Lin Cai, NJIT

Date: May 15th, 2009 (Friday)
Time: 3:00pm – 4:00pm
Place: 202 ECEC

Abstract:

A Load-Balanced Combined Input-Crosspoint Buffered (LB-CICB) packet switch was introduced to provide high switching performance and avoid crosspoint buffer underflow. In a LB-CICB switch, inputs have flexible access to all crosspoint buffers rather than fixed access to crosspoint buffers by a single flow as for CICB switches. This access in a highly distributed switch provides a natural fault tolerant capability. In a fault-tolerant load-balanced CICB switch, the crosspoint may fail and the other crosspoints may be able to restitute switching functionality. In high-speed packet switches, system reliability is critical to avoid packet loss and retransmission of packets which increases the network traffic and wastes network resources. Once a fault occurs, the switch should recover rapidly by using redundant resources. Our proposed schemes store copies of the original cells to in available crosspoint buffers and ensure recoverability of the switch without additional hardware. The proposed schemes reduce the amount of packet loss efficiently. We also prove the effectiveness of the system through mathematical analysis under different crosspoint buffer failure probabilities.

Another reason why networking systems malfunction is because attacks on network service or infrastructure. In the second part of this proposal, we consider the distributed network security in Peer-to-Peer (P2P) networks. P2P networking is a major resource for users with similar interests to exchange, contribute, or obtain files. This network model has been proven popular to exchange music, pictures, or software applications that are saved, and most likely executed at the downloading host. At the expense of this mechanism, worms, viruses and intruding files find an open front door to the downloading host and giving them place to a very convenient environment for successful proliferation throughout the network. Although virus detection software is currently available, this countermeasure works in a reactive approach and most times isolated manner.  Trust management is a promising strategy to bound the proliferation of malware on peer-to-peer networks that can work jointly with virus detection systems. We consider a trust management scheme to contain the proliferation of viruses in P2P networks. By using computer simulation of a mesh peer-o-peer network we have show the improvement of this proposed approach. Furthermore, considering that trust parameters to bound proliferation have the potential of discouraging download activity in P2P networks, we studied the impact of using our proposed scheme. We show that our approach doesn't inhibit the download activity of the network.

Committee Members:

Dr. Roberto Rojas-Cessa, Dissertation Advisor, Associate Professor, ECE Dept, NJIT
Dr. Nirwan Ansari, Professor, ECE Dept, NJIT
Dr. Sotirios G. Ziavras, Professor, ECE Dept, NJIT
Dr. Yanchao Zhang, Assistant Professor, ECE Dept, NJIT
Dr. Guiling Wang, Assistant Professor, CS Dept, NJIT

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Note: All ECE MS thesis defense and Ph.D. dissertation (proposal) defense are counted towards ECE791.