Multiple synchronization signal block periodicity in time period

Abstract

Aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment (UE) may receive an indication of a synchronization signal block (SSB) configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. The UE may receive a plurality of SSBs during the time period, the plurality of SSBs being received at a first SSB periodicity during the first portion of the time period, and at a second SSB periodicity during the second portion of the time period. Numerous other aspects are described.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to Israel Patent Application No. 292936, filed on May 10, 2022, entitled “MULTIPLE SYNCHRONIZATION SIGNAL BLOCK PERIODICITIES IN A TIME CYCLE”. The disclosure of the prior application is considered a part of this patent application and is incorporated by reference into this patent application. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for multiple synchronization signal block periodicity in a time period. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0005] A wireless network may include one or more base stations that support communications for a user equipment (UE) or multiple UEs. A UE may communicate with a base station via downlink communications and uplink communications. A "downlink" (or "DL") refers to the communication link from a base station to a UE, and an "uplink" (or "UL") refers to the communication link from a UE to a base station.

[0006] The above-mentioned multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different UEs to communicate at a city, country, region and / or global level. New Radio (NR) (which may be referred to as 5G) is a set of enhancements to the LTE mobile standard promulgated by 3GPP. NR is designed to better support mobile broadband Internet access by: improving spectrum efficiency; reducing costs; improving services; utilizing new spectrum; and using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink, CP-OFDM and / or single carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink to better integrate with other open standards; and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation. As the demand for mobile broadband access continues to increase, further improvements in LTE, NR and other radio access technologies remain useful. Summary of the invention

[0007] Some aspects described herein relate to a method of wireless communication performed by a user equipment (UE). The method may include receiving an indication of a synchronization signal block (SSB) configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. The method may include receiving a plurality of SSBs during the time period, the plurality of SSBs being received with the first SSB periodicity during the first portion of the time period and being received with the second SSB periodicity during the second portion of the time period.

[0008] Some aspects described herein relate to a method of wireless communication performed by a network node. The method may include sending an indication of an SSB configuration for a time period, the configuration indicating a first synchronization signal block (SSB) periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. The method may include sending a plurality of SSBs during the time period, the plurality of SSBs being sent with a first SSB periodicity during the first portion of the time period and being sent with a second SSB periodicity during the second portion of the time period.

[0009] Some aspects described herein relate to a UE for wireless communication. The user equipment may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to receive an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. The one or more processors may be configured to receive a plurality of SSBs during the time period, the plurality of SSBs being received with a first SSB periodicity during the first portion of the time period and being received with a second SSB periodicity during the second portion of the time period.

[0010] Some aspects described herein relate to a network node for wireless communications. The network node may include a memory and one or more processors coupled to the memory. The one or more processors may be configured to send an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. The one or more processors may be configured to send a plurality of SSBs during the time period, the plurality of SSBs being sent with a first SSB periodicity during the first portion of the time period and being sent with a second SSB periodicity during the second portion of the time period.

[0011] Some aspects described herein relate to a non-transitory computer-readable medium storing an instruction set for wireless communication by a UE. When executed by one or more processors of the UE, the instruction set may cause the UE to receive an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. When executed by one or more processors of the UE, the instruction set may cause the UE to receive a plurality of SSBs during the time period, the plurality of SSBs being received with a first SSB periodicity during the first portion of the time period and being received with a second SSB periodicity during the second portion of the time period.

[0012] Some aspects described herein relate to a non-transitory computer-readable medium storing an instruction set for wireless communication by a network node. When executed by one or more processors of the network node, the instruction set may cause the network node to send an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. When executed by one or more processors of the network node, the instruction set may cause the network node to send a plurality of SSBs during the time period, the plurality of SSBs being sent with a first SSB periodicity during the first portion of the time period and being sent with a second SSB periodicity during the second portion of the time period.

[0013] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for receiving an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. The apparatus may include means for receiving a plurality of SSBs during the time period, the plurality of SSBs being received at the first SSB periodicity during the first portion of the time period and being received at the second SSB periodicity during the second portion of the time period.

[0014] Some aspects described herein relate to an apparatus for wireless communication. The apparatus may include means for sending an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. The apparatus may include means for sending a plurality of SSBs during the time period, the plurality of SSBs being sent with the first SSB periodicity during the first portion of the time period and being sent with the second SSB periodicity during the second portion of the time period.

[0015] The various aspects generally include methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices and / or processing systems as fully described herein with reference to the drawings and description and as illustrated in the drawings and description.

[0016] The features and technical advantages of examples according to the present disclosure have been outlined quite extensively above so that the following specific embodiments may be better understood. Additional features and advantages will be described below. The disclosed concepts and specific examples may be easily used as a basis for modifying or designing other structures for achieving the same purpose of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description and not as a definition of limitations to the claims.

[0017] Although various aspects are described in the present disclosure by illustrating some examples, it will be understood by those skilled in the art that such aspects can be implemented in many different arrangements and scenarios. The technology described herein can be implemented using different platform types, devices, systems, shapes, sizes and / or packaging arrangements. For example, some aspects can be implemented via integrated chip implementations or other devices based on non-module components (e.g., end-user devices, vehicles, communication equipment, computing equipment, industrial equipment, retail / shopping equipment, medical equipment and / or artificial intelligence devices). Various aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components and / or system-level components. The equipment incorporating the various aspects and features described may include additional components and features for implementing and practicing the various aspects claimed and described. For example, the transmission and reception of wireless signals may include one or more components for analog and digital purposes (e.g., hardware components, including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders and / or summers). The various aspects described herein are intended to be practiced in various devices, components, systems, distributed arrangements and / or end-user devices of various sizes, shapes and configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to be able to understand the above-mentioned features of the present disclosure in detail, a more specific description briefly summarized above may be obtained by reference to various aspects (some of which are illustrated in the accompanying drawings). However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and are therefore not to be considered as limiting the scope thereof, as the specification may admit of other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 is a diagram illustrating an example of a wireless network according to the present disclosure.

[0020] Figure 2 is a diagram illustrating an example of a base station communicating with a user equipment (UE) in a wireless network according to the present disclosure.

[0021] Figure 3 is a diagram illustrating an example decomposed base station architecture according to the present disclosure.

[0022] Figure 4A and Figure 4B is a diagram illustrating an example of synchronization signal block (SSB) broadcasting according to the present disclosure.

[0023] Figures 5 to 7 is a diagram illustrating an example associated with using multiple synchronization signal block periodicities in a time period according to the present disclosure.

[0024] Figure 8 and Fig. 9 is a diagram illustrating an example process associated with using multiple synchronization signal block periodicities in a time period according to the present disclosure.

[0025] Fig.10 and Fig.11 is a diagram of an example apparatus for wireless communications according to the present disclosure. DETAILED DESCRIPTION

[0026] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms, and should not be construed as being limited to any specific structure or function presented throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the protection scope of the present disclosure will be fully conveyed to those skilled in the art. It should be understood by those skilled in the art that the scope of the present disclosure is intended to cover any aspect of the disclosure disclosed herein, whether it is implemented independently or in combination with any other aspect of the disclosure. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods implemented using other structures, functionality, or structures and functionality in addition to or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims.

[0027] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0028] Although various aspects may be described herein using terms generally associated with 5G or new radio (NR) radio access technology (RAT), various aspects of the present disclosure may be applicable to other RATs, such as 3G RAT, 4G RAT and / or 5G and beyond (e.g., 6G) RATs.

[0029] Figure 1 1 is a diagram illustrating an example of a wireless network 100 according to the present disclosure. The wireless network 100 may be a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, or may include elements of a 5G (e.g., NR) network and / or a 4G (e.g., Long Term Evolution (LTE)) network, etc. The wireless network 100 may include one or more base stations 110 (shown as BS110a, BS110b, BS110c, and BS110d), a user equipment (UE) 120 or a plurality of UEs 120 (shown as UE 120a, UE120b, UE 120c, UE 120d, and UE 120e), and / or other network entities. The base station 110 is an entity that communicates with the UE 120. The base station 110 (sometimes referred to as a BS) may include, for example, an NR base station, an LTE base station, a Node B, an eNB (e.g., in 4G), a gNB (e.g., in 5G), an access point, and / or a transmit receive point (TRP). Each base station 110 may provide communication coverage for a particular geographic area. In the Third Generation Partnership Project (3GPP), the term "cell" may refer to the coverage area of ​​a base station 110 and / or a base station subsystem serving the coverage area, depending on the context in which the term is used.

[0030] Base station 110 may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UE 120 with a service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UE 120 with a service subscription. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UE 120 associated with the femto cell (e.g., UE 120 in a closed subscriber group (CSG)). A base station 110 for a macro cell may be referred to as a macro base station. A base station 110 for a pico cell may be referred to as a pico base station. A base station 110 for a femto cell may be referred to as a femto base station or a home base station. In Figure 1 In the example shown, BS 110a may be a macro base station for macrocell 102a, BS 110b may be a pico base station for picocell 102b, and BS 110c may be a femto base station for femtocell 102c. A base station may support one or more (eg, three) cells.

[0031] In some examples, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile base station 110 (e.g., a mobile base station). In some examples, the base stations 110 may be interconnected with each other and / or to one or more other base stations 110 or network nodes (not shown) in the wireless network 100 using any suitable transport network through various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0032] The wireless network 100 may include one or more relay stations. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a base station 110 or a UE 120) and transmit transmissions of data to a downstream station (e.g., a UE 120 or a base station 110). A relay station may be a UE 120 that is capable of relaying transmissions for other UEs 120. Figure 1 In the example shown, BS 110d (eg, a relay base station) may communicate with BS 110a (eg, a macro base station) and UE 120d to facilitate communication between BS 110a and UE 120d. A base station 110 that relays communications may be referred to as a relay station, relay base station, relay, or the like.

[0033] The wireless network 100 may be a heterogeneous network including different types of base stations 110, such as macro base stations, pico base stations, femto base stations, relay base stations, etc. These different types of base stations 110 may have different transmit power levels, different coverage areas, and / or different impacts on interference in the wireless network 100. For example, a macro base station may have a high transmit power level (e.g., 5 watts to 40 watts), while a pico base station, a femto base station, and a relay base station may have a lower transmit power level (e.g., 0.1 watt to 2 watts).

[0034] A network controller 130 may be coupled to or in communication with a set of base stations 110 and may provide coordination and control for the base stations 110. The network controller 130 may communicate with the base stations 110 via backhaul communication links. The base stations 110 may also communicate directly with each other or indirectly via wireless or wired backhaul communication links.

[0035] UE 120 may be dispersed throughout the wireless network 100, and each UE 120 may be stationary or mobile. UE 120 may include, for example, an access terminal, a terminal, a mobile station, and / or a subscriber unit. UE 120 may be a cellular phone (e.g., 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 computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device, a biometric device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring or a smart bracelet)), an entertainment device (e.g., a music device, a video device, and / or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, and / or any other suitable device configured to communicate via a wireless medium.

