New radio resynchronization signal

Abstract

Aspects provide for wireless communication between a UE and a radio access network (RAN) node in a wireless communication network. The RAN node can generate a resynchronization signal (RSS) for a bandwidth part (BWP) of a plurality of BWPs and transmit the RSS to the UE in the BWP of the downlink. A first bandwidth of the RSS can be based on a second bandwidth of the BWP. The UE can receive the RSS in different RRC states and perform measurements of the RSS for synchronization, for early detection of a paging or wake-up signal, and / or for radio resource management (RRM) measurements or radio link monitoring (RLM) measurements. The UE can utilize a communication link with the RAN node based on the measurements, and the RAN node can utilize the communication link to communicate with a group of UEs that share at least one same RSS beam.

Description

[0001] Cross Reference to Related Applications

[0002] This Patent Application claims priority to and the benefit of non-provisional application No. 17 / 374,763 filed in the United States Patent Office on July 13, 2021, and provisional application No. 63 / 054,156 filed in the United States Patent Office on July 20, 2020, which are assigned to the assignee of the present application and hereby expressly incorporated by reference herein in their entirety as if fully set forth below and for all applicable purposes. TECHNICAL FIELD

[0003] The technology discussed below relates generally to wireless communication networks, and more specifically, to synchronization and measurement techniques between a user equipment and a base station. BACKGROUND

[0004] In a fifth generation (5G) wireless communication network, such as a New Radio (NR) wireless communication network, a user equipment (UE) can perform a cell search to acquire time and frequency synchronization with a cell and to identify a physical cell identity (PCI) of the cell. The PCI can be carried in a primary synchronization signal (PSS) and a secondary synchronization signal (SSS) in a synchronization signal block (SSB). The SSB, which includes the PSS, the SSS, and a physical broadcast control channel (PBCH), can be transmitted, for example, over four symbols in the time domain and 240 subcarriers in the frequency domain. The PSS and SSS sequences can be mapped to the first and third symbols of the SSB and can occupy the center 12 resource blocks (RBs). Multiple SSBs can be transmitted within an SSB burst and each SSB can be beamformed towards a preconfigured direction. The maximum number of SSBs within an SSB burst can depend on the frequency range.

[0005] In current NR specifications, a base station can configure a measurement gap for a UE to perform SSB-based radio resource management (RRM) / radio link monitoring (RLM) measurements. The use of measurement gaps in NR can depend on the UE’s capability, the UE’s active bandwidth part (BWP), and the current operating frequency. In NR, measurement gaps can be used for intra-frequency, inter-frequency, and inter-RAT measurements. In some cases, intra-frequency measurements in NR can use measurement gaps, for example, if the intra-frequency measurements are to be made outside of the active BWP. Current NR specifications can not be suitable for UE capabilities that include BWP resource allocation capabilities and can be overly complex for handling measurement gaps and PBCH decoding. SUMMARY

[0006] The following presents a summary of one or more aspects of the disclosure in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects of the disclosure in a form that is brief enough to present a continued

[0007] A method for wireless communication at a user equipment (UE) in a wireless communication network is provided. The method includes receiving a resynchronization signal (RSS) from a radio access network (RAN) node in a downlink (DL) bandwidth part (BWP) of a plurality of BWPs. A first bandwidth and a first time duration of the RSS can be based on a second bandwidth and a second time duration of the DL BWP. The method further includes performing a measurement of the RSS, the method further including utilizing a communication link with the RAN node based on the measurement.

[0008] A method for wireless communication at a radio access network (RAN) node in a wireless communication network is provided. The method includes generating a resynchronization signal (RSS) for a bandwidth part (BWP) of a plurality of BWPs. The method further includes transmitting the RSS in the BWP of a downlink (DL) to a user equipment (UE). A first bandwidth of the RSS can be based on a second bandwidth of the BWP. The method further includes utilizing a communication link with the UE based on the RSS. The utilizing the communication link with the UE based on the RSS includes at least one of receiving a measurement report from the UE based on a measurement of the RSS, receiving an indication from the UE regarding an adjustment to a tracking loop based on the measurement of the RSS, or receiving an indication from the UE regarding an update to one or more reception or transmission parameters based on the measurement of the RSS.

[0009] A wireless communication device in a radio access network (RAN) of a wireless communication system is provided. The wireless communication device includes a wireless transceiver, a memory, and a processor. The processor is communicatively coupled to the wireless transceiver and the memory. The processor is configured to receive a resynchronization signal (RSS) from a radio access network (RAN) node in a downlink (DL) bandwidth part (BWP) of a plurality of BWPs. A first bandwidth and a first time duration of the RSS can be based on a second bandwidth and a second time duration of the DL BWP. The processor is further configured to perform a measurement of the RSS. The processor is further configured to utilize a communication link with the RAN node based on the measurement.

[0010] A radio access network (RAN) node is provided in a wireless communication system. The RAN node includes: a radio transceiver; a memory; and a processor. The processor is communicatively coupled to the radio transceiver and the memory. The processor is configured to generate a resynchronization signal (RSS) for a BWP in multiple bandwidth portions (BWPs). The processor is also configured to transmit the RSS to a user equipment (UE) in the BWP of a downlink (DL). A first bandwidth of the RSS may be based on a second bandwidth of the BWP. The processor is further configured to utilize a communication link with the UE based on the RSS. Utilizing the communication link with the UE based on the RSS includes at least one of the following: receiving from the UE a measurement report based on a measurement of the RSS; receiving from the UE an indication of adjustment of a tracking loop based on the measurement of the RSS; or receiving from the UE an indication of an update of one or more receive or transmit parameters based on the measurement of the RSS.

[0011] These and other aspects will become more fully understood after reviewing the following detailed description. Other aspects, features, and embodiments will become apparent to those skilled in the art after reviewing the following description of specific exemplary embodiments in conjunction with the accompanying drawings. While features may be discussed below with respect to certain embodiments and drawings, all embodiments may include one or more of the advantageous features discussed herein. In other words, while one or more embodiments may be discussed as having certain advantageous features, one or more such features may also be used according to the various embodiments discussed herein. Similarly, while exemplary embodiments may be discussed below as embodiments of devices, systems, or methods, such exemplary embodiments may be implemented in various devices, systems, and methods. Attached Figure Description

[0012] Figure 1 It is a schematic diagram of a wireless communication system based on some aspects.

[0013] Figure 2 It is a conceptual diagram based on some aspects of radio access networks.

[0014] Figure 3 This is a diagram illustrating an example of a frame structure for use in radio access networks, based on some aspects.

[0015] Figure 4 This is a block diagram illustrating a wireless communication system that supports beamforming and / or multiple-input multiple-output (MIMO) communication according to some aspects.

[0016] Figure 5 is a diagram illustrating communication between a radio access network (RAN) node and a wireless communication device using downlink beamformed signals, in accordance with some aspects.

[0017] Figure 6 is a signaling diagram illustrating example signaling for generating and utilizing a resynchronization signal (RSS) in a wireless communication network, in accordance with some aspects.

[0018] Figure 7A is a diagram illustrating example circuitry within a base station for generating a RSS, in accordance with some aspects.

[0019] Figure 7B is a diagram illustrating example relationships between RSS measurements, in accordance with some aspects.

[0020] Figure 8 illustrates an example diagram of a spreading sequence, in accordance with some aspects.

[0021] Figure 9 illustrates an example diagram of an OFDM symbol index, in accordance with some aspects.

[0022] Figure 10 illustrates an example diagram of a RSS, in accordance with some aspects.

[0023] Figure 11 is a conceptual diagram illustrating an example of a hardware implementation for an example RAN node employing a processing system, in accordance with some aspects.

[0024] Figure 12 is a flow diagram of a method of generating and utilizing a RSS in a wireless communication system, in accordance with some aspects.

[0025] Figure 13 is a flow diagram of a method of generating and utilizing a RSS in a wireless communication system, in accordance with some aspects.

[0026] Figure 14 is a block diagram illustrating an example of a hardware implementation for a wireless communication device employing a processing system, in accordance with some aspects.

[0027] Figure 15 is a flow diagram of a method of receiving and utilizing a RSS in a wireless communication system, in accordance with some aspects.

[0028] Figure 16 is a flow diagram of a method of receiving and utilizing a RSS in a wireless communication system, in accordance with some aspects. DETAILED DESCRIPTION

[0029] The detailed description set forth below, in connection with the appended drawings, is intended as a description of various configurations and is not intended to represent the only configurations in which the concepts described herein can be practiced. The detailed description includes specific details for the purpose of providing a thorough understanding of various concepts. However, it will be apparent to those skilled in the art that these concepts can be practiced without these specific details. In some instances, well-known structures and components are shown in block diagram form in order to avoid obscuring such concepts.

[0030] The electromagnetic spectrum is often subdivided based on frequency / wavelength into various classes, bands, channels, and so forth. In 5G NR, two initial operating bands have been identified as frequency range designations FR1 (410 MHz - 7.125 GHz) and FR2 (24.25 GHz - 52.6 GHz). It will be appreciated that, although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to in various documents and articles as a “Sub- 6 GHz” band. A similar nomenclature issue sometimes occurs with regard to FR2, which is often (interchangeably) referred to in documents and articles as a “millimeter wave” band despite being different from the extremely high frequency (EHF) band (30 GHz - 300 GHz) which is identified by the International Telecommunications Union (ITU) as a “millimeter wave” band.

[0031] The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Recent 5G NR studies have identified operating bands for these mid-band frequencies as frequency range designation FR3 (7.125 GHz - 24.25 GHz). Bands falling within FR3 can inherit FR1 and / or FR2 characteristics and, as such, can effectively extend the characteristics of FR1 and / or FR2 to mid-band frequencies. Additionally, even higher bands are currently under exploration to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4-a or FR4-1 (52.6 GHz - 71 GHz), FR4 (52.6 GHz - 114.25 GHz), and FR5 (114.25 GHz - 300 GHz). Each of these higher bands falls within the EHF band.

[0032] With the above in mind, unless specifically stated otherwise, it should be understood that the term “Sub-6 GHz” or the like is used interchangeably with the term “6 GHz” or the like herein can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. Further, unless specifically stated otherwise, it should be understood that the term “millimeter wave” or the like is used interchangeably with the term “mmW” or the like herein can broadly represent frequencies that can include mid-band frequencies, can be within FR2, FR4, FR4-a or FR4-1, and / or FR5, or can be within the EHF band.

[0033] While aspects and embodiments are described herein by way of example, those skilled in the art will understand that additional implementations and use cases can arise in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and package arrangements. For example, embodiments and / or uses can arise via integrated chip embodiments and other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, AI-enabled devices, etc.). While some examples may or may not be specific to a particular use case or application, a wide variety of applicability to the described innovations can exist. Implementations can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or OEM devices or systems incorporating one or more aspects of the described innovations. In some practical settings, devices incorporating the described aspects and features may also necessary include additional components and features for the implementation and practice of the claimed and described embodiments. For example, the transmission and reception of wireless signals necessarily involve multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / accumulators, etc.). The innovations described herein are intended to be implemented in a variety of devices, chip-level components, systems, distributed arrangements, aggregated and decomposed arrangements, end-user devices, etc., with different sizes, shapes, and constructions.

[0034] The various concepts presented throughout this disclosure can be implemented across a wide range of telecommunications systems, network architectures, and communication standards. See now for reference. Figure 1 As an example and not a limitation, various aspects of this disclosure are illustrated with reference to a wireless communication system 100. The wireless communication system 100 includes three interaction domains: a core network 102, a radio access network (RAN) 104, and a user equipment (UE) 106. With the aid of the wireless communication system 100, the UE 106 is capable of performing data communication with an external data network 110 (such as, but not limited to, the Internet).

[0035] The RAN 104 can implement any one or more suitable wireless communication techniques to provide radio access to the UEs 106. As one example, the RAN 104 can operate according to 3rd Generation Partnership Project (3GPP) New Radio (NR) specifications, often referred to as 5G. As another example, the RAN 104 can operate according to a hybrid of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, often referred to as Long Term Evolution (LTE). The 3GPP refers to this hybrid RAN as a Next Generation RAN, or NG-RAN. Of course, many others are possible and within the scope of the present disclosure.

[0036] As illustrated, the RAN 104 includes a plurality of base stations 108. Broadly, a base station is a network element in a radio access network that carries out the radio transmission and reception for a cell in one or more carrier frequencies. In different technologies, standards, or contexts, a base station can variously be referred to as a base transceiver station (BTS), a radio base station, a radio transceiver, a transceiver function, a basic service set (BSS), an extended service set (ESS), an access point (AP), a Node-B (NB), an eNode-B (eNB), a gNode-B (gNB), a transmission and reception point (TRP), or some other suitable terminology. In some examples, a base station can include two or more TRPs that can be co-located or non-co-located. Each TRP can communicate on the same or different carrier frequencies. In examples where the RAN 104 operates according to both LTE and 5G NR standards, one of the base stations can be an LTE base station while another base station can be a 5G NR base station.

[0037] The RAN 104 is also illustrated supporting wireless communication for multiple mobile apparatuses. A mobile apparatus can be referred to as user equipment (UE) in 3GPP standards, but can also be referred to by those skilled in the art as a mobile station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communications device, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other suitable terminology. A UE can be a device that provides access to network services for a user.

[0038] Within the present disclosure, a “mobile” device need not necessarily have a capability to move, and it can be stationary. The term mobile device or mobile equipment refers broadly to various devices and technologies. UE can include multiple hardware structural components sized, shaped, and arranged to facilitate communication; such components can include antennas, antenna arrays, RF chains, amplifiers, one or more processors, etc. in electrical communication with one another. For example, some non-limiting examples of a mobile device include a mobile, a cellular (cell) phone, a smart phone, a session initiation protocol (SIP) phone, a laptop, a personal computer (PC), a notebook, a netbook, a smartbook, a tablet, a personal digital assistant (PDA), and a broad array of embedded systems, e.g., corresponding to an Internet of Things (IoT).

[0039] Additionally, a mobile device can be an automotive or other transportation vehicle, a remote sensor or actuator, a robot or robotized device, a satellite radio, a global positioning system (GPS) device, an object tracking device, a drone, a multi-copter, a quad-copter, a remote control device, a consumer device such as a wearable device, a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (e.g., MP3 player), a camera, a game console, etc. Additionally, a mobile device can be a digital home or smart home device, such as a home audio, video, and / or multimedia device, a domestic appliance, a vending machine, intelligent lighting, a home security system, a smart meter, etc. Additionally, a mobile device can be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device controlling electric power (e.g., smart grid), lighting, water, etc., an industrial automation and enterprise device, a logistics controller and / or agricultural equipment, etc. Additionally, a mobile device can provide for connected medicine or telemedicine support (e.g., health care at a distance). Telehealth devices can include telehealth monitoring devices and telehealth administration devices, whose communication can be given preferential treatment or prioritized access with respect to other types of information, e.g., in terms of prioritized access for transport of critical service data, and / or related QoS for transport of critical service data.

[0040] Fifth generation (5G) wireless communication networks, such as New Radio (NR) wireless communication networks, support communication between base stations and high-end UEs for a variety of different use cases, including, for example, enhanced mobile broadband (eMBB) and ultra-reliable and low-latency communications (URLLC). NR networks can also support communication between base stations and low-end UEs 106 for massive machine type communication (mMTC) use cases. In some examples, LTE-M or narrowband Internet of Things (NB-IoT) technologies can be used to meet the requirements of mMTC.

[0041] In addition to providing services to high-end UEs 106 (e.g., via eMBB and / or URLLC) and low-end UEs 106 (e.g., via mMTC), a NR network can also provide services to reduced-capability UEs 106. The service requirements for reduced-capability UEs can be less than high-end UEs but greater than low-end UEs. For example, use cases for reduced-capability UEs can include not only URLLC services with high requirements, but also low-end services to accommodate smaller form factors and longer battery life. Examples of reduced-capability UEs can include, but are not limited to, industrial wireless sensors, surveillance cameras, and wearable devices (e.g., smart watches, rings, electronic health-related devices, and medical monitoring devices). In general, reduced-capability UEs have device designs that include compact form factors and reduced complexity as compared to high-end UEs. For example, reduced-capability UEs can have a reduced number of transmit / receive antennas, a reduced device bandwidth (e.g., a reduced operating bandwidth of the UE), relaxed processing time, and / or relaxed processing capability. Reduced-capability UEs can also be configured for power saving and battery life enhancement in delay-tolerant use cases.

[0042] In certain aspects, a UE can be a reduced-capability (RedCap) UE with relaxed peak throughput, latency, and reliability requirements. To achieve power saving, a RedCap UE can switch to a narrow-band bandwidth part (BWP) and remain in a discontinuous reception (DRX) mode. The RedCap UE can hop to a BWP that does not include an SSB to compensate for coverage loss due to its reduced capability.

[0043] A particular service (e.g., eMBB / URLLC / mMTC / reduced capability) provided to a UE can be determined based on a UE category of the UE. UE category information is used to enable a base station to efficiently communicate with each UE served by the base station. For example, a UE category can identify uplink and downlink performance capabilities of the UE. As one example, a UE category can specify a maximum data rate supported by the UE, a number of component carriers and multiple-input multiple-output (MIMO) layers supported by the UE, and / or a highest modulation supported by the UE. The examples of UE category differentiation items presented herein are merely exemplary, and it should be understood that any suitable difference between UE features, whether hardware or software, can be used to differentiate between UE categories.

[0044] Wireless communication between RAN 104 and UE 106 can be described as utilizing an air interface. Transmissions over the air interface from a base station (e.g., base station 108) to one or more UEs (e.g., UE 106) can be referred to as downlink (DL) transmissions. According to certain aspects of this disclosure, the term downlink can refer to point-to-multipoint transmissions originating from a base station (e.g., base station 108). Another way to describe this scheme is to use the term broadcast channel multiplexing. Transmissions from a UE (e.g., UE 106) to a base station (e.g., base station 108) can be referred to as uplink (UL) transmissions. According to other aspects of this disclosure, the term uplink can refer to point-to-point transmissions originating from a UE (e.g., UE 106).

[0045] In some examples, access to the air interface can be scheduled, where a scheduling entity (e.g., base station 108) allocates resources for communication among some or all devices and apparatuses within its service area or cell. As further discussed below in this disclosure, the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities (e.g., UE 106). That is, for scheduled communication, multiple UEs 106 (which may be scheduled entities) can use the resources allocated by the scheduling entity 108.

[0046] Base station 108 is not the only entity that can act as a scheduling entity. That is, in some examples, a UE can act as a scheduling entity, scheduling resources for one or more scheduled entities (e.g., one or more other UEs). For example, a UE can communicate directly with other UEs in a peer-to-peer or device-to-device manner and / or in a relay configuration.

[0047] like Figure 1 As shown, scheduling entity 108 can broadcast downlink service 112 to one or more scheduled entities (e.g., one or more UEs 106). Broadly speaking, scheduling entity 108 is a node or device responsible for scheduling services (including downlink service 112, and in some examples, uplink service 116 from one or more scheduled entities (e.g., one or more UEs 106) to scheduling entity 108) in a wireless communication network. On the other hand, a scheduled entity (e.g., UE 106) is a node or device that receives downlink control information 114 (including but not limited to scheduling information (e.g., grants), synchronization or timing information, or other control information) from another entity in the wireless communication network (such as scheduling entity 108).

[0048] Additionally, uplink and / or downlink control information and / or service information can be transmitted on a waveform, which can be time-divided into frames, subframes, time slots, and / or symbols. As used herein, a symbol can refer to a time unit carrying one resource element (RE) per subcarrier in an Orthogonal Frequency Division Multiplexing (OFDM) waveform. A time slot can carry 7 or 14 OFDM symbols. A subframe can refer to a duration of 1 ms. Multiple subframes or time slots can be grouped together to form a single frame or radio frame. Within this disclosure, a frame can refer to a predetermined duration (e.g., 10 ms) for radio transmission, where each frame consists of, for example, 10 subframes, each 1 ms in length. Of course, these definitions are not mandatory, and any suitable scheme for organizing the waveform can be utilized, and various time divisions of the waveform can have any suitable duration.

