Fast ca / dc reconfiguration in l1 / l2 based inter-cell mobility

Abstract

Aspects of the present disclosure provide a technique for wireless communications by a user equipment (UE). The UE receives signaling of a plurality of candidate target physical cell identifiers (PCIs) of at least one candidate target cell that supports physical (PHY) layer or medium access control (MAC) layer mobility signaling. The UE participates in a handover procedure to a target cell associated with a selected one or more of the candidate target PCIs based on the PHY layer or MAC layer mobility signaling. The UE modifies a configuration for at least one cell group (CG), wherein one or more of the candidate target PCIs are associated with a component carrier (CC) of the at least one CG.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to U.S. Nonprovisional Application No. 17 / 372,143, filed July 9, 2021, and claims the benefit and priority to U.S. Provisional Patent Application No. 63 / 051,361, filed July 13, 2020, which are incorporated herein by reference in their entirety. Technical Field

[0003] Various aspects of this disclosure relate to wireless communications, and more specifically, to techniques for cell reconfiguration in systems supporting inter-cell mobility based on physical layer (PHY, layer 1 or L1) or medium access control (MAC, layer 2 or L2) 1 / layer 2 (L1 / L2) signaling. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. These wireless communication systems can use multiple access technologies that support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access systems include 3GPP Long Term Evolution (LTE) systems, LTE-A Advanced systems, Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, among others.

[0005] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different wireless devices to communicate at the city, country, region, and even global levels. New Radio (NR) (e.g., fifth generation (5G)) is an example of an emerging telecommunications standard. NR is a set of enhancements to the LTE mobile standard released by 3GPP. NR is designed to: better support mobile broadband internet access by improving spectrum efficiency, reducing costs, improving service, using new spectrum, and better integrating with other open standards using OFDMA with cyclic prefix (CP) on both the downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0006] However, with the continued growth in demand for mobile broadband access, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunications standards that employ these technologies. Summary of the Invention

[0007] The systems, methods, and apparatus of this disclosure each have several aspects, none of which individually bears responsibility for their desired properties. Upon consideration of this discussion, and especially after reading the section entitled "Detailed Description," it will be understood how the features of this disclosure provide advantages, including improved and desired techniques for cell reconfiguration in systems supporting inter-cell mobility based on Physical Layer (PHY, Layer 1 or L1) or Medium Access Control (MAC, Layer 2 or L2) 1 / Layer 2 (L1 / L2) signaling.

[0008] Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a user equipment (UE). This method typically includes: receiving signaling configuring at least one candidate target cell with multiple candidate target physical cell identifiers (PCIs) supporting PHY or MAC layer mobility signaling; participating in a handover process for a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on the PHY or MAC layer mobility signaling; and modifying the configuration for at least one cell group (CG), wherein one or more candidate target PCIs are associated with a component carrier (CC) of at least one CG.

[0009] Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a network entity. This method typically includes: sending signaling to a UE configuring a plurality of candidate target PCIs of at least one candidate target cell supporting PHY or MAC layer mobility signaling; participating in a handover process of the UE to a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on the PHY or MAC layer mobility signaling; and modifying the configuration for at least one CG, wherein one or more candidate target PCIs are associated with a CC of at least one CG.

[0010] Some aspects provide an apparatus for wireless communication by a UE. The apparatus typically includes at least one processor and memory, configured to: receive signaling of a plurality of candidate target PCIs configured to support mobility signaling of at least one candidate target cell at the PHY or MAC layer; participate in a handover process of a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on the PHY or MAC layer mobility signaling; and modify a configuration for at least one CG, wherein one or more candidate target PCIs are associated with a CC of at least one CG.

[0011] Some aspects provide an apparatus for wireless communication by a network entity. The apparatus typically includes at least one processor and memory, configured to: transmit signaling to a UE configuring a plurality of candidate target PCIs of at least one candidate target cell supporting PHY-layer or MAC-layer mobility signaling; participate in a handover process of the UE to a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on the PHY-layer or MAC-layer mobility signaling; and modify a configuration for at least one CG, wherein one or more candidate target PCIs are associated with a CC of at least one CG.

[0012] Some aspects provide an apparatus for wireless communication by a UE. The apparatus typically includes: components for receiving signaling of a plurality of candidate target PCIs configured to support mobility signaling of at least one candidate target cell at the PHY or MAC layer; components for participating in a handover process of a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on the PHY or MAC layer mobility signaling; and components for modifying a configuration for at least one CG, wherein one or more candidate target PCIs are associated with a CC of at least one CG.

[0013] Some aspects provide an apparatus for wireless communication by a network entity. The apparatus typically includes: components for transmitting signaling to a UE configuring a plurality of candidate target PCIs of at least one candidate target cell supporting PHY or MAC layer mobility signaling; components for participating in a handover process of the UE to a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on the PHY or MAC layer mobility signaling; and components for modifying a configuration for at least one CG, wherein one or more candidate target PCIs are associated with a CC of at least one CG.

[0014] Certain aspects of the subject matter described in this disclosure can be implemented in a computer-readable medium having computer-executable code thereon for wireless communication by a UE. The computer-readable medium includes: code for receiving signaling for configuring at least one candidate target cell with a plurality of candidate target PCIs supporting PHY or MAC layer mobility signaling; code for participating in a handover process of a target cell associated with one or more selected candidate target PCIs among the candidate target PCIs based on the PHY or MAC layer mobility signaling; and code for modifying the configuration for at least one CG, wherein one or more candidate target PCIs are associated with a CC of at least one CG.

[0015] Certain aspects of the subject matter described in this disclosure can be implemented in a computer-readable medium having stored thereon computer-executable code for wireless communication by a network entity. The computer-readable medium includes: code for sending signaling to a UE to configure a plurality of candidate target PCIs of at least one candidate target cell supporting PHY or MAC layer mobility signaling; code for participating in a handover process of the UE to a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on the PHY or MAC layer mobility signaling; and code for modifying the configuration for at least one CG, wherein one or more candidate target PCIs are associated with a CC of at least one CG.

[0016] To achieve the foregoing and related objectives, one or more aspects include the features fully described below and specifically pointed out in the claims. The following description and drawings set forth certain illustrative features of one or more aspects in detail. However, these features indicate several of the various ways in which the principles of each aspect can be used. Attached Figure Description

[0017] To gain a more detailed understanding of the foregoing features of this disclosure, reference can be made to various aspects for a more specific description of the brief overview given above, some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain aspects of this disclosure, and the description may relate to other equivalent aspects.

[0018] Figure 1 This is a block diagram that conceptually illustrates an example wireless communication network according to certain aspects of this disclosure.

[0019] Figure 2 This is a block diagram that conceptually illustrates an example base station (BS) and an example user equipment (UE) according to certain aspects of this disclosure.

[0020] Figure 3A These are examples of frame formats for certain wireless communication systems (e.g., New Radio (NR)) according to certain aspects of this disclosure.

[0021] Figure 3B This describes an example of a synchronization signal block (SSB) transmitted using different beams according to certain aspects of this disclosure.

[0022] Figure 4 This describes an example wireless communication system architecture based on certain aspects of this disclosure.

[0023] Figure 5 and Figure 6 This section describes example scenarios in which various aspects of this disclosure can be practiced.

[0024] Figure 7This is a flowchart illustrating example operations for wireless communication by a UE according to certain aspects of this disclosure.

[0025] Figure 8 This is a flowchart illustrating example operations for wireless communication by a network entity in accordance with certain aspects of this disclosure.

[0026] Figure 9 The description of certain aspects of this disclosure may include communication devices with various components configured to perform the operations of the techniques disclosed herein.

[0027] Figure 10 The description of certain aspects of this disclosure may include communication devices with various components configured to perform the operations of the techniques disclosed herein.

[0028] For ease of understanding, the same reference numerals are used where possible to indicate the same elements common to these figures. Unless otherwise specified, it is envisioned that elements disclosed in one aspect can be advantageously used in other aspects. Detailed Implementation

[0029] This disclosure provides apparatus, methods, processing systems, and computer-readable media for techniques to reconfigure cell groups in systems supporting inter-cell mobility based on physical layer (PHY, layer 1 or L1) or media access control (MAC, layer 2 or L2) 1 / layer 2 (L1 / L2) signaling. For example, the techniques given herein can be applied to establish, update, and / or release cell groups (CGs) in carrier aggregation (CA) and / or dual connectivity (DC) configurations.

[0030] The following description provides examples of inter-cell mobility in wireless communication systems. Changes may be made to the function and arrangement of the elements discussed without departing from the scope of this disclosure. Various processes or components may be omitted, substituted, or added as appropriate in the various examples. For example, the described methods may be performed in a different order than that described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined with those in other examples. For example, an apparatus or a method may be implemented using any number of aspects set forth herein. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods implemented using structures, functions, or structures and functions other than or different from those set forth herein. It should be understood that any aspect of the disclosure herein may be embodied by one or more elements of the claims.

[0031] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific Radio Access Technology (RAT) and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, subcarrier, frequency channel, frequency modulation, subband, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks with different RATs.

