Patent ID: 8315213
Filing Date: 2012-11-20
Classification: H04L,H04W

Abstract:
1. A method for allocating subchannels and time-slots of an OFDMA resource block of a downlink frame among mobile stations in a wireless access network in which the mobile stations are configured to communicate using more than one subchannel, the method comprising: calculating, for each mobile station of a plurality of mobile stations that have data to send, a ratio for each mobile station of a sum of instantaneous throughputs in all subchannels for said each mobile station to a time-averaged throughput for said each mobile station; selecting a group of the mobile stations from the plurality having the greatest ratios; generating a rate matrix comprising rate vectors of achievable throughputs of the selected group of mobile stations for the current time-slot; assigning available subchannels of a current time-slot of a current downlink frame to the selected mobile stations; and repeating the calculating and selecting to assign available subchannels of a next time-slot of the current downlink frame to at least some of the remaining mobile stations that have not been assigned a subchannel in a prior time-slot, wherein assigning comprises applying an optimization algorithm to the rate matrix to maximize time-slot throughput of the current time slot.