RX mode switching and fallback operation for low power wake-up receivers

Abstract

The UE may measure signal strength or signal quality of the serving cell. The UE may select whether to use an LP-WUR, a primary radio, or to use both the LP-WUR and the primary radio for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurement. The signal strength or the signal quality of the serving cell may be measured using the primary radio. The UE may receive an indication of at least one threshold from a network node. Whether to use the LP-WUR, the primary radio, or to use both the LP-WUR and the primary radio for the signal monitoring may be further selected based on the at least one threshold.

Description

Technical Field

[0001] The present disclosure relates generally to communication systems, and more particularly to signal monitoring using one or more of a wake-up receiver (WUR) and a main radio in a wireless communication system. 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 a city, country, region, and even global level. 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 communication (mMTC), and ultra-reliable low latency communication (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. 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 overview 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 neither identifies the key or important elements of all aspects, nor describes 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, a computer-readable medium, and an apparatus are provided. The apparatus may be a user equipment (UE). The apparatus may measure the signal strength or signal quality of a serving cell. The apparatus may select whether to use a low power-wake-up receiver (LP-WUR), a main radio component, or both the LP-WUR and the main radio component for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of a wake-up signal (WUS) monitoring, a synchronization signal block (SSB) monitoring, or a radio resource management (RRM) measurement.

[0006] 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 indicate only some of the various ways in which the principles of the various aspects can be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0008] Figure 2A is a diagram illustrating an example of a first frame according to various aspects of the present disclosure.

[0009] Figure 2B is a diagram illustrating an example of downlink (DL) channels within a subframe according to various aspects of the present disclosure.

[0010] Figure 2C is a diagram illustrating an example of a second frame according to various aspects of the present disclosure.

[0011] Figure 2D is a diagram illustrating an example of uplink (UL) channels within a subframe according to various aspects of the present disclosure.

[0012] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0013] Figure 4 is a block diagram illustrating example operations of a WUR at a UE according to one or more aspects.

[0014] Figure 5 is a diagram illustrating an example process for paging monitoring using WUS according to one or more aspects.

[0015] Figure 6 is a block diagram illustrating an example architecture of a WUR using a single-bit analog-to-digital (ADC) converter or comparator according to one or more aspects.

[0016] Figure 7 is an example diagram illustrating selecting a receiver for signal monitoring based on a received signal power / quality threshold in accordance with one or more aspects.

[0017] Figure 8 is an example diagram illustrating selecting a receiver for signal monitoring based on a serving cell signal level threshold for cell reselection according to one or more aspects.

[0018] Fig. 9 is a diagram illustrating an example multiplexing scheme in a scenario where both a primary radio and a WUR are used for signal monitoring according to one or more aspects.

[0019] Fig.10 is a diagram of a communication flow of a method of wireless communication according to one or more aspects.

[0020] Fig.11 is a flow chart of a method of wireless communication.

[0021] Fig.12 is a flow chart of a method of wireless communication.

[0022] Fig.13 are diagrams illustrating examples of hardware implementations for example apparatuses and / or network entities. DETAILED DESCRIPTION

[0023] A wake-up receiver (WUR) (also referred to as a wake-up radio) (e.g., LP-WUR) may be a simple companion radio receiver circuit designed to have lower energy consumption. Examples of LP-WUR may include a non-coherent envelope detector. In general, a WUR may not provide a communication range and / or communication quality comparable to that of a primary radio. For example, a primary radio may have better receiver sensitivity and interference suppression performance than a WUR. If activation of the primary radio (receiver) is based on whether a WUS is detected (e.g., if a WUS is detected, the primary radio is activated, and if a WUS is not detected, the primary radio is not activated), there may be a risk that the UE may not be able to properly wake up the primary radio when the UE moves out of the coverage area of ​​the WUS. For example, a network node may transmit a WUS; however, if the UE is at a cell edge, the WUR at the UE may not be able to detect the WUS.

[0024] According to one or more aspects, a UE may measure the signal strength or signal quality of a serving cell. The UE may choose whether to use an LP-WUR, a main radio component, or both the LP-WUR and the main radio component for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurement. Therefore, by using an appropriate receiver for signal monitoring, when the UE is at the edge of a cell, the UE will not miss any WUS and will not be unable to wake up the main radio component. In addition, by avoiding unnecessarily frequent waking up of the main radio component, power savings associated with the use of the WUR can be maintained. These aspects may be used even if the WUR uses a single-bit analog-to-digital converter (ADC) or a comparator.

[0025] The specific embodiments described below in conjunction with the accompanying drawings are descriptions of various configurations and do not represent the only configurations in 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 cases, well-known structures and components are shown in block diagram form to avoid blurring such concepts.

[0026] Several aspects of telecommunication systems are 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 may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0027] 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. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, 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 instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, or any combination thereof.

[0028] Thus, in one or more example aspects, specific implementations and / or use cases, the described functionality may be implemented in hardware, software, or any combination thereof. If implemented in software, the functionality 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 media that can be accessed by a computer. As an 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 media that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.

[0029] 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 / or 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, various 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 devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / purchase equipment, medical equipment, artificial intelligence (AI) enabled devices, etc.). Although some examples may or may not be specifically for use cases or applications, the described examples may have a wide range of applicability. Various 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 actual settings, the device combined with the various aspects and features described may also include additional components and features for implementing and practicing the claimed and described aspects. 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 / summers, etc.). The various 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.

[0030] 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 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 or decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, 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.

[0031] 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).

[0032] Base station operations or network design may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be utilized 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.

[0033] Figure 11 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.

[0034] Each of these 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 transmit signals, data, or information (collectively referred to as signals) via a wired transmission medium or a wireless transmission medium. Each of these units or an associated processor or controller that provides instructions to the communication interface of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, these units may include a wired interface configured to receive signals or transmit signals to one or more of the other units via a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive and / or transmit signals to one or more of the other units via a wireless transmission medium.

[0035] 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), or 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.

[0036] 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 or demodulation, etc.) at least in part according to a functional split such as those 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.

[0037] 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 or 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 communications and user plane communications with the RU 140 may be controlled by the corresponding DU 130. In some scenarios, this configuration may enable the DU 130 and the CU 110 to be implemented in a cloud-based RAN architecture (such as a vRAN architecture).

[0038] 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 to instantiate 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 .

[0039] 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 in communication 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 O-eNBs with the near-RT RIC 125.

[0040] 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 adjust 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).

[0041] 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 transmit diversity. The communication link may pass 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. These carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). Component carriers 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).

[0042] 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, for example, Bluetooth, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0043] 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.

[0044] 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 different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0045] 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 (7.125GHz-24.25GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, so the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR2-2 (52.6GHz-71GHz), FR4 (71GHz-114.25GHz) and FR5 (114.25GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

[0046] In view of the above, unless otherwise specified, if the term "sub-6 GHz" or the like is used in this document, it may 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" or the like is used in this document, it may 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.

[0047] 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 the best transmit direction for each of the base station 102 / UE 104. The transmit direction and the receive direction of the base station 102 may be the same or may not be the same. The transmit direction and the receive direction of the UE 104 may be the same or may not be the same.

[0048] 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 and 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 decomposed base station including one or more of a CU, a DU, and / or a RU. A set of base stations that may include decomposed base stations and / or aggregated base stations may be referred to as a next generation (NG) RAN (NG-RAN).

[0049] 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, LMF 166, positioning determination entity (PDE), serving mobile location center (SMLC) or mobile positioning center (MPC), etc. The GMLC 165 and 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 and assistance information from the NG-RAN and 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 these 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.

[0050] 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 constellation arrangement. One or more of these devices may access the network collectively and / or individually.

[0051] Reference again Figure 1 In certain aspects, the UE 104 may include a signal monitoring component 198 that may be configured to measure the signal strength or signal quality of a serving cell. The signal monitoring component 198 may be configured to select whether to use the LP-WUR, the main radio component, or both the LP-WUR and the main radio component for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurements. 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.