[0032] The techniques described herein can be used in a variety of wireless networks and radio technologies. While this document may use terms commonly associated with third-generation (3G), 4G, and / or new radio (e.g., 5G New Radio (NR)) wireless technologies to describe aspects of this disclosure, these aspects can be applied to communication systems based on other generations.

[0033] NR access can support a variety of wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth, millimeter wave (mmW), massive machine-type communication (mMTC) targeting non-backward-compatible MTC technology, and / or mission-critical communication targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services can also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. Furthermore, these services can coexist in the same subframe.

[0034] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc., based on frequency / wavelength. In 5G NR, two initial operating bands have been designated as frequency range markings FR1 (410MHz–7.125GHz) and FR2 (24.25GHz–52.6GHz). The frequencies between FR1 and FR2 are generally referred to as the intermediate frequency band (IF). Although a portion of FR1 is greater than 6GHz, in various documents and articles, FR1 is often (interchangeably) referred to as the “sub-6GHz” band. Similar naming issues sometimes arise regarding FR2; although it differs from the extremely high frequency (EHF) band (30GHz–300GHz), it is often (interchangeably) referred to in documents and articles as the “millimeter wave” band, which is designated as such by the International Telecommunication Union (ITU).

[0035] In light of the above, unless otherwise specifically stated, it should be understood that when the term "sub-6GHz" is used herein, it can broadly refer to frequencies that are less than 6GHz, within FR1, or may include intermediate frequency band frequencies. Furthermore, unless otherwise specifically stated, it should be understood that when the term "millimeter wave" is used herein, it can broadly refer to frequencies that may include intermediate frequency band frequencies, within FR2, or within the EHF band.

[0036] NR supports beamforming and allows for dynamic configuration of beam direction. It also supports precoded multiple-input multiple-output (MIMO) transmission. MIMO configuration in the downlink (DL) can support up to eight transmit antennas, with up to eight streams in multi-layer DL transmission and up to two streams per UE. Multi-layer transmission with up to two streams per UE is supported. Aggregation of multiple cells with up to eight serving cells is also supported.

[0037] Example wireless communication system

[0038] Figure 1 An example wireless communication network 100 in which aspects of this disclosure may be implemented is shown. For example, according to some aspects, the wireless communication network 100 may include a base station (BS) 110 and / or a user equipment (UE) 120. Figure 1 As shown, UE120a includes a Layer 1 / Layer 2 (L1 / L2) mobility manager 122, which can be configured to execute Figure 7 Operation 700. BS110a includes an L1 / L2 mobility manager 122, which can be configured to perform... Figure 8 Operation 800.

[0039] The wireless communication network 100 can be a new radio (NR) system (e.g., a fifth-generation (5G) NR network). Figure 1 As shown, the wireless communication network 100 can communicate with the core network. The core network can communicate with BS110a-z (each of which is also individually referred to as BS110 or collectively referred to as BS110 herein) and / or UE120a-y (each of which is also individually referred to as UE 120 or collectively referred to as UE 120 herein) in the wireless communication network 100 via one or more interfaces.

[0040] BS110 can provide communication coverage for a specific geographic area (sometimes referred to as a "cell"), which can be fixed or mobile depending on the location of the mobile BS110. In some examples, BS110 can be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless communication network 100 using any suitable transport network via various types of backhaul interfaces (e.g., direct physical connection, wireless connection, virtual network, etc.). Figure 1 In the example shown, BS110a, 110b, and 110c can be macroBSs for macro cells 102a, 102b, and 102c, respectively. BS110x can be a picoBS for pico cell 102x. BS110y and 110z can be femtoBSs for femto cells 102y and 102z, respectively. BS110 can support one or more cells.

[0041] BS110 communicates with UE 120 in the wireless communication network 100. UE 120 (e.g., 120x, 120y, etc.) may be distributed throughout the wireless communication network 100, and each UE 120 may be fixed or mobile. The wireless communication network 100 may also include relay stations (e.g., relay station 110r) (also referred to as repeaters, etc.) that receive transmissions of data and / or other information from upstream stations (e.g., BS110a or UE 120r) and transmit such transmissions to downstream stations (e.g., UE 120 or BS110), or relay transmissions between UE 120 to facilitate communication between wireless devices.

[0042] Network controller 130 can communicate (e.g., via backhaul) with a group of BS110s and provide coordination and control for these BS110s. In various aspects, network controller 130 can communicate with core network 132 (e.g., a 5G core network (5GC)) which provides various network functions such as access and mobility management, session management, user plane functions, policy control functions, authentication server functions, unified data management, application functions, network openness functions, network repository functions, network slice selection functions, etc.

[0043] Figure 2 Showing BS110a and UE 120a (e.g., in Figure 1 Example components in wireless communication network 100.

[0044] At BS110a, the transmitting processor 220 can receive data from the data source 212 and control information from the controller / processor 240. Control information can be used for the Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), Group Common PDCCH (GC PDCCH), etc. Data can be used for the Physical Downlink Shared Channel (PDSCH), etc. The Media Access Control-Control Element (MAC-CE) is a MAC layer communication structure that can be used for exchanging control commands between wireless nodes. The MAC-CE can be carried in shared channels (such as PDSCH, Physical Uplink Shared Channel (PUSCH), or Physical Sidelink Shared Channel (PSSCH)).

[0045] Transmit processor 220 can process (e.g., encode and symbol map) data and control information separately to obtain data symbols and control symbols. Processor 220 can also generate reference signals, for example, for the primary synchronization signal (PSS), secondary synchronization signal (SSS), and cell-specific reference signal (CRS). TX multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding, if applicable) on data symbols, control symbols, and / or reference symbols, and can provide output symbol streams to modulators (MODs) in transceivers 232a-232t. Each MOD in transceivers 232a-232t can process the corresponding output symbol stream (e.g., for orthogonal frequency division multiplexing (OFDM), etc.) to obtain an output sample stream. Each MOD in transceivers 232a-232t can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink (DL) signal. The DL signal from MOD in transceivers 232a-232t can be transmitted via antennas 234a-234t respectively.

[0046] At UE 120a, antennas 252a-252r can receive DL signals from BS110 and can provide the received signals to demodulators (DEMODs) in transceivers 254a-254r respectively. Each DEMOD in transceiver 254 can adjust (e.g., filter, amplify, down-convert, and digitize) the corresponding received signal to obtain an input sample. Each DEMOD in transceiver 254 can further process the input sample (e.g., for OFDM, etc.) to obtain the received symbols. MIMO detector 256 can obtain the received symbols from all DEMODs in transceivers 254a-254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. Receiver processor 258 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to data sink 260, and provide decoded control information to controller / processor 280.

[0047] On the uplink (UL), at UE 120a, the transmitting processor 264 can receive and process data from data source 262 (e.g., for PUSCH) and control information from controller / processor 280 (e.g., for Physical Uplink Control Channel (PUCCH)). The transmitting processor 264 can also generate reference symbols for reference signals (e.g., for Sounding Reference Signals (SRS)). Symbols from the transmitting processor 264 can be pre-encoded (if applicable) by the transmitting MIMO processor 266, further processed by MODs (e.g., for SC-FDM, etc.) in transceivers 254a-254r, and transmitted to BS 110a. At BS 110a, uplink signals from UE 120a can be received by antenna 234, processed by DEMODs in transceiver 232, detected by MIMO detector 236 (if applicable), and further processed by the receiving processor 238 to obtain decoded data and control information transmitted by UE 120a. The receiver processor 238 can provide decoded data to the data sink 239 and decoded control information to the controller / processor 240.

[0048] Memory 242 and 282 can store data and program code for BS110a and UE 120a, respectively. Scheduler 244 can schedule UE 120a for data transmission over DL and / or UL.

[0049] The antenna 252, processors 266, 258, 264 and / or controller / processor 280 of UE 120a and / or the antenna 234, processors 220, 230, 238 and / or controller / processor 240 of BS110a can be used to perform the various techniques and methods described herein. For example, as Figure 2 As shown, the controller / processor 240 of the BS110a has an L1 / L2 mobility manager 241, which can be configured to perform in Figure 8 The operations shown in the diagram, as well as other operations disclosed herein. For example... Figure 2 As shown, the controller / processor 280 of UE 120a has an L1 / L2 mobility manager 281, which can be configured to perform in Figure 7 The operations shown herein, as well as other operations disclosed herein, are illustrated. Although shown at the controller / processor, other components of UE 120a and BS110a can be used to perform the operations described herein.

[0050] NR can utilize OFDM with a cyclic prefix (CP) on both UL and DL. NR can support half-duplex operation using Time Division Duplex (TDD). OFDM and Single Carrier Frequency Division Multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are often referred to as frequency modulation, frequency slots, etc. Data can be modulated onto each subcarrier. Modulation symbols can be transmitted in the frequency domain using OFDM and in the time domain using SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. The minimum resource allocation, called a resource block (RB), can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, a subband can cover multiple RBs. NR can support a basic subcarrier spacing (SCS) of 15 kHz and can define other SCSs (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.) relative to the basic SCS.

