52 results about "Cell Mobility" patented technology

Embodiments include methods for a user equipment (UE) configured to communicate with a radio access network (RAN) node via a serving cell. Such methods include obtaining a configuration that defines one or more conditions that trigger lower layer measurements on one or more candidate cells for L1 / L2 inter-cell mobility. Such methods include performing one or more of the following measurements: lower layer measurements of the serving cell, first L3 measurements of the serving cell, and second L3 measurements of at least one of the candidate cells. Such methods include, based on detecting that the performed measurements fulfil at least one of the conditions, initiating lower layer measurements of at least one candidate cell associated with the fulfilled at least one condition, and sending to the RAN node a lower layer measurement report that includes results of the lower layer measurements performed on the at least one candidate cell.

Methods, apparatuses, systems, devices, and computer program products for L1 / L2 inter-cell mobility and / or measurements are provided. One method may include performing measurements of a signal quality of a serving cell and, based on a first condition based on the signal quality of the serving cell being met, performing measurements of the signal quality of Layer 1 / Layer 2 triggered mobility (LTM) candidate cells, performing an evaluation of the measurements of the LTM candidate cells using a first measurement evaluation method, and / or reporting using a first reporting method. Based on a second condition based on a signal quality of the LTM candidate cells being met, performing measurements of signal quality of cells outside of the set of LTM candidate cells, evaluation of the measurements of the cells outside of the set of LTM candidate cells using a second measurement evaluation method, and / or reporting using a second reporting method.

According to some embodiments, a method is performed by a wireless device for performing channel state information (CSI) measurements for layer one (L1) / layer two (L2) inter-cell mobility. The method comprises receiving a message from a network node. The message comprises at least one configuration of a target L1 / L2 inter-cell mobility candidate cell. The method further comprises: performing CSI measurements on at least one of a synchronization signal (SS) and a reference signal (RS) of the target L1 / L2 inter-cell mobility candidate cell based on the at least one configuration of the target L1 / L2 inter-cell mobility candidate cell and transmitting a CSI report including information based on the CSI measurements to the network node.

Methods are described for a wireless device, such as a UE, to execute a Layer-1 (LI) or Layer-2 (L2) based inter-cell mobility serving cell change, based on the fulfillment of an execution condition (e.g., based on measurements), using a conditional reconfiguration. The UE receives, from a serving network node, a message containing at least one conditional reconfiguration for L1 / L2 based inter-cell mobility serving cell change. The at least one conditional reconfiguration includes at least one of an execution condition, an indication of a candidate target cell for L1 / L2 mobility, and a lower layer command. When an execution condition associated to the candidate target cell for L1 / L2 inter-cell mobility is fulfilled, the UE executes the conditional reconfiguration that results in a L1 / L2 based inter-cell mobility serving cell change to the candidate target cell. The UE then starts to operate according to a configuration of the candidate target cell in the L1 / L2 based inter-cell mobility serving cell change.

Embodiments includes methods for a user equipment (UE) configured for conditional layer- 1 / layer-2 triggered inter-cell mobility (LTM) in a radio access network (RAN). Such methods include receiving the following information from a first RAN node via a source cell: a 5 configuration for an LTM candidate cell provided by a second RAN node, an execution condition for LTM cell switch by a UE to the LTM candidate cell, and a configuration of resources for an initial transmission in the LTM candidate cell after the execution condition is fulfilled. Such methods include, in response to determining that the execution condition is fulfilled, performing an LTM cell switch from the source cell to the LTM candidate cell, including selectively 0 performing a random access (RA) to the LTM candidate cell based on whether the configured resources are activated. Other embodiments include complementary methods for the first and second RAN nodes. 5 Figure 7 is selected for publication.

In general, the current subject matter relates to secure layer 1 / layer 2 (L1 / L2) centric inter-cell mobility execution. In some implementations, secure L1 / L2 centric inter-cell mobility execution can include mapping a physical cell identifier (PCI) of at least one L1 / L2 triggered mobility (LTM) target cell of at least one target distributed unit (DU) of a base station that is a candidate for handover (HO) for a user equipment (UE) to an index, and securely transmitting the mapping from a centralized unit control plane (CU-CP) of the base station to the UE and to a serving DU of the base station that is currently serving the UE for at least one service.

