Power saving enhancements using low power wake-up signals

Abstract

A method of wireless communication at a UE includes monitoring a low power wake-up signal (LP-WUS) from a network node based on satisfying at least one condition. The method also includes waking up to receive communications from the network node in response to receiving the LP-WUS.

Description

Technical Field

[0001] The present disclosure relates generally to communication systems and, more particularly, to wireless communications including paging. Background Art

[0002] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcast. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0003] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at city, national, regional, and even global levels. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with the Internet of Things (IoT)) and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Certain aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. Further improvements to 5G NR technology are needed. In addition, these improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the invention

[0004] A simplified summary of one or more aspects is presented below to provide a basic understanding of these aspects. This summary is not an extensive review of all contemplated aspects. This summary is neither intended to identify key or important elements of all aspects, nor to describe the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description presented later.

[0005] In one aspect of the present disclosure, a method, computer readable medium, and apparatus for wireless communication at a user equipment (UE) are provided. The apparatus monitors a low power wake-up signal (LP-WUS) from a network node based on satisfying at least one condition. The apparatus wakes up in response to receiving the LP-WUS to receive communications from the network node.

[0006] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication at a UE are provided. The apparatus receives a first wake-up signal (WUS) including an LP-WUS from a network node. The apparatus monitors a second WUS from the network node in response to receiving the LP-WUS.

[0007] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus for wireless communication at a network node are provided. The apparatus sends a first WUS including an LP-WUS for a UE. The apparatus sends a second WUS for the UE. The apparatus sends a paging to the UE after sending the LP-WUS and the second WUS.

[0008] In one aspect of the present disclosure, a method, computer-readable medium, and apparatus for wireless communication at a network node are provided. The apparatus obtains a request to use an LP-WUS from a UE. The apparatus sends an LP-WUS for the UE in response to having data to send to the UE and based at least in part on the request.

[0009] To achieve the aforementioned and related purposes, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail some exemplary features of one or more aspects. However, these features are only indicative of only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0011] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0012] Figure 2B is a diagram illustrating an example of DL channels within a subframe according to various aspects of the present disclosure.

[0013] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0014] Figure 2D is a diagram illustrating an example of UL channels within a subframe according to various aspects of the present disclosure.

[0015] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0016] Figure 4A An example diagram illustrating discontinuous reception (DRX) is shown.

[0017] Figure 4B , Figure 4C and Figure 4D An example of using a low power wake-up signal (LP-WUS) and a physical downlink control channel wake-up signal (PDCCH-WUS) for paging in a cell is illustrated.

[0018] Figure 5 is a diagram illustrating an example of utilizing LP-WUS in conjunction with PDCCH-WUS for paging in a cell.

[0019] Figure 6 is a diagram illustrating an example of using LP-WUS for selected UEs for paging in a cell.

[0020] Figure 7 is a diagram illustrating exemplary communications between a UE, a base station, and an access and mobility management function (AMF).

[0021] Figure 8 A flow chart of a wireless communication method.

[0022] Fig. 9 A flow chart of a wireless communication method.

[0023] Fig.10 A flow chart of a wireless communication method.

[0024] Fig.11 A flow chart of a wireless communication method.

[0025] Fig.12 is a diagram illustrating an example of a hardware implementation for an example apparatus and / or UE.

[0026] Fig.13 is a diagram illustrating an example of a hardware implementation for an example network entity.

[0027] Fig.14 is a diagram illustrating an example of a hardware implementation for an example network entity. DETAILED DESCRIPTION

[0028] The UE may be configured with resources, such as a PDCCH-WUS, for monitoring a wake-up signal (WUS). When configured, the UE wakes up a configurable amount of time before a discontinuous reception (DRX) cycle begins. The UE then uses the UE's primary radio to check for the WUS. If the UE does not receive the WUS, the UE returns to sleep for the next DRX cycle. Waking up the primary radio consumes UE power. The aspects presented herein enable the UE to receive LP-WUS in place of or in addition to the WUS, for example, the WUS may be referred to as a higher power WUS. In some aspects, the UE monitors the LP-WUS from a network node based on satisfying at least one condition (e.g., the UE's location within a cell, the UE's mobility state, a signal measurement associated with the LP-WUS, etc.). Relative to the higher power amount used to monitor the reception of the higher power WUS, the UE may use a reduced amount of power to monitor and receive the LP-WUS. The UE may wake up in response to receiving the LP-WUS to receive communications from the network node. Therefore, the UE may consume less power to monitor the LP-WUS than monitoring the higher power WUS. In some aspects, the UE receives a first WUS including an LP-WUS from a network node. The UE monitors a second WUS, e.g., a higher power WUS, from the network node in response to receiving the LP-WUS. Thus, the UE can take advantage of the benefits of the WUS (wide coverage) while also taking advantage of the potential for increased power savings based on the LP-WUS (e.g., lower UE power consumption monitoring the LP-WUS).

[0029] The detailed description set forth below in conjunction with the accompanying drawings is a description of various configurations and does not represent the only configurations with which the concepts described herein can be practiced. In order to provide a thorough understanding of the various concepts, the specific embodiments include specific details. However, these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0030] Several aspects of the telecommunication system are also presented with reference to various apparatus and methods. These apparatus and methods are described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether these elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0031] As an example, an element or any part of an element or any combination of elements can be implemented as a "processing system", which includes one or more processors. The example of a processor includes a microprocessor, a microcontroller, a graphics processing unit (GPU), a central processing unit (CPU), an application processor, a digital signal processor (DSP), a reduced instruction set computing (RISC) processor, a system on a chip (SoC), a baseband processor, a field programmable gate array (FPGA), a programmable logic device (PLD), a state machine, a gate logic piece, a discrete hardware circuit and other suitable hardware configured to perform various functionalities described throughout the present disclosure. One or more processors in a processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other terms, software should be broadly interpreted as meaning an instruction, an instruction set, a code, a code segment, a program code, a program, a subroutine, a software component, an application, a software application, a software package, a routine, a subroutine, an object, an executable, a thread of execution, a process, a function or any combination thereof.

[0032] Therefore, in one or more example aspects, specific implementations and / or use cases, the described functions may be implemented with hardware, software, or any combination thereof. If implemented with software, the functions may be stored or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. Storage media may be any available medium that can be accessed by a computer. By way of example, such computer-readable media may include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of these types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0033] Although various aspects, specific implementations and / or use cases are described in this application by the illustration of some examples, additional or different aspects, specific implementations and use cases may be generated in many different arrangements and scenarios. The various aspects, specific implementations and / or use cases described herein can be implemented across many different platform types, devices, systems, shapes, sizes and packaging arrangements. For example, aspects, specific implementations and / or use cases can be generated via integrated chip specific implementations and other devices based on non-module components (e.g., end-user equipment, vehicles, communication equipment, computing equipment, industrial equipment, retail / purchase equipment, medical equipment, artificial intelligence (AI) enabled devices, etc.). Although some examples may be specifically for use cases or applications, or may not be specifically for use cases or applications, the described examples may have a wide range of applicability. Aspects, specific implementations and / or use cases may be in the range from chip-level or modular components to non-modular, non-chip-level specific implementations, and further to the range of aggregated, distributed or original equipment manufacturer (OEM) devices or systems in conjunction with one or more technologies herein. In some practical environments, the equipment in conjunction with the various aspects and features described may also include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals necessarily include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / accumulators, etc.) The techniques described herein can be practiced in a wide variety of devices of various sizes, shapes, and configurations, chip-level components, systems, distributed arrangements, aggregated or disaggregated components, end-user devices, etc.

[0034] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or a network equipment (such as a base station (BS), or one or more units (or one or more components) that perform base station functionality can be implemented in an aggregated architecture or a decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB (e.g., which may be referred to as a gNB), an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0035] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may be implemented as a virtual unit, i.e., a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0036] Base station operation or network design may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configuration such as that initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Various units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0037] Figure 1 1 is a diagram 100 illustrating an example of a wireless communication system and an access network. The illustrated wireless communication system includes a disaggregated base station architecture. The disaggregated base station architecture may include one or more CUs 110 that may communicate directly with a core network 120 via a backhaul link, or indirectly with the core network 120 through one or more disaggregated base station units, such as a near real-time (near RT) RAN intelligent controller (RIC) 125 via an E2 link, or a non-real-time (non-RT) RIC 115 associated with a service management and orchestration (SMO) framework 105, or both. The CU 110 may communicate with one or more DUs 130 via corresponding midhaul links, such as an F1 interface. The DU 130 may communicate with one or more RUs 140 via corresponding fronthaul links. The RU 140 may communicate with corresponding UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 140.

[0038] Each of the units (i.e., CU 110, DU 130, RU 140, and near-RT RIC 125, non-RT RIC 115, and SMO framework 105) may include or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units or an associated processor or controller that provides instructions to the communication interface of the unit may be configured to communicate with one or more of the other units via a transmission medium. For example, a unit may include a wired interface configured to receive or send signals to one or more of the other units on a wired transmission medium. Additionally, the units may include a wireless interface that may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive or send signals, or both, to one or more of the other units on a wireless transmission medium.

[0039] In some aspects, CU 110 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 110. CU 110 may be configured to handle user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 110 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 110 may be implemented to communicate with DU 130 for network control and signaling.

[0040] DU 130 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 140. In some aspects, DU 130 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) depending at least in part on a functional split such as that defined by 3GPP. In some aspects, DU 130 may also host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 130 or with control functions hosted by CU 110.

[0041] The lower layer functionality may be implemented by one or more RUs 140. In some deployments, the RU 140 controlled by the DU 130 may correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.), or both, based at least in part on functional splitting (such as lower layer functional splitting). In such an architecture, the RU 140 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some specific implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 140 may be controlled by the corresponding DU 130. In some scenarios, this configuration may enable the implementation of the DU 130 and the CU 110 in a cloud-based RAN architecture (such as a vRAN architecture).

