A method performed by a wireless device includes obtaining User Plane (UP) information comprising at least one Handover (HO) interruption time. The at least one HO interruption time is associated with a first packet of a plurality of duplicate packets received by the wireless device. The wireless device transmits, to a network node, a report associated with a handover of the wireless device, the report comprising the UP information comprising the at least one HO interruption time associated with the first packet of the plurality of duplicate packets received by the wireless device.

A method, communication device, and computer readable medium for data inactivity timer control in order to improve the reliability of data transmission. The reliability of the data transmission is improved by: determining an operation for starting a data inactivity timer according to whether a terminal is in a dual active protocol stack (DAPS) handover process in response to the occurrence of a data inactivity timer starting event.

Disclosed are a device and a method for transmitting and receiving data in non-terrestrial and terrestrial network systems. According to an embodiment of the present invention, a wireless transmission and reception method performed by a user equipment in an environment where network nodes providing different cell coverages is implemented including the steps of: receiving information indicating a threshold value based on a synchronization signal block (SSB) or a reference signal received power (RSRP) from a first network node which provides a first cell coverage, measuring a channel between the first network node and the user equipment, comparing the channel measurement value with the threshold value; and on the basis of a result of comparing the channel measurement value with the threshold value, determining whether to initiate connection to a second network node which provides a second cell coverage which at least overlaps the first cell coverage.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may start, at a default data subscription (DDS) of the UE, a timer associated with a non-Third Generation Partnership Project (non-3GPP) tunnel over a cellular network based at least in part on a DDS switching at the UE. The UE may determine, at the DDS, that the non-3GPP tunnel over the cellular network is available prior to an expiry of the timer. The UE may perform a handover of a non-3GPP tunnel over data connection to the DDS based at least in part on the DDS switching at the UE and the non-3GPP tunnel over the cellular network being available prior to the expiry of the timer. Numerous other aspects are described.

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a source base station, configuration information for a handover, wherein the configuration information indicates, for a target non-terrestrial cell, timing and synchronization parameters including a scheduling timing offset, a round trip time between a reference point and a target base station associated with the target non-terrestrial cell, satellite ephemeris information, an ephemeris validity duration associated with the satellite ephemeris information, common timing advance parameters, and a common timing advance validity duration associated with the common timing advance parameters. The UE may perform the handover with the target base station associated with the target non-terrestrial cell based at least in part on the timing and synchronization parameters for the target non-terrestrial cell. Numerous other aspects are described.

The present application discloses a method and a device used for wireless communications, including receiving a first signaling, the first signaling being used to indicate a transition from a first radio link to a second radio link; the first radio link is a direct path; the first signaling is used for configuring a first timer; in response to expiration of the first timer, determining a radio link handover failure and initiating an RRC re-establishment; and transmitting a first message; by receiving a first signaling, the present application can help with network optimization.

The present invention provides a method of operating a user equipment, UE device in communication with a non-terrestrial communication system comprising a plurality of transmission points, the method comprising in the UE device triggering a transmission of a measurement report dependent on a measurement by the UE device of a received signal parameter of a signal received from a transmission point of the system and a comparison of the measured parameter with a threshold, the threshold varying according to a predetermined function dependent on an expected position of the UE device with respect to the transmission point.

Switching between a defined generation of stand-alone (SA) and non-stand-alone (NSA) wireless deployment is presented herein. A system determines user equipment (UE) communication capabilities of a UE that has been determined to be camped on an SA radio access network (RAN) equipment associated with a defined generation of deployment of network equipment, SA network equipment communication capabilities of the SA RAN equipment, and NSA network equipment communication capabilities of an NSA RAN equipment that is associated with the defined generation of deployment of network equipment and that has a defined NSA aggregated channel bandwidth that is greater than a defined SA aggregated channel bandwidth of the SA RAN equipment; and based on the communication capabilities of the UE, the SA RAN equipment, and the NSA RAN equipment, the system determines whether to initiate a handover of a communication session from the SA RAN equipment to the NSA RAN equipment.

Embodiments of the present application relate to methods and apparatuses for a mobility robustness optimization (MRO) mechanism for a conditional handover (CHO) procedure. According to an embodiment of the present application, a method can include: receiving CHO configuration information for a user equipment (UE), wherein the CHO configuration information is associated with one or more CHO candidate cells and includes a set of execution conditions corresponding to the one or more CHO candidate cells; performing a handover (HO) procedure associated with a target cell, in response to receiving a handover command from a source cell or performing a CHO procedure associated with a CHO candidate cell, in response to meeting an execution condition of the CHO candidate cell; starting a timer for HO procedure or CHO procedure; and in response to successfully accessing the target cell or the CHO candidate cell, stopping the timer and transmitting assistant information to the target cell or the CHO candidate cell. In response to failing to perform the HO procedure or the CHO procedure, the UE performs a re-establishment procedure and selects one cell. If the selected cell is CHO candidate cell, the UE performs a CHO procedure and stores the information regarding whether an execution condition for each of the one or more CHO candidate cells is met or not.

In a first aspect, a communication control method is used in a cellular communication system. The communication control method includes receiving, by a relay node, a flow control feedback message or a failure occurrence notification message from a parent node of the relay node. The communication control method includes executing, by the relay node, a conditional handover in response to a certain period elapsing after receiving the flow control feedback message or the failure occurrence notification message.