may be a four-step random access procedure. For example, the UE 115 may send a random access preamble, and the BS 105 may respond with a random access response. The random access response (RAR) may include a detected random access preamble identifier (ID), timing advance (TA) information, UL authorization, a temporary cell radio network temporary identifier (C-RNTI), and / or a backoff indicator corresponding to the random access preamble. Upon receiving the random access response, the UE 115 may send a connection request to the BS 105, and the BS 105 may respond with a connection response. The connection response may indicate a contention resolution method. In some examples, the random access preamble, the RAR, the connection request, and the connection response may be referred to as message 1 (MSG 1), message 2 (MSG 2), message 3 (MSG 3), and message 4 (MSG 4), respectively. In some examples, the random access procedure may be a two-step random access procedure, in which the UE 115 may send a random access preamble and a connection request in a single transmission, and the BS 105 may respond by sending a random access response and a connection response in a single transmission. The combined random access preamble and connection request in the two-step random access procedure may be referred to as message A (MSG A). The combined random access response and connection response in the two-step random access procedure may be referred to as message B (MSG B).

[0054] After establishing the connection, the UE 115 may initiate an initial network connection process with the network 100. When the UE 115 has no active data communication with the BS 105 after the network connection, the UE 115 may return to an idle state (e.g., an RRC idle mode). Alternatively, the UE 115 and the BS 105 may enter an operational state or an active state, in which operational data may be exchanged (e.g., an RRC connected mode). For example, the BS 105 may schedule the UE 115 for UL and / or DL ​​communication. The BS 105 may send an UL and / or DL ​​scheduling grant to the UE 115 via the PDCCH. The BS 105 may send a DL communication signal to the UE 115 via the PDSCH according to the DL scheduling grant. The UE 115 may send an UL communication signal to the BS 105 via the PUSCH and / or PUCCH according to the UL scheduling grant. In some embodiments, the BS 105 and the UE 115 may use a hybrid automatic request (HARQ) technique for communication to improve reliability. In addition, the UE 115 and / or BS 105 can utilize DRX (e.g., during RRC idle mode), including connected mode DRX (C-DRX) (e.g., during RRC connected mode), and / or DTX operating modes, as discussed in more detail below.

[0055] In an embodiment, the network 100 may operate on a system BW or a component carrier (CC) BW. The network 100 may divide the system BW into multiple BWPs (e.g., parts). The BS 105 may dynamically assign the UE 115 to operate on a specific BWP (e.g., a specific part of the system BW). The assigned BWP may be referred to as an active BWP. The UE 115 may monitor the active BWP to obtain signaling information from the BS 105. The BS 105 may schedule the UE 115 for UL or DL ​​communication in the active BWP. In some instances, the BS 105 may assign a BWP pair within a CC to the UE 115 for UL and DL communication. For example, the BWP pair may include a BWP for UL communication and a BWP for DL ​​communication. In some instances, the BS 105 may dynamically switch the UE 115 from one BWP to another BWP, for example, switching from a broadband BWP to a narrowband BWP to save power, or switching from a narrowband BWP to a broadband BWP for communication.

[0056] The BS 105 may additionally configure the UE 115 with one or more CORESETs in the BWP. A CORESET may include a set of frequency resources that spans multiple symbols in time. The BS 105 may configure the UE 115 with one or more search spaces for PDCCH monitoring based on the CORESET. The UE 115 may perform blind decoding in the search space to search for DL ​​control information from the BS. The BS 105 may configure the UE 115 with various different CORSETs and / or search spaces for different types of PDCCH monitoring (e.g., DL / UL scheduling and / or wake-up information). In one example, the BS 105 may configure the UE 115 with the BWP, CORESET, and / or PDCCH search space via RRC configuration.

[0057] In an embodiment, BS 105 may establish an RRC connection with UE 115 in a primary cell (PCeLL) (e.g., on a primary frequency carrier), and may subsequently configure UE 115 to communicate in a secondary cell (SCeLL) (e.g., on a secondary frequency carrier). In an embodiment, BS 105 may trigger UE 115 to report channel information based on a channel state information reference signal (CSI-RS) transmitted by BS 105. In some instances, the trigger may be aperiodic, which may be referred to as an aperiodic-CSI-RS (A-CSI-RS) trigger.

[0058] The network 100 can operate on a shared frequency band or an unlicensed frequency band, for example, at about 3.5 GHz, sub-6 GHz or higher frequencies in the millimeter wave band. The network 100 can divide the frequency band into multiple channels, for example, each channel occupies about 20 megahertz (MHz). The BS 105 and the UE 115 can be operated by multiple network operation entities that share resources in a shared communication medium, and a channel occupancy time (COT) in the shared medium can be obtained for communication. The COT can be non-continuous in time and can refer to the amount of time a wireless node can send a frame when it wins the competition for the wireless medium. Each COT can include multiple transmission time slots. A COT may also be referred to as a transmission opportunity (TXOP).

[0059] Figure 2 A scheduling / transmission configuration 200 of a wireless communication method according to some aspects of the present disclosure is shown. As shown in the figure, Figure 2A UE operating in a DRX mode and / or a C-DRX mode according to the present disclosure is shown. The DRX mode and / or the C-DRX mode may have a specific duty cycle having an active / on period or an inactive / sleep period. At 210, the UE is in a sleep state. At a wake-up signal (WUS) opportunity 220, a WUS 222 is sent by the BS. The UE may monitor the WUS 222 during the WUS opportunity 220. A search space set defining WUS monitoring opportunities (including the WUS opportunity 220) may be configured. The search space set may be dedicated to a wake-up search space set. In some cases, the wake-up search space set is dedicated to a specific UE group (e.g., based on BWP, operator, geographic location, priority, service, subscription, etc.). In other instances, the wake-up search space is shared between multiple UE groups. In some cases, the UE monitors the WUS based on a WUS configuration received from the network and / or BS. In this regard, the WUS configuration may indicate to the UE resources associated with WUS opportunities, WUS formats, and the like (eg, search spaces including time and frequency resources, periodicity, channels, BWPs, frequency carriers, and the like).

[0060] After the WUS opportunity 220 is an offset 230, during which the UE can return to a sleep state. The offset 230 separates the WUS opportunity 220 from the on-duration 240. The on-duration 240 is associated with the WUS opportunity 220. In the example shown, a single on-duration 240 is shown. However, it should be understood that multiple on-durations (e.g., 2, 3, 4, 5, 6, etc.) may be associated with the WUS opportunity. During the on-duration 240, the UE is active and can monitor the PDCCH or other signals from the BS and / or send UL data to the BS, as shown in the UL / DL communication block 242. At this point, in some cases, the UE performs PDCCH monitoring during the on-duration 240 based on the information received in the WUS 222. For example, the WUS 222 may instruct the UE to perform one or more of aperiodic channel state reference signal (A-CSI-RS) triggering, PDCCH monitoring reduction, bandwidth part (BWP) switching, or secondary cell (Scell) wake-up.

[0061] like Figure 2 As shown, the same process is repeated with the UE in the sleep state 250, followed by another WUS opportunity 260 where a WUS 262 is transmitted. An offset 270 separates the WUS opportunity 260 from the associated on-duration 280 where DL / UL communication 282 occurs.

[0062] Figure 3 1 shows a message structure 300 according to some aspects of the present disclosure. In some examples, the message structure 300 may be used to Figure 2WUS 222 or 262. In this regard, the message structure 300 is suitable for providing wake-up downlink control information (DCI) to a UE or a UE group. In this regard, the wake-up DCI can be provided on a per-UE basis or on a per-UE group basis. In some cases, the UEs are grouped based on BWP, carrier, geographic location, priority, service, subscription, and / or other factors. In some cases, the wake-up DCI is sent, where a cyclic redundancy check (CRC) is scrambled by an identifier associated with the UE (e.g., C-RNTI) or UE group (e.g., a power-saving radio network temporary identifier (PS-RNTI)). In this regard, UEs in the same group may be configured with a common identifier (e.g., PS-RNTI) and utilize the same search space set for the wake-up DCI.