[0052] 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 2DFIG280 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) (wherein 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) (wherein 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 is flexible 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 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mix of DL, UL and flexible symbols. The UE is configured with the slot format through the received slot format indicator (SFI) (dynamically configured through DL control information (DCI) or semi-statically / statically configured through radio resource control (RRC) signaling). Note that the following description also applies to the 5G NR frame structure as TDD.

[0053] 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 equally sized subframes (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 normal or extended. For a normal 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) extended OFDM (DFT-s-OFDM) symbol (for power-constrained 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) (see Table 1). Symbol length / duration can be scaled by 1 / SCS.

[0054]

[0055] Table 1: Parameter set, SCS and CP

[0056] 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. Thus, for normal CP and parameter set μ, there are 14 symbols per slot and 2 per subframe. μ time slots. 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).

[0057] 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.

[0058] 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).

[0059] 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 opportunity 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 particular 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 particular 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 system bandwidth and the number of RBs in the system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information not sent over the PBCH (such as the system information block (SIB)), and paging messages.

[0060] 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.

[0061] 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.

[0062] Figure 3 370 is a block diagram of a base station 310 in an access network communicating with a UE 350. 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 (ciphering, deciphering, 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.

[0063] 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 coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time 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. The channel estimates from the channel estimator 374 may be used to determine the coding and modulation schemes, as well as for spatial processing. The channel estimates may be derived from a reference signal 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.

[0064] 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 stream destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be combined 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 base station 310. The data and control signals are then provided to controller / processor 359, which implements layer 3 and layer 2 functionality.

[0065] 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.

[0066] 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.

[0067] Channel estimates derived by the channel estimator 358 based on a reference signal or feedback sent by the base station 310 may be used by the TX processor 368 to select the appropriate coding and modulation schemes and 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.

[0068] 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.

[0069] 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.

[0070] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 The signal monitoring component 198 combines various aspects.

[0071] A WUR (also known as a wake-up radio component) (eg, LP-WUR) may be a simple companion radio receiver circuit designed to have lower energy consumption. An example of a LP-WUR may include a non-coherent envelope detector.

[0072] Figure 4 4 is a block diagram 400 illustrating example operations of a WUR at a UE according to one or more aspects. As shown, example 402 includes a main radio 404 and a WUR 406. Diagram 410 illustrates an example scenario in which UE 402 may not have data to receive. In diagram 410, main radio 404 may be turned off (or placed in a deep sleep state) unless UE 402 has data to send. When main radio 404 is turned off (or in a deep sleep state), WUR 406 (e.g., LP-WUR 406) may be active and may be used to monitor WUS 412 (e.g., low power WUS 412).

[0073] Diagram 450 illustrates an example scenario where UE 402 has data to receive. In diagram 450, WUR 406 may receive WUS 452 (e.g., on-demand low power WUS 452). Based on WUS 452, WUR 406 may send a trigger signal 454 to primary radio 404 to activate primary radio 404. After primary radio 404 is activated, UE 402 may use primary radio 404 to send and / or receive data.

[0074] Compared to some duty cycle-based schemes, WUR may be associated with lower energy consumption. Therefore, WUR may not be affected by the trade-off between latency and efficiency (e.g., unlike some duty cycle-based schemes). Specifically, since the power consumption at the WUR (e.g., LP-WUR) may be lower, WUS monitoring at the WUR may be performed frequently in order to meet the latency specification. In addition, by using WUR, unnecessary wake-up of the main radio component for PDCCH monitoring may be avoided (unnecessary wake-up of the main radio component may be costly in terms of power consumption). Therefore, the deployment of WUR and WUS may be applicable to IoT use cases or idle / inactive mode UEs (e.g., UEs in RRC idle or RRC inactive mode).

[0075] In addition to monitoring a WUS that may be targeted for paging reception (e.g., a low power WUS), the WUR may also be used to monitor a low power RS ​​(LP-RS) for time / frequency tracking (e.g., to maintain synchronization with the network) and / or RRM. By using LP-RS, serving cell monitoring may be transferred from the main radio to the WUR, and the frequency of the main radio wake-up may be reduced. Thus, power savings may be achieved.

[0076] Figure 5 5 is a diagram illustrating an example process of using a WUS for paging monitoring according to one or more aspects. In some configurations, the use of a WUS (e.g., LP-WUS) can help reduce the number of (unnecessary) paging receptions at a UE. If there is a paging for a UE in an idle mode (e.g., RRC idle mode) or an inactive mode (e.g., RRC inactive mode), the network can send an LP-WUS 516 at an LP-WUS opportunity 506. The time period between two adjacent LP-WUS opportunities 506 can correspond to a WUS monitoring period 508. When the UE detects the LP-WUS 516 via the LP-WUR 504, the UE can turn on the main radio 502. After the main radio wake-up time 510 has passed, the main radio 502 can monitor the SSB 512. The main radio 502 can achieve synchronization with the network based on the SSB 512. The UE can then receive a paging message at a paging opportunity (PO) 514. On the other hand, if the UE does not detect any LP-WUS, the UE may keep the main radio 502 in an off state or a deep sleep state (mode) in order to save power.

[0077] In one or more configurations, the LP-WUS 516 may be a message-based WUS. Specifically, the LP-WUS 516 may include a preamble 516a, a payload 516b, and a check code 516c such as a cyclic redundancy check (CRC). Specifically, the payload 516b may include addressing information. In some configurations, the payload 516b may include more than 1 bit. For example, the payload 516b may include a cell identifier (ID) for cell identification or UE addressing (e.g., UE ID) for paging (early) indication.

[0078] In one or more configurations, the LP-WUS 516 may be a sequence-based WUS (not shown). Specifically, the sequence-based LP-WUS may include a predefined set of sequences associated with a cell ID or a UE ID.

[0079] Generally speaking, the WUR may not provide a communication range and / or communication quality comparable to that of the primary radio. For example, the primary radio may have better receiver sensitivity and interference suppression performance than the WUR. If activation of the primary radio (receiver) is based on whether a WUS is detected (e.g., if a WUS is detected, the primary radio is activated, and if a WUS is not detected, the primary radio is not activated), there may be a risk that the UE may not be able to properly wake up the primary radio when the UE moves out of the coverage area of ​​the WUS. For example, a network node may transmit a WUS; however, if the UE is at the edge of a cell, the WUR at the UE may not be able to detect the WUS.

[0080] In order to ensure that the main radio component can be woken up even when the UE is at the edge of the cell, in one configuration, the UE may periodically wake up the main radio component even if the WUS is not detected to ensure proper connection to the network node. This approach may result in increased power consumption because the main radio component may be woken up frequently. In another configuration, the UE may evaluate the link quality of the WUR and may choose whether to switch to the main radio component for paging monitoring and / or RRM measurements based on the measurement results of the low power-synchronization signal (LP-SS) (LP-SS may be based on on-off keying). This approach can be used if the WUR is capable of performing RRM measurements. However, depending on the specific implementation of the WUR, the WUR may or may not be able to perform RRM measurements.

[0081] Figure 6 600 is a block diagram illustrating an example architecture of a WUR using a single-bit ADC converter or a comparator according to one or more aspects. As shown, the WUR may include a low-pass filter 602, an energy detector 604, a comparator 606, and a digital logic component 608. The input WUS 610 (e.g., LP-WUS 610) may be low-pass filtered at the low-pass filter 602. Then, the energy detector 604 may detect the energy of the WUS 610. The output from the energy detector 604 may be compared with a reference energy level at the comparator 606 (or a single-bit ADC). Based on the comparison, the result output by the comparator 606 may be 0 or 1. The digital logic component 608 may generate the output of the WUR based on the result output by the comparator 606. A WUR using a comparator or a single-bit ADC may consume less power than a WUR using a multi-bit ADC; however, a WUR using a comparator or a single-bit ADC may not be able to measure the signal power in the digital baseband.

