Method and apparatus for determining a search window and an SSB bitmap

Abstract

The UE is configured to determine a parameter set associated with receiving an SSB, the parameter set including a first parameter bitmap associated with a serving cell, a second parameter bitmap associated with a neighboring cell, and an SMTC. The UE is configured to determine a search window for searching for a received SSB based on the SMTC and at least one of the first parameter bitmap or the second parameter bitmap. The UE may measure the SSBs searched for during the determined search window and send measurement results associated with at least a subset of the measured SSBs to a base station. The UE may also prune measurements to generate the measurement results by removing measurements associated with SSBs received in time slots not indicated as desired SSBs based on the first parameter bitmap, the second first parameter bitmap, or the SMTC.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of U.S. Provisional Application No. 63 / 018,225, filed on April 30, 2020, entitled “METHOD AND APPARATUS FOR DETERMINING SEARCH WINDOW AND SSB BITMAP,” and U.S. Patent Application No. 17 / 244,708, filed on April 29, 2021, entitled “METHOD AND APPARATUS FOR DETERMINING SEARCH WINDOW AND SSB BITMAP,” the entire contents of which are expressly incorporated herein by reference. Technical Field

[0003] The present disclosure relates generally to communication systems, and more particularly, to a method of generating a synchronization signal block (SSB) bitmap and determining a search window for searching for the SSB. Background Art

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunication services, such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources. Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC FDMA) systems, and time division synchronous code division multiple access (TD-SCDMA) systems.

[0005] 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, and even global level. An example telecommunication standard is 5G New Radio (NR). 5G NR is part of the continuous mobile broadband evolution promulgated by the Third Generation Partnership Project (3GPP) to meet new requirements associated with latency, reliability, security, scalability (e.g., leveraging the Internet of Things (IoT)), and other requirements. 5G NR includes services associated with enhanced mobile broadband (eMBB), massive machine type communications (mMTC), and ultra-reliable low latency communications (URLLC). Some aspects of 5G NR may be based on the 4G Long Term Evolution (LTE) standard. 5G NR technology requires further improvement. These improvements may also be applicable to other multiple access technologies and telecommunication standards that employ these technologies. Summary of the Invention

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

[0007] In 5G NR, the search and measurement process performed by the UE is an important process for receiving signals. During one of the initial steps of the search and measurement process for receiving signals, the UE generates an SSB bitmap and determines a search window for searching for SSBs received from the serving cell and / or neighboring cells. To improve the mobility, power performance, and robustness of the UE and communications between the UE and the base station, improvements are needed to the process of generating the SSB bitmap and determining the search window.

[0008] In one aspect of the present disclosure, a method, a computer-readable medium, and an apparatus are provided. The apparatus may be a UE. The UE may determine a parameter set associated with receiving an SSB, the parameter set including a first parameter bitmap associated with a serving cell, a second parameter bitmap associated with a neighboring cell, and an SSB measurement timing configuration (SMTC). The UE may determine a search window for searching for a received SSB based on the SMTC and at least one of the first parameter bitmap P1 or the second parameter bitmap P2. The bits in each of the first parameter bitmap P1 and the second parameter bitmap P2 may indicate whether an SSB is expected in a particular time slot. The UE may then measure the SSBs searched for during the determined search window and send measurement results associated with at least a subset of the measured SSBs to a base station.

[0009] In one aspect, the at least one neighboring cell may be synchronized with the serving cell, and the search window may be determined based on an SSB bitmap based on each of the first parameter bitmap P1, the second parameter bitmap P2, and the SMTC. The SSB bitmap may be determined based on P1∪(P2∩SMTC). In another aspect, the at least one neighboring cell may not be synchronized with the serving cell, and the search window may be determined based on each of the first parameter bitmap P1 and the SMTC. The search window may be determined based on at least one of the first parameter bitmap P1 or the SMTC.

[0010] The UE may also be configured to prune measurements associated with SSBs that are not expected by certain cells. In one aspect, at least one neighboring cell may be synchronized with the serving cell and may prune measurements associated with the measured SSB by removing measurements associated with SSBs received from the serving cell in time slots not indicated as expected SSBs based on the first parameter bitmap P1, and removing measurements associated with SSBs received from the at least one neighboring cell in time slots not indicated as expected SSBs based on the intersection of the second parameter bitmap P2 and the SMTC (P2∩SMTC). On the other hand, at least one neighboring cell may not be synchronized with the serving cell and may prune measurements associated with the measured SSB by removing measurements associated with SSBs received from the serving cell in time slots not indicated as expected SSBs based on the first parameter bitmap P1, and removing measurements associated with SSBs received from the at least one neighboring cell in time slots not indicated as expected SSBs based on the second parameter bitmap P2.

[0011] To the accomplishment of the foregoing and related ends, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of but a few of the various ways in which the principles of the various aspects may be employed, and this description is intended to include all such aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a diagram illustrating an example of a wireless communication system and an access network.

[0013] Figure 2A 、 2B , 2C, and 2D are diagrams illustrating examples of a first 5G / NR frame, a DL channel within a 5G / NR subframe, a second 5G / NR frame, and a UL channel within a 5G / NR subframe, respectively.

[0014] Figure 3 is a diagram illustrating an example of a base station and a user equipment (UE) in an access network.

[0015] Figure 4A and 4B illustrates an example of SSB bitmap generation, and Figure 4C An example of the subtraction process is illustrated.

[0016] Figure 5A and 5B An example of determining a search window is illustrated.

[0017] Figure 6A and 6B An example of determining a search window is illustrated.

[0018] Figure 7A and 7B An example of determining a search window is illustrated.

[0019] Figure 8A and 8B An example of determining a search window is illustrated.

[0020] Figure 9 is a call graph of a method of wireless communication.

[0021] Figure 10A and 10B is a flow chart of a method of wireless communication.

[0022] Figure 11 is a diagram illustrating an example of a hardware implementation for an example apparatus. DETAILED DESCRIPTION

[0023] The detailed description set forth below in conjunction with the accompanying drawings is intended as a description of various configurations and is not intended to represent the only configuration in which the concepts described herein may be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of the various concepts. However, it will be apparent to those skilled in the art that these concepts may be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid obscuring these concepts.

[0024] Several aspects of telecommunications systems will now be presented with reference to various apparatuses and methods. These apparatuses and methods will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively, "elements"). These elements may be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0025] For example, an element, or any part of an element, or any combination of elements can be implemented as a "processing system" comprising one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems on a chip (SoCs), baseband processors, field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gating logic, discrete hardware circuits, and other suitable hardware configured to perform the various functions described throughout this disclosure. One or more processors in a processing system can execute software. Whether it involves software, firmware, middleware, microcode, hardware description language or other, software should be broadly interpreted as representing instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software components, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, processes, functions, etc.

[0026] Therefore, in one or more example embodiments, the functions described can be implemented in hardware, software, or any combination thereof. If implemented in software, the functions can be stored on a computer-readable medium, or encoded as one or more instructions or codes on a computer-readable medium. Computer-readable media include computer storage media. The storage medium can be any available medium that can be accessed by a computer. As an example and not limitation, such computer-readable media can include random access memory (RAM), read-only memory (ROM), electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, a combination of the aforementioned types of computer-readable media, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.

[0027] Although various aspects and implementations are described in this application by illustrating some examples, it will be understood by those skilled in the art that additional implementations and use cases may occur in many different arrangements and scenarios. The innovations herein may be implemented on many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, implementation and / or use may be carried out via integrated chip implementations and other non-module-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchase equipment, medical devices, devices supporting artificial intelligence (AI), etc.). Although some examples may or may not be specifically for use cases or applications, a wide range of classifications of the applicability of the described innovations may occur. The range of implementations may range from chip-level or modular components to non-modular, non-chip-level implementations, and further aggregate, distribute, or original equipment manufacturer (OEM) devices or systems incorporating one or more aspects of the described innovations. In some actual settings, the devices incorporating the described aspects and features may also include additional components and features for implementing and practicing the claimed and described embodiments. For example, the transmission and reception of wireless signals must include multiple components for both analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processor(s), interleavers, adders / summers, etc.) The innovations described herein are intended to be practiced in a wide variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc., of various sizes, shapes, and configurations.

[0028] Figure 1 1 is a diagram illustrating an example of a wireless communication system and access network 100. The wireless communication system (also referred to as a wireless wide area network (WWAN)) includes a base station 102, a UE 104, an evolved packet core (EPC) 160, and another core network 190 (e.g., a 5G core (5GC)). 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). A macro cell includes a base station. A small cell includes a femto cell, a pico cell, and a micro cell.

[0029] A base station 102 configured for 4G LTE (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 first backhaul link 132 (e.g., an S1 interface). A base station 102 configured for 5G NR (collectively referred to as the Next Generation RAN (NG-RAN)) may interface with the core network 190 via a second backhaul link 184. The base station 102 may perform one or more of the following functions, among other things: 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 device tracking, RAN information management (RIM), paging, positioning, and delivery of warning messages. Base stations 102 can communicate with each other directly or indirectly (eg, through EPC 160 or core network 190) via a third backhaul link 134 (eg, an X2 interface). First backhaul link 132, second backhaul link 184, and third backhaul link 134 can be wired or wireless.

[0030] Base stations 102 can communicate wirelessly with UEs 104. Each of base stations 102 can provide communication coverage for a corresponding geographic coverage area 110. There may be overlapping geographic coverage areas 110. For example, a small cell 102′ can have a coverage area 110′ that overlaps with the coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells can be referred to as a heterogeneous network. A heterogeneous network can also include Home evolved Node Bs (eNBs) (HeNBs), which can provide services to a restricted group called a Closed Subscriber Group (CSG). The communication link 120 between base station 102 and UE 104 can include uplink (UL) (also known as reverse link) transmissions from UE 104 to base station 102 and / or downlink (DL) (also known as forward link) transmissions from base station 102 to UE 104. The communication link 120 can use multiple-input multiple-output (MIMO) antenna technology, including spatial multiplexing, beamforming, and / or transmit diversity. The communication link can be over one or more carriers. Base station 102 / UE 104 can use up to Y MHz (e.g., 5, 10, 15, 20, 100, 400, etc. MHz) of bandwidth per carrier allocated in carrier aggregation for a total of up to Yx MHz (x component carriers) for transmission in each direction. The carriers may be adjacent to each other or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated for DL ​​compared to UL). 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).

[0031] Some UEs 104 may communicate with each other using device-to-device (D2D) communication links 158. The D2D communication links 158 may use the DL / UL WWAN spectrum. The D2D communication links 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 performed over various wireless D2D communication systems, such as, for example, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standard, LTE, or NR.

[0032] 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, for example, in the 5 GHz unlicensed spectrum. When communicating in the unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) prior to communication to determine whether the channel is available.

[0033] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can adopt NR and use the same unlicensed spectrum (e.g., 5 GHz, etc.) used by Wi-Fi AP 150. Small cell 102' adopting NR in unlicensed spectrum can improve coverage and / or increase capacity of the access network.

[0034] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, the two initial operating frequency bands are identified by the frequency range designations FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the "sub-6 GHz" band in various documents and articles. Although different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU), similar naming issues sometimes occur when referring to FR2, which is often (interchangeably) referred to as the "millimeter wave" band in various documents and articles.

[0035] Frequencies between FR1 and FR2 are generally referred to as mid-band frequencies. Recent 5G NR research has determined the operating frequency bands of these mid-band frequencies as the frequency range designation FR3 (7.125GHz-24.25GHz). The frequency bands falling within FR3 can inherit FR1 characteristics and / or FR2 characteristics, and therefore the features of FR1 and / or FR2 can be effectively extended to mid-band frequencies. In addition, higher frequency bands are currently being explored to extend 5G NR operation to above 52.6GHz. For example, three higher operating frequency bands have been identified as the frequency range designations FR4a or FR4-1 (52.6GHz-71GHz), FR4 (52.6GHz-114.25GHz), and FR5 (114.25GHz-300GHz). Each of these higher frequency bands falls within the EHF band.

