Uplink communications in user equipment (UE) initiated beam management
UE-initiated beam management with a time window mechanism addresses inefficient uplink transmissions in 5G NR, improving spectrum efficiency and reducing power consumption by limiting redundant reports.
Patent Information
- Application Number
- PCT/CN2024/082593
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-09-25
AI Technical Summary
Existing wireless communication systems, particularly in 5G NR, face challenges with beam management at higher frequencies where radio waves do not travel far and are susceptible to interference, leading to inefficient and redundant uplink transmissions.
Implementing UE-initiated beam management where the user equipment actively monitors channel conditions and reports events to the base station, with a time window mechanism to limit redundant uplink transmissions.
This approach reduces power consumption at the UE and improves spectrum efficiency by minimizing unnecessary uplink transmissions, enhancing communication reliability and reducing interference.
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Figure CN2024082593_25092025_PF_FP_ABST
Abstract
Description
UPLINK COMMUNICATIONS IN USER EQUIPMENT (UE) INITIATED BEAM MANAGEMENTBACKGROUNDTechnical Field
[0001] The present disclosure generally relates to communication systems, and more particularly, to managing uplink communications in a network with a user equipment (UE) configured for UE-initiated beam management.
[0002] Introduction
[0003] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single-carrier frequency division multiple access (SC-FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.
[0004] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate on a municipal, national, regional, and even global level. An example telecommunication standard is 5G New Radio (NR) . 5G NR is part of a continuous mobile broadband evolution promulgated by Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., with Internet of Things (IoT) ) , and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB) , massive machine type communications (mMTC) , and ultra-reliable low latency communications (URLLC) . Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. There exists a need for further improvements in 5G NR technology. These improvements may also be applicable to other multi-access technologies and the telecommunication standards that employ these technologies.SUMMARY
[0005] The following presents a simplified 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 aspects and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.
[0006] Aspects of the disclosure are directed to a method of wireless communication at a user equipment (UE) . In some examples, the method includes receiving a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition. In some examples, the method includes transmitting, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window. In some examples, the method includes receiving a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition. In some examples, the method includes, if the second reference signal is received outside of the time window, transmitting a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition. In some examples, the method includes, if the second reference signal is received within the time window, refraining from transmitting the second indication of the event to the serving cell.
[0007] Aspects of the disclosure are directed to a method of wireless communication at a network entity. In some examples, the method includes transmitting, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management. In some examples, the method includes receiving, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information.
[0008] Aspects of the disclosure are directed to an apparatus configured for wireless communication. In some examples, the apparatus includes means for receiving a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition. In some examples, the apparatus includes means for transmitting, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window. In some examples, the apparatus includes means for receiving a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition. In some examples, the apparatus includes means for transmitting, if the second reference signal is received outside of the time window, a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition. In some examples, the apparatus includes means for refraining, if the second reference signal is received within the time window, from transmitting the second indication of the event to the serving cell.
[0009] Aspects of the disclosure are directed to an apparatus configured for wireless communication. In some examples, the apparatus includes means for transmitting, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management. Aspects of the disclosure are directed to an apparatus configured for wireless communication. In some examples, the apparatus includes means for receiving, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information.
[0010] Aspects of the disclosure relate to a user equipment (UE) configured for wireless communication. In some examples, the UE includes one or more memories, individually or in combination, having instructions, and one or more processors, individually or in combination, configured to execute the instructions. In some examples, the one or more processors are configured to receive a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition. In some examples, the one or more processors are configured to transmit, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window. In some examples, the one or more processors are configured to receive a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition. In some examples, the one or more processors are configured to, if the second reference signal is received outside of the time window, transmit a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition. In some examples, the one or more processors are configured to, if the second reference signal is received within the time window, refrain from transmitting the second indication of the event to the serving cell.
[0011] Aspects of the disclosure are directed to a network entity configured for wireless communication. In some examples, the network entity includes one or more memories, individually or in combination, having instructions, and one or more processors, individually or in combination, configured to execute the instructions. In some examples, the one or more processors are configured to transmit, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management. In some examples, the one or more processors are configured to receive, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information.
[0012] Aspects of the disclosure are directed to a non-transitory, computer-readable medium comprising computer executable code, the code when executed by one or more processors causes the one or more processors to, individually or in combination, perform a method of wireless communication at a user equipment (UE) . In some examples, the method includes receiving a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition. In some examples, the method includes transmitting, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window. In some examples, the method includes receiving a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition. In some examples, the method includes, if the second reference signal is received outside of the time window, transmitting a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition. In some examples, the method includes, if the second reference signal is received within the time window, refraining from transmitting the second indication of the event to the serving cell.
[0013] Aspects of the disclosure are directed to a non-transitory, computer-readable medium comprising computer executable code, the code when executed by one or more processors causes the one or more processors to, individually or in combination, perform a method of wireless communication at a network entity. In some examples, the method includes transmitting, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management. In some examples, the method includes receiving, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information.
[0014] To the accomplishment of the foregoing and related ends, the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the annexed drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed, and this description is intended to include all such aspects and their equivalents.BRIEF DESCRIPTION OF THE DRAWINGS
[0015] FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.
[0016] FIG. 2A is a diagram illustrating an example of a first frame, in accordance with various aspects of the present disclosure.
[0017] FIG. 2B is a diagram illustrating an example of DL channels within a subframe, in accordance with various aspects of the present disclosure.
[0018] FIG. 2C is a diagram illustrating an example of a second frame, in accordance with various aspects of the present disclosure.
[0019] FIG. 2D is a diagram illustrating an example of UL channels within a subframe, in accordance with various aspects of the present disclosure.
[0020] FIG. 3 is a diagram illustrating an example of a base station and user equipment (UE) in an access network.
[0021] FIG. 4 is a block diagram illustrating an example disaggregated base station architecture.
[0022] FIG. 5 is a diagram illustrating an example network that includes a serving cell, a UE, and a candidate cell.
[0023] FIG. 6 is a chart illustrating an example implementation of a prohibit timer for UE-initiated beam management uplink communications.
[0024] FIG. 7 is a chart illustrating another example implementation of a prohibit timer for UE-initiated beam management uplink communications.
[0025] FIG. 8 is a block diagram and chart illustrating an example implementation for UE-initiated beam management uplink communications indicating the start and end of a detected event.
[0026] FIG. 9 is a call-flow diagram illustrating example communications between a user equipment and a network entity or base station.
[0027] FIGs. 10A and 10B illustrate a flowchart of a method of wireless communication.
[0028] FIG. 11 is a diagram illustrating an example of a hardware implementation for an apparatus.
[0029] FIG. 12 is a flowchart illustrating another method of wireless communication.
[0030] FIG. 13 is a diagram illustrating another example of a hardware implementation for another example apparatus.DETAILED DESCRIPTION
[0031] The detailed description set forth below in connection with the appended drawings is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some instances, well known structures and components are shown in block diagram form in order to avoid obscuring such concepts.
[0032] In certain aspects, a user equipment (UE) may be configured to support UE-initiated beam management. For example, the UE may be configured to initiate a start and / or stop of a beam management procedure based on channel condition measurements made by the UE or other UE-side events. As used herein, “UE-initiated beam management” or “event-driven beam management” relates to a process in which the UE actively participates in managing radio beams that are used to communicate data between the UE and a wireless node. In traditional wireless networks, a base station typically handles beam management. For example, the base station controls the direction and focus of the radio beams to ensure a stable and efficient connection with each device in its coverage area. However, some networks, particularly those using higher frequencies (millimeter waves) , the radio waves may not travel as far and may be more susceptible to interference. To overcome these challenges, beamforming may be used to focus a high-power signal towards a specific device instead of transmitting the signal in a wider direction.
[0033] UE-initiated or event-driven beam management is an extension of this concept. The UE may monitor the quality of the radio link and report back to the base station, and / or makes its own adjustments to the beam direction or selection based on specific events or triggers. For instance, if the UE detects that a signal quality of a particular beam is deteriorating, it can send a beam measurement report to the base station, prompting the base station to adjust the beam. Alternatively, the UE may switch to a better beam (if one is available) without waiting for instructions from the base station.
[0034] In certain aspects, the base station may configure the UE to notify it if certain events occur. For example, if the UE measures the reference signal received power (RSRP) of a base station transmission, and the measured RSRP satisfies a threshold condition (e.g., the measured RSRP value is within a range of values) , then the UE may notify the base station of the event. However, the UE may be scheduled (e.g., by dynamic uplink grant and / or configured uplink grant) with multiple uplink transmission occasions. Thus, if the UE detects an event that remains for a period of time that spans multiple uplink transmission occasions, then the UE may transmit redundant uplink transmissions on each uplink occasion notifying the base station of the event.
[0035] Thus, aspects of the disclosure are directed to limiting such uplink transmissions by the UE so that a single event isn't reported multiple times unnecessarily. Limiting uplink transmissions will save power at the UE and improve spectrum efficiency by reducing the amount of redundant uplink transmissions.
[0036] Several aspects of telecommunication systems will now be presented with reference to various apparatus and methods. These apparatus and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as “elements” ) . These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0037] By way of example, an element, or any portion of an element, or any combination of elements may be implemented as a “processing system” that includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs) , central processing units (CPUs) , application processors, digital signal processors (DSPs) , reduced instruction set computing (RISC) processors, systems on a chip (SoC) , baseband processors, 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. One or more processors in the processing system may execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, 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.
[0038] Accordingly, in one or more example embodiments, the functions described may be implemented in hardware, software, or any combination thereof. If implemented in software, the functions may be stored on or encoded as one or more instructions or code on a computer-readable medium. Computer-readable media includes computer storage media. Storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise a random-access memory (RAM) , a read-only memory (ROM) , an electrically erasable programmable ROM (EEPROM) , optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer.
[0039] FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100. The wireless communications system (also referred to as a wireless wide area network (WWAN) ) includes base stations 102, user equipment (s) (UE) 104, an Evolved Packet Core (EPC) 160, and another core network 190 (e.g., a 5G Core (5GC) ) . The base stations 102 may include macrocells (high power cellular base station) and / or small cells (low power cellular base station) . The macrocells include base stations. The small cells include femtocells, picocells, and microcells.
