Charles R. Kalmanek

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Future high-speed networks are expected to carry traffic with a wide range of performance requirements. We describe two queue service disciplines, rate-based scheduling and hierarchical round robin scheduling, that allow some connections to receive guaranteed rate and jitter performance, while others receive best effort service. Rate-based scheduling is(More)
Packet telephony is of increasing interest in both the telecommunications and Internet communities. The emergence of packet telephony will create new services, and presents an opportunity to rethink how conventional telephony services are implemented. In this paper, we present an architecture for Te-lephony Over Packet networkS (TOPS). TOPS allows users to(More)
Understanding the variability of Internet traffic in backbone networks is essential to better plan and manage existing networks, as well as to design next generation networks. However, most traffic analyses that might be used to approach this problem are based on detailed packet or flow level measurements, which are usually not available throughout a large(More)
Prism's content naming, management, discovery, and redirection mechanisms support high-quality streaming media services in an IP-based content distribution network. W ith the emergence of broad-band access networks and powerful personal computer systems, the demand for network-delivered full-motion streaming video is growing. While the traditional Web(More)
The application of an IP-based control plane to optical networks has opened up new opportunities and challenges for network designers. Although much work has been done on standardization of protocols for IP networks, the applicability of these protocols to controlling optical networks and the overall reliability of optical networks needs further(More)
In MPLS/GMPLS networks, a range of restoration schemes will be required to support different tradeoffs between service interruption time and network resource utilization. In light of these tradeoffs, path-based end-to-end shared mesh restoration provides a very attractive solution. However, efficient use of bandwidth for shared mesh restoration strongly(More)
a failed link (case1), or a new link added between two ports for network growth (case2). In case 1, PBS finds the VPIs, , that were inacti-vated by the selective freeze procedure when the link failure occurred. For each VPI in the set PBS performs a selective-unfreeze to the nodes downstream from itself in order to restore these VPIs back to their active(More)