MCDRR packet scheduling algorithm for multi-channel wireless networks

Abstract

In this paper we considered multi-channel Deficit Round Robin scheduler (MCDRR) for the multi-channel wireless networks to provide better fairness to the users. The scheduler needs to exploit channel availability to achieve higher network performance. The MCDRR scheduling algorithm was first implemented in hybrid TDM/WDM optical networks and this was mainly developed to study multi-channel communication. The results provided nearly perfect fairness with ill-behaved flows for different sets of conditions. Now shifting our focus back to wireless networks, many algorithms proposed for the multi-channel wireless networks have fairness issues. This paper address fairness issue by investigating the existing scheduler for the IEEE 802.11n multi-channel wireless network case to provide efficient fair queueing. We take into account the availability of channels, the availability of data packets and efficiently utilize channels to achieve better fairness. Simulation results show that the MCDRR for multi-channel wireless networks can provide nearly perfect fairness with ill-behaved flows for different sets of conditions. Finally, after comparing our results, we say MCDRR performs better than the existing schedulers Round-robin (RR) and Deficit round-robin (DRR) in terms of fairness and throughput.