Power control in a CDMA mobile communication system
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsMagnus Almgren, Bo Engström, Mårten Ericson
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Abstract
A method and apparatus for controlling transmission power levels in a CDMA cellular communication system are disclosed, whereby a third (middle) control loop is interposed between an inner loop and an outer loop to form a cascaded power control loop. Certain quality indicators are coupled to the outer loop and middle loop. The outer loop produces a quality target value for the middle loop. The middle loop produces the SIR target value.
Claims34
A power control loop system for a mobile communication system, comprising:
- a first control loop, said first control loop including a first quality error value estimator coupled to a first quality target value calculator;
- a second control loop, an input of said second control loop coupled to an output of said first control loop, said second control loop including a second quality error value estimator coupled to a second target value calculator;
- and
- a third control loop, an input of said third control loop coupled to an output of said second control loop, said third control loop including a SIR error value generator.
A method for controlling transmitter power in a mobile communication system, comprising the steps of:
- a first control loop estimating a first quality error value and calculating a first quality target value;
- a second control loop estimating a second quality error value and calculating a second quality target value;
- and
- a third control loop generating a SIR error value corresponding to said second quality target value.
Dependencies are inferred from the claim text.