Embodiments include methods for a user equipment (UE) configured for layer-1 / layer-2 triggered inter-cell mobility (LTM) in a radio access network (RAN). Such methods include receiving, from a RAN node, a single command for early synchronization with an LTM candidate cell. The single command includes an identifier of the LTM candidate cell and an identifier associated with a transmission configuration indicator (TCI) state of the LTM candidate cell. Such methods include, based on the single command, performing early uplink (UL) synchronization and early downlink (DL) synchronization with the LTM candidate cell. Other embodiments include complementary methods for a RAN node, as well as UEs and RAN nodes configured to perform such methods.

A method for wireless communication at a user equipment (UE) is provided. In the method, the UE receives, via radio resource control (RRC), a configuration of multiple candidate cells for layer 1 (L1) or layer 2 (L2) inter-cell mobility from a network entity, and receive information about an L2 reset when switching between the multiple candidate cells from the network entity. Then, the UE performs a serving cell switch within the candidate cells for the UE in response to L1 or L2 signaling, and resets or reuses an L2 cell configuration based on the information in response to the serving cell switch.

A terminal according to one embodiment of the present disclosure is provided with: a receiving unit that receives a downlink control channel (PDCCH) command for a certain candidate cell; and a control unit that determines, on the basis of the PDCCH command, execution of a power ramp for random access channel (PRACH) transmission, the control unit sets a preamble power ramp counter to 1 in addition to a case where a serving cell is instructed as a candidate cell for inter-L1 / L2 cell mobility (LTM) by the PDCCH command.

A wireless terminal of a cellular telecommunication system communicates with an access node via a cell and comprises receiver circuitry and processor circuitry. The receiver circuitry is configured to receive, from the cell, serving cell mobility information. The processor circuitry configured to determine, based on the serving cell mobility information, mobility state of the cell.

The present application provides a wireless communication method and a user equipment, which can reduce the delay and interruption of inter-cell mobility. In one embodiment, the wireless communication method provided by the present application can include: a user equipment in a serving cell of a mobile communication network receiving a configuration, the configuration including an active set of cells; the user equipment performing pre-synchronization and measurement with each active cell in the active set of cells based on the configuration, wherein the user equipment maintains downlink (DL) synchronization with each active cell; the user equipment receiving a cell handover command from the mobile communication network to hand over from the serving cell to a target cell belonging to the active set of cells; and after receiving the handover command, the user equipment applying RRC configuration of the target cell.

An apparatus for wireless communication at a UE is provided. The apparatus is configured to receive a layer 1 (L1) or layer 2 (L2) mobility cell configuration for a set of cells for L1 or L2 inter-cell mobility. The set of cells include multiple cells, and each cell in the set of cells is able to be activated or deactivated for data and / or control transfer using L1 or L2 signaling. The apparatus is further configured to receive L1 or L2 signaling indicating multiple activated cells, and activate one or more cells in the multiple activated cells in the priority order for the data and / or control transfer using L1 or L2 signaling. The apparatus provides configuration, cell activation or deactivation in an optimized order, and associated signaling to enable L1 / L2 mobility for more efficient and robust mobility management.

A terminal according to one aspect of the present disclosure includes a receiving section that receives a synchronization signal block of a non-serving cell, and a control section that determines a transmission configuration indication (TCI) state of a demodulation reference signal for a physical downlink shared channel or a physical downlink control channel of a serving cell, based on the synchronization signal block of the non-serving cell. According to one aspect of the present disclosure, communication overhead can be suppressed in inter-cell mobility.

Aspects of the disclosure provide a method for wireless communications by a user equipment (UE). The method generally includes receiving 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, participating 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, receiving a response message from the target cell indicating success of the handover procedure, and terminating activity with one or more source PCIs after receiving the response message.

According to some embodiments, a method is performed by a wireless device for timing advance (TA) management between the wireless device and at least one target candidate cell for layer one (L1) / layer two (L2) inter-cell mobility. The wireless device is operating in a serving cell different from the target candidate cell. The method comprises: receiving an uplink configuration for a target candidate cell; transmitting an uplink message to the target candidate cell based on the uplink configuration; and receiving a TA value associated with the target candidate cell. The TA value is received in a message from the serving cell.