[0036] With the foregoing in mind, unless otherwise specified, it should be understood that the term "sub-6 GHz," etc., if used herein, may broadly refer to frequencies that may be less than 6 GHz, may be within FR1, or may include mid-band frequencies. Furthermore, unless otherwise specified, it should be understood that the term "millimeter wave," etc., if used herein, may broadly refer to frequencies that may include mid-band frequencies, may be within FR2, FR4, FR4-a, FR4-1, and / or FR5, or may be within the EHF band.

[0037] Base station 102, whether a small cell 102' or a large cell (e.g., a macro base station), may include and / or be referred to as an eNB, a gNodeB (gNB), or another type of base station. Some base stations, such as gNB 180, may operate in the traditional sub-6 GHz spectrum, in millimeter wave frequencies, and / or near millimeter wave frequencies for communicating with UE 104. When gNB 180 operates at or near millimeter wave frequencies, gNB 180 may be referred to as a millimeter wave base station. Millimeter wave base station 180 may utilize beamforming 182 with UE 104 to compensate for path loss and short range. Base station 180 and UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming.

[0038] Base station 180 may transmit beamformed signals in one or more transmit directions 182′ to UE 104. UE 104 may receive beamformed signals from base station 180 in one or more receive directions 182″. UE 104 may also transmit beamformed signals in one or more transmit directions to base station 180. Base station 180 may receive beamformed signals in one or more receive directions from UE 104. Base station 180 / UE 104 may perform beam training to determine optimal receive and transmit directions for each of base station 180 / UE 104. The transmit and receive directions of base station 180 may or may not be the same. The transmit and receive directions of UE 104 may or may not be the same.

[0039] 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. MME 162 may communicate with a Home Subscriber Server (HSS) 174. MME 162 is a control node that handles signaling between UE 104 and EPC 160. Typically, MME 162 provides bearer and connection management. All user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which itself is connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Services 176. 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 provisioning and delivery. The BM-SC 170 may serve as the entry point for content providers' MBMS transmissions, may be used to authorize and initiate MBMS bearer services within a public land mobile network (PLMN), and may be used to schedule MBMS transmissions. The MBMS Gateway 168 may be used to distribute MBMS services to base stations 102 belonging to a Multicast Broadcast Single Frequency Network (MBSFN) area broadcasting a specific service, and may be responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0040] The core network 190 may include an access and mobility management function (AMF) 192, other AMFs 193, a session management function (SMF) 194, and a user plane function (UPF) 195. The AMF 192 may communicate with a unified data management (UDM) 196. The AMF 192 is a control node that handles signaling between the UE 104 and the core network 190. Typically, the AMF 192 provides QoS flow and session management. All user Internet Protocol (IP) packets are transmitted through the UPF 195. The UPF 195 provides UE IP address allocation and other functions. The UPF 195 is connected to the IP services 197. The IP services 197 may include the Internet, an intranet, an IP multimedia subsystem (IMS), packet switched (PS) streaming (PSS) services, and / or other IP services.

[0041] A base station may include and / or be referred to as a gNB, Node B, eNB, access point, base transceiver station, radio base station, radio transceiver, transceiver functionality, basic service set (BSS), extended service set (ESS), transmit reception point (TRP), or some other suitable terminology. Base station 102 provides an access point to EPC 160 or core network 190 for UE 104. Examples of UE 104 include a cellular phone, a smartphone, a Session Initiation Protocol (SIP) phone, a laptop, a personal digital assistant (PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (e.g., an MP3 player), a camera, a game console, a tablet, a smart device, a wearable device, a vehicle, an electric meter, a gas pump, a large or small kitchen appliance, a healthcare device, an implant, a sensor / actuator, a display, or any other similarly functional device. Some of UE 104 may be referred to as IoT devices (e.g., a parking meter, a gas pump, a toaster, a vehicle, a heart monitor, 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.

[0042] Reference again Figure 1 In certain aspects, the UE 104 may include an SSB bitmap and search window component 198 configured to determine a parameter set associated with a received SSB, the parameter set including at least one of a first parameter bitmap P1 associated with a serving cell, a second parameter bitmap P2 associated with at least one neighboring cell, or an SMTC, determine a search window for searching for the received SSB based on the SMTC and at least one of the first parameter bitmap P1 or the second parameter bitmap P2, measure the SSBs searched for during the determined search window, and transmit measurement results associated with at least a subset of the measured SSBs to a base station. Although the following description may focus on 5G NR, the concepts described herein may be applicable to other similar fields, such as LTE, LTE-A, CDMA, GSM, and other wireless technologies.

[0043] Figure 2A FIG200 is a diagram illustrating an example of a first subframe within a 5G NR frame structure. Figure 2B 230 is a diagram illustrating an example of DL channels within a 5G NR subframe. Figure 2C 250 is a diagram illustrating an example of a second subframe within a 5G NR frame structure. Figure 2D280 is a diagram illustrating an example of UL channels within a 5G NR subframe. The 5G NR frame structure may be frequency division duplex (FDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to either DL or UL, or may be time division duplex (TDD), where for a particular set of subcarriers (carrier system bandwidth), subframes within that subcarrier set are dedicated to both DL and UL. Figure 2A 、 2C In the example provided, it is assumed that the 5G NR frame structure is TDD, subframe 4 is configured with slot format 28 (primarily DL), where D is DL, U is UL, and F is flexible between DL / UL, and subframe 3 is configured with slot format 1 (all UL). Although subframes 3 and 4 are shown with slot formats 1 and 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are DL and UL, respectively. Other slot formats 2-61 include a mix of DL, UL and flexible symbols. The UE is configured with the slot format via a received slot format indicator (SFI) (dynamically via DL control information (DCI), or semi-statically / statically via radio resource control (RRC) signaling). Note that the description below also applies to the 5G NR frame structure for TDD.

[0044] Figures 2A-2D The frame structure is illustrated, and aspects of the present disclosure are applicable to other wireless communication technologies that may have different frame structures and / or different channels. A frame (10 ms) can be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. A subframe may also include mini-slots, which may include 7, 4, or 2 symbols. Each time slot may include 7 or 14 symbols, depending on whether the cyclic prefix (CP) is normal or extended. For a normal CP, each time slot may include 14 symbols, while for an extended CP, each time slot may include 7 symbols. The symbols on the DL may be CP orthogonal frequency division multiplexing (OFDM) (CP-OFDM) symbols. The symbols on the UL may be CP-OFDM symbols (for high throughput scenarios) or discrete Fourier transform (DFT) spread OFDM (DFT-s-OFDM) symbols (also known as single carrier frequency division multiple access (SC-FDMA) symbols) (for power-limited scenarios; limited to single stream transmission). The number of time slots within a subframe is based on the CP and parameter set. The parameter set defines the subcarrier spacing (SCS) and effectively defines a symbol length / duration equal to 1 / SCS.

[0045]

[0046] For normal CP (14 symbols / slot), different parameter sets μ0 to 4 allow 1, 2, 4, 8, and 16 slots per subframe, respectively. For extended CP, parameter set 2 allows 4 slots per subframe. Thus, for normal CP and parameter set μ, there are 14 symbols / slot and 2 μ timeslot / subframe. The subcarrier spacing can be equal to 2 μ *15kHz, where μ is parameter set 0 to 4. Thus, parameter set μ=0 has a subcarrier spacing of 15kHz, and parameter set μ=4 has a subcarrier spacing of 240kHz. Symbol length / duration is inversely related to subcarrier spacing. Figures 2A-2D An example of a normal CP of 14 symbols per slot and a parameter set μ=2 of 4 slots per subframe is provided. The slot duration is 0.25 ms, the subcarrier spacing is 60 kHz, and the symbol duration is approximately 16.67 μs. Within a set of frames, there may be one or more different bandwidth parts (BWPs) of frequency division multiplexing (see Figure 2B ). Each BWP can have a specific parameter set and CP (normal or extended).

[0047] The resource grid can be used to represent the frame structure. Each time slot includes a resource block (RB) (also called a physical RB (PRB)) that extends over 12 consecutive subcarriers. The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0048] like Figure 2A As shown, some of the REs carry reference (pilot) signals (RS) for the UE. The RSs may include a demodulation RS (DM-RS) (indicated as R for one specific configuration, but other DM-RS configurations are possible) and a channel state information reference signal (CSI-RS) for channel estimation at the UE. The RSs may also include a beam measurement RS (BRS), a beam refinement RS (BRRS), and a phase tracking RS (PT-RS).

[0049] Figure 2BThe figure illustrates examples of various DL channels within a subframe of a frame. The physical downlink control channel (PDCCH) carries DCI within one or more control channel elements (CCEs) (e.g., 1, 2, 4, 8, or 16 CCEs), each CCE comprising six RE groups (REGs), each REG comprising 12 consecutive REs in an OFDM symbol of an RB. The PDCCH within a BWP may be referred to as a control resource set (CORESET). The UE is configured to monitor PDCCH search spaces (e.g., common search space, UE-specific search space) during PDCCH monitoring opportunities on the CORESET for PDCCH candidates, where the PDCCH candidates have different DCI formats and different aggregation levels. Additional BWPs may be located at higher and / or lower frequencies across the channel bandwidth. The primary synchronization signal (PSS) may be within symbol 2 of a specific subframe of a frame. The UE 104 uses the PSS to determine subframe / symbol timing and physical layer identity. The secondary synchronization signal (SSS) may be within symbol 4 of a specific subframe of a frame. The UE uses the SSS to determine the physical layer cell identity group number and the radio frame timing. Based on the physical layer identity and the physical layer cell identity group number, the UE can determine the physical cell identifier (PCI). Based on the PCI, the UE can determine the position of the aforementioned DM-RS. The physical broadcast channel (PBCH) carrying the master information block (MIB) can be logically grouped using the PSS and SSS to form a synchronization signal (SS) / PBCH block (also known as an SS block (SSB)). The MIB provides multiple RBs in the system bandwidth and a system frame number (SFN). The physical downlink shared channel (PDSCH) carries user data, broadcast system information such as the system information block (SIB) that is not sent through the PBCH, and paging messages.

[0050] like Figure 2C As shown, some of the REs carry DM-RSs for channel estimation at the base station (indicated as R for one specific configuration, but other DM-RS configurations are possible). The UE can send DM-RSs for the physical uplink control channel (PUCCH) and DM-RSs for the physical uplink shared channel (PUSCH). The PUSCH DM-RS can be sent in the first one or two symbols of the PUSCH. Depending on whether a short PUCCH or a long PUCCH is sent, and depending on the specific PUCCH format used, the PUCCH DM-RS can be sent in different configurations. The UE can send a sounding reference signal (SRS). The SRS can be sent in the last symbol of the subframe. The SRS can have a comb structure, and the UE can send the SRS on one of these combs. The base station can use this SRS for channel quality estimation to achieve frequency-dependent scheduling on the UL.

[0051] Figure 2DThe diagram illustrates examples of various UL channels within a subframe of a frame. The PUCCH may be positioned as indicated in a configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and hybrid automatic repeat request (HARQ) acknowledgement (ACK) (HARQ-ACK) feedback (i.e., one or more HARQ ACK bits indicating one or more ACKs and / or negative ACKs (NACKs)). The PUSCH carries data and may additionally be used to carry buffer status reports (BSRs), power headroom reports (PHRs), and / or UCI.

[0052] Figure 3 3 is a block diagram of a base station 310 communicating with a UE 350 in an access network. In the DL, IP packets from the EPC 160 may be provided to a controller / processor 375. The controller / processor 375 implements Layer 3 and Layer 2 functions. Layer 3 includes a radio resource control (RRC) layer, and Layer 2 includes a service data adaptation protocol (SDAP) layer, a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a medium access control (MAC) layer. The controller / processor 375 provides RRC layer functions associated with broadcasting of system information (e.g., MIB, SIB), RRC connection control (e.g., RRC connection paging, RRC connection establishment, RRC connection modification, and RRC connection release), inter-radio access technology (RAT) mobility, and measurement configuration for UE measurement reporting; PDCP layer functions associated with header compression / decompression, security (ciphering, deciphering, integrity protection, integrity verification), and handover support functions; RLC layer functions associated with transmission of upper layer packet data units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs to transport blocks (TBs), demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel prioritization.

