Adaptive tracking loop update in user equipment

Abstract

When operating in a discontinuous reception (DRX) mode, a wireless communication device can adaptively perform tracking loop updates for a rude wake-up event. In one aspect, the wireless communication device can perform one or more tracking loop updates, such as a time tracking loop (TTL) update and a frequency tracking loop (FTL) update, based on a time difference between a last tracking loop update and a warm-up occasion associated with the rude wake-up event being greater than a threshold. Further, in response to the time difference being less than or equal to the threshold, the wireless communication device can perform the rude wake-up event without performing the one or more tracking loop updates.

Description

[0001] Cross Reference to Related Applications

[0002] This patent application claims priority to and benefit of Indian Patent Application No. 202041042490, filed September 30, 2020, which is assigned to the assignee hereof and is hereby expressly incorporated by reference in its entirety as if fully set forth below and for all applicable purposes. TECHNICAL FIELD

[0003] The technology discussed below relates generally to wireless communication networks, and more particularly, to adaptively performing tracking loop updates in a discontinuous reception mode. BACKGROUND

[0004] In wireless communication systems, such as those specified under the standards of 5G New Radio (NR), a user equipment (UE) can operate in a discontinuous reception (DRX) mode. The DRX mode allows the UE to remain in a low power state, such as a sleep state, for a period of time. Between sleep periods, the UE can wake up (e.g., perform a power-up operation) to enter an active state and communicate with the network. The UE can enter the DRX mode in a radio resource control (RRC) connected state (connected mode DRX (C-DRX)) or an RRC idle state (idle mode DRX (I-DRX)). In C-DRX, the UE can be configured with a DRX ON duration and a DRX OFF duration. During the DRX ON duration, the UE can wake up and monitor a physical downlink control channel (PDCCH) and transmit or receive user data traffic. In I-DRX, the UE can periodically wake up during a DRX ON duration to receive a page based on a paging cycle.

[0005] In the C-DRX mode or the I-DRX mode, when data arrives at the UE’s outgoing buffer, the UE can receive an internal wake-up request to perform a rude wake-up event when the UE is in a low power state. For example, the rude wake-up event can include transmitting a random access channel (RACH) message in the I-DRX mode or transmitting a scheduling request (SR) in the C-DRX mode. Prior to the rude wake-up event, the UE can schedule one or more tracking loops during a warm-up period to improve UE performance. For example, the UE can schedule a time tracking loop (TTL), a frequency tracking loop (FTL), and / or other tracking loops. SUMMARY

[0006] The following presents a summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated features of the disclosure, and is intended neither to identify key or critical elements of all aspects nor to delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a form preliminary to the more detailed description that is presented later.

[0007] In one example, a user equipment (UE) configured for wireless communication includes a wireless transceiver, a memory, and a processor coupled to the wireless transceiver and the memory. The processor and the memory can be configured to enter a sleep state for a sleep period in a discontinuous reception (DRX) mode, transition to an active state to perform a rude wake-up event during the sleep period, identify a time difference between a last tracking loop update and a warm-up occasion associated with the rude wake-up event, perform at least one tracking loop update during the warm-up occasion prior to performing the rude wake-up event in response to the time difference being greater than a threshold, and perform the rude wake-up event without performing the at least one tracking loop update in response to the time difference being less than or equal to the threshold.

[0008] Another example provides a method for wireless communication at a user equipment (UE). The method includes entering a sleep state for a sleep period in a discontinuous reception (DRX) mode, transitioning to an active state to perform a rude wake-up event during the sleep period, identifying a time difference between a last tracking loop update and a warm-up occasion associated with the rude wake-up event, performing at least one tracking loop update during the warm-up occasion prior to performing the rude wake-up event in response to the time difference being greater than a threshold, and performing the rude wake-up event without performing the at least one tracking loop update in response to the time difference being less than or equal to the threshold.

[0009] Another example provides a wireless communication device configured for wireless communication. The wireless communication device can include means for entering a sleep state for a sleep period in a discontinuous reception (DRX) mode, means for transitioning to an active state to perform a rude wake-up event during the sleep period, means for identifying a time difference between a last tracking loop update and a warm-up occasion associated with the rude wake-up event, means for performing at least one tracking loop update during the warm-up occasion prior to performing the rude wake-up event in response to the time difference being greater than a threshold, and means for performing the rude wake-up event without performing the at least one tracking loop update in response to the time difference being less than or equal to the threshold.

[0010] Another example provides an article of manufacture for use by a user equipment (UE) in a wireless communication network. The article of manufacture includes a computer-readable medium having stored therein instructions that, if executed by one or more processors of the UE, are to cause the UE to enter a sleep state for a sleep period in a discontinuous reception (DRX) mode, transition to an active state to perform a rude wake-up event during the sleep period, identify a time difference between a last tracking loop update and a warm-up occasion associated with the rude wake-up event, perform at least one tracking loop update during the warm-up occasion prior to performing the rude wake-up event in response to the time difference being greater than a threshold, and perform the rude wake-up event without performing the at least one tracking loop update in response to the time difference being less than or equal to the threshold.

[0011] These and other aspects of the application will become more fully understood upon reading the following detailed description in conjunction with the accompanying drawings. Further aspects, features, and examples will become apparent to those of ordinary skill in the art, upon reading the following description in conjunction with the accompanying figures. While features can be discussed relative to certain examples and figures below, all examples can include one or more of the advantageous features discussed herein. In other words, while one or more examples can be discussed as having certain advantageous features, one or more of such features can also be used in accordance with the various examples discussed herein. In a similar manner, different examples can be discussed as devices, systems, or methods. It should be understood that any such examples can be implemented in any of the following means (or combination thereof): BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a diagram of a wireless communication system in accordance with some aspects.

[0013] Figure 2 is a conceptual diagram of an example of a radio access network in accordance with some aspects.

[0014] Figure 3 is a diagram illustrating an example of a frame structure for use in a radio access network in accordance with some aspects.

[0015] Figure 4 is a diagram illustrating an example of idle mode discontinuous reception (I-DRX) in accordance with some aspects.

[0016] Figure 5 is a diagram illustrating an example of connected mode discontinuous reception (C-DRX) in accordance with some aspects.

[0017] Figure 6 is a diagram illustrating an example of a rude wake-up event during an I-DRX mode in accordance with some aspects.

[0018] Figure 7FIG. 1 is a diagram illustrating an example of a rough wake-up event during a C- DRX mode according to some aspects.

[0019] Figure 8 FIG. 2 is a diagram illustrating an example of adaptive tracking loop updates for a rough wake-up event during an I-DRX mode according to some aspects.

[0020] Figure 9 FIG. 3 is a diagram illustrating an example of adaptive tracking loop updates for a rough wake-up event during a C-DRX mode according to some aspects.

[0021] Figure 10 FIG. 4 is a block diagram illustrating an example of tracking loop update adaptation circuitry within a wireless communication device according to some aspects.

[0022] Figure 11 FIG. 5 is a block diagram illustrating an example of a hardware implementation for a wireless communication device employing a processing system according to some aspects.

[0023] Figure 12 FIG. 6 is a flow chart of an exemplary method for adaptive tracking loop updates in a wireless communication device according to some aspects.

[0024] Figure 13 FIG. 7 is a flow chart of an exemplary method for selecting a threshold value to perform adaptive tracking loop updates in a wireless communication device according to some aspects. DETAILED DESCRIPTION

[0025] The detailed description set forth below, in connection with the appended drawings and

[0026] While aspects and examples are described in this application by illustration to some examples, those skilled in the art will understand that additional implementations and use cases can come about in many different arrangements and scenarios. Innovations described herein can be implemented across many differing platform types, devices, systems, shapes, sizes, packaging arrangements, and the like. For example, examples and / or uses can come about in the context of integrated chip examples, and other non-module-component based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, AI-enabled devices, and the like). While some examples can or can not be specifically directed to a use case or application, a wide assortment of applicability of described innovations can come about. Implementations can range from chip-level or modular components to non-modular, non-chip-level implementations, to aggregated, distributed, or OEM devices or systems incorporating one or more aspects of the described innovations. In some physical settings, devices incorporating described aspects and features can also necessarily incorporate additional components and features for implementation and practice of examples protected and described herein. For example, transmission and reception of wireless signals necessarily incorporates a number of components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processor(s), interleavers, adders / summers, etc.). It is intended that innovations described herein can be practiced in devices of various sizes, shapes, and constitution, chip-level components, systems, distributed arrangements, disaggregated arrangements, end-user devices, etc.

[0027] Various aspects of the present disclosure relate to a UE adaptively performing tracking loop updates for rude wake-up events when operating in a discontinuous reception (DRX) mode. During a sleep period in the DRX mode, the UE can transition to an active state to perform a rude wake-up event. For example, when operating in an I-DRX mode, the UE can abruptly wake up from a sleep state upon uplink data arriving in a UE buffer to transmit a random access channel (RACH) message to the network to enter an RRC connected state. As another example, when operating in a C-DRX mode, the UE can abruptly wake up from a sleep state upon uplink data arriving in a UE buffer to transmit a scheduling request to the network.

[0028] Prior to performing the rude wake-up event, the UE can selectively perform one or more tracking loops, such as a time tracking loop (TTL) or a frequency tracking loop (FTL), at a warm-up occasion. In one aspect, the UE can perform the one or more tracking loops when a time difference between a last tracking loop update and the warm-up occasion associated with the rude wake-up event is greater than a threshold. However, when the time difference is less than or equal to the threshold, the UE can perform the rude wake-up event without performing the one or more tracking loop updates. In this example, the UE can utilize the last tracking loop update when performing the rude wake-up event.

[0029] In some examples, the threshold value of the threshold can be selected from a plurality of threshold values, each threshold value being associated with a respective cell quality mode of a cell in communication with the UE. The cell quality mode can include, for example, a cell good mode, a cell normal mode, or a cell panic mode. For example, a higher threshold value can be used in the cell good mode, while a lower threshold value can be utilized in the cell panic mode.

[0030] The various concepts presented throughout this disclosure can be implemented across a broad spectrum of telecommunication systems, network architectures, and communication standards. Referring now to the drawing, various aspects of the disclosure are illustrated by reference to Figure 1 With reference to the wireless communication system 100 as an illustrative example and not by way of limitation, various aspects of the disclosure are illustrated. The wireless communication system 100 includes three interacting domains: a core network 102, a radio access network (RAN) 104, and at least one user equipment (UE) 106. By virtue of the wireless communication system 100, the UE 106 can be enabled to carry out data communication with an external data network 110, such as (but not limited to) the Internet.

[0031] The RAN 104 can implement any suitable wireless communication technology or technologies to provide radio access to the UEs 106. As one example, the RAN 104 can operate according to 3rd Generation Partnership Project (3GPP) New Radio (NR) specifications, often referred to as 5G. As another example, the RAN 104 can operate under a hybrid of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, often referred to as LTE. The 3GPP refers to this hybrid RAN as a Next Generation RAN, or NG-RAN. Of course, many other examples can be utilized within the scope of the present disclosure.

[0032] As illustrated, the RAN 104 includes a plurality of base stations 108. Broadly, a base station is a network element in a radio access network that carries out the radio transmission and reception to and from UEs in one or more cells. In different technologies, standards, or contexts, a base station can variously be referred to as a base transceiver station (BTS), a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), an access point (AP), a Node B (NB), an eNode B (eNB), a gNode B (gNB), a transmission and reception point (TRP), or some other suitable terminology. In some examples, a base station can include two or more TRPs that can be collocated or non-collocated. Each TRP can communicate on the same or different frequency bands and on the same or different carrier frequencies, within the same or different cells. In examples where the RAN 104 operates according to both the LTE and 5G NR standards, one of the base stations can be an LTE base station, while another base station can be a 5G NR base station. Further, one or more of the base stations can have a disaggregated configuration.

[0033] Further shown is a radio access network (RAN) 104 that supports wireless communication for multiple mobile apparatuses. A mobile apparatus can also be referred to as a user equipment (UE) in 3GPP standards, but can also be referred to by those skilled in the art as a mobile station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology. A UE can be an apparatus that provides access to network services for a user.

[0034] In the present document, a “mobile” apparatus can not necessarily have a capability to move, and can be stationary. The term mobile apparatus or mobile device broadly refers to a diverse array of devices and technologies. UEs can include a number of hardware structural components sized, shaped, and arranged to help in communication; such components can include antennas, antenna arrays, RF chains, amplifiers, one or more processors, etc. electrically coupled to each other. For example, some non-limiting examples of a mobile apparatus include a mobile phone, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal computer (PC), a notebook, a netbook, a smartbook, a tablet, a personal digital assistant (PDA), and a broad array of embedded systems, for example corresponding to an “Internet of Things” (IoT).