[0051] Figure 3A This is a diagram illustrating an example of frame format 300 for NR. The transmission timeline for each of DL and UL can be divided into units of radio frames. Each radio frame can have a predetermined duration (e.g., 10 ms) and can be divided into 10 subframes with indices 0 to 9, each subframe being 1 ms. Each subframe can include a variable number of time slots, depending on the SCS. An index can be assigned to the symbol period in each time slot. A sub-time slot structure can refer to a transmission time interval with a duration less than the time slot duration (e.g., 2, 3, or 4 symbols). Each symbol in a time slot can be configured for a link direction of data transmission (e.g., DL, UL, or flexible), and the link direction for each subframe can be dynamically switched. The link direction can be based on the time slot format. Each time slot can include DL / UL data and DL / UL control information.

[0052] In NR, a Synchronization Signal Block (SSB) is transmitted. In some aspects, SSBs can be transmitted in bursts, where each SSB in the burst corresponds to a different beam direction used for UE-side beam management (e.g., including beam selection and / or beam refinement). An SSB includes a PSS, an SSS, and a two-symbol PBCH. It can be transmitted at fixed time slot locations (such as in...). Figure 3ASSBs are transmitted in symbols 0-3 shown in the diagram. PSS and SSS can be used by the UE for cell search and acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identity. PBCH carries certain basic system information, such as DL system bandwidth, timing information within the radio frame, SS burst set periodicity, system frame number, etc. SSBs can be organized into SS bursts to support beam scanning. Additional system information, such as Residual Minimum System Information (RMSI), System Information Block (SIB), and Other System Information (OSI), can be transmitted on the PDSCH in some subframes. For mmW, SSBs can be transmitted up to sixty-four times, for example, using up to sixty-four different beam directions. Multiple transmissions of SSBs are called SS burst sets. SSBs in an SS burst set can be transmitted in the same frequency region, while SSBs in different SS burst sets can be transmitted in different frequency regions.

[0053] like Figure 3B As shown, SSBs can be organized into SS burst sets to support beam scanning. As illustrated, different beams can be used to transmit each SSB within a burst set, which helps the UE quickly acquire both the transmit (Tx) and receive (Rx) beams (especially for mmW applications). The Physical Cell Identifier (PCI) can still be decoded from the PSS and SSS of the SSB.

[0054] A control resource set (CORESET) for a wireless communication system (such as NR and LTE systems) may include one or more sets of control resources (e.g., time and frequency resources) configured to transmit PDCCH within the system bandwidth. Within each CORESET, one or more search spaces (e.g., common search space (CSS), UE-specific search space (USS), etc.) are defined for a given UE. According to various aspects of this disclosure, a CORESET is a time-domain and frequency-domain resource set defined in units of resource element groups (REGs). Each REG includes a fixed number (e.g., twelve) of frequency moduli within a symbol period (e.g., the symbol period of a time slot), where one frequency moduli within a symbol period is referred to as a resource element (RE). A fixed number of REGs may be included in control channel elements (CCEs). A set of CCEs may be used to transmit NR-PDCCH, where different numbers of CCEs in the set are used to transmit NR-PDCCH using different aggregation levels. Multiple CCE sets can be defined as a search space for the UE, and thus a Node B (or other BS) can send an NR-PDCCH to the UE by sending an NR-PDCCH in a set of CCE candidates defined as being in the search space for the UE, and the UE can receive an NR-PDCCH by searching for and decoding the NR-PDCCH sent by the Node B in the search space for the UE.

[0055] Example methods for L1 / L2 mobility

[0056] Various aspects of this disclosure relate to wireless communications, and more specifically, to mobility technologies that allow dynamic updating of cells and / or beam sets activated to serve a user equipment (UE). As will be described in more detail below, activated cells can be updated to be deactivated based on physical (PHY) layer (Layer 1 or L1) or media access control (MAC) layer (Layer 2 or L2) signaling indicating one or more cells and / or beams to be activated and / or deactivated.

[0057] The techniques presented in this paper can be applied to various frequency bands used in New Radio (NR). For example, for the higher frequency band known as FR4 (e.g., 52.6 GHz–114.25 GHz), orthogonal frequency division multiplexing (OFDM) waveforms with very large subcarrier spacing (960 kHz–3.84 MHz) are required to combat severe phase noise. Due to the large subcarrier spacing (SCS), the slot length tends to be very short. In the lower frequency band known as FR2 (24.25 GHz to 52.6 GHz) with a 120 kHz SCS, the slot length is 125 μs, while in FR4 with a 960 kHz SCS, the slot length is 15.6 μs.

[0058] In multi-beam operations (e.g., involving FR1 and FR2 bands), more efficient uplink (UL) / downlink (DL) beam management can allow for increased intra-cell and inter-cell mobility (e.g., L1 and / or L2-centric mobility) and / or a greater number of Transmission Configuration Indicator (TCI) states. For example, TCI states may include data and control transmission and reception using a common beam for UL and DL operations, a unified TCI framework for UL and DL beam indication, and enhanced signaling mechanisms (e.g., dynamic use of control signaling) to improve latency and efficiency.

[0059] The techniques presented in this paper provide signaling mechanisms that can help support such enhanced features, improve latency, and increase efficiency by making greater use of dynamic control signaling. For example, the techniques described in this paper utilize PHY or MAC layer signaling instead of higher layers (e.g., Radio Resource Control (RRC)) signaling.

[0060] Figure 4 An example architecture 400 is shown in which various aspects of this disclosure can be practiced. Architecture 400 includes a gNB Central Unit (gNB-CU). The gNB-CU acts as a logical node that hosts and controls the RRC, Service Data Adaptation Protocol (SDAP), and Packet Data Convergence Protocol (PDCP) protocols of the gNB that control the operation of one or more gNB Distributed Units (gNB-DUs). The gNB-CU terminates the F1 interface connected to the gNB-DU.

[0061] The gNB-DU acts as a logical node hosting the radio link control (RLC), MAC, and PHY layers of the gNB, and its operation is controlled by the gNB-CU. In some cases, such as Figure 5 and Figure 6 As shown, one gNB-DU supports one or more cells (but each cell is supported by only one gNB-DU). The gNB-DU terminates the F1 interface connected to the gNB-CU.

[0062] like Figure 5 As shown, the UE hands over between (source and target) cells supported by different gNB-DUs (Radio Units (RUs)) under the same gNB-CU. The RU contains only PHY layer logic. Figure 5 In this scenario, a cell can have non-co-located (in different gNB-DUs) PHY, MAC, and RLC logic, but share common PDCP and RRC logic (in the same gNB-CU). While the L1 / L2 signaling techniques described in this paper can be used for mobility, the data path from the PDCP to different RLCs presents some control aspects that can be addressed through coordination between gNB-DUs.

[0063] On the other hand, Figure 6 In the scenario shown, the source and target cells are supported by the same gNB-DU (belonging to the same gNB-DU). Therefore, L1 / L2 mobility may be particularly attractive in this case because the cells can share the MAC and upper layers (the same gNB-DU). In this scenario, when a handover is performed via L1 / L2 signaling, the data paths above the MAC remain the same.

[0064] As described above, the distributed RU only contains the PHY layer and can be used (activated / deactivated) in a manner similar to carrier aggregation (CA), but the cells can be on the same carrier frequency. Therefore, however, aspects of this disclosure can utilize mechanisms similar to those used in CA to achieve L1 / L2 mobility (e.g., activating / deactivating cells).

[0065] As an initial step, RRC signaling can be used to configure the cell set for L1 / L2 mobility. The cell set can be designed to be large enough to cover meaningful mobility (e.g., the UE's expected mobility in a given area and time period). Mobility management can be performed by activating / deactivating cells in the cell set, as described below.

[0066] At any given time, a set of cells can be activated from a configured set. An activated set of cells refers to one or more activated cells within the configured set. If an activated set of cells includes two or more activated cells, the UE can switch from one activated cell to another via dynamic (PHY / MAC) signaling.

[0067] For any given UE, which cells are activated may depend on the measurements reported by the UE. Configurable cells that are not activated (e.g., a set of deactivated cells) may include the group of deactivated (inactive) (remaining) cells in the configured set.

[0068] Example target PCI selection

[0069] This disclosure provides apparatus, methods, processing systems, and computer-readable media for realizing physical layer (PHY, layer 1 or L1) or media access control (MAC, layer 2 or L2) 1 / layer 2 (L1 / L2) inter-cell mobility based on signaling to / from user equipment (UE). In some cases, L1 / L2 signaling can be used to indicate the target physical cell ID (PCI) selected for handover.

[0070] Several features can facilitate uplink (UL) beam selection for UEs equipped with multiple panels. For example, UL beam selection can be facilitated through UL beam indication based on the Unified Transport Configuration Indicator (TCI) framework, enabling simultaneous transmission across multiple planes and achieving fast plane selection. Furthermore, UE-initiated or L1 event-driven beam management can reduce latency and the probability of beam failure events.

