Techniques for allocating synchronization signal block (SSB) frequencies in wireless communications

Abstract

Aspects described herein relate to transmitting one or more parameters related to a frequency selected by a network node for transmitting a synchronization signal block (SSB), and receiving the SSB from the network node on the frequency based on transmitting the one or more parameters. Other aspects involve receiving the one or more parameters and selecting the frequency for transmitting the SSB based on the one or more parameters.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. non-provisional patent application No. 17 / 929,589, entitled TECHNIQUES FOR ALLOCATING SYNCHRONIZATION SIGNALBLOCK (SSB) FREQUENCY IN WIRELESS COMMUNICATIONS, filed on September 2, 2022, which is expressly incorporated herein by reference in its entirety. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communication systems, and more particularly to techniques for sending synchronization signal blocks (SSBs).

[0004] Related technologies

[0005] Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, etc. These systems may be multiple-access systems capable of supporting communication with multiple users by sharing the available system resources (e.g., time, frequency, and power). Examples of such multiple-access systems 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, and single-carrier frequency division multiple access (SC-FDMA) systems.

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city, country, region, or even global level. For example, the fifth generation (5G) wireless communication technology, which may be referred to as 5G New Radio (5G NR), is designed to expand and support diverse usage scenarios and applications for current mobile network generations. On the one hand, 5G communication technology may include: enhanced mobile broadband addressing people-centric use cases for accessing multimedia content, services, and data; ultra-reliable low-latency communications (URLLC) with certain specifications for latency and reliability; and massive machine-type communications that may allow very large numbers of connected devices and the transmission of relatively small amounts of non-delay-sensitive information. Summary of the invention

[0007] The following presents a simplified summary of one or more aspects in order to provide a basic understanding of these aspects. This summary is not an extensive overview of all contemplated aspects, and is neither intended to identify key or important elements of all aspects, nor to describe the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to a more detailed description presented later.

[0008] According to one aspect, an apparatus for wireless communication is provided, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory. The instructions, when executed by the processor, are operable to cause the apparatus to: send one or more parameters related to a frequency selected by a network node for sending a synchronization signal block (SSB), and receive the SSB from the network node on the frequency based on sending the one or more parameters.

[0009] In another aspect, an apparatus for wireless communication is provided, the apparatus comprising: a processor; a memory coupled to the processor; and instructions stored in the memory. The instructions, when executed by the processor, are operable to cause the apparatus to: receive one or more parameters related to selecting a frequency for transmitting an SSB for one or more user equipment (UE), select a frequency for transmitting the SSB based on the one or more parameters, and transmit the SSB on the frequency based on the one or more parameters.

[0010] In another aspect, a method for wireless communication at a UE is provided, comprising sending one or more parameters related to a frequency selected by a network node for sending an SSB, and receiving the SSB from the network node on the frequency based on sending the one or more parameters.

[0011] On the other hand, a method for wireless communication at a network node is provided, comprising: receiving one or more parameters related to selecting a frequency for sending an SSB for one or more UEs; selecting a frequency for sending the SSB based on the one or more parameters; and sending the SSB on the frequency based on the one or more parameters.

[0012] In a further aspect, an apparatus for wireless communication is provided, the apparatus comprising: a transceiver; a memory configured to store instructions; and one or more processors communicatively coupled to the transceiver and the memory. The one or more processors are configured to execute the instructions to perform the operations of the methods described herein. In another aspect, an apparatus for wireless communication is provided, the apparatus comprising means for performing the operations of the methods described herein. In yet another aspect, a computer-readable medium is provided, the computer-readable medium comprising code executable by one or more processors to perform the operations of the methods described herein.

[0013] To achieve the foregoing and related ends, one or more aspects include the features fully described below and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail some illustrative features of one or more aspects. However, these features are merely indicative of some of the various ways in which the principles of the various aspects may be employed, and this specification is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The disclosed aspects will be described below in conjunction with the accompanying drawings, which are provided to illustrate rather than limit the disclosed aspects, wherein like numerals represent like elements, and in which:

[0015] Figure 1 An example of a wireless communication system according to various aspects of the present disclosure is illustrated;

[0016] Figure 2 is a diagram illustrating an example of a decomposed base station architecture according to various aspects of the present disclosure;

[0017] Figure 3 is a block diagram illustrating an example of a user equipment (UE) according to various aspects of the present disclosure;

[0018] Figure 4 is a block diagram illustrating an example of a base station according to various aspects of the present disclosure;

[0019] Figure 5 is a flow chart illustrating an example of a method for providing information for assisting in selecting a frequency on which to transmit a synchronization signal block (SSB) in accordance with various aspects described herein;

[0020] Figure 6 is a flow chart illustrating an example of a method for transmitting SSB on a frequency based on received information for assisting in selecting a frequency in accordance with various aspects described herein;

[0021] Figure 7illustrates an example of a timeline of selecting an SSB frequency over time in accordance with various aspects described herein; and

[0022] Figure 8 is a block diagram illustrating an example of a multiple-input multiple-output (MIMO) communication system including a base station and UEs according to aspects of the present disclosure. DETAILED DESCRIPTION

[0023] Various aspects are now described with reference to the accompanying drawings. In the following description, for the purpose of explanation, in order to provide a thorough understanding of one or more aspects, numerous specific details are described. However, it is apparent that such aspects can be practiced without these specific details.

[0024] The described features as a whole relate to selecting a frequency for sending a synchronization signal block (SSB) based on information received from one or more devices receiving the SSB. In some wireless communication technologies such as the fifth generation (5G) new radio (NR) or other third generation partnership project (3GPP) technologies, a network node may send an SSB to a device to allow the device to synchronize timing and / or frequency with the network node, receive broadcast information, etc. for establishing a connection with the device. For example, the SSB may include multiple synchronization signals, such as a primary synchronization signal (PSS), a secondary synchronization signal (SSS), a primary broadcast channel (PBCH), etc. In an example, the number of SSBs sent on different half-slots in 5G NR may be limited to a predefined time window duration (a 5 millisecond (ms) window is currently defined in the 5GNR specification) and may include an SSB burst of multiple SSBs. In this example, each SSB of the SSB burst may be associated with / sent with a different transmit beam used by the network node to scan / cover a cell range (in this way, beam scanning is done on the SSB).

[0025] SSB bursts may be sent periodically based on a periodicity defined in the 5G NR specification, such as 5ms, 10ms, 20ms, 40ms, 80ms, 160ms, etc. SSBs may be sent using an orthogonal frequency division multiplexing (OFDM) waveform and may use one or more of several parameter sets depending on the cell frequency. Depending on the parameter set used, a different number of SSBs (or beams) may be included in a single SSB burst. SSBs may be used by UEs residing within the coverage of a cell for several purposes, such as discovering a cell and residing / connecting to the cell (e.g., as part of an initial confirmation procedure), maintaining continuous time and frequency synchronization with the network, serving beams, and automatic gain control (AGC) tracking (e.g., in connected mode), maintaining serving cell and neighboring cell measurements to support mobility and handover procedures between cells, etc. SSB can be first detected by PSS sequence detection, where the UE can use the time division (TD) association of the received signal with multiple PSS signal hypotheses covering a multi-dimensional search space, which includes time, sequence (which corresponds to / correlated with the cell identifier (ID) used), frequency offset and beam. In some cases, SSB synchronization raster and parameter set hypotheses can also be used.

[0026] In sub-terahertz (SubTHz) scenarios, very wide bandwidths are desired to support high data rates. Wide bandwidths may limit the achievable flatness of the radio frequency (RF) components of the device. For example, a large peak-to-peak frequency domain response may result in a large operating frequency (e.g., up to 10 dB peak-to-peak frequency domain response at Fc=145 GHz), which may significantly affect the ability of the UE to connect to the cell when the SSB is allocated on a weak subcarrier. Thus, for example, the various aspects described herein may involve reducing the probability of SSBs being allocated on weak subcarriers, which may otherwise form large and constant frequency power variations, which may negatively affect the connected UE tracking loop performance. In some aspects, a network node may make an informed choice about which frequencies to allocate SSBs on based on a defined synchronization raster based on recommendations / reports from one or more devices.

[0027] For example, a device may send information to a network node, such as preferred frequencies for SSB, measurements of signals received on certain frequencies, etc., and the network node may select a frequency for sending the SSB accordingly based on the received information. This may result in an increase in the SSB signal to interference plus noise ratio (SINR) because the UE may receive the SSB on a desired frequency with a high measured (and / or reported) SINR. Additionally, allowing selection of the SSB frequency may allow for improved UE tracking loops by minimizing power variations on subcarriers. Furthermore, allowing selection of the SSB frequency may allow for improved throughput based on improved time / frequency tracking due to the use of frequencies that improve reception of the SSB.

