Abstract: A downlink resource scheduling scheme called real-time fair scheduling algorithm is proposed for cellular mobile telecommunication system which is based on orthogonal frequency division multiplexing technology. This algorithm achieves a relatively fair subchannel assigning scheme by a novel initialization for subchannel assignment, and then employs fairness precision parameters to control iterative loop for further optimization to make the subchannel assignment fairer, furthermore, this algorithm uses a minimal fairness index to make the assignment scheme fulfill the fairness restriction. Simulation analysis has proved that real-time fair scheduling algorithm could ensure all the users share the bandwidth resource fairly and fulfill predefine minimal fairness index in every scheduling interval.

Key words: orthogonal frequency division multiplexing, resource allocation, fair scheduling