a service method of a femtocell for simultaneously providing a plurality of femto services to a plurality of mobile stations , and a transmitter and receiver for the same . when a femto advanced base station supports a plurality of femtocell subscription types , and it simultaneously provides data services with different qualities to mobile stations having subscribed to different femtocells . the femtocell subscription type supported by the femto advanced base station is advertised to the mobile station through an identifier at a phy level or an identifier at a mac level . a csg - closed femtocell provides a high - quality data service to limited subscribers , a csg - open femtocell provides a relatively low quality data service to limited subscribers , and an osg femtocell provides the lowest quality data service to all mobile stations irrespectively of subscription states .