Physical layer based mobility signaling

Abstract

Some aspects of the disclosure provide a method for wireless communication by a user equipment (UE). The method generally includes receiving radio resource control (RRC) signaling indicating a set of cells that support physical (PHY) layer or medium access control (MAC) layer mobility signaling, receiving at least one downlink control information (DCI) indicating mobility information for the set of cells, and updating one or more features of the set of cells based on the DCI.

Description

[0001] Priority requirements

[0002] This application claims priority to U.S. Application No. 17 / 365,885, filed July 1, 2021, and U.S. Provisional Application No. 62 / 047,725, filed July 2, 2020. The full contents of both applications are hereby expressly incorporated herein by reference, as fully set forth below and used for all applicable purposes. Technical Field

[0003] Various aspects of this disclosure relate to wireless communications, and more specifically, various aspects of this disclosure relate to mobility technologies that allow dynamic updating of a set of cells activated to serve a user equipment (UE) and associated information based on downlink control information (DCI). 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). 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., 5G NR) 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 increase in demand for mobile broadband access, further improvements to NR and LTE technologies are needed. Preferably, these improvements should be applicable to other multiple access technologies and telecommunications standards that use these technologies.

[0007] The control resource set (CORESET) for systems 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.) may be defined for a given UE. Summary of the Invention

[0008] The systems, methods, and apparatuses disclosed herein each have several innovative aspects, none of which individually is solely responsible for the desired properties.

[0009] Certain aspects of this disclosure relate to a method for wireless communication for a user equipment (UE). The method typically includes: receiving radio resource control (RRC) signaling indicating a set of cells supporting physical (PHY) layer or media access control (MAC) layer mobility signaling; receiving at least one downlink control information (DCI) indicating mobility information for the set of cells; and updating one or more characteristics of the set of cells based on the DCI.

[0010] Certain aspects of this disclosure relate to a method for wireless communication for a network entity. A method typically includes: sending a Radio Resource Control (RRC) signaling to a User Equipment (UE) indicating a set of cells supporting physical (PHY) layer or media access control (MAC) layer mobility signaling; sending at least one downlink control information (DCI) to the UE indicating mobility information for the set of cells; and communicating with the UE via a subset of activated cells having one or more characteristics of the set of cells updated based on the DCI.

[0011] Some aspects of this disclosure relate to an apparatus for wireless communication for a UE. The apparatus typically includes a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to: receive RRC signaling indicating a set of cells supporting PHY layer or MAC layer mobility signaling; receive at least one DCI indicating mobility information for the set of cells; and update one or more features of the set of cells based on the DCI.

[0012] Some aspects of this disclosure relate to an apparatus for wireless communication for a UE. The apparatus typically includes: a unit for receiving RRC signaling indicating a set of cells supporting PHY or MAC layer mobility signaling; a unit for receiving at least one DCI indicating mobility information for the set of cells; and a unit for updating one or more features of the set of cells based on the DCI.

[0013] Some aspects of this disclosure relate to a computer-readable medium having instructions stored thereon for: receiving RRC signaling indicating a set of cells supporting PHY or MAC layer mobility signaling; receiving at least one DCI indicating mobility information for the set of cells; and updating one or more features of the set of cells based on the DCI.

[0014] Some aspects of this disclosure relate to a method for wireless communication for a network entity. The method typically includes: sending RRC signaling to a UE, the signaling indicating a set of cells supporting PHY or MAC layer mobility signaling; sending at least one DCI to the UE indicating mobility information for the set of cells; and communicating with the UE via a subset of activated cells having one or more characteristics of the set of cells based on the DCI.

[0015] Some aspects of this disclosure relate to an apparatus for wireless communication via a network entity. The apparatus typically includes a memory and at least one processor coupled to the memory, the memory and the at least one processor being configured to: transmit RRC signaling to a UE, the signaling indicating a set of cells supporting PHY layer or MAC layer mobility signaling; transmit at least one DCI indicating mobility information for the set of cells to the UE; and communicate with the UE via a subset of activated cells having one or more characteristics of the set of cells based on the DCI.

[0016] Some aspects of this disclosure relate to an apparatus for wireless communication via a network entity. The apparatus typically includes: a unit for sending RRC signaling to a UE, the signaling indicating a set of cells supporting PHY or MAC layer mobility signaling; a unit for sending at least one DCI indicating mobility information for the set of cells to the UE; and a unit for communicating with the UE via a subset of activated cells having one or more characteristics of the set of cells based on the DCI.

[0017] Some aspects of this disclosure relate to a computer-readable medium having instructions stored thereon for: sending RRC signaling to a UE, the signaling indicating a set of cells supporting PHY or MAC layer mobility signaling; sending to the UE at least one DCI indicating mobility information for the set of cells; and communicating with the UE via a subset of the activated cells having one or more characteristics of the set of cells based on the DCI.

[0018] 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

[0019] Details of one or more implementations of the subject matter described in this disclosure are set forth in the accompanying drawings and the following description. However, the drawings illustrate only some typical aspects of this disclosure and should not be considered as limiting its scope. Other features, aspects, and advantages will become apparent from the description, figures, and claims.

[0020] Figure 1 An example wireless communication network in which some aspects of this disclosure can be implemented is shown.

[0021] Figure 2 Block diagrams illustrating example base stations (BS) and example user equipment (UE) are shown, illustrating some aspects of this disclosure.

[0022] Figure 3A An example of a frame format used in telecommunications systems is shown.

[0023] Figure 3B This demonstrates how different beams can be used to transmit different synchronization signal blocks (SSBs).

[0024] Figure 4 An example architecture in which aspects of this disclosure can be implemented is shown.

[0025] Figure 5 and Figure 6 Example scenarios are shown in which aspects of this disclosure can be practiced.

[0026] Figure 7A and Figure 7B Examples of UE mobility based on some aspects of this disclosure are shown.

[0027] Figure 8Example operation of wireless communication for a user equipment (UE) is shown, according to some aspects of this disclosure.

[0028] Figure 9 Example operations of wireless communication for network entities are shown, based on some aspects of this disclosure.

[0029] Figure 10A Examples of DCI selection for a cell are shown, based on some aspects of this disclosure.

[0030] Figure 10B Another example of DCI selection for a cell is shown, based on some aspects of this disclosure.

[0031] Figure 11 An example of a DCI update of system information (SI) in accordance with some aspects of this disclosure is shown.

