Patent ID: 6272117
Filing Date: 2001-08-07
Classification: H04L,H04W

Abstract:
A two-way wireless data network, comprising:a communication channel providing first and second sets of time slots;a plurality of mobile wireless data terminals each having a transceiver for communicating by radio in said communication channel, said plurality of mobile wireless data terminals being assigned said second set of time slots for transmitting a request for access to said communication channel;a base station serving a service area and having a transceiver for communicating by radio in said communication channel, said base station sending a message in said first set of time slots indicating whether said communication channel is available;wherein said plurality of mobile wireless data terminals monitor said communication channel for said message from said base station; a first one of said plurality of mobile wireless data terminals transmits said request for access in said second set of time slots upon receiving said message; and said base station, upon receiving said request for access, grants said request for access to said communication channel to said first one of said plurality of mobile wireless data terminals.