[0042] The SMO framework 105 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 105 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 105 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 190) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 110, DU 130, RU 140, and near-RT RIC 125. In some specific implementations, the SMO framework 105 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 111) via the O1 interface. Additionally, in some specific implementations, the SMO framework 105 may communicate directly with one or more RUs 140 via the O1 interface. The SMO framework 105 may also include a non-RT RIC 115 configured to support the functionality of the SMO framework 105 .

[0043] The non-RT RIC 115 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence (AI) / machine learning (ML) (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 125. The non-RT RIC 115 may be coupled to or communicate with the near-RT RIC 125 (such as via an A1 interface). The near-RT RIC 125 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 110, one or more DUs 130, or both, and the O-eNB with the near-RT RIC 125.

[0044] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 125, the non-RT RIC 115 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 125 and may be received from a non-network data source or from a network function at the SMO framework 105 or the non-RT RIC 115. In some examples, the non-RT RIC 115 or the near-RT RIC 125 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 115 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 105 (such as via reconfiguration of O1) or via the creation of RAN management policies (such as A1 policies).

[0045] At least one of the CU 110, the DU 130, and the RU 140 may be referred to as a base station 102. Therefore, the base station 102 may include one or more of the CU 110, the DU 130, and the RU 140 (each component is indicated by a dotted line to indicate that each component may be included in the base station 102, or may not be included in the base station). The base station 102 provides an access point to the core network 120 for the UE 104. The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). Small cells include femto cells, pico cells, and micro cells. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group referred to as a closed subscriber group (CSG). The communication link between RU 140 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to RU 140 and / or downlink (DL) (also known as forward link) transmission from RU 140 to UE 104. The communication link may use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmission diversity. The communication link may be through one or more carriers. For each carrier allocated in a carrier aggregation of up to Yx MHz (x component carriers) for transmission in each direction, the base station 102 / UE 104 may use a spectrum of up to Y MHz (e.g., 5MHz, 10MHz, 15MHz, 20MHz, 100MHz, 400MHz, etc.) bandwidth. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric for DL ​​and UL (e.g., more or fewer carriers may be allocated for DL ​​compared to UL). The component carrier may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0046] Some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL wireless wide area network (WWAN) spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through a variety of wireless D2D communication systems, such as Bluetooth, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0047] The wireless communication system may also include a Wi-Fi AP 150 that communicates with a UE 104 (also referred to as a Wi-Fi station (STA)) via a communication link 154, for example, in a 5 GHz unlicensed spectrum, etc. When communicating in an unlicensed spectrum, the UE 104 / AP 150 may perform a clear channel assessment (CCA) to determine whether a channel is available prior to communication.

[0048] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band in various documents and articles. A similar naming issue sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) that is identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0049] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125 GHz–24.25 GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and therefore can effectively extend the features of FR1 and / or FR2 to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6 GHz–71 GHz), FR4 (71 GHz–114.25 GHz), and FR5 (114.25 GHz–300 GHz). Each of these higher frequency bands falls within the EHF band.

[0050] In view of the above, unless otherwise specified, if the term "6 GHz or less" is used in this document, it can broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specified, if the term "millimeter wave" is used in this document, it can broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR2-2 and / or FR5, or may be within the EHF band.

[0051] The base station 102 and the UE 104 may each include multiple antennas (such as antenna elements, antenna panels, and / or antenna arrays) to facilitate beamforming. The base station 102 may send a beamformed signal 182 to the UE 104 in one or more transmit directions. The UE 104 may receive the beamformed signal from the base station 102 in one or more receive directions. The UE 104 may also send a beamformed signal 184 to the base station 102 in one or more transmit directions. The base station 102 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 102 / UE 104 may perform beam training to determine the best receive direction and transmit direction for each of the base station 102 / UE 104. The transmit direction and receive direction of the base station 102 may be the same or different. The transmit direction and receive direction of the UE 104 may be the same or different.

[0052] The base station 102 may include and / or be referred to as a gNB, a Node B, an eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), a transmit receive point (TRP), a network node, a network entity, a network equipment, or some other suitable term. The base station 102 may be implemented as an integrated access backhaul (IAB) node, a relay node, a sidelink node, an aggregated (monolithic) base station with a baseband unit (BBU) (including a CU and a DU) and a RU, or as a disaggregated base station including one or more of a CU, a DU, and / or a RU. A set of base stations that may include disaggregated base stations and / or aggregated base stations may be referred to as a next generation (NG) RAN (NG-RAN).

[0053] The core network 120 may include an access and mobility management function (AMF) 161, a session management function (SMF) 162, a user plane function (UPF) 163, a unified data management (UDM) 164, one or more location servers 168, and other functional entities. AMF 161 is a control node that handles signaling between UE 104 and core network 120. AMF 161 supports registration management, connection management, mobility management, and other functions. SMF 162 supports session management and other functions. UPF 163 supports packet routing, packet forwarding, and other functions. UDM 164 supports the generation of authentication and key agreement (AKA) credentials, user identity handling, access authorization, and subscription management. One or more location servers 168 are illustrated as including a gateway mobile location center (GMLC) 165 and a location management function (LMF) 166. However, in general, the one or more location servers 168 may include one or more location / positioning servers, which may include one or more of the GMLC 165, the LMF 166, the positioning determination entity (PDE), the serving mobile location center (SMLC), the mobile positioning center (MPC), etc. The GMLC 165 and the LMF 166 support UE location services. The GMLC 165 provides an interface for clients / applications (e.g., emergency services) to access UE positioning information. The LMF 166 receives measurement results and assistance information from the NG-RAN and the UE 104 via the AMF 161 to calculate the positioning of the UE 104. The NG-RAN may determine the positioning of the UE 104 using one or more positioning methods. Positioning the UE 104 may involve signal measurements, positioning estimates, and optional speed calculations based on the measurements. Signal measurements may be performed by the UE 104 and / or the serving base station 102. The measured signals may be based on a satellite positioning system (SPS) 170 (e.g., one or more of a global navigation satellite system (GNSS), a global positioning system (GPS), a non-terrestrial network (NTN), or other satellite positioning / location systems), LTE signals, wireless local area network (WLAN) signals, Bluetooth signals, a terrestrial beacon system (TBS), sensor-based information (e.g., an atmospheric pressure sensor, a motion sensor), an NR enhanced cell ID (NR E-CID) method, NR signals (e.g., multi-round trip time (multi-RTT), DL angle of departure (DL-AoD), DL time difference of arrival (DL-TDOA), UL time difference of arrival (UL-TDOA), and UL angle of arrival (UL-AoA) positioning), and / or one or more of other systems / signals / sensors.

[0054] Examples of UE 104 include cellular phones, smart phones, session initiation protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablet computers, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare equipment, implants, sensors / actuators, displays, or any other similarly functional devices. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). UE 104 may also be referred to as stations, mobile stations, subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals, mobile phones, user agents, mobile clients, clients, or some other suitable terminology. In some scenarios, the term UE may also be applied to one or more supporting devices, such as in a device cluster arrangement. One or more of these devices may access the network collectively and / or individually.

[0055] Reference again Figure 1 In some aspects, the UE 104 may include a paging receiver component 198 configured to monitor for a LP-WUS from a network node based on satisfying at least one condition and wake up in response to receiving the LP-WUS to receive communications from the network node. In some aspects, the UE 104 may include a paging receiver component 198 configured to receive a first WUS including a LP-WUS from the network node and monitor for a second WUS from the network node in response to receiving the LP-WUS. In some aspects, the base station 102 may include a paging component 199 configured to send a first WUS including a LP-WUS for the UE, send a second WUS for the UE, and send a page to the UE after sending the LP-WUS and the second WUS. In some aspects, the base station 102 may include a paging component 199 configured to obtain a request to use the LP-WUS from the UE and send the LP-WUS for the UE in response to having data to send to the UE and based at least in part on the request. Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar areas such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0056] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B FIG230 is a diagram illustrating an example of DL channels within a 5G NR subframe. Figure 2C FIG250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D FIG280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or may be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A , Figure 2C In the example provided, the 5G NR frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (most of which are DL), where D is DL, U is UL, and F can be used flexibly between DL / UL, and subframe 3 is configured with slot format 1 (all of which are UL). Although subframes 3 and 4 are shown as having slot formats 1 and 28, respectively, any particular subframe may be configured with any of the various available slot formats 0 to 61. Slot formats 0 and 1 are both DL and both UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. The slot format is configured for the UE by a received slot format indicator (SFI) (dynamically configured by DL control information (DCI) or semi-statically / statically configured by radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0057] FIG. 2A to FIG. 2D The frame structure is illustrated, and various aspects of the present disclosure may be applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10ms) may be divided into 10 subframes of the same size (1ms). Each subframe may include one or more time slots. A subframe may also include a microslot, which may include 7, 4 or 2 symbols. Each time slot may include 14 or 12 symbols, depending on whether the cyclic prefix (CP) is conventional or extended. For a conventional CP, each time slot may include 14 symbols, and for an extended CP, each time slot may include 12 symbols. The symbol on the DL may be a CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbol. The symbol on the UL may be a CP-OFDM symbol (for high throughput scenarios) or a discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbol (also known as a single carrier frequency division multiple access (SC-FDMA) symbol) (for power-limited scenarios; limited to single-stream transmission). The number of time slots within a subframe is based on the CP and parameter set. The parameter set defines the subcarrier spacing (SCS) and effectively defines the symbol length / duration, which is equal to 1 / SCS.

[0058]

[0059] For normal CP (14 symbols / slot), different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For extended CP, parameter set 2 allows 4 slots per subframe. Accordingly, for normal CP and parameter set μ, there are 14 symbols / slot and 2 μ timeslots / subframe. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is parameter set 0 to 4. Therefore, the subcarrier spacing for parameter set μ=0 is 15kHz, and the subcarrier spacing for parameter set μ=4 is 240kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIG. 2A to FIG. 2D An example of a parameter set μ=2 with a normal CP of 14 symbols per slot and 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is about 16.67 μs. Within a frame set, there may be one or more different bandwidth parts (BWPs) that are frequency-division multiplexed (see Figure 2B ). Each BWP may have a specific parameter set and CP (normal or extended).

