Patent ID: 6636500
Filing Date: 2003-10-21
Classification: H04L,H04W

Abstract:
A method for use in wireless transmission in a system that has available to it a plurality of data modulation schemes, each said scheme mapping a different number of bits per symbol, the method comprising the steps of:determining a new data rate requirement for a user; and assigning time slots within a frame to match said user's data rate requirement; wherein, said assigning step further comprises the steps of analyzing a current data rate for said user by determining a data rate capable of being carried by each time slot currently assigned to said user given a current modulation scheme therefor; and altering the number of time slots assigned to said user when necessary to insure that the combined data rate of the time slots assigned to said user matches said user's new data rate requirement; the method being CHARACTERIZED in that said current modulation scheme is determined independently for each time slot assigned to said user within said frame, and being further CHARACTERIZED in that said assigning step assigns at least a first and second time slot to said user within said frame, each of said first and second time slot having had a modulation scheme determined for it, said determined and assigned modulation scheme for said first time slot being different from said determined and assigned modulation scheme for said second time slot.