[0036] Some UEs 120 may be considered as machine type communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC UEs and / or eMTC UEs may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that may communicate with a base station, another device (e.g., a remote device), or some other entity. Some UEs 120 may be considered as Internet of Things (IoT) devices and / or may be implemented as NB-IoT (narrowband IoT) devices. Some UEs 120 may be considered as customer premises equipment. UE 120 may be included inside a housing that houses components of UE 120, such as a processor component and / or a memory component. In some examples, the processor component and the memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operably coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0037] In general, any number of wireless networks 100 may be deployed in a given geographic area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. RAT may be referred to as a radio technology, air interface, etc. Frequency may be referred to as a carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0038] In some examples, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more side link channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols), and / or mesh networks. In such examples, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0039] The devices of the wireless network 100 may communicate using an electromagnetic spectrum, which may be subdivided into various categories, bands, channels, etc., according to frequency or wavelength. For example, the devices of the wireless network 100 may communicate using one or more operating bands. In 5G NR, two initial operating bands have been identified as frequency ranges designated FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). It should be understood that although portions of FR1 are greater than 6 GHz, FR1 is often (interchangeably) referred to as the "below 6 GHz" band in various documents and articles. A similar naming problem sometimes occurs with respect to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0040] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has identified the operating bands for these mid-band frequencies as frequency range designation FR3 (7.125GHz-24.25GHz). The bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and therefore the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operations to more than 52.6GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6GHz-71GHz), FR4 (52.6GHz-114.25GHz) and FR5 (114.25GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

[0041] Considering the above examples, unless otherwise specifically stated, it should be understood that if the term "below 6 GHz" or the like is used herein, the term may broadly refer to frequencies that may be lower than 6 GHz, may be within FR1, or may include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that if the term "millimeter wave" or the like is used herein, the term may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or may be within the EHF band. It is contemplated that the frequencies included in these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0042] In some aspects, UE 120 may include communication manager 140. As described in greater detail elsewhere herein, communication manager 140 may receive an indication of a configuration of SSBs for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period; and receive a plurality of SSBs during the time period, the plurality of SSBs being received with the first SSB periodicity during the first portion of the time period and being received with the second SSB periodicity during the second portion of the time period. Additionally or alternatively, communication manager 140 may perform one or more other operations described herein.

[0043] In some aspects, the network node may include a communication manager 150. As described in more detail elsewhere herein, the communication manager 150 may send an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period; and send a plurality of SSBs during the time period, the plurality of SSBs being sent with the first SSB periodicity during the first portion of the time period and being sent with the second SSB periodicity during the second portion of the time period. Additionally or alternatively, the communication manager 150 may perform one or more other operations described herein.

[0044] In some aspects, the term "base station" (e.g., base station 110) or "network node" or "network entity" may refer to a converged base station, a decomposed base station (e.g., a combined Fig. 9110), an integrated access and backhaul (IAB) node, a relay node, and / or one or more components thereof. For example, in some aspects, a "base station", "network node", or "network entity" may refer to a central unit (CU), a distributed unit (DU), a radio unit (RU), a near real-time (near RT) RAN intelligent controller (RIC), or a non-real-time (non-RT) RIC, or a combination thereof. In some aspects, the term "base station", "network node", or "network entity" may refer to a device configured to perform one or more functions (such as those described herein in conjunction with base station 110). In some aspects, the term "base station", "network node", or "network entity" may refer to a plurality of devices configured to perform one or more functions. For example, in some distributed systems, each of a plurality of different devices (which may be located in the same geographic location or in different geographic locations) may be configured to perform at least a portion of a function, or to repeat the execution of at least a portion of the function, and the term "base station", "network node", or "network entity" may refer to any one or more of these different devices. In some aspects, the term "base station", "network node", or "network entity" may refer to one or more virtual base stations and / or one or more virtual base station functions. For example, in some aspects, two or more base station functions may be instantiated on a single device. In some aspects, the terms "base station," "network node," or "network entity" may refer to one of the base station functions but not another. In this way, a single device may include more than one base station.

[0045] As indicated above, Figure 1 are provided as examples. Other examples can be found in the Figure 1 Different from what is described.

[0046] Figure 2 2 is a diagram illustrating an example 200 of base station 110 communicating with UE 120 in wireless network 100 according to the present disclosure. Base station 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≥1). UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≥1).

[0047] At the base station 110, the transmit processor 220 may receive data intended for the UE 120 (or a set of UEs 120) from the data source 212. The transmit processor 220 may select one or more modulation and coding schemes (MCS) for the UE 120 based at least in part on one or more channel quality indicators (CQI) received from the UE 120. The base station 110 may process (e.g., encode and modulate) the data for the UE 120 based at least in part on the MCS selected for the UE 120, and provide data symbols for the UE 120. The transmit processor 220 may process system information (e.g., for semi-static resource allocation information (SRPI)) and control information (e.g., CQI requests, grants, and / or upper layer signaling), and provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., pre-coding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide a set of output symbol streams (e.g., T output symbol streams) to a corresponding set of modems 232 (e.g., T modems) (shown as modems 232a to 232t). For example, each output symbol stream may be provided to a modulator component (shown as MOD) of the modem 232. Each modem 232 may process a corresponding output symbol stream (e.g., for OFDM) using a corresponding modulator component to obtain an output sample stream. Each modem 232 may also process (e.g., convert to analog, amplify, filter, and / or up-convert) the output sample stream using a corresponding modulator component to obtain a downlink signal. The modems 232a to 232t may transmit a set of downlink signals (e.g., T downlink signals) via a corresponding set of antennas 234 (e.g., T antennas) (shown as antennas 234a to 234t).

[0048] At the UE 120, a set of antennas 252 (shown as antennas 252a to 252r) may receive downlink signals from the base station 110 and / or other base stations 110, and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) (shown as modems 254a to 254r). For example, each received signal may be provided to a demodulator component (shown as DEMOD) of the modem 254. Each modem 254 may use a corresponding demodulator component to condition (e.g., filter, amplify, downconvert, and / or digitize) the received signal to obtain input samples. Each modem 254 may use a demodulator component to further process the input samples (e.g., for OFDM) to obtain received symbols. A MIMO detector 256 may obtain received symbols from the modem 254, may perform MIMO detection on the received symbols where applicable, and may provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, may provide decoded data for the UE 120 to the data sink 260, and may provide decoded control information and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may determine a reference signal received power (RSRP) parameter, a received signal strength indicator (RSSI) parameter, a reference signal received quality (RSRQ) parameter, and / or a CQI parameter, among other things. In some examples, one or more components of the UE 120 may be included in the housing 284.

[0049] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0050] One or more antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included within one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays, etc. Antenna panels, antenna groups, sets of antenna elements, and / or antenna arrays may include one or more antenna elements (in a single housing or multiple housings), sets of coplanar antenna elements, sets of non-coplanar antenna elements, and / or may be coupled to one or more transmit and / or receive components (such as, Figure 2 One or more antenna elements of one or more components in.

[0051] On the uplink, at the UE 120, the transmit processor 264 may receive and process data from the data source 262 and control information from the controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be pre-decoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the base station 110. In some examples, the modem 254 of the UE 120 may include a modulator and a demodulator. In some examples, the UE 120 includes a transceiver. The transceiver may include any combination of an antenna 252, a modem 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform the functions described herein (eg, with reference to Figures 5 to 11 ) any aspects of any of the methods described herein.

[0052] At the base station 110, uplink signals from the UE 120 and / or other UEs may be received by the antenna 234, processed by the modem 232 (e.g., a demodulator component of the modem 232 shown as DEMOD), detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and may communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule one or more UEs 120 for downlink and / or uplink communications. In some examples, the modem 232 of the base station 110 may include a modulator and a demodulator. In some examples, the base station 110 includes a transceiver. The transceiver may include any combination of antenna 234, modem 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform operations described herein (e.g., with reference to Figures 5 to 11 ) any aspects of any of the methods described herein.

[0053] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120 and / or Figure 2Any other components of the network node may perform one or more techniques associated with using multiple synchronization signal blocks periodically in a time period, as described in more detail elsewhere herein. In some aspects, the network node described herein is Figure 2 The base station 110 is shown, is included in the base station 110, or includes one or more components of the base station 110. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component in may perform or direct e.g. Figure 8 The process of 800 Fig. 9 900 and / or operations of other processes as described herein. Memory 242 and memory 282 may store data and program codes for base station 110 and UE 120, respectively. In some examples, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, conversion, and / or interpretation), may cause one or more processors, UE 120, and / or base station 110 to perform or direct, for example Figure 8 The process of 800 Fig. 9 The process 900 and / or operations of other processes as described herein. In some examples, executing instructions may include running instructions, converting instructions, compiling instructions, and / or interpreting instructions, etc.

[0054] In some aspects, the UE includes: means for receiving an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period; and / or means for receiving a plurality of SSBs during the time period, the plurality of SSBs being received with the first SSB periodicity during the first portion of the time period and being received with the second SSB periodicity during the second portion of the time period. Means for the UE to perform operations described herein may include, for example, one or more of the following: communications manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller / processor 280, or memory 282.

[0055] In some aspects, the network node includes means for sending an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period; and / or means for sending a plurality of SSBs during the time period, the plurality of SSBs being sent with a first SSB periodicity during the first portion of the time period and being sent with a second SSB periodicity during the second portion of the time period. In some aspects, the means for the network node to perform operations described herein may include, for example, one or more of the communications manager 150, the transmit processor 220, the TX MIMO processor 230, the modem 232, the antenna 234, the MIMO detector 236, the receive processor 238, the controller / processor 240, the memory 242, or the scheduler 246.

[0056] Although Figure 2 The blocks in the 2000 and 2010 are illustrated as distinct components, but the functionality described above for these blocks may be implemented in a single hardware, software, or combined component or in various combinations of components. For example, the functionality described for the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0057] As indicated above, Figure 2 are provided as examples. Other examples can be found in the Figure 2 Different from what is described.

[0058] Figure 3 is a diagram illustrating an example 300 decomposed base station architecture according to the present disclosure.

[0059] The deployment of a communication system (such as a 5G NR system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a RAN node, a core network node, a network element or a network equipment (such as a base station (BS, e.g., base station 110) or one or more units (or one or more components) performing base station functions can be implemented in an aggregated or decomposed architecture. For example, a BS (such as a Node B (NB), an eNB, an NR BS, a 5GNB, an access node (AP), a TRP, a cell, etc.) can be implemented as an aggregated base station (also called a stand-alone BS or a monolithic BS) or a decomposed base station.

[0060] A converged base station may be configured to utilize a radio protocol stack physically or logically integrated within a single RAN node. A decomposed base station may be configured to utilize a protocol stack physically or logically distributed between two or more units, such as one or more central or centralized units (CUs), one or more distributed units (DUs), or one or more radio units (RUs). In some aspects, a CU may be implemented within a RAN node, and one or more DUs may be co-located with the CU, or alternatively, may be geographically or virtually distributed in one or more other RAN nodes. A DU may be implemented to communicate with one or more RUs. Each of a CU, a DU, and a RU may also be implemented as a virtual unit, i.e., a virtual centralized unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0061] Base station type operations or network designs may take into account the aggregated nature of base station functionality. For example, a disaggregated base station may be used in an IAB network, an O-RAN (such as a network configuration sponsored by the O-RAN Alliance), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. Individual units of a disaggregated base station or disaggregated RAN architecture may be configured for wired or wireless communication with at least one other unit.

[0062] Figure 3 The decomposed base station architecture shown may include one or more CUs 310 that may communicate directly with a core network 320 via a backhaul link, or indirectly with a core network 320 through one or more decomposed base station units, such as a near real-time (near RT) RIC 325 via an E2 link, or a non-real-time (non-RT) RIC 315 associated with a service management and orchestration (SMO) framework 305, or both. The CU 310 may communicate with one or more DUs 330 via respective midhaul links, such as an F1 interface. The DU 330 may communicate with one or more RUs 340 via respective fronthaul links. The RU 340 may communicate with respective UEs 120 via one or more radio frequency (RF) access links. In some implementations, a UE 120 may be served simultaneously by multiple RUs 340.