[0060] A resource grid may be used to represent a frame structure. Each slot includes a resource block (RB) (also referred to as a physical RB (PRB)) extending over 12 consecutive subcarriers. The resource grid is divided into a plurality of resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0061] like Figure 2A As illustrated, some of the REs carry reference (pilot) signals (RS) for the UE. The RS may include a demodulation RS (DM-RS) (indicated as R for a particular configuration, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RS may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0062] Figure 2BExamples of various DL channels within a subframe of a frame are illustrated. A physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE including six RE groups (REGs), each REG including 12 consecutive REs in an OFDM symbol of an RB. A PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH candidates in a PDCCH search space (e.g., a common search space, a UE-specific search space) during a PDCCH monitoring moment on a CORESET, wherein the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies on the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of a specific subframe of a frame. The PSS is used by UE 104 to determine subframe / symbol timing and physical layer identification. A secondary synchronization signal (SSS) may be within symbol 4 of a specific subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the location of the DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as an SS block (SSB)). The MIB provides the number of RBs in the system bandwidth and the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information such as system information blocks (SIBs) that are not sent via the PBCH, and paging messages.

[0063] like Figure 2C As illustrated, some of the REs carry DM-RS (indicated as R for a particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may send a DM-RS for a physical uplink control channel (PUCCH) and a DM-RS for a physical uplink shared channel (PUSCH). The PUSCH DM-RS may be sent in the first or first two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent and depending on the specific PUCCH format used, the PUCCH DM-RS may be sent in different configurations. The UE may send a sounding reference signal (SRS). The SRS may be sent in the last symbol of a subframe. The SRS may have a comb structure, and the UE may send the SRS on one of the teeth of the comb. The SRS may be used by the base station for channel quality estimation to achieve frequency-dependent scheduling of the UL.

[0064] Figure 2DExamples of various UL channels within a subframe of a frame are illustrated. The PUCCH may be located at a position as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and / or negative ACKs (NACKs)). The PUSCH carries data and may additionally be used to carry a buffer status report (BSR), a power headroom report (PHR), and / or UCI.

[0065] Figure 3 370 is a block diagram of a base station 310 communicating with a UE 350 in an access network. In the DL, Internet Protocol (IP) packets may be provided to a controller / processor 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity verification), and handover support functions; RLC layer functionality associated with delivery of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0066] The transmit (TX) processor 316 and receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1 (which includes the physical (PHY) layer) may include error detection on the transport channel, forward error correction (FEC) coding / decoding of the transport channel, interleaving, rate matching, mapping to the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-order phase shift keying (M-PSK), M-order quadrature amplitude modulation (M-QAM)). The decoded and modulated symbols can then be divided into parallel streams. Subsequently, each stream can be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time domain and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially pre-coded to generate multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation schemes, as well as for spatial processing. Channel estimates may be derived from reference signals and / or channel state feedback sent by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318Tx. Each transmitter 318Tx may modulate a radio frequency (RF) carrier for transmission using a corresponding spatial stream.

[0067] At the UE 350, each receiver 354Rx receives a signal through its corresponding antenna 352. Each receiver 354Rx recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be merged into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier and the reference signal are recovered and demodulated by determining the most likely signal constellation point sent by the base station 310. These soft decisions can be based on channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by the base station 310. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.

[0068] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets. The controller / processor 359 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0069] Similar to the functionality described in conjunction with DL transmissions performed by the base station 310, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functionality associated with header compression / decompression and security (encryption, decryption, integrity protection, integrity verification); RLC layer functionality associated with delivery of upper layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0070] The TX processor 368 may use channel estimates derived by the channel estimator 358 from a reference signal or feedback sent by the base station 310 to select the appropriate coding and modulation schemes and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354Tx. Each transmitter 354Tx may modulate an RF carrier with a corresponding spatial stream for transmission.

[0071] UL transmissions are processed at the base station 310 in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318Rx receives a signal through its respective antenna 320. Each receiver 318Rx recovers information modulated onto an RF carrier and provides the information to the RX processor 370.

[0072] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport channels and logical channels, packet reassembly, decryption, header decompression, control signal processing to recover IP packets. The controller / processor 375 is also responsible for error detection using ACK and / or NACK protocols to support HARQ operations.

[0073] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to combine Figure 1 The paging receiver component 198 performs various aspects.

[0074] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to combine Figure 1 The paging component 199 performs various aspects.

[0075] In RRC idle and inactive states, radio resource management (RRM) and paging consume significant UE power. In one example, in RRM, the UE periodically performs layer 3 reference signal received power (L3-RSRP) measurements on SBSs sent by the UE's serving cell and the UE's neighboring cells. Such L3-RSPRP measurements consume power. In another example, in paging, the UE periodically monitors the paging time (PO) during each idle discontinuous reception (I-DRX) cycle. In DRX mode, the UE can use sleep and wake-up cycles (e.g., DRX off duration and DRX on duration) to discontinuously monitor the PDCCH channel. When the UE is in the RRC connected state, DRX may also be referred to as connected mode DRX (C-DRX). If the UE is in the RRC idle state, DRX may be referred to as I-DRX. In non-DRX mode, the UE monitors the PDCCH in each subframe to check whether there is available downlink data. Continuous monitoring of the PDCCH uses more battery power at the UE, and DRX saves battery power at the UE.

[0076] Figure 4A An example of a DRX cycle 400 is illustrated, which includes periodic ON durations during which the UE monitors the PDCCH and OFF durations during which the UE may not monitor the PDCCH. In some aspects, the OFF duration may be referred to as a DRX opportunity. During the OFF duration, the UE does not monitor the PDCCH. The UE may enter a sleep mode or a low power mode in which the UE minimizes power consumption by turning off RF functions and not detecting communications from a base station.

[0077] When the base station is about to send a communication to the UE, the base station may transmit a wake-up signal (WUS) to the UE before the paging time (PO). If the UE receives the WUS, the UE may wake up to prepare to receive communications during the PO. If the UE does not receive the WUS, the UE may return to sleep mode. The UE may be configured with resources to monitor the WUS. When such resources are configured, the UE wakes up a configurable amount of time before the start of a long discontinuous reception (DRX) cycle and checks (e.g., monitors) the WUS. If the UE does not receive the WUS, the UE returns to sleep for the next long DRX cycle. The WUS may reduce the power consumption of the UE. In some configurations, the WUS may be sent over the PDCCH (such a wake-up signal may be referred to as a PDCCH-WUS).

[0078] In some configurations, the UE may be equipped with a low power wake-up radio (LP-WUR) that uses less battery power than another radio (e.g., a primary radio) of the UE. In one example, the LP-WUR may utilize less than 1 mA. The LP-WUR may be configured to receive a low power wake-up signal (LP-WUS). A UE utilizing the LP-WUS for wake-up purposes may consume less power than a UE utilizing the PDCCH-WUS for wake-up purposes. The LP-WUS may utilize a simplified modulation scheme (e.g., which may be referred to as a higher power WUS) compared to the WUS. As an example, the LP-WUS may be based on an off-keying (OOK) modulation scheme. The OOK modulation scheme may result in a smaller payload size for the LP-WUS. Various aspects presented herein provide for use of the LP-WUS in different contexts and / or according to different criteria in order to reduce UE power consumption.

[0079] To address issues related to UE power consumption, enhancements to the UE paging process are described herein. In some aspects, LP-WUS may have increased sensitivity compared to WUS such as PDCCH WUS. A large number of LP-WUS repetitions may be used to provide a coverage level similar to that of a paging channel. The increased repetitions may use additional radio resources and may cause the UE to wake up more frequently to monitor the LP-WUS. LP-WUS may have a reduced payload compared to WUS such as PDCCH. In one aspect, a base station may transmit a wake-up indication to the UE in both LP-WUS and PDCCH-WUS, and the UE may choose whether to monitor LP-WUS and / or PDCCH WUS, for example, based on conditions at the UE. This enables the UE to save power in some cases by monitoring LP-WUS using a low-power receiver without adding signaling overhead to inform the network of the specific WUS that the UE will monitor. In another aspect, a UE located near the edge of a cell may be configured to utilize PDCCH-WUS, and a UE not located near the edge of a cell may be configured to utilize LP-WUS. Different configurations may enable UEs that are closer to the base station to save power by monitoring LP-WUS while enabling better coverage of UEs at the edge of the cell. The use of different configurations may enable the base station to use fewer resources by sending LP-WUS instead of PDCCH-WUS to UEs that are closer to the base station. On the other hand, each UE in the cell may be configured to utilize both LP-WUS and PDCCH-WUS in a two-stage wake-up process. On the other hand, some UEs in the cell (e.g., power-sensitive UEs, UEs with low paging probability, etc.) may be configured to utilize LP-WUS, while other UEs may not be configured to monitor LP-WUS. The use of two-stage wake-up may improve WUS coverage through the second stage WUS while enabling UEs that do not receive the first stage WUS to avoid waking up higher power receivers. By using LP-WUS, UE power consumption may be reduced.

[0080] In one example, the UE monitors for LP-WUS from a network node based on satisfying at least one condition. In response to receiving the LP-WUS, the UE wakes up to receive communications from the network node. By monitoring the LP-WUS (as opposed to the PDCCH-WUS) based on satisfying at least one condition (e.g., the UE's location within a cell, the UE's mobility state, etc.), UE power consumption may be reduced. In another example, the UE receives the LP-WUS from the network node. The UE monitors the WUS from the network node in response to receiving the LP-WUS. The WUS may be referred to as a higher power WUS, which refers to a higher power usage at the UE for receiving the WUS. The higher power WUS may include a more complex modulation scheme than the LP-WUS, and receiving / decoding the higher power WUS may use more power or a higher power receiver at the UE. In one example, the higher power WUS may be a PDCCH-WUS. By first monitoring the WUS after receiving the LP-WUS, the UE may be able to achieve power consumption savings associated with the LP-WUS while still utilizing the wider coverage of the higher power WUS.

