Apparatus and method for controlling paging in heterogeneous wireless network system

A method of a macro evolved-NodeB (eNB1 controlling paging in a wireless network system supporting heterogeneous cells, the method comprising:

• receiving an Almost Blank Subframe (ABS) pattern, configured to have controlled transmission power in a subframe determined by taking an aggressor cell that generates interference between the heterogeneous cells into consideration, from an Operation and Management (OAM) for maintaining and managing the aggressor cell;
• detecting the aggressor cell based on the ABS pattern;
• changing a paging parameter for User Equipment (UE) so that interference with the aggressor cell is avoided based on the ABS pattern when detecting the aggressor cell;
• configuring a paging occasion indicative of a subframe on which a paging message is transmitted or a paging frame that is a radio frame comprising the at least one paging occasion based on the changed paging parameter;
• sending system information comprising the changed paging parameter to the UE;
• and
• sending the paging message for paging the UE to the UE in the paging frame or the paging occasion.

User Equipment (UE) for receiving a paging message in a wireless network system supporting heterogeneous cells, the UE comprising:

• a measurement unit for measuring a signal of a femto evolved-NodeB (eNB) that generates interference with the paging message of a macro eNB and generating a measurement report;
• a transmission unit for sending the measurement report to the macro eNB;
• a reception unit for receiving a request message, requesting information about the femto eNB, from the macro eNB and receiving a broadcast control channel (BCCH), comprising information about a Physical Cell IDentifier (PCID) identifying the femto eNB and an E-UTRAN Cell Global ID (ECGI) regarding the femto eNB, from the femto eNB;
• and
• an Automatic Neighbor Relation (ANR) processing unit for specifying the information about the PCID and the ECGI,
• wherein the transmission unit sends the information about the PCID and the ECGI to the macro eNB, and
• the reception unit receives the paging message based on a paging parameter changed by an Almost Blank Subframe (ABS) pattern configured to have controlled transmission power in a subframe determined by taking the femto eNB into consideration.

A method of User Equipment (UE) receiving a paging message in a wireless network system supporting heterogeneous cells, the method comprising:

• measuring a signal of a femto evolved-NodeB (eNB) that generates interference with the paging message of a macro eNB;
• sending a measurement report indicative of the measurement to the macro eNB;
• receiving a request message, requesting information about the femto eNB, from the macro eNB;
• receiving a broadcast control channel (BCCH), comprising information about a Physical Cell IDentifier (PCID) identifying the femto eNB and an E-UTRAN Cell Global ID (ECGI) regarding the femto eNB, from the femto eNB;
• and
• specifying the information about the PCID and the ECGI;
• sending the specified information about the PCID and the specified ECGI to the macro eNB, and
• receiving the paging message based on a paging parameter changed by an Almost Blank Subframe (ABS) pattern configured to have controlled transmission power in a subframe determined by taking the femto eNB into consideration.