Communication system with femtocells and an interference control method therefor

A mobile station device for interference control, the device comprising:

• a receiver for receiving a notification of entry to a home cell from a macro base station, when the mobile station enters a macrocell including a femto base station with which the mobile station is registered;
• and
• a transmitter for transmitting a femtocell driving control message, including a User Identifier (UID) of the mobile station, to the femto base station at a predetermined transmission power,
• wherein the femto base station switches on a transmitter of the femto base station, which is previously switched off to control interference by the femto base station if a UID registration is verified by the femto base station.

An interference control method for a macro base station, the method comprising:

• transmitting a notification of entry to a home cell to a mobile station, when the mobile station enters a macrocell including a femto base station with which the mobile station is registered;
• and
• allocating a femtocell driving control resource for the mobile station to transmit a femtocell driving control message, including a User Identifier (UID) of the mobile station;
• wherein the femto base station switches on a transmitter of the femto base station, which is previously switched off to control interference by the femto base station if a (UID) registration is verified by the femto base station.

A macro base station device for interference control, the device comprising:

• a transmitter for transmitting a notification of entry to a home cell to a mobile station, when the mobile station enters a macrocell including a femto base station with which the mobile station is registered;
• and
• a controller for allocating a femtocell driving control resource for the mobile station to transmit a femtocell driving control message, including a User Identifier (UID) of the mobile base station;
• wherein the femto base station switches on a transmitter of the femto base station, which is previously switched off to control interference by the femto base station if a UID registration is verified by the femto base station.

An interference control method for a femto base station, the method comprising:

• receiving a femtocell driving control message from a mobile station at a predetermined transmission power, wherein the femtocell driving control message includes a User Identifier (UID) of the mobile station;
• verifying a registration of the UID;
• and
• switching a transmitter of the femto base station on according to the femtocell driving control message wherein the transmitter is previously switched off to control interference if the UID registration is verified by the femto base station.

A femto base station device for interference control, the device comprising:

• a transmitter;
• a receiver for receiving a femtocell driving control message from a mobile station at a predetermined transmission power, wherein the femtocell driving control message includes a User Identifier (UID) of the mobile station;
• and
• a controller for verifying a registration of the UID and for switching the transmitter of the femto base station on according to the femtocell driving control message wherein the transmitter is previously switched off to control interference if the UID registration is verified by the femto base station.