651 research outputs found
The Internet's unexploited path diversity
The connectivity of the Internet at the Autonomous System level is influenced
by the network operator policies implemented. These in turn impose a direction
to the announcement of address advertisements and, consequently, to the paths
that can be used to reach back such destinations. We propose to use directed
graphs to properly represent how destinations propagate through the Internet
and the number of arc-disjoint paths to quantify this network's path diversity.
Moreover, in order to understand the effects that policies have on the
connectivity of the Internet, numerical analyses of the resulting directed
graphs were conducted. Results demonstrate that, even after policies have been
applied, there is still path diversity which the Border Gateway Protocol cannot
currently exploit.Comment: Submitted to IEEE Communications Letter
The use of maxLength in the RPKI
This document recommends that operators avoid using the maxLength attribute when issuing Route Origin Authorizations (ROAs) in the Resource Public Key Infrastructure (RPKI). These recommendations complement those in [RFC7115].https://datatracker.ietf.org/doc/draft-yossigi-rpkimaxlen/First author draf
Commensal observing with the Allen Telescope array: software command and control
The Allen Telescope Array (ATA) is a Large-Number-Small-Diameter radio
telescope array currently with 42 individual