Systems and methods for beam indication for layer 1 / layer 2 (L1 / L2) centric inter-cell mobility are described herein. A base station may provide a user equipment (UE) with beam indications, in one or more transmission configuration indication (TCI) states, and may provide different beam indications for different search spaces (SSs), including UE-specific search space (USS) and common search space (CSS) within a same control channel resource set (CORESET). A UE may implicitly select a radio link monitoring (RLM) and beam failure detection (BFD) reference signal (RS) in accord with one or more methods, and in some cases may implicitly select an RLM / BFD RS based on one or more received TCI states or beam indications.

Embodiments include a method for a user equipment (UE) configured to perform a Layer 3 (L3) mobility procedure in a Radio Access Network (RAN). Such a method includes receiving, via a source cell in the RAN, a configuration of an inter-cell mobility (LTM) procedure for layer 1 or layer 2 triggering in the RAN. Such a method includes managing LTM configurations during preparation or execution of an L3 mobility procedure to a target cell in the RAN, including one or more of the following management operations: maintaining the LTM configuration, releasing the LTM configuration, modifying the LTM configuration, and adding a second LTM configuration. Other embodiments include supplemental methods for a RAN node configured to serve a source cell and a target cell, as well as UEs and RAN nodes configured to perform such methods.

In an example, a method performed by a user equipment (UE) for beam failure detection (BFD) monitoring is provided. The method comprises receiving, from a network node, a configuration identifying one or more Layer 1 / Layer 2 (L1 / L2) inter-cell mobility candidate target cells; and performing BFD monitoring on a current serving cell of the UE. The method also comprises determining BFD on the current serving cell, and performing BFR on a beam on the current serving cell or a beam on one of the one or more candidate target cells, or executing L1 / L2 inter-cell mobility to a beam on one of the one or more candidate target cells.

There is provided a user equipment apparatus that includes at least one processor and memory storing instructions. The instructions, when executed by the at least one processor, cause the user equipment apparatus at least to: establish a connection with a serving cell controlled by a serving network node; perform configuration for L1 / L2 triggered mobility (LTM) to a target cell, the target cell controlled by one of: the serving network node or a target network node; prior to receiving a command to switch to the target cell: transmit, towards the target cell, a random access preamble for acquiring timing advance for the target cell; and receive, from the serving network node, an instruction to acquire timing advance for the target cell.

The present disclosure describes methods, systems, and devices for configuring support for inter-cell mobility based on Layer 1 or Layer 2 signaling (L1 / L2). One method includes a first network node supporting a mobility trigger for a user equipment (UE) from the first network node to a second network node by the first network node sending a first message for the UE to a third network node, the first message including mobility information indicating a list of candidate cells for the UE to be handed over. Another method includes a third network node supporting a mobility trigger for a UE from a first network node to a second network node by the third network node receiving a first message for the UE from the first network node, the first message including mobility information indicating a list of candidate cells for the UE to be handed over.

The invention discloses a sensing chip and a detection method thereof. The invention relates to a sensing chip, which comprises a sensing substrate provided with a plurality of optical waveguide detection units; each optical waveguide detection unit corresponds to one cell culture bin, and a polydimethylsiloxane sheet covering the optical waveguide detection unit is arranged in the middle area in each cell culture bin; the optical waveguide detection unit comprises an input waveguide, an annular waveguide and an output waveguide, and the polydimethylsiloxane sheet is arranged above the optical waveguide detection unit in a covering manner. The invention discloses a method adopting an optical waveguide as a core detection unit, which is high in flux, high in speed, small in required cell quantity and greatly reduced in manual intervention part operation, and provides a rapid and reliable method for cell migration detection.

A terminal according to one embodiment of the present disclosure is provided with: a reception unit that receives a downlink control channel command including information relating to a candidate cell or an additional cell; and a control unit that controls, on the basis of the information, physical random access channel transmission (PDCCH command (RACH)) triggered by a downlink control channel command, the control unit determines, on the basis of the information, either a cell facing mobility (LTM) between L1 / L2 cells or a cell using two timing advances (2TA facing).