[0028] The following will refer to Figures 1 to 8 The described features are presented in more detail.

[0029] As used in this application, the terms "component", "module", "system", etc. are intended to include computer-related entities, such as but not limited to hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a component can be, but not limited to: a process running on a processor, a processor, an object, an executable file, a thread of execution, a program, and / or a computer. By way of example, both an application running on a computing device and a computing device can be a component. One or more components may exist in a process and / or a thread of execution, and a component may be located in a computer and / or distributed between two or more computers. In addition, these components can be executed from various computer-readable media having various data structures stored thereon. Components may communicate by means of local and / or remote processes, such as according to signals having one or more data packets (such as data from a component as follows: the component interacts with another component in a local system, a distributed system, and / or interacts with other systems across a network such as the Internet).

[0030] The technology described herein can be used for various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA, single carrier FDMA and other systems. The terms "system" and "network" can often be used interchangeably. A CDMA system can implement radio technologies such as CDMA2000, Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 versions 0 and A are commonly referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is commonly referred to as CDMA2000 1xEV-DO, High Speed ​​Packet Data (HRPD), etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. A TDMA system can implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA system may implement radio technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDM TM Etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP Long Term Evolution (LTE) and Advanced LTE (LTE-A) are new versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents of an organization named "3rd Generation Partnership Project" (3GPP). CDMA2000 and UMB are described in documents of an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein can be used for the above-mentioned systems and radio technologies as well as other systems and radio technologies, including cellular (e.g., LTE) communications on shared radio frequency spectrum bands. However, the following description describes an LTE / LTE-A system for example purposes, and LTE terminology is used in most of the following descriptions, but these techniques can also be applied beyond LTE / LTE-A applications (e.g., to fifth generation (5G) new radio (NR) networks or other next generation communication systems).

[0031] The following description provides examples, but does not limit the scope, applicability or examples set forth in the claims. The functions and arrangements of the elements discussed may be changed without departing from the scope of the present disclosure. Various procedures or components may be omitted, replaced or added to each example as appropriate. For example, the described method may be performed in a different order than described, and various steps may be added, omitted or combined. In addition, the features described with respect to some examples may be combined in other examples.

[0032] Various aspects or features will be presented with respect to systems that may include multiple devices, components, modules, etc. It should be understood and appreciated that the various systems may include additional devices, components, modules, etc. and / or may not include all of the devices, components, modules, etc. discussed in conjunction with the figures. Combinations of these methods may also be used.

[0033] Figure 1 1 is a diagram illustrating an example of a wireless communication system and an access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) may include a base station 102, a UE 104, an evolved packet core (EPC) 160, and / or a 5G core (5GC) 190. The base station 102 may include a macro cell (a high-power cellular base station) and / or a small cell (a low-power cellular base station). The macro cell may include a base station. The small cell may include a femto cell, a pico cell, and a micro cell. In one example, the base station 102 may also include a gNB 180, as further described herein. In one example, in accordance with various aspects described herein, some nodes of the wireless communication system may have a modem 340 and a UE communication component 342 for generating and sending information for selecting a frequency for SSB transmission. In addition, in accordance with various aspects described herein, some nodes may have a modem 440 and a BS communication component 442 for receiving information for selecting a frequency for SSB transmission. Although UE 104 is shown as having a modem 340 and a UE communication component 342, and base station 102 / gNB 180 is shown as having a modem 440 and a BS communication component 442, this is an illustrative example, and substantially any node or type of node may include a modem 340 and a UE communication component 342 and / or a modem 440 and a BS communication component 442 to provide the corresponding functionality described herein.

[0034] The base station 102 configured for 4G LTE (which may be collectively referred to as the Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) may interface with the EPC 160 via a backhaul link 132 (e.g., using an S1 interface). The base station 102 configured for 5G NR (which may be collectively referred to as the Next Generation RAN (NG-RAN)) may interface with the 5GC 190 via a backhaul link 184. The base station 102 may perform one or more of the following functions, among other functions: transmission of user data, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, positioning, and delivery of warning messages. Base stations 102 may communicate with each other directly or indirectly (e.g., through EPC 160 or 5GC 190) over backhaul link 134 (e.g., using an X2 interface). Backhaul link 134 may be wired or wireless.

[0035] The base station 102 may communicate wirelessly with one or more UEs 104. Each of the base stations 102 may provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102' may have a coverage area 110' that overlaps with the coverage area 110 of one or more macro base stations 102. A network including both small cells and macro cells may be referred to as a heterogeneous network. A heterogeneous network may also include a home evolved Node B (eNB) (HeNB), which may provide services to a restricted group (which may be referred to as a closed subscriber group (CSG)). The communication link 120 between the base station 102 and the UE 104 may include an uplink (UL) (also referred to as a reverse link) transmission from the UE 104 to the base station 102 and / or a downlink (DL) (also referred to as a forward link) transmission from the base station 102 to the UE 104. The communication link 120 may use multiple input multiple output (MIMO) antenna technology, including spatial multiplexing, beamforming and / or transmit diversity. The communication link may be through one or more carriers. Base station 102 / UE 104 may use spectrum of up to Y MHz (e.g., 5 MHz, 10 MHz, 15 MHz, 20 MHz, 100 MHz, 400 MHz, etc.) bandwidth per carrier allocated in carrier aggregation for up to Yx MHz (e.g., corresponding to x component carriers) in total for transmission in the DL and / or UL direction. The carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric for DL ​​and UL (e.g., more or fewer carriers may be allocated for DL ​​than for UL). The component carriers may include a primary component carrier and one or more secondary component carriers. The primary component carrier may be referred to as a primary cell (PCell) and the secondary component carrier may be referred to as a secondary cell (SCell).

[0036] In another example, some UEs 104 may communicate with each other using a device-to-device (D2D) communication link 158. The D2D communication link 158 may use DL / UL WWAN spectrum. The D2D communication link 158 may use one or more sidelink channels, such as a physical sidelink broadcast channel (PSBCH), a physical sidelink discovery channel (PSDCH), a physical sidelink shared channel (PSSCH), and a physical sidelink control channel (PSCCH). The D2D communication may be through various wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on IEEE 802.11 standards, LTE, or NR.

[0037] The wireless communication system may also include a Wi-Fi access point (AP) 150 that communicates with a Wi-Fi station (STA) 152 via a communication link 154 in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) to determine whether the channel is available prior to communication.

[0038] The small cell 102' may operate in licensed and / or unlicensed spectrum. When operating in the unlicensed spectrum, the small cell 102' may employ NR and use the same 5 GHz unlicensed spectrum as the 5 GHz unlicensed spectrum used by the Wi-Fi AP 150. The small cell 102' employing NR in the unlicensed spectrum may improve the coverage of the access network and / or increase the capacity of the access network.

[0039] The base station 102 (whether a small cell 102' or a large cell (e.g., a macro base station)) may include an eNB, a gNodeB (gNB), or other types of base stations. Some base stations, such as gNB 180, may operate in traditional sub-6 GHz spectrum, millimeter wave (mmW) frequencies, and / or near mmW frequencies to communicate with UE 104. When the gNB 180 operates at mmW or near mmW frequencies, the gNB 180 may be referred to as a mmW base station. Extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 mm and 10 mm. The radio waves in this band may be referred to as millimeter waves. Near mmW can extend down to a frequency of 3 GHz and a wavelength of 100 mm. The super high frequency (SHF) band extends between 3 GHz and 30 GHz, which is also referred to as centimeter waves. Communications using the mmW / near mmW radio bands have extremely high path loss and short distances. The mmW base station 180 can use beamforming 182 with the UE 104 to compensate for the extremely high path loss and short distance. The base station 102 mentioned in this article can include a gNB 180.

[0040] The EPC 160 may include a mobility management entity (MME) 162, other MMEs 164, a serving gateway 166, a multimedia broadcast multicast service (MBMS) gateway 168, a broadcast multicast service center (BM-SC) 170, and a packet data network (PDN) gateway 172. The MME 162 may communicate with a home subscriber server (HSS) 174. The MME 162 is a control node that handles signaling between the UE 104 and the EPC 160. In general, the MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are passed through the serving gateway 166, which itself is connected to the PDN gateway 172. The PDN gateway 172 provides UE IP address allocation and other functions. The PDN gateway 172 and the BM-SC 170 are connected to IP services 176. The IP services 176 may include the Internet, an intranet, an IP multimedia subsystem (IMS), PS streaming services, and / or other IP services. The BM-SC 170 may provide functionality for MBMS user service configuration and delivery. The BM-SC 170 may serve as an entry point for content provider MBMS delivery, may be used to authorize and initiate MBMS bearer services in a public land mobile network (PLMN), and may be used to schedule MBMS delivery. The MBMS gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a multicast broadcast single frequency network (MBSFN) area that broadcasts a specific service, and may be responsible for session management (start / stop) and for collecting eMBMS-related billing information.