[0035] A mobile apparatus can additionally be an automobile or other transportation vehicle, a remote sensor or actuator, a robot or robotic device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-copter, a quad-copter, a remote control device, a consumer audio device, a consumer video device, a satellite radio, a global positioning system, an object tracking device, a drone, a multi-copter, a quad-copter, a remote control device, a consumer and / or wearable device, such as eyewear, a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (e.g., MP3 player), a camera, a game console, etc. A mobile apparatus can additionally be a digital home or smart home device, such as a home audio, video, and / or multimedia device, a domestic appliance, a vending machine, intelligent lighting, a home security system, a smart meter, etc. A mobile apparatus can additionally be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device controlling electricity (e.g., a smart grid), lighting, water, etc.; an industrial automation and enterprise device; a logistics controller; agricultural equipment; etc. Still further, a mobile apparatus can provide for connected medicine or telemedicine support, i.e., health care at a distance. Telemedicine devices can include telemedicine monitoring devices and telemedicine management devices, whose communication can be given preferential treatment or prioritized access over other types of information, e.g., in terms of prioritized access for transmission of critical service data and / or related QoS for transmission of critical service data.

[0036] Wireless communication between a RAN 104 and a UE 106 can be described as utilizing an air interface. Transmissions by a base station, e.g., base station 108, to one or more UEs, e.g., similar to UE 106, can be referred to as downlink (DL) transmission. In accordance with certain aspects of the present disclosure, the term downlink can refer to a point-to-multipoint transmission originating at a base station, e.g., base station 108. Another way to describe this scenario can be to use the

[0037] In some examples, access to the air interface can be scheduled, where a scheduling entity (e.g., a base station 108) allocates resources (e.g., time- frequency resources) for communication among devices and equipment within its service area or cell. In the present disclosure, a scheduling entity can be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities (e.g., UEs 106). That is, for a scheduled communication, a multiple of UE 106, which can be scheduled entities, can utilize resources allocated by the scheduling entity (e.g., a base station 108).

[0038] Base station 108 is not the only entity that can act as a scheduling entity. That is, in some examples, a UE can act as a scheduling entity that schedules resources for one or more scheduled entities (e.g., one or more other UEs). For example, a UE can communicate directly with other UEs in a point-to-point or device-to-device manner and / or in a relay configuration.

[0039] like Figure 1 As shown, a scheduling entity (e.g., base station 108) can broadcast downlink service 112 to one or more scheduled entities (e.g., one or more UEs 106). Broadly speaking, a scheduling entity (such as base station 108) is a node or device responsible for scheduling services in a wireless communication network, including downlink service 112, and in some examples, uplink service 116 from one or more scheduled entities (e.g., one or more UEs 106) to the scheduling entity (e.g., base station 108). On the other hand, a scheduled entity (e.g., UE 106) is a node or device that receives downlink control information 114, including but not limited to scheduling information (e.g., authorization), synchronization or timing information, or other control information from another entity in the wireless communication network (such as the scheduling entity (e.g., base station 108)). A scheduled entity (e.g., UE 106) can also send uplink control information 118 (including but not limited to scheduling requests or feedback information) or other control information to the scheduling entity (e.g., base station 108).

[0040] Furthermore, downlink and / or uplink control information 114 and / or 118, and / or downlink and / or uplink traffic information 112 and / or 116 can be transmitted on a waveform that can be time-divided into frames, subframes, time slots, and / or symbols. As used herein, a symbol can refer to a time unit that carries one resource element (RE) on each subcarrier in an Orthogonal Frequency Division Multiplexing (OFDM) waveform. A time slot can carry 7 or 14 OFDM symbols. A subframe can refer to a duration of 1 ms. Multiple subframes or time slots can be combined to form a single frame or radio frame. In this disclosure, a frame can refer to a predetermined duration (e.g., 10 ms) for wireless transmission, wherein each frame consists of, for example, 10 subframes, each 1 ms in length. Of course, these definitions are not required, and any suitable scheme can be used to organize the waveform, and the various time divisions of the waveform can have any suitable duration.

[0041] Generally, the base stations 108 can include a backhaul interface for communication with a backhaul 120 of the wireless communication system. The backhaul 120 can provide a link between the base stations 108 and the core network 102. In addition, in some examples, the backhaul network can provide interconnection between respective base stations 108. Various types of backhaul interfaces can be employed, such as a direct physical connection, a virtual network, or the backhaul interface can use any suitable transport network.

[0042] The core network 102 can be a part of the wireless communication system 100, and can be independent of the radio access technology used in the RAN 104. In some examples, the core network 102 can be configured according to 5G standards (e.g., 5GC). In other examples, the core network 102 can be configured according to a 4G evolved packet core (EPC), or any other suitable standard or configuration.

[0043] Reference is now made to Figure 2 , a schematic diagram of a RAN 200 is provided by way of example, and not limitation. In some examples, the RAN 200 can be the same as the RAN 104 described above and illustrated in FIG. 1. Figure 1

[0044] The geographic region covered by the RAN 200 can be divided into a number of cells (cell areas), which can be uniquely identified and / or addressed by a base station identifying and / or addressing code broadcasted from one access point or base station over the geographic region. Figure 2 Cells 202, 204, 206, and 208 are illustrated, each of which can include one or more sectors (not shown). A sector is a sub-area of a cell. All sectors within a cell are served by the same base station. Radio links within a sector can be identified by a single logical identity belonging to that sector. In a cell divided into sectors, multiple sectors within a cell can be formed by a set of antennas, where each antenna is responsible for communication with UEs in a portion of the cell.

[0045] Various base station arrangements can be utilized. For example, in Figure 2 ​In particular embodiments, two base stations (base station 210 and base station 212) are shown in cells 202 and 204. A third base station (base station 214) is shown as controlling a remote radio head (RRH) 216 in cell 206. That is, a base station can have an integrated antenna, or can be connected with an antenna or RRH 216 through a feed cable. In the illustrated example, cells 202, 204, and 206 can be referred to as macrocells, as base stations 210, 212, and 214 support cells with a larger size. Further, base station 218 is shown in cell 208, which can overlap with one or more macrocells. In this example, cell 208 can be referred to as a small cell (e.g., a microcell, a picocell, a femtocell, a home base station, a home nodeB, a home eNodeB, etc.), as base station 218 supports a cell with a relatively small size. Cell size can be determined based on system design and component constraints.

[0046] It will be appreciated that RAN 200 can include any number of wireless base stations and cells. Further, relay nodes can be deployed to extend the size or coverage area of a given cell. Base stations 210, 212, 214, 218 provide wireless access points to a core network for any number of mobile apparatuses. In some examples, base stations 210, 212, 214, and / or 218 can be the same as or similar to scheduling entity 108 described above and illustrated in FIG. 1. Figure 1

[0047] Figure 2 Also included is an unmanned aerial vehicle (UAV) 220, which can be a drone or quadcopter. UAV 220 can be configured to function as a base station, or more specifically as a mobile base station. That is, in some examples, a cell can not necessarily be fixed, and the geographic area of a cell can move with the location of a mobile base station, such as UAV 220.

[0048] Within the RAN 200, cells can include UEs, which can be in communication with one or more sectors of each cell. Further, each base station 210, 212, 214, 218, and 220 can be configured to provide an access point to a core network 102 (see Figure 1 ) for all the UEs in the respective cells. For example, UEs 222 and 224 can be in communication with base station 210; UEs 226 and 228 can be in communication with base station 212; UEs 230 and 232 can be in communication with base station 214 through RRH 216; UE 234 can be in communication with base station 218; and UE 236 can be in communication with a mobile base station on UAV 220. In some examples, UEs 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, and / or 242 can be the same as or similar to scheduling entity 108 described above and illustrated in FIG. 1. Figure 1 ​The UEs / scheduled entities 106 illustrated in FIG. 1 are the same or similar to the UEs / scheduled entities 106. In some examples, a UAV 220 (e.g., quadcopter) can be a mobile network node and can be configured to function as a UE. For example, the UAV 220 can operate within the cell 202 by communicating with the base station 210.

[0049] In additional aspects of the RAN 200, sidelink signals can be used between UEs without necessarily relying on scheduling or control information from a base station. For example, in a device-to-device (D2D) network, a peer-to-peer (P2P) network, a vehicle-to-vehicle (V2V) network, a vehicle-to-anything (V2X) network, and / or other suitable sidelink network, sidelink communications can be utilized. For example, two or more UEs (e.g., UEs 238, 240, and 242) can communicate with each other using sidelink signals 237 without relaying this communication through a base station. In some examples, the UEs 238, 240, and 242 can each function as a scheduling entity or transmitting sidelink device, and / or a scheduled entity or receiving sidelink device to schedule resources and communicate sidelink signals 237 therebetween without relying on scheduling or control information from a base station. In other examples, two or more UEs (e.g., UEs 226 and 228) within the coverage area of a base station (e.g., base station 212) can also communicate sidelink signals 227 over a direct link (sidelink) without relaying this communication through the base station 212. In this example, the base station 212 can allocate resources to the UEs 226 and 228 for sidelink communication.

[0050] In some examples, a D2D relay framework can be included within a cellular network to facilitate relaying of communications to / from a base station 212 via a D2D link (e.g., sidelink 227 or 237). For example, one or more UEs (e.g., UE 228) within the coverage area of the base station 212 can operate as a relay UE to extend the coverage of the base station 212, improve transmission reliability to one or more UEs (e.g., UE 226), and / or allow the base station to recover from a UE link that has failed due to, for example, blockage or fading.

[0051] The air interface in the radio access network (RAN) 200 can utilize one or more multiplexing and multiple access algorithms to enable simultaneous communication of various devices. For example, 5G NR specifications utilize orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) (hereinafter also referred to as “CP-OFDM”) for downlink (DL) and uplink (UL) transmissions between the base stations 210 and the UEs 222 and 224. Further, for UL transmissions, the 5G NR specifications provide support for discrete Fourier transform spread OFDM (DFT-s-OFDM) (also referred to as single-carrier frequency division multiple access (SC-FDMA)). However, within the scope of the present disclosure, multiplexing and multiple access are not limited to the above schemes, and can be implemented, for example, using time division multiple access (TDMA), code division multiple access (CDMA), frequency division multiple access (FDMA), sparse code multiple access (SCMA), resource spread multiple access (RSMA), or other suitable multiple access schemes. Further, multiplexing downlink transmissions from the base stations 210 to the UEs 222 and 224 can be provided, for example, using time division multiplexing (TDM), code division multiplexing (CDM), frequency division multiplexing (FDM), orthogonal frequency division multiplexing (OFDM), sparse code multiplexing (SCM), or other suitable multiplexing schemes.

[0052] The air interface in the radio access network (RAN) 200 can utilize one or more duplexing algorithms. Duplex refers to a point-to-point communication link where both endpoints can communicate with one another. Full duplex means both endpoints can communicate with one another simultaneously. Half duplex means only one endpoint can send information to the other endpoint at a time. Half duplex analogies include typical human face-to-face and voice conversations, where typically only one person talks at a time. The “talking” is analogous to transmitting, and the “listening” is analogous to receiving. Half duplex analogies also includes typical walkie-talkie communications, where only one person can talk at a time. Similar to the face-to-face analogy, “talking” is analogous to transmitting, and “listening” is analogous to receiving. However, with digital wireless communications, the “talking” and “listening” can be simultaneous, which is analogous to full duplex. Full duplex can be achieved in wireless systems through the use of digital signal processing in the transmitter and / or receiver to cancel out the “noise” caused by the other endpoint of the communication link.

[0053] Reference will be made to the drawings, wherein: Figure 3Various aspects of the present disclosure are described in terms of example OFDM waveforms. Persons skilled in the art will recognize that aspects of the present disclosure can be applied in substantially the same manner to SC-FDMA waveforms. That is, while some examples of the present disclosure can focus on OFDM links for the sake of clarity, it should be understood that the same principles can apply to SC-FDMA waveforms as well.

