Indication of synchronization signal block pattern
By indicating the SSB burst periodicity through a discovery signal, the method reduces latency and energy consumption in wireless communication systems by allowing UEs to efficiently decode synchronization signals.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- QUALCOMM INC
- Filing Date
- 2024-11-25
- Publication Date
- 2026-05-28
AI Technical Summary
In wireless communication systems, the uncertainty of synchronization signal block (SSB) burst periodicity leads to increased latency and energy consumption when user equipment (UE) assumes the maximum periodicity for decoding, which is not always accurate.
A discovery signal is used to indicate the SSB burst periodicity, allowing the UE to monitor the communication channel for a corresponding time period and decode the SSB by combining multiple transmissions, reducing latency and energy consumption.
This approach reduces latency and energy usage by enabling the UE to accurately determine the SSB burst periodicity, thereby optimizing the SSB decoding process.
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Figure CN2024134096_28052026_PF_FP_ABST
Abstract
Description
INDICATION OF SYNCHRONIZATION SIGNAL BLOCK PATTERNFIELD OF THE DISCLOSURE
[0001] Aspects of the present disclosure generally relate to wireless communication and specifically relate to techniques, apparatuses, and methods associated with an indication of a synchronization signal block pattern.BACKGROUND
[0002] Wireless communication systems are widely deployed to provide various services, which may involve carrying or supporting voice, text, other messaging, video, data, and / or other traffic. Typical wireless communication systems may employ multiple-access radio access technologies (RATs) capable of supporting communication among multiple wireless communication devices including user devices or other devices by sharing the available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and / or device transmit power, among other examples) . Such multiple-access RATs are supported by technological advancements that have been adopted in various telecommunication standards, which define common protocols that enable different wireless communication devices to communicate on a local, municipal, national, regional, or global level.
[0003] An example telecommunication standard is New Radio (NR) . NR, which may also be referred to as 5G, is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . NR (and other RATs beyond NR) may be designed to better support enhanced mobile broadband (eMBB) access, Internet of things (IoT) networks or reduced capability device deployments, and ultra-reliable low latency communication (URLLC) applications. To support these verticals, NR systems may be designed to implement a modularized functional infrastructure, a disaggregated and service-based network architecture, network function virtualization, network slicing, multi-access edge computing, millimeter wave (mmWave) technologies including massive multiple-input multiple-output (MIMO) , licensed and unlicensed spectrum access, non-terrestrial network (NTN) deployments, sidelink and other device-to-device direct communication technologies (for example, cellular vehicle-to-everything (CV2X) communication) , multiple-subscriber implementations, high-precision positioning, and / or radio frequency (RF) sensing, among other examples. As the demand for connectivity continues to increase, further improvements in NR may be implemented, and other RATs, such as 6G and beyond, may be introduced to enable new applications and facilitate new use cases.
[0004] In some cases, a network node may utilize a discovery procedure to enable a user equipment to establish a connection with the network node. In some cases, the discovery procedure may include the network node transmitting (e.g., via broadcasting or beam sweeping) a discovery signal. In some cases, the discovery signal may be transmitted via a particular frequency to indicate that the particular frequency is associated with a cell provided by the network node.BRIEF DESCRIPTION OF THE DRAWINGS
[0005] The appended drawings illustrate some aspects of the present disclosure but are not limiting of the scope of the present disclosure because the description may enable other aspects. Each of the drawings is provided for purposes of illustration and description, and not as a definition of the limits of the claims. The same or similar reference numbers in different drawings may identify the same or similar elements.
[0006] Fig. 1 is a diagram illustrating an example of a wireless communication network, in accordance with the present disclosure.
[0007] Fig. 2 is a diagram illustrating an example disaggregated network node architecture, in accordance with the present disclosure.
[0008] Fig. 3 is a diagram illustrating an example of a synchronization signal (SS) hierarchy, in accordance with the present disclosure.
[0009] Fig. 4 is a diagram illustrating examples of SS block (SSB) transmission patterns, in accordance with the present disclosure.
[0010] Figs. 5A-5C are diagrams illustrating an example associated with an indication of an SSB pattern, in accordance with the present disclosure.
[0011] Fig. 6 is a diagram illustrating an example process performed, for example, at a user equipment (UE) or an apparatus of a UE, in accordance with the present disclosure.
[0012] Fig. 7 is a diagram illustrating an example process performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure.
[0013] Fig. 8 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.
[0014] Fig. 9 is a diagram of an example apparatus for wireless communication, in accordance with the present disclosure.SUMMARY
[0015] Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE) . The method may include receiving a discovery signal indicating a synchronization signal block (SSB) burst periodicity of a plurality of SSB burst periodicities. The method may include receiving an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity.
[0016] Some aspects described herein relate to a method of wireless communication performed by a network node. The method may include transmitting a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities. The method may include periodically transmitting an SSB burst in accordance with the SSB burst periodicity.
[0017] Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a UE. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities. The set of instructions, when executed by one or more processors of the UE, may cause the UE to receive an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity.
[0018] Some aspects described herein relate to a non-transitory computer-readable medium that stores a set of instructions for wireless communication by a network node. The set of instructions, when executed by one or more processors of the network node, may cause the network node to transmit a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities. The set of instructions, when executed by one or more processors of the network node, may cause the network node to periodically transmit an SSB burst in accordance with the SSB burst periodicity.
[0019] Some aspects described herein relate to a UE for wireless communication. The UE may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to receive a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities. The one or more processors may be configured to receive an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity.
[0020] Some aspects described herein relate to a network node for wireless communication. The network node may include one or more memories and one or more processors coupled to the one or more memories. The one or more processors may be configured to transmit a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities. The one or more processors may be configured to periodically transmit an SSB burst in accordance with the SSB burst periodicity.
[0021] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities. The apparatus may include means for receiving an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity.
[0022] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for transmitting a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities. The apparatus may include means for periodically transmitting an SSB burst in accordance with the SSB burst periodicity.
[0023] Aspects of the present disclosure may generally be implemented by or as a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, network node, network entity, wireless communication device, and / or processing system as substantially described with reference to, and as illustrated by, this specification and accompanying drawings.
[0024] The foregoing paragraphs of this section have broadly summarized some aspects of the present disclosure. These and additional aspects and associated advantages will be described hereinafter. The disclosed aspects may be used as a basis for modifying or designing other aspects for carrying out the same or similar purposes of the present disclosure. Such equivalent aspects do not depart from the scope of the appended claims. Characteristics of the aspects disclosed herein, both their organization and method of operation, together with associated advantages, will be better understood from the following description when considered in connection with the accompanying drawings.DETAILED DESCRIPTION
[0025] Various aspects of the present disclosure are described hereinafter with reference to the accompanying drawings. However, aspects of the present disclosure may be embodied in many different forms. The present disclosure is not to be construed as limited to any specific aspect illustrated by or described with reference to an accompanying drawing or otherwise presented in this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. One skilled in the art may appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using various combinations or quantities of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover an apparatus having, or a method that is practiced using, other structures and / or functionalities in addition to or other than the structures and / or functionalities with which various aspects of the disclosure set forth herein may be practiced. Any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.
[0026] Several aspects of telecommunication systems will now be presented with reference to various methods, operations, apparatuses, and techniques. These methods, operations, apparatuses, and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, or algorithms (collectively referred to as “elements” ) . These elements may be implemented using hardware, software, or a combination of hardware and software. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.
[0027] In some wireless communication networks, a network node may utilize a discovery procedure to enable a user equipment (UE) to establish a connection with the network node. In some cases, the discovery procedure may include the network node transmitting (e.g., via broadcasting or beam sweeping) a discovery signal, such as, for example, a primary synchronization signal (PSS) . In some cases, the discovery signal may be transmitted via a particular frequency to indicate that the particular frequency is associated with a cell provided by the network node.
[0028] In some cases, a UE may monitor the particular frequency to determine whether the particular frequency is associated with a cell. The UE may detect the discovery signal transmitted by the network node. The UE may determine that the particular frequency is associated with a cell based at least in part on detecting the discovery signal.
[0029] In some cases, a discovery signal (e.g., a PSS) is transmitted in conjunction with a synchronization signal block (SSB) . For example, a network node may periodically transmit an SSB via a downlink beam associated with a cell provided by the network node. In some cases, an SSB may include resources that carry a PSS, a secondary synchronization signal (SSS) , and / or a physical broadcast channel (PBCH) that a UE may use to derive, decode, or otherwise obtain necessary information to access the cell provided by the network node (e.g., a radio frame boundary, a physical cell identity (PCI) , and / or a master information block (MIB) that provides parameters to acquire a system information block (SIB) , among other examples) .
[0030] An SSB burst may include one or more SSBs, and the SSB burst (e.g., the one or more SSBs in the SSB burst) may be transmitted by a network node in accordance with an SSB burst periodicity. In some examples, the SSB burst periodicity may be 20 milliseconds (ms) and the network node may transmit an SSB burst every 20 ms in accordance with the SSB burst periodicity. In some examples, the SSB burst may include multiple SSBs that are transmitted on different beams. In such examples, the periodicity of a particular SSB, in the SSB burst, transmitted on a given beam may be 20 ms (e.g., the SSB burst periodicity) .
[0031] In some cases, to conserve energy, a wireless communication network may utilize an increased SSB burst periodicity (e.g., an SSB burst periodicity greater than 20 ms) . For example, a wireless communication network may utilize an increased SSB burst periodicity (e.g., an SSB burst periodicity of 40 ms, 80 ms, or 160 ms, among other examples) to reduce an SSB transmission overhead.
[0032] In some cases, to prevent a corresponding increase in an amount of time that a UE must monitor a frequency to determine whether the frequency is associated with a cell, a network node may transmit one or more discovery signals between periodic transmissions of the SSB burst. Stated differently, an SSB burst periodicity may be greater than a periodicity at which a transmission of only the discovery signal occurs.
[0033] As an example, a periodicity associated with a transmission of only the discovery signal may be 20 ms and an SSB burst periodicity may be 80 ms. In this example, the network node may perform three transmissions of only the discovery signal in between success periodic transmissions of the SSB burst.
[0034] In some cases, the SSB burst periodicity may not be known by the UE. For example, the network node may autonomously determine to transmit an SSB burst periodicity at a periodicity of 40 ms, 80 ms, or 160 ms, among other examples.
[0035] In some cases, the UE may be in an idle mode and may receive an SSB with combining. For example, the UE may receive multiple transmissions of an SSB in accordance with the SSB burst periodicity, and may utilize the multiple transmissions of the SSB to decode the SSB. In cases where the UE does not know the SSB burst periodicity, the UE may assume a greatest SSB burst periodicity (e.g., a periodicity of 160 ms based on the example described above) , which may increase a latency associated with decoding the SSB with combining (e.g., using two or more of the transmitted SSBs to decode the SSB) .
[0036] As an example, the UE may perform combining utilizing four SSBs. By assuming the greatest SSB burst periodicity (e.g., 160 ms) , the latency associated with using four SSBs to decode the SSB may be 640 ms even in cases where the actual SSB burst periodicity is less than the greatest periodicity assumed by the UE.
[0037] Various aspects relate generally to a discovery signal that indicates when an SSB is to be transmitted. Some aspects more specifically relate to a discovery signal that includes an indication of an SSB burst periodicity. In some aspects, a UE may receive an SSB based at least in part on monitoring a communication channel for a time period corresponding to the SSB burst periodicity. In some aspects, the UE may detect multiple SSBs based at least in part on monitoring the communication channel for the time period. In some aspects, the UE may decode the SSB based at least in part on combining the multiple SSBs detected during the time period.
[0038] In some aspects, the discovery signal may be a PSS that includes information indicating the SSB burst periodicity. In some aspects, the information indicating the SSB burst periodicity may comprise a single bit. In some aspects, the single bit may be set to a first value to indicate a first SSB burst periodicity and may be set to a second value to indicate a second SSB burst periodicity.
[0039] Particular aspects of the subject matter described in this disclosure can be implemented to realize one or more of the following potential advantages. In some examples, the described techniques can be used to reduce a latency associated with receiving an SSB with combining when an SSB burst periodicity is unknown to a UE, relative to the UE assuming that the SSB burst periodicity corresponds to a greatest SSB burst periodicity. By reducing the latency associated with receiving an SSB with combining when an SSB burst periodicity is unknown to a UE, an amount of energy utilized by the UE to receive the SSB may be reduced, relative to an amount of energy utilized by the UE to receive the SSB based on assuming that the SSB burst periodicity corresponds to the greatest SSB burst periodicity.