[0041] 5GC 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. AMF 192 may communicate with unified data management (UDM) 196. AMF 192 may be a control node that handles signaling between UE 104 and 5GC 190. Generally speaking, AMF 192 may provide QoS flow and session management. User Internet Protocol (IP) packets (e.g., from one or more UEs 104) may be transmitted through UPF 195. UPF 195 may provide UE IP address allocation and other functions for one or more UEs. UPF 195 is connected to IP services 197. IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), PS streaming services, and / or other IP services.

[0042] Base stations may also be referred to as gNBs, Node Bs, evolved Node Bs (eNBs), access points, base transceivers, radio base stations, radio transceivers, transceiver functions, basic service sets (BSSs), extended service sets (ESSs), transmit receive points (TRPs), or some other suitable terminology. Base station 102 provides an access point to EPC 160 or 5GC 190 for UE 104. Examples of UE 104 include cellular phones, smart phones, Session Initiation Protocol (SIP) phones, laptops, personal digital assistants (PDAs), satellite radios, global positioning systems, multimedia devices, video devices, digital audio players (e.g., MP3 players), cameras, game consoles, tablets, smart devices, wearable devices, vehicles, electric meters, gas pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or any other similarly functional devices. Some of UE 104 may be referred to as IoT devices (e.g., parking meters, gas pumps, toasters, vehicles, heart monitors, etc.). IoT UEs may include machine type communication (MTC) / enhanced MTC (eMTC, also referred to as Category (CAT)-M or Cat M1) UEs, NB-IoT (also referred to as CAT NB1) UEs, and other types of UEs. In the present disclosure, eMTC and NB-IoT may refer to future technologies that may evolve from or be based on these technologies. For example, eMTC may include FeMTC (further eMTC), eFeMTC (enhanced further eMTC), mMTC (massive MTC), etc., and NB-IoT may include eNB-IoT (enhanced NB-IoT), FeNB-IoT (further enhanced NB-IoT), etc. UE 104 may also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent, a mobile client, a client, or some other suitable terminology.

[0043] The deployment of a communication system (such as a 5G New Radio (NR) system) can be arranged with various components or constituent parts in a variety of ways. In a 5G NR system or network, a network node, a network entity, a mobility element of a network, a radio access network (RAN) node, a core network node, a network element or a network equipment (such as a base station (BS, e.g., BS102), or one or more units (or one or more components) that perform base station functionality can be implemented in an aggregated architecture or a decomposed architecture. For example, a BS (such as a Node B (NB), an evolved NB (eNB), an NR BS, a 5G NB, an access point (AP), a transmit receive point (TRP) or a cell, etc.) can be implemented as an aggregated base station (also referred to as an independent BS or a monolithic BS) or a decomposed base station.

[0044] 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 central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU).

[0045] 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 integrated access backhaul (IAB) network, an open radio access network (O-RAN (network configurations such as those initiated by the O-RAN Alliance)), or a virtualized radio access network (vRAN, also known as a cloud radio access network (C-RAN)). Decomposition may include distributing functionality across two or more units at various physical locations, as well as virtually distributing functionality of at least one unit, which may enable flexibility in network design. 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.

[0046] In an example, UE communication component 342 can provide information to base station 102 for selecting a frequency for SSB transmission, and / or BS communication component 442 can receive the information and select a frequency for SSB transmission accordingly. For example, the information can include an indication of a preferred frequency for SSB transmission determined by UE 104, signal measurements of signals received from base station 102 at one or more frequencies, and the like, and BS communication component 442 can determine the preferred frequency for SSB transmission based on these signal measurements. In an example, BS communication component 442 can transmit the SSB on the selected frequency, which can improve the quality of the SSB received at UE 104, improve UE tracking loop performance, and the like.

[0047] Figure 2 A diagram illustrating an example of a disaggregated base station 200 architecture is shown. The disaggregated base station 200 architecture may include one or more central units (CUs) 210 that may communicate directly with a core network 220 via a backhaul link, or indirectly with the core network 220 through one or more disaggregated base station units, such as a near real-time (near-RT) RAN intelligent controller (RIC) 225 via an E2 link, or a non-real-time (non-RT) RIC 215 associated with a service management and orchestration (SMO) framework 205, or both. The CU 210 may communicate with one or more distributed units (DUs) 230 via respective midhaul links, such as an F1 interface. The DU 230 may communicate with one or more radio units (RUs) 240 via respective fronthaul links. The RU 240 may communicate with respective UEs 104 via one or more radio frequency (RF) access links. In some implementations, a UE 104 may be served simultaneously by multiple RUs 240.

[0048] Each of the units (e.g., CU 210, DU 230, RU 240, and near-RT RIC 225, non-RT RIC 215, and SMO framework 205) may include 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 the 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, the unit may include a wired interface configured to receive or send signals to one or more of the other units on a wired transmission medium. Additionally, these units may include a wireless interface that may include a receiver, a transmitter, or a transceiver (such as a radio frequency (RF) transceiver) configured to receive or send signals, or both, to one or more of the other units on a wireless transmission medium.

[0049] In some aspects, CU 210 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 can be implemented using an interface that is configured to communicate signals with other control functions hosted by CU 210. CU210 may be configured to handle user plane functionality (i.e., central unit-user plane (CU-UP)), control plane functionality (i.e., central unit-control plane (CU-CP)), or a combination thereof. In some specific implementations, CU 210 may be logically split into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP unit may communicate bidirectionally with the CU-CP unit via an interface (such as an E1 interface). As needed, CU 210 may be implemented to communicate with DU 230 for network control and signaling.

[0050] DU 230 may correspond to a logical unit that includes one or more base station functions for controlling the operation of one or more RUs 240. In some aspects, DU 230 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 functional splits such as those defined by the Third Generation Partnership Project (3GPP). In some aspects, DU 230 may further host one or more low PHY layers. Each layer (or module) may be implemented using an interface that is configured to communicate signals with other layers (and modules) hosted by DU 230 or with control functions hosted by CU 210.

[0051] The lower layer functionality may be implemented by one or more RUs 240. In some deployments, a RU 240 controlled by a DU 230 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 240 may be implemented to handle over-the-air (OTA) communications with one or more UEs 104. In some implementations, real-time and non-real-time aspects of control plane and user plane communications with the RU 240 may be controlled by the corresponding DU 230. In some scenarios, this configuration may enable the implementation of the DU 230 and the CU 210 in a cloud-based RAN architecture (such as a vRAN architecture).

[0052] The SMO framework 205 may be configured to support RAN deployment and provisioning of non-virtualized network elements and virtualized network elements. For non-virtualized network elements, the SMO framework 205 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 205 may be configured to interact with a cloud computing platform (such as an open cloud (O-Cloud) 290) to perform network element lifecycle management (such as to instantiate virtualized network elements) via a cloud computing platform interface (such as an O2 interface). Such virtualized network elements may include, but are not limited to, CU 210, DU 230, RU 240, and near-RT RIC 225. In some specific implementations, the SMO framework 205 may communicate with hardware aspects of the 4G RAN (such as an open eNB (O-eNB) 211) via the O1 interface. Additionally, in some specific implementations, the SMO framework 205 may communicate directly with one or more RUs 240 via the O1 interface. The SMO framework 205 may also include a non-RT RIC 215 configured to support the functionality of the SMO framework 205 .

[0053] The non-RT RIC 215 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 225. The non-RT RIC 215 may be coupled to or in communication with the near-RT RIC 225 (such as via an A1 interface). The near-RT RIC 225 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 210, one or more DUs 230, or both, and the O-eNB with the near-RT RIC 225.

[0054] In some implementations, in order to generate an AI / ML model to be deployed in the near-RT RIC 225, the non-RT RIC 215 may receive parameters or external enrichment information from an external server. Such information may be utilized by the near-RT RIC 225 and may be received from a non-network data source or from a network function at the SMO framework 205 or the non-RT RIC 215. In some examples, the non-RT RIC 215 or the near-RT RIC 225 may be configured to tune RAN behavior or performance. For example, the non-RT RIC 215 may monitor long-term trends and patterns of performance and employ AI / ML models to perform corrective actions through the SMO framework 205 (such as via reconfiguration of O1) or via creation of RAN management policies (such as A1 policies).

[0055] In one example, the functionality described herein with respect to the base station 102 may be performed by one or more parts of the decomposed base station, such as one or more CUs 210, one or more DUs 230, one or more RUs 240, etc. For example, the CU 210 sets an SSB frequency for one or more DUs 230 or one or more RUs 240 to transmit the SSB based on information received by the CU 210 from the UE 104. In another example, the DU 230 may set an SSB frequency for one or more RUs 240 to transmit the SSB based on information received by the DU 230 from the UE 104, etc.

