The disclosure relates to a fifth generation (5G) or sixth generation (6G) communication system for supporting higher data rates. A method for optimizing conditional primary secondary cell (PSCell) addition/change (CPAC) in a communication system and an apparatus capable of performing the same are provided. The method includes a method for reporting successfully completed (C)PAC-related information and CPAC failure-related information.

The disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method and apparatus for handling sidelink communication according to type of handover are provided.

A network-changing method and apparatus, and a terminal are provided. The method is executed by a terminal and includes: during reception of services from a first network, determining that access to a second network is necessary; starting a first timer, where duration of the first timer is not identical for the terminal compared to other terminals that need to access the second network; and attempting to access the second network upon expiration of the first timer.

Provided are a resource allocation method, device and system. The method includes: a network device allocating in advance, to the terminal device according to information associated with prediction of a service required by a terminal device, a network resource for subsequent service transfer. The resource allocation method, device and system provided in an embodiment of the invention enable a terminal to perform subsequent service transfer according to a network resource allocated in advance by a network device.

Methods and apparatuses in a wireless communication system. A method of operating a base station (BS) includes generating an indicator indicating that the BS is capable of supporting a high-capacity radio network temporary identifier (HC-RNTI), wherein a size of the HC-RNTI is based on a configurable granularity; generating a system information block including the indicator and information indicating the size of the HC-RNTI; transmitting, to a user equipment (UE), the system information block; and transmitting, to the UE, the HC-RNTI, wherein the HC-RNTI is allocated to the UE.

Embodiments of the present application provide methods for determining a frequency point and a terminal device. A method includes: a terminal device receives Doppler frequency offset assistance information; and the Doppler frequency offset assistance information is used to determine an actual frequency point to be measured or an actual frequency point of downlink synchronization of a target cell.

A cell handover method and an apparatus are provided. The method includes: determining an AI target cell, where the AI target cell is a predicted serving cell to which a terminal device can be handed over; and sending a first request message, where the first request message is used to request a network device corresponding to the AI target cell to allocate, to the terminal device, a resource corresponding to the AI target cell. The first request message indicates at least one of the following: identification information of the AI target cell, a type of the handover being AI handover, activation time information, expiration time information, prediction accuracy of the AI target cell, or the like. The activation time information indicates an earliest moment at which the terminal device is handed over to the AI target cell.

A method by a wireless communication network for handling one or more duplicated packet data convergence protocol (PDCP) packets is described. The method includes sending, by a master node, a request for a configuration for duplication to a secondary node, and providing, by a secondary node, a mapping configuration for duplication in a secondary cell group (SCG) to a user equipment (UE).

A method and an apparatus for controlling a waiting time related to determination of a radio link failure in a wireless communication system are provided. The method includes receiving a message from a network, if a first timer for determination of the radio link failure is running and the message includes timer information related to the waiting time, starting a second timer related to the waiting time based on the timer information, and if the second timer expires before expiration of the first timer, determining a channel situation of a serving cell as a situation of the radio link failure.

A method for a user equipment (UE) to deliver one or more duplicate packet data convergence protocol (PDCP) packets of a radio bearer is described. The method comprises selecting at least one physical radio resource block on one or more allowed serving cells to deliver the one or more duplicate PDCP packets after receiving an activation message of packet duplication to activate at least one logical channel corresponding to the radio bearer to deliver the one or more duplicate PDCP packets. The method also comprises stopping applying the one or more allowed serving cells to the at least one logical channel when receiving a deactivation message of packet duplication.