[0040] As described above, wireless communication systems may be deployed to provide various services, which may involve carrying or supporting voice, text, other messaging, video, data, and / or other traffic. Some wireless communications systems may employ multiple-access radio access technologies (RATs) . The multiple-access RATs may be capable of supporting communication with multiple wireless communication devices by sharing the available system resources (for example, time domain resources, frequency domain resources, spatial domain resources, and / or device transmit power, among other examples) . Examples of such multiple-access RATs 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.
[0041] Multiple-access RATs are supported by technological advancements that have been adopted in various telecommunication standards, which define common protocols that enable wireless communication devices to communicate on a local, municipal, enterprise, national, regional, or global level. For example, 5G New Radio (NR) is part of a continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) . 5G NR may support enhanced mobile broadband (eMBB) access, Internet of Things (IoT) networks or reduced capability (RedCap) device deployments, ultra-reliable low-latency communication (URLLC) applications, and / or massive machine-type communication (mMTC) , among other examples.
[0042] To support these and other target verticals, a wireless communication system may be designed to implement a modularized functional infrastructure, a disaggregated and service-based network architecture, network function virtualization, network slicing, multi-access edge computing, millimeter wave (mmWave) technologies including massive multiple-input multiple-output (MIMO) , beamforming, IoT device or RedCap device connectivity and management, industrial connectivity, licensed and unlicensed spectrum access, sidelink and other device-to-device direct communication (for example, cellular vehicle-to-everything (CV2X) communication) , frequency spectrum expansion, overlapping spectrum use, small cell deployments, non-terrestrial network (NTN) deployments, device aggregation, advanced duplex communication (for example, sub-band full-duplex (SBFD) ) , multiple-subscriber implementations, high-precision positioning, radio frequency (RF) sensing, network energy savings (NES) , low-power signaling and radios, and / or artificial intelligence or machine learning (AI / ML) , among other examples.
[0043] The foregoing and other technological improvements may support use cases, such as wireless fronthauls, wireless midhauls, wireless backhauls, wireless data centers, extended reality (XR) and metaverse applications, meta services for supporting vehicle connectivity, holographic and mixed reality communication, autonomous and collaborative robots, vehicle platooning and cooperative maneuvering, sensing networks, gesture monitoring, human-brain interfacing, digital twin applications, asset management, and universal coverage applications using non-terrestrial and / or aerial platforms, among other examples.
[0044] As the demand for connectivity continues to increase, further improvements in NR may be implemented, and other RATs, such as 6G and beyond, may be introduced to enable new applications and facilitate new use cases. The methods, operations, apparatuses, and techniques described herein may enable one or more of the foregoing technologies or new technologies and / or support one or more of the foregoing use cases or new use cases.
[0045] Fig. 1 is a diagram illustrating an example of a wireless communication network 100, in accordance with the present disclosure. The wireless communication network 100 may be or may include elements of a 5G (or NR) network or a 6G network, among other examples. The wireless communication network 100 may include multiple network nodes 110. For example, in Fig. 1, the wireless communication network 100 includes a network node (NN) 110a and a network node 110b. The network nodes 110 may support communications with multiple UEs 120. For example, in Fig. 1, the network nodes 110 support communication with a UE 120a, a UE 120b, and a UE 120c. In some examples, a UE 120 may also communicate with other UEs 120 and a network node 110 may communicate with a core network and with other network nodes 110.
[0046] The network nodes 110 and the UEs 120 of the wireless communication network 100 may communicate using the electromagnetic spectrum, which may be subdivided by frequency or wavelength into various classes, bands, carriers, and / or channels. For example, devices of the wireless communication network 100 may communicate using one or more operating bands. In some aspects, multiple wireless communication networks 100 may be deployed in a given geographic area. Each wireless communication network 100 may support a particular RAT (which may also be referred to as an air interface) and may operate on one or more carrier frequencies in one or more frequency bands or ranges. In some examples, when multiple RATs are deployed in a given geographic area, each RAT in the geographic area may operate on different frequencies to avoid interference with other RATs. Additionally or alternatively, in some examples, the wireless communication network 100 may implement dynamic spectrum sharing (DSS) , in which multiple RATs are implemented with dynamic bandwidth allocation (for example, based on user demand) in a single frequency band. In some examples, the wireless communication network 100 may support communication over unlicensed spectrum, where access to an unlicensed channel is subject to a channel access mechanism. For example, in a shared or unlicensed frequency band, a transmitting device may perform a channel access procedure, such as a listen-before-talk (LBT) procedure, to contend against other devices for channel access before transmitting on a shared or unlicensed channel.
[0047] Various operating bands have been defined as frequency range designations FR1 (410 MHz through 7.125 GHz) , FR2 (24.25 GHz through 52.6 GHz) , FR3 (7.125 GHz through 24.25 GHz) , FR4a or FR4-1 (52.6 GHz through 71 GHz) , FR4 (52.6 GHz through 114.25 GHz) , and FR5 (114.25 GHz through 300 GHz) . Although a portion of FR1 is greater than 6 GHz, FR1 is often referred to (interchangeably) as a “sub-6 GHz” band in some documents and articles. Similarly, FR2 is often referred to (interchangeably) as a “millimeter wave” band in some documents and articles, despite being different than the extremely high frequency (EHF) band (30 GHz through 300 GHz) , which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band. The frequencies between FR1 and FR2 are often referred to as mid-band frequencies, which include FR3. Frequency bands falling within FR3 may inherit FR1 characteristics or FR2 characteristics, and thus may effectively extend features of FR1 or FR2 into the mid-band frequencies. Thus, “sub-6 GHz, ” if used herein, may broadly refer to frequencies that are less than 6 GHz, that are within FR1, and / or that are included in mid-band frequencies. Similarly, the term “millimeter wave, ” if used herein, may broadly refer to mid-band frequencies or to frequencies that are within FR2, FR4, FR4-a or FR4-1, FR5, and / or the EHF band. Higher frequency bands may extend 5G NR operation, 6G operation, and / or other RATs beyond 52.6 GHz.
[0048] A network node 110 and / or a UE 120 may include one or more devices, components, or systems that enable communication with other devices, components, or systems of the wireless communication network 100. For example, a UE 120 and a network node 110 may each include one or more chips, system-on-chips (SoCs) , chipsets, packages, or devices that individually or collectively constitute or comprise a processing system, such as a processing system 140 of the UE 120 or a processing system 145 of the network node 110. A processing system (for example, the processing system 140 and / or the processing system 145) includes processor (or “processing” ) circuitry in the form of one or multiple processors, microprocessors, processing units (such as central processing units (CPUs) , graphics processing units (GPUs) , neural processing units (NPUs) (also referred to as neural network processors or deep learning processors (DLPs) ) , and / or digital signal processors (DSPs) ) , processing blocks, application-specific integrated circuits (ASICs) , programmable logic devices (PLDs) , or other discrete gate or transistor logic or circuitry (any one or more of which may be generally referred to herein individually as a “processor” or collectively as “the processor” or “the processor circuitry” ) . Such processors may be individually or collectively configurable or configured to perform various functions or operations described herein. A group of processors collectively configurable or configured to perform a set of functions may include a first processor configurable or configured to perform a first function of the set and a second processor configurable or configured to perform a second function of the set. In some other examples, each of a group of processors may be configurable or configured to perform a same set of functions.
[0049] The processing system 140 and the processing system 145 may each include memory circuitry in the form of one or multiple memory devices, memory blocks, memory elements, or other discrete gate or transistor logic or circuitry, each of which may include or implement tangible storage media such as random-access memory (RAM) or read-only memory (ROM) , or combinations thereof (any one or more of which may be generally referred to herein individually as a “memory” or collectively as “the memory” or “the memory circuitry” ) . One or more of the memories may be coupled (for example, operatively coupled, communicatively coupled, electronically coupled, or electrically coupled) with one or more of the processors and may individually or collectively store processor-executable code or instructions (such as software) that, when executed by one or more of the processors, may configure one or more of the processors to perform various functions or operations described herein. Additionally or alternatively, in some examples, one or more of the processors may be configured to perform various functions or operations described herein without requiring configuration by software. “Software” shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, or functions, among other examples, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
[0050] The processing system 140 and the processing system 145 may each include or be coupled with one or more modems (such as a cellular (for example, a 5G or 6G compliant) modem) . In some examples, one or more processors of the processing system 140 and / or the processing system 145 include or implement one or more of the modems. The processing system 140 and the processing system 145 may also include or be coupled with multiple radios (collectively “the radio” ) , multiple RF chains, or multiple transceivers, each of which may in turn be coupled with one or more of multiple antennas. In some examples, one or more processors of the processing system 140 and / or the processing system 145 include or implement one or more of the radios, RF chains, or transceivers. An RF chain may include one or more filters, mixers, oscillators, amplifiers, analog-to-digital converters (ADCs) , and / or other devices that convert between an analog signal (such as for transmission or reception via an air interface) and a digital signal (such as for processing by the processing system 140 of the UE 120 or by the processing system 145 of the network node 110) .
[0051] A network node 110 and a UE 120 may each include one or multiple antennas or antenna arrays. Typical network nodes 110 and UEs 120 may include multiple antennas, which may be organized or structured into one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays, among other examples. As used herein, the term “antenna” can refer to one or more antennas, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, or one or more antenna arrays. The term “antenna panel” can refer to a group of antennas (such as antenna elements) arranged in an array or panel, which may facilitate beamforming by manipulating parameters associated with the group of antennas. The term “antenna module” may refer to circuitry including one or more antennas as well as one or more other components (such as filters, amplifiers, or processors) associated with integrating the antenna module into a wireless communication device such as the network node 110 and the UE 120.
[0052] A network node 110 may be, may include, or may also be referred to as an NR network node, a 5G network node, a 6G network node, a Node B, a gNB, an access point (AP) , a transmission reception point (TRP) , a network entity, a network element, a network equipment, and / or another type of device, component, or system included in a radio access network (RAN) . In various deployments, a network node 110 may be implemented as a single physical node (for example, a single physical structure) or may be implemented as two or more physical nodes (for example, two or more distinct physical structures) . For example, a network node 110 may be a device or system that implements a part of a radio protocol stack, a device or system that implements a full radio protocol stack (such as a full gNB protocol stack) , or a collection of devices or systems that collectively implement the full radio protocol stack. For example, and as shown, a network node 110 may be an aggregated network node having an aggregated architecture, meaning that the network node 110 may implement a full radio protocol stack that is physically and logically integrated within a single physical structure in the wireless communication network 100. For example, an aggregated network node 110 may consist of a single standalone base station or a single TRP that operates with a full radio protocol stack to enable or facilitate communication between a UE 120 and a core network of the wireless communication network 100.
[0053] Alternatively, and as also shown, a network node 110 may be a disaggregated network node (sometimes referred to as a disaggregated base station) , having a disaggregated architecture, meaning that the network node 110 may operate with a radio protocol stack that is physically distributed and / or logically distributed among two or more nodes in the same geographic location or in different geographic locations. An example disaggregated network node architecture is described in more detail below with reference to Fig. 2. In some deployments, disaggregated network nodes 110 may be used in an integrated access and backhaul (IAB) network, in an open radio access network (O-RAN) (such as a network configuration in compliance with the O-RAN Alliance) , or in a virtualized radio access network (vRAN) , also known as a cloud radio access network (C-RAN) , to facilitate scaling by separating network functionality into multiple units or modules that can be individually deployed.
[0054] The network nodes 110 of the wireless communication network 100 may include one or more central units (CUs) , one or more distributed units (DUs) , and one or more radio units (RUs) . A CU may host one or more higher layers, such as a radio resource control (RRC) layer, a packet data convergence protocol (PDCP) layer, and a service data adaptation protocol (SDAP) layer, among other examples. A DU may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and / or one or more higher physical (PHY) layers depending, at least in part, on a functional split, such as a functional split defined by the 3GPP. In some examples, a DU also may host a lower PHY layer that is configured to perform functions, such as a fast Fourier transform (FFT) , an inverse FFT (IFFT) , beamforming, and / or physical random access channel (PRACH) extraction and filtering, among other examples. An RU may perform RF processing functions or lower PHY layer functions, such as an FFT, an IFFT, beamforming, or PRACH extraction and filtering, among other examples, according to a functional split, such as a lower layer split (LLS) . In such an architecture, each RU can be operated to handle over the air (OTA) communication with one or more UEs 120. In some examples, a single network node 110 may include a combination of one or more CUs, one or more DUs, and / or one or more RUs. In some examples, a CU, a DU, and / or an RU may be implemented as a virtual unit, such as a virtual central unit (VCU) , a virtual distributed unit (VDU) , or a virtual radio unit (VRU) , among other examples, which may be implemented as a virtual network function, such as in a cloud deployment.