[0054] Reference is now made to Figure 3 FIG. 3 shows a spread diagram of an example DL subframe 302, showing an OFDM resource grid. However, as those skilled in the art will readily appreciate, the structure for PHY transmissions for any particular application can differ from the examples described herein, depending on any number of factors. Herein, time is on the horizontal

[0055] The resource grid 304 can be used to schematically represent time-frequency resources for a given antenna port. That is, in multiple-input multiple-output (MIMO) implementations having multiple available antenna ports, a corresponding multiple number of resource grids 304 can be used for communication. The resource grid 304 is divided into multiple resource elements (REs) 306. An RE, which is 1 subcarrier x 1 symbol, is the smallest discrete part of the time-frequency grid, and contains a single complex value representing data from a physical channel or signal. Depending on the modulation, each RE can represent one or more information bits. In some examples, a block of REs can be referred to as a physical resource block (PRB) or a resource block (RB) 308, which contains any suitable number of consecutive subcarriers in the frequency domain. In one example, an RB can include 12 subcarriers, a number that is independent of the numerology used. In some examples, depending on the numerology, an RB can include any suitable number of consecutive OFDM symbols in the time domain. In the present disclosure, it is assumed that a single RB such as the RB 308 entirely corresponds to a single direction of communication (transmission or reception by a given device).

[0056] Scheduling of UEs (e.g., scheduled entities) or sidelink devices (hereinafter referred to generally as UEs or wireless communication devices) for downlink or uplink transmissions generally involves scheduling one or more resource elements (REs) 306 within one or more sub-bands or bandwidth parts (BWPs). Thus, a UE generally utilizes only a subset of the resource grid 304. In some examples, an RB can be the smallest unit of resources that can be allocated to a UE. Thus, the more RBs scheduled for a UE, and the higher the modulation scheme chosen for the air interface, the higher the data rate for the UE. The RBs can be scheduled by a base station (e.g., gNB, eNB, etc.) or can be self-scheduled by a UE / sidelink device implementing D2D sidelink communication.

[0057] In this illustration, RB 308 is shown as occupying less than the entire bandwidth of subframe 302, with some subcarriers shown above and below RB 308. In a given implementation, subframe 302 can have a bandwidth corresponding to any number of RB 308(s). Also, in this illustration, RB 308 is shown as occupying less than the entire duration of subframe 302, although this is merely one possible example.

[0058] Each 1ms subframe 302 can be made up of one or more contiguous time slots. In the illustrated example, one subframe 302 includes four time slots 310, as an illustrative example. In some examples, a time slot can be defined in terms of a specified number of OFDM symbols with a given cyclic prefix (CP) length. For example, a time slot can include 7 or 14 OFDM symbols with a nominal CP. Additional examples can include mini-slots, sometimes referred to as shortened transmission time intervals (TTIs), having a shorter duration (e.g., one to three OFDM symbols). These mini-slots or shortened transmission time intervals (TTIs) can in some cases be transmitted, occupying resources scheduled for ongoing slot transmissions for the same or different UEs. Any number of resource blocks can be utilized within a subframe or time slot. Figure 3

[0059] An expanded view of one of the time slots 310 illustrates a time slot 310 including a control region 312 and a data region 314. Generally, the control region 312 can carry control channels and the data region 314 can carry data channels. Of course, the time slot can contain all DL, all UL, or at least one DL portion and at least one UL portion. Figure 3 The structures illustrated in FIG. 3 are merely exemplary and other slot structures can be utilized, including one or more of each of the control region(s) and data region(s).

[0060] Although not illustrated in FIG. 3, the various REs 306 within a RB 308 can be scheduled to carry one or more physical channels, including control channels, shared channels, data channels, etc. Other REs 306 within a RB 308 can also carry pilots or reference signals. These pilots or reference signals can provide for the receiving device to perform channel estimation on the corresponding channel, which can enable coherent demodulation / detection of the control and / or data channels within the RB 308. Figure 3

[0061] ​​In some examples, the time slots 310 can be utilized for broadcast or unicast communications. For example, a broadcast, multicast, or groupcast communication can refer to a point-to-multipoint transmission by one device (e.g., a base station, UE, or other similar device) to other devices. Here, a broadcast communication is transmitted to all devices, while a multicast communication is transmitted to multiple intended receiving devices. A unicast communication can refer to a point-to-point transmission by one device to a single other device.

[0062] In examples of cellular communications over a cellular carrier via a Uu interface, for DL transmissions, a scheduling entity (e.g., a base station) can allocate (e.g., within the control region 312) one or more REs 306 to carry DL control information including one or more DL control channels, such as a physical downlink control channel (PDCCH), to one or more scheduled entities (e.g., UEs). The PDCCH carries downlink control information (DCI) including but not limited to power control commands (e.g., one or more open loop power control parameters and / or one or more closed loop power control parameters), scheduling information, grants, and / or an assignment of REs for DL and UL transmissions. The PDCCH can also carry HARQ feedback transmissions, such as an acknowledgment (ACK) or negative acknowledgment (NACK). HARQ is a technique well-known by those of ordinary skill in the art, wherein the integrity of packet transmissions can be checked at the receiving side for accuracy, e.g., utilizing any suitable integrity checking mechanism, such as a checksum or a cyclic redundancy check (CRC). If the integrity of the transmission is confirmed, an ACK can be sent, whereas if not confirmed, a NACK can be sent. In response to the NACK, the transmitting device can issue a HARQ retransmission, which can implement soft combining, incremental redundancy, etc.

[0063] The base station can also allocate (e.g., within the control region 312 or data region 314) one or more REs 306 to carry other DL signals such as demodulation reference signals (DMRs); phase-tracking reference signals (PT-RS); channel state information (CSI) reference signals (CSI-RS); and synchronization signal blocks (SSBs). The SSBs can be broadcasted at a fixed interval based on a periodicity (e.g., 5, 10, 20, 40, 80, or 160 ms). The SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast control channel (PBCH). The PSS and SSS can be utilized by a UE to achieve synchronization in the time domain to radio frames, subframes, slots, and symbols, identify a center of a channel (system) bandwidth in the frequency domain, and identify a physical cell identity (PCI) of a cell.

[0064] The PBCH in the SSB can also include a master information block (MIB) that includes various system information along with parameters for decoding a system information block (SIB). For example, the SIB can be a SystemInformationType 1 (SIB1) that can include various additional system information. Examples of system information transmitted in the MIB can include, but are not limited to, a subcarrier spacing, a system frame number, a configuration of a PDCCH control resource set (CORESET) (e.g., PDCCH CORESET0), and a search space for SIB1. Examples of additional system information transmitted in the SIB1 can include, but are not limited to, a random access search space, downlink configuration information, and uplink configuration information. The MIB and SIB1 together provide the minimum system information (SI) for initial access.

[0065] In UL transmissions, a scheduled entity (e.g., UE) can utilize one or more REs 306 to carry UL control information (UCI) including one or more UL control channels, such as a physical uplink control channel (PUCCH), to the scheduling entity. UCI can include a variety of groupings and categories of information including pilots, reference signals, and information configured to enable or assist in decoding uplink data transmissions. In some examples, UCI can include a scheduling request (SR), i.e., requesting the scheduling entity to schedule uplink transmissions. Here, in response to the SR transmitted on the UCI, the scheduling entity can transmit downlink control information (DCI) that can schedule resources for uplink packet transmissions. UCI can also include HARQ feedback, channel state feedback (CSF) such as a CSI report, or any other suitable UCI.

[0066] In addition to control information, one or more REs 306 (e.g., within data region 314) can be allocated for data traffic. Such data traffic can be carried on one or more traffic channels, such as, for DL transmissions, a physical downlink shared channel (PDSCH); or for UL transmissions, a physical uplink shared channel (PUSCH). In some examples, one or more REs 306 within data region 314 can be configured to carry other signals, such as one or more SIBs and DMRSs.

[0067] In the example of sidelink communication over a sidelink carrier via a PC5 interface, the control region 312 of the slot 310 can include a physical sidelink control channel (PSCCH) including sidelink control information (SCI) transmitted by an initiating (transmitting) sidelink device (e.g., a Tx V2X device or other Tx UE) toward a set of one or more other receiving sidelink devices (e.g., Rx V2X devices or other Rx UEs). The data region 314 of the slot 310 can include a physical sidelink shared channel (PSSCH) including sidelink data traffic transmitted by the initiating (transmitting) sidelink device within resources reserved by the transmitting sidelink device over the sidelink carrier via the SCI. Other information can further be transmitted over various REs 306 within the slot 310. For example, HARQ feedback information can be transmitted from the receiving sidelink device to the transmitting sidelink device in a physical sidelink feedback channel (PSFCH) within the slot 310. In addition, one or more reference signals such as a sidelink SSB, a sidelink CSI-RS, a sidelink SRS, and / or a sidelink positioning reference signal (PRS) can be transmitted within the slot 310.

[0068] The physical channels described above are generally multiplexed and mapped to transport channels for processing at the medium access control (MAC) layer. Transport channels carry blocks of information known as transport blocks (TBs). The transport block size (TBS) can correspond to a number of information bits and can be a controlled parameter based on a modulation and coding scheme (MCS) and a number of RBs in a given transmission.

[0069] The above description refers to Figures 1 to 3 The described channels or carriers are not necessarily all the channels or carriers that can be utilized between a scheduling entity and a scheduled entity, and those skilled in the art will recognize that other channels or carriers, such as other traffic, control, and feedback channels, can be utilized in addition to the illustrated channels or carriers.

[0070] Transmission of data traffic from a base station to a UE can occur within the downlink OFDM symbols of a subframe or slot. The base station can indicate to the UE that the base station has data to transmit to the UE by transmitting scheduling information that provides the time-frequency resources (e.g., REs) allocated by the base station for transmitting data to the UE. For example, the scheduling information can be included within the DCI of the PDCCH transmitted at the beginning of a subframe or slot. The UE can monitor the PDCCH in each subframe or slot to determine whether a downlink data transmission has been scheduled for the UE. However, since the UE can not receive data in every subframe or slot, the PDCCH monitoring process can result in high battery consumption.

[0071] To reduce power consumption and extend battery life, a wireless communication device (e.g., a UE) can enter a discontinuous reception (DRX) mode. The DRX mode allows the wireless communication device to enter a sleep state (e.g., a low power state) for a period of time. The wireless communication device can then periodically wake up (e.g., perform a power-up operation) to communicate with a base station. The periodic repetition of the cycle between the sleep state and the active state is referred to herein as DRX. DRX can be implemented by any type of wireless communication device, but can be a preferred mode for machine-type communication (MTC) devices, such as narrowband Internet of Things (NB-IoT) devices, or other types of reduced capability devices.

[0072] A wireless communication device can enter the DRX mode in a radio resource control (RRC) connected state (connected mode DRX (C-DRX)) or an RRC idle state (idle mode DRX (I-DRX)). The base station can configure various parameters for the I-DRX mode and the C-DRX mode and provide the DRX parameters to the UE through an upper layer RRC reconfiguration message (e.g., during handover) or through one or more SIBs (e.g., during initial attach).

[0073] Figure 4 FIG. 1 is a diagram illustrating an example of idle mode discontinuous reception (I-DRX) according to some aspects. A wireless communication device (e.g., a UE) can enter the I-DRX mode during an RRC idle mode when the UE is not connected to a base station. For example, during initial cell access, the UE can receive a SIB (e.g., SIB2) that includes DRX parameters for the I-DRX mode. The UE can then transition to an RRC idle state and enter the I-DRX mode to conserve power.

[0074] The DRX idle mode (I-DRX) is characterized by a number of consecutive DRX cycles 402 in time (t). The duration of each DRX cycle 402 can correspond to a paging cycle, for example, set by the network. For example, the paging cycle can be defined in terms of radio frames, and the UE can calculate a paging frame and a paging occasion within the paging frame of the UE based on the paging cycle. Here, the paging frame corresponds to a radio frame in which the UE can wake up to receive a paging. Further, the paging occasion corresponds to a subframe in which a paging message for the UE can be received. In one DRX cycle 402, each UE has only one paging occasion.

[0075] In Figure 4In the illustrated example, each DRX cycle 402 includes a DRX ON duration 404 and a DRX OFF duration 406. Here, the DRX cycle length (or DRX cycle duration) is equal to the time between the start of one DRX ON duration 404 and the start of the next DRX ON duration 404. The DRX OFF duration 406 corresponds to an inactive period in which the wireless communication device does not communicate with the wireless communication network. Thus, during the DRX OFF duration 406, the wireless communication device can enter a sleep state or low power state for a sleep period corresponding to the DRX OFF duration 406 to reduce power consumption. In some examples, the DRX OFF duration 406 can be 320 ms, 640 ms, 1280 ms, or 2560 ms.