[0063] Each of these units (e.g., CU 310, DU 330, RU 340), as well as near-RT RIC 325, non-RTRIC 315, and SMO framework 305 may include one or more interfaces, or be coupled to one or more interfaces configured to receive or send signals, data, or information (collectively referred to as signals) via a wired or wireless transmission medium. Each of these units or an associated processor or controller that provides instructions to the communication interface of these units may be configured to communicate with one or more of the other units via a transmission medium. For example, these units may include a wired interface that is configured to receive or send signals to one or more of the other units via a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, a transmitter, or a transceiver (such as an RF transceiver) that is configured to receive or send signals, or both, to one or more of the other units on a wireless transmission medium.

[0064] In some aspects, CU 310 may host one or more higher layer control functions. Such control functions may include radio resource control (RRC), packet data convergence protocol (PDCP), service data adaptation protocol (SDAP), etc. Each control function may be implemented as having an interface configured to communicate signals with other control functions hosted by CU 310. CU310 may be configured to handle user plane functions (e.g., central unit-user plane (CU-UP)), control plane functions (e.g., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 310 may be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 310 may be implemented to communicate with DU 330 for network control and signaling.

[0065] DU 330 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RU 340. In some aspects, DU 330 may host one or more of a radio link control (RLC) layer, a medium access control (MAC) layer, and one or more high physical (PHY) layers (such as modules for forward error correction (FEC) encoding and decoding, scrambling, modulation and demodulation, etc.) depending at least in part on a functional split such as defined by 3GPP. In some aspects, DU 330 may further host one or more low PHY layers. Each layer (or module) may be implemented with an interface that is configured to communicate signals with other layers (and modules) hosted by DU 330 or with control functions hosted by CU 310.

[0066] Lower layer functionality may be implemented by one or more RUs 340. In some deployments, a RU 340 controlled by a DU 330 may correspond to a logical node that hosts RF processing functions or low PHY layer functions (such as performing Fast Fourier Transform (FFT), Inverse FFT (iFFT), digital beamforming, physical random access channel (PRACH) extraction and filtering, etc.), or both, based at least in part on a functional split (such as a lower layer functional split). In such an architecture, the RU 340 may be implemented to handle over-the-air (OTA) communications with one or more UEs 120. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 340 may be controlled by the corresponding DU 330. In some scenarios, this configuration may enable the implementation of the DU 330 and the CU 310 in a cloud-based RAN architecture (such as a vRAN architecture).

[0067] The SMO framework 305 may be configured to support RAN deployment and configuration of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which may be managed via an operation and maintenance interface (such as an O1 interface). For virtualized network elements, the SMO framework 305 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 335) to perform network element lifecycle management (such as instantiating virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 310, DU 330, RU 340, and near-RT RIC 325. In some specific implementations, the SMO framework 305 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 311) via the O1 interface. Additionally, in some specific implementations, the SMO framework 305 may communicate directly with one or more RUs 340 via the O1 interface. The SMO framework 305 may also include a non-RT RIC 315 configured to support the functionality of the SMO framework 305 .

[0068] The non-RT RIC 315 may be configured to include logic functions that enable non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or policy-based guidance of applications / features in the near-RT RIC 325. The non-RT RIC 315 may be coupled to or in communication with the near-RT RIC 325 (such as via an A1 interface). The near-RT RIC 325 may be configured to include logic functions that enable near-real-time control and optimization of RAN elements and resources via data collection and actions through an interface (such as via an E2 interface) that connects one or more CUs 310, one or more DUs 330, or both, and the O-eNB with the near-RT RIC 325.

[0069] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 325, the non-RT RIC 315 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 325 and may be received from a non-network data source or from a network function at the SMO framework 305 or the non-RT RIC 315. In some examples, the non-RT RIC 315 or the near-RT RIC 325 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 315 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 305 (such as via reconfiguration of O1) or via creation of RAN management policies (such as A1 policies).

[0070] As indicated above, Figure 3 are provided as examples. Other examples can be found in the Figure 3 Different from what is described.

[0071] Figure 4A and Figure 4B 400 and 450 are diagrams illustrating examples of SSB broadcasting according to the present disclosure. In some networks, a network node may be configured to provide a cell of the network (e.g., provide a connection to the network for a device within the cell). A network node may be configured to provide SSB to support connections within a cell. For example, a network node may provide SSB to support acquisition of a cell (e.g., initial acquisition), synchronization (e.g., frequency synchronization and / or time synchronization, among other examples), and / or beam management, among other examples.

[0072] like Figure 4A In the example and as indicated by reference numeral 405, a network node may broadcast SSBs within a cell. SSBs may have a relatively high periodicity to save network resources (eg, overhead). For example, SSBs may have a periodicity of 40 milliseconds or longer.

[0073] As indicated by reference numeral 410, the first UE can receive the SSB with sufficient periodicity to maintain connection with the cell. For example, the SSB may have a periodicity that supports frequency synchronization, time synchronization, and / or beam management of the first UE. The periodicity of the SSB may be sufficient based at least in part on the UE having a signal-to-noise ratio (SNR) and / or a signal-to-interference-plus-noise ratio (SINR) that satisfies a threshold.

[0074] As indicated by reference numeral 415, the second UE may receive the SSB with a periodicity insufficient to maintain a connection with the cell. For example, the SSB may not have a periodicity that supports frequency synchronization, time synchronization, and / or beam management of the second UE. The periodicity of the SSB may be insufficient based at least in part on the UE having an SNR and / or SINR that fails to meet a threshold.

[0075] Similarly, as shown by reference numeral 420, the third UE may be able to receive SSBs with sufficient periodicity to maintain a connection with the cell. As shown by reference numeral 425, the fourth UE may receive SSBs with insufficient periodicity to maintain a connection with the cell.

[0076] In example 400, the periodicity of SSB may prioritize spectral efficiency (e.g., reducing overhead) over supporting connections for UEs at the cell edge. In this case, network, communication, power, and / or computing resources are unnecessarily consumed attempting to reestablish connections with UEs at the cell edge.

[0077] like Figure 4B In the example and indicated by reference numeral 455, the network node may broadcast SSBs within the cell. The SSBs may have a relatively low periodicity (e.g., Figure 4A ) to support UEs at the cell edge to maintain connection to the cell. However, for UEs with signal strength (e.g., SNR or SINR) that meet a threshold, this periodicity may unnecessarily consume network resources (e.g., generate unnecessary overhead). For example, SSB may have a periodicity of 40 milliseconds or less.

[0078] As indicated by reference numeral 460, the first UE may be able to receive the SSBs with sufficient periodicity to maintain connection with the cell, but with unnecessary overhead. For example, the SSBs may have a periodicity longer than necessary to support frequency synchronization, time synchronization, and / or beam management of the first UE. The periodicity of the SSBs may be more than sufficient based at least in part on the UE having an SNR and / or SINR that satisfies a threshold.

[0079] As indicated by reference numeral 465, the second UE can receive the SSB with sufficient periodicity to maintain connection with the cell (e.g., without unnecessary overhead). For example, the SSB may have a periodicity that supports frequency synchronization, time synchronization, and / or beam management of the second UE. The periodicity of the SSB may be sufficient based at least in part on the UE having an SNR and / or SINR that satisfies a threshold and / or based at least in part on the periodicity being configured for UEs at a cell edge.

[0080] Similarly, as shown by reference numeral 470, the third UE can receive SSBs with sufficient periodicity to maintain connection with the cell, but with unnecessary overhead. As shown by reference numeral 475, the fourth UE can receive SSBs with sufficient periodicity to maintain connection with the cell.

[0081] In example 450, the periodicity of the SSB may prioritize supporting connections for UEs at the cell edge over spectral efficiency. In this case, network, communication, power, and / or computing resources are unnecessarily consumed to support connections at the cell edge.

[0082] As indicated above, Figure 4A and Figure 4B Other examples can be found in the Figure 4A and Figure 4B Different from what is described.

[0083] In some networks, such as high frequency networks (e.g., sub-terahertz (SubThz) frequency networks, among other examples), initial acquisition and initial synchronization loop convergence as well as steady-state synchronization loop tracking (e.g., compared to other frequency bands) may require a relatively low SSB periodicity (e.g., relatively high density). This may be based at least in part on increased sensitivity of SubThz to timing drift and / or parts per million (ppm) errors (e.g., due to lower parameter sets) and / or on the other hand on reduced accuracy of frequency offset (FO) / ppm error estimates (based at least in part on shorter observation times for FO estimates of a single SSB, and increased phase noise-related variance of FO / ppm error estimates). Correspondingly, a lower SSB periodicity may be required to allow the required loop update rate in order to achieve initial convergence and the desired level of residual frequency and timing errors at the loop output to reach steady state. This may be particularly challenging during initial convergence at the lowest edge of the target SNR range.

[0084] Additionally or alternatively, non-coherent combining of SSB detection peaks across several SSBs may be required for initial acquisition (InitAcq) to support adequate coverage characteristics (e.g., detection at the lowest target negative SNR). In addition, due to the sensitivity and uncertainty associated with timing drift, the time gap (SSB period) between consecutive SSBs used to detect peak combinations should be smaller (e.g., compared to other bands).

[0085] During connected mode, frequency and / or time synchronization may be maintained based at least in part on SSBs and / or other reference signals (RSs), such as tracking reference signals (TRSs), phase tracking reference signals (PT-RSs), and / or DMRSs. Based at least in part on replacing other RSs to maintain frequency and / or time synchronization, SSB periodicity during this time may be less important. For connected UEs with SNRs that meet a threshold, the synchronization loop update rate may be lower, and thus different connected UEs may require different synchronization RS rates depending on their SNRs.

[0086] Because SSB is a broadcast signal, SSB can be configured to target supporting UEs (e.g., cell-edge UEs) under worst-case conditions, and a corresponding minimum SSB periodicity should be adopted to ensure that these cell-edge UEs located at the edge of the target cell can be served.

[0087] However, for UEs that are experiencing relatively high SNRs (e.g., SNRs that meet a threshold) or UEs that are already in a synchronization condition and / or stable state (e.g., after InitAcq and initial convergence of the synchronization loop), a higher SSB periodicity may be sufficient to maintain the synchronization loop. This may be applicable to SubThz systems, where the primary sensitivity to synchronization may be based at least in part on time synchronization due to higher parameter sets and shorter cyclic prefix durations. For the latter category of UEs (e.g., UEs with SNRs above a threshold or UEs that are already in a synchronization condition), the residual ppm error and the corresponding time drift are limited, so that the tolerable time gap between consecutive occurrences of the same SSB may be higher while still supporting synchronization and / or maintaining connection to the cell.

[0088] In some aspects described herein, a time period associated with an SSB may be configured with two parts: a first part with SSBs at a first SSB periodicity and a second part with SSBs at a second SSB periodicity. The first SSB periodicity may be configured to support maintaining a connection to a cell for a UE with an SNR that meets a threshold. However, for a UE with an SNR that fails to meet the threshold, the network node may send an additional RS that supplements the SSB in the first part. For example, a network node may send a UE-specific TRS to a UE that reports or otherwise indicates an SNR that fails to meet a threshold. In this way, for a UE with an SNR that fails to meet a threshold, the combined periodicity of the SSB and RS may be sufficient to maintain a connection to the cell. In some aspects, the second periodicity may be configured to support, for example, acquisition of a cell by a UE at a cell edge (e.g., a cell edge). In this way, a UE in a cell may use the SSBs sent in the second part of the time period to acquire the cell, and once connected, the UE may use the SSBs and / or additional RSs to maintain a connection to the cell during the first part of the time period.