[0081] Figure 4B , Figure 4C and Figure 4D Example aspects of utilizing LP-WUS and PDCCH-WUS for paging in a cell are illustrated. Figure 4BA first configuration 402 is illustrated in which the network transmits both LP-WUS and PDCCH-WUS for a UE, for example, without distinguishing between UEs closer to a cell edge and UEs closer to a base station. In the first configuration 402, a base station (e.g., base station 102, base station 310) sends LP-WUS and PDCCH-WUS to a first UE 404 and a second UE 406 to indicate that the base station will transmit information about the UE in a paging frame (PF). The first UE 404 and the second UE 406 may each determine, for example, which type of WUS to utilize for a particular paging moment. For example, the first UE 404 may decide to utilize LP-WUS, and the second UE 406 may decide to utilize PDCCH-WUS. In an example, the first UE 404 and the second UE 406 may select LP-WUS or PDCCH-WUS based on conditions experienced at the UE, such as measured reference signal received power (RSRP) relative to an RSRP threshold. If the UE measures an RSRP equal to or higher than an RSRP threshold for a signal received from a base station, the UE may monitor LP-WUS instead of PDCCH-WUS. If the UE measures an RSRP lower than an RSRP threshold, the UE may monitor PDCCH-WUS instead. In some aspects, the UE may determine whether to monitor LP-WUS or PDCCH-WUS based on the location of the UE within the cell, for example, monitoring LP-WUS when the UE is closer to the center of the cell and monitoring PDCCH-WUS when the UE is closer to the edge of the cell. In some aspects, the UE may determine whether to monitor LP-WUS or PDCCH-WUS based on the mobility state of the UE, for example, monitoring LP-WUS when the UE has low mobility or is stationary and monitoring PDCCH-WUS when the UE has a higher mobility state.

[0082] Figure 4C A second configuration 408 is illustrated in which the base station sends LP-WUS to UEs that meet one or more criteria and sends PDCCH-WUS to other UEs. Figure 4B As described above, the condition may be based on RSRP measurements reported by the corresponding UE, the location of the UE within the cell, the mobility state of the UE, etc. In the second configuration 408, as Figure 4DAs shown in FIG. 4 , a cell 410 includes an LP-WUS region 412 located near or around the center of the cell 410 and a PDCCH-WUS region 414 located closer to the edge of the cell 410 (e.g., at a greater distance from the base station). In an example involving a second configuration 408, a first UE 404 is located in the LP-WUS region 412 and a second UE 406 is located in the PDCCH-WUS region 414. In the second configuration 408, the base station may send the LP-WUS to a UE (e.g., the first UE 404) located in the LP-WUS region 412 (i.e., a UE not located near the cell edge). Additionally or alternatively, the base station sends the LP-WUS to a UE with low mobility or stationary, to a UE reporting an RSRP measurement above an RSRP threshold, or to a UE for which an uplink signal having an RSRP measurement above an RSRP threshold is measured by the base station. In the second configuration 408, the base station sends a PDCCH-WUS to UEs (eg, the second UE 406) that do not meet one or more criteria, such as UEs located in the PDCCH-WUS region 414 (ie, UEs located near a cell edge).

[0083] In one aspect, the LP-WUS region 412, the PDCCH-WUS region 414, and the low mobility UEs may be determined by criteria. Such criteria may include not at cell edge (NACE) criteria and low mobility criteria for RRM relaxation. In one aspect, when the UE does not meet the criteria for LP-WUS, the UE may fall back to using PDCCH-WUS or another type of paging. When fallback occurs, the UE may utilize non-access stratum (NAS) signaling to update the AMF of the core network (CN) about which type of paging process to utilize. In one aspect, the CN may assign different paging subgroups for LP-WUS and PDCCH-WUS to the UE. For example, due to the difference in the respective payload sizes of LP-WUS and PDCCH-WUS, the CN may configure different numbers of paging subgroups for LP-WUS and PDCCH-WUS.

[0084] In some aspects, the UE may request the use of LP-WUS, such as if the UE meets LP-WUS eligibility criteria, such as in conjunction with Figure 7 Describe in more detail.

[0085] Figure 55 is a diagram 500 illustrating an example of utilizing LP-WUS in conjunction with PDCCH-WUS for paging in a cell. As shown in diagram 500, a base station may send LP-WUS 502 and PDCCH-WUS 504 to a UE 506 within a cell 508 in a two-stage wake-up process. In some aspects, the two-stage wake-up process may be used for every UE, e.g., regardless of the UE's mobility, location, signal measurements. In other aspects, the two-state wake-up process may be used for a subset of UEs that meet one or more conditions. It may be performed without NAS signaling Figure 5 Examples in .

[0086] The two-stage wake-up process can utilize the relatively high repetition level of LP-WUS to ensure that the LP-WUS has the same or similar coverage as the PDCCH-WUS. For example, the base station may send the LP-WUS at a first periodicity, where the first periodicity is less than the second periodicity used by the base station to send the PDCCH-WUS. One or more POs may be aggregated in the LP-WUS to reduce the transmission periodicity. In one example, more than two POs may be aggregated in the LP-WUS to reduce the resources consumed by the UE. The granularity of the LP-WUS may be at the level of a PO or a PO set (rather than a paging subgroup as in the PDCCH-WUS). In one example, if any UE in a PO or a PO set has paging, the bit in the LP-WUS indicates wake-up. If the LP-WUS indicates that the UE in the PO or PO set is awake, the UE may then monitor other WUS to confirm whether it is fully awake to receive communications from the network. If the UE does not receive another WUS indicating that the network has paging for the UE, the UE may return to sleep mode.

[0087] Graph 500 includes a graph 510 of power versus time for a UE, illustrating an example of a two-stage wake-up process. During a first time period 512, the LP-WUR of the UE is powered on, while the PDCCH-WUS receiver and the primary radio are powered off. In one example, the UE receives an LP-WUS including a bit indicating wake-up. In one example, the LP-WUS covers all UEs in a group of ten POs. When the UE receives the LP-WUS, the UE powers on the PDCCH-WUS receiver for a second time period 514. As described above, the LP-WUS may include the aggregated POs. The LP-WUR and the primary radio are powered off during the second time period 514. As indicated in graph 510, when powered on, the PDCCH-WUS receiver may consume more power than the LP-WUR. Following the above example, the PDCCH-WUS may include information about which PO in the group of ten POs will have a paging message on it. When the UE receives the PDCCH-WUS, the UE may turn on the primary radio for paging reception for a third time period 516. The payload size of the PDCCH-WUS may be larger than the payload size of the LP-WUS. As indicated in graph 510, when powered up, the primary radio may consume more power than the PDCCH-WUS receiver. The PDCCH-WUS may provide confirmation to the UE that the network does have communications for the UE, and the PDCCH-WUS may carry additional information for the UE in addition to the information in the payload of the LP-WUS.

[0088] In one aspect, the UE may decide to ignore the PDCCH-WUS. For example, if the UE determines that the false paging alarm rate is below a threshold level (e.g., indicating that the reception of the LP-WUS was accurate in the past), the UE may skip monitoring of the PDCCH-WUS and continue to activate the primary radio when the UE receives the LP-WUS.

[0089] Figure 6 600 is a diagram illustrating an example of using LP-WUS for selected UEs for paging in a cell. In the configuration indicated by diagram 600, a base station (e.g., base station 102, base station 310) sends LP-WUS 602 and PDCCH-WUS 604 to selected UEs 606 within a cell 608. The selected UE 606 may be selected based on criteria such as power sensitivity and / or low paging probability or other criteria indicative of the UE type. The selected UE 606 may be assigned to a separate PF / PO set configured with resources for monitoring LP-WUS.

[0090] Diagram 600 illustrates a configuration 610 utilizing LP-WUS and PDCCH-WUS. In configuration 610, the base station sends LP-WUS to a first UE 612 in the cell. The first UE 612 is within the selected UE 606. In an example, the first UE 612 is power sensitive and / or has a low paging probability. In configuration 610, the base station sends PDCCH-WUS to a second UE 614, a third UE 616, and a fourth UE 618. The second UE 614, the third UE 616, and the fourth UE 618 are not within the selected UE 606.

[0091] In one aspect, the UE may transmit a request to the network (e.g., to the AMF of the CN) to use the LP-WUS using NAS. The AMF may grant or deny the request. The AMF may grant (or deny) the request based on certain factors, such as the UE's subscription, the UE's estimated paging probability, etc. The AMF may assign the UE to a paging subgroup specific to the LP-WUS.

[0092] The AMF transmits an indication to the UE as to whether the request is granted or rejected. When the request is granted, the UE determines a PO among the POs associated with LP-WUS. When the AMF transmits a paging notification to the base station (i.e., RAN), the paging notification includes an indication as to whether the UE uses LP-WUS. The base station may use LP-WUS in the SI to announce the location of the PO set. The set of POs with LP-WUS is disjoint from other POs. When the UE roams into a cell that does not support LP-WUS, the UE may fall back to monitoring POs that are not associated with LP-WUS (e.g., POs associated with PDCCH-WUS).