[0040] The base stations 102 configured for 4G Long Term Evolution (LTE) (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN) ) may interface with the EPC 160 through first backhaul links 132 (e.g., S1 interface) . The base stations 102 configured for 5G New Radio (NR) (collectively referred to as Next Generation RAN (NG-RAN) ) may interface with core network 190 through second backhaul links 184. In addition to other functions, the base stations 102 may perform one or more of the following functions: transfer of user data, radio channel ciphering and deciphering, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity) , inter-cell interference coordination, connection setup and release, load balancing, distribution for non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, Multimedia Broadcast Multicast Service (MBMS) , subscriber and equipment trace, RAN information management (RIM) , paging, positioning, and delivery of warning messages. The base stations 102 may communicate directly or indirectly (e.g., through the EPC 160 or core network 190) with each other over third backhaul links 134 (e.g., X2 interface) . The first backhaul links 132, the second backhaul links 184, and the third backhaul links 134 may be wired or wireless.
[0041] The base stations 102 may wirelessly communicate with the UEs 104. Each of the base stations 102 may provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, the small cell 102'may have a coverage area 110'that overlaps the coverage area 110 of one or more macro base stations 102. A network that includes both small cell and macrocells may be known as a heterogeneous network. A heterogeneous network may also include Home Evolved Node Bs (eNBs) (HeNBs) , which may provide service to a restricted group known as a closed subscriber group (CSG) . The communication links 120 between the base stations 102 and the UEs 104 may include uplink (UL) (also referred to as reverse link) transmissions from a UE 104 to a base station 102 and / or downlink (DL) (also referred to as forward link) transmissions from a base station 102 to a UE 104. The communication links 120 may use multiple-input and multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication links may be through one or more carriers. The base stations 102 / UEs 104 may use spectrum up to Y megahertz (MHz) (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) bandwidth per carrier allocated in a carrier aggregation of up to a total of Yx MHz (x component carriers) used for transmission in each direction. The carriers may or may not be adjacent to each other. Allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL than for UL) . The component carriers may include a primary component carrier and one or more secondary component carriers. A primary component carrier may be referred to as a primary cell (PCell) and a secondary component carrier may be referred to as a secondary cell (SCell) .
[0042] Certain UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. The D2D communication link 158 may use the DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH) , a physical sidelink discovery channel (PSDCH) , a physical sidelink shared channel (PSSCH) , and a physical sidelink control channel (PSCCH) . D2D communication may be through a variety of wireless D2D communications systems, such as for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.
[0043] The wireless communications system may further include a Wi-Fi access point (AP) 150 in communication with Wi-Fi stations (STAs) 152 via communication links 154, e.g., in a 5 gigahertz (GHz) unlicensed frequency spectrum or the like. When communicating in an unlicensed frequency spectrum, the STAs 152 / AP 150 may perform a clear channel assessment (CCA) prior to communicating in order to determine whether the channel is available.
[0044] The small cell 102'may operate in a licensed and / or an unlicensed frequency spectrum. When operating in an unlicensed frequency spectrum, the small cell 102'may employ NR and use the same unlicensed frequency spectrum (e.g., 5 GHz, or the like) as used by the Wi-Fi AP 150. The small cell 102', employing NR in an unlicensed frequency spectrum, may boost coverage to and / or increase capacity of the access network.
[0045] The electromagnetic spectrum is often subdivided, based on frequency / wavelength, into various classes, bands, channels, etc. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz –7.125 GHz) and FR2 (24.25 GHz –52.6 GHz) . The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in various documents and articles. A similar nomenclature issue sometimes occurs with regard to FR2, which is often referred to (interchangeably) as a “millimeter wave” band in documents and articles, despite being different from the extremely high frequency (EHF) band (30 GHz –300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.
[0046] With the above aspects in mind, unless specifically stated otherwise, it should be understood that the term “sub-6 GHz” or the like if used herein may broadly represent frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like if used herein may broadly represent frequencies that may include mid-band frequencies, may be within FR2, or may be within the EHF band.
[0047] A base station 102, whether a small cell 102'or a large cell (e.g., macro base station) , may include and / or be referred to as an eNB, gNodeB (gNB) , or another type of base station. Some base stations, such as gNB 180 may operate in a traditional sub 6 GHz spectrum, in millimeter wave frequencies, and / or near millimeter wave frequencies in communication with the UE 104. When the gNB 180 operates in millimeter wave or near millimeter wave frequencies, the gNB 180 may be referred to as a millimeter wave base station. The millimeter wave base station 180 may utilize beamforming 182 with the UE 104 to compensate for the path loss and short range. The base station 180 and the UE 104 may each include a plurality of antennas, such as antenna elements, antenna panels, and / or antenna arrays to facilitate the beamforming.
[0048] The base station 180 may transmit a beamformed signal to the UE 104 in one or more transmit directions 182'. The UE 104 may receive the beamformed signal from the base station 180 in one or more receive directions 182” . The UE 104 may also transmit a beamformed signal to the base station 180 in one or more transmit directions. The base station 180 may receive the beamformed signal from the UE 104 in one or more receive directions. The base station 180 / UE 104 may perform beam training to determine the best receive and transmit directions for each of the base station 180 / UE 104. The transmit and receive directions for the base station 180 may or may not be the same. The transmit and receive directions for the UE 104 may or may not be the same.
[0049] The EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, an MBMS Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. The MME 162 may be in communication with a Home Subscriber Server (HSS) 174. The MME 162 is the control node that processes the signaling between the UEs 104 and the EPC 160. Generally, the MME 162 provides bearer and connection management. All user Internet protocol (IP) packets are transferred through the Serving Gateway 166, which itself is connected to the PDN Gateway 172. The PDN Gateway 172 provides UE IP address allocation as well as other functions. The PDN Gateway 172 and the BM-SC 170 are connected to the IP Services 176. The IP Services 176 may include the Internet, an intranet, an IP Multimedia Subsystem (IMS) , a PS Streaming Service, and / or other IP services. The BM-SC 170 may provide functions for MBMS user service provisioning and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS transmission, may be used to authorize and initiate MBMS Bearer Services within a public land mobile network (PLMN) , and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS traffic to the base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a particular service, and may be responsible for session management (start / stop) and for collecting eMBMS related charging information.
[0050] The core network 190 may include an Access and Mobility Management Function (AMF) 192, other AMFs 193, a Session Management Function (SMF) 194, and a User Plane Function (UPF) 195. The AMF 192 may be in communication with a Unified Data Management (UDM) 196. The AMF 192 is the control node that processes the signaling between the UEs 104 and the core network 190. Generally, the AMF 192 provides Quality of Service (QoS) flow and session management. All user IP packets are transferred through the UPF 195. The UPF 195 provides UE IP address allocation as well as other functions. The UPF 195 is connected to the IP Services 197. The IP Services 197 may include the Internet, an intranet, an IMS, a Packet Switch (PS) Streaming Service, and / or other IP services.
[0051] The base station may include and / or be referred to as a gNB, Node B, eNB, an access point, a base transceiver station, a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS) , an extended service set (ESS) , a transmit reception point (TRP) , or some other suitable terminology. The base station 102 provides an access point to the EPC 160 or core network 190 for a UE 104. Examples of UEs 104 include a cellular phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal digital assistant (PDA) , a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., MP3 player) , a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similar functioning device. Some of the UEs 104 may be referred to as IoT devices (e.g., parking meter, gas pump, toaster, vehicles, heart monitor, etc. ) . The UE 104 may also be referred to as a station, a mobile station, 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, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology. A wireless node may comprise a UE, a base station, or a network entity.
[0052] Referring again to FIG. 1, the UE 104 may include a reporting component 198. As described in more detail elsewhere herein, the reporting component 198 may be configured to receive a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition; transmit, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window; receive a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition; if the second reference signal is received outside of the time window, transmit a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition, and if the second reference signal is received within the time window, refrain from transmitting the second indication of the event to the serving cell. Additionally, or alternatively, the reporting component 198 may perform one or more other operations described herein.
[0053] The base station 102 / 180 may include a reporting component 199. As described in more detail elsewhere herein, the reporting component 199 may be configured to transmit, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management; and receive, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information. Additionally, or alternatively, the reporting component 199 may perform one or more other operations described herein.
[0054] FIG. 2A is a diagram 200 illustrating an example of a first subframe within a 5G NR frame structure. FIG. 2B is a diagram 230 illustrating an example of DL channels within a 5G NR subframe. FIG. 2C is a diagram 250 illustrating an example of a second subframe within a 5G NR frame structure. FIG. 2D is a diagram 280 illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplexed (FDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for either DL or UL, or may be time division duplexed (TDD) in which for a particular set of subcarriers (carrier system bandwidth) , subframes within the set of subcarriers are dedicated for both DL and UL. In the examples provided by FIGs. 2A, 2C, the 5G NR frame structure is assumed to be TDD, with subframe 4 being configured with slot format 28 (with mostly DL) , where D is DL, U is UL, and F is flexible for use between DL / UL, and subframe 3 being configured with slot format 34 (with mostly UL) . While subframes 3, 4 are shown with slot formats 34, 28, respectively, any particular subframe may be configured with any of the various available slot formats 0-61. Slot formats 0, 1 are all DL, UL, respectively. Other slot formats 2-61 include a mix of DL, UL, and flexible symbols. UEs are configured with the slot format (dynamically through DL control information (DCI) , or semi-statically / statically through radio resource control (RRC) signaling) through a received slot format indicator (SFI) . Note that the description infra applies also to a 5G NR frame structure that is TDD.
[0055] Other wireless communication technologies may have a different frame structure and / or different channels. A frame, e.g., of 10 milliseconds (ms) , may be divided into 10 equally sized subframes (1 ms) . Each subframe may include one or more time slots. Subframes may also include mini-slots, which may include 7, 4, or 2 symbols. Each slot may include 7 or 14 symbols, depending on the slot configuration. For slot configuration 0, each slot may include 14 symbols, and for slot configuration 1, each slot may include 7 symbols. The symbols on DL may be cyclic prefix (CP) orthogonal frequency-division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also referred to as single carrier frequency-division multiple access (SC-FDMA) symbols) (for power limited scenarios; limited to a single stream transmission) . The number of slots within a subframe is based on the slot configuration and the numerology. For slot configuration 0, different numerologies μ 0 to 4 allow for 1, 2, 4, 8, and 16 slots, respectively, per subframe. For slot configuration 1, different numerologies 0 to 2 allow for 2, 4, and 8 slots, respectively, per subframe. Accordingly, for slot configuration 0 and numerology μ, there are 14 symbols / slot and 2μ slots / subframe. The subcarrier spacing and symbol length / duration are a function of the numerology. The subcarrier spacing may be equal to 2μ*15 kilohertz (kHz) , where μ is the numerology 0 to 4. As such, the numerology μ=0 has a subcarrier spacing of 15 kHz and the numerology μ=4 has a subcarrier spacing of 240 kHz. The symbol length / duration is inversely related to the subcarrier spacing. FIGs. 2A-2D provide an example of slot configuration 0 with 14 symbols per slot and numerology μ=2 with 4 slots per subframe. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a set of frames, there may be one or more different bandwidth parts (BWPs) (see FIG. 2B) that are frequency division multiplexed. Each BWP may have a particular numerology.
