CDMA mobile communication system and transmission power control method therefor
First Claim
1. A CDMA (Code Division Multiple Access) mobile communication system comprising a base station and a mobile station connected to said base station by radio through reverse-link and forward-link control channels, said base station comprising:
- monitor means for monitoring a forward-link transmission power value radiated to said mobile station;
calculation means for, when the forward-link transmission power value becomes smaller than a predetermined steady output value, calculating system parameter information of said mobile station, which corresponds to the reduced forward-link transmission power value; and
notification means for notifying said mobile station of the system parameter information of said mobile station, which is output from said calculated means, and said mobile station comprising;
transmission power control means for, when said mobile station in a standby state starts originating/terminating operation to/from said base station, controlling a transmission power value of the reverse-link control channel from said mobile station on the basis of a value obtained from a reception field strength value of the forward-link control channel from said base station and the system parameter information of said mobile station, which is transmitted from said base station.
1 Assignment
0 Petitions
Accused Products
Abstract
A CDMA mobile communication system includes a base station and a mobile station. The base station includes a monitor section, calculating section, and notification section. The monitor section monitors a forward-link transmission power value radiated to the mobile station. When the forward-link transmission power value becomes smaller than a predetermined steady output value, the calculating section calculates system parameter information of the mobile station, which corresponds to the reduced forward-link transmission power value. The notification section notifies the mobile station of the system parameter information of the mobile station. The mobile station includes a transmission power control section. When the mobile station in the standby state starts originating/terminating operation to/from the base station, the transmission power control section controls the transmission power value of the reverse-link control channel from the mobile station on the basis of a value obtained from the reception field strength value of the forward-link control channel from the base station and the system parameter information of the mobile station. A transmission power control method for the above system is also disclosed.
73 Citations
11 Claims
-
1. A CDMA (Code Division Multiple Access) mobile communication system comprising a base station and a mobile station connected to said base station by radio through reverse-link and forward-link control channels,
said base station comprising: -
monitor means for monitoring a forward-link transmission power value radiated to said mobile station;
calculation means for, when the forward-link transmission power value becomes smaller than a predetermined steady output value, calculating system parameter information of said mobile station, which corresponds to the reduced forward-link transmission power value; and
notification means for notifying said mobile station of the system parameter information of said mobile station, which is output from said calculated means, and said mobile station comprising;
transmission power control means for, when said mobile station in a standby state starts originating/terminating operation to/from said base station, controlling a transmission power value of the reverse-link control channel from said mobile station on the basis of a value obtained from a reception field strength value of the forward-link control channel from said base station and the system parameter information of said mobile station, which is transmitted from said base station. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A transmission power control method for a mobile communication system for executing radio communication between a mobile station and a base station using a CDMA (Code Division Multiple Access) scheme, comprising the steps of:
-
monitoring a forward-link transmission power value radiated to the mobile station;
when the forward-link transmission power value becomes smaller than a predetermined steady output value, calculating system parameter information of the mobile station, which corresponds to the reduced forward-link transmission power value; and
when the mobile station in a standby state starts originating/terminating operation to/from the base station, determining a transmission power value of the reverse-link control channel from the mobile station on the basis of a value obtained from a reception field strength value of a forward-link control channel from the base station and the calculated system parameter information of the mobile station. - View Dependent Claims (9, 10, 11)
-
Specification