[0049] Typically, base station 108 may include a backhaul interface for communication with the backhaul portion 120 of wireless communication system 100. Backhaul portion 120 provides a link between base station 108 and core network 102. Furthermore, in some examples, the backhaul network may provide interconnection between corresponding base stations 108. Various types of backhaul interfaces can be employed, such as direct physical connections, virtual networks, or backhaul interfaces using any suitable transport network.

[0050] Core network 102 may be part of wireless communication system 100 and may be independent of the radio access technology used in RAN 104. In some examples, core network 102 may be configured according to 5G standards (e.g., 5GC). In other examples, core network 102 may be configured according to 4G Evolved Packet Core (EPC) or any other suitable standard or configuration.

[0051] Now refer to Figure 2 The diagram of RAN 200 is provided through examples rather than limitations. In some examples, RAN 200 can be related to the above-described and... Figure 1 The same as RAN 104 shown in the figure.

[0052] The geographical area covered by RAN 200 can be divided into multiple cellular areas (cells), and user equipment (UE) can uniquely identify these cellular areas (cells) based on an identifier broadcast from an access point or base station within the geographical area. Figure 2Cells 202, 204, 206, and 208 are shown, each of which can include one or more sectors (not shown). A sector is a sub-area of a cell. All sectors of one cell are served by the same base station. A radio link within a sector can be identified by a single logical identity belonging to that sector. In a cell divided into sectors, multiple sectors within a cell can be formed by multiple sets of antennas, where each set of antennas is responsible for communicating with UEs in a portion of the cell.

[0053] Various base station arrangements can be utilized. For example, in Figure 2 two base stations (base station 210 and base station 212) are shown in cells 202 and 204. A third base station (base station 214) is shown controlling a remote radio head (RRH) 216 in cell 206. That is, a base station can have integrated antennas, or can be connected to antennas or RRH 216 through feeder cables. In the example shown, cells 202, 204, and 206 can be referred to as macro cells, as base stations 210, 212, and 214 support cells having a large size. Further, base station 218 is shown in cell 208, which can overlap with one or more macro cells. In this example, cell 208 can be referred to as a small cell (e.g., small cell, microcell, picocell, femtocell, home base station, home nodeB, home eNodeB, etc.), as base station 218 supports a cell having a relatively small size. Cell size can be set according to system design, as well as component constraints.

[0054] It is to be understood that RAN 200 can include any number of wireless base stations and cells. Further, relay nodes can be deployed to extend the size or coverage area of a given cell. Base stations 210, 212, 214, 218 provide wireless access points to a core network for any number of mobile apparatuses. In some examples, base stations 210, 212, 214, and / or 218 can be the same as or similar to scheduling entity 108 described above and illustrated in FIG. 1. Figure 1

[0055] Figure 2 Also included is an unmanned aerial vehicle (UAV) 220, which can be a drone or quadcopter. UAV 220 can be configured to act as a base station, or more specifically, as a mobile base station. That is, in some examples, a cell can not necessarily be stationary, and the geographic area of a cell can move according to the location of a mobile base station, such as UAV 220.

[0056] ​Within the RAN 200, a cell can include UEs that can be in communication with one or more sectors of each cell. Moreover, each base station 210, 212, 214, 218, and 220 can be configured to provide an access point to a core network 102 (see Figure 1 ) for all the UEs in a corresponding cell. For example, UEs 222 and 224 can be in communication with base station 210; UEs 226 and 228 can be in communication with base station 212; UEs 230 and 232 can be in communication with base station 214 by way of RRHs 216; UE 234 can be in communication with base station 218; and UE 236 can be in communication with mobile base station 220. In some examples, UEs 222, 224, 226, 228, 230, 232, 234, 236, 238, 240, and / or 242 can be the same as or similar to UE / scheduled entity 106 described above and illustrated in FIG. 1, as well as in FIGS. 2-3, 5, and / or 7-8, by way of Figure 1 In some examples, UAV 220 (e.g., quadcopter drone) can be a mobile network node and can be configured to act as a UE. For example, UAV 220 can operate in cell 202 by communicating with base station 210.

[0057] In additional aspects of the RAN 200, sidelink signals can be used between UEs without necessarily relying on scheduling or control information from a base station. Sidelink communication can be utilized in a device-to-device (D2D) network, peer-to-peer (P2P) network, vehicle-to-vehicle (V2V) network, vehicle-to-everything (V2X) network, and / or other suitable sidelink network. For example, two or more UEs (e.g., UEs 238, 240, and 242) can communicate with one another using sidelink signals 237 without the need for relaying that communication through a base station. In some examples, UEs 238, 240, and 242 can each act as a scheduling entity or transmitting sidelink device and / or a scheduled entity or receiving sidelink device to schedule resources and communicate sidelink signals 237 therebetween without relying on scheduling or control information from a base station. In other examples, two or more UEs (e.g., UEs 226 and 228) within the coverage area of a base station (e.g., base station 212) can also communicate sidelink signals 227 over a direct link (sidelink) without the need for relaying that communication through base station 212. In this example, base station 212 can allocate resources for sidelink communication to UEs 226 and 228.

[0058] To enable transmissions over the air interface to achieve a low block error rate (BLER) while still achieving very high data rates, channel coding can be used. That is, wireless communication can generally use an appropriate error correcting block code. In a typical block code, an information message or sequence is divided into code blocks (CBs), and an encoder (e.g., a CODEC) at the transmitting device then mathematically adds redundancy to the information message. Exploitation of this redundancy in the encoded information message can improve the reliability of the message, enabling correction for any bit errors that can occur due to noise.

[0059] Data encoding can be implemented in a variety of ways. In early 5G NR specifications, user data is encoded using quasi-cyclic low-density parity check (LDPC) with two different base graphs: one base graph is used for large code blocks and / or high code rates, while another base graph is used otherwise. Control information and physical broadcast channel (PBCH) are encoded using polar coding, based on nested sequences. For these channels, puncturing, shortening, and repetition are used for rate matching.

[0060] Aspects of the present disclosure can utilize any appropriate channel code for implementation. Various implementations of base stations and UEs can include appropriate hardware and capabilities (e.g., encoders, decoders, and / or CODECs) for wireless communication utilizing one or more of these channel codes.

[0061] In the RAN 200, the ability for a UE to communicate while moving, independent of its location, is referred to as mobility. The various physical channels described herein can be established through the access and mobility management function (AMF) 230. In some scenarios, the AMF 230 can include a security context management function (SCMF) and a security anchor function (SEAF) for authentication. The SCMF can manage, in whole or in part, security contexts for both the control plane and the user plane functions.

[0062] In various aspects of the disclosure, the RAN 200 can use DL-based mobility, or UL-based mobility, to enable mobile and handover (i.e., the transfer of a UE's connection from one wireless channel to another). In a network configured for DL-based mobility, a UE can monitor various parameters of the signal from its serving cells, as well as various parameters of neighboring cells, during a call with a scheduling entity, or at any other time. Based on the quality of these parameters, the UE can maintain communications with one or more of the neighboring cells. If the UE moves from one cell to another while this is happening, or if the signal quality from a neighboring cell becomes better than that of the serving cell for a given amount of time, the UE can perform a handoff or handover from the serving cell to the neighboring (target) cell. For example, the UE 224 can move from the geographic region corresponding to its serving cell 202 to the geographic region corresponding to a neighbor cell 206. When the signal strength or quality from the neighbor cell 206 exceeds that of its serving cell 202 for a given amount of time, the UE 224 can send a reporting message to its serving base station 210 indicating this condition. In response, the UE 224 can receive a handover command, and the UE can hand over to cell 206.

[0063] In a network configured for UL-based mobility, the network can utilize UL reference signals from each UE to select a serving cell for each UE. In some examples, the base stations 210, 212, and 214 / 216 can broadcast unified synchronization signals (e.g., unified Primary Synchronization Signals (PSSs), unified Secondary Synchronization Signals (SSSs), and unified Physical Broadcast Channels (PBCHs)). The UEs 222, 224, 226, 228, 230, and 232 can receive the unified synchronization signals, derive the carrier frequency and timing from the synchronization signals, and in response to deriving timing, transmit uplink pilot or reference signals. The uplink pilot signals transmitted by a UE (e.g., UE 224) can be received by two or more cells (e.g., base stations 210 and 214 / 216) in the RAN 200 concurrently. Each of the cells can measure a strength of the pilot signals, and the radio access network (e.g., one or more of the base stations 210 and 214 / 216 and / or a central node within the core network) can determine a serving cell for the UE 224. As the UE 224 moves through the RAN 200, the RAN 200 can continue monitoring the uplink pilot signals transmitted by the UE 224. When the signal strength or quality of the pilot signals measured by a neighboring cell exceeds that of the signal strength or quality measured by the serving cell, the RAN 200 can handover the UE 224 from the serving cell to the neighboring cell, with or without notifying the UE 224.

[0064] While the synchronization signals transmitted by the base stations 210, 212, and 214 / 216 can be unified, the synchronization signals can not identify a particular cell, but rather can identify a zone of multiple cells operating on the same frequency and / or using the same timing. The use of zones in 5G or other next generation communication networks enables the uplink-based mobility framework and improves the efficiency of both the UE and the network, since the number of mobility messages that need to be exchanged between the UE and the network can be reduced.

[0065] In various implementations, the air interface in the radio access network 200 can utilize licensed spectrum, unlicensed spectrum, or shared spectrum. Licensed spectrum provides for exclusive use of a portion of the spectrum to one or more licensees. Unlicensed spectrum is available for use by any operator without the need for a government-granted license. However, because the use of the unlicensed spectrum is unregulated, there can be contention between operators that use the unlicensed spectrum. Shared spectrum can fall between licensed and unlicensed spectrums, where use of a portion of the spectrum is granted to multiple operators, but use of the spectrum is regulated in some manner (e.g., according to certain rules, regulations, standards, specifications, or the like).

[0066] Devices communicating in the radio access network 200 can utilize one or more multiplexing techniques and multiple access algorithms to enable simultaneous communication of the various devices. For example, the 5G NR specification utilizes orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) for downlink (DL) and uplink (UL) transmissions between the base stations 210 and the UEs 222 and 224. Additionally, for UL transmissions, the 5G NR specification provides support for discrete Fourier transform-spread-OFDM (DFT-s-OFDM) with a CP (also referred to as single-carrier FDMA (SC-FDMA)). However, multiplexing and multiple access in the scope of the disclosure is not limited to the above schemes, and can be provided using time division multiple access (TDMA), code division multiple access (CDMA), frequency division multiple access (FDMA), sparse code multiple access (SCMA), resource spread multiple access (RSMA), or other appropriate multiple access schemes. Further, multiplexing for DL transmissions from the base station 210 to the UEs 222 and 224 can be provided using time division multiplexing (TDM), code division multiplexing (CDM), frequency division multiplexing (FDM), orthogonal frequency division multiplexing (OFDM), sparse code multiplexing (SCM), or other appropriate multiplexing schemes.

[0067] Devices in radio access network 200 can also utilize one or more duplex algorithms. Duplex refers to a point-to-point communication link where both endpoints can communicate with one another. Full-duplex means both endpoints can communicate with one another at the same time. Half-duplex means only one endpoint can send information to the other at a time. Half-duplex emulation is often implemented for wireless links utilizing time-division duplex (TDD). In TDD, transmissions in different directions on a given channel are separated in time. That is, at some times the channel is dedicated for transmissions in one direction, while at other times the channel is dedicated for transmissions in the other direction, where the direction can change very rapidly (e.g., several times per time slot). In wireless links, full-duplex channels typically rely on physical isolation of the transmitter and receiver and suitable interference cancelation techniques. Full-duplex emulation is often implemented for wireless links by utilizing frequency-division duplex (FDD) or space-division duplex (SDD). In FDD, transmissions in different directions can operate at different carrier frequencies (e.g., within paired spectrum). In SDD, transmissions in different directions on a given channel are separated from one another using spatial division multiplexing (SDM). In other examples, full-duplex communication can be implemented within unpaired spectrum (e.g., within a single carrier bandwidth), where transmissions in different directions occur within different sub-bands of the carrier bandwidth. This type of full-duplex communication can be referred to herein as sub-band full duplex (SBFD), also known as flexible duplex.

[0068] Various aspects of the disclosure will be described in reference to OFDM waveforms, which are schematically illustrated in Figure 3 Those skilled in the art will understand that the various aspects of the disclosure can be applied to SC-FDMA waveforms in substantially the same manner as described herein below. That is, while some examples of the disclosure can focus on OFDM links for clarity, it will be understood that the same principles can be applied to SC-FDMA waveforms as well.

[0069] Reference is now made to Figure 3 , which shows a spread view of an exemplary subframe 302, illustrating an OFDM resource grid. However, as those skilled in the art will readily appreciate, the PHY transmission structure for any particular application can differ from this example described here, depending on a number of factors. Here, time is on the horizontal

[0070] The resource grid 304 can be used to schematically represent time-frequency resources for a given antenna port. That is, in a multiple-input multiple-output (MIMO) implementation with multiple available antenna ports, a corresponding multiple number of resource grids 304 can be available for communication. The resource grid 304 is divided into multiple resource elements (REs) 306. An RE, which is 1 subcarrier x 1 symbol, is the smallest discrete part of the time-frequency grid, and contains a single complex value representing data from a physical channel or signal. Depending on the modulation, each RE can represent one or more bits of information. In some examples, a block of REs can be referred to as a physical resource block (PRB) or more simply a resource block (RB) 308, which contains any suitable number of consecutive subcarriers in the frequency domain. In one example, a RB can include 12 subcarriers, a number independent of the numerology used. In some examples, depending on the numerology, a RB can include any suitable number of consecutive OFDM symbols in the time domain. Within the present disclosure, it is assumed that a single RB such as the RB 308 entirely corresponds to a single direction of communication (transmit or receive direction for a given device).

[0071] Consecutive or non-consecutive sets of resource blocks can be referred to herein as resource block groups (RBGs), sub-bands, or bandwidth parts (BWPs). A set of sub-bands or BWPs can span the entire bandwidth. Scheduling a scheduled entity (e.g., a UE) for downlink, uplink, or sidelink transmission typically involves scheduling one or more resource elements 306 within one or more sub-bands or bandwidth parts (BWPs). Thus, a UE typically utilizes only a subset of the resource grid 304. In some examples, an RB can be the smallest unit of resources that can be assigned to a UE. Thus, the more RBs scheduled for a UE and the higher the modulation scheme chosen for the air interface, the higher the data rate for the UE. RBs can be scheduled by a base station (e.g., gNB, eNB, etc.) or can be self-scheduled by a UE implementing D2D sidelink communication.

[0072] In this diagram, the RB 308 is shown as occupying less than the entire bandwidth of the subframe 302, with some subcarriers shown above and below the RB 308. In a given implementation, the subframe 302 can have a bandwidth corresponding to any number of one or more RBs 308. Also, in this diagram, while the RB 308 is shown as occupying less than the entire duration of the subframe 302, this is merely one possible example.

[0073] Generally, a BWP is configured as a subset or a portion of the total carrier bandwidth. A BWP forms a contiguous set of common resource blocks (CRBs) within the overall component carrier bandwidth. In other words, within a carrier bandwidth, a BWP starts from a CRB and can span a contiguous set of CRBs. Each BWP can be associated with its own numerology (subcarrier spacing (SCS) and cyclic prefix (CP)). A UE can be configured with up to four downlink BWPs and up to four uplink BWPs for each serving cell. In the case of a supplemental uplink (SUL), there can be up to four additional uplink BWPs on the SUL carrier.

[0074] To enable reasonable UE battery consumption, under typical operation, only one BWP in the downlink and one BWP in the uplink are active at a given time on an active serving cell. The active BWP defines the operating bandwidth of the UE within the operating bandwidth of the cell, and the UE is configured with all other BWPs deactivated. On the deactivated BWPs, the UE does not transmit or receive any data.

[0075] Each 1 ms subframe 302 can be composed of one or more adjacent slots. In the example shown in FIG. 3, a subframe 302 includes four slots 310, as an illustrative example. In some examples, a slot can be defined in terms of a specified number of OFDM symbols having a given cyclic prefix (CP) length. For example, a slot can include 7 or 14 OFDM symbols with a nominal CP. Further examples can include mini-slots (sometimes referred to as shortened transmission time intervals (TTIs)) having a shorter duration (e.g., one to three OFDM symbols). In some cases, these mini-slots or shortened transmission time intervals (TTIs) can be transmitted occupying resources that are scheduled for an ongoing slot transmission for the same or different UE. Any number of resource blocks can be utilized within a subframe or slot. Figure 3

[0076] An expanded view of one of the slots 310 illustrates that the slot 310 includes a control region 312 and a data region 314. Generally, the control region 312 can carry control channels, and the data region 314 can carry data channels. Of course, the slot can contain all DL, all UL, or at least one DL part and at least one UL part. In Figure 3 The structure shown in FIG. 3 is merely exemplary in nature, and different slot structures can be utilized, and different slot structures can include one or more regions in each of control and data regions.

[0077] Although in Figure 3 ​Although not shown, various REs 306 within the RB 308 can be scheduled to carry one or more physical channels, including control channels, shared channels, data channels, and so on. Other REs 306 within the RB 308 can also carry pilots or reference signals. These pilots or reference signals can provide for a receiving device to perform channel estimation so as to achieve coherent demodulation / detection of the control and / or data channels within the RB 308.

[0078] In some examples, the time slots 310 can be used for broadcast, multicast, groupcast, or unicast communications. For example, a broadcast, multicast, or groupcast communication can refer to a point-to-multipoint transmission by one device (e.g., a base station, UE, or other similar device) to other devices. Here, a broadcast communication is delivered to all devices, while a multicast or groupcast communication is delivered to multiple intended recipient devices. A unicast communication can refer to a point-to-point transmission by one device to a single other device.

[0079] In examples of cellular communications over a cellular carrier via a Uu interface, for DL transmissions, a scheduling entity (e.g., a base station) can assign one or more REs 306 (e.g., within the control region 312) to one or more scheduled entities (e.g., UEs) to carry DL control information including one or more DL control channels, such as a physical downlink control channel (PDCCH). The PDCCH carries downlink control information (DCI) including but not limited to power control commands (e.g., one or more open loop power control parameters and / or one or more closed loop power control parameters), scheduling information, grants, and / or an assignment of REs for DL and UL transmissions. The PDCCH can also carry HARQ feedback transmissions, such as an acknowledgement (ACK) or negative acknowledgement (NACK). HARQ is a technique well-known in the art in which the integrity of packet transmissions can be checked at the receiving side for accuracy, e.g., utilizing any suitable integrity checking mechanism, such as a checksum or a cyclic redundancy check (CRC). If the integrity of the transmission is confirmed, an ACK can be sent, whereas if not confirmed, a NACK can be sent. In response to the NACK, the transmitting device can send a HARQ retransmission, which can implement chase combining, incremental redundancy, etc.

[0080] The base station can also allocate one or more REs 306 (e.g., in the control region 312 or the data region 314) to carry other DL signals such as a demodulation reference signal (DMRS); a phase-tracking reference signal (PT-RS); a channel state information (CSI) reference signal (CSI-RS); and synchronization signals block (SSB). The SSBs can be broadcasted at regular intervals based on a periodicity (e.g., 5, 10, 20, 40, 80, or 160 ms). An SSB includes a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcast channel (PBCH). A UE can utilize the PSS and SSS to achieve synchronization in the time domain (e.g., radio frames, subframes, slots, and symbols), identify the center of the channel (system) bandwidth in the frequency domain, and identify the physical cell identity (PCI) of the cell.

[0081] The PBCH in the SSB can also include a master information block (MIB) containing various system information and parameters for decoding system information blocks (SIBs). For example, the SIBs can be a system information type 1 (SIB1) that can include various additional system information, for example. The MIB and SIB1 together provide the minimum system information (SI) for initial access. Examples of system information transmitted in the MIB can include, but are not limited to, a subcarrier spacing (e.g., default downlink numerology), a system frame number, a configuration of a PDCCH control resource set (CORESET) (e.g., PDCCH CORESET 0), a cell barred indicator, a cell reselection indicator, a raster offset, and a search space for SIB1. Examples of remaining minimum system information (RMSI) transmitted in the SIB1 can include, but are not limited to, a random access search space, a paging search space, downlink configuration information, and uplink configuration information. The base station can also transmit other system information (OSI).

