Reference synchronization signal block for user equipment mobility

Abstract

Various aspects of this disclosure generally relate to wireless communications. In some aspects, user equipment (UE) can determine whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for a serving cell are the same as the center frequency and SCS of the reference SSB for a target cell, respectively, for handover between a serving cell and a target cell. The UE may initiate a handover from a serving cell to a target cell using one or more in-frequency measurement or handover conditions, or otherwise using one or more inter-frequency measurement or handover conditions, at least in part on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively. Numerous other aspects are described.

Description

[Technical Field]

[0001] (Cross-reference of related applications) This patent application claims priority to Indian Patent Application No. 202341010797, “REFERENCE SYNCHRONIZATION SIGNAL BLOCK FOR USER EQUIPMENT MOBILITY,” filed on 17 February 2023, which is assigned to the assignee of this application. The disclosures of the prior application are deemed to be part of this patent application and are incorporated into this patent application by reference.

[0002] The aspects of this disclosure generally relate to wireless communications and to techniques and apparatus for reference synchronization signal blocks for user equipment mobility. [Background technology]

[0003] Wireless communication systems are widely deployed to provide a variety of telecommunications services, including telephone, video, data, messaging, and broadcast. Typical wireless communication systems can employ multiple access technologies that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power). Examples of such multiple access technologies include Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and Long Term Evolution (LTE). LTE / LTE-Advanced is a set of extensions to the Universal Mobile Telecommunications System (UMTS) mobile standard, published by the Third Generation Partnership Project (3GPP®).

[0004] A wireless network may include one or more network nodes that support communication between user equipment (UE) or wireless communication devices such as multiple UEs. UEs may communicate with network nodes via downlink and uplink communications. "Downlink" (or "DL") refers to the communication link from a network node to a UE, and "uplink" (or "UL") refers to the communication link from a UE to a network node. Some wireless networks may support inter-device communication via local links (e.g., sidelink (SL), wireless local area network (WLAN) links, and / or wireless personal area network (WPAN) links).

[0005] The multiple access technologies described above have been adopted in various telecommunications standards to provide a common protocol that enables various UEs to communicate at the city, national, regional, and / or global levels. New Radio (NR), sometimes referred to as 5G, is a set of extensions to the LTE mobile standard published by 3GPP. NR is designed to better support mobile broadband internet access by improving spectral efficiency, lowering costs, enhancing services, utilizing new spectra, and better integrating with other open standards by using orthogonal frequency division multiplexing (OFDM) with cyclic prefixes (CP) on the downlink and CP-OFDM and / or single-carrier frequency division multiplexing (SC-FDM) (also known as discrete Fourier transform spread OFDM, DFT-s-OFDM) on the uplink, as well as by supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation. As the demand for mobile broadband access continues to grow, further improvements in LTE, NR, and other radio access technologies remain useful. [Overview of the Initiative]

[0006] Some embodiments described herein relate to methods of wireless communication performed by user equipment (UE). The method may include identifying whether the center frequency and subcarrier spacing (SCS) of a reference synchronization signal block (SSB) for a serving cell are the same as the center frequency and SCS of a reference SSB for a target cell, respectively, for handover between a serving cell and a target cell. The method may include initiating a handover from a serving cell to a target cell using one or more in-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, or using one or more inter-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the target cell, respectively.

[0007] Some embodiments described herein relate to methods of wireless communication performed by network nodes. The method may include transmitting configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for a target cell. The method may also include transmitting instructions for performing a handover from a serving cell to a target cell, the handover being performed using one or more in-same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the target cell, respectively, or using one or more different-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the target cell, respectively.

[0008] Some aspects described herein relate to methods of wireless communication implemented by a UE. The method may include identifying whether the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, respectively, for radio resource control (RRC) re-establishment. The method may include initiating RRC re-establishment using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are different from the center frequency and SCS of a reference SSB for an adjacent cell, respectively.

[0009] Some embodiments described herein relate to methods of wireless communication performed by network nodes. The method may include transmitting configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for an adjacent cell. The method may also include transmitting instructions for performing RRC re-establishment, which is performed using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively, or using one or more cross-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively.

[0010] Some embodiments described herein relate to a UE for wireless communications. The user device may include memory, one or more processors coupled to the memory, and instructions stored in the memory and executable by one or more processors. The instructions may be executable by one or more processors to cause the user device to identify whether the center frequency and SCS of the reference SSB for a serving cell are the same as the center frequency and SCS of the reference SSB for a target cell, respectively, for handover between a serving cell and a target cell. Instructions may be executable by one or more processors to cause user equipment to initiate a handover from a serving cell to a target cell using one or more in-same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, or using one or more inter-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the target cell, respectively.

[0011] Some embodiments described herein relate to network nodes for wireless communications. A network node may include memory, one or more processors coupled to the memory, and instructions stored in the memory and executable by one or more processors. Instructions may be executable by one or more processors to cause the network node to transmit configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for a target cell. Instructions may also be executable by one or more processors to cause the network node to transmit instructions for performing a handover from a serving cell to a target cell, the handover being performed using one or more in-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the target cell, respectively, or using one or more different-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the target cell, respectively.

[0012] Some embodiments described herein relate to a UE for wireless communications. User equipment may include memory, one or more processors coupled to the memory, and instructions stored in memory and executable by one or more processors. Instructions may be executable by one or more processors to cause the user equipment to identify whether the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, respectively, for RRC re-establishment. Instructions may be executable by one or more processors to cause the user equipment to initiate RRC re-establishment using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of a reference SSB for a serving cell are different from the center frequency and SCS of a reference SSB for an adjacent cell, respectively.

[0013] Some embodiments described herein relate to network nodes for wireless communications. A network node may include memory, one or more processors coupled to the memory, and instructions stored in memory and executable by one or more processors. Instructions may be executable by one or more processors to cause the network node to transmit configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for an adjacent cell. Instructions may also be executable by one or more processors to cause the network node to transmit instructions for performing RRC re-establishment, which is performed using one or more in-same-frequency measurements, at least on the basis that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively, or using one or more cross-frequency measurements, at least on the basis that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively.

[0014] Some embodiments described herein relate to a non-temporary computer-readable medium for storing one or more instructions for wireless communication by a UE. One or more instructions, when executed by one or more processors of the UE, can cause the UE to identify whether the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, for handover between a serving cell and a target cell. One or more instructions, when executed by one or more processors of the UE, can cause the UE to initiate a handover from a serving cell to a target cell using one or more same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, or using one or more different-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the target cell, respectively.

[0015] Some embodiments described herein relate to a non-temporary computer-readable medium for storing one or more instructions for wireless communication by network nodes. One or more instructions, when executed by one or more processors of the network nodes, may cause the network nodes to transmit configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for a target cell. One or more instructions, when executed by one or more processors of the network nodes, may cause the network nodes to transmit instructions for performing a handover from a serving cell to a target cell, the handover being performed using one or more in-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the target cell, respectively, or using one or more different-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the target cell, respectively.

[0016] Some aspects described in this specification relate to a non-transitory computer-readable medium storing one or more instructions for wireless communication by a UE. When executed by one or more processors of the UE, the one or more instructions may cause the UE to identify whether the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, respectively, for RRC reestablishment. When executed by one or more processors of the UE, the one or more instructions may cause the UE to start RRC reestablishment using one or more same-frequency measurements, at least in part based on the center frequency and SCS of a reference SSB for a serving cell being the same as the center frequency and SCS of a reference SSB for an adjacent cell, respectively, or using one or more inter-frequency measurements, at least in part based on the center frequency and SCS of a reference SSB for a serving cell being different from the center frequency and SCS of a reference SSB for an adjacent cell, respectively.

[0017] Some embodiments described herein relate to a non-temporary computer-readable medium for storing one or more instructions for wireless communication by network nodes. One or more instructions, when executed by one or more processors of the network nodes, may cause the network nodes to transmit configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for an adjacent cell. One or more instructions, when executed by one or more processors of the network nodes, may cause the network nodes to transmit instructions for performing RRC re-establishment, which is performed using one or more in-same-frequency measurements, at least on the basis that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively, or using one or more inter-frequency measurements, at least on the basis that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively.

[0018] Some embodiments described herein relate to apparatus for wireless communications. The apparatus may include means for determining whether the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for a target cell, respectively, for handover between a serving cell and a target cell. The apparatus may include means for initiating a handover from a serving cell to a target cell using one or more in-same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are the same as the center frequency and SCS of the reference SSB for a target cell, respectively, or using one or more inter-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are different from the center frequency and SCS of the reference SSB for a target cell, respectively.

[0019] Some aspects described in this specification relate to an apparatus for wireless communication. The apparatus may include means for transmitting configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for a target cell. The apparatus may also include means for transmitting an instruction to perform a handover from a serving cell to a target cell, where the handover is at least partially based on the center frequency and SCS of a selected reference SSB for the serving cell being the same as the center frequency and SCS of a selected reference SSB for the target cell, respectively, and using one or more same-frequency measurements or handover conditions, or the handover is at least partially based on the center frequency and SCS of a selected reference SSB for the serving cell being different from the center frequency and SCS of a selected reference SSB for the target cell, respectively, and using one or more different-frequency measurements or handover conditions.

[0020] Some aspects described in this specification relate to an apparatus for wireless communication. The apparatus may include means for identifying whether the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, respectively, for RRC re-establishment. The apparatus may include means for starting RRC re-establishment using one or more same-frequency measurements at least partially based on the center frequency and SCS of a reference SSB for the serving cell being the same as the center frequency and SCS of a reference SSB for the adjacent cell, respectively, or using one or more different-frequency measurements at least partially based on the center frequency and SCS of a reference SSB for the serving cell being different from the center frequency and SCS of a reference SSB for the adjacent cell, respectively.

[0021] Some embodiments described herein relate to apparatus for wireless communications. The apparatus may include means for transmitting configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for an adjacent cell. The apparatus may also include means for transmitting instructions for performing RRC re-establishment, which is performed using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively.

[0022] Embodiments are generally described substantially herein with reference to the drawings and include methods, apparatus, systems, computer program products, non-temporary computer-readable media, user equipment, base stations, network entities, network nodes, wireless communication devices, and / or processing systems, as shown by the drawings.

[0023] The above provides a fairly broad overview of the features and technical advantages of the embodiments of this disclosure so that the following “Modes for Carrying Out the Invention” may be better understood. Additional features and advantages are described below. The concepts and specific embodiments disclosed may be readily used as a basis for modifying or designing other structures to accomplish the same objectives of this disclosure. Such equivalent structures shall not deviate from the scope of the appended claims. The characteristics of the concepts disclosed herein, both their configuration and method of operation, will be better understood, along with the relevant advantages, by considering the following description in relation to the accompanying figures. Each figure is provided for illustrative and explanatory purposes and is not provided to define any limitation of the claims.

[0024] While various embodiments are described herein by example to several embodiments, those skilled in the art will understand that such embodiments can be implemented in many different configurations and scenarios. The technologies described herein can be implemented using a variety of platform types, devices, systems, shapes, sizes, and / or packaging configurations. For example, some embodiments can be implemented via integrated chip embodiments or other non-modular component-based devices (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, and / or artificial intelligence devices). The embodiments can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, and / or system-level components. Devices incorporating the described embodiments and features may include additional components and features for implementing and practicing the claimed and described embodiments. For example, the transmission and reception of wireless signals may include one or more components (e.g., hardware components including antennas, radio frequency (RF) chains, power amplifiers, modulators, buffers, processors, interleavers, adders, and / or analog adders) for analog and digital purposes. The embodiments described herein are intended to be applicable to a wide variety of devices, components, systems, distributed configurations, and / or end-user devices of various sizes, shapes, and structures.

[0025] A more detailed explanation of the features of this disclosure listed above can be obtained by referring to the embodiments partially shown in the accompanying drawings, which allow for a more detailed understanding of the features of this disclosure listed above. However, it should be noted that the accompanying drawings only illustrate certain typical embodiments of this disclosure, and therefore the explanation may be incorporated into other equally effective embodiments and should not be considered to limit the scope of this disclosure. The same reference numerals in different drawings may identify the same or similar elements. [Brief explanation of the drawing]

[0026] [Figure 1] This figure shows one embodiment of a wireless network according to the present disclosure. [Figure 2] This figure shows one embodiment of a network node that communicates with user equipment (UE) within a wireless network, as disclosed herein. [Figure 3] This figure shows an exemplary non-aggregated base station architecture as described herein. [Figure 4] This figure shows one embodiment of the bandwidth portion and synchronization signal block configuration according to the present disclosure. [Figure 5] This figure shows one embodiment of identifying a reference synchronization signal block for UE handover according to the present disclosure. [Figure 6] This figure shows one embodiment of identifying a reference synchronization signal block for radio resource control (RRC) re-establishment according to the present disclosure. [Figure 7] This figure shows an exemplary process implemented by, for example, a UE as described in this disclosure. [Figure 8] This figure shows an exemplary process performed, for example, by a network node, as described in this disclosure. [Figure 9] This figure shows an exemplary process implemented by, for example, a UE as described in this disclosure. [Figure 10] This figure shows an exemplary process performed, for example, by a network node, as described in this disclosure. [Figure 11] This is a diagram of an exemplary device for wireless communication according to the present disclosure. [Figure 12] This is a diagram of an exemplary device for wireless communication according to the present disclosure. [Modes for carrying out the invention]

[0027] Hereafter, various aspects of this disclosure will be described more fully with reference to the accompanying drawings. However, this disclosure can be embodied in many different forms and should not be construed as being limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided to make this disclosure sufficient and complete and to fully convey the scope of this disclosure to those skilled in the art. Those skilled in the art should understand that the scope of this disclosure is intended to encompass all aspects of the disclosure disclosed herein, whether implemented independently of or in combination with any other aspects of the disclosure. For example, an apparatus can be implemented or a method can be practiced using any number of aspects described herein. Furthermore, the scope of this disclosure is intended to encompass such apparatus or method that is practiced using other structures, functions, or structures and functions in addition to, or other than, the various aspects of the disclosure described herein. It should be understood that any aspect of the disclosure disclosed herein can be embodied by one or more elements of the claims.