[0076] Upon entering the DRX ON duration 404, the wireless communication device wakes up by performing a power-up operation to enter an active state. The DRX ON duration 404 can include a paging time window 410 containing paging occasions in which the wireless communication device can receive a paging message. For example, each paging time window 410 can follow a normal paging cycle (e.g., 1.28 seconds) used in the wireless communication network. If the wireless communication device receives a page during the paging time window 410, the wireless communication device can transition to an RRC connected state to receive a downlink data transmission from the base station, and then re-transition back to the RRC idle state after receiving the downlink data transmission. At the end of the paging time window 410 or upon transitioning back to the RRC idle state, the wireless communication device can again enter a sleep state or low power state for the DRX OFF duration 406.

[0077] Before each paging time window 410 (e.g., before the subframe number (SFN) of the paging occasion at which the wireless communication device wakes up), the wireless communication device can schedule and perform one or more tracking loop updates 408 during a warm-up occasion 412. For example, the wireless communication device can perform a time tracking loop (TTL) update, a frequency tracking loop (FTL) update, a power delay profile (PDP) estimation update, and / or an automatic gain control (AGC) update procedure during the warm-up occasion 412. For example, by implementing a TTL, the wireless communication device can be able to correct timing errors and optimize the starting point of a fast Fourier transform (FFT) window to minimize inter-symbol interference (ISI). The FTL can enable the wireless communication device to correct for carrier frequency offset due to RF impairments at both the wireless communication device and the base station, and can further enable the wireless communication device to correct for Doppler shift due to mobility of the wireless communication device. In addition, the wireless communication device can perform a PDP estimation to compensate for power dispersion or distribution over various paths due to multipath propagation. The wireless communication device can also perform various AGC procedures to control the level or gain of a received signal in order to minimize the block error rate (BLER) of the received signal.

[0078] In some examples, the wireless communication device can receive a reference signal transmitted by the base station for tracking loop updates, such as a channel state information-reference signal (CSI-RS) or a synchronization signal block (SSB). The SSB can be transmitted within a cell with a known periodicity (e.g., 20 ms). Thus, in some examples, the warm-up occasion 412 can occur before the known SSB transmission time before the wake-up time of the paging time window 410.

[0079] Figure 5 FIG. 19 is a diagram illustrating an example of connected mode discontinuous reception (C-DRX) according to some aspects. A wireless communication device (e.g., a UE) can enter a C-DRX mode during an RRC connected mode when the UE is connected to a base station. For example, during initial cell access, the UE can receive a SIB (e.g., SIB2) that includes DRX parameters for a C-DRX mode. In some examples, the UE can request a DRX cycle length during an initial attach procedure.

[0080] The DRX connected mode (C-DRX) is characterized by a number of consecutive DRX cycles 502 in time (t). Depending on the C-DRX configuration, the duration of each DRX cycle 502 can correspond to, for example, a long DRX cycle or a short DRX cycle. In some examples, the C-DRX configuration can be configured by a network (e.g., a base station) or can be configured by the UE. Figure 5In the illustrated example, each DRX cycle 402 includes a DRX ON duration 504 and a DRX OFF duration 506. Here, the DRX cycle length (or DRX cycle duration) is equal to the time between the start of one DRX ON duration 504 and the start of the next DRX ON duration 504. The DRX OFF duration 506 corresponds to an inactive period in which the wireless communication device does not communicate with the wireless communication network (e.g., the wireless communication device does not transmit any information to or receive any information from the wireless communication network). Thus, during the DRX OFF duration 506, the wireless communication device can enter a sleep state or low power state for a sleep period corresponding to the DRX OFF duration 506 to reduce power consumption. In some examples, the DRX OFF duration 506 can be 40 ms, 80 ms, 160 ms, or 320 ms.

[0081] Upon entering the DRX ON duration 504, the wireless communication device wakes up by performing a power-up operation to enter an active state. The DRX ON duration 504 can include a PDCCH monitoring window 510 in which the wireless communication device monitors for transmissions of PDCCH from the base station to the wireless communication device. If the wireless communication device receives a PDCCH 514 during the PDCCH monitoring window 510, the wireless communication device can start a DRX inactivity timer 516 that specifies a duration for which the wireless communication device should remain in the active state after receiving the PDCCH 514. In some examples, depending on when the PDCCH 514 is received during the PDCCH monitoring window 510, the DRX inactivity timer 516 can extend the DRX ON duration 504, as illustrated. Figure 5 At the end of the DRX ON duration 504, the wireless communication device can again enter a sleep state or low power state for the DRX OFF duration 506.

[0082] Before each PDCCH monitoring window 510 (e.g., before the subframe number (SFN) of the subframe in which the wireless communication device is configured to wake up), the wireless communication device can schedule and perform one or more tracking loop updates 508 during a warm-up occasion 512. For example, as described above, the wireless communication device can perform TTL updates, FTL updates, PDP estimation updates, and / or AGC update procedures during the warm-up occasion 512. In some examples, the wireless communication device can receive reference signals transmitted by the base station for tracking loop updates, such as channel state information-reference signals (CSI-RS) or synchronization signal blocks (SSBs). SSBs can be transmitted within a cell with a known periodicity (e.g., 20 ms). Thus, in some examples, the warm-up occasion 512 can occur at a known SSB transmission time before the wake-up time of the DRX ON duration 504.

[0083] Figure 6 FIG. 6 is a diagram illustrating an example of a rough wake-up event during an I- DRX mode, in accordance with some aspects. Similar to FIG. 5, the rough wake-up event can occur when the wireless communication device is scheduled to wake up at a time that is not aligned with a tracking loop update occasion. In the example shown, the rough wake-up event occurs at a time that is not aligned with a tracking loop update occasion, such as a TTL update occasion 614a, a FTL update occasion 614b, a PDP estimation update occasion 614c, or an AGC update occasion 614d. In some examples, the rough wake-up event can occur at a time that is not aligned with a tracking loop update occasion, such as a TTL update occasion 614a, a FTL update occasion 614b, a PDP estimation update occasion 614c, or an AGC update occasion 614d. Figure 4 , a DRX idle mode (I-DRX) is characterized by a number of consecutive DRX cycles 602 within a time (t). The duration of each DRX cycle 602 can correspond to a paging cycle, for example, set by the network. Each DRX cycle 602 includes a DRX ON duration 604 corresponding to a wake-up period in which the wireless communication device is in an active state, and a DRX OFF duration 606 corresponding to a sleep period in which the wireless communication device is in a sleep state. Each DRX ON duration 604 can include a respective paging time window 610 containing a paging occasion in which the wireless communication device can receive a paging message. In the example shown, two paging time windows 610a and 610b are shown for convenience. Before each paging time window 610a and 610b, the wireless communication device can perform a respective tracking loop update 608a and 608c within a respective warm-up occasion 612. Figure 6

[0084] ​During the DRX OFF duration 606, data can arrive in the uplink buffer of the wireless communication device to be transmitted to the base station. In some examples, the data can be urgent data (e.g., data associated with a particular application or quality of service (QoS)) that needs to be delivered to the base station before the next DRX ON duration 604. To facilitate the transmission of the uplink data to the base station, the wireless communication device can initiate a rude wake-up event 614 to wake up (e.g., perform a power-up operation) during a sleep period (e.g., during the DRX OFF duration 606) and send a random access channel (RACH) message (e.g., msgl in a four-step RACH procedure or msgA in a two-step RACH procedure) to the network to connect to the base station (e.g., RRC connection setup) and obtain an uplink grant for the transmission of the uplink data. Prior to the rude wake-up event 614, the wireless communication device can schedule and perform one or more additional tracking loop updates 608b (e.g., TTL and / or FTL updates) during a respective warm-up occasion 612.

[0085] Figure 7 FIG. 6 is a diagram illustrating an example of a rude wake-up event during a C- DRX mode in accordance with some aspects. Similar to Figure 5 DRX connected mode (C-DRX) is characterized by a number of consecutive DRX cycles 702 within a time (t). Depending on the C-DRX configuration, the duration of each DRX cycle 702 can correspond to, for example, a long DRX cycle or a short DRX cycle. Each DRX cycle 702 includes a DRX ON duration 704 corresponding to a wake-up period in which the wireless communication device is in an active state and a DRX OFF duration 706 corresponding to a sleep period in which the wireless communication device is in a sleep state. Each DRX ON duration 704 can include a respective PDCCH monitoring window in which the wireless communication device can monitor a PDCCH from a base station that is destined for the wireless communication device. In the example shown, two PDCCH monitoring windows 710a and 710b are shown for convenience. Prior to each PDCCH monitoring window 710a and 710b, the wireless communication device can perform a respective tracking loop update 708a and 708e within a respective warm-up occasion 712. Figure 7

[0086] ​During the DRX OFF duration 706, data can arrive in the uplink buffer of the wireless communication device to be transmitted to the base station. In some examples, the data can be urgent data (e.g., data associated with a particular application or quality of service (QoS)) that needs to be communicated to the base station prior to the next DRX ON duration 704. To facilitate the transmission of the uplink data to the base station, the wireless communication device can initiate a rude wake-up event 714a to wake up (e.g., perform a power-up operation) during a sleep period (e.g., during the DRX OFF duration 706) and send a scheduling request (e.g., within UCI of a PUCCH) to the base station to obtain an uplink grant for the transmission of the uplink data. Prior to the rude wake-up event 714a, the wireless communication device can schedule and perform one or more additional tracking loop updates 708b (e.g., TTL and / or FTL updates) during a corresponding warm-up occasion 712.

[0087] In some examples, the wireless communication device can perform multiple rude wake-up events 714a, 714b, and 714c during a sleep period (e.g., the DRX OFF duration 706), depending on the amount and periodicity of uplink data to be transmitted. In this example, the wireless communication device can likewise perform a corresponding tracking loop update 708b, 708c, and 708d prior to each rude wake-up event 714a, 714b, and 714c. For example, multiple rude wake-up events 714a, 714b, and 714c can occur during a long DRX cycle.

[0088] The additional tracking loop updates 708b, 708c, and 708d performed prior to each rude wake-up event 714a, 714b, and 714c in C-DRX mode, and the additional tracking loop update 608b performed prior to each rude wake-up event 614 in I-DRX mode, can impact the performance and power consumption of the wireless communication device. For example, the extra warm-up tracking loop updates performed in I-DRX mode can increase the control plane latency (e.g., the time between RACH Trigger and RRC Setup Complete) of the wireless communication device and impact the battery life of the wireless communication device. As another example, in C-DRX mode, when there are back-to-back rude wake-up events 714a, 714b, and 714c, as Figure 7As shown, the wireless communication device schedules additional SSBs to perform tracking loop updates 708b, 708c, and 708d, respectively, prior to each rude wake-up event 712a, 712b, and 712c, which can increase the Layer 1 (L1) timeline and impact the battery life of the wireless communication device. Moreover, in I-DRX mode or C-DRX mode, the additional tracking loop updates performed prior to rude wake-up events can undesirably increase the wake-up time of the wireless communication device.

[0089] Accordingly, in various aspects of the disclosure, the wireless communication device can adaptively or selectively perform tracking loop updates for rude wake-up events to improve performance and reduce power consumption. In one aspect, the wireless communication device can perform one or more tracking loops when a time difference between a last tracking loop update and a warm-up occasion associated with a rude wake-up event is greater than a threshold. However, the wireless communication device can perform the rude wake-up event without performing one or more tracking loop updates when the time difference is less than or equal to the threshold, thereby reducing control plane latency and minimizing wake-up time. In this example, the UE can utilize the last tracking loop update when performing the rude wake-up event.

[0090] In some examples, the threshold value of the threshold can be selected based on a cell quality mode. For example, the cell quality mode can be a cell good mode, a cell normal mode, or a cell panic mode. The cell quality mode can be determined, for example, based on a measured signal-to-noise ratio (SNR) of a reference signal (e.g., SSB or CSI-RS) transmitted by a base station in a cell serving the wireless communication device. For example, the wireless communication device can measure the SNR of an SSB during a last tracking loop update and utilize the measured SNR to determine the cell quality mode of the cell. In some examples, the threshold value can be higher for a cell good mode and lower for a cell panic mode.