[0093] Figure 7700 is a diagram illustrating an example communication between a UE 708 and a network such as a base station 704 and an AMF 712. In some aspects, the UE 708 may include multiple receivers or radios. For example, the UE 708 may include a lower power radio 701 (or a low power receiver) and a higher power radio 703 (or a high power receiver). As shown in the diagram 700, at 702, the base station 704 (e.g., base station 102, base station 310, etc.) may provide a qualification criterion for the LP-WUS, such as broadcasting the criterion in system information (SI). In one example, the qualification criterion may include NACE and a low mobility criterion for RRM relaxation. In another example, the qualification criterion includes one or more of the following: RSRP of a downlink reference signal of a UE that meets a threshold, a location of the UE within a cell, a location of the UE within a cell, and / or a reception of an indication of a paging subgroup associated with the LP-WUS. At 706, the UE 708 (e.g., UE 104, UE 350, etc.) evaluates the qualification criterion. In some aspects, as shown at 710, if the UE 708 meets the eligibility criteria, the UE 708 may transmit a registration update request to the network (e.g., to the AMF 712 of the CN (e.g., the core network 120)) via the base station 704. For example, the UE 708 may transmit the registration update request to the AMF 712 via NAS signaling sent by the UE 708 to the base station 704. The registration update request may include a preferred WUS type (e.g., LP-WUS, PDCCH-WUS, a combination of LP-WUS and PDCCH-WUS, another WUS, no WUS, etc.) and an indication of whether sub-grouping is supported. In one example, the registration update request may include a request to use the LP-WUS when the eligibility criteria are met. In another example, the registration update request includes a request to first use the LP-WUS and then use the PDCCH-WUS in response to receiving the LP-WUS (two-stage wake-up). The UE may combine the WUS type with the PDCCH-WUS type. FIG. 4A to FIG. 4D , Figure 5 or Figure 6 The request may be transmitted using any of the examples described.

[0094] The network (e.g., the AMF 712 of the CN) may decide to grant the registration update request based on additional factors such as the type of the UE 708. The AMF 712 may accept the request based on the subscription of the UE 708 or the estimated paging probability of the UE 708. The AMF 712 of the CN may then assign a paging subgroup dedicated to the LP-WUS to the UE 708. At 714, the AMF 712 of the CN transmits a registration acceptance to the UE 708 (e.g., via NAS signaling). The registration acceptance includes a confirmation of the WUS type and an identifier of the paging subgroup. The registration acceptance may also indicate a PF or PO associated with the LP-WUS. In one aspect, if the registration update request is not accepted by the AMF 712 of the CN, or if the UE 708 does not meet the eligibility criteria, the UE 708 may transmit an indication to the AMF 712 of the CN to use the PDCCH-WUS (or another WUS) as a fallback.

[0095] In some aspects, the UE may determine to monitor the LP-WUS and / or PDCCH-WUS without transmitting a request to the network.

[0096] At 716, the UE 708 begins monitoring the LP-WUS (or LP-WUS) and / or the PDCCH-WUS (or PDCCH-WUS). For example, in one configuration, the UE 708 begins monitoring the LP-WUS. The UE may monitor the LP-WUS or the PDCCH-WUS, such as by FIG. 4B to FIG. 4D The UE in the Figure 5 As described above, the UE may monitor the LP-WUS and the PDCCH-WUS. The UE may monitor the LP-WUS and the PDCCH-WUS according to, for example, Figure 6 The described configuration is used to monitor the type of WUS.

[0097] At 718, the AMF 712 of the CN transmits a paging notification to the base station 704. The paging notification includes an indication of the WUS type of the UE 708 (e.g., LP-WUS, PDCCH-WUS, another wake-up signal, no WUS, etc.) and an identifier for the paging subgroup. At 720, the base station 704 sends a paging notification to the base station 704, for example, based on the paging notification received by the base station 704 through the AMF 712 of the CN and based on the combination of FIG. Figure 6 At 722, in response to receiving the LP-WUS or PDCCH-WUS, the UE 708 wakes up for communication. At 724, after the WUS offset, the base station 704 transmits a page (or data) to the UE 708.

[0098] On the other hand, at 716, the UE 708 first monitors the LP-WUS, and then monitors the PDCCH-WUS when the LP-WUS is received. When the PDCCH-WUS is received, at 722, the UE 708 wakes up for communication. At 724, after the WUS offset, the base station 704 transmits a page (or data) to the UE 708.

[0099] On the other hand, at 716, the UE 708 first monitors the LP-WUS, and then monitors the PDCCH-WUS when the LP-WUS is received. When the PDCCH-WUS is received, at 722, the UE 708 wakes up for communication. Subsequently, at 716, the UE 708 monitors and receives a second LP-WUS. At 722, the UE 708 wakes up to receive communication without monitoring the corresponding PDCCH-WUS based on the paging alert rate being below a threshold.

[0100] At 726, the UE 708 may determine that the WUS type is to be changed. For example, the UE 708 may determine that the UE 708 has moved from the center of the cell to the edge of the cell, and as a result, the PDCCH-WUS will be used instead of the LP-WUS. At 728, the UE 708 transmits another Registration Update Request to the AMF 712 of the CN, wherein the Registration Update Request includes the new (preferred) WUS type (which may be different from the preferred WUS type discussed at 710). At 730, the AMF 712 transmits another Registration Accept to the UE 708, including a confirmation of the new (preferred) WUS type.

[0101] Figure 8 800 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104, UE 350, device 1204). In an example, the method (including various configurations described below) may be performed by a paging receiver component 198. The method may be associated with various advantages for the UE, such as reduced UE power consumption while also providing improved LP-WUS coverage.

[0102] At 802, the UE monitors LP-WUS from a network node based on satisfying at least one condition. Figure 7 At 716, UE 708 monitors LP-WUS based on the evaluation of the eligibility criteria at 706. In another example, referring to FIG. 4B to FIG. 4D , when the UE is in the LP-WUS area 412, the UE may monitor the LP-WUS. Figure 6 , the UE can monitor the LP-WUS when it is selected (eg, in the selected UE 606). The monitoring can be performed, for example, by the paging receiver component 198.

[0103] At 804, the UE wakes up in response to receiving the LP-WUS to receive communications from the network node. Figure 7 At 722, UE 708 wakes up in response to receiving the LP-WUS. The wake-up may be performed by paging receiver component 198, for example.

[0104] In one configuration, the at least one condition is based on at least one of: RSRP of a downlink reference signal of the UE satisfying a threshold, a location of the UE within a cell, a mobility state of the UE, or receiving an indication for a paging subgroup associated with the LP-WUS. Figure 7 , at 706, UE 708 evaluates the eligibility criteria.

[0105] In one configuration, the UE may send a request to the network node to use the LP-WUS in response to at least one condition being met. Figure 7 At 710, the UE 708 transmits a registration update request that may include the eligibility criteria. In such a configuration, the UE may receive a response to the UE accepting the use of the LP-WUS, wherein the UE monitors the LP-WUS after receiving the response. For example, referring to Figure 7 , at 714, a registration acceptance is received.

[0106] In one configuration, the LP-WUS is the first WUS, and the UE may switch to monitoring the second WUS in response to at least one condition not being met. Figure 7 At 726, the UE 708 may change the WUS type in response to the evaluation of the eligibility criteria.

[0107] In one configuration, the UE may use a first receiver to monitor the LP-WUS and may use a second receiver that uses more power than the first receiver to monitor the second WUS. Figure 1 , the paging receiver component 198 can monitor LP-WUS via a first receiver (eg, such as 701 ) and monitor PDCCH-WUS via a second receiver (eg, such as 703 ), where the second receiver uses more power than the first receiver.

[0108] In one configuration, the UE may send an indication of a change to the second WUS to the network node in response to at least one condition not being met. Figure 7 At 728, the UE may send a registration update request in response to evaluating the eligibility criteria.

[0109] In one configuration, the second WUS may include a PDCCH-WUS. Figure 6, the first configuration 402, the second configuration 408, and the configuration 610 illustrate PDCCH WUS. In another example, reference Figure 7 , at 720, UE 708 may receive the PDCCH-WUS.

[0110] In one configuration, the UE may monitor for LP-WUS using a first receiver, wherein waking up to receive communications from the network node in response to receiving the LP-WUS includes waking up a second receiver that uses more power than the first receiver. Figure 1 , the paging receiver component 198 may include a first receiver for monitoring the LP-WUS and a second receiver that is awakened to receive communications, wherein the second receiver uses more power than the first receiver.

[0111] In one configuration, the UE may receive an indication from a network node to use a paging frame or paging instant associated with the LP-WUS, wherein the UE monitors the LP-WUS in response to the indication from the network node. Figure 7 At 714, UE 708 may receive an indication of using a paging frame or paging instant.

[0112] In one configuration, the indication may be received in a system information broadcast or in dedicated signaling. Figure 7 At 714, an indication may be received in a system information broadcast or in dedicated signaling.

[0113] In one configuration, the communication may include paging. Figure 7 , at 724, the UE receives the paging.

[0114] In one configuration, the communication may include data. For example, reference Figure 7 , at 724, the UE receives data.

[0115] Fig. 9 900 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104, UE 350, device 1204). In an example, the method (including various configurations described below) may be performed by a paging receiver component 198. The method may be associated with various advantages for the UE, such as reduced UE power consumption. At 902, the UE receives a first WUS including an LP-WUS from a network node. For example, referring to Figure 7 At 720, UE 708 may receive LP-WUS. In another example, referring to Figure 5 , at a first time period 512, the UE receives a LP-WUS.

[0116] At 904, the UE monitors a second WUS from the network node in response to receiving the LP-WUS. Figure 7 , at 720, UE 708 may receive PDCCH-WUS. In another example, reference Figure 5 , the UE receives the PDCCH-WUS during the second time period 514.

[0117] In one configuration, the UE may wake up in response to receiving the second WUS to receive communications from the network node. Figure 7 At 722, the UE may wake up in response to receiving the PDCCH-WUS to receive communications. Figure 5 , the UE wakes up the primary radio for paging reception during a third time period 516.

[0118] In one configuration, the LP-WUS may be used for multiple UEs associated with a PO or a set of POs, and a second WUS may be used for a subset of the multiple UEs associated with a paging subgroup. Figure 7 At 714, the registration acceptance may include PO (or PO set) related information and paging subgroup information.