[0063] like Figure 3 As shown, the message structure 300 includes a wake-up indicator and wake-up field information for each UE or UE group. More specifically, in the example shown, the message structure is shown as having a wake-up indicator 310 and wake-up field information 312 for UE1, a wake-up indicator 320 and wake-up field information 322 for UE2, and a wake-up indicator 330 and wake-up field information 332 for UE3. At this point, the wake-up indicators 310, 320, 330 can indicate to the associated UE or UE group whether to remain in a sleep state or enter an active state during one or more on-durations associated with the WUS opportunity for sending the wake-up DCI. For example, a value of 1 in the wake-up indicator field can indicate that the UE wakes up and monitors during the next on-duration, while a value of 0 in the wake-up indicator field can indicate that the UE should skip the next on-duration and remain in a sleep state. The wake-up field information 312, 322, 332 can indicate to the associated UE or UE group if the UE is to enter an active state (e.g., when the wake-up indicator is 1), how the UE should perform PDCCH monitoring during the associated on-duration. For example, the wake-up field information 312, 322, 332 may indicate that the UE performs one or more of aperiodic channel state reference signal (A-CSI-RS) triggering, PDCCH monitoring reduction, bandwidth part (BWP) switching, or secondary cell (Scell) wake-up. In addition, the wake-up field information 312, 322, 332 may include PDCCH monitoring parameters, such as PDCCH monitoring duration, PDCCH monitoring period, and the number of PDCCH blind decoding candidates for PDCCH monitoring during the wake-up on duration associated with the corresponding WUS. Although Figure 3The message structure 330 depicted in the figure interleaves the wake-up indicators 310, 320, 330 with the wake-up information fields 312, 322, 332 into pairs based on the UE (or UE group), but it should be understood that any suitable message structure or arrangement can be utilized, including having all wake-up indicators 310, 320, 330 before all wake-up information fields 312, 322, 332, including all wake-up information fields 312, 322, 332 before all wake-up indicators 310, 320, 330, interleaving the wake-up indicators 310, 320, 330 and the wake-up information fields 312, 322, 332 starting with a wake-up information field, etc.

[0064] Each of the wakeup indicators 310, 320, 330 and the wakeup information fields 312, 322, 332 may have any suitable bit length. In some instances, each of the wakeup indicators 310, 320, 330 may have a bit length of 1. When network traffic is low or sparse, the wakeup indicators 310, 320, 330 may have a bit value of 0 most of the time. Conversely, when network traffic is high or dense, the wakeup indicators 310, 320, 330 may have a bit value of 1 most of the time.

[0065] Figure 4 is a block diagram of an exemplary UE 400 according to aspects of the present disclosure. Figure 1 , UE 400 may be UE 115. As shown, UE 400 may include a processor 402, a memory 404, a WUS processing and control module 408, a transceiver 410 including a modem subsystem 412 and a radio frequency (RF) unit 414, and one or more antennas 416. These elements may communicate with each other directly or indirectly, for example via one or more buses.

[0066] The processor 402 may include a central processing unit (CPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a controller, a field programmable gate array (FPGA) device, another hardware device, a firmware device, or any combination thereof, configured to perform the operations described herein. The processor may also be implemented as a combination of computing devices, for example, a DSP and a microprocessor, a combination of multiple microprocessors, a combination of one or more microprocessors and a DSP core, or any other such configuration.

[0067] The memory 404 may include a cache memory (e.g., a cache memory of the processor 402), a random access memory (RAM), a magnetoresistive RAM (MRAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), flash memory, a solid-state memory device, a hard drive, other forms of volatile and non-volatile memory, or a combination of different types of memory. In an embodiment, the memory 404 includes a non-transitory computer-readable medium. The memory 404 may store instructions 406 or have instructions 406 recorded thereon. The instructions 406 may include instructions that, when executed by the processor 402, cause the processor 402 to perform the aspects of the present disclosure described herein with reference to the UE 115 (e.g., Figure 2 , 3 , 6-12 aspects). Instructions 406 may also be referred to as program code. Program code may be used to cause a wireless communication device (or a specific component of a wireless communication device) to perform these operations, such as by causing one or more processors (e.g., processor 402) to control or command the wireless communication device (or a specific component of a wireless communication device) to do so. The terms "instructions" and "code" should be interpreted broadly to include any type of computer-readable statements. For example, the terms "instructions" and "code" may refer to one or more programs, routines, subroutines, functions, processes, etc. "Instructions" and "code" may include a single computer-readable statement or many computer-readable statements.

[0068] The WUS processing and control module 408 may be implemented via hardware, software, or a combination thereof. For example, the WUS processing and control module 408 may be implemented as a processor, circuit, and / or instruction 406 stored in the memory 404 and executed by the processor 402. In some examples, the WUS processing and control module 408 may be integrated within the modem subsystem 412. For example, the WUS processing and control module 408 may be implemented by a combination of software components (e.g., executed by a DSP or general purpose processor) and hardware components (e.g., logic gates and circuits) within the modem subsystem 412.

[0069] The WUS processing and control module 408 may be used in various aspects of the present disclosure, for example, Figure 2 , 3and aspects 6-12. The WUS processing and control module 408 is configured to communicate with other components of the UE 400 to receive a default wake-up configuration associated with a discontinuous reception (DRX) operation (e.g., for an idle mode or a connected mode), monitor a WUS from the BS during a wake-up signal (WUS) opportunity, determine whether a WUS is received from the BS during a WUS opportunity, perform PDCCH monitoring; receive a WUS (including a WUS configuration) during a WUS opportunity; operate using one or more wake-up configurations, start a timer, determine whether a timer has expired, cancel a timer, determine whether a condition has occurred or is satisfied, and / or perform other functions related to the wake-up process of the UE described in the present disclosure.

[0070] As shown, the transceiver 410 may include a modem subsystem 412 and an RF unit 414. The transceiver 410 may be configured to communicate bidirectionally with other devices such as the BS 105. The modem subsystem 412 may be configured to modulate and / or encode data from the memory 404 and / or the WUS processing and control module 408 according to a modulation and coding scheme (MCS) (e.g., a low-density parity check (LDPC) coding scheme, a turbo coding scheme, a convolutional coding scheme, a digital beamforming scheme, etc.). The RF unit 414 may be configured to process (e.g., perform analog-to-digital conversion or digital-to-analog conversion, etc.) the modulated / coded data (e.g., UL control information, UL data) from the modem subsystem 412 (on outbound transmissions) or from another source such as the UE 115 or the BS 105. The RF unit 414 may also be configured to perform analog beamforming in conjunction with digital beamforming. Although shown as being integrated together in the transceiver 410, the modem subsystem 412 and the RF unit 414 may be separate devices that are coupled together at the UE 115 to enable the UE 115 to communicate with other devices.

[0071] The RF unit 414 may provide modulated and / or processed data (e.g., data packets, or more generally, data messages that may contain one or more data packets and other information) to the antenna 416 for transmission to one or more other devices. The antenna 416 may also receive data messages sent from other devices. The antenna 416 may provide received data messages for processing and / or demodulation at the transceiver 410. The transceiver 410 may provide demodulated and decoded data (e.g., default wake-up configuration, WUS, PDCCH signal, radio resource control (RRC) signal, medium access control (MAC) control element (CE) signal, DL / UL scheduling authorization, DL data, etc.) to the WUS processing and control module 408 for processing. The antenna 416 may include multiple antennas with similar or different designs in order to maintain multiple transmission links. The RF unit 414 may configure the antenna 416. The RF unit 414 and / or the transceiver 410 may include components and / or circuits that may be dynamically powered on and / or powered off to save power. Additionally or alternatively, the RF unit 414 and / or the transceiver 410 may include components and / or circuits having multiple power states, which may be configured to transition from one power state (e.g., a higher power state) to another power state (e.g., a lower power state) to save power.

[0072] In an embodiment, the UE 400 may include multiple transceivers 410 that implement different RATs (e.g., NR and LTE). In an embodiment, the UE 400 may include a single transceiver 410 that implements multiple RATs (e.g., NR and LTE). In an embodiment, the transceiver 410 may include various components, where different combinations of components may implement different RATs.

[0073] Figure 5 5 is a block diagram of an exemplary BS 500 according to aspects of the present disclosure. BS 500 may be BS 105, as described above in Figure 1 As shown, BS 500 may include a processor 502, a memory 504, a WUS processing and control module 508, a transceiver 510 including a modem subsystem 512 and an RF unit 514, and one or more antennas 516. These elements may communicate with each other directly or indirectly, such as via one or more buses.

