206 results about "Handover procedure" patented technology

The embodiment of the invention relates to terminal equipment, a method, a device and a computer readable storage medium for QoE (Quality of Experience) continuity in an inter-RAT (Radio Access Technology) switching process within 5GC. In some embodiments, a first layer of a terminal device may receive a mobility command from a source terminal device. The first layer may provide an AT command to an upper second layer of the terminal device to notify the second layer to release at least one configuration QoE measurement and a related RRC ID. Thus, the second layer may release at least one configuration QoE measurement and a related RRC ID. Therefore, QoE continuity can be maintained in RAT handover from NR to LTE, and thus communication between the terminal device and the target network device can be ensured.

In wireless communication, a device may change, add, or handover between providers (e.g. nodes) of network access. This may include a conditional cell addition / change procedure and / or a conditional handover procedure. Execution conditions with candidate cell information and configurations may be used for selecting a target cell for the handover to reduce interruption time and improve reliability.

A wireless communication method and / or apparatus is disclosed. The method comprises receiving, by a wireless communication terminal from a network node, configuration information for a handover procedure without a Random Access Channel, RACH procedure; initiating, by the wireless communication terminal, the handover procedure without a RACH procedure according to the configuration information; and transmitting, by the wireless communication terminal to a wireless communication node, uplink, UL, data for the handover procedure without a RACH procedure according to the configuration information.

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products for handover procedures which use network predicted measurements. For example, a wireless transmit / receive unit (WTRU) may receive a handover command. The WTRU may receive a first set of measurements from a network. For example, the first set may be predicted measurements. The network may use artificial intelligence and / or machine learning models to generate the first set. The WTRU may obtain (e.g., measure and / or predict) a second set of measurements. The first and / or second set of measurements may be associated with a (e.g., same) first time interval and / or confidence level. Based on a comparison between the first set and second set, the WTRU may determine (i) to execute a handover, in a second time interval, and / or (ii) send feedback information. For example, the WTRU may determine an ideal time to actually execute the handover.

The present disclosure provides a radio link failure reporting method and user equipment. The radio link failure reporting method includes: detecting, by user equipment (UE), occurrence of a radio link failure (RLF); and storing, by the UE, radio link failure information in an RLF report, wherein if the UE has performed a handover procedure before the RLF, the radio link failure information includes: information for indicating the type of the handover procedure; a global cell identity and a tracking area code of a cell where the latest handover command was received; and an elapsed time starting from reception of the latest handover command.

Method comprising:receiving, from a first cell of a satellite, a handover command triggering a handover of a terminal from the first cell of the satellite to a second cell of the satellite and an assumed location of the terminal;determining an actual location of the terminal;checking one or more of the following conditions applies: the actual location of the terminal deviates from the assumed location by more than a first threshold, and the actual location of the terminal is on the side of the first cell of the coverage boundary and remote from the coverage boundary by at least a second threshold;preventing the terminal from performing the handover if at least one of the one or more checked conditions is fulfilled.

There is provided a method and apparatus for performing handover for devices performing local Artificial Intelligence (AI) inference. A User Equipment (UE) determines that a handover should occur not only based on signal strength, but on other factors relating to a serving base station's ability to assist the UE in its ongoing AI inference task, as compared to the target base stations. When a handover occurs, the target base station is selected based on its ability to assist the UE in its ongoing AI inference task, and the handover procedure may include forwarding AI-relevant data to the target base station and the UE pausing the AI inference task at a specified checkpoint, to be resumed once the handover is complete.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a source cell, a candidate cell indication indicating one or more neighboring cells. The UE may receive a cell prioritization configuration that includes one or more rules for prioritizing the one or more neighboring cells in accordance with support for a packet data unit (PDU) set capability. The UE may transmit, to the source cell, a target cell indication indicating a target cell selected from among the one or more neighboring cells in accordance with the cell prioritization configuration. The UE may receive, from the source cell, a handover command for performing a handover procedure from the source cell to the target cell. Numerous other aspects are described.