[0056] A resource grid may be used to represent the frame structure. Each time slot includes a resource block (RB) (also referred to as physical RBs (PRBs) ) that extends 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs) . The number of bits carried by each RE depends on the modulation scheme.
[0057] As illustrated in FIG. 2A, some of the REs carry reference (pilot) signals (RS) for the UE.The RS may include demodulation RS (DM-RS) (indicated as Rx for one particular configuration, where 100x is the port number, but other DM-RS configurations are possible) and channel state information reference signals (CSI-RS) for channel estimation at the UE. The RS may also include beam measurement RS (BRS) , beam refinement RS (BRRS) , and phase tracking RS (PT-RS) .
[0058] FIG. 2B illustrates an example of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) , each CCE including nine RE groups (REGs) , each REG including four consecutive REs in an OFDM symbol. A PDCCH within one BWP may be referred to as a control resource set (CORESET) . Additional BWPs may be located at greater and / or lower frequencies across the channel bandwidth. A primary synchronization signal (PSS) may be within symbol 2 of particular subframes of a frame. The PSS is used by a UE 104 to determine subframe / symbol timing and a physical layer identity. A secondary synchronization signal (SSS) may be within symbol 4 of particular subframes of a frame. The SSS is used by a UE to determine a physical layer cell identity group number and radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine a physical cell identifier (PCI) . Based on the PCI, the UE can determine the locations of the aforementioned DM-RS. The physical broadcast channel (PBCH) , which carries a master information block (MIB) , may be logically grouped with the PSS and SSS to form a synchronization signal (SS) / PBCH block (also referred to as SS block (SSB) ) . The MIB provides a number of RBs in the system bandwidth and a system frame number (SFN) . The physical downlink shared channel (PDSCH) carries user data, broadcast system information not transmitted through the PBCH such as system information blocks (SIBs) , and paging messages.
[0059] As illustrated in FIG. 2C, some of the REs carry DM-RS (indicated as R for one particular configuration, but other DM-RS configurations are possible) for channel estimation at the base station. The UE may transmit DM-RS for the physical uplink control channel (PUCCH) and DM-RS for the physical uplink shared channel (PUSCH) . The PUSCH DM-RS may be transmitted in the first one or two symbols of the PUSCH. The PUCCH DM-RS may be transmitted in different configurations depending on whether short or long PUCCHs are transmitted and depending on the particular PUCCH format used. The UE may transmit sounding reference signals (SRS) . The SRS may be transmitted in the last symbol of a subframe. The SRS may have a comb structure, and a UE may transmit SRS on one of the combs. The SRS may be used by a base station for channel quality estimation to enable frequency-dependent scheduling on the UL.
[0060] FIG. 2D illustrates an example of various UL channels within a subframe of a frame. The PUCCH may be located as indicated in one configuration. The PUCCH carries uplink control information (UCI) , such as scheduling requests, a channel quality indicator (CQI) , a precoding matrix indicator (PMI) , a rank indicator (RI) , and hybrid automatic repeat request (HARQ) acknowledgement (ACK) / non-acknowledgement (NACK) feedback. The PUSCH carries data, and may additionally be used to carry a buffer status report (BSR) , a power headroom report (PHR) , and / or UCI.
[0061] FIG. 3 is a block diagram of a base station 102 / 180 in communication with a UE 104 in an access network. In the DL, IP packets from the EPC 160 may be provided to one or more controller / processors 375. The controller / processor 375 implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control (RRC) layer, and layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functionality associated with broadcasting of system information (e.g., MIB, SIBs) , RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release) , inter radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functionality associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification) , and handover support functions; RLC layer functionality associated with the transfer of upper layer packet data units (PDUs) , error correction through ARQ, concatenation, segmentation, and reassembly of RLC service data units (SDUs) , re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto transport blocks (TBs) , demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
[0062] The transmit (TX) processor 316 and the receive (RX) processor 370 implement layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical (PHY) layer, may include error detection on the transport channels, forward error correction (FEC) coding / decoding of the transport channels, interleaving, rate matching, mapping onto physical channels, modulation / demodulation of physical channels, and MIMO antenna processing. The TX processor 316 handles mapping to signal constellations based on various modulation schemes (e.g., binary phase-shift keying (BPSK) , quadrature phase-shift keying (QPSK) , M-phase-shift keying (M-PSK) , M-quadrature amplitude modulation (M-QAM) ) . The coded and modulated symbols may then be split into parallel streams. Each stream may then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., pilot) in the time and / or frequency domain, and then combined together using an Inverse Fast Fourier Transform (IFFT) to produce a physical channel carrying a time domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine the coding and modulation scheme, as well as for spatial processing. The channel estimate may be derived from a reference signal and / or channel condition feedback transmitted by the UE 104. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate an RF carrier with a respective spatial stream for transmission.
[0063] At the UE 104, each receiver 354RX receives a signal through its respective antenna 352. Each receiver 354RX recovers information modulated onto an RF carrier and provides the information to the receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functionality associated with various signal processing functions. The RX processor 356 may perform spatial processing on the information to recover any spatial streams destined for the UE 104. If multiple spatial streams are destined for the UE 104, they may be combined by the RX processor 356 into a single OFDM symbol stream. The RX processor 356 then converts the OFDM symbol stream from the time-domain to the frequency domain using a Fast Fourier Transform (FFT) . The frequency domain signal comprises a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier, and the reference signal, are recovered and demodulated by determining the most likely signal constellation points transmitted by the base station 102 / 180. These soft decisions may be based on channel estimates computed by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals that were originally transmitted by the base station 102 / 180 on the physical channel. The data and control signals are then provided to the controller / processor 359, which implements layer 3 and layer 2 functionality.
[0064] The controller / processor 359 can be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium and may be any of the types of computer-readable mediums discussed herein (e.g., RAM, ROM, EEPROM, optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer) . In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0065] Similar to the functionality described in connection with the DL transmission by the base station 102 / 180, the controller / processor 359 provides RRC layer functionality associated with system information (e.g., MIB, SIBs) acquisition, RRC connections, and measurement reporting; PDCP layer functionality associated with header compression / decompression, and security (ciphering, deciphering, integrity protection, integrity verification) ; RLC layer functionality associated with the transfer of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, re-segmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs onto TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.
[0066] Channel estimates derived by a channel estimator 358 from a reference signal or feedback transmitted by the base station 102 / 180 may be used by the TX processor 368 to select the appropriate coding and modulation schemes, and to facilitate spatial processing. The spatial streams generated by the TX processor 368 may be provided to different antenna 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a respective spatial stream for transmission.
[0067] The UL transmission is processed at the base station 102 / 180 in a manner similar to that described in connection with the receiver function at the UE 104. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to a RX processor 370.
[0068] The controller / processor 375 can be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium and may be any of the types of computer-readable mediums discussed herein (e.g., RAM, ROM, EEPROM, optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the aforementioned types of computer-readable media, or any other medium that can be used to store computer executable code in the form of instructions or data structures that can be accessed by a computer) . In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, deciphering, header decompression, control signal processing to recover IP packets from the UE 104. IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0069] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform aspects in connection with 198 of FIG. 1.
[0070] At least one of the TX processor 316, the RX processor 370, and the controller / processor 375 may be configured to perform aspects in connection with 199 of FIG. 1.
[0071] FIG. 4 is a block diagram illustrating an example disaggregated base station 400 architecture. The disaggregated base station 400 architecture may include one or more CUs 410 that can communicate directly with a core network 420 via a backhaul link, or indirectly with the core network 420 through one or more disaggregated base station units (such as a near real-time (RT) RIC 425 via an E2 link, or a non-RT RIC 415 associated with a service management and orchestration (SMO) Framework 405, or both) . A CU 410 may communicate with one or more DUs 430 via respective midhaul links, such as an F1 interface. The DUs 430 may communicate with one or more RUs 440 via respective fronthaul links. The RUs 440 may communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, the UE 104 may be simultaneously served by multiple RUs 440. As used herein, a network entity may correspond to a base station or to a disaggregated aspect (e.g., CU / DU / RU, etc. ) of the base station.
[0072] Each of the units, i.e., the CUs 410, the DUs 430, the RUs 440, as well as the near-RT RICs 425, the non-RT RICs 415 and the SMO framework 405, may include one or more interfaces or be coupled to one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. Each of the units, or an associated processor or controller providing instructions to the communication interfaces of the units, can be configured to communicate with one or more of the other units via the transmission medium. For example, the units can include a wired interface configured to receive or transmit signals over a wired transmission medium to one or more of the other units. Additionally, the units can include a wireless interface, which may include a receiver, a transmitter or transceiver (such as a radio frequency (RF) transceiver) , configured to receive or transmit signals, or both, over a wireless transmission medium to one or more of the other units.
[0073] In some aspects, the CU 410 may host higher layer control functions. Such control functions can include radio resource control (RRC) , packet data convergence protocol (PDCP) , service data adaptation protocol (SDAP) , or the like. Each control function can be implemented with an interface configured to communicate signals with other control functions hosted by the CU 410. The CU 410 may be configured to handle user plane functionality (i.e., central unit –user plane (CU-UP) ) , control plane functionality (i.e., central unit –control plane (CU-CP) ) , or a combination thereof. In some implementations, the CU 410 can be logically split into one or more CU-UP units and one or more CU-CP units. The CU-UP unit can communicate bidirectionally with the CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration. The CU 410 can be implemented to communicate with the DU 430, as necessary, for network control and signaling.
[0074] The DU 430 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 440. In some aspects, the DU 430 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, or the like) depending, at least in part, on a functional split, such as those defined by the 3rd Generation Partnership Project (3GPP) . In some aspects, the DU 430 may further host one or more low PHY layers. Each layer (or module) can be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU 430, or with the control functions hosted by the CU 410.
[0075] Lower-layer functionality can be implemented by one or more RUs 440. In some deployments, an RU 440, controlled by a DU 430, may correspond to a logical node that hosts RF processing functions, or low-PHY layer functions (such as performing fast Fourier transform (FFT) , inverse FFT (iFFT) , digital beamforming, physical random access channel (PRACH) extraction and filtering, or the like) , or both, based at least in part on the functional split, such as a lower layer functional split. In such an architecture, the RU (s) 440 can be implemented to handle over the air (OTA) communication with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control and user plane communication with the RU (s) 440 can be controlled by the corresponding DU 430. In some scenarios, this configuration can enable the DU (s) 430 and the CU 410 to be implemented in a cloud-based RAN architecture, such as a virtual RAN (vRAN) architecture.
