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Wireless Sensor Network for Tracking the Traffic in INTERNET Network Routers Part 2

Networked Software Systems Laboratory Department of Electrical Engineering Technion. Wireless Sensor Network for Tracking the Traffic in INTERNET Network Routers Part 2. Supervisor: Mark Shifrin Students: Yuri Kipnis Nir Bar-Or Date: 30 September 2009.

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Wireless Sensor Network for Tracking the Traffic in INTERNET Network Routers Part 2

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  1. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Wireless Sensor Network for Tracking the Traffic in INTERNET Network Routers Part 2 Supervisor: Mark Shifrin Students: Yuri Kipnis Nir Bar-Or Date: 30 September 2009

  2. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Agenda • Terms We Use • Introduction • Project Goals • Load Balancing Algorithm • Simulation Results • Conclusions • Further Development

  3. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Terms We Use • Routers Network • WSN – wireless sensor network • Bellman-Ford algorithm & Shortest Path Tree (SPT) • Load Balancing • CWND – congestion window in TCP protocol • Packet loss rate

  4. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Introduction • Solutions of improving network performance • Local network solutions • Network protocols • WSN and Routers Network platform simulation • Dynamic NS-2 platform, TCL • WSN and Routers Network • Load Balancing Algorithm • Bellman-Ford Algorithm

  5. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Project Goals • Investigation of existed solutions • Development and implementation of algorithm for improving network performance by using WSN network • Running various parameterized simulations on different network topology with new algorithm • Gathering simulation results, building graphs and comparing VS. regular simulation results

  6. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion The Problem 3 0 What is the problem? 1 2 5 4 Load Balancing

  7. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Load Balancing Algorithm - Global • Performs for all stations simultaneously pereodicly • Counting the shortest path from source to destination by Bellman-Ford algorithm for SPT • For each path in the SPT: if the last node is a destination of the root in routing table then calculate the load on current path and on the new path • Update this path by changing an old one by new one: • add new edges • move edges that are not used by other flows that don’t contain the first station of old path.

  8. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Load Balancing Algorithm – pseudo code • For each node do: • 1. Create SPT for node • 2. newFlow list <- empty • 3. Go pre-order on the SPT, for each newPath do: • 3.1Is the last node in new path is a destination in RT of first node? • 3.1.1No, go to 3 • 3.1.2Yes, Try to improve

  9. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Load Balancing Algorithm – pseudo code • Try to improve: • Calculate currPath between the first node of newPath and the last node of newPath • Get all flows that use currPath and have destination identical to newPath last node • Calculate the bottleneck of all these flows on old path • Is the current bottleneck on newPath plus calculated bottleneck lower than the total bottleneck on currPath? • 4. 1 No, go to 3 on previous slide • 4.2 Yes, • 4.2.1 Add edges of newPath • 4.2.2 Remove edges that are not used in other flows that don’t contain first node of newPath • 4.2.3 go to 3 on previous slide

  10. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Load Balancing Algorithm - example 3 0 1 2 5 4 1: Change from 0 1 2 4 to 0 5 4 1: Change from 0 1 2 3 to 0 5 3 1: Change from 1 2 4 to 1 4 1: Change from 1 2 3 to 1 3 1: Change from 5 1 2 4 to 5 4 1: Change from 5 1 2 3 to 5 3 2: Change from 0 5 4 to 0 4 2: Change from 0 5 3 to 0 3

  11. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Flow: 0->4, QS=4, ST=0.5

  12. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Flow: 5->3, QS=60, ST=5

  13. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Complicated Simulation

  14. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Flow: 0->3, QS=4, ST=0.5

  15. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Flow 1->2, QS=4, ST=0.5

  16. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Conclusions • Load balancing algorithm increases the network performance in networks with relatively rare number of flows and in networks with limitation in queue size and service tempo . • Load balancing algorithm increases the performance in part of flows in complicated networks that have a big number of flows and common links for different flows. This algorithm decreases a performance for other flows in complicated networks. • Networks that not suffers from the resources lack will not benefit from this algorithm in aspect of packet loss rate but in aspect of flow capacity and transfer rate. • The congestion control in wired network is possible through wireless network . Moreover it can be done by independent network like WSN by using special algorithms and protocols.

  17. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Further Development • How Load Balancing Algorithm will influence the other Internet Protocols, like UDP, BGP? • How can we improve this algorithm by exchanging updated information between network stations during iteration? • How can we manage the information data structures in more effective way? • How can this model to be involved by industry?

  18. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Questions ?

  19. Networked Software Systems LaboratoryDepartment ofElectrical EngineeringTechnion Thank You ! Link to the project website: http://softlab.technion.ac.il

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