Patent ID: 7508861
Filing Date: 2009-03-24
Classification: H04B,H04J,H04W

Abstract:
1. A method of wireless transmission of packet data from a remote station in a communication network having a base station, the method comprising steps of: selecting an access preamble from a set of predefined preambles; spread-spectrum transmitting an access burst segment consisting of the selected preamble at a first discrete power level followed by a pilot, without any data of a message; during transmitting of the pilot, listening for an acknowledgement signal from the base station; if NO acknowledgement corresponding to the access preamble is detected while listening, spread-spectrum transmitting an access burst segment consisting of an access preamble from the set of predefined preambles at a second discrete power level higher than the first discrete power level followed by a pilot, without any data of a message; upon detecting an acknowledgement corresponding to a transmitted access preamble, ceasing access burst segment transmission; and beginning transmission of packet data of a message, for reception by the base station, following cessation of access burst segment transmission.