[0032] Figure 12 and Figure 13 A communication device is shown that, according to aspects of this disclosure, may include various components configured to perform operations using the techniques disclosed herein.

[0033] For ease of understanding, the same reference numerals are used to indicate the same elements common to these figures where possible. Unless specifically described, it is contemplated that elements disclosed in one aspect may be advantageously used in other aspects. Detailed Implementation

[0034] Various aspects of this disclosure relate to wireless communications, and more specifically, to mobility technologies that allow dynamic updates to the set of cells and / or beams activated to serve a user equipment (UE). As will be described in more detail below, the set of active cells can be updated based on physical (PHY) layer (Layer 1 or L1) signaling (e.g., via DCI), which indicates one or more cells to be activated and / or deactivated. DCI can also indicate updates to various cell-related information (e.g., system information).

[0035] The following description provides examples and does not limit the scope, application, or examples set forth in the claims. The functions and arrangements of the elements discussed may be changed without departing from the scope of this application. Various examples may be omitted, substituted, or added as appropriate. For example, the described methods may be performed in a different order than described, and steps may be added, omitted, or combined. Furthermore, features described for some examples may be combined with certain other examples. For example, any number of aspects set forth herein may be used to implement an apparatus or method. Moreover, the scope of this disclosure is intended to cover such apparatus or methods practiced using structures, functions, or structures and functions other than those of the aspects of the disclosure presented herein, or different from those of the aspects of the disclosure presented herein. It should be understood that any aspect of the disclosure herein may be embodied by one or more elements of the claims.

[0036] In summary, any number of wireless networks can be deployed within 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, tone, subband, etc. Each frequency can support a single RAT within a given geographical area to avoid interference between wireless networks using different RATs. In some cases, 5G NR RAT networks can be deployed.

[0037] Figure 1 An example wireless communication network 100 in which aspects of this disclosure can be implemented is shown. For example, such as... Figure 1 As shown, UE 120a may include an L1 / L2 mobility module 122, which can be configured to perform (or cause UE 120a to perform). Figure 8 Operation 800. Similarly, BS 110a may include L1 / L2 mobility module 112, which can be configured to perform (or cause BS 110a to perform). Figure 9 Operation 900.

[0038] NR access (e.g., 5G NR) can support a variety of wireless communication services, such as enhanced mobile broadband (eMBB) for wide bandwidth (e.g., 80 MHz or above), millimeter wave (mW) for high carrier frequencies (e.g., 25 GHz or above), massive machine-type communication (mMTC) for non-backward-compatible MTC technologies, or mission-critical services for ultra-reliable low-latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTI) to meet corresponding quality of service (QoS) requirements. Furthermore, these services can coexist in the same time-domain resources (e.g., time slots or subframes) or frequency-domain resources (e.g., component carriers).

[0039] like Figure 1 As shown, the wireless communication network 100 may include multiple base stations (BSs) 110a-z (each base station is also individually referred to as BS 110 or collectively as BS 110 herein) and other network entities. BS 110 can provide communication coverage for a specific geographic area (sometimes referred to as a “cell”), and may be stationary or mobile depending on the location of the mobile BS 110. In some examples, BS 110 may be interconnected to each other or to one or more other BSs or network nodes (not shown) within 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, BS 110a, 110b, and 110c can be macro BSs of macro cells 102a, 102b, and 102c, respectively. BS 110x can be a pico BS of pico cell 102x. BS 110y and 110z can be femto BSs of femto cells 102y and 102z, respectively. A BS can support one or more cells. BS 110 communicates with user equipment (UEs) 120a-y (also referred to individually herein as UE 120 or collectively as UE 120) in the wireless communication network 100. UE 120 (e.g., 120x, 120y, etc.) can be distributed throughout the wireless communication network 100, and each UE 120 can be fixed or mobile.

[0040] The wireless communication network 100 may also include relay stations (e.g., relay station 110r), also referred to as relay stations, which receive data or other information transmissions from upstream stations (e.g., BS 110a or UE 120r) and send data or other information transmissions to downstream stations (e.g., UE 120 or BS 110), or relay transmissions between UEs 120 to facilitate communication between devices.

[0041] Network controller 130 can be coupled to a set of BS 110s and provide coordination and control for these BS 110s. Network controller 130 can communicate with the BS 110s via backhaul. The BS 110s can also communicate with each other, for example, directly or indirectly via wireless or wired backhaul.

[0042] Figure 2 Block diagrams illustrating example base stations (BS) and example user equipment (UE) are shown, illustrating some aspects of this disclosure.

[0043] At BS 110, the transmit processor 220 can receive data from data source 212 and control information from controller / processor 240. The 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 (GCPDCCH), etc. The processor 220 can process the data and control information (e.g., perform encoding and symbol mapping) to obtain data symbols and control symbols respectively. The transmit processor 220 can also generate reference symbols (e.g., for the Primary Synchronization Signal (PSS), Secondary Synchronization Signal (SSS)) and Cell-Specific Reference Signal (CRS). Where applicable, the transmit (TX) Multiple-Input Multiple-Output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, or reference symbols, and can provide an output symbol stream to modulators (MODs) 232a-232t. Each modulator 232 can process its own output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator can further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signal from modulators 232a-232t can be transmitted via antennas 234a-234t respectively.

[0044] At UE 120, antennas 252a-252r can receive downlink signals from BS 110 and can provide the received signals to demodulators (DEMODs) in transceivers 254a-254r respectively. Each demodulator 254 can adjust (e.g., filter, amplify, down-convert, and digitize) its received signal to obtain an input sample. Each demodulator can further process the input sample (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 can obtain the received symbols from all demodulators 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 120 to data sink 260, and provide decoded control information to controller / processor 280.

[0045] On the uplink, at UE 120, transmit processor 264 can receive and process data from data source 262 (e.g., for the Physical Uplink Shared Channel (PUSCH)) and control information from controller / processor 280 (e.g., for the Physical Uplink Control Channel (PUCCH)). Transmit processor 264 can also generate reference symbols for reference signals (e.g., for Sounding Reference Signals (SRS)). Symbols from transmit processor 264 can be pre-encoded by TX MIMO processor 266, further processed by demodulators in transceivers 254a-254r (e.g., for SC-FDM, etc.), and transmitted to BS 110. At BS 110, uplink signals from UE 120 can be received by antenna 234, processed by modulator 232, detected by MIMO detector 236 (if applicable), and further processed by receive processor 238 to obtain decoded data and control information transmitted by UE 120. The receiver processor 238 can provide decoded data to the data sink 239 and provide decoded control information to the controller / processor 240.