[0082] In UL transmissions, a scheduled entity (e.g., UE) can utilize one or more REs 306 to carry UL control information (UCI) including one or more UL control channels, such as a physical uplink control channel (PUCCH), to a scheduling entity. UCI can include a variety of groupings of information and categories, including pilots, reference signals, and information configured to enable or assist in decoding uplink data transmissions. Examples of uplink reference signals can include a sounding reference signal (SRS) and an uplink DMRS. In some examples, the UCI can include a scheduling request (SR), i.e., a request for the scheduling entity to schedule uplink transmissions. Here, in response to the SR transmitted on the UCI, the scheduling entity can transmit downlink control information (DCI) that can schedule resources for uplink packet transmissions. The UCI can also include HARQ feedback, channel state feedback (CSF) such as a CSI report, or any other suitable UCI.

[0083] In addition to control information, one or more REs 306 (e.g., within data region 314) can be allocated for data traffic. Such data traffic can be carried in one or more traffic channels, such as, for DL transmissions, a physical downlink shared channel (PDSCH); or for UL transmissions, a physical uplink shared channel (PUSCH). In some examples, one or more REs 306 within data region 314 can be configured to carry other signals, such as one or more SIBs and DMRSs.

[0084] In an example of sidelink communications over a sidelink carrier via a Proximity Service (ProSe) PC5 interface, control region 312 of slot 310 can include a physical sidelink control channel (PSCCH) including sidelink control information (SCI) transmitted by an initiating (transmitting) sidelink device (e.g., a Tx V2X device or other Tx UE) toward a set of one or more other receiving sidelink devices (e.g., Rx V2X devices or other Rx UEs). Data region 314 of slot 310 can include a physical sidelink shared channel (PSSCH) including sidelink data traffic transmitted by the initiating (transmitting) sidelink device within resources reserved by the transmitting sidelink device over the sidelink carrier via the SCI. Other information can also be transmitted over various REs 306 within slot 310. For example, HARQ feedback information can be transmitted from the receiving sidelink devices to the transmitting sidelink device in a physical sidelink feedback channel (PSFCH) within slot 310. Additionally, one or more reference signals can be transmitted within slot 310, such as a sidelink SSB, a sidelink CSI-RS, a sidelink SRS, and / or a sidelink positioning reference signal (PRS).

[0085] The physical channels described above are typically multiplexed and mapped onto transport channels for processing at the medium access control (MAC) layer. The transport channels carry information between the network entity and the UE over the air interface. The transport channels can be classified into two groups based on how and where they are mapped to the physical channels. The first group of transport channels is shared by different UEs and / or used for different purposes. The second group of transport channels is dedicated to one UE and used for one purpose.

[0086] The channels or carriers described above in connection with Figures 1-3 The channels or carriers described above are not necessarily all the channels or carriers that can be utilized between a scheduling entity and a scheduled entity, and those skilled in the art will recognize that other channels or carriers, such as other traffic, control, and feedback channels, can be utilized in addition to the channels or carriers shown.

[0087] In some aspects of the disclosure, the scheduling entity and / or the scheduled entity can be configured for beamforming and / or multiple-input multiple-output (MIMO) techniques. Figure 4 An example of a wireless communication system 400 that supports beamforming and / or MIMO is shown. In a MIMO system, a transmitter 402 includes multiple transmit antennas 404 (e.g., N transmit antennas) and a receiver 406 includes multiple receive antennas 408 (e.g., M receive antennas). Thus, there are N x M signal paths 410 from the transmit antennas 404 to the receive antennas 408. Each of the transmitter 402 and receiver 406 can be implemented, for example, in a scheduling entity, a scheduled entity, or other appropriate wireless communication devices.

[0088] The use of such multi-antenna technology enables the wireless communication system to exploit the spatial domain to support spatial multiplexing, beamforming, and transmit diversity. Spatial multiplexing can be used to transmit different streams of data, also referred to as layers, from the same time-frequency resource, to increase the data rate. The spatial layers can be transmitted in the same frequency band or in different frequency bands. The different streams of data can be transmitted to a single UE to increase the rate received by the UE or to multiple UEs to increase the overall system capacity. This is achieved by spatially precoding each data stream (i.e., multiplying the data streams with different weighting and phase shifting) and then transmitting each spatially precoded stream through multiple transmit antennas on the downlink. The spatially precoded data streams arrive at the UE(s) with different spatial signatures, which enables each of the UE(s) to recover the one or more data streams destined for that UE. On the uplink, each UE transmits a spatially precoded stream, which enables the base station to identify the source of each spatially precoded stream.

[0089] The number of data streams or layers corresponds to the rank of the transmission. In general, the rank of the MIMO system 400 is limited by the number of transmit antennas 404 or receive antennas 408, whichever is lower. Additionally, channel conditions at the UE and other considerations, such as available resources at the base station, can also impact the transmission rank. For example, the rank assigned to a particular UE on the downlink (and thus, the number of data streams) can be determined based on a rank indicator (RI) transmitted from the UE to the base station. The RI can be determined based on the antenna configuration (e.g., the number of transmit antennas and receive antennas) and the measured signal-to-interference-and-noise ratio (SINR) on each of the receive antennas. The RI can indicate, for example, the number of layers that can be supported under the current channel conditions. The base station can use the RI, along with resource information (e.g., available resources and the amount of data to be scheduled for the UE), to assign a transmission rank to the UE.

[0090] In one example, as Figure 4As shown, a rank-2 spatial multiplexing transmission on a 2x2 MIMO antenna configuration will transmit one data stream from each transmit antenna 404. Each data stream follows a different signal path 410 to each receive antenna 408. The receiver 406 can then use the signals received from each receive antenna 408 to reconstruct the data streams.

[0091] Beamforming is a signal processing technique that can be used at the transmitter 402 or receiver 406 to shape or direct antenna beams (e.g., transmit or receive beams) along a spatial path between the transmitter 402 and receiver 406. Beamforming can be achieved by combining signals transmitted via the antennas 404 or 408 (e.g., antenna elements of an antenna array module) such that some of the signals experience constructive interference while others experience destructive interference. To produce the desired constructive / destructive interference, the transmitter 402 or receiver 406 can apply amplitude and / or phase offsets to the signals transmitted or received from each of the antennas 404 or 408 associated with the transmitter 402 or receiver 406.

[0092] A base station (e.g., gNB) can generally be capable of communicating with UEs using beams of different beamwidths. For example, a base station can be configured to utilize wider beams when communicating with UEs that are in motion, and narrower beams when communicating with UEs that are fixed. In some examples, to select a particular beam for communication with a UE, the base station can transmit reference signals, such as SSBs or CSI-RSs, on each of a plurality of beams in a beam sweep. In some examples, SSBs can be transmitted on wider beams, while CSI-RSs can be transmitted on narrower beams. The UE can measure the reference signal received power (RSRP) or signal to interference plus noise ratio (SINR) on each of the beams, and transmit a beam measurement report (e.g., a layer 1 (LI) measurement report) to the base station indicating the RSRP or SINR of one or more of the measured beams. The base station can then select a particular beam for communication with the UE based on the LI measurement report. In other examples, when the channel is reciprocal, the base station can derive a particular beam to communicate with the UE based on uplink measurements of one or more uplink reference signals, such as sounding reference signals (SRSs).

[0093] In 5G New Radio (NR) systems, beamformed signals can be used for most downlink channels, including the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH), especially for above 6 GHz or millimeter wave systems. In addition, broadcast control information, such as SSB, slot format indicator (SFI), and paging information, can be transmitted in a beam sweeping manner to enable all scheduled entities (UEs) in the coverage area of a transmission reception point (TRP) (e.g., gNB) to receive the broadcast control information. Furthermore, for UEs configured with beamformed antenna arrays, beamformed signals can also be used for uplink channels, including the physical uplink control channel (PUCCH) and the physical uplink shared channel (PUSCH). However, it should be understood that beamformed signals can also be used by enhanced mobile broadband (eMBB) gNBs for sub-6 GHz systems.

[0094] Figure 5 is a diagram illustrating communications between a radio access network (RAN) node 504 and a wireless communication device 502 using downlink beamformed signals, according to some aspects. The RAN node 504 can be any of the base stations or scheduling entities illustrated in Figure 1 and 2 and the wireless communication device 502 can be any of the UEs or scheduled entities illustrated in Figure 1 and 2 It should be noted that while some beams are illustrated adjacent to each other, such an arrangement can be different in different aspects. In some examples, beams transmitted during the same symbol can not be adjacent to each other. In some examples, the RAN node 504 can transmit more or fewer beams distributed over all directions (e.g., 360 degrees).

[0095] In Figure 5In the example illustrated in FIG. 5, the set of beams includes eight different beams 521, 522, 523, 524, 525, 526, 527, 528, each associated with a different beam direction. In some examples, the RAN node 504 can sweep or transmit each of the beams 521, 522, 523, 524, 525, 526, 527, 528 during a synchronization time slot. For example, the RAN node 504 can transmit a reference signal, such as an SSB or a CSI-RS, on each beam in different beam directions during the synchronization time slot. Transmission of the beam reference signals can occur periodically (e.g., as configured by the gNB via radio resource control (RRC) signaling), semi-persistently (e.g., as configured by the gNB via RRC signaling and activated / deactivated via medium access control-control element (MAC-CE) signaling), or aperiodically (e.g., as triggered by the gNB via downlink control information (DCI)).

[0096] The wireless communication device 502 searches for and identifies the beams based on the beam reference signals. The wireless communication device 502 then performs beam measurements (e.g., RSRP, SINR, RSRQ, etc.) on the beam reference signals to determine a respective beam quality for each of the beams. In examples where the wireless communication device 502 is in an RRC connected state, the wireless communication device 502 can generate and transmit an LI measurement report to the RAN node 504 that includes a respective beam identifier (beam index) and beam measurement for one or more of the beams 521-528. The RAN node 504 can then determine a downlink beam (e.g., beam 524) on which to transmit unicast downlink control information and / or user data traffic to the wireless communication device 502. In some examples, the selected downlink beam has the highest gain from the LI measurement report. Transmission of the LI measurement report can occur periodically (e.g., as configured by the gNB via RRC signaling), semi-persistently (e.g., as configured by the gNB via RRC signaling and activated / deactivated via MAC-CE signaling), or aperiodically (e.g., as triggered by the gNB via DCI).

[0097] In other examples, when the channels are reciprocal (e.g., downlink channel quality and uplink channel quality are the same), the RAN node 504 can derive the downlink beam. Derivation of the downlink beam can be based on uplink measurements performed by the RAN node 504, such as by measuring a received power, quality, or other variable of a sounding reference signal (SRS) or other uplink reference signal transmitted by the wireless communication device 502. In some examples, the RAN node 504 can derive the downlink beam based on a combination of the LI measurement report and the uplink measurements.

[0098] In examples where the wireless communication device 502 is in an RRC idle state, the wireless communication device 502 can use beam measurements to select a downlink beam from which to receive broadcast communications from the RAN node 504. The broadcast communications can include, for example, paging messages transmitted from the RAN node 504 to the wireless communication device 502 when new data arrives at the network for the wireless communication device 502. In some examples, the RAN node 504 can broadcast the paging messages on multiple downlink beams. The wireless communication device 502 can then receive the paging messages on the selected downlink beam.

[0099] In addition to the LI measurement report, the wireless communication device 502 can also utilize beam reference signals to estimate the channel quality of the channel between the RAN node 504 and the wireless communication device 502. For example, the wireless communication device can measure the SINR of each received CSI-RS and generate a CSI report based on the measured SINRs. The CSI report can include, for example, a channel quality indicator (CQI), a rank indicator (RI), a precoding matrix indicator (PMI), and / or a layer indicator (LI). The CSI report can be used by the scheduling entity to select a rank for the scheduled entity, as well as a precoding matrix and MCS to be used for future downlink transmissions to the scheduled entity. The MCS can be selected from one or more MCS tables, each associated with a particular type of coding (e.g., polar coding, LDPC, etc.) or modulation (e.g., binary phase-shift keying (BPSK), quadrature phase-shift keying (QPSK), 16 quadrature amplitude modulation (QAM), 64 QAM, 256 QAM, etc.). The LI can be used to indicate which column of the precoding matrix of the reported PMI corresponds to the strongest layer codeword corresponding to the reported maximum wideband CQI.

[0100] The RAN node 504 and the wireless communication device 502 can support different types of CSI reports (including the LI measurement report) and / or different types of measurements. For example, self-contained CSI (e.g., the CSI is transmitted back to the RAN node 504 in the same slot as the CSI-RS is transmitted from the RAN node) or non-self-contained CSI (e.g., the CSI is transmitted back to the RAN node 504 in a later slot compared to the slot in which the CSI-RS is transmitted from the RAN node) can be supported. To distinguish between the different reporting / measurement types and measurement configurations, the CSI-RS pilots can be mapped to specific resource elements (REs) and ports for each of the reporting / measurement types and reporting / measurement configurations.

[0101] In certain aspects, a UE can also use beamformed SSBs for RRM / RLM measurements. However, SSBs can not be transmitted in every BWP. For example, to achieve power saving, a UE such as a RedCap UE operating in a discontinuous reception (DRX) mode can switch to a narrow-band (NB) BWP that does not include SSBs. As another example, to compensate for coverage loss due to a reduced number of antennas, bandwidth limitations, or receiver chain design limitations, a RedCap UE can hop to a NB BWP that does not include SSBs. Thus, for some UEs such as RedCap UEs or UEs with strict power saving requirements, the current 3GPP NR specification for RRM / RLM measurements and PDCCH-based wake-up signal (WUS) can not be optimal. Generally, PDCCH-based WUS for UEs operating in a DRX mode can not be useful for time / frequency tracking and RRM / RLM measurements. Thus, a UE operating in a NB BWP that does not include SSBs can need to switch to a BWP that includes SSBs to perform RRM / RLM measurements. A base station (gNB) can configure a measurement gap for a UE in idle mode, inactive mode, or connected mode to switch from a NB BWP that lacks SSBs to another BWP that carries SSBs to perform SSB-based RRM / RLM measurements. However, for RedCap UEs and other UEs with strict power saving requirements, configuring such UEs with a measurement gap and having the UE perform BWP switching to obtain RRM / RLM measurements increases UE complexity and reduces power efficiency of the UE. Further, for SSB-based RRM / RLM measurements, the UE can need to decode PBCH to derive beam indices, which further increases UE complexity. Moreover, RedCap UEs can benefit from signal repetition to improve diversity gain. However, SSB repetition is not supported in SSB bursts for cell-edge UEs.

[0102] Accordingly, in various aspects, a new type of reference signal, referred to herein as a resynchronization signal (RSS), can be generated and transmitted in each BWP, including the NB BWP. The RSS can adapt to UE capability and UE resource allocation for each BWP. For example, the RSS can have a length that adapts according to the BWP configuration. Accordingly, a respective RSS can be configured for each BWP, including a BWP that can also carry an SSB. The UE can utilize the RSS to achieve wireless frame, subframe, slot, and symbol synchronization in the time domain, identify a center of a channel (system) bandwidth in the frequency domain, identify a physical cell identity (PCI) of a cell, perform RRM / RLM measurements, and / or perform channel state information (CSI) reporting. Accordingly, the UE no longer needs to be configured with a measurement gap to switch to a BWP that includes an SSB to perform RRM / RLM measurements, thereby providing power savings and reducing UE complexity. In some examples, the RSS can include information indicated in a primary synchronization signal (PSS) and information indicated in a secondary synchronization signal (SSS). Since the RSS is sequence-based, the UE does not need to perform PBCH decoding, thereby simplifying UE complexity. Moreover, the UE can reuse a receiver chain (e.g., hardware and firmware) of the UE for PSS / SSS detection in order to detect the RSS. In some examples, the RSS can be combined with a WUS or a paging signal, thereby further simplifying UE complexity.

[0103] Figure 6 is a signaling diagram illustrating example signaling for generating and utilizing a resynchronization signal (RSS) in a wireless communication network 600 according to some aspects. The wireless communication network can include a user equipment (UE) 602 and a base station 604. The UE 602 can correspond to any of the UEs or scheduled entities illustrated in FIGs. 1-5 as described herein. Further, the base station 604 can correspond to any of the base stations (e.g., eNBs or gNBs), scheduling entities, or more generally radio access network (RAN) nodes illustrated in FIGs. 1-5 as described herein. In some examples, the UE can be a reduced capability (RedCap) UE as described herein. Figure 1 、 2 、4 or 5 as described herein. Further, the base station 604 can correspond to any of the base stations (e.g., eNBs or gNBs), scheduling entities, or more generally radio access network (RAN) nodes illustrated in FIGs. 1-5 as described herein. In some examples, the UE can be a reduced capability (RedCap) UE as described herein. Figure 1 、 2 、4 or 5 as described herein. Further, the base station 604 can correspond to any of the base stations (e.g., eNBs or gNBs), scheduling entities, or more generally radio access network (RAN) nodes illustrated in FIGs. 1-5 as described herein. In some examples, the UE can be a reduced capability (RedCap) UE as described herein.

[0104] In operation 606, the base station 604 can generate an RSS for an active bandwidth part (BWP) of a plurality of BWPs. In some aspects, the active BWP does not include an SSB. A bandwidth of the RSS can be based on a bandwidth of the active BWP. In certain aspects, the bandwidth of the RSS can be scalable to the bandwidth of the active BWP. For example, a first active BWP can have a bandwidth that is greater than a bandwidth of a second active BWP. The RSS generated for transmission in the first active BWP can be greater than the RSS generated for transmission in the second active BWP. Conversely, the RSS generated for transmission in the second active BWP can be less than the RSS generated for transmission in the first active BWP. In certain aspects, the bandwidth of the RSS can be scalable in proportion to the bandwidth of the active BWP. For example, a first active BWP can have a bandwidth that is twice a bandwidth of a second active BWP. The RSS generated for transmission in the first active BWP can be twice as large as the RSS generated for transmission in the second active BWP. Conversely, the RSS generated for transmission in the second active BWP can be twice as small as the RSS generated for transmission in the first active BWP. FIG. 7, described further herein, illustrates an example circuit 700 of a base station for generating an RSS.

[0105] In operation 608, the base station 604 can transmit the RSS in the active BWP of the plurality of BWPs. For example, the base station 604 can transmit the RSS in the active BWP of the plurality of BWPs and the UE 602 can receive the RSS in the active BWP of the plurality of BWPs. In certain aspects, the RSS can be transmitted in a single symbol or multiple symbols of a slot. In some aspects, the RSS can be received in a preconfigured frequency raster associated with the active BWP. In certain aspects, the RSS can be transmitted in a contiguous set of resource blocks (RBs) in the active BWP. In some aspects, the RSS can be transmitted on a set of symbols within a set of slots configured by the RAN node. In some aspects, a duration of the RSS is based on an active time of the active downlink BWP. FIG. 8, described further herein, illustrates an example diagram of a UE receiving an RSS. Figure 10 An example diagram of an RSS is illustrated.

[0106] In certain aspects, prior to the base station 604 transmitting the RSS in the active BWP of the plurality of BWPs, the base station 604 can transmit at least one of a system information block (SIB) message or a radio resource control (RRC) message that identifies a power offset of the RSS relative to a synchronization signal block (SSB) reference signal. The base station 604 can subsequently transmit the RSS in the active BWP of the plurality of BWPs and with a power that is increased relative to a power of the SSB reference signal based on the power offset.

