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In comparison to Random Overlay Networks, Semantic Overlay Networks are very efficient for category based content searches. However, problem arises when geographical locality is of interest in search ranking. We propose suitable measures to adapt SONs for spatial locality ranking of a search. We evolve GeoSONs that exploit the SON hierarchy in the search domain and are capable of different types of...
A recent approach-COPE, presented by Katti (Proc. ACM SIGCOMM 2006, pp. 243-254)-for improving the throughput of unicast traffic in wireless multihop networks exploits the broadcast nature of the wireless medium through opportunistic network coding. In this paper, we analyze throughput improvements obtained by COPE-type network coding in wireless networks from a theoretical perspective. We make two...
The studies in fault-tolerance in networks mostly focus on the connectivity of the graph as the metric of fault-tolerance. If the underlying graph is k-connected, it can tolerate up to k - 1 failures. In measuring the fault tolerance in terms of connectivity, no assumption regarding the locations of the faulty nodes are made - the failed nodes may be close to each other or far from each other. In...
Networking devices today consume a non-trivial amount of energy and it has been shown that this energy consumption is largely independent of the load through the devices. With a strong need to curtail the rising operational costs of IT infrastructure, there is a tremendous opportunity for introducing energy awareness in the design and operation of enterprise and data center networks. We focus on these...
Knowledge of the network path properties such as latency, hop count, loss and bandwidth is key to the performance of overlay networks, grids and P2P applications. Network operators also use these metrics for managing and diagnosing problems in their networks. However, the size of the Internet makes the task of measuring these metrics immensely difficult. A more scalable approach of inference and estimation...
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