[0046] Memory 242 and 282 can store data and program code for BS 110 and UE 120, respectively. Scheduler 244 can schedule UEs for data transmission on the downlink or uplink.

[0047] The processing controller / processor 280 or other processors and modules at UE 120 can execute or direct the execution of processes specific to the techniques described herein. For example... Figure 2 As shown, the controller / processor 280 of UE 120 has an L1 / L2 mobility module 122, which can be configured to perform (or cause UE 120 to perform). Figure 8Operation 800. Similarly, BS 110a may include L1 / L2 mobility module 112, which can be configured to perform (or cause BS 110a to perform). Figure 9 Operation 900.

[0048] Figure 3A This is a diagram illustrating an example of frame format 300 for NR. The transmission timeline for each of the downlink and uplink can be divided into radio frame units. 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 is 1 ms long. Each subframe can include a variable number of time slots, depending on the subcarrier spacing. Each time slot can include a variable number of symbol periods (e.g., 7 or 14 symbols), depending on the subcarrier spacing. An index can be assigned to the symbol periods in each time slot. A micro-slot (which may be referred to as a sub-slot structure) refers to a transmission time interval with a duration less than a time slot (e.g., 2, 3, or 4 symbols).

[0049] Each symbol in a time slot can indicate the link direction of data transmission (e.g., DL, UL, or flexible), and the link direction can be dynamically switched for each subframe. The link direction can be based on the time slot format. Each time slot can include DL / UL data as well as DL / UL control information.

[0050] In NR, a synchronization signal (SS) block is transmitted. The SS block includes the PSS, SSS, and two symbols, PBCH. This can be done at a fixed time slot location (e.g., ...). Figure 3A Symbols 0-3 (shown) transmit SS blocks. PSS and SSS can be used by the UE for cell search and cell acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identification. PBCH carries some basic system information, such as downlink system bandwidth, timing information within radio frames, SS burst set periodicity, system frame number, etc. SS blocks can be organized into SS bursts to support beam scanning. Other system information (e.g., Residual Minimum System Information (RMSI), System Information Block (SIB), Other System Information (OSI)) can be transmitted on the Physical Downlink Shared Channel (PDSCH) in certain subframes. Up to 64 SS blocks can be transmitted, for example, up to 64 different beam directions for mmW. Up to 64 transmissions of SS blocks are called SS burst sets. SS blocks in an SS burst set are transmitted in the same frequency region, while SS blocks in different SS burst sets can be transmitted at different frequency locations.

[0051] like Figure 3BAs shown, SS blocks can be organized into SS burst sets to support beam scanning. Different beams can be used to transmit each SSB in the burst set, which helps the UE quickly acquire both transmit (Tx) and receive (Rx) beams (especially for mmW applications). The Physical Unit Identifier (PCI) can still be decoded from the SSB's PSS and SSS.

[0052] A control resource set (CORESET) for systems 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.) may be defined for a given UE. According to some 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 may include a fixed number (e.g., twelve) of tones in a symbol period (e.g., a symbol period of a time slot), where one tone in a symbol period is called a resource element (RE). The fixed number of REGs may be contained in control channel elements (CCEs). A set of CCEs may be used to transmit new radio PDCCHs (NR-PDCCHs), where different numbers of CCEs in the set are used to transmit NR-PDCCHs using different aggregation levels. Multiple CCE sets can be defined as the UE's search space. Therefore, Node B or other base stations can send NR-PDCCH to the UE by sending NR-PDCCH in the CCE set, which is defined as a decoding candidate within the UE's search space. The UE can receive NR-PDCCH by searching for the UE in the search space and decoding the NR-PDCCH sent by Node B.

[0053] Example methods for physical layer-based mobility signaling

[0054] Various aspects of this disclosure relate to wireless communications, and more specifically, to mobility technologies that allow dynamic updates to a set of cells and / or beams activated to serve a user equipment (UE). As will be described in more detail below, the set of active cells can be updated based on physical (PHY) layer (Layer 1 or L1) or media access control (MAC) layer (Layer 2 or L2) signaling, which indicates one or more cells and / or beams to be activated and / or deactivated.

[0055] The techniques presented in this paper can be applied to various frequency bands used in new radio (NR). For example, for the higher frequency bands known as Frequency Range (FR) 4 (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 resist severe phase noise. Due to the large subcarrier spacing, the time slot length tends to be very short. In the lower frequency band with a 120 kHz SCS (known as FR2 (24.25 GHz to 52.6 GHz)), the time slot length is 125 μs, while in FR4 with 960 kHz, the time slot length is 15.6 μs.

[0056] In multi-beam operations (e.g., involving FR1 and FR2 bands), more efficient uplink / downlink beam management can enable increased intra-cell and inter-cell mobility (e.g., L1 and / or L2-centric mobility) and / or a greater number of Transport Configuration Indicator (TCI) states. For example, TCI states may include the transmission and reception of data and control for uplink and downlink operations using a common beam, unified TCI frames for uplink and downlink beam indication, and enhanced signaling mechanisms (e.g., dynamic use of control signaling) to improve latency and efficiency.

[0057] The techniques described 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 physical layer (PHY, Layer 1, or L1) or media access control (MAC, Layer 2, or L2) signaling instead of higher layer (e.g., RRC) signaling.

[0058] Figure 4 An example architecture in which aspects of this disclosure can be practiced is shown. As illustrated, the architecture includes a gNB Central Unit (gNB-CU). The gNB-CU typically acts as a logical node for managing the RRC, Service Data Adaptation Protocol (SDAP), and Packet Data Convergence Protocol (PDCP) of the gNB that controls the operation of one or more gNB Distributed Units (gNB-DUs). As shown, the gNB-CU terminates its connection to the gNB-DU via an F1 interface.

[0059] gNB-DU typically acts as a logical node hosting the RLC, MAC, and PHY layers of the gNB, and its operation is controlled by gNB-CU. For example... Figure 5 and Figure 6 As shown, one gNB-DU supports one or more units (but each unit is supported by only one gNB-DU). The gNB-DU terminates the F1 interface connected to the gNB-CU.

[0060] Figure 5 and Figure 6 Example scenarios are shown in which aspects of this disclosure can be practiced.