[0076] The SMO Framework 405 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO framework 405 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operations and maintenance interface (such as an O1 interface) . For virtualized network elements, the SMO framework 405 may be configured to interact with a cloud computing platform (such as an open cloud (O-cloud) 490) to perform network element life cycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface) . Such virtualized network elements can include, but are not limited to, CUs 410, DUs 430, RUs 440 and near-RT RICs 425. In some implementations, the SMO framework 405 can communicate with a hardware aspect of a 4G RAN, such as an open eNB (O-eNB) 411, via an O1 interface. Additionally, in some implementations, the SMO Framework 405 can communicate directly with one or more RUs 440 via an O1 interface. The SMO framework 405 also may include the non-RT RIC 415 configured to support functionality of the SMO Framework 405.
[0077] The non-RT RIC 415 may be configured to include a logical function that enables non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updates, or policy-based guidance of applications / features in the near-RT RIC 425. The non-RT RIC 415 may be coupled to or communicate with (such as via an A1 interface) the near-RT RIC 425. The near-RT RIC 425 may be configured to include a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions over an interface (such as via an E2 interface) connecting one or more CUs 410, one or more DUs 430, or both, as well as an O-eNB, with the near-RT RIC 425.
[0078] In some implementations, to generate AI / ML models to be deployed in the near-RT RIC 425, the non-RT RIC 415 may receive parameters or external enrichment information from external servers. Such information may be utilized by the near-RT RIC 425 and may be received at the SMO Framework 405 or the non-RT RIC 415 from non-network data sources or from network functions. In some examples, the non-RT RIC 415 or the near-RT RIC 425 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 415 may monitor long-term trends and patterns for performance and employ AI / ML models to perform corrective actions through the SMO Framework 405 (such as reconfiguration via O1) or via creation of RAN management policies (such as A1 policies) .
[0079] FIG. 5 is a diagram illustrating an example network 500 that includes a serving cell 102a (e.g., base station 102 of FIG. 1) , a UE 104 (e.g., UE 104 of FIG. 1) , and a candidate cell 102b (e.g., base station 102 of FIG. 1) . The serving cell 102a may provide communication coverage for a first geographic coverage area 512, and the candidate cell 102b may provide coverage for a second geographic coverage area 514. As illustrated, the UE 104 may be served by the serving cell 102a and may be located near a geographic region where the serving cell 102a coverage and candidate cell 102b coverage overlap. Thus, in this example, the UE 104 may monitor signaling transmitted via: (i) one or more beams of a first set of beams 508 used by the serving cell 102a, and (ii) one or more beams of a second set of beams 510 used by the candidate cell 102b.
[0080] The UE 104 may be configured for UE-initiated beam management (including event-driven beam management) . As such, the UE 104 may detect an event associated with signaling received from the serving cell 102a and / or the candidate cell 102b, and transmit an indication of the event to the serving cell 102a. In one example, the UE 104 may measure signaling received from the cells and determine whether the measured values satisfy a threshold condition indicative of current beam and / or signal quality. Such measurements may include reference signal received power (RSRP) , signal-to-noise ratio (SINR) , reference signal received quality (RSRQ) , received signal strength indicator (RSSI) , etc. performed by the UE 104 on layer 1 (L1) (e.g., SSB, periodic or semi-persistent CSI-RS, or any suitable reference signal) and / or layer 3 (L3) reference signals received from the serving cell and / or a candidate serving cell.
[0081] If the UE 104 detects an event associated with a measured downlink signal, the UE 104 may transmit uplink signaling to the serving cell 102a notifying the serving cell 102a of the event. The uplink signaling may be transmitted via uplink opportunities scheduled via dynamic scheduling or configured scheduling. In some examples, the UE 104 may also transmit uplink signaling to the serving cell 102a notifying the serving cell 102a of an end of the event previously reported.
[0082] According to the features described below, the UE 104 may limit its number of uplink transmissions for indicating an event, thereby reducing redundant uplink transmissions that are configured to notify the serving cell 102a of the same event, reducing power consumption at the UE 104, and improving spectral efficiency.
[0083] Examples of a Prohibit Timer for UE-Initiated Beam Management
[0084] FIG. 6 is a chart illustrating an example implementation 600 of a prohibit timer for UE-initiated beam management uplink communications. Here, a horizontal axis corresponds to a time domain.
[0085] The chart shows four uplink occasions including a first uplink occasion used for a first uplink transmission 602, a second uplink occasion 604, a third uplink occasion 606, and a fourth uplink occasion used for a second uplink transmission 608. Prior to the first uplink transmission 602, the UE 104 may receive downlink signaling from the serving cell 102a or the candidate cell 102b via a given beam. The UE 104 may measure the downlink signaling and determine that a measured value of the downlink signaling satisfies a threshold indicative of an event.
[0086] In response to determining that the measured value satisfies the threshold, the UE 104 may transmit an indication of the event via the first uplink transmission 602 to the serving cell 102a. The transmitted indication may be part of a UE-initiated beam management process and may include a beam management request, or a beam report associated with the beam by which the downlink signaling was transmitted. The UE 104 may start a prohibit timer upon sending the first uplink transmission, wherein the prohibit timer has a timer duration 610 that extends across the second uplink occasion 604 and the third uplink occasion 606.
[0087] The serving cell 102a may configure the UE 104 with the duration of the prohibit timer and an indication to start the prohibit timer upon sending a first-in-time indication of a UE-detected event to the serving cell 102a. The UE 104 may be configured to refrain from transmitting additional uplink transmissions associated with the same event indicated by the first uplink transmission 602 for the timer duration 610. Thus, unless the UE 104 detects a different event associated with a different beam, the UE 104 may refrain from transmitting an indication of the same event associated with the first uplink transmission 602 via the second uplink occasion 604 or the third uplink occasion 606.
[0088] In the illustrated example, the prohibit timer ends after the third uplink occasion 606. Thus, if the UE 104 determines that the same event associated with the first uplink transmission 602 is ongoing, then the UE 104 may transmit another indication of the event to the serving cell 102a via the second uplink transmission 608. The UE 104 may then restart the prohibit timer after the uplink transmission. Thus, the UE 104 may (re) start the prohibit timer after each uplink transmission that indicates a detected event and refrain from transmitting an uplink report of the same event during a time window associated with the prohibit timer. In certain aspects, the timer duration 610 may be configured by the serving cell 102a or the UE 104 may be preconfigured with the prohibit timer duration.
[0089] Examples of a Time Window for UE-Initiated Beam Management
[0090] FIG. 7 is a chart illustrating an example implementation 700 of a prohibit timer for UE-initiated beam management uplink communications. Here, a horizontal axis corresponds to a time domain.
[0091] When the UE 104 is enabled to transmit uplink transmissions for UE-initiated and / or event-driven beam management requests or beam reports, the serving cell 102a may schedule the UE 104 with uplink transmission occasions. In some examples, the serving cell 102a may assign each uplink occasion to a particular time window used by the UE 104 to receive and measure downlink signals and detect whether a measurement value indicates a particular event.
[0092] As illustrated, a first time window 702 may be used by the UE 104 to receive downlink signaling, perform measurements on the signaling, and determine whether the measurements satisfy a threshold condition for an event. The UE 104 may then use a first uplink transmission occasion 704 to transmit an uplink report notifying the serving cell 102a of events detected in the first time window 702. In some examples, the UE 104 may limited to using the first uplink transmission occasion 704 to only reporting events detected within the first time window 702. A second time window 706 may have a corresponding second uplink transmission occasion 708 for which the UE 104 may transmit an uplink report indicating an event detected from the signaling received during the second time window 706.
[0093] In some examples, the UE 104 may be configured with a limit for the number of reports that it can transmit in a single uplink transmission occasion. For example, the UE 104 may be limited to one report per uplink transmission occasion. In some examples, the UE 104 may be configured to measure downlink signals associated with a single beam at each time window. Thus, in some examples, each successive time window may be used by the UE 104 to measure downlink signaling received via a different beam.
[0094] Examples of Event End Reporting for UE-Initiated Beam Management
[0095] FIG. 8 is a block diagram and chart illustrating an example implementation 800 for UE-initiated beam management uplink communications indicating the start and end of a detected event. Here, a horizontal axis corresponds to a time domain, and a vertical axis corresponds to values associated with a downlink signal measurement metric (e.g., RSRP, RSRQ, SINR, RSSI, etc. ) . For example, the vertical axis may be expressed in decibels (dB) .
[0096] When the UE 104 is enabled for uplink transmissions for UE-initiated and / or event-driven beam management request or beam report, the UE 104 may transmit an uplink transmission to the serving cell 102a upon entering an event (wherein the uplink transmission is configured to indicate entering the event) , and transmit another uplink transmission upon leaving the event (wherein the uplink transmission is configured to indicate leaving the event) .
[0097] For example, the UE 104 may continuously receive and measure signals transmitted by the serving cell and / or candidate cell (s) . The UE 104 may “enter” or an event or the event may start for the UE 104 when a measurement value of at least one of the measured signals satisfies a threshold condition. For example, an event starts if the UE 104 is measuring an RSRP of the received signals, and a measured RSRP value of a downlink signal transmitted / received via a first beam is greater than or equal to a threshold RSRP value. The UE 104 may continue to receive and measure downlink signals via the first beam and the event may continue for the UE 104 for as long as the measured RSRP values of signals received via the first beam satisfy the threshold condition. The UE 104 may “leave” the event, or the event may end for the UE 104 if the signals received via the first beam no longer satisfy the threshold condition.
[0098] However, while an event exists for the UE 104 for a given beam, the measured values of signals received via that beam may fluctuate. In some examples, such fluctuations may start and end an event for the UE 104 at a rapid rate. In other words, a first measurement may start an event for the UE 104, while the next measurement ends the event for the UE 104, and a next measurement starts the event over again. Accordingly, in some examples, the serving cell may configure the UE 104 with two threshold values: one for determining the start of an event, and another for determining the ending of the event. For instance, an event-entering threshold may be a relatively high value, whereas an event-leaving threshold may be a value lower / smaller than the event-entering threshold. By raising the required measurement value for entering an event and lowering the required measurement value for leaving the event, the rate at which the UE 104 enters and leaves the event within a given series of measurements may be reduced.
