Detecting network path anomalies generally requires examining large volumes of traffic data to find misbehavior. We observe that wide-area services, such as peerto-peer systems and content distribution networks, exhibit large traffic volumes, spread over large numbers of geographically-dispersed endpoints. This makes them ideal candidates for observing wide-area network behavior. Specifically, ...

The increasing demand of load without considerable increase in transmission resources has posed numerous constraints and challenges in the power system monitoring and performance. The inadequacy in transmission resources has resulted in reduced operational margins for many power systems worldwide and has led to operation of power systems closer to their stability limits and to power exchange in...

When we speak of on-line distribution we must first make clear a distinction between on-demand and programmed streaming of contents: in the first case the audience can choose what to play at any time on each screen, while in the second case the broadcaster decides the sequence of videos streamed on all audience screens. The choice among these two distribution schemes is purely functional to the...

environment, but there are also challenges associated with Abstract predicting the effectiveness of these munitions for a wide range of mission scenarios. The single shot Pk numbers The problem of estimating effectiveness of associated with most direct attack munitions are not directly autonomous wide area search munitions will be considered, applicable to wide area search munitions because the...

IP multicast is gaining acceptance among service providers as the protocols and infrastructure mature. Yet characteristics of multicast traffic remain poorly understood. Using passive OC-12 monitors we observe multicast traffic on links connecting aggregated customers and peer networks to our native multicast backbone network. We first refine existing traffic flow profiling methodologies via an...

I suggest R&D directions for wide-area angle and voltage stability controls in large power systems. Existing wide-area stability controls are mostly event-driven discontinuous actions, and are termed special protection systems or remedial action schemes. More sophisticated controls act on the measured response (swing) of electrical variables to disturbances. I describe applications of response-...

In distributed applications, a group of multiple processes is required to be cooperated by exchanging multimedia data. In addition, world-wide distributed applications are being realized by using the Internet. The traditional group communication protocols assume that every pair of processes support almost the same and fixed delay time and reliability level. In world-wide multimedia applications...

This paper addresses the problem of enabling a group of autonomous vehicles to effectively patrol an environment significantly larger than their communication and sensing radii. The environment is divided into smaller areas and special coordinator vehicles are designated to control the transfer of the other vehicles from one area to another. Our past work showed that by organizing the areas and...

Interdomain multicast routing is a challenge, requiring a scalable solution that is suitable for diverse application characteristics. Center-based routing trees overcome some of the limitations associated with traditional shortest-path tree routing, however they present a new set of routing problems. Speciically, the choice of the center router can be critical in determining the multicast routi...

Many distributed services would benefit from control over the flow of traffic to and from their users, to offer better performance and higher reliability at a reasonable cost. Unfortunately, although today’s cloud-computing platforms offer elastic computing and bandwidth resources, they do not give services control over wide-area routing. We propose replacing the data center’s border router wit...