Transmission power control method and a transmission power control apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 31, 1996
Grant Date -
N/A
app pub date -
May 11, 1995
filing date -
May 12, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A transmission power control method of a mobile station in a CDMA (Code Division Multiple Access) system which primarily controls transmission power of the mobile station by using a closed loop control which enables high accuracy power control. When the received power at the base station of a signal from the mobile station suddenly increases owing to the state of buildings surrounding the mobile station, the transmission power of the mobile station must be quickly reduced to prevent the interference to other mobile stations. The mobile station measures an average value of the received power per transmission power control period of a desired signal from the base station, and detects the difference .DELTA.RSSI between the current average value and that of one of the previous transmission power control periods. If .DELTA.RSSI exceeds a reference power difference .DELTA.P.sub.th, transmission power P.sub.T corresponding to .DELTA.RSSI is set by using an open loop transmission power control to quickly reduce the transmission power of the mobile station. If .DELTA.RSSI is lower than .DELTA.P.sub.th, the transmission power P.sub.T is determined in accordance with the transmission power control bit sent from the base station.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully