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Thank you for your interest. Given below are links to some of my ongoing research projects. If you have any comments, please send me an email. Also see a list of representative publications. On Setting up a WiFi Ad Hoc Network TestbedWe implemented an eight-node ad hoc network using off-the-shelf WiFi routers
and publicly available software. The hardware cost of the network is about
$50/node. We reprogrammed these WiFi routers with the openwrt distribution of
Linux kernel and added AODV routing module to create an ad hoc network. To
gather data from wireless experiments without perturbing wireless
communications, we set up a second network based on the fast Ethernet. The
Ethernet is used to start and stop experiments, monitor individual node
status, and send experimental data to a chosen desktop computer for analysis and
processing. We modified AODV software and developed C programs to WDS protocol at the MAC level can also be set up on this cluster. [Link to WDS Setup]. Mitigating Denial of Service Attack on Ad Hoc NetworksWe investigated the impact of hacker attacks by malicious nodes on the overall network performance. These malicious nodes mimic normal nodes in all aspects except that they do route discoveries much more frequently than the other nodes. We proposed an adaptive statistical packet dropping mechanism to mitigate such situations and reduce the loss of throughput. The proposed mechanism works even when the identity of the malicious nodes is unknown and does not use any additional network bandwidth. It is simple to implement and maintains or improves network throughput when there are no malicious nodes but the network is congested with excess traffic. Previously, we evaluated the impact of such attacks and the effectiveness of our solution using simulations conducted with Glomosim simulator. In this project, we implemented the solution in Kernel AODV code for Linux machines and evaluated it on the ad hoc network testbed. [Details]
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Rajendra V. Boppana |