[0099] Referring now to FIG. 8, the UE 104 may be configured, via the serving cell 102a, with periodic uplink occasions, including a first uplink occasion by which a first uplink 802 is transmitted, a second uplink occasion 804 whereby no uplink is transmitted, and a third uplink occasion by which a second uplink 806 is transmitted. The serving cell 102a may also configure the UE 104 with an event-entering threshold 810 and an event-ending threshold 812. The threshold values may be associated with any suitable signal-measuring metric (e.g., RSRP, SINR, RSRQ, RSSI, etc. ) used by the UE 104 to measure downlink signals from the serving cell 102a or the candidate cell 102b. A measured value 808 is shown relative to the threshold values, where the measured value 808 reflects a value of the signal-measuring metric used by the UE 104 on downlink signaling received via a given beam.
[0100] The UE 104 may receive and measure a first downlink signal via the beam. As an example, the UE 104 may perform an RSRP measurement on the first signal and determine that a first resulting RSRP value 814 is greater than the event-entering threshold 810. As such, the UE 104 may determine that an event has started and may transmit the first uplink 802 reporting the event to the serving cell 102a.
[0101] Subsequently, the UE 104 may receive and perform an RSRP measurement on a second downlink signal received via the same beam and determine that a second resulting RSRP value 816 is greater than the event-entering threshold 810. However, because the UE 104 has already reported the event to the serving cell 102a via the first uplink 802, the UE 104 may refrain from transmitting another uplink reporting the same event via the second uplink occasion 804. By refraining from transmitting a redundant report to the serving cell 102a, the UE 104 reduces its power consumption and improves spectrum efficiency.
[0102] After that, the UE 104 may receive and perform an RSRP measurement on a third downlink signal received via the same beam and determine that a third resulting RSRP value 818 is less than the event-ending threshold 812 (e.g., the threshold condition for the event to continue is not satisfied) . Accordingly, the UE 104 may determine that the event associated with the beam has ended. In response, the UE 104 may report the end of the event to the serving cell 102a via the second uplink 806 transmission.
[0103] FIG. 9 is a call-flow diagram illustrating example communications 900 between a user equipment 104 and a network entity or base station 102. In this example, the base station may function as a serving cell (e.g., serving cell 102a of FIG. 5) . It should be noted that the reference signals illustrated here (e.g., CSI-RS and SSB) in three separate communications are made via one or more of the same base station transmit beam and the same UE receive beam. Moreover, although the reference signals are shown as transmitted by the serving cell, the UE 104 may also receive reference signals in the same manner from a candidate cell. In such an example, if the UE 104 detects an event associated with a candidate cell transmission, the UE 104 may report the event to the serving cell.
[0104] At a first communication 902, the base station 102 may configure the UE 104 for UE-initiated beam management (including event-driven beam management) . In some examples, the configuration may include scheduling (e.g., dynamic or configured scheduling) for uplink transmissions. The configuration may also include timer information configured to provide the UE 104 with a prohibit timer as discussed in connection with FIG. 6. The configuration may also include information configured to provide the UE 104 with an association between a time window for measuring downlink signals and an uplink opportunity for transmitting a report for events detected in the time window, as discussed in connection with FIG. 7. The configuration may also include multiple threshold values that provide the UE 104 with a basis for detecting an event, as described in connection with FIG. 8.
[0105] At a second communication 904, the base station 102 may transmit a reference signal via a first beam, and the UE 104 may receive the reference signal via a second beam. At a first process 906, the UE 104 may measure the received reference signal and determine whether the measurement is indicative of an event. If no event is detected, then the UE 104 may refrain from transmitting uplink signaling to the base station 102 in response to the second communication 904. If an event is detected, then the UE 104 may transmit uplink signaling configured to notify the base station 102 of the event, as shown in a third communication 908. The uplink signaling may include information configured to identify one or more of the transmit / receive beam, the reference signal received, a value of the measurement indicative of the event, a type of event (e.g., start or end, single beam or multi-beam) , and / or any other suitable information.
[0106] At an optional second process 910, the UE 104 may start a prohibit timer upon transmission of the event report if the UE 104 is configured for the operations illustrated in FIG. 6.
[0107] At a fourth communication 912, the base station 102 may transmit reference signals and the UE 104 may receive the reference signals. At a third process 914, the UE 104 may measure the received signals and determine whether the previously detected event is ongoing or if the previously detected event has ended. In the illustrated example, the UE 104 determines that the previously detected event is ongoing.
[0108] At a fourth process 916, the UE 104 may refrain from transmitting an uplink report to the base station 102 indicating that the event is ongoing. In some examples, the UE 104 refrains from transmitting the uplink report because the prohibit timer has not ended (e.g., the prohibit timer has not run its full duration) as described in reference to FIG. 6. In another example, the UE 104 refrains from transmitting the uplink report because the UE 104 has already transmitted a report for this event and is configured to refrain from transmitting multiple reports for the same event, as described in reference to FIGs. 7 and 8.
[0109] At a fifth communication 918, the base station 102 may transmit reference signals and the UE 104 may receive the reference signals. At a fifth process 920, the UE 104 may measure the received signals and determine whether the event previously detected at both the first process 906 and the third process 914 is ongoing or if it has ended. In the illustrated example, the UE 104 determines that the previously detected event has ended. At an optional sixth communication 922, the UE 104 may transmit an uplink report to the base station indicating that the event has ended, as described in connection with FIG. 8.
[0110] FIGs. 10A and 10B are flowcharts illustrating a method 1000 of wireless communication. The method may be performed by a UE (e.g., the UE 104; the apparatus 1102) . Specifically, the method may be performed by one or more processors and memories (e.g., controller / processor 359 and memory 360 of FIG. 3) .
[0111] At 1002, the UE may optionally receive, from the serving cell, UE-initiated beam management configuration information comprising time window configuration information defining a duration of the time window. For example, 1002 may be performed by a receiving component 1140. Here, the serving cell may configure the UE with parameters configured to prevent the UE from transmitting unnecessary uplink transmissions reporting beam management events. In some examples, beam management events may include events where a UE-initiated beam measurement results in a value that satisfies a threshold condition. Satisfaction of the threshold condition may cause the UE to report the event to the serving cell. In such examples, the report may trigger the serving cell to adjust or refine the parameters (e.g., direction, width, power, etc. ) associated with its beams, switch from a current beam to a new beam, perform load balancing and assign the UE to another one or more less congested beams, adjust resource allocation for the UE on a particular beam, initiate a beam recovery process, and any other suitable actions that a serving cell or base station may take in response to a UE-initiated beam measurement report.
[0112] At 1004, the UE may receive a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition. For example, 1004 may be performed by the receiving component 1140. Here, the UE may receive a reference signal and, as part of a UE-initiated beam measurement process, the UE may measure the reference signal.
[0113] At 1006, the UE may optionally measure the first reference signal to determine whether the first quality value satisfies the threshold condition, wherein the first reference signal is associated with a first beam. For example, 1006 may be performed by a measuring component 1142. Here, the UE may measure the reference signal and compare the measured value with a threshold value or range or values.
[0114] At 1008, the UE may transmit, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window. For example, 1008 may be performed by a transmitting component 1144. Here, if the measured value satisfies the threshold condition, then the UE may determine that an event occurred or is occurring, and in response the UE may transmit a report indicating one or more of the event or the measured value to the serving cell.
[0115] At 1010, the UE may optionally start a timer in response to transmission of the first indication of the event, wherein the start of the timer is a start of the time window, and wherein an end of the timer is an end of the time window. For example, 1010 may be performed by a timer component 1146. Here, the UE may start a timer or even designate the duration of a time window in response to the uplink transmission indicating the event. The UE may then refrain from transmitting uplink communications reporting the same event during the timer or time window. This reduces the amount of uplink transmission made by the UE and prevents the UE from transmitting redundant uplink communications if the event is persistent and continuous for at least the duration of the timer or time window.
[0116] At 1012, the UE may receive a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition. For example, 1012 may be performed by the receiving component 1140. Here, the UE may receive and measure another reference signal from the same network entity from which the first reference signal was received. The second reference signal may also be transmitted via the same beam used by the network entity to transmit the first reference signal.
[0117] At 1014, the UE may optionally measure the second reference signal to determine whether the second quality value satisfies the threshold condition, wherein the second reference signal is associated with the first beam, and wherein the measurements associated with the first reference signal and the second reference signal are performed as part of the UE-initiated beam management. For example, 1014 may be performed by the measuring component 1142. Here, the UE may measure the second reference signal to determine if the event associated with the first beam (as determined by the threshold satisfying measurement of the first reference signal) is ongoing.
[0118] At 1016, the UE may optionally, if the second reference signal is received outside of the time window, transmit a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition. For example, 1016 may be performed by the transmitting component 1144. As discussed, the time window may be based on a timer or another duration of time within which the UE refrains from transmitting a report of the same event previously reported to the serving cell. However, if the duration of time has expired, then the UE may transmit a report associated with an event even if the same event was previously reported.
[0119] At 1018, the UE may optionally, if the second reference signal is received within the time window, refrain from transmitting the second indication of the event to the serving cell. For example, 1018 may be performed by a refraining component 1148. Here, the UE may refrain from transmitting a report associated with an event that the UE previously reported if a (pre-) configured duration of time has not expired. This time window may function to prevent the UE from transmitting a relatively high number of reports regarding the same event within the time window. Thus, the UE may still report the same event multiple times if the event is ongoing, but the reports may be less frequent than if the UE did not refrain from reporting during time window (s) .
[0120] At 1020, the UE may optionally receive, from the serving cell, UE-initiated beam management configuration information comprising at least one of: an indication of one or more uplink transmission occasions for transmitting an indication of an event detected within a corresponding time window; or an indication of a one-to-one association between each of the one or more uplink transmission occasions with the corresponding time window. For example, 1020 may be performed by the receiving component 1140. Here, the serving cell may configure the UE with resources to report one report per time window for events detected within the time window, for example, as illustrated in FIG. 7.
[0121] At 1022, the UE may optionally receive, from the serving cell, UE-initiated beam management configuration information comprising an indication of the first threshold condition and a second threshold condition, wherein satisfaction of the first threshold condition indicates a beginning of the event and a start of the time window, and wherein satisfaction of the second threshold condition indicates an end of the event and an end of the time window. For example, 1022 may be performed by the receiving component 1140. Here, the configuration information may provide the UE with parameters described in connection with aspects of FIG. 8.
