Patent ID: 8583099

Claim:
A method to be performed in a mobile communication system, the method comprising: receiving configuration information from a first base station, the configuration information received in a user equipment; transmitting an uplink signal from the user equipment to a plurality of second base stations to determine a location of the user equipment based on a service region of at least one of the second base stations that received the uplink signal from the user equipment, wherein the second base stations are short-range base stations and the first base station has a range greater than the short-range base stations, wherein the uplink signal includes random access (RA) information, wherein said transmitting includes transmitting at least one RA code to the second base stations at a predetermined power that is less than a power required to transmit a signal to the first base station; and receiving, from at least one of the second base stations, information including at least one RA code; comparing the at least one RA code received from the at least one second base station to the at least one RA code transmitted from the user equipment to the second base stations; and transmitting a message from the user equipment to the at least one second base station based on a result of the comparison, the transmitted message including a request for a predetermined service to be performed.