[0074] The processor 502 may have various characteristics as a specific type of processor. For example, these may include a CPU, a DSP, an ASIC, a controller, an FPGA device, another hardware device, a firmware device, or any combination thereof, which is configured to perform the operations described herein. The processor 502 may also be implemented as a combination of computing devices, such as a DSP and a microprocessor, a combination of multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0075] Memory 504 may include cache memory (e.g., cache memory of processor 502), RAM, MRAM, ROM, PROM, EPROM, EEPROM, flash memory, solid-state memory devices, one or more hard disk drives, memristor-based arrays, other forms of volatile and nonvolatile memory, or a combination of different types of memory. In some examples, memory 504 may include non-transitory computer-readable media. Memory 504 may store instructions 506. Instructions 506 may include instructions that, when executed by processor 502, cause processor 502 to perform operations described herein (e.g., Figure 2 , 3 , 6-11 and 13) instructions for operation. Instruction 506 may also be referred to as code, which may be broadly interpreted as including the above-mentioned Figure 4 Any type of computer-readable statement in question.

[0076] The WUS processing and control module 508 may be implemented via hardware, software, or a combination thereof. For example, the WUS processing and control module 508 may be implemented as a processor, circuit, and / or instruction 506 stored in the memory 504 and executed by the processor 502. In some examples, the WUS processing and control module 508 may be integrated within the modem subsystem 512. For example, the WUS processing and control module 508 may be implemented by a combination of software components (e.g., executed by a DSP or general purpose processor) and hardware components (e.g., logic gates and circuits) within the modem subsystem 512.

[0077] The WUS processing and control module 508 may be used in various aspects of the present disclosure, for example, Figure 2 , 3 , 6-11 and 13. The WUS processing and control module 508 can be configured to send a default wake-up configuration associated with a discontinuous reception (DRX) operation, determine whether to send a WUS during a WUS opportunity based on traffic load, send a physical downlink control channel (PDCCH) signal during a duration associated with a WUS opportunity, send a WUS during a WUS opportunity, and / or perform other functions of the BS related to the wake-up process described in the present disclosure.

[0078] As shown, the transceiver 510 may include a modem subsystem 512 and an RF unit 514. The transceiver 510 may be configured to communicate bidirectionally with other devices such as UE 115 and / or 400 and / or another core network element. The modem subsystem 512 may be configured to modulate and / or encode data according to an MCS (e.g., an LDPC encoding scheme, a turbo encoding scheme, a convolutional encoding scheme, a digital beamforming scheme, etc.). The RF unit 514 may be configured to process (e.g., perform analog-to-digital conversion or digital-to-analog conversion, etc.) the modulated / encoded data (e.g., default wake-up configuration, WUS; PDCCH signal, RRC signal, MAC CE signal, etc.) from the modem subsystem 512 (on outbound transmissions) or from another source such as UE 115 or 400. The RF unit 514 may also be configured to perform analog beamforming in conjunction with digital beamforming. Although shown as being integrated together in transceiver 510, modem subsystem 512 and RF unit 514 may be separate devices that are coupled together at BS 105 to enable BS 105 to communicate with other devices.

[0079] The RF unit 514 can provide modulated and / or processed data (e.g., data packets, or more generally, data messages that can include one or more data packets and other information) to the antenna 516 for transmission to one or more other devices. This can include, for example, transmitting information to the UE 115 or 400 according to aspects of the present disclosure. The antenna 516 can also receive data messages sent from other devices and provide the received data messages for processing and / or demodulation at the transceiver 510. The transceiver 510 can provide demodulated and decoded data (e.g., RACH messages, ACK / NACK for WUS, ACK / NACK for PDCCH signals, UL data, ACK / NACK for DL ​​data, etc.) to the WUS processing and control module 508 for processing. The antenna 516 can include multiple antennas with similar or different designs to maintain multiple transmission links.

[0080] In an embodiment, the BS 500 may include multiple transceivers 510 that implement different RATs (e.g., NR and LTE). In an embodiment, the BS 500 may include a single transceiver 510 that implements multiple RATs (e.g., NR and LTE). In an embodiment, the transceiver 510 may include various components, where different combinations of components may implement different RATs.

[0081] Figure 6 A scheduling / transmission configuration 600 of a wireless communication method according to some aspects of the present disclosure is shown. As shown, the scheduling / transmission configuration 600 is similar in some aspects to the above-mentioned Figure 2The described scheduling / transmission configuration 200. However, according to the present disclosure, Figure 6 The scheduling / transmission configuration 600 also shows a BS operating in a DTX mode, and a UE operating in a DRX / C-DRX mode.

[0082] At 610, the UE is in a sleep state. At a WUS opportunity 620, a WUS 622 is sent by the BS. The UE may monitor the WUS 622 during the WUS opportunity 620 (e.g., using a wake-up search space set). The WUS opportunity 620 is followed by an offset 630 during which the UE may return to a sleep state. The offset 630 separates the WUS opportunity 620 from an associated on-duration 640. During the on-duration 640, the UE is active and may monitor a PDCCH or other signal from the BS and / or send UL data to the BS, as shown in a UL / DL communication block 642. In this regard, in some cases, the UE performs PDCCH monitoring during the on-duration 640 based on information received in the WUS 622. For example, the WUS 622 may instruct the UE to perform one or more of an aperiodic channel state reference signal (A-CSI-RS) trigger, a PDCCH monitoring reduction, a bandwidth part (BWP) switching, or a secondary cell (Scell) wake-up. In addition, the WUS 622 may include PDCCH monitoring parameters, such as PDCCH monitoring duration, PDCCH monitoring period, and the number of candidates for PDCCH blind decoding, for PDCCH monitoring during the on-duration 640 .

[0083] The scheduling / transmission configuration 600 continues with the UE in a sleep state 650, followed by another WUS opportunity 660. However, in the WUS opportunity 660, the BS does not send a WUS. Instead, as part of operating in DTX mode, the BS avoids sending a WUS. In some cases, the BS avoids sending a WUS during the WUS opportunity 660 based on traffic load (e.g., heavy traffic load or sparse traffic load). The offset 670 separates the WUS opportunity 660 from the associated on-duration 680 during which DL / UL communication 682 occurs. During the on-duration 680, the UE may be in an active state or a sleep state. In some instances, a default wake-up configuration indicates whether the UE is in an active state or a sleep state during the on-duration 680. The UE may receive a default wake-up configuration from the BS (e.g., via radio resource control (RRC) signaling, PDCCH signaling, medium access control (MAC) control element (CE) signaling, L1 / L2 signaling, or other signaling). In this regard, the default wake-up configuration may be static, semi-static, and / or dynamically configured. In some instances, as part of DTX operation, the default wake-up configuration controls how the UE performs PDCCH monitoring during one or more DRX on-durations after the BS does not send a WUS during a WUS opportunity.

[0084] Fig. 7A A scheduling / transmission configuration 700 is shown for a wireless communication method according to some aspects of the present disclosure. Fig. 7A Shows something like Figure 2 and Figure 6 700, but shows an example in which the UE performs active PDCCH monitoring during one or more DRX on-durations after the BS does not send a WUS during a WUS opportunity (e.g., as part of a DTX operation). In this regard, items 710, 720, 722, 730, 740, 742, 750, 760, 770, 780, and 782 of the scheduling / transmission configuration 700 correspond to Figure 6 Items 610, 620, 622, 630, 640, 642, 650, 660, 670, 680, and 682 of the scheduling / transmission configuration 600. Therefore, for the sake of brevity, these descriptions are not repeated here. Please refer to Figure 2 Scheduling / transmission configuration 200 and / or Figure 6 See similar and / or corresponding descriptions of scheduling / transmission configuration 600 for further details.