Methods, systems, and devices for reference cell configuration are described. A user equipment (UE) may receive a signal indicating a delta cell configuration for each candidate cell in a set of one or more candidate cells, the set of one or more candidate cells associated with a reference cell configuration. The UE may monitor for transmissions from candidate cells in the set of one or more candidate cells to identify a target cell, the target cell comprising a candidate cell from the set of one or more candidate cells. The UE may perform a cell mobility procedure with the target cell using the delta cell configuration of the candidate cell and the reference cell configuration of the set of one or more candidate cells.

This disclosure relates to techniques for performing lower level measurement configuration and activation in a wireless communication system. A network may provide one or more measurement configuration for one or more non-active inter-frequency cell. The network and / or UE may activate the measurement configuration (s). The UE may perform measurement and reporting according to the activated configuration (s).

The present invention provides terminals, methods, and base stations that enable proper communication even when performing intra-cell or inter-cell mobility. [Solution] In a mobile communication system, a user terminal has a receiving unit that receives cell switching instruction information in intra-cell or inter-cell mobility that supports multiple transmit / receive points (TRPs), and a control unit that determines a timing advance (TA) to be applied to UL transmission based on the cell switching instruction information. The control unit determines a reference cell or reference TRP for deriving the TA based on whether or not a TRP of a specific cell is included in the timing advance group (TAG).

An indication signal is used for indicating to a UE a communication resource for a second reference signal that is part of a higher-layer configuration from a first base station. The communication resource for the second reference signal is associated with a second base station. The higher-layer configuration also includes a communication resource for a first reference signal associated with the first base station. A UE that receives an indication signal communicates with the second base station. A data transmission or a control signal transmission could be communicated with the second base station using a respective data channel or control channel. The data channel or control channel is associated with the communication resource for the second reference signal.

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.

The application discloses a cell migration behavior prediction method based on physical information width learning, which utilizes cell scratch experiment data to construct a base function matrix, combines a Fisher-KPP reaction diffusion equation to construct a nonlinear least square problem containing physical mechanism constraints, and adopts an enhanced nonlinear least square disturbance algorithm to iteratively solve output weights, so as to realize prediction of cell density space-time evolution. The application converts traditional deep network iterative training into a nonlinear least square problem, greatly reduces a search space through physical information initialization and linearization approximation, and realizes order-of-magnitude improvement of training speed. The application constructs a width learning architecture containing feature nodes and enhanced nodes, effectively avoids the gradient vanishing problem in deep learning, combines analytical derivative calculation, eliminates cumulative error of automatic differentiation on high-order derivatives, and can more accurately capture space-time evolution characteristics in cell migration.

Embodiments include a method for a user equipment (UE) configured for Layer 1 / Layer 2 triggered inter-cell mobility (LTM) in a radio access network (RAN). The method includes: performing an LTM cell handover from a first cell served by a first RAN node to a second cell served by a second RAN node; and identifying a detected beam failure (BFD) in at least a first beam of the second cell based on beams monitored in the second cell after the LTM cell handover. The method further includes: selecting a second beam in the second cell based on the BFD in at least the first beam, and performing beam failure recovery (BFR) in the second beam. The method includes: selectively recording information associated with at least one of the BFD and BFR; and transmitting the recorded information to either the first RAN node or the second RAN node. Other embodiments include complementary methods for the first and second RAN nodes.

This disclosure provides systems. devices. apparatus. and methods, including computer programs encoded on storage media, for BFR techniques based on ICM. A UE (102) activates (420), based on a beam failure with a first network entity (304). a communication gap duration in which the UE (102) refrains from monitoring for signals from the first network entity (304) in at least one of a same CC. a first set of CCs of a same band. or a second set of CCs of a band combination associated with the first network entity (304). The UE (102) receives (422). during the communication gap duration. a CBD reference signal from the second network entity (404). A measurement (424) of the CBD reference signal is indicative of one or more candidate beams associated with the second network entity (404) for recovering from the beam failure with the first network entity (304).