This is an overview of the ongoing FAST Copper project, which is aimed at substantial improvements in rate, reach, reliability, and quality in copper-last-mile broadband access through fiber/DSL deployment, engineering innovations, and fundamental research. The project is funded by NSF, and is currently pursued jointly by Princeton University, Stanford University, and Fraser Research Lab. In th...

Many dial-in hosts which support multi-link PPP dial the same phone number for all links. This implies that there exists a rotary at the Point Of Presence (POP) which routes incoming calls to a bank of modems. These may be physically independent modems connected to Remote Access Server (RAS) and a rotary of analog phone lines, or a RAS with internal modems connected to analog lines or a T1/E1 o...

High-Speed Downlink Packet Access (HSDPA) is being introduced by mobile operators as a solution both for increasing the downlink throughput and for achieving a more efficient usage of the radio resources. This work analyses the quality of experience of HSDPA users, based on experiments and measurements over a commercial network. The effect of multiple users sharing the overall capacity of the c...

Power line communication (PLC) has become an important network access technology to conveniently and effectively provide various useful services such as remote meter reading, broadband Internet access, and home networking services. As the deployment and use of PLC networks increase, it is essential that we need to be able to configure, monitor, and control the PLC network resources. In this pap...

The number of households and businesses using HFC cable networks for Internet access is rapidly approaching 40 million in the United States. The cable industry has standardized on a single MAC and physical layer standard, the Data Over Cable System Interface Specification (DOCSIS). The emerging IEEE 802.16 broadband wireless access MAC protocol is based on DOCSIS. We have implemented a simulati...

This document describes a set of Layer 2 Tunneling Protocol (L2TP) Attribute Value Pair (AVP) extensions designed to carry the subscriber Access Line identification and characterization information that arrives at the Broadband Remote Access Server (BRAS) with L2TP Access Concentrator (LAC) functionality. It also describes a mechanism to report connection speed changes, after the initial connec...

This is an overview of the ongoing FAST Copper project, which aims at at substantial improvements in rate, reach, reliability, and quality in copper-last-mile broadband access through fiber/DSL deployment, engineering innovations, and fundamental research. The project is funded by NSF, and is currently pursued jointly by Princeton University, Stanford University, and Fraser Research Lab. In thi...

A recommender system in an e-learning context is a software agent that tries to ”intelligently” recommend actions to a learner based on the actions of previous learners. This recommendation could be an on-line activity such as doing an exercise, reading posted messages on a conferencing system, or running an on-line simulation, or could be simply a web resource. These recommendation systems hav...

With the appearance of Peer-to-Peer information systems the interest in scalable and decentralized data access structures is attracting increasingly interest. We propose to that end P-Grid, a scalable data access structure resulting from the distribution of a binary pre x tree. When adapting the P-Grid structure to skewed data distributions one obtains unbalanced search trees. The key result of...

Access control plays an important part in IT systems these days. Specifically Role-Based Access Control (RBAC) has been widely adopted in practice. One of the major challenges within the introduction of RBAC into an organization is the policy definition. Modeling technologies provide support by allowing to design and to validate a policy. In this work we apply a UML and OCL based domain-specifi...