[0122] At 1024, the UE may optionally receive a third reference signal from the serving cell or the candidate cell from which the first reference signal and the second reference signal was received, wherein the second reference signal is received within the time window, wherein the time window begins with the transmission of the first indication and ends with a transmission of a third indication of the end of the event based on the third reference signal satisfying the second threshold condition. For example, 1024 may be performed by the receiving component 1140. Here, the serving cell may configure the UE with at least two different hysteresis parameters indicating when an event begins and when the event ends, as discussed in connection with FIG. 8.
[0123] At 1026, the UE may optionally transmit the third indication to the serving cell. For example, 1026 may be performed by the transmitting component 1144. Here, the UE may report (e.g., via the third indication) an end of an event. In this example, the UE may report the start of the event, refrain from reporting the same event if it is ongoing, then report that the event has ended.
[0124] In certain aspects, each of the first indication and the second indication comprises an event-driven beam management request associated with the first beam, or a beam report associated with the first beam.
[0125] In certain aspects, the time window configuration information defines the duration of the time window in units of time or a number of contiguous slots.
[0126] In certain aspects, the time window configuration information defines the duration of the time window as a number of contiguous uplink transmission occasions scheduled via the UE-initiated beam management configuration information.
[0127] In certain aspects, the first reference signal, the second reference signal, and the third reference signal are contiguous downlink transmissions.
[0128] FIG. 11 is a diagram 1100 illustrating an example of a hardware implementation for an apparatus 1102. The apparatus 1102 is a UE and includes a cellular baseband processor 1104 (also referred to as a modem) coupled to a cellular RF transceiver 1122 and one or more subscriber identity modules (SIM) cards 1120, an application processor 1106 coupled to a secure digital (SD) card 1108 and a screen 1110, a Bluetooth module 1112, a wireless local area network (WLAN) module 1114, a Global Positioning System (GPS) module 1116, and a power supply 1118. The cellular baseband processor 1104 communicates through the cellular RF transceiver 1122 with the UE 104 and / or BS 102 / 180. The cellular baseband processor 1104 may include a computer-readable medium / memory. The computer-readable medium / memory may be non-transitory. The cellular baseband processor 1104 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the cellular baseband processor 1104, causes the cellular baseband processor 1104 to perform the various functions described supra. The computer-readable medium / memory may also be used for storing data that is manipulated by the cellular baseband processor 1104 when executing software. The cellular baseband processor 1104 further includes a reception component 1130, a communication manager 1132, and a transmission component 1134. The communication manager 1132 includes the one or more illustrated components. The components within the communication manager 1132 may be stored in the computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1104. The cellular baseband processor 1104 may be a component of the UE 104 and may include the memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. In one configuration, the apparatus 1102 may be a modem chip and include just the baseband processor 1104, and in another configuration, the apparatus 1102 may be the entire UE (e.g., see UE 104 of FIG. 3) and include the aforediscussed additional modules of the apparatus 1102. In various examples, the apparatus 1102 can be a chip, SoC, chipset, package or device that may include: one or more modems (such as a Wi-Fi (IEEE 802.11) modem or a cellular modem such as 3GPP 4G LTE or 5G compliant modem) ; one or more processors, processing blocks or processing elements (collectively “the processor” ) ; one or more radios (collectively “the radio” ) ; and one or more memories or memory blocks (collectively “the memory” ) .
[0129] The communication manager 1132 includes a receiving component 1140 that is configured to receive, from the serving cell, UE-initiated beam management configuration information comprising time window configuration information defining a duration of the time window; receive a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition; receive a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition; receive, from the serving cell, UE-initiated beam management configuration information comprising at least one of: an indication of one or more uplink transmission occasions for transmitting an indication of an event detected within a corresponding time window; or an indication of a one-to-one association between each of the one or more uplink transmission occasions with the corresponding time window; receive, from the serving cell, UE-initiated beam management configuration information comprising an indication of the first threshold condition and a second threshold condition, wherein satisfaction of the first threshold condition indicates a beginning of the event and a start of the time window, and wherein satisfaction of the second threshold condition indicates an end of the event and an end of the time window; and receive a third reference signal from the serving cell or the candidate cell from which the first reference signal and the second reference signal was received, wherein the second reference signal is received within the time window, wherein the time window begins with the transmission of the first indication and ends with a transmission of a third indication of the end of the event based on the third reference signal satisfying the second threshold condition; e.g., as described in connection with 1002, 1004, 1012, 1020, 1022, and 1024 of FIGs. 10A and 10B.
[0130] The communication manager 1132 further includes a measuring component 1142 configured to measure the first reference signal to determine whether the first quality value satisfies the threshold condition, wherein the first reference signal is associated with a first beam; and measure the second reference signal to determine whether the second quality value satisfies the threshold condition, wherein the second reference signal is associated with the first beam, and wherein the measurements associated with the first reference signal and the second reference signal are performed as part of the UE-initiated beam management; e.g., as described in connection with 1006 and 1014 of FIGs. 10A and 10B.
[0131] The communication manager 1132 further includes a transmitting component 1144 configured to transmit, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window; if the second reference signal is received outside of the time window, transmit a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition; and transmit the third indication to the serving cell; e.g., as described in connection with 1008 and 1026 of FIGs. 10A and 10B.
[0132] The communication manager 1132 further includes a timer component 1146 configured to start a timer in response to transmission of the first indication of the event, wherein the start of the timer is a start of the time window, and wherein an end of the timer is an end of the time window, e.g., as described in connection with 1010 of FIG. 10A.
[0133] The communication manager 1132 further includes a refraining component 1148 configured to if the second reference signal is received within the time window, refrain from transmitting the second indication of the event to the serving cell, e.g., as described in connection with 1018 of FIG. 10A.
[0134] The apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowcharts of FIGs. 10A and 10B. As such, each block in the aforementioned flowcharts may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by a processor configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.
[0135] In one configuration, the apparatus 1102, and in particular the cellular baseband processor 1104, includes: means for receiving, from the serving cell, UE-initiated beam management configuration information comprising time window configuration information defining a duration of the time window; means for receiving a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition; means for measuring the first reference signal to determine whether the first quality value satisfies the threshold condition, wherein the first reference signal is associated with a first beam; means for transmitting, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window; means for starting a timer in response to transmission of the first indication of the event, wherein the start of the timer is a start of the time window, and wherein an end of the timer is an end of the time window; means for receiving a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition; means for measuring the second reference signal to determine whether the second quality value satisfies the threshold condition, wherein the second reference signal is associated with the first beam, and wherein the measurements associated with the first reference signal and the second reference signal are performed as part of the UE-initiated beam management; means for transmitting, if the second reference signal is received outside of the time window, a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition; means for refraining, if the second reference signal is received within the time window, from transmitting the second indication of the event to the serving cell; means for receiving, from the serving cell, UE-initiated beam management configuration information comprising at least one of: an indication of one or more uplink transmission occasions for transmitting an indication of an event detected within a corresponding time window; or an indication of a one-to-one association between each of the one or more uplink transmission occasions with the corresponding time window; means for receiving, from the serving cell, UE-initiated beam management configuration information comprising an indication of the first threshold condition and a second threshold condition, wherein satisfaction of the first threshold condition indicates a beginning of the event and a start of the time window, and wherein satisfaction of the second threshold condition indicates an end of the event and an end of the time window; means for receiving a third reference signal from the serving cell or the candidate cell from which the first reference signal and the second reference signal was received, wherein the second reference signal is received within the time window, wherein the time window begins with the transmission of the first indication and ends with a transmission of a third indication of the end of the event based on the third reference signal satisfying the second threshold condition; and means for transmitting the third indication to the serving cell.
[0136] The aforementioned means may be one or more of the aforementioned components of the apparatus 1102 configured to perform the functions recited by the aforementioned means. As described supra, the apparatus 1102 may include the TX Processor 368, the RX Processor 356, and the controller / processor 359. As such, in one configuration, the aforementioned means may be the TX Processor 368, the RX Processor 356, and the controller / processor 359 configured to perform the functions recited by the aforementioned means.
[0137] FIG. 12 is a flowchart illustrating a method 1200 of wireless communication. The method may be performed by a network entity (e.g., the base station 102 / 180; the apparatus 1302) . Specifically, the method may be performed by one or more processors and memories (e.g., controller / processor 375 and memory 376 of FIG. 3) .
[0138] At 1202, the network entity may optionally transmit, to the UE, scheduling for a plurality of uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, wherein each of the plurality of uplink occasions is associated with a separate instance of the time window, and wherein the UE-initiated beam management information is further configured to cause the UE to transmit uplink transmissions via a given uplink occasion to report events detected by the UE within the time window corresponding to the given uplink occasion. For example, 1206 may be performed by a transmitting component 1340. Here, the network entity may configure the UE to only report events detected in corresponding time windows using corresponding uplink transmission occasions. In other words, the network entity may configure the UE to measure signals received within particular time windows (e.g., contiguous, non-overlapping time windows) and transmit event reports only for each time window in uplink resources corresponding to a given time window, as discussed above in reference to FIG. 7.
[0139] At 1204, the network entity may optionally transmit, to the UE, scheduling for uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, and wherein the UE-initiated beam management information is further configured to define the duration of the time window in terms of a contiguous number of the uplink occasions. For example, 1204 may be performed by the transmitting component 1340. Here, the network entity may configure the UE with a prohibit timer having a duration that is defined in terms of a number of configured occasions for transmitting an indication of an event (e.g., a beam management request or a beam report) .
[0140] At 1206, the network entity may transmit, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management. For example, 1206 may be performed by the transmitting component 1340. Here, the network entity configures the UE with a time duration (e.g., a timer or a time window) within which the UE refrains from transmitting an indication of an event that it has already reported to the network entity. Accordingly, the amount of uplink transmissions and redundant reporting from the UE may be reduced.
[0141] At 1208, the network entity may receive, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information. For example, 1208 may be performed by a receiving component 1342. Here, the network entity receives a report of an event detected by the UE. However, the network entity will not expect to receive additional reports of the same event within the time duration if the event is persistent or continues for the configured time duration.
[0142] In certain aspects, the UE-initiated beam management information is configured to cause the UE to start the time window upon transmitting the first uplink transmission reporting the first event and refrain from transmitting an additional uplink transmission reporting the first event within the duration of the time window.
[0143] In certain aspects, the UE-initiated beam management information is further configured to define the duration of the time window in terms of air-interface time-domain units or International System of Units (SI) units of time.
[0144] In certain aspects, the UE-initiated beam management information is further configured to cause the UE to refrain from transmitting uplink transmissions via the given uplink occasion to report events detected by the UE outside of the time window corresponding to the given uplink occasion.
[0145] In certain aspects, the duration of the time window is defined by a first measurement value and a second measurement value.
