Method for operating femtocell in wireless communication system

Abstract

A method for operating a femtocell in a wireless communication system comprises the steps of: triggering the switching from the operation mode for providing a service to closed subscriber group (CSG) terminals which belong to a specific terminal group and to non-CSG terminals which do not belong to the specific terminal group, to the operation mode for providing the service only to said CSG terminals; and commanding said non-CSG terminals to change the operation mode, and carrying out a handover. The method of the present invention improves efficiency of femtocell operation, and reduces restrictions on terminals disposed in the vicinity of the femtocell. The method of the present invention can utilize the unused frequency range of the femtocell, thereby providing a service with a high data ratio.

1 . A method for receiving, by a non-closed subscriber group (CSG) terminal, a service in a wireless communication system, the method comprising:
 receiving the service from a first home base station configured for a first operation mode,   wherein the first operation mode is an operation mode that the service is provided to a closed subscriber group (CSG) terminal that belongs to a specific terminal group and a non-CSG terminal that does not belong to the specific terminal group; and   determining whether to perform a handover to a second home base station based on whether the service can be continuously provided to the non-CSG terminal by the first home base station, wherein:   when the service is not continuously provided to the non-CSG terminal by the first home base station, performing the handover to the second home base station, and   when the service is continuously provided to the non-CSG terminal by the first home base station, a data rate for the service is reduced.   
     
     
         2 . The method of  claim 1 , further comprising:
 receiving, from the first home base station, a service adjustment message; and   transmitting, to the first home base station, an acknowledgement message in response to the service adjustment message,   wherein if the acknowledgement message is received by the first home base station, the service is provided continuously from the first home base station.   
     
     
         3 . The method of  claim 1 , further comprising:
 receiving, from the first home base station, a control message for time when the first home base station switches to a second operation mode,   wherein the second operation mode is an operation mode that the service is provided only to the CSG terminal.   
     
     
         4 . The method of  claim 1 , wherein the second home base station is a base station capable of communicating with the CSG terminal and the non-CSG terminal. 
     
     
         5 . A non-closed subscriber group (CSG) terminal for receiving a service in a wireless communication system, comprising:
 a transmitter configured to transmit a wireless signal;   a receiver configured to receive the wireless signal; and   a processor configured to:   receive the service from a first home base station configured for a first operation mode,   wherein the first operation mode is an operation mode that the service is provided to a closed subscriber group (CSG) terminal that belongs to a specific terminal group and a non-CSG terminal that does not belong to the specific terminal group; and   determine whether to perform a handover to a second home base station based on whether the service can be continuously provided to the non-CSG terminal by the first home base station, wherein:   when the service is not continuously provided to the non-CSG terminal by the first home base station, perform the handover to the second home base station, and   when the service is continuously provided to the non-CSG terminal by the first home base station, a data rate for the service is reduced.   
     
     
         6 . The terminal of  claim 5 , wherein the processor is further configured to:
 receive, from the first home base station, a service adjustment message; and   transmit, to the first home base station, an acknowledgement message in response to the service adjustment message,   wherein if the acknowledgement message is received by the first home base station, the service is provided continuously from the first home base station.   
     
     
         7 . The terminal of  claim 5 , wherein the processor is further configured to:
 receive, from the first home base station, a control message for time when the first home base station switches to a second operation mode,   wherein the second operation mode is an operation mode that the service is provided only to the CSG terminal.   
     
     
         8 . The terminal of  claim 5 , wherein the second home base station is a base station capable of communicating with the CSG terminal and the non-CSG terminal. 
     
     
         9 . The method of  claim 1 , wherein the first home base station is a home NodeB (HNB) or a home eNodeB (HeNB). 
     
     
         10 . The terminal of  claim 5 , wherein the first home base station is a home NodeB (HNB) or a home eNodeB (HeNB).