[0107] As described herein, the base station 604 can transmit an RSS on one or more RSS beams, such as a first RSS beam and a second RSS beam. The base station 604 can transmit each of the one or more RSS beams by quasi co-locating (QCL) each of the one or more RSS beams with a SSB beam or a CSI-RS beam. In some aspects, the RSS beams can be periodically or semi-statically transmitted, and the periodicity can be preconfigured by the base station 604 or other network entity and indicated in system information (SI) or dedicated RRC signaling. The base station 604 can transmit repetitions of a same RSS sequence on a same RSS beam of the one or more RSS beams in RSS slots of a plurality of RSS slots. Each of the repetitions can be time-division multiplexed in the RSS slots. In some aspects, the repetitions of the RSS sequence can be transmitted in consecutive symbols of the RSS slots. The base station 604 can also transmit the RSS in at least one RSS slot of the plurality of slots. The at least one RSS slot can be preconfigured for an active BWP.

[0108] In some aspects, the base station 604 can transmit at least one of a system information block (SIB) message or a radio resource control (RRC) message that identifies at least one RSS slot for an active BWP. For example, the base station 604 can transmit the RSS in at least one RSS slot of a plurality of slots. Prior to transmitting the RSS, the base station 604 can transmit at least one of the SIB message or the RRC message that identifies the at least one RSS slot for the active BWP.

[0109] In operation 610, the UE 602 can perform measurements of the RSS. In some aspects, the UE 602 can receive the RSS in an active BWP of the plurality of BWPs, and perform the measurements of the RSS after receiving the RSS. For example, the UE 602 can perform one or more RRM or RLM measurements using the RSS. The UE 602 can also perform Ll-RSRP or Ll-SINR beam measurements and / or CSI measurements. In some aspects, after performing the measurements of the RSS, the UE 602 can also utilize the measurements of the RSS for radio resource management or radio link monitoring in different radio resource control (RRC) states of the UE 602, and combine the measurements of the RSS with paging signal or wake-up signal detection of the UE. In some aspects, after performing the measurements of the RSS, the UE 602 can utilize the measurements of the RSS for radio resource management (RRM) or radio link monitoring (RLM) in different radio resource control (RRC) states of the UE 602 based on a measurement object (e.g., configuration information) and a measurement reporting configuration. The UE 602 can also combine the measurements of the RSS with paging signal or wake-up signal detection of the UE 602. For example, the UE 602 can select a tracking loop for receiving and measuring the RSS based on a received measurement object. As another aspect, the UE 602 can measure the RSS using one or more resource elements and / or one or more slots based on a received measurement object. As yet another aspect, the UE can measure the RSS and provide the measurements of the RSS to a scheduling entity according to a measurement report.

[0110] It should be appreciated that a measurement object can include a list of one or more objects for which the UE is to perform measurements. For intra-frequency measurements and inter-frequency measurements, a measurement object can indicate a frequency and / or time location of a reference signal to be measured and a subcarrier spacing. Associated with the measurement object, the network can configure a list of cell-specific offsets, a “blacklist” of cells, and a “whitelist” of cells. Blacklisted cells can not be applicable for event evaluation or measurement reporting. Whitelisted cells can be the only cells applicable for event evaluation or measurement reporting. The measObjectId corresponding to each serving cell’s MO can be indicated by servingCellMO within the serving cell configuration. For inter-RAT E-UTRA measurements, a measurement object can be a single E-UTRA carrier frequency. Associated with the E-UTRA carrier frequency, the network can configure a list of cell-specific offsets, a “blacklist” of cells, and a “whitelist” of cells. Blacklisted cells can not be applicable for event evaluation or measurement reporting. Whitelisted cells can be the only cells applicable for event evaluation or measurement reporting. For inter-RAT UTRA-FDD measurements, a measurement object can be a set of cells on a signaled UTRA-FDD carrier frequency. For CBR measurements for NR sidelink communications, a measurement object can be a set of transmission resource pools for NR sidelink communications on a single carrier frequency. For CLI measurements, a measurement object can indicate a frequency and / or time location of SRS resources and / or CLI-RSSI resources, and a subcarrier spacing of the SRS resources to be measured.

[0111] It should be appreciated that a reporting configuration (e.g., measurement reporting) can include reporting criteria, RS types, reporting formats, etc. Reporting criteria can include criteria that trigger the UE to send a measurement report, such as periodically or a single event description. RS types can include RSs (e.g., SS / PBCH blocks or CSI-RSs) that the UE can use for beam and cell measurement results. Reporting formats can include quantities (e.g., RSRP) and other associated information (such as a maximum number of cells to report and a maximum number of beams per cell) that the UE can include in a measurement report per cell and / or per beam. In the case of conditional reconfiguration, each configuration can include execution criteria, RS types, etc. Execution criteria can include criteria that the UE uses for conditional reconfiguration execution. RS types can include RSs (based on SS / PBCH blocks or based on CSI-RSs) that the UE uses to obtain beam and cell measurement results, to evaluate conditional reconfiguration execution conditions.

[0112] It should be understood that the measurement identities can include a list of measurement identities for measurement reporting, where each measurement identity links one measurement object with one reporting configuration. By configuring multiple measurement identities, it is possible to link more than one measurement object to the same reporting configuration, and more than one reporting configuration to the same measurement object. The measurement identities can also be included in the measurement report that triggers the reporting, thereby serving as a reference to the network. For the conditional reconfiguration trigger, one measurement identity can be linked to exactly one conditional reconfiguration trigger configuration. In some aspects, up to 2 measurement identities can be linked to one conditional reconfiguration execution condition.

[0113] In operation 612, the UE 602 can utilize a communication link with the base station 604 based on the measurements. Similarly, the base station 604 can utilize a communication link with the UE 602 based on the RSS. In some examples, utilizing the communication link with the base station 604 based on the measurements can include at least one of the UE 602 receiving a measurement object (e.g., configuration information) for the RSS and a measurement reporting configuration, the UE 602 transmitting a measurement report (such as a CSI report) generated based on the RSS measurements to the base station 604, the UE 602 adjusting a tracking loop based on the measurements, or updating one or more reception or transmission parameters based on the measurements. The CSI report can include an Ll beam measurement report or CSI parameters (e.g., CQI, PMI, RI, etc.) based on a UE’s CSI reporting configuration. The base station 604 can use the CSI report to adapt transmissions to current channel conditions. For example, the base station 604 can select one or more beams, rank, MCS, precoding matrix, etc. based on the CSI report.

[0114] In some examples, utilizing the communication link with the base station 604 based on the measurements can include the UE 602 adjusting a tracking loop of the UE 602 based on the measurements. Examples of the tracking loop can include a time tracking loop (TTL), a frequency tracking loop (FTL), a power delay profile estimation loop, and / or an automatic gain control (AGC) loop. In some examples, utilizing the communication link with the base station 604 based on the measurements can include the UE 602 updating one or more reception or transmission parameters of the UE in an active and power saving mode based on the RSS measurements. The reception and / or transmission parameters can include, for example, a transmit power, a modulation type, etc. Updating the one or more reception or transmission parameters can include adjusting or changing the one or more reception and / or transmission parameters. Additionally or alternatively, updating the one or more reception and / or transmission parameters can include verifying or determining that the one or more reception and / or transmission parameters are up to date.

[0115] In certain aspects, after the UE 602 receives the RSS in the active BWP, the UE 602 can identify another active BWP of the plurality of BWPs. The UE 602 can switch from the active BWP to the other active BWP. Subsequently, the UE 602 can receive another RSS for the other active BWP. Upon receiving the other RSS, the UE 602 and the base station 604 can perform operations 608, 610, and 612 described herein based on the other RSS.

[0116] Figure 7A FIG. 7 is a diagram illustrating exemplary circuitry 700 within a base station for generating an RSS, in accordance with some aspects. The circuitry 700 includes segmentation and interleaving circuitry 702, a pseudo-random number (PN) sequence generator 704, scrambling circuitry 706, a quadrature phase shift keying (QPSK) modulator 708, code covering circuitry 710, inverse fast Fourier transform (IFFT) circuitry 712, mapping circuitry 714, radio frequency (RF) circuitry 716, and beamforming circuitry 718. In certain aspects, the RSS can include an RSS sequence generated from a base sequence. The base sequence can include a combination of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS). For example, the segmentation and interleaving circuitry 702 can be configured to perform segmentation of a PSS sequence and a SSS sequence to produce a segmented PSS sequence (d PSS (n)) and a segmented SSS sequence (d SSS (n)). The segmentation and interleaving circuitry 702 can also perform interleaving or otherwise combining of the segmented PSS sequence (d PSS (n)) and the segmented SSS sequence (d SSS (n)) to form the base sequence (D RSS (n)). For example, the segmentation and interleaving circuitry 702 can generate a truncated version of the PSS sequence and / or the SSS sequence based on a bandwidth of a BWP associated with the base sequence. In NR 3GPP specifications, the sequence length of the PSS and the SSS is 127. However, based on the BWP configuration, the length (n) of the PSS sequence and the SSS sequence utilized in generating the RSS can be less than or equal to 127. In some examples, the segmentation and interleaving circuitry 702 can generate the base sequence from only one of the PSS or the SSS. In this example, the PSS or the SSS can be segmented, and each segment can be further truncated.

[0117] The segmentation and interleaving circuitry 702 can then combine the truncated version of the PSS sequence and / or the SSS sequence to produce the base sequence. For example, the base sequence (D RSS (n)) can be derived using segmentation and interleaving as follows:

[0118] D RSS (2n) = dPSS (mod(n, 127)) and D RSS (2n + 1) = d SSS (mod(n, 127)) (Equation 1)

[0119] where n is a slot, 0 <= n < N RSS where N RSS is the length of the RSS sequence.

[0120] As another example, the base sequence (D RSS (n)) can be derived using segmentation and interleaving as follows:

[0121] D RSS (2n) = d SSS (mod(n, 127)) and D RSS (2n + 1) = d PSS (mod(n, 127)) (Equation 2)

[0122] where n is a slot, 0 <= n < N RSS where N RSS is the length of the RSS sequence. The PSS sequence (d PSS (n)) and the SSS sequence (d SSS (n)) can be generated based on, for example, 3GPP NR Release 15 specifications (clauses 7.4.2.2 and 7.4.2.3, TS 38.211).

[0123] In some examples, the segmentation and interleaving circuit 702 can combine the sequence portions by multiplexing the PSS sequence and the SSS sequence to form the base sequence (D RSS (n)). For example, the base sequence (D RSS (n)) can be derived using multiplexing as follows:

[0124] D RSS (n) = d PSS (mod(n, 127)) and D RSS (n + N RSS ) = d SSS (mod(n, 127)) (Equation 3)

[0125] where n is a slot, 0 <= n < N RSS where N RSS is the length of the RSS sequence.

[0126] As another example, the base sequence (D RSS (n)) can be derived using multiplexing as follows:

[0127] D RSS(2n)=d SSS (mod(n,127)) and D RSS (n+N RSS )=d PSS (mod(n,127))(Equation 4)

[0128] Where n is the time slot, 0 <= n <N RSS , where N RSS This is the length of the RSS sequence. The PSS sequence (d) PSS (n)) and SSS sequence (d SSS (n) can be generated based on, for example, the 3GPP NR version 15 specification (clauses 7.4.2.2 and 7.4.2.3, TS 38.211).

[0129] In some aspects, interleaved or multiplexed PSS sequences (d PSS (n)) and SSS sequence (d SSS (n)) performs cyclic shifts to generate the basic sequence. For example, the segmentation and interleaving circuit 702 can also be configured to generate cyclic shifts derived as follows:

[0130] Q CS =αk (Equation 5)

[0131] Where α is a constant, k represents the index of the RSS beam, and 0 <= k <k max .

[0132] PN sequence generator 704 can be configured to generate scrambling sequences (C) for RSS beam k. k (n)), the scrambling sequence is used by scrambling circuit 706 to scramble the basic sequence. For example, PN sequence generator 704 can be based on RSS beam index k and cell identifier (ID)(N) cell ID To generate a scrambling sequence (C) for the RSS beam k. k (n)). The cell identifier can identify the cell associated with base station 604. Scrambling sequence (C k (n) can be a beam-correlated scrambling sequence and can have a bandwidth twice that of the RSS. For example, the PN sequence generator 704 can use both the cell identifier and the RSS beam index k to form a scrambling sequence (C). k (n)), where 0 <= k <k max And it can be derived as follows:

[0133] C init = [(2 11 (mod(k,8) +1)(((N)) cellID ) / 4) +1)] + [(2 6 )(mod(k,8)+1)] +[mod((N cell ID ),4))] Equation (6)

[0134] where, for a particular RSS beam (k), a scrambling sequence (C k (n)) is generated having a length that is twice the bandwidth of the RSS.

[0135] As another example, the PN sequence generator can use a cell identifier to form a scrambling sequence (C k (n)) such that C init = N cell ID and generate an extended scrambling sequence having a length that is twice the product of the maximum number of beams (kmax) and the length of the RSS sequence (N RSS ). The extended scrambling sequence can be uniformly divided into a number of segments (k max segments) such that each segment has elements that are twice the length of the RSS bandwidth N RSS . Further described herein Figure 8 shows an exemplary plot of an extended scrambling sequence.

[0136] In other examples, the PN sequence generator 704 can be initialized with a panel identifier (ID) associated with multiple TRPs. For example, a UE can be in the coverage area of more than one cell. In this example, a respective base station (e.g., gNB) or a remote radio head (RRH) of the base station that serves one of the cells can act as a transmission reception point (TRP) in a coordinated multipoint (CoMP) network configuration, where downlink and / or uplink signals can be transmitted between the UE and each of the multiple TRPs. Each TRP in a multi-TRP configuration can include multiple antenna arrays, each antenna array including one or more antenna panels for communication with the UE. The PN sequence generator 704 can be configured to generate a scrambling sequence using a panel ID of a panel used for transmission of the RSS.

[0137] The scrambling circuit 706 can scramble the base sequence D k (n) with the beam-dependent scrambling sequence C RSS (n) to generate a scrambled sequence S k (n). The scrambled sequence S k (n) can be derived as follows:

[0138] S k (n) = mod((D RSS (n) + Ck (n)),2)(Equation 7)

[0139] where n is a slot, 0 <= n < 2N RSS - 1, where N RSS is the length of the RSS sequence.

[0140] A quadrature phase shift keying (QPSK) modulator 708 can modulate the scrambled sequence S k (n) using quadrature phase shift keying (QPSK) to form a QPSK sequence that corresponds to the RSS sequence and has a bandwidth equal to the bandwidth of the RSS. For example, the in-phase (I) component and the quadrature (Q) component of the RSS sequence for the kth beam correspond to the elements of S k (n) having even and odd indices, and can be derived as follows:

[0141] RSS k (n) = (1 / (2 1 / 2 ))(1 - 2(S k (2n)) ) + j(1 / (2 1 / 2 ))(1 - 2(S k (2n+1)) ) (Equation 8)

[0142] where n is a slot, 0 <= n < N RSS , where N RSS is the length of the RSS sequence. In some examples, the in-phase component can include the even-indexed elements of the sequence, and the quadrature-phase component can include the odd-indexed elements of the sequence.

[0143] In certain aspects, a repetition of the RSS can be generated on a same RSS beam of the one or more RSS beams in an RSS slot of the plurality of RSS slots. Each of the repetitions can be time-division multiplexed in the RSS slot. For example, the base station circuitry 700 can generate a repetition of the RSS for transmission in consecutive symbols of the RSS slot. In some examples, the code cover circuitry 710 can be configured to apply a binary cover code to each of the repetitions of the RSS and generate the RSS or a conjugate of the RSS for each of the repetitions of the RSS based on the binary code cover.

[0144] For example, the RSS beams can be time-division multiplexed and generated for transmission in a preconfigured RSS slot. The same RSS beam (e.g., the RSS k ) can be repeated M times within the RSS slot. When the same RSS beam is repeated at least twice (M > 1), a binary cover code C MApplied to RSS repetitions for interference averaging. In some examples, a binary cover code C M may be a PN sequence and is a function of cell ID and BWP ID. Based on the pattern of the binary cover code C M , an RSS sequence or its conjugate can be generated for each of the RSS repetitions, which can then be transmitted across the M OFDM symbols of the RSS slot. Further described herein Figure 9 provides an example illustration of OFDM symbol indices of an RSS slot.

[0145] IFFT circuit 712 can then be configured to apply an IFFT to the RSS or its conjugate to convert the RSS (or its conjugate) from the frequency domain to the time domain. Mapping circuit 714 can be configured to map the RSS to one or more resource elements (REs) within the RSS slot. RF circuit 716 can then be configured to up-convert the RSS to radio frequency (RF). Beamforming circuit 718 can then be configured to generate one or more RSS beams for transmitting the RSS. For example, beamforming circuit 718 can include phase shifters for digital and / or analog beamforming via one or more antenna arrays.

[0146] In certain aspects, the base station circuitry 700 can generate one or more RSS beams each for transmitting a respective RSS sequence. For example, the base station circuitry 700 can generate a first RSS sequence for transmission on a first RSS beam and a second RSS sequence for transmission on a second RSS beam. In some aspects, generating each of the first RSS sequence and the second RSS sequence can include generating a first base RSS sequence for the first RSS sequence and a second base RSS sequence for the second RSS sequence. The first base RSS sequence and the second base RSS sequence for the first RSS sequence and the second RSS sequence can both include a combination of a PSS and a SSS, which can be generated by the segment and interleave circuitry 702. For example, the segment and interleave circuitry 702 can generate the first base RSS sequence for the first RSS sequence by interleaving or multiplexing the PSS with the SSS to produce the combination of the PSS and the SSS. As another example, the segment and interleave circuitry 702 can generate the second base RSS sequence for the second RSS sequence by interleaving or multiplexing the PSS with the SSS to produce the combination of the PSS and the SSS. Here, the first base RSS sequence and the second base RSS sequence can be the same. As another example, the segment and interleave circuitry 702 can generate the first base RSS sequence for the first RSS sequence by applying a first cyclic shift associated with the first RSS beam to the combination of the PSS and the SSS to produce the first base RSS sequence for the first RSS sequence and applying a second cyclic shift associated with the second RSS beam to the combination of the PSS and the SSS to produce the second base RSS sequence for the second RSS sequence. Here, the first base RSS sequence and the second base RSS sequence are different for different RSS beams.

[0147] In some aspects, generating each of the first RSS sequence and the second RSS sequence can include scrambling the first base RSS sequence with a first beam-specific scrambling sequence associated with the first RSS beam to form the first sequence and scrambling the second base RSS sequence with a second beam-specific scrambling sequence associated with the second RSS beam to form the second sequence, which can be performed by the scramble circuitry 706.

[0148] In some aspects, generating each of the first and second RSS sequences may include: initializing a PN sequence generator 704 using a cell ID of a cell associated with a RAN node (e.g., a base station) and a first beam index of a first RSS beam to generate a first beam-related scrambling sequence with a sequence bandwidth twice that of the RSS; and initializing the PN sequence generator 704 using the cell ID and a second beam index of a second RSS beam to generate a second beam-related scrambling sequence with a sequence bandwidth twice that of the RSS. Alternatively, generating each of the first and second RSS sequences may include: initializing the PN sequence generator 704 using a cell ID of a cell associated with a RAN node to generate an extended scrambling sequence, the extended scrambling sequence including both the first and second beam-related scrambling sequences, each having a sequence bandwidth twice that of the first RSS. In some examples, the extended scrambling sequence may include multiple segments, each segment being associated with a corresponding RSS beam among a plurality of RSS beams including the first and second beams.

[0149] In some aspects, the scrambled first sequence and the scrambled second sequence may each have a sequence bandwidth that is twice the bandwidth of the RSS. Therefore, generating the first RSS sequence and the second RSS sequence may include: modulating the first sequence using QPSK to form a first QPSK sequence, the first QPSK sequence corresponding to the first RSS sequence and including the bandwidth of the RSS; and modulating the second sequence using QPSK to form a second QPSK sequence, the second QPSK sequence corresponding to the second RSS sequence and including the bandwidth of the RSS, which may be performed by a QPSK modulator 708. In some aspects, the first QPSK sequence may include a first in-phase component and a first quadrature-phase component. The first in-phase component may include even-indexed elements of the first sequence, and the first quadrature-phase component may include odd-indexed elements of the first sequence. Similarly, the second QPSK sequence may include a second in-phase component and a second quadrature-phase component. The second in-phase component may include even-indexed elements of the second sequence, and the second quadrature-phase component may include odd-indexed elements of the second sequence.

