Apparatus for initial power control for spread-spectrum communications

An apparatus for maintaining control of power in a spread-spectrum system, comprising:

• (a) base means;
• and
• (b) subscriber means, for sending to the base means using spread-spectrum modulation, a code on a status channel, wherein:
• (i) the base means detects the first spreading code from the subscriber means, and sends to the subscriber means, using spread-spectrum modulation, in response to detecting the first spreading code, a second spreading code on a checkup channel;
• and
• (ii) the subscriber means detects the second spreading code on the checkup channel, and in response to detecting the second spreading code, the subscriber means transmits a message longer than the first spreading code, at a transmit power based on the detected first spreading code's transmit power and in response to not detecting the second spreading code, the subscriber means increases transmit power of the subscriber means.

An apparatus for maintaining control of power in a spread-spectrum system, comprising:

• (a) a base station (BS);
• and
• (b) a subscriber unit (SU) for sending to the BS, using spread-spectrum modulation, a SU-spreading code on a status channel, wherein:
• (i) the BS detects the SU-spreading code from the SU, and sends to the SU, using spread-spectrum modulation, in response to detecting the SU-spreading code, a BS-spreading code on a checkup channel;
• and
• (ii) the SU detects the BS-spreading code on the checkup channel, and in response to detecting the BS-spreading code, the SU transmits a message longer than the SU-spreading code, at a higher transmit lower with respect to the detected SU-spreading code's transmit power, and in response to not detecting the BS-spreading code, the SU increases transmit power of the SU.