[0028] Next, several embodiments of telecommunications systems are presented with reference to various devices and techniques. These devices and techniques are described in the following “Modes for Carrying Out the Invention” and are shown in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “Elements”). These Elements may be implemented using hardware, software, or a combination thereof. Whether such Elements are implemented as hardware or realized as software depends on the specific application and the design constraints imposed on the overall system.

[0029] While various aspects may be described herein using terms commonly associated with 5G or New Radio (NR) radio access technology (RAT), the aspects of this disclosure may also apply to other RATs, such as 3G RAT, 4G RAT, and / or RATs following 5G (e.g., 6G).

[0030] Figure 1 shows an embodiment of a wireless network 100 according to the present disclosure. The wireless network 100 may, in particular, be a 5G (e.g., NR) network and / or a 4G (e.g., Long-Term Evolution (LTE)) network, or may include elements thereof. The wireless network 100 may include one or more network nodes 110 (shown as network node 110a, network node 110b, network node 110c, and network node 110d), user equipment (UE) 120 or multiple UEs 120 (shown as UE120a, UE120b, UE120c, UE120d, and UE120e), and / or other entities. A network node 110 is a network node that communicates with a UE 120. As shown in the figure, a network node 110 may include one or more network nodes. For example, network node 110 may be an aggregated network node, meaning that the aggregated network node is configured to utilize a radio protocol stack that is physically or logically integrated within a single radio access network (RAN) node (e.g., within a single device or unit). In another embodiment, network node 110 may be a non-aggregated network node (sometimes referred to as a non-aggregated base station), meaning that the network node 110 is configured to utilize a protocol stack that is physically or logically distributed among two or more nodes (such as one or more central units (CUs), one or more distributed units (DUs), or one or more radio units (RUs)).

[0031] In some embodiments, network node 110 is a network node such as an RU that communicates with UE 120 via a wireless access link, or includes such a network node. In some embodiments, network node 110 is a network node such as a DU that communicates with other network nodes 110 via a fronthaul link or a midhaul link, or includes such a network node. In some embodiments, network node 110 is a network node such as a CU that communicates with other network nodes 110 via a midhaul link or with the core network via a backhaul link, or includes such a network node. In some embodiments, network node 110 (such as an aggregated network node 110 or an unaggregated network node 110) may include multiple network nodes, such as one or more RUs, one or more CUs, and / or one or more DUs. Network nodes 110 may include, for example, NR base stations, LTE base stations, node B, eNB (e.g., in 4G), gNB (e.g., in 5G), access points, transmission reception points (TRPs), DUs, RUs, CUs, network mobility elements, core network nodes, network elements, network equipment, RAN nodes, or combinations thereof. In some embodiments, network nodes 110 may interconnect with each other or with one or more other network nodes 110 within the wireless network 100 using any suitable transport network through various types of fronthaul, midhaul, and / or backhaul interfaces, such as direct physical connections, air interfaces, or virtual networks.

[0032] In some embodiments, network node 110 may provide communication coverage to a specific geographic area. In the Third Generation Partnership Project (3GPP), the term “cell” may refer to the coverage area of ​​network node 110 and / or the network node subsystems serving this coverage area, depending on the context in which the term is used. Network node 110 may provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells. A macrocell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access by UEs 120 subscribing to the service. A picocell may cover a relatively small geographic area and may allow unrestricted access by UEs 120 subscribing to the service. A femtocell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs 120 associated with that femtocell (e.g., UEs 120 within a closed subscriber group, CSG). A network node 110 relating to a macrocell may be referred to as a macronetwork node. A network node 110 relating to a picocell may be referred to as a piconetwork node. A network node 110 relating to a femtocell may be referred to as a femtonetwork node or home network node. In the embodiment shown in Figure 1, network node 110a may be a macronetwork node relating to a macrocell 102a, network node 110b may be a piconetwork node relating to a picocell 102b, and network node 110c may be a femtonetwork node relating to a femtocell 102c. A network node may support one or more (e.g., three) cells. In some embodiments, cells may not necessarily be fixed, and the geographical area of ​​a cell may move according to the location of a mobile network node 110 (e.g., a mobile network node).

[0033] In some embodiments, the terms “base station” or “network node” may refer to an aggregated base station, a non-aggregated base station, an integrated access and backhaul (IAB) node, a relay node, or one or more components thereof. For example, in some embodiments, “base station” or “network node” may refer to a CU, DU, RU, a near-real-time (near-RT) RAN intelligent controller (RIC), or a non-RT RIC, or a combination thereof. In some embodiments, the terms “base station” or “network node” may refer to a single device configured to perform one or more functions, such as those described herein in relation to network node 110. In some embodiments, the terms “base station” or “network node” may refer to multiple devices configured to perform one or more functions. For example, in some distributed systems, each of several different devices (which may be located in the same or different geographical locations) may be configured to perform at least a portion of a function, or to replicate the performance of at least a portion of a function, and the terms “base station” or “network node” may refer to any one or more of those different devices. In some embodiments, the terms “base station” or “network node” may refer to one or more virtual base stations or one or more virtual base station functions. For example, in some embodiments, two or more base station functions may be instantiated on a single device. In some embodiments, the terms “base station” or “network node” may refer to one of the base station functions and not another. In this way, a single device may contain two or more base stations.

[0034] The wireless network 100 may include one or more relay stations. A relay station is a network node that can receive data transmissions from upstream nodes (e.g., network node 110 or UE 120) and forward those data transmissions to downstream nodes (e.g., UE 120 or network node 110). A relay station may also be a UE 120 that can relay transmissions to other UE 120s. In the embodiment shown in Figure 1, network node 110d (e.g., a relay network node) may communicate with network node 110a (e.g., a macro network node) and UE 120d to facilitate communication between them. The network node 110 that relays communications may be referred to as a relay station, relay base station, relay network node, relay node, repeater, etc.

[0035] The wireless network 100 may be a heterogeneous network including different types of network nodes 110, such as macronetwork nodes, piconetwork nodes, femtonetwork nodes, and relay network nodes. These different types of network nodes 110 may have different transmit power levels, different coverage areas, and / or different effects on interference within the wireless network 100. For example, macronetwork nodes may have high transmit power levels (e.g., 5 to 40 watts), while piconetwork nodes, femtonetwork nodes, and relay network nodes may have lower transmit power levels (e.g., 0.1 to 2 watts).

[0036] The network controller 130 may be coupled to or communicate with a set of network nodes 110, and may provide coordination and control over these network nodes 110. The network controller 130 may communicate with the network nodes 110 via backhaul or midhaul communication links. The network nodes 110 may communicate with each other directly or indirectly via wireless or wired backhaul communication links. In some embodiments, the network controller 130 may be a CU or core network device, or may include a CU or core network device.

[0037] UE120 can be distributed across the entire wireless network 100, and each UE120 may be fixed or mobile. UE120 may include, for example, access terminals, terminals, mobile stations, and / or subscriber units. UE120 may also include mobile phones (e.g., smartphones), personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, laptop computers, cordless phones, wireless local loop (WLL) stations, tablets, cameras, gaming devices, netbooks, smartbooks, ultrabooks, medical devices, biometric devices, wearable devices (e.g., smartwatches, smart clothing, smart glasses, smart wristbands, smart jewelry (e.g., smart rings or smart bracelets)), entertainment devices (e.g., music devices, video devices, and / or satellite radios), vehicle components or sensors, smart meters / sensors, industrial manufacturing equipment, global positioning system devices, UE functions of network nodes, and / or any other suitable devices configured to communicate via wireless or wired media.

[0038] The UE120 and / or network node 110 may include one or more chips, system-on-chips (SoCs), chipsets, packages, or devices that individually or collectively constitute the processing system. The processing system includes processor (or "processing") circuits in the form of one or more processors, microprocessors, processing units (such as central processing units (CPUs), graphics processing units (GPUs), neural processing units (NPUs), and / or digital signal processors (DSPs)), processing blocks, application-specific integrated circuits (ASICs), programmable logic devices (PLDs) (such as field programmable gate arrays (FPGAs)), or other discrete gate or transistor logic or circuits (all of which may be referred to individually as "processors" or collectively as "processors" or "processor circuits" in this specification). One or more of these processors may be, or can be, configured individually or collectively to perform the various functions or operations described herein. A group of processors that can be collectively configured to perform a set of functions may include a first processor that can be configured to perform a first function of the set and a second processor that can be configured to perform a second function of the set, or it may include a group of processors that are all configured to perform a set of functions.

[0039] The processing system may further include one or more memory devices, memory blocks, memory elements, or other memory circuits in the form of discrete gates or transistor logic or circuits, each of which may include tangible storage media such as random-access memory (RAM) or read-only memory (ROM), or a combination thereof (all of which may be referred to individually as “memory” or collectively as “memory” or “memory circuit” in this specification). One or more of the memories may be coupled to one or more of the processors (for example, operably coupled, communicatively coupled, electronically coupled, or electrically coupled) and may individually or collectively store processor executable code (such as software), and when executed by one or more of the processors, the processor executable code may configure one or more of the processors to perform various functions or operations described herein. In addition or alternatively, in some embodiments, one or more of the processors may be pre-configured to perform various functions or operations described herein without requiring software configuration. The processing system may further include, or be coupled with, one or more modems (such as a Wi-Fi (e.g., IEEE compliant) modem or a cellular (e.g., 3GPP 4G LTE, 5G, or 6G compliant) modem). In some implementations, one or more processors of the processing system include or implement one or more of the modems. The processing system may further include, or be coupled with, multiple radios (collectively, “radios”), multiple RF chains, or multiple transceivers, each of which may then be coupled with one or more of the multiple antennas. In some implementations, one or more processors of the processing system include or implement one or more of the radios, RF chains, or transceivers. The UE120 may include, or be contained within, a housing that accommodates the components associated with the UE120, including the processing system.

[0040] Some UE120s may be considered Machine-Type Communication (MTC) UEs, or evolved or enhanced Machine-Type Communication (eMTC) UEs. Examples of MTC UEs and / or eMTC UEs may include robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with network nodes, other devices (e.g., remote devices), or any other entities. Some UE120s may be considered Internet-of-Things (IoT) devices and / or implemented as NB-IoT (narrowband IoT) devices. Some UE120s may be considered customer premises equipment. A UE120 may be contained within a housing that accommodates its components, such as processor components and / or memory components. In some embodiments, the processor components and memory components may be coupled together. For example, processor components (e.g., one or more processors) and memory components (e.g., memory) can be operably coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0041] In general, any number of wireless networks 100 can be deployed within a given geographical area. Each wireless network 100 may support a specific RAT and may operate on one or more frequencies. RAT may be referred to as wireless technology, air interface, etc. Frequencies may be referred to as carriers, frequency channels, etc. To avoid interference between wireless networks of different RATs, each frequency may support a single RAT within a given geographical area. In some cases, NR or 5G RAT networks may be deployed.

[0042] In some embodiments, two or more UE120s (e.g., indicated as UE120a and UE120e) may communicate directly using one or more sidelink channels (e.g., without using network node 110 as an intermediary for communication with each other). For example, UE120s may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, or vehicle-to-pedestrian (V2P) protocols), and / or mesh networks. In such embodiments, UE120s may perform scheduling operations, resource selection operations, and / or other operations described elsewhere in this specification as being performed by network node 110.

[0043] Devices in wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various classes, bands, channels, etc., depending on frequency or wavelength. For example, devices in wireless network 100 can communicate using one or more operating bands. In 5G NR, two initial operating bands are identified as frequency range designations FR1 (410 MHz to 7.125 GHz) and FR2 (24.25 GHz to 52.6 GHz). It should be understood that although a portion of FR1 is higher than 6 GHz, FR1 is often referred to (interchangeably) as the "sub-6 GHz" band in various documents and papers. A similar nomenclature issue may arise with respect to FR2, which is often referred to (interchangeably) as the "millimeter wave" band in documents and papers, even though it is different from the extremely high frequency (EHF) band (30 GHz to 300 GHz) which is identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0044] The frequencies between FR1 and FR2 are often referred to as intermediate band frequencies. In recent 5G NR research, the operating band for these intermediate band frequencies is identified as frequency range designation FR3 (7.125 GHz to 24.25 GHz). The frequency bands included within FR3 may inherit the characteristics of FR1 and / or FR2, and therefore, the features of FR1 and / or FR2 can be effectively extended to the intermediate band frequencies. Furthermore, higher frequency bands are currently being explored to extend 5G NR operation beyond 52.6 GHz. For example, three higher operating bands have been identified as frequency range designations FR4a or FR4-1 (52.6 GHz to 71 GHz), FR4 (52.6 GHz to 114.25 GHz), and FR5 (114.25 GHz to 300 GHz). Each of these higher frequency bands falls within the EHF band.