[0053] The transmit (TX) processor 316 and receive (RX) processor 370 implement Layer 1 functions associated with various signal processing functions. Layer 1, including the physical (PHY) layer, may include error detection on the transport channel, forward error correction (FEC) encoding / decoding of the transport channel, interleaving, rate matching, mapping onto the physical channel, modulation / demodulation of the physical channel, and MIMO antenna processing. The TX processor 316 handles the mapping to the signal constellation based on various modulation schemes (e.g., binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), M-phase shift keying (M-PSK), M-quadrature amplitude modulation (M-QAM)). The coded and modulated symbols can then be split into parallel streams. Each stream can then be mapped to an OFDM subcarrier, multiplexed with a reference signal (e.g., a pilot) in the time and / or frequency domain, and then combined using an inverse fast Fourier transform (IFFT) to produce a physical channel carrying a time-domain OFDM symbol stream. The OFDM stream is spatially precoded to produce multiple spatial streams. Channel estimates from a channel estimator 374 may be used to determine coding and modulation schemes, as well as for spatial processing. The channel estimates may be derived from a reference signal and / or channel condition feedback transmitted by the UE 350. Each spatial stream may then be provided to a different antenna 320 via a separate transmitter 318TX. Each transmitter 318TX may modulate a radio frequency (RF) carrier with a corresponding spatial stream for transmission.

[0054] At the UE 350, each receiver 354RX receives a signal through its corresponding antenna 352. Each receiver 354RX recovers the information modulated onto the RF carrier and provides the information to a receive (RX) processor 356. The TX processor 368 and the RX processor 356 implement layer 1 functions associated with various signal processing functions. The RX processor 356 can perform spatial processing on the information to recover any spatial streams destined for the UE 350. If multiple spatial streams are destined for the UE 350, they can be combined into a single OFDM symbol stream by the RX processor 356. The RX processor 356 then converts the OFDM symbol stream from the time domain to the frequency domain using a fast Fourier transform (FFT). The frequency domain signal includes a separate OFDM symbol stream for each subcarrier of the OFDM signal. The symbols on each subcarrier and the reference signal are recovered and demodulated by determining the most likely signal constellation point sent by the base station 310. These soft decisions can be based on the channel estimates calculated by the channel estimator 358. The soft decisions are then decoded and deinterleaved to recover the data and control signals originally sent on the physical channel by base station 310. The data and control signals are then provided to a controller / processor 359, which implements Layer 3 and Layer 2 functionality.

[0055] The controller / processor 359 may be associated with a memory 360 that stores program codes and data. The memory 360 may be referred to as a computer-readable medium. In the UL, the controller / processor 359 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the EPC 160. The controller / processor 359 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0056] Similar to the functions described in conjunction with the DL transmission of the base station 310, the controller / processor 359 provides RRC layer functions associated with system information (e.g., MIB, SIB) acquisition, RRC connection, and measurement reporting; PDCP layer functions associated with header compression / decompression, and security (encryption, decryption, integrity protection, integrity checking); RLC layer functions associated with transmission of upper layer PDUs, error correction through ARQ, concatenation, segmentation, and reassembly of RLC SDUs, resegmentation of RLC data PDUs, and reordering of RLC data PDUs; and MAC layer functions associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs to TBs, demultiplexing of MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, priority handling, and logical channel priority.

[0057] The TX processor 368 may select an appropriate coding and modulation scheme and facilitate spatial processing using channel estimates derived by the channel estimator 358 from a reference signal or feedback transmitted by the base station 310. The spatial streams generated by the TX processor 368 may be provided to different antennas 352 via separate transmitters 354TX. Each transmitter 354TX may modulate an RF carrier with a corresponding spatial stream for transmission.

[0058] At the base station 310, the UL transmission is processed in a manner similar to that described in conjunction with the receiver functionality at the UE 350. Each receiver 318RX receives a signal through its respective antenna 320. Each receiver 318RX recovers information modulated onto an RF carrier and provides the information to an RX processor 370.

[0059] The controller / processor 375 may be associated with a memory 376 that stores program codes and data. The memory 376 may be referred to as a computer-readable medium. In the UL, the controller / processor 375 provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, and control signal processing to recover IP packets from the UE 350. The IP packets from the controller / processor 375 may be provided to the EPC 160. The controller / processor 375 is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.

[0060] At least one of the TX processor 368, the RX processor 356, and the controller / processor 359 may be configured to perform operations related to Figure 1 198 related aspects.

[0061] 5G NR may include a search and measurement process for sub-6 GHz (Sub6) spectrum and millimeter wave spectrum. The search and measurement process may include determining a search window and an SSB bitmap as one of the initial steps. That is, in 5G NR, the UE may receive an SSB and perform a process of generating an SSB bitmap and determining a search window, which may be part of searching and measuring candidate signals for synchronization and configuration of a communication link with a base station. The process of determining the search window and SSB bitmap may affect the mobility performance, power performance, and robustness of the UE. That is, improving the scheme for generating an SSB bitmap and determining the search window of the UE may improve the performance and robustness of the UE, which may also improve the reliability of the communication link. The UE may rely on various parameters configured in the network (NW) to determine the search window and SSB bitmap. In one aspect, the first parameter, ssb_PositionsInBurst, may indicate the time domain position of the active SSB in the SS burst set of the serving cell. On the other hand, the second parameter, ssb_ToMeasure, may indicate the time domain position of the active SSB in the SS burst set of at least one neighboring cell. In another aspect, the base station may provide the SMTC period to the UE.

[0062] The ssb_PositionsInBurst parameter may be a bitmap indicating the SSBs broadcast by the UE's serving cell. The ssb_ToMeasure parameter may be a bitmap indicating the SSBs broadcast by one or more neighboring cells of the UE. The SMTC may specify a time domain window having a duration and a position for the UE to detect and measure at least one cell, the at least one cell including the UE's serving cell and one or more neighboring cells. That is, the UE may measure the cell within the SMTC period or window. For example, the SMTC may have the following attributes: an SMTC window duration of 1, 2, 3, 4, or 5 ms; an SMTC periodicity of 5, 10, 20, 40, 80, or 160 ms; and an SMTC window timing offset of 0, 1, ..., or (SMTC periodicity-1) ms.

[0063] The search window and SSB bitmap in the UE may cover all SSBs from the UE's serving cell and neighboring cells, and the duration of the search window may be reduced to save power of the UE or improve power management of the UE. In one aspect, the NW including the base station may configure the ssb_ToMeasure parameter and / or the SMTC parameter. On the other hand, the NW may not configure ssb_ToMeasure and / or SMTC, and the UE may not receive ssb_ToMeasure and / or SMTC from the base station. If ssb_ToMeasure is not configured by the base station, the UE may assume that all SSBs may need to be measured. If SMTC is not configured by the base station, the UE may assume that the maximum duration of the SMTC window is 5ms. However, such assumptions may result in power inefficiency in the UE. That is, by simply assuming that all SSBs may need to be measured and that the SMTC window has a maximum length of 5ms, the UE's search and measurement process may not be efficient, which may result in increased power consumption in the UE.

[0064] refer to Figure 1 198, the UE may implement certain relationships between ssb_PositionsInBurst, ssb_ToMeasure and SMTC. In some aspects, the SMTC may cover all SSBs (ssb_PositionsInBurst and ssb_ToMeasure) broadcast by the NW cell, including the UE's serving cell and one or more neighboring cells. However, the UE may also need to cover the ssb_PositionInBurst and ssb_ToMeasureSSBs configured by the NW and not covered by the SMTC period. That is, the SMTC configured by the NW may not cover all SSBs indicated by the ssb_PositionInBurst parameter and the ssb_ToMeasure parameter, and the UE may implement an algorithm to cover the SSBs that are not covered by the SMTC but are indicated by the ssb_PositionInBurst parameter and the ssb_ToMeasure parameter. Therefore, the UE may generate an SSB bitmap as (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC) and determine a search window based on the generated SSB bitmap. The search window may extend from the first time slot indicated in the SSB bitmap for measuring the SSB to the last time slot indicated in the SSB bitmap for measuring the SSB.

[0065] According to certain aspects of the present disclosure, a UE can reduce performance degradation and search failures despite misleading NW configurations. That is, aspects of the present disclosure can provide a more robust design for a UE, which can improve UE performance and avoid search failures that may be caused by poor NW configurations. Examples illustrating various aspects of addressing the potential issues described above are provided below.

[0066] In certain aspects, the UE may determine the search window and / or SSB bitmap based on available information provided by the NW to improve the performance of the UE and the robustness of the overall network environment.

[0067] Figure 4A and 4B Examples 402 and 404 of SSB bitmap generation are illustrated, and Figure 4C An example of a pruning process 406 is illustrated. Figure 4A 、 4B The examples in Figures 4 and 4C may illustrate a sub-6 GHz spectrum signal configured with a 30 kHz subcarrier spacing, and may include two time slots per 1 ms. However, the embodiments are not necessarily limited thereto, and any format or configuration parameter set and subcarrier spacing of 5G / NR may be implemented as long as it is applicable.

[0068] Figure 4A 、 4B Examples 402, 404, and 406 of 4C illustrate that the serving cell and one or more neighboring cells may be synchronized with each other. The base station may signal the UE to indicate that the network including the serving cell and one or more neighboring cells is a synchronized network. For example, the base station may signal "deriveSSB-IndexFromCell=true" to the UE in a system information block type 2 (SIB2) to indicate that the network is synchronized. The serving cell and one or more neighboring cells are synchronized with each other, and the boundaries of the frames or time slots of the signals from the serving cell and the one or more neighboring cells may be aligned in time. Therefore, the UE may generate an SSB bitmap based on ssb_PositionInBurst, ssb_ToMeasure, and / or the SMTC period.

[0069] In some aspects, the UE may generate an SSB bitmap based on ssb_PositionInBurst, ssb_ToMeasure, and SMTC. The UE may receive ssb_PositionInBurst, ssb_ToMeasure, and SMTC in SIB2 from the base station. ssb_PositionInBurst may be configured by the NW, and ssb_ToMeasure or SMTC may optionally be configured by the NW. The UE may determine ssb_PositionInBurst, ssb_ToMeasure, and SMTC based on the configuration of ssb_PositionInBurst, ssb_ToMeasure, and SMTC in SIB2. The NW may not configure ssb_ToMeasure and SMTC, and the UE may determine ssb_ToMeasure and SMTC based on pre-configured rules.

[0070] The UE may generate the SSB bitmap as (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC), and the search window may extend from the first time slot indicated in the SSB bitmap for measuring the SSB to the last time slot indicated in the SSB bitmap for measuring the SSB. Therefore, the search window may be determined as SMTC±x time slots.

[0071] The intersection of ssb_ToMeasure and SMTC (ssb_ToMeasure∩SMTC) can specify that SSBs from neighboring cells that are outside the applicable SMTC will not be measured. The intersection operation can cover SSBs broadcast by neighboring cells while minimizing the window duration to reduce power consumption. In addition, the union of the intersection of ssb_ToMeasure and SMTC with ssb_PositionInBurst can ensure that SSBs from the UE 902 serving cell are measured.

[0072] refer to Figure 4A, ssb_PositionInBurst may be represented by a bitmap of 10110001, ssb_ToMeasure may be represented by a bitmap of 01101100, and the SMTC period may have a duration of 1 ms and an offset of 0 ms. SMTC may be represented by a bitmap of 11110000. Based on the SSB bitmap generation of (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC), the UE may generate an SSB bitmap of 11110001. The UE may determine a search window based on the generated SSB bitmap. The search window may extend from the first time slot to the fourth time slot (extending to cover the first to eighth bits of the SSB bitmap), and the UE may determine that the search window is a specific duration (e.g., 2 ms) with a specific offset (e.g., 0 ms) extending a specific number of time slots (e.g., four (4) time slots). By comparing the determined search window with the SMTC duration of 1 ms for two time slots, the UE may determine that the search window covers two more time slots than the SMTC (SMTC+2 time slots).

