Patent ID: 6961582

Claim:
A transmission power control method for a CDMA communication system which performs communication between a basestation and a plurality of mobile stations; the transmission power control method comprising the steps of: receiving and measuring an uplink power transmitted from each of the plurality of mobile stations with a received SIR and a SIR requirement threshold at the basestation; and taking an iterative algorithm to get a convergent transmitted power; wherein (i) the iterative algorithm expresses that a (n+1)th transmitted power of the mobile station i equals a convergence factor multiplied with a (n)th transmitted power of the mobile station i, (ii) the convergence factor at the nth iteration equals a power convergence factor c (n) at the nth iteration over a determined factor (ρ (n) at the nth iteration. (iii) the determined factor (ρ (n) ) equals the received SIR of mobile station i at the nth iteration ( γ i ( n ) ) over the SIR requirement threshold at the basestation for mobile station and (iv) the iterative algorithm at the nth iteration further chooses the power convergence factor (c (n) ) at the nth iteration similar to the determined factor (ρ (n) ) at the nth iteration, i.e. c ( n ) ≈ ρ i ( n ) = ( γ i ( n ) β i ) ⁢ .