Patent ID: 6370123
Filing Date: 2002-04-09
Classification: H04W

Abstract:
A method of half-duplex wireless communication comprising the steps of:transmitting from a base station to a plurality of mobile stations contained within one wireless communication cell that is serviced by the base station a Ready announcement indicating that the base station is ready to receive data on an uplink channel from the mobile stations, setting a random initial backoff time for each mobile station and transmitting from each mobile station a Request to Send announcement to the base station following expiration of the backoff time, transmitting from the base station to the mobile stations a Clear to Send announcement indicating that the first mobile station to have had its Request to Send announcement received in the base station can now transmit data, resubmitting the Request to Send announcements from the other mobile stations after a predetermined backoff time period has expired corresponding to a time period in which the first mobile station can transmit its data to the base station, and prioritizing any messages from the mobile stations by setting a higher probability that the base station will be in a receiving state rather than a transmitting state.