In a non-terrestrial network (NTN), a user equipment (UE) may be configured to transmit location information associated with the UE to a source NTN entity. The UE may be further configured to perform a handover procedure from the source NTN entity to a target NTN entity after transmitting the location information to the source NTN entity. The UE may be further configured to refrain from transmitting the location information to the target NTN entity before completion of the handover procedure. The source NTN entity may be configured to receive UE location information, and transmit a message associated with handover of the UE to a target NTN entity, the message including information that is based on the UE location information.

The present application relates to a method and an apparatus for performing a handover procedure. One embodiment of the subject application provides a method, which includes: receiving a configuration signaling including first configuration information or second configuration information; determining a first target primary cell (PCell) based on the configuration signaling; and performing a handover procedure to the first target PCell.

Methods, systems, and devices for wireless communications are described. In some examples, a network entity may send a capability message indicating support for multi-modal services associated with user equipments (UEs). The network entity may receive a message indicating a configuration for a multi-modal service of the multi-modal services and communicate in accordance with the multi-modal services. In another example, a network entity may transmit an indication of a cell set to a set of UEs for handover procedures. A UE may initiate a handover to a target cell and the network entity may transmit a handover command to the set of UEs. In another example, a network entity may transmit an indication of cell set to a set of UEs for cell switching. A UE may transmit a report of a target cell and the network entity may transmit a cell switch command and a cell switch notification.

Aspects of the disclosure relate to techniques for slice aware mobility by facilitating slice specific user equipment (UE) measurement procedures and slice specific handover procedures for ongoing network slices of the UE. A network entity may configure a measurement report for the UE including one or more slice specific parameters. The UE may use the slice specific parameters to generate a measurement report including signal quality measurements of a serving cell and / or neighbor cells. The network entity may further identify candidate target cells for a handover based on the ongoing network slices of the UE and slice supporting capability information indicating neighbor cell(s) that support the ongoing network slices.

A wireless terminal of a cellular telecommunication system communicates with a first cell served by a mobile base station relay. The wireless terminal comprises receiver circuitry and processor circuitry. The receiver circuitry is configured to receive, from the first cell, a reconfiguration message comprising second cell information including a cell identity and an operating frequency of a second cell and an indication indicating whether or not the first cell will be replaced by the second cell. The processor circuitry is configured to: (1) perform, based on the reconfiguration message, a handover procedure to handover to the second cell, and (2) perform a cell selection procedure in a case that the handover procedure fails. During the cell selection procedure, the first cell is not considered as a candidate in a case that the indication indicates that the first cell will be replaced by the second cell.

This invention relates to a method comprising: receiving, by a wireless device from a node, one or more parameters indicating measurement gaps; performing a measurement on a reference signal during a first measurement gap of the measurement gaps; determining, using the measurement, a predicted measurement of the reference signal in a second measurement gap of the measurement gaps; during a predicted time, determining whether the predicted measurement indicates a predicted link failure; and in response to determining that the predicted measurement indicates the predicted link failure, perform one or more resulting actions, wherein the one or more resulting actions may include: skipping the second measurement gap of the measurement gaps during the predicted time; transmitting, to the node, one or more messages indicating skipping of the second measurement gap of the measurement gaps or communicating with a base station during the second measurement gap; switching to a pre-configured backup link to maintain connectivity; reducing transmission power to minimize self-interference while maintaining the ability to receive signals; adapting communication parameters logging the predicted link failure event and determined resulting action and reporting the predicted link failure and resulting action, switching to IDLE / INACTIVE state, starting a cell (re)selection procedure, and / or performing a handover procedure.

A method may include receiving, by a wireless device and via a first cell, a layer 1 / layer 2 trigger mobility (LTM) cell switch command indicating an LTM cell switch to a second cell and a random access channel (RACH)-less LTM cell switch to the second cell. The method may also include applying, after a time duration from a transmission occasion of a physical uplink control channel (PUCCH) for the LTM cell switch command, a first TCI state to the second cell. The time duration is based on a radio resource control (RRC) processing time; and synchronization signal block (SSB) measurement window for receiving, from the second cell, a first SSB transmission using the first TCI state. The method may also include transmitting, via the second cell, first uplink transmissions using the first TCI state until the wireless device receives an activation command indicating a second TCI state.