[0071] Additional enhancements for multiple transmit and receive point (multiple TRP) deployments can target both FR1 and FR2 bands. These enhancements can improve reliability and robustness for channels other than the Physical Downlink Shared Channel (PDSCH), such as the Physical Downlink Control Channel (PDCCH), Physical Uplink Shared Channel (PUSCH), and Physical Uplink Control Channel (PUCCH), using multiple TRP and / or multi-plane operation. In some cases, these enhancements can be associated with Quasi-Co-location (QCI) and TCI, which enable inter-cell multiple TRP operation and, assuming multiple DCI-based multiple PDSCH reception, allow simultaneous multiple TRP transmissions with multi-plane reception.

[0072] Further enhancements can support single-frequency networks (SFNs) in high-speed environments, such as high-speed train (HST) scenarios. These can include QCL assumptions for the demodulation reference signal (DMRS), such as multiple QCL assumptions for the same DMRS port and / or for downlink-only (DL) transmissions. In some cases, enhancements can be achieved by using a unified TCI framework to specify the QCL or similar QCL relationship between DL and UL signals, including the applicable QCL types and associated requirements.

[0073] In versions 15 and 16, each serving cell can have a serving cell ID configured via Radio Resource Control (RRC) and a physical cell identifier (PCI) configured via RRC. The UE can also obtain the physical cell identifier from the serving cell's Synchronization Signal Block (SSB).

[0074] To enable L1 / L2-based inter-cell mobility, the gNB may need to know whether the UE supports L1 / L2 mobility. L1 / L2-based inter-cell mobility can include various operating modes. In a first operating mode, each serving cell can have a PCI and multiple physical cell sites (e.g., Remote Radio Headers (RRHs)). Each RRH can use the same PCI to transmit different sets of SSB IDs. The DCI or MAC control element (MAC-CE) can select which RRH or corresponding SSB to serve the UE based on a signal strength metric (e.g., Reference Received Power (RSRP)) for each reported SSB ID.

[0075] In another operating mode, each serving cell can be configured with multiple PCIs. Each RRH of the serving cell can use one of the multiple PCIs configured for the serving cell and can send the complete set of SSB IDs configured for the serving cell. DCI or MAC-CE can select which RRHs or corresponding PCIs and / or SSBs to serve the UE based on a signal strength metric (e.g., RSRP) for each reported SSB ID of each reported PCI.

[0076] In another operating mode, each serving cell can be configured with a single PCI. The DCI or MAC-CE can identify the serving cell or the corresponding serving cell ID to serve the UE based on a signal strength metric (e.g., RSRP) for each reported SSB ID of each reported PCI.

[0077] While the selection or use of SSB has been mentioned above, it should be understood that other Cell Identification Reference Signals (RS) can be used to identify the serving cell to serve the UE. For example, Channel State Information (CSI) RS (CSI-RS) or Positioning RS (PRS) can be used to identify the serving cell to serve the UE.

[0078] In some embodiments, during L1 / L2 inter-cell mobility, the UE may be configured with multiple candidate cells (e.g., PCI) for L1 metric measurement and reporting. When the UE is stationary or substantially stationary, L1 metric measurement and reporting may waste power. The UE may continue to report L1 metrics while stationary, and the UE may spend some time before the gNB determines that the UE is stationary based on the reported L1 metrics.

[0079] Example CA / DC reconfiguration in L1 / L2-based inter-cell mobility

[0080] Various aspects of this disclosure relate to wireless communications, and more specifically, to techniques for supporting cell group reconfiguration for inter-cell mobility based on physical layer (PHY, layer 1 or L1) or medium access control (MAC, layer 2 or L2) 1 / layer 2 (L1 / L2) signaling. For example, the techniques given herein can be applied, for instance, to establishing, updating, and / or releasing cell groups (CGs) in carrier aggregation (CA) and / or dual connectivity (DC) configurations.

[0081] To reduce handover (HO) latency, L1 / L2-based inter-cell mobility was introduced (in Release 17). In L1 / L2-based HO, each serving cell can have multiple Physical Cell Identifiers (PCIs) for the Remote Radio Header (RRH), which can be located at different physical locations. The gNB can dynamically select a subset of PCIs of the same serving cell to serve the User Equipment (UE) via L1 / L2 signaling (e.g., Downlink Control Information (DCI) or MAC Control Elements (MAC-CE)). In another implementation, each serving cell can have a single PCI (e.g., as defined in the specification for each serving cell). The gNB can dynamically select at least one serving cell to serve the UE via L1 / L2 signaling.

[0082] Furthermore, L1 / L2 inter-cell mobility based on the Random Access Channel (RACH) can be implemented in the above example. In this case, if the HO condition is met for the selected PCI, the UE can select the PCI and initiate the RACH for the selected PCI, instead of the gNB selecting the PCI. For example, multiple candidate target PCIs can be pre-configured to the UE by the gNB.

[0083] The gNB can also configure the UE to measure L1 metrics for each candidate target PCI. L1 metrics may include L1 Reference Signal Received Power (RSRP) and / or L1 Signal-to-Interference-plus-Noise Ratio (L1-SINR). The gNB can also configure at least one HO condition for each candidate target PCI. For example, the HO condition can use the L1 metric as input.

[0084] Whenever the HO condition is met for a candidate target PCI, the UE can initiate a synchronized (e.g., via RACH) reconfiguration on the uplink (UL) resources configured for the candidate target PCI. The completion of the RACH-based L1 / L2 HO can be indicated by an HO completion message signaled via L1 / L2 signaling. This HO completion message can be sent from the UE to the RRH and / or cell associated with the candidate target PCI. Alternatively, the HO completion message can be received by the UE.

[0085] In cases involving CA and / or DC, a potential issue to be addressed for L1 / L2-based PCI selection is the speed of updating / modifying the CA and / or DC (CG and / or component carrier (CC)) configurations associated with the source / destination PCI. Refer to the example CA scenario to understand the types of modifications that may be required.

[0086] Using CA, a single CG can include a primary cell (PCell) and one or more secondary cells (SCells). In an example scenario, prior to L1 / L2-based PCI selection, the UE can be served in the CA, where CC1 is the PCell associated with PCI1, and CC2 and CC3 are SCells, all of which can be configured at the first RRH (RRH 1). However, after L1 / L2-based PCI selection, the UE can be served in the CA, where CC4 is the PCell (associated with PCI2), and CC5, CC6, and CC7 are SCells, all of which are configured at the second RRH (RRH 2).

[0087] In this example scenario, in order to take advantage of the reduced latency achieved via L1 / L2 mobility signaling, the UE should be able to quickly release / deactivate CCs (CC1-CC3) in the original CA configuration (e.g., before the PCI selection command) and quickly establish / activate CCs (CC4-CC7) in the new CA configuration (e.g., after the PCI selection command).

[0088] As a supplement (or alternative) to CA, the UE can operate using DC configuration before and / or after L1 / L2-based inter-cell mobility. Using DC, multiple CGs can include a primary CG (MCG) with a PCell and one or more SCells, and a secondary CG (SCG) with a primary SCell (PSCell) and one or more SCells. Therefore, a potential issue similar to that described above regarding CA is the timing of releasing / deactivating the original DC configuration and setting / activating the new DC configuration.

[0089] Various aspects of this disclosure provide techniques for modifying the CG (e.g., CA and / or DC) configuration in radio systems supporting inter-cell mobility based on L1 / L2 signaling. As will be described, in some cases, the UE may be implicitly signaled to the UE with information for updating the CA / DC configuration. In other cases, the UE may be explicitly signaled to the UE with information for updating the CA / DC configuration.

[0090] Figure 7 This is a flowchart illustrating an example operation 700 for wireless communication according to certain aspects of this disclosure. Operation 700 can be performed, for example, by a UE (e.g., such as...). Figure 1 The operation 700 is performed by a UE 120a in the wireless communication network 100 to modify the CA / DC configuration in L1 / L2-based inter-cell mobility. Operation 700 can be implemented in one or more processors (e.g., Figure 2The software components executed and running on the controller / processor 280. Furthermore, the transmission and reception of signals by the UE in operation 700 can be, for example, by one or more antennas (e.g., Figure 2 This can be achieved via antenna 252. In some aspects, the UE can transmit and / or receive signals via a bus interface of one or more processors (e.g., controller / processor 280) that acquires and / or outputs signals.

[0091] Operation 700 at 702 begins by receiving signaling for multiple candidate target PCIs of at least one candidate target cell configured to support PHY layer or MAC layer mobility signaling. For example, the UE can use... Figure 1 or Figure 2 The UE 120a and / or shown Figure 9 The device shown uses an antenna and receiver / transceiver assembly to receive signaling.

[0092] At 704, the UE participates in the HO procedure for a target cell associated with one or more candidate target PCIs from the candidate target PCIs, based on PHY layer or MAC layer mobility signaling. For example, the UE can use... Figure 1 or Figure 2 The UE120a and / or shown Figure 9 The processor and / or antenna of the device shown participate in the HO process.