[0056] Now turn to Figures 3 to 8 , various aspects are described with reference to one or more components and one or more methods that can perform the actions or operations described herein, where aspects in dashed lines may be optional. Figures 5 and 6 The operations described in the description are presented in a particular order and / or as being performed by example components, but it should be understood that the ordering of the actions and the components that perform the actions may vary depending on the specific implementation. In addition, it should be understood that the following actions, functions, and / or components described may be performed by a specially programmed processor, a processor that executes specially programmed software or computer-readable media, or any other combination of hardware components and / or software components that are capable of performing the described actions or functions.

[0057] refer to Figure 3According to various aspects described herein, an example of a specific implementation of UE 104 may include various components, some of which have been described above and will be further described herein, including components such as one or more processors 312 and memory 316 and transceiver 302 that communicate via one or more buses 344, which can operate in conjunction with modem 340 and / or UE communication component 342 to generate and transmit information for selecting a frequency for SSB transmission.

[0058] In one aspect, the one or more processors 312 may include the modem 340 and / or may be part of the modem 340 using one or more modem processors. Thus, various functions associated with the UE communication component 342 may be included in the modem 340 and / or the processor 312, and in one aspect, may be performed by a single processor, while in other aspects, different ones of these functions may be performed by a combination of two or more different processors. For example, in one aspect, the one or more processors 312 may include a modem processor, or a baseband processor, or a digital signal processor, or a transmit processor, or a receiver processor, or any one or any combination of transceiver processors associated with the transceiver 302. In other aspects, some of the features of the one or more processors 312 and / or the modem 340 associated with the UE communication component 342 may be performed by the transceiver 302.

[0059] In addition, the memory 316 may be configured to store local versions of the data and / or applications 375 used herein, or one or more of the UE communication components 342 and / or its subcomponents executed by the at least one processor 312. The memory 316 may include any type of computer-readable medium that can be used by a computer or at least one processor 312, such as random access memory (RAM), read-only memory (ROM), tape, disk, optical disk, volatile memory, non-volatile memory, and any combination thereof. In one aspect, for example, when the UE 104 is operating at least one processor 312 to execute one or more of the UE communication components 342 and / or its subcomponents, the memory 316 may be a non-transitory computer-readable storage medium that stores one or more computer-executable codes and / or data associated therewith that define the UE communication components 342 and / or its subcomponents.

[0060] The transceiver 302 may include at least one receiver 306 and at least one transmitter 308. The receiver 306 may include hardware, firmware, and / or software code executable by a processor for receiving data, the code including instructions and stored in a memory (e.g., a computer-readable medium). The receiver 306 may be, for example, a radio frequency (RF) receiver. In one aspect, the receiver 306 may receive signals transmitted by at least one base station 102. Additionally, the receiver 306 may process such received signals and may also obtain measurements of these signals, such as but not limited to Ec / Io, signal-to-noise ratio (SNR), reference signal received power (RSRP), reference signal received quality (RSRQ), received signal strength indicator (RSSI), etc. The transmitter 308 may include hardware, firmware, and / or software code executable by a processor for transmitting data, the code including instructions and stored in a memory (e.g., a computer-readable medium). Suitable examples of the transmitter 308 may include, but are not limited to, an RF transmitter.

[0061] In addition, in an aspect, the UE 104 may include an RF front end 388 that may operate in communication with the one or more antennas 365 and the transceiver 302 to receive and transmit radio transmissions, such as wireless communications transmitted by at least one base station 102 or wireless transmissions transmitted by the UE 104. The RF front end 388 may be connected to the one or more antennas 365 and may include one or more low noise amplifiers (LNAs) 390, one or more switches 392, one or more power amplifiers (PAs) 398, and one or more filters 396 for transmitting and receiving RF signals.

[0062] In one aspect, the LNA 390 can amplify the received signal at a desired output level. In one aspect, each LNA 390 can have a specified minimum gain value and a maximum gain value. In one aspect, the RF front end 388 can use one or more switches 392 to select a particular LNA 390 and its specified gain value based on the desired gain value for a particular application.

[0063] In addition, for example, the RF front end 388 can use one or more PAs 398 to amplify the signal for RF output at a desired output power level. In one aspect, each PA 398 can have a specified minimum gain value and a maximum gain value. In one aspect, the RF front end 388 can use one or more switches 392 to select a particular PA 398 and its specified gain value based on a desired gain value for a particular application.

[0064] In addition, for example, the RF front end 388 can use one or more filters 396 to filter the received signal to obtain an input RF signal. Similarly, in one aspect, for example, the output from the corresponding PA 398 can be filtered using a corresponding filter 396 to produce an output signal for transmission. In one aspect, each filter 396 can be connected to a specific LNA 390 and / or PA 398. In one aspect, the RF front end 388 can use one or more switches 392 to select a transmit path or a receive path using a specified filter 396, LNA 390, and / or PA 398 based on a configuration as specified by the transceiver 302 and / or the processor 312.

[0065] Thus, the transceiver 302 may be configured to transmit and receive wireless signals through one or more antennas 365 via the RF front end 388 .

[0066] In an aspect, the transceiver may be tuned to operate at a specified frequency so that the UE 104 can communicate with, for example, one or more base stations 102 or one or more cells associated with the one or more base stations 102. In an aspect, for example, the modem 340 may configure the transceiver 302 to operate at a specified frequency and power level based on a UE configuration of the UE 104 and a communication protocol used by the modem 340.

[0067] In one aspect, the modem 340 may be a multi-band multi-mode modem that processes digital data and communicates with the transceiver 302 so that the digital data is transmitted and received using the transceiver 302. In one aspect, the modem 340 may be multi-band and configured to support multiple frequency bands for a specific communication protocol. In one aspect, the modem 340 may be multi-mode and configured to support multiple operating networks and communication protocols. In one aspect, the modem 340 may control one or more components (e.g., RF front end 388, transceiver 302) of the UE 104 to enable the sending and / or receiving of signals from the network based on a specified modem configuration. In one aspect, the modem configuration may be based on the mode of the modem and the frequency band used. In another aspect, the modem configuration may be based on UE configuration information associated with the UE 104 as provided by the network during cell selection and / or cell reselection.

[0068] In one aspect, according to aspects described herein, the UE communication component 342 may optionally include an information providing component 352 for providing information to a network node for assisting in selecting a frequency on which an SSB is to be transmitted, and / or an SSB processing component 354 for receiving and / or processing SSBs received from a network node.

[0069] In one aspect, processor 312 may correspond to combining Figure 8 Similarly, the memory 316 may correspond to one or more processors in conjunction with the UE described in the embodiment of the present invention. Figure 8 The memory described by the UE in.

[0070] refer to Figure 4 In accordance with various aspects described herein, an example of a specific implementation of a base station 102 (e.g., base station 102 and / or gNB 180 as described above) may include various components, some of which have been described above, but include components such as one or more processors 412 and memory 416 that communicate via one or more buses 444 and a transceiver 402, which may operate in conjunction with a modem 440 and a BS communication component 442 to receive information for selecting a frequency for SSB transmission.

[0071] The transceiver 402, receiver 406, transmitter 408, one or more processors 412, memory 416, applications 475, bus 444, RF front end 488, LNA 490, switch 492, filter 496, PA 498 and one or more antennas 465 may be the same as or similar to the corresponding components of UE 104 described above, but are configured or otherwise programmed for base station operation rather than UE operation.

[0072] In one aspect, BS communication component 442 can optionally include an information processing component 452 for receiving and / or processing information for assisting in selecting a frequency on which to transmit an SSB and / or an SSB component 454 for transmitting an SSB on a selected frequency in accordance with aspects described herein.

[0073] In one aspect, processor 412 may correspond to combining Figure 8 Similarly, the memory 416 may correspond to one or more processors in conjunction with the base station described in the embodiment of the present invention. Figure 8 The memory described in the base station.

[0074] Although various aspects are described herein in terms of a UE communicating with a network node (e.g., a base station or a decomposed portion thereof), the functionality may be similarly applied to UEs communicating using sidelink communications, wherein one UE (the sidelink transmitting UE) may perform the functionality of the network node described herein and a different UE (the sidelink receiving UE) may perform the functionality of the UE described herein.

[0075] Figure 5 A flow chart illustrating an example of a method 500 for providing information for assisting in selecting a frequency on which to transmit an SSB in accordance with various aspects described herein. Figure 6A flow chart illustrating an example of a method 600 for transmitting an SSB on a frequency based on received information for assisting in selecting a frequency in accordance with various aspects described herein. In one example, UE 104 may use Figure 1 and Figure 3 One or more of the components described in the method 500 may be used to perform the functions described in the method 500. In an example, a base station 102 (e.g., a gNB, a single-chip base station, or a portion of a decomposed base station, etc.) may use Figure 1 and Figure 4 One or more of the components described in the method 600 may be used to perform the functions described in the method 600. For ease of explanation, the methods 500 and 600 are described in conjunction with each other; however, the methods 500 and 600 need not be performed together and may in fact be performed independently using separate devices.