[0055] Some network nodes 110 (for example, a base station, an RU, or a TRP) may provide communication coverage for a particular geographic area. The term “cell” can refer to a coverage area of a network node 110 or to a network node 110 itself, depending on the context in which the term is used. A network node 110 may support one or more cells (for example, each cell may support communication within an angular (for example, 60 degree) range around the network node) . In some examples, a network node 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (for example, several kilometers in radius) and may allow unrestricted access by UEs 120 with associated service subscriptions. A pico cell may cover a relatively small geographic area and may also allow unrestricted access by UEs 120 with associated service subscriptions. A femto cell may cover a relatively small geographic area (for example, a home) and may allow restricted access by UEs 120 having association with the femto cell (for example, UEs 120 in a closed subscriber group (CSG) ) . In some examples, a cell may not necessarily be stationary. For example, the geographic area of the cell may move according to the location of an associated mobile network node 110 (for example, a train, a satellite, an unmanned aerial vehicle, or an NTN network node) .
[0056] The wireless communication network 100 may be a heterogeneous network that includes network nodes 110 of different types, such as macro network nodes, pico network nodes, femto network nodes, relay network nodes, aggregated network nodes, and / or disaggregated network nodes, among other examples. Various different types of network nodes 110 may generally transmit at different power levels, serve different coverage areas (for example, a cell 130a and a cell 130b) , and / or have different impacts on interference in the wireless communication network 100 than other types of network nodes 110.
[0057] The UEs 120 may be physically dispersed throughout the coverage area of the wireless communication network 100, and each UE 120 may be stationary or mobile. A UE 120 may be, may include, or may also be referred to as an access terminal, a mobile station, or a subscriber unit. A UE 120 may be, include, or be coupled with a cellular phone (for example, a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (for example, a smart watch, smart clothing, smart glasses, a smart wristband, or smart jewelry) , a gaming device, an entertainment device (for example, a music device, a video device, or a satellite radio) , an XR device, a vehicular component or sensor, a smart meter or sensor, industrial manufacturing equipment, a Global Navigation Satellite System (GNSS) device (such as a Global Positioning System device or another type of positioning device) , a UE function of a network node, and / or any other suitable device or function that may communicate via a wireless medium.
[0058] Some UEs 120 may be classified according to different categories in association with different complexities and / or different capabilities. UEs 120 in a first category may facilitate massive IoT in the wireless communication network 100, and may offer low complexity and / or cost relative to UEs 120 in a second category. UEs 120 in a second category may include mission-critical IoT devices, legacy UEs, baseline UEs, high-tier UEs, advanced UEs, full-capability UEs, and / or premium UEs that are capable of URLLC, eMBB, and / or precise positioning in the wireless communication network 100, among other examples. A third category of UEs 120 may have mid-tier complexity and / or capability (for example, a capability between that of the UEs 120 of the first category and that of the UEs 120 of the second capability) . A UE 120 of the third category may be referred to as a reduced capability UE ( “RedCap UE” ) , a mid-tier UE, an NR-Light UE, and / or an NR-Lite UE, among other examples. RedCap UEs may bridge a gap between the capability and complexity of NB-IoT devices and / or eMTC UEs, and mission-critical IoT devices and / or premium UEs. RedCap UEs may include, for example, wearable devices, IoT devices, industrial sensors, or cameras that are associated with a limited bandwidth, power capacity, and / or transmission range, among other examples. RedCap UEs may support healthcare environments, building automation, electrical distribution, process automation, transport and logistics, or smart city deployments, among other examples.
[0059] In some examples, a network node 110 may be, may include, or may operate as an RU, a TRP, or a base station that communicates with one or more UEs 120 via a radio access link (which may be referred to as a “Uu” link) . The radio access link may include a downlink and an uplink. “Downlink” (or “DL” ) refers to a communication direction from a network node 110 to a UE 120, and “uplink” (or “UL” ) refers to a communication direction from a UE 120 to a network node 110. Downlink and uplink resources may include time domain resources (for example, frames, subframes, slots, and symbols) , frequency domain resources (for example, frequency bands, component carriers (CCs) , subcarriers, resource blocks, and resource elements) , and spatial domain resources (for example, particular transmit directions or beams) .
[0060] Frequency domain resources may be subdivided into bandwidth parts (BWPs) . A BWP may be a block of frequency domain resources (for example, a continuous set of resource blocks (RBs) within a full component carrier bandwidth) that may be configured at a UE-specific level. A UE 120 may be configured with both an uplink BWP and a downlink BWP (which may be the same or different) . Each BWP may be associated with its own numerology (indicating a sub-carrier spacing (SCS) and cyclic prefix (CP) ) . A BWP may be dynamically configured or activated (for example, by a network node 110 transmitting a downlink control information (DCI) configuration to the one or more UEs 120) and / or reconfigured (for example, in real-time or near-real-time) according to changing network conditions in the wireless communication network 100 and / or specific requirements of one or more UEs 120. An active BWP defines the operating bandwidth of the UE 120 within the operating bandwidth of the serving cell. The use of BWPs enables more efficient use of the available frequency domain resources in the wireless communication network 100 because fewer frequency domain resources may be allocated to a BWP for a UE 120 (which may reduce the quantity of frequency domain resources that a UE 120 is required to monitor and reduce UE power consumption by enabling the UE to monitor fewer frequency domain resources) , leaving more frequency domain resources to be spread across multiple UEs 120. Thus, BWPs may also assist in the implementation of lower-capability (for example, RedCap) UEs 120 by facilitating the configuration of smaller bandwidths for communication by such UEs 120 and / or by facilitating reduced UE power consumption.
[0061] As used herein, a downlink signal may be or include a reference signal, control information, or data. For example, downlink reference signals include a PSS, an SSS, an SSB (for example, that includes a PSS, an SSS, and a PBCH) , a demodulation reference signal (DMRS) , a phase tracking reference signal (PTRS) , a tracking reference signal (TRS) , and a channel state information (CSI) reference signal (CSI-RS) , among other examples. A downlink signal carrying control information or data may be transmitted via a downlink channel. Downlink channels may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Downlink reference signals may be transmitted in addition to, or multiplexed with, downlink control channel communications and / or downlink data channel communications. A downlink control channel may be specifically used to transmit DCI from a network node 110 to a UE 120. DCI generally contains the information the UE 120 needs to identify RBs in a subsequent subframe and how to decode them, including a modulation and coding scheme (MCS) or redundancy version parameters. Different DCI formats carry different information, such as scheduling information in the form of downlink or uplink grants, slot format indicators (SFIs) , preemption indicators (PIs) , transmit power control (TPC) commands, hybrid automatic repeat request (HARQ) information, new data indicators (NDIs) , among other examples. A downlink data channel may be used to transmit downlink data (for example, user data associated with a UE 120) from a network node 110 to a UE 120. Downlink control channels may include physical downlink control channels (PDCCHs) , and downlink data channels may include physical downlink shared channels (PDSCHs) . Control information or data communications may be transmitted on a PDCCH and PDSCH, respectively. For example, a PDCCH can carry DCI, while a PDSCH can carry a MAC control element (MAC-CE) , an RRC message, or user data, among other examples. Each PDSCH may carry one or more transport blocks (TBs) of data.
[0062] As used herein, an uplink signal may include a reference signal, control information, or data. For example, uplink reference signals include a sounding reference signal (SRS) , a PTRS, and a DMRS, among other examples. An uplink signal carrying control information or data may be transmitted via an uplink channel. An uplink channel may include one or more control channels for transmitting control information and one or more data channels for transmitting data. Uplink reference signals may be transmitted in addition to, or multiplexed with, uplink control channel communications and / or uplink data channel communications. An uplink control channel may be specifically used to transmit uplink control information (UCI) from a UE 120 to a network node 110. An uplink data channel may be used to transmit uplink data (for example, user data associated with a UE 120) from a UE 120 to a network node 110. Uplink control channels may include physical uplink control channels (PUCCHs) , and uplink data channels may include physical uplink shared channels (PUSCHs) . Control information or data communications may be transmitted on a PUCCH and PUSCH, respectively. For example, a PUCCH can carry UCI, while a PUSCH can carry a MAC-CE, an RRC message, or user data, among other examples. UCI can include a scheduling request (SR) , HARQ feedback information (for example, a HARQ acknowledgement (ACK) indication or a HARQ negative acknowledgement (NACK) indication) , uplink power control information (for example, an uplink TPC parameter) , and / or CSI, among other examples. CSI can include a channel quality indicator (CQI) (indicative of downlink channel conditions to facilitate selection of transmission parameters, such as an MCS, by a network node 110) , a precoding matrix indicator (PMI) , a CSI-RS resource indicator (CRI) (for example, indicative of a beam used to transmit a CSI-RS) , an SS / PBCH resource block indicator (SSBRI) (for example, indicative of a beam used to transmit an SSB) , a layer indicator (LI) , a rank indicator (RI) , and / or measurement information (for example, a layer 1 (L1) -reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, among other examples) which can be used for beam management, among other examples. Each PUSCH may carry one or more TBs of data.
[0063] The information (for example, data, control information, or reference signal information) transmitted by a network node 110 to a UE 120, or vice versa, may be represented as a sequence of binary bits that are mapped (for example, modulated) to an analog signal waveform (for example, a discrete Fourier transform (DFT) -spread-orthogonal frequency division multiplexing (OFDM) (DFT-s-OFDM) waveform or a CP-OFDM waveform) that is transmitted by the network node 110 or UE 120 over a wireless communication channel. In some examples, the network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively) may select an MCS (for example, an order of quadrature amplitude modulation (QAM) , such as 64-QAM, 128-QAM, or 256-QAM, among other examples) for a downlink signal or an uplink signal. For example, the network node 110 may select an MCS for a downlink signal in accordance with UCI received from the UE 120. The network node 110 may transmit, to the UE 120, an indication of the selected MCS for the downlink signal, such as via DCI that schedules the downlink signal. As another example, the network node 110 may transmit, and the UE 120 may receive, an indication of an MCS to be applied for the one or more uplink signals, such as via DCI scheduling transmission of the one or more uplink signals.
[0064] The network node 110 or the UE 120 (such as by using the processing system 145 or the processing system 140, respectively, and / or one or more coupled modems) may perform signal processing on the information (such as filtering, amplification, modulation, digital-to-analog conversion, an IFFT operation, multiplexing, interleaving, mapping, and / or encoding, among other examples) to generate a processed signal in accordance with the selected MCS. In some examples, the network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively, and / or one or more coupled encoders or modems) may perform a channel coding operation or a forward error correction (FEC) operation to control errors in transmitted information. For example, the network node 110 or the UE 120 may perform an encoding operation to generate encoded information (such as by selectively introducing redundancy into the information, typically using an error correction code (ECC) , such as a polar code or a low-density parity-check (LDPC) code) . The network node 110 or the UE 120 (for example, using the processing system 145 and / or one or more modems) may further perform spatial processing (for example, precoding) on the encoded information to generate one or more processed or precoded signals for downlink or uplink transmission, respectively. In some examples, the network node 110 or the UE 120 may perform codebook-based precoding or non-codebook-based precoding. Codebook-based precoding may involve selecting a precoder (for example, a precoding matrix) using a codebook. For example, the network node 110 may provide precoding information indicating which precoder, defined by the codebook, is to be used by the UE 120. Non-codebook-based precoding may involve selecting or deriving a precoder based on, or otherwise associated with, one or more downlink or uplink signal measurements. The network node 110 or the UE 120 may transmit the processed downlink or uplink signals, respectively, via one or more antennas.
[0065] The network node 110 or the UE 120 may receive uplink signals or downlink signals, respectively, via one or more antennas. The network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively, and / or one or more coupled modems) may perform signal processing (for example, in accordance with the MCS) on the received uplink or downlink signals, respectively (such as filtering, amplification, demodulation, analog-to-digital conversion, an FFT operation, demultiplexing, deinterleaving, de-mapping, equalization, interference cancellation, and / or decoding, among other examples) , to map the received signal (s) to a sequence of binary bits (for example, received information) that estimates the information transmitted by the network node 110 or the UE 120 via the downlink or uplink signals. The network node 110 or the UE 120 (for example, using the processing system 145 or the processing system 140, respectively, and / or a coupled decoder or one or more modems) may decode the received information (such as by using an ECC, a decoding operation, and / or an FEC operation) to detect errors and / or correct bit errors in the received information to generate decoded information. The decoded information may estimate the information transmitted via the downlink or uplink signals.