[0045] With the above examples in mind, please understand that, unless otherwise specified, terms such as "sub-6GHz" may broadly refer to frequencies that may be below 6GHz, frequencies that may be within the FR1 range, or frequencies that may include intermediate band frequencies. Furthermore, please understand that, unless otherwise specified, terms such as "millimeter wave" may broadly refer to frequencies that may include intermediate band frequencies, frequencies that may be within the FR2, FR4, FR4-a or FR4-1, and / or FR5 ranges, or frequencies that may be within the EHF band. The frequencies included within these operating bands (e.g., FR1, FR2, FR3, FR4, FR4-a, FR4-1, and / or FR5) may be modified, and the techniques described herein are intended to be applicable to those modified frequency ranges.

[0046] In some embodiments, the UE 120 may include a communications manager 140. As described in more detail elsewhere in this specification, the communications manager 140 may, for handover between a serving cell and a target cell, identify whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, and may initiate a handover from the serving cell to the target cell using one or more same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, or using one or more different-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the target cell, respectively. In addition or alternatively, the communications manager 140 may perform one or more other operations described herein.

[0047] In some embodiments, the network node 110 may include a communications manager 150. As described in more detail elsewhere in this specification, the communications manager 150 may transmit configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for a target cell, and may transmit instructions for performing a handover from the serving cell to the target cell, the handover being performed using one or more in-same-frequency measurement or handover conditions, at least in part on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the target cell, respectively, or using one or more different-frequency measurement or handover conditions, at least in part on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the target cell, respectively. In addition or alternatively, the communications manager 150 may perform one or more other operations described herein.

[0048] In some embodiments, the communications manager 140 may, for RRC re-establishment, identify whether the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the adjacent cell, respectively, and initiate RRC re-establishment using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the adjacent cell, respectively, or using one or more cross-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the adjacent cell, respectively. In addition or alternatively, the communications manager 140 may perform one or more other operations described herein.

[0049] In some embodiments, the communications manager 150 may transmit configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for an adjacent cell, and may transmit instructions to perform RRC re-establishment, which is performed using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively, or using one or more cross-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively. In addition or alternatively, the communications manager 150 may perform one or more other operations described herein.

[0050] As described above, Figure 1 is provided as one embodiment. Other embodiments may differ from those described with respect to Figure 1.

[0051] Figure 2 shows one embodiment 200 of a network node 110 communicating with a UE 120 within a wireless network 100 according to the present disclosure. The network node 110 may be equipped with a set of antennas 234a to 234t, such as T antennas (T≧1). The UE 120 may be equipped with a set of antennas 252a to 252r, such as R antennas (R≧1). The network node 110 in embodiment 200 includes one or more radio frequency components, such as antenna 234 and modem 232. In some embodiments, the network node 110 may include an interface, a communication component, or other components that facilitate communication with the UE 120 or another network node. Some network nodes 110 may not include radio frequency components that facilitate direct communication with the UE 120, such as one or more CUs or one or more DUs.

[0052] At network node 110, the transmit processor 220 may receive data from data source 212 addressed to UE120 (or a set of UE120s). The transmit processor 220 may select one or more modulation and coding schemes (MCSs) for the UE120, at least in part on one or more channel quality indicators (CQIs) received from the UE120. The network node 110 may process (e.g., encode and modulate) the data for the UE120, at least in part on the selected MCS(s) for the UE120, and may provide data symbols to the UE120. The transmit processor 220 may process system information (e.g., related to semi-static resource partitioning information (SRPI)) and control information (e.g., CQI requests, authorizations, and / or upper-layer signaling), and may provide overhead symbols and control symbols. The transmit processor 220 may generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS) or demodulation reference signals (DMRS)) and synchronization signals (e.g., primary synchronization signals (PSS) or secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may, where applicable, perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, and may provide a set of output symbol streams (e.g., T output symbol streams) to the corresponding set of modems 232 (e.g., T modems) indicated as modems 232a to 232t. For example, each output symbol stream may be provided to a modulator component (indicated as MOD) of modem 232.Each modem 232 may acquire an output sample stream by processing the corresponding output symbol stream (for example, for OFDM) using the corresponding modulator component. Each modem 232 may further acquire a downlink signal by processing the output sample stream (for example, converting it to analog, amplifying it, filtering it, and / or upconverting it) using the corresponding modulator component. Modems 232a to 232t may transmit a set of downlink signals (for example, T downlink signals) over the corresponding set of antennas 234 (for example, T antennas) indicated as antennas 234a to 234t.

[0053] In UE120, a set of antennas 252 (indicated as antennas 252a to 252r) may receive downlink signals from network node 110 and / or other network nodes 110, and may provide a set of received signals (e.g., R received signals) to a set of modems 254 (e.g., R modems) indicated as modems 254a to 254r. For example, each received signal may be provided to a demodulator component of a modem 254 (indicated as DEMOD). Each modem 254 may acquire input samples by modifying the received signals (e.g., filtering, amplifying, downconverting, and / or digitizing) using the corresponding demodulator component. Each modem 254 may further process the input samples (e.g., for OFDM) using the demodulator component to acquire received symbols. A MIMO detector 256 may acquire received symbols from the modem 254, perform MIMO detection on the received symbols where applicable, and provide the detected symbols. The receiving processor 258 may process the detected symbols (e.g., demodulate and decode), provide the decoded data for UE120 to the data sink 260, and provide the decoded control and system information to the controller / processor 280. The term "controller / processor" may refer to one or more controllers, one or more processors, or a combination thereof. The channel processor may, in particular, determine the reference signal received power (RSRP) parameter, the received signal strength indicator (RSSI) parameter, the reference signal received quality (RSRQ) parameter, and / or the CQI parameter. In some embodiments, one or more components of UE120 may be contained within the housing 284.

[0054] The network controller 130 may include a communication unit 294, a controller / processor 290, and memory 292. The network controller 130 may include, for example, one or more devices in the core network. The network controller 130 can communicate with the network node 110 via the communication unit 294.

[0055] One or more antennas (e.g., antennas 234a-234t and / or antennas 252a-252r) may, in particular among the examples, include, or be included in, one or more antenna panels, one or more antenna groups, one or more sets of antenna elements, and / or one or more antenna arrays. An antenna panel, antenna group, set of antenna elements, and / or antenna array may include one or more antenna elements (in a single housing or multiple housings), a set of coplanar antenna elements, a set of non-coplanar antenna elements, and / or one or more antenna elements coupled to one or more transmitting and / or receiving components, such as one or more components in Figure 2.

[0056] On the uplink, in UE120, the transmit processor 264 may receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reporting, including RSRP, RSSI, RSRQ, and / or CQI). The transmit processor 264 may generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by the TX MIMO processor 266, where applicable, further processed by the modem 254 (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to the network node 110. In some embodiments, the modem 254 of UE120 may include a modulator and a demodulator. In some embodiments, UE120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modem(s) 254, MIMO detector 256, receive processor 258, transmit processor 264, and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., a controller / processor 280) and memory 282 to carry out any of the methods described herein (see, for example, Figures 5 to 12).

[0057] In the network node 110, uplink signals from UE 120 and / or other UEs may be received by antenna 234, processed by modem 232 (e.g., the demodulator component of modem 232, shown as DEMOD), detected by MIMO detector 236 where applicable, and further processed by receiving processor 238 to obtain decoded data and control information sent by UE 120. The receiving processor 238 may provide the decoded data to data sink 239 and the decoded control information to controller / processor 240. The network node 110 may include a communication unit 244, which may communicate with the network controller 130 via the communication unit 244. The network node 110 may include a scheduler 246 for scheduling one or more UE 120 for downlink and / or uplink communication. In some embodiments, the modem 232 of the network node 110 may include a modulator and a demodulator. In some embodiments, the network node 110 includes a transceiver. The transceiver may include any combination of an antenna(s) 234, a modem(s) 232, a MIMO detector 236, a receiving processor 238, a transmitting processor 220, and / or a TX MIMO processor 230. The transceiver may be used by a processor (e.g., a controller / processor 240) and memory 242 to carry out any aspect of the methods described herein (see, for example, Figures 5 to 12).

[0058] As described in more detail elsewhere in this specification, the controller / processor 240 of network node 110, the controller / processor 280 of UE 120, and / or any other component(s) in Figure 2 may implement one or more techniques associated with the reference SSB for UE handover. For example, the controller / processor 240 of network node 110, the controller / processor 280 of UE 120, and / or any other component(s) in Figure 2 may implement or direct the operation of, for example, process 600 in Figure 6, process 700 in Figure 7, and / or other processes as described herein. Memories 242 and 282 may store data and program code for network node 110 and UE 120, respectively. In some embodiments, memory 242 and / or memory 282 may include non-temporary computer-readable media storing one or more instructions (e.g., code and / or program code) for wireless communication. For example, when one or more instructions are executed by one or more processors of the network node 110 and / or UE 120 (e.g., directly, or after being compiled, translated, and / or interpreted), one or more processors, UE 120, and / or network node 110 may be caused to perform or direct the operation of, for example, process 600 in Figure 6, process 700 in Figure 7, and / or other processes as described herein. In some embodiments, executing an instruction may include, among other examples, running the instruction, translating the instruction, compiling the instruction, and / or interpreting the instruction.

[0059] In some embodiments, the UE includes means for determining whether the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for a target cell, respectively, and / or means for initiating a handover from a serving cell to a target cell using one or more in-same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for a target cell, respectively, or using one or more inter-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of a reference SSB for a serving cell are different from the center frequency and SCS of a reference SSB for a target cell, respectively. Means for the user equipment (UE) to perform the operations described herein may include, for example, one or more of the following: a communications manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receiving processor 258, a transmitting processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0060] In some embodiments, a network node includes means for transmitting configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for a target cell, and / or means for transmitting instructions for performing a handover from a serving cell to a target cell, the handover being performed using one or more in-same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the target cell, respectively, or using one or more different-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the target cell, respectively. Means for a network node to perform the operations described herein may include, for example, one or more of the following: a communications manager 150, a transmitting processor 220, a TX MIMO processor 230, a modem 232, an antenna 234, a MIMO detector 236, a receiving processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0061] In some embodiments, the UE includes means for determining whether the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, and / or means for initiating RRC re-establishment using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of a reference SSB for a serving cell are different from the center frequency and SCS of a reference SSB for an adjacent cell. Means for the user equipment (UE) to perform the operations described herein may include, for example, one or more of the following: a communications manager 140, an antenna 252, a modem 254, a MIMO detector 256, a receiving processor 258, a transmitting processor 264, a TX MIMO processor 266, a controller / processor 280, or a memory 282.

[0062] In some embodiments, the network node includes means for transmitting configuration information indicating one or more reference SSBs for a serving cell or one or more reference SSBs for an adjacent cell, and / or means for transmitting instructions to perform RRC re-establishment, which is performed using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively. Means for the network node to perform the operations described herein may include, for example, one or more of the following: a communications manager 150, a transmit processor 220, a TX MIMO processor 230, a modem 232, an antenna 234, a MIMO detector 236, a receive processor 238, a controller / processor 240, a memory 242, or a scheduler 246.

[0063] Although the blocks in Figure 2 are shown as individual components, the functions described above with respect to these blocks may be implemented in a single hardware, software, or combination of components, or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and / or the TX MIMO processor 266 may be performed by or under the control of the controller / processor 280.

[0064] As described above, Figure 2 is provided as one embodiment. Other embodiments may differ from those described with respect to Figure 2.

[0065] The deployment of communication systems such as 5G NR systems can be configured in multiple ways using various components or parts. In a 5G NR system or network, network nodes, network entities, network mobility elements, RAN nodes, core network nodes, network elements, base stations, or network equipment can be implemented in an aggregated or unaggregated architecture. For example, a base station (e.g., in particular, Node B (NB), evolved NB (eNB), NR base station, 5G NB, access point (AP), TRP, or cell), or one or more units (or one or more components) performing base station functions may be implemented as an aggregated base station (also known as a standalone base station or monolithic base station) or an unaggregated base station. "Network entity" or "network node" may refer to an unaggregated base station, or to one or more units of an unaggregated base station (such as one or more CUs, one or more DUs, one or more RUs, or a combination thereof).

[0066] An aggregated base station (e.g., an aggregated network node) may be configured to utilize a radio protocol stack that is physically or logically integrated within a single RAN node (e.g., within a single device or unit). A non-aggregated base station (e.g., a non-aggregated network node) may be configured to utilize a protocol stack that is physically or logically distributed among two or more units (such as one or more CUs, one or more DUs, or one or more RUs). In some embodiments, a CU may be implemented within a network node, and one or more DUs may be co-located with that CU, or alternatively, geographically or virtually distributed across one or more other network nodes. A DU may be implemented to communicate with one or more RUs. Each of the CU, DU, and RU may also be implemented as a virtual unit, such as a virtual central unit (VCU), a virtual distributed unit (VDU), or a virtual radio unit (VRU), among other examples.