[0119] In one configuration, the UE may receive a second LP-WUS, and the UE may wake up to receive a second communication from the network node based on the paging alert rate being below a threshold without monitoring the corresponding second WUS. Figure 7 At 716, the UE 708 may monitor for a subsequent LP-WUS, and at 722, the UE 708 may wake up to receive communications without monitoring for a corresponding PDCCH-WUS.

[0120] In one configuration, the second WUS may include a PDCCH-WUS. Figure 5 , showing a PDCCH-WUS. In another example, reference Figure 7 , at 720, UE 708 may receive the PDCCH-WUS.

[0121] Fig.10 1000 is a flow chart of a method of wireless communication. The method may be performed by a network node (e.g., base station 102, base station 310, network entity 1202). In an example, the method (including various configurations described below) may be performed by paging component 199. The method may be associated with various advantages of the network node, such as more efficient paging. At 1002, the network entity sends a first WUS including an LP-WUS for the UE. For example, referring to Figure 7 At 720 , the base station 704 may send a LP-WUS to the UE 708 .

[0122] At 1004, the network entity sends a second WUS to the UE. Figure 7At 720 , the base station 704 may send a PDCCH-WUS to the UE 708 .

[0123] At 1006, the network entity sends a page to the UE after sending the LP-WUS and the second WUS. Figure 7 At 724 , the base station 704 sends a page to the UE 708 .

[0124] In one configuration, the LP-WUS and the second WUS may include the same indication for the UE. Figure 7 , at 720, the LP-WUS and the second WUS may have the same indication.

[0125] In one configuration, the LP-WUS may include a first stage wake-up indication, and the second WUS may include a second stage indication. Figure 5 A two-stage wake-up process is shown.

[0126] In one configuration, the LP-WUS may be used for multiple UEs associated with a PO or a set of POs, and a second WUS may be used for a subset of the multiple UEs associated with a paging subgroup. Figure 7 At 714, the registration acceptance may include PO (or PO set) related information and paging subgroup information.

[0127] In one configuration, the second WUS may include a PDCCH-WUS. Figure 5 , showing a PDCCH-WUS. In another example, reference Figure 7 , at 720, the base station 704 sends a PDCCH-WUS.

[0128] Fig.11 1100 is a flow chart of a method of wireless communication. The method may be performed by a network node (e.g., base station 102, base station 310, network entity 1202). In an example, the method (including various configurations described below) may be performed by paging component 199. The method may be associated with various advantages of the network node, such as more efficient data communication. At 1102, the network node obtains a request from a UE to use LP-WUS. For example, referring to Figure 7 At 710, the base station 704 may obtain a registration update request from the UE 708.

[0129] At 1104, the network node sends a LP-WUS for the UE in response to having data to send to the UE and based at least in part on the request. Figure 7 At 720 , the base station 704 sends a LP-WUS to the UE 708 .

[0130] In one configuration, the network node may send a response to the UE accepting the use of the LP-WUS before sending the LP-WUS. Figure 7 , at 714, base station 704 sends a registration acceptance.

[0131] In one configuration, the network node may accept the request based on at least one of the UE's subscription or the UE's estimated paging probability. Figure 7 At 714, registration acceptance may be based on the subscription of UE 708 or the estimated paging probability.

[0132] In one configuration, the network node may assign the UE to a paging subgroup associated with the LP-WUS. Figure 7 At 714, the registration acceptance may include the paging subgroup ID.

[0133] In one configuration, the network node may send system information indicating the location of the paging time associated with the LP-WUS. Figure 7 At 714, the base station 704 may send system information including the location of the paging time associated with the LP-WUS.

[0134] In one configuration, the network node may receive a paging notification for the UE from a network component, the paging notification indicating the use of LP-WUS. Figure 7 , at 718, the base station 704 receives a paging notification from the AMF 712.

[0135] Fig.121200 is an example of a hardware implementation of an example device 1204. The device 1204 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the device 1204 may include a cellular baseband processor 1224 (also referred to as a modem) coupled to one or more transceivers 1222 (e.g., a cellular RF transceiver). The cellular baseband processor 1224 may include on-chip memory 1224'. In some aspects, the device 1204 may also include one or more subscriber identity module (SIM) cards 1220 and an application processor 1206 coupled to a secure digital (SD) card 1208 and a screen 1210. The application processor 1206 may include on-chip memory 1206'. In some aspects, the device 1204 may also include a Bluetooth module 1212, a WLAN module 1214, an SPS module 1216 (e.g., a GNSS module), one or more sensor modules 1218 (e.g., an atmospheric pressure sensor / altimeter; a motion sensor such as an inertial measurement unit (IMU), a gyroscope, and / or an accelerometer; light detection and ranging (LIDAR), radio-aided detection and ranging (RADAR), sound navigation and ranging (SONAR), a magnetometer, audio, and / or other technologies for positioning), an additional memory module 1226, a power source 1230, and / or a camera 1232. The Bluetooth module 1212, the WLAN module 1214, and the SPS module 1216 may include an on-chip transceiver (TRX) (or in some cases, only a receiver (RX)). The Bluetooth module 1212, the WLAN module 1214, and the SPS module 1216 may include their own dedicated antennas and / or communicate using an antenna 1280. The cellular baseband processor 1224 communicates with the UE 104 and / or with the RU associated with the network entity 1202 via one or more antennas 1280 through the transceivers 1221 and 1222. For example, as described in conjunction with Figure 7As described, the device may include a low-power transceiver 1221 that uses less power than the transceiver 1222. The cellular baseband processor 1224 and the application processor 1206 may each include a computer-readable medium / memory 1224', 1206', respectively. The additional memory module 1226 may also be considered a computer-readable medium / memory. Each computer-readable medium / memory 1224', 1206', 1226 may be non-transitory. The cellular baseband processor 1224 and the application processor 1206 are each responsible for general processing, including executing software stored on a computer-readable medium / memory. The software, when executed by the cellular baseband processor 1224 / application processor 1206, causes the cellular baseband processor 1224 / application processor 1206 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1224 / application processor 1206 when executing the software. The cellular baseband processor 1224 / application processor 1206 may be a component of the UE 350 and may include the memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. In one configuration, the device 1204 may be a processor chip (modem and / or application) and include only the cellular baseband processor 1224 and / or the application processor 1206, while in another configuration, the device 1204 may be the entire UE (e.g., see Figure 3 350) and includes additional modules of device 1204.

[0136] As discussed above, the paging receiver component 198 is configured to monitor for an LP-WUS from a network node based on satisfying at least one condition and wake up in response to receiving the LP-WUS to receive communications from the network node. As discussed above, the paging receiver component 198 is also configured to receive a first WUS including an LP-WUS from the network node and monitor a second WUS from the network node in response to receiving the LP-WUS. The paging receiver component 198 may be within the cellular baseband processor 1224, the application processor 1206, or both the cellular baseband processor 1224 and the application processor 1206. The paging receiver component 198 may be one or more hardware components that are specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. As shown, the device 1204 may include a variety of components configured for various functions. In one configuration, the device 1204 (and in particular the cellular baseband processor 1224 and / or the application processor 1206) includes a component for monitoring a LP-WUS from a network node based on satisfying at least one condition and a component for waking up in response to receiving the LP-WUS to receive communications from the network node. In one configuration, the device 1204 (and in particular the cellular baseband processor 1224 and / or the application processor 1206) includes a component for receiving a first WUS including an LP-WUS from a network node, and a component for monitoring a second WUS from a network node in response to receiving the LP-WUS. The device may be a paging receiver component 198 of the device 1204 configured to perform the functions recited by the component. As described above, the device 1204 may include a TX processor 368, an RX processor 356, and a controller / processor 359. Therefore, in one configuration, the component may be a TX processor 368, an RX processor 356, and / or a controller / processor 359 configured to perform the functions recited by the component.

[0137] Fig.131300 is a diagram illustrating an example of a hardware implementation for a network entity 1302. The network entity 1302 may be a BS, a component of a BS, or may implement BS functionality. The network entity 1302 may include at least one of a CU 1310, a DU 1330, or a RU 1340. For example, depending on the layer functionality handled by the paging component 199, the network entity 1302 may include a CU 1310; both the CU 1310 and the DU 1330; each of the CU 1310, the DU 1330, and the RU 1340; the DU 1330; both the DU 1330 and the RU 1340; or the RU 1340. The CU 1310 may include a CU processor 1312. The CU processor 1312 may include an on-chip memory 1312'. In some aspects, the CU 1310 may also include an additional memory module 1314 and a communication interface 1318. CU 1310 communicates with DU 1330 via a midhaul link, such as an F1 interface. DU 1330 may include a DU processor 1332. DU processor 1332 may include on-chip memory 1332'. In some aspects, DU 1330 may also include an additional memory module 1334 and a communication interface 1338. DU 1330 communicates with RU 1340 via a fronthaul link. RU 1340 may include a RU processor 1342. RU processor 1342 may include on-chip memory 1342'. In some aspects, RU 1340 may also include an additional memory module 1344, one or more transceivers 1346, an antenna 1380, and a communication interface 1348. RU 1340 communicates with UE 104. On-chip memory 1312 ', 1332 ', 1342 ' and additional memory modules 1314, 1334, 1344 can each be considered as a computer readable medium / memory. Each computer readable medium / memory can be non-transitory. Each of the processors 1312, 1332, 1342 is responsible for general processing, including executing software stored on the computer readable medium / memory. The software, when executed by the corresponding processor, enables the processor to perform the various functions described above. The computer readable medium / memory can also be used to store data manipulated by the processor when executing the software.