[0073] refer to Figure 4B , ssb_PositionInBurst may have a bitmap of 10000000, ssb_ToMeasure may have a bitmap of 01000000, and SMTC may have a duration of 1 ms, and an offset of 0 ms. The SMTC may be represented by a bitmap of 11110000. Based on the SSB bitmap generation of (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC)), the UE may generate an SSB bitmap of 11000000. The search window may extend for the first slot (extending to cover the first and second bits of the SSB bitmap), and the UE may determine that the search window is 0.5 ms, offset by 0 ms, to extend for the first slot. Comparing the determined search window with the SMTC duration of 1 ms for two slots, the UE may determine that the search window covers one slot less than the SMTC (SMTC-1 slot).

[0074] The UE may further process the SSB measured within the search window based on at least one of ssb_PositionInBurst, ssb_ToMeasure, SMTC, or an SSB bitmap. In some aspects, the UE may prune measurements in certain SSBs based on at least one of ssb_PositionInBurst, ssb_ToMeasure, SMTC, or an SSB bitmap. In one aspect, the UE may remove measurements associated with SSBs received from the serving cell in time slots not indicated as desired SSBs based on ssb_PositionInBurst. In another aspect, the UE may remove measurements associated with SSBs received from one or more neighboring cells in time slots not indicated as desired SSBs based on the intersection of the second parameter bitmap P2 and the SMTC (i.e., ssb_ToMeasure∩SMTC).

[0075] refer to Figure 4C , the SSB bitmap can refer to Figure 4A The SSB bitmap in the UE. Based on the result of the SSB bitmap generation and the search window determination of (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC), the UE can search for all SSBs within the search window. ssb_PositionInBurst indicates that the SSBs associated with the first, third, fourth, and eighth bits of ssb_PositionInBurst from the serving cell are to be measured, and the measurements associated with the SSBs from the serving cell and associated with the second, fifth, sixth, and seventh bits of ssb_PositionInBurst can be discarded and not sent to the base station. Therefore, the UE can prune the measurements associated with the measured SSBs by deleting or removing the measurements associated with the SSBs that are not desired by the serving cell and do not correspond to ssb_PositionInBurst. Similarly, since (ssb_ToMeasure∩SMTC)=01100000 indicates that the SSBs from the neighboring cell and associated with the second and third bits of (ssb_ToMeasure∩SMTC) are to be measured, and measurements associated with the SSBs from the neighboring cell and associated with the first, third, fourth, fifth, sixth, seventh, and eighth bits of (ssb_ToMeasure∩SMTC) may be discarded or removed and not sent to the base station, the UE may prune measurements associated with the measured SSBs by deleting or removing measurements associated with SSBs that are not desired by the neighboring cell and do not correspond to (ssb_ToMeasure∩SMTC).

[0076] Figure 5A and 5B Examples 502 and 504 of determining a search window are illustrated. Figure 5A and 5B Examples 502 and 504 may illustrate a sub-6 GHz spectrum signal configured with a 15 kHz subcarrier spacing, and may include a time slot every 1 ms. However, embodiments are not necessarily limited thereto, and any format or configuration of parameter sets and subcarrier spacing for 5G / NR may be implemented as long as it is applicable.

[0077] refer to Figure 5A In example 502 shown in , the base station may configure ssb_PositionInBurst instead of ssb_ToMeasure, and the UE may determine the ssb_PositionInBurst received from the base station. Therefore, the UE may determine that ssb_ToMeasure is 11111111 (corresponding to the maximum value of the bitmap) and that the SMTC has a duration of 5 ms with an offset of 0 ms (corresponding to the maximum duration), which may be represented by the bitmap 11111111. Since ssb_positionInBurst has a bitmap of 00110100, based on the SSB bitmap generation of (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC), the UE may generate an SSB bitmap of 11111111. Therefore, the search window may extend from the first slot to the fourth slot (extending to cover the first to eighth bits of the SSB bitmap), and the UE may determine that the search window has a length of 4 ms with an offset of 0 ms to extend four slots. Comparing the determined search window with the 5 ms SMTC duration of five slots with a 0 ms offset, the UE can determine that the search window covers one slot less than the SMTC, i.e., SMTC-1 slot. The UE can save power by reducing the search window length or duration to 4 ms.

[0078] refer to Figure 5BIn the example 504 shown in FIG, the base station may configure ssb_PositionInBurst and ssb_ToMeasure, and the UE may determine the ssb_PositionInBurst and ssb_ToMeasure received from the base station. The UE may determine that the SMTC has a duration of 5 ms with an offset of 0 ms (which corresponds to the maximum duration), which may be represented by a bitmap of 11111111. ssb_PositionInBurst has a bitmap of 00110100, and ssb_ToMeasure has a bitmap of 10110000, and based on the SSB bitmap generation of (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC), the UE may generate the SSB bitmap of 10110100. Therefore, the search window may extend from the first slot to the third slot (extending to cover the first to sixth bits of the SSB bitmap), and the UE may determine that the search window has a length of 3 ms with a 0 ms offset, extending for 3 slots. Comparing the determined search window with the 5ms SMTC duration of 5 slots with a 0ms offset, the UE can determine that the search window covers 2 slots less than the SMTC, i.e., SMTC-2 slots. Therefore, the UE can save power by reducing the search window duration to 3ms.

[0079] Figure 6A and 6B Examples 602 and 604 of determining a search window are illustrated. Figure 6A and 6B Examples 602 and 604 in the figure illustrate a sub-6 GHz spectrum signal configured with a 15 kHz subcarrier spacing, and may include one time slot every 1 ms. However, the embodiments are not necessarily limited thereto, and any format or configuration parameter set and subcarrier spacing of 5G / NR may be implemented as long as it is applicable.

[0080] refer to Figure 6AIn example 602 shown in , the base station may configure ssb_PositionsInBurst and SMTC, and the UE may determine the ssb_PositionInBurst and SMTC received from the base station. Therefore, the UE may determine that ssb_ToMeasure is 11111111 (corresponding to the maximum value of the bitmap). Since ssb_PositionInBurst has a bitmap of 00110100 and SMTC has a duration of 1ms with an offset of 1ms, which may be represented by a bitmap of 00110000, the UE may generate an SSB bitmap of 00110100 based on the SSB bitmap generation of (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC). Therefore, the search window may extend from the second slot to the third slot (extending to cover the third to sixth bits of the SSB bitmap), and the UE may determine that the search window has a length of 2ms with an offset of 1ms and an extension of 2 slots. By comparing the determined search window with the 1ms wait time of the SMTC, offset by 1ms, the UE can determine that the search window covers 1 slot more than the SMTC, i.e., SMTC + 1 slot. Therefore, the UE can save power by reducing the search window wait time to 2ms without losing the serving cell active SSB.

[0081] refer to Figure 6B In example 604 shown in , the base station may configure ssb_PositionInBurst, ssb_ToMeasure, and SMTC, and thus, the UE may determine the ssb_PositionInBurst, ssb_ToMeasure, and SMTC received from the base station. Thus, the UE may determine that ssb_PositionInBurst has a bitmap of 00110100, ssb_ToMeasure has a bitmap of 10110000, and SMTC has a duration of 3ms with an offset of 1ms, which may be represented by a bitmap of 00111111. Based on the SSB bitmap generation of (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC), the UE may generate an SSB bitmap of 00110100. Thus, the search window may extend from the second time slot to the third time slot, extending to cover the third to sixth bits of the SSB bitmap. The UE may determine that the search window has a length of 2ms, an offset of 1ms, and extends by 2 time slots. By comparing the determined search window with the SMTC duration of 3ms with a 1ms offset of 3 slots, the UE can determine that the search window covers 1 slot less than the SMTC, i.e., SMTC-2 slots. Therefore, the UE can save power by reducing the search window duration to 2ms and suspend the UE from searching for SSBs from irrelevant neighboring cells.

[0082] Figure 7A and 7B Examples 702 and 704 of determining a search window are illustrated. Figure 7A and 7B An example of a poor network configuration from a base station may be provided, and it illustrates how a UE may reduce the search window without degrading performance. Figure 7A and 7B Examples 702 and 704 in the figure illustrate a sub-6 GHz spectrum signal configured with a 15 kHz subcarrier spacing, and may include one time slot every 1 ms. However, the embodiments are not necessarily limited thereto, and any format or configuration parameter set and subcarrier spacing of 5G / NR may be implemented as long as it is applicable.

[0083] refer to Figure 7A In example 702 shown in , the base station may configure ssb_PositionInBurst, ssb_ToMeasure, and SMTC, and the UE may determine the ssb_PositionInBurst, ssb_ToMeasure, and SMTC received from the base station. Thus, the UE may determine that ssb_PositionInBurst has a bitmap of 00110100, ssb_ToMeasure has a bitmap of 00110000, and SMTC has a duration of 5ms with an offset of 1ms, which may be represented by a bitmap of 00111111. Based on the SSB bitmap generation of (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC), the UE may generate an SSB bitmap of 00111100. Thus, the search window may extend from the second time slot to the third time slot, extending to cover the third to sixth bits of the SSB bitmap. The UE may determine that the search window has a length of 2ms, an offset of 1ms, and extends by 2 time slots. Comparing the determined search window with the SMTC duration of 5 ms for 5 slots with a 1 ms offset, the UE may determine that the search window covers 3 slots less than the SMTC, ie, SMTC-3 slots.

[0084] The SMTC configuration as described above is allowed for 5G / NR, but such configuration may not be an appropriate configuration, which may mislead conventional UEs to perform searches with a duration of 5ms to 6ms (5ms to cover SMTC or 6ms to cover both bitmap and SMTC). Figure 4AIn the case of the search window shown in FIG4B or FIG4B , the above configuration from the base station may mislead a conventional UE into searching for 5 ms to cover the SMTC or searching for 6 ms to cover both the parameter bitmap and the SMTC. As a result, a conventional UE may waste power searching during the duration when no SSB is expected to be detected. However, the UE can save power by reducing the search window length to 2 ms without degrading the UE's performance.

[0085] refer to Figure 7B In example 704 shown in , the base station may configure ssb_PositionInBurst, ssb_ToMeasure, and SMTC, and the UE may determine the ssb_PositionInBurst, ssb_ToMeasure, and SMTC received from the base station. Thus, the UE may determine that ssb_PositionInBurst has a bitmap of 11000000, ssb_ToMeasure has a bitmap of 00110000, and SMTC has a duration of 5ms with an offset of 1ms, which may be represented by a bitmap of 00111111. Based on the SSB bitmap generation of (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC), the UE may generate an SSB bitmap of 11110000. Thus, the search window may extend from the first time slot to the second time slot, extending to cover the first to fourth bits of the SSB bitmap. The UE may determine that the search window has a length of 2ms, an offset of 0ms, and extends by 2 time slots. Comparing the determined search window with the SMTC duration of 5 ms for 5 slots with a 1 ms offset, the UE may determine that the search window covers 3 slots less than the SMTC, ie, SMTC-3 slots.

[0086] Figure 7B The above situation depicted in is another bad configuration from the base station, where the report from the conventional UE may show that the SMTC fails to cover the broadcast service cell SSB. The conventional UE may be misled and skip the search during the first millisecond window of the potential search time of the SSB, which may cause the conventional UE to lose synchronization with the serving cell and declare a radio link failure (RLF) with the base station. That is, since the above SMTC configuration from the base station does not cover all broadcast service cells SSB, the conventional UE may be misled to skip the search during the first millisecond window of the potential search time of the SSB without the generation of the SSB bitmap and the determination of the search window. Therefore, the conventional UE may determine that it is losing synchronization with the serving cell and erroneously declare an RLF signal to the base station. Therefore, the conventional UE may waste power searching during the duration when no SSB is expected to be detected. On the other hand, as Figure 4AAs shown in FIG4B , the UE can save power and improve the performance of the UE by reducing the search window length from 5 ms to 2 ms.

