Wireless communication method and User Equipment

A wireless communication method, comprising: receiving a configuration by a User Equipment (UE) in a serving cell of a mobile communication network, wherein the configuration comprises information for performing a random access channel (RACH) procedure with a neighbor cell, wherein the neighbor cell belongs to a set of active cells configured by the network; performing the RACH procedure with the neighbor cell, wherein the UE acquires a timing advance (TA) of the neighbor cell; receiving a handover command from the network to handover from the serving cell to the neighbor cell, wherein the UE acquires the TA of the neighbor cell before receiving the handover command; and completing the handover to the neighbor cell without performing additional RACH procedure after receiving the handover command.