[0091] Figure 8 FIG. 7 is a diagram illustrating an example of adaptive tracking loop updates for rude wake-up events during I-DRX mode, in accordance with some aspects. Similar to FIG. 6, the wireless communication device 702 can be configured to operate in an I-DRX mode, and the base station 704 can be configured to transmit a rude wake-up event 712a, 712b, or 712c to the wireless communication device 702. In this example, the rude wake-up event 712a, 712b, or 712c can be associated with a warm-up occasion 716a, 716b, or 716c, respectively. Figure 4 and 6 DRX idle mode (I-DRX) is characterized by a number of consecutive DRX cycles 802 within a time (t). The duration of each DRX cycle 802 can correspond to, for example, a paging cycle set by the network. Each DRX cycle 802 includes a DRX ON duration 804 corresponding to a wake-up period in which the wireless communication device is in an active state and a DRX OFF duration 806 corresponding to a sleep period in which the wireless communication device is in a sleep state. Each DRX ON duration 804 can include a respective paging time window 810 containing paging occasions in which the wireless communication device can receive a paging message. In this example, the wireless communication device can be configured to perform a tracking loop update 708a, 708b, or 708c prior to each rude wake-up event 712a, 712b, or 712c, respectively.Figure 8 In the illustrated example, two paging time windows 810a and 810b are shown for convenience. Prior to each paging time window 810a and 810b, the wireless communication device can perform a respective tracking loop update 808a and 808c within a corresponding warm-up occasion 812.

[0092] During the DRX OFF duration 806, the wireless communication device can initiate a rude wake-up event 814 to wake up (e.g., perform a power-up operation) during a sleep period (e.g., during the DRX ON duration 806) and transmit a random access channel (RACH) message to a base station. Prior to the rude wake-up event 814, the wireless communication device can adaptively or selectively schedule and perform one or more additional tracking loop updates 808b (e.g., TTL and / or FTL updates) during a corresponding warm-up occasion 812. By adaptively performing tracking loop updates, the wireless communication device can not have to perform tracking loop updates prior to a wake-up subframe number (SFN) (e.g., ON time) of each rude wake-up event 814.

[0093] In one aspect, the wireless communication device can identify a time difference 816 between a last tracking loop update 808a performed by the wireless communication device and a warm-up occasion 812 within which additional tracking loop update(s) 808b for the rude wake-up event 814 can be performed. For example, the time difference 816 can correspond to a time difference between an end of the last tracking loop update 808a performed and a start of the additional tracking loop update(s) 808b for the rude wake-up event 814 (e.g., ON time). The wireless communication device can then compare the time difference 816 to a threshold to determine whether to schedule and perform the additional tracking loop update(s) 808b. In some examples, the threshold can be a factory setting on the wireless communication device. For example, the threshold can be set by a 3GPP standard or specification and stored (e.g., hard-coded) on the wireless communication device. In other examples, the threshold can be configured and transmitted to the wireless communication device by a base station.

[0094] In some examples, when the time difference 816 is greater than the threshold, the wireless communication device can continue to perform the additional tracking loop update(s) 808b during the warm-up occasion 812 prior to the rude wake-up event 814. However, when the time difference 816 is less than or equal to the threshold, the wireless communication device can perform the rude wake-up event 814 without performing the additional tracking loop update(s) 808b. In this example, the wireless communication device will not schedule or perform one or more additional tracking loop updates 808b, and can utilize the last tracking loop update(s) 808a to perform the rude wake-up event 814 (e.g., the wireless communication device can apply the results of the last tracking loop update(s) 808a to update the tracking loop(s) for the current rude wake-up event 814). In an example where the SSB periodicity is 20 ms, when the wireless communication device does not schedule or perform the tracking loop update(s) 808b for the current rude wake-up event 814 (e.g., skips the tracking loop update(s) 808b), the wake-up timeline of the wireless communication device can be reduced by up to 20 ms.

[0095] In some examples, the wireless communication device can select a threshold value of the threshold from a plurality of threshold values. The wireless communication device can select the threshold value based on, for example, at least one reference signal (e.g., SSB or CSI-RS) received from a cell in wireless communication with the wireless communication device during the last tracking loop update 808a. For example, each threshold value can be associated with a respective cell quality mode of the cell. The cell quality mode can include, for example, a cell good mode, a cell normal mode, or a cell panic mode. The wireless communication device can determine the cell quality mode of the cell based on the at least one reference signal, and select the threshold value of the threshold based on the cell quality mode. For example, the wireless communication device can measure the SNR of the at least one reference signal, and determine the cell quality mode based on the at least one reference signal.

[0096] In one example, when the SNR is above 6 dB, the wireless communication device can determine that the cell quality mode of the cell is the cell good mode. Further, when the SNR is between -4 dB and 6 dB, the wireless communication device can determine that the cell quality mode of the cell is the cell normal mode. Further, when the SNR is below -4 dB, the wireless communication device can determine that the cell quality mode is the cell panic mode.

[0097] In one example, the threshold value associated with the cell good mode can be 320 ms, the threshold value associated with the cell normal mode can be 160 ms, and the threshold value associated with the cell panic mode can be 80 ms. Thus when the wireless communication device determines that the cell quality mode is the cell normal mode (e.g., based on the SNR of the at least one reference signal measured during the last tracking loop update 808a), the wireless communication device can perform the rude wake-up event 814 without performing one or more additional tracking loop updates 808b when the time difference 816 between the completion of the last tracking loop update 808a and the scheduled ON time 808b of performing the additional tracking loop update is less than or equal to 160 ms. Thus, when the last tracking loop update 808a occurs within 160 ms of the next scheduled ON time of the warm-up occasion 812 associated with the rude wake-up event 814, the wireless communication device will not perform the additional tracking loop update(s) 808b. The wireless communication device can then update the tracking loop (e.g., TTL and / or FTL) of the rude wake-up event 814 with the results from the last tracking loop update 808a.

[0098] Figure 9 FIG. 1 is a diagram illustrating an example of adaptive tracking loop updates for rude wake-up events during a C-DRX mode, in accordance with some aspects. Similar to Figure 5 and 7 DRX connected mode (C-DRX) is characterized by a number of consecutive DRX cycles 902 in time (t). Depending on the C-DRX configuration, the duration of each DRX cycle 902 can correspond to, for example, a long DRX cycle or a short DRX cycle. Each DRX cycle 902 includes a DRX ON duration 904 corresponding to a wake-up period in which the wireless communication device is in an active state and a DRX OFF duration 906 corresponding to a sleep period in which the wireless communication device is in a sleep state. Each DRX ON duration 904 can include a respective PDCCH monitoring window in which the wireless communication device can monitor a PDCCH from a base station that is destined for the wireless communication device. In Figure 9 In the example shown, two PDCCH monitoring windows 910a and 910b are shown for convenience. Prior to each PDCCH monitoring window 910a and 910b, the wireless communication device can perform a respective tracking loop update 908a and 908e within a respective warm-up occasion 912.

[0099] During the DRX OFF duration 906, the wireless communication device can initiate one or more rude wake-up events, three of which are shown for convenience 914a, 914b, and 914c. During each rude wake-up event 914a, 914b, and 914c, the wireless communication device can abruptly wake up from sleep (e.g., perform a power-up operation) during a sleep period (e.g., during the DRX OFF duration 906) to transmit, for example, a scheduling request to a base station. Prior to each rude wake-up event 914a, 914b, and 914c, the wireless communication device can adaptively or selectively schedule and perform one or more additional tracking loop updates 908b, 908c, and 908d (e.g., TTL and / or FTL updates) during a corresponding warm-up occasion 912. By adaptively performing the tracking loop update(s), the wireless communication device can not have to perform a tracking loop prior to the wake-up subframe number (SFN) (e.g., ON time) of each rude wake-up event 914a, 914b, and 914c.

[0100] In Figure 9 In the example shown, for the first rude wake-up event 914a, the wireless communication device can determine that a time difference 916a between the last tracking loop update 908a and the warm-up occasion 912 associated with the first rude wake-up event 914a is less than or equal to a threshold. Accordingly, the wireless communication device can perform the first rude wake-up event 914a without performing the additional tracking loop update(s) 908b. Thus, the wireless communication device can skip the additional tracking loop update(s) 908b and perform the first rude wake-up event 914a with the last tracking loop update(s) 908a (e.g., the wireless communication device can apply the results of the last tracking loop update(s) 908a to update the tracking loop(s) of the first rude wake-up event 914a).

[0101] For the second rude wake-up event 914b, since no tracking loop update(s) were performed for the first rude wake-up event 914a, the wireless communication device can consider the last tracking loop update(s) relative to the second rude wake-up event 914b to be the tracking loop update(s) 908a performed for the first PDDCH monitoring window 910a. In this example, the wireless communication device can determine that a time difference 916b between the last tracking loop update(s) 908b and the warm-up occasion 912 associated with the second rude wake-up event 914b is greater than the threshold. Accordingly, the wireless communication device can schedule and perform one or more tracking loop updates 908c during a corresponding warm-up occasion 912 prior to performing the second rude wake-up event 914b to update the tracking loop(s) (e.g., TTL and / or FTL) of the second rude wake-up event 914b.

[0102] For the third rude wake-up event 914c, since the tracking loop update(s) were performed for the second rude wake-up event 914b, the wireless communication device can treat the last tracking loop update(s) relative to the third rude wake-up event as the tracking loop update(s) 908c performed for the second rude wake-up event 914b. In this example, the wireless communication device can determine that the time difference 916c between the last tracking loop update(s) 908c and the warm-up occasion 912 associated with the third rude wake-up event 914c is less than or equal to the threshold. Accordingly, the wireless communication device can perform the third rude wake-up event 914c without performing additional tracking loop update(s) 908d. Thus, the wireless communication device can skip the additional tracking loop update(s) 908d and perform the third rude wake-up event 914c with the last tracking loop update(s) 908c (e.g., the wireless communication device can apply the results of the last tracking loop update(s) 908c to update the tracking loop(s) of the third rude wake-up event 914c).

[0103] In Figure 9 In the example shown, the wireless communication device can select the threshold value of the threshold from the plurality of threshold values based on the determined cell quality mode of the cell. For example, the wireless communication device can select from a first threshold value associated with a cell excellent mode, a second threshold value associated with a cell normal mode, and a first threshold value associated with a cell panic mode.

[0104] Figure 10 is a block diagram illustrating an example of tracking loop update adaptation circuitry 1000 within a wireless communication device (e.g., a UE) according to some aspects. The tracking loop update adaptation circuitry 1000 can include cell quality mode identification circuitry 1002, threshold selection circuitry 1004, time difference calculation circuitry 1006, and tracking loop update circuitry 1008. The tracking loop update adaptation circuitry 1000 can also be coupled to rude wake-up circuitry 1010 and a memory 1012 storing one or more threshold values 1014.

[0105] In one example, the tracking loop update circuit 1008 can be configured to update at least one tracking loop (e.g., TTL and / or FTL) during a warm-up occasion preceding a scheduled subframe in which the wireless communication device can wake up during an I-DRX mode or a C-DRX mode based on a DRX parameter 1024 received from a network (e.g., a base station serving the wireless communication device). The DRX parameter 1024 can indicate a DRX cycle between a DRX ON duration and a DRX OFF duration. The tracking loop update circuit 1008 can determine a warm-up occasion for each scheduled DRX ON duration based on the DRX parameter 1024. For example, the tracking loop update circuit 1008 can determine an ON time of the warm-up occasion to perform tracking loop update based on the DRX parameter 1024. The tracking loop update circuit 1008 can also be configured to receive at least one reference signal 1026 from a cell (e.g., a base station) in wireless communication with the wireless communication device and utilize the at least one reference signal 1026 in updating one or more tracking loops.

[0106] The rude wake-up circuit 1010 can be configured to trigger the wireless communication device to rudely wake up to perform a rude wake-up event during a sleep period (e.g., a DRX OFF duration) of the wireless communication device. In an I-DRX mode, the rude wake-up event can include sending a RACH message (e.g., msgl or msgA) to a base station. In a C-DRX mode, the rude wake-up event can include sending a scheduling request. The rude wake-up circuit 1010 can also be configured to schedule a rude wake-up event time to perform the rude wake-up event. For example, the scheduled rude wake-up event time can correspond to a subframe (e.g., SFN) in which the rude wake-up event can occur (e.g., a SFN in which the wireless communication device transitions to an active state or an ON state to perform the rude wake-up event).