[0089] Based at least in part on using SSBs with variable periodicity (e.g., where a time period has a first SSB periodicity in a first portion and a second SSB periodicity in a second portion), the network node may reduce overhead typically used to send SSBs during the first portion and may increase overhead for specific UEs when it is necessary to maintain a connection to the cell.

[0090] In general, the use of variable SSB periodicity coupled to complementary and adaptively allocated UE-specific TRSs may support reduced but still efficient synchronization pilot overhead (e.g., associated with SSBs and TRSs) in the network. Additionally or alternatively, variable periodicity SSBs with complementary UE-specific TRSs of variable periodicity may support additional reductions in synchronization RS overhead (e.g., in addition to that achievable with UE-specific TRSs having constant periodicity).

[0091] Minimization of the rate of synchronous RS transmission (e.g., adapted to UE SNR and / or other network conditions) can also support network nodes to reduce power consumption for SubThz applications. For example, reducing power consumption of network nodes can be based at least in part on reducing always-on broadcast transmissions and / or by configuring longer time gaps between broadcast transmissions, which can support an increase in potential sleep period opportunities for network nodes.

[0092] To apply variable SSB periodicity, a time period can be defined. The time period can include a repeating configuration for transmitting SSBs and / or TRSs. The time period is K time slots / T (e.g., in milliseconds (ms)). For X% of the time period, the SSB periodicity is set to N (ms), where N is the periodicity required for InitAcq and initial synchronization loop convergence for cell-edge UEs. X% will be set based on the time window required for InitAcq + beam search and the initial synchronization loop convergence of cell-edge UEs. For the remaining (100 - X)% of the time period, the SSB periodicity is set to M (ms) (e.g., where M = N*C and C is an integer). M is the periodicity required for UEs residing in an SNR condition that meets a threshold (THR) for automatic gain control (AGC) tracking, synchronization loop maintenance, and maintaining beam management.

[0093] For UEs experiencing SNR < THR, the synchronization loop and AGC tracking cannot be maintained at the minimum required accuracy level with SSB periodicity M. Complementary UE-specific TRSs may be required during the (100 - X)% of the time period because the SSB periodicity for these UEs is too high.

[0094] The TRS pattern (e.g., allocation in time and frequency) and the TRS periodicity during the time period (K time slots) can be dynamically adopted, reconfigured, and / or signaled such that the effective combined RS periodicity (SSB + UE-specific TRS) of the tracking loop for a specific UE may not be higher than the minimum effective synchronization RS periodicity required for the target accuracy level of all tracking loops at the SNR experienced by the UE. Correspondingly, during the (100 - X)% of the time period where the SSB periodicity is too high for the UE to maintain the required synchronization level, the adjustable UE-specific TRS periodicity will be equal to or lower than the minimum effective pilot RS period L (ms) required under the SNR condition experienced by the UE (where N ≤ L < M).

[0095] For UEs with SNR < THR, the UE-specific TRS can be active during the (100 - X)% of the time period. This may require dynamically activating / deactivating the UE-specific TRS for different parts of the time period (with a duration of K time slots).

[0096] The TRS pattern (e.g., at least the TRS periodicity) during the TRS active time can be dynamically adopted based on the UE SNR. The variable TRS periodicity per UE and / or per UE SNR can be achieved via dynamic reconfiguration of the UE-specific TRS.

[0097] L may not be equal to N. Assume that a specific UE is not a cell-edge UE, but L may be required to be lower than M (e.g., because the SSB period M is not sufficient for proper synchronization loop tracking of UEs with SNR < THR).

[0098] In some aspects, after InitAcq, a connected UE may receive from the network (e.g., from a network node) all the required information knowing the variable SSB periodicities M and N and the corresponding time boundaries of the serving cell. For example, the UE may receive this information via the Master Information Block (MIB) or the System Information Block (SIB).

[0099] UE-specific TRS may be adaptively and dynamically allocated by the network to complement the SSB of UEs with poor reception conditions, thus meeting the synchronization requirements (e.g., for cell-edge UEs or UEs with SNR < THR, where THR is associated with and / or assumed by the network node for defining the higher SSB periodicity among two alternating SSB periodicities).

[0100] The network may evaluate which UEs should be allocated TRS, the required TRS periodicity per UE according to its SNR (e.g., below a certain maximum time), and / or the time boundaries for transmitting active TRS with a TRS pattern across a time period (K time slots), which may result in a new effective tracking loop pilot periodicity L per UE based on its SNR.

[0101] The UE SNR in the downlink may be reported by the UE or evaluated by the network node based on uplink measurement values or may be estimated (e.g., derived) at least in part based on the operable modulation and coding scheme (MCS) for the downlink. In some aspects, the network node may evaluate the UE SNR in the downlink at least in part based on random access channel (RACH) reception before finally determining the UE transition to the connected mode.

[0102] In some aspects, different times (e.g., within or between time slots) and / or different frequency TRS patterns may be dynamically configured and / or reconfigured according to the UE.

[0103] To achieve variable TRS periodicities complementary to the SSB pattern, only dynamic TRS activation and / or deactivation per UE and reconfigurable periodicity for each activation may be required. These capabilities may be achieved by an adaptive UE-specific TRS method.

[0104] Assuming SSB and TRS are superimposed, at least the following effective synchronization pilot periodicities may be obtained: 5 ms, 10 ms, 20 ms, and 40 ms. In some aspects, additional TRS periodicity options may include 80 ms or 160 ms to generate effective synchronization pilot periodicities of 40 ms or 80 ms.

[0105] Based at least in part on configuring the SSB for time periods having a first portion of the SSB at a first SSB periodicity and a second portion of the SSB at a second SSB periodicity, the network node and one or more UEs may save network, power, communication, and / or computing resources that may otherwise have been used to receive SSBs at an unnecessarily low periodicity (unnecessarily high density), which reduces spectral efficiency and requires an unnecessary amount of resources to transmit the same amount of data. Additionally or alternatively, configuring the SSB for time periods having a first portion of the SSB at a first SSB periodicity and a second portion of the SSB at a second SSB periodicity, the network node and one or more UEs may save network, power, communication, and / or computing resources that may otherwise have been used to attempt connection and reconnection with UEs at cell edges for which the SSB periodicity is too great to maintain a connection.

[0106] Based at least in part on using TRS to supplement an SSB period during a portion of a time period that has a periodicity that is too high for one or more UEs to maintain a connection to the cell, the network node and one or more UEs may save network, power, communication, and / or computing resources that might otherwise have been used to send and receive SSBs during the portion of the time period at a periodicity configured for all UEs in the cell (e.g., too large for some UEs and / or too small for other UEs).

[0107] Figure 5 is a diagram of an example 500 associated with using multiple SSB periodicities in a time period according to the present disclosure. Figure 5 As shown, a network node (e.g., base station 110, CU, DU, and / or RU) may communicate with a UE (e.g., UE 120). In some aspects, the network node and the UE may be part of a wireless network (e.g., wireless network 100). The UE and the network node may be in Figure 5 The illustrated operations have previously established a wireless connection. In some aspects, the UE may be one of a plurality of UEs within a cell provided by a network node. In some aspects, a network node may be configured to provide a cell for a geographic area and / or a defined distance from the network node.

[0108] As indicated by reference numeral 505, the network node may send configuration information, and the UE may receive the configuration information. In some aspects, the UE may receive the configuration information via one or more of RRC signaling, one or more MAC control elements (CEs), and / or downlink control information (DCI), etc. In some aspects, the configuration information may include an indication of one or more configuration parameters for the UE to select (e.g., known to the UE and / or previously indicated by the network node or other network device) and / or explicit configuration information for the UE to configure the UE, etc.

[0109] In some aspects, the configuration information may indicate that the UE will use RS (such as TRS) to supplement SSB to maintain a connection to the cell. For example, the configuration information may indicate that the UE will use TRS and SSB to perform frequency synchronization, time synchronization, and / or beam management. In some aspects, the configuration information may indicate that the UE will send an indication of signal strength (e.g., SNR, RSRP, or SINR), an indication of the combined periodicity of RS and SSB requested to maintain a connection to the cell, and / or one or more signals for the base station to measure to determine signal strength, and / or an estimated combined periodicity of RS and SSB required to maintain a connection to the cell, as well as other examples.

[0110] The UE may configure itself based at least in part on the configuration information.In some aspects, the UE may be configured to perform one or more operations described herein based at least in part on the configuration information.

[0111] As indicated by reference numeral 510, the UE may send a capability report and the network node may receive the capability report. In some aspects, the capability report may indicate that the UE supports receiving SSBs with variable periodicity. In some aspects, the capability report may indicate support for using RS (e.g., TRS) to supplement SSBs to maintain a connection to a cell. For example, the capability report may indicate the type of RS that the UE may use to supplement the SSBs, the amount of time required for cell acquisition, and the amount of time required for operations associated with maintaining a connection to a cell, and / or the combined periodicity required for operations associated with maintaining a connection to a cell.

[0112] As indicated by reference numeral 515, the UE may receive a configuration of an SSB having a first SSB periodicity and a second SSB periodicity for a time period, and the network node may send the configuration. For example, the UE may receive an indication of a configuration of an SSB for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period.

[0113] In some aspects, the configuration of the SSB may indicate that for each time period (e.g., for a number of periods, an amount of time, or until the network node provides an update, among other examples), a first portion of the time period is configured with a first SSB periodicity and a second portion of the time period is configured with a second SSB periodicity. In some aspects, the first SSB periodicity is a multiple of the second SSB periodicity (e.g., the first SSB periodicity is 2, 3, or 4 times the second SSB periodicity, among other examples).

[0114] In some aspects, the second SSB periodicity may be configured to support InitAcq (e.g., cell acquisition) for UEs at a cell edge. For example, the network node may be configured to support UEs that are in a defined geographic boundary or within a threshold distance from the network node. The network node may be configured with or may use machine learning to obtain a second SSB periodicity that supports InitAcq for UEs at a cell edge (e.g., at a location of the cell with the weakest signal strength).

[0115] In some aspects, the first SSB periodicity may be configured to support cell maintenance for UEs having a signal strength that satisfies a threshold (e.g., SNR>THR). In this way, the network node may not support maintaining a cell for all UEs within the cell using only SSB during the first portion of the time period.

[0116] As indicated by reference numeral 520, the UE may receive one or more RSs. For example, the UE may measure the one or more RSs to determine a downlink communication signal strength of a cell at the UE. The signal strength may include measured or estimated RSRP, SNR, or SINR, among other examples.

[0117] As indicated by reference numeral 525, the UE may determine the sufficiency of the first SSB periodicity for maintaining a connection to the cell. For example, the UE may test the first SSB periodicity or may use the signal strength of the RS to determine whether the first SSB periodicity is sufficient for the UE to maintain a connection to the cell. For example, the UE may determine whether the first SSB periodicity is sufficient to perform time synchronization, frequency synchronization, and / or beam management to maintain a connection to the cell.