[0150] In some aspects, the base station circuit 700 can beamform and quasi-co-locate each of one or more RSS beams with a corresponding SSB beam or CSI-RS beam. Different RSS sequences can be transmitted on different RSS beams. As described herein, the RSS sequence associated with the k-th RSS beam can be generated by RSS... k Let represent , where 0 <= k <k max RSS k It can be of length NRSS The QPSK sequence, and can be mapped to, for example, N in the center RB of the active BWP. RSS N consecutive resource elements (REs) such that N RSS (n), n = 0, 1, ..., (N) RSS -1), 0 <= k <k max RSS k The in-phase (I) and quadrature (Q) components can be obtained through a binary scrambling sequence C. k (n) is used for scrambling, as described in this paper, the binary scrambling sequence C k (n) is parameterized with respect to the beam index k, where 0 <= k <k max The I component can include even-indexed elements of the sequence, while the Q component can include odd-indexed elements of the sequence. In some aspects, k max This can represent the maximum number of RSS beams, which can be equivalent to the maximum number of SSB beams over a given carrier frequency range. For example, when k max When k = 4, the carrier frequency range can span up to approximately 3 GHz. As another example, when k... max When k = 8, the carrier frequency range can span from approximately 3 GHz to approximately 6 GHz. As another example, when k... max When the frequency is 64, the carrier frequency range can span from approximately 6 GHz to approximately 52.6 GHz.

[0151] Figure 7B This is a graph illustrating an example relationship 750 between RSS measurements based on several aspects. (See graph 750.) Figure 7BAs shown, an RSS may include a first measurement configuration 752 and a first measurement object 754. The first measurement configuration 752 and the first measurement object 754 may be linked to a first reporting configuration 756 via a first measurement ID 758. In some aspects, the first measurement configuration 752 and the first measurement object 754 may additionally or alternatively be linked to a second reporting configuration 760 via a second measurement ID 762. In some aspects, another RSS may include a second measurement configuration 764 and a second measurement object 766. The second measurement configuration 764 and the second measurement object 766 may be linked to a second reporting configuration 760 via a third measurement ID 768. In some aspects, the second measurement configuration 764 and the second measurement object 766 may additionally or alternatively be linked to a third reporting configuration 770 via a fourth measurement ID 772. In some aspects, yet another RSS may include a third measurement configuration 774 and a third measurement object 776. The third measurement configuration 774 and the third measurement object 776 may be linked to a third reporting configuration 770 via a fifth measurement ID 778. In some respects, the third measurement configuration 774 and the third measurement object 776 may additionally or alternatively be linked to the fourth report configuration 780 via the sixth measurement ID 782.

[0152] Figure 8 An example diagram of an extended scrambling sequence 800 based on some aspects is shown. For example... Figure 8 As shown, the extended scrambling sequence 800 may include a plurality of uniformly divided segments 802. Each segment in the plurality of uniformly divided segments 802 may be associated with a single RSS beam in a plurality of RSS beams. The k-th segment 804 in the plurality of uniformly divided segments 802 may be used for the scrambling sequence (C k (n)).

[0153] Figure 9 An exemplary diagram of OFDM symbol index 900 is shown according to some aspects. OFDM symbol index 900 represents a single RSS slot 902 comprising multiple symbols 904. When M=4 and the binary overlay code (C M When ) = [0 1 0 1], an RSS sequence can be generated (RSS k ) and its conjugate (RSS) k *) for transmission on an RSS beam (e.g., RSS beam k), and according to the binary overlay code C M Repeated across four OFDM symbols. For example... Figure 9 As shown, OFDM symbol index 900 includes a repeating RSS sequence and its conjugate for the first beam 906 and a repeating RSS sequence and its conjugate for the second beam 908. The RSS sequence and its conjugate for the first beam 906 can be determined according to the binary overlay code C. M([0 1 0 1]) Beamforming and repetition are performed across four OFDM symbols (2, 3, 4, and 5), where "0" indicates the RSS sequence and "1" indicates the conjugate RSS sequence. The RSS sequence used for the second beam 908 and its conjugate can be determined according to the binary overlay code C. M ([0 1 0 1]) Beamforming and repetition across four OFDM symbols (8, 9, 10 and 11), where “0” indicates the RSS sequence and “1” indicates the conjugate RSS sequence.

[0154] Figure 10 An exemplary figure 1000 is shown based on some aspects of RSS. For example... Figure 10 As shown, RSS 1002 can reside in one or more RBs 1004 of the Active Bandwidth Part (BWP) 1006. The bandwidth of the RSS (e.g., the number of RBs) can be greater than or equal to the upper limit or maximum length (N) of the RSS. RSS Divide by 12. In some respects, RSS 1002 may be aligned with the center RB of active BWP 1006. Furthermore, the first guard band 1008 and the second guard band 1010 may be positioned adjacent to RSS 1002 in RB 1004, such that RSS 1002, the first guard band 1006, and the third guard band 1010 occupy the entire bandwidth of active BWP 1006.

[0155] Figure 11 This is a block diagram illustrating an example of a hardware implementation of an exemplary RAN node 1100 employing a processing system 1114, according to some aspects. For example, the RAN node 1100 may be in... Figures 1-6 Any one of the base stations (e.g., gNB or eNB) shown in any one or more of the diagrams.

[0156] The RAN node 1100 can be implemented with a processing system 1114 that includes one or more processors 1104. Examples of processors 1104 include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform the various functionality described throughout this disclosure. In various examples, the RAN node 1100 can be configured to perform any one or more of the functions described herein. That is, the processor 1104 utilized in the RAN node 1100 can be for implementing any one or more of the processes described herein. In some cases, the processor 1104 can be implemented via a baseband or modem chip, while in other implementations the processor 1104 can itself include a plurality of devices distinct and different from a baseband or modem chip (e.g., in scenarios where such can work cooperatively to implement aspects discussed herein). And as noted above, various hardware arrangements and components outside of a baseband modem processor can be utilized in implementations, including RF chains, power amplifiers, modulators, buffers, interleavers, adders / subtractors, etc.

[0157] In this example, the processing system 1114 can be implemented with a bus architecture, as represented generally by the bus 1102. The bus 1102 can include any number of interconnecting buses and bridges depending on the specific application of the processing system 1114 and the overall design constraints. The bus 1102 communicatively couples various circuits including one or more processors, generally represented by the processor 1104, and computer-readable media, generally represented by the computer-readable storage medium 1106. The bus 1102 can also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, all of which are well known in the art, and therefore, will not be described any further. A bus interface 1108 provides an interface between the bus 1102 and a transceiver 1110. The transceiver 1110 provides a communication path for signals communicated to and from the various other apparatus over a transmission medium (e.g., an air interface). A user interface 1112 (e.g., keypad, display, speaker, microphone, joystick) can also be provided.

[0158] The processor 1104 is responsible for managing the bus 1102 and general processing, including the execution of software stored on the computer-readable storage medium 1106. The software, when executed by the processor 1104, causes the processing system 1114 to perform the various functions described herein for any particular apparatus. The computer-readable storage medium 1106 can also be used for storing data that is manipulated by the processor 1104 when executing software.

[0159] One or more processors 1104 in the processing system can execute software. Software shall be construed broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. The software can reside on a computer-readable storage medium 1106.

[0160] The computer-readable storage medium 1106 can be a non-transitory computer-readable medium. A non-transitory computer-readable medium includes, for example, magnetic storage devices (e.g., hard disk; floppy disk); optical disk devices (e.g., compact disk (CD), digital versatile disk (DVD)); smart cards; flash memory devices (e.g., card, stick, or key drive); random access memories (RAMs); read only memories (ROMs); programmable ROMs (PROMs); erasable PROMs (EPROMs); electrically erasable PROMs (EEPROMs); registers; removable disk; and any other suitable medium for storing software and / or instructions that can be accessed and read by a computer. The computer-readable storage medium 1106 can reside in the processing system 1114, the processing system 1114, or distributed across multiple entities including the processing system 1114. The computer-readable storage medium 1106 can be embodied in a computer program product. By way of example, a computer program product can include a computer-readable medium in packaging material. Those skilled in the art will recognize how to best im plement the present disclosure depending upon the particular application and the overall design constraints imposed on the overall system by the particular application.

[0161] In some aspects, the processor 1104 can include circuitry configured for various functions. For example, the processor 1104 can include a reference signal generation circuitry 1142 configured to generate one or more reference signals as described herein and including an RSS for an active BWP of a plurality of BWPs. The reference signal generation circuitry 1142 can be further configured to execute reference signal generation instructions 1152 stored in the computer-readable storage medium 1106 to implement any of one or more of the functions described herein.

[0162] The processor 1104 can also include a transmission circuit 1144 configured to transmit, via the transceiver 1110, an RSS in an active BWP, where a bandwidth of the RSS is based on a bandwidth of the active BWP. In some aspects, the transmission circuit 1144 can be configured to transmit, via the transceiver 1110, at least one of a SIB message or an RRC message that identifies a power offset of the RSS relative to an SSB reference signal. Subsequently, the transmission circuit 1144 can be configured to transmit, via the transceiver 1110, the RSS in the active BWP and with a power that is increased relative to a power of the SSB reference signal based on the power offset, where a bandwidth of the RSS is based on a bandwidth of the active BWP. In addition, the transmission circuit 1144 can also be configured to transmit, via the transceiver 1110, an additional message that can be received by one or more UEs. The transmission circuit 1144 can also be configured to execute transmission instructions 1154 stored in the computer-readable storage medium 1106 to implement any of the one or more functions described herein.

[0163] The processor 1104 can also include a communication link utilization circuit 1146 configured to utilize a communication link with a UE based on the RSS. The communication link utilization circuit 1146 can also be configured to execute communication link utilization instructions 1156 stored in the computer-readable storage medium 1106 to implement any of the one or more functions described herein.

[0164] Figure 12 FIG. 12 is a flowchart 1200 of a method of generating and utilizing an RSS in a wireless communication system in accordance with some aspects. As described below, some or all illustrated features can be omitted in some implementations, and some implementations can include additional features not shown in the figures. In some examples, the method can be performed by the RAN node 1100 as described above and shown in FIG. 11, by a processor or processing system, or by any suitable means for Figure 11 performing the described functions.

[0165] At block 1202, the RAN node 1100 can generate an RSS for a BWP of a plurality of BWPs. In some aspects, the active BWP does not include an SSB. A bandwidth of the RSS can be based on a bandwidth of the active BWP. In certain aspects, the bandwidth of the RSS can be scalable to the bandwidth of the active BWP. For example, a first active BWP can have a bandwidth that is greater than a bandwidth of a second active BWP. The RSS generated for transmission in the first active BWP can be greater than the RSS generated for transmission in the second active BWP. Conversely, the RSS generated for transmission in the second active BWP can be less than the RSS generated for transmission in the first active BWP. In certain aspects, the bandwidth of the RSS can be scalable in proportion to the bandwidth of the active BWP. For example, a bandwidth of a first active BWP can be twice a bandwidth of a second active BWP. The RSS generated for transmission in the first active BWP can be twice as large as the RSS generated for transmission in the second active BWP. Conversely, the RSS generated for transmission in the second active BWP can be twice as small as the RSS generated for transmission in the first active BWP. The generation of the RSS for the active BWP of the plurality of BWPs can be further described with reference to the descriptions of FIGS. 7B, 8, and 9 provided herein. Figure 6 、 7A , 7B, 8, and 9 provided herein. Figure 11 The reference signal generation circuitry 1142 shown and described above in connection with FIG. 7B can generate the RSS for the active BWP of the plurality of BWPs on the RAN node. In some aspects, the RAN node 1100 can generate a measurement object and a measurement reporting configuration for the RSS.

[0166] At block 1204, the RAN node 1100 can transmit the RSS in a BWP of a downlink (DL) and a bandwidth of the RSS is based on a bandwidth of the BWP. For example, the RAN node 1100 can transmit the RSS in an active BWP of a plurality of BWPs and a UE can receive the RSS in the active BWP of the plurality of BWPs. In some aspects, a duration of the RSS is based on an active time of the active downlink BWP. In certain aspects, the RSS can be transmitted in a single symbol or multiple symbols of the active BWP. In some aspects, the RSS can be transmitted in a set of contiguous RBs that are aligned with a preconfigured frequency raster associated with the active BWP or in a contiguous set of resource blocks (RBs) of the active BWP. In some aspects, the RSS can be transmitted on a set of symbols within a set of slots configured by the RAN node 1100. The bandwidth of the RSS can be greater than or equal to an upper limit or maximum length (N RSSDivide by 12. In some respects, the first guard band and the second guard band can be positioned adjacent to the RSS in the RB, such that the RSS in the RB, the first guard band, and the second guard band occupy the entire bandwidth of the active BWP.

[0167] As described herein, RAN node 1100 can transmit RSS on one or more RSS beams (such as a first RSS beam and a second RSS beam). RAN node 1100 can transmit each of the one or more RSS beams by quasi-co-addressing each of the one or more RSS beams with a Synchronization Signal Block (SSB) beam. RAN node 1100 can transmit each of the one or more RSS beams in a Channel State Information Reference Signal (CSI-RS) beam. RAN node 1100 can transmit RSS repetitions on the same RSS beam in one or more RSS beams within multiple RSS time slots. Each of these repetitions can be time-division multiplexed within the RSS time slot. In some aspects, RSS repetitions can be transmitted in consecutive symbols of the RSS time slot. RAN node 1100 can transmit RSS in at least one of multiple time slots. At least one RSS time slot can be pre-configured for an active BWP. In some aspects, RAN node 1100 can send RSS measurement objects and measurement report configurations to the UE.

[0168] In some respects, RAN node 1100 can beamform and quasi-co-address each of one or more RSS beams with the corresponding Synchronization Signal Block (SSB) beam. Different RSS sequences can be transmitted on different RSS beams. As described herein, the RSS sequence associated with the k-th RSS beam can be generated by RSS... k Let represent , where 0 <= k <k max RSS k It can be of length N RSS The QPSK sequence, and can be mapped to, for example, the N in the center RB of the active BWP. RSS N consecutive resource elements (REs) such that N RSS (n), n = 0, 1, ..., (N) RSS -1), 0 <= k <k max RSS k The in-phase (I) and quadrature (Q) components can be obtained through a binary scrambling sequence C. k The binary scrambling sequence C is scrambled using (n), as described in this paper. k (n) is parameterized with respect to the beam index k, where 0 <= k <k maxThe I component can include even indexed elements of the sequence, and the Q component can include odd indexed elements of the sequence. In some aspects, k max may represent a maximum number of RSS beams, which can be equivalent to a maximum number of SSB beams at a given carrier frequency range. For example, when k max = 4, the carrier frequency range can span up to approximately 3 GHz. As another example, when k max = 8, the carrier frequency range can span down to approximately 3 GHz and up to approximately 6 GHz. As yet another example, when k max = 64, the carrier frequency range can span down to approximately 6 GHz and up to approximately 52.6 GHz.

[0169] In some aspects, the RAN node 1100 can transmit at least one of a system information block (SIB) message or a radio resource control (RRC) message that identifies at least one RSS slot for the active BWP. For example, the RAN node 1100 can transmit the RSS in at least one RSS slot of a plurality of slots. Prior to transmitting the RSS, the RAN node 1100 can transmit at least one of the SIB message or the RRC message so that the UE can identify the at least one RSS slot for the active BWP. The above-described transmitting circuitry 1144, together with the transceiver 1110, can transmit the RSS. Figure 11 The above-described transmitting circuitry 1144, together with the transceiver 1110, can transmit the RSS.

[0170] At block 1206, the RAN node 1100 can utilize a communication link with the UE based on the RSS measurement. Utilizing the communication link with the UE based on the RSS can include at least one of: receiving, from the UE, a measurement report based on the measurement of the RSS; receiving, from the UE, an indication of an adjustment to a tracking loop based on the measurement of the RSS; or receiving, from the UE, an indication of an update to one or more reception or transmission parameters based on the measurement of the RSS. In some examples, utilizing the communication link with the UE based on the measurement can include receiving a measurement report (e.g., a CSI report) transmitted by the UE; and utilizing the measurement report to adapt transmissions to current channel conditions. In some examples, utilizing the communication link with the UE based on the measurement can include adjusting a tracking loop of the UE based on the measurement. In some examples, utilizing the communication link with the UE based on the measurement can include updating one or more reception or transmission parameters of the UE.

[0171] The above-described communication link utilizing circuitry 1146, together with the transceiver 1110, can utilize the communication link between the RAN node 1100 and the UE. Figure 11 The above-described communication link utilizing circuitry 1146, together with the transceiver 1110, can utilize the communication link between the RAN node 1100 and the UE.

[0172] Figure 13is a flowchart 1300 of a method of generating and utilizing an RSS in a wireless communication system in accordance with some aspects. As described below, some or all illustrated features can be omitted in some implementations, and some implementations can include additional functionalities not discussed below. In some examples, the method can be performed by a RAN node 1100 as shown in FIG. 11, by a processor or processing system, or by any suitable means for carrying out the described functions. Figure 11 The method can be performed by the RAN node 1100 as shown in FIG. 11, by a processor or processing system, or by any suitable means for carrying out the described functions.

[0173] At block 1302, the RAN node 1100 can generate an RSS for an active BWP of a plurality of BWPs. The features described herein in relation to block 1302 can include one or more of the same or similar features described herein in relation to block 1202 of flowchart 1200 as shown in Figure 12

[0174] At block 1304, the RAN node 1100 can transmit at least one of a SIB message or an RRC message identifying a power offset of the RSS relative to a synchronization signal block (SSB) reference signal. For example, the RAN node 1100 can transmit at least one of a system information block (SIB) message or a radio resource control (RRC) message identifying a power offset of the RSS relative to a synchronization signal block (SSB) reference signal prior to the RAN node 1100 transmitting the RSS in the active BWP of the plurality of BWPs. The RAN node 1100 can then transmit the RSS in the active BWP of the plurality of BWPs and with a power that is increased based on the power offset relative to a power of the SSB reference signal. The transmitting circuitry 1144, together with the transceiver 1110, shown and described above in relation to Figure 11 The transmitting circuitry 1144, together with the transceiver 1110, shown and described above in relation to block 1204 of flowchart 1200 can transmit at least one of a SIB message or an RRC message identifying a power offset of the RSS relative to a synchronization signal block (SSB) reference signal. In some aspects, the power offset can be indicated in SI or by dedicated RRC signaling.

[0175] At block 1306, the RAN node 1100 can transmit the RSS in the active BWP and with a power that is increased based on the power offset relative to a power of the SSB reference signal, where a first bandwidth of the RSS is based on a second bandwidth of the active BWP. Moreover, the features described herein in relation to block 1306 can include one or more of the same or similar features described herein in relation to block 1204 of flowchart 1200 as shown in Figure 12 Figure 11 The transmitting circuitry 1144, together with the transceiver 1110, shown and described above in relation to block 1306 can transmit the RSS.

[0176] ​​At box 1308, RAN node 1100 can utilize the communication link with the UE based on RSS. The features described herein with respect to box 1308 may include those described herein with respect to... Figure 12 One or more of the same or similar features described in block 1206 of flowchart 1200 shown in the figure.

[0177] In one configuration, RAN node 1100 may include tools for performing operations related to... Figures 1-6 The various functional and process units described in 12, 13, 15 and / or 16. In one aspect, the aforementioned units may be in Figure 11 The processor 1104 shown is configured to perform the functions described by the aforementioned unit. Alternatively, the aforementioned unit may be a circuit or any device configured to perform the functions described by the aforementioned unit.

[0178] Of course, in the above example, the circuitry included in processor 1104 is provided merely as an example, and other units for performing the described functions may be included within various aspects of this disclosure, including but not limited to instructions stored in computer-readable storage medium 1106, or in Figures 1-6 Any other suitable device or unit described in any of the figures 12, 13, 15 and / or 16.

