FIELD: communications engineering. SUBSTANCE: proposed base station and mobile station of code-division multiple access communication system carry out discontinuous data exchange in power control group unit or in control-support time interval unit to minimize noise. To this end during channel transfer system discontinuously transmits return-link pilot signal in control support state; upon invocation of allocated return control channel normal pilot signal first generated after invoking allocated return control channel is transmitted; then allocated return control channel is transferred. EFFECT: enhanced noise immunity. 40 cl, 38 dwg