[0076] In method 500, at box 502, one or more parameters related to selecting a frequency for sending an SSB can be sent. In one aspect, the information providing component 352 (e.g., in combination with the processor 312, the memory 316, the transceiver 302, the UE communication component 342, etc.) can send one or more parameters related to selecting a frequency for sending an SSB. For example, the information providing component 352 can collect information about the one or more parameters or information used to determine the one or more parameters. In an example, the one or more parameters can include explicit recommendations about which frequencies can or should be used to allocate SSBs (e.g., from a given synchronization raster). In another example, the one or more parameters can include measurements collected by the UE for signals received at different frequencies, and the network node can select a desired frequency for sending the SSB based on these measurements.

[0077] In one example, the information providing component 352 can send the one or more parameters to the network node as part of a channel state information (CSI) feedback (CSF) report. For example, the CSF report can indicate the one or more parameters as measurements of a CSI reference signal (CSI-RS), a sounding reference signal (SRS), or other reference signal received from the network node at different frequencies of a synchronization raster. In another example, the CSF report can include parameters for the UE 104 to indicate one or more recommended frequencies for transmitting SSB (e.g., an added field or a reused field in the fields currently defined for CSF reports in 5G NR).

[0078] In method 600, at block 602, one or more parameters related to selecting a frequency for transmitting an SSB may be received. In one aspect, information processing component 452 (e.g., in conjunction with processor 412, memory 416, transceiver 402, BS communication component 442, etc.) may receive and / or process one or more parameters related to selecting a frequency for transmitting an SSB. For example, information processing component 452 may receive one or more parameters from UE 104, which may include explicit recommendations about which frequencies may or should be used to allocate SSBs, measurements collected by UE 104 for signals received at different frequencies, etc., and the network node may select a desired frequency for transmitting an SSB based on these measurements. In addition, in an example, information processing component 452 may receive one or more parameters in a CSF report from UE 104, which may specify measurements of CSI-RS, parameters for recommending one or more frequencies for SSB transmission, etc.

[0079] In one example, in the method 600, optionally, at block 604, information about a synchronization raster may be sent. In one aspect, the BS communication component 442 (e.g., in conjunction with the processor 412, the memory 416, the transceiver 402, etc.) may send (e.g., to the UE 104) information about the synchronization raster. For example, the information about the synchronization raster may include a frequency position of the synchronization raster (e.g., it may be used to send an SSB), a granularity of the synchronization raster (e.g., a frequency size between possible synchronization frequency allocations or channels, a number of frequency subcarriers, etc.), a size of a frequency allocation or channel, etc. In an example, the BS communication component 442 may use radio resource control (RRC) signaling such as a system information block (SIB) or other system information signaling to send information about the synchronization channel raster. In addition, in an example, the information about the synchronization channel raster may additionally or alternatively include information about a signal (e.g., CSI-RS, SRS, etc.) that is sent or allocated for sending on the synchronization channel raster, such as the frequency position of the signal.

[0080] In one example, in method 500, optionally, at box 504, information about a synchronization grating may be received. On the one hand, the UE communication component 342 (e.g., in combination with the processor 312, the memory 316, the transceiver 302, etc.) may receive (e.g., to the UE 104) information about the synchronization grating. For example, the information about the synchronization grating may include the frequency position of the synchronization grating, the granularity of the synchronization grating, the size of the frequency allocation or channel, etc. In the example, the UE communication component 342 may receive information about the synchronization channel grating using RRC signaling such as SIB or other system information signaling. In addition, in the example, the information about the synchronization channel grating may additionally or alternatively include information about a signal (e.g., CSI-RS, SRS, etc.) that is sent or allocated for transmission on the synchronization channel grating, such as the frequency position of the signal.

[0081] In one example, in method 600, optionally, at block 606, a signal may be sent on a synchronization raster. In one aspect, a BS communication component 442 (e.g., in conjunction with processor 412, memory 416, transceiver 402, etc.) may send a signal on a synchronization raster. For example, the BS communication component 442 may send SSB, CSI-RS, SRS, or other signals at various frequency positions in the synchronization raster and / or in certain time positions (e.g., as indicated in the information sent at block 604). For example, in order for a connected UE to perform measurements across the entire synchronization raster, the BS communication component 442 may allocate CSI-RS, SRS, etc. covering a frequency range of the synchronization raster or a frequency range corresponding to the synchronization raster. For example, the BS communication component 442 may send information about the synchronization raster as described above, send a reference signal allocation covering a frequency range corresponding to the synchronization raster (which may be in RRC signaling, MAC-CE, DCI, etc.), and send a reference signal at multiple frequencies in the frequency range based on the reference signal allocation.

[0082] In one example, in method 500, optionally, at block 506, a signal received on a synchronization raster may be measured. In one aspect, UE communication component 342 (e.g., in combination with processor 312, memory 316, transceiver 302, etc.) may receive a signal sent on a synchronization raster (e.g., SBS, CSI-RS, SRS, or other signal sent at a frequency position and / or time position of a synchronization raster as indicated in the information received at block 504). In one aspect, information providing component 352 (e.g., in combination with processor 312, memory 316, transceiver 302, UE communication component 342, etc.) may measure the signal received on the synchronization raster. In one example, information providing component 352 may provide a measurement of the signal to a network node (e.g., in a CSF report coupled to the CSI-RS). For example, UE communication component 342 can receive information about a synchronization raster as described above, receive a reference signal allocation (which can be in RRC signaling, MAC-CE, DCI, etc.) covering a frequency range corresponding to the synchronization raster, and receive reference signals at multiple frequencies in the frequency range based on the reference signal allocation. Information providing component 352 can measure the reference signal and / or use the reference signal to determine one or more preferred SSB frequencies, as described.

[0083] In another example, the information providing component 352 can generate or determine one or more recommendations for frequencies for SSB transmission based on comparing the measurements of the signal to one or more thresholds, comparing the measurements of the signal to each other (e.g., selecting the frequency with the highest signal measurement), etc., and can report the one or more recommended frequencies to the network node (e.g., in an added field or reuse field in a CSF report). In an example, these measurements can include substantially any signal power or quality measurement, such as RSRP, RSRQ, RSSI, SNR, etc. In an example, the information providing component 352 can collect measurements of reference signals received on multiple frequencies in a frequency range based on a reference signal allocation.

[0084] In another example, the network node may configure the UE to send an uplink pilot signal on a frequency range of or corresponding to a synchronization raster, such that the network node may receive the uplink pilot and use measurements of the uplink pilot to infer a frequency position for sending the SSB. For example, in method 600, optionally, at box 608, an uplink pilot signal configuration for a frequency range corresponding to the synchronization raster may be sent. On the one hand, the BS communication component 442 (e.g., in conjunction with the processor 412, the memory 416, the transceiver 402, etc.) may send (e.g., to one or more UEs 104) an uplink pilot signal configuration for a frequency range corresponding to the synchronization raster. For example, the uplink pilot signal configuration may include an indication of resources for sending an uplink pilot signal (e.g., a sounding reference signal (SRS)), such as along or according to a frequency position, a time position, etc. of a synchronization raster. In this regard, for example, receiving one or more parameters at block 602 may include receiving an uplink pilot signal from one or more UEs at a frequency position across a synchronization raster or a frequency range corresponding to the synchronization raster. The network node may then measure the uplink pilot signal (e.g., measure signal power or quality) to select a frequency for transmitting the SSB assuming channel reciprocity, as further described herein. In an example, the BS communication component 442 may send the configuration in RRC signaling, a medium access control (MAC)-control element (CE), downlink control information (DCI), etc.

[0085] In an example, in method 500, optionally, at block 508, an uplink pilot signal configuration for a frequency range corresponding to a synchronization raster may be received. On the one hand, the UE communication component 342 (e.g., in conjunction with the processor 312, the memory 316, the transceiver 302, etc.) may receive (e.g., from a network node) an uplink pilot signal configuration for a frequency range corresponding to a synchronization raster. For example, the uplink pilot signal configuration may include an indication of a resource for sending an uplink pilot signal (e.g., SRS), such as along or according to a frequency position, a time position, etc. of the synchronization raster. In this regard, for example, sending one or more parameters at block 502 may include an information providing component 352 sending an uplink pilot signal at a frequency position across the synchronization raster or a frequency range corresponding to the synchronization raster. The network node may then measure the uplink pilot signal (e.g., measure signal power or quality) to select a frequency for sending an SSB, as further described herein. In an example, the UE communication component 342 may receive a configuration in RRC signaling, MAC-CE, DCI, etc.

