Patent ID: 8548026

Claim:
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 at least one mobile station (MS) comprising an MS-spread-spectrum transmitter and an MS-spread-spectrum receiver, a method comprising steps of: transmitting from the MS-spread-spectrum transmitter of the one mobile station a spread-spectrum signal signifying a request to utilize an uplink channel; receiving the request to utilize the uplink channel from the one mobile station at the BS-spread-spectrum receiver; processing the received request to determine whether or not to grant the requested access; if the processing results in a determination to grant access, transmitting from the BS-spread-spectrum transmitter a spread spectrum signal comprising a channel-request-granted message for the one mobile station, the channel-request-granted message comprising control information specifying a transmission start time, an uplink modulation scheme, and a transmission length; receiving the channel-request-granted message from the base station at the MS-spread-spectrum receiver of the one mobile station; at the specified transmission start time, starting transmission of a spread spectrum signal containing packet data over the uplink channel from the MS-spread-spectrum transmitter of the one mobile station; and ceasing the transmission of the spread spectrum signal containing packet data over the uplink channel from the mobile station, upon completion of transmission of packet data of the specified transmission length.