초록 ▼

A multi-rate wireless communications system that supports a plurality of distributed user terminals in full-duplex simultaneous communications with a central base station, where each user terminal is provided on demand with one of multiple bit rates at a negotiated QOS is provided. Each user is assi

A multi-rate wireless communications system that supports a plurality of distributed user terminals in full-duplex simultaneous communications with a central base station, where each user terminal is provided on demand with one of multiple bit rates at a negotiated QOS is provided. Each user is assigned a variable bit rate, a variable processing gain, a variable transmit power and a unique fixed rate spreading code, resulting in a constant bandwidth signal received at a relative power level corresponding to the negotiated QOS. This application can be applied to systems including wireless local loop and mobile cellular. By adjusting signal energy and interference energy, variable bit rates and negotiated QOS parameters can be supported. The forward link between base-station and user terminal, and the reverse link between the user terminal and base-station, can correspond to either a Frequency Division Duplexing (FDD) arrangement where the forward and reverse links occupy different carrier frequencies but overlap in time, or a Time Division Duplexing (TDD) arrangement where the forward and reverse links occupy the same carrier frequency but are in non-overlapping time intervals.

대표청구항 ▼

[ What is claimed is:] [1.] A multi-rate communication system having a base station communicating with a plurality of active user terminals, and a requesting user terminal, each of said user terminals having a transmitter and a receiver, said base station comprising:means for receiving a message fro

[ What is claimed is:] [1.] A multi-rate communication system having a base station communicating with a plurality of active user terminals, and a requesting user terminal, each of said user terminals having a transmitter and a receiver, said base station comprising:means for receiving a message from said requesting user terminal to said base station, said requesting user terminal requesting communication using a desired data rate and a desired quality of service QOS parameter;means for determining a suitable data rate, a suitable QOS, and expected received signal power for said requesting user terminal based on said desired data rate and said desired QOS; andmeans for communicating said suitable data rate, said suitable QOS, and said expected received signal power to said requesting user terminal.