[0138] As discussed above, the paging component 199 is configured to send a first WUS including an LP-WUS for the UE, send a second WUS for the UE, and send a page to the UE after sending the LP-WUS and the second WUS. As discussed above, the paging component 199 is also configured to obtain a request to use the LP-WUS from the UE, and send the LP-WUS for the UE in response to having data to be sent to the UE and at least partially based on the request. The paging component 199 may be within one or more processors in the CU 1310, DU 1330, and RU 1340. The paging component 199 may be one or more hardware components that are specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination thereof. The network entity 1302 may include a variety of components configured for various functions. In one configuration, the network entity 1302 includes a component for sending a first WUS including an LP-WUS for the UE, a component for sending a second WUS for the UE, and a component for sending a page to the UE after sending the LP-WUS and the second WUS. In one configuration, the network entity 1302 includes a component for obtaining a request to use the LP-WUS from the UE and a component for sending the LP-WUS for the UE in response to having data to be sent to the UE and at least partially based on the request. The device may be a paging component 199 of the network entity 1302 configured to perform the functions recited by the components. As described above, the network entity 1302 may include a TX processor 316, an RX processor 370, and a controller / processor 375. Therefore, in one configuration, the component may be a TX processor 316, an RX processor 370, and / or a controller / processor 375 configured to perform the functions recited by the components.

[0139] Fig.141400 is an example of a hardware implementation for a network entity 1460. In one example, the network entity 1460 may be within the core network 120. The network entity 1460 may include a network processor 1412. The network processor 1412 may include an on-chip memory 1412'. In some aspects, the network entity 1460 may also include an additional memory module 1414. The network entity 1460 communicates with the CU 1402 directly (e.g., a backhaul link) or indirectly (e.g., through the RIC) via a network interface 1480. The on-chip memory 1412' and the additional memory module 1414 may each be considered a computer-readable medium / memory. Each computer-readable medium / memory may be non-transitory. The processor 1412 is responsible for general processing, including executing software stored on a computer-readable medium / memory. The software, when executed by the corresponding processor, enables the processor to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the processor when executing the software.

[0140] As discussed above, component 1490 is configured to perform any functionality associated with AMF 712 described herein. Component 1490 may be within processor 1412. Component 1490 may be one or more hardware components specifically configured to perform the process / algorithm, implemented by one or more processors configured to perform the process / algorithm, stored in a computer-readable medium so as to be implemented by one or more processors, or some combination thereof. Network entity 1460 may include multiple components configured for various functions. In one configuration, network entity 1460 includes components for receiving registration updates from UEs, sending registration acceptances from UEs, and sending paging notifications to network nodes. Components may be components 1490 of network entity 1460 configured to perform the functions recorded by the components.

[0141] The UE may be configured with a wake-up signal (WUS), such as a PDCCH-WUS. When configured, the UE wakes up for a configurable amount of time before a discontinuous reception (DRX) cycle begins. The UE then uses the UE's primary radio to check for the WUS. If the UE does not receive the WUS, the UE returns to sleep for the next DRX cycle. Waking up the primary radio consumes UE power. Aspects presented herein enable the UE to receive an LP-WUS in place of or in addition to a WUS (e.g., a PDCCH-WUS). In some aspects, the UE monitors the LP-WUS from a network node based on satisfying at least one condition. The at least one condition may include a reference signal received power (RSRP) of a downlink reference signal of the UE satisfying a threshold, the UE's location within a cell, the UE's mobility state, and / or the receipt of an indication of a paging subgroup associated with the LP-WUS. In response to receiving the LP-WUS, the UE wakes up to receive communications from the network node. Therefore, the UE may consume less power monitoring the LP-WUS than monitoring the WUS. In some aspects, the LP-WUS is a first WUS, and the UE switches to monitoring a second WUS in response to the at least one condition not being met. Thus, the at least one condition provides flexibility for the UE to use the LP-WUS or some other WUS (e.g., PDCCH-WUS). In some aspects, the UE receives a first WUS including the LP-WUS from a network node. In response to receiving the LP-WUS, the UE monitors a second WUS from the network node. Thus, the UE can take advantage of the benefits of a WUS (wide coverage) while also taking advantage of the benefits of the LP-WUS (lower UE power consumption).

[0142] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is only an illustration of the exemplary method. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart can be rearranged based on design preferences. In addition, some blocks can be combined or omitted. The attached method claims provide the elements of each block in a sample order, but are not limited to the specific order or hierarchy provided.

[0143] The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not limited to the various aspects described herein, but should be given the full scope consistent with the language claims. Unless otherwise specified, reference to an element in the singular form does not mean "one and only one", but "one or more". Terms such as "if", "when ..." and "at ..." do not mean a direct temporal relationship or reaction. That is, these phrases, such as "when ...", do not mean an instant action in response to the occurrence of an action or during the occurrence of an action, but only mean that if the condition is met, the action will occur without a specific or instantaneous time constraint to make the action occur. The word "exemplary" is used herein to mean "used as an example, instance, or illustration". Any aspect described as "exemplary" herein is not necessarily interpreted as being preferred or having an advantage over other aspects. Unless otherwise specified, the term "some" refers to one or more. Combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, combinations such as "at least one of A, B, or C," "one or more of A, B, or C," "at least one of A, B, and C," "one or more of A, B, and C," and "A, B, C, or any combination thereof" may be only A, only B, only C, A and B, A and C, B and C, or A and B and C, where any such combination may contain one or more members of A, B, or C. A set should be interpreted as a set of elements, where the number of elements is one or more. Thus, for a set of X, X will include one or more elements. If the first device receives data from the second device or sends data to the second device, the data may be received / sent directly between the first device and the second device, or indirectly between the first device and the second device through a collection of devices. All structural and functional equivalents of the elements of the various aspects described throughout the present disclosure that are known or will later be known to a person of ordinary skill in the art are expressly incorporated herein by reference and are covered by the claims. In addition, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly stated in the claims. Words such as "module", "mechanism", "element", "device", etc. cannot replace the word "component". Therefore, no claim element will be understood as a component plus function unless the element is explicitly stated using the phrase "component for..."

[0144] As used herein, the phrase "based on" should not be interpreted as referring to a closed set of information, one or more conditions, one or more factors, etc. In other words, the phrase "based on A" (where "A" can be information, a condition, a factor, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0145] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0146] Aspect 1 is a method of wireless communication at a UE, the method comprising monitoring a low power wake-up signal (LP-WUS) from a network node based on satisfying at least one condition; and waking up to receive communication from the network node in response to receiving the LP-WUS.

[0147] Aspect 2 is a method according to aspect 1, wherein the at least one condition is based on at least one of the following: a reference signal received power (RSRP) of a downlink reference signal of the UE satisfies a threshold, a location of the UE within a cell, a mobility state of the UE, or receiving an indication for a paging subgroup associated with the LP-WUS.

[0148] Aspect 3 is a method according to any one of Aspects 1 to 2, the method further comprising: sending a request to the network node to use the LP-WUS in response to satisfying the at least one condition; and receiving a response to the UE accepting the use of the LP-WUS, wherein the at least one processor is configured to monitor the LP-WUS after receiving the response.

[0149] Aspect 4 is a method according to any one of aspects 1 to 3, wherein the LP-WUS is the first WUS, the method further comprising: switching to monitoring the second (WUS) in response to the at least one condition not being met.

[0150] Aspect 5 is a method according to aspect 4, wherein the monitoring of the LP-WUS is performed using a first receiver, wherein the monitoring of the second WUS is performed using a second receiver, the second receiver using more power than the first receiver.

[0151] Aspect 6 is a method according to any one of aspects 1 to 5, the method further comprising: sending an indication of a change to the second WUS to the network node in response to the at least one condition not being met.

[0152] Aspect 7 is a method according to any one of aspects 4 to 6, wherein the second WUS comprises a physical downlink control channel wake-up signal (PDCCH-WUS).

[0153] Aspect 8 is a method according to any one of aspects 1 to 4 or 6 to 7, wherein monitoring of the LP-WUS is performed using a first receiver, wherein waking up in response to receiving the LP-WUS to receive communications from the network node includes waking up a second receiver that uses more power than the first receiver.

[0154] Aspect 9 is a method according to any one of aspects 1 to 8, the method further comprising: receiving an indication from the network node to use a paging frame or paging moment associated with the LP-WUS, and monitoring the LP-WUS in response to the indication from the network node.

[0155] Aspect 10 is a method according to any one of aspects 1 to 9, wherein the indication is included in a system information broadcast or in dedicated signaling.

[0156] Aspect 11 is a method according to any one of aspects 1 to 10, wherein the communication comprises paging.

[0157] Aspect 12 is a method according to any one of aspects 1 to 10, wherein the communication includes data.

[0158] Aspect 13 is an apparatus for wireless communication at a user equipment (UE), the apparatus comprising a memory and at least one processor, the at least one processor being coupled to the memory and configured to perform the method according to any one of aspects 1 to 12.

[0159] Aspect 14 is an apparatus for wireless communication, the apparatus comprising means for performing the method according to any one of aspects 1 to 12.

[0160] Aspect 15 is an apparatus according to aspect 13 or 14, the apparatus further comprising a first receiver configured to monitor the LP-WUS and a second receiver configured to wake up to receive the communication, wherein the second receiver uses more power than the first receiver.

[0161] Aspect 16 is the apparatus of aspect 15, wherein the LP-WUS is a first WUS, wherein the second receiver is further configured to monitor a second WUS.

[0162] Aspect 17 is a non-transitory computer-readable medium comprising instructions, which, when executed by a device, cause the device to perform the method according to any one of aspects 1 to 12.

[0163] Aspect 18 is a method for wireless communication at a user equipment (UE), the method comprising: receiving a first wake-up signal (WUS) including a low power wake-up signal (LP-WUS) from a network node; and monitoring a second WUS from the network node in response to receiving the LP-WUS.

[0164] Aspect 19 is a method according to aspect 18, the method further comprising: waking up to receive communications from the network node in response to receiving the second WUS.

[0165] Aspect 20 is a method according to aspect 19, wherein the communication comprises paging.

[0166] Aspect 21 is a method according to aspect 19, wherein the communication includes data.