[0087] Figure 8A and 8B Examples 800 and 850 of determining a search window are illustrated. Figure 8A The first example 800 illustrates a synchronous network, including a serving cell, a first neighboring cell, and a second neighboring cell. That is, the serving cell, the first neighboring cell, and the second neighboring cell may be synchronized with each other. The base station may signal the UE to indicate that the network including the serving cell and one or more neighboring cells is a synchronous network. For example, the base station may signal "deriveSSB-IndexFromCell=true" to the UE in SIB2 to indicate that the network is synchronized. The serving cell and the one or more neighboring cells are synchronized with each other, and the boundaries of the frames or time slots of the signals from the serving cell and the one or more neighboring cells may be aligned in time. Therefore, the UE may generate an SSB bitmap based on ssb_PositionInBurst, ssb_ToMeasure, and / or the SMTC period.

[0088] The UE may generate the SSB bitmap as (ssb_PositionsInBurst)∪(ssb_ToMeasure∩SMTC), and the UE may determine the search window based on the SSB bitmap. Thus, the search window may extend from the first time slot of the ssb_PositionsInBurst of the serving cell to the sixth time slot of the ssb_ToMeasure of the neighboring cell (including the first neighboring cell and the second neighboring cell).

[0089] on the other hand, Figure 8B The second example 850 illustrates an asynchronous network, including a serving cell, a first neighboring cell, and a second neighboring cell. That is, the serving cell, the first neighboring cell, and the second neighboring cell may not be synchronized with each other. The base station may send a signal to the UE to indicate that the network including the serving cell and one or more neighboring cells is an asynchronous network. For example, the base station may signal "deriveSSB-IndexFromCell=false" to the UE in SIB2 to indicate that the network is asynchronous. Because the serving cell and one or more neighboring cells may not be synchronized with each other, and the boundaries of the frames or time slots of the signals from the serving cell and the one or more neighboring cells may not be aligned with each other in time. Therefore, the UE may not generate the SSB bitmap based on ssb_PositionInBurst, ssb_ToMeasure and / or SMTC period.

[0090] A UE on an asynchronous network may not determine the search window based on the SSB bitmap. Therefore, the UE on the asynchronous network may determine the search window as SMTC+y time slots, which may include both ssb_PositionsInBurst and SMTC. That is, the UE may determine that the search window extends to include ssb_PositionsInBurst ∪ SMTC. In one aspect, the search window may extend from the first time slot for measuring SSB indicated in the union of the first parameter bitmap and SMTC to the last time slot for measuring SSB indicated in the union of the first parameter bitmap and SMTC. Here, the UE may determine that the search window extends from the first time slot of ssb_PositionsInburst to the end of the SMTC, i.e., SMTC+4 time slots. Therefore, the UE on the asynchronous network may not be as effective as the UE on the synchronous network in adapting to the asynchronous cell.

[0091] In order to process, e.g., prune, the results of measurements in certain SSBs, a UE on an asynchronous network may prune measurements associated with each neighboring cell at its own timing based on its ssb_ToMeasure. That is, the UE may prune measurements associated with SSBs measured on the serving cell corresponding to 1 in ssb_PositionsInburst. For each neighboring cell, the vE may retain measurements associated with SSBs measured in the neighboring cell corresponding to 1 in ssb_ToMeasure. In one aspect, the UE may remove measurements associated with SSBs received from the serving cell in time slots not indicated as desired SSBs based on ssb_PositionsInBurst. On the other hand, the UE may remove measurements associated with SSBs received from at least one neighboring cell in time slots not indicated as desired SSBs based on ssb_ToMeasure.

[0092] Figure 9 900 is a call diagram of a wireless communication method. Call diagram 900 includes UE 902 and base station 904, and UE 902 can perform an example process of searching for and measuring SSBs received from base station 904.

[0093] At 906, the UE 902 may receive at least one of the following parameters from the base station 904: a first parameter bitmap associated with the SSB, a second parameter bitmap, and / or an SMTC period. Here, the first parameter bitmap may be ssb_PositionInBurst, and the second parameter bitmap may be ssb_ToMeasure. ssb_PositionInBurst may be configured by the NW, and ssb_ToMeasure or SMTC may optionally be configured by the NW. The UE 902 may receive at least one of ssb_PositionInBurst, ssb_ToMeasure, or SMTC. That is, the base station 904 may configure ssb_PositionInBurst, and may also optionally configure ssb_ToMeasure and SMTC. The UE 902 may receive ssb_PositionInBurst, ssb_ToMeasure, and SMTC in SIB2.

[0094] At 908, the UE 902 may determine a first parameter bitmap, a second parameter bitmap, and an SMTC period. The first parameter bitmap may be ssb_PositionInBurst, and the second parameter bitmap may be ssb_ToMeasure. In one aspect, the base station 904 may configure all of ssb_PositionInBurst, ssb_ToMeasure, and SMTC, and the UE 902 may determine the ssb_PositionInBurst, ssb_ToMeasure, and SMTC configured by the NW. If the UE 902 does not receive ssb_ToMeasure and / or SMTC, the UE 902 determines the maximum value of each parameter not received as the default value for the parameter. For example, when the base station 904 does not send ssb_ToMeasure to the UE 902, the UE 902 may determine that all received SSBs may be measured (the maximum value of ssb_ToMeasure). When the base station 904 does not send SMTC to the UE 902, the UE 902 may determine that the SMTC has a duration of 5 ms (the maximum value of SMTC).

[0095] In other words, at 906, the UE 902 may receive some parameters associated with the received SSB, and the received parameters may include ssb_PositionInBurst, ssb_ToMeasure, and SMTC. ssb_ToMeasure and SMTC may be optionally configured by the base station 904, so the base station 904 may send ssb_PositionInBurst separately, and the UE 902 may receive ssb_PositionInBurst separately.

[0096] At 909 , the UE 902 may determine a search window for searching for a received SSB based on the SMTC and at least one of the first parameter bitmap or the second parameter bitmap determined at 908 . 909 may include 910 , 912 , and 913 .

[0097] At 910, the network may be a synchronous network including at least one neighboring cell synchronized with the serving cell, and the UE 902 may determine the SSB bitmap based on each of the first parameter bitmap, the second parameter bitmap, and / or the SMTC period determined by the UE 902. The UE 902 may determine the SSB bitmap based on the intersection of ssb_PositionInBurst or ssb_ToMeasure and SMTC (ssb_ToMeasure∩SMTC). The UE 902 may determine the SSB bitmap based on the union of ssb_PositionInBurst and the intersection of ssb_ToMeasure and SMTC. That is, the SSB bitmap may be determined according to the following formula: ssb_PositionsInBurst∪(ssb_ToMeasure∩SMTC). The base station 904 may inform the UE 902 that the network is a synchronous network. For example, the parameter "deriveSSB-IndexFromCell=true" in SIB2 may indicate that the network is a synchronous network.

[0098] The intersection of ssb_ToMeasure and SMTC (ssb_ToMeasure∩SMTC) can specify that SSBs outside the applicable SMTC from neighboring cells are not measured, regardless of the value of ssb_ToMeasure. The intersection operation can cover SSBs broadcast by neighboring cells while minimizing the window duration to reduce power consumption. In addition, the union of the intersection of ssb_ToMeasure and SMTC with ssb_PositionInBurst can ensure that SSBs from the serving cell of UE 902 are measured.

[0099] At 912, UE 902 may determine a search window for searching for SSBs on the synchronization network based on an SSB bitmap determined based on each of the first parameter bitmap, the second parameter bitmap, and the SMTC. That is, UE 902 may determine that the search window extends in time from the first time slot indicated by the SSB bitmap for measuring the SSB to the last time slot indicated by the SSB bitmap for measuring the SSB. Based on the determination of the search window duration, the search window may be SMTC ± x time slots to cover SSBs configured as 1 in the SSB bitmap. That is, UE 902 may determine, based on the SSB bitmap, that the search window includes fewer time slots than specified by the SMTC, the same number of time slots as specified by the SMTC, or a greater number of time slots than specified by the SMTC.

[0100] At 913, the network may be an asynchronous network including at least one neighboring cell that is not synchronized with the serving cell, and UE 902 may determine a search window based on each of the first parameter bitmap and the SMTC. UE 902 may determine a union including the first parameter bitmap P1 or the SMTC, i.e., P1∪SMTC. The search window may be extended to include the first parameter bitmap P1 and the SMTC. Base station 904 may notify UE 902 that the network is an asynchronous network. For example, the parameter "deriveSSB-IndexFromCell=false" in the SIB2 may indicate to the UE that the network is an asynchronous network.

[0101] At 914, UE 902 may measure SSBs received during the determined search window. That is, UE 902 may measure all SSBs received within the determined search window. For a synchronous network, the search window may be determined at 912 based on the SSB bitmap determined at 910 based on each of the first parameter bitmap, the second parameter bitmap, and the SMTC. For an asynchronous network, the search window may be determined at 913 based on each of the first parameter bitmap and the SMTC.

[0102] At 916, the UE 902 may process / prune measurements associated with the SSB based on at least one of the first parameter bitmap, the second parameter bitmap, the SMTC, or the SSB bitmap to generate measurement results associated with at least a subset of the measured SSBs. The UE 902 may be configured to prune measurements associated with the SSB based on ssb_PositionsInBurst, ssb_ToMeasure, and / or the SMTC at 914 to generate measurement results associated with at least a subset of the measured SSBs sent to the base station 904. In particular, based on the measurement results, the database may prune measurements associated with SSBs received in time slots not indicating any SSBs of a cell for which a corresponding cell is desired.

[0103] In one aspect, UE 902 may be on a synchronized network and measure an SSB based on the search space determined at 912 and based on the SSB bitmap determined at 910. The UE may prune measurements associated with the measured SSB based on ssb_PositionInBurst, ssb_ToMeasure, and SMTC. For example, the database may retain measurements associated with an SSB from a serving cell corresponding to a value of 1 in ssb_PositionInBurst and retain results of measurements associated with an SSB from a neighboring cell corresponding to a value of 1 in (ssb_ToMeasure∩SMTC). That is, ssb_PositionInBurst and ssb_ToMeasure may respectively indicate whether an SSB may be expected in a particular timeslot, and the UE 902 may be configured to prune measurements associated with the measured SSB based on ssb_PositionInBurst and ssb_ToMeasure. For example, a value of 1 in specific bits of ssb_PositionInBurst and ssb_ToMeasure may indicate that an SSB is expected from the corresponding cell, while a value of 0 may indicate that an SSB is not expected from the corresponding cell. The UE 902 may remove measurements associated with SSBs received from the serving cell in time slots not expected by the serving cell based on ssb_PositionInBurst, and may remove measurements associated with SSBs received from a neighboring cell in time slots not expected by the neighboring cell based on the intersection of ssb_ToMeasure and SMTC (ssb_ToMeasure∩SMTC).

[0104] In another aspect, UE 902 may be on an asynchronous network and measure SSBs based on the search space determined at 913 based on the first parameter bitmap and the second parameter bitmap. The UE may prune measurements associated with the measured SSBs based on ssb_PositionInBurst and ssb_ToMeasure to generate measurement results associated with a subset of the measured SSBs. For example, the database may retain measurements associated with an SSB from the serving cell corresponding to a value of 1 in ssb_PositionInBurst, and retain measurements associated with SSBs from neighboring cells corresponding to a value of 1 in ssb_ToMeasure for each neighboring cell. That is, ssb_PositionInBurst and ssb_ToMeasure may respectively indicate whether an SSB can be expected in a particular time slot, and UE 902 may be configured to prune measurements associated with the measured SSBs based on ssb_PositionInBurst and ssb_ToMeasure. For example, a value of 1 in specific bits of ssb_PositionInBurst and ssb_ToMeasure may indicate that SSBs are expected from the corresponding serving cell and the neighboring cell, while a value of 0 may indicate that SSBs are not expected from the corresponding serving cell and the neighboring cell. The UE 902 may remove measurements associated with SSBs received from the serving cell in time slots not expected by the serving cell based on ssb_PositionInBurst, and may remove measurements associated with SSBs received from the neighboring cell in time slots not expected by the neighboring cell based on ssb_ToMeasure.