[0067] The operation or network design of a base station type may take into account the aggregation characteristics of the base station functions. For example, non-aggregated base stations may be used in IAB networks, open radio access networks (O-RAN (such as network configurations supported by the O-RAN Alliance)), or virtualized radio access networks (vRAN, also known as cloud radio access networks, C-RAN) to facilitate scaling of the communication system by separating base station functions into one or more units that can be deployed individually. Non-aggregated base stations may include functions implemented across two or more units in various physical locations, as well as functions virtually implemented in at least one unit, which can allow for flexibility in network design. Various units of a non-aggregated base station can be configured to communicate with at least one other unit of the non-aggregated base station via wired or wireless communication.

[0068] Figure 3 shows an exemplary non-aggregated base station architecture 300 according to the present disclosure. The non-aggregated base station architecture 300 may include a CU 310 that can communicate directly with the core network 320 via a backhaul link, or indirectly with the core network 320 via one or more non-aggregated control units (e.g., a quasi-RT RIC 325 via an E2 link, or a non-RT RIC 315 associated with a Service Management and Orchestration (SMO) framework 305, or both). The CU 310 may communicate with one or more DU 330 via their respective midhaul links, for example, via an F1 interface. Each DU 330 may communicate with one or more RU 340 via their respective fronthaul links. Each RU 340 may communicate with one or more UE 120 via their respective radio frequency (RF) access links. In some implementations, the UE 120 may be serviced simultaneously by multiple RU 340s.

[0069] Each of the units, including CU310, DU330, RU340, and the quasi-RT RIC325, non-RT RIC315, and SMO framework 305, may include, or be coupled to, one or more interfaces configured to receive or transmit signals, data, or information (collectively, signals) via a wired or wireless transmission medium. An associated processor or controller that provides instructions to the communication interfaces of each unit, or one or more of the corresponding units, may be configured to communicate with one or more of the other units via a transmission medium. In some embodiments, each unit may include a wired interface configured to receive or transmit signals via a wired transmission medium to one or more of the other units, and a wireless interface which may include a receiver, transmitter, or transceiver (such as an RF transceiver) configured to receive or transmit or receive signals via a wireless transmission medium to one or more of the other units.

[0070] In some embodiments, the CU310 may host one or more higher-layer control functions. Examples of such control functions include, but are not limited to, radio resource control (RRC), packet data convergence protocol (PDCP), or service data adaptation protocol (SDAP). Each control function may implement an interface configured to communicate signals with other control functions hosted by the CU310. The CU310 may be configured to handle user plane functions (e.g., Central Unit - User Plane (CU-UP) functions), control plane functions (e.g., Central Unit - Control Plane (CU-CP) functions), or a combination thereof. In some implementations, the CU310 can be logically divided into one or more CU-UP units and one or more CU-CP units. When implemented in an O-RAN configuration, the CU-UP units can communicate bidirectionally with the CU-CP units via an interface such as the E1 interface. The CU310 can be implemented to communicate with the DU330 as needed for network control and signaling.

[0071] Each DU330 may correspond to a logic unit containing one or more base station functions for controlling the operation of one or more RU340s. In some embodiments, the DU330 may host one or more of the radio link control (RLC) layer, the medium access control (MAC) layer, and one or more upper physical (PHY) layers, at least in part according to a functional partition such as a functional partition as defined by 3GPP. In some embodiments, one or more upper PHY layers may be implemented by one or more modules, among other examples, for forward error correction (FEC) coding and decoding, scrambling, and modulation and demodulation. In some embodiments, the DU330 may further host one or more lower-level PHY layers, such as those implemented by one or more modules for fast Fourier transform (FFT), inverse FFT (iFFT), digital beamforming, or physical random access channel (PRACH) extraction and filtering. Each layer (sometimes also referred to as a module) may be implemented with an interface configured to communicate signals with other layers (and modules) hosted by the DU330, or with control functions hosted by the CU310.

[0072] Each RU340 can implement lower-layer functions. In some deployments, a RU340 controlled by a DU330 may correspond to a logical node hosting RF processing functions or lower-PHY layer functions, such as performing FFT, iFFT, digital beamforming, or PRACH extraction and filtering, based on a functional partitioning (e.g., functional partitioning defined by 3GPP), such as lower-layer functional partitioning. In such architectures, each RU340 can be operated to handle over-the-air (OTA) communication with one or more UE120s. In some implementations, the real-time and non-real-time modes of control plane and user plane communication with the RU340 can be controlled by the corresponding DU330. In some scenarios, this configuration allows each DU330 and CU310 to be implemented in a cloud-based RAN architecture, such as a vRAN architecture.

[0073] The SMO framework 305 may be configured to support RAN deployment and provisioning of non-virtualized and virtualized network elements. For non-virtualized network elements, the SMO framework 305 may be configured to support the deployment of dedicated physical resources for RAN coverage requirements, which can be managed via an operation and maintenance interface (such as the O1 interface). For virtualized network elements, the SMO framework 305 may be configured to interact with a cloud computing platform (such as the open cloud (O-Cloud) platform 390) to perform lifecycle management of the network element (such as instantiating virtualized network elements) via a cloud computing platform interface (such as the O2 interface). Such virtualized network elements may include, but are not limited to, the CU310, DU330, RU340, non-RT RIC315, and quasi-RT RIC325. In some implementations, the SMO framework 305 may communicate with hardware embodiments of the 4G RAN, such as the open eNB (O-eNB) 311, via the O1 interface. In addition, in some implementations, the SMO framework 305 can communicate directly with each of one or more RU340s via a corresponding O1 interface. The SMO framework 305 may also include a non-RT RIC315 configured to support the functionality of the SMO framework 305.

[0074] Non-RT RIC315 may be configured to include logical functions that enable policy-based guidance for non-real-time control and optimization of RAN elements and resources, artificial intelligence / machine learning (AI / ML) workflows including model training and updating, or applications / functions in quasi-RT RIC325. Non-RT RIC315 may be coupled to or communicate with quasi-RT RIC325 (via the A1 interface, for example). Quasi-RT RIC325 may be configured to include logical functions that enable quasi-real-time control and optimization of RAN elements and resources through data acquisition and action via an interface connecting one or more CU310s, one or more DU330s, or both, and an O-eNB to the quasi-RT RIC325 (via the E2 interface, for example).

[0075] In some implementations, the non-RT RIC315 may receive parameter or external enrichment information from an external server to generate an AI / ML model that will be deployed in the quasi-RT RIC325. Such information may be utilized by the quasi-RT RIC325 and may be received in the SMO framework 305 or the non-RT RIC315 from a non-network data source or from a network function. In some embodiments, the non-RT RIC315 or quasi-RT RIC325 may be configured to adjust the behavior or performance of the RAN. For example, the non-RT RIC315 may monitor long-term trends and patterns in performance and take corrective action using the AI / ML model, either through the SMO framework 305 (e.g., reconfiguration via the O1 interface) or by creating a RAN management policy (e.g., an A1 interface policy).

[0076] As described above, Figure 3 is provided as one embodiment. Other embodiments may differ from those described with respect to Figure 3.

[0077] FIG. 4 is a diagram illustrating an example 400 of bandwidth portion and synchronization signal block configuration according to the present disclosure. A UE may perform a handover from a serving cell 405 to a target cell 410. The handover may be performed at least in part based on, for example, the movement of the UE from the coverage area of the serving cell 405 to the coverage area of the target cell 410 and / or at least in part based on reference signal measurement values associated with the serving cell 405 and the target cell 410. The handover may be from an NR primary cell (PCell) to another NR cell such as another NR PCell or an NR secondary cell (SCell).

[0078] In some cases, the UE may receive a radio resource control (RRC) message from the serving cell 405 and / or the target cell 410 indicating that the UE is to perform a handover. The UE may need to be ready to start an uplink physical random access channel (PRACH) transmission within D Δ , , processing , , IU , margin , search milliseconds (ms) from the end of the last transmission time interval (TTI) including the RRC command. In some cases, D handover may be equal to the applicable RRC procedure delay (such as defined in section 12 of Technical Specification (TS) 38.331 of the 3GPP specifications) plus the interrupt time T interrupt added thereto, and T interrupt is defined as follows. T interrupt = T search + T IU + T processing + T Δ + T margin ms, where T search is the time required for the UE to search for the target cell when it is not known when the handover command is received by the UE, and T IUThis is the interruption uncertainty when acquiring the first available PRACH opportunity in the target cell. T processing This is the processing time associated with the UE, T Δ This is the time required for fine-time tracking and acquisition of complete timing information for the target cell. T margin This is the time required for SSB post-processing.

[0079] In some cases, T search This may depend on whether the handover is an intra-frequency handover or an inter-frequency handover. A handover can be classified as an intra-frequency handover if the center frequency of the SSB for the serving cell and the center frequency of the SSB for the adjacent cell (e.g., the target cell) are the same, and the SCS of the SSB for the serving cell and the SCS of the SSB for the adjacent cell are also the same. In the case of RedCap UE, if the target cell is known, T search =0ms. If the target cell is an unknown cell of the same frequency and the target cell Es / Iot ≥ -2dB, then T search =2 * T rs It is ms. If the target cell is an unknown different frequency cell and the target cell Es / Iot ≥ -2dB, then T search =5 * T rs It is ms. In some cases, T rsThis could be the non-cell defining (NCD)-SSB indicated by nonCellDefiningSSB-r17 if the first active DL bandwidth-part (BWP) included in the handover command is set in nonCellDefiningSSB-r17, or, otherwise, the synchronization signal block measurement timing configuration (SMTC) set in measObjectNR having the same SSB frequency and SCS as the cell-defining (CD)-SSB indicated by absoluteFrequencySSB in frequencyInfoDL in the handover command.

[0080] In some cases, the classification of the handover from serving cell 405 to target cell 410 as either intra-frequency or inter-frequency may depend on whether the SSB of target cell 410 is measured as an intra-frequency or inter-frequency measurement object.

[0081] In some cases, a UE may be a reduced capabilities (RedCap) UE. A RedCap UE is a UE that has a reduced or limited set of features or capabilities, such as a subset of the features and capabilities described above for UE120. A RedCap UE (for example, as defined by feature 28-1 in the 3GPP specification) may have one or more of the features shown in Table 1.

[0082] [Table 1]

[0083] In some cases, for a RedCap UE, two or more SSBs may be indicated as the serving cell's SSB. RAN2 defines which SSB should be used as the reference SSB for defining in-frequency and out-of-frequency measurements. In some cases, a BWP-specific serving cell measurement object (MO) (servingCellMO) may be defined under BWP-DownlinkDedicated, and the SSB indicated in servingCellMO is the reference SSB to be used for serving cell measurements when the UE is in this active BWP. If this instruction is not present, the SSB defined in servingCellMO under ServingCellConfig is the reference SSB to be used for serving cell measurements. This reference SSB may be used to define in-frequency measurements. In some cases, a RedCap UE may hand over to a BWP that includes an NCD-SSB but does not include a CD-SSB.

[0084] In handover procedures for non-RedCap UEs (e.g., legacy handover), a single SSB (e.g., CD-SSB) may exist in the target cell. This SSB can be designated as the servingCellMO of the target cell and may be used for cell discovery and measurement of the target cell during and after the handover procedure. This SSB may also exist during the firstActiveBWP of the target cell and may be set as the targetCellMO of the serving cell.

[0085] In some cases, a RedCap UE may be configured using multiple SSBs in the serving cell and / or target cell. For example, a RedCap UE may be configured using a CD-SSB and one or more NCD-SSBs in the serving cell, and / or a CD-SSB and one or more NCD-SSBs in the target cell. A RedCap UE (and / or network node) may not be able to determine which SSB in the target cell should be used to classify a handover as an intra-frequency handover or an inter-frequency handover. For example, a RedCap UE may not be able to determine whether to use the SSB set in the serving cell's targetCellMO, the SSB set in the target cell's firstActiveBWP, or the SSB set in the target cell's servingCellMO as the reference SSB for the target cell. Additionally or alternatively, a RedCap UE (and / or network node) may not be able to determine which SSB in the serving cell should be used to classify a handover as an intra-frequency handover or an inter-frequency handover. For example, a RedCap UE may be unable to determine whether to use the SSB configured within the active BWP, the SSB defined in the servingCellMO, or the BWP-specific servingCellMO (if defined) as the reference SSB for the serving cell. Consequently, the UE (and / or network node) may be unable to accurately determine timing information, such as the time to search for the target cell in order to perform a handover from the serving cell to the target cell.

[0086] Techniques and apparatus for reference SSBs for UE handover as described herein. A UE may determine whether the center frequency and SCS of a reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for a target cell, respectively, for a handover between a serving cell and a target cell. The UE may initiate a handover from a serving cell to a target cell using one or more in-same-frequency measurement and / or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are the same as the center frequency and SCS of the reference SSB for a target cell, respectively. Alternatively, the UE may initiate a handover from a serving cell to a target cell using one or more different-frequency measurement and / or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are different from the center frequency and SCS of the reference SSB for a target cell, respectively. The reference SSB for a serving cell may correspond to, for example, an SSB set in a serving cell measurement object, an SSB set in a bandwidth portion-specific serving cell measurement object, or an SSB set in the active bandwidth portion of the serving cell. The reference SSB for a target cell may correspond to, for example, an SSB set in the first active bandwidth portion of the target cell, an SSB set in the target cell's serving cell measurement object, an SSB set in a bandwidth portion-specific serving cell measurement object of the target cell, or an SSB set in the serving cell's target cell measurement object. This may enable the UE (and / or network node) to determine timing information, such as the time to search for the target cell in order to perform a handover from the serving cell to the target cell. Further details are described herein.