[0167] Aspect 22 is a method according to any one of aspects 18 to 21, wherein the LP-WUS is used for multiple UEs associated with a paging moment (PO) or a PO set, and the second WUS is used for a subset of the multiple UEs associated with a paging subgroup.

[0168] Aspect 23 is a method according to any one of aspects 18 to 22, the method further comprising: receiving a second LP-WUS; and waking up to receive a second communication from the network node without monitoring the corresponding second WUS based on a paging alert rate being lower than a threshold.

[0169] Aspect 24 is a method according to aspect 23, wherein the second WUS comprises a physical downlink control channel wake-up signal (PDCCH-WUS).

[0170] Aspect 25 is an apparatus for wireless communication at a user equipment (UE), the apparatus comprising a memory and at least one processor coupled to the memory and configured to perform the method according to any one of aspects 18 to 24.

[0171] Aspect 26 is an apparatus for wireless communication, the apparatus comprising means for performing the method according to any one of aspects 18 to 24.

[0172] Aspect 27 is an apparatus according to aspect 25 or 26, the apparatus comprising a first receiver configured to monitor the first WUS including the LP-WUS and a second receiver configured to monitor the second WUS, wherein the second receiver uses more power than the first receiver.

[0173] Aspect 28 is the apparatus of aspect 27, wherein the second receiver is further configured to receive the communication from the network node in response to receiving the second WUS.

[0174] Aspect 29 is a non-transitory computer-readable medium comprising instructions which, when executed by an apparatus, cause the apparatus to perform the method according to any one of aspects 18 to 24.

[0175] Aspect 30 is a method for performing wireless communications at a network node, the method comprising: sending a first wake-up signal (WUS) including a low-power wake-up signal (LP-WUS) to a user equipment (UE); sending a second WUS to the UE, and sending a paging to the UE after sending the LP-WUS and the second WUS.

[0176] Aspect 31 is a method according to aspect 30, wherein the LP-WUS and the second WUS include the same indication for the UE.

[0177] Aspect 32 is a method according to any one of aspects 30 to 31, wherein the LP-WUS includes a first stage wake-up indication, and the second WUS includes a second stage indication.

[0178] Aspect 33 is a method according to any one of aspects 30 to 32, wherein the LP-WUS is used for multiple UEs associated with a paging moment (PO) or a PO set, and the second WUS is used for a subset of the multiple UEs associated with a paging subgroup.

[0179] Aspect 34 is a method according to any one of aspects 30 to 33, wherein the second WUS comprises a physical downlink control channel wake-up signal (PDCCH-WUS).

[0180] Aspect 35 is an apparatus for wireless communication at a network node, the apparatus comprising a memory and at least one processor, the at least one processor being coupled to the memory and configured to perform the method according to any one of aspects 30 to 34.

[0181] Aspect 36 is an apparatus for wireless communication, the apparatus comprising means for performing a method according to any one of aspects 30 to 34.

[0182] Aspect 37 is a non-transitory computer-readable medium comprising instructions which, when executed by an apparatus, cause the apparatus to perform the method according to any one of aspects 30 to 34.

[0183] Aspect 38 is a method of wireless communication at a network node, the method comprising: obtaining a request to use a low power wake-up signal (LP-WUS) from a user equipment (UE); and sending the LP-WUS to the UE in response to having data to be sent to the UE and based at least in part on the request.

[0184] Aspect 39 is a method according to aspect 38, the method further comprising: before sending the LP-WUS, sending a response to the UE accepting the use of the LP-WUS.

[0185] Aspect 40 is a method according to any one of aspects 38 to 39, the method further comprising accepting the request based on at least one of a subscription of the UE, an estimated paging probability of the UE.

[0186] Aspect 41 is a method according to any one of aspects 38 to 40, the method further comprising: assigning the UE to a paging subgroup associated with the LP-WUS.

[0187] Aspect 42 is a method according to any one of aspects 38 to 41, the method further comprising: sending system information indicating a location of a paging moment associated with the LP-WUS.

[0188] Aspect 43 is a method according to any one of aspects 38 to 42, the method further comprising: receiving a paging notification for the UE from a network component, the paging notification indicating the use of the LP-WUS.

[0189] Aspect 44 is an apparatus for wireless communication at a network node, the apparatus comprising a memory and at least one processor, the at least one processor coupled to the memory and configured to perform the method according to any one of aspects 38 to 43.

[0190] Aspect 45 is an apparatus for wireless communication, the apparatus comprising means for performing a method according to any one of aspects 38 to 43.

[0191] Aspect 46 is a non-transitory computer-readable medium comprising instructions which, when executed by an apparatus, cause the apparatus to perform a method according to any one of aspects 38 to 43.

[0192] Aspect 47 is an apparatus according to aspect 35 or 36, the apparatus further comprising at least one transceiver configured to send the first WUS, send the second WUS, and send the paging.

[0193] Aspect 48 is an apparatus according to aspect 44 or 45, the apparatus further comprising at least one transceiver configured to obtain the request and send the LP-WUS.

Claims

1. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: monitoring a low power wake-up signal (LP-WUS) from a network node based on satisfying at least one condition; and and waking up in response to receiving the LP-WUS to receive communications from the network node.

2. The apparatus of claim 1 , wherein the at least one condition is based on at least one of: The reference signal received power (RSRP) of the downlink reference signal of the UE meets the threshold, The location of the UE in the cell, the mobility state of the UE, or An indication of a paging subgroup associated with the LP-WUS is received.

3. The apparatus of claim 1 , wherein the at least one processor is further configured to: sending a request to the network node to use the LP-WUS in response to the at least one condition being satisfied; and A response is received to the UE accepting use of the LP-WUS, wherein the at least one processor is configured to monitor the LP-WUS after receiving the response.

4. The apparatus of claim 1 , wherein the LP-WUS is a first WUS, and wherein the at least one processor is further configured to: In response to the at least one condition not being met, switching to monitoring the second (WUS).

5. The device according to claim 4, further comprising: a first receiver; and a second receiver, wherein the second receiver uses more power than the first receiver, wherein the at least one processor is configured to monitor the LP-WUS using the first receiver and monitor the second WUS using the second receiver.

6. The apparatus of claim 4, wherein the at least one processor is further configured to: In response to the at least one condition not being satisfied, an indication of a change to the second WUS is sent to the network node.

7. The apparatus of claim 4, wherein the second WUS comprises a physical downlink control channel wake-up signal (PDCCH-WUS).

8. The device according to claim 1, further comprising: a first receiver; and a second receiver that uses more power than the first receiver, wherein the at least one processor is configured to monitor the LP-WUS using the first receiver and wake up to receive communications from the network node in response to receiving the LP-WUS includes waking up the second receiver.

9. The apparatus of claim 1 , wherein the at least one processor is further configured to: An indication is received from the network node to use a paging frame or paging instant associated with the LP-WUS, and the LP-WUS is monitored in response to the indication from the network node.

10. The apparatus of claim 9, wherein the indication is included in a system information broadcast or in dedicated signaling.

11. The apparatus of claim 1, wherein the communication comprises a page.

12. The apparatus of claim 1, wherein the communication comprises data.

13. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: receiving a first wake-up signal (WUS) comprising a low power wake-up signal (LP-WUS) from a network node; and In response to receiving the LP-WUS, monitoring for a second WUS from the network node.

14. The apparatus of claim 13, wherein the at least one processor is further configured to: and waking up to receive communications from the network node in response to receiving the second WUS.

15. The apparatus of claim 14, wherein the communication comprises a page.

16. The apparatus of claim 14, wherein the communication comprises data.

17. The apparatus of claim 13, wherein the LP-WUS is for a plurality of UEs associated with a paging occasion (PO) or a PO set, and the second WUS is for a subset of the plurality of UEs associated with a paging subgroup.

18. The apparatus of claim 13, wherein the at least one processor is further configured to: receiving a second LP-WUS; and Waking up to receive a second communication from the network node without monitoring a corresponding second WUS based on the paging alert rate being below a threshold.

19. The apparatus of claim 13, wherein the second WUS comprises a physical downlink control channel wake-up signal (PDCCH-WUS).

20. An apparatus for wireless communication at a network node, the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: sending a first wake-up signal (WUS) including a low power wake-up signal (LP-WUS) for a user equipment (UE); sending a second WUS directed to the UE; as well as A paging is sent to the UE after sending the LP-WUS and the second WUS.

21. The apparatus of claim 20, wherein the LP-WUS and the second WUS include the same indication for the UE.

22. The apparatus of claim 20, wherein the LP-WUS comprises a first stage wake-up indication and the second WUS comprises a second stage indication.

23. The apparatus of claim 20, wherein the LP-WUS is for a plurality of UEs associated with a paging occasion (PO) or a PO set, and the second WUS is for a subset of the plurality of UEs associated with a paging subgroup.

24. The apparatus of claim 20, wherein the second WUS comprises a physical downlink control channel wake-up signal (PDCCH-WUS).

25. An apparatus for wireless communication at a network node, the apparatus comprising: Memory; and at least one processor coupled to the memory and based at least in part on the information stored in the memory, the at least one processor configured to: Obtaining a request to use a low power wake-up signal (LP-WUS) from a user equipment (UE); and The LP-WUS for the UE is sent in response to having data to send to the UE and based at least in part on the request.

26. The apparatus of claim 25, wherein the at least one processor is further configured to: Before sending the LP-WUS, a response to the UE accepting to use the LP-WUS is sent.

27. The apparatus of claim 25, wherein the at least one processor is further configured to: The request is accepted based on at least one of a subscription of the UE, an estimated paging probability of the UE.

28. The apparatus of claim 25, wherein the at least one processor is further configured to: The UE is assigned to a paging subgroup associated with the LP-WUS.

29. The apparatus of claim 28, wherein the at least one processor is further configured to: System information indicating the location of a paging time associated with the LP-WUS is transmitted.

30. The apparatus of claim 25, wherein the at least one processor is further configured to: A paging notification is received from a network component for the UE, the paging notification indicating use of the LP-WUS.

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