MOBILE COMMUNICATION SYSTEM, USER APPARATUS AND METHOD

摘要

A disclosed user apparatus is for use in a mobile communication system including a macrocell and a closed cell wherein unspecified users are allowed to access the macrocell and specified users are allowed to access the closed cell. The user apparatus includes a measurement unit configured to measure quality of a signal provided from a camped cell in an idle state at a predefined cycle, a cell search unit configured to measure quality of a signal provided from a neighbour cell at a predefined cell search cycle, and a cell reselection unit configured to reselect a cell depending on the cell search result. A frequency of the macrocell is at least partially identical to a frequency of the closed cell. If the user apparatus resides in the macrocell and a predefined reselection criterion is satisfied, the closed cell adjacent to the camped cell is reselected as a standby cell. The predefined reselection criterion corresponds to a state where the quality of the signal provided from the closed cell has been higher than or equal to the quality of the signal provided from the camped cell by a predefined threshold for more than a predefined reselection duration.