[0087] As described above, Figure 4 is provided as one embodiment. Other embodiments may differ from those described with respect to Figure 4.

[0088] Figure 5 shows one embodiment 500 of the present disclosure that identifies a reference SSB for UE handover. UE 505 can communicate with network nodes 510 and 515. For example, network node 510 may be associated with a serving cell, and network node 515 may be associated with a target cell, and UE 505 can communicate with network nodes 510 and 515 while performing a handover from the serving cell to the target cell. In some embodiments, UE 505 may be a RedCap UE.

[0089] As indicated by reference number 520, the network node 510 may transmit configuration information, and the UE 505 may receive configuration information. The configuration information may indicate a reference SSB for the serving cell and / or a reference SSB for the target cell. In some embodiments, the configuration information may indicate two or more reference SSBs for the serving cell. For example, the configuration information may indicate a CD-SSB for the serving cell and one or more NCD-SSBs for the serving cell. As an addition or alternative, the configuration information may indicate two or more reference SSBs for the target cell. For example, the configuration information may indicate a CD-SSB for the target cell and one or more NCD-SSBs for the target cell. The configuration information may be indicated, for example, via sidelink control information (SCI), media access control (MAC) control element (CE) (MAC-CE), radio resource control (RRC) messages, system information, and / or in handover commands. In some embodiments, the configuration information may be indicated in a specification such as a 3GPP specification.

[0090] In some embodiments, UE505 may be configured using configuration information (e.g., pre-configured) and / or may receive configuration information from another device or network node. In this case, UE505 does not need to receive configuration information from network node 510.

[0091] As shown by reference number 525, network node 510 may send a handover instruction, and UE 505 may receive a handover instruction. The handover instruction may indicate that UE 505 will perform a handover from the serving cell (and / or network node 510) to the target cell (and / or network node 515).

[0092] As shown by reference number 530, UE505 can identify whether the center frequency and SCS of the reference SSB for a serving cell are the same as the center frequency and SCS of the reference SSB for a target cell, respectively. In some embodiments, the reference SSB for a serving cell may correspond, for example, in particular to the SSB set in a serving cell measurement object (servingCellMO), an SSB set in a bandwidth portion-specific serving cell measurement object (BWP-specific servingCellMO), or an SSB set in the active bandwidth portion of the serving cell. The reference SSB for a target cell may correspond, for example, in particular to the SSB set in the first active bandwidth portion (firstActiveBWP) of the target cell, an SSB set in the serving cell measurement object (servingCellMO) of the target cell, an SSB set in a bandwidth portion-specific serving cell measurement object (BWP-specific servingCellMO) of the target cell, or an SSB set in the target cell measurement object (targetCellMO) of the serving cell.

[0093] In some embodiments, the reference SSB for the serving cell may correspond to the SSB set in the servingCellMO of the serving cell (or, if set, the BWP-specific servingCellMO), and the reference SSB for the target cell may correspond to the SSB set in the firstActiveBWP of the target cell. In this case, the handover may be classified as an intra-frequency handover ("intra") or an inter-frequency handover ("inter"), as shown in Table 2.

[0094] [Table 2]

[0095] In some embodiments, the reference SSB for the serving cell may correspond to the SSB set in the servingCellMO of the serving cell (or, if set, the BWP-specific servingCellMO), and the reference SSB for the target cell may correspond to the SSB set in the servingCellMO of the target cell (or, if set, the BWP-specific servingCellMO). In this case, the handover may be considered an intra-frequency handover or an inter-frequency handover, as shown in Table 3.

[0096] [Table 3]

[0097] As shown by reference no. 535, the UE505 may initiate a handover from a serving cell to a target cell using one or more in-same-frequency measurement and / or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively. Alternatively, the UE505 may initiate a handover from a serving cell to a target cell using one or more different-frequency measurement and / or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the target cell, respectively. One or more in-same-frequency measurements are, for example, a first search time (e.g., T) for searching for the target cell. search =T rs This can correspond to ms). Alternatively, one or more inter-frequency measurements can be used, for example, to provide a second search time (e.g., T) for searching for the target cell. search =3 * T rs It can handle ms.

[0098] In some embodiments, the UE505 may receive priority instructions for selecting a reference SSB from multiple SSBs. For example, the reference SSB for a serving cell may correspond to the SSB in the serving cell's active BWP, or to the SSB in the servingCellMO of the serving cell. Priority information may indicate, if configured, to use the SSB corresponding to the SSB in the serving cell's active BWP, or otherwise to use the SSB corresponding to the SSB in the servingCellMO of the serving cell. Priority information may be indicated, for example, via sidelink control information (SCI), media access control (MAC) control element (CE) (MAC-CE), radio resource control (RRC) messages, system information, and / or in handover commands. In some embodiments, priority information may be indicated in a specification, such as a 3GPP specification. In some embodiments, priority information may indicate an order for selecting a reference SSB from multiple reference SSBs.

[0099] In some embodiments, UE505 may select a reference SSB from multiple SSBs, at least partially based on UE capability information. For example, UE505 may be configured using a CD-SSB or NCD-SSB in the active BWP. UE505 may select an SSB in the active BWP that should be the reference SSB for the serving cell. In some embodiments, UE505 (e.g., a 28-1a UE as described in Table 1) may not be guaranteed to have any SSBs in its active BWP. Therefore, UE505 may select an SSB corresponding to an SSB in the servingCellMO of the serving cell as the reference SSB (e.g., even if UE505's active BWP contains an SSB). The type of UE505 (e.g., whether the UE is a 28-1 UE or a 28-1a UE) may affect the selection of the target cell's reference SSB after the handover is complete. Additionally or alternatively, the type of UE may affect the serving cell's reference SSB.

[0100] As indicated by reference number 540, UE505 and network node 515 may communicate a handover completion message. In addition, UE505 and network node 515 may communicate other information after the handover is complete.

[0101] As described above, Figure 5 is provided as one embodiment. Other embodiments may differ from those described with respect to Figure 5.

[0102] RRC connection re-establishment can be initiated when a UE in the RRC_CONNECTED state loses its RRC connection due to one or more failure events, such as a radio link failure, handover failure, or RRC connection re-establishment failure. In the RRC_CONNECTED state, the UE will initiate RRC connection re-establishment from the time the UE detects the loss of RRC connection. re-establish_delay It may be possible to send an RRCRe-establishmentRequest message within seconds. Total RRC connection delay (T re-establish_delay )teeth, T re-establish_delay =T UE_re-establish_delay +T UL_grant It may be smaller than that, in the formula T UL_grant This is the time required to obtain and process an uplink grant from an adjacent PCell. An uplink grant may be required to send an RRCRe-establishmentRequest message.

[0103] Figure 6 shows one embodiment 600 of the present disclosure for identifying a reference SSB for RRC re-establishment. UE 605 can communicate with network node 610 and network node 615. Network node 610 may be associated with a serving cell, and network node 615 may be associated with an adjacent cell. In some embodiments, UE 605 may be a RedCap UE.

[0104] As indicated by reference number 620, network node 610 may transmit configuration information, and UE 605 may receive configuration information. The configuration information may indicate a reference SSB for the serving cell and / or a reference SSB for the neighboring cell. In some embodiments, the configuration information may indicate two or more reference SSBs for the serving cell. For example, the configuration information may indicate a CD-SSB for the serving cell and one or more NCD-SSBs for the serving cell. As an addition or alternative, the configuration information may indicate two or more reference SSBs for the neighboring cell. For example, the configuration information may indicate a CD-SSB for the neighboring cell and one or more NCD-SSBs for the neighboring cell. The configuration information may be indicated, for example, via sidelink control information (SCI), media access control (MAC) control element (CE) (MAC-CE), radio resource control (RRC) messages, and / or system information. In some embodiments, the configuration information may be indicated in a specification such as a 3GPP specification.

[0105] As shown by reference no. 625, UE605 can identify whether the center frequency and SCS of the reference SSB for a serving cell are the same as the center frequency and SCS of the reference SSB for an adjacent cell, respectively. In some embodiments, the reference SSB for a serving cell may, in particular in the examples, correspond to the cell-defining SSB of the serving cell, the SSB set in the active bandwidth portion of the serving cell, the SSB set in the serving cell measurement object (servingCellMO), or, if set, a bandwidth portion-specific servingCellMO. The reference SSB for an adjacent cell may, in particular in the examples, correspond to the cell-defining SSB,, if set, one of one or more non-cell-defining SSBs, or the SSB set in the measurement object for the adjacent cell.

[0106] As indicated by reference no. 630, the UE605 may initiate RRC re-establishment using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the adjacent cell, respectively. Alternatively, the UE605 may initiate RRC re-establishment using one or more out-of-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the adjacent cell, respectively.

[0107] In some embodiments, the UE605 may receive priority instructions for selecting a reference SSB from multiple SSBs. For example, the reference SSB for a serving cell may correspond to the SSB in the serving cell's active BWP, or to the SSB in the servingCellMO of the serving cell. Priority information may indicate, if set, to use the SSB corresponding to the SSB in the serving cell's active BWP, or otherwise to use the SSB corresponding to the SSB in the servingCellMO of the serving cell. Priority information may be indicated, for example, via sidelink control information (SCI), media access control (MAC) control element (CE) (MAC-CE), radio resource control (RRC) messages, system information, and / or in RRC re-establishment commands. In some embodiments, priority information may be indicated in a specification, such as a 3GPP specification. In some embodiments, priority information may indicate an order for selecting a reference SSB from multiple reference SSBs.

[0108] In some embodiments, UE605 may select a reference SSB from multiple SSBs, at least partially based on UE capability information. For example, UE605 may be configured using a CD-SSB or NCD-SSB in the active BWP. UE605 may select an SSB in the active BWP that should be the reference SSB for the serving cell. In some embodiments, UE605 (e.g., a 28-1a UE as described in Table 1) may not be guaranteed to have any SSBs in its active BWP. Therefore, UE605 may select an SSB corresponding to an SSB in the servingCellMO of the serving cell as the reference SSB (e.g., even if the UE605's active BWP contains an SSB). The type of UE605 (e.g., whether the UE is a 28-1 UE or a 28-1a UE) may affect the selection of the reference SSB for neighboring cells after RRC re-establishment is complete. Additionally or alternatively, the type of UE may affect the reference SSB for the serving cell.

[0109] As indicated by reference number 635, UE605 and network node 615 can communicate an RRC re-establishment complete message.

[0110] As described above, Figure 6 is provided as one embodiment. Other embodiments may differ from those described with respect to Figure 6.

[0111] Figure 7 shows an exemplary process 700 performed by, for example, a UE according to the present disclosure. The exemplary process 700 is an embodiment in which a UE (e.g., UE120) performs an operation associated with identifying a reference SSB.

[0112] As shown in Figure 7, in some embodiments, process 700 may include identifying (block 710) whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, for handover between the serving cell and the target cell. For example, the UE may identify, as described above (for example, using the communication manager 1106 shown in Figure 11), whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, for handover between the serving cell and the target cell.

[0113] As further shown in Figure 7, in some embodiments, process 700 may include initiating a handover from a serving cell to a target cell (block 720) using one or more in-same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, or using one or more inter-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the target cell, respectively. For example, a UE may initiate a handover from a serving cell to a target cell using one or more in-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, or using one or more inter-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the target cell, respectively.

[0114] Process 700 may include additional embodiments, such as any single embodiment or any combination of embodiments, described below and / or in relation to one or more other processes described elsewhere in this Specified Specification.

[0115] In the first embodiment, the UE is a capacity-reducing UE.

[0116] In the second embodiment, the UE is configured, either alone or in combination with the first embodiment, using at least two SSBs for the serving cell or at least two SSBs for the target cell.

[0117] In the third embodiment, either alone or in combination with one or more of the first and second embodiments, at least two SSBs for a serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and at least two SSBs for a target cell include a cell-defining SSB and one or more non-cell-defining SSBs.

[0118] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the reference SSB for a serving cell corresponds to the SSB set in the serving cell measurement object, the SSB set in the bandwidth portion-specific serving cell measurement object, if set, or the SSB set in the active bandwidth portion of the serving cell.

[0119] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the reference SSB for the target cell corresponds to the SSB set in the first active bandwidth portion of the target cell, the SSB set in the serving cell measurement object of the target cell, the SSB set in the serving cell measurement object specific to the bandwidth portion of the target cell, if set, or the SSB set in the target cell measurement object of the serving cell.

[0120] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the process 700 includes receiving priority information for selecting a reference SSB for a serving cell from a plurality of SSBs for a serving cell, or for selecting a reference SSB for a target cell from a plurality of SSBs for a target cell.

[0121] In the seventh aspect, receiving priority information, either alone or in combination with one or more of the first to sixth aspects, includes receiving downlink control information, media access control messages, radio resource control messages, system information, or handover commands that include priority information.

[0122] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the process 700 includes selecting a reference SSB for a serving cell from a plurality of SSBs for a serving cell, or a reference SSB for a target cell from a plurality of SSBs for a target cell, at least in part on UE capability information.

[0123] Figure 7 shows an exemplary block of process 700, but in some embodiments, process 700 may include additional blocks, fewer blocks, different blocks, or blocks configured differently from those shown in Figure 7. Additionally or alternatively, two or more blocks of process 700 may be performed in parallel.

