A method (400) for reporting radio link failure, RLF, information. The method includes a user equipment, UE, detecting (s402) an RLF with respect to a master cell group, MCG. The method also includes, in response to detecting the RLF with respect to the MCG, the UE storing (s404) RLF information. The method also includes the UE sending (s406) a first message comprising MCG failure information, e.g., the RLF information, and activating a timer. The method also includes the UE receiving (s408) a second message after sending the first message and activating the timer. The method also includes the UE, in response to receiving the second message, determining (s410) that a condition is satisfied, wherein determining that the condition is satisfied comprises at least determining that the timer is still running. The method also includes, as a result of determining that the condition is satisfied, the UE deleting (s412) the RLF information.

The present disclosure relates to a method and apparatus for transmitting and receiving data in a wireless communication system. An operating method of a terminal that is able to communicate with a master node and a secondary node in a wireless communication system includes detecting a master cell group (MCG) failure related to the master node, in response to the detecting of the MCG failure, changing a primary path of a split signaling radio bearer 1 (SRB1) from a radio link control (RLC) bearer of an MCG related to the master node to one RLC bearer from among a plurality of RLC bearers of a secondary cell group (SCG) related to the secondary node, based on a pre-determined criterion, and transmitting a message related to the MCG failure to the master node, by using the RLC bearer of the SCG changed as the primary path.

A communication method, an apparatus, and a communications system. A terminal device receives first configuration information. In response to an RLF occurring in a source MCG or a source SCG of the terminal device, the terminal device sends a first message including information about a time period from the terminal device receiving the first configuration information to the radio link failure occurring in the source MCG or the source SCG, or information about a time period from the RLF occurring in the source MCG or the source SCG to the terminal device sending the first message. In this way, a network device exchanges proper and valid information between network devices based on the information reported by the terminal device, to optimize parameters.

Example embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media for a primary secondary cell (PSCell) change failure. In example embodiments, a master network device receives, from a source secondary network device, a first request for a change of a terminal device from the source secondary network device to a target secondary network device. The master network device receives, from the source secondary network device, an identification of a source PSCell operated by the source secondary network device and serving the terminal device prior to the first request. The master network device further receives, from the terminal device, an indication of a radio link failure of the terminal device in a PSCell and transmits the indication of the radio link failure to the source secondary network device along with the identification of the source PSCell.

A transmission control method includes sending or receiving, by a first device, first data to or from a second device through a first communication connection, detecting, by the first device when sending or receiving the first data to or from the second device through the first communication connection, that an error has occurred on the first communication connection, and sending, by the first device, error information of the first communication connection to the second device through a second communication connection, where the second communication connection is different from the first communication connection, and the error information indicates that the error has occurred on the first communication connection.

The disclosure relates to a method and apparatus for reporting a radio link failure (RLF) in a mobile communication system. According to an embodiment of the disclosure, a method, performed by a user equipment, of reporting an RLF includes detecting a first RLF during use of a first radio access technology (RAT), accessing a base station by using a second RAT different from the first RAT, and transmitting a report on the first RLF to the base station by using the second RAT.

Some aspects relate to apparatuses and methods for implementing mechanisms for performing handover, radio link monitoring (RLM), beam failure detection (BFD), and candidate beam detection (CBD) within the unlicensed spectrum when a listen-before-talk (LBT) failure occurs and/or when a user equipment (UE) performs receiving (RX) beam sweeping. For example, a UE is configured to receive a handover command to connect 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 a LBT failure or the UE performing a beam sweeping operation. The UE can further determine a handover delay based on the search time and the interruption time uncertainty. In response to a time period for performing the handover procedure exceeding the handover delay, the UE can cease the handover procedure.

The present application discloses a method and a device used in a communication node for wireless communications. The communication node receives a first signaling, the first signaling being used for indicating at least a first target cell and a second target cell; and performs a first handshake process for the first target cell; and performs a second handshake process for the second target cell; and determines whether to initiate an RRC connection re-establishment procedure according to whether at least one of the first handshake process or the second handshake process is successfully completed; neither the first handshake process nor the second handshake process being successfully completed is used to determine to initiate the RRC connection re-establishment procedure; either the first handshake process or the second handshake process being successfully completed is used to determine not to initiate the RRC connection re-establishment procedure.

A method for transmitting a channel state by a terminal in a communication system, according to one embodiment, comprises the steps of: receiving discontinuous reception (DRX) configuration information from a base station; determining whether the terminal is set to transmit channel state information only in onDuration according to a DRX operation; determining whether an arbitrary subframe to be received is a subframe included in onDuration if the terminal is set to transmit the channel state information only in onDuration according to the configuration; and not transmitting the channel state information on the arbitrary subframe if the arbitrary subframe is not a subframe included in onDuration. According to the embodiment, the terminal can efficiently report channel state information.

There is provided a method comprising: upon detecting that a first condition is met, causing a transmission of a measurement report to a wireless network; acquiring a conditional handover command from the wireless network; upon detecting that a second condition, associated with the conditional handover command, is met, starting a handover execution timer for triggering execution of a handover from a source cell to a target cell; detecting that a radio link failure condition is met before the execution of the handover is triggered; and on the basis of the detecting, signaling, to the wireless network, information indicative of a cause of a conditional handover failure to be either misconfigured first condition or misconfigured second condition.