Patent ID: 6614773
Filing Date: 2003-09-02
Classification: H04W

Abstract:
A method for communicating comprising the steps of:a mobile unit that wishes to transmit information in the form of packets, over a first wireless, shared, inbound channel to a non-mobile base station, determines, based on information derived from a second wireless channel that is other than said first wireless channel and logically distinct from a outbound channel by which said mobile unit receives information packets from said non-mobile base, whether the first wireless channel is busy, when the first wireless channel is busy, the mobile unit refrains from transmitting, when the first-wireless channel is not busy, the mobile unit transmits a packet of information, when said packet is a data packet, the mobile unit also determines, based on information from said second wireless-channel, whether a collision has occurred with a transmission of a packet by some other mobile unit, when said packet is a data packet and the mobile unit determines the existence of said collision, the mobile unit stops transmitting said packet, when said packet belongs to a voice source and it is a first packet of said voice source, the mobile unit determines, based on information from said second wireless channel, whether a collision has occurred with a transmission of a packet by some other mobile unit, when said packet belongs to said voice source and it is a first packet of said voice source, and the mobile unit determines the existence of said collision, the mobile unit stops transmitting said packet, and when said packet belongs to said voice source and it is other than said first packet of said voice source, the mobile unit transmits the entire packet without determining whether a collision has occurred with a transmission of a packet by some other mobile unit.