[0124] Figure 8 shows an exemplary process 800 performed by, for example, a network node according to the present disclosure. The exemplary process 800 is an embodiment in which a network node (e.g., network node 110) performs an operation associated with identifying a reference SSB.

[0125] As shown in Figure 8, in some embodiments, process 800 may include transmitting configuration information indicating one or more reference synchronization signal blocks (SSBs) for a serving cell or one or more reference SSBs for a target cell (block 810). For example, a network node may transmit configuration information indicating one or more reference synchronization signal blocks (SSBs) for a serving cell or one or more reference SSBs for a target cell, as described above (for example, using the transmit component 1204 and / or communication manager 1206 shown in Figure 12).

[0126] As further shown in Figure 8, in some embodiments, process 800 may include transmitting instructions for performing a handover from a serving cell to a target cell, the handover being performed using one or more in-same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and subcarrier spacing (SCS) of the selection criterion SSB for the serving cell are the same as the center frequency and SCS of the selection criterion SSB for the target cell, respectively, or using one or more inter-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selection criterion SSB for the serving cell are different from the center frequency and SCS of the selection criterion SSB for the target cell (block 820). For example, a network node may transmit instructions to perform a handover from a serving cell to a target cell (for example, using the transmitting component 1204 and / or the communication manager 1206 shown in Figure 12), and the handover may be performed using one or more same-frequency measurement or handover conditions, at least in part on the fact that the center frequency and subcarrier spacing (SCS) of the selection criterion SSB for the serving cell are the same as the center frequency and SCS of the selection criterion SSB for the target cell, respectively, or using one or more different-frequency measurement or handover conditions, at least in part on the fact that the center frequency and SCS of the selection criterion SSB for the serving cell are different from the center frequency and SCS of the selection criterion SSB for the target cell.

[0127] Process 800 may include additional embodiments, such as any single embodiment or any combination of embodiments, described below and / or in relation to one or more other processes described elsewhere in this specification.

[0128] In the first embodiment, one or more reference SSBs for a serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and one or more reference SSBs for a target cell include a cell-defining SSB and one or more non-cell-defining SSBs.

[0129] In the second embodiment, either alone or in combination with the first embodiment, the selection criterion SSB for a serving cell corresponds to the SSB set in the serving cell measurement object, the SSB set in the bandwidth portion-specific serving cell measurement object if set, or the SSB set in the active bandwidth portion of the serving cell.

[0130] In the third embodiment, either alone or in combination with one or more of the first and second embodiments, the selection criterion SSB for the target cell corresponds to the SSB set in the first active bandwidth portion of the target cell, the SSB set in the serving cell measurement object of the target cell, the SSB set in the serving cell measurement object specific to the bandwidth portion of the target cell, if set, or the SSB set in the target cell measurement object of the serving cell.

[0131] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the process 800 includes transmitting priority information for selecting a selection criterion SSB for a serving cell from two or more SSBs for a serving cell, or for selecting a selection criterion SSB for a target cell from two or more SSBs for a target cell.

[0132] In the fifth aspect, transmitting priority information alone or in combination with one or more of the first to fourth aspects includes transmitting downlink control information, media access control messages, radio resource control messages, system information, or handover commands that include priority information.

[0133] Figure 8 shows an exemplary block of process 800, but in some embodiments, process 800 may include additional blocks, fewer blocks, different blocks, or blocks configured differently from those shown in Figure 8. Additionally or alternatively, two or more blocks of process 800 may be executed in parallel.

[0134] Figure 9 shows an exemplary process 900 performed by, for example, a UE according to the present disclosure. The exemplary process 900 is an embodiment in which a UE (e.g., UE120) performs an operation associated with identifying a reference SSB.

[0135] As shown in Figure 9, in some embodiments, process 900 may include identifying whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for a serving cell are the same as the center frequency and SCS of the reference SSB for an adjacent cell, respectively, for radio resource control (RRC) re-establishment (block 910). For example, the UE obtains the identification (using, for example, the communication manager 1106 shown in Figure 11) as described above, for radio resource control (RRC) re-establishment, whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for a serving cell are the same as the center frequency and SCS of the reference SSB for an adjacent cell, respectively.

[0136] As further shown in Figure 9, in some embodiments, process 900 may include initiating RRC re-establishment using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the adjacent cell, respectively (block 920). For example, the UE may initiate RRC re-establishment using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the adjacent cell, respectively, as described above (for example, using the communication manager 1106 shown in Figure 11), or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the adjacent cell, respectively.

[0137] Process 900 may include additional embodiments, such as any single embodiment or any combination of embodiments, described below and / or in relation to one or more other processes described elsewhere in this Specified Specification.

[0138] In the first embodiment, the UE is a capacity-reducing UE.

[0139] In the second embodiment, either alone or in combination with the first embodiment, the UE is configured with at least two SSBs for the serving cell or at least two SSBs for the adjacent cell.

[0140] In the third embodiment, either alone or in combination with one or more of the first and second embodiments, at least two SSBs for a serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and at least two SSBs for an adjacent cell include a cell-defining SSB and one or more non-cell-defining SSBs.

[0141] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the reference SSB for a serving cell corresponds to the cell-defining SSB of the serving cell, the SSB set in the active bandwidth portion of the serving cell, the SSB set in the serving cell measurement object, or, if set, a serving cell measurement object specific to the bandwidth portion.

[0142] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the reference SSB for an adjacent cell corresponds to a cell-defining SSB, a non-cell-defining SSB (if set) among one or more non-cell-defining SSBs, or an SSB set in the measurement object for an adjacent cell.

[0143] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the process 900 includes receiving priority information for selecting a reference SSB for a serving cell from a plurality of SSBs for a serving cell, or for selecting a reference SSB for an adjacent cell from a plurality of SSBs for an adjacent cell.

[0144] In the seventh aspect, receiving priority information, either alone or in combination with one or more of the first to sixth aspects, includes receiving downlink control information, media access control messages, radio resource control messages, system information, or handover commands that include priority information.

[0145] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the process 900 includes selecting a reference SSB for a serving cell from a plurality of SSBs for a serving cell, or a reference SSB for an adjacent cell from a plurality of SSBs for an adjacent cell, at least in part on UE capability information.

[0146] Figure 9 shows an exemplary block of process 900, but in some embodiments, process 900 may include additional blocks, fewer blocks, different blocks, or blocks configured differently from those shown in Figure 9. Additionally or alternatively, two or more blocks of process 900 may be executed in parallel.

[0147] Figure 10 shows an exemplary process 1000 performed by, for example, a network node according to the present disclosure. The exemplary process 1000 is an embodiment in which a network node (e.g., network node 110) performs an operation associated with identifying a reference SSB.

[0148] As shown in Figure 10, in some embodiments, process 1000 may include transmitting configuration information indicating one or more reference synchronization signal blocks (SSBs) for a serving cell or one or more reference SSBs for an adjacent cell (block 1010). For example, a network node may transmit configuration information indicating one or more reference synchronization signal blocks (SSBs) for a serving cell or one or more reference SSBs for an adjacent cell, as described above (for example, using the transmit component 1204 and / or communication manager 1206 shown in Figure 12).

[0149] As further shown in Figure 10, in some embodiments, process 1000 may include transmitting instructions to perform radio resource control (RRC) re-establishment, which is performed using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and subcarrier spacing (SCS) of the selection criterion SSB for the serving cell are the same as the center frequency and SCS of the selection criterion SSB for the adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selection criterion SSB for the serving cell are different from the center frequency and SCS of the selection criterion SSB for the adjacent cell, respectively (block 1020). For example, a network node may transmit instructions to perform radio resource control (RRC) re-establishment (for example, using the transmitting component 1204 and / or communication manager 1206 shown in Figure 12), which is performed using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and subcarrier spacing (SCS) of the selection criterion SSB for the serving cell are the same as the center frequency and SCS of the selection criterion SSB for the adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selection criterion SSB for the serving cell are different from the center frequency and SCS of the selection criterion SSB for the adjacent cell, respectively.

[0150] Process 1000 may include additional embodiments, such as any single embodiment or any combination of embodiments, which are described below and / or in relation to one or more other processes described elsewhere in this specification.

[0151] In the first embodiment, one or more reference SSBs for a serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and one or more reference SSBs for an adjacent cell include a cell-defining SSB and one or more non-cell-defining SSBs.

[0152] In the second embodiment, either alone or in combination with the first embodiment, the selection criterion SSB for a serving cell corresponds to the cell definition SSB of the serving cell, the SSB set in the active bandwidth portion of the serving cell, the SSB set in the serving cell measurement object, or, if set, a serving cell measurement object specific to the bandwidth portion.

[0153] In the third aspect, either alone or in combination with one or more of the first and second aspects, the selection criterion SSB for adjacent cells corresponds to a cell definition SSB, a non-cell definition SSB (if set) among one or more non-cell definition SSBs, or an SSB set in the measurement object for adjacent cells.

[0154] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, process 1000 includes transmitting priority information for selecting a selection criterion SSB for a serving cell from two or more SSBs for a serving cell, or for selecting a selection criterion SSB for an adjacent cell from two or more SSBs for an adjacent cell.

[0155] In the fifth aspect, transmitting priority information alone or in combination with one or more of the first to fourth aspects includes transmitting downlink control information, media access control messages, radio resource control messages, system information, or handover commands that include priority information.

[0156] Figure 10 shows an exemplary block of process 1000, but in some embodiments, process 1000 may include additional blocks, fewer blocks, different blocks, or blocks configured differently from those shown in Figure 10. Additionally or alternatively, two or more blocks of process 1000 may be executed in parallel.

[0157] Figure 11 shows an exemplary apparatus 1100 for wireless communication according to the present disclosure. The apparatus 1100 may be a UE, or a UE may include the apparatus 1100. In some embodiments, the apparatus 1100 includes a receiving component 1102, a transmitting component 1104, and / or a communications manager 1106 that can communicate with each other (e.g., via one or more buses and / or one or more other components). In some embodiments, the communications manager 1106 is the communications manager 140 described in relation to Figure 1. As shown, the apparatus 1100 may use the receiving component 1102 and the transmitting component 1104 to communicate with another apparatus 1108 of a UE or network node, such as a CU, DU, RU, or another base station.

[0158] In some embodiments, the device 1100 may be configured to perform one or more operations described herein in relation to Figures 5-6. Additionally or alternatively, the device 1100 may be configured to perform one or more processes described herein, such as process 700 in Figure 7, process 900 in Figure 9, or a combination thereof. In some embodiments, the device 1100 and / or one or more components shown in Figure 11 may include one or more components of the UE described in relation to Figure 2. Additionally or alternatively, one or more components shown in Figure 11 may be implemented within one or more components described in relation to Figure 2. Additionally or alternatively, one or more components of a set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-temporary computer-readable medium, which can be executed by a controller or processor to perform the function or operation of that component.

[0159] The receiving component 1102 may receive communications from the device 1108, such as reference signals, control information, data communications, or combinations thereof. The receiving component 1102 may provide the received communications to one or more other components of the device 1100. In some embodiments, the receiving component 1102 may perform signal processing on the received communications (especially filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding), and provide the processed signals to one or more other components of the device 1100. In some embodiments, the receiving component 1102 may include one or more antennas, modems, demodulators, MIMO detectors, receiving processors, controllers / processors, memory, or combinations thereof of the UE described in relation to Figure 2.

[0160] The transmitting component 1104 can transmit communications such as reference signals, control information, data communications, or combinations thereof to the device 1108. In some embodiments, one or more other components of the device 1100 may generate communications and provide the transmitting component 1104 with those generated communications for transmission to the device 1108. In some embodiments, the transmitting component 1104 may perform signal processing (in particular, filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or coding) on ​​the generated communications and transmit those processed signals to the device 1108. In some embodiments, the transmitting component 1104 may include one or more antennas, modems, modulators, transmitting MIMO processors, transmitting processors, controllers / processors, memory, or combinations thereof of the UE described in relation to Figure 2. In some embodiments, the transmitting component 1104 may be placed together with the receiving component 1102 in the transceiver.

[0161] The communication manager 1106 may support the operation of the receiving component 1102 and / or the transmitting component 1104. For example, the communication manager 1106 may receive information associated with configuring the receiving component 1102 to receive communications and / or the transmitting component 1104 to transmit communications. Additionally or alternatively, the communication manager 1106 may generate and / or provide control information to the receiving component 1102 and / or the transmitting component 1104 to control the receiving and / or transmission of communications.

[0162] The communication manager 1106 can determine whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, for handover between the serving cell and the target cell. The communication manager 1106 can initiate a handover from the serving cell to the target cell using one or more in-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, or using one or more inter-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the target cell, respectively.

[0163] The receiving component 1102 may receive priority information for selecting a reference SSB for a serving cell from multiple SSBs for a serving cell, or for selecting a reference SSB for a target cell from multiple SSBs for a target cell.

[0164] The communication manager 1106 may, at least in part, select a reference SSB for a serving cell from a plurality of SSBs for a serving cell, or a reference SSB for a target cell from a plurality of SSBs for a target cell, based on UE capability information.