[0066] In some examples, a UE 120 and a network node 110 may perform MIMO communication. “MIMO” generally refers to transmitting or receiving multiple signals (such as multiple layers or multiple data streams) simultaneously over the same time and frequency resources. MIMO techniques generally exploit multipath propagation. A network node 110 and / or UE 120 may communicate using massive MIMO, multi-user MIMO, or single-user MIMO, which may involve rapid switching between beams or cells. For example, the amplitudes and / or phases of signals transmitted via antenna elements and / or sub-elements may be modulated and shifted relative to each other (such as by manipulating a phase shift, a phase offset, and / or an amplitude) to generate one or more beams, which is referred to as beamforming. For example, the network node 110b may generate one or more beams 160a, and the UE 120b may generate one or more beams 160b. The term “beam” may refer to a directional transmission of a wireless signal toward a receiving device or otherwise in a desired direction, a directional reception of a wireless signal from a transmitting device or otherwise in a desired direction, a direction associated with a directional transmission or directional reception, a set of directional resources associated with a signal transmission or signal reception (for example, an angle of arrival, a horizontal direction, and / or a vertical direction) , a set of parameters that indicate one or more aspects of a directional signal, a direction associated with the signal, and / or a set of directional resources associated with the signal, among other examples.
[0067] MIMO may be implemented using various spatial processing or spatial multiplexing operations. In some examples, MIMO may include a massive MIMO technique which may be associated with an increased (for example, “massive” ) quantity of antennas at the network node 110 and / or at the UE 120, such as in a network implementing mmWave technology. Massive MIMO may improve communication reliability by enabling a network node 110 and / or a UE 120 to communicate the same data across different propagation (or spatial) paths. In some examples, MIMO may support simultaneous transmission to multiple receivers, referred to as multi-user MIMO (MU-MIMO) . Some RATs may employ MIMO techniques, such as multi-TRP (mTRP) operation (including redundant transmission or reception on multiple TRPs) , reciprocity in the time domain or the frequency domain, single-frequency-network (SFN) transmission, or non-coherent joint transmission (NC-JT) .
[0068] To support MIMO techniques, the network node 110 and the UE 120 may perform one or more beam management operations, such as an initial beam acquisition operation, one or more beam refinement operations, and / or a beam recovery operation. For example, an initial beam acquisition operation may involve the network node 110 transmitting signals (for example, SSBs, CSI-RSs, or other signals) via respective beams (for example, of the beams 160a of the network node 110) and the UE 120 receiving and measuring the signal (s) via respective beams of multiple beams (for example, from the beams 160b of the UE 120) to identify a best beam (or beam pair) for communication between the UE 120 and the network node 110. For example, the UE 120 may transmit an indication (for example, in a message associated with a random access channel (RACH) operation) of a (best) identified beam of the network node 110 (for example, by indicating an SSBRI or other identifier associated with the beam) . A beam refinement operation may involve a first device (for example, the UE 120 or the network node 110) transmitting signal (s) via a subset of beams (for example, identified based on, or otherwise associated with, measurements reported as part of one or more other beam management operations) . A second device (for example, the network node 110 or the UE 120) may receive the signal (s) via a single beam (for example, to identify the best beam for communication from the subset of beams) . The beam (s) may be identified via one or more spatial parameters, such as a transmission configuration indicator (TCI) state and / or a quasi co-location (QCL) parameter, among other examples. The network node 110 and the UE 120 may increase reliability and / or achieve efficiencies in throughput, signal strength, and / or other signal properties for massive MIMO operations by performing the beam management operations.
[0069] Network energy saving (NES) and / or network energy efficiency measures are expected to have increased importance in wireless network operations for various reasons, such as climate change mitigation, environmental sustainability, and / or network cost reduction, among other examples. For example, although NR generally offers a significant energy efficiency improvement per gigabyte over previous generations (for example, LTE) , new NR use cases and / or the adoption of millimeter wave frequencies may require more network sites, more network antennas, larger bandwidths, and / or more frequency bands, among other examples which may lead to more efficient wireless networks that nonetheless have higher energy requirements and / or cause more emissions than previous wireless network generations. Furthermore, energy accounts for a significant proportion of the cost to operate a wireless network. For example, according to some estimates, energy costs are about one-fourth the total cost to operate a wireless network, and over 90%of network operating costs are spent on energy (for example, fuel and electricity) . The largest proportion of energy consumption and / or energy costs are associated with a RAN, which accounts for about half of the energy consumption in a wireless network, with data centers and fiber transport accounting for smaller shares. Accordingly, measures to increase network energy savings and / or improve network energy efficiency are factors that may drive adoption and / or expansion of wireless networks.
[0070] In some examples, a UE 120 or network node 110 may implement power saving features (also referred to as energy saving features) . Power saving features may include, for example, relaxed radio resource monitoring (such as relaxed reference signal monitoring for devices operating in low mobility or in good radio conditions) , discontinuous reception (DRX) operation, reduced PDCCH monitoring during DRX active times, on-demand system information transmission, on-demand SSB transmission, antenna port adaptation, advanced CSI reporting, and / or power-efficient paging reception.
[0071] In some examples, a UE 120 may operate in association with a DRX configuration (for example, indicated to the UE 120 by a network node 110) . DRX operation may enable the UE 120 to enter a sleep mode or state at various times while in the coverage area of a network node 110 to reduce power consumption for conserving battery resources, among other examples. The DRX configuration generally configures the UE 120 to operate in association with a DRX cycle. The UE 120 may repeat DRX cycles with a configured periodicity according to the DRX configuration. A DRX cycle may include a DRX on duration during which the UE 120 is in an awake mode or in an active state. A DRX cycle may also include one or more durations during which the UE 120 may operate in an inactive state. The one or more durations in which the UE 120 may operate in an inactive state may be opportunities for the UE 120 to enter a DRX sleep mode in which the UE 120 may refrain from monitoring for communications from a network node 110. Additionally or alternatively, the UE 120 may deactivate one or more antennas, RF chains, and / or other hardware components or devices while operating in the DRX sleep mode.
[0072] The time during which the UE 120 is configured to be in an active state during a DRX on duration may be referred to as an active time, and the time during which the UE 120 is configured to be in an inactive state, such as during a DRX sleep duration, may be referred to as an inactive time. During a DRX on duration, the UE 120 may monitor for downlink communications from one or more network nodes 110. If the UE 120 does not detect and / or does not successfully decode any downlink communications during the DRX on duration, the UE 120 may enter a DRX sleep mode for the inactive time duration at the end of the DRX on duration. If the UE 120 detects and / or successfully decodes a downlink communication during the DRX on duration, the UE 120 may remain in the active state for the duration of a DRX inactivity timer (which may extend the active time) . The UE 120 may start the DRX inactivity timer at a time at which the downlink communication is received. The UE 120 may remain in the active state until the DRX inactivity timer expires, at which time the UE 120 may transition to the sleep mode for an inactive time duration. Additionally or alternatively, the UE 120 may use a DRX cycle referred to as an extended DRX (eDRX) cycle, such as for use cases that are tolerant to latency. An eDRX cycle may include a relatively longer inactive time relative to a baseline DRX cycle (for example, an eDRX cycle may have a lower ratio of active time to inactive time) .
[0073] Some aspects and techniques as described herein may be implemented, at least in part, using an artificial intelligence (AI) program (for example, referred to herein as an “AI / ML model” ) , such as a program that includes a machine learning (ML) model and / or an artificial neural network (ANN) model. The AI / ML model may be deployed at one or more devices 165 (for example, one or more network nodes 110, one or more UEs 120, and / or one or more servers, and / or one or more components of a cloud computing network, among other examples) . For example, in an deployment where AI / ML functionality is performed independently at a device 165, sometimes referred to as “overlay AI / ML” , the AI / ML model (or an instance or portion of the AI / ML model) may be deployed at a UE 120 (for example, at the processing system 140) , a network node 110 (for example, at the processing system 145) , one or more servers, and / or one or more components of a cloud computing network, among other examples. Additionally or alternatively, in a deployment where AI / ML functionality is coordinated between different devices 165, sometimes referred to as “coordinated AI / ML” , or performed at all device and network layers, sometimes referred to as “native AI / ML” , the AI / ML model (or an instance of the AI / ML model) may be deployed at multiple devices 165 (for example, a first portion of the AI / ML model may be deployed at a UE 120 and a second portion of the AI / ML model may be deployed at a network node 110) . In other examples of coordinated AI / ML and / or native AI / ML, a first AI / ML model may be deployed at a UE 120 and a second AI / ML model may be deployed at a network node 110. The AI / ML model (s) may be configured to enhance various aspects of the wireless communication network 100 (for example, to increase privacy, reliability, and / or efficient use of network bandwidth, and / or to reduce latency, among other examples) . For example, the AI / ML model (s) may be trained to identify patterns or relationships in data corresponding to the wireless communication network 100, a device, and / or an air interface, among other examples. The AI / ML model (s) may support operational decisions relating to one or more aspects associated with wireless communications devices, networks, or services.
[0074] Accordingly, in some examples, the AI / ML model (s) may enable AI-as-a-Service (for example, an end-to-end AI / ML service via a user plane) for use cases such as a self-organizing network (SON) , minimization of drive test (MDT) , quality of experience (QoE) , positioning, sensing, predictive mobility, and / or traffic prediction, among other examples. In some examples, AI-as-a-Service use cases may include measurement collection reporting by a UE 120, device selection criteria (for example, according to a geographical area where measurements are to be collected and / or UE capabilities to be used to collected measurements) , and / or reporting configurations (for example, reporting parameters such as location, time, and / or sensor information, among other examples) . Additionally or alternatively, the AI / ML model (s) may enable AI / ML procedures (for example, RAN-triggered service establishment, configuration, inferencing using UE-side and / or network-side models, performance monitoring and / or management, and / or capability signaling, among other examples) . Additionally or alternatively, the AI / ML model (s) may enable RAN-based AI / ML services via one or more application program interfaces (APIs) and / or management interfaces for use cases such as beam management, radio resource monitoring (RRM) relaxation, mobility prediction, load prediction, network energy savings, and / or coverage and capacity improvements, among other examples) .
[0075] In some aspects, a UE 120 may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may receive a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities; and receive an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity. Additionally, or alternatively, the communication manager 150 may perform one or more other operations described herein.
[0076] In some aspects, a network node 110 may include a communication manager 155. As described in more detail elsewhere herein, the communication manager 155 may transmit a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities; and periodically transmit an SSB burst in accordance with the SSB burst periodicity. Additionally, or alternatively, the communication manager 155 may perform one or more other operations described herein.
[0077] Fig. 2 is a diagram illustrating an example disaggregated network node architecture 200, in accordance with the present disclosure. One or more components of the example disaggregated network node architecture 200 may be, may include, or may be included in one or more network nodes (such one or more network nodes 110) . The disaggregated network node architecture 200 may include a CU 210 that can communicate directly with a core network 220 via a backhaul link, or that can communicate indirectly with the core network 220 via one or more disaggregated control units, such as a non-real-time (Non-RT) RAN intelligent controller (RIC) 250 associated with a Service Management and Orchestration (SMO) Framework 260 and / or a near-real-time (Near-RT) RIC 270 (for example, via an E2 link) . The CU 210 may communicate with one or more DUs 230 via respective midhaul links, such as via F1 interfaces. Each of the DUs 230 may communicate with one or more RUs 240 via respective fronthaul links. Each of the RUs 240 may communicate with one or more UEs 120 via respective RF access links. In some deployments, a UE 120 may be simultaneously served by multiple RUs 240.
[0078] Each of the components of the disaggregated network node architecture 200, including the CUs 210, the DUs 230, the RUs 240, the Near-RT RICs 270, the Non-RT RICs 250, and the SMO Framework 260, may include one or more interfaces or may be coupled with one or more interfaces for receiving or transmitting signals, such as data or information, via a wired or wireless transmission medium.
