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We consider the contract-switching paradigm for studying the inter-domain traffic engineering problem. In the contract-switching paradigm, each ISP in the Internet is abstracted as a set of edge-to-edge contract links. We formulate the optimal routing problem for the contract-switching paradigm by considering three objectives, namely: 1) maximizing throughput, 2) minimizing delay, and 3) minimizing...
We consider an Internet Service Provider’s (ISP’s) problem of providing end-to-end (e2e) services with bandwidth guarantees, using a path-vector based approach. In this approach, an ISP uses its edge-to-edge (g2g) single-domain contracts and vector of contracts purchased from neighboring ISPs as the building blocks to construct, or participate in constructing, an end-to-end “contract path”. We develop...
In this work, we study the inter-domain traffic engineering problem with the perspective of attaining socially optimal flows across the Internet. In accordance with the two-level (intra- and inter-AS) hierarchy that naturally exists in the Internet architecture, we use bi-level network flow decomposition to derive inter-domain traffic engineering solutions that do not require ISPs to reveal their...
We provide a formal model for the Change Management process for Enterprise IT systems, and develop change scheduling algorithms that seek to attain the "change capacity" of the system. The change management process handles critical updates in the system that often use overlapping sets of servers, resulting in scheduling conflicts between the corresponding change classes. Furthermore, applications...
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