[0107] The cell quality mode identification circuit 1002 can be configured to obtain a measurement 1016 of at least one reference signal (e.g., SSB or CSI-RS). The measurement 1016 can be, for example, a SNR measurement of the at least one reference signal. In some examples, the SNR measurement 1016 can be obtained during a tracking loop update performed by the tracking loop update circuit 1008. The cell quality mode identification circuit 1002 can also be configured to determine a cell quality mode 1018 based on the SNR measurement 1016. In some examples, the determined cell quality mode 1018 can be selected from a cell good mode, a cell normal mode, or a cell panic mode. For example, the cell quality mode identification circuit 1002 can select the cell good mode when the SNR measurement 1016 is above (greater than) 6 dB, the cell normal mode when the SNR measurement 1016 is between -4 dB and 6 dB, and the cell panic mode when the SNR measurement 1016 is below (less than) -4 dB. In some examples, the cell quality mode identification circuit 1002 can be configured to receive the measurement 1016 from the tracking loop update circuit 1008 or other circuit (not shown) during or after performing the last tracking loop update.

[0108] The threshold selection circuit 1004 can be configured to access a memory 1012 to retrieve a threshold value 1014 associated with the cell quality mode 1018, and utilize the retrieved threshold value 1014 of the threshold 1020 for adaptively performing the tracking loop update. For example, the threshold selection circuit 1004 can retrieve a threshold value 1014 of 320 ms when the cell quality mode 1018 is the cell good mode, a threshold value 1014 of 160 ms when the cell quality mode 1018 is the cell normal mode, and a threshold value 1014 of 80 ms when the cell quality mode 1018 is the cell panic mode.

[0109] The time difference calculation circuit 1006 can be configured to receive the threshold 1020 from the threshold selection circuit 1004. The time difference calculation circuit 1006 can also be configured to receive a last tracking loop update time 1028 of the last tracking loop update performed by the tracking loop update circuit 1008. For example, the tracking loop update circuit 1008 can be configured to identify the last tracking loop update time 1028 as a time at which the tracking loop update circuit 1008 completes the last tracking loop update(s). The last tracking loop update can have been performed prior to a DRX ON duration or prior to a rude wake-up event.

[0110] The time difference computation circuitry 1006 can also be configured to receive, from the coarse wake-up circuitry 1010, a scheduled tracking loop update time 1030 for a coarse wake-up event to be performed. For example, the coarse wake-up circuitry 1010 can be further configured to determine the scheduled tracking loop update time 1030 based on the scheduled coarse wake-up event time. In one example, the scheduled tracking loop update time 1030 can correspond to a time (e.g., ON time) at which the wireless communication device can power up during a warm-up opportunity prior to the scheduled coarse wake-up event time (e.g., prior to performing the coarse wake-up event) to perform one or more tracking loop updates.

[0111] The time difference computation circuitry 1006 can also be configured to determine a time difference between the scheduled tracking loop update time 1030 for the coarse wake-up event and the last tracking loop update time 1028 of the last tracking loop update. The time difference computation circuitry 1006 can then be configured to compare the time difference to a threshold 1020 and generate and provide an indication (or instruction) 1032 to the tracking loop update circuitry 1008 indicating whether the tracking loop update circuitry 1008 can perform the scheduled tracking loop update(s) for the coarse wake-up event. For example, when the time difference is greater than the threshold 1020, the indication 1032 provided to the tracking loop update circuitry 1008 can indicate to perform the scheduled tracking loop update(s) within the respective warm-up opportunity of the coarse wake-up event. As another example, when the time difference is less than or equal to the threshold 1020, the indication 1032 provided to the tracking loop update circuitry 1008 can indicate not to perform (e.g., skip) the scheduled tracking loop update(s) for the coarse wake-up event.

[0112] The tracking loop update circuitry 1008 can also be configured to provide a result 1034 of the tracking loop update(s) to the coarse wake-up circuitry 1010 for performing the coarse wake-up event. In examples where the indication 1032 provided from the time difference computation circuitry 1006 to the tracking loop update circuitry 1008 indicates not to perform the scheduled tracking loop update(s) for the coarse wake-up event, the result 1034 provided by the tracking loop update circuitry 1008 to the coarse wake-up circuitry 1010 can include a last result from the last (previous) tracking loop update(s) performed by the tracking loop update circuitry 1008. Otherwise, the result 1034 can include a current result from the current (scheduled) tracking loop update(s) performed by the tracking loop update circuitry 1008 for the coarse wake-up event.

[0113] Figure 11 FIG. 11 is a diagram illustrating an example of a hardware implementation for an example wireless communication device 1100 employing a processing system 1114. For example, the wireless communication device 1100 can be a base station, a mobile device, or some other suitable wireless communication device as described herein. Figure 1、 2 , any one or more of 5, 8, and / or 9.

[0114] The wireless communication device 1100 can be implemented with a processing system 1114 that includes one or more processors 1104. Examples of processors 1104 include microprocessors, microcontrollers, digital signal processors (DSPs), field-programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. In various examples, the wireless communication device 1100 can be configured to perform any one or more of the functions described herein. That is, the processor 1104, as utilized in a wireless communication device 1100, can be capable of implementing any one or more of the processes described and illustrated in FIGS. 1-8, and elsewhere herein. Figure 11

[0115] In some instances, the processor 1104 can be implemented via a baseband or modem chip, and in other implementations, the processor 1104 can include multiple devices distinct and different from a baseband or modem chip (e.g., that can work in conjunction to implement examples discussed herein). Also as noted above, various hardware arrangements and components other than baseband modem processors can be used in implementations, including RF chains, power amplifiers, modulators, buffers, interleavers, adders / summers, etc.

[0116] In this example, the processing system 1114 can be implemented with a bus architecture, generally represented by bus 1102. The bus 1102 can include any number of interconnecting buses and bridges, depending on the specific application of the processing system 1114 and the overall design constraints. The bus 1102 communicatively couples various circuits including one or more processors (generally represented by processor 1104), memory 1105, and computer-readable media (generally represented by computer-readable media 1106). The bus 1102 can also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art, and therefore, will not be described any further. A bus interface 1108 provides an interface between the bus 1102 and a transceiver 1110. The transceiver 1110 provides a communication path for communications with various other apparatus over a transmission medium (e.g., an over-the-air interface). Depending on the nature of the wireless communication device 1100 (e.g., an Internet of Things device, an enhanced mobile broadband (eMBB) device, an ultra-reliable low-latency communication (URLLC) device, a reduced capability device, etc.), an optional user interface 1112 (e.g., keyboard, display, speaker, microphone, joystick) can also be provided and connected to the bus 1102 via the bus interface 1108.​

[0117] The processor 1104 is responsible for managing the bus 1102 and general processing, including the execution of software stored on the computer-readable medium 1106. The software, when executed by the processor 1104, causes the processing system 1114 to perform the various functions described below for any particular apparatus. The computer-readable medium 1106 and the memory 1105 can also be used for storing data that is manipulated by the processor 1104 when executing software.

[0118] One or more processors in the processing system can execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. The software can reside on a computer-readable medium 1106.

[0119] The computer-readable medium 1106 can be a non-transitory computer-readable medium. A non-transitory computer-readable medium includes, by way of example, a magnetic storage device (e.g., hard disk, floppy disk, magnetic strips), an optical disk (e.g., compact disk (CD), digital versatile disk (DVD)), a smart card, a flash memory device (e.g., card, stick, or key drive), a random access memory (RAM), a read-only memory (ROM), a programmable ROM (PROM), an erasable PROM (EPROM), an electrically erasable PROM (EEPROM), a register, a removable disk, and any other suitable medium for storing software and / or instructions that can be accessed and read by a computer. The computer-readable medium 1106 can reside in the processing system 1114, external to the processing system 1114, or distributed across multiple entities including the processing system 1114. The computer-readable medium 1106 can be embodied in a computer program product. In some examples, the computer-readable medium 1106 can be part of the memory 1105. By way of example, a computer program product can include a computer-readable medium in packaging material. Those skilled in the art will recognize how to best implement the described functionality presented throughout this disclosure based on the particular application and the overall design constraints imposed on the entire system.

[0120] In some aspects of the disclosure, the processor 1104 can include circuitry configured for various functions. For example, the processor 1104 can include communication and processing circuitry 1142 configured to communicate with a base station (e.g., gNB, eNB, or other TRP) or a cell (e.g., TRP) served by a base station. In some examples, the communication and processing circuitry 1142 can include one or more hardware components that provide the physical structure that performs processing related to wireless communication (e.g., signal reception and / or signal transmission) and signal processing (e.g., processing a received signal and / or processing a signal for transmission).

[0121] In some examples, the communication and processing circuitry 1142 can be configured to receive and process at least one reference signal from a base station, e.g., during a tracking loop update procedure. The communication and processing circuitry 1142 can also be configured to receive a paging message from a base station during a DRX ON duration in an I-DRX mode or receive a PDCCH from a base station during a DRX ON duration in a C-DRX mode. The communication and processing circuitry 1142 can also be configured to transmit a RACH message for a rude wake-up event during a sleep period in an I-DRX mode or transmit a scheduling request for a rude wake-up event during a sleep period in a C-DRX mode. The communication and processing circuitry 1142 can also be configured to execute communication and processing instructions (software) 1152 stored in the computer-readable medium 1106 to implement one or more functions described herein.

[0122] The processor 1104 can also include DRX circuitry 1144 configured to implement an I-DRX mode or a C-DRX mode on the wireless communication device 1100. In the I-DRX mode, the DRX circuitry 1144 can determine a DRX cycle including a DRX ON duration and a DRX OFF duration. The DRX cycle can be determined based on a DRX parameter received from a base station, for example. When entering the DRX ON at a system time corresponding to a start of the DRX ON duration, the DRX circuitry 1144 can be configured to wake up the wireless communication device 1100 to enter an active state (e.g., an awake state). For example, the DRX circuitry 1144 can be configured to control the power source 1130 to perform a power-up operation of one or more components of the wireless communication device 1100 (e.g., the transceiver 1110) to enable monitoring and receiving of a paging message during the DRX ON duration. At an end of the DRX ON duration at a system time corresponding to a start of the DRX OFF duration, the DRX circuitry 1144 can be further configured to control the power source 1130 to perform a power-down operation of the one or more components of the wireless communication device 1100 to enter a sleep state.

[0123] In C-DRX mode, the DRX circuitry 1144 can determine a DRX cycle including a DRX ON duration and a DRX OFF duration. The DRX cycle can be determined based on a DRX parameter received from a base station, for example. The DRX circuitry 1144 can be configured to wake up the wireless communication device 1100 to enter an active state (e.g., an awake state) when entering DRX ON at a system time corresponding to a start of the DRX ON duration. For example, the DRX circuitry 1144 can be configured to control the power supply 1130 to perform a power up operation of one or more components of the wireless communication device 1100 (e.g., the transceiver 1110) to enable monitoring and reception of PDCCHs during the DRX ON duration. The DRX circuitry 1144 can be further configured to control the power supply 1130 to perform a power down operation of the one or more components of the wireless communication device 1100 to enter a sleep state at the end of the DRX ON duration at a system time corresponding to a start of the DRX OFF duration. The DRX circuitry 1144 can also be configured to execute DRX instructions (software) 1154 stored in the computer-readable medium 1106 to implement one or more functions described herein.

[0124] The processor 1104 can also include a tracking loop update adaptation circuitry 1146 configured to adaptively perform one or more tracking loop updates. In some examples, the tracking loop update circuitry 1146 can correspond to the tracking loop update adaptation circuitry 1000 shown in FIG. 10. In some examples, the tracking loop update adaptation circuitry 1146 can be configured to perform one or more tracking loop updates during a warm-up occasion prior to an ON time (e.g., a start SFN) of a DRX ON duration of a DRX cycle in an I-DRX mode or a C-DRX mode. The tracking loop update adaptation circuitry 1146 can also be configured to perform one or more tracking loop updates during a warm-up occasion prior to an ON time (e.g., a start SFN) of a coarse wake-up event during a sleep period (e.g., an OFF duration) of a DRX cycle in the I-DRX mode or the C-DRX mode. In some examples, the tracking loop update(s) can include at least one of a time tracking loop (TTL) or a frequency tracking loop (FTL). Figure 10

[0125] In some examples, the tracking loop update adaptation circuitry 1146 can be configured to receive at least one reference signal from a cell (e.g., a base station) in wireless communication with the wireless communication device 1100. The at least one reference signal can include an SSB or a CSI-RS. The tracking loop update adaptation circuitry 1146 can be configured to perform one or more tracking loop updates with the at least one reference. ​

[0126] The tracking loop update adaptation circuit 1146 can also be configured to identify (e.g., compute) a time difference between the last tracking loop update and the warm-up occasion associated with the rude wake-up event. The tracking loop update adaptation circuit 1146 can also be configured to compare the time difference to a threshold 1122, which can be stored in the memory 1105, for example. The threshold 1122 can be preconfigured on the wireless communication device, for example (e.g., a factory setting of the wireless communication device). When the time difference is less than the threshold 1122, the tracking loop update adaptation circuit 1146 can be configured to not perform (e.g., skip) the tracking loop update(s) for the rude wake-up event. When the time difference is greater than or equal to the threshold 1122, the tracking loop update adaptation circuit 1146 can be configured to perform one or more tracking loop updates during the warm-up occasion prior to performing the rude wake-up event.