[0061] like Figure 5 As shown, in some cases, a UE can handover between (source and target) cells supported by different DUs (radio units or RUs) under the same CU. The RU typically contains only PHY layer logic. Figure 5 In this scenario, units can have non-co-located (in different DUs) PHY, MAC, and RLC logic, but share common PDCP and RRC logic (within the same 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 DUs.

[0062] On the other hand, Figure 6 In the scenario shown, the source and target cells are supported by the same DU (belonging to the same DU). Therefore, L1 / L2 mobility may be particularly attractive in this case because the cells can share the MAC and upper layers (the same DU). In this situation, when a handover is performed via L1 / L2 signaling, the data path above the MAC remains unchanged.

[0063] As described above, the distributed RU contains only the PHY layer and can be used in a manner similar to carrier aggregation (CA) (activation / deactivation), but the cells can be located on the same carrier frequency. Therefore, however, various aspects of this disclosure can utilize mechanisms similar to those used in CA to achieve L1 / L2 mobility (e.g., activating / deactivating cells to serve the UE).

[0064] As an initial step, RRC signaling can be used to configure the cell set for L1 / L2 mobility. For illustrative purposes, Figure 7A An example is shown, assuming a configuration of a set of 8 cells (cell 1, cell 2, ..., cell 8). Typically, the cell set can be designed to be large enough to cover meaningful mobility (e.g., the expected movement of the UE within a given area and time). As described below, mobility management can be performed by activating / deactivating cells in the set, such that a subset of cells is activated to serve the UE.

[0065] From the configured set, a subset of cells can be activated at any given time to serve the UE. This active cell set typically refers to one or more cells that are active within the configured set. If the active cell set includes two or more active cells, the UE can switch from one active cell to another via dynamic (PHY / MAC) signaling. In some cases, the active set may contain only one cell, such that when signaling for activating a new cell is received, the currently active serving cell can be added to the deactivated set. In other words, in such active serving cell handover scenarios, only one active serving cell may be available at a time.

[0066] Refer again Figure 7A The set of active cells includes cells 2-4. In some cases, the cells activated for any given UE may depend on the measurements reported by the UE. Inactive configured cells (e.g., the set of deactivated cells) may include the group of (remaining) cells that have been deactivated (not activated) from the configured set. Figure 7A In the middle, the set of deactivated cells includes cell 1 and cells 5-8.

[0067] Various aspects of this disclosure can provide mobility for active cells within an active cell set. In some cases, the signaling mechanism can be similar to beam management. For example, mobility management within an active set can be performed via L1 / L2 signaling, which is used to activate / deactivate cells in the active and deactivated cell sets to select beams within the active cells.

[0068] like Figure 7B As shown, when a UE moves, cells from that set are deactivated and activated, for example, based on signal quality (measurements reported by the UE) and other considerations (e.g., cell load). Figure 9 In the example shown in B, when the UE moves from left (time t1) to right (time t2), cell 5 (now closer) is activated, and cell 2 (now farther away) is deactivated. Therefore, after this move, the set of activated cells includes cell 3, cell 4, and cell 5.

[0069] Cells activated / deactivated by L1 / L2 signaling can be based on network control, UE recommendations, and / or UE decisions. Typically, L1 / L2 signals (e.g., DCI and / or MAC-CE) can carry activation and / or deactivation commands (e.g., indicating which cells to activate and which to deactivate).

[0070] If a UE can only support one active cell at a time, the activation command for a new cell may implicitly deactivate the currently active cell (e.g., when the UE acknowledges the command). As described above, when the active set contains only one cell, the currently active serving cell can be added to the deactivated set when signaling for activating a new cell is received.

[0071] Various aspects of this disclosure can provide mobility within a set of cells using physical layer (L1) mobility signaling.

[0072] Figure 8 Example operation 800, which can be performed by a UE to identify an initial beam for communication with a cell selected in L1-based mobility, is shown according to certain aspects of this disclosure. Operation 800 can be performed, for example, by... Figure 1 The UE 120 shown is executed.

[0073] Operation 800 begins at 802 by receiving RRC signaling indicating a set of cells supporting PHY or MAC layer mobility. For example, the UE can be configured with a set of cells supporting physical layer mobility via RRC signaling, such as... Figure 7A and Figure 7B As shown in the example.

[0074] At 804, the UE receives at least one downlink control information (DCI) indicating mobility information for the cell set. At 806, the UE updates one or more features of the cell set based on the DCI. For example, such as... Figure 10A and Figure 10B As shown, DCI can indicate one or more of the configured cells to be activated or deactivated. As another example, such as... Figure 11 As shown, DCI can select a set of system information (SI) values ​​from different sets pre-configured via RRC signaling.

[0075] Figure 9 It shows what can be considered to be related to Figure 8 Example operation 900 is complementary to operation 800. For example, operation 900 can be performed by a network entity (e.g., gNB DU / CU) to dynamically activate the cell and select a beam to support UE mobility (execution). Figure 8 Operation 800).

[0076] Operation 900 begins at 902 by sending a UE Radio Resource Control (RRC) signaling indicating a set of cells supporting PHY or MAC layer mobility. At 904, the network entity sends at least one DCI to the UE indicating mobility information for the cell set. At 906, the network entity communicates with the UE via a subset of activated cells having one or more characteristics of the cell set updated based on the DCI.

[0077] You can refer to this. Figure 10A , Figure 10B and Figure 11 Further understanding Figure 8 and Figure 9 Operations 800 and 900, Figure 10A , Figure 10B and Figure 11 Examples of DCI-based mobility signaling are shown in accordance with various aspects of this disclosure.

[0078] like Figure 10A and Figure 10B As shown, in some cases, the new DCI format can at least convey the ID information of the cells to be activated and / or deactivated from the configured set of cells.

[0079] like Figure 10A As shown, the DCI may include a field with one or more bits (e.g., Cell_ID_Select), which serves as a pointer to one of the cell IDs in the set of cells configured by the RRC. Continuing... Figure 7A and Figure 7B The example shown assumes a configuration set with 8 cells, where a 3-bit field can be used to indicate which cell to activate or deactivate. For example, Figure 10A The DCI shown may have been... Figure 7B The UE receives cell ID 5 at time t2. In some cases, additional bits can indicate whether the identified cell is active or deactivated, or the indication can be implicit (e.g., if the identified cell is not active, the UE can implicitly determine that the DCI is used for activation).

