138 results about "Cell Mobility" patented technology

In wireless communication, a device may change, add, or handover between cells of network access for inter-cell mobility. This may include Layer 1 and / or Layer 2 (L1 / L2) signaling for a user equipment (UE) moving between cells in a network. There may be a configuration message that includes configurations for one or more Layer 1 (“L1”) or Layer 2 (“L2”) Triggered Mobility (“LTM”) candidate cells. A measurement report with L1 measurements for the LTM candidate cells is used for a cell switch command to indicate a target LTM candidate cell to trigger execution of a LTM cell switch to the target LTM candidate cell. The LTM cell switch is from a source cell to the target LTM candidate cell.

A method (1300) by a user equipment, UE (402, 502, 602, 800), in a connected state is provided for configuring Layer 1 / Layer 2, L1 / L2, based inter-cell mobility. The method includes transmitting (1302) a Measurement Report comprising one or more measurements associated with one or more cells. The UE receives (1304) a Radio Resource Control, RRC, Reconfiguration message comprising at least one configuration of a L1 / L2 based inter-cell mobility candidate cell. The UE transmits (1306) an RRC Reconfiguration Complete message.

Embodiments include methods for a user equipment (UE) configured to communicate with a radio access network (RAN) node comprising a central unit (CU) and a distributed unit (DU) via a serving cell. Such methods include receiving, from the CU via the DU, an RRCReconfiguration message that includes channel state information (CSI) resource configurations associated with at least one candidate cell for L1 / L2-based inter-cell mobility. The at least one candidate cell is provided by one or more neighbor DUs. Such methods include performing CSI measurements on the at least one candidate cell according to the respective CSI resource configurations and sending, to the DU via the serving cell, one or more CSI reports based on the CSI measurements performed. Other embodiments include complementary methods for a CU, a first DU, and a second DU, as well as UEs, CUs, and DUs configured to perform such methods.

A triggering apparatus for an inter-cell mobility procedure includes: a receiver configured to receive measurement-related information, the measurement-related information including one of the following: a layer 1 measurement result by performing layer 1 measurement on a frequency of an inter-frequency candidate target cell or on an inter-frequency candidate target cell by a terminal equipment, first indication information from a second network device based on a layer 3 measurement result by performing layer 3 measurement on a frequency of an inter-frequency candidate target cell or on an inter-frequency candidate target cell by the terminal equipment, or a layer 1 measurement result associated with a candidate target cell; and triggering processor circuitry configured to, based on the measurement-related information, trigger a layer 1 or layer 2 based inter-cell mobility procedure from a serving cell to a target cell.

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.

Reporting of events in non-terrestrial network, NTN, coverage. An example method, in a wireless device operating in a wireless communication network, comprises detecting (310) one of one or more pre-determined triggering events and, responsive to the detected triggering event, determining (320) whether the triggering event occurred while the wireless device was operating under non-terrestrial network coverage or under terrestrial network coverage, and / or determining whether the triggering event was due to wireless device mobility or non-terrestrial network cell mobility. The method further comprises saving (330), for reporting to the wireless communication network, information corresponding to this determining.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive first control signaling indicating a configuration of a set of serving cells for inter-cell mobility procedures and a layer one (L1) report configuration. The UE may transmit, in accordance with the L1 report configuration, an L1 report including channel information associated with one or more cell groups of the set of serving cells, where the one or more cell groups include both active and inactive serving cells for the inter-cell mobility procedures. In some cases, the UE may receive second control signaling modifying the L1 report configuration. The second control signaling may indicate parameters of the L1 report configuration to be updated, such as cells or cell groups to be reported, quantities to measure and / or include in the L1 report, etc. The UE may update the L1 report configuration based on the second control signaling.

Presented are systems, methods, apparatuses, or computer-readable media for uplink timing alignment for inter-cell mobility. A wireless communication node of a candidate cell for a wireless communication device can send a configuration associated with the candidate cell, to the wireless communication device. The wireless communication node can receive a transmission sent by the wireless communication device according to the configuration.