[0105] At 918, the UE 902 may transmit measurement results associated with the subset of measured SSBs. The base station 904 and the UE 902 may also schedule communications based on the measurement results transmitted from the UE 902 to the base station 904.

[0106] Throughout this disclosure, the parameter bitmap uses specific values ​​to indicate whether SSBs are expected from the serving cell and / or neighboring cells. Specifically, a value of 1 is used to indicate that SSBs are expected from the corresponding cell, while a value of 0 is used to indicate that SSBs are not expected from the corresponding cell. However, embodiments are not necessarily limited thereto, and any value may be implemented for the parameter bitmap as long as it is applicable.

[0107] Figure 10A and 10B 1000A and 1000B are flow charts of a wireless communication method. The method may be performed by a UE (eg, UE 104 / 350 / 902, apparatus 1102). The UE may search for and measure SSBs received from a base station based on a parameter set.

[0108] At 1001, a UE may receive a parameter set associated with an SSB, and the parameter set may include at least one of a first parameter bitmap, a second parameter bitmap, or an SMTC period. In some aspects, the first parameter bitmap may be an ssb_PositionInBurst parameter, and the second parameter bitmap may be an ssb_ToMeasure parameter received from a base station. ssb_ToMeasure and SMTC may be optionally configured by the base station, and the base station may send ssb_PositionInBurst without sending ssb_ToMeasure and SMTC. In other words, the UE may receive ssb_PositionInBurst and may optionally receive ssb_ToMeasure and / or SMTC. For example, at Figure 9 In step 906 , the UE 902 may receive the following parameters from the base station 904 : a first parameter bitmap, a second parameter bitmap, and / or an SMTC period associated with the SSB. Furthermore, step 1001 may be performed by the SSB search window parameter management component 1140 .

[0109] At 1002, the UE may determine a parameter set associated with receiving an SSB, the parameter set comprising a first parameter bitmap associated with a serving cell, a second parameter bitmap associated with at least one neighboring cell, and an SMTC. In some aspects, the first parameter bitmap may be an ssb_PositionInBurst parameter, and the second parameter bitmap may be an ssb_ToMeasure parameter received from a base station. The UE may receive the ssb_PositionInBurst parameter, the ssb_ToMeasure parameter, and the SMTC from the base station, and the UE may determine the first parameter bitmap based on the ssb_PositionInBurst parameter, the ssb_ToMeasure parameter, and the SMTC received from the base station. For example, Figure 9 At 908 , the UE 902 may determine a first parameter bitmap, a second parameter bitmap, and an SMTC period. Furthermore, 1002 may be performed by the SSB search window parameter management component 1140 .

[0110] In some aspects, certain parameters may not be received from the base station. The UE may not receive ssb_ToMeasure and / or SMTC, and the UE may determine the maximum value of each parameter in the parameter set not received as a default value. In one example, the base station may not configure and send ssb_ToMeasure to the UE, and the UE may determine that all received SSBs can be measured. In another example, the base station may not configure / send SMTC to the UE, and the UE may determine that the SMTC has a duration of 5 ms, i.e., the maximum duration.

[0111] At 1003, the UE may determine a search window for searching for a received SSB based on the SMTC and at least one of the first parameter bitmap or the second parameter bitmap determined at 1002. 1003 may include 1004, 1006, and 1007. For example, at Figure 9 In 909 , the UE 902 may determine a search window for searching for the received SSB based on the SMTC and at least one of the first parameter bitmap or the second parameter bitmap determined in 908 . Furthermore, 1003 may be performed by the SSB search window parameter management component 1140 .

[0112] At 1004, the network may be a synchronous network including at least one neighboring cell synchronized with the serving cell, and the UE may determine the SSB bitmap based on each of the first parameter bitmap, the second parameter bitmap and / or the SMTC period determined by the UE. The UE may determine the SSB bitmap based on the intersection of ssb_PositionInBurst or ssb_ToMeasure and SMTC (ssb_ToMeasure∩SMTC). The UE may determine the SSB bitmap based on the union of ssb_PositionInBurst and the intersection of ssb_ToMeasure and SMTC. That is, the SSB bitmap may be determined according to the following formula: ssb_PositionsInBurst∪(ssb_ToMeasure∩SMTC). The base station may notify the UE that the network is a synchronous network. For example, the parameter "deriveSSB-IndexFromCell=true" in SIB2 may indicate that the network is a synchronous network. For example, in Figure 9 At 910 , the UE 902 may determine an SSB bitmap based on each of the first parameter bitmap, the second parameter bitmap, and / or the SMTC period determined by the UE 902. Furthermore, 1004 may be performed by the SSB bitmap component 1142.

[0113] At 1006, the UE may determine a search window for searching for SSBs on a synchronization network based on an SSB bitmap determined based on each of the first parameter bitmap, the second parameter bitmap, and the SMTC. The UE may determine that the search window has a duration extending in time from the first time slot indicated by the SSB bitmap for measuring the SSB and the last time slot indicated by the SSB bitmap for measuring the SSB. That is, the search window may extend in time from the first time slot indicated by the SSB bitmap for measuring the SSB to the last time slot indicated by the SSB bitmap for measuring the SSB. Based on the SSB bitmap, the UE may determine that the search window includes fewer time slots than the SMTC, the same number of time slots as the SMTC, or a greater number of time slots than the SMTC. Depending on the determination of the search window duration, the search window may be SMTC±x time slots to cover the SSBs configured as 1 in the SSB bitmap. That is, the UE 902 may determine, based on the SSB bitmap, that the search window includes fewer time slots than specified by the SMTC, the same number of time slots as specified by the SMTC, or a greater number of time slots than specified by the SMTC. For example, in Figure 9 At 912, UE 902 may determine a search window for searching for an SSB on a synchronization network based on an SSB bitmap, the SSB bitmap being determined based on each of the first parameter bitmap, the second parameter bitmap, and the SMTC. Furthermore, 1006 may be performed by SSB search window parameter management component 1140.

[0114] At 1007, the network may be an asynchronous network including at least one neighboring cell that is not synchronized with the serving cell, and the UE may determine a search window based on each of the first parameter bitmap and the SMTC. The UE 902 may determine a union including the first parameter bitmap P1 or the SMTC, i.e., P1∪SMTC. The search window may be extended to include the first parameter bitmap P1 and the SMTC. The base station 904 may inform the UE that the network is an asynchronous network. For example, the parameter "deriveSSB-IndexFromCell=false" in the SIB2 may indicate to the UE that the network is an asynchronous network. For example, in Figure 9 In 913 , UE 902 may determine a search window based on each of the first parameter bitmap and the SMTC. Furthermore, 1007 may be performed by SSB search window parameter management component 1140 .

[0115] At 1008, the UE may measure all SSBs received within the search window determined at 1003. That is, the UE may measure all SSBs received within the determined search window. For a synchronous network, the search window may be determined at 1006 based on the SSB bitmap, which is determined at 1004 based on each of the first parameter bitmap, the second parameter bitmap, and the SMTC. For an asynchronous network, the search window may be determined at 1007 based on each of the first parameter bitmap and the SMTC. For example, Figure 9 At 914 , the UE 902 can measure the SSBs received during the determined search window. Additionally, 1008 can be performed by the SSB measurement component 1144 .

[0116] At 1010, the UE may process / prune measurements associated with the SSB based on at least one of the first parameter bitmap, the second parameter bitmap, the SMTC, or the SSB bitmap to generate measurement results associated with at least a subset of the measured SSBs. The UE may prune measurements associated with the SSB based on ssb_PositionsInBurst, ssb_ToMeasure, and / or the SMTC at 1008 to generate measurement results associated with at least a subset of the measured SSBs sent to the base station 904. In particular, based on the measurement results, the database may prune measurements associated with SSBs received in time slots for which no SSBs of a cell are indicated as expected. For example, at Figure 9 At 916 , the UE 902 may process / prune the measured SSB based on at least one of the first parameter bitmap, the second parameter bitmap, the SMTC, or the SSB bitmap. Furthermore, 1010 may be performed by the SSB measurement database management component 1146 .

[0117] In one aspect, the UE may measure the SSB on a synchronized network and based on the SSB bitmap determined at 1004 and based on the search space determined at 1006. The UE may prune measurements associated with the measured SSB based on ssb_PositionInBurst, ssb_ToMeasure, and SMTC. For example, the database may retain measurements associated with the SSB from the serving cell, which corresponds to a value of 1 in ssb_PositionInBurst, and retain measurements associated with the SSB from the neighboring cell, which corresponds to a value of 1 in (ssb_ToMeasure∩SMTC). That is, ssb_PositionInBurst and ssb_ToMeasure may respectively indicate whether an SSB can be expected in a particular time slot, and the UE 902 may be configured to prune measurements associated with the measured SSB based on ssb_PositionInBurst and ssb_ToMeasure. For example, a value of 1 in specific bits of ssb_PositionInBurst and ssb_ToMeasure may indicate that an SSB is expected from the corresponding cell, while a value of 0 may indicate that an SSB is not expected from the corresponding cell. The UE may remove measurements associated with SSBs received from the serving cell in time slots not expected by the serving cell based on ssb_PositionInBurst, and remove measurements associated with SSBs received from neighboring cells in time slots not expected by the neighboring cell based on the intersection of ssbToMeasure and SMTC (ssb_ToMeasure∩SMTC).

[0118] In another aspect, the UE may be on an asynchronous network and may measure the SSB based on the search space determined at 913 based on the first parameter bitmap and the second parameter bitmap. The UE may prune measurements associated with the measured SSB based on ssb_PositionInBurst and ssb_ToMeasure to generate measurement results associated with a subset of the measured SSBs. For example, the database may retain measurements associated with the SSB from the serving cell corresponding to a value of 1 in ssb_PositionInBurst and retain measurements associated with the SSB from the neighboring cells corresponding to a value of 1 in ssb_ToMeasure for each neighboring cell. That is, ssb_PositionInBurst and ssb_ToMeasure may respectively indicate whether an SSB can be expected in a particular time slot, and the UE may be configured to prune measurements associated with the measured SSB based on ssb_PositionInBurst and ssb_ToMeasure. For example, a value of 1 in a specific bit of ssb_PositionInBurst and ssb_ToMeasure may indicate that SSBs are expected from the corresponding serving cell and the neighboring cell, while a value of 0 may indicate that SSBs are not expected from the corresponding serving cell and the neighboring cell. The UE 902 may remove measurements associated with SSBs received from the serving cell in time slots not expected by the serving cell based on ssb_PositionInBurst, and may remove measurements associated with SSBs received from the neighboring cell in time slots not expected by the neighboring cell based on ssb_ToMeasure.

[0119] At 1012, the UE may transmit measurement results associated with the subset of measured SSBs. The base station and the UE may also schedule communications based on the measurement results transmitted from the UE to the base station. For example, Figure 9 At 918 , the UE 902 may transmit measurement results associated with the subset of measured SSBs. Furthermore, 1012 may be performed by an SSB measurement reporting component 1148 .

[0120] Figure 111 is a diagram illustrating an example of a hardware implementation for an apparatus 1102. The apparatus 1102 may be a UE, a component of a UE, or may implement UE functionality. In some aspects, the apparatus 1102 may include a cellular baseband processor 1104 (also referred to as a modem) coupled to a cellular RF transceiver 1122. In some aspects, the apparatus 1102 may also include one or more subscriber identity module (SIM) cards 1120, an application processor 1106 coupled to a secure digital (SD) card 1108 and a screen 1110, a Bluetooth module 1112, a wireless local area network (WLAN) module 1114, a global positioning system (GPS) module 1116, or a power supply 1118. The cellular baseband processor 1104 communicates with the UE 104 and / or the BS 102 / 180 via the cellular RF transceiver 1122. The cellular baseband processor 1104 may include computer-readable media / memory. The computer-readable media / memory may be non-transitory. The cellular baseband processor 1104 is responsible for general processing, including executing software stored on a computer-readable medium / memory. When executed by the cellular baseband processor 1104, the software causes the cellular baseband processor 1104 to perform the various functions described above. The computer-readable medium / memory may also be used to store data manipulated by the cellular baseband processor 1104 when executing the software. The cellular baseband processor 1104 also includes a receive component 1130, a communication manager 1132, and a transmit component 1134. The communication manager 1132 includes one or more of the components shown. The components within the communication manager 1132 may be stored in the computer-readable medium / memory and / or configured as hardware within the cellular baseband processor 1104. The processing system 1104 may be a component of the UE 350 and may include memory 360 and / or at least one of the TX processor 368, the RX processor 356, and the controller / processor 359. In one configuration, the apparatus 1102 may be a modem chip and include only the baseband processor 1104, while in another configuration, the apparatus 1102 may be the entire UE (e.g., see Figure 3 350) and includes additional modules of device 1102.

