Variance based Scheduling to Improve the QoS Performance at the Cell Edge

Abstract: Now a days mobile phones are most often used for data communication rather than voice calls. Due to this change in user behavior, there is a need to improve the QoS received by the user. One of the ways of improving the QoS is an efficient scheduling algorithm which incorporates the needs of the users and variation in channel condition. The parameters used to measure the efficiency of the scheduling algorithms are the Jain Fairness Index and the overall system throughput. In this paper we have proposed a variance based scheduling algorithm which selects the user who has the highest variance of data transmitted in a given time frame as a parameter for scheduling. This ensures that eventually, the users transmit almost equal amounts of data regardless of channel condition. The simulation results shows that the proposed algorithm achieves high Jain Fairness Index of 0.92 with a lesser drop in the system throughput 18% as compared to Dynamically altering Proportionally Fair Algorithm's 20% using the Proportionally Fair Algorithm as reference.