[0127] In some examples, the tracking loop update adaptation circuit 1146 can be configured to select the threshold value 1120 for the threshold 1122 from a plurality of threshold values 1120 stored in the memory 1105, for example. The threshold values 1120 can be preconfigured on the wireless communication device, for example (e.g., a factory setting of the wireless communication device). In some examples, the tracking loop update adaptation circuit 1146 can be configured to select the threshold value 1120 based on at least one reference signal received from the cell during the last tracking loop update. For example, the tracking loop update adaptation circuit 1146 can be configured to determine a cell quality mode for the cell based on the at least one reference signal, and select the threshold value 1120 for the threshold 1122 based on the cell quality mode. In some examples, the tracking loop update adaptation circuit 1146 can be configured to obtain an SNR of the at least one reference signal received during the last tracking loop update, and determine the cell quality mode based on the SNR. For example, the cell quality mode can be one of a cell good mode, a cell normal mode, or a cell panic mode. The tracking loop update adaptation circuit 1146 can also be configured to execute tracking loop adaptation instructions (software) 1156 stored in the computer-readable medium 1106 to implement one or more functions described herein.

[0128] The processor 1104 can also include a rude wake-up circuit 1148 configured to trigger a rude wake-up of the wireless communication device to transition the wireless communication device to an active state (e.g., an awake state) during a sleep period (e.g., a DRX OFF duration) of a DRX cycle. For example, the rude wake-up circuit 1148 can be configured to control the power supply 1130 to perform a power-up operation of one or more components (e.g., the transceiver 1110) of the wireless communication device 1100 to enable the rude wake-up circuit 1148 to operate in conjunction with the communication and processing circuit 1142 and the transceiver 1110 to perform a rude wake-up event. In one example, the rude wake-up event can include sending a RACH message to a cell to transition to an RRC connected mode when the wireless communication device is in an I-DRX mode. As another example, the rude wake-up event can include sending a scheduling request to a cell when the wireless communication device is in a C-DRX mode. In some examples, the rude wake-up circuit 1148 can monitor an uplink buffer (not shown) to determine when to trigger the rude wake-up event.

[0129] In some examples, the rude wake-up circuit 1148 can be configured to utilize a current tracking loop update associated with the rude wake-up event performed by the tracking loop update adaptation circuit 1146, or a last tracking loop update associated with a DRX ON duration or a previous rude wake-up event performed by the tracking loop update adaptation to perform the rude wake-up event. The rude wake-up circuit 1148 can also be configured to execute rude wake-up instructions (software) 1158 stored on the computer-readable medium 1106 to implement one or more functions described herein.

[0130] Figure 12 is a flow diagram 1200 of an exemplary method for adaptive tracking loop update in a wireless communication device according to some aspects. As described below, some or all of the features illustrated in the figure can be omitted in some implementations, and some illustrated features can not be required in all implementations. In some examples, the method can be performed by the wireless communication device (e.g., UE) 1100 as described above and Figure 11 as shown in FIG. 1200, by a processor or processing system, or by any suitable means for carrying out the described functions.

[0131] At block 1202, the wireless communication device can enter a sleep state of a sleep period in a discontinuous reception (DRX) mode. In some examples, the DRX mode can be an I-DRX mode or a C-DRX mode. For example, the DRX power circuit 1144 shown and described above in connection with Figure 11 may provide the means for entering the sleep state.

[0132] At block 1204, the wireless communication device can transition to an active state (e.g., a wake-up state) to perform a rude wake-up event during the sleep period. In some examples, the rude wake-up event can include transmitting a random access channel (RACH) message (e.g., msgl or msgA) to a cell in wireless communication with the wireless communication device in response to a DRX mode including an I-DRX mode to transition to a radio resource control (RRC) connected mode. In other examples, the rude wake-up event can include transmitting a scheduling request to the cell in response to a DRX mode including a C-DRX mode. For example, the rude wake-up event is described above in connection with block 1202. Figure 11 The rude wake-up circuitry 1148 shown and described can provide a means to transition the wireless communication device to an active state.

[0133] At block 1206, the wireless communication device can identify a time difference between the last tracking loop update and the rude wake-up event. For example, the time difference is described above in connection with block 1204. Figure 11 The tracking loop update adaptation circuitry 1146 shown and described can provide a means to identify the time difference.

[0134] At block 1208, the wireless communication device can determine whether the time difference is greater than a threshold. In some examples, the threshold can be a factory setting on the wireless communication device. For example, the threshold is described above in connection with block 1206. Figure 11 The tracking loop update adaptation circuitry 1146 shown and described can determine whether the time difference is greater than the threshold.

[0135] In response to the time difference being greater than the threshold (Y branch of block 1208), at block 1210, the wireless communication device can perform at least one tracking loop update during a warm-up occasion associated with the rude wake-up event. In some examples, the at least one tracking loop update can include at least one of a time tracking loop (TTL) update or a frequency tracking loop (FTL) update. In some examples, the wireless communication device can receive at least one reference signal from a cell in wireless communication with the wireless communication device and utilize the at least one reference signal to perform the at least one tracking loop update. In some examples, the at least one reference signal includes a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS). For example, the at least one tracking loop update is described above in connection with block 1208. Figure 11 The tracking loop update adaptation circuitry 1146 shown and described can provide a means to perform the at least one tracking loop update during the warm-up occasion associated with the rude wake-up event.

[0136] At block 1212, the wireless communication device can then perform a rude wake-up event. For example, the wireless communication device can transmit a RACH message in an I-DRX mode, or a scheduling request in a C-DRX mode. In this example, the wireless communication device can perform the rude wake-up event with the tracking loop update(s) performed at block 1210. For example, the rude wake-up circuit 1148 shown and described above in connection with FIG. 11 can provide a means for performing the rude wake-up event. Figure 11 The rude wake-up circuit 1148 shown and described can provide a means for performing the rude wake-up event.

[0137] In response to the time difference being less than or equal to the threshold (N branch of block 1208), at block 1212, the wireless communication device can perform the rude wake-up event without performing at least one tracking loop update at block 1210. In this example, the wireless communication device can perform the rude wake-up event with the last tracking loop update. For example, the rude wake-up circuit 1148 shown and described above in connection with FIG. 11 can provide a means for performing the rude wake-up event without performing at least one tracking loop update. Figure 13 The rude wake-up circuit 1148 shown and described can provide a means for performing the rude wake-up event without performing at least one tracking loop update.

[0138] Figure 11 is a flowchart 1300 of an exemplary method for selecting a threshold value to perform adaptive tracking loop updates in a wireless communication device according to some aspects. As described below, some or all of the illustrated features can be omitted in particular implementations within the scope of the present disclosure, and some illustrated features can not be required for implementation in all examples. In some examples, the method can be performed by the wireless communication device (e.g., UE) 1100, as described above and shown in FIG. 11, and as described below. Figure 11 is performed by a processor or processing system, or by any suitable means for performing the function.

[0139] At block 1302, the wireless communication device can obtain a measurement of at least one reference signal received from a cell. In some examples, the measurement is a signal-to-noise ratio (SNR) measurement. In some examples, the at least one reference signal can be received during a last tracking loop update performed by the wireless communication device. For example, the at least one reference signal can comprise an SSB or a CSI-RS. For example, the tracking loop update adaptation circuit 1146 shown and described above in connection with FIG. 11 can provide a means for obtaining the measurement. Figure 11 The tracking loop update adaptation circuit 1146 shown and described can provide a means for obtaining the measurement.

[0140] At block 1304, the wireless communication device can determine a cell quality mode of the cell based on the measurement. In some examples, the cell quality mode can comprise a cell good mode, a cell normal mode, or a cell panic mode. For example, the tracking loop update adaptation circuit 1146 shown and described above in connection with FIG. 11 can provide a means for determining the cell quality mode of the cell. Figure 11 The tracking loop update adaptation circuit 1146 shown and described can provide a means for determining the cell quality mode of the cell.

[0141] At block 1306, the wireless communication device can select a threshold value for a threshold used to adaptively or selectively perform a coarse wake-up event based on the cell quality pattern. In some examples, the threshold value can be selected from a plurality of threshold values, each threshold value being associated with one of the cell quality patterns. For example, the threshold values can be selected as described above in connection with Figure 11 The tracking loop update adaptation circuitry 1146 shown and described above can provide a means for selecting a threshold value for a threshold.

[0142] In one configuration, the wireless communication device 1100 includes means for adaptively performing the tracking loop updates described in the present disclosure. In one aspect, the aforementioned means can be the processor 1104 configured as discussed in connection with Figure 12 In another aspect, the aforementioned means can be circuitry or any means configured to perform the functions recited by the aforementioned means. As one example, the processor 1104, shown in FIG. 11 as being configured to perform the functions recited by the aforementioned means, can be used to perform such functions in one or more aspects. The processor 1104, shown in FIG. 11 as being configured to perform various functions in connection with the means for adaptively performing the tracking loop updates described in the present disclosure can be one or more processors 1104. As one example, in

[0143] Of course, in the above examples, the circuitry included in the processor 1104 is merely provided as an example, and other means for performing the described functions can be included within aspects of the present disclosure, including but not limited to the instructions stored in the computer-readable medium 1106, or any suitable apparatus or means Figure 13 and Figure 1 described herein in connection with the process and / or algorithms described herein. Figures 1-13 , 2 and / or any other suitable means for performing the functions described herein.

[0144] The following provides an overview of examples of the present disclosure.

[0145] Example 1 : A method for wireless communication at a user equipment (UE), the method comprising: entering a sleep state for a sleep period in a discontinuous reception (DRX) mode; transitioning to an active state to perform a coarse wake-up event during the sleep period; identifying a time difference between a last tracking loop update and a warm-up occasion associated with the coarse wake-up event; performing at least one tracking loop update during the warm-up occasion prior to performing the coarse wake-up event in response to the time difference being greater than a threshold, and performing the coarse wake-up event without performing the at least one tracking loop update in response to the time difference being less than or equal to the threshold.

[0146] Example 2: The method of example 1, wherein performing the at least one tracking loop update further comprises: performing at least one of a time tracking loop (TTL) update or a frequency tracking loop (FTL) update.

[0147] Example 3: The method of example 1 or 2, wherein performing the at least one tracking loop update further comprises: receiving at least one reference signal from a cell in wireless communication with the UE, wherein the at least one reference signal comprises a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS); and performing the at least one tracking loop update with the at least one reference signal.

[0148] Example 4: The method of any one of examples 1-3, further comprising: selecting the threshold value for the threshold based on at least one reference signal received from a cell in wireless communication with the UE during the last tracking loop update.

[0149] Example 5: The method of any one of examples 1-4, wherein selecting the threshold value comprises: determining a cell quality mode for the cell based on the at least one reference signal; and selecting the threshold value for the threshold based on the cell quality mode.

[0150] Example 6: The method of example 5, wherein the cell quality mode comprises a cell good mode, a cell normal mode, or a cell panic mode.

[0151] Example 7: The method of example 5 or 6, wherein determining the cell quality mode further comprises: obtaining a signal-to-noise ratio (SNR) measurement of the at least one reference signal; and determining the cell quality mode based on the SNR measurement.

[0152] Example 8: The method of any one of examples 1-7, wherein performing the rude wake-up event without performing the at least one tracking loop update comprises: performing the rude wake-up event with the last tracking loop update.

[0153] Example 9: The method of any one of examples 1-8, wherein the threshold is a factory setting on the UE.

[0154] Example 10: The method of any one of examples 1-9, wherein the rude wake-up event comprises: transmitting a random access channel (RACH) message to a cell in wireless communication with the UE to transition to a radio resource control (RRC) connected mode in response to the DRX mode comprising an idle DRX mode; or transmitting a scheduling request to the cell in response to the DRX mode comprising a connected DRX mode.