[0121] The communication manager 1132 includes an SSB search window parameter management component 1140 configured to receive and determine a parameter set associated with an SSB, determine a search window for searching for a received SSB based on the SMTC and at least one of the first parameter bitmap or the second parameter bitmap, determine a search window for searching for an SSB on a synchronization network based on an SSB bitmap determined based on each of the first parameter bitmap, the second parameter bitmap, and the SMTC, and determine a search window based on each of the first parameter bitmap and the SMTC, e.g., as described in connection with 1001, 1002, 1003, 1006, and 1007. The communication manager 1132 also includes an SSB bitmap component 1142 configured to determine an SSB bitmap based on each of the first parameter bitmap, the second parameter bitmap, and / or the SMTC period determined by the UE, e.g., as described in connection with 1004. The communication manager 1132 includes an SSB measurement component 1144 configured to measure all SSBs received within the search window, e.g., as described in connection with 1008. The communication manager 1132 includes an SSB measurement database management component 1146 configured to process / prune measurements associated with the measured SSBs according to at least one of the first parameter bitmap, the second parameter bitmap, the SMTC, or the SSB bitmap, e.g., as described in connection with 1010. The communication manager 1132 includes an SSB measurement reporting component 1148 configured to transmit measurement results associated with a subset of the measured SSBs, e.g., as described in connection with 1012.

[0122] The apparatus may include executing Figure 9 、 10A and additional components for each box of the algorithm in the flowchart of 10B. Thus, Figure 9 、 10A Each block in the flowcharts of 10B and 10B may be performed by a component, and the apparatus may include one or more of these components. These components may be one or more hardware components specifically configured to perform the process / algorithm, implemented by a processor configured to perform the process / algorithm, stored on a computer-readable medium for implementation by a processor, or some combination thereof.

[0123] As shown, apparatus 1102 may include various components configured for various functions. In one configuration, apparatus 1102, and specifically cellular baseband processor 1104, includes means for determining a parameter set associated with a received SSB, means for determining a search window for searching for the received SSB based on the SMTC and at least one of the first parameter bitmap P1 or the second parameter bitmap P2, means for measuring the SSBs searched for during the determined search window, and means for transmitting measurement results associated with at least a subset of the measured SSBs to a base station. Apparatus 1102 includes means for determining the SSB based on each of the first parameter bitmap P1, the second parameter bitmap P2, and the SMTC, and means for determining the search window based on the SSB bitmap, wherein the SSB bitmap is determined based on each of the first parameter bitmap P1, the second parameter bitmap P2, and the SMTC. The apparatus 1002 includes means for determining an SSB bitmap based on at least one of an intersection of a first parameter bitmap P1 or a second parameter bitmap P2 and an SMTC (P2∩SMTC), wherein a search window is determined based on the determined SSB bitmap. The apparatus 1002 includes means for processing or pruning the measured SSBs based on at least one of the first parameter bitmap, the second parameter bitmap, the SMTC, or the SSB bitmap to generate measurement results associated with at least the subset of the measured SSBs, including means for removing measurements associated with SSBs received from the serving cell in time slots not indicated as desired SSBs based on the first parameter bitmap P1, and means for removing measurements associated with the SSBs received from the at least one neighboring cell in time slots not indicated as desired SSBs based on an intersection of the second parameter bitmap P2 and the SMTC (P2∩SMTC). The apparatus 1002 includes means for determining a search window based on each of the first parameter bitmap P1 and the SMTC. The apparatus 1002 includes means for processing / pruning measurements associated with measured SSBs based on at least one of a first parameter bitmap P1 or a second parameter bitmap P2 to generate measurement results associated with at least the subset of the measured SSBs, including means for removing measurements associated with SSBs received from a serving cell in time slots not indicated as desired SSBs based on the first parameter bitmap P1, and means for removing measurements associated with SSBs received from at least one neighboring cell in time slots not indicated as desired SSBs based on the second parameter bitmap P2. This means may be one or more of the components of the apparatus 1102 configured to perform the functions recited by the means. As described above, the apparatus 1102 may include the TX processor 368, the RX processor 356, and the controller / processor 359.Likewise, in one configuration, the components may be the TX Processor 368, RX Processor 356, and Controller / Processor 359 configured to perform the functions described by the components above.

[0124] As described above, the method generates an SSB bitmap and determines a search window for searching for SSBs. In some aspects, the UE may be on a synchronized network, and the UE may generate the SSB bitmap according to the following formula: ssb_PositionsInBurst∪(ssb_ToMeasure∩SMTC). Thus, the intersection operation of (ssb_ToMeasure∩SMTC) may cover the SSBs broadcast by neighboring cells while minimizing the window to save power, and the union of the intersection of ssb_ToMeasure and SMTC with ssb_PositionInBurst may ensure that the SSBs from the UE serving cell are not omitted. The UE may also be configured to prune measurements associated with the measured SSB. For example, the UE may remove measurements associated with SSBs received from the serving cell in time slots where the serving cell is not expected based on ssb_PositionInBurst, and remove measurements associated with SSBs received from the neighboring cell in time slots where the neighboring cell is not expected based on the intersection of ssb_ToMeasure and SMTC (ssb_ToMeasure∩SMTC).

[0125] In some aspects, the UE may be on an asynchronous network, and the UE may generate a search window to include the union of ssb_PositionsInBurst and SMTC according to the following formula ssb_PositionsInBurst∪SMTC. The UE may be further configured to delete measurements associated with the measured SSB. For example, the UE may remove measurements associated with an SSB received from a serving cell in a time slot not indicated as a desired SSB based on ssb_PositionsInBurst, and may remove measurements associated with an SSB received from at least one neighboring cell in a time slot not indicated as a desired SSB based on ssb_ToMeasure.

[0126] Based on the above discussion, a UE that performs a method of generating an SSB bitmap and determining a search window for searching for SSBs can have improved power management without degrading performance. Specifically, the UE can configure more reliable beam / cell detection and measurement, with reduced power consumption and increased UE mobility performance, and further have enhanced robustness by effectively handling various network configurations to avoid RLF. That is, the UE can save power by reducing the size of the search window without losing detection and measurement of the SSB of the serving cell. The UE can also be suspended from searching for SSBs from unrelated neighboring cells. In addition, the UE can react robustly to poor configurations of ssb_PositionsInBurst, ssb_ToMeasure, and SMTC, and save power by reducing the search window length while not skipping any SSBs from the serving cell.

[0127] It should be understood that the specific order or hierarchy of the blocks in the disclosed process / flowchart is illustrative of example solutions. Based on design preferences, it should be understood that the specific order or hierarchy of the blocks in the process / flowchart can be rearranged. In addition, some blocks can be combined or omitted. The attached method claims present the elements of the blocks in a sample order and are not meant to be limited to the specific order or hierarchy presented.

[0128] The preceding description is provided to enable any person skilled in the art to practice the various aspects described herein. It will be apparent to those skilled in the art that various modifications to these aspects will be apparent, and the general principles defined herein can be applied to other aspects. Therefore, the present claims are not intended to be limited to the various aspects shown herein, but rather to the full scope consistent with the language claims, wherein, unless otherwise specified, reference to an element in the singular is not intended to represent "one and only one", but rather to represent "one or more". The word "exemplary" is used herein to represent "serving as an example, instance, or illustration". Any aspect described herein as "exemplary" is not necessarily to be interpreted as being superior to or advantageous to other aspects. Unless otherwise expressly stated, the term "some" refers to one or more. Terms such as "at least one of A, B, or C", "one or more of A, B, or C", "at least one of A, B, and C", "one or more of A, B, and C", and "A, B, C, or any combination thereof" include any combination of A, B, and / or C, and may include multiple A, multiple B, or multiple C. Specifically, phrases such as “at least one of A, B, or C,” “one or more of A, B, or C,” “at least one of A, B, and C,” “one or more of A, B, and C,” and “A, B, C, or any combination thereof” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, wherein any such combination may include one or more members of A, B, or C. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure that are known or hereafter known to those of ordinary skill in the art are expressly incorporated herein by reference and are intended to be encompassed by the claims. Furthermore, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is expressly recited in the claims. The words “module,” “mechanism,” “element,” “device,” etc. may not replace the word “component.” Therefore, no claim element should be interpreted as a part-plus-function unless the phrase “component for…” is used to expressly recite the claim element.

[0129] The following aspects are merely illustrative and may be combined with other aspects or teachings described herein without limitation.

[0130] Aspect 1 is an apparatus for performing wireless communications at a UE, the apparatus comprising at least one processor coupled to a memory, the at least one processor and the memory being configured to determine a parameter set associated with a received SSB, the parameter set comprising a first parameter bitmap P1 associated with a serving cell, a second parameter bitmap P2 associated with at least one neighboring cell, or at least one of an SMTC, determine a search window for searching for a received SSB based on the SMTC and at least one of the first parameter bitmap P1 or the second parameter bitmap P2, measure the SSB searched during the determined search window, and send measurement results associated with at least a subset of the measured SSBs to a base station.

[0131] Aspect 2 is an apparatus according to aspect 1, wherein the first parameter bitmap P1 is an SSB burst position (ssb_PositionInBurst) bitmap associated with the serving cell, and the second parameter bitmap P2 is an SSB measurement (ssb_ToMeasure) bitmap associated with at least one neighboring cell.

[0132] Aspect 3 is an apparatus according to any one of Aspects 1 and 2, wherein at least one neighboring cell is synchronized with the serving cell, and at least one processor and memory configured to determine the search window are also configured to determine the SSB bitmap based on the first parameter bitmap P1, the second parameter bitmap P2 and the SMTC, and determine the search window based on the determined SSB bitmap.

[0133] Aspect 4 is an apparatus according to Aspect 3, wherein the at least one processor and the memory configured to determine the SSB bitmap are also configured to determine that the SSB bitmap is determined based on the intersection of the first parameter bitmap P1 or the second parameter bitmap P2 and the SMTC (P2∩SMTC), wherein the search window is determined based on the determined SSB bitmap.

[0134] Aspect 5 is an apparatus according to Aspect 4, wherein at least one processor and memory configured to determine the SSB bitmap are also configured to determine the SSB bitmap based on the intersection of the first parameter bitmap P1 or the second parameter bitmap P2 and the SMTC (P2∩SMTC), wherein the search window is determined based on the determined SSB bitmap.

[0135] Aspect 6 is an apparatus according to aspect 5, wherein the search window extends from a first time slot indicated in the SSB bitmap for measuring the SSB to a last time slot indicated in the SSB bitmap for measuring the SSB.

[0136] Aspect 7 is the apparatus according to any one of aspects 3 to 6, wherein the search window is determined to include fewer time slots than the SMTC, the same number of time slots as the SMTC, or a greater number of time slots than the SMTC.

[0137] Aspect 8 is an apparatus according to any one of Aspects 3 to 7, wherein the at least one processor and the memory are further configured to process measurements associated with the measured SSB based on at least one of the first parameter bitmap, the second parameter bitmap, the SMTC, or the SSB bitmap.

[0138] Aspect 9 is an apparatus according to Aspect 8, wherein the at least one processor configured to process measurements associated with the measured SSB and the memory are configured to prune measurements associated with the measured SSB based on at least one of the first parameter bitmap, the second parameter bitmap, the SMBC, or the SSB bitmap to generate measurement results associated with at least the subset of the measured SSBs.

