Reduction method of successive hard handoffs between base stations in code division multiple access (cdma) mobile communication system

Abstract

A reduction method of successive hard handoffs which prevents the call from dropping and the communication quality from deteriorating which are caused by the successive hard handoffs frequently occurring between base stations according to the system resources in the CDMA mobile communication system is disclosed. The reduction method includes the steps of making a decision on soft or hard handoff possibility according to the strength of the pilot signals of the existing base station holding a current call and the newly added base station by using the pilot strength measurement message received from the mobile station, informing the control station of the resource assignment possibility of the added base station by using the handoff request message transmitted from the control station to the added base station, and performing or completing handoffs according to said resource assignment success or failure. Therefore, since, hard handoffs in this method occurs after the mobile station is completely transferred to the added base station, the frequency of the hard handoff occurrences is reduced.