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Soundararajan S.,Velammal Institute of Technology | Bhuvaneswaran R.S.,Anna University
Journal of Computer Science | Year: 2012

Problem statement: Load balancing and network congestion are the major problems in Mobile Ad-hoc Networks (MANET) routing. Most of the existing routing protocols provide solutions to load balancing or congestion or fault-tolerance, individually. Approach: We propose congestion controlled adaptive multi-path routing protocol to achieve load balancing and avoid congestion in MANETs. The algorithm for finding multi-path routes computes fail-safe multiple paths, which provide all the intermediate nodes on the primary path with multiple routes to destination. The fail-safe multiple paths include the nodes with least load and more battery power and residual energy. When the average load of a node along the route increases beyond a threshold, it distributes the traffic over disjoint multi-path routes to reduce the traffic load on a congested link. Results: The proposed work is implemented in NS2 and the performance metrics like throughput, packet delivery ratio, delay and overhead are measured and compared with existing protocol. Conclusion/Recommendations: Simulation results show that the proposed algorithm efficiently solves the problem of load balancing, network congestion and fault tolerance The proposed algorithm can alos be applied over any multipath routing protocol. © 2012 Science Publications. Source


Soundararajan S.,Velammal Institute of Technology | Bhuvaneswaran R.S.,Anna University
2012 2nd International Conference on Digital Information and Communication Technology and its Applications, DICTAP 2012 | Year: 2012

In mobile ad hoc network (MANET), congestion is one of the most important restrictions that deteriorate the performance of the whole network. Multipath routing can balance the load better than the single path routing in ad hoc networks, thereby reducing the congestion by dividing the traffic in several paths. This paper presents a new approach Multipath Load Balancing and Rate Based Congestion Control (MLBRBCC) based on rate control mechanism for avoiding congestion in network communication flows. The proposed approach contains an adaptive rate control based technique in which the destination node copies the estimated rate from the intermediate nodes and the feedback is forwarded to the sender through an acknowledgement packet. Since the sending rate is adjusted based on the estimated rate, this technique is better than the traditional congestion control technique. Simulation results show that proposed technique has better packet delivery ratio and improved throughput and also controls the congestion in more effective manner. © 2012 IEEE. Source


Karthikeyan R.,Velammal Institute of Technology | Sundarapandian V.,Vel Tech Dr.RR & Dr.SR Technical University
Journal of Electrical Engineering | Year: 2014

This paper investigates the hybrid chaos synchronization of identical Wang four-scroll systems (Wang, 2009), identical Liu-Chen four-scroll systems (Liu and Chen, 2004) and non-identical Wang and Liu-Chen four-scroll systems. Active control method is the method adopted to achieve the hybrid chaos synchronization of the four-scroll chaotic systems addressed in this paper and our synchronization results are established using Lyapunov stability theory. Since the Lyapunov exponents are not required for these calculations, the active control method is effective and convenient to hybrid synchronize identical and different Wang and Liu-Chen four-scroll chaotic systems. Numerical simulations are also shown to illustrate and validate the hybrid synchronization results derived in this paper. © 2014 FEI STU. Source


Maragathasundari S.,Sathyabama University | Maragathasundari S.,Velammal Institute of Technology | Srinivasan S.,B.S. Abdur Rahman University
Mathematical Problems in Engineering | Year: 2014

The present investigation deals with analysis of non-Markovian queueing model with multistage of services. When the server is unavailable during the system breakdown (or) vacation periods, we consider reneging to prevail. Supplementary variable techniques have been adopted to obtain steady state system length distributions. The numerical illustrations are provided to validate the tractability of performance measures as far as computational aspect is concerned. Numerical results in the form of graphical representation are also presented. Practical large scale industry applications are described to justify our model. © 2014 Sivagnanasundararam Maragathasundari and Santhanagopalan Srinivasan. Source


Soundararajan S.,Velammal Institute of Technology | Bhuvaneswaran R.S.,Anna University
Journal of Information and Computational Science | Year: 2012

In mobile ad hoc networks, the on demand multi-path routing protocols addresses certain issues such as more message overheads, link failures and node's high mobility. More message overheads are caused due to increased flooding. Packets are dropped by intermediate nodes due to frequent link failures. Moreover the overall throughput and the packet delivery ratio is reduced in high mobility scenarios. In order to overcome the issues an efficient multi-path routing protocol ABMRLBCC (Ant Based Multi-path Routing for Load Balancing and Congestion Control) based on Ant Colony Optimization is proposed. The multipath routing algorithm sets up path only when it is needed at the start of a data session. The forward ants are launched by the source in order to find multiple paths to the destination, and backward ants return the source to set up the paths. A reactive path is set up by the forward ant which provides the routing information of a node. The best path for each ant is selected based upon the number of hops and travel time. The proposed scheme has been experimented with NS2 and results show that the proposed approach outperforms in terms of better packet delivery ratio and reduced end-to-end delay. © 2012 Binary Information Press. Source

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