Embodiments include methods for a user equipment (UE) configured to communicate with a radio access network (RAN) node comprising a central unit (CU) and a distributed unit (DU) that provides a serving cell for the UE. Such methods include receiving from the DU a lower layer signalling message indicating that the UE should perform L1 / L2-based inter-cell mobility to a first candidate cell provided by a candidate DU. The lower layer signaling message includes an indicator or identity of the first candidate cell, and an indication of a first TCI state to be used by the UE for communicating with the first candidate cell. Such methods include performing) an L1 / L2 mobility procedure towards the first candidate cell and communicating in the first candidate cell based on the first TCI state. Other embodiments include complementary methods for serving and candidate DUs, as well as UEs and DUs configured to perform such methods.

A method performed by a user equipment for Uplink access on a L1 / L2 triggered inter-cell mobility, LTM, candidate cell. The method includes receiving, from a network node, an LTM configuration for at least one LTM candidate cell, receiving a trigger from the network node, and receiving a first synchronization signal from the LTM candidate cell. The method further includes, in response to receiving the trigger, transmitting a UL signal to the LTM candidate cell during a UL resource occasion, where the UL resource occasion occurs during a period of time that is between receiving the trigger and receiving the first synchronization signal from the LTM candidate cell. The first synchronization signal is received after the trigger is received. Related network node methods, UEs and network nodes are also disclosed.

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.

A terminal according to one aspect of the present disclosure includes: a receiving section that receives a Medium Access Control Control Element (MAC CE) related to cell switching; and a control section that judges timing advance (TA) to apply to UL transmission, based on information included in the MAC CE. The MAC CE includes at least one of a field related to cell switching and a field related to the TA. According to one aspect of the present disclosure, even when inter-cell mobility is performed, communication can be appropriately controlled.

Systems, methods, apparatuses, and computer program products for the acquisition and provision of channel state information for a target cell early in the process of layer one / layer two inter-cell mobility are provided. For example, a method can include a user equipment receiving a first configuration of layer one measurement and reporting together with a second configuration for channel state information measurement and reporting for a candidate cell. The method can also include reporting layer one measurement according to the first configuration. The method can further include performing channel state information measurements according to the second configuration. The method can additionally include reporting the channel state information measurements to a network element to be forwarded to the candidate cell.

Disclosed are methods, systems, and computer-readable medium to perform operations including: methods and systems for latency reduction in user equipment (UE) for inter-cell mobility. In one example, a method is disclosed for receiving, at a user equipment (UE), configuration data specifying that a random access response (RAR) window that is started at the first symbol of an earliest type-1 physical downlink control channel (PDCCH) monitoring occasion (MO), wherein a time gap between a physical random access channel (PRACH) transmission and the earlier type-1 PDCCH MO is at least ‘kB’ symbols or slots or million seconds. The method includes transmitting, based on the configuration data, the PRACH transmission, and monitoring, within the RAR window specified by the configuration, each type-1 PDCCH MOs for RAR reception in response to the PRACH transmission.

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.

The invention provides a bifidobacterium animalis subspecies HX-BA21, and the preservation number of the bifidobacterium animalis subspecies HX-BA21 is CGMCC (China General Microbiological Culture Collection Center) NO.32958. The invention discloses bifidobacterium animalis subspecies HX-BA21 containing exosome metabiotics and an exosome-containing fermentation compound obtained by fermenting gastrodia elata through the HX-BA21. The fermentation compound comprises a probiotic protective layer (a core layer), an exosome delivery layer (a shell layer) and a prebiotics sustained release layer (a cocoon layer) from inside to outside. The probiotic protection layer comprises a sodium alginate-milk fat globule membrane compound and animal bifidobacterium subsp.animalis; the exosome delivery layer comprises a gelatin-chitosan compound and a gastrodia elata and probiotic mixed exosome; the prebiotic sustained-release layer comprises an octenyl succinic anhydride starch / polyvinyl alcohol compound and inulin. The compound can start cell repair by improving the cell migration rate, up-regulate DNA helicase and telomere related gene expression, delay premature senescence and delay cell senescence caused by D-galactose by adjusting the oxidative stress level.