[0080] like Figure 10B As shown, the DCI can include a bitmap, where each bit corresponds to one of the cell IDs in the set of cells configured by the RRC. Although the bitmap represents relative to... Figure 10A While there is additional overhead associated with the selection field, one advantage is that the bitmap can indicate multiple cells to be activated and / or deactivated. In the illustrated example, a value of 1 in the bitmap indicates the corresponding cell to be activated (or kept active), while a value of 0 in the bitmap indicates the corresponding cell to be deactivated (or kept deactivated).

[0081] like Figure 11 As shown, in some cases, a DCI with mobility signaling can be used to update the system information (SI) of one or more cells in a set. In the illustrated example, the DCI may have a field that is used to activate or deactivate a set of SI values ​​from different sets of SI values ​​pre-configured via RRC signaling.

[0082] In some cases, SI Information Elements (IEs) eligible for updating (e.g., via physical layer signaling) can be arranged in a predefined order (at configuration time). For example, this can allow these IEs to be addressed based on their number or via a bitmap in the DCI.

[0083] In addition, or alternatively, DCI can activate some other RRC pre-configuration options for these cells when activating one or more cells. These options may, for example, involve Timing Advance Group (TAG) Timing Advance (TA) information, measurement configuration, and / or updates or changes to the primary cell (PCell). In this way, the required pre-configuration options for a cell can be activated when the cell is activated.

[0084] In some cases, a DCI (or some DCIs) used for mobility signaling may carry one type of information, or may be designed to carry multiple types of information within the context of (L1 / L2) mobility for cells in a configured set. For example, one type of DCI may allow SI updates, while another type of DCI may allow measurement and TAG information changes.

[0085] In some cases, if a larger payload is required, a two-stage DCI can be used. In this case, the first DCI can specify what information is provided in the second DCI.

[0086] For reliability, the UE may need to acknowledge the DCI. In other words, in this case, instead of waiting for acknowledgment of the actual transmission scheduled by the DCI, the UE acknowledges the DCI itself, allowing the network to know that the UE has received the corresponding update for the cell. In some cases, the update may not be applied until acknowledgment is received.

[0087] In some cases, the L2-based signaling described herein can be combined with L1-based signaling. This may involve, for example, activating a subset of cells via L2 signaling and indicating mobility information within the subset via downlink control information (DCI) (e.g., activating / deactivating and / or updating relevant features).

[0088] Example communication device

[0089] Figure 12 A communication device 1200 is shown, which may include operations configured to perform the techniques disclosed herein (such as...). Figure 8 Various components (e.g., corresponding to unit plus functional components) are shown in the diagram. The communication device 1200 includes a processing system 1202 coupled to a transceiver 1208. The transceiver 1208 is configured to transmit and receive signals from the communication device 1200 via an antenna 1210, such as the various signals described herein. The processing system 1202 can be configured to perform processing functions of the communication device 1200, including processing signals received by and / or to be transmitted by the communication device 1200.

[0090] Processing system 1202 includes processor 1204 coupled to computer-readable medium / memory 1212 via bus 1206. In some aspects, computer-readable medium / memory 1212 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 1204, cause processor 1204 to perform... Figure 8 The operations shown and / or other operations used to perform the various techniques discussed herein. In some aspects, the computer-readable medium / memory 1212 stores: code 1214 for receiving Radio Resource Control (RRC) signaling indicating a set of cells supporting physical (PHY) layer or media access control (MAC) layer mobility signaling; code 1216 for receiving at least one DCI indicating mobility information for the set of cells; and code 1218 for updating one or more features of the set of cells based on the DCI. In some aspects, the processor 1204 has circuitry configured to implement the code stored in the computer-readable medium / memory 1212. The processor 1204 includes: circuitry 1220 for receiving RRC signaling indicating a set of cells supporting PHY layer or MAC layer mobility signaling; circuitry 1222 for receiving at least one DCI indicating mobility information for the set of cells; and circuitry 1224 for updating one or more features of the set of cells based on the DCI.

[0091] Figure 13 A communication device 1300 is shown, which may include operations configured to perform the techniques disclosed herein (such as...). Figure 9 Various components (e.g., corresponding to unit plus functional components) are shown in the diagram. The communication device 1300 includes a processing system 1302 coupled to a transceiver 1308. The transceiver 1308 is configured to transmit and receive signals from the communication device 1300 via an antenna 1310, such as the various signals described herein. The processing system 1302 can be configured to perform processing functions of the communication device 1300, including processing signals received by and / or to be transmitted by the communication device 1300.

[0092] Processing system 1302 includes processor 1304 coupled to computer-readable medium / memory 1312 via bus 1306. In some aspects, computer-readable medium / memory 1312 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 1304, cause processor 1304 to perform... Figure 9 The operations shown and / or other operations used to perform the various techniques discussed herein. In some aspects, the computer-readable medium / memory 1312 stores: code 1314 for sending RRC signaling to the UE, the signaling indicating a set of cells supporting PHY layer or MAC layer mobility signaling; code 1316 for sending to the UE at least one DCI indicating mobility information for the cell set; and code 1318 for communicating with the UE via a subset of activated cells having one or more characteristics of the DCI-based cell set. In some aspects, the processor 1304 has circuitry configured to implement the code stored in the computer-readable medium / memory 1312. The processor 1304 includes: circuitry 1320 for sending RRC signaling to the UE, the signaling indicating a set of cells supporting PHY layer or MAC layer mobility signaling; circuitry 1322 for sending to the UE at least one DCI indicating mobility information for the cell set; and circuitry 1324 for communicating with the UE via a subset of activated cells having one or more characteristics of the DCI-based cell set.

[0093] Example

[0094] Aspect 1: A method for wireless communication for a user equipment (UE), comprising: receiving radio resource control (RRC) signaling, the RRC signaling indicating a set of cells supporting physical (PHY) layer or medium access control (MAC) layer mobility signaling; receiving at least one downlink control information (DCI) indicating mobility information for the set of cells; and updating one or more features of the set of cells based on the DCI.

[0095] Aspect 2: According to the method of aspect 1, wherein the set of cells is supported by one or more distributed units (DUs) under a common central unit (CU).

[0096] Aspect 3: According to the method of aspect 2, wherein the one or more DUs include a common DU supporting each cell in the cell set.

[0097] Aspect 4: The method according to any of Aspects 1-3, wherein the DCI indicates at least one of the following: the identifier (ID) of a cell to be activated that is not currently activated for serving the UE in the subset of cells, or the ID of a cell to be deactivated in the subset of cells.