[0179] Figure 14 This is a block diagram illustrating an example of a hardware implementation of a wireless communication device 1400 employing a processing system 1414, according to some aspects. For example, the wireless communication device 1800 may correspond to the one described above. Figures 1-6 Any one of the UEs shown and described in any one or more of Figures 15 and / or 16.

[0180] Depending on various aspects, the processing system 1414 can be used to implement elements, any part of elements, or any combination of elements, and includes one or more processors 1404. The processing system 1414 can be used with... Figure 11 The processing system 1114 shown is substantially the same as that described above, including a bus interface 1408, a bus 1402, a processor 1404, and a computer-readable storage medium 1406. Furthermore, the wireless communication device 1400 may include a user interface 1412 and a transceiver 1410, which are substantially similar to those described above. Figure 11 Those described herein. That is, the processor 1404, as utilized in the wireless communication device 1400, can be used to implement any one or more of the processes described herein.

[0181] In some aspects, the processor 1404 can include circuitry configured for various functions. For example, the processor 1404 can include reception circuitry 1442 configured to receive, via the transceiver 1410, an RSS for an active BWP of a plurality of BWPs from a RAN node (e.g., a base station, such as a gNB or eNB). A bandwidth of the RSS can be based on a bandwidth of the active BWP.

[0182] The reception circuitry 1442 can include one or more hardware components that provide a physical structure that performs processes related to wireless communication (e.g., signal reception and / or signal transmission) and signal processing (e.g., processing received signals and / or processing signals for transmission). For example, the reception circuitry 1442 can be configured to receive information and data from a base station via one or more subframes and / or time slots. Further, the reception circuitry 1442 can also be configured to receive additional messages from the base station via the transceiver 1810.

[0183] In some aspects, the reception circuitry 1442 can be configured to receive, via the transceiver 1410, at least one of a SIB message or a RRC message that identifies a power offset of the RSS relative to a SSB reference signal. Subsequently, the reception circuitry 1442 can be configured to transmit, via the transceiver 1410, the RSS in the active BWP and with a power that is increased relative to a power of the SSB reference signal based on the power offset, where a bandwidth of the RSS is based on a bandwidth of the active BWP. Further, the reception circuitry 1442 can also be configured to receive, via the transceiver 1410, additional messages that can be transmitted by one or more RAN nodes. The reception circuitry 1442 can also be configured to execute reception software 1452 stored on the computer-readable storage medium 1406 to implement one or more functions described herein.

[0184] The processor 1404 can also include measurement performance circuitry 1444 configured to perform measurements of one or more reference signals including the RSS received by the reception circuitry 1442. For example, the wireless communication device 1400 can receive the RSS in the active BWP of the plurality of BWPs, and perform measurements of the RSS after receiving the RSS. The measurement performance circuitry 1444 can also be configured to execute measurement performance instructions 1454 stored on the computer-readable storage medium 1406 to implement one or more functions described herein.

[0185] The processor 1404 can also include communication link utilization circuitry 1446 configured to utilize a communication link between the wireless communication device 1400 and the RAN node based on the RSS measurements.

[0186] The communication link utilization circuitry 1446 can also be configured to execute communication link utilization software 1456 stored on computer-readable storage medium 1406 to implement one or more functions described herein.

[0187] Figure 15 FIG. 15 is a flow diagram 1500 of a method of receiving and utilizing RSS in a wireless communication system in accordance with some aspects. As described below, some or all illustrated features can be omitted in some implementations, and some implementations can include additional features not shown in the figures. Additionally, one or more features can be utilized in a particular implementation, and the particular implementation may- not utilize all of the features described below. In some examples, the method can be performed by the wireless communication device 1400 as described above and illustrated in FIG. 14, by a processor or processing system, or by any suitable means for Figure 14 performing the described functions.

[0188] At block 1502, the wireless communication device 1400 can receive a resynchronization signal (RSS) from a radio access network (RAN) node in a downlink (DL) BWP of a plurality of bandwidth parts (BWPs). In some aspects, a first bandwidth and a first duration of the RSS can be based on a second bandwidth and a second duration of the DL BWP. The bandwidth of the RSS can be based on the bandwidth of the active BWP. In certain aspects, the bandwidth of the RSS can be scalable to the bandwidth of the active BWP. For example, a first active BWP can have a bandwidth that is greater than a bandwidth of a second active BWP. The RSS received in the first active BWP can be greater than the RSS received in the second active BWP. Conversely, the RSS received in the second active BWP can be less than the RSS received in the first active BWP. In certain aspects, the bandwidth of the RSS can be scalable in proportion to the bandwidth of the active BWP. For example, a first active BWP can have a bandwidth that is twice the bandwidth of a second active BWP. The RSS received in the first active BWP can be twice as large as the RSS received in the second active BWP. Conversely, the RSS received in the second active BWP can be twice as small as the RSS received in the first active BWP. The received RSS for an active BWP of the plurality of BWPs can be further described with respect to the descriptions of the received RSS for the active BWP of the plurality of BWPs provided herein. Figure 6 , 7A 7B, 8, and 9. The receiving circuitry 1442 shown and described above in connection with Figure 14 may receive the RSS for an active BWP of the plurality of BWPs generated on the RAN node.

[0189] In certain aspects, the wireless communication device 1400 can receive the RSS in a single symbol or multiple symbols of the active BWP. In some aspects, the RSS can be received in a set of contiguous RBs that are aligned with a preconfigured frequency raster associated with the active BWP or in a contiguous set of resource blocks (RBs) of the active BWP. The bandwidth of the RSS can be greater than or equal to an upper limit or maximum length (N RSS ) divided by 12. In some aspects, the first guard band and the second guard band can be positioned adjacent to the RSS in the RBs such that the RSS in the RBs, the first guard band, and the second guard band occupy an entire bandwidth of the active BWP.

[0190] As described herein, the wireless communication device 1400 can receive the RSS on one or more RSS beams, such as a first RSS beam and a second RSS beam. The wireless communication device 1400 can receive each of the one or more RSS beams via quasi co-location of the each of the one or more RSS beams with a synchronization signal block (SSB) beam or a CSI-RS beam. The wireless communication device 1400 can receive a repetition of the RSS on a same one of the one or more RSS beams in an RSS slot of a plurality of RSS slots. Each of the repetitions can be time division multiplexed in the RSS slot. In some aspects, the repetition of the RSS can be transmitted in consecutive symbols of the RSS slot. The wireless communication device 1400 can receive the RSS in at least one RSS slot of the plurality of slots. The at least one RSS slot can be preconfigured for the active BWP.

[0191] In certain aspects, the wireless communication device 1400 can receive the RSS in each of the one or more RSS beams that are beamformed with and quasi co-located with a respective synchronization signal block (SSB) beam. Different RSS sequences can be transmitted on different RSS beams. As described herein, an RSS sequence associated with the kthRSS beam can be represented by RSS k , where 0 <= k < k max . The RSS k may be a QPSK sequence of length N RSS , and can be mapped to, for example, N RSS consecutive resource elements (REs) in a center RB of the active BWP, such that N RSS (n), n = 0, 1,..., (N RSS - 1), 0 <= k < k max . The in-phase (I) component and the quadrature (Q) component of the RSS k may be scrambled by a binary scrambling sequence C k (n) as described herein.k (n) is parameterized with respect to beam index k, where 0 <= k < k max The I component can include even indexed elements of the sequence, and the Q component can include odd indexed elements of the sequence. In some aspects, k max may represent a maximum number of RSS beams, which can be equivalent to a maximum number of SSB beams at a given carrier frequency range. For example, when k max = 4, the carrier frequency range can span up to approximately 3 GHz. As another example, when k max = 8, the carrier frequency range can span down to approximately 3 GHz and up to approximately 6 GHz. As yet another example, when k max = 64, the carrier frequency range can span down to approximately 6 GHz and up to approximately 52.6 GHz. In some aspects, the RSS beams can be periodically or semi-statically transmitted, and the periodicity can be preconfigured by a RAN node or other network entity and indicated in system information (SI) or dedicated RRC signaling.

[0192] In some aspects, the wireless communication device 1400 can receive at least one of a system information block (SIB) message or a radio resource control (RRC) message that identifies at least one RSS slot for the active BWP. For example, the wireless communication device 1400 can receive the RSS in at least one RSS slot of a plurality of slots. Prior to receiving the RSS, the wireless communication device 1400 can receive at least one of the SIB message or the RRC message, such that the wireless communication device 1400 can identify the at least one RSS slot for the active BWP. The reception circuitry 1442 shown and described herein in connection with the transceiver 1410 can receive the RSS. Figure 14

[0193] ​At block 1504, the wireless communication device 1400 can perform a measurement of the RSS. For example, the wireless communication device 1400 can have received the RSS in an active BWP of the plurality of BWPs. Subsequently, the wireless communication device 1400 can perform a measurement of the RSS on the RSS beam. In some aspects, after performing the measurement of the RSS, the UE 602 can utilize the measurement of the RSS for radio resource management (RRM) or radio link monitoring (RLM) in different radio resource control (RRC) states of the UE 602 based on a measurement object (e.g., configuration information) and a measurement reporting configuration. The UE 602 can also combine the measurement of the RSS with a paging signal or wake-up signal detection of the UE 602. For example, the wireless communication device 1400 can select a tracking loop for receiving and measuring the RSS based on a received measurement object. As another aspect, the wireless communication device 1400 can measure the RSS using one or more resource elements and / or one or more slots based on a received measurement object. As yet another aspect, the wireless communication device 1400 can measure the RSS and provide a measurement of the RSS to a scheduling entity according to a measurement report. The aspects described herein can be applicable to a UE 602 receiving a paging signal or wake-up signal from a RAN node. Figure 14 The measurement performing circuitry 1444 shown and described can perform the measurement of the RSS.

[0194] At block 1506, the wireless communication device 1400 can utilize a communication link with a RAN node based on the measurement of the RSS. In some examples, utilizing the communication link with the RAN node based on the measurement can include at least one of the wireless communication device 1400 transmitting a measurement report (such as a CSI report) generated based on the RSS measurement to the RAN node, the wireless communication device 1400 adjusting a tracking loop based on the measurement, or the wireless communication device 1400 updating one or more reception or transmission parameters based on the measurement. In some examples, utilizing the communication link with the RAN node based on the measurement can include the wireless communication device 1400 adjusting a tracking loop of the wireless communication device based on the measurement. Examples of the tracking loop can include a time tracking loop (TTL), a frequency tracking loop (FTL), a power delay profile estimation loop, and / or an automatic gain control (AGC) loop. In some examples, utilizing the communication link with the RAN node based on the measurement can include the wireless communication device updating one or more reception or transmission parameters of the UE. The aspects described above in connection with Figure 14 The communication link utilizing circuitry 1446 shown and described can utilize the communication link, along with the transceiver 1410.

[0195] Figure 16is a flowchart 1600 of a method of receiving and utilizing RSS in a wireless communication system in accordance with some aspects. As described below, some or all illustrated features can be omitted in some implementations, and some implementations can include additional functionalities not discussed below. In some examples, the method can be performed by the wireless communication device 1400 as shown in FIG. 14, by a processor or processing system, or by any suitable means for carrying out the described functions. Figure 14 The method can be performed by the wireless communication device 1400 as shown in FIG. 14, by a processor or processing system, or by any suitable means for carrying out the described functions.

[0196] At block 1602, the wireless communication device 1400 can receive at least one of a SIB message or a RRC message identifying a power offset of the RSS relative to a synchronization signal block (SSB) reference signal. For example, prior to receiving the RSS in an active BWP of a plurality of BWPs, the wireless communication device 1400 can receive at least one of a system information block (SIB) message or a radio resource control (RRC) message identifying a power offset of the RSS relative to a synchronization signal block (SSB) reference signal. The wireless communication device 1400 can then receive the RSS in the active BWP of the plurality of BWPs and with a power that is increased based on the power offset relative to a power of the SSB reference signal. The receiving circuitry 1442, together with the transceiver 1410, shown and described herein can receive at least one of a SIB message or a RRC message identifying a power offset of the RSS relative to a synchronization signal block (SSB) reference signal. In some aspects, the power offset can be indicated in SI or by dedicated RRC signaling. Figure 14 The receiving circuitry 1442, together with the transceiver 1410, shown and described herein can receive at least one of a SIB message or a RRC message identifying a power offset of the RSS relative to a synchronization signal block (SSB) reference signal. In some aspects, the power offset can be indicated in SI or by dedicated RRC signaling.

[0197] At block 1604, the wireless communication device 1400 can receive the RSS in the active BWP and with a power that is increased based on the power offset relative to a power of the SSB reference signal, where a first bandwidth of the RSS is based on a second bandwidth of the active BWP. Moreover, the features described herein with respect to block 1604 can include one or more of the same or similar features described herein with respect to block 1502 of flowchart 1500 shown and described in Figure 15 The receiving circuitry 1442, together with the transceiver 1410, shown and described herein can receive the RSS. Figure 14 The receiving circuitry 1442, together with the transceiver 1410, shown and described herein can receive the RSS.

[0198] At block 1606, the wireless communication device 1400 can perform measurements of the RSS. The features described herein with respect to block 1606 can include one or more of the same or similar features described herein with respect to block 1504 of flowchart 1500 shown and described in Figure 15 The features described herein with respect to block 1606 can include one or more of the same or similar features described herein with respect to block 1504 of flowchart 1500 shown and described in

[0199] At block 1608, the wireless communication device 1400 can utilize a communication link with a RAN node based on the measurement of the RSS. The features described herein with respect to block 1608 can include one or more of the same or similar features described herein with respect to block 1506 of flowchart 1500 illustrated in FIG. 15. Figure 15

[0200] In one configuration, the wireless communication device 1400 can include means for performing the various functions and processes described with respect to Figures 1-6 , 12, 13, 15, and / or 16. In one aspect, the aforementioned means can be the processor 1404 shown in FIG. 14 configured to perform the functions recited by the aforementioned means. In another aspect, the aforementioned means can be circuitry or any apparatus configured to perform the functions recited by the aforementioned means. Figure 14

[0201] Of course, in the above examples, the circuitry included in the processor 1404 is merely provided as an example, and other means for performing the described functions can be included within various aspects of the present disclosure, including but not limited to the instructions stored in the computer-readable storage medium 1406, or any other suitable apparatus or means described in any one of Figures 1-6 , 12, 13, 15, and / or 16.

[0202] Aspect 1 : A user equipment (UE) can receive a resynchronization signal (RSS) from a radio access network (RAN) node in a downlink (DL) bandwidth part (BWP) of a plurality of BWPs. A first bandwidth and a first time duration of the RSS are based on a second bandwidth and a second time duration of the DL BWP. The UE can further perform a measurement of the RSS. The UE can further utilize a communication link with the RAN node based on the measurement.

[0203] Aspect 2: The UE of aspect 1, wherein the utilizing the communication link with the RAN node based on the measurement can include one or more of: receiving a measurement object and a measurement reporting configuration for the RSS; transmitting a measurement report obtained from the measurement to the RAN node; adjusting a tracking loop of the UE based on the measurement; or updating one or more reception or transmission parameters of the UE based on the measurement.

[0204] ​​Aspect 3: The UE of aspect 1, after performing the measurement of the RSS, the UE can further: utilize the measurement of the RSS for radio resource management (RRM) or radio link monitoring in different radio resource control (RRC) states of the UE based on measurement objects and measurement reporting configurations; and combine the measurement of the RSS with paging signal or wake-up signal detection of the UE.

[0205] Aspect 4: The UE of aspect 1, wherein the receiving the RSS in the active BWP can include receiving the RSS in a single symbol of the active BWP.

[0206] Aspect 5: The UE of aspect 1, the receiving the RSS in the active BWP includes receiving the RSS in a plurality of symbols of the active BWP. The plurality of symbols can span one or more slots of the active BWP.

[0207] Aspect 6: The UE of aspect 1, the receiving the RSS in the downlink BWP can include receiving the RSS in a set of contiguous resource blocks (RBs) configured by the RAN node; and receiving the RSS on a set of symbols within a set of slots configured by the RAN node.

[0208] Aspect 7: The UE of aspect 6, the RSS and two adjacent guard bands can occupy the second bandwidth of the active BWP.

[0209] Aspect 8: The UE of aspect 1, the receiving the RSS in the active BWP can include receiving the RSS in a set of contiguous resource blocks (RBs) aligned with a center RB of the active BWP.

[0210] Aspect 9: The UE of aspect 1, the receiving the RSS in the active BWP can include receiving the RSS in a set of contiguous resource blocks (RBs) aligned with a preconfigured frequency raster associated with the active BWP.

[0211] Aspect 10: The UE of aspect 1, the first bandwidth of the RSS can be scalable in proportion to the second bandwidth of the active BWP.

[0212] Aspect 11: The UE of aspect 1 can further perform the following operations: receiving at least one of a system information block (SIB) message or a radio resource control (RRC) message that identifies a power offset of the RSS with respect to a synchronization signal block (SSB) reference signal, receiving the RSS with increased power with respect to a power of the SSB reference signal based on the power offset, receiving at least one of a SIB message or a RRC message that indicates a time and frequency configuration of the RSS, and receiving the RSS based on the time and frequency configuration indicated in the SIB message or the RRC message.

[0213] Aspect 12: The UE of aspect 11, the power offset is received via system information (SI) or via a dedicated radio resource control (RRC) signal.

[0214] Aspect 13: The UE of aspect 1, receiving the RSS in the downlink BWP can comprise receiving the RSS on one or more RSS beams in at least one RSS slot of a plurality of RSS slots periodically or semi-statically, wherein a periodicity and a time offset of each RSS slot of the plurality of RSS slots associated with reception of each of the one or more RSS beams is preconfigured by the RAN node and received via system information (SI) or a dedicated RRC signal.

[0215] Aspect 14: The UE of aspect 13, the one or more RSS beams can be received periodically or semi-statically, and the periodicity of the reception of the one or more RSS beams can be preconfigured by the RAN node and received via system information (SI) or a dedicated radio resource control (RRC) signal.

[0216] Aspect 15: The UE of aspect 14, the one or more RSS beams can comprise at least a first RSS beam and a second RSS beam, the RSS can comprise at least a first RSS sequence and a second RSS sequence, the first RSS sequence can be received in the first RSS beam, and the second RSS sequence can be received in the second RSS beam.

[0217] Aspect 16: The UE of aspect 15, each of the first RSS sequence and the second RSS sequence can comprise a base RSS sequence, and the base RSS sequence can be a function of a cell identifier (ID) of the RAN node and can be based on a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0218] Aspect 17: The UE of aspect 16, the first RSS sequence can comprise a first sequence comprising the base RSS sequence scrambled with a first beam-dependent scrambling sequence associated with the first RSS beam, and the second RSS sequence can comprise a second sequence comprising the base RSS sequence scrambled with a second beam-dependent scrambling sequence associated with the second RSS beam.

[0219] Aspect 18: The UE of aspect 17, the first RSS sequence can comprise a first quadrature phase shift keying (QPSK) sequence based on the first sequence, and the second RSS sequence can comprise a second QPSK sequence based on the second sequence.

[0220] Aspect 19: The UE of aspect 16, the base RSS sequence can comprise the PSS interleaved with the SSS; the base RSS sequence can comprise a weighted combination of the PSS and the SSS; or the base RSS sequence can comprise the PSS multiplexed with the SSS.

[0221] Aspect 20: The UE of aspect 19, the base RSS sequence can comprise a first base RSS sequence associated with the first RSS sequence and a second base RSS sequence associated with the second RSS sequence; the first base RSS sequence can comprise a first cyclic shift of the combination of the PSS and the SSS; the second base RSS sequence can comprise a second cyclic shift of the combination of the PSS and the SSS; the first cyclic shift can be associated with the first RSS beam; and the second cyclic shift can be associated with the second RSS beam.

[0222] Aspect 21: The UE of aspect 15, each of the first RSS sequence and the second RSS sequence can comprise a base RSS sequence, and the base RSS sequence can comprise only one of a primary synchronization signal (PSS) or a secondary synchronization signal (SSS).

[0223] Aspect 22: The UE of aspect 13, each RSS beam of the one or more RSS beams can be quasi co-located with a respective synchronization signal block (SSB) beam or channel state information reference signal (CSI-RS) beam.

