In order to change control over a user equipment within a femtocell in accordance with a change in camping of the user equipment, a communication system includes a femto base station that provides a femtocell includes notification destination setting means for setting, in the femto base station, a notification destination to be notified of a change in camping of a user equipment on the femtocell. The square poly-spacer is formed adjacent a floating poly-gate sharing a common source line with another floating poly-gate. Authorized accesses must utilize service routines provided by the abstraction layer code.