High-speed Access Technologies Research Articles

An Analysis of Influence of Network Topology on Power Network Reliability Based on OPLC

Optical fiber to the home (PFTTH) is an access network technology, which uses optical fiber composite low voltage cable (OPLC) to realize the deep integration of the power grid and communication network infrastructure. Key technologies include network structure design and high-speed access technology, PON technology, and the OPLC technology. This paper introduces the key technologies of power fiber-to-home networking and the influence of network topology on the reliability of PFTTH.

Optimal volume anomaly detection and isolation in large-scale IP networks using coarse-grained measurements

Recent studies from major network technology vendors forecast the advent of the Exabyte era, a massive increase in network traffic driven by high-definition video and high-speed access technology penetration. One of the most formidable difficulties that this forthcoming scenario poses for the Internet is congestion problems due to traffic volume anomalies at the core network. In the light of this challenging near future, we develop in this work different network-wide anomaly detection and isolation algorithms to deal with volume anomalies in large-scale network traffic flows, using coarse-grained measurements as a practical constraint. These algorithms present well-established optimality properties in terms of false alarm and miss detection rate, or in terms of detection/isolation delay and false detection/isolation rate, a feature absent in previous works. This represents a paramount advantage with respect to current in-house methods, as it allows to generalize results independently of particular evaluations. The detection and isolation algorithms are based on a novel linear, parsimonious, and non-data-driven spatial model for a large-scale network traffic matrix. This model allows detecting and isolating anomalies in the Origin-Destination traffic flows from aggregated measurements, reducing the overhead and avoiding the challenges of direct flow measurement. Our proposals are analyzed and validated using real traffic and network topologies from three different large-scale IP backbone networks.

Decision support models for the selection of internet access technologies in rural communities

Recent developments in Internet technologies have resulted in a wide range of high-speed internet choices to rural communities. In this paper, we present decision support models to select the high-speed access technologies with different characteristics under a multiple number of performance criteria (cost quality and speed). Specifically, we first construct an analytic hierarchy process (AHP) model, which provides the overall priority weights for each access technology under the multiple criteria. Next, we examine the cases of communities pooling their budget resources for additional mutual benefit. This examination leads to a couple of mixed integer programming models to determine the optimal technology selections of the pooled communities, taking the economies of scale, homogeneity/heterogeneity of communities into consideration. Throughout this paper, the main features are illustrated via numerical examples.

Emerging market structures in the digital supply chain

The supply chain for distributing digital goods via the Internet is in the process of spasmodic change. A wide array of new, high-speed access technologies are transforming the last mile, eroding the market power of established access providers, making smaller companies disappear overnight, and generating huge alliances. Customers face a rich set of options in access and content. The many access options and speeds have been accompanied by increasingly innovative digital products and services, most of them personalized. Wireless is maturing as a medium for data distribution with exciting new applications. While most observers recognize that the industries of content and access provision are in flux, it is unclear which business models may survive. The savvy organization (and individual) need to correctly interpret the implications of the dazzling developments in technology to effectively position themselves in the market. The authors characterize scenarios that are likely to occur based on the premise that you can't think of content and access provision as separate markets. Value-added bundles of dynamically customized content will be the order of the day. Will you and your organization be ready for the change?.

Emerging high-speed access technologies

Networks are fast becoming the backbone of many businesses, but the technology behind them is probably the most complex and least understood IT subject. It's not enough to have a particular network in place-you must also keep data flowing from site to site and to and from the Internet at adequate speed. This is where the choice of access technologies-the various ways your enterprise can connect to larger networks-is crucial. Your choices have never been more diverse. After years of talk about how to upgrade the "last mile" (the connection from your location to a hub or central office), vendors now have products to offer. Some are relatively immature, having only recently become commercially available. Regardless, they can make an immediate difference in throughput. To benefit, you'll need to navigate some complex vendor options and keep an eye on future developments in technology and standards. To help guide your decision making, the authors present a brief overview of new network access technologies. Be aware that deployment depends on location and market: some of these technologies may be available in your area, others may not. The following are mentioned: phone line access; digital subscriber lines; cable modems; and direct broadcast satellites.