[0079] In some aspects, the CU 210 may be logically split into one or more CU user plane (CU-UP) units and one or more CU control plane (CU-CP) units. A CU-UP unit may communicate bidirectionally with a CU-CP unit via an interface, such as the E1 interface when implemented in an O-RAN configuration. The CU 210 may be deployed to communicate with one or more DUs 230, as necessary, for network control and signaling. Each DU 230 may correspond to a logical unit that includes one or more base station functions to control the operation of one or more RUs 240. For example, a DU 230 may host various layers, such as an RLC layer, a MAC layer, or one or more PHY layers, such as one or more high PHY layers or one or more low PHY layers. Each layer (which also may be referred to as a module) may be implemented with an interface for communicating signals with other layers (and modules) hosted by the DU 230, or for communicating signals with the control functions hosted by the CU 210. Each RU 240 may implement lower layer functionality. In some aspects, real-time and non-real-time aspects of control and user plane communication with the RU (s) 240 may be controlled by the corresponding DU 230.
[0080] The SMO Framework 260 may support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO Framework 260 may 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 260 may interact with a cloud computing platform (such as an open cloud (O-Cloud) platform 290) 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. A virtualized network element may include, but is not limited to, a CU 210, a DU 230, an RU 240, a non-RT RIC 250, and / or a Near-RT RIC 270. In some aspects, the SMO Framework 260 may communicate with a hardware aspect of a 4G RAN, a 5G NR RAN, and / or a 6G RAN, such as an open eNB (O-eNB) 280, via an O1 interface. Additionally or alternatively, the SMO Framework 260 may communicate directly with each of one or more RUs 240 via a respective O1 interface. In some deployments, this configuration can enable each DU 230 and the CU 210 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.
[0081] The Non-RT RIC 250 may include or may implement a logical function that enables non-real-time control and optimization of RAN elements and resources, AI / ML workflows including model training and updates, and / or policy-based guidance of applications and / or features in the Near-RT RIC 270. The Non-RT RIC 250 may be coupled to or may communicate with (such as via an A1 interface) the Near-RT RIC 270. The Near-RT RIC 270 may include or may implement a logical function that enables near-real-time control and optimization of RAN elements and resources via data collection and actions via an interface (such as via an E2 interface) connecting one or more CUs 210, one or more DUs 230, and / or an O-eNB 280 with the Near-RT RIC 270.
[0082] In some aspects, to generate AI / ML models to be deployed in the Near-RT RIC 270, the Non-RT RIC 250 may receive parameters or external enrichment information from external servers. Such information may be utilized by the Near-RT RIC 270 and may be received at the SMO Framework 260 or the Non-RT RIC 250 from non-network data sources or from network functions. In some examples, the Non-RT RIC 250 or the Near-RT RIC 270 may tune RAN behavior or performance. For example, the Non-RT RIC 250 may monitor long-term trends and patterns for performance and may employ AI / ML models to perform corrective actions via the SMO Framework 260 (such as reconfiguration via an O1 interface) or via creation of RAN management policies (such as A1 interface policies) .
[0083] The network node 110, the processing system 145 of the network node 110, the UE 120, the processing system 140 of the UE 120, the CU 210, the DU 230, the RU 240, or any other component (s) of Fig. 1 and / or Fig. 2 may implement one or more techniques or perform one or more operations associated with an indication of an SSB pattern, as described in more detail elsewhere herein. For example, the processing system 145 of the network node 110, the processing system 140 of the UE 120, the CU 210, the DU 230, or the RU 240 may perform or direct operations of, for example, process 600 of Fig. 6, process 700 of Fig. 7, or other processes as described herein (alone or in conjunction with one or more other processors) . Memory of the network node 110 may store data and program code (or instructions) for the network node 110, the CU 210, the DU 230, or the RU 240. In some examples, the memory of the network node 110 may store data relating to a UE 120, such as RRC state information or a UE context. Memory of a UE 120 may store data and program code (or instructions) for the UE 120, such as context information. In some examples, the memory of the UE 120 or the memory of the network node 110 may include a non-transitory computer-readable medium storing a set of instructions for wireless communication. For example, the set of instructions, when executed by one or more processors (for example, of the processing system 145 or the processing system 140) of the network node 110, the UE 120, the CU 210, the DU 230, or the RU 240, may cause the one or more processors to perform process 600 of Fig. 6, process 700 of Fig. 7, or other processes as described herein. In some examples, executing instructions may include running the instructions, converting the instructions, compiling the instructions, and / or interpreting the instructions, among other examples.
[0084] In some aspects, a UE includes means for receiving a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities; and / or means for receiving an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity. The means for the UE to perform operations described herein may include, for example, one or more of communication manager 150, processing system 140, a radio, one or more RF chains, one or more transceivers, one or more antennas, one or more modems, a reception component (for example, reception component 802 depicted and described in connection with Fig. 8) , and / or a transmission component (for example, transmission component 804 depicted and described in connection with Fig. 8) , among other examples.
[0085] In some aspects, a network node includes means for transmitting a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities; and / or means for periodically transmitting an SSB burst in accordance with the SSB burst periodicity. The means for the network node to perform operations described herein may include, for example, one or more of communication manager 155, processing system 145, a radio, one or more RF chains, one or more transceivers, one or more antennas, one or more modems, a reception component (for example, reception component 902 depicted and described in connection with Fig. 9) , and / or a transmission component (for example, transmission component 904 depicted and described in connection with Fig. 9) , among other examples.
[0086] Fig. 3 is a diagram illustrating an example 300 of a synchronization signal (SS) hierarchy, in accordance with the present disclosure. As shown in Fig. 3, the SS hierarchy may include an SS burst set 305, which may include multiple SS bursts 310, shown as SS burst 0 through SS burst N-1, where N is a maximum number of repetitions of the SS burst 310 that may be transmitted by one or more network nodes. As further shown, each SS burst 310 may include one or more SSBs 315, shown as SSB 0 through SSB M-1, where M is a maximum number of SSBs 315 that can be carried by an SS burst 310. In some cases, different SSBs 315 may be beam-formed differently (e.g., transmitted using different beams) , and may be used for cell search, cell acquisition, beam management, and / or beam selection (e.g., as part of an initial network access procedure) . An SS burst set 305 may be periodically transmitted by a wireless node (e.g., a network node 110) , such as every X milliseconds, as shown in Fig. 3. In some cases, an SS burst set 305 may have a fixed or dynamic length, shown as Y milliseconds in Fig. 3. In some cases, the fixed or dynamic length of an SS burst set 305 or a length of an SS burst 310 may be referred to as a discovery signal transmission window or an SSB measurement time configuration (SMTC) window.
[0087] In some cases, an SSB 315 may include resources that carry a PSS 320, an SSS 325, and / or a PBCH 330. In some cases, multiple SSBs 315 are included in an SS burst 310 (e.g., with transmission on different beams) , and the PSS 320, the SSS 325, and / or the PBCH 330 may be the same across each SSB 315 of the SS burst 310. In some cases, a single SSB 315 may be included in an SS burst 310. In some aspects, the SSB 315 may be at least four symbols (e.g., OFDM symbols) in length, where each symbol carries one or more of the PSS 320 (e.g., occupying one symbol) , the SSS 325 (e.g., occupying one symbol) , and / or the PBCH 330 (e.g., occupying two symbols) . In some cases, an SSB 315 may be referred to as an SS / PBCH block.
[0088] In some cases, the symbols of an SSB 315 are consecutive, as shown in Fig. 3. In some cases, the symbols of an SSB 315 are non-consecutive. Similarly, in some cases, one or more SSBs 315 of the SS burst 310 may be transmitted in consecutive radio resources (e.g., consecutive symbols) during one or more slots. Additionally, or alternatively, one or more SSBs 315 of the SS burst 310 may be transmitted in non-consecutive radio resources.
[0089] In some cases, the SS bursts 310 may have a burst period, and the SSBs 315 of the SS burst 310 may be transmitted by a wireless node (e.g., a network node 110) according to the burst period. In this case, the SSBs 315 may be repeated during each SS burst 310. In some cases, the SS burst set 305 may have a burst set periodicity, whereby the SS bursts 310 of the SS burst set 305 are transmitted by the wireless node according to the fixed burst set periodicity. In other words, the SS bursts 310 may be repeated during each SS burst set 305.
[0090] In some cases, an SSB 315 may include an SSB index, which may correspond to a beam used to carry the SSB 315. A UE 120 may monitor for and / or measure SSBs 315 using different receive (Rx) beams during an initial network access procedure and / or a cell search procedure, among other examples. Based at least in part on the monitoring and / or measuring, the UE 120 may indicate one or more SSBs 315 with a best signal parameter (e.g., an RSRP parameter) to a network node 110 (e.g., directly or via one or more other network nodes) . The network node 110 and the UE 120 may use the one or more indicated SSBs 315 to select one or more beams to be used for communication between the network node 110 and the UE 120 (e.g., for a RACH procedure) . Additionally, or alternatively, the UE 120 may use the SSB 315 and / or the SSB index to determine a cell timing for a cell via which the SSB 315 is received (e.g., a serving cell) .
[0091] As indicated above, Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
[0092] Fig. 4 is a diagram illustrating examples 400, 410, 420, 430 of SSB transmission patterns, in accordance with the present disclosure.
[0093] In some cases, as shown by example 400, a network node may be configured to periodically transmit an SSB at a first periodicity (e.g., 20 ms as shown in Fig. 4) in accordance with a non-network-energy-saving SSB transmission pattern. In these cases, the SSB may include a discovery signal (e.g., a PSS) to indicate that a frequency via which the SSB is transmitted is associated with a cell provided by the network node, as described in greater detail elsewhere herein.
[0094] In some cases, to conserve energy, the network node may periodically transmit a discovery signal and an SSB in accordance with a network energy saving SSB transmission pattern. In some cases, the network energy saving SSB transmission pattern may comprise a modified version of the non-network-energy-saving SSB transmission pattern. For example, the network energy saving SSB transmission pattern may correspond one or more of the periodic transmissions of the SSB of the non-network-energy-saving SSB transmission pattern with a transmission of a discovery signal (DS) .
[0095] In some cases, the discovery signal may be a smaller signal relative to the SSB. For example, four symbols may be a minimum number of symbols via which an SSB can be transmitted, while a fewer number of symbols (e.g., 1, 2, or 3 symbols) may be a minimum number of symbols via which a discovery signal can be transmitted. Because the discovery signal is a smaller signal relative to the SSB, replacing a periodic transmission of the SSB with a transmission of the discovery signal may reduce an amount of data being transmitted by the network node and / or a quantity of resources utilized by the network node. Reducing the amount of data and / or the quantity of resources may enable a network node to conserve an amount of energy that would otherwise be utilized to transmit the additional amount of data and / or to utilize the additional resources to transmit the SSB rather than the discovery signal.
[0096] In some cases, the one or more periodic transmissions of the SSB may be replaced by a transmission of a discovery signal based at least in part on the discovery signal being transmitted at a second periodicity that is less than the first periodicity at which the SSB is transmitted. For example, the discovery signal may be transmitted at a second periodicity of 20 ms and the SSB may be transmitted at a first periodicity of 40 ms (e.g., as shown by example 410) , the discovery signal may be transmitted at a second periodicity of 20 ms and the SSB may be transmitted at a first periodicity of 80 ms (e.g., as shown by example 420) , or the discovery signal may be transmitted at a second periodicity of 20 ms and the SSB may be transmitted at a first periodicity of 160 ms (e.g., as shown by example 430) , among other examples.
[0097] In some cases, the second periodicity at which the discovery signal is transmitted may be equal to the first periodicity at which the SSB is transmitted in accordance with the non-network-energy-saving SSB transmission pattern. For example, the second periodicity may be equal to the first periodicity in accordance with the non-network-energy-saving SSB transmission pattern in order to maintain a same cell presence detection latency (e.g., an amount of time for a UE to detect a discovery signal or SSB) .
[0098] As indicated above, Fig. 4 is provided as an example. Other examples may differ from what is described with respect to Fig. 4.
[0099] Figs. 5A-5C are diagrams illustrating an example 500 associated with an indication of an SSB pattern, in accordance with the present disclosure. As shown in Fig. 5A, a network node 110 and a UE 120 may communicate with one another.
[0100] As shown by reference number 505, in some aspects, the network node 110 may transmit, and the UE 120 may receive, configuration information. In some aspects, the network node 110 may transmit the configuration information to the UE 120 based at least in part on the UE 120 being connected to the network node 110. For example, the network node 110 may transmit the configuration information based at least in part on the UE 120 performing an initial access procedure and / or the UE 120 transitioning from an idle mode to an active mode, among other examples.
[0101] In some aspects, the network node 110 may refrain from transmitting any configuration information to the UE 120. For example, the UE 120 may be configured to determine the configuration information based at least in part on information included in a discovery signal and / or an SSB transmitted by the network node 110, as described in greater detail below.
