Indian Journal of Science and Technology

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Mathematical models of queuing systems play an important role in the analysis of various networks. Queuing mechanisms are essential to manage congestion in heterogeneous network traffic. By applying appropriate queuing models in the current network scenario, the performance of network can be enhanced in a great way. In this context, to improve the network performance, a Low Latency Weighted Fair Queuing with Differential Packet Dropping (LLWFQD) approach is proposed in this paper. The complexity of the WFQ is solved by differential packet dropping method. In differential packet dropping approach the packets with different flows are dropped to achieve fairness. This packet dropping approach is applied to TCP flows in a queue. The results are analyzed with NS-2 for various bottleneck bandwidth and flow rates by considering the throughput, packet loss and delay as performance measures. The results of LLWFQD model are compared with WFQ and the corresponding improvements are shown in graphs. The results show the performance enhancement of LLWFQD than WFQ.

Keywords

Fair Queuing, Low Latency Queuing, Packet Dropping, QoS, Real Time Flows
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