Patent ID: 7486934
Filing Date: 2009-02-03
Classification: H04B,H04W

Abstract:
1. A service area determination method in a CDMA mobile communication system that uses repeaters, said service area determination method determining in a radio base station whether a mobile station is within the service area of a repeater or within the service area of a radio base station; said service area determination method comprising steps of: storing in advance in a radio base station a propagation delay-propagation loss table in which a first area and a second area are set in advance, said first area being an area that is predicted to contain the relation between propagation delay and propagation loss when a mobile station is within the service area of a radio base station, and said second area being an area in which the effect of the control delay and power gain of a repeater upon said first area is taken into consideration; in the radio base station, using the difference in timing between a downlink dedicated physical control channel and an uplink dedicated physical control channel to calculate propagation delay; determining whether the relation between a propagation loss value that is reported from the mobile station to the radio base station and said propagation delay that has been calculated in the radio base station is contained in said first area or contained in said second area in said propagation delay-propagation loss table; and determining that the mobile station is within the service area of the radio base station if the relation between propagation delay and propagation loss value is contained in said first area in said propagation delay-propagation loss table, and determining that the mobile station is within the service area of the repeater if contained in said second area.