[0098] Aspect 5: According to the method of aspect 4, wherein the DCI includes a field pointing to the ID of the cell to be activated or deactivated in a table or list configured by the RRC signaling.

[0099] Aspect 6: The method according to any of aspects 1-5, wherein the DCI indicates an update of the system information (SI) of one or more cells in the set.

[0100] Aspect 7: According to the method of aspect 6, wherein the RRC signaling configures one or more SI value sets; and the DCI indicates the update of the SI by deactivating or activating at least one of the SI value sets in the SI value set.

[0101] Aspect 8: The method according to any of Aspects 1-7, wherein one or more SI information elements (IEs) eligible for updating via the DCI appear in a predefined order and are addressed based on at least one of the numbers or bitmaps in the DCI CE.

[0102] Aspect 9: The method according to any of Aspects 1-8, wherein the RRC signaling indicates one or more sets of options for cells in the set; and the DCI activates one or more sets of options for cells upon activation.

[0103] Aspect 10: The method according to aspect 9, wherein at least some of the options involve: timing advance group (TAG) timing advance (TA) information, measurement configuration, or updating or changing the primary cell (PCell).

[0104] Aspect 11: The method according to any of aspects 1-10, wherein the format of the DCI depends at least in part on one or more types of the information being conveyed.

[0105] Aspect 12: The method according to any of aspects 1-11, wherein the at least one DCI includes at least a first DCI and a second DCI; and the first DCI indicates one or more types of information provided in the second DCI.

[0106] Aspect 13: The method according to any one of aspects 1-12 further includes: sending an acknowledgment of the at least one DCI.

[0107] Aspect 14: A method for wireless communication for a network entity, comprising: sending a Radio Resource Control (RRC) signaling to a User Equipment (UE), the RRC signaling indicating a set of cells supporting physical (PHY) layer or media access control (MAC) layer mobility signaling; sending at least one downlink control information (DCI) to the UE indicating mobility information for the set of cells; and communicating with the UE via a subset of the activated cells having one or more characteristics of the set of cells updated based on the DCI.

[0108] Aspect 15: The method according to aspect 14, wherein the set of cells is supported by one or more distributed units (DUs) under a common central unit (CU).

[0109] Aspect 16: The method according to aspect 15, wherein the one or more DUs include a common DU supporting each cell in the cell set.

[0110] Aspect 17: The method according to any of aspects 14-16, wherein the DCI indicates at least one of the following: the identifier (ID) of a cell to be activated that is not currently activated for serving the UE in the subset of cells, or the ID of a cell to be deactivated in the subset of cells.

[0111] Aspect 18: The method according to aspect 17, wherein the DCI includes: a field pointing to the ID of the cell to be activated or deactivated in a table or list configured by the RRC signaling.

[0112] Aspect 19: The method according to aspects 14-18, wherein the DCI indicates an update of the system information (SI) of one or more cells in the set.

[0113] Aspect 20: The method according to aspect 19, wherein the RRC signaling configures one or more sets of SI values; and the DCI indicates the update of the SI by deactivating or activating at least one of the sets of SI values ​​in the set of SI values.

[0114] Aspect 21: The method according to aspects 14-20, wherein one or more SI information elements (IEs) eligible for updating via the DCI appear in a predefined order and are addressed based on at least one of the numbers or bitmaps in the DCI CE.

[0115] Aspect 22: The method according to aspects 14-21, wherein the RRC signaling indicates one or more sets of options for cells in the set; and the DCI activates one or more sets of options for cells upon activation.

[0116] Aspect 23: The method according to aspect 22, wherein at least some of the options involve: timing advance group (TAG) timing advance (TA) information, measurement configuration, or updating or changing the primary cell (PCell).

[0117] Aspect 24: The method according to aspects 14-23, wherein the format of the DCI depends at least in part on one or more types of the information being conveyed.

[0118] Aspect 25: The method according to aspects 14-24, wherein the at least one DCI includes at least a first DCI and a second DCI; and the first DCI indicates one or more types of information provided in the second DCI.

[0119] Aspect 26: The method according to aspects 14-25 further includes: receiving an acknowledgment from the UE for the at least one DCI; and updating the one or more features of the cell set only after receiving the acknowledgment.

[0120] Aspect 27: An apparatus for wireless communication for a user equipment (UE), comprising: a unit for receiving radio resource control (RRC) signaling, the RRC signaling indicating a set of cells supporting physical (PHY) layer or medium access control (MAC) layer mobility signaling; a unit for receiving at least one downlink control information (DCI) indicating mobility information for the set of cells; and a unit for updating one or more features of the set of cells based on the DCI.

[0121] Aspect 28: An apparatus for wireless communication for a network entity, comprising: a unit for transmitting Radio Resource Control (RRC) signaling to a User Equipment (UE), the RRC signaling indicating a set of cells supporting physical (PHY) layer or media access control (MAC) layer mobility signaling; a unit for transmitting at least one downlink control information (DCI) to the UE indicating mobility information for the set of cells; and a unit for communicating with the UE via a subset of the activated cells having one or more characteristics of the set of cells updated based on the DCI.

[0122] Aspect 29: An apparatus for wireless communication for a user equipment (UE), comprising: a receiver configured to: receive radio resource control (RRC) signaling indicating a set of cells supporting physical (PHY) layer or medium access control (MAC) layer mobility signaling; and receive at least one downlink control information (DCI) indicating mobility information for the set of cells; and at least one processor configured to: update one or more features of the set of cells based on the DCI.

[0123] Aspect 30: An apparatus for wireless communication for a network entity, comprising: a transmitter configured to: transmit Radio Resource Control (RRC) signaling to a User Equipment (UE), the RRC signaling indicating a set of cells supporting physical (PHY) layer or media access control (MAC) layer mobility signaling; and transmit to the UE at least one downlink control information (DCI) indicating mobility information for the set of cells; and at least one processor configured to: communicate with the UE via an activated subset of the cells having one or more characteristics of the set of cells updated based on the DCI.

[0124] 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), LTE-A Advanced (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 generally used interchangeably. CDMA networks can implement wireless technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers the IS-2000, IS-95, and IS-856 standards. TDMA networks can implement wireless technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement wireless 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 OFDM. UTRA and E-UTRA are components 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 provided by 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 under development.

[0125] The techniques described herein can be used in the wireless networks and wireless technologies mentioned above, as well as other wireless networks and wireless technologies. For clarity, although terms commonly associated with 3G, 4G, or 5G wireless technologies may be used to describe various aspects herein, aspects of this disclosure can be applied to other generation-based communication systems.

