Modified Queue-Based Exponential Rule Scheduler for Improved QOS in OFDMA Systems

In our paper, we propose a modification of queue based exponential scheduler that dynamicallyimproves the channel gain of far away users (by increasing their credits) at the cost of a small reductionof the same for the nearby users(by reducing the credits), since users nearby anyway have a fairly highgain. Results clearly suggest that the proposed method is able to maintain a constant averagethroughput(always greater than that of the P.F scheduling) while it far outperforms the P.F and Queue-Based Exponential Rule Scheduler in the delay characteristics. The throughput fairness index wasinterestingly observed to improve with increasing number of users while it worsens for the other twoschemes.