[0082] In one configuration, a network node (e.g., a base station) may configure two power thresholds for a UE to determine whether the UE's WUR is to be activated and used to monitor the WUS for paging indications, and / or for performing RRM measurements. The UE may measure the received power of the network node (e.g., the received power of the serving cell), and may compare the measured received power with the power threshold. Based on the comparison, the UE may choose to turn on the WUR and use only the WUR or use the WUR in conjunction with the main radio component to perform signal monitoring, or not turn on the WUR and instead use only the main radio component to perform signal monitoring.

[0083] Figure 7 It is an example diagram 700 illustrating selecting a receiver for signal monitoring based on a received signal power / quality threshold according to one or more aspects. The signal monitoring may correspond to (including) paging monitoring and / or RRM measurement. As shown, the network node may configure a first threshold 702 and a second threshold 704, wherein the second threshold 704 may correspond to a signal power / quality stronger than the first threshold 702. The UE may measure the signal power / quality of the network node (serving cell) (e.g., reference signal received power (RSRP) measurement or reference signal received quality (RSRQ) measurement). If the measured signal power / quality is higher than the second threshold 704 (i.e., falls within the first range 712), the UE may activate the WUR and may only use the WUR to perform signal monitoring. If the measured signal power / quality is lower than the second threshold 704 but higher than the first threshold 702 (i.e., falls within the second range 714), the UE may activate the WUR and may jointly use both the main radio component and the WUR to perform signal monitoring (i.e., hybrid main radio component / WUR monitoring). Furthermore, if the measured signal power / quality is below the first threshold 702 (ie, falls within the third range 716), the UE may not activate the WUR and may only use the primary radio for signal monitoring.

[0084] In one or more configurations, the DL RS used for receiving signal power / quality measurement at the UE (e.g., for selecting a receiver for signal monitoring) may be at least one of SSB, CSI-RS, or LP-SS. Specifically, if the SSB or CSI-RS (e.g., using the same TX beam from the same TX node) is quasi co-located (QCL) with the WUS, the SSB or CSI-RS may be used. If no RS is available that is QCL with the WUS (e.g., the SSB and WUS may use different TX beams), the LP-SS may be used for receiving signal power / quality measurement at the UE.

[0085] In one configuration, the UE may report the selected receiver for paging monitoring and / or RRM measurements to the network node to assist the network node in configuring WUS transmissions. In addition, if hybrid primary radio / WUR signal monitoring is used, the UE may report signal power / quality measurements to the network node to assist the network node in configuring a periodic primary radio wake-up pattern at the UE. For example, the better the radio link quality (higher received signal power / quality), the less frequently the primary radio may be woken up.

[0086] In one configuration, for a UE in an RRC inactive state, the UE may provide signal power / quality measurements to a network node using a small data transmission (SDT) procedure without transitioning to an RRC connected state (mode).

[0087] In one or more configurations, a cell selection signal reception level (Srxlev) (as described in Technical Specification (TS) 38.304) threshold (e.g., in dB) for cell reselection (e.g., a threshold S for intra-frequency measurements) IntraSearchP and the thresholds S for inter-frequency measurements and inter-RAT measurements nonIntraSearchP ) can be reused as a signal power threshold for receiver selection for signal monitoring.

[0088] Figure 8 is an example diagram 800 illustrating selecting a receiver for signal monitoring based on a serving cell signal level threshold for cell reselection according to one or more aspects. As shown, the threshold S nonIntraSearchP 802 may correspond to Figure 7 The first threshold 702 in, and the threshold S IntraSearchP 804 may correspond to Figure 7 The second threshold 704 in .

[0089] If the measured signal power level is higher than the threshold S IntraSearchP 804 (ie, falls within the first range 812), the UE may activate the WUR and may only use the WUR to perform signal monitoring. Specifically, the UE may use the WUR to perform signal monitoring in the serving cell without performing signal monitoring for other cells.

[0090] If the measured signal power level is lower than the threshold S IntraSearchP 804 but above the threshold S nonIntraSearchP802 (i.e., falls within the second range 814), the UE may activate the WUR and may jointly use both the primary radio component and the WUR to perform signal monitoring (i.e., hybrid primary radio component / WUR monitoring). Specifically, the UE may use the WUR to perform signal monitoring in the serving cell, and may use the primary radio component to perform intra-frequency neighboring cell measurements (e.g., RRM measurements).

[0091] In addition, if the measured signal power level is lower than the threshold S nonIntraSearchP 802 (i.e., falls within the third range 816), the UE may not activate WUR and may only use the primary radio component for signal monitoring. Specifically, the UE may only use the primary radio component to perform signal monitoring in the serving cell, and perform intra-frequency, inter-frequency and / or inter-RAT neighbor cell measurements.

[0092] In a different configuration, since the WUR may be a low complexity receiver, the WUR may be used for serving cell measurements but not for neighbor cell RRM measurements (the UE may use the primary radio components to perform neighbor cell RRM measurements), and if there is more than one LP-SS sequence to detect, the WUR may have reduced (degraded) performance. For example, the WUR may detect whether its "own" signal is sent, but if it is not, it may not be able to detect exactly what sequence is sent.

[0093] In one or more configurations, if the UE reports its WUR capability for neighbor cell RRM measurements to a network node, the network node may select whether to use the same cell reselection signal power level threshold for receiver selection for signal monitoring (WUR activation determination).

[0094] Fig. 9 900 is a diagram illustrating an example multiplexing scheme in a scenario where both a primary radio and a WUR are used for signal monitoring in accordance with one or more aspects. For hybrid primary radio / WUR signal monitoring, the primary radio and the WUR may be time division multiplexed (by TDM), space division multiplexed (by SDM), or multiplexed using a combination 906 of time division multiplexing (TDM) and space division multiplexing (SDM).

[0095] For TDM 902, the network node may configure a time switching pattern to periodically switch between the WUR and the primary radio. For example, based on the time switching pattern, for every N paging cycles, the WUR may be active in the first N1 cycles, and the primary radio may be active in the remaining cycles for paging monitoring and RRM measurements. The value of N1 may be configured based on UE measurement reports.

[0096] In addition, for SDM 904, for a UE with multiple RX antennas (antenna ports), the WUR can utilize one RX antenna (port) while the other RX antennas (antenna ports) can be used by the main radio. In addition, antenna (port) switching between the WUR and the main radio can be performed based on the WUR detecting the WUS.

[0097] In one configuration, the network node may provide a set of criteria to the UE that are associated with a fallback that the UE triggers to the primary radio component when the WUR is activated. This configuration may be used when the UE is at the edge of a cell. These criteria associated with the fallback may be based on UE capabilities (e.g., whether the WUR includes a single-bit ADC or a multi-bit ADC). In addition, these criteria may be based on one or more of the following: a timer that is started or restarted after the UE receives a valid LP-SS or WUS via the WUR (e.g., a fallback may be performed when the timer expires), the number of LP-SSs that missed detection by the WUR within a time interval (e.g., a fallback may be performed when a threshold number of LP-SSs have missed detection), or the RSRP of the LP-SS is lower than a threshold (e.g., a fallback may be performed when the RSRP of the LP-SS is lower than a threshold). Therefore, based on the criteria associated with the fallback, the UE may wake up the primary radio component when the signal / channel quality is poor, and may not wake up the primary radio component when the signal / channel quality is satisfactory. Compared with periodically waking up the primary radio component, the criterion-based fallback approach may be associated with less power consumption.

[0098] If the WUR has a multi-bit ADC, the RSRP measurement criterion described above may be supported, since in order to evaluate whether the criterion is met, the WUR may need to be able to measure the LP-SS signal power in the baseband.

[0099] In some other configurations, fallback to the primary radio may be triggered for any of a number of possible reasons. These reasons may include, for example, the signal power of the LP-SS / WUS is too weak to detect, the WUR loses synchronization, or the LP-SS transmission is dropped due to a collision, etc.

[0100] In one or more configurations, when fallback to the primary radio component occurs, the UE may report the failure of the WUR to the network node. The reporting may be based on a random access channel (RACH) procedure or an SDT procedure using (pre-)configured dedicated resources.