[0118] As indicated by reference numeral 530, the UE may send an indication of a downlink SNR, whether the first SSB periodicity is sufficient, a requested combined periodicity, and / or an uplink signal supporting an estimation of the downlink SNR, among other examples, and the base station may receive the indication. For example, the UE may first determine the sufficiency of the first SSB periodicity, as described in conjunction with reference numeral 525, and then send an indication of whether the SSB periodicity is sufficient and / or send a requested combined periodicity (e.g., a combined periodicity of RS and SSB). In other examples, the UE may not determine the sufficiency of the first SSB periodicity (e.g., the operations described in conjunction with reference numeral 525 may be omitted), and the UE may send an indication of a downlink SNR and / or an uplink signal that a network node may use to determine and / or estimate the downlink SNR. The indication of the downlink SNR and / or uplink signal may support a determination by the network node of whether the first SSB periodicity is sufficient for the UE and / or a determination of a combined periodicity that will be sufficient for the UE.

[0119] In some aspects, the SNR and / or indication of the determined and / or estimated SNR may indicate that the first SSB periodicity is insufficient to maintain a connection to the cell.

[0120] As indicated by reference numeral 535, the network node may determine a combined periodicity sufficient to maintain connectivity to the cell of the UE. In some aspects, the network node may determine that the combined periodicity requires only SSBs during a first portion of the time period. In some aspects, the network node may determine that the combined periodicity requires both SSBs and TRSs during the first portion of the time period based at least in part on the first SSB periodicity.

[0121] In some aspects, the network node may determine the combined periodicity described in conjunction with reference numeral 535 based at least in part on the downlink SNR, whether the first SSB periodicity is sufficient, the requested combined periodicity, and / or an indication of an uplink signal supporting an estimate of the downlink SNR. In some aspects, the network node may use a configured MCS used in downlink communications that satisfies an error rate threshold. For example, the network node may estimate the downlink SNR based at least in part on the MCS used for downlink communications without incurring excessive errors.

[0122] In some aspects, the network node may identify one or more UEs, including or excluding Figure 5The UE shown has a first SSB periodicity that is insufficient to maintain a connection to a cell associated with the network node. For example, the network node may receive one or more indications of a downlink SNR from the one or more UEs, wherein identification of the one or more UEs for which the first SSB periodicity is insufficient is based at least in part on the one or more indications of the SNR from the one or more UEs. In some aspects, the network node may estimate the SNR based at least in part on uplink signals received from the one or more UEs or one or more of operational parameters for downlink communication, wherein identification of the one or more UEs for which the first SSB periodicity is insufficient is based at least in part on the estimated SNR. In some aspects, the network node may configure a combined periodicity of multiple SSBs and TRSs during a first portion of a time period to support timing synchronization or frequency synchronization for UEs for which the first SSB periodicity is insufficient.

[0123] As shown by reference numeral 540, the UE may receive indications to activate and deactivate one or more TRSs, and the network node may send these indications. For example, the UE may receive an indication to activate the TRS as a periodic RS during the first portion of the time period. The UE may also receive an indication to deactivate the TRS after the first portion of the time period (e.g., before starting the second portion of the time period) so that the TRS is deactivated during the second portion. In some aspects, the periodicity of the TRS may be configured to be 160ms, 80ms, 40ms, 20ms, or 10ms, among other examples. In some aspects, the UE may deactivate the TRS to avoid overlapping with the SSB during the first period. The UE may also receive an additional indication to activate the TRS after the SSB during the first period.

[0124] In some aspects, the network node may configure the TRS to have a combined periodicity with one or more SSBs to support a UE (e.g., at a cell edge) to synchronize timing with a cell, synchronize frequency with a cell, and / or perform beam management, among other examples.

[0125] In some aspects, the TRS may be a UE-specific TRS. In this way, a UE may have a different TRS configuration than another UE in the cell. For example, based at least in part on a signal strength at the UE being greater than a signal strength at an additional UE in the cell, the periodicity of the UE-specific TRS may be greater than the periodicity of a UE-specific TRS for the additional UE. Additionally or alternatively, based at least in part on capabilities of the UE and additional UEs in the cell (e.g., the UE may have the ability to maintain a connection to a cell with a lower SNR), the UE-specific TRS may be greater than the periodicity of a UE-specific TRS for the additional UE.

[0126] In some aspects, the UE may receive an indication of activation and deactivation of the TRS based at least in part on a failure of the UE's SNR or other signal strength metric to meet a threshold. In some aspects, the periodicity of the TRS may be based at least in part on the SNR, another signal strength metric, channel characteristics of a channel associated with the TRS, capabilities of the UE, and / or one or more scheduling constraints at a network node.

[0127] As indicated by reference numeral 545, the UE may receive one or more SSBs with a first SSB periodicity for a first portion of a time period, receive one or more SSBs with a second SSB periodicity for a second portion of the time period, and receive one or more TRSs between the transmission of the SSBs during the first portion of the time period, and the network node may transmit one or more SSBs with a first SSB periodicity for the first portion of the time period, transmit one or more SSBs with a second SSB periodicity for the second portion of the time period, and transmit one or more TRSs between the transmission of the SSBs during the first portion of the time period. In some aspects, the TRS or other RS ​​may be configured for timing synchronization, frequency synchronization, and / or beam management, among other examples. For example, the TRS or other RS ​​may span bandwidth and / or time resources to support timing synchronization, frequency synchronization, and / or beam management, among other examples.

[0128] In some aspects, the UE may receive an indication to activate and deactivate the one or more TRSs during the first portion of the time period and / or during the second portion of the time period.

[0129] In some aspects, the UE may receive additional SSBs and TRSs during a subsequent time period, wherein the configuration of the time period (e.g., associated with the SSB) is the same configuration as the subsequent time period. For example, the UE may receive multiple additional SSBs during a subsequent time period, wherein the multiple additional SSBs are received with a first SSB periodicity during a first portion of the subsequent time period and are received with a second SSB periodicity during a second portion of the subsequent time period.

[0130] As shown by reference numeral 550, the UE may maintain a connection to the cell based at least in part on the one or more SSBs and the one or more TRSs. For example, the UE may use the one or more SSBs and the one or more TRSs to synchronize timing with the cell, synchronize frequency with the cell, and / or perform beam management, among other examples.

[0131] Based at least in part on configuring the SSB for time periods having a first portion of the SSB at a first SSB periodicity and a second portion of the SSB at a second SSB periodicity, the network node and one or more UEs may save network, power, communication, and / or computing resources that may otherwise have been used to receive SSBs at an unnecessarily low periodicity (unnecessarily high density), which reduces spectral efficiency and requires an unnecessary amount of resources to transmit the same amount of data. Additionally or alternatively, configuring the SSB for time periods having a first portion of the SSB at a first SSB periodicity and a second portion of the SSB at a second SSB periodicity, the network node and one or more UEs may save network, power, communication, and / or computing resources that may otherwise have been used to attempt connection and reconnection with UEs at cell edges for which the SSB periodicity is too great to maintain a connection.

[0132] Based at least in part on using TRS to supplement an SSB period during a portion of a time period that has a periodicity that is too high for one or more UEs to maintain a connection to the cell, the network node and one or more UEs may save network, power, communication, and / or computing resources that might otherwise have been used to send and receive SSBs during the portion of the time period at a periodicity configured for all UEs in the cell (e.g., too large for some UEs and / or too small for other UEs).

[0133] As indicated above, Figure 5 are provided as examples. Other examples can be found in the Figure 5 Different from what is described.

[0134] Figure 6 600A, 600B, 600C, and 600D are diagrams of examples 600A, 600B, 600C, and 600D associated with using multiple SSB periodicities in a time period according to the present disclosure. Figure 6 In some aspects, a network node (e.g., base station 110, CU, DU, and / or RU) may communicate with a UE (e.g., UE 120) using a configuration including a first portion of an SSB having a first SSB periodicity and a second portion of an SSB having a second SSB periodicity. The network node may send RSs between the SSBs to supplement the SSBs and form a combined periodicity that is less than the first SSB periodicity. The network node may send SSBs and RSs within a first portion 605 of the time period and within a second portion 610 of the time period. In some aspects, the network node and the UE may be part of a wireless network (e.g., wireless network 100). The UE and the network node may be in Figure 6The illustrated operations have previously established a wireless connection. In some aspects, the UE may be one of a plurality of UEs within a cell provided by a network node. In some aspects, the network node may be configured to provide a cell for a geographic area and / or a defined distance from the network node.

[0135] As shown in example 600A, the network node may send SSBs with SSB periods 615A and with combined periods 620A including SSBs and RSs sent between the SSBs. The SSB period 615A may be 4 times the SSB period during the second portion of the time period. In this way, the SSBs may consume a reduced amount of overhead during the first portion of the time period. Additionally, the combined period 620A may be 2 times the SSB period during the second portion of the time period. In this way, for the UE, the combined overhead of the SSBs and TRSs may be less during the first portion 605 of the time period than during the second portion 610 of the time period.

[0136] As shown in example 600B, the network node may send SSBs with an SSB period 615B and with a combined period 620B including the SSBs and the RSs sent between the SSBs. The SSB period 615B may be 4 times the SSB period during the second portion of the time period. In this way, the SSBs may consume a reduced amount of overhead during the first portion of the time period. Additionally, the combined period 620B may be the same as the SSB period during the second portion of the time period. In this way, for the UE of example 600B, the combined overhead of the SSBs and TRSs may be the same during the first portion 605 of the time period as during the second portion 610 of the time period. However, if other UEs in the cell have a lower combined periodicity than the UE of example 600B, the network node may save network resources. For example, the UE of example 600B may be at the edge of the cell.

[0137] As shown in example 600C, the network node may send the SSB with an SSB period 615C and with a combined period 620C including the SSB and the RS sent between the SSBs. The SSB period 615C may be 4 times the SSB period during the second portion of the time period. In this way, the SSB may consume a reduced amount of overhead during the first portion of the time period. Additionally, the combined period 620C may be 4 / 3 times the SSB period during the second portion of the time period. In this way, for the UE, the combined overhead of the SSB and the TRS may be less during the first portion 605 of the time period than during the second portion 610 of the time period.

[0138] As shown in example 600D, the network node may send SSBs with an SSB period 615D and with a combined period 620D including the SSBs and the RSs sent between the SSBs. The SSB period 615D may be twice the SSB period during the second portion of the time period. In this way, the SSBs may consume a reduced amount of overhead during the first portion of the time period. Additionally, the combined period 620D may be the same as the SSB period during the second portion of the time period. In this way, for the UE of example 600D, the combined overhead of the SSBs and TRSs may be the same during the first portion 605 of the time period as during the second portion 610 of the time period. However, if other UEs in the cell have a lower combined periodicity than the UE of example 600B, the network node may save network resources. For example, the UE of example 600B may be at the edge of the cell.

[0139] Different configurations of the SSB period 615 may be used based at least in part on the minimum periodicity to support cell maintenance for UEs with signal strengths that meet a threshold and / or to support serving cell measurements and / or neighbor cell measurements. The combined period 620 may be UE-specific, which may allow the network node to customize the combined period 620 according to the requirements of the UE and / or network conditions at the UE.

[0140] In some aspects, the first portion 605 of the time period can be longer than the second portion 610 of the time period. In other aspects, the first portion 605 of the time period can be shorter than the second portion 610 of the time period. In some aspects, the total time period (e.g., the first portion 605 combined with the second portion 610) can be in the range of about 400 ms to about 10 seconds. The total time period can repeat for several time periods.