[0126] In 3GPP, the term "cell" can refer to the coverage area of ​​a Node B (NB) or the NB subsystem serving that coverage area, depending on the context in which it is used. In NR systems, the term "cell" can be used interchangeably with BS, Next-Generation NodeB (gNB or gNodeB) Access Point (AP), Distributed Unit (DU), carrier, or Transmitter Receiver Point (TRP). A BS can provide communication coverage for macrocells, picocells, femtocells, or other types of cells. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and allows unrestricted access for UEs with service subscriptions. A picocell can cover a relatively small geographic area and allow unrestricted access for UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a home) and allow restricted access for UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users at home, etc.). A BS for a macrocell can be referred to as a macro BS. A BS for a picocell can be referred to as a pico BS. A femtocell BS can be referred to as a femtocell BS or a home BS.

[0127] A UE can also be referred to as a mobile station, terminal, access terminal, user 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 equipment, 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, 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 eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that can communicate with a BS, another device (e.g., a remote device), or some other entity. Wireless nodes can provide, for example, connections 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.

[0128] Some wireless networks (e.g., LTE) utilize Orthogonal Frequency Division Multiplexing (OFDM) on the downlink and Single-Carrier Frequency Division Multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bands, etc. Data can be used to modulate each subcarrier. Generally, OFDM is used to transmit modulation symbols in the frequency domain and SC-FDM is used in the time domain. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers (K) can depend on the system bandwidth. For example, with a subcarrier spacing of 15 kHz, the minimum resource allocation (called a "resource block" (RB)) is 12 subcarriers (or 180 kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, the nominal Fast Fourier Transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth can also be divided into subbands. For example, a subband can cover 1.08 MHz (e.g., 6 RBs), and for system bandwidths of 1.25, 2.5, 5, 10, or 20 MHz, there can be 1, 2, 4, 8, or 16 subbands respectively. In LTE, the basic transmission time interval (TTI) or packet duration is a 1 ms subframe.

[0129] NR can utilize OFDM with CP on both uplink and downlink, and includes the use of TDD to support half-duplex operation. In NR, subframes are still 1ms, but the basic TTI is called a slot. Subframes contain a variable number of slots (e.g., 1, 2, 4, 8, 16, ... slots), depending on the subcarrier spacing. NR RBs are 12 consecutive frequency subcarriers. NR can support a basic subcarrier spacing of 15kHz, and other subcarrier spacings can be defined relative to the basic subcarrier spacing, such as 30kHz, 60kHz, 120kHz, 240kHz, etc. Symbol and slot lengths are proportional to the subcarrier spacing. CP length also depends on the subcarrier spacing. Beamforming can be supported, and beam direction can be dynamically configured. MIMO transmission with precoding can also be supported. In some examples, MIMO configurations in DL can support up to 8 transmit antennas with up to 8 streams in multilayer DL transmission and up to 2 streams per UE. In some examples, multilayer transmission with up to 2 streams per UE can be supported. It can support aggregation of multiple cells with up to 8 service cells.

[0130] In some examples, access to the air interface can be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication between some or all devices and equipment within its service area or cell. The scheduling entity can be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, the subordinate entities use 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 be used 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 the UE for wireless communication. In some examples, a UE can be used as a scheduling entity in a peer-to-peer (P2P) network or a mesh network. In the mesh network example, in addition to communicating with a scheduling entity, UEs can communicate directly with each other.

[0131] As used herein, the term "determine" can include one or more of a variety of actions. For example, "determine" can include calculation, operation, processing, deduction, investigation, lookup (e.g., searching in a table, database, or other data structure), hypothesis, 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 resolving, selecting, choosing, establishing, etc.

[0132] As used herein, unless otherwise expressly stated, the use of “or” is intended to be interpreted in an inclusive sense. For example, “a or b” could include only a, only b, or a combination of a and b. As used herein, phrases referring to “at least one” or “one or more” in a list of items refer to any combination of those items, including a single member. For example, “at least one of a, b, or c” is intended to cover the possibilities of only a, only b, only c, a combination of a and b, a combination of a and c, a combination of b and c, and a combination of a, b, and c.

[0133] The various operations described above can be performed by any suitable unit capable of performing the corresponding function. These units may include various hardware and / or software components and / or modules, including but not limited to circuits, application-specific integrated circuits (ASICs), or processors. Typically, when the operations shown in the accompanying drawings are present, those operations may have corresponding units plus functional components. For example, Figure 8 and Figure 9 The various operations shown can be performed by Figure 2 The various processors shown execute this.

[0134] The various illustrative logic blocks, modules, and circuits described herein can be implemented or executed using a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (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 can be a microprocessor, or it can be any commercially available processor, controller, microcontroller, or state machine. The processor can 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.

[0135] If implemented in hardware, an exemplary hardware configuration may include a processing system in a wireless node. This processing system can be implemented using a bus architecture. The bus may include any number of interconnect buses and bridges, depending on the specific application and overall design constraints of the processing system. The bus can link various circuits together, including processors, machine-readable media, and bus interfaces. The bus interface can be used to connect network adapters and others to the processing system via the bus. The network adapter can be used to implement signal processing functions at the PHY layer. In UE 120 (see...) Figure 1 In this case, the user interface (e.g., buttons, display, mouse, joystick, etc.) can also be connected to the bus. The bus can also link various other circuits, such as timing sources, peripheral devices, voltage regulators, power management circuits, etc., which are well known in the art and will not be described further. The processor can be implemented using one or more general-purpose processors 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 described functions for the processing system can be optimally implemented, depending on the specific application and the overall design constraints imposed on the system.

[0136] If implemented in software, the functionality can be stored or transmitted on a computer-readable medium as one or more instructions or code. Software should be broadly interpreted as instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. 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 location to another. The processor may be responsible for managing the bus and general processing, including the execution of 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 with 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 an integral part of the processor, such as in cases involving caches and / or general-purpose register files. Examples of machine-readable storage media may include, for example, 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 disks, or any other storage media or any combination thereof. Machine-readable media may be embodied in a computer program product.