[0093] At 706, the UE modifies the configuration for at least one CG, wherein one or more candidate target PCIs among the candidate target PCIs are associated with the CC of at least one CG. For example, the UE can use Figure 1 or Figure 2 The UE 120a and / or shown Figure 9 The processor of the device shown modifies the configuration for at least one CG.

[0094] Figure 8 This is a flowchart illustrating example operation 800 for wireless communication according to certain aspects of this disclosure. For example, operation 800 may be performed by a network entity (e.g., such as...) providing L1 / L2 signaling to the UE. Figure 1 The operation 800 is performed in one or more processors (e.g., BS110a in the wireless communication network 100). Figure 2 The software components executed and running on the controller / processor 240. Furthermore, the transmission and reception of signals by the BS in operation 800 can be, for example, by one or more antennas (e.g., Figure 2This can be achieved via antenna 234. In some aspects, the BS can transmit and / or receive signals via a bus interface of one or more processors (e.g., controller / processor 240) that acquire and / or output signals.

[0095] Operation 800 at 802 begins by sending signaling to the UE to multiple candidate target PCIs of at least one candidate target cell configured to support PHY layer or MAC layer mobility signaling. For example, a network entity can use... Figure 1 or Figure 2 The BS110a and / or shown Figure 10 The device shown uses an antenna and a transmitter / transceiver assembly to transmit signaling.

[0096] At 804, network entities participate in the HO procedure for a UE to a target cell associated with one or more candidate target PCIs from the candidate target PCIs, based on PHY layer or MAC layer mobility signaling. For example, network entities can use... Figure 1 or Figure 2 The BS110a and / or shown Figure 10 The device shown has a processor and antenna to participate in the HO process.

[0097] At 806, the network entity modifies the configuration for at least one CG, wherein one or more candidate target PCIs from the candidate target PCIs are associated with the CC of at least one CG. For example, the network entity can use Figure 1 or Figure 2 The BS110a and / or shown Figure 10 The processor of the device shown modifies the configuration for at least one CG.

[0098] In some cases, when modifying the CA configuration, only a single CG (e.g., MCG) may exist. In this scenario, the CA configuration may include a PCell configuration within the MCG and a separate SCell configuration. In some examples, each selected PCI may be associated with a CC (e.g., a PCell or SCell within the MCG).

[0099] In some aspects, when the DC configuration is being modified, there may be MCGs and SCGs, and the DC configuration may include special cell (SPCell) configurations and individual SCell configurations within each CG. In this case, each selected PCI may be associated with a CC in one of the two CGs (e.g., an SPCell in the MCG or SCG).

[0100] In some respects, modifications to the CA / DC configuration can be implicitly indicated to the UE. In other words, messages for L1 / L2-based inter-cell mobility, including PCI selection commands, may not include explicit signaling with modified configurations.

[0101] As an example of implicit indication, the CA / DC configuration can be identical, regardless of which PCI(s) are selected to serve the UE. Therefore, after reselecting a PCI, there may be no signaling with a modified CA / DC configuration. For example, when configuring multiple PCIs per serving cell in L1 / L2 mobility, each RRH associated with each candidate PCI can have the same CA / DC configuration.

[0102] In some respects, the CA / DC configuration can be different across PCIs and can be pre-configured to the UE for each PCI. In such cases, when a new PCI is selected, the UE can automatically apply one or more corresponding CA / DC configurations. Therefore, there may be no explicit signaling for a modified CA / DC configuration to the UE. For example, for multiple PCIs per serving cell in L1 / L2 mobility, each RRH associated with each candidate PCI can have its own CA / DC configuration, which can be pre-configured to the UE.

[0103] In the case of CA, the pre-configured CA configurations for any two PCIs (e.g., two) can be the same or different. In the case of DC, the two pre-configured DC configurations for any two PCIs can be the same, and can be different for only one of the two CGs (e.g., for MCG or SCG), or can be different for both CGs.

[0104] In some respects, modifications to the CA / DC configuration are explicitly indicated to the UE. For example, explicit indication of the CA / DC configuration can be provided in L1 / L2 signaling (e.g., DCI or MAC-CE) that includes PCI selection commands.

[0105] In some examples, the configuration of individual CCs and / or CGs in the CA / DC configuration can be pre-configured for the UE. In this case, when the corresponding PCI is reselected, the status and / or role of each corresponding CC / CG can be dynamically indicated to the UE.

[0106] Examples of CC / CG states can include activated, deactivated, in-cell, out-of-cell, dormant, or released. In some cases, a CC's role can be a PCell in an MCG, a primary / secondary cell (PSCell) in an SCG, and / or an SCell in an MCG or SCG. In some cases, each CG's role can be either an MCG or an SCG.

[0107] In some cases, for each CC / CG where the UE is not (explicitly) instructed to update the corresponding state and / or role, a default state and / or role can be predefined. For example, the default state could be the current state, the disabled state, the activated state, the state of entering a dormant state, the state of leaving a dormant state, or the released state, while the example default role could be the current role.

[0108] In some aspects, when reselecting a PCI, the configuration of at least one CC / CG can be dynamically modified or added to the UE. In other words, the configuration of at least one CC / CG itself can be changed. For example, CC configuration may include configuration of operational parameters such as bandwidth, bandwidth portion (BWP), synchronization signal block (SSB), RACH, physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), physical uplink control channel (PUCCH), or reference signal (RS) configuration. In some examples, CG configuration may include the number of CCs in the CG, the role of each CC, and / or the role of the CG.

[0109] In some respects, dynamic modification of this configuration can be achieved in conjunction with the pre-configuration of the aforementioned CA / DC configuration.

[0110] Example wireless communication device

[0111] Figure 9 The description may include operations configured to perform the techniques disclosed herein (such as...) Figure 7 The communication device 900 comprises various components (e.g., corresponding component plus functional components) of the operation described herein. The communication device 900 includes a processing system 902 coupled to a transceiver 908 (e.g., a transmitter and / or receiver). The transceiver 908 is configured to transmit and receive signals for the communication device 900 via an antenna 910, such as the various signals described herein. The processing system 902 is configured to perform processing functions for the communication device 900, including processing signals to be received and / or transmitted by the communication device 900.

[0112] Processing system 902 includes processor 904 coupled to computer-readable medium / memory 912 via bus 906. In some aspects, computer-readable medium / memory 912 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 904, cause processor 904 to perform... Figure 7 The operations described herein or other operations used to perform the various techniques discussed herein. In some aspects, the computer-readable medium / memory 912 stores code 914 for receiving, code 916 for participating, and code 918 for modifying. Code 914 for receiving may include: code for receiving signaling of a plurality of candidate target physical cell identifiers (PCIs) of at least one candidate target cell configured to support physical (PHY) layer or media access control (MAC) layer mobility signaling. Code 916 for participating may include: code for participating in a handover process of a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on PHY layer or MAC layer mobility signaling. Code 918 for modifying may include: code for modifying the configuration for at least one cell group (CG), wherein one or more candidate target PCIs from the candidate target PCIs are associated with a component carrier (CC) of at least one CG.

[0113] Processor 904 may include a circuit system configured to implement code stored in computer-readable medium / memory 912, such as for executing Figure 7 The operations described herein, as well as other operations used to perform the various techniques discussed herein, are described. For example, processor 904 includes circuitry 920 for receiving, circuitry 922 for participating, and circuitry 924 for modifying. Circuitry 920 for receiving may include circuitry for receiving signaling of a plurality of candidate target PCIs configured to support at least one candidate target cell using PHY or MAC layer mobility signaling. Circuitry 922 for participating may include circuitry for participating in a handover process of a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on PHY or MAC layer mobility signaling. Circuitry 924 for modifying may include code for modifying the configuration for at least one CG, wherein one or more candidate target PCIs are associated with a CC of at least one CG.

[0114] Figure 10 The description may include operations configured to perform the techniques disclosed herein (such as...) Figure 8The communication device 1000 comprises various components (e.g., corresponding component plus functional components) of the operation described herein. The communication device 1000 includes a processing system 1002 coupled to a transceiver 1008 (e.g., a transmitter and / or receiver). The transceiver 1008 is configured to transmit and receive signals for the communication device 1000, such as the various signals described herein, via an antenna 1010. The processing system 1002 is configured to perform processing functions for the communication device 1000, including processing signals to be received and / or transmitted by the communication device 1000.

[0115] Processing system 1002 includes processor 1004 coupled to computer-readable medium / memory 1012 via bus 1006. In some aspects, computer-readable medium / memory 1012 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 1004, cause processor 1004 to perform. Figure 8 The operations described herein, or other operations used to perform the various techniques discussed herein. In some aspects, the computer-readable medium / memory 1012 stores code 1014 for transmission, code 1016 for participation, and code 1018 for modification. Code 1014 for transmission may include: code for transmitting to the UE signaling a plurality of candidate target PCIs of at least one candidate target cell that configures PHY layer or MAC layer mobility signaling. Code 1016 for participation may include: code for participating in a handover process of the UE to a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on PHY layer or MAC layer mobility signaling. Code 1018 for modification may include: code for modifying the configuration for at least one CG, wherein one or more candidate target PCIs from the candidate target PCIs are associated with a CC of at least one CG.

