| 摘要 |
1. A method of controlling transmission power in a code division multiple access (CDMA) mobile communication system comprising a plurality of base stations (20A 1 , 20A 2 ) and a mobile station (20A) for making possible to communicate with said base stations by a soft handover, said method comprising the steps of:
(a) in said mobile station,
measuring (S101, S102) reception quality of each of the base stations to determine at least one specific base station in which forward transmission should be turned on in accordance with a predetermined reference value;
transmitting (S105) as a forward transmission power information signal, a combination of a base station information signal indicative of the at least one specific base station and an error detection information signal for carrying out error detection of the base station information signal to each of the base stations;
(b) in each of said base stations,
decoding (S201) the forward transmission power information signal to carry out the error detection on the base station information signal using the error detection information signal; determining (S204) whether or not an own base station is indicated by said base station information signal of the forward transmission power information signal;
and lowering (S202, S203, S204), in each of said base stations, transmission power in a forward transmission from an original value when an error is not detected in the error detection, and when its own base station does not correspond to said at least one specific base station indicated by the base station information signal. |