Procedures, methods, architectures, apparatuses, systems, devices, and computer program products directed to control throughput performance. In an embodiment, a method, implemented in a wireless transmit / receive unit (WTRU), comprises receiving, from a network, a measurement configuration information comprising target cells to be measured and a conditional event configuration information for triggering a CHO command; monitoring the current radio conditions of target and serving cells; performing prediction of the radio conditions of target and serving cells; and in response to current radio conditions of a target cell and / or serving cell fulfilling one or more associated radio condition threshold(s) and in response to the predicted radio conditions of a target and / or serving cell fulfilling one or more associated radio condition, executing the CHO command.

Methods, systems, and devices for providing feedback about radio link failure (RLF) events that includes information about directional beams. A user equipment (UE) may experience an RLF event and lose connectivity with a network. After the UE reestablish a radio resource control (RRC) connection with the network, the UE may transmit an RLF report that include information about directional beams, information about a master node and a secondary node in a dual-connectivity procedure, information associated conditional handover procedures, or information about service time interruptions, or a combination thereof. One or more base stations may be configured to transmit at least portions of the information in the RLF report to other base stations as part of a message that may be an example of an RLF indication or a handover report. The message may be transmitted over an X2 interface or an Xn interface.

Various aspects of the present disclosure generally relate to wireless communication. A user equipment (UE) may receive, from a source network node, information associated with a handover from the source network node to a target network node. The UE may transmit, to the target network node after the handover from the source network node to the target network node, information associated with a protocol data unit (PDU) in a set of PDUs scheduled for transmission to the UE based on a timer associated with the PDU and a request for the target network node to discard a first subset PDUs of the set of PDUs based on the information associated with the PDU. The UE may receive, from the target network node, a second subset of PDUs of the set of PDUs based at least in part on the information. Numerous other aspects are described.

Methods, systems, and devices for method for wireless communication are described. A user equipment (UE) may establish a connection with a serving cell of a network entity, where the network entity supports a set of cells including the serving cell. In some examples, the UE may receive an indication of a common search space configuration associated with a target non-serving cell of the network entity and may also receive a control signal including an indication to perform a handover procedure. The UE may then perform the handover procedure to switch the connection from the serving cell of the network entity to the target non-serving cell of the network entity based on receiving the control signal and the common search space configuration associated with the target non-serving cell of the network entity.

In an example, a method performed by a User Equipment (UE) for performing a Layer 1 / Layer 2 triggered Mobility (LTM) cell handover procedure is provided. The method includes receiving one or more LTM candidate cell configurations, and receiving an LTM cell handover command including an indication of one of the one or more LTM candidate cell configurations. The method further includes applying the indicated LTM candidate cell configuration to switch to a cell associated with the indicated LTM candidate cell configuration, and in response to applying the indicated LTM candidate cell configuration, transmitting signaling on the cell associated with the indicated LTM candidate cell configuration, where the signaling indicates that the cell switching procedure is complete.

The present disclosure relates to NR handover, RLM, BFD, and CBD with CCA. Some aspects relate to apparatuses and methods implementing mechanisms for performing handover, radio link monitoring (RLM), beam failure detection (BFD), and candidate beam detection (CBD) within unlicensed spectrum upon occurrence of a listen-before-talk (LBT) failure and / or upon a user equipment (UE) performing a receive (RX) beam sweep. For example, a UE is configured to receive a handover command for connecting to a target cell. The UE is further configured to determine a search time and an interruption time uncertainty during a handover procedure initiated by the handover command and in response to an LBT failure or the UE performing a beam sweep operation. The UE can further determine a handover delay based on the search time and the interruption time uncertainty. The UE can stop the handover procedure in response to a time period for performing the handover procedure exceeding the handover delay.

Exemplary embodiments of the present disclosure relate to technical solutions for seamless band combination handover. In one aspect, a terminal device sends, to a network device, information indicating a service interruption of at least one band combination or at least one band in a plurality of bands. Then, the terminal device receives, from the network device, a message indicating at least one band handover configuration associated with the service interruption and a band handover procedure for a target band combination in the at least one band combination or for a target band in the at least one band. Then, the terminal device performs, for the target band combination or the target band, the band handover procedure based on the at least one band handover configuration and the service interruption.