[0116] Processor 1004 may include circuitry configured to implement code stored in computer-readable medium / memory 1012, for example, for executing... Figure 8The operations described herein, as well as other operations used to perform the various techniques discussed herein, are described. For example, processor 1004 includes circuitry 1020 for transmission, circuitry 1022 for participation, and circuitry 1024 for modification. Circuitry 1020 for transmission may include circuitry for transmitting to the UE signaling a plurality of candidate target PCIs configured to support at least one candidate target cell using PHY or MAC layer mobility signaling. Circuitry 1022 for participation may include circuitry for participating in a handover process of the UE to a target cell associated with one or more candidate target PCIs from the candidate target PCIs, based on PHY or MAC layer mobility signaling. Circuitry 1024 for modification may include circuitry for modifying the configuration for at least one CG, wherein one or more candidate target PCIs from the candidate target PCIs are associated with a CC of at least one CG.

[0117] Example

[0118] Implementation examples are described in the following numbered clauses:

[0119] In a first aspect, a method for wireless communication by a user equipment (UE) includes: receiving signaling of a plurality of candidate target physical cell identifiers (PCIs) of at least one candidate target cell configured to support physical (PHY) layer or medium access control (MAC) layer mobility signaling; participating in a handover process of a target cell associated with one or more selected candidate target PCIs from the candidate target PCIs based on the PHY layer or MAC layer mobility signaling; and modifying a configuration for at least one cell group (CG), wherein one or more candidate target PCIs from the candidate target PCIs are associated with a component carrier (CC) of at least one CG.

[0120] In a second aspect, either alone or in combination with the first aspect, information for modifying the configuration is implicitly indicated to the UE.

[0121] In a third aspect, either alone or in combination with one or more of the first and second aspects, multiple candidate target PCIs share a common configuration for at least one of carrier aggregation (CA) or dual connectivity (DC); and modifying this configuration includes updating the PCI associated with the component carrier (CC) of at least one CG based on one or more candidate target PCIs associated with the target cell.

[0122] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, signaling is received that pre-configures the UE with a different configuration of at least one of carrier aggregation (CA) or dual connectivity (DC) for a plurality of candidate target PCIs; and modifying the configuration includes applying one or more pre-configured configurations to one or more candidate target PCIs associated with a target cell.

[0123] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, multiple PCIs are associated with the target cell.

[0124] In the sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the pre-configured configuration includes: the same pre-configured CA configuration for at least two of the PCIs associated with the target cell and the source cell; or different pre-configured CA configurations for at least two of the PCIs associated with the target cell and the source cell.

[0125] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, the pre-configured configuration includes: the same pre-configured DC configuration for at least two of the PCIs associated with the target cell and the source cell; different pre-configured DC configurations for at least two of the PCIs associated with the target cell and the source cell, which are associated with a primary cell group (MCG); or different pre-configured DC configurations for at least two of the PCIs associated with the target cell and the source cell, which are associated with a secondary cell group (SCG).

[0126] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the UE is notified by signaling of information for modifying the configuration; and the UE modifies the configuration based on the information notified by signaling.

[0127] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the information is communicated via at least one of downlink control information (DCI) or MAC control element (MAC-CE).

[0128] In the tenth aspect, either alone or in combination with one or more of the first to ninth aspects, signaling is received that pre-configures the UE with different configurations for at least one of carrier aggregation (CA) or dual connectivity (DC) for individual component carriers (CC) or cell groups (CG); and information signaled to the UE for modifying the configuration indicates at least one of the updated states or roles of one or more CCs or CGs.

[0129] In the eleventh aspect, either alone or in combination with one or more of the first to tenth aspects, the updated state includes at least one of being activated, deactivated, entering a cell, leaving a cell, in a cell group dormant state, or being released.

[0130] In the twelfth aspect, alone or in combination with one or more of the first to eleventh aspects, the updated role for CC includes at least one of the following: primary cell (PCell) in the primary cell group (MCG), primary-secondary cell (PSCell) in the secondary cell group (SCG), or secondary cell (SCell) in the MCG or SCG.

[0131] In the thirteenth aspect, either alone or in combination with one or more of the first to twelfth aspects, the updated roles for CG include the primary cell group (MCG) or the secondary cell group (SCG).

[0132] In the fourteenth aspect, alone or in combination with one or more of the first to thirteenth aspects, a default state or role is applied to one or more CCs or CGs for which an updated state or role is not provided to the UE.

[0133] In the fifteenth aspect, alone or in combination with one or more of the first to fourteenth aspects, applying a default state or role for at least one of CC or CG includes maintaining the current state or role.

[0134] In the sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, the network entity indicates the selection of one or more candidate target PCIs in a selection command notified via PHY layer or MAC layer signaling; and the network entity also indicates a change to the configuration for at least one of carrier aggregation (CA) or dual connectivity (DC) for one or more individual component carriers (CC) or cell groups (CG) associated with the selected candidate target PCI.

[0135] In the seventeenth aspect, either alone or in combination with one or more of the first to sixteenth aspects, the change to the configuration includes a change to at least one of the following: the number of CCs in the CG, the role of one or more CCs in the CG, or the role of the CG.

[0136] In the eighteenth aspect, either alone or in combination with one or more of the first to seventeenth aspects, the change to the configuration includes a change to at least one of the following: the operating bandwidth, bandwidth portion (BWP), synchronization signal block (SSB), random access channel (RACH), physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), physical uplink control channel (PUCCH), or reference signal (RS) configuration.

[0137] In the nineteenth aspect, alone or in combination with one or more of the first to eighteenth aspects, signaling is received that pre-configures the UE with different configurations of at least one of the CA or DC for a single CC or CG; and the UE occasionally modifies the configuration for at least one CG or CC based on one or more of the pre-configured configurations.

[0138] In a twentieth aspect, a method for wireless communication by a network entity includes: sending signaling to a user equipment (UE) configuring a plurality of candidate target physical cell identifiers (PCIs) for at least one candidate target cell that support physical (PHY) layer or medium access control (MAC) layer mobility signaling; participating in a handover process of the UE to a target cell associated with one or more candidate target PCIs among the candidate target PCIs based on the PHY layer or MAC layer mobility signaling; and modifying a configuration for at least one cell group (CG), wherein one or more candidate target PCIs among the candidate target PCIs are associated with a component carrier (CC) of at least one CG.

[0139] In the twenty-first aspect, either alone or in combination with the twentieth aspect, information for modifying the configuration is implicitly indicated to the UE.

[0140] In the 22nd aspect, either alone or in combination with one or more of the 20th to 21st aspects, multiple candidate target PCIs share a common configuration for at least one of carrier aggregation (CA) or dual connectivity (DC); and modifying this configuration includes updating the PCI associated with the component carrier (CC) of at least one CG based on one or more candidate target PCIs associated with the target cell.

[0141] In the twenty-third aspect, alone or in combination with one or more of the twenty to twenty-two aspects, signaling is sent to the UE to pre-configure the UE with a different configuration of at least one of carrier aggregation (CA) or dual connectivity (DC) for a plurality of candidate target PCIs; and modifying the configuration includes applying one or more pre-configured configurations to one or more candidate target PCIs associated with the target cell.

[0142] In the twenty-fourth aspect, either alone or in combination with one or more of the twenty to twenty-third aspects, multiple PCIs are associated with the target cell.

[0143] In the twenty-fifth aspect, either alone or in combination with one or more of the twentieth to twenty-fourth aspects, the pre-configured configuration includes: the same pre-configured CA configuration for at least two of the PCIs associated with the target cell and the source cell; or different pre-configured CA configurations for at least two of the PCIs associated with the target cell and the source cell.

[0144] In the twenty-sixth aspect, alone or in combination with one or more of aspects 20 to 25, the pre-configured configuration includes: the same pre-configured DC configuration for at least two of the PCIs associated with the target cell and the source cell; different pre-configured DC configurations for at least two of the PCIs associated with the target cell and the source cell, which are associated with a primary cell group (MCG); or different pre-configured DC configurations for at least two of the PCIs associated with the target cell and the source cell, which are associated with a secondary cell group (SCG).

[0145] In the twenty-seventh aspect, alone or in combination with one or more of the twenty to twenty-sixth aspects, information for modifying the configuration is signaled to the UE; and the UE modifies the configuration based on the information signaled to the UE.

[0146] In the twenty-eighth aspect, either alone or in combination with one or more of the twenty to twenty-seventh aspects, the information is signaled to the UE via at least one of the downlink control information (DCI) or MAC control element (MAC-CE).

[0147] In the twenty-ninth aspect, either alone or in combination with one or more of the twenty to twenty-eighth aspects, signaling is sent to the UE to pre-configure the UE with a different configuration for at least one of carrier aggregation (CA) or dual connectivity (DC) for individual component carriers (CC) or cell groups (CG); and information signaled to the UE to modify the configuration indicates at least one of the updated states or roles of one or more CCs or CGs.