[0224] Aspect 23: The UE of aspect 13, the receiving the RSS on the one or more RSS beams can include receiving repetitions of the RSS on a same RSS beam of the one or more RSS beams in an RSS slot of a plurality of RSS slots, wherein each of the repetitions can be time division multiplexed in the RSS slot, and wherein the receiving the repetitions of the RSS can be received in consecutive symbols of the RSS slot.

[0225] Aspect 24: The UE of aspect 23, the receiving the repetitions of the RSS can include receiving the repetitions of the RSS in consecutive symbols of the RSS slot.

[0226] Aspect 25: The UE of aspect 24, each of the repetitions of the RSS can include the RSS or a conjugate of the RSS based on a binary cover code.

[0227] Aspect 26: The UE of aspect 13, the receiving the RSS on the one or more RSS beams can include receiving the RSS in at least one RSS slot of a plurality of slots.

[0228] Aspect 27: The UE of aspect 26, the at least one RSS slot can be preconfigured for the active BWP.

[0229] Aspect 28: The UE of aspect 26, the UE can further receive at least one of a system information block (SIB) message or a radio resource control (RRC) message that identifies the at least one RSS slot for the active BWP.

[0230] Aspect 29: The UE of aspect 26, the RSS can include a plurality of RSSs that are orthogonal or quasi-orthogonal and multiplexed in a time domain, a frequency domain, a code domain, or a spatial domain; the plurality of RSSs can include a plurality of RSS beams; and the receiving the plurality of RSSs in the downlink BWP can include receiving the plurality of RSSs across the plurality of RSS beams in at least one RSS slot, each of the plurality of RSSs can be received on one RSS beam of the plurality of RSS beams.

[0231] Aspect 30: The UE of aspect 11, the active BWP can not include a synchronization signal block (SSB).

[0232] Aspect 31 : The UE of aspect 11 can further perform operations of: identifying another active BWP of the plurality of BWPs; switching from the active BWP to the another active BWP based on dynamic signaling, semi-statically configured time, or RRC signaling; and receiving another RSS for the another active BWP.

[0233] Aspect 32: A radio access network (RAN) node can perform operations of: generating a resynchronization signal (RSS) for a bandwidth part (BWP) of a plurality of BWPs. The RAN node can further perform operations of: transmitting the RSS in the BWP of a downlink (DL) to a user equipment (UE), wherein a first bandwidth of the RSS is based on a second bandwidth of the BWP. The first bandwidth of the RSS can be based on the second bandwidth of an active BWP. The UE can further perform operations of: utilizing a communication link with the UE based on the RSS, wherein the utilizing the communication link with the UE based on the RSS comprises at least one of: receiving, from the UE, a measurement report based on a measurement of the RSS, receiving, from the UE, an indication of an adjustment to a tracking loop based on the measurement of the RSS, or receiving, from the UE, an indication of an update to one or more reception or transmission parameters based on the measurement of the RSS.

[0234] Aspect 33: The RAN node of aspect 32, the utilizing the communication link with the UE based on the RSS can comprise one or more of: receiving, from the UE, a measurement report obtained from a measurement based on the RSS; receiving, from the UE, an indication of an adjustment to a tracking loop obtained from the measurement based on the RSS; or receiving, from the UE, an indication of an update to one or more reception or transmission parameters of the UE obtained from the measurement based on the RSS.

[0235] Aspect 34: The RAN node of aspect 32, a duration of the RSS can be based on an active time of the active downlink BWP.

[0236] Aspect 35: The RAN node of aspect 32, the transmitting the RSS in the active BWP can comprise transmitting the RSS in a single symbol of the active BWP.

[0237] Aspect 36: The RAN node of aspect 32, the transmitting the RSS in the active BWP can comprise transmitting the RSS in a plurality of symbols of the active BWP. The plurality of symbols can span one or more slots of the active BWP.

[0238] Aspect 37: The RAN node of Aspect 32, the transmitting the RSS in the active BWP can include transmitting the RSS in a center resource block (RB) of the active BWP.

[0239] Aspect 38: The RAN node of Aspect 37, the RSS and two adjacent guard bands can occupy the second bandwidth of the active BWP.

[0240] Aspect 39: The RAN node of Aspect 32, the transmitting the RSS in the active BWP can include transmitting the RSS in a set of contiguous resource blocks (RBs) aligned with a center RB of the active BWP.

[0241] Aspect 40: The RAN node of Aspect 32, the transmitting the RSS in the active BWP can include transmitting the RSS in a set of contiguous resource blocks (RBs) aligned with a preconfigured frequency raster associated with the active BWP.

[0242] Aspect 41: The RAN node of Aspect 32, the first bandwidth of the RSS can be scalable in proportion to the second bandwidth of the active BWP.

[0243] Aspect 42: The RAN node of Aspect 32, the RAN entity can further: transmit at least one of a system information block (SIB) message or a radio resource control (RRC) message identifying at least: a time and frequency resource configuration of the RSS relative to a synchronization signal block (SSB) reference signal, a power offset, and a quasi co-location (QCL) relationship; transmit the RSS on the time and frequency resources preconfigured for one or more UEs; transmit the RSS with increased power relative to a power of the SSB reference signal based on the power offset; transmit one or more RSS beams based on the QCL relationship with the SSB reference signal; and transmit a measurement object and a measurement reporting configuration of the RSS to the UEs.

[0244] Aspect 43: The RAN node of Aspect 42, the power offset can be transmitted via system information (SI) or via a dedicated radio resource control (RRC) signal.

[0245] Aspect 44: The RAN node of Aspect 32, the transmitting the RSS in the active BWP can include transmitting the RSS on one or more RSS beams.

[0246] Aspect 45: The RAN node of Aspect 44, the one or more RSS beams can be transmitted periodically or semi-statically, and the periodicity of the transmissions of the one or more RSS beams can be preconfigured by the RAN node and transmitted via system information (SI) or dedicated radio resource control (RRC) signals.

[0247] Aspect 46: The RAN node of Aspect 44, the one or more RSS beams can include at least a first RSS beam and a second RSS beam.

[0248] Aspect 47: The RAN node of Aspect 46, the generating the RSS for the active BWP of the plurality of BWPs can include generating at least a first RSS sequence and a second RSS sequence, and the transmitting the RSS in the active BWP can include transmitting the first RSS sequence in the first RSS beam and the second RSS sequence in the second RSS beam.

[0249] Aspect 48: The RAN node of Aspect 46, wherein the one or more RSS beams can include at least a first RSS sequence, a second RSS sequence, and a base RSS sequence for the first RSS sequence and the second RSS sequence, wherein the base RSS sequence can include a combination of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

[0250] Aspect 49: The RAN node of Aspect 48, the generating at least the first RSS sequence and the second RSS sequence can include scrambling the base RSS sequence with a first beam- related scrambling sequence associated with the first RSS beam to form a first sequence and scrambling the base RSS sequence with a second beam-related scrambling sequence associated with the second RSS beam to form a second sequence.

[0251] Aspect 50: The RAN node of Aspect 49, the generating at least the first RSS sequence and the second RSS sequence includes initializing a pseudo-random number (PN) sequence generator with a cell identifier (ID) of a cell associated with the RAN node and a first beam index of the first RSS beam to generate the first beam-related scrambling sequence having a sequence bandwidth that is twice the first bandwidth of the RSS, and initializing the PN sequence generator with the cell ID and a second beam index of the second RSS beam to generate the second beam-related scrambling sequence having the sequence bandwidth.

[0252] Aspect 51 : The RAN node of Aspect 49, the generating at least the first RSS sequence and the second RSS sequence can comprise initializing a pseudo-random number (PN) sequence generator with a cell identifier (ID) of a cell associated with the RAN node to generate an extended scrambling sequence comprising the first beam-dependent scrambling sequence and the second beam-dependent scrambling sequence, each having a sequence bandwidth that is twice the first bandwidth of the RSS.

[0253] Aspect 52: The RAN node of Aspect 51, the extended scrambling sequence can comprise a plurality of segments, each segment being associated with a respective RSS beam of a plurality of RSS beams comprising the first beam and the second beam.

[0254] Aspect 53: The RAN node of Aspect 49, the first sequence and the second sequence can each comprise a sequence bandwidth that is twice the first bandwidth of the RSS, and the generating at least the first RSS sequence and the second RSS sequence can comprise modulating the first sequence using quadrature phase shift keying (QPSK) to form a first QPSK sequence corresponding to the first RSS sequence and comprising the first bandwidth, and modulating the second sequence using QPSK to form a second QPSK sequence corresponding to the second RSS sequence and comprising the first bandwidth.

[0255] Aspect 54: The RAN node of Aspect 53, the first QPSK sequence can comprise a first in-phase component comprising even-indexed elements of the first sequence and a first quadrature-phase component comprising odd-indexed elements of the first sequence, and the second QPSK sequence can comprise a second in-phase component comprising even-indexed elements of the first sequence and a second quadrature-phase component comprising odd-indexed elements of the first sequence.

[0256] Aspect 55: The RAN node of Aspect 48, the generating the base RSS sequence for the first RSS sequence and the second RSS sequence can comprise interleaving the PSS with the SSS to produce the combination of the PSS and the SSS, or multiplexing the PSS with the SSS to produce the combination of the PSS and the SSS.

[0257] Aspect 56: The RAN node of aspect 55, the generating the base RSS sequence for the first RSS sequence and the second RSS sequence can comprise applying a first cyclic shift associated with the first RSS beam to the combination of the PSS and the SSS to produce a first base RSS sequence for the first RSS sequence and applying a second cyclic shift associated with the second RSS beam to the combination of the PSS and the SSS to produce a second base RSS sequence for the second RSS sequence.

[0258] Aspect 57: The RAN node of aspect 44, the transmitting the RSS on one or more RSS beams can comprise quasi-co-locating each of the one or more RSS beams with a respective synchronization signal block (SSB) beam.

[0259] Aspect 58: The RAN node of aspect 47, each of the first RSS sequence and the second RSS sequence can comprise a base RSS sequence, and the base RSS sequence can comprise only one of a primary synchronization signal (PSS) or a secondary synchronization signal (SSS).

[0260] Aspect 59: The RAN node of aspect 44, the transmitting the RSS on the one or more RSS beams can comprise applying a binary cover code to each repetition of a transmission of the RSS; generating, based on the binary cover code, the RSS or a conjugate of the RSS for each repetition of the transmission of the RSS; transmitting repetitions of the RSS on a same RSS beam of the one or more RSS beams in an RSS slot of a plurality of RSS slots, each of the repetitions being time division multiplexed in the RSS slot; and transmitting the RSS in at least one slot of the plurality of slots.

[0261] Aspect 60: The RAN node of aspect 59, the transmitting the repetitions of the RSS can comprise transmitting the repetitions of the RSS in consecutive symbols of the RSS slot.

[0262] Aspect 61: The RAN node of aspect 59, the generating the RSS for the active BWP of the plurality of BWPs can comprise applying a binary cover code to each of the repetitions of the RSS; and generating, based on the binary code cover, the RSS or a conjugate of the RSS for each of the repetitions of the RSS.

[0263] Aspect 62: The RAN node of Aspect 59, the transmitting the RSS on the one or more RSS beams can include transmitting the RSS in at least one RSS slot of a plurality of slots.

[0264] Aspect 63: The RAN node of Aspect 62, the at least one RSS slot can be preconfigured for the active BWP.

[0265] Aspect 64: The RAN node of Aspect 62, the RAN entity can further transmit at least one of a system information block (SIB) message or a radio resource control (RRC) message that identifies the at least one RSS slot for the active BWP.

[0266] Aspect 65: The RAN node of Aspect 62, the RSS includes a plurality of RSS, the one or more RSS beams includes a plurality of RSS beams, and the transmitting the RSS in the at least one RSS slot can include transmitting the plurality of RSS across the plurality of RSS beams on the at least one RSS slot, each RSS of the plurality of RSS being transmitted on one RSS beam of the plurality of RSS beams.

[0267] Aspect 66: The RAN node of Aspect 32, the active BWP can not include a synchronization signal block (SSB).

[0268] In one configuration, a user equipment (UE) can include means for receiving a resynchronization signal (RSS) from a radio access network (RAN) node in an active downlink bandwidth part (BWP) of a plurality of BWPs, where a first bandwidth of the RSS is based on a second bandwidth of the active downlink BWP, means for performing a measurement of the RSS, and means for utilizing a communication link with the RAN node based on the measurement.

[0269] In one aspect, the aforementioned means for receiving a resynchronization signal (RSS) from a radio access network (RAN) node in an active downlink bandwidth part (BWP) of a plurality of BWPs (where a first bandwidth of the RSS is based on a second bandwidth of the active downlink BWP), means for performing a measurement of the RSS, and means for utilizing a communication link with the RAN node based on the measurement can be a processor, and various means- functions can be one or more modules (e.g., procedures, programs, functions) of the processor. Figure 14The processor 1404 shown in FIG. 14 can be configured to perform the functions recited by the preceding means. For example, the preceding means for receiving a resynchronization signal (RSS) from a radio access network (RAN) node in an active downlink bandwidth part (BWP) of multiple BWPs, where a first bandwidth of the RSS is based on a second bandwidth of the active downlink BWP, can include Figure 14 the reception circuitry 1442 and the transceiver 1410 in FIG. 14. As another example, the preceding means for performing measurements of the RSS can include the measurement performing circuitry 1444 shown in Figure 14 FIG. 14. As yet another example, the preceding means for utilizing a communication link with the RAN node based on the measurements can include the communication link utilizing circuitry 1446 shown in Figure 14 FIG. 14. In another aspect, the preceding means can be circuitry or any arrangement configured to perform the functions recited by the preceding means.

[0270] In one configuration, a radio access network (RAN) node can include means for generating a resynchronization signal (RSS) for an active bandwidth part (BWP) of multiple BWPs; means for transmitting the RSS to a user equipment (UE) in the active BWP, where a first bandwidth of the RSS is based on a second bandwidth of the BWP; and means for utilizing a communication link with the UE based on the RSS.

[0271] In one aspect, the preceding means for generating a resynchronization signal (RSS) for an active bandwidth part (BWP) of multiple BWPs, means for transmitting the RSS to a user equipment (UE) in the active BWP, where a first bandwidth of the RSS is based on a second bandwidth of the active BWP, and means for utilizing a communication link with the UE based on the RSS can be the processor 1104 shown in Figure 11 FIG. 11 configured to perform the functions recited by the preceding means. For example, the preceding means for generating a resynchronization signal (RSS) for an active bandwidth part (BWP) of multiple BWPs can include the reference signal generating circuitry 1142 shown in Figure 11 FIG. 11. As another example, the preceding means for transmitting the RSS to a user equipment (UE) in the active BWP, where a first bandwidth of the RSS is based on a second bandwidth of the active BWP, can include the transmission circuitry 1144 and the transceiver 1110 shown in Figure 11 FIG. 11. As another example, the preceding means for utilizing a communication link with the UE based on the RSS can include the communication link utilizing circuitry 1146 shown in Figure 11 FIG. 11. In another aspect, the preceding means can be circuitry or any arrangement configured to perform the functions recited by the preceding means.

[0272] Several aspects of a wireless communication network have been presented with reference to the example implementations. As those skilled in the art will readily appreciate, various aspects described throughout this disclosure can be extended to other telecommunication systems, network architectures and communication standards.

[0273] By way of example, various aspects can be implemented within other systems defined by 3GPP such as Long-Term Evolution (LTE), Evolved Packet System (EPS), the Universal Mobile Telecommunication System (UMTS), and / or the Global System for Mobile (GSM). Various aspects can also be implemented within systems defined by the 3rd Generation Partnership Project 2 (3GPP2), such as CDMA2000 and / or Evolution-Data Optimized (EV-DO). Other examples can be implemented within systems employing IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Ultra-WideBand (UWB), Bluetooth, and / or other suitable systems. The actual telecommunication standard, network architecture, and / or communication standard employed will depend on the specific application and the overall design constraints imposed on the system.

[0274] In the present disclosure, the word "exemplary" is used to mean "serving as an example, instance, or illustration." Any implementation or aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects of the disclosure. Likewise, the term "aspects" does not require that all aspects of the disclosure include the discussed feature, advantage or mode of operation. The term "coupled" is used herein to refer to the direct or indirect coupling between two objects. For example, if object A physically touches object B, and object B touches object C, then objects A and C can still be considered coupled to one another — even if they do not directly physically touch each other — as through the intermediary of object B. For instance, a first object can be coupled to a second object even if the first object is never directly physically in contact with the second object. The terms "circuit" and "circuitry" are used broadly, and intended to include both hardware implementations of circuits (in which the circuits are implemented in, for example, analog circuits, digital circuits, mixed mode circuits, etc.) as well as software implementations of circuits (in which the circuits are implemented using, for example, object-oriented software programming or other software programming frameworks, paradigms, and / or techniques). The term "circuitry" is also intended to include, for example: discrete electronic components, such as resistors, capacitors, inductors, transmit / receive elements, etc; integrated electronic components, such as application- specific integrated-circuits (ASICs), field-programmable gate arrays (FPGAs), etc; and / or combinations of hardware and software components.

[0275] One or more of the components, steps, features and / or functions illustrated in Figures 1-16 may be rearranged and / or combined into a single component, step, feature or function or embodied in several components, steps, or functions. Additional stages, components, steps, and / or functions can also be added or made optional by the skilled artisan depending on the specifics of the implementation. Further, non-essential Figures 1-16The apparatuses, devices, and / or components illustrated in the figures can be configured to perform one or more of the methods, features, or steps described herein. The novel algorithms described herein can also be efficiently implemented in software and / or embedded in hardware.

[0276] It is understood that the specific order or hierarchy of steps in the methods disclosed herein are illustrations. It is understood that the specific order or hierarchy of steps in the methods can be combined, re-ordered, removed or modified, and other techniques performed or equivalent steps performed in other sequences, based on implementation dependent desires. The methods of the appended claims are intended to encompass any such steps performed in any such sequences, to the extent that the steps are not mutually inconsistent or mutually exclusive.

[0277] The preceding description is to be understood as illustrative only. Numerous modifications and alterations, being readily perceptible to those skilled in the art, can be made to the methods described herein without departing from the scope thereof, and the generic principles defined herein can be applied to other aspects. Accordingly, the descriptions are not intended to limit the aspects to the forms disclosed herein, but are meant to include all future variations that fall within the scope of the claims. Unless otherwise expressly stated, references to a step or element performing an action or set of actions can include performing some or all of the actions associated with that step or element, and / or can include omitting some or all of the actions associated with that step or element. Unless otherwise expressly stated, the use of the term "some" means one or more. The use of the term "at least" with respect to a property or feature can mean that the property or feature is present, or has a value greater than zero. The term "set" can mean one or more. The term "plurality" can mean two or more. The term "group" can mean one or more. The term "one or more of" can mean one or more. The term "at least one of" can mean one or more. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group. The term "at least one of a group of items" can mean any single one of the items in the group, or any combination of two or more of the items in the group.

Claims

1. A method for performing wireless communication at a user equipment (UE) in a wireless communication network, the method comprising: In the downlink (DL) bandwidth portion (BWP) of the radio access network (RAN) node where no synchronization signal block (SSB) is transmitted, a resynchronization signal (RSS) is received from the RAN node, the RSS having a first bandwidth, the first bandwidth being scaled according to a second bandwidth of the DL BWP relative to another DL BWP; Perform a measurement on the RSS; as well as The communication link with the RAN node is utilized based on the measurement.

2. The method according to claim 1, wherein, Utilizing the communication link with the RAN node based on the measurement includes one or more of the following: Receive the measurement object and measurement report configuration for the RSS; Send the measurement report obtained from the measurement to the RAN node; The tracking loop of the UE is adjusted based on the measurements. or The measurement is used to update one or more receive or transmit parameters of the UE.

3. The method according to claim 1, wherein, After performing the measurement of the RSS, the method further includes: Based on the measurement object and measurement report configuration, the measurement of the RSS is used for radio resource management (RRM) or radio link monitoring under different radio resource control (RRC) states of the UE; and The measurement of the RSS is combined with the detection of the UE's paging signal or wake-up signal.