[0086] In method 600, at block 610, a frequency for transmitting the SSB may be selected based on the one or more parameters. In an aspect, SSB component 454 (e.g., in conjunction with processor 412, memory 416, transceiver 402, BS communication component 442, etc.) may select a frequency for transmitting the SSB based on the one or more parameters. For example, given one or more parameters as received from UE 104 and / or other UEs, SSB component 454 may select a frequency for transmitting the SSB using certain criteria or metrics based on the one or more parameters.

[0087] For example, in the event that one or more parameters include an explicit recommendation from UE 104 (and / or other UEs) as to which frequency or frequencies to allocate SSB (from a given synchronization raster), the SSB component 454 may select a frequency for transmitting the SSB based on a majority voting rule. For example, the SSB component 454 may determine, from one or more parameters received from the UE, which frequency is indicated as preferred by the greatest number of UEs. However, in an example, such a rule may not capture the performance degradation that may be experienced by UEs whose recommendations are not aligned with the selection. In one example, to account for this degradation, when selecting a frequency for transmitting the SSB, the SSB component 454 may apply a weight to the recommendation based on the distance between the network node and the corresponding UE. Thus, for example, the SSB component 454 may apply a higher weight to recommendations for cell edge UEs, which may be more sensitive to tracking loop performance.

[0088] For example, where the one or more parameters include measurements collected from UE 104 (and / or other UEs) and signaled to a network node, or where the one or more parameters include uplink pilots from which measurements are derived based on a channel reciprocity assumption, the SSB component 454 can select a frequency for transmitting the SSB based on the measurements to optimize a cell level metric, such as a sum rate, latency, energy consumption, etc. For example, the SSB component 454 can perform an optimization process that can take into account the quality of service (QoS) of different UEs and can select a frequency that avoids degrading the performance of each UE below a threshold (e.g., for a QoS requirement of a particular UE). For example, the SSB component 454 can select a frequency with at least a threshold reported measurement based on all UEs in the UE (or based on a highest percentage of UEs) and / or taking into account a particular QoS requirement of the UE 104, or can select a frequency that produces the highest cell level metric for the UE based on the measurements and / or taking into account a particular QoS requirement of the UE 104, etc.

[0089] Figure 7 An example of a timeline 700 of selecting an SSB frequency over time as further described herein is illustrated. Figure 7As shown in , for example, the synchronization raster may include frequencies F1, F2, and F3. At time T=T0, the SSB is assigned to F2. In one example, this assignment may be an initial assignment of SSB frequencies, which may be selected by the network node without information from the UE. At time T=T1, the network node may determine to switch the SSB frequency from F2 to F3, which may be based on information received from the UE. For example, the information may include signal measurements that, when considering measurements of all UEs or related to all UEs, may indicate F3 as a more desired frequency than F2. In another example, the information may include a recommendation from each UE for one or more frequencies preferred for SSB transmission. For example, the connected UEs may provide recommendations on which frequencies to allocate SSBs in the time span [T0, T1], which may be a majority vote on frequency F3. These recommendations may be made based on UE measurements, which may be based on CSI-RS or past SSB transmissions on different frequency allocations, etc., as described. At T1, the network node may reallocate the SSB to F3 based on a majority vote rule and / or may update the UE on the SSB allocation change, as further described herein. Between T1 and T2, the network may continue to collect UE recommendations or measurements again to see if the result of the vote or consideration of the collected measurements has changed. If so, and if Figure 7 As shown in , the network node may determine based on the recommendation or the collected measurements to reallocate the SSB to frequency F1 at time T=T2, as described.

[0090] In the method 600, optionally, at block 612, an indication of a frequency may be sent. In one aspect, the SSB component 454 (e.g., in conjunction with the processor 412, the memory 416, the transceiver 402, the BS communication component 442, etc.) may send an indication of a frequency. For example, the SSB component 454 may send the indication of the frequency to one or more UEs 104 in RRC signaling, MAC-CE, etc. In this example, based on a decision made at the network node regarding the SSB frequency allocation, the network node may reconfigure the UE with a new SSB frequency allocation from the configured SSB raster. The reconfiguration may be accomplished via RRC or MAC-CE, and the SSB frequency may be indicated as an indication of a frequency channel, an index of a frequency channel on a synchronization raster, etc.

[0091] In method 600, at block 614, the SSB can be sent on the frequency based on the one or more parameters. In an aspect, SSB component 454 (e.g., in conjunction with processor 412, memory 416, transceiver 402, BS communication component 442, etc.) can send the SSB on the frequency based on the one or more parameters (e.g., based on selecting a frequency based on the one or more parameters). For example, SSB component 454 can send multiple SSBs on the frequency for multiple time periods until another frequency can be configured using method 600.

[0092] In method 500, optionally, at block 510, an indication of a frequency can be received. In one aspect, SSB processing component 354 (e.g., in conjunction with processor 312, memory 316, transceiver 302, UE communication component 342, etc.) can receive an indication of a frequency. For example, SSB processing component 354 can receive an indication of a frequency from a network node in RRC signaling, MAC-CE, etc., which can be based on one or more parameters sent to the network node to assist in selecting a frequency. For example, SSB processing component 354 can receive this indication as an indication of a frequency channel, an index of a frequency channel on a synchronization raster, etc.

[0093] In method 500, at block 512, an SSB may be received on the frequency based on the one or more parameters. In one aspect, an SSB processing component 354 (e.g., in conjunction with processor 312, memory 316, transceiver 302, UE communication component 342, etc.) may receive an SSB on the frequency based on sending the one or more parameters. For example, the SSB processing component 354 may receive and / or process multiple SSBs on the frequency in multiple time periods until another frequency may be configured based on parameters from one or more UEs. At this point, the UE may receive the SSB on a frequency allocation desired for the UE to increase the likelihood of receiving the SSB on the cell, improve loop tracking for the UE, etc.

[0094] In an example, the UE may periodically and / or based on a request from the network node send the one or more parameters to the network node to continuously improve the SSB frequency used in a given scenario of the location of the connected UE. This may be done with a certain periodicity to be able to capture (slow) channel changes over time and to be able to address newly connected UEs or UEs whose connections have expired. For example, the SSB frequency allocation reconfiguration may be done with a high cycle time selected by the network node. For example, this cycle time may be kept greater than the SSB periodicity to reduce signaling overhead and allow unconnected UEs to successfully connect to the cell because they may need to combine multiple SSB occurrences. In an example, the network node may adjust this periodicity based on the underlying communication scenario (e.g., depending on the expected UE mobility within the cell or the frequency of occurrence of UE connection or disconnection from the cell, etc.). In an example, the network node may request signal measurements accordingly, request an indication of frequency preference, or configure an uplink pilot signal when the network node expects to reconfigure based on the underlying communication scenario.

[0095] For scenarios below THz, it is possible to assign SSB to the same frequency between adjacent cells because intra-cell interference will be negligible due to the strong path loss in this band. However, in this example, UEs located on or near the boundary of two adjacent cells at the cell edge may be negatively affected by interference. Thus, in the example, in method 600, optionally, at box 616, the frequency used for SSB can be indicated to another network node. On the one hand, the SSB component 454 (e.g., in combination with the processor 412, the memory 416, the transceiver 402, the BS communication component 442, etc.) can indicate the frequency used for SSB to another network node. For example, the SSB component 454 can indicate the frequency on the return signaling with other network nodes. At this point, another network node can avoid using the frequency used for its SSB transmission.

[0096] For example, after initially connecting to a cell, the UE 104 may update its frequency / time tracking loop based on the SSB signal to maintain its alignment with the network. The loop update may be based entirely on the SSB or may be based on an additional RS, such as a UE or cell-specific tracking reference signal (TRS). As described above, because the SSB SINR may depend on the allocation, the SSB frequency allocation selection may affect the UE tracking loop performance. When selecting the initial SSB frequency allocation, the network node may not consider the reception conditions of the SSB at the UE side. However, given a relatively constant channel response in a scenario below THz (e.g., low mobility plus line of sight (LOS) channel), as described herein, the SSB frequency allocation may be optimized to improve the reception conditions of the SSB at the connected UE. For example, a UE that has not yet been connected to a cell may also be affected by the SSB frequency allocation because the performance of the initial confirmation process (where the UE discovers the SSB through PSS sequence detection) is also SNR-dependent. Because the unconnected UE location and RF channel conditions are unknown to the network, the network node cannot consider this situation when selecting the initial SSB frequency and / or may assume that the average initial confirmation performance remains the same. In any case, as described herein, using the above functionality to periodically select an SSB frequency can improve SSB SINR and tracking loop for a variety of varying communication scenarios.