[0102] In some aspects, the network node 110 may refrain from transmitting one or more portions of the configuration information to the UE 120. For example, the UE 120 may be pre-configured with one or more portions of the configuration information, and the network node 110 may refrain from transmitting the one or more portions of the configuration information based at least in part on the UE 120 being pre-configured with the one or more portions of the configuration information. Additionally, or alternatively, the network node 110 may refrain from transmitting the one or more portions of the configuration information based at least in part on the UE 120 being configured to determine the configuration information, based at least in part on information included in a discovery signal and / or an SSB transmitted by the network node 110, as described in greater detail below.
[0103] In some aspects, the configuration information may indicate a periodicity at which a discovery signal is transmitted by the network node 110 (e.g., a DS periodicity) . In some aspects, the DS periodicity may correspond to an SSB periodicity associated with a non-network-energy-saving SSB transmission pattern (e.g., 20 ms) .
[0104] In some aspects, the configuration information may indicate a plurality of SSB periodicities (e.g., a plurality of periodicities at which an SSB and / or an SSB burst may be transmitted) . For example, the network node 110 may be configured to vary an SSB periodicity between a plurality of different SSB periodicities and the configuration information may indicate a group of SSB periodicities, of the plurality of different SSB periodicities.
[0105] In some aspects, the plurality of SSB periodicities may include the SSB periodicity associated with the non-network-energy-saving SSB transmission pattern (e.g., 20 ms) . In some aspects, the plurality of SSB periodicities may include one or more SSB periodicities associated with one or more energy saving SSB transmission patterns.
[0106] In some aspects, the configuration information may indicate an identifier associated with an SSB periodicity. In some aspects, the identifier may be an index value. For example, the UE 120 may be configured with a plurality of SSB periodicities. Each SSB periodicity may be associated with a respective index and the configuration information may include information indicating the respective indexes associated with a group of SSB periodicities at which the SSB may be transmitted.
[0107] In some aspects, the identifier may be a value to which a set of bits correspond. For example, the configuration information may indicate that a set of bits included in a field of a discovery signal is set to a first value (e.g., 0) to indicate a first SSB periodicity (e.g., 20 ms) and that the set of bits is set to a second value (e.g., 1) to indicate a second SSB periodicity (e.g., 40 ms, 80 ms, and / or 160 ms, among other examples) .
[0108] In some aspects, the identifier may comprise a sequence of bits included in a discovery signal. For example, the configuration information may indicate that a discovery signal that includes a first sequence of one or more bits indicates a first SSB periodicity and that a discovery signal that includes a second, different sequence of bits indicates a second SSB periodicity.
[0109] In some aspects, the first sequence and / or the second sequence may comprise a Zadoff-Chu (ZC) sequence based sequence. In some aspects, the first sequence and the second sequence may be conjugate sequences.
[0110] In some aspects, the identifier may comprise a pattern or a sequence of discovery signals. For example, the configuration information may indicate that a transmission of only a first discovery signal indicates a first SSB periodicity (as shown in Fig. 5B, and indicated by reference number 510) , a transmission of only a second discovery signal indicates a second SSB periodicity (as shown in Fig. 5B, and indicated by reference number 515) , and a transmission of the first discovery signal followed by the second discovery signal (or vice versa) indicates a third SSB periodicity (as shown in Fig. 5B, and indicated by reference number 520) , among other examples.
[0111] In some aspects, the configuration information may include information associated with receiving and / or decoding a discovery signal and / or an SSB. For example, the configuration information may indicate whether the UE 120 is to utilize combining to decode a discovery signal, a quantity of discovery signals the UE 120 is to combine to decode the discovery signal, whether the UE 120 is to utilize combining to decode an SSB, and / or a quantity of SSBs the UE is to combine to decode the SSB, among other examples.
[0112] As shown in Fig. 5A, and by reference number 525, the network node 110 may transmit, and the UE 120 may receive, a discovery signal. In some aspects, the network node 110 may transmit the discovery signal to indicate a presence of a cell provided by the network node 110. For example, the network node 110 may transmit the discovery signal via a particular frequency to indicate the presence of the cell associated with the particular frequency.
[0113] In some aspects, the UE 120 may receive the discovery signal based at least in part on monitoring the frequency via which the discovery signal is transmitted, to determine whether the frequency is associated with a cell provided by a network node (e.g., the network node 110) . For example, the UE 120 may receive the discovery signal based at least in part on monitoring the frequency via which the discovery signal is transmitted, in a manner similar to that described elsewhere herein.
[0114] In some aspects, the UE 120 may receive the discovery signal based at least in part on monitoring the frequency via which the discovery signal is transmitted in accordance with a default periodicity. For example, the UE 120 may not receive configuration information from the network node 110, or the configuration information may not indicate the DS periodicity. The UE 120 may monitor a frequency for a transmission of a signal (e.g., a discovery signal and / or an SSB) in accordance with the default periodicity based at least in part on not receiving the configuration information or based at least in part on the configuration information not indicating the DS periodicity.
[0115] In some aspects, the default periodicity may be indicated in the configuration information. In some aspects, the default periodicity may correspond to the SSB periodicity associated with the non-network-energy-saving SSB transmission pattern.
[0116] In some aspects, the SSB periodicity associated with the non-network-energy-saving SSB transmission pattern may be indicated in the configuration information. Additionally, or alternatively, the SSB periodicity associated with the non-network-energy-saving SSB transmission pattern may be (pre-) configured at the UE 120.
[0117] In some aspects, the UE 120 may determine an SSB periodicity based at least in part on the discovery signal. For example, the discovery signal may include information indicating an SSB periodicity, and the UE 120 may determine the SSB periodicity based at least in part on the information included in the discovery signal.
[0118] In some aspects, the information included in the discovery signal may be a set of one or more bits (e.g., in a field of the discovery signal) . The UE 120 may determine a value to which the set of one or more bits correspond. The UE 120 may identify an SSB periodicity associated with the value. The UE 120 may determine that the SSB is transmitted at the identified SSB periodicity based at least in part on the SSB periodicity being associated with the value.
[0119] In some aspects, the set of one or more bits may comprise a sequence of bits. The UE 120 may identify an SSB periodicity associated with the sequence of bits. The UE 120 may determine that the SSB is transmitted at the identified SSB periodicity based at least in part on the SSB periodicity being associated with the sequence of bits.
[0120] In some aspects, the network node 110 may transmit multiple discovery signals and the UE 120 may determine the SSB periodicity based at least in part on the multiple discovery signals. In some aspects, the UE 120 may decode the discovery signal based at least in part on combining the multiple discovery signals, as described elsewhere herein. In these aspects, the UE 120 may determine the SSB periodicity based at least in part on information included in the SSB periodicity, in a manner similar to that described elsewhere herein.
[0121] In some aspects, the UE 120 may determine the SSB periodicity based at least in part on a sequence or pattern associated with a transmission of the multiple discovery signals. For example, the UE 120 may determine that the SSB periodicity comprises a first SSB periodicity based at least in part on each of the multiple discovery signals comprising a first discovery signal (e.g., as shown in Fig. 5B, and as indicated by reference number 510) .
[0122] As another example, the UE 120 may determine that the SSB periodicity comprises a second SSB periodicity based at least in part on each of the multiple discovery signals comprising a second discovery signal (e.g., as shown in Fig. 5B, and as indicated by reference number 515) . As another example, the UE 120 may determine that the SSB periodicity comprises a third SSB periodicity based at least in part on the multiple discovery signals alternating between a first discovery signal and a second discovery signal (e.g., as shown in Fig. 5B, and as indicated by reference number 520) .
[0123] In some aspects, the multiple discovery signals may include discovery signals received during a sliding or moving time window. For example, as shown in Fig. 5C, and by reference number 530, the multiple discovery signals may include the discovery signals detected during an initial window 535.
[0124] In some aspects, the UE 120 may determine a first SSB periodicity based at least in part on the multiple discovery signals received during the initial window 535. In some aspects, upon an expiration of the initial window 535, the UE 120 may determine a subsequent sliding window 540 based at least in part on sliding or moving the sliding window to a subsequent position. The UE 120 may determine a second SSB periodicity based at least in part on the multiple discovery signals received during the subsequent sliding window 540.
[0125] In some aspects, the sliding window may be associated with a maximum search duration 545. In these aspects, the UE 120 may continue sliding or moving the sliding window and may determine additional discovery signals in a manner similar to that described above until an expiration of the sliding window corresponds to an expiration of the maximum search duration 545.
[0126] In some aspects, the maximum search duration 545 is determined based at least in part on the DS periodicity. For example, the maximum search duration 545 may comprise an integer multiple of the DS periodicity.
[0127] Additionally, or alternatively, the maximum search duration 545 may be determined based at least in part on a duration of a sequence or a pattern of discovery signals transmitted by the network node 110. In some aspects, the network node 110 may transmit a plurality of discovery signals in accordance with a uniform sequence or pattern and the maximum search duration 545 may correspond to a sum of the DS periodicity and a duration of the uniform sequence or pattern. In some aspects, the network node 110 may transmit a plurality of discovery signals in accordance with a non-uniform sequence or pattern, and the maximum search duration 545 may correspond to a sum of the DS periodicity and a duration of the non-uniform sequence or pattern.
[0128] In some aspects, the first SSB periodicity may be the same as the second SSB periodicity. In these aspects, the UE 120 may determine the SSB periodicity as corresponding to the first and second SSB periodicities based at least in part on the first and second periodicities corresponding to the same periodicity.
[0129] In some aspects, as shown by reference number 550, the first SSB periodicity may be different from the second SSB periodicity. In these aspects, the UE 120 may determine a first SSB periodicity based at least in part on the multiple discovery signals received during the initial window 555. In some aspects, upon an expiration of the initial window 555, the UE 120 may determine a subsequent sliding window 560 based at least in part on sliding or moving the sliding window to a subsequent position. The UE 120 may determine a second SSB periodicity based at least in part on the multiple discovery signals received during the subsequent sliding window 560.
[0130] In some aspects, the UE 120 may determine the SSB periodicity as corresponding to the second SSB periodicity based at least in part on the second SSB periodicity being determined based at least in part on the multiple discovery signals received during the subsequent sliding window 560. In some aspects, the UE 120 may continue sliding or moving the sliding window and may determine additional discovery signals in a manner similar to that described above until an SSB periodicity determined based at least in part on multiple discovery signals received during a current sliding window is the same as an SSB periodicity determined based at least in part on multiple discovery signals received during a sliding window immediately prior to the current sliding window.
[0131] As shown in Fig. 5A, and by reference number 565, the network node 110 may transmit, and the UE 120 may receive, an SSB based at least in part on monitoring a frequency in accordance with the determined SSB periodicity. In some aspects, the network node 110 may transmit, and the UE 120 may receive, multiple SSBs and the UE 120 may decode the SSB based at least in part on combining the multiple SSBs, in a manner similar to that described elsewhere herein.
[0132] As shown by reference number 570, the network node 110 and the UE 120 may communicate based at least in part on the SSB. For example, the UE 120 may determine timing information associated with communicating with the network node 110 based at least in part on the SSB, and the UE 120 may utilize the timing information to transmit and / or receive communications between the UE 120 and the network node 110.
[0133] As indicated above, Figs. 5A-5C are provided as an example. Other examples may differ from what is described with respect to Figs. 5A-5C.
[0134] Fig. 6 is a diagram illustrating an example process 600 performed, for example, at a UE or an apparatus of a UE, in accordance with the present disclosure. Example process 600 is an example where the apparatus or the UE (e.g., UE 120) performs operations associated with an indication of an SSB pattern.
[0135] As shown in Fig. 6, in some aspects, process 600 may include receiving a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities (block 610) . For example, the UE (e.g., using reception component 802 and / or communication manager 806, depicted in Fig. 8) may receive a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities, as described above.
[0136] In some aspects, a network node (e.g., a network node 110) may transmit the discovery signal to indicate a presence of a cell provided by the network node. In some aspects, the UE may receive the discovery signal based at least in part on monitoring the frequency via which the discovery signal is transmitted to determine whether the frequency is associated with a cell provided by a network node (e.g., a network node 110) .
[0137] As further shown in Fig. 6, in some aspects, process 600 may include receiving an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity (block 620) . For example, the UE (e.g., using reception component 802 and / or communication manager 806, depicted in Fig. 8) may receive an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity, as described above.