[0101] In one or more configurations, if the UE is in RRC idle / inactive state (mode), the failure of the WUR may not trigger any cell reselection, and if the UE is in RRC connected state (mode), the failure of the WUR may not trigger a radio link failure. This may depend on the specific implementation of the network node to ensure that the failure of the WUR occurs before the failure of the main radio component via appropriate and proper parameter configuration, so that the UE may not frequently wake up the main radio component to detect whether there are any radio link quality issues with the main radio component when the WUR is active.

[0102] Fig.10 1000 is a diagram of a communication flow 1000 of a method of wireless communication according to one or more aspects. UE 1002 may implement Figure 4 At 1006, UE 1002 may measure the signal strength or signal quality of a serving cell.

[0103] In one configuration, the signal strength or the signal quality of the serving cell may be measured using the primary radio component.

[0104] In one configuration, the signal strength or the signal quality of the serving cell may be measured based on at least one of SSB, CSI-RS, or LP-SS. The LP-SS may be based on on-off keying.

[0105] In one configuration, the signal strength or the signal quality of the serving cell may be measured based on the SSB or the CSI-RS. The SSB or the CSI-RS may be in QCL with the LP-WUS associated with WUS monitoring.

[0106] At 1008 , UE 1002 may receive an indication of at least one threshold from network node 1004 .

[0107] At 1010, the UE 1002 may select whether to use the LP-WUR, the primary radio, or both the LP-WUR and the primary radio for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurement.

[0108] In one configuration, whether to use the LP-WUR, the primary radio, or both the LP-WUR and the primary radio for the signal monitoring may be further selected based on the at least one threshold as indicated at 1008 .

[0109] In one configuration, the at least one threshold may include a first threshold and a second threshold. In the event that the measured signal strength or signal quality of the serving cell is above the first threshold, only the LP-WUR may be selected for the signal monitoring. In the event that the measured signal strength or signal quality of the serving cell is below the first threshold but above the second threshold, both the LP-WUR and the primary radio component may be selected for the signal monitoring. In the event that the measured signal strength or signal quality of the serving cell is below the second threshold, only the primary radio component may be selected for the signal monitoring.

[0110] In one configuration, the first threshold may be associated with intra-frequency measurements for cell reselection.The second threshold may be associated with inter-frequency or inter-RAT measurements for cell reselection.

[0111] In one configuration, the measured signal strength or signal quality of the serving cell may be above the first threshold. Only the LP-WUR may be selected for the signal monitoring. The signal monitoring may correspond to the WUS monitoring or the RRM measurement. The RRM measurement may be associated with the serving cell.

[0112] In one configuration, the measured signal strength or signal quality of the serving cell may be below the first threshold but above the second threshold. Both the LP-WUR and the master radio may be selected for performing the signal monitoring. The signal monitoring may correspond to at least one of the WUS monitoring performed using the LP-WUR, the RRM measurements associated with the serving cell performed using the LP-WUR, or the RRM measurements associated with a non-serving (e.g., neighboring) cell performed using the master radio.

[0113] In one configuration, the measured signal strength or signal quality of the serving cell may be below the second threshold. Only the primary radio component may be selected for performing the signal monitoring. The signal monitoring may correspond to the SSB monitoring or the RRM measurements associated with the serving cell or a non-serving (e.g., neighboring) cell.

[0114] At 1012, the UE 1002 may send an indication of at least one receiver selected for the signal monitoring to the network node 1004. The at least one receiver may correspond to only the LP-WUR, only the primary radio, or both the LP-WUR and the primary radio.

[0115] At 1014, UE 1002 may send an indication of the measured signal strength or signal quality of the serving cell to network node 1004. The primary radio wake-up pattern may be based on the measured signal strength or signal quality of the serving cell.

[0116] In one configuration, the UE 1002 may be in an RRC inactive state.The indication of the measured signal strength or signal quality of the serving cell may be sent to the network node 1004 via SDT.

[0117] In one configuration, both the LP-WUR and the main radio may be selected for performing the signal monitoring. The signal monitoring may correspond to at least the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio. The WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio may be TDM and / or SDM.

[0118] In one configuration, the WUS monitoring using the LP-WUR and the SSB monitoring using the primary radio may be TDM based on a time-switched pattern. At 1016, the UE 1002 may receive an indication of the time-switched pattern from the network node 1004.

[0119] In one configuration, the time switching pattern may include a ratio (or a first number) of paging cycles (e.g., N1 paging cycles as described above) associated with the WUS monitoring using the LP-WUR in a predefined number of paging cycles (e.g., N paging cycles as described above). The ratio (first number) of paging cycles may be based on the measured signal strength or signal quality of the serving cell.

[0120] At 1018, the UE 1002 may activate one of the LP-WUR or the primary radio for the signal monitoring based on the time switching pattern.

[0121] In one configuration, the WUS monitoring using the LP-WUR and the SSB monitoring using the primary radio may be SDM. The LP-WUR and the primary radio may be associated with different receive antenna ports. At 1020, the UE 1002 may activate one or more receive antenna ports at the primary radio based on detecting one or more WUS by the LP-WUR.

[0122] At 1022, the UE 1002 may receive an indication of one or more criteria associated with fallback from the LP-WUR to the primary radio component from the network node 1004. The one or more criteria may be associated with at least one of: a timer started or restarted after receiving an LP-SS or LP-WUS, a predefined number of missed LP-SSs within a time interval, or a signal strength threshold associated with the LP-SS.

[0123] At 1024, the UE 1002 performs the fallback from the LP-WUR to the primary radio based on satisfying at least one of the one or more criteria.

[0124] At 1026, the UE 1002 may send an indication of the LP-WUR failure to the network node 1004 based on the fallback from the LP-WUR to the primary radio.

[0125] Fig.11 1100 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104 / 350 / 1002; device 1304). At 1102, the UE may measure the signal strength or signal quality of a serving cell. For example, 1102 may be performed by Fig.13 Component 198 in the implementation. Fig.10 At 1006, UE 1002 may measure the signal strength or signal quality of the serving cell.

[0126] At 1104, the UE may select whether to use the LP-WUR, the primary radio, or both the LP-WUR and the primary radio for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurement. For example, 1104 may be performed by Fig.13 Component 198 in the implementation. Fig.10 At 1010, the UE 1002 may select whether to use the LP-WUR, the primary radio, or both the LP-WUR and the primary radio for signal monitoring based on the measured signal strength or signal quality of the serving cell.

[0127] Fig.12 1200 is a flow chart of a method of wireless communication. The method may be performed by a UE (e.g., UE 104 / 350 / 1002; device 1304). At 1202, the UE may measure the signal strength or signal quality of a serving cell. For example, 1202 may be performed by Fig.13 Component 198 in the implementation. Fig.10 At 1006, UE 1002 may measure the signal strength or signal quality of the serving cell.

[0128] At 1206, the UE may select whether to use the LP-WUR, the primary radio, or both the LP-WUR and the primary radio for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurement. For example, 1206 may be performed by Fig.13 Component 198 in the implementation. Fig.10 At 1010, the UE 1002 may select whether to use the LP-WUR, the primary radio, or both the LP-WUR and the primary radio for signal monitoring based on the measured signal strength or signal quality of the serving cell.

[0129] In one configuration, reference Fig.10 The signal strength or the signal quality of the serving cell may be measured at 1006 using the primary radio component.

[0130] In one configuration, at 1204, the UE may receive an indication of at least one threshold from a network node. Whether to use the LP-WUR, the primary radio, or both the LP-WUR and the primary radio for the signal monitoring may be further selected based on the at least one threshold. For example, 1204 may be performed by Fig.13 Component 198 in the implementation. Fig.10 At 1008 , UE 1002 may receive an indication of at least one threshold from network node 1004 .

[0131] In one configuration, the at least one threshold may include a first threshold and a second threshold. Fig.10 , in the event that the measured signal strength or signal quality of the serving cell is above the first threshold, only the LP-WUR may be selected for the signal monitoring at 1010. In the event that the measured signal strength or signal quality of the serving cell is below the first threshold but above the second threshold, both the LP-WUR and the primary radio may be selected for the signal monitoring at 1010. In the event that the measured signal strength or signal quality of the serving cell is below the second threshold, only the primary radio may be selected for the signal monitoring at 1010.