[0165] The communication manager 1106 can determine whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for a serving cell are the same as the center frequency and SCS of the reference SSB for an adjacent cell, respectively, in order to re-establish Radio Resource Control (RRC). The communication manager 1106 may initiate RRC re-establishment using one or more intra-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are the same as the center frequency and SCS of the reference SSB for an adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are different from the center frequency and SCS of the reference SSB for an adjacent cell, respectively.

[0166] The receiving component 1102 may receive priority information for selecting a reference SSB for a serving cell from multiple SSBs for the serving cell, or for selecting a reference SSB for an adjacent cell from multiple SSBs for adjacent cells. The communication manager 1106 may, at least in part, select a reference SSB for a serving cell from multiple SSBs for the serving cell, or for an adjacent cell from multiple SSBs for adjacent cells, based on UE capability information.

[0167] The number and arrangement of components shown in Figure 11 are provided as an example. In practice, there may be additional components, fewer components, different components, or components configured differently from those shown in Figure 11. Furthermore, two or more components shown in Figure 11 may be implemented within a single component, or a single component shown in Figure 11 may be implemented as multiple distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 11 may perform one or more functions that are described as being performed by another set of components shown in Figure 11.

[0168] Figure 12 is a diagram of an exemplary apparatus 1200 for wireless communication according to the present disclosure. The apparatus 1200 may be a network node, or a network node may include the apparatus 1200. In some embodiments, the apparatus 1200 includes a receiving component 1202, a transmitting component 1204, and / or a communications manager 1206 that can communicate with each other (e.g., via one or more buses and / or one or more other components). In some embodiments, the communications manager 1206 is the communications manager 150 described in relation to Figure 1. As shown in the figure, the apparatus 1200 may use the receiving component 1202 and the transmitting component 1204 to communicate with another apparatus 1208, such as a UE or a network node (such as a CU, DU, RU, or another base station).

[0169] In some embodiments, the device 1200 may be configured to perform one or more operations described herein in relation to Figures 5-6. Additionally or alternatively, the device 1200 may be configured to perform one or more processes described herein, such as process 800 in Figure 8, process 1000 in Figure 10, or a combination thereof. In some embodiments, the device 1200 and / or one or more components shown in Figure 12 may include one or more components of the network node described in relation to Figure 2. Additionally or alternatively, one or more components shown in Figure 12 may be implemented within one or more components described in relation to Figure 2. Additionally or alternatively, one or more components of a set of components may be implemented at least partially as software stored in memory. For example, a component (or a portion of a component) may be implemented as instructions or code stored in a non-temporary computer-readable medium, which can be executed by a controller or processor to perform the function or operation of that component.

[0170] The receiving component 1202 may receive communications from the device 1208, such as reference signals, control information, data communications, or combinations thereof. The receiving component 1202 may provide the received communications to one or more other components of the device 1200. In some embodiments, the receiving component 1202 may perform signal processing on the received communications (e.g., filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding), and provide the processed signals to one or more other components of the device 1200. In some embodiments, the receiving component 1202 may include one or more antennas, modems, demodulators, MIMO detectors, receiving processors, controllers / processors, memory, or combinations thereof of the network nodes described in relation to Figure 2. In some embodiments, the receiving component 1202 and / or the transmitting component 1204 may include, or may be included in, a network interface. The network interface may be configured to acquire and / or output signals for the device 1200 via one or more communication links, such as a backhaul link, a midhaul link, and / or a fronthaul link.

[0171] The transmitting component 1204 can transmit communications such as reference signals, control information, data communications, or combinations thereof to the device 1208. In some embodiments, one or more other components of the device 1200 may generate communications and provide these generated communications to the transmitting component 1204 for transmission to the device 1208. In some embodiments, the transmitting component 1204 may perform signal processing (in particular, filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or coding) on ​​the generated communications and transmit these processed signals to the device 1208. In some embodiments, the transmitting component 1204 may include one or more antennas, modems, modulators, transmitting MIMO processors, transmitting processors, controllers / processors, memory, or combinations thereof of the network nodes described in relation to Figure 2. In some embodiments, the transmitting component 1204 may be placed together with the receiving component 1202 in a transceiver.

[0172] The communication manager 1206 may support the operation of the receiving component 1202 and / or the transmitting component 1204. For example, the communication manager 1206 may receive information associated with configuring the receiving component 1202 to receive communications and / or the transmitting component 1204 to transmit communications. Additionally or alternatively, the communication manager 1206 may generate and / or provide control information to the receiving component 1202 and / or the transmitting component 1204 to control the receiving and / or transmission of communications.

[0173] The transmitting component 1204 may transmit configuration information indicating one or more reference synchronization signal blocks (SSBs) for the serving cell or one or more reference SSBs for the target cell. The transmitting component 1204 may also transmit instructions for performing a handover from the serving cell to the target cell, which is performed using one or more same-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and subcarrier spacing (SCS) of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the target cell, respectively, or using one or more different-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the target cell, respectively.

[0174] The transmitting component 1204 may transmit priority information for selecting a selection criterion SSB for a serving cell from two or more SSBs for a serving cell, or for selecting a selection criterion SSB for a target cell from two or more SSBs for a target cell.

[0175] The transmitting component 1204 may transmit configuration information indicating one or more reference synchronization signal blocks (SSBs) for a serving cell or one or more reference SSBs for an adjacent cell. The transmitting component 1204 may also transmit instructions for performing radio resource control (RRC) re-establishment, which is performed using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and subcarrier spacing (SCS) of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively, or using one or more cross-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively.

[0176] The transmitting component 1204 may transmit priority information for selecting a selection criterion SSB for a serving cell from two or more SSBs for a serving cell, or for selecting a selection criterion SSB for an adjacent cell from two or more SSBs for an adjacent cell.

[0177] The number and arrangement of components shown in Figure 12 are provided as an example. In practice, there may be additional components, fewer components, different components, or components configured differently from those shown in Figure 12. Furthermore, two or more components shown in Figure 12 may be implemented within a single component, or a single component shown in Figure 12 may be implemented as multiple distributed components. Additionally or alternatively, a set of (one or more) components shown in Figure 12 may perform one or more functions that are described as being performed by another set of components shown in Figure 12.

[0178] The following provides an overview of some aspects of this disclosure.

[0179] Embodiment 1: A method of wireless communication performed by a user device (UE), comprising: identifying whether the center frequency and subcarrier spacing (SCS) of a reference synchronous signal block (SSB) for a serving cell are the same as the center frequency and SCS of a reference SSB for a target cell, respectively; and initiating a handover from a serving cell to a target cell using one or more in-frequency measurement or in-frequency handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for a target cell, respectively; or using one or more out-of-frequency measurement or out-of-frequency handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for a target cell, respectively.

[0180] Embodiment 2: The method according to Embodiment 1, wherein the UE is a capacity-reducing UE.

[0181] Embodiment 3: The method according to Embodiment 1 or 2, wherein the UE is configured using at least two SSBs for the serving cell or at least two SSBs for the target cell.

[0182] Embodiment 4: The method according to Embodiment 3, wherein at least two SSBs for a serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and at least two SSBs for a target cell include a cell-defining SSB and one or more non-cell-defining SSBs.

[0183] Embodiment 5: The method according to any one of Embodiments 1 to 4, wherein the reference SSB for the serving cell corresponds to the SSB set in the serving cell measurement object, the SSB set in the bandwidth portion-specific serving cell measurement object if set, or the SSB set in the active bandwidth portion of the serving cell.

[0184] Embodiment 6: The method according to any one of Embodiments 1 to 5, wherein the reference SSB for the target cell corresponds to the SSB set in the first active bandwidth portion of the target cell, the SSB set in the serving cell measurement object of the target cell, the SSB set in the serving cell measurement object specific to the bandwidth portion of the target cell, or the SSB set in the target cell measurement object of the serving cell, if set.

[0185] Embodiment 7: The method according to any one of embodiments 1 to 6, further comprising receiving priority information for selecting a reference SSB for a serving cell from a plurality of SSBs for a serving cell, or for selecting a reference SSB for a target cell from a plurality of SSBs for a target cell.

[0186] Embodiment 8: The method according to Embodiment 7, wherein receiving priority information includes receiving downlink control information, a media access control message, a wireless resource control message, system information, or a handover command, which includes priority information.

[0187] Embodiment 9: The method according to any one of embodiments 1 to 8, further comprising selecting a reference SSB for a serving cell from a plurality of SSBs for a serving cell, or a reference SSB for a target cell from a plurality of SSBs for a target cell, at least in part, based on UE capability information.

[0188] Embodiment 10: A method of wireless communication performed by a network node, comprising transmitting configuration information indicating one or more reference synchronization signal blocks (SSBs) for a serving cell or one or more reference SSBs for a target cell, and transmitting instructions for performing a handover from a serving cell to a target cell, wherein the handover is performed using one or more in-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and subcarrier spacing (SCS) of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the target cell, respectively, or using one or more inter-frequency measurement or handover conditions, at least partially based on the fact that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the target cell, respectively.

[0189] Embodiment 11: The method of Embodiment 10, wherein one or more reference SSBs for a serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and one or more reference SSBs for a target cell include a cell-defining SSB and one or more non-cell-defining SSBs.

[0190] Embodiment 12: The method according to Embodiment 10 or 11, wherein the selection criterion SSB for the serving cell corresponds to the SSB set in the serving cell measurement object, the SSB set in the bandwidth portion-specific serving cell measurement object if set, or the SSB set in the active bandwidth portion of the serving cell.

[0191] Embodiment 13: The method according to any one of Embodiments 10 to 12, wherein the selection criterion SSB for the target cell corresponds to the SSB set in the first active bandwidth portion of the target cell, the SSB set in the serving cell measurement object of the target cell, the SSB set in the serving cell measurement object specific to the bandwidth portion of the target cell, or the SSB set in the target cell measurement object of the serving cell, if set.

[0192] Embodiment 14: The method according to any one of Embodiments 10 to 13, further comprising transmitting priority information for selecting a selection criterion SSB for a serving cell from two or more SSBs for a serving cell, or for selecting a selection criterion SSB for a target cell from two or more SSBs for a target cell.

[0193] Embodiment 15: The method according to Embodiment 14, wherein transmitting priority information includes transmitting downlink control information, a media access control message, a radio resource control message, system information, or a handover command, which includes priority information.

[0194] Embodiment 16: A method for wireless communication performed by a user device (UE), comprising: identifying whether the center frequency and subcarrier spacing (SCS) of a reference synchronous signal block (SSB) for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, respectively; and initiating RRC re-establishment using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are the same as the center frequency and SCS of a reference SSB for an adjacent cell, respectively; or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for a serving cell are different from the center frequency and SCS of a reference SSB for an adjacent cell, respectively.

[0195] Embodiment 17: The method according to Embodiment 16, wherein the UE is a capacity-reducing UE.

[0196] Embodiment 18: The method according to Embodiment 16 or 17, wherein the UE is configured using at least two SSBs for a serving cell or at least two SSBs for adjacent cells.

[0197] Embodiment 19: The method of Embodiment 18, wherein at least two SSBs for a serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and at least two SSBs for an adjacent cell include a cell-defining SSB and one or more non-cell-defining SSBs.

[0198] Embodiment 20: The method according to any one of Embodiments 16 to 19, wherein the reference SSB for a serving cell corresponds to the cell definition SSB of the serving cell, the SSB set in the active bandwidth portion of the serving cell, the SSB set in the serving cell measurement object, or, if set, the bandwidth portion-specific serving cell measurement object.

[0199] Embodiment 21: The method according to any one of Embodiments 16 to 20, wherein the reference SSB for adjacent cells corresponds to a cell-defining SSB, if set, one of one or more non-cell-defining SSBs, or an SSB set in a measurement object for adjacent cells.

[0200] Embodiment 22: The method according to any one of embodiments 16 to 21, further comprising receiving priority information for selecting a reference SSB for a serving cell from a plurality of SSBs for a serving cell, or for selecting a reference SSB for an adjacent cell from a plurality of SSBs for an adjacent cell.

[0201] Embodiment 23: The method according to Embodiment 22, wherein receiving priority information includes receiving downlink control information, a media access control message, a wireless resource control message, system information, or a handover command, which includes priority information.

[0202] Embodiment 24: The method according to any one of embodiments 16 to 23, further comprising selecting a reference SSB for a serving cell from a plurality of SSBs for a serving cell, or a reference SSB for an adjacent cell from a plurality of SSBs for an adjacent cell, at least in part, based on UE capability information.

[0203] Embodiment 25: A method of wireless communication performed by a network node, comprising transmitting configuration information indicating one or more reference synchronization signal blocks (SSBs) for a serving cell or one or more reference SSBs for an adjacent cell, and transmitting instructions for performing radio resource control (RRC) re-establishment, wherein the RRC re-establishment is performed using one or more in-same-frequency measurements, at least on the basis that the center frequency and subcarrier spacing (SCS) of the selected reference SSB for the serving cell are the same as the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively, or using one or more inter-frequency measurements, at least on the basis that the center frequency and SCS of the selected reference SSB for the serving cell are different from the center frequency and SCS of the selected reference SSB for the adjacent cell, respectively.

[0204] Embodiment 26: The method of Embodiment 25, wherein one or more reference SSBs for a serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and one or more reference SSBs for an adjacent cell include a cell-defining SSB and one or more non-cell-defining SSBs.