[0139] Aspect 10 is an apparatus according to Aspect 9, wherein a bit in each of the first parameter bitmap P1 and the second parameter bitmap P2 indicates whether an SSB is expected in a particular time slot, and at least one processor and memory configured to delete measurements associated with the measured SSB are also configured to remove measurements associated with the SSB received from the serving cell in a time slot in which the expected SSB is not indicated based on the first parameter bitmap P1, and remove measurements associated with the SSB received from the at least one neighboring cell in a time slot in which the expected SSB is not indicated based on the intersection of the second parameter bitmap P2 and the SMTC (P2∩SMTC).

[0140] Aspect 11 is an apparatus according to any of Aspects 1 and 2, wherein at least one neighboring cell is not synchronized with the serving cell, and at least one processor and memory configured to determine the search window are also configured to determine the search window based on both the first parameter bitmap P1 and the SMTC.

[0141] Aspect 12 is the apparatus according to aspect 11, wherein the search window is determined to include a union of the first parameter bitmap P1 or the SMTC.

[0142] Aspect 13 is an apparatus according to Aspect 12, wherein the search window extends from a first time slot for measuring the SSB indicated in the union of the first parameter bitmap P1 and the SMTC to a last time slot for measuring the SSB indicated in the union of the first parameter bitmap P1 and the SMTC.

[0143] Aspect 14 is the apparatus according to aspects 11 to 13, wherein the at least one processor and the memory are further configured to process measurements associated with the measured SSB based on at least one of the first parameter bitmap P1 or the second parameter bitmap P2.

[0144] Aspect 15 is an apparatus according to Aspect 14, wherein at least one processor and memory configured to process measurements associated with the measured SSBs are further configured to prune measurements associated with the measured SSBs based on at least one of the first parameter bitmap P1 or the second parameter bitmap P2 to generate measurement results associated with at least a subset of the measured SSBs.

[0145] Aspect 16 is an apparatus according to Aspect 15, wherein the bit in each of the first parameter bitmap P1 and the second parameter bitmap P2 indicates whether an SSB is expected in a particular time slot, and the at least one processor and memory configured to prune measurements associated with the measured SSB are also configured to remove measurements associated with the SSB received from the serving cell in a time slot in which the expected SSB is not indicated based on the first parameter bitmap P1, and to remove measurements associated with the SSB received from the at least one neighboring cell in a time slot in which the expected SSB is not indicated based on the second parameter bitmap P2.

[0146] Aspect 17 is a method for implementing wireless communication of any one of aspects 1 to 16.

[0147] Aspect 18 is an apparatus for wireless communication comprising means for implementing any one of aspects 1 to 16.

[0148] Aspect 19 is a computer-readable medium storing computer-executable code, wherein the code, when executed by a processor, causes the processor to implement any one of aspects 1 to 16.

Claims

1. An apparatus for performing wireless communication at a user equipment (UE), comprising: Memory; as well as at least one processor coupled to the memory, the at least one processor and the memory being configured to: Determining a parameter set associated with receiving a synchronization signal block SSB, the parameter set comprising a first parameter bitmap P1 associated with a serving cell, a second parameter bitmap P2 associated with at least one neighboring cell, and an SSB measurement timing configuration SMTC; determining a search window for searching for the received SSB based on the SMTC and at least one of the first parameter bitmap P1 or the second parameter bitmap P2; Measuring the SSBs found during the determined search window; as well as Measurement results associated with at least a subset of the measured SSBs are sent to a base station.

2. The apparatus of claim 1, further comprising a transceiver coupled to the at least one processor.

3. The device according to claim 1, wherein The first parameter bitmap P1 is an SSB burst position bitmap associated with the serving cell, and the second parameter bitmap P2 is an SSB measurement bitmap associated with the at least one neighboring cell.

4. The device according to claim 1, wherein The at least one neighboring cell is synchronized with the serving cell, and the at least one processor and the memory configured to determine the search window are further configured to: determining an SSB bitmap based on the first parameter bitmap P1, the second parameter bitmap P2, and the SMTC; as well as The search window is determined based on the determined SSB bitmap.

5. The device according to claim 4, wherein The at least one processor and the memory configured to determine the SSB bitmap are further configured to: The SSB bitmap is determined based on an intersection P2∩SMTC of the first parameter bitmap P1 or the second parameter bitmap P2 and the SMTC, wherein the search window is determined based on the determined SSB bitmap.

6. The device according to claim 5, wherein The at least one processor and the memory configured to determine the SSB bitmap are further configured to: The SSB bitmap is determined based on P1∪(P2∩SMTC), where P1∪(P2∩SMTC) is the union of the first parameter bitmap P1, the second parameter bitmap P2 and the intersection P2∩SMTC of the SMTC, wherein the search window is determined based on the determined SSB bitmap.

7. The device according to claim 6, wherein The search window extends from a first time slot indicated in the SSB bitmap for measuring the SSB to a last time slot indicated in the SSB bitmap for measuring the SSB.

8. The device according to claim 4, wherein The search window is determined to include fewer time slots than the SMTC, the same number of time slots as the SMTC, or a greater number of time slots than the SMTC.

9. The device according to claim 4, wherein The at least one processor and the memory are further configured to process measurements associated with the measured SSB based on at least one of the first parameter bitmap P1 , the second parameter bitmap P2 , the SMTC, or the SSB bitmap.

10. The device according to claim 9, wherein The at least one processor configured to process the measured SSB and the memory are configured to: The measurements associated with the measured SSBs are truncated based on at least one of the first parameter bitmap P1, the second parameter bitmap P2, the SMTC, or the SSB bitmap to generate the measurement results associated with at least the subset of the measured SSBs.

11. The device according to claim 10, wherein A bit in each of the first parameter bitmap P1 and the second parameter bitmap P2 indicates whether an SSB is expected in a particular time slot, and the at least one processor and the memory configured to prune the measurements associated with the measured SSB are configured to: removing, based on the first parameter bitmap P1, measurements associated with an SSB received from the serving cell in a time slot not indicated as a desired SSB; as well as Based on an intersection P2∩SMTC of the second parameter bitmap P2 and the SMTC, measurements associated with SSBs received from the at least one neighboring cell in time slots not indicated as desired SSBs are removed.

12. The device according to claim 1, wherein The at least one neighboring cell is not synchronized with the serving cell, and the at least one processor and the memory configured to determine the search window are further configured to determine the search window based on both the first parameter bitmap P1 and the SMTC.

13. The device according to claim 12, wherein The search window is determined to include a union of the first parameter bitmap P1 and the SMTC.

14. The device according to claim 13, wherein The search window extends from a first time slot for measuring the SSB indicated in a union of the first parameter bitmap P1 and the SMTC to a last time slot for measuring the SSB indicated in a union of the first parameter bitmap P1 and the SMTC.

15. The device according to claim 12, wherein The at least one processor and the memory are further configured to process measurements associated with the measured SSB based on at least one of the first parameter bitmap P1 and the second parameter bitmap P2.

16. The device according to claim 15, wherein The at least one processor and the memory configured to process the measurements associated with the measured SSBs are configured to prune the measurements associated with the measured SSBs based on at least one of the first parameter bitmap P1 or the second parameter bitmap P2 to generate the measurement results associated with at least the subset of the measured SSBs.

17. The device according to claim 16, wherein A bit in each of the first parameter bitmap P1 and the second parameter bitmap P2 indicates whether an SSB is expected in a particular time slot, and the at least one processor and the memory configured to prune the measurements associated with the measured SSB are further configured to: removing, based on the first parameter bitmap P1, measurements associated with an SSB received from the serving cell in a time slot not indicated as a desired SSB; as well as Measurements associated with an SSB received from the at least one neighboring cell in a time slot not indicated as a desired SSB are removed based on the second parameter bitmap P2.

18. A method for wireless communication at a user equipment (UE), comprising: Determining a parameter set associated with receiving a synchronization signal block SSB, the parameter set comprising a first parameter bitmap P1 associated with a serving cell, a second parameter bitmap P2 associated with at least one neighboring cell, and an SSB measurement timing configuration SMTC; determining a search window for searching for the received SSB based on the SMTC and at least one of the first parameter bitmap P1 or the second parameter bitmap P2; Measuring the SSBs found during the determined search window; as well as Measurement results associated with at least a subset of the measured SSBs are sent to a base station.

19. The method according to claim 18, wherein The first parameter bitmap P1 is an SSB burst position bitmap associated with the serving cell, and the second parameter bitmap P2 is an SSB measurement bitmap associated with the at least one neighboring cell.

20. The method according to claim 18, wherein The at least one neighboring cell is synchronized with the serving cell, and the determining the search window further includes: determining an SSB bitmap based on the first parameter bitmap P1, the second parameter bitmap P2, and the SMTC; and The search window is determined based on the determined SSB.

21. The method according to claim 20, wherein Determining the SSB bitmap further includes: The SSB bitmap is determined based on an intersection P2∩SMTC of the first parameter bitmap P1 or the second parameter bitmap P2 and the SMTC, wherein the search window is determined based on the determined SSB bitmap.

22. The method according to claim 21, wherein Determining the SSB bitmap also includes: determining the SSB bitmap based on P1∪(P2∩SMTC), where P1∪(P2∩SMTC) is the union of the first parameter bitmap P1, the second parameter bitmap P2 and the intersection P2∩SMTC of the SMTC, wherein the search window is determined based on the determined SSB bitmap.

23. The method according to claim 22, wherein The search window extends from a first time slot indicated in the SSB bitmap for measuring the SSB to a last time slot indicated in the SSB bitmap for measuring the SSB.

24. The method according to claim 20, wherein The search window is determined to include fewer time slots than the SMTC, the same number of time slots as the SMTC, or a greater number of time slots than the SMTC.

25. The method of claim 20, further comprising processing measurements associated with the measured SSB based on at least one of the first parameter bitmap, the second parameter bitmap, the SMTC, or the SSB bitmap.

26. The method according to claim 25, wherein The processing of the measurements associated with the measured SSBs also includes pruning the measurements associated with the measured SSBs based on at least one of the first parameter bitmap, the second parameter bitmap, the SMTC, or the SSB bitmap to generate the measurements associated with at least the subset of the measured SSBs.

27. The method according to claim 26, wherein A bit in each of the first parameter bitmap P1 and the second parameter bitmap P2 indicates whether an SSB is expected in a particular time slot, and the pruning the measurement associated with the measured SSB comprises: removing, based on the first parameter bitmap P1, measurements associated with SSBs received from the serving cell in time slots not indicated as desired SSBs; and Based on an intersection P2∩SMTC of the second parameter bitmap P2 and the SMTC, measurements associated with SSBs received from the at least one neighboring cell in time slots not indicated as desired SSBs are removed.

28. The method according to claim 18, wherein The at least one neighboring cell is not synchronized with the serving cell, and the determining the search window further comprises: determining the search window based on both the first parameter bitmap P1 and the SMTC.

29. An apparatus for performing wireless communication at a user equipment (UE), comprising: means for determining a parameter set associated with receiving a synchronization signal block SSB, the parameter set comprising a first parameter bitmap P1 associated with a serving cell, a second parameter bitmap P2 associated with at least one neighboring cell, and an SSB measurement timing configuration SMTC; means for determining a search window for searching for a received SSB based on the SMTC and at least one of the first parameter bitmap P1 or the second parameter bitmap P2; means for measuring an SSB searched during a determined search window; as well as Means for transmitting measurement results associated with at least a subset of the measured SSBs to a base station.

30. A computer readable medium storing computer executable code at a user equipment (UE), the code, when executed by a processor of the UE, causing the processor to: Determining a parameter set associated with receiving a synchronization signal block SSB, the parameter set comprising a first parameter bitmap P1 associated with a serving cell, a second parameter bitmap P2 associated with at least one neighboring cell, and an SSB measurement timing configuration SMTC; determining a search window for searching for the received SSB based on the SMTC and at least one of the first parameter bitmap P1 or the second parameter bitmap P2; Measuring the SSBs found during the determined search window; as well as Measurement results associated with at least a subset of the measured SSBs are sent to a base station.

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