[0132] In one configuration, the first threshold may be associated with intra-frequency measurements for cell reselection.The second threshold may be associated with inter-frequency or inter-RAT measurements for cell reselection.

[0133] In one configuration, the measured signal strength or signal quality of the serving cell may be above the first threshold. Fig.10 , only the LP-WUR may be selected for the signal monitoring at 1010. The signal monitoring may correspond to the WUS monitoring or the RRM measurement. The RRM measurement may be associated with the serving cell.

[0134] In one configuration, the measured signal strength or signal quality of the serving cell may be below the first threshold but above the second threshold. Fig.10, both the LP-WUR and the master radio may be selected for performing the signal monitoring at 1010. The signal monitoring may correspond to at least one of the WUS monitoring performed using the LP-WUR, the RRM measurements associated with the serving cell performed using the LP-WUR, or the RRM measurements associated with a non-serving cell performed using the master radio.

[0135] In one configuration, the measured signal strength or signal quality of the serving cell may be below the second threshold. Fig.10 , only the primary radio component may be selected for performing the signal monitoring at 1010. The signal monitoring may correspond to the SSB monitoring or the RRM measurements associated with the serving cell or non-serving cell.

[0136] In one configuration, reference Fig.10 The signal strength or the signal quality of the serving cell may be measured based on at least one of SSB, CSI-RS, or LP-SS at 1006. The LP-SS may be based on on-off keying.

[0137] In one configuration, reference Fig.10 The signal strength or the signal quality of the serving cell may be measured based on the SSB or the CSI-RS at 1006. The SSB or the CSI-RS may be in QCL with the LP-WUS associated with WUS monitoring.

[0138] In one configuration, at 1208, the UE may send an indication of at least one receiver selected for the signal monitoring to the network node. The at least one receiver may correspond to only the LP-WUR, only the primary radio component, or both the LP-WUR and the primary radio component. For example, 1208 may be performed by Fig.13 Component 198 in the implementation. Fig.10 At 1012, UE 1002 may send an indication to network node 1004 of at least one receiver selected for the signal monitoring.

[0139] In one configuration, reference Fig.10 , both the LP-WUR and the master radio may be selected at 1010 for the signal monitoring. At 1210, the UE may send an indication of the measured signal strength or signal quality of the serving cell to a network node. The master radio wake-up pattern may be based on the measured signal strength or signal quality of the serving cell. For example, 1210 may be determined by Fig.13 Component 198 in the implementation. Fig.10At 1014, UE 1002 may send an indication of the measured signal strength or signal quality of the serving cell to network node 1004.

[0140] In one configuration, reference Fig.10 , UE 1002 may be in an RRC inactive state. The indication of the measured signal strength or signal quality of the serving cell may be sent to the network node 1004 via SDT at 1014 .

[0141] In one configuration, reference Fig.10 , both the LP-WUR and the master radio may be selected for performing the signal monitoring at 1010. The signal monitoring may correspond to at least the WUS monitoring using the LP-WUR and the SSB monitoring using the master radio. The WUS monitoring using the LP-WUR and the SSB monitoring using the master radio may be TDM and / or SDM.

[0142] In one configuration, the WUS monitoring using the LP-WUR and the SSB monitoring using the primary radio component may be TDM based on a time switching pattern. At 1212, the UE may receive an indication of the time switching pattern from a network node. For example, 1212 may be Fig.13 Component 198 in the implementation. Fig.10 At 1016, UE 1002 may receive an indication of the time switching mode from network node 1004.

[0143] At 1214, the UE may activate one of the LP-WUR or the primary radio component to perform the signal monitoring based on the time switching pattern. For example, 1214 may be performed by Fig.13 Component 198 in the implementation. Fig.10 At 1018, the UE 1002 may activate one of the LP-WUR or the main radio component to perform the signal monitoring based on the time switching pattern.

[0144] In one configuration, the time switching pattern may include a proportion of paging cycles associated with the WUS monitoring using the LP-WUR in a predefined number of paging cycles. The proportion of paging cycles may be based on a measured signal strength or signal quality of the serving cell.

[0145] In one configuration, the WUS monitoring using the LP-WUR and the SSB monitoring using the primary radio may be SDM. The LP-WUR and the primary radio may be associated with different receive antenna ports. At 1216, the UE may activate one or more receive antenna ports at the primary radio based on the LP-WUR detecting one or more WUS. The one or more receive antenna ports may be associated with the LP-WUR before the LP-WUR detects the one or more WUS. For example, 1216 may be Fig.13 Component 198 in the implementation. Fig.10 At 1020, the UE 1002 may activate one or more receive antenna ports at the primary radio component based on detecting one or more WUSs by the LP-WUR.

[0146] In one configuration, at 1218, the UE may receive from the network node an indication of one or more criteria associated with fallback from the LP-WUR to the primary radio component. The one or more criteria may be associated with at least one of: a timer started or restarted after receiving an LP-SS or LP-WUS, a predefined number of missed LP-SSs within a time interval, or a signal strength threshold associated with the LP-SS. For example, 1216 may be Fig.13 Component 198 in the implementation. Fig.10 At 1022, the UE 1002 may receive, from the network node 1004, an indication of one or more criteria associated with fallback from the LP-WUR to the primary radio component.

[0147] In one configuration, at 1220, the UE may perform the fallback from the LP-WUR to the primary radio component based on satisfying at least one of the one or more criteria. For example, 1220 may be performed by Fig.13 Component 198 in the implementation. Fig.10 At 1024, the UE 1002 performs the fallback from the LP-WUR to the primary radio component based on satisfying at least one of the one or more criteria.

[0148] At 1222, the UE may send an indication of a LP-WUR failure to the network node based on the fallback from the LP-WUR to the primary radio component. For example, 1222 may be Fig.13 Component 198 in the implementation. Fig.10 At 1026, the UE 1002 may send an indication of a LP-WUR failure to the network node 1004 based on the fallback from the LP-WUR to the primary radio component.

[0149] Fig.131300 is a diagram illustrating an example of a hardware implementation for an apparatus 1304. The apparatus 1304 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus 1304 may include a cellular baseband processor 1324 (also referred to as a modem) coupled to one or more transceivers 1322 (e.g., a cellular RF transceiver). The cellular baseband processor 1324 may include on-chip memory 1324'. In some aspects, the apparatus 1304 may also include one or more subscriber identity module (SIM) cards 1320 and an application processor 1306 coupled to a secure digital (SD) card 1308 and a screen 1310. The application processor 1306 may include on-chip memory 1306'. In some aspects, the device 1304 may also include a Bluetooth module 1312, a WLAN module 1314, an SPS module 1316 (e.g., a GNSS module), one or more sensor modules 1318 (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 1326, a power source 1330, and / or a camera 1332. The Bluetooth module 1312, the WLAN module 1314, and the SPS module 1316 may include an on-chip transceiver (TRX) (or in some cases, only a receiver (RX)). The Bluetooth module 1312, the WLAN module 1314, and the SPS module 1316 may include their own dedicated antennas and / or communicate using an antenna 1380. The cellular baseband processor 1324 communicates with the UE 104 and / or the RU associated with the network entity 1302 through the transceiver 1322 via one or more antennas 1380. The cellular baseband processor 1324 and the application processor 1306 may each include a computer-readable medium / memory 1324', 1306', respectively. The additional memory module 1326 may also be considered as a computer-readable medium / memory. Each computer-readable medium / memory 1324', 1306', 1326 may be non-transitory. The cellular baseband processor 1324 and the application processor 1306 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 1324 / application processor 1306, enables the cellular baseband processor 1324 / application processor 1306 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 1324 / application processor 1306 when executing the software.The cellular baseband processor 1324 / application processor 1306 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 1304 may be a processor chip (modem and / or application) and include only the cellular baseband processor 1324 and / or the application processor 1306, and in another configuration, the device 1304 may be the entire UE (e.g., see. Figure 3 350) and includes additional modules of device 1304.