Embodiments of the present disclosure relate to methods and apparatuses for mobility robustness optimization. According to some embodiments of the disclosure, a method may include: performing one of the following handover procedures associated with a target cell: a handover procedure in response to receiving a handover command, a CHO procedure in response to meeting a CHO execution condition, and a DAPS handover procedure in response to receiving a DAPS handover command; accessing the target cell; storing assistant information related to a successful handover to the target cell; and transmitting the assistant information related to the successful handover to the target cell in response to a trigger condition for transmitting assistant information being met. In addition, the target BS may transmit the assistant information related to the successful handover to the source BS over the Xn interface.

The present disclosure relates to a handover method, a network device and a system in a multi-connectivity network. The method includes: determining a type of a user of a terminal during a handover procedure of the terminal to a multi-connectivity network of the construction operator; determining a user plane split policy corresponding to the terminal according to the type of the user of the terminal; and switching a user plane channel of the terminal to a user plane channel of a first standard network of the construction operator, in a case that the user plane split policy is split-disabled, and switching the user plane channel of the terminal to the user plane channel of the first standard network and a user plane channel of a second standard network of the construction operator, in a case that the user plane split policy is split-enabled.

The present disclosure automatically allows a user to make voice call on a Long-Term Evolution (LTE) network when a User Equipment (UE) (104, 310, 410, 510) is not capable to make voice call on a 5G Standalone (SA) network via redirection or via Handover. The present disclosure allows the user to release the 5G SA network and redirect to measured Evolved Universal Terrestrial Radio Access (E-UTRA) Absolute Radio Frequency Channel Number (EARFCN) of LTE band to proceed an Evolved Packet System Fallback (EPSFB) call successfully, if there is unprecedented failure during the handover procedure. The present disclosure allows the user to redirect to LTE Radio Access Technology (RAT) on default frequency band configured in gNodeB (gNB) ((320, 420, 520) during an emergency voice call or when B1 measurement delayed or not received, or while the UE (104, 310, 410, 510) is active with other procedure or stuck in race conditions.

According to one aspect, there is provided a method for execution by a first communication node of a target network. The method includes maintaining a local cache identifying services known to be available for communication devices in a target network. The method further includes receiving at least one service identifier from the second communication node during a handover procedure of the communication device from the initial network to the target. According to one embodiment of the present disclosure, the method includes, for each service identifier, signaling a service repository of a target network to discover a service corresponding to the service identifier only when the service is not identified in a local cache. In this way, discovery of duplicate services can be mitigated.

Embodiments of the present application relate to methods and apparatuses for a mobility robustness optimization (MRO) mechanism of an inter-radio access technology (RAT) handover procedure. According to an embodiment of the present application, a method can include: receiving a mobility command message from a source new radio (NR) cell, wherein the mobility command message includes an identifier (ID) of a target cell, and the target cell is at least one of an evolved universal terrestrial radio access network (E-UTRAN) cell and an universal terrestrial radio access network (UTRAN) cell; determining whether a timer for initiating failure recovery based on triggering a measurement report (e.g., timer T312) is running; and in response to the timer being running, stopping the timer. Furthermore, radio link failure report (RLF) information is transmitted to a network in response to the failure of Inter-RAT handover from NR to E-UTRAN and UTRAN.

Methods, systems, and devices for wireless communication are described. A user equipment (UE) may receive a first control message indicating a set of mobility parameters associated with a lower layer handover procedure, which may be a layer 1 (L1) / layer 2 (L2) handover procedure. The UE may receive a second control message indicating a first or second reset procedure, which may each indicate a respective set of operating parameters for a higher layer than L1 / L2 in the protocol stack. The UE may perform the lower layover handover procedure, which may include switching from a first serving cell to a second serving cell. The UE may perform the first or second reset procedure based on the switching, where the first reset procedure may include maintaining the operating parameters of the second serving cell, and the second reset procedure may include switching the operating parameters of the second serving cell.

Disclosed is a method for performing a handover. The method for performing a handover, which is performed by a base station, comprises the steps of: receiving a measurement control report from a terminal; determining a handover on the basis of the measurement control report from the terminal; and transmitting a handover request to a target base station, wherein the handover request includes AI / ML-related information about the terminal.