Patent ID: 6587510
Filing Date: 2003-07-01
Classification: H04W

Abstract:
A control information transmitting method for transmitting, to a communication partner, control symbols obtained by assigning control information for controlling transmission power to symbols of phase modulation, so as to control the transmission power of said communication partner, said control information transmitting method comprising the steps of:assigning said control information which indicates raising said transmission power of said communication partner and said control information which indicates lowering said transmission power of said communication partner to a pair of symbols having the longest Euclidian distance between the symbols from among said symbols of phase modulation; selecting said phase modulation to be multiple value amplitude phase modulation, in which symbols having the maximum and minimum amplitudes are excluded from all symbols; selecting four symbols, the respective phases of which are &pgr;/2 away from each other, from among the remaining symbols; assigning control information which indicates raising said transmission power and control information which indicates lowering said transmission power, respectively, to a pair of symbols the respective phases of which are &pgr; away from each other, from among the four symbols; and assigning control information which indicates holding said transmission power of said communication partner respectively to the remaining two symbols.