Method of and system for determining the presence of mobile unit in service area in mobile communication network

Abstract

An object of the present invention is to provide a system for determining whether or not a mobile unit is present in the service area of a repeater through a simple system. A method of determining the presence of a mobile unit in a service area in a mobile communication network having a mobile unit, a radio base station apparatus for communicating with the mobile unit with a radio signal, and a radio relay unit for amplifying a radio signal in both directions between said radio base station apparatus and said mobile unit, comprising the steps of: assigning, in said radio relay unit, an identification code, for identifying a service area provided by said radio relay unit, to a radio signal transmitted from said radio base station apparatus to said mobile unit; including, in the radio base station apparatus, a broadcast control signal that is used by the identification signal transmitted to said mobile unit; and confirming, in said mobile unit, whether or not the mobile unit is present in a service area provided by said radio relay unit, by using said identification code and said broadcast control information, and, if it is confirmed that the mobile unit is present in the service area provided by said radio relay unit, transmitting a signal indicative of the presence of the mobile unit in the service area provided by said radio relay unit to said radio base station apparatus.

Dependencies are inferred from the claim text.