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Common packet channel

  • US 6,169,759 B1
  • Filed: 03/22/1999
  • Issued: 01/02/2001
  • Est. Priority Date: 03/22/1999
  • Status: Expired due to Term
First Claim
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1. In a code-division-multiple-access (CDMA) system employing spread-spectrum modulation comprising a base station (BS) comprising a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver, and a plurality of remote stations, each remote station (RS) comprising an RS-spread-spectrum transmitter and an RS-spread-spectrum receiver, a method comprising the steps of:

  • transmitting from said BS-spread-spectrum transmitter, a broadcast common-synchronization channel having a common chip-sequence signal, the broadcast common-synchronization channel comprising a frame-timing signal;

    receiving at an RS-spread-spectrum receiver of one remote station the broadcast common-synchronization channel, and determining frame timing at said RS-spread-spectrum receiver from the frame-timing signal;

    transmitting from an RS-spread-spectrum transmitter of the one remote station an access-burst signal, the access-burst signal comprising a plurality of segments having a plurality of respective power levels;

    receiving at said BS spread-spectrum receiver at least one segment of the access-burst signal at a detected-power level;

    responsive to receipt of the at least one segment transmitting an acknowledgment signal from said BS-spread-spectrum transmitter;

    receiving the acknowledgment signal at said RS-spread-spectrum receiver;

    transmitting from said RS-spread-spectrum transmitter, responsive to the receipt of the acknowledgment signal, a spread-spectrum signal comprising data; and

    transmitting from said BS-spread-spectrum transmitter, any of data and power control information, to said RS-spread-spectrum receiver.

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