Patent ID: 6731907
Filing Date: 2004-05-04
Classification: H04W

Abstract:
A method for restricting a reverse call in a baste station, comprising the steps of:(a) calculating a noise power of the base station; (b) measuring a total receiving power of the base station; (c) calculating a cell loading factor of the base station using a ratio of the noise power to the total receiving power; (d) comparing the calculated cell loading factor of the base station with a predetermined threshold for call restriction; and, (e) restricting an incoming call to the base station according to the comparison result; wherein step (a) of calculating the noise power of the base station comprises the sub-steps of: (i) measuring the receiving power of the base station when there is no call for a predetermined time in the base station; and (ii) determining the measured receiving power of the base station as the noise power of the base station; and wherein the step (a) of calculating the noise power comprises the sub-steps of: (1) measuring a receiving attenuation value Ai,full and a receiving power Pi,full of the base station in a full blossom state so that the reverse service area of the base station becomes maximum; (2) measuring a receiving attenuation value Ai,part and a receiving power Pi,part of the base station in a partial blossom state so that the reverse service area of the base station is substantially less than that the full blossom state; and, (3) calculating the noise power of the base station using the receiving attenuation value and the receiving power of the base station measured in the full blossom state in step (1) and the partial blossom state in step (2).