Aspects presented herein may improve the latency and efficiency of L1 / L2 inter-cell mobility by providing an improved TA management for a UE. In one aspect, a UE derives a TA for a set of deactivated cells based on an Rx time difference between an active cell and the set of deactivated cells. The UE maintains the TA for the set of deactivated cells prior to an activation of the set of deactivated cells. The UE applies the TA to the set of deactivated cells or to an initial Tx to the set of deactivated cells in response to the activation of the set of deactivated cells. The set of deactivated cells may correspond to one deactivated cell or a deactivated TAG that includes multiple deactivated cells.

Embodiments include methods for a user equipment (UE) configured to communicate with a radio access network (RAN) node comprising a central unit (CU) and a distributed unit (DU). Such methods include receiving, from the CU via the DU, a reconfiguration message that includes configurations associated with each of at least one candidate cell for L1 / L2-based inter-cell mobility from a serving cell provided by the DU. The candidate cells are provided by one or more neighbor DUs. Such methods include storing the received configurations and receiving, from the DU, a lower layer signalling message including a command for the UE to change its serving cell to a first candidate cell, for which a configuration was received in the reconfiguration message. Such methods include performing an L1 / L2 mobility procedure towards the first candidate cell and communicating in the first candidate cell according to the stored configuration associated with the first candidate cell.

Methods, systems, and devices for wireless communications are described to support inclusion of layer 1 (L1) or layer 2 (L2) cell mobility information within a layer 3 (L3) handover command. A base station may transmit, to the UE, signaling indicating for the UE to perform a measurement on a first set of cells. The UE may perform the measurement on the first set of cells and may transmit, to the base station, an indication associated with the measurement on the first set of cells. In response to the indication, the base station may transmit, to the UE, an L3 handover command, where the L3 handover command may include L1 or L2 cell mobility information, such as an indication of a second set of cells that the UE is to use for L1 or L2 cell mobility after completing the L3 handover command.

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.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a measurement configuration indicating a scheduling restriction corresponding to a Layer 1 (L1) measurement of a reference signal associated with an L1 or Layer 2 (L1 / L2) inter-cell mobility operation associated with a first cell and a second cell, wherein the scheduling restriction prohibits communication of a signal, other than the reference signal, during at least one adjacent symbol, wherein the at least one adjacent symbol comprises at least one symbol that is adjacent to at least one measurement symbol associated with reception of the reference signal, and wherein the at least one adjacent symbol is not associated with reception of the reference signal. The UE may receive the reference signal based at least in part on the measurement configuration. Numerous other aspects are described.

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.

Embodiments described herein relate to methods and apparatus for enabling performance of actions related to a first secondary cell group upon performance of Layer 1 (L1) / Layer 2L2 triggered mobility cell handover. A method performed by a user equipment communicating with a source node in a primary cell group (MCG) includes performing a Layer 1 / Layer 2 Inter Cell Mobility (LTM) cell handover procedure from the source node to a target node; and performing one or more actions related to the first secondary cell group after or during performing the LTM cell handover procedure.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive from a network entity first control signaling identifying, of multiple cell groups configured at the UE, an inter-cell mobility configuration for a set of one or more cell groups for use at the UE. In some examples, each cell group of the multiple cell groups may include a primary cell (PCell) and zero or more secondary cells (SCells). The UE may transmit a measurement report for each cell group of the set of one or more cell groups for inter-cell mobility. The UE may receive, at least in part in response to transmitting the measurement report, second control signaling activating or deactivating a primary cell group for inter-cell mobility from one or more cell groups of the set of one or more cell groups.

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 method for performing an inter-cell mobility (LTM) cell change based on L1 / L2 by a UE includes receiving an LTM configuration, the LTM configuration including an LTM candidate cell configuration for LTM; receiving an indication of an LTM candidate cell; and performing DL pre-synchronization with the LTM candidate cell. The UE receives an LTM cell change command from a serving cell, wherein the command indicates that the UE needs to access and change to an LTM candidate cell; and transmitting an uplink (UL) signal to the LTM candidate cell in response to the LTM cell change command. Related network node methods are also disclosed.

A method of managing condition switching in a mobile network is provided. The method includes receiving, at a user equipment (UE) served by a first node, conditional switching configuration data for one or more nodes, the one or more nodes including a second node. The method further includes starting a timer in response to an event during a handover from the first node to the second node. The method further includes preventing initiation of a handover to the first node from the second node to the first node when the timer is running.

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.