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Multipath Routing in Wireless Mesh Networks

This paper discusses the implementation of multipath routing techniques within wireless mesh networks (WMNs) to improve traffic management and overall performance. In WMNs, traditional single-path routing can cause congestion on specific routes leading to packet loss and reduced throughput. By utilizing multiple parallel paths, the proposed multipath routing protocol enhances bandwidth, ensures fault tolerance, and balances traffic loads effectively. Simulation results demonstrate significant improvements in end-to-end throughput and reduced packet loss compared to single-path routing approaches.

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Multipath Routing in Wireless Mesh Networks

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  1. Multipath Routing in Wireless Mesh Networks Mobile Adhoc and Sensor Systems (MASS), 2006 IEEE International Conference on Author: Nagesh S. Nandiraju, Deepti S. Nandiraju, and Dharma P. Agrawal

  2. Outline • Introduction • MMESH • Traffic balancing • Performance Evaluation • Conclusion

  3. Introduction(1/2) • Wireless Mesh Networks are envisioned to support the wired backbone with a wireless backbone for providing internet connectivity to residential areas and offices. • Routing protocols designed for Mobile Adhoc Networks (MANETs) primarily concentrate on finding a single best possible route to any destination out of the various paths available.

  4. Introduction(2/2) • However in wireless mesh networks, traffic is primarily routed either towards the Internet Gateways (IGWs) or from the IGWs to the Access Points (APs). • Thus, if multiple APs choose the best throughput path towards a gateway, the traffic loads on certain paths and mesh routers increases tremendously thereby deteriorating the overall performance of the network.

  5. Multi-path routing in wireless meshnetworks (MMESH)(1/3) • Multipath routing is the routing technique of using multiple alternative paths through a network, which can yield a variety of benefits such as fault tolerance, increased bandwidth, or improved security.

  6. Multi-path routing in wireless meshnetworks (MMESH)(2/3) • This method provides better transmission performance and fault tolerance by providing: -Simultaneous, parallel transport over multiple carriers. -Load balancing over available assets. -Avoidance of path discovery when re-assigning an interrupted stream.

  7. Multi-path routing in wireless meshnetworks (MMESH)(3/3)

  8. Traffic balancing • Once we have these multiple routes setup, our task is to divide the traffic among these routes to balance the load, without degrading the performance. - Round Robin scheduling - Congestion aware routing

  9. Performance Evaluation

  10. Conclusion • This paper introduces the important propose a proactive multipath routing protocol which exploits the multiple routes between the MRs and the gateways to balance traffic load. • Simulation results reveal that single path routing leads to severe packet loss and consequently very low end –to-end throughput for longer hop length flows.

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