Patent ID: 7720014

Claim:
A method of managing a supplemental channel (SCH) in a mobile station (MS) in a mobile communication system, comprising the steps of: receiving first SCH assignment message notifying an assignment of a first SCH from a base station (BS), the first SCH assignment message comprising an assigned time for transmission on the first SCH and a duration during which the transmission is valid; receiving at least one frame on the first SCH without releasing the first SCH after the duration of the first SCH expires; and extending the duration of the first SCH using the received at least one frame; determining whether a second SCH assignment message is received before expiration of the first SCH duration; performing an error check on the at least one frame, when the second SCH assignment message is not received; receiving data on the at least one frame of the first SCH without releasing the first SCH if a result of the error check on the at least one frame indicates that the at least one frame is not erroneous.