[0146] In certain aspects, the UE-initiated beam management information is further configured to cause the UE to: report a start of an event via a first uplink transmission if downlink signaling measured by the UE is greater than or equal to the first measurement value, and report an end of the event via a second uplink transmission if downlink signaling measured by the UE is less than or equal to the second measurement value.
[0147] FIG. 13 is a diagram 1300 illustrating an example of a hardware implementation for an apparatus 1302. The apparatus 1302 is a BS and includes a baseband unit 1304. The baseband unit 1304 may communicate through a cellular RF transceiver with the UE 104. The baseband unit 1304 may include a computer-readable medium / memory. The baseband unit 1304 is responsible for general processing, including the execution of software stored on the computer-readable medium / memory. The software, when executed by the baseband unit 1304, causes the baseband unit 1304 to perform the various functions described supra. The computer-readable medium / memory may also be used for storing data that is manipulated by the baseband unit 1304 when executing software. The baseband unit 1304 further includes a reception component 1330, a communication manager 1332, and a transmission component 1334. The communication manager 1332 includes the one or more illustrated components. The components within the communication manager 1332 may be stored in the computer-readable medium / memory and / or configured as hardware within the baseband unit 1304. The baseband unit 1304 may be a component of the BS 102 / 180 and may include the memory 376 and / or at least one of the TX processor 316, the RX processor 370, and the controller / processor 375. In various examples, the apparatus 1302 can be a chip, SoC, chipset, package or device that may include: one or more modems (such as a Wi-Fi (IEEE 802.11) modem or a cellular modem such as 3GPP 4G LTE or 5G compliant modem) ; one or more processors, processing blocks or processing elements (collectively “the processor” ) ; one or more radios (collectively “the radio” ) ; and one or more memories or memory blocks (collectively “the memory” ) .
[0148] The communication manager 1332 includes a transmitting component 1340 configured to transmit, to the UE, scheduling for a plurality of uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, wherein each of the plurality of uplink occasions is associated with a separate instance of the time window, and wherein the UE-initiated beam management information is further configured to cause the UE to transmit uplink transmissions via a given uplink occasion to report events detected by the UE within the time window corresponding to the given uplink occasion; transmit, to the UE, scheduling for uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, and wherein the UE-initiated beam management information is further configured to define the duration of the time window in terms of a contiguous number of the uplink occasions; and transmit, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management; e.g., as described in connection with 1202, 1204, and 1206 of FIG. 12.
[0149] The communication manager 1332 further includes a receiving component 1342 configured to receive, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information; e.g., as described in connection with 1208 of FIG. 12.
[0150] The apparatus may include additional components that perform each of the blocks of the algorithm in the aforementioned flowchart of FIG. 12. As such, each block in the aforementioned flowchart may be performed by a component and the apparatus may include one or more of those components. The components may be one or more hardware components specifically configured to carry out the stated processes / algorithm, implemented by a processor configured to perform the stated processes / algorithm, stored within a computer-readable medium for implementation by a processor, or some combination thereof.
[0151] In one configuration, the apparatus 1302, and in particular the baseband unit 1304, includes: means for receiving, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information; means for transmitting, to the UE, scheduling for a plurality of uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, wherein each of the plurality of uplink occasions is associated with a separate instance of the time window, and wherein the UE-initiated beam management information is further configured to cause the UE to transmit uplink transmissions via a given uplink occasion to report events detected by the UE within the time window corresponding to the given uplink occasion; means for transmitting, to the UE, scheduling for uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, and wherein the UE-initiated beam management information is further configured to define the duration of the time window in terms of a contiguous number of the uplink occasions; and means for transmitting, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management.
[0152] The aforementioned means may be one or more of the aforementioned components of the apparatus 1302 configured to perform the functions recited by the aforementioned means. As described supra, the apparatus 1302 may include the TX Processor 316, the RX Processor 370, and the controller / processor 375. As such, in one configuration, the aforementioned means may be the TX Processor 316, the RX Processor 370, and the controller / processor 375 configured to perform the functions recited by the aforementioned means.
[0153] Additional Considerations
[0154] As used herein, the terms “detecting” and / or “determining” (or any variants thereof such as “identify” and “detect” ) encompass a wide variety of actions. For example, “identifying” and / or “detecting” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure) , ascertaining and the like.
[0155] As used herein, a processor, at least one processor, and / or one or more processors, individually or in combination, configured to perform or operable for performing a plurality of actions is meant to include at least two different processors able to perform different, overlapping or non-overlapping subsets of the plurality actions, or a single processor able to perform all of the plurality of actions. In one non-limiting example of multiple processors being able to perform different ones of the plurality of actions in combination, a description of a processor, at least one processor, and / or one or more processors configured or operable to perform actions X, Y, and Z may include at least a first processor configured or operable to perform a first subset of X, Y, and Z (e.g., to perform X) and at least a second processor configured or operable to perform a second subset of X, Y, and Z (e.g., to perform Y and Z) . Alternatively, a first processor, a second processor, and a third processor may be respectively configured or operable to perform a respective one of actions X, Y, and Z. It should be understood that any combination of one or more processors each may be configured or operable to perform any one or any combination of a plurality of actions.
[0156] As used herein, a memory, at least one memory, and / or one or more memories, individually or in combination, configured to store or having stored thereon instructions executable by one or more processors for performing a plurality of actions is meant to include at least two different memories able to store different, overlapping or non-overlapping subsets of the instructions for performing different, overlapping or non-overlapping subsets of the plurality actions, or a single memory able to store the instructions for performing all of the plurality of actions. In one non-limiting example of one or more memories, individually or in combination, being able to store different subsets of the instructions for performing different ones of the plurality of actions, a description of a memory, at least one memory, and / or one or more memories configured or operable to store or having stored thereon instructions for performing actions X, Y, and Z may include at least a first memory configured or operable to store or having stored thereon a first subset of instructions for performing a first subset of X, Y, and Z (e.g., instructions to perform X) and at least a second memory configured or operable to store or having stored thereon a second subset of instructions for performing a second subset of X, Y, and Z (e.g., instructions to perform Y and Z) . Alternatively, a first memory, and second memory, and a third memory may be respectively configured to store or have stored thereon a respective one of a first subset of instructions for performing X, a second subset of instruction for performing Y, and a third subset of instructions for performing Z. It should be understood that any combination of one or more memories each may be configured or operable to store or have stored thereon any one or any combination of instructions executable by one or more processors to perform any one or any combination of a plurality of actions. Moreover, one or more processors may each be coupled to at least one of the one or more memories and configured or operable to execute the instructions to perform the plurality of actions. For instance, in the above non-limiting example of the different subset of instructions for performing actions X, Y, and Z, a first processor may be coupled to a first memory storing instructions for performing action X, and at least a second processor may be coupled to at least a second memory storing instructions for performing actions Y and Z, and the first processor and the second processor may, in combination, execute the respective subset of instructions to accomplish performing actions X, Y, and Z. Alternatively, three processors may access one of three different memories each storing one of instructions for performing X, Y, or Z, and the three processor may in combination execute the respective subset of instruction to accomplish performing actions X, Y, and Z. Alternatively, a single processor may execute the instructions stored on a single memory, or distributed across multiple memories, to accomplish performing actions X, Y, and Z.
[0157] It is understood that the specific order or hierarchy of blocks in the processes / flowcharts disclosed is an illustration of example approaches. Based upon design preferences, it is understood that the specific order or hierarchy of blocks in the processes / flowcharts may be rearranged. Further, some blocks may be combined or omitted. The accompanying method claims present elements of the various blocks in a sample order, and are not meant to be limited to the specific order or hierarchy presented.
[0158] 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 may 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 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. ” Terms such as “if, ” “when, ” and “while” should be interpreted to mean “under the condition that” rather than imply an immediate temporal relationship or reaction. That is, these phrases, e.g., “when, ” do not imply an immediate action in response to or during the occurrence of an action, but simply imply that if a condition is met then an action will occur, but without requiring a specific or immediate time constraint for the action to occur. The word “exemplary” is used herein to mean “serving as an example, instance, or illustration. ” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects. Unless specifically stated otherwise, the term “some” refers to one or more. Combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” include any combination of A, B, and / or C, and may include multiples of A, multiples of B, or multiples of C. Specifically, combinations such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any such combinations may contain one or more member or members of A, B, or C. 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 those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Moreover, nothing disclosed herein is intended to be dedicated to the public regardless of whether such disclosure is explicitly recited in the claims. The words “module, ” “mechanism, ” “element, ” “device, ” and the like may not be a substitute for the word “means. ” As such, no claim element is to be construed as a means plus function unless the element is expressly recited using the phrase “means for. ”
[0159] Example Aspects
[0160] The following examples are illustrative only and may be combined with aspects of other embodiments or teachings described herein, without limitation.
[0161] Example 1 is a method of wireless communication at a user equipment (UE) , comprising: receiving a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition; transmitting, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window; receiving a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition; if the second reference signal is received outside of the time window, transmitting a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition; and if the second reference signal is received within the time window, refraining from transmitting the second indication of the event to the serving cell.
[0162] Example 2 is the method of Example 1, wherein the UE is configured for UE-initiated beam management, and wherein the method further comprises: measuring the first reference signal to determine whether the first quality value satisfies the threshold condition, wherein the first reference signal is associated with a first beam; and measuring the second reference signal to determine whether the second quality value satisfies the threshold condition, wherein the second reference signal is associated with the first beam, and wherein the measurements associated with the first reference signal and the second reference signal are performed as part of the UE-initiated beam management.
[0163] Example 3 is the method of Example 2, wherein each of the first indication and the second indication comprises an event-driven beam management request associated with the first beam, or a beam report associated with the first beam.
[0164] Example 4 is the method of any of Examples 1-3, wherein the method further comprises: receiving, from the serving cell, UE-initiated beam management configuration information comprising time window configuration information defining a duration of the time window.
[0165] Example 5 is the method of Example 4, wherein the time window configuration information defines the duration of the time window in units of time or a number of contiguous slots.
[0166] Example 6 is the method of Example 4, wherein the time window configuration information defines the duration of the time window as a number of contiguous uplink transmission occasions scheduled via the UE-initiated beam management configuration information.
[0167] Example 7 is the method of any of Examples 1-6, further comprising: starting a timer in response to transmission of the first indication of the event, wherein the start of the timer is a start of the time window, and wherein an end of the timer is an end of the time window.
