Comparative Analysis of Congestion Control Algorithms Using ns-2
In order to curtail the escalating packet loss rates caused by an exponential increase in network traffic, active queue management techniques such as Random Early Detection (RED) have come into picture. Flow Random Early Drop (FRED) keeps state based on instantaneous queue occupancy of a given flow. FRED protects fragile flows by deterministically accepting flows from low bandwidth connections and fixes several shortcomings of RED by computing queue length during both arrival and departure of the packet. Stochastic Fair Queuing (SFQ) ensures fair access to network resources and prevents a busty flow from consuming more than its fair share. In case of (Random Exponential Marking) REM, the key idea is to decouple congestion measure from performance measure (loss, queue length or delay). Stabilized RED (SRED) is another approach of detecting nonresponsive flows. In this paper, we have shown a comparative analysis of throughput, delay and queue length for the various congestion control algorithms RED, SFQ and REM. We also included the comparative analysis of loss rate having different bandwidth for these algorithms.
Keywords: Stochastic Fair Queing (SFQ), Random Early Detection (RED), Random Exponential Marking (REM), First In First Out (FIFO), Throughput, Delay, Queue length, Loss rate, and Utilization.
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ABOUT THE AUTHORS
Sanjeev Patel
Deptt. of Computer Sc. & Engg, Jaypee Institute of Information Technology, Noida, UttarPradesh, 201307, India
P. K. Gupta
2 Deptt. of Computer Sc. & Engg, Jaypee University of Information Technology, Waknaghat, Solan, Himachal Pradesh, 173215, India
Arjun Garg
Deptt. of Computer Sc. & Engg, Jaypee University of Information Technology, Waknaghat, Solan, Himachal Pradesh, 173215, India
Prateek Mehrotra
Deptt. of Electronics & Communication Engg., Jaypee University of Information Technology, Waknaghat, Solan, Himachal Pradesh, 173215, India
Manish Chhabra
Deptt. of Electronics & Communication Engg., Thapar University, Patiala, Punjab, 147004, India
Sanjeev Patel
Deptt. of Computer Sc. & Engg, Jaypee Institute of Information Technology, Noida, UttarPradesh, 201307, India
P. K. Gupta
2 Deptt. of Computer Sc. & Engg, Jaypee University of Information Technology, Waknaghat, Solan, Himachal Pradesh, 173215, India
Arjun Garg
Deptt. of Computer Sc. & Engg, Jaypee University of Information Technology, Waknaghat, Solan, Himachal Pradesh, 173215, India
Prateek Mehrotra
Deptt. of Electronics & Communication Engg., Jaypee University of Information Technology, Waknaghat, Solan, Himachal Pradesh, 173215, India
Manish Chhabra
Deptt. of Electronics & Communication Engg., Thapar University, Patiala, Punjab, 147004, India