[0205] Embodiment 27: The method according to Embodiment 25 or 26, wherein the selection criterion SSB for a serving cell corresponds to the cell definition SSB of the serving cell, the SSB set in the active bandwidth portion of the serving cell, the SSB set in the serving cell measurement object, or, if set, the bandwidth portion-specific serving cell measurement object.

[0206] Embodiment 28: The method according to any one of Embodiments 25 to 27, wherein the selection criterion SSB for adjacent cells corresponds to a cell definition SSB, if set, one of one or more non-cell definition SSBs, or an SSB set in a measurement object for adjacent cells.

[0207] Embodiment 29: The method according to any one of embodiments 25 to 28, further comprising transmitting priority information for selecting a selection criterion SSB for a serving cell from two or more SSBs for a serving cell, or for selecting a selection criterion SSB for an adjacent cell from two or more SSBs for an adjacent cell.

[0208] Embodiment 30: The method according to Embodiment 29, wherein transmitting priority information includes transmitting downlink control information, a media access control message, a wireless resource control message, system information, or a handover command, which includes priority information.

[0209] Embodiment 31: A device for wireless communication in a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory, which can be executed by the processor to cause the device to perform one or more of the methods described in Embodiments 1 to 30.

[0210] Embodiment 32: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, wherein the memory comprises instructions executable by the one or more processors to cause the device to perform one or more of the methods described in Embodiments 1 to 30.

[0211] Embodiment 33: A device for wireless communication, comprising a memory and one or more processors coupled to the memory, wherein one or more processors are configured to carry out the method according to one or more of Embodiments 1 to 30.

[0212] Embodiment 34: An apparatus for wireless communication, comprising at least one means for carrying out one or more methods according to Embodiments 1 to 30.

[0213] Embodiment 35: A non-temporary computer-readable medium storing code for wireless communication, wherein the code comprises instructions that can be executed by a processor to carry out the method described in one or more embodiments 1 to 30.

[0214] Embodiment 36: A non-temporary computer-readable medium storing a set of instructions for wireless communication, wherein the set of instructions comprises one or more instructions, and when one or more instructions are executed by one or more processors of the device, the device causes the device to perform one or more of the methods described in Embodiments 1 to 30.

[0215] The foregoing disclosures are illustrative and explanatory, but are not intended to be exhaustive or to limit the forms to those disclosed. Modifications and variations may be made in light of the foregoing disclosures or derived from the practice of the forms.

[0216] Where used herein, the term “components” is intended to be interpreted broadly as hardware and / or combinations of hardware and software. Software should be interpreted broadly, including, but more specifically, as instructions, instruction sets, code, code segments, program code, programs, subprograms, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, and / or functions, whether referred to by names such as software, firmware, middleware, microcode, or hardware description language. Where used herein, a processor is implemented in hardware and / or combinations of hardware and software. It will become clear that the systems and / or methods described herein can be implemented in various forms of hardware and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not limited to their embodiments. Therefore, it should be understood that the operation and behavior of systems and / or methods are described herein without reference to specific software code, and that software and hardware can be designed to implement systems and / or methods based at least partially on the descriptions herein.

[0217] As used herein, “meeting the threshold” may mean, depending on the context, that a value is greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, or not equal to the threshold.

[0218] Even if certain combinations of features are enumerated in the claims and / or disclosed herein, those combinations are not intended to limit the disclosure of various embodiments. Many of these features can be combined in ways not specifically enumerated in the claims and / or disclosed herein. The disclosure of various embodiments includes each dependent claim in combination with any other claim in the set of claims. Where used herein, the phrase "at least one of" the list of items refers to any combination of those items, including a single member. As an example, “at least one of a, b, or c” is intended to encompass a, b, c, a+b, a+c, b+c, and a+b+c, as well as any combination having multiple identical elements (e.g., a+a, a+a+a, a+a+b, a+a+c, a+b+b, a+c+c, b+b, b+b+b, b+b+c, c+c, and c+c+c, or any other sequence of a, b, and c).

[0219] None of the elements, actions, or commands used herein should be construed as essential or mandatory unless expressly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more.” Additionally, as used herein, the article “the” is intended to include one or more items referred to in relation to the article “the” and may be used interchangeably with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items and may be used interchangeably with “one or more.” When only one item is intended, the phrase “only one” or similar words are used. Also, as used herein, terms such as “has,” “have,” and “having” are intended to be open-ended terms that do not limit the elements they modify (for example, an element that “has” A may also have B). Furthermore, unless otherwise specified, the phrase "based on" is intended to mean "at least partially based on." Also, as used herein, the term "or" is intended to be inclusive when used in a series, and may be used interchangeably with "and / or" unless otherwise specified (for example, when used in combination with "either" or "only one of").

Claims

1. User equipment (UE) for wireless communication, One or more memory devices, One or more processors coupled to the one or more memory, The memory comprises, and the one or more memory contains instructions that can be executed by the one or more processors, and the UE contains, For handover between a serving cell and a target cell, the system identifies whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively. The handover from the serving cell to the target cell is initiated using one or more in-frequency measurement or in-frequency handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the target cell, respectively, or using one or more inter-frequency measurement or inter-frequency handover conditions, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the target cell, respectively. Equipped with executable instructions, UE.

2. The UE according to claim 1, wherein the UE is a capacity-reducing UE.

3. The UE according to claim 1, wherein the UE is configured using at least two SSBs for the serving cell or at least two SSBs for the target cell.

4. The UE according to claim 3, wherein the at least two SSBs for the serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and the at least two SSBs for the target cell include a cell-defining SSB and one or more non-cell-defining SSBs.

5. The UE according to claim 1, wherein the reference SSB for the serving cell corresponds to an SSB set in a serving cell measurement object, an SSB set in a bandwidth portion-specific serving cell measurement object if set, or an SSB set in the active bandwidth portion of the serving cell.

6. The UE according to claim 1, wherein the reference SSB for the target cell corresponds to an SSB set in a first active bandwidth portion of the target cell, an SSB set in the serving cell measurement object of the target cell, an SSB set in a serving cell measurement object specific to the bandwidth portion of the target cell, or an SSB set in the target cell measurement object of the serving cell.

7. The UE according to claim 1, further comprising instructions executable by the one or more processors, which cause the UE to receive priority information for selecting the reference SSB for the serving cell from a plurality of SSBs for the serving cell, or for selecting the reference SSB for the target cell from a plurality of SSBs for the target cell.

8. The UE according to claim 7, wherein the instruction executable to cause the UE to receive the priority information is executable to cause the UE to receive downlink control information, a media access control message, a wireless resource control message, system information, or a handover command, which includes the priority information.

9. The UE according to claim 1, further comprising instructions executable by the one or more processors, which cause the UE to select, at least in part, the reference SSB for the serving cell from a plurality of SSBs for the serving cell, or the reference SSB for the target cell from a plurality of SSBs for the target cell.

10. A network node for wireless communication, One or more memory devices, One or more processors coupled to the one or more memory, The memory comprises, and the one or more memory contains instructions that can be executed by the one or more processors, and the network node, It transmits configuration information indicating one or more reference synchronization signal blocks (SSBs) for the serving cell or one or more reference SSBs for the target cell. To transmit instructions for performing a handover from the serving cell to the target cell. The system provides executable instructions such that the handover is performed using one or more in-frequency measurement or in-frequency handover conditions, at least partially based on the fact that the center frequency and subcarrier spacing (SCS) of the selection criterion SSB for the serving cell are the same as the center frequency and SCS of the selection criterion SSB for the target cell, respectively, or using one or more different-frequency measurement or different-frequency handover conditions, at least partially based on the fact that the center frequency and SCS of the selection criterion SSB for the serving cell are different from the center frequency and SCS of the selection criterion SSB for the target cell, respectively. Network node.

11. The network node according to claim 10, wherein the one or more reference SSBs for the serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and the one or more reference SSBs for the target cell include a cell-defining SSB and one or more non-cell-defining SSBs.

12. The network node according to claim 10, wherein the selection criterion SSB for the serving cell corresponds to an SSB set in a serving cell measurement object, an SSB set in a bandwidth portion-specific serving cell measurement object if set, or an SSB set in the active bandwidth portion of the serving cell.

13. The network node according to claim 10, wherein the selection criterion SSB for the target cell corresponds to an SSB set in a first active bandwidth portion of the target cell, an SSB set in the serving cell measurement object of the target cell, an SSB set in a serving cell measurement object specific to the bandwidth portion of the target cell, or an SSB set in the target cell measurement object of the serving cell.

14. The network node according to claim 10, wherein the one or more memories further comprises instructions executable by the one or more processors, causing the network node to transmit priority information for selecting the selection criterion SSB for the serving cell from two or more SSBs for the serving cell, or for selecting the selection criterion SSB for the target cell from two or more SSBs for the target cell.

15. The network node according to claim 14, wherein the instruction, which is executable to cause the network node to transmit the priority information, is executable to cause the network node to transmit downlink control information, a media access control message, a radio resource control message, system information, or a handover command, which includes the priority information.

16. A UE for wireless communication, One or more memory devices, One or more processors coupled to the one or more memory, The memory comprises, and the one or more memory contains instructions that can be executed by the one or more processors, and the UE contains, To re-establish Radio Resource Control (RRC), identify whether the center frequency and subcarrier spacing (SCS) of the reference synchronous signal block (SSB) for a serving cell are the same as the center frequency and SCS of the reference SSB for an adjacent cell, respectively. RRC re-establishment is initiated using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are the same as the center frequency and SCS of the reference SSB for the adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the reference SSB for the serving cell are different from the center frequency and SCS of the reference SSB for the adjacent cell, respectively. Equipped with executable instructions, UE.

17. The UE according to claim 16, wherein the UE is a capacity-reducing type UE.

18. The UE according to claim 16, wherein the UE is configured using at least two SSBs for the serving cell or at least two SSBs for the adjacent cell.

19. The UE according to claim 18, wherein the at least two SSBs for the serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and the at least two SSBs for the adjacent cell include a cell-defining SSB and one or more non-cell-defining SSBs.

20. The UE according to claim 16, wherein the reference SSB for the serving cell corresponds to the cell definition SSB of the serving cell, the SSB set in the active bandwidth portion of the serving cell, the SSB set in the serving cell measurement object, or, if set, a serving cell measurement object specific to the bandwidth portion.

21. The UE according to claim 16, wherein the reference SSB for the adjacent cell corresponds to a cell-defining SSB, if set, one of one or more non-cell-defining SSBs, or an SSB set in the measurement object for the adjacent cell.

22. The UE according to claim 16, further comprising instructions executable by the one or more processors, which cause the UE to receive priority information for selecting the reference SSB for the serving cell from a plurality of SSBs for the serving cell, or for selecting the reference SSB for the adjacent cell from a plurality of SSBs for the adjacent cell.

23. The UE according to claim 22, wherein the instruction that can cause the UE to receive the priority information is also executable that causes the UE to receive downlink control information, a media access control message, a wireless resource control message, system information, or a handover command, which includes the priority information.

24. The UE according to claim 16, further comprising instructions executable by the one or more processors, which cause the UE to select, at least in part, the reference SSB for the serving cell from a plurality of SSBs for the serving cell, or the reference SSB for the adjacent cell from a plurality of SSBs for the adjacent cell.

25. A network node for wireless communication, One or more memory devices, One or more processors coupled to the one or more memory, The memory comprises, and the one or more memory contains instructions that can be executed by the one or more processors, and the network node, It transmits configuration information indicating one or more reference synchronization signal blocks (SSBs) for a serving cell or one or more reference SSBs for an adjacent cell. Send instructions to perform Radio Resource Control (RRC) re-establishment. The system provides executable instructions such that the RRC re-establishment is performed using one or more in-same-frequency measurements, at least partially based on the fact that the center frequency and subcarrier spacing (SCS) of the selection criterion SSB for the serving cell are the same as the center frequency and SCS of the selection criterion SSB for the adjacent cell, respectively, or using one or more inter-frequency measurements, at least partially based on the fact that the center frequency and SCS of the selection criterion SSB for the serving cell are different from the center frequency and SCS of the selection criterion SSB for the adjacent cell, respectively. Network node.

26. The network node according to claim 25, wherein the one or more reference SSBs for the serving cell include a cell-defining SSB and one or more non-cell-defining SSBs, and the one or more reference SSBs for the adjacent cell include a cell-defining SSB and one or more non-cell-defining SSBs.

27. The network node according to claim 25, wherein the selection criterion SSB for the serving cell corresponds to the cell definition SSB of the serving cell, the SSB set in the active bandwidth portion of the serving cell, the SSB set in the serving cell measurement object, or, if set, a serving cell measurement object specific to the bandwidth portion.

28. The network node according to claim 25, wherein the selection criterion SSB for the adjacent cell corresponds to a cell definition SSB, if set, one of one or more non-cell definition SSBs, or an SSB set in the measurement object for the adjacent cell.

29. The network node according to claim 25, wherein the one or more memories further comprises instructions executable by the one or more processors, causing the network node to transmit priority information for selecting the selection criterion SSB for the serving cell from two or more SSBs for the serving cell, or for selecting the selection criterion SSB for the adjacent cell from two or more SSBs for the adjacent cell.

30. The network node according to claim 29, wherein the instruction, which is executable to cause the network node to transmit the priority information, is executable to cause the network node to transmit downlink control information, a media access control message, a radio resource control message, system information, or a handover command, which includes the priority information.

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