[0085] like Fig. 7AAs shown, the UE performs WUS monitoring 724 during the WUS opportunity 720. As described above, the UE may perform the WUS monitoring 724 based on the WUS configuration received from the network and / or the BS. In this regard, the WUS configuration may indicate to the UE the resources associated with the WUS opportunity 720 (e.g., search spaces including time-frequency resources, periodicity, channels, BWP, frequency carriers, etc.), format information for the WUS (e.g., message structure), etc. Based on the WUS monitoring 724, the UE will receive WUS 722. During the on-duration 740, the UE is active and may monitor the PDCCH or other signals from the BS and / or send UL data to the BS, as shown in the UL / DL communication block 742. In this regard, in Fig. 7A In the illustrated example of , the UE performs PDCCH monitoring 744 during the on-duration 740. The UE may perform PDCCH monitoring 744 based on information received in the WUS 722. For example, the WUS 722 may instruct the UE to perform one or more of aperiodic channel state reference signal (A-CSI-RS) triggering, PDCCH monitoring reduction, bandwidth part (BWP) switching, or secondary cell (Scell) wake-up. In addition, the WUS 722 may include PDCCH monitoring parameters, such as PDCCH monitoring duration, PDCCH monitoring period, and the number of candidates for PDCCH blind decoding, for PDCCH monitoring during the on-duration 740.

[0086] Also like Fig. 7A As shown, the UE performs WUS monitoring 764 during the WUS opportunity 760. This can be similar to the WUS monitoring 724 during the WUS opportunity 720. However, as shown, during the WUS 760, the BS does not send a WUS, and / or the UE does not detect / receive a WUS. In some cases, as part of a DTX operation, the BS does not send a WUS during the WUS opportunity 760. More specifically, in some cases, the BS does not send a WUS during the WUS opportunity 760 based on traffic load (e.g., heavy traffic load or sparse traffic load). Although no WUS is received during the WUS opportunity 760, the UE is active during the on-duration 780 and can monitor the PDCCH or other signals from the BS and / or send UL data to the BS, as indicated by the UL / DL communication block 782. In this regard, in Fig. 7AIn the illustrated example of FIG. 7 , the UE performs PDCCH monitoring 784 during an on-duration 780 associated with a WUS opportunity 760. The UE may actively perform PDCCH monitoring 784 based on a default wake-up configuration received from the BS (e.g., via RRC signaling, PDCCH signaling, medium access control (MAC) control element (CE) signaling, L1 / L2 signaling, or other signaling). For example, when the UE does not receive and / or detect a WUS from the BS during the WUS opportunity 760, the default wake-up configuration may instruct the UE to perform one or more of aperiodic channel state reference signal (A-CSI-RS) triggering, PDCCH monitoring reduction, bandwidth part (BWP) switching, or secondary cell (Scell) wake-up in one or more on-durations associated with the WUS opportunity 760.

[0087] Figure 7B A scheduling / transmission configuration 790 is shown for a wireless communication method in accordance with some aspects of the present disclosure. Figure 7B Shows something like Figure 2 , 6 7A, but shows an example where the UE skips PDCCH monitoring by remaining in a sleep state during one or more DRX on-durations after the BS does not send a WUS during a WUS opportunity (e.g., as part of a DTX operation). More specifically, during Figure 7B In the illustrated example of , the UE does not perform PDCCH monitoring during the on-duration 780, but instead remains in the sleep state 786 during the on-duration 780 associated with the WUS opportunity 760. The UE may be in the sleep state 786 based on a default wake-up configuration received from the BS (e.g., via RRC signaling, PDCCH signaling, medium access control (MAC) control element (CE) signaling, or other signaling). For example, when the UE does not receive and / or detect a WUS from the BS during the WUS opportunity 760, the default wake-up configuration may instruct the UE to skip PDCCH monitoring and / or otherwise utilize the sleep state in one or more on-durations associated with the WUS opportunity 760.

[0088] Fig. 8A A protocol diagram of a wireless communication method 800 according to some aspects of the present disclosure is shown. More specifically, Fig. 8A Shown with Fig. 7A A method 800 corresponding to the scheduling / transmission configuration 700 or a similar scheduling / transmission configuration illustrates an example in which a UE performs active PDCCH monitoring during one or more DRX on-durations after the BS does not send a WUS during a WUS opportunity (e.g., as part of a DTX operation).

[0089] As shown, method 800 includes a BS sending a default wake-up configuration 810 to an active UE. The default wake-up configuration 810 may be sent to the active UE via RRC, PDCCH, MAC CE, L1 / L2 signaling, or other suitable signaling.

[0090] The method 800 also includes the BS sending the WUS 820 to the UE (or UE group). In this regard, the UE performs WUS 820 monitoring for the WUS 820 after the sleep state. In some cases, the UE performs WUS monitoring according to the WUS configuration.

[0091] The method 800 also includes the BS sending PDCCH signaling 830. After the offset period, the UE performs PDCCH monitoring. In some cases, the UE performs PDCCH monitoring on the PDCCH signaling 830 based on information in the WUS 820. In this regard, the WUS 820 may instruct the UE to perform active PDCCH monitoring during the on-duration during which the PDCCH signaling 830 is sent.

[0092] The method 800 also includes the BS refraining from sending a WUS during the WUS opportunity, as shown at 840, for example, to save system resources. In this regard, the method 800 includes the UE determining, based on its WUS monitoring, that a WUS is not received from the BS during the WUS opportunity.

[0093] The method 800 also includes the BS sending PDCCH signaling 850. After the offset period, the UE performs PDCCH monitoring. In some examples, the UE performs PDCCH monitoring on the PDCCH signaling 850 based on the default wake-up configuration 810 received from the BS. In this regard, the default wake-up configuration 810 may instruct the UE to perform active PDCCH monitoring during the on-duration of sending the PDCCH signaling 850, such as Fig. 8A shown.

[0094] Figure 8B A protocol diagram of a wireless communication method 860 according to some aspects of the present disclosure is shown. More specifically, Figure 8B Shown with Figure 7BMethod 860 corresponding to scheduling / transmission configuration 790 or similar scheduling / transmission configurations, the method shows an example of a UE skipping PDCCH monitoring by remaining in a sleep state during one or more DRX on-durations after the BS does not send a WUS during a WUS opportunity (e.g., as part of a DTX operation). In this regard, method 860 is similar to method 800 in many respects, including steps 810, 820, 830, and 840. However, as shown in 870, in method 860, the BS avoids sending PDCCH signaling to the UE (or UE group). That is, after the BS avoids sending a WUS during a WUS opportunity, it does not send PDCCH signaling for the UE (or UE group). In some instances, the UE also skips PDCCH monitoring based on a default wake-up configuration 810 received from the BS. In this regard, as shown in FIG. Figure 8B As shown, the default wake-up configuration 810 may instruct the UE to skip PDCCH monitoring during the On-Duration corresponding to a WUS opportunity when the BS avoids sending a WUS.

[0095] Fig. 9 A protocol diagram of a wireless communication method 900 according to some aspects of the present disclosure is shown. More specifically, Fig. 9 A method 900 is shown illustrating an example of a UE operating using two different wake-up configurations according to the present disclosure.

[0096] As shown, method 900 includes a BS sending a default wake-up configuration 910 to a UE in an awake state or an active state. The default wake-up configuration 910 may be sent to the active state UE via RRC, PDCCH, MAC CE or other suitable signaling.

[0097] The method 900 also includes the BS avoiding sending a WUS to the UE (or UE group) during the WUS opportunity, as shown in 920. As part of the method 900, the UE performs WUS monitoring and determines that no WUS is received from the BS during the WUS opportunity. In this regard, the UE performs WUS monitoring after the sleep state. In some cases, the UE performs WUS monitoring according to the WUS configuration.

[0098] The method 900 further includes the BS sending PDCCH signaling 930. After the offset period, the UE wakes up according to the first wake-up configuration (eg, Fig. 9In some instances, the UE performs PDCCH monitoring on the PDCCH signaling 930 based on the default wake-up configuration 910 received from the BS. In this regard, the default wake-up configuration 910 may instruct the UE to operate with a first wake-up configuration (e.g., PDCCH monitoring mode 1) for a certain amount of time until a timer expires and / or until another change condition is met (e.g., a threshold number of DRX duty cycles and / or WUS opportunities (e.g., 1, 2, 3, 4, 5, etc.) occurs, UL or DL ​​communication is initiated), and then in a second different wake-up configuration (e.g., Fig. 9 In some instances, the first wake-up configuration (e.g., PDCCH monitoring mode 1) is a default or fallback wake-up configuration, such that the UE operates in the first wake-up configuration unless and until a specific condition is met (e.g., a certain amount of time has passed, a timer expires, a threshold number of WUS opportunities have passed, UL communication is initiated, DL communication is initiated, etc.), at which point the UE will switch to the second wake-up configuration (e.g., PDCCH monitoring mode 2). In other instances, the second wake-up configuration (e.g., PDCCH monitoring mode 2) is a default or fallback wake-up configuration, such that the UE operates in the first wake-up configuration until a specific condition is met (e.g., a certain amount of time has passed, a timer expires, a threshold number of WUS opportunities have passed, UL communication is initiated, DL communication is initiated, etc.), at which point the UE will fall back to the default second wake-up configuration.