[0141] Although the first portion 605 is shown as preceding the second portion 610 in time, the first portion 605 (eg, the portion having a higher SSB periodicity) may occur after the second portion 610 in time.

[0142] As indicated above, Figure 6 are provided as examples. Other examples can be found in the Figure 6 Different from what is described.

[0143] Figure 7 is a diagram of an example 700 associated with using multiple SSB periodicities in a time period according to the present disclosure. Figure 7 As shown, a network node (e.g., base station 110, CU, DU, and / or RU) may communicate with a UE (e.g., UE 120). In some aspects, the network node and the UE may be part of a wireless network (e.g., wireless network 100). The UE and the network node may be in Figure 7The illustrated operations are preceded by establishing a wireless connection.In some aspects, a network node may be configured to provide cells for a geographic area and / or a defined distance from the network node.

[0144] As indicated by reference numeral 705, the network node may broadcast the SSB. In some aspects, the network node may broadcast the SSB using a variable periodicity. For example, the network node may broadcast the SSB with a first SSB periodicity during a first portion of a time period and broadcast the SSB with a second SSB periodicity during a second portion of the time period.

[0145] As indicated by reference numeral 710, the network node may send a TRS to a UE whose first periodicity is insufficient to maintain a connection in a cell.

[0146] The first UE may be able to receive SSB and / or TRS with sufficient periodicity, as indicated by reference numeral 715. For example, the first UE may have a signal strength in the cell that satisfies a threshold, which may cause the first UE to receive SSB but not TRS to achieve sufficient periodicity during the first portion of the time period.

[0147] The second UE may be able to receive the SSB and / or TRS with sufficient periodicity as indicated by reference numeral 720. For example, the second UE may be at a cell edge and may have a signal strength in the cell that fails to meet a threshold, which may cause the second UE to receive the SSB and TRS to achieve sufficient periodicity during the first portion of the time period.

[0148] The third UE may be able to receive SSB and / or TRS with sufficient periodicity, as indicated by reference numeral 725. For example, the third UE may have a signal strength in the cell that satisfies a threshold, which may cause the third UE to receive SSB but not TRS to achieve sufficient periodicity during the first portion of the time period.

[0149] The fourth UE may be able to receive the SSB and / or TRS with sufficient periodicity, as indicated by reference numeral 730. For example, the fourth UE may be at a cell edge and may have a signal strength in the cell that fails to meet a threshold, which may cause the UE to receive the SSB and TRS to achieve sufficient periodicity during the first portion of the time period.

[0150] In some aspects, UEs of a cell may receive TRS with different periodicities. For example, the different periodicities may be based at least in part on the UE's capabilities (e.g., maintaining the cell with SSB and / or RS) and / or the signal strength at the UE.

[0151] As indicated above, Figure 7 are provided as examples. Other examples can be found in the Figure 7 Different from what is described.

[0152] Figure 8 8 is a diagram illustrating an example process 800 performed, for example, by a UE in accordance with the present disclosure. Example process 800 is an example in which a UE (eg, UE 120) performs operations associated with multiple SSB periodicities in a time period.

[0153] like Figure 8 As shown, in some aspects, process 800 may include receiving an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period (block 810). For example, a UE (e.g., using communication manager 140 and / or receiving component 1002, such as Fig.10 ) may receive an indication of a configuration of SSB for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period, as described above.

[0154] like Figure 8 As further shown, in some aspects, process 800 may include receiving a plurality of SSBs during the time period, the plurality of SSBs being received with a first SSB periodicity during a first portion of the time period and being received with a second SSB periodicity during a second portion of the time period (block 820). For example, a UE (e.g., using communication manager 140 and / or receiving component 1002, such as Fig.10 ) may receive multiple SSBs during the time period, the multiple SSBs being received with a first SSB periodicity during a first portion of the time period and being received with a second SSB periodicity during a second portion of the time period, as described above.

[0155] Process 800 may include additional aspects, such as any single aspect and / or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0156] In a first aspect, process 800 includes sending an indication of a downlink SNR, wherein the indication of the downlink SNR indicates that a first SSB periodicity is insufficient to maintain a connection to a cell, or sending an uplink signal supporting an estimate of the downlink SNR.

[0157] In a second aspect, alone or in combination with the first aspect, maintaining the connection to the cell comprises one or more of: synchronizing timing with the cell, synchronizing frequency with the cell, or performing beam management.

[0158] In a third aspect, either alone or in combination with one or more of the first and second aspects, process 800 includes receiving TRSs between transmissions of SSBs during a first portion of a time period, wherein the TRSs are configured for one or more of timing synchronization or frequency synchronization.

[0159] In a fourth aspect, alone or in combination with one or more of the first to third aspects, receiving the TRS includes receiving the TRS with a periodicity of 160ms, 80ms, 40ms, 20ms or 10ms.

[0160] In a fifth aspect, either alone or in combination with one or more of aspects 1 to 4, process 800 includes performing one or more of timing synchronization or frequency synchronization based at least in part on a combined periodicity of multiple SSBs and TRSs during a first portion of a time period.

[0161] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the TRSs are UE-specific TRSs, and wherein the UE receives the UE-specific TRSs based at least in part on having a downlink SNR that fails to meet a threshold.

[0162] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, process 800 includes receiving an indication to activate the TRS during the first portion, and receiving an indication to deactivate the TRS during the second portion.

[0163] In an eighth aspect, either alone or in combination with one or more of aspects 1 to 7, process 800 includes receiving an additional indication to deactivate a TRS that may have overlapped with an SSB during the first portion, and receiving an additional indication to activate the TRS after the SSB during the first portion.

[0164] In a ninth aspect, either alone or in combination with one or more of aspects 1 to 8, the periodicity of the TRS is based at least in part on one or more of: the SNR of the UE, channelization characteristics of the channel associated with the TRS, capabilities of the UE, or scheduling constraints.

[0165] In a tenth aspect, alone or in combination with one or more of aspects one through nine, process 800 includes receiving a plurality of additional SSBs during a subsequent time period, the plurality of additional SSBs being received with a first SSB periodicity during a first portion of the subsequent time period and being received with a second SSB periodicity during a second portion of the subsequent time period.

[0166] In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, the second SSB periodicity is configured to support cell acquisition of one or more additional UEs at a cell edge of a cell associated with the SSB.

[0167] although Figure 8 An example block diagram of process 800 is shown, but in some aspects, process 800 may include Figure 8 The blocks depicted may be additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted. Additionally or alternatively, two or more of the blocks of process 800 may be performed in parallel.

[0168] Fig. 9 900 is a diagram illustrating an example process 900 performed, for example, by a network node according to the present disclosure. Example process 900 is an example in which a network node (e.g., base station 110, CU, DU, and / or RU) performs operations associated with multiple SSB periodicities in a time period.

[0169] like Fig. 9 As shown, in some aspects, process 900 may include sending an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period (block 910). For example, a network node (e.g., using communication manager 150 and / or transmitting component 1104, such as Fig.11 ) may send an indication of a configuration of SSB for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period, as described above.

[0170] like Fig. 9 As further shown, in some aspects, process 900 may include transmitting a plurality of SSBs during the time period, the plurality of SSBs being transmitted with a first SSB periodicity during a first portion of the time period and being transmitted with a second SSB periodicity during a second portion of the time period (block 920). For example, a network node (e.g., using communication manager 150 and / or transmitting component 1104, such as Fig.11 ) may send multiple SSBs during the time period, the multiple SSBs being sent with a first SSB periodicity during a first portion of the time period and being sent with a second SSB periodicity during a second portion of the time period, as described above.

[0171] Process 900 may include additional aspects, such as any single aspect and / or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0172] In a first aspect, process 900 includes identifying one or more UEs for which a first SSB periodicity is insufficient to maintain a connection to a cell associated with a network node.

[0173] In a second aspect, either alone or in combination with the first aspect, process 900 includes receiving one or more indications of a downlink signal-to-noise ratio (SNR) from the one or more UEs, wherein identification of the one or more UEs for which the first SSB periodicity is insufficient is based at least in part on the one or more indications of the SNR from the one or more UEs, or estimating the SNR based at least in part on one or more of an uplink signal received from the one or more UEs or an operational parameter for downlink communication.

[0174] In a third aspect, alone or in combination with one or more of the first and second aspects, maintaining the connection to the cell comprises one or more of: synchronizing timing with the cell, synchronizing frequency with the cell, or performing beam management.

[0175] In a fourth aspect, either alone or in combination with one or more of aspects 1 to 3, process 900 includes sending TRSs to one or more UEs between transmissions of SSBs during a first portion of a time period, wherein the TRSs are configured for one or more of timing synchronization, frequency synchronization, or beam management.

[0176] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, sending the TRS includes sending the TRS with a periodicity of 160ms, 80ms, 40ms, 20ms or 10ms.

[0177] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, process 900 includes configuring a combined periodicity of a plurality of SSBs and TRSs during a first portion of a time period to support timing synchronization or frequency synchronization.

[0178] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, the TRSs are UE-specific TRSs.

[0179] In an eighth aspect, alone or in combination with one or more of aspects one to seven, process 900 includes sending an indication to activate the TRS for the one or more UEs during a first part, and sending an indication to deactivate the TRS for the one or more UEs during a second part.

[0180] In a ninth aspect, either alone or in combination with one or more of aspects 1 to 8, process 900 includes sending an additional indication to deactivate a TRS that may have overlapped with an SSB during the first portion, and sending an additional indication to activate the TRS after the SSB during the first portion.

[0181] In a tenth aspect, either alone or in combination with one or more of aspects 1 to 9, the periodicity of the TRS per UE is based at least in part on one or more of: the SNR of the UE, channelization characteristics, capabilities of the UE, or scheduling constraints.

[0182] In an eleventh aspect, alone or in combination with one or more of aspects one to ten, process 900 includes sending a plurality of additional SSBs during a subsequent time period, the plurality of additional SSBs being sent with a first SSB periodicity during a first portion of the subsequent time period and being sent with a second SSB periodicity during a second portion of the subsequent time period.

[0183] In a twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the second SSB periodicity is configured to support cell acquisition of one or more additional UEs at a cell edge of a cell associated with the SSB.

[0184] although Fig. 9 An example block diagram of process 900 is shown, but in some aspects, process 900 may include Fig. 9 The blocks depicted may be additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted. Additionally or alternatively, two or more of the blocks of process 900 may be performed in parallel.

[0185] Fig.10 1 is a diagram of an example apparatus 1000 for wireless communication. Apparatus 1000 may be a UE, or a UE may include apparatus 1000. In some aspects, apparatus 1000 includes a receiving component 1002 and a transmitting component 1004 that may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1000 may communicate with another apparatus 1006 (such as a UE, a base station, or another wireless communication device) using receiving component 1002 and transmitting component 1004. As further shown, apparatus 1000 may include a communication manager 1008 (e.g., communication manager 140).

[0186] In some aspects, the apparatus 1000 may be configured to perform Figures 5 to 7 Additionally or alternatively, the apparatus 1000 may be configured to perform one or more processes described herein, such as Figure 8The process 800. In some aspects, Fig.10 The device 1000 and / or one or more components shown may include a combination of Figure 2 One or more components of the UE. Additionally or alternatively, Fig.10 One or more of the components shown may be combined with Figure 2 Additionally or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the function or operation of the component.