4. The method according to claim 1, wherein, Receiving the RSS in the downlink BWP includes: Receive the RSS in a set of contiguous resource blocks (RBs) configured by the RAN node; and The RSS is received on the set of symbols within the time slot set configured by the RAN node.

5. The method of claim 1, further comprising at least one of the following: Receive at least one of a System Information Block (SIB) message or a Radio Resource Control (RRC) message identifying the power offset of the RSS relative to the Synchronization Signal Block (SSB) reference signal, and The RSS is received using the increased power relative to the SSB reference signal based on the power offset; or Receive at least one of a SIB message or an RRC message indicating the time and frequency configuration of the RSS, and The RSS is received based on the time and frequency configuration indicated in the SIB message or the RRC message.

6. The method according to claim 1, wherein, Receiving the RSS in the downlink BWP includes: The RSS is received periodically or semi-statically on one or more RSS beams in at least one of a plurality of RSS time slots, wherein the period and time offset of each of the plurality of RSS time slots, associated with the reception of each of the one or more RSS beams, are pre-configured by the RAN node and received via system information (SI) or dedicated RRC signals.

7. The method according to claim 6, wherein: The one or more RSS beams include at least a first RSS beam and a second RSS beam. The RSS includes at least a first RSS sequence and a second RSS sequence. The first RSS sequence was received in the first RSS beam, and The second RSS sequence is received in the second RSS beam.

8. The method according to claim 7, wherein: Each of the first and second RSS sequences includes a base RSS sequence, and The basic RSS sequence is a function of the cell identifier (ID) of the RAN node and is based on the primary synchronization signal (PSS) and secondary synchronization signal (SSS).

9. The method according to claim 8, wherein: The first RSS sequence includes a first sequence comprising the basic RSS sequence scrambled using a first beam-correlated scrambling sequence associated with the first RSS beam, and The second RSS sequence includes a second sequence comprising the basic RSS sequence scrambled using a second beam-related scrambling sequence associated with the second RSS beam.

10. The method according to claim 8, wherein: The basic RSS sequence includes the PSS interleaved with the SSS; The basic RSS sequence comprises a weighted combination of the PSS and the SSS; or The basic RSS sequence includes the PSS multiplexed with the SSS.

11. The method of claim 10, wherein: The basic RSS sequence includes a first basic RSS sequence associated with the first RSS sequence and a second basic RSS sequence associated with the second RSS sequence; The first basic RSS sequence includes a first cyclic shift of the combination of the PSS and the SSS; The second basic RSS sequence includes a second cyclic shift of the combination of the PSS and the SSS; The first cyclic shift is associated with the first RSS beam; and The second cyclic shift is associated with the second RSS beam.

12. The method according to claim 6, wherein, Each of the one or more RSS beams is quasi-co-located with the corresponding Synchronization Signal Block (SSB) beam or Channel State Information Reference Signal (CSI-RS) beam.

13. The method according to claim 6, wherein, Receiving the RSS on one or more RSS beams includes: A repetition of the RSS is received on the same RSS beam in one or more RSS beams within a plurality of RSS time slots, wherein each repetition is time-division multiplexed in the RSS time slot, and wherein the received repetition of the RSS is received in consecutive symbols of the RSS time slot.

14. The method according to claim 13, wherein, Each repetition in the RSS comprises either the RSS based on a binary overlay code or a conjugate of the RSS.

15. The method according to claim 1, wherein: The RSS includes multiple RSSs, which are orthogonal or quasi-orthogonal and are multiplexed in the time domain, frequency domain, code domain, or spatial domain. The plurality of RSSs includes a plurality of RSS beams; and Receiving the plurality of RSSs in the downlink BWP includes: The plurality of RSSs are received across the plurality of RSS beams in at least one RSS time slot, wherein each of the plurality of RSSs is received on one of the plurality of RSS beams.

16. The method according to claim 1, further comprising: Identify another active BWP among multiple BWPs; The switch from the active BWP to the other active BWP is based on dynamic signaling, semi-static time configuration, or RRC signaling. as well as Receive another RSS from the other active BWP.

17. A method for conducting wireless communication at a radio access network (RAN) node in a wireless communication network, the method comprising: In the downlink (DL) bandwidth portion (BWP) of the radio access network (RAN) node within it, where synchronization signal blocks (SSBs) are not transmitted, a resynchronization signal (RSS) is transmitted to the user equipment (UE), the RSS having a first bandwidth, the first bandwidth being scaled according to a second bandwidth of the DL BWP relative to another DL BWP; as well as Utilizing the communication link with the UE based on the RSS, wherein utilizing the communication link with the UE based on the RSS includes at least one of the following: Receive a measurement report from the UE based on the measurement of the RSS. Receive from the UE an indication regarding adjustments to the tracking loop based on the measurement of the RSS, or The UE receives an indication of an update to one or more receive or transmit parameters based on the measurement of the RSS.

18. The method of claim 17, further comprising: Send at least one of the following System Information Block (SIB) messages or Radio Resource Control (RRC) messages: the time and frequency resource configuration, power offset, and quasi-co-address (QCL) relationship of the RSS relative to the Synchronization Signal Block (SSB) reference signal; The RSS is transmitted on the time and frequency resources pre-configured for one or more UEs; The RSS is transmitted using power increased relative to the SSB reference signal based on the power offset; One or more RSS beams are transmitted based on the QCL relationship with the SSB reference signal; as well as Send the RSS measurement object and measurement report configuration to the UE.

19. The method according to claim 18, wherein, The one or more RSS beams include at least a first RSS sequence, a second RSS sequence, and a basic RSS sequence for the first RSS sequence and the second RSS sequence, wherein the basic RSS sequence includes a combination of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

20. The method of claim 19, wherein: Generating at least the first RSS sequence and the second RSS sequence includes: The basic RSS sequence is scrambled using a first beam-correlated scrambling sequence associated with the first RSS beam to form a first sequence, and The basic RSS sequence is scrambled using a second beam-related scrambling sequence associated with the second RSS beam to form a second sequence.

21. The method of claim 20, wherein: The generation of at least the first RSS sequence and the second RSS sequence includes: A pseudo-random number (PN) sequence generator is initialized using the cell identifier (ID) of the cell associated with the RAN node and the first beam index of the first RSS beam to generate a first beam-related scrambling sequence with a sequence bandwidth that is twice the first bandwidth of the RSS; and The PN sequence generator is initialized using the cell ID and the second beam index of the second RSS beam to generate the second beam-related scrambling sequence with the sequence bandwidth.

22. The method according to claim 20, wherein, The generation of at least the first RSS sequence and the second RSS sequence includes: The pseudo-random number (PN) sequence generator is initialized using the cell identifier (ID) of the cell associated with the RAN node to generate an extended scrambling sequence including the first beam-related scrambling sequence and the second beam-related scrambling sequence, each having a sequence bandwidth that is twice the first bandwidth of the RSS.

23. The method according to claim 22, wherein, The extended scrambling sequence comprises multiple segments, each segment being associated with a corresponding RSS beam among a plurality of RSS beams including the first RSS beam and the second RSS beam.

24. The method of claim 20, wherein: The first sequence and the second sequence each include a sequence bandwidth that is twice the first bandwidth of the RSS, and generating at least the first RSS sequence and the second RSS sequence includes: The first sequence is modulated using quadrature phase shift keying to form a first QPSK sequence corresponding to the first RSS sequence and including the first bandwidth; and The second sequence is modulated using QPSK to form a second QPSK sequence that corresponds to the second RSS sequence and includes the first bandwidth.

25. The method of claim 24, wherein: The first QPSK sequence includes a first in-phase component and a first quadrature-phase component. The first in-phase component includes even-indexed elements of the first sequence, and the first quadrature-phase component includes odd-indexed elements of the first sequence. The second QPSK sequence includes a second in-phase component and a second quadrature phase component. The second in-phase component includes even-indexed elements of the first sequence, and the second quadrature phase component includes odd-indexed elements of the first sequence.

26. The method according to claim 19, wherein: Generating the base RSS sequence for the first RSS sequence and the second RSS sequence includes: The PSS and the SSS are interleaved to produce the combination of the PSS and the SSS, or The PSS and the SSS are multiplexed to produce the combination of the PSS and the SSS.

27. The method of claim 26, wherein: Generating the base RSS sequence for the first RSS sequence and the second RSS sequence includes: A first cyclic shift associated with the first RSS beam is applied to the combination of the PSS and the SSS to generate a first basic RSS sequence for the first RSS sequence, and A second cyclic shift associated with the second RSS beam is applied to the combination of the PSS and the SSS to generate a second basic RSS sequence for the second RSS sequence.

28. The method according to claim 18, wherein, Transmitting the RSS on one or more RSS beams includes: Apply binary overlay code to each repetition of the RSS transmission; Based on the binary overlay code, the RSS or the conjugate of the RSS is generated for each repetition of the transmission of the RSS; Repeats of the RSS are transmitted on the same RSS beam in one or more RSS beams within multiple RSS time slots, each of the repeats being time-division multiplexed within the RSS time slot; and The RSS is transmitted in at least one of the multiple time slots.

29. A user equipment (UE) in a wireless communication network, comprising: Wireless transceiver; Memory; as well as A processor communicatively coupled to the wireless transceiver and the memory, wherein the processor and the memory are configured to: In the downlink (DL) bandwidth portion (BWP) of the radio access network (RAN) node where no synchronization signal block (SSB) is transmitted, a resynchronization signal (RSS) is received from the RAN node, the RSS having a first bandwidth, the first bandwidth being scaled according to a second bandwidth of the DL BWP relative to another DL BWP; Perform a measurement of the RSS; and The communication link with the RAN node is utilized based on the measurement.

30. The UE according to claim 29, wherein, In order to utilize the communication link with the RAN node based on the measurement, the processor and the memory are configured to perform one or more of the following: Receive the measurement object and measurement report configuration for the RSS; Send the measurement report obtained from the measurement to the RAN node; The tracking loop of the UE is adjusted based on the measurements. or The measurement is used to update one or more receive or transmit parameters of the UE.

31. The UE according to claim 29, wherein, After performing the measurement of the RSS, the processor and the memory are further configured to: Based on the measurement object and measurement report configuration, the measurement of the RSS is used for radio resource management (RRM) or radio link monitoring in different radio resource control (RRC) states of the UE. as well as The measurement of the RSS is combined with the detection of the UE's paging signal or wake-up signal.

32. The UE according to claim 29, wherein, In order to receive the RSS in the downlink BWP, the processor and the memory are configured as follows: The RSS is received in a set of contiguous resource blocks (RBs) configured by the RAN node; as well as The RSS is received on the set of symbols within the time slot set configured by the RAN node.

33. The UE of claim 29, wherein the processor and the memory are further configured to perform at least one of the following: Receive at least one of a System Information Block (SIB) message or a Radio Resource Control (RRC) message identifying the power offset of the RSS relative to the Synchronization Signal Block (SSB) reference signal, and The RSS is received using the increased power relative to the SSB reference signal based on the power offset; or Receive at least one of a SIB message or an RRC message indicating the time and frequency configuration of the RSS, and The RSS is received based on the time and frequency configuration indicated in the SIB message or the RRC message.

34. The UE according to claim 29, wherein, In order to receive the RSS in the downlink BWP, the processor and the memory are configured as follows: The RSS is received periodically or semi-statically on one or more RSS beams in at least one of a plurality of RSS time slots, wherein the period and time offset of each of the plurality of RSS time slots, associated with the reception of each of the one or more RSS beams, are pre-configured by the RAN node and received via system information (SI) or dedicated RRC signals.

35. The UE according to claim 34, wherein: The one or more RSS beams include at least a first RSS beam and a second RSS beam. The RSS includes at least a first RSS sequence and a second RSS sequence. The first RSS sequence was received in the first RSS beam, and The second RSS sequence is received in the second RSS beam.

36. The UE according to claim 35, wherein: Each of the first and second RSS sequences includes a base RSS sequence, and The basic RSS sequence is a function of the cell identifier (ID) of the RAN node and is based on the primary synchronization signal (PSS) and secondary synchronization signal (SSS).

37. The UE according to claim 36, wherein: The first RSS sequence includes a first sequence comprising the basic RSS sequence scrambled using a first beam-correlated scrambling sequence associated with the first RSS beam, and The second RSS sequence includes a second sequence comprising the basic RSS sequence scrambled using a second beam-related scrambling sequence associated with the second RSS beam.

38. The UE according to claim 36, wherein: The basic RSS sequence includes the PSS interleaved with the SSS; The basic RSS sequence comprises a weighted combination of the PSS and the SSS; or The basic RSS sequence includes the PSS multiplexed with the SSS.

39. The UE according to claim 38, wherein: The basic RSS sequence includes a first basic RSS sequence associated with the first RSS sequence and a second basic RSS sequence associated with the second RSS sequence; The first basic RSS sequence includes a first cyclic shift of the combination of the PSS and the SSS; The second basic RSS sequence includes a second cyclic shift of the combination of the PSS and the SSS; The first cyclic shift is associated with the first RSS beam; and The second cyclic shift is associated with the second RSS beam.

40. The UE according to claim 34, wherein, Each of the one or more RSS beams is quasi-co-located with the corresponding Synchronization Signal Block (SSB) beam or Channel State Information Reference Signal (CSI-RS) beam.

41. The UE according to claim 34, wherein, In order to receive the RSS on the one or more RSS beams, the processor and the memory are configured to: A repetition of the RSS is received on the same RSS beam in one or more RSS beams within a plurality of RSS time slots, wherein each repetition is time-division multiplexed in the RSS time slot, and wherein the received repetition of the RSS is received in consecutive symbols of the RSS time slot.

42. The UE according to claim 41, wherein, Each repetition in the RSS comprises either the RSS based on a binary overlay code or a conjugate of the RSS.

43. The UE according to claim 29, wherein: The RSS includes multiple RSSs, which are orthogonal or quasi-orthogonal and are multiplexed in the time domain, frequency domain, code domain, or spatial domain. The plurality of RSSs includes a plurality of RSS beams; and Receiving the plurality of RSSs in the downlink BWP includes: The plurality of RSSs are received across the plurality of RSS beams in at least one RSS time slot, wherein each of the plurality of RSSs is received on one of the plurality of RSS beams.

44. The UE of claim 29, wherein the processor and the memory are further configured to: Identify another active BWP among multiple BWPs; Switching from the active BWP to the other active BWP based on dynamic signaling, semi-static time configuration, or RRC signaling; and Receive another RSS from the other active BWP.

45. A radio access network (RAN) node in a wireless communication system, comprising: Wireless transceiver; Memory; as well as A processor communicatively coupled to the wireless transceiver and the memory, wherein the processor and the memory are configured to: In the downlink (DL) bandwidth portion (BWP) of the radio access network (RAN) node within it, where synchronization signal blocks (SSBs) are not transmitted, a resynchronization signal (RSS) is transmitted to the user equipment (UE). This RSS has a first bandwidth, which is scaled according to a second bandwidth of the DL BWP relative to another DL BWP. Utilizing the communication link with the UE based on the RSS, wherein utilizing the communication link with the UE based on the RSS includes at least one of the following: Receive a measurement report from the UE based on the measurement of the RSS. Receive from the UE an indication regarding adjustments to the tracking loop based on the measurement of the RSS, or The UE receives an indication of an update to one or more receive or transmit parameters based on the measurement of the RSS.

46. ​​The RAN node of claim 45, wherein the processor and the memory are further configured to: Send at least one of the following System Information Block (SIB) messages or Radio Resource Control (RRC) messages: the time and frequency resource configuration, power offset, and quasi-co-address (QCL) relationship of the RSS relative to the Synchronization Signal Block (SSB) reference signal; The RSS is transmitted on the time and frequency resources pre-configured for one or more UEs; The RSS is transmitted using power increased relative to the SSB reference signal based on the power offset; One or more RSS beams are transmitted based on the QCL relationship with the SSB reference signal; as well as Send the RSS measurement object and measurement report configuration to the UE.

47. The RAN node according to claim 46, wherein, The one or more RSS beams include at least a first RSS sequence, a second RSS sequence, and a basic RSS sequence for the first RSS sequence and the second RSS sequence, wherein the basic RSS sequence includes a combination of a primary synchronization signal (PSS) and a secondary synchronization signal (SSS).

48. The RAN node according to claim 47, wherein, In order to generate at least the first RSS sequence and the second RSS sequence, the processor and the memory are configured as follows: The basic RSS sequence is scrambled using a first beam-correlated scrambling sequence associated with the first RSS beam to form a first sequence, and The basic RSS sequence is scrambled using a second beam-related scrambling sequence associated with the second RSS beam to form a second sequence.

49. The RAN node according to claim 48, wherein, In order to generate at least the first RSS sequence and the second RSS sequence, the processor and the memory are configured as follows: The pseudo-random number (PN) sequence generator is initialized using the cell identifier (ID) of the cell associated with the RAN node and the first beam index of the first RSS beam to generate the first beam-related scrambling sequence having a sequence bandwidth that is twice the first bandwidth of the RSS. as well as The PN sequence generator is initialized using the cell ID and the second beam index of the second RSS beam to generate the second beam-related scrambling sequence with the sequence bandwidth.

50. The RAN node according to claim 48, wherein, In order to generate at least the first RSS sequence and the second RSS sequence, the processor and the memory are configured as follows: The pseudo-random number (PN) sequence generator is initialized using the cell identifier (ID) of the cell associated with the RAN node to generate an extended scrambling sequence including the first beam-related scrambling sequence and the second beam-related scrambling sequence, each having a sequence bandwidth that is twice the first bandwidth of the RSS.

51. The RAN node according to claim 50, wherein, The extended scrambling sequence comprises multiple segments, each segment being associated with a corresponding RSS beam among a plurality of RSS beams including the first RSS beam and the second RSS beam.

52. The RAN node according to claim 48, wherein: The first sequence and the second sequence each include a sequence bandwidth that is twice the first bandwidth of the RSS, and in order to generate at least the first RSS sequence and the second RSS sequence, the processor and the memory are configured as follows: The first sequence is modulated using quadrature phase shift keying to form a first QPSK sequence that corresponds to the first RSS sequence and includes the first bandwidth; as well as The second sequence is modulated using QPSK to form a second QPSK sequence that corresponds to the second RSS sequence and includes the first bandwidth.

53. The RAN node according to claim 52, wherein: The first QPSK sequence includes a first in-phase component and a first quadrature-phase component. The first in-phase component includes even-indexed elements of the first sequence, and the first quadrature-phase component includes odd-indexed elements of the first sequence. The second QPSK sequence includes a second in-phase component and a second quadrature phase component. The second in-phase component includes even-indexed elements of the first sequence, and the second quadrature phase component includes odd-indexed elements of the first sequence.

54. The RAN node according to claim 47, wherein, To generate the base RSS sequence for the first RSS sequence and the second RSS sequence, the processor and the memory are configured as follows: The PSS and the SSS are interleaved to produce the combination of the PSS and the SSS, or The PSS and the SSS are multiplexed to produce the combination of the PSS and the SSS.

55. The RAN node according to claim 54, wherein, To generate the base RSS sequence for the first RSS sequence and the second RSS sequence, the processor and the memory are configured as follows: A first cyclic shift associated with the first RSS beam is applied to the combination of the PSS and the SSS to generate a first basic RSS sequence for the first RSS sequence, and A second cyclic shift associated with the second RSS beam is applied to the combination of the PSS and the SSS to generate a second basic RSS sequence for the second RSS sequence.

56. The RAN node according to claim 46, wherein, In order to transmit the RSS on the one or more RSS beams, the processor and the memory are configured to: Apply binary overlay code to each repetition of the RSS transmission; Based on the binary overlay code, the RSS or the conjugate of the RSS is generated for each repetition of the transmission of the RSS; In multiple RSS time slots, repeats of the RSS are transmitted on the same RSS beam in one or more RSS beams, each of the repeats being time-division multiplexed in the RSS time slot; as well as The RSS is transmitted in at least one of the multiple time slots.

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