[0099] exist Fig. 9 In the illustrated embodiment, the first wake-up configuration (PDCCH monitoring mode 1) is shown as ending at the end of the UE sleep state and the beginning of the WUS opportunity at which the UE will perform WUS monitoring. However, it should be understood that the first wake-up configuration (PDCCH monitoring mode 1) can end at any time based on a timer, condition or other parameter, and another wake-up configuration begins. In addition, although Fig. 9 The UE is shown operating in two different wake-up configurations, but it should be understood that the UE can operate in any number of different wake-up configurations. In this regard, in some instances, the UE can store two or more wake-up configurations in a memory, and the BS can provide an indication of which of the stored wake-up configurations the UE will use (and for what time period). In addition, the BS can provide updated wake-up configurations to the UE from time to time for local storage by the UE. In this way, the available wake-up configurations and the actual wake-up configurations implemented by the UE can be updated semi-statically and / or dynamically over time.

[0100] Fig.10 A protocol diagram of a wireless communication method 1000 according to some aspects of the present disclosure is shown. More specifically, Fig.10 Shows something like Fig. 8AMethod 800 and corresponding to Fig. 7A 8a , but shows an example in which the UE receives a default wake-up configuration as part of a WUS from the BS. As shown, at step 1020, method 1000 includes the BS sending a WUS including a default wake-up configuration to the UE (or UE group). The WUS with the default wake-up configuration may be sent via a PDCCH or other suitable signaling. The remaining steps of method 1000 (e.g., 1030, 1040, and 1050) are similar to steps 830, 840, and 850 of method 800 and the associated UE actions shown in FIG. 8a . However, in other instances, the remaining steps of method 1000 (e.g., 1030, 1040, and 1050) are similar to steps 830, 840, and 870 of method 860 and Figure 8B The associated UE actions shown in .

[0101] In some cases, the UE receives a default wake-up configuration or an indication of which default wake-up configuration to use in a manner different from the BS. For example, in some cases, the default wake-up configuration may be mandatory by specification (i.e., without signaling). In addition, the UE may pre-program one or more default wake-up configurations (e.g., in memory 404). In some embodiments, the UE utilizes a pre-programmed default wake-up configuration based on one or more of the operating conditions (e.g., connection status, BWP, carrier, geographic location, priority, service, subscription, etc.). In this regard, each of the pre-programmed default wake-up configurations may be associated with one or more of the operating conditions, and the UE selects an appropriate default wake-up configuration based on the current operating conditions. In some instances, the UE may receive an indication of which of the pre-programmed default wake-up configurations to use from the BS. In addition, in some instances, the UE may be the default wake-up configuration from another UE (e.g., by peer-to-peer communication). For example, the UE may receive a default wake-up configuration (e.g., based on BWP, carrier, geographic location, priority, service, subscription, etc.) from another UE in a public group. In other cases, the UE may receive a default wake-up configuration from one or more other network devices.

[0102] Fig.11 1 shows a protocol diagram of a wireless communication method 1100 according to some aspects of the present disclosure. More specifically, Fig.11 A method 1100 is shown illustrating communication between a BS and multiple UEs as part of a DRX / DTX wake-up procedure according to the present disclosure.

[0103] As shown, method 1100 includes a BS providing a plurality of UEs (ie, Fig.111, UE 2, and UE 3 in FIG. 1 ). When receiving the default wake-up configuration 1100, the UE may be in an awake state or an active state. The default wake-up configuration 1110 may be sent to the active state UE via RRC, PDCCH, MAC CE, or other suitable signaling. In some instances, the default wake-up configuration 1110 is transmitted to the UE as part of the WUS (e.g., see FIG. 1 ). Fig.10 ). The UEs may receive the same or different wake-up configurations 1110. For example, in some embodiments, the UEs are grouped based on BWP, carrier, geographic location, priority, service, subscription, and / or other factors. The UEs in a common group may receive the same wake-up configuration 1110. In other instances, the wake-up configuration 1110 is UE-specific. In this regard, the UEs in a common group may receive different default wake-up configurations 1110 (e.g., based on the traffic load of the UE).

[0104] The method 1100 also includes the BS sending the WUS 1120 to the UE. In this regard, the UEs in the common group may be configured to receive the same WUS 1120 and / or a portion of the WUS (see, e.g., message format 300). Fig.11 In the illustrated example of , group 1122 indicates that the same WUS (or part) is being sent to UE1 and UE2. In this regard, UE1 and UE2 may be part of a common group (e.g., based on BWP, carrier, geographic location, priority, service, subscription, and / or other factors), or may otherwise be configured to receive the same WUS (or part) from the BS. In other cases, a different WUS or (part) is sent to each UE. In some cases, the UE monitors WUS 1120 according to the WUS configuration. The WUS configuration may be common to a UE group and / or a specific UE.

[0105] The method 1100 also includes the BS sending PDCCH signaling 1130 to the UE. The UE may perform PDCCH monitoring on the PDCCH signaling 1130 based on the information in the WUS 1120. In this regard, the WUS 1120 may instruct the UE to perform active PDCCH monitoring during the DRX on duration during which the PDCCH signaling 1130 is sent.

[0106] The method 1100 also includes the BS refraining from sending a WUS during the WUS opportunity, as shown at 1140, for example, to save system resources. In this regard, the method 1100 includes the UE determining, based on the WUS monitoring, that a WUS is not received from the BS during the WUS opportunity.

[0107] The method 1100 also includes the BS sending PDCCH signaling 1150. In some instances, the UE performs PDCCH monitoring on the PDCCH signaling 1150 based on the default wake-up configuration 1110 received from the BS. In this regard, the default wake-up configuration 1110 may instruct the UE to perform active PDCCH monitoring during the DRX on duration during which the PDCCH signaling 1150 is sent. Alternatively, the default wake-up configuration 1110 may instruct the UE to remain in a sleep state during the DRX on duration during which the PDCCH signaling 1150 is sent. For example, Fig.11 Two UEs performing active PDCCH monitoring (i.e., UE1 performing active PDCCH monitoring 1152 and UE2 performing active PDCCH monitoring 1154) are shown, while another UE remains in a sleep state (i.e., UE3 remains in a sleep state 1156). In this regard, the UEs in the common group (e.g., Fig.11 UE1 and UE2 in the common group may be configured to have the same default wake-up configuration so that when no WUS signal is received from the BS during a wake-up opportunity, the UEs in the common group perform PDCCH monitoring in the same manner. Fig. 9 An example with three UEs is shown, but it should be understood that the concepts of the present disclosure are applicable to any number of UEs (e.g., 5, 10, 15, 20, 50, 100, or more).

[0108] Fig.12 1 is a flow chart of a communication method 1200 according to some aspects of the present disclosure. Aspects of the method 1200 may be performed by a wireless communication device such as a UE 115 and / or 400 using one or more components (e.g., a processor 402, a memory 404, a WUS processing and control module 408, a transceiver 410, a modem 412, one or more antennas 416, and various combinations thereof). As shown, the method 1200 includes a plurality of enumerated steps, but the method 1200 may include additional steps before, after, and between the enumerated steps. For example, in some instances, one or more aspects of the methods 800, 860, 900, 1000, and / or 1100, the scheduling / transmission configurations 200, 600, 700, and / or 790, and / or the message structure 300 may be implemented as part of the method 1200. In some cases, one or more of the enumerated steps may be omitted or performed in a different order.

[0109] At step 1210, method 1200 includes receiving, by a user equipment (UE) from a base station (BS), a default wake-up configuration associated with discontinuous reception (DRX) operation. In some instances, step 1210 includes receiving, by the UE from the BS via at least one of radio resource control (RRC) signaling, PDCCH signaling, or medium access control (MAC) control element (CE) signaling, the default wake-up configuration. In some instances, the default wake-up configuration includes an indication to the UE to perform one or more of aperiodic channel state reference signal (A-CSI-RS) triggering, PDCCH monitoring reduction, bandwidth part (BWP) switching, or secondary cell (Scell) wake-up.

