| CPC H04W 52/52 (2013.01) [H04B 7/15535 (2013.01); H04W 24/08 (2013.01); H04W 52/245 (2013.01); H04W 52/367 (2013.01)] | 19 Claims | 

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               1. A method of power control for a repeater, in which the repeater is used to amplify cellular communication signals between a base station and a user equipment, the method comprising: 
            measuring a power of downlink signals received from the base station; 
                estimating a power of uplink signals transmitted from the user equipment, wherein the power of uplink signals is estimated based on the measured power of downlink signals and a power constant, and the power constant is an estimated closed-loop power control constant between the power of downlink signals and the power of uplink signals; and 
                determining a power of uplink signals transmitted to the base station, based on the estimated power of uplink signals. 
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