Information about the research activities of networks lab

Malware Propagation in Networks of Smart Cell Phones with Spatial Dynamics

Submitted by networks on Tue, 03/20/2007 - 10:29.

Authors:

K. Ramachandran; B. Sikdar

Source:

Proceedings of IEEE INFOCOM minisymposium, Alaska, AK (2007)

Real Time Detection of Link Failures in Inter Domain Routing

Submitted by networks on Tue, 03/20/2007 - 10:27.

Authors:

X. Long; B. Sikdar

Source:

Proceedings of IEEE ICC, Glasgow, Scotland (2007)

Performance Analysis of Polling based TDMA MAC Protocols with Sleep and Wakeup Cycles

Submitted by networks on Tue, 03/20/2007 - 10:26.

Authors:

H. Yang; B. Sikdar

Source:

Proceedings of IEEE ICC, Glasgow, Scotland (2007)

On the Stability of the Malware Free Equilibrium in Cell Phones Networks with Spatial Dynamics

Submitted by networks on Tue, 03/20/2007 - 10:23.

Authors:

K. Ramachandran; B. Sikdar

Source:

Proceedings of IEEE ICC, Glasgow, Scotland (2007)

Asynchronous Cooperative MIMO Communication

Submitted by networks on Tue, 03/13/2007 - 10:35.

Authors:

Hsin-Yi Shen, Shivkumar Kalyanaraman

Source:

In Proceedings of 5th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks (WIOPT), Limassol, Cyprus (2007)

URL:

http://www.ecse.rpi.edu/Homepages/shivkuma/research/papers/WiOPT07_hsinyi.pdf

Abstract:

We consider a cluster-based cooperative transmission scheme where the source node and destination node form clusters for transmission. Instead of using perfect synchronization technique, we assume the cooperative transmission is asynchronous. Each member in transmitting cluster relays signal to the receiving cluster after obtaining information from source node. A general decision feedback equalizer (DFE) is used in the receiving cluster members to equalize the received MISO signal and detect as soft symbols. The receiving cluster members send the softdecision outputs to the destination node. Thus, the decision node combines the soft-decision outputs and makes hard-decision detection for the transmitted information. The performance of proposed system is shown and compared with conventional MIMO system. Major factors for system performance is discussed. The over-sampling rate plays an important role in system performance. We also present a simple capacity analysis for proposed cooperative transmission system. The capacity ratio between cooperative MIMO system and direct transmission (SISO) system is also presented and compared to the capacity ratio of conventional MIMO system and direct transmission (SISO) system. We also extend the analysis to heterogeneous network and show the capacity ratio.
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Stochastic event capture using mobile sensors subject to a quality metric

Submitted by networks on Thu, 03/08/2007 - 14:52.

Authors:

Nabhendra Bisnik; Alhussein A. Abouzeid; Volkan Isler

Source:

12th Annual International Conference on MobileComputing and Networking (MOBICOM’06), Los Angeles, California (2006)

Keywords:

Mobile sensors, robotics, event capture, path-planning algorithms

Abstract:


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Rate-distortion bounds on location-based routing protocol overheads in mobile ad hoc networks

Submitted by networks on Thu, 03/08/2007 - 14:50.

Authors:

Nabhendra Bisnik; Alhussein A. Abouzeid

Source:

44th Allerton Conference on Communication, Control, and Computing (Allerton’06) (2006)

Keywords:

Information theory, geographic routing, routing overheads, mobile ad hoc networks, scalable protocols, capacity deficit

Capacity deficit in mobile wireless ad hoc networks due to geographic routing overheads

Submitted by networks on Thu, 03/08/2007 - 14:48.

Authors:

Nabhendra Bisnik; Alhussein A. Abouzeid

Source:

26th IEEE Conference on Computer Communication (INFOCOM’07), IEEE, Anchorage, Alaska (2007)

Keywords:

Information theory, geographic routing, routing overheads, mobile ad hoc networks, scalable protocols, capacity deficit

Optimizing random walk search algorithms in P2P networks

Submitted by networks on Thu, 03/08/2007 - 14:46.

Authors:

Nabhendra Bisnik; Alhussein A. Abouzeid

Source:

Computer Networks (2006)

Keywords:

Unstructured P2P networks, random walk, performance analysis

Disruption-Tolerant Link-level Mechanisms for Extreme Wireless Network Environments

Submitted by networks on Tue, 03/06/2007 - 18:13.

Authors:

Vijaynarayanan Subramanian; K.K. Ramakrishnan; Shivkumar Kalyanaraman

Source:

THE SECOND IEEE/Create-Net/ICST International Conference on COMmunication System softWAre and MiddlewaRE (COMSWARE), Bangalore, India (2007)

URL:

http://poisson.ecse.rpi.edu/~vijay/web/work/comwsare.pdf

Abstract:

Wireless links pose significant challenges in terms of achievable goodput and residual loss-rate. Our recent enhancements, called LT-TCP make TCP loss-tolerant in heavy/bursty erasure environments. Link-level protocols mitigate these problems by using a combination of FEC and ARQ but are insufficient when the channel experiences disruptions. When the underlying source of loss is interference (e.g., 802.11 environments), {\sc mac}-level mechanisms misinterpret interference as noise leading to poor scheduling (e.g., capture effects) and limit the benefit of transport layer mitigation efforts. We propose enhancements to link-level protocols that enable survival during disruptions. We explore an adaptive link-level strategy to export a small residual loss rate and bounded latency under high loss/ disruption conditions. We evaluate the proposed link-level enhancements, showing that the combination with LT-TCP helps achieve significant end-to-end performance gains. We also demonstrate the trade-off between reduced link layer residual loss (by increasing ARQ persistence) and transport layer timeouts.

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