[0097] Figure 8 1 is a block diagram of a MIMO communication system 800 including a base station 102 and a UE 104. The MIMO communication system 800 may be exemplified with reference to Figure 1 The wireless communication access network 100 described herein may include various aspects of the wireless communication access network 100. The base station 102 may be a reference Figure 1 Examples of various aspects of the described base station 102. The base station 102 can be equipped with antenna 834 and antenna 835, and the UE 104 can be equipped with antenna 852 and antenna 853. In the MIMO communication system 800, the base station 102 can be able to transmit data over multiple communication links at the same time. Each communication link can be referred to as a "layer", and the "rank" of the communication link can indicate the number of layers used for communication. For example, in a 2x2 MIMO communication system in which the base station 102 sends two "layers", the rank of the communication link between the base station 102 and the UE 104 is two.

[0098] At the base station 102, a transmit (Tx) processor 820 may receive data from a data source. The transmit processor 820 may process data. The transmit processor 820 may also generate control symbols or reference symbols. The transmit MIMO processor 830 may perform spatial processing (e.g., pre-decoding) on ​​data symbols, control symbols, or reference symbols (if applicable), and may provide an output symbol stream to a transmit modulator / demodulator 832 and a modulator / demodulator 833. Each modulator / demodulator 832 to a modulator / demodulator 833 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator / demodulator 832 to a modulator / demodulator 833 may further process the output sample stream (e.g., convert the output sample stream into analog, amplify, filter, and up-convert) to obtain a DL signal. In an example, the DL signals from the modulator / demodulator 832 and the modulator / demodulator 833 may be transmitted via antenna 834 and antenna 835, respectively.

[0099] UE 104 may be a reference Figure 1 and Figure 3 Examples of various aspects of the UE 104 described herein. At the UE 104, the UE antenna 852 and the antenna 853 can receive DL signals from the base station 102 and can provide received signals to the modulator / demodulator 854 and the modulator / demodulator 855, respectively. Each modulator / demodulator 854 to the modulator / demodulator 855 can condition the corresponding received signal (e.g., filter, amplify, downconvert, and digitize the corresponding received signal) to obtain input samples. Each modulator / demodulator 854 to the modulator / demodulator 855 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 856 can obtain received symbols from the modulator / demodulator 854 and the modulator / demodulator 855, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. The receive (Rx) processor 858 may process (eg, demodulate, deinterleave, and decode) the detected symbols to provide decoded data for the UE 104 to a data output and to provide decoded control information to a processor 880 or memory 882 .

[0100] In some cases, processor 880 may execute stored instructions to instantiate UE communication component 342 (see, e.g., Figure 1 and Figure 3 ).

[0101] On the uplink (UL), at the UE 104, a transmit processor 864 may receive and process data from a data source. The transmit processor 864 may also generate reference symbols for reference signals. The symbols from the transmit processor 864 may be pre-decoded by a transmit MIMO processor 866 (if applicable), further processed by the modulator / demodulator 854 and the modulator / demodulator 855 (e.g., for single carrier FDMA, etc.), and transmitted to the base station 102 according to the communication parameters received from the base station 102. At the base station 102, the UL signal from the UE 104 may be received by the antennas 834 and 835, processed by the modulator / demodulator 832 and the modulator / demodulator 833, detected by the MIMO detector 836 (if applicable), and further processed by the receive processor 838. The receive processor 838 may provide decoded data to a data output and the processor 840 or the memory 842.

[0102] In some cases, processor 840 may execute stored instructions to instantiate BS communication component 442 (see, e.g., Figure 1 and Figure 4 ).

[0103] The components of the UE 104 may be implemented individually or collectively using one or more ASICs, wherein the one or more ASICs are adapted to perform some or all of the applicable functions in hardware. Each of the modules indicated may be a component for performing one or more functions related to the operation of the MIMO communication system 800. Similarly, the components of the base station 102 may be implemented individually or collectively using one or more application specific integrated circuits (ASICs), which are adapted to perform some or all of the applicable functions in hardware. Each of the components indicated may be a component for performing one or more functions related to the operation of the MIMO communication system 800.

[0104] The following aspects are merely illustrative, and aspects thereof may be combined with aspects of other embodiments or teachings described herein without limitation.

[0105] Aspect 1 is a method for wireless communication at a UE, comprising: sending one or more parameters related to a frequency selected by a network node for sending an SSB, and receiving the SSB from the network node on the frequency based on sending the one or more parameters.

[0106] In aspect 2, the method according to aspect 1 includes receiving an indication of the frequency based on sending the one or more parameters, wherein receiving the SSB is based on the indication of the frequency.

[0107] In aspect 3, the method of aspect 2 includes: wherein receiving the indication of the frequency is via one or more of MAC-CE or RRC signaling.

[0108] In aspect 4, the method according to any one of aspects 1 to 3 includes: wherein the one or more parameters include an indication of a preferred frequency for the SSB.

[0109] In aspect 5, the method according to any one of aspects 1 to 4 includes: wherein the one or more parameters include measurements collected by the UE on multiple frequencies in a synchronization raster for the SSB.

[0110] In aspect 6, the method according to aspect 5 includes receiving information about the synchronization raster in radio resource control (RRC) signaling.

[0111] In aspect 7, the method according to any one of aspects 5 or 6 includes: receiving a reference signal allocation covering a frequency range corresponding to the synchronization grating, and collecting the measurements of the reference signal received at multiple frequencies in the frequency range based on the reference signal allocation.

[0112] In aspect 8, the method according to aspect 7 includes: wherein the reference signal includes one or more of a CSI-RS or an SRS.

[0113] In aspect 9, the method according to any one of aspects 5 to 8 includes: wherein the one or more parameters include an indication of a preferred frequency for the SSB.

[0114] In aspect 10, the method according to any one of aspects 1 to 9 includes: wherein sending the one or more parameters is based on a first periodicity, the first periodicity being greater than a second periodicity used to send the SSB.

[0115] Aspect 11 is a method for performing wireless communications at a network node, comprising: receiving one or more parameters related to selecting a frequency for sending an SSB for one or more UEs; selecting the frequency for sending the SSB based on the one or more parameters; and sending the SSB on the frequency based on the one or more parameters.

[0116] In aspect 12, the method according to aspect 11 includes sending an indication of the frequency to the one or more UEs.

[0117] In aspect 13, the method of aspect 12 includes wherein sending the indication of the frequency is via one or more of MAC-CE or RRC signaling.

[0118] In aspect 14, the method according to any one of aspects 11 to 13 includes: wherein the one or more parameters include an indication of a preferred frequency for the SSB.

[0119] In aspect 15, the method according to aspect 14 includes: wherein selecting the frequency for transmitting the SSB is based on a preferred frequency having a highest number of indications among the one or more parameters received from multiple UEs.

[0120] In aspect 16, the method according to any one of aspects 14 or 15 includes: wherein the frequency for sending the SSB is selected based on a weighted average of the preferred frequencies indicated in the one or more parameters received from multiple UEs, wherein at least one of the preferred frequencies is weighted based on the distance between the network node and the corresponding UE indicating the at least one of the preferred frequencies.

[0121] In aspect 17, the method according to any one of aspects 11 to 16 includes: wherein the one or more parameters include measurements collected by the one or more UEs on multiple frequencies in a synchronization raster for the SSB.

[0122] In aspect 18, the method according to aspect 17 includes: wherein the frequency for transmitting the SSB is selected by optimizing a cell level metric based on the measurement.

[0123] In aspect 19, the method according to aspect 18 comprises: wherein the cell level metric is one or more of sum rate, latency or energy consumption.

[0124] In aspect 20, the method according to any one of aspects 17 to 19 includes: sending information about the synchronization raster in RRC signaling, sending a reference signal allocation covering a frequency range corresponding to the synchronization raster, and sending a reference signal on multiple frequencies in the frequency range based on the reference signal allocation.

[0125] In aspect 21, the method according to aspect 20 includes: wherein the reference signal includes one or more of a CSI-RS or an SRS.

[0126] In aspect 22, the method according to any one of aspects 17 to 21 includes: wherein the one or more parameters include an indication of a preferred frequency for the SSB.

[0127] In aspect 23, the method according to any one of aspects 11 to 22 includes: wherein sending the one or more parameters is based on a first periodicity, the first periodicity being greater than a second periodicity used to send the SSB.

[0128] In aspect 24, the method according to any one of aspects 11 to 23 comprises indicating the frequency used for the SSB to another network node.

[0129] Aspect 25 is an apparatus for wireless communication, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to perform any of the methods described in aspects 1 to 24.

[0130] Aspect 26 is an apparatus for wireless communication, comprising: means for performing any of the methods according to aspects 1 to 24.

[0131] Aspect 27 is a computer readable medium comprising code executable by one or more processors for wireless communication, the code comprising code for performing any of the methods according to aspects 1 to 24.