[0187] The receiving component 1002 may receive communications, such as reference signals, control information, data communications, or combinations thereof, from the device 1006. The receiving component 1002 may provide the received communications to one or more other components of the device 1000. In some aspects, the receiving component 1002 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 1000. In some aspects, the receiving component 1002 may include combining Figure 2 One or more antennas, modems, demodulators, MIMO detectors, receiving processors, controllers / processors, memories or combinations thereof of the UE.

[0188] The transmitting component 1004 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1006. In some aspects, one or more other components of the device 1000 may generate communications and may provide the generated communications to the transmitting component 1004 for transmission to the device 1006. In some aspects, the transmitting component 1004 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the device 1006. In some aspects, the transmitting component 1004 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the UE. In some aspects, the transmit component 1004 can be co-located with the receive component 1002 in a transceiver.

[0189] Receiving component 1002 may receive an indication of an SSB configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. Receiving component 1002 may receive a plurality of SSBs during the time period, the plurality of SSBs being received at the first SSB periodicity during the first portion of the time period and being received at the second SSB periodicity during the second portion of the time period.

[0190] The transmitting component 1004 can transmit an indication of a downlink SNR, wherein the indication of the downlink SNR indicates that the first SSB periodicity is insufficient to maintain a connection to a cell.

[0191] Transmitting component 1004 can transmit an uplink signal supporting an estimation of the downlink SNR.

[0192] The receiving component 1002 can receive TRSs between transmissions of the SSBs during a first portion of the time period, wherein the TRSs are configured for one or more of timing synchronization or frequency synchronization.

[0193] The communications manager 1008 may perform one or more of timing synchronization or frequency synchronization based at least in part on the combined periodicity of the plurality of SSBs and TRSs during the first portion of the time period.

[0194] Receiving component 1002 can receive an indication to activate the TRS during the first portion.

[0195] Receiving component 1002 can receive an indication to deactivate the TRS during the second portion.

[0196] Receiving component 1002 can receive an additional indication to deactivate a TRS that would otherwise overlap with the SSB during the first portion.

[0197] Receiving component 1002 can receive an additional indication to activate the TRS after the SSB during the first portion.

[0198] The receiving component 1002 can receive a plurality of additional SSBs during a subsequent time period, the plurality of additional SSBs being received with a first SSB periodicity during a first portion of the subsequent time period and being received with a second SSB periodicity during a second portion of the subsequent time period.

[0199] Fig.10 The number and arrangement of components shown are provided as examples. In practice, there may be Fig.10 Additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig.10 Two or more components shown may be implemented in a single component, or Fig.10 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig.10 The component set (one or more components) shown may be described as being executable by Fig.10 Another component shown may be a collection of components that perform one or more functions.

[0200] Fig.11 1 is a diagram of an example apparatus 1100 for wireless communication. Apparatus 1100 may be a network node, or a network node may include apparatus 1100. In some aspects, apparatus 1100 includes a receiving component 1102 and a transmitting component 1104, which may communicate with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 1100 may communicate with another apparatus 1106 (such as a UE, a base station, or another wireless communication device) using receiving component 1102 and transmitting component 1104. As further shown, apparatus 1100 may include a communication manager 1108 (e.g., communication manager 150).

[0201] In some aspects, the apparatus 1100 may be configured to perform Figures 5 to 7 Additionally or alternatively, the apparatus 1100 may be configured to perform one or more processes described herein, such as Fig. 9 The process 900. In some aspects, Fig.11 The device 1100 and / or one or more components shown may include a combination of Figure 2 One or more components of the network node. Additionally or alternatively, Fig.11 One or more of the components shown may be combined with Figure 2 Additionally or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the function or operation of the component.

[0202] The receiving component 1102 may receive communications from the device 1106, such as reference signals, control information, data communications, or combinations thereof. The receiving component 1102 may provide the received communications to one or more other components of the device 1100. In some aspects, the receiving component 1102 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, etc.) on the received communications and may provide the processed signals to one or more other components of the device 1100. In some aspects, the receiving component 1102 may include combining Figure 2One or more antennas, modems, demodulators, MIMO detectors, receiving processors, controllers / processors, memories or combinations thereof of the network node.

[0203] The transmitting component 1104 may transmit communications, such as reference signals, control information, data communications, or combinations thereof, to the device 1106. In some aspects, one or more other components of the device 1100 may generate communications and may provide the generated communications to the transmitting component 1104 for transmission to the device 1106. In some aspects, the transmitting component 1104 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, etc.) on the generated communications and may transmit the processed signals to the device 1106. In some aspects, the transmitting component 1104 may include combining Figure 2 One or more antennas, modems, modulators, transmit MIMO processors, transmit processors, controllers / processors, memories, or combinations thereof of the network node. In some aspects, the transmit component 1104 can be co-located with the receive component 1102 in a transceiver.

[0204] The transmitting component 1104 may transmit an indication of an SSB configuration for the time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period. The transmitting component 1104 may transmit a plurality of SSBs during the time period, the plurality of SSBs being transmitted at the first SSB periodicity during the first portion of the time period and being transmitted at the second SSB periodicity during the second portion of the time period.

[0205] The communications manager 1108 may identify one or more UEs for which the first SSB periodicity is insufficient to maintain a connection to a cell associated with the network node.

[0206] The receiving component 1102 may receive one or more indications of a downlink SNR from the one or more UEs, wherein identification of the one or more UEs for insufficient first SSB periodicity is based at least in part on the one or more indications of the SNR from the one or more UEs.

[0207] Communications manager 1108 may estimate the SNR based at least in part on one or more of uplink signals received from the one or more UEs or operational parameters for downlink communications.

[0208] The transmitting component 1104 can transmit TRSs to one or more UEs between transmissions of the SSBs during a first portion of the time period, wherein the TRSs are configured for one or more of timing synchronization, frequency synchronization, or beam management.

[0209] The communication manager 1108 may configure a combined periodicity of multiple SSBs and TRSs during the first portion of the time period to support timing synchronization or frequency synchronization.

[0210] Transmitting component 1104 can transmit an indication to activate the TRS for the one or more UEs during the first portion.

[0211] Transmitting component 1104 can transmit an indication to deactivate the TRS for the one or more UEs during the second portion.

[0212] Transmitting component 1104 can transmit an additional indication to deactivate a TRS that may otherwise overlap with the SSB during the first portion.

[0213] Transmitting component 1104 can transmit an additional indication to activate the TRS after the SSB during the first portion.

[0214] The transmitting component 1104 can transmit a plurality of additional SSBs during a subsequent time period, the plurality of additional SSBs being transmitted with a first SSB periodicity during a first portion of the subsequent time period and being transmitted with a second SSB periodicity during a second portion of the subsequent time period.

[0215] Fig.11 The number and arrangement of components shown are provided as examples. In practice, there may be Fig.11 Additional components, fewer components, different components, or components arranged in a different manner than those shown. Fig.11 Two or more components shown may be implemented in a single component, or Fig.11 The single component shown may be implemented as multiple distributed components. Additionally or alternatively, Fig.11 The illustrated set (one or more) of components may be described as being executable by Fig.11 Another group of components shown performs one or more functions.

[0216] The following provides an overview of some aspects of the disclosure:

[0217] Aspect 1: A method of wireless communication performed by a user equipment (UE), the method comprising: receiving an indication of a synchronization signal block (SSB) configuration for a time period, the configuration indicating a first SSB periodicity for a first part of the time period and a second SSB periodicity for a second part of the time period; and receiving multiple SSBs during the time period, the multiple SSBs being received with the first SSB periodicity during the first part of the time period and being received with the second SSB periodicity during the second part of the time period.

[0218] Aspect 2: According to the method described in Aspect 1, the method also includes: sending an indication of a downlink SNR, wherein the indication of the downlink SNR indicates that the first SSB periodicity is insufficient to maintain a connection to a cell; or sending an uplink signal supporting an estimation of the downlink SNR.

[0219] Aspect 3: The method according to aspect 2, wherein maintaining the connection to the cell comprises one or more of: synchronizing timing with the cell, synchronizing frequency with the cell, or performing beam management.

[0220] Aspect 4: According to the method described in any one of Aspects 1 to 3, the method further includes: receiving a tracking reference signal (TRS) between the transmission of the SSB during the first part of the time period, wherein the TRS is configured for one or more of timing synchronization or frequency synchronization.

[0221] Aspect 5: The method according to aspect 4, wherein receiving the TRS includes: receiving the TRS with a periodicity of 160 milliseconds (ms), 80 ms, 40 ms, 20 ms or 10 ms.

[0222] Aspect 6: According to any one of Aspects 4 or 5, the method also includes: during the first part of the time period, performing one or more of timing synchronization or frequency synchronization based at least in part on the combined periodicity of the multiple SSBs and the TRS.

[0223] Aspect 7: The method according to any one of aspects 4 to 6, wherein the TRS is a UE-specific TRS, and wherein the UE receives the UE-specific TRS based at least in part on having a downlink SNR that fails to meet a threshold.

[0224] Aspect 8: The method according to any one of aspects 4 to 7, further comprising: receiving an indication to activate the TRS during the first part; and receiving an indication to deactivate the TRS during the second part.

[0225] Aspect 9: The method according to Aspect 8 further includes: receiving an additional indication to deactivate the TRS that may have overlapped with the SSB during the first part; and receiving an additional indication to activate the TRS after the SSB during the first part.

[0226] Aspect 10: A method according to any one of Aspects 4 to 9, wherein the periodicity of the TRS is based at least in part on one or more of: a signal-to-noise ratio (SNR) of the UE, channel characteristics of a channel associated with the TRS, capabilities of the UE, or scheduling constraints.

[0227] Aspect 11: According to any one of aspects 1 to 10, the method further includes: receiving multiple additional SSBs during a subsequent time period, the multiple additional SSBs are received with the first SSB periodicity during a first part of the subsequent time period, and are received with the second SSB periodicity during a second part of the subsequent time period.

[0228] Aspect 12: A method according to any one of aspects 1 to 11, wherein the second SSB periodicity is configured to support cell acquisition of one or more additional UEs at a cell edge of a cell associated with the SSB.

[0229] Aspect 13: A method of wireless communication performed by a network node, the method comprising: sending an indication of a synchronization signal block (SSB) configuration for a time period, the configuration indicating a first SSB periodicity for a first part of the time period and a second SSB periodicity for a second part of the time period; and sending multiple SSBs during the time period, the multiple SSBs being sent with the first SSB periodicity during the first part of the time period and being sent with the second SSB periodicity during the second part of the time period.

[0230] Aspect 14: The method according to aspect 13, the method further comprising: identifying one or more user equipments (UEs) for which the first SSB periodicity is insufficient to maintain a connection to a cell associated with the network node.

[0231] Aspect 15: According to the method according to Aspect 14, the method also includes: receiving one or more indications of a downlink signal-to-noise ratio (SNR) from the one or more UEs, wherein the identification of the one or more UEs for which the first SSB periodicity is insufficient is at least partially based on the one or more indications of the SNR from the one or more UEs, or estimating the SNR at least partially based on one or more of an uplink signal received from the one or more UEs or an operational parameter for downlink communication.

[0232] Aspect 16: The method according to any one of aspects 14 or 15, wherein maintaining the connection to the cell comprises one or more of: synchronizing timing with the cell, synchronizing frequency with the cell, or performing beam management.

[0233] Aspect 17: According to any one of Aspects 13 to 16, the method further includes: during the first part of the time period, sending a tracking reference signal (TRS) to one or more user equipment (UE) between the transmission of the SSB, wherein the TRS is configured for one or more of timing synchronization, frequency synchronization or beam management.

