119 results about "Handover procedure" patented technology

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.

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.

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.

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.

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.

The present application relates to devices and components, including apparatuses, systems, and methods for a non-terrestrial network node handover procedure in a wireless network.

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.

This disclosure provides systems, methods, and apparatus for determining a target base station timing advance value between a user equipment (UE) and a target base station in conjunction with a handover procedure without a random access channel (RACH). In one aspect, the UE may determine the target base station timing advance based at least in part on a timing difference between the target base station and the source base station and at least in part on timing offsets associated with the UE's uplink and downlink. In some aspects, the target base station may use the UE's uplink reference signal to determine the timing advance. In some aspects, the UE may report the timing difference between the target base station and the source base station, and the source cell may determine the timing advance based at least in part on the timing difference.

Various aspects of the present disclosure provide methods and apparatuses for supporting communications in non-terrestrial networks to improve existing handover procedures, such as beam handover procedures. To enable the improvements, a terrestrial device can be integrated into non-terrestrial network handover procedures, such as as a relay node between a terminal device and a non-terrestrial serving cell. A cluster list and a preamble can be stored in the terrestrial device, such that a retransmission request can be issued to the terrestrial device instead of the non-terrestrial serving cell when a packet loss occurs. The terrestrial device can determine the cluster list and assign different respective preambles to respective terminal devices, such that a semi-contention free initial access procedure can be employed. The cluster list and the preambles can be shared between a source non-terrestrial serving cell and a target non-terrestrial serving cell or between neighboring terrestrial BSs, such that signaling can be reduced and contention within neighboring cells can be minimized.

A communication method, a system, and an apparatus are provided. In technical solutions provided in this application, a first access network device sends a handover request message about a terminal to a second access network device based on first handover time information, where the first handover time information includes corresponding time for serving the terminal by at least one access network device; and after receiving the handover request message, the second access network device communicates with a user plane function network element based on the handover request message and core network tunnel information that is of the terminal and that has been stored in the second access network device. In this way, signaling exchange related to the core network tunnel information between the second access network device and a core network device is reduced, and handover efficiency of performing a handover procedure by the terminal is improved.

Example embodiments provide a handover procedure enhanced with group-based beam reporting for multiple transmission and reception point operation Apparatuses, methods, and computer programs are disclosed.

A system and method for improving mobility performance. The system and method include receiving, by a target master wireless communication node (MN) from a source master wireless communication node (MN), a handover request to begin a handover procedure; and transmitting, by the target MN to a target secondary wireless communication node (SN), a first message to inform the target SN about a type of SN addition or change procedure to perform the handover request, wherein the first message causes the target SN to send a second message to the target MN to inform the target MN of one or more configured primary secondary (PSCells).

A method for a user equipment (UE) is provided. The method includes the UE maintaining a first Radio Resource Control (RRC) connection with a first base station (BS) of a first network while receiving transmissions from a BS of a second network during at least one time period specified in a switch gap configuration. The UE receives an RRC reconfiguration message from the first BS that includes a first command and a second command. The first command instructs the CE to begin a handover procedure from the first BS to a second BS of the first network. The UE may initiate executing of the handover procedure according to the first command. The UE may or may not continue to receive transmissions from the BS of the second network during the at least one time period based on the second command.

The present disclosure provides a user equipment, UE, configured to use a machine learning, ML, model at the UE for reasoning related to a communication procedure of a wireless network; and to allow a transition between using the ML model at the UE and using the ML model at the network entity of the wireless network for reasoning during the communication procedure. The communication process may be a handover process.

A method performed by a UE for handling handover (HO) procedures is provided. The method performs a first HO procedure. The method receives information associated with a second HO procedure during the first HO procedure. The method in response to receiving the information, determines whether to (i) continue performing the first HO procedure or (ii) stop the first HO procedure and perform the second HO procedure.

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive first reference signaling from a first cell. The UE may perform a handover procedure to the first cell in accordance with a set of one or more values of a set of one or more parameters associated with the handover procedure, wherein the set of one or more values is selected based at least in part on a machine learning model and the received first reference signaling.

A method of obtaining sidelink configuration in a CU of a distributed base station includes receiving sidelink information related to sidelink communications at a UE operating in a first cell (1602); initiating handover procedure or a cell change procedure so that the UE utilizes a radio resource on a second cell associated with a target node, the target node corresponding to a DU of the distributed base station or another base station (1604); transmitting, to the target node, a request to set up a context for the UE, the request including the sidelink information (1606); and receiving, from the target node, a response to the request, the response including a sidelink configuration for the UE (1608).

The present application relates to methods, systems, and devices related to digital wireless communication, and more specifically, to techniques related to supporting service continuity during a network handover. In one exemplary aspect, a method for wireless communication is disclosed. The method includes receiving a first message from a second network node, the first message including slice remapping assistance information. The method also includes handing over, based on a handover procedure, a network service for a terminal from the first network node to a target network node using the slice remapping assistance information or initiate a terminal context retrieve procedure using the slice remapping assistance information.

A communication method and apparatus, relating to the technical field of communications, and used for reducing or preventing long service interruption times in a station roaming process. The method comprises: a first SFU obtaining an association request frame (or a reassociation request frame) from a station, and a key used for communication with the station, the association request frame (or the reassociation request frame) being used by the station to associate with the first SFU; and the first SFU sending the association request frame (or the reassociation request frame) and the key to a primary optical network unit MFU. The MFU sends the association request frame (or the reassociation request frame) and the key to a second SFU. In an online association phase, the SFU synchronizes the obtained association request frame and key to the MFU, and then the MFU synchronizes the obtained association request frame and key to another SFU, so that the SFU does not need to re-obtain the association request frame and key in the roaming phase, thereby reducing the complexity of a roaming handover procedure, and reducing or preventing long service interruption times in a station roaming process.

A method, performed by a first network node (111). The method is for handling information indicating a position of a wireless device (130). The first network node (111) operates in a wireless communications network (100). The first network node (111) obtains (203) first information indicating a position of a wireless device (130) operating in a wireless communications network (100). The first network node (111) serves the wireless device (130). The first network node (111) sends (204) a first indication to a second network node (112) operating in the wireless communications network (100). The second network node (112) is a target network node, in a handover procedure, to serve the wireless device (130). The first indication indicates the obtained first information.

Aspects relate to handover of a user equipment (UE) from a first cell (e.g., an SpCell) to a second cell (e.g., an SpCell). In some examples, Layer 1 signaling and / or Layer 2 signaling may be used to handover the UE from the first cell to the second cell. In some examples, the handover may omit a random access channel (RACH) procedure.