[0138] In some aspects, the UE may determine the SSB burst periodicity based at least in part on the discovery signal. For example, the discovery signal may include information indicating an SSB burst periodicity and the UE 120 may determine the SSB burst periodicity based at least in part on the information included in the discovery signal.
[0139] Process 600 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0140] In a first aspect, the discovery signal includes an indicator associated with the SSB burst periodicity.
[0141] In a second aspect, alone or in combination with the first aspect, the discovery signal comprises a PSS.
[0142] In a third aspect, alone or in combination with one or more of the first and second aspects, the indicator comprises a single bit, wherein the single bit is set to a first value to indicate the SSB burst periodicity, and wherein the single bit is set to a second value to indicate another SSB burst periodicity of the plurality of SSB burst periodicities.
[0143] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in an idle state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in a connected state.
[0144] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in a connected state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in an idle state.
[0145] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the UE is configured to receive one or more of a first discovery signal associated with a first sequence or a second discovery signal associated with a second sequence that is different from the first sequence, wherein the SSB burst periodicity corresponds to a first SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal, wherein the SSB burst periodicity corresponds to a second SSB burst periodicity based at least in part on the discovery signal comprising the second discovery signal, and wherein the SSB burst periodicity corresponds to a third SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal and the second discovery signal.
[0146] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the discovery signal is periodically transmitted, and the discovery signal is received with combining based at least in part on the discovery signal being periodically transmitted.
[0147] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the discovery signal comprises a first discovery signal, and receiving the discovery signal comprises periodically receiving the first discovery signal and a second discovery signal, wherein the SSB burst periodicity is determined based at least in part on a sequence in which the first discovery signal and the second discovery signal are periodically received.
[0148] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the SSB is transmitted in accordance with a non-uniform pattern, and the SSB is received based at least in part on searching for multiple combinable SSBs during a second time period corresponding to a sliding window.
[0149] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the time period corresponding to the sliding window is associated with a maximum search duration within which the sliding window moves.
[0150] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the maximum search duration corresponds to a sum of a value corresponding to a periodicity associated with the non-uniform pattern and a duration of the non-uniform pattern.
[0151] In a twelfth aspect, alone or in combination with one or more of the first through eleventh aspects, the SSB is received with combining based at least in part on monitoring the communication channel for a plurality of first time periods.
[0152] Although Fig. 6 shows example blocks of process 600, in some aspects, process 600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 6. Additionally, or alternatively, two or more of the blocks of process 600 may be performed in parallel.
[0153] Fig. 7 is a diagram illustrating an example process 700 performed, for example, at a network node or an apparatus of a network node, in accordance with the present disclosure. Example process 700 is an example where the apparatus or the network node (e.g., network node 110) performs operations associated with an indication of an SSB pattern.
[0154] As shown in Fig. 7, in some aspects, process 700 may include transmitting a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities (block 710) . For example, the network node (e.g., using transmission component 904 and / or communication manager 906, depicted in Fig. 9) may transmit a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities, as described above.
[0155] In some aspects, the network node may transmit the discovery signal to indicate a presence of a cell provided by the network node. In some aspects, a UE (e.g., a UE 120) may receive the discovery signal based at least in part on monitoring the frequency via which the discovery signal is transmitted to determine whether the frequency is associated with a cell provided by the network node.
[0156] As further shown in Fig. 7, in some aspects, process 700 may include periodically transmitting an SSB burst in accordance with the SSB burst periodicity (block 720) . For example, the network node (e.g., using transmission component 904 and / or communication manager 906, depicted in Fig. 9) may periodically transmit an SSB burst in accordance with the SSB burst periodicity, as described above.
[0157] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in connection with one or more other processes described elsewhere herein.
[0158] In a first aspect, the discovery signal includes an indicator associated with the SSB burst periodicity.
[0159] In a second aspect, alone or in combination with the first aspect, the discovery signal comprises a PSS.
[0160] In a third aspect, alone or in combination with one or more of the first and second aspects, the indicator comprises a single bit, wherein the single bit is set to a first value to indicate the SSB burst periodicity, and wherein the single bit is set to a second value to indicate another SSB burst periodicity of the plurality of SSB burst periodicities.
[0161] In a fourth aspect, alone or in combination with one or more of the first through third aspects, the SSB burst periodicity is associated with transmitting the SSB to a UE when the UE is in an idle state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in a connected state.
[0162] In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the SSB burst periodicity is associated with transmitting the SSB to a UE when the UE is in a connected state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in an idle state.
[0163] In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, transmitting the discovery signal comprises transmitting one or more of a first discovery signal associated with a first sequence or a second discovery signal associated with a second sequence that is different from the first sequence, wherein the SSB burst periodicity corresponds to a first SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal, wherein the SSB burst periodicity corresponds to a second SSB burst periodicity based at least in part on the discovery signal comprising the second discovery signal, and wherein the SSB burst periodicity corresponds to a third SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal and the second discovery signal.
[0164] In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, the discovery signal is periodically transmitted to enable the discovery signal to be received with combining.
[0165] In an eighth aspect, alone or in combination with one or more of the first through seventh aspects, the discovery signal comprises a first discovery signal, and transmitting the discovery signal comprises periodically transmitting the first discovery signal and a second discovery signal, wherein the SSB burst periodicity is determined based at least in part on a sequence in which the first discovery signal and the second discovery signal are periodically transmitted.
[0166] In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the SSB is transmitted in accordance with a non-uniform pattern, and multiple combinable SSBs are transmitted during a time period corresponding to a sliding window.
[0167] In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the time period corresponding to the sliding window is associated with a maximum search duration within which the sliding window moves.
[0168] In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the maximum search duration corresponds to a sum of a periodicity associated with the non-uniform pattern and a duration of the non-uniform pattern.
[0169] Although Fig. 7 shows example blocks of process 700, in some aspects, process 700 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 7. Additionally, or alternatively, two or more of the blocks of process 700 may be performed in parallel.
[0170] Fig. 8 is a diagram of an example apparatus 800 for wireless communication, in accordance with the present disclosure. The apparatus 800 may be a UE, or a UE may include the apparatus 800. In some aspects, the apparatus 800 includes a reception component 802, a transmission component 804, and / or a communication manager 806, which may be in communication with one another (for example, via one or more buses and / or one or more other components) . In some aspects, the communication manager 806 is the communication manager 150 described in connection with Fig. 1. As shown, the apparatus 800 may communicate with another apparatus 808, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 802 and the transmission component 804. The communication manager 806 may be included in, or implemented via, a processing system (for example, the processing system 140 described in connection with Fig. 1) of the UE.
[0171] In some aspects, the apparatus 800 may be configured to perform one or more operations described herein in connection with Figs. 3-5C. Additionally, or alternatively, the apparatus 800 may be configured to perform one or more processes described herein, such as process 600 of Fig. 6. In some aspects, the apparatus 800 and / or one or more components shown in Fig. 8 may include one or more components of the UE described in connection with Fig. 1. Additionally, or alternatively, one or more components shown in Fig. 8 may be implemented within one or more components described in connection with Fig. 1. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0172] The reception component 802 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 808. The reception component 802 may provide received communications to one or more other components of the apparatus 800. In some aspects, the reception component 802 may perform signal processing on the received communications, and may provide the processed signals to the one or more other components of the apparatus 800. In some aspects, the reception component 802 may include one or more components of the UE described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the UE.
[0173] The transmission component 804 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 808. In some aspects, one or more other components of the apparatus 800 may generate communications and may provide the generated communications to the transmission component 804 for transmission to the apparatus 808. In some aspects, the transmission component 804 may perform signal processing on the generated communications, and may transmit the processed signals to the apparatus 808. In some aspects, the transmission component 804 may include one or more components of the UE described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the UE described in connection with Fig. 1. In some aspects, the transmission component 804 may be co-located with the reception component 802.
[0174] The communication manager 806 may support operations of the reception component 802 and / or the transmission component 804. For example, the communication manager 806 may receive information associated with configuring reception of communications by the reception component 802 and / or transmission of communications by the transmission component 804. Additionally, or alternatively, the communication manager 806 may generate and / or provide control information to the reception component 802 and / or the transmission component 804 to control reception and / or transmission of communications.
[0175] The reception component 802 may receive a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities. The reception component 802 may receive an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity.
[0176] The number and arrangement of components shown in Fig. 8 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 8. Furthermore, two or more components shown in Fig. 8 may be implemented within a single component, or a single component shown in Fig. 8 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 8 may perform one or more functions described as being performed by another set of components shown in Fig. 8.
[0177] Fig. 9 is a diagram of an example apparatus 900 for wireless communication, in accordance with the present disclosure. The apparatus 900 may be a network node, or a network node may include the apparatus 900. In some aspects, the apparatus 900 includes a reception component 902, a transmission component 904, and / or a communication manager 906, which may be in communication with one another (for example, via one or more buses and / or one or more other components) . In some aspects, the communication manager 906 is the communication manager 155 described in connection with Fig. 1. As shown, the apparatus 900 may communicate with another apparatus 908, such as a UE or a network node (such as a CU, a DU, an RU, or a base station) , using the reception component 902 and the transmission component 904. The communication manager 906 may be included in, or implemented via, a processing system (for example, the processing system 145 described in connection with Fig. 1) of the network node.
[0178] In some aspects, the apparatus 900 may be configured to perform one or more operations described herein in connection with Figs. 3-5C. Additionally, or alternatively, the apparatus 900 may be configured to perform one or more processes described herein, such as process 700 of Fig. 7. In some aspects, the apparatus 900 and / or one or more components shown in Fig. 9 may include one or more components of the network node described in connection with Fig. 1. Additionally, or alternatively, one or more components shown in Fig. 9 may be implemented within one or more components described in connection with Fig. 1. Additionally, or alternatively, one or more components of the set of components may be implemented at least in part as software stored in one or more memories. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-transitory computer-readable medium and executable by one or more controllers or one or more processors to perform the functions or operations of the component.
[0179] The reception component 902 may receive communications, such as reference signals, control information, data communications, or a combination thereof, from the apparatus 908. The reception component 902 may provide received communications to one or more other components of the apparatus 900. In some aspects, the reception component 902 may perform signal processing on the received communications, and may provide the processed signals to the one or more other components of the apparatus 900. In some aspects, the reception component 902 may include one or more components of the network node described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the network node. In some aspects, the reception component 902 and / or the transmission component 904 may include or may be included in a network interface. The network interface may be configured to obtain and / or output signals for the apparatus 900 via one or more communications links, such as a backhaul link, a midhaul link, and / or a fronthaul link.
[0180] The transmission component 904 may transmit communications, such as reference signals, control information, data communications, or a combination thereof, to the apparatus 908. In some aspects, one or more other components of the apparatus 900 may generate communications and may provide the generated communications to the transmission component 904 for transmission to the apparatus 908. In some aspects, the transmission component 904 may perform signal processing on the generated communications, and may transmit the processed signals to the apparatus 908. In some aspects, the transmission component 904 may include one or more components of the network node described above in connection with Fig. 1, such as a radio, one or more RF chains, one or more transceivers, or one or more modems, each of which may in turn be coupled with one or more antennas of the network node described in connection with Fig. 1. In some aspects, the transmission component 904 may be co-located with the reception component 902.
[0181] The communication manager 906 may support operations of the reception component 902 and / or the transmission component 904. For example, the communication manager 906 may receive information associated with configuring reception of communications by the reception component 902 and / or transmission of communications by the transmission component 904. Additionally, or alternatively, the communication manager 906 may generate and / or provide control information to the reception component 902 and / or the transmission component 904 to control reception and / or transmission of communications.
[0182] The transmission component 904 may transmit a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities. The transmission component 904 may periodically transmit an SSB burst in accordance with the SSB burst periodicity.
[0183] The number and arrangement of components shown in Fig. 9 are provided as an example. In practice, there may be additional components, fewer components, different components, or differently arranged components than those shown in Fig. 9. Furthermore, two or more components shown in Fig. 9 may be implemented within a single component, or a single component shown in Fig. 9 may be implemented as multiple, distributed components. Additionally, or alternatively, a set of (one or more) components shown in Fig. 9 may perform one or more functions described as being performed by another set of components shown in Fig. 9.
[0184] The following provides an overview of some Aspects of the present disclosure:
[0185] Aspect 1: A method of wireless communication performed by a UE, comprising: receiving a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities; and receiving an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity.
[0186] Aspect 2: The method of Aspect 1, wherein the discovery signal includes an indicator associated with the SSB burst periodicity.