[0234] Aspect 18: The method according to aspect 17, wherein sending the TRS includes: sending the TRS with a periodicity of 160 milliseconds (ms), 80 ms, 40 ms, 20 ms or 10 ms.

[0235] Aspect 19: The method according to any one of Aspects 17 or 18, further comprising: configuring a combined periodicity of the plurality of SSBs and the TRS during the first portion of the time period to support timing synchronization or frequency synchronization.

[0236] Aspect 20: According to the method described in any one of Aspects 17 to 19, the TRS is sent to the one or more UEs at least in part based on the one or more UEs having a downlink signal-to-noise ratio (SNR) that fails to meet a threshold, wherein the TRS is a UE-specific TRS.

[0237] Aspect 21: According to any one of Aspects 17 to 20, the method further includes: sending an indication to activate the TRS for the one or more UEs during the first part; and sending an indication to deactivate the TRS for the one or more UEs during the second part.

[0238] Aspect 22: The method according to Aspect 21 further comprises: sending an additional indication to deactivate the TRS that may have overlapped with the SSB during the first part; and sending an additional indication to activate the TRS after the SSB during the first part.

[0239] Aspect 23: A method according to any one of Aspects 17 to 22, wherein the periodicity of the TRS per UE is based at least in part on one or more of the following: a signal-to-noise ratio (SNR) of the UE, channel characteristics, capabilities of the UE, or scheduling constraints.

[0240] Aspect 24: According to any one of Aspects 17 to 23, the method further includes: sending multiple additional SSBs during a subsequent time period, wherein the multiple additional SSBs are sent with the first SSB periodicity during a first part of the subsequent time period and are sent with the second SSB periodicity during a second part of the subsequent time period.

[0241] Aspect 25: A method according to any one of aspects 13 to 24, wherein the second SSB periodicity is configured to support cell acquisition of one or more additional UEs at a cell edge of a cell associated with the SSB.

[0242] Aspect 26: An apparatus for performing wireless communications at a device, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform one or more of the methods described in Aspects 1 to 25.

[0243] Aspect 27: A device for wireless communication, the device comprising a memory and one or more processors coupled to the memory, the one or more processors configured to perform the method according to one or more of aspects 1 to 25.

[0244] Aspect 28: An apparatus for wireless communication, the apparatus comprising: at least one means for performing the method according to one or more of aspects 1 to 25.

[0245] Aspect 29: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method according to one or more of aspects 1 to 25.

[0246] Aspect 30: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform one or more of the methods described in aspects 1 to 25.

[0247] 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 various aspects.

[0248] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware and / or hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language or other names, "software" should be broadly interpreted as meaning instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures and / or functions, etc. As used herein, a "processor" is implemented in a combination of hardware and / or hardware and software. It will be apparent that the systems and / or methods described herein can be implemented by a combination of hardware and / or hardware and software in different forms. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Therefore, there is no reference to a specific software code herein to describe the operation and behavior of the system and / or method, because those skilled in the art will understand that software and hardware can be designed to implement the system and / or method based at least in part on the description herein.

[0249] As used herein, "satisfying a threshold" may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0250] Although the specific combination of features is set forth in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. Many of these features can be combined in a manner that is not specifically described in the claims and / or is not disclosed in the specification. The disclosure of various aspects includes each dependent claim combined with each other claim in the claim set. As used herein, the phrase "at least one of" the list of items refers to any combination of these items (it includes a single member). 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, and any combination with multiple identical elements (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 sorting of a, b and c).

[0251] Any element, action or instruction used herein should not be interpreted as key or necessary, unless explicitly described as such. In addition, as used herein, the article "one" is intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the article "said" is intended to include one or more items connected to the article "said", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items, and can be used interchangeably with "one or more". If only one item is intended to be referred to, the phrase "only one" or similar terms will be used. Moreover, as used herein, the terms "have", "have" etc. are intended to be open terms, which do not limit the elements they modify (for example, "elements with" A can also have B). In addition, the phrase "based on" is intended to represent "based at least in part on", unless explicitly stated otherwise. Furthermore, as used herein, the term "or" when used in a series is intended to be open-ended and used interchangeably with "and / or" unless explicitly stated otherwise (eg, if used in conjunction with "either" or "only one of").

Claims

1. A user equipment (UE) for wireless communication, the user equipment (UE) comprising: Memory; and one or more processors coupled to the memory and configured to: receiving an indication of a synchronization signal block (SSB) configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period; as well as A plurality of SSBs are received during the time period, the plurality of SSBs being received with the first SSB periodicity during the first portion of the time period and being received with the second SSB periodicity during the second portion of the time period.

2. The UE of claim 1, wherein the one or more processors are further configured to: Sending an indication of a downlink signal-to-noise ratio (SNR), wherein the indication of the downlink SNR indicates that the first SSB periodicity is insufficient to maintain a connection to a cell, or sending an uplink signal supporting an estimate of the downlink SNR.

3. The UE of claim 2, wherein to maintain the connection to the cell, the one or more processors are configured to: Synchronize timing with the cell, Synchronize frequency with the cell, or Perform beam management.

4. The UE of claim 1, wherein the one or more processors are further configured to: receiving a tracking reference signal (TRS) between transmissions of the SSB during the first portion of the time period, The TRS is configured for one or more of timing synchronization or frequency synchronization.

5. The UE of claim 4, wherein to receive the TRS, the one or more processors are configured to: The TRS is received with a periodicity of 160 milliseconds (ms), 80 ms, 40 ms, 20 ms, or 10 ms.

6. The UE of claim 4, wherein the one or more processors are further configured to: During the first portion of the time period, one or more of timing synchronization or frequency synchronization is performed based at least in part on a combined periodicity of the plurality of SSBs and the TRS.

7. The UE of claim 4, wherein the TRS is a UE-specific TRS, and wherein the UE receives the UE-specific TRS based at least in part on a downlink signal-to-noise ratio (SNR) having a failure to meet a threshold.

8. The UE of claim 4, wherein the one or more processors are further configured to: receiving an indication to activate the TRS during the first portion; and An indication is received to deactivate the TRS during the second portion.

9. The UE of claim 8, wherein the one or more processors are further configured to: receiving an additional indication to deactivate the TRS that would otherwise overlap with the SSB during the first portion; and An additional indication is received to activate the TRS after the SSB during the first portion.

10. The UE of claim 4, wherein the periodicity of the TRS is based at least in part on one or more of: the signal-to-noise ratio (SNR) of the UE, channel characteristics of the channel associated with the TRS, the capabilities of the UE, or Scheduling constraints.

11. The UE of claim 1 , wherein the one or more processors are further configured to: A plurality of additional SSBs are received during a subsequent time period, the plurality of additional SSBs being received with the first SSB periodicity during a first portion of the subsequent time period and being received with the second SSB periodicity during a second portion of the subsequent time period.

12. The UE of claim 1, wherein the second SSB periodicity is configured to support cell acquisition by one or more additional UEs at a cell edge of a cell associated with the SSB.

13. A network node for wireless communication, the network node comprising: Memory; and one or more processors coupled to the memory and configured to: sending an indication of a synchronization signal block (SSB) configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period; as well as A plurality of SSBs are transmitted during the time period, the plurality of SSBs being transmitted with the first SSB periodicity during the first portion of the time period and being transmitted with the second SSB periodicity during the second portion of the time period.

14. The network node of claim 13, wherein the one or more processors are further configured to: One or more user equipments (UEs) for which the first SSB periodicity is insufficient to maintain a connection to a cell associated with the network node are identified.

15. The network node of claim 14, wherein the one or more processors are further configured to: receiving one or more indications of downlink signal-to-noise ratios (SNRs) from the one or more UEs, wherein identification of the one or more UEs for which the first SSB periodicity is insufficient is based at least in part on the one or more indications of the SNRs from the one or more UEs, or The SNR is estimated based at least in part on one or more of uplink signals received from the one or more UEs or operational parameters for downlink communications.

16. The network node of claim 14, wherein to maintain the connection to the cell, the one or more processors are configured to: Synchronize timing with the cell, Synchronize frequency with the cell or Perform beam management.

17. The network node of claim 13, wherein the one or more processors are further configured to: transmitting a tracking reference signal (TRS) to one or more user equipments (UEs) between transmissions of the SSBs during the first portion of the time period, The TRS is configured for one or more of timing synchronization, frequency synchronization or beam management.

18. The network node of claim 17, wherein to send the TRS, the one or more processors are configured to: The TRS is transmitted with a periodicity of 160 milliseconds (ms), 80 ms, 40 ms, 20 ms, or 10 ms.

19. The network node of claim 17, wherein the one or more processors are further configured to: A combined periodicity of the plurality of SSBs and the TRS is configured during the first portion of the time period to support timing synchronization or frequency synchronization.

20. The network node of claim 17, sending the TRS to the one or more UEs based at least in part on the one or more UEs having a downlink signal-to-noise ratio (SNR) that fails to meet a threshold, The TRS is a UE-specific TRS.

21. The network node of claim 17, wherein the one or more processors are further configured to: sending an indication to activate the TRS for the one or more UEs during the first portion; and An indication is sent to deactivate the TRS for the one or more UEs during the second portion.

22. The network node of claim 21, wherein the one or more processors are further configured to: sending an additional indication to deactivate the TRS that would otherwise overlap with the SSB during the first portion; and An additional indication is sent to activate the TRS after the SSB during the first part.

23. The network node of claim 17, wherein a periodicity of the TRS per UE is based at least in part on one or more of: the signal-to-noise ratio (SNR) of the UE, Channel characteristics, the capabilities of the UE, or Scheduling constraints.

24. The network node of claim 17, wherein the one or more processors are further configured to: A plurality of additional SSBs are sent during a subsequent time period, the plurality of additional SSBs being sent with the first SSB periodicity during a first portion of the subsequent time period and being sent with the second SSB periodicity during a second portion of the subsequent time period.

25. The network node of claim 13, wherein the second SSB periodicity is configured to support cell acquisition by one or more additional UEs at a cell edge of a cell associated with the SSB.

26. A method of wireless communication performed by a user equipment (UE), the method comprising: receiving an indication of a synchronization signal block (SSB) configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period; as well as A plurality of SSBs are received during the time period, the plurality of SSBs being received with the first SSB periodicity during the first portion of the time period and being received with the second SSB periodicity during the second portion of the time period.

27. The method according to claim 26, further comprising: receiving a tracking reference signal (TRS) between transmissions of the SSB during the first portion of the time period, The TRS is configured for one or more of timing synchronization or frequency synchronization.

28. The method according to claim 27, further comprising: During the first portion of the time period, one or more of timing synchronization or frequency synchronization is performed based at least in part on a combined periodicity of the plurality of SSBs and the TRS.

29. A method of wireless communication performed by a network node, the method comprising: sending an indication of a synchronization signal block (SSB) configuration for a time period, the configuration indicating a first SSB periodicity for a first portion of the time period and a second SSB periodicity for a second portion of the time period; as well as A plurality of SSBs are transmitted during the time period, the plurality of SSBs being transmitted with the first SSB periodicity during the first portion of the time period and being transmitted with the second SSB periodicity during the second portion of the time period.

30. The method according to claim 29, further comprising: transmitting a tracking reference signal (TRS) to one or more user equipments (UEs) between transmissions of the SSBs during the first portion of the time period, The TRS is configured for one or more of timing synchronization, frequency synchronization or beam management.

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