[0148] In the thirtieth aspect, either alone or in combination with one or more of the twentieth to twenty-ninth aspects, the updated state includes at least one of being activated, deactivated, entering a cell, leaving a cell, in a cell group dormant state, or being released.

[0149] In the thirty-first aspect, alone or in combination with one or more of the twentieth to thirtieth aspects, the updated role for CC includes at least one of the following: primary cell (PCell) in the primary cell group (MCG), primary-secondary cell (PSCell) in the secondary cell group (SCG), or secondary cell (SCell) in the MCG or SCG.

[0150] In aspect thirty-two, either alone or in combination with one or more of aspects twenty through thirty-one, the updated roles for CG include primary cell group (MCG) or secondary cell group (SCG).

[0151] In the thirty-third aspect, either alone or in combination with one or more of the twentieth to thirty-second aspects, a default state or role is applied to one or more CCs or CGs for which an updated state or role is not provided to the UE.

[0152] In the thirty-fourth aspect, alone or in combination with one or more of the twentieth to thirty-third aspects, applying a default state or role for at least one of CC or CG includes maintaining the current state or role.

[0153] In the thirty-fifth aspect, alone or in combination with one or more of the twentieth to thirty-fourth aspects, the network entity indicates the selection of one or more candidate target PCIs in a selection command notified via PHY layer or MAC layer signaling; and the network entity also indicates a change to the configuration of at least one of carrier aggregation (CA) or dual connectivity (DC) for one or more individual component carriers (CC) or cell groups (CG) associated with the selected candidate target PCI.

[0154] In the thirty-sixth aspect, either alone or in combination with one or more of aspects 20 to 35, the change to the configuration includes a change to at least one of the following: the number of CCs in the CG, the role of one or more CCs in the CG, or the role of the CG.

[0155] In the thirty-seventh aspect, alone or in combination with one or more of the twentieth to thirty-sixth aspects, the change to the configuration includes a change to at least one of the following: the operating bandwidth, bandwidth portion (BWP), synchronization signal block (SSB), random access channel (RACH), physical downlink control channel (PDCCH), physical downlink shared channel (PDSCH), physical uplink control channel (PUCCH), or reference signal (RS) configuration.

[0156] In the thirty-eighth aspect, alone or in combination with one or more of the twentieth to thirty-seventh aspects, the UE receives signaling that pre-configures the UE with different configurations for at least one of the CA or DC for a single CC or CG; and the UE occasionally modifies the configuration for at least one CG or CC based on one or more of the pre-configured configurations.

[0157] An apparatus for wireless communication includes: at least one processor; and a memory coupled to the at least one processor, the memory including code executable by the at least one processor to cause the apparatus to perform the method as described in any one of the first to thirty-eighth aspects.

[0158] An apparatus comprising components for performing the method as described in any one of the first to thirty-eighth aspects.

[0159] A computer-readable medium having stored thereon computer-executable code for wireless communication, the computer-executable code causing the device to perform the method as described in any one of the first to thirty-eighth aspects when executed by at least one processor.

[0160] Additional considerations

[0161] The techniques described in this article can be used in various wireless communication technologies, such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Improved LTE (LTE-A), 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 other networks. The terms "network" and "system" are often used interchangeably. CDMA networks can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other variations of CDMA. cdma2000 encompasses the IS-2000, IS-95, and IS-856 standards. TDMA networks can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement radio technologies such as NR (e.g., 5G RA), evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDMA. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). NR is an emerging wireless communication technology currently being deployed.

[0162] In 3GPP, the term "cell" can refer to the coverage area of ​​a Node B (NB) and / or the NB subsystem serving that coverage area, depending on the context in which the term is used. In NR systems, the term "cell" is interchangeable with BS, Next Generation Node B (gNB or gNodeB), Access Point (AP), Distributed Unit (DU), and Carrier or Transmitter / Receiver Point (TRP). A BS can provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in a residential area, etc.). A BS used for a macrocell can be called a macro BS. A BS used for a picocell can be called a pico BS. A BS used for a femtocell can be called a femtocell BS or a home BS.

[0163] A UE can also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smartphone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical apparatus, biometric sensor / device, wearable device (e.g., smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio unit, etc.), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media. Some UEs can be considered machine-type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTCUE include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with the BS, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or from a network (e.g., a wide area network such as the Internet or cellular networks) via wired or wireless communication links. Some UEs can be considered Internet of Things (IoT) devices, which can be narrowband IoT (NB-IoT) devices.

[0164] In some examples, access to the air interface can be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication among some or all devices and apparatuses within its service area or cell. The scheduling entity may be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, the subordinate entity utilizes the resources allocated by the scheduling entity. A base station is not the only entity that can be used as a scheduling entity. In some examples, a UE can act as a scheduling entity and can schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs can utilize the resources scheduled by that UE for wireless communication. In some examples, a UE can act as a scheduling entity in peer-to-peer (P2P) networks and / or mesh networks. In mesh network examples, in addition to communicating with a scheduling entity, UEs can also communicate directly with each other.

[0165] The methods disclosed herein include one or more steps or actions for implementing the methods. These method steps and / or actions are interchangeable. In other words, unless a specific order of steps or actions is specified, the order and / or use of a particular step and / or action can be modified.

[0166] As used in this article, the phrase “at least one of” in a list of items refers to any combination of those items, including a single member. For example, “at least one of a, b, or c” is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination of multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0167] As used herein, the term "determine" encompasses a wide variety of actions. For example, "determine" can include calculation, operation, processing, derivation, investigation, lookup (e.g., searching in a table, database, or other data structure), ascertainment, and so on. Furthermore, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), and so on. Additionally, "determine" can include parsing, selecting, choosing, establishing, and so on.

[0168] The foregoing description is provided to enable any person skilled in the art to implement the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. References to elements in the singular form are not intended to mean “one and only one”, but rather “one or more”. Unless expressly stated otherwise, the term “some” refers to one or more. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure are expressly incorporated herein by reference and intended to be included by the claims, and are known or to be known by those skilled in the art. Furthermore, nothing disclosed herein is intended to be offered to the public, whether or not such disclosure is expressly stated in the claims. No claim element is to be interpreted pursuant to paragraph 6 of 35 U.S.SC § 112 unless the element is expressly stated using the phrase “unit for…” or, in the case of a method claim, using the phrase “step for…”.

[0169] The various operations of the methods described above can be performed by any suitable component capable of performing the corresponding function. These components can include various hardware and / or software components and / or modules, including but not limited to: circuits, digital signal processors (DSPs), application-specific integrated circuits (ASICs), or processors (general-purpose or special-purpose programmable processors). Typically, in the presence of the operations shown in the figures, those operations can have corresponding paired units plus functional components with similar numbering.

[0170] The various illustrative logic blocks, modules, and circuits described in connection with this disclosure can be implemented or executed using a general-purpose processor, DSP, ASIC, field-programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration.

[0171] If implemented in hardware, an example hardware configuration could include a processing system within a wireless node. The processing system could utilize a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus could include any number of interconnect buses and bridges. The bus could connect various circuits, including a processor, machine-readable media, and a bus interface. In addition, the bus interface could be used to connect a network adapter to the processing system via the bus. The network adapter could be used to implement signal processing functions at the PHY layer. In the user terminal (see...) Figure 1 In this case, a user interface (e.g., keypad, display, mouse, joystick, etc.) can also be connected to the bus. The bus can also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and therefore will not be described further. The processor can be implemented using one or more general-purpose and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits capable of executing software. Those skilled in the art will recognize how the functions described for the processing system can be optimally implemented based on the specific application and the overall design constraints imposed on the system as a whole.

[0172] If implemented in software, the functionality can be stored or transmitted as one or more instructions or code on or through a computer-readable medium. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted to mean instructions, data, or any combination thereof. Computer-readable media includes both computer storage media and communication media, with communication media encompassing any medium that facilitates the transfer of a computer program from one place to another. The processor may be responsible for managing the bus and general-purpose processing, including executing software modules stored on the machine-readable storage medium. The computer-readable storage medium may be coupled to the processor so that the processor can read information from and write information to the storage medium. Alternatively, the storage medium may be an integral part of the processor. For example, the machine-readable medium may include a transmission line, a carrier wave modulated by data, and / or a separate computer-readable storage medium containing instructions stored thereon, all accessible to the processor via a bus interface. Alternatively or additionally, the machine-readable medium or any portion thereof may be integrated into the processor; for example, this could be a cache and / or a general-purpose register file. For example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be embodied in computer program products.

[0173] Software modules may include a single instruction or many instructions, and may be distributed across several different code segments, within different programs, and across multiple storage media. Computer-readable media may include multiple software modules. A software module includes instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include sending modules and receiving modules. Each software module may reside in a single storage device or be distributed across multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard drive into RAM. During the execution of a software module, the processor may load some of the instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general-purpose register file for execution by the processor. It will be understood that when the functionality of a software module is referred to below, this functionality is implemented by the processor when executing the instructions from that software module.