[0137] Software modules can comprise a single instruction or multiple instructions, and can be distributed across multiple different code segments, different programs, and across multiple storage media. Computer-readable media can include multiple software modules. Software modules comprise instructions that, when executed by a device such as a processor, enable the processing system to perform various functions. Software modules can include send and receive modules. Each software module can reside in a single storage device or can be distributed across multiple storage devices. For example, when a trigger event occurs, a software module can be loaded from a hard disk drive into RAM. During the execution of a software module, the processor can load some instructions into a cache to improve access speed. Then, one or more cache lines can be loaded into a general-purpose register file for execution by the processor. When referring to the functionality of a software module, it should be understood that such functionality is implemented by the processor when executing instructions from that software module.

[0138] Furthermore, any connection can be appropriately referred to as computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, optical fiber, twisted pair, digital subscriber line (DSL), or wireless technology (e.g., infrared (IR), radio, and microwave), then the definition of medium includes coaxial cable, optical fiber, twisted pair, DSL, or wireless technology (e.g., infrared, radio, and microwave). As used herein, disks and optical discs include compact optical discs (CDs), laser discs, optical discs, digital versatile optical discs (DVDs), floppy disks, 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 foregoing should also be included within the scope of computer-readable media.

[0139] Therefore, certain aspects may include computer program products for performing the operations given herein. For example, such computer program products may include computer-readable media on which instructions are stored (and / or encoded) that can be executed by one or more processors to perform the operations described herein. Figure 8 and Figure 9 The instructions for performing these operations are shown in the diagram.

[0140] Various modifications to the implementations described herein will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other implementations without departing from the spirit or scope of this disclosure. Therefore, the claims are not intended to be limited to the implementations shown herein, but rather to be consistent with the broadest scope of the disclosure, principles, and novel features disclosed herein.

[0141] Furthermore, the various features described in this specification in individual implementations may also be implemented in combinations of individual implementations. Conversely, the various functions described in individual implementations may also be implemented individually in multiple implementations or in any suitable sub-combinations. Thus, although a function may be described above as operating in a particular combination, or even initially claimed to be so, one or more features from the claimed combination may be removed from the combination in certain circumstances, and the claimed combination may involve sub-combinations or variations thereof.

[0142] Similarly, although operations are described in a specific order in the accompanying drawings, this should not be construed as requiring these operations to be performed in the specific order shown or sequentially, or requiring all shown operations to achieve the desired result. Furthermore, the drawings may schematically depict one or more example processes in the form of flowcharts or flow diagrams. However, other operations not depicted may be incorporated into the schematically shown example processes. For example, one or more additional operations may be performed before, after, simultaneously with, or between any of the illustrated operations. In some cases, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the above implementation should not be construed as requiring such separation in all implementations, and it should be understood that the described program components and systems can generally be integrated together in a single software product or packaged into multiple software products.

Claims

1. A method for a user equipment (UE) to conduct wireless communication, comprising: Receive Radio Resource Control (RRC) signaling from a network entity, the Radio Resource Control (RRC) signaling indicating a set of cells that support physical (PHY) layer or media access control (MAC) layer mobility signaling; Receive at least one downlink control information (DCI) from a network entity to indicate mobility information for the cell set; as well as The DCI is used to update one or more features of the cell set.

2. The method according to claim 1, wherein, The cell set is supported by one or more distributed units (DUs) under a common central unit (CU).

3. The method according to claim 2, wherein: The one or more DUs include a common DU that supports each cell in the cell set.

4. The method according to claim 1, wherein, The DCI indicates at least one of the following: The identifier (ID) of the cell in the cell set to be activated to serve the UE, wherein the cell is not currently in a subset of the cell set that is activated to serve the UE; or The ID of one of the cells in the subset of cells that is to be removed from the subset and deactivated from the serving UE.

5. The method according to claim 4, wherein, The DCI includes a field pointing to the ID of the cell to be activated or deactivated in a table or list configured by the RRC signaling.

6. The method according to claim 1, wherein, The DCI indicates an update of the system information (SI) of one or more cells in the set.

7. The method according to claim 6, wherein, The RRC signaling configures one or more SI value sets; and The DCI indicates the update of the SI by deactivating or activating at least one of the SI value sets in the SI value set.

8. The method according to claim 6, wherein, One or more SI information elements (IEs) eligible for updating via the DCI appear in a predefined order and are addressed based on at least one of the numbers or bitmaps in the DCI.

9. The method according to claim 1, wherein, The RRC signaling indicates one or more sets of options for cells in the set; and The DCI activates one or more sets of options for the cell during activation.

10. The method according to claim 9, wherein, At least some of the options involve: timing advance group (TAG) timing advance (TA) information, measurement configuration, or updates or changes to the primary cell (PCell).

11. The method according to claim 1, wherein, The format of the DCI depends at least in part on one or more types of information being conveyed.

12. The method according to claim 1, wherein, The at least one DCI includes at least a first DCI and a second DCI; and The first DCI indicates one or more types of information provided in the second DCI.

13. The method according to claim 1, further comprising: Send an acknowledgment for the at least one DCI.

14. A method for wireless communication by network entities, comprising: Send Radio Resource Control (RRC) signaling to User Equipment (UE), the Radio Resource Control (RRC) signaling indicating a set of cells that support physical (PHY) layer or media access control (MAC) layer mobility signaling; Send at least one downlink control information (DCI) to the UE indicating mobility information for the cell set; as well as The UE communicates with a subset of the activated cells that have one or more characteristics of the cell set updated based on the DCI.

15. The method according to claim 14, wherein, The cell set is supported by one or more distributed units (DUs) under a common central unit (CU).

16. The method of claim 15, wherein: The one or more DUs include a common DU that supports each cell in the cell set.

17. The method of claim 14, wherein, The DCI indicates at least one of the following: The identifier (ID) of the cell in the cell set to be activated to serve the UE, wherein the cell is not currently in a subset of the cell set that is activated to serve the UE; or The ID of one of the cells in the subset of cells that is to be removed from the subset and deactivated from the serving UE.

18. The method according to claim 17, wherein, The DCI includes a field pointing to the ID of the cell to be activated or deactivated in a table or list configured by the RRC signaling.

19. The method of claim 14, wherein, The DCI indicates an update of the system information (SI) of one or more cells in the set.

20. An apparatus for wireless communication for a user equipment (UE), comprising: A receiver configured to: receive radio resource control (RRC) signaling from a network entity, the RRC signaling indicating a set of cells supporting physical (PHY) layer or medium access control (MAC) layer mobility signaling, and receive at least one downlink control information (DCI) from the network entity indicating mobility information for the set of cells. as well as At least one processor is configured to update one or more features of the cell set based on the DCI.

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