[0168] Example 8 is the method of any of Examples 1-7, further comprising: receiving, from the serving cell, UE-initiated beam management configuration information comprising at least one of: an indication of one or more uplink transmission occasions for transmitting an indication of an event detected within a corresponding time window; or an indication of a one-to-one association between each of the one or more uplink transmission occasions with the corresponding time window.
[0169] Example 9 is the method of any of Examples 1-8, further comprising: receiving a third reference signal from the serving cell or the candidate cell from which the first reference signal and the second reference signal was received, wherein the second reference signal is received within the time window, wherein the time window begins with the transmission of the first indication and ends with a transmission of a third indication of an end of the event based on the third reference signal not satisfying the threshold condition; and transmitting the third indication to the serving cell.
[0170] Example 10 is the method of Example 9, wherein the first reference signal, the second reference signal, and the third reference signal are contiguous downlink transmissions.
[0171] Example 11 is the method of any of Examples 1-10, wherein the threshold condition is a first threshold condition, and wherein the method further comprises: receiving, from the serving cell, UE-initiated beam management configuration information comprising an indication of the first threshold condition and a second threshold condition, wherein satisfaction of the first threshold condition indicates a beginning of the event and a start of the time window, and wherein satisfaction of the second threshold condition indicates an end of the event and an end of the time window.
[0172] Example 12 is the method of Example 11, further comprising: receiving a third reference signal from the serving cell or the candidate cell from which the first reference signal and the second reference signal was received, wherein the second reference signal is received within the time window, wherein the time window begins with the transmission of the first indication and ends with a transmission of a third indication of the end of the event based on the third reference signal satisfying the second threshold condition; and transmitting the third indication to the serving cell.
[0173] Example 13 is a method of wireless communication at a network entity, comprising: transmitting, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management; and receiving, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information.
[0174] Example 14 is the method of Example 13, wherein the UE-initiated beam management information is configured to cause the UE to start the time window upon transmitting the first uplink transmission reporting the first event and refrain from transmitting an additional uplink transmission reporting the first event within the duration of the time window.
[0175] Example 15 is the method of any of Examples 13 and 14, wherein the UE-initiated beam management information is further configured to define the duration of the time window in terms of air-interface time-domain units or International System of Units (SI) units of time.
[0176] Example 16 is the method of any of Examples 13-15, further comprising: transmitting, to the UE, scheduling for uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, and wherein the UE- initiated beam management information is further configured to define the duration of the time window in terms of a contiguous number of the uplink occasions.
[0177] Example 17 is the method of any of Examples 13-16, further comprising: transmitting, to the UE, scheduling for a plurality of uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, wherein each of the plurality of uplink occasions is associated with a separate instance of the time window, and wherein the UE-initiated beam management information is further configured to cause the UE to transmit uplink transmissions via a given uplink occasion to report events detected by the UE within the time window corresponding to the given uplink occasion.
[0178] Example 18 is the method of Example 17, wherein the UE-initiated beam management information is further configured to cause the UE to refrain from transmitting uplink transmissions via the given uplink occasion to report events detected by the UE outside of the time window corresponding to the given uplink occasion.
[0179] Example 19 is the method of any of Examples 13-18, wherein the duration of the time window is defined by a first measurement value and a second measurement value.
[0180] Example 20 is the method of Example 19, wherein the UE-initiated beam management information is further configured to cause the UE to: report a start of an event via a first uplink transmission if downlink signaling measured by the UE is greater than or equal to the first measurement value, and report an end of the event via a second uplink transmission if downlink signaling measured by the UE is less than or equal to the second measurement value.
[0181] Example 21 is a user equipment (UE) comprising: one or more memories, individually or in combination, having instructions; and one or more processors, individually or in combination, configured to execute the instructions and cause the apparatus to perform the method of any of Examples 1-12.
[0182] Example 22 is a network entity comprising: one or more memories, individually or in combination, having instructions; and one or more processors, individually or in combination, configured to execute the instructions and cause the apparatus to perform the method of any of Examples 13-20.
[0183] Example 23 is a user equipment (UE) comprising: one or more means for performing the method of any of Examples 1-12.
[0184] Example 24 is a network entity comprising: one or more means for performing the method of any of Examples 13-20.
[0185] Example 25 is a non-transitory, computer-readable medium comprising computer executable code, the code when executed by one or more processors causes the one or more processors to, individually or in combination, perform the method of any of Examples 1-12 for wireless communication by a user equipment (UE) .
[0186] Example 26 is a non-transitory, computer-readable medium comprising computer executable code, the code when executed by one or more processors causes the one or more processors to, individually or in combination, perform the method of any of Examples 13-20 for wireless communication by a network entity.
Claims
1.A user equipment (UE) configured for wireless communication, comprising:one or more memories, individually or in combination, having instructions; andone or more processors, individually or in combination, configured to execute the instructions and cause the UE to:receive a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition;transmit, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window;receive a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition;if the second reference signal is received outside of the time window, transmit a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition; andif the second reference signal is received within the time window, refrain from transmitting the second indication of the event to the serving cell.2.The UE of claim 1, wherein the UE is configured for UE-initiated beam management, and wherein the one or more processors, individually or in combination, are further configured to cause the UE to:measure the first reference signal to determine whether the first quality value satisfies the threshold condition, wherein the first reference signal is associated with a first beam; andmeasure the second reference signal to determine whether the second quality value satisfies the threshold condition, wherein the second reference signal is associated with the first beam, and wherein the first reference signal and the second reference signal are measured as part of the UE-initiated beam management.3.The UE of claim 2, wherein each of the first indication and the second indication comprises an event-driven beam management request associated with the first beam, or a beam report associated with the first beam.4.The UE of claim 1, wherein the one or more processors, individually or in combination, are further configured to cause the UE to:receive, from the serving cell, UE-initiated beam management configuration information comprising time window configuration information defining a duration of the time window.5.The UE of claim 4, wherein the time window configuration information defines the duration of the time window in units of time or a number of contiguous slots.6.The UE of claim 4, wherein the time window configuration information defines the duration of the time window as a number of contiguous uplink transmission occasions scheduled via the UE-initiated beam management configuration information.7.The UE of claim 1, wherein the one or more processors, individually or in combination, are further configured to cause the UE to:start a timer in response to transmission of the first indication of the event, wherein the start of the timer is a start of the time window, and wherein an end of the timer is an end of the time window.8.The UE of claim 1, wherein the one or more processors, individually or in combination, are further configured to cause the UE to:receive, from the serving cell, UE-initiated beam management configuration information comprising at least one of:an indication of one or more uplink transmission occasions for transmitting an indication of an event detected within a corresponding time window; oran indication of a one-to-one association between each of the one or more uplink transmission occasions with the corresponding time window.9.The UE of claim 1, wherein the one or more processors, individually or in combination, are further configured to cause the UE to:receive a third reference signal from the serving cell or the candidate cell from which the first reference signal and the second reference signal was received, wherein the second reference signal is received within the time window, wherein the time window begins with transmission of the first indication and ends with a transmission of a third indication of an end of the event based on the third reference signal not satisfying the threshold condition; andtransmit the third indication to the serving cell.10.The UE of claim 9, wherein the first reference signal, the second reference signal, and the third reference signal are contiguous downlink transmissions.11.The UE of claim 1, wherein the threshold condition is a first threshold condition, and wherein the one or more processors, individually or in combination, are further configured to cause the UE to:receive, from the serving cell, UE-initiated beam management configuration information comprising an indication of the first threshold condition and a second threshold condition, wherein satisfaction of the first threshold condition indicates a beginning of the event and a start of the time window, and wherein satisfaction of the second threshold condition indicates an end of the event and an end of the time window.12.The UE of claim 11, wherein the one or more processors, individually or in combination, are further configured to cause the UE to:receive a third reference signal from the serving cell or the candidate cell from which the first reference signal and the second reference signal was received, wherein the second reference signal is received within the time window, wherein the time window begins with transmission of the first indication and ends with a transmission of a third indication of the end of the event based on the third reference signal satisfying the second threshold condition; andtransmit the third indication to the serving cell.13.A network entity configured for wireless communication, comprising:one or more memories, individually or in combination, having instructions; andone or more processors, individually or in combination, configured to execute the instructions and cause the network entity to:transmit, to a user equipment (UE) , UE-initiated beam management information configured to define a duration of a time window configured to limit uplink transmissions within the time window based on events being reported via the uplink transmissions, wherein the uplink transmissions are associated with UE-initiated beam management; andreceive, from the UE, a first uplink transmission reporting a first event according to the UE-initiated beam management information.14.The network entity of claim 13, wherein the UE-initiated beam management information is configured to cause the UE to start the time window upon transmitting the first uplink transmission reporting the first event and refrain from transmitting an additional uplink transmission reporting the first event within the duration of the time window.15.The network entity of claim 13, wherein the UE-initiated beam management information is further configured to define the duration of the time window in terms of air-interface time-domain units or International System of Units (SI) units of time.16.The network entity of claim 13, wherein the one or more processors, individually or in combination, are further configured to cause the network entity to:transmit, to the UE, scheduling for uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, and wherein the UE-initiated beam management information is further configured to define the duration of the time window in terms of a contiguous number of the uplink occasions.17.The network entity of claim 13, wherein the one or more processors, individually or in combination, are further configured to cause the network entity to:transmit, to the UE, scheduling for a plurality of uplink occasions during which the UE may transmit uplink transmissions associated with UE-initiated beam management, wherein each of the plurality of uplink occasions is associated with a separate instance of the time window, and wherein the UE-initiated beam management information is further configured to cause the UE to transmit uplink transmissions via a given uplink occasion to report events detected by the UE within the time window corresponding to the given uplink occasion.18.The network entity of claim 17, wherein the UE-initiated beam management information is further configured to cause the UE to refrain from transmitting uplink transmissions via the given uplink occasion to report events detected by the UE outside of the time window corresponding to the given uplink occasion.19.The network entity of claim 13, wherein the duration of the time window is defined by a first measurement value and a second measurement value.20.A method of wireless communication at a user equipment (UE) , comprising:receiving a first reference signal from a serving cell or a candidate cell, wherein a first quality value associated with the first reference signal satisfies a threshold condition;transmitting, to the serving cell, a first indication of an event based on the first reference signal satisfying the threshold condition, wherein the first indication is transmitted within a time window;receiving a second reference signal from the serving cell or the candidate cell from which the first reference signal was received, wherein a second quality value associated with the second reference signal satisfies the threshold condition;if the second reference signal is received outside of the time window, transmitting a second indication of the event to the serving cell, wherein the second indication of the event is based on the second reference signal satisfying the threshold condition; andif the second reference signal is received within the time window, refraining from transmitting the second indication of the event to the serving cell.
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