[0155] Example 11: A wireless communication device configured for wireless communication comprising: a wireless transceiver, a memory, and a processor coupled to the wireless transceiver and the memory, the processor and the memory configured to perform the method of any one of examples 1-10.

[0156] Example 12: A wireless communication device in a wireless communication network comprising at least one means for performing a method of any one of Examples 1-10.

[0157] Example 13: An article of manufacture for use by a user equipment (UE) in a wireless communication network, the article of manufacture comprising a computer-readable medium having stored therein instructions that, if executed by one or more processors of the UE, enable performance of a method of any of Examples 1-10.

[0158] Several aspects of a wireless communication network have been presented with reference to the example implementations. As those skilled in the art will readily appreciate, various aspects described throughout this disclosure can be extended to other telecommunication systems, network architectures and communication standards.

[0159] By way of example, various aspects can be implemented within other systems defined by 3GPP such as Long-Term Evolution (LTE), Evolved Packet System (EPS), the Universal Mobile Telecommunication System (UMTS), and / or the Global System for Mobile Communications (GSM). Various aspects can also be implemented within systems defined by the 3rd Generation Partnership Project 2 (3GPP2), such as CDMA2000 and / or Evolution-Data Optimized (EV-DO). Other examples can be implemented within systems employing IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth, and / or other suitable systems. The actual telecommunication standard, network architecture, and / or communication standard employed will depend on the specific application and the overall design constraints imposed on the system.

[0160] In this disclosure, the word “exemplary” is used to mean “serving as an example, instance, or illustration.” Any implementation or aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects of the disclosure. Likewise, the term “aspects” does not require that all aspects of the disclosure include the discussed feature, advantage or mode of operation. The term “coupled” is used herein to express a direct or indirect coupling between two objects. For example, if object A physically touches object B, and object B touches object C, then objects A and C can still be considered coupled to one another — even if they do not directly physically touch one another. For instance, a first object can be coupled to a second object even though the first object is never directly physically in contact with the second object. The terms “circuit” and “circuitry” are used broadly, and intended to include both hardware implementations of electrical devices and conductors that couple the electrical devices in a way to enable the performance of a function described in this disclosure, as well as software implementations of information and instructions that, when executed by a processor, enable the performance of a function described in this disclosure, without limitation to a particular type of circuitry.

[0161] Figure 1 One or more of the components, steps, features and / or functions illustrated in the Figures can be rearranged and / or combined into a single component, step, feature or function or embodied by several components, steps, or functions. Additional elements, components, steps, and / or functions can also be added or made optional by the skilled person depending on the design choices, while still falling within the scope of the novel features disclosed herein. ​ 、 2 The apparatuses, devices, and / or components illustrated in Figures 10 and 11 can be configured to perform one or more of the methods, features, or steps described herein. The novel algorithms described herein can also be efficiently implemented in software and / or embedded in hardware.

[0162] It will be understood that the specific order or hierarchy of steps in the methods disclosed is an illustration. Based upon implementation-dependent considerations such as, for example, design choice, the specific order or hierarchy of steps in the methods can be re-arranged. The accompanying method claims set forth in sample order present elements of the various steps in the claims in a sample order, and are not meant to be limiting as to the specific order or hierarchy of steps.

[0163] The previous 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 readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown herein, but is to be accorded the full scope consistent with the language of the claims, wherein reference to an element in the singular is not intended to mean "one and only one" unless specifically so stated, but rather "one or more." Unless specifically stated otherwise, the term "some" refers to one or more. Phrases such as "at least one of' or "one or more of' a list followed by a list of items do not modify the list as a whole, but instead should be interpreted to mean that at least one of the items of the list is present, and that one or more of the items can be present. For example, "at least one of a, b, and c" or "one or more of a, b, and c" would show the open-ended possibility that a, b, or c and any combination thereof, can be present. To the extent that the term "includes" is used in either the detailed description or the claims, it is intended to be inclusive in a manner similar to the term "comprising" as equivalent terminology. Furthermore, the disclosure of a single item, includes the disclosure of multiple items unless otherwise specified. All structural and functional equivalents to the elements of the various aspects described throughout this disclosure that are known or later come to be known to one of ordinary skill in the art are expressly incorporated by reference and intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether these disclosure elements are explicitly recited in the claims.

Claims

1. A wireless communication device configured for wireless communication, comprising: Wireless transceiver; Memory; as well as A processor coupled to the wireless transceiver and the memory, wherein the processor and the memory are configured as follows: In discontinuous reception DRX mode, it enters a sleep state during the sleep period; The system switches to an active state to execute a rough wake-up event during the sleep period, wherein the rough wake-up event is sending a random access channel RACH message in idle mode DRX I-DRX or sending a scheduling request SR in connected mode DRX C-DRX. The time difference between the last tracking loop update and the warm-up timing associated with the abrupt wake-up event is identified; In response to the time difference exceeding a threshold, at least one tracking loop update is performed during the warm-up period before the abrupt wake-up event is executed, and In response to the time difference being less than or equal to the threshold, the abrupt wake-up event is executed without performing the at least one tracking loop update.

2. The wireless communication device according to claim 1, wherein, The processor and the memory are further configured to: Perform at least one of the following: a time-tracking loop TTL update or a frequency-tracking loop FTL update.

3. The wireless communication device according to claim 1, wherein, The processor and the memory are further configured to: At least one reference signal is received from a cell communicating wirelessly with the wireless communication device, wherein the at least one reference signal includes a Synchronization Signal Block (SSB) or a Channel State Information Reference Signal (CSI-RS); and The at least one tracking loop update is performed using the at least one reference signal.

4. The wireless communication device according to claim 1, wherein, The processor and the memory are further configured to: The threshold value is selected from a plurality of threshold values ​​based on at least one reference signal received from a cell communicating with the wireless communication device during the last tracking loop update.

5. The wireless communication device according to claim 4, wherein, The processor and the memory are further configured to: The cell quality mode of the cell is determined based on the at least one reference signal; and The threshold value of the threshold is selected based on the cell quality model.

6. The wireless communication device according to claim 5, wherein, The community quality mode includes excellent community mode, normal community mode, or panic community mode.

7. The wireless communication device according to claim 5, wherein, The processor and the memory are further configured to: Obtain the signal-to-noise ratio (SNR) measurement of the at least one reference signal; and The cell quality pattern is determined based on the SNR measurement.

8. The wireless communication device according to claim 1, wherein, The processor and the memory are further configured to: The abrupt wake-up event is executed using the last tracking loop update.

9. The wireless communication device according to claim 1, wherein, The threshold is a factory setting on the wireless communication device.

10. The wireless communication device according to claim 1, wherein, The processor and the memory are further configured to: The abrupt wake-up event is performed by the following steps: In response to the DRX mode including the idle DRX mode, a random access channel (RACH) message is sent to the cell that is wirelessly communicating with the wireless communication device to switch to the radio resource control (RRC) connection mode; or In response to the DRX mode including the connected DRX mode, a scheduling request is sent to the cell.

11. A method for performing wireless communication at a user equipment (UE), the method comprising: In discontinuous reception DRX mode, it enters a sleep state during the sleep period; The system switches to an active state to execute a rough wake-up event during the sleep period, wherein the rough wake-up event is sending a random access channel RACH message in idle mode DRX I-DRX or sending a scheduling request SR in connected mode DRX C-DRX. The time difference between the last tracking loop update and the warm-up timing associated with the abrupt wake-up event is identified; In response to the time difference being greater than a threshold, at least one tracking loop update is performed during the warm-up period before the abrupt wake-up event is executed; and In response to the time difference being less than or equal to the threshold, the abrupt wake-up event is executed without performing the at least one tracking loop update.

12. The method according to claim 11, wherein, Performing the at least one tracking loop update also includes: Perform at least one of the following: a time-tracking loop TTL update or a frequency-tracking loop FTL update.

13. The method according to claim 11, wherein, Performing the at least one tracking loop update also includes: At least one reference signal is received from the cell with which the UE is wirelessly communicating, wherein the at least one reference signal includes a Synchronization Signal Block (SSB) or a Channel State Information Reference Signal (CSI-RS); and The at least one tracking loop update is performed using the at least one reference signal.

14. The method of claim 11, further comprising: The threshold value is selected from a plurality of threshold values ​​based on at least one reference signal received from the cell communicating with the UE during the last tracking loop update.

15. The method according to claim 14, wherein, Selecting the threshold value includes: The cell quality mode of the cell is determined based on the at least one reference signal; and The threshold value of the threshold is selected based on the cell quality model.

16. The method according to claim 15, wherein, The community quality mode includes excellent community mode, normal community mode, or panic community mode.

17. The method according to claim 15, wherein, Determining the cell quality mode also includes: Obtain the signal-to-noise ratio (SNR) measurement of the at least one reference signal; and The cell quality pattern is determined based on the SNR measurement.

18. The method according to claim 11, wherein, Performing the abrupt wake-up event without performing the at least one tracking loop update includes: The abrupt wake-up event is executed using the last tracking loop update.

19. The method according to claim 11, wherein, The threshold is a factory setting on the UE.

20. The method according to claim 11, wherein, The abrupt wake-up events include: In response to the DRX mode including the idle DRX mode, a Random Access Channel (RACH) message is sent to the cell communicating with the UE to switch to Radio Resource Control (RRC) connection mode; or In response to the DRX mode including the connected DRX mode, a scheduling request is sent to the cell.

21. A wireless communication device in a wireless communication network, comprising: A component used to enter a sleep state during a sleep period in discontinuous reception DRX mode; The component is used to switch to an active state to execute a rough wake-up event during the sleep period, wherein the rough wake-up event is sending a random access channel RACH message in idle mode DRX I-DRX or sending a scheduling request SR in connected mode DRX C-DRX. A component used to identify the time difference between the last tracking loop update and the warm-up timing associated with the abrupt wake-up event; Components for performing at least one tracking loop update during the warm-up period before executing the abrupt wake-up event in response to a time difference greater than a threshold; and A component for performing the abrupt wake-up event without performing the at least one tracking loop update in response to the time difference being less than or equal to the threshold.

22. The wireless communication device according to claim 21, wherein, The component for performing the at least one tracking loop update further includes: A component used to perform at least one of a time-tracking loop (TTL) update or a frequency-tracking loop (FTL) update.

23. The wireless communication device according to claim 21, wherein, The component for performing the at least one tracking loop update further includes: A component for receiving at least one reference signal from a cell communicating wirelessly with the wireless communication device, wherein the at least one reference signal includes a synchronization signal block (SSB) or a channel state information reference signal (CSI-RS); and A component for performing the at least one tracking loop update using the at least one reference signal.

24. The wireless communication device according to claim 21, further comprising: A component for selecting a threshold value from a plurality of threshold values ​​based on at least one reference signal received from a cell communicating wirelessly with the wireless communication device during the last tracking loop update.

25. The wireless communication device according to claim 24, wherein, The component used to select the threshold value includes: Components for determining the cell quality mode of the cell based on the at least one reference signal; and A component for selecting the threshold value of the threshold based on the cell quality mode.

26. The wireless communication device according to claim 25, wherein, The community quality mode includes excellent community mode, normal community mode, or panic community mode.

27. The wireless communication device according to claim 25, wherein, The component used to determine the cell quality mode further includes: Components for obtaining a signal-to-noise ratio (SNR) measurement of the at least one reference signal; and A component used to determine the cell quality pattern based on the SNR measurement.

28. The wireless communication device according to claim 21, wherein, The components used to perform the abrupt wake-up event without performing the at least one tracking loop update include: A component used to execute the abrupt wake-up event using the last tracking loop update.

29. The wireless communication device according to claim 21, wherein, The threshold is a factory setting on the wireless communication device.

30. The wireless communication device according to claim 21, further comprising: Components for performing the abrupt wake-up event by: In response to the DRX mode including the idle DRX mode, a random access channel (RACH) message is sent to the cell that is wirelessly communicating with the wireless communication device to switch to the radio resource control (RRC) connection mode; or In response to the DRX mode including the connected DRX mode, a scheduling request is sent to the cell.

31. A computer-readable medium having program code recorded thereon, wherein, The program code may be executed by one or more processors to cause the one or more processors to perform the method according to any one of claims 11-20.

32. A computer program product comprising computer-readable instructions, which, when executed by a processor, cause the processor to perform the method according to any one of claims 11-20.

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