[0132] The above specific embodiments described above in conjunction with the accompanying drawings describe examples and do not represent the only examples that can be implemented or fall within the scope of the claims. The term "example" used in this specification means "used as an example, instance, or illustration", rather than "preferred" or "advantageous over other examples". The specific embodiments include specific details to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0133] Information and signals may be represented using any of a variety of different technologies and techniques. For example, the data, instructions, commands, information, signals, bits, symbols, and chips mentioned in the above description may be represented by voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or particles, computer executable codes or instructions stored on a computer-readable medium, or any combination thereof.

[0134] The various illustrative blocks and components described in conjunction with the disclosure herein may be implemented or executed using a specially programmed device, such as, but not limited to, a processor, a digital signal processor (DSP), an ASIC, a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, for performing the functions described herein. Although the specially programmed processor may be a microprocessor, in an alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. The specially programmed processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0135] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented with software executed by a processor, the functions may be stored as one or more instructions or codes on a non-transitory computer-readable medium or sent through it. Other examples and specific implementations fall within the scope and essence of the present disclosure and the appended claims. For example, due to the nature of software, the functions described above may be implemented using hardware, firmware, hard wiring, software executed by a specially programmed processor, or a combination of any of these items. The features of the implementation functions may also be physically located at different locations, including being distributed so that the various parts of the functions are implemented at different physical locations. In addition, as used herein, including in the claims, "or" used in a list of items such as "at least one of" indicates a dispersed list, so that, for example, a list of "at least one of A, B, or C" means A or B or C or AB or AC or BC or ABC (i.e., A and B and C).

[0136] Computer readable medium includes both computer storage medium and communication medium, and this communication medium includes any medium that promotes computer program to be transferred from one place to another place.Storage medium can be any available medium that can be accessed by general or special-purpose computer.By way of example and not limitation, computer readable medium can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage device, magnetic disk storage device or other magnetic storage device, or can be used for carrying or storing desired program code parts and any other medium that can be accessed by general or special-purpose computer or general or special-purpose processor in the form of instruction or data structure.Moreover, any connection is appropriately referred to as computer readable medium.For example, if software is to send from website, server or other remote source using coaxial cable, optical fiber cable, twisted pair, digital subscriber line (DSL) or wireless technology such as infrared, radio and microwave, then coaxial cable, optical fiber cable, twisted pair, DSL or wireless technology such as infrared, radio and microwave are included in the definition of medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk and Blu-ray disc, wherein disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer readable media.

[0137] The previous description of the present disclosure is provided to enable those skilled in the art to implement or use the present disclosure. It will be apparent to those of ordinary skill in the art that various modifications to the present disclosure will be apparent, and the general principles defined herein may be applied to other variations without departing from the essence or scope of the present disclosure. In addition, although the elements of the described aspects and / or embodiments are described or claimed in the singular, the plural form may also be envisioned unless explicitly stated to be limited to the singular. Additionally, unless otherwise stated, all or part of any aspect and / or embodiment may be used together with all or part of any other aspect and / or embodiment. Therefore, the present disclosure is not limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for wireless communication, comprising: processor; a memory coupled to the processor; and instructions stored in the memory and operable when executed by the processor to cause the apparatus to: transmitting one or more parameters related to a frequency selected by a network node for transmitting a synchronization signal block (SSB); as well as The SSB is received from the network node on the frequency based on sending the one or more parameters.

2. The apparatus of claim 1 , wherein the instructions, when executed by the processor, cause the apparatus to receive an indication of the frequency based on sending the one or more parameters, wherein the instructions, when executed by the processor, cause the apparatus to receive the SSB based on the indication of the frequency.

3. The device of claim 2, wherein the instructions, when executed by the processor, cause the device to receive the indication of the frequency via one or more of a medium access control (MAC) control element (CE) or a radio resource control (RRC) signaling.

4. The apparatus of claim 1, wherein the one or more parameters include an indication of a preferred frequency for the SSB.

5. The apparatus of claim 1, wherein the one or more parameters comprise measurements collected by the apparatus at multiple frequencies in a synchronization raster used for the SSB.

6. The apparatus of claim 5, wherein the instructions, when executed by the processor, cause the apparatus to receive information about the synchronization raster in radio resource control (RRC) signaling.

7. The apparatus of claim 5, wherein the instructions, when executed by the processor, cause the apparatus to: receiving a reference signal distribution covering a frequency range corresponding to the synchronization raster; and The measurements of reference signals received on a plurality of frequencies in the frequency range are collected based on the reference signal allocation.

8. The apparatus of claim 7, wherein the reference signal comprises one or more of a channel state information reference signal (CSI-RS) or a sounding reference signal (SRS).

9. The apparatus of claim 5, wherein the one or more parameters include an indication of a preferred frequency for the SSB.

10. The apparatus of claim 1, wherein the instructions, when executed by the processor, cause the apparatus to transmit the one or more parameters based on a first periodicity that is greater than a second periodicity used to transmit the SSB.

11. An apparatus for wireless communication, comprising: processor; a memory coupled to the processor; and instructions stored in the memory and operable when executed by the processor to cause the apparatus to: receiving, for one or more user equipment (UE), one or more parameters related to selecting a frequency for transmitting a synchronization signal block (SSB); selecting the frequency for transmitting the SSB based on the one or more parameters; as well as The SSB is transmitted on the frequency based on the one or more parameters.

12. The apparatus of claim 11, wherein the instructions, when executed by the processor, cause the apparatus to send an indication of the frequency to the one or more UEs.

13. The device of claim 12, wherein the instructions, when executed by the processor, cause the device to send the indication of the frequency via one or more of a medium access control (MAC) control element (CE) or a radio resource control (RRC) signaling.

14. The apparatus of claim 11, wherein the one or more parameters include an indication of a preferred frequency for the SSB.

15. The apparatus of claim 14, wherein the instructions, when executed by the processor, cause the apparatus to select the frequency for transmitting the SSB based on a preferred frequency having a highest number of indications among the one or more parameters received from a plurality of UEs.

16. The apparatus of claim 14, wherein the instructions, when executed by the processor, cause the apparatus to select the frequency for transmitting the SSB based on a weighted average of preferred frequencies indicated in the one or more parameters received from a plurality of UEs, wherein at least one of the preferred frequencies is weighted based on a distance between the apparatus and a corresponding UE indicating the at least one of the preferred frequencies.

17. The apparatus of claim 11, wherein the one or more parameters comprise measurements collected by the one or more UEs at multiple frequencies in a synchronization raster used for the SSB.

18. The apparatus of claim 17, wherein the instructions, when executed by the processor, cause the apparatus to select the frequency for transmitting the SSB by optimizing a cell level metric based on the measurements.

19. The apparatus of claim 18, wherein the cell level metric is one or more of sum rate, latency, or energy consumption.

20. The apparatus of claim 17, wherein the instructions, when executed by the processor, cause the apparatus to: sending information about the synchronization raster in radio resource control (RRC) signaling; transmitting a reference signal distribution covering a frequency range corresponding to the synchronization raster; and Reference signals are sent on a plurality of frequencies in the frequency range based on the reference signal allocation.

21. The apparatus of claim 20, wherein the reference signal comprises one or more of a channel state information reference signal (CSI-RS) or a sounding reference signal (SRS).

22. The apparatus of claim 17, wherein the one or more parameters include an indication of a preferred frequency for the SSB.

23. The apparatus of claim 11, wherein the instructions, when executed by the processor, cause the apparatus to transmit the one or more parameters based on a first periodicity that is greater than a second periodicity used to transmit the SSB.

24. The apparatus of claim 11, wherein the instructions, when executed by the processor, cause the apparatus to indicate the frequency used for the SSB to another network node.

25. A method for wireless communication at a user equipment (UE), comprising: transmitting one or more parameters related to a frequency selected by a network node for transmitting a synchronization signal block (SSB); as well as The SSB is received from the network node on the frequency based on sending the one or more parameters.

26. The method according to claim 25, further comprising: An indication of the frequency is received based on sending the one or more parameters, wherein receiving the SSB is based on the indication of the frequency.

27. The method of claim 25, wherein the one or more parameters include an indication of a preferred frequency for the SSB.

28. The method of claim 25, wherein the one or more parameters include measurements collected by the UE at multiple frequencies in a synchronization raster used for the SSB.

29. A method for wireless communication at a network node, comprising: receiving, for one or more user equipment (UE), one or more parameters related to selecting a frequency for transmitting a synchronization signal block (SSB); selecting the frequency for transmitting the SSB based on the one or more parameters; as well as The SSB is transmitted on the frequency based on the one or more parameters.

30. The method of claim 29, further comprising: An indication of the frequency is sent to the one or more UEs.

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