[0187] Aspect 3: The method of Aspect 2, wherein the discovery signal comprises a PSS.
[0188] Aspect 4: The method of Aspect 3, wherein the indicator comprises a single bit, wherein the single bit is set to a first value to indicate the SSB burst periodicity, and the single bit is set to a second value to indicate another SSB burst periodicity of the plurality of SSB burst periodicities.
[0189] Aspect 5: The method of Aspect 4, wherein the SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in an idle state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in a connected state.
[0190] Aspect 6: The method of Aspect 4, wherein the SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in a connected state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in an idle state.
[0191] Aspect 7: The method of any of Aspects 1-6, wherein the UE is configured to receive one or more of a first discovery signal associated with a first sequence or a second discovery signal associated with a second sequence that is different from the first sequence, the SSB burst periodicity corresponds to a first SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal, the SSB burst periodicity corresponds to a second SSB burst periodicity based at least in part on the discovery signal comprising the second discovery signal, and the SSB burst periodicity corresponds to a third SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal and the second discovery signal.
[0192] Aspect 8: The method of any of Aspects 1-7, wherein the discovery signal is periodically transmitted, and the discovery signal is received with combining based at least in part on the discovery signal being periodically transmitted.
[0193] Aspect 9: The method of any of Aspects 1-8, wherein the discovery signal comprises a first discovery signal, and receiving the discovery signal comprises: periodically receiving the first discovery signal and a second discovery signal, the SSB burst periodicity being determined based at least in part on a sequence in which the first discovery signal and the second discovery signal are periodically received.
[0194] Aspect 10: The method of any of Aspects 1-9, wherein the SSB is transmitted in accordance with a non-uniform pattern, and the SSB is received based at least in part on searching for multiple combinable SSBs during a second time period corresponding to a sliding window.
[0195] Aspect 11: The method of Aspect 10, wherein the time period corresponding to the sliding window is associated with a maximum search duration within which the sliding window moves.
[0196] Aspect 12: The method of Aspect 11, wherein the maximum search duration corresponds to a sum of a value corresponding to a periodicity associated with the non-uniform pattern and a duration of the non-uniform pattern.
[0197] Aspect 13: The method of any of Aspects 1-12, wherein the SSB is received with combining based at least in part on monitoring the communication channel for a plurality of first time periods.
[0198] Aspect 14: A method of wireless communication performed by a network node, comprising: transmitting a discovery signal indicating an SSB burst periodicity of a plurality of SSB burst periodicities; and periodically transmitting an SSB burst in accordance with the SSB burst periodicity.
[0199] Aspect 15: The method of Aspect 14, wherein the discovery signal includes an indicator associated with the SSB burst periodicity.
[0200] Aspect 16: The method of Aspect 15, wherein the discovery signal comprises a PSS.
[0201] Aspect 17: The method of Aspect 15, wherein the indicator comprises a single bit, the single bit is set to a first value to indicate the SSB burst periodicity, and the single bit is set to a second value to indicate another SSB burst periodicity of the plurality of SSB burst periodicities.
[0202] Aspect 18: The method of Aspect 17, wherein the SSB burst periodicity is associated with transmitting the SSB to a UE when the UE is in an idle state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in a connected state.
[0203] Aspect 19: The method of Aspect 17, wherein the SSB burst periodicity is associated with transmitting the SSB to a UE when the UE is in a connected state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in an idle state.
[0204] Aspect 20: The method of any of Aspects 14-19, wherein transmitting the discovery signal comprises: transmitting one or more of a first discovery signal associated with a first sequence or a second discovery signal associated with a second sequence that is different from the first sequence, the SSB burst periodicity corresponding to a first SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal, the SSB burst periodicity corresponding to a second SSB burst periodicity based at least in part on the discovery signal comprising the second discovery signal, and the SSB burst periodicity corresponding to a third SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal and the second discovery signal.
[0205] Aspect 21: The method of any of Aspects 14-20, wherein the discovery signal is periodically transmitted to enable the discovery signal to be received with combining.
[0206] Aspect 22: The method of any of Aspects 14-21, wherein the discovery signal comprises a first discovery signal, and transmitting the discovery signal comprises: periodically transmitting the first discovery signal and a second discovery signal, the SSB burst periodicity being determined based at least in part on a sequence in which the first discovery signal and the second discovery signal are periodically transmitted.
[0207] Aspect 23: The method of any of Aspects 14-22, wherein the SSB is transmitted in accordance with a non-uniform pattern, and multiple combinable SSBs are transmitted during a time period corresponding to a sliding window.
[0208] Aspect 24: The method of Aspect 23, wherein the time period corresponding to the sliding window is associated with a maximum search duration within which the sliding window moves.
[0209] Aspect 25: The method of Aspect 24, wherein the maximum search duration corresponds to a sum of a periodicity associated with the non-uniform pattern and a duration of the non-uniform pattern.
[0210] Aspect 26: An apparatus for wireless communication at a device, the apparatus comprising one or more processors; one or more memories coupled with the one or more processors; and instructions stored in the one or more memories and executable by the one or more processors to cause the apparatus to perform the method of one or more of Aspects 1-25.
[0211] Aspect 27: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors configured to cause the device to perform the method of one or more of Aspects 1-25.
[0212] Aspect 28: An apparatus for wireless communication, the apparatus comprising at least one means for performing the method of one or more of Aspects 1-25.
[0213] Aspect 29: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by one or more processors to perform the method of one or more of Aspects 1-25.
[0214] Aspect 30: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform the method of one or more of Aspects 1-25.
[0215] Aspect 31: A device for wireless communication, the device comprising a processing system that includes one or more processors and one or more memories coupled with the one or more processors, the processing system configured to cause the device to perform the method of one or more of Aspects 1-25.
[0216] Aspect 32: An apparatus for wireless communication at a device, the apparatus comprising one or more memories and one or more processors coupled to the one or more memories, the one or more processors individually or collectively configured to cause the device to perform the method of one or more of Aspects 1-25.
[0217] The foregoing disclosure provides illustration and description but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired from practice of the aspects. No element, act, or instruction described herein should be construed as critical or essential unless explicitly described as such.
[0218] It will be apparent that systems or methods described herein may be implemented in different forms of hardware or a combination of hardware and software. The actual specialized control hardware or software used to implement these systems or methods is not limiting of the aspects. Thus, the operation and behavior of the systems or methods are described herein without reference to specific software code, because those skilled in the art will understand that software and hardware can be designed to implement the systems or methods based, at least in part, on the description herein. A component being configured to perform a function means that the component has a capability to perform the function, and does not require the function to be actually performed by the component, unless noted otherwise.
[0219] As used herein, the articles “a” and “an” are intended to refer to one or more items and may be used interchangeably with “one or more” or “at least one. ” Further, as used herein, the article “the” is intended to include one or more items referenced in connection with the article “the” and may be used interchangeably with “the one or more. ” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more. ” Where only one item is intended, the phrase “only one” or “a single one” or similar language is used. Also, as used herein, the terms “has, ” “have, ” “having, ” “comprise, ” “comprising, ” “include” and “including, ” and derivatives thereof or similar terms are intended to be open-ended terms that do not limit an element that they modify (for example, an element “having” A may also have B) . Also, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or, ” unless explicitly stated otherwise (for example, if used in combination with “either” or “only one of” ) . As used herein, a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members. As an example, “at least one of: a, b, or c” is intended to cover a, b, c, a + b, a + c, b + c, and a + b + c, as well as any combination with multiples of the same element (for example, a + a, a + a + a, a + a + b, a + a + c, a + b + b, a + c + c, b + b, b + b + b, b + b + c, c + c, and c + c + c, or any other ordering of a, b, and c) .
[0220] As used herein, the term “determine” or “determining” encompasses a wide variety of actions and, therefore, “determining” can include calculating, computing, processing, deriving, estimating, investigating, looking up (such as via looking up in a table, a database, or another data structure) , searching, inferring, ascertaining, and / or measuring, among other possibilities. Also, “determining” can include receiving (such as receiving information) , accessing (such as accessing data stored in memory) or transmitting (such as transmitting information) , among other possibilities. Additionally, “determining” can include resolving, selecting, obtaining, choosing, establishing, and / or other such similar actions.
[0221] As used herein, the phrase “based on” is intended to mean “based at least in part on” or “based on or otherwise in association with” unless explicitly stated otherwise. As used herein, “satisfying a threshold” may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold, among other examples.
[0222] Even though particular combinations of features are recited in the claims or disclosed in the specification, these combinations are not intended to limit the scope of all aspects described herein. Many of these features may be combined in ways not specifically recited in the claims or disclosed in the specification. The disclosure of various aspects includes each dependent claim in combination with every other claim in the claim set.
Claims
1.A user equipment (UE) for wireless communication, comprising:one or more memories; andone or more processors, coupled to the one or more memories, configured to cause the UE to:receive a discovery signal indicating a synchronization signal block (SSB) burst periodicity of a plurality of SSB burst periodicities; andreceive an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity.2.The UE of claim 1, wherein the discovery signal includes an indicator associated with the SSB burst periodicity.3.The UE of claim 2, wherein the discovery signal comprises a primary synchronization signal (PSS) .4.The UE of claim 3, wherein the indicator comprises a single bit, wherein the single bit is set to a first value to indicate the SSB burst periodicity, and wherein the single bit is set to a second value to indicate another SSB burst periodicity of the plurality of SSB burst periodicities.5.The UE of claim 4, wherein the SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in an idle state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in a connected state.6.The UE of claim 4, wherein the SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in a connected state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in an idle state.7.The UE of claim 1, wherein the UE is configured to receive one or more of a first discovery signal associated with a first sequence or a second discovery signal associated with a second sequence that is different from the first sequence, wherein the SSB burst periodicity corresponds to a first SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal, wherein the SSB burst periodicity corresponds to a second SSB burst periodicity based at least in part on the discovery signal comprising the second discovery signal, and wherein the SSB burst periodicity corresponds to a third SSB burst periodicity based at least in part on the discovery signal comprising the first discovery signal and the second discovery signal.8.The UE of claim 1, wherein the discovery signal is periodically transmitted, and wherein the discovery signal is received with combining based at least in part on the discovery signal being periodically transmitted.9.The UE of claim 1, wherein the discovery signal comprises a first discovery signal, and wherein receiving the discovery signal comprises:periodically receive the first discovery signal and a second discovery signal, wherein the SSB burst periodicity is determined based at least in part on a sequence in which the first discovery signal and the second discovery signal are periodically received.10.The UE of claim 1, wherein the SSB is transmitted in accordance with a non-uniform pattern, and wherein the SSB is received based at least in part on searching for multiple combinable SSBs during a second time period corresponding to a sliding window.11.The UE of claim 10, wherein the time period corresponding to the sliding window is associated with a maximum search duration within which the sliding window moves.12.The UE of claim 11, wherein the maximum search duration corresponds to a sum of a value corresponding to a periodicity associated with the non-uniform pattern and a duration of the non-uniform pattern.13.The UE of claim 1, wherein the SSB is received with combining based at least in part on monitoring the communication channel for a plurality of first time periods.14.A network node for wireless communication, comprising:one or more memories; andone or more processors, coupled to the one or more memories, configured to cause the network node to:transmit a discovery signal indicating a synchronization signal block (SSB) burst periodicity of a plurality of SSB burst periodicities; andperiodically transmit an SSB burst in accordance with the SSB burst periodicity.15.The network node of claim 14, wherein the discovery signal includes an indicator associated with the SSB burst periodicity.16.The network node of claim 15, wherein the discovery signal comprises a primary synchronization signal (PSS) .17.The network node of claim 15, wherein the indicator comprises a single bit, wherein the single bit is set to a first value to indicate the SSB burst periodicity, and wherein the single bit is set to a second value to indicate another SSB burst periodicity of the plurality of SSB burst periodicities.18.The network node of claim 17, wherein the SSB burst periodicity is associated with transmitting the SSB to a user equipment (UE) when the UE is in an idle state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in a connected state.19.The network node of claim 17, wherein the SSB burst periodicity is associated with transmitting the SSB to a user equipment (UE) when the UE is in a connected state, and the other SSB burst periodicity is associated with transmitting the SSB to the UE when the UE is in an idle state.20.A method of wireless communication performed by a user equipment (UE) , comprising:receiving a discovery signal indicating a synchronization signal block (SSB) burst periodicity of a plurality of SSB burst periodicities; andreceiving an SSB based at least in part on monitoring a communication channel for a first time period, wherein the first time period corresponds to the SSB burst periodicity.