[0174] Furthermore, any connection is appropriately referred to as computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (e.g., infrared (IR), radio, and microwave), then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology (e.g., infrared, radio, and microwave) is included in the definition of medium. As used herein, disk and disc include compressed optical disc (CD), laser disc, optical disc, digital versatile optical disc (DVD), floppy disk, and... Optical discs, where magnetic disks typically copy data magnetically, use lasers to optically copy data. Therefore, in some aspects, computer-readable media can include non-transitory computer-readable media (e.g., tangible media). Furthermore, in other aspects, computer-readable media can include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0175] Therefore, certain aspects may include a computer program product for performing the operations given herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and / or encoded thereon) thereon, which can be executed by one or more processors to perform the operations described herein, for example, for performing the operations described herein and... Figure 7 and / or Figure 8 The instructions for the operation are shown in the figure.

[0176] Furthermore, it should be understood that modules and / or other suitable units for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by the user terminal and / or base station, where applicable. For example, such a device can be coupled to a server to facilitate the transmission of units for performing the methods described herein. Alternatively, the various methods described herein can be provided via storage units (e.g., RAM, ROM, physical storage media such as compressed optical discs (CDs) or floppy disks, etc.) so that the user terminal and / or base station can access the various methods when the storage units are coupled to or provided to the device. Furthermore, any other suitable techniques for providing the methods and techniques described herein to the device can be used.

[0177] It should be understood that the claims are not limited to the precise configuration and components shown above. Various modifications, alterations, and variations can be made regarding the arrangement, operation, and details of the methods and apparatus described above.

Claims

1. A user equipment (UE) for wireless communication, comprising: At least one memory, which includes instructions; and At least one processor is configured to execute the instructions such that the UE: Receive signaling for at least one candidate target physical cell identifier (PCI) of a candidate target cell that is configured to support mobility signaling at the physical PHY layer or medium access control (MAC) layer. Participating in the handover process of the target cell associated with one or more candidate target PCIs from the candidate target PCIs based on PHY layer or MAC layer mobility signaling; as well as The configuration for at least one cell group CG is modified, wherein one or more candidate target PCIs are associated with a component carrier CC of at least one CG, wherein the information for modifying the configuration is signaled to the UE via at least one of downlink control information DCI or MAC control element MAC-CE, and wherein the at least one processor modifies the configuration based on the signaling notification information.

2. The user equipment as claimed in claim 1, wherein, The at least one processor is further configured such that the UE: Receive signaling that pre-configures the UE with different configurations for at least one of CA or DC for individual CC or CG; and wherein: The information notified to the UE via signaling for modifying the configuration indicates at least one of the updated status or role of one or more CCs or CGs; The updated status includes at least one of the following: activated, deactivated, entered a cell, left a cell, in a cell group dormant state, or released; and The updated role for CC includes at least one of the following: primary cell PCell in MCG, primary / secondary cell PSCell in SCG, or secondary cell SCell in MCG or SCG.

3. The user equipment as described in claim 2, wherein, The at least one processor is further configured such that the UE: Applying a default state or role to one or more CCs or CGs for which an updated state or role has not been provided to the UE, wherein applying the default state or role for at least one of the CCs or CGs includes maintaining the current state or role.

4. The user equipment as claimed in claim 1, wherein, The at least one processor is further configured such that the UE: Receive a selection command notified via signaling from the PHY layer or the MAC layer, the selection command indicating the selection of one or more candidate target PCIs from the candidate target PCIs; as well as Receive an indication of a change to the configuration of at least one of carrier aggregation (CA) or dual connectivity (DC) for one or more individual CCs or CGs associated with one or more selected candidate target PCIs.

5. The user equipment as claimed in claim 4, wherein, The changes to the configuration include changes to at least one of the following: the number of CCs in the CG, the role of one or more CCs in the CG, or the role of the CG.

6. The user equipment as claimed in claim 4, wherein, The changes to the configuration include changes to at least one of the following: operating bandwidth, bandwidth portion BWP, synchronization signal block SSB, random access channel RACH, physical downlink control channel PDCCH, physical downlink shared channel PDSCH, physical uplink control channel PUCCH, or reference signal RS configuration.

7. The user equipment as claimed in claim 4, wherein, The at least one processor is further configured such that the UE: Receive signaling that pre-configures the UE with different configurations for at least one of CA or DC for individual CC or CG; as well as The configuration for at least one CG or CC may be modified occasionally based on one or more of the pre-configured configurations.

8. A network entity for wireless communication, comprising: At least one memory, which includes instructions; and At least one processor is configured to execute the instructions such that the network entity: Sending signaling to the user equipment (UE) to configure multiple candidate target physical cell identifiers (PCIs) of at least one candidate target cell that supports mobility signaling at the physical PHY layer or medium access control (MAC) layer; The handover process of the UE to the target cell associated with one or more candidate target PCIs from the candidate target PCIs is based on the mobility signaling of the PHY layer or MAC layer. as well as The configuration for at least one cell group CG is modified, wherein one or more candidate target PCIs are associated with a component carrier CC of at least one CG, wherein the information for modifying the configuration is signaled to the UE via at least one of downlink control information DCI or MAC control element MAC-CE, and wherein the configuration is modified based on the information signaled.

9. The network entity as described in claim 8, wherein, The at least one processor is further configured to cause the network entity to: Send signaling to the UE that pre-configures the UE with different configurations for at least one of CA or DC for individual CC or CG; And among them: The information notified to the UE via signaling for modifying the configuration indicates at least one of the updated status or role of one or more CCs or CGs; The updated status includes at least one of being activated, deactivated, entering a cell, leaving a cell, in a cell group dormant state, or being released; as well as The updated role for CC includes at least one of the following: primary cell PCell in primary cell group MCG, primary / secondary cell PSCell in secondary cell group SCG, or secondary cell SCell in MCG or SCG.

10. The network entity as claimed in claim 9, wherein, The at least one processor is further configured to cause the network entity to apply a default state or role to one or more CCs or CGs that have not provided an updated state or role to the UE, wherein applying the default state or role to at least one of the CCs or CGs includes maintaining the current state or role.

11. The network entity as claimed in claim 8, wherein, The at least one processor is further configured to cause the network entity to: Send a selection command via signaling notification through the PHY layer or the MAC layer, the selection command indicating the selection of one or more candidate target PCIs from the candidate target PCIs; as well as This indicates a change in the configuration for at least one of the carrier aggregation CA or dual connectivity DC for one or more individual CCs or CGs associated with one or more selected candidate target PCIs.

12. The network entity as claimed in claim 11, wherein, The changes to the configuration include changes to at least one of the following: the number of CCs in the CG, the role of one or more CCs in the CG, or the role of the CG.

13. The network entity as claimed in claim 11, wherein, The changes to the configuration include changes to at least one of the following: operating bandwidth, bandwidth portion BWP, synchronization signal block SSB, random access channel RACH, physical downlink control channel PDCCH, physical downlink shared channel PDSCH, physical uplink control channel PUCCH, or reference signal RS configuration.

14. The network entity as claimed in claim 11, wherein, The at least one processor is further configured to cause the network entity to: Send signaling that pre-configures the UE with different configurations for at least one of CA or DC for individual CC or CG; as well as The configuration for at least one CG or CC may be modified occasionally based on one or more of the pre-configured configurations.

15. A method for wireless communication by a user equipment (UE), comprising: Receive signaling for at least one candidate target physical cell identifier (PCI) of a candidate target cell that is configured to support mobility signaling at the physical PHY layer or medium access control (MAC) layer. Participating in the handover process of the target cell associated with one or more candidate target PCIs from the candidate target PCIs based on PHY layer or MAC layer mobility signaling; as well as The configuration for at least one cell group CG is modified, wherein one or more candidate target PCIs are associated with a component carrier CC of at least one CG, wherein the information for modifying the configuration is signaled to the UE via at least one of downlink control information DCI or MAC control element MAC-CE, and wherein the configuration is modified based on the information signaled.

16. A method for performing wireless communication by a network entity, comprising: Sending signaling to the user equipment (UE) to configure multiple candidate target physical cell identifiers (PCIs) of at least one candidate target cell that supports mobility signaling at the physical PHY layer or medium access control (MAC) layer; The handover process of the UE to the target cell associated with one or more candidate target PCIs from the candidate target PCIs is based on the mobility signaling of the PHY layer or MAC layer. as well as The configuration for at least one cell group CG is modified, wherein one or more candidate target PCIs are associated with a component carrier CC of at least one CG, wherein the information for modifying the configuration is signaled to the UE via at least one of downlink control information DCI or MAC control element MAC-CE, and wherein the configuration is modified based on the information signaled.

17. A computer-readable medium having program code recorded thereon, wherein the program code is executable by one or more processors of a user equipment (UE) to cause the one or more processors to perform the method of claim 15.

18. A computer-readable medium having program code recorded thereon, wherein the program code is executable by one or more processors of a network entity to cause the one or more processors to perform the method of claim 16.

19. A computer program product comprising computer-readable instructions that, when executed by a processor, cause the processor to perform the method of claim 15.

20. A computer program product comprising computer-readable instructions that, when executed by a processor, cause the processor to perform the method of claim 16.

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