[0110] In some instances, the received default wake-up configuration includes an indication to the UE to operate in a first wake-up configuration or in a different second wake-up configuration. In some instances, the method 1200 includes operating by the UE using the first wake-up configuration in a first time period, and operating by the UE using the second wake-up configuration in a second time period. In this regard, the UE may operate in the first time period and / or the second time period based on one or more timers. For example, the default wake-up configuration may cause the UE to operate in the first wake-up configuration until the timer expires or other change conditions are met (e.g., a threshold number of DRX duty cycles and / or WUS opportunities (e.g., 1, 2, 3, 4, 5, etc.), UL or DL ​​communication is started, etc.), and then operate in a second different wake-up configuration. The default wake-up configuration may also cause the UE to operate in a temporary wake-up configuration and then revert to the default configuration after a certain amount of time or when a certain condition is met. Any number of different wake-up configurations may be implemented over time by the BS and / or the UE. In this regard, in some instances, the UE may store two or more wake-up configurations in a memory (e.g., memory 404). The BS may provide the UE with an indication of which wake-up configuration to implement, including how long (e.g., based on a timer and / or condition). In some cases, as part of the default wake-up configuration received at step 1210, an indication to the UE of which wake-up configuration to implement and how long to implement is included.

[0111] At step 1220, method 1200 includes monitoring, by the UE, a WUS from the BS during a wake-up signal (WUS) opportunity. The UE may monitor the WUS based on a WUS configuration received from the BS. In this regard, method 1200 may include receiving a WUS configuration from the BS. The WUS configuration for the UE or an associated UE group to which the UE belongs may be fixed, semi-static and / or dynamically configured by the BS. In some cases, the UE receives the WUS configuration as part of a WUS sent during a WUS opportunity. The WUS configuration may indicate to the UE resources associated with a WUS opportunity, a WUS format, etc. (e.g., a search space including time and frequency, a period, a channel, a BWP, a frequency carrier, etc.). The UE may monitor, receive and / or decode the WUS using information from the WUS configuration.

[0112] At step 1230, method 1200 includes determining, by the UE, whether a WUS is received from the BS during the WUS opportunity. The UE may determine whether a WUS has been received from the BS using information from the WUS configuration. For example, if the UE monitors resources associated with the WUS opportunity and does not detect a WUS, the UE may determine that a WUS has not been received from the BS during the WUS opportunity. In addition, the UE may use an identifier associated with the UE or a UE group (e.g., a PS-RNTI, a C-RNTI, etc.) to determine whether a WUS has been received from the BS. For example, if the UE does not receive a wake-up downlink control message or a WUS addressed to an identifier associated with the UE (or a UE group of which the UE is a part), the UE may determine that a WUS has not been received from the BS during the WUS opportunity.

[0113] At step 1240, method 1200 includes performing, by the UE, physical downlink control channel (PDCCH) monitoring based on a default wake-up configuration and whether a WUS is received from the BS during a WUS opportunity. If the UE receives a WUS from the BS during a WUS opportunity, the UE may perform PDCCH monitoring based on information in the WUS. For example, the WUS may indicate to the UE to trigger an aperiodic channel state reference signal (A-CSI-RS), use a reduced PDCCH monitoring frequency, perform a bandwidth part (BWP) switching, perform a secondary cell (Scell) wake-up, and / or utilize other PDCCH monitoring techniques. In addition, the WUS may indicate to the UE to skip PDCCH monitoring (e.g., remain in a sleep state) during one or more on-durations associated with the WUS opportunity.

[0114] In step 1230, in the case where the UE does not receive a WUS from the BS during a WUS opportunity, the default wake-up configuration may indicate how the UE operates. The default wake-up configuration of the UE or the associated UE group to which the UE belongs may be fixed, semi-static and / or dynamically configured by the BS. In some instances, the default wake-up configuration will cause the UE to skip PDCCH monitoring in one or more on-durations associated with the WUS opportunity in response to determining that a WUS was not received from the BS during the WUS opportunity. In some embodiments, the UE skips PDCCH monitoring by remaining in a sleep state in one or more on-durations, thereby providing additional power savings to the UE. In other instances, the default wake-up configuration causes the UE to actively perform PDCCH monitoring in one or more on-durations associated with the WUS opportunity in response to determining that a WUS was not received from the BS during the WUS opportunity. In this regard, the default wake-up configuration may indicate aspects related to performing PDCCH monitoring to the UE. For example, the default wake-up configuration may indicate to the UE to trigger an aperiodic channel state reference signal (A-CSI-RS), use a reduced PDCCH monitoring frequency, perform a bandwidth part (BWP) switching, perform a secondary cell (Scell) wake-up, and / or utilize other PDCCH monitoring techniques. In some instances, the default wake-up configuration is semi-statically and / or dynamically updated based on traffic load conditions (e.g., for UE groups, BWPs, carriers, etc.). The default wake-up configuration may be semi-statically and / or dynamically configured over time to select whether the UE remains in a sleep state during one or more on-durations associated with a WUS opportunity (e.g., during sparse traffic conditions) or actively monitors the PDCCH during one or more on-durations associated with a WUS opportunity (e.g., during heavy traffic conditions).

[0115] In addition, according to some aspects, the BS and the UE can utilize a variety of different wake-up configurations. For example, the BS can determine to provide different wake-up configurations to different UEs or other devices in the cell of the BS. In this way, and according to various aspects, different types of UEs have different default wake-up configurations with different wake-up characteristics. For example, a first UE may have an initial / first wake-up configuration, while another UE may have a different wake-up configuration. In a scenario where the BS interacts with multiple UEs of different categories or types, providing a variety of different wake-up configurations enables the BS to provide UE-specific wake-up configurations that help save power and processing resources. By dynamically controlling the wake-up configuration, the BS can customize specific operating behaviors for one or more specific UEs in the communication network.

[0116] Fig.131 is a flow chart of a communication method 1300 according to some aspects of the present disclosure. Aspects of the method 1300 may be performed by a wireless communication device such as BS 105 and / or 500 using one or more components (e.g., processor 502, memory 504, WUS processing and control module 508, transceiver 510, modem 512, one or more antennas 516, and various combinations thereof). As shown, the method 1300 includes a plurality of enumerated steps, but the method 1300 may include additional steps before, after, and between the enumerated steps. For example, in some instances, one or more aspects of the methods 800, 860, 900, 1000, and / or 1100, the scheduling / transmission configurations 200, 600, 700, and / or 790, and / or the message structure 300 may be implemented as part of the method 1300. In some cases, one or more of the enumerated steps may be omitted or performed in a different order.

[0117] At step 1310, method 1300 includes sending, by a base station (BS), a default wake-up configuration associated with discontinuous reception (DRX) operation to a user equipment (UE). In some instances, step 1310 includes sending, by the BS, the default wake-up configuration to the UE via at least one of radio resource control (RRC) signaling, PDCCH signaling, or medium access control (MAC) control element (CE) signaling. In some instances, the default wake-up configuration includes an indication to the UE to perform one or more of aperiodic channel state reference signal (A-CSI-RS) triggering, PDCCH monitoring reduction, bandwidth part (BWP) switching, or secondary cell (Scell) wake-up. The default wake-up configuration of the UE or the associated UE group to which the UE belongs may be fixed, semi-static, and / or dynamically configured by the BS. To this end, the BS may send an updated default wake-up configuration from time to time. In some instances, the default wake-up configuration is semi-statically and / or dynamically updated by the BS based on traffic load conditions (e.g., for UE groups, BWPs, carriers, etc.). The default wake-up configuration can be semi-statically and / or dynamically configured to select whether the UE remains in a sleep state during one or more on-durations associated with a WUS opportunity (e.g., during sparse traffic conditions) or actively monitors the PDCCH during one or more on-durations associated with a WUS opportunity (e.g., during heavy traffic conditions).

[0118] At step 1320, method 1300 includes determining, by the BS, whether to send a wake-up signal (WUS) to the UE during a WUS opportunity based on the traffic load. In a sparse traffic scenario, the likelihood that each UE in a wake-up group (e.g., sharing the same PDCCH-WUS) needs to be woken up is very small. As a result, most of the time, the wake-up indicator of the WUS will be all zeros, or otherwise indicate that the UE should remain in a sleep state during one or more on-durations associated with the WUS opportunity. On the other hand, in a high traffic scenario, the likelihood that each UE in the wake-up group needs to be woken up is very high. Therefore, most of the time in this case, the wake-up indicator will be all 1s, or otherwise indicate that the UE should actively monitor the PDCCH during one or more on-durations associated with the WUS opportunity.

