Patent ID: 8364151

Claim:
A user apparatus which performs, when there is a change in a cell visited, a re-selection of a cell to camp on, comprising: a tracking area ID determining unit which determines whether a new ID of a tracking area that is transmitted from one or more base station apparatuses matches a tracking area ID of a cell visited immediately before the cell re-selection; a paging reception unit which conducts a paging reception using a paging parameter in the cell visited immediately before the cell re-selection when it is determined that the new ID of the tracking area matches the tracking area ID of the cell visited immediately before the cell re-selection; a receiving unit which receives a primary broadcast channel; a Layer 1/Layer 2 (L1/L2) processing unit which receives a physical downlink control channel specified using the primary broadcast channel and detects a resource location of a first scheduling unit specified in the physical downlink control channel; wherein the resource location provides the location of the first scheduling unit in both time and frequency; and a radio resource control (RRC) processing unit which, based on the resource location of the first scheduling unit, receives the first scheduling unit and obtains a tracking area ID that is included in the first scheduling unit.