[0150] As discussed above, component 198 is configured to measure the signal strength or signal quality of the serving cell. Component 198 is configured to select whether to use LP-WUR, the main radio component, or both the LP-WUR and the main radio component for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurement. Component 198 may be within the cellular baseband processor 1324, the application processor 1306, or both the cellular baseband processor 1324 and the application processor 1306. Component 198 may be one or more hardware components that are specifically configured to perform the stated process / algorithm, implemented by one or more processors configured to perform the stated process / algorithm, stored in a computer-readable medium for implementation by one or more processors, or some combination of the foregoing. As shown, device 1304 may include a variety of components configured for various functions. In one configuration, the device 1304 (and specifically, the cellular baseband processor 1324 and / or the application processor 1306) includes means for measuring a signal strength or signal quality of a serving cell. The device 1304 (and specifically, the cellular baseband processor 1324 and / or the application processor 1306) includes means for selecting whether to use the LP-WUR, the primary radio, or both the LP-WUR and the primary radio for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring may be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurements.

[0151] In one configuration, the signal strength or the signal quality of the serving cell may be measured using the primary radio component. In one configuration, the device 1304 (and specifically, the cellular baseband processor 1324 and / or the application processor 1306) includes a component for receiving an indication of at least one threshold from a network node, wherein whether to use the LP-WUR, the primary radio component, or both the LP-WUR and the primary radio component for the signal monitoring is further selected based on the at least one threshold. In one configuration, the at least one threshold may include a first threshold and a second threshold. In the case where the measured signal strength or signal quality of the serving cell is above the first threshold, only the LP-WUR may be selected for the signal monitoring. In the case where the measured signal strength or signal quality of the serving cell is below the first threshold but above the second threshold, both the LP-WUR and the primary radio component may be selected for the signal monitoring. In the case where the measured signal strength or signal quality of the serving cell is below the second threshold, only the primary radio component may be selected for the signal monitoring. In one configuration, the first threshold may be associated with intra-frequency measurements for cell reselection. The second threshold may be associated with an inter-frequency or inter-RAT measurement for cell reselection. In one configuration, the measured signal strength or signal quality of the serving cell may be higher than the first threshold. Only the LP-WUR may be selected for the signal monitoring. The signal monitoring may correspond to the WUS monitoring or the RRM measurement. The RRM measurement may be associated with the serving cell. In one configuration, the measured signal strength or signal quality of the serving cell may be lower than the first threshold but higher than the second threshold. Both the LP-WUR and the main radio component may be selected for the signal monitoring. The signal monitoring may correspond to at least one of the WUS monitoring performed using the LP-WUR, the RRM measurement associated with the serving cell performed using the LP-WUR, or the RRM measurement associated with the non-serving cell performed using the main radio component. In one configuration, the measured signal strength or signal quality of the serving cell may be lower than the second threshold. Only the main radio component may be selected for the signal monitoring. The signal monitoring may correspond to the SSB monitoring or the RRM measurement associated with the serving cell or the non-serving cell. In one configuration, the signal strength or the signal quality of the serving cell may be measured based on at least one of SSB, CSI-RS, or LP-SS. The LP-SS may be based on on-off keying. In one configuration, the signal strength or the signal quality of the serving cell may be measured based on the SSB or the CSI-RS. The SSB or the CSI-RS may be in QCL with the LP-WUS associated with WUS monitoring.In one configuration, the device 1304 (and specifically, the cellular baseband processor 1324 and / or the application processor 1306) includes a component for sending an indication of at least one receiver selected for the signal monitoring to a network node. The at least one receiver may correspond only to the LP-WUR, only to the main radio component, or to both the LP-WUR and the main radio component. In one configuration, both the LP-WUR and the main radio component may be selected for performing the signal monitoring. The device 1304 (and specifically, the cellular baseband processor 1324 and / or the application processor 1306) includes a component for sending an indication of the measured signal strength or signal quality of the serving cell to the network node. The main radio component wake-up mode may be based on the measured signal strength or signal quality of the serving cell. In one configuration, the UE may be in an RRC inactive state. The indication of the measured signal strength or signal quality of the serving cell may be sent to the network node via SDT. In one configuration, both the LP-WUR and the main radio component may be selected for performing the signal monitoring. The signal monitoring may correspond to at least the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component. The WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component may be TDM and / or SDM. In one configuration, the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component may be TDM based on a time switching pattern. The device 1304 (and specifically, the cellular baseband processor 1324 and / or the application processor 1306) includes a component for receiving an indication of the time switching pattern from a network node. The device 1304 (and specifically, the cellular baseband processor 1324 and / or the application processor 1306) includes a component for activating one of the LP-WUR or the main radio component to perform the signal monitoring based on the time switching pattern. In one configuration, the time switching pattern may include a proportion of paging cycles associated with the WUS monitoring performed using the LP-WUR in a predefined number of paging cycles. The ratio of the paging cycle may be based on the measured signal strength or signal quality of the serving cell. In one configuration, the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component may be SDM. The LP-WUR and the main radio component may be associated with different receive antenna ports. The device 1304 (and specifically, the cellular baseband processor 1324 and / or the application processor 1306) includes a component for activating one or more receive antenna ports at the main radio component based on the LP-WUR detecting one or more WUS. The one or more receive antenna ports may be associated with the LP-WUR before the LP-WUR detects the one or more WUS.In one configuration, the device 1304 (and in particular, the cellular baseband processor 1324 and / or the application processor 1306) includes a component for receiving an indication of one or more criteria associated with a fallback from the LP-WUR to the primary radio component from a network node. The one or more criteria may be associated with at least one of: a timer started or restarted after receiving an LP-SS or LP-WUS, a predefined number of missed LP-SSs within a time interval, or a signal strength threshold associated with the LP-SS. In one configuration, the device 1304 (and in particular, the cellular baseband processor 1324 and / or the application processor 1306) includes a component for performing the fallback from the LP-WUR to the primary radio component based on satisfying at least one of the one or more criteria. The device 1304 (and in particular, the cellular baseband processor 1324 and / or the application processor 1306) includes a component for sending an indication of a LP-WUR failure to the network node based on the fallback from the LP-WUR to the primary radio component.

[0152] This means may be a component 198 of the apparatus 1304 configured to perform the functions recited by the means. As described above, the apparatus 1304 may include the TX processor 368, the RX processor 356, and the controller / processor 359. Thus, in one configuration, this means may be the TX processor 368, the RX processor 356, and / or the controller / processor 359 configured to perform the functions recited by the means.

[0153] Return to reference Figures 4 to 13 , the UE can measure the signal strength or signal quality of the serving cell. The UE can choose whether to use the LP-WUR, the main radio component, or both the LP-WUR and the main radio component for signal monitoring based on the measured signal strength or signal quality of the serving cell. The signal monitoring can be associated with at least one of WUS monitoring, SSB monitoring, or RRM measurement. Therefore, by using an appropriate receiver for signal monitoring, when the UE is at the edge of the cell, the UE will not miss any WUS and will not be unable to wake up the main radio component. In addition, by avoiding unnecessarily frequent waking up of the main radio component, power savings associated with the use of the WUR can be maintained. These aspects can also be used even if the WUR uses a single-bit ADC or comparator.

[0154] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is merely an illustration of an exemplary approach. It should be understood that the specific order or hierarchy of the blocks in the process / flowchart may be rearranged based on design preferences. In addition, some blocks may be combined or omitted. The attached method claims provide the elements of the various blocks in a sample order, but are not limited to the specific order or hierarchy provided.

[0155] 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 may 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 "while" do not mean a direct temporal relationship or reaction. That is, these phrases (such as "when ...") do not mean an immediate action in response to the occurrence of an action or during the occurrence of an action, but simply imply that if the conditions are met, the action will occur, but no specific or immediate time limit is required for the occurrence of the action. 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 advantages 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, data can be directly received / sent between the first device and the second device, or data can be indirectly received / sent 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 be known later to those 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 recorded in the claims. The words "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 recorded using the phrase "component for..."

[0156] 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, conditions, factors, etc.) should be interpreted as "based at least on A" unless specifically stated differently.

[0157] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0158] Aspect 1 is a method for performing wireless communication at a UE, the method comprising: measuring the signal strength or signal quality of a serving cell; and selecting whether to use an LP-WUR, a main radio component, or both the LP-WUR and the main radio component for signal monitoring based on the measured signal strength or signal quality of the serving cell, the signal monitoring being associated with at least one of WUS monitoring, SSB monitoring, or RRM measurement.

[0159] Aspect 2 is the method according to aspect 1, wherein the signal strength or the signal quality of the serving cell is measured using the primary radio component.

[0160] Aspect 3 is a method according to any one of Aspects 1 and 2, the method further comprising: receiving an indication of at least one threshold from a network node, wherein whether to use the LP-WUR, the main radio component, or both the LP-WUR and the main radio component to perform the signal monitoring is further selected based on the at least one threshold.

[0161] Aspect 4 is a method according to Aspect 3, wherein the at least one threshold includes a first threshold and a second threshold, and when the measured signal strength or signal quality of the serving cell is higher than the first threshold, only the LP-WUR is selected for the signal monitoring, and when the measured signal strength or signal quality of the serving cell is lower than the first threshold but higher than the second threshold, both the LP-WUR and the main radio component are selected for the signal monitoring, and when the measured signal strength or signal quality of the serving cell is lower than the second threshold, only the main radio component is selected for the signal monitoring.

[0162] Aspect 5 is a method according to aspect 4, wherein the first threshold is associated with intra-frequency measurement for cell reselection, and the second threshold is associated with inter-frequency or inter-RAT measurement for cell reselection.

[0163] Aspect 6 is a method according to Aspect 5, wherein the measured signal strength or signal quality of the serving cell is higher than the first threshold, only the LP-WUR is selected for the signal monitoring, the signal monitoring corresponds to the WUS monitoring or the RRM measurement, and the RRM measurement is associated with the serving cell.

[0164] Aspect 7 is a method according to Aspect 5, wherein the measured signal strength or signal quality of the service cell is lower than the first threshold but higher than the second threshold, both the LP-WUR and the main radio component are selected for performing the signal monitoring, and the signal monitoring corresponds to at least one of the WUS monitoring performed using the LP-WUR, the RRM measurement associated with the service cell performed using the LP-WUR, or the RRM measurement associated with the non-service cell performed using the main radio component.

[0165] Aspect 8 is a method according to Aspect 5, wherein the measured signal strength or signal quality of the serving cell is lower than the second threshold, only the primary radio component is selected for performing the signal monitoring, and the signal monitoring corresponds to the SSB monitoring or the RRM measurement associated with the serving cell or the non-serving cell.

[0166] Aspect 9 is a method according to any one of aspects 1 to 8, wherein the signal strength or the signal quality of the serving cell is measured based on at least one of SSB, CSI-RS or LP-SS, and the LP-SS is based on on-off keying.

[0167] Aspect 10 is a method according to aspect 9, wherein the signal strength or the signal quality of the serving cell is measured based on the SSB or the CSI-RS, and the SSB or the CSI-RS is in QCL with the LP-WUS associated with the WUS monitoring.

[0168] Aspect 11 is a method according to any one of Aspects 1 to 10, the method further comprising: sending an indication of at least one receiver selected for the signal monitoring to a network node, wherein the at least one receiver corresponds only to the LP-WUR, only to the main radio component, or to both the LP-WUR and the main radio component.

[0169] Aspect 12 is a method according to any one of Aspects 1, 2 and 9 to 11, wherein both the LP-WUR and the main radio component are selected for performing the signal monitoring, and the method also includes: sending an indication of the measured signal strength or signal quality of the serving cell to a network node, and wherein the main radio component wake-up mode is based on the measured signal strength or signal quality of the serving cell.

[0170] Aspect 13 is the method according to aspect 12, wherein the UE is in an RRC inactive state, and the indication of the measured signal strength or signal quality of the serving cell is sent to the network node via SDT.

[0171] Aspect 14 is a method according to any one of Aspects 1, 2 and 9 to 11, wherein both the LP-WUR and the main radio component are selected for performing the signal monitoring, the signal monitoring corresponds at least to the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component, and the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component are TDM and / or SDM.

[0172] Aspect 15 is a method according to Aspect 14, wherein the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component are TDM based on a time switching mode, and the method further includes: receiving an indication of the time switching mode from a network node; and activating one of the LP-WUR or the main radio component to perform the signal monitoring based on the time switching mode.

[0173] Aspect 16 is a method according to Aspect 15, wherein the time switching pattern includes a proportion of paging cycles associated with the WUS monitoring performed using the LP-WUR in a predefined number of paging cycles, and the proportion of paging cycles is based on the measured signal strength or signal quality of the serving cell.

[0174] Aspect 17 is a method according to Aspect 14, wherein the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component are SDM, the LP-WUR and the main radio component are associated with different receiving antenna ports, and the method further includes: activating one or more receiving antenna ports at the main radio component based on the LP-WUR detecting one or more WUS, and the one or more receiving antenna ports are associated with the LP-WUR before the LP-WUR detects the one or more WUS.

[0175] Aspect 18 is a method according to any one of aspects 1 to 6 and 9 to 11, the method further comprising: receiving, from a network node, an indication of one or more criteria associated with a fallback from the LP-WUR to the primary radio component, wherein the one or more criteria are associated with at least one of: a timer started or restarted after receiving an LP-SS or LP-WUS, a predefined number of missed LP-SSs within a time interval, or a signal strength threshold associated with the LP-SS.

[0176] Aspect 19 is a method according to Aspect 18, and the method also includes: performing the fallback from the LP-WUR to the main radio component based on satisfying at least one of the one or more criteria; and sending an indication of the LP-WUR failure to the network node based on the fallback from the LP-WUR to the main radio component.

[0177] Aspect 20 is an apparatus for wireless communication, the apparatus comprising: at least one processor, the at least one processor being coupled to a memory, and the at least one processor being configured to implement a method as described in any one of Aspects 1 to 19 based at least in part on information stored in the memory.

[0178] Aspect 21 may be combined with Aspect 20, and further comprises: a transceiver coupled to the at least one processor.

[0179] Aspect 22 is an apparatus for wireless communication, the apparatus comprising means for implementing any one of aspects 1 to 19.

[0180] Aspect 23 is a non-transitory computer-readable storage medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 1 to 19.

[0181] Various aspects have been described herein. These and other aspects are within the scope of the following claims.

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: Measuring the signal strength or signal quality of a serving cell; and Based on the measured signal strength or signal quality of the serving cell, a selection is made as to whether to use a low power-wake-up receiver (LP-WUR), a main radio component, or both the LP-WUR and the main radio component for signal monitoring, the signal monitoring being associated with at least one of wake-up signal (WUS) monitoring, synchronization signal block (SSB) monitoring, or radio resource management (RRM) measurement. 2 . The apparatus of claim 1 , wherein the signal strength or the signal quality of the serving cell is measured using the primary radio component.

3. The apparatus of claim 1 , wherein the at least one processor is further configured to: An indication of at least one threshold is received from a network node, wherein whether to perform the signal monitoring using the LP-WUR, the primary radio, or both the LP-WUR and the primary radio is selected further based on the at least one threshold.

4. The apparatus of claim 3, wherein the at least one threshold comprises a first threshold and a second threshold, and when the measured signal strength or signal quality of the serving cell is higher than the first threshold, only the LP-WUR is selected for the signal monitoring, when the measured signal strength or signal quality of the serving cell is lower than the first threshold but higher than the second threshold, both the LP-WUR and the main radio component are selected for the signal monitoring, and when the measured signal strength or signal quality of the serving cell is lower than the second threshold, only the main radio component is selected for the signal monitoring.

5. The apparatus of claim 4, wherein the first threshold is associated with intra-frequency measurements for cell reselection, and the second threshold is associated with inter-frequency or inter-radio access technology (RAT) measurements for cell reselection.

6. The apparatus of claim 5, wherein the measured signal strength or signal quality of the serving cell is higher than the first threshold, only the LP-WUR is selected for the signal monitoring, the signal monitoring corresponds to the WUS monitoring or the RRM measurement, and the RRM measurement is associated with the serving cell.

7. An apparatus according to claim 5, wherein the measured signal strength or signal quality of the serving cell is lower than the first threshold but higher than the second threshold, both the LP-WUR and the main radio component are selected for performing the signal monitoring, and the signal monitoring corresponds to at least one of the WUS monitoring performed using the LP-WUR, the RRM measurement associated with the serving cell performed using the LP-WUR, or the RRM measurement associated with a non-serving cell performed using the main radio component.

8. The apparatus of claim 5, wherein the measured signal strength or signal quality of the serving cell is below the second threshold, only the primary radio component is selected for the signal monitoring, and the signal monitoring corresponds to the SSB monitoring or the RRM measurement associated with the serving cell or the non-serving cell.

9. The apparatus of claim 1 , wherein the signal strength or the signal quality of the serving cell is measured based on at least one of an SSB, a channel state information-reference signal (CSI-RS), or a low power-synchronization signal (LP-SS), and the LP-SS is based on on-off keying.

10. The apparatus of claim 9, wherein the signal strength or the signal quality of the serving cell is measured based on the SSB or the CSI-RS, and the SSB or the CSI-RS is quasi co-located (QCL) with a low power-WUS (LP-WUS) associated with the WUS monitoring.

11. The apparatus of claim 1 , wherein the at least one processor is further configured to: An indication of at least one receiver selected for the signal monitoring is sent to a network node, wherein the at least one receiver corresponds to only the LP-WUR, only the primary radio, or both the LP-WUR and the primary radio.

12. The apparatus of claim 1 , wherein both the LP-WUR and the primary radio are selected for performing the signal monitoring, and the at least one processor is further configured to: An indication of a measured signal strength or signal quality of the serving cell is sent to a network node, and wherein a primary radio component wake-up pattern is based on the measured signal strength or signal quality of the serving cell.

13. The apparatus of claim 12, wherein the UE is in a radio resource control (RRC) inactive state, and the indication of the measured signal strength or signal quality of the serving cell is sent to the network node via a small data transmission (SDT).

14. The apparatus of claim 1 , wherein both the LP-WUR and the main radio component are selected for performing the signal monitoring, the signal monitoring corresponding at least to the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component, and the WUS monitoring performed using the LP-WUR and the SSB monitoring performed using the main radio component are time division multiplexed (by TDM) and / or space division multiplexed (by SDM).

15. The apparatus of claim 14, wherein the WUS monitoring using the LP-WUR and the SSB monitoring using the primary radio are TDM based on a time switching pattern, and the at least one processor is further configured to: receiving an indication of the time switching pattern from a network node; and One of the LP-WUR or the main radio is activated based on the time switching pattern to perform the signal monitoring.

16. An apparatus according to claim 15, wherein the time switching pattern includes a proportion of paging cycles associated with the WUS monitoring performed using the LP-WUR in a predefined number of paging cycles, and the proportion of paging cycles is based on the measured signal strength or signal quality of the serving cell.

17. The apparatus of claim 14, wherein the WUS monitoring using the LP-WUR and the SSB monitoring using the primary radio are SDM, the LP-WUR and the primary radio are associated with different receive antenna ports, and the at least one processor is further configured to: One or more receive antenna ports at the primary radio are activated based on the LP-WUR detecting one or more WUSs, the one or more receive antenna ports being associated with the LP-WUR prior to the LP-WUR detecting the one or more WUSs.

18. The apparatus of claim 1, wherein the at least one processor is further configured to: An indication of one or more criteria associated with a fallback from the LP-WUR to the primary radio component is received from a network node, wherein the one or more criteria are associated with at least one of: a timer started or restarted after receiving a low power-synchronization signal (LP-SS) or a low power-WUS (LP-WUS), a predefined number of missed LP-SSs within a time interval, or a signal strength threshold associated with the LP-SS.

19. The apparatus of claim 18, wherein the at least one processor is further configured to: performing the fallback from the LP-WUR to the primary radio based on satisfying at least one of the one or more criteria; and An indication of an LP-WUR failure is sent to the network node based on the fallback from the LP-WUR to the primary radio.

20. The apparatus according to claim 1, further comprising: A transceiver is coupled to the at least one processor.

21. A method of wireless communication at a user equipment (UE), the method comprising: Measuring the signal strength or signal quality of the serving cell; as well as Based on the measured signal strength or signal quality of the serving cell, a selection is made as to whether to use a low power-wake-up receiver (LP-WUR), a main radio component, or both the LP-WUR and the main radio component for signal monitoring, the signal monitoring being associated with at least one of wake-up signal (WUS) monitoring, synchronization signal block (SSB) monitoring, or radio resource management (RRM) measurement.

22. The method of claim 21, wherein the signal strength or the signal quality of the serving cell is measured using the primary radio component.

23. The method according to claim 21, further comprising: An indication of at least one threshold is received from a network node, wherein whether to perform the signal monitoring using the LP-WUR, the primary radio, or both the LP-WUR and the primary radio is selected further based on the at least one threshold.

24. The method of claim 23, wherein the at least one threshold comprises a first threshold and a second threshold, and when the measured signal strength or signal quality of the serving cell is higher than the first threshold, only the LP-WUR is selected for the signal monitoring, when the measured signal strength or signal quality of the serving cell is lower than the first threshold but higher than the second threshold, both the LP-WUR and the main radio component are selected for the signal monitoring, and when the measured signal strength or signal quality of the serving cell is lower than the second threshold, only the main radio component is selected for the signal monitoring.

25. The method of claim 24, wherein the first threshold is associated with intra-frequency measurements for cell reselection, and the second threshold is associated with inter-frequency or inter-radio access technology (RAT) measurements for cell reselection.

26. The method of claim 25, wherein the measured signal strength or signal quality of the serving cell is higher than the first threshold, only the LP-WUR is selected for the signal monitoring, the signal monitoring corresponds to the WUS monitoring or the RRM measurement, and the RRM measurement is associated with the serving cell.

27. A method according to claim 25, wherein the measured signal strength or signal quality of the serving cell is lower than the first threshold but higher than the second threshold, both the LP-WUR and the main radio component are selected for performing the signal monitoring, and the signal monitoring corresponds to at least one of the WUS monitoring performed using the LP-WUR, the RRM measurement associated with the serving cell performed using the LP-WUR, or the RRM measurement associated with a non-serving cell performed using the main radio component.

28. The method of claim 25, wherein the measured signal strength or signal quality of the serving cell is below the second threshold, only the primary radio component is selected for performing the signal monitoring, and the signal monitoring corresponds to the SSB monitoring or the RRM measurement associated with the serving cell or the non-serving cell.

29. An apparatus for wireless communication at a user equipment (UE), the apparatus comprising: Components for measuring the signal strength or signal quality of a serving cell; and A component for selecting whether to use a low power-wake-up receiver (LP-WUR), a main radio component, or both the LP-WUR and the main radio component for signal monitoring based on the measured signal strength or signal quality of the serving cell, the signal monitoring being associated with at least one of wake-up signal (WUS) monitoring, synchronization signal block (SSB) monitoring, or radio resource management (RRM) measurements.

30. A computer readable medium storing computer executable code at a user equipment (UE) which, when executed by a processor, causes the processor to: Measuring the signal strength or signal quality of a serving cell; and Based on the measured signal strength or signal quality of the serving cell, a selection is made as to whether to use a low power-wake-up receiver (LP-WUR), a main radio component, or both the LP-WUR and the main radio component for signal monitoring, the signal monitoring being associated with at least one of wake-up signal (WUS) monitoring, synchronization signal block (SSB) monitoring, or radio resource management (RRM) measurement.

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