[0119] In such sparse traffic and high traffic scenarios, the BS may avoid sending WUS during WUS opportunities. In addition to reducing network traffic and potential interference, a BS that avoids sending WUS can also provide power savings to both the BS and the UE. To this end, in some cases, if the traffic load is lower than a first threshold, the BS determines not to send a WUS to the UE during the WUS opportunity, and if the traffic load is higher than a second threshold, it determines to send a WU to the UE during the WUS opportunity. The first and second thresholds may be the same or different. For example, in some cases, the traffic load is evaluated based on the number of wake-up indicators that will be the same WUS for a specific WUS and / or WUS opportunity. In this regard, the threshold for determining not to send a WUS may be the same or different from the threshold for determining to send a WUS. For example, if more than a threshold percentage (e.g., 50%, 60%, 70%, 75%, 80%, 90%, etc.) and / or a threshold number (e.g., 2, 3, 4, 5, 6, 7, 8, etc.) of wake-up indicators are the same, the BS may avoid sending a WUS regardless of whether the common indicator will instruct the UE to wake up or remain in a sleep state. As another example, the threshold percentage and / or threshold number of wake-up indicators that are required for the BS to avoid sending a WUS while being the same may be different depending on whether the common indicator instructs the UE to wake up or remain in a sleep state. In this regard, the threshold percentage and / or threshold number may be higher when the common indicator instructs the UE to wake up than when the common indicator instructs the UE to remain in a sleep state, or vice versa.

[0120] At step 1330, based on the determination at step 1320, method 1300 includes: (1) sending a WUS signal to the UE during the WUS opportunity, or (2) refraining from sending a WUS signal to the UE during the WUS opportunity. When the BS sends the WUS, the BS may utilize Figure 3The message structure of the BS or any other suitable message structure (e.g., including all wake-up indicators before all wake-up information fields, including all wake-up information fields before all wake-up indicators, staggering wake-up indicators and wake-up information fields, etc.). In some cases, the WUS sent by the BS during the WUS opportunity includes a WUS configuration for the UE (or UE group). The WUS configuration may indicate to the UE the resources associated with the WUS opportunity, the WUS format, etc. (e.g., search space including time and frequency, period, channel, BWP, frequency carrier, etc.). In some cases, the WUS sent by the BS during the WUS opportunity includes a default wake-up configuration.

[0121] When the BS does not send a WUS in step 1330, the UE may operate according to the default wake-up configuration sent in step 1310. In some instances, the default wake-up configuration sent in step 1310 indicates that the UE operates in a first wake-up configuration or a second different wake-up configuration. In some instances, the default wake-up configuration sent in step 1310 indicates that the UE operates using the first wake-up configuration in a first time period and operates using the second wake-up configuration in a second time period. In this regard, the UE may operate in the first time period and / or the second time period based on one or more timers. For example, the default wake-up configuration may cause the UE to operate in the first wake-up configuration until the timer expires or other change conditions are met (e.g., a threshold number of DRX duty cycles and / or WUS opportunities (e.g., 1, 2, 3, 4, 5, etc.), UL or DL ​​communication is started, etc.), and then operate in a second different wake-up configuration. That is, the default wake-up configuration may cause the UE to operate in a temporary wake-up configuration and then revert to the default configuration after a certain amount of time or when a certain condition is met. Any number of different wake-up configurations may be implemented by the BS and / or the UE over time. As described above, the default wake-up configuration may be semi-statically and / or dynamically configured to select whether the UE remains in a sleep state or actively monitors the PDCCH during one or more on-durations associated with a WUS opportunity.

[0122] At step 1340, method 1300 includes sending a physical downlink control channel (PDCCH) signal by the BS during a duration associated with the WUS opportunity. In this regard, the duration associated with the WUS opportunity may include one or more discontinuous reception (DRX) on durations associated with the WUS opportunity. As described above, in the case where the BS does not send a WUS during the WUS opportunity, the default wake-up configuration sent at step 1310 may indicate how the UE performs PDCCH monitoring during the duration associated with the WUS opportunity. In some instances, the default wake-up configuration from step 1310 will cause the UE to skip PDCCH monitoring in one or more on durations associated with the WUS opportunity in response to determining that a WUS was not received from the BS during the WUS opportunity. In other cases, the default wake-up configuration sent at step 1310 causes the UE to actively perform PDCCH monitoring in one or more on durations associated with the WUS opportunity in response to determining that a WUS was not received from the BS during the WUS opportunity. That is, in this case, the UE will monitor the PDCCH signal sent at 1340.

[0123] Information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

[0124] The various illustrative blocks and modules described in conjunction with the disclosure herein may be implemented or executed using a general purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration.

[0125] The functions described herein can be implemented with hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, these functions can be stored on a computer-readable medium or transmitted thereon as one or more instructions or codes. Other examples and implementations are within the scope of the present disclosure and the appended claims. For example, due to the nature of software, the above functions can be implemented using software, hardware, firmware, hard wiring, or any combination of these executed by a processor. The features that implement the functions can also be physically located in various locations, including being distributed so that parts of the functions are implemented in different physical locations. In addition, as used herein, including in the claims, "or" as used in a list of items (e.g., a list of items beginning with phrases such as "at least one" or "one or more") indicates a list of inclusions, such that, for example, a list of [at least one of A, B, or C] means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0126] As those skilled in the art will now appreciate, and depending on the specific application at hand, many modifications, substitutions and changes may be made to the materials, devices, configurations and methods of use of the apparatus of the present disclosure without departing from the spirit and scope of the present disclosure. In view of this, the scope of the present disclosure should not be limited to the scope of the specific embodiments shown and described herein, as they are merely some examples thereof, but should be fully commensurate with the scope of the claims appended hereto and their functional equivalents.

Claims

1. A wireless communication method, comprising: Receiving, by a user equipment UE, a default wake-up configuration associated with a discontinuous reception (DRX) operation from a base station BS; Monitoring, by the UE, a WUS from the BS during a wake-up signal WUS opportunity; determining, by the UE, that the WUS is not received from the BS during the WUS opportunity; as well as The UE performs the following operations based on the default wake-up configuration: skipping Physical Downlink Control Channel (PDCCH) monitoring for a duration associated with the WUS opportunity; or PDCCH monitoring for a duration associated with the WUS opportunity.

2. The method according to claim 1, wherein: The duration associated with the WUS opportunity includes one or more DRX on-durations associated with the WUS opportunity.

3. The method according to claim 1, wherein: Receiving the default wake-up configuration includes: The default wake-up configuration is received by the UE from the BS via radio resource control (RRC) signaling.

4. The method according to claim 1, wherein: Receiving the default wake-up configuration includes: The default wake-up configuration is received by the UE from the BS via PDCCH signaling.

5. The method according to claim 1, wherein: Receiving the default wake-up configuration includes: The default wake-up configuration is received by the UE from the BS via medium access control (MAC) control element (CE) signaling.

6. The method according to claim 1, wherein: Receiving the default wake-up configuration includes: The default wake-up configuration with an indication to operate in a first wake-up configuration or to operate in a second wake-up configuration is received by the UE from the BS, the second wake-up configuration being different from the first wake-up configuration.

7. The method according to claim 6, further comprising: The UE operates using the first wake-up configuration within a first time period; as well as The UE operates using the second wake-up configuration during a second time period.

8. The method according to claim 7, wherein: The operation of using the first wake-up configuration in the first time period includes: The UE operates using the first wake-up configuration within the first time period based on a timer.

9. The method according to claim 1, wherein: Receiving the default wake-up configuration includes: The default wake-up configuration with an indication of an aperiodic channel state reference signal (A-CSI-RS) trigger is received by the UE from the BS.

10. The method according to claim 1, wherein: Receiving the default wake-up configuration includes: The default wake-up configuration with an indication of reduced PDCCH monitoring is received by the UE from the BS.

11. The method according to claim 1, wherein: Receiving the default wake-up configuration includes: The default wake-up configuration with an indication of bandwidth part (BWP) switching is received by the UE from the BS.

12. The method according to claim 1, wherein: Receiving the default wake-up configuration includes: The default wake-up configuration having an indication for waking up a secondary cell (Scell) is received by the UE from the BS.

13. A user equipment, comprising: The transceiver is configured as: receiving a default wake-up configuration associated with a discontinuous reception (DRX) operation from a base station BS; as well as During a wake-up signal WUS opportunity, monitoring a WUS from the BS; as well as A processor in communication with the transceiver, the processor being configured to: determining that the WUS is not received from the BS during the WUS opportunity; and Based on the default wake-up configuration, the following operations are performed: skipping Physical Downlink Control Channel (PDCCH) monitoring for a duration associated with the WUS opportunity; or PDCCH monitoring for a duration associated with the WUS opportunity.

14. The user equipment according to claim 13, wherein: The duration associated with the WUS opportunity includes one or more DRX on-durations associated with the WUS opportunity.

15. The user equipment according to claim 13, wherein: The transceiver is further configured to: The default wake-up configuration is received from the BS via radio resource control (RRC) signaling.

16. The user equipment according to claim 13, wherein: The transceiver is further configured to: The default wake-up configuration is received from the BS via PDCCH signaling.

17. The user equipment according to claim 13, wherein: The transceiver is further configured to: The default wake-up configuration is received from the BS via Medium Access Control (MAC) Control Element (CE) signaling.

18. The user equipment according to claim 13, wherein: The transceiver is further configured to: The default wake-up configuration is received from the BS with an indication to operate in a first wake-up configuration or to operate in a second wake-up configuration, the second wake-up configuration being different from the first wake-up configuration.

19. The user equipment according to claim 18, wherein: The processor is further configured to: operating using the first wake-up configuration during a first time period; and The second wake-up configuration is used to operate during a second time period.

20. The user equipment according to claim 19, wherein: The processor is further configured to: Operating using the first wake-up configuration within the first time period based on a timer.

21. The user equipment according to claim 13, wherein: The transceiver is further configured to: The default wake-up configuration with an indication of an aperiodic channel state reference signal (A-CSI-RS) trigger is received from the BS.

22. The user equipment according to claim 13, wherein: The transceiver is further configured to: The default wake-up configuration with an indication of reduced PDCCH monitoring is received from the BS.

23. The user equipment according to claim 13, wherein: The transceiver is further configured to: The default wake-up configuration with an indication of bandwidth part (BWP) switching is received from the BS.

24. The user equipment according to claim 13, wherein: The transceiver is further configured to: The default wake-up configuration having an indication for waking up a secondary cell (Scell) is received from the BS.

25. A non-transitory computer readable medium having program code recorded thereon, the program code comprising: code for causing a user equipment UE to receive a default wake-up configuration associated with a discontinuous reception (DRX) operation from a base station BS; code for causing the UE to monitor a WUS from the BS during a wake-up signal WUS opportunity; code for causing the UE to determine that the WUS is not received from the BS during the WUS opportunity; as well as Code for causing the UE to perform the following operations based on the default wake-up configuration: skipping Physical Downlink Control Channel (PDCCH) monitoring for a duration associated with the WUS opportunity; or PDCCH monitoring for a duration associated with the WUS opportunity.

26. The non-transitory computer readable medium of claim 25, wherein: The duration associated with the WUS opportunity includes one or more DRX on-durations associated with the WUS opportunity.

27. The non-transitory computer readable medium of claim 25, wherein: The code for causing the UE to receive the default wake-up configuration includes: Code for causing the UE to receive the default wake-up configuration from the BS via radio resource control (RRC) signaling.

28. The non-transitory computer readable medium of claim 25, wherein: The code for causing the UE to receive the default wake-up configuration includes: Code for causing the UE to receive the default wake-up configuration from the BS via PDCCH signaling.

29. The non-transitory computer readable medium of claim 25, wherein: The code for causing the UE to receive the default wake-up configuration includes: Code for causing the UE to receive the default wake-up configuration from the BS via medium access control (MAC) control element (CE) signaling.

30. The non-transitory computer readable medium of claim 25, wherein: The code for causing the UE to receive the default wake-up configuration includes: Code for causing the UE to receive, from the BS, the default wake-up configuration with an indication to operate in a first wake-up configuration or to operate in a second wake-up configuration, the second wake-up configuration being different from the first wake-up configuration.

31. The non-transitory computer readable medium of claim 30, further comprising: code for causing the UE to operate using the first wake-up configuration within a first time period; as well as Code for causing the UE to operate using the second wake-up configuration during a second time period.

32. The non-transitory computer readable medium of claim 31 , wherein: The code for causing the UE to operate using the first wake-up configuration within the first time period includes: Code for causing the UE to operate using the first wake-up configuration within the first time period based on a timer.

33. The non-transitory computer readable medium of claim 25, wherein: The code for causing the UE to receive the default wake-up configuration includes: Code for causing the UE to receive the default wake-up configuration with an indication of an aperiodic channel state reference signal (A-CSI-RS) trigger from the BS.

34. The non-transitory computer readable medium of claim 25, wherein: The code for causing the UE to receive the default wake-up configuration includes: Code for causing the UE to receive, from the BS, the default wake-up configuration with an indication of reduced PDCCH monitoring.

35. The non-transitory computer readable medium of claim 25, wherein: The code for causing the UE to receive the default wake-up configuration includes: Code for causing the UE to receive the default wake-up configuration with an indication of bandwidth part (BWP) switching from the BS.

36. The non-transitory computer readable medium of claim 25, wherein: The code for causing the UE to receive the default wake-up configuration includes: The method further comprises: providing a code for causing the UE to receive, from the BS, the default wake-up configuration having an indication for waking up a secondary cell (Scell).

37. A wireless communication device, comprising: means for receiving a default wake-up configuration associated with discontinuous reception (DRX) operation from a base station BS; means for monitoring a WUS from the BS during a wake-up signal WUS opportunity; means for determining that the WUS is not received from the BS during the WUS opportunity; as well as Means for performing the following operations based on the default wake-up configuration: skipping Physical Downlink Control Channel (PDCCH) monitoring for a duration associated with the WUS opportunity; or PDCCH monitoring for a duration associated with the WUS opportunity.

38. The device according to claim 37, wherein The duration associated with the WUS opportunity includes one or more DRX on-durations associated with the WUS opportunity.

39. The device according to claim 37, wherein: The means for receiving the default wake-up configuration comprises: Means for receiving the default wake-up configuration from the BS via Radio Resource Control (RRC) signaling.

40. The apparatus of claim 37, wherein: The means for receiving the default wake-up configuration comprises: Means for receiving the default wake-up configuration from the BS via PDCCH signaling.

41. The apparatus of claim 37, wherein: The means for receiving the default wake-up configuration comprises: Means for receiving the default wake-up configuration from the BS via Medium Access Control (MAC) Control Element (CE) signaling.

42. The apparatus of claim 37, wherein: The means for receiving the default wake-up configuration comprises: Means for receiving, from the BS, the default wake-up configuration with an indication to operate in a first wake-up configuration or to operate in a second wake-up configuration, the second wake-up configuration being different from the first wake-up configuration.

43. The apparatus of claim 42, further comprising: means for operating using said first wake-up configuration during a first time period; as well as Means for operating using the second wake-up configuration during a second time period.

44. The device according to claim 43, wherein The means for operating using the first wake-up configuration during the first time period comprises: Means for operating using the first wake-up configuration during the first time period based on a timer.

45. The apparatus of claim 37, wherein: The means for receiving the default wake-up configuration comprises: Means for receiving the default wake-up configuration with an indication of aperiodic channel state reference signal, A-CSI-RS, triggering, reduced PDCCH monitoring from the BS.

46. ​​The apparatus of claim 37, wherein: The means for receiving the default wake-up configuration comprises: Means for receiving the default wake-up configuration with an indication of reduced PDCCH monitoring from the BS.

47. The apparatus of claim 37, wherein: The means for receiving the default wake-up configuration comprises: Means for receiving the default wake-up configuration with an indication of bandwidth part (BWP) switching from the BS.

48. The apparatus of claim 37, wherein: The means for receiving the default wake-up configuration comprises: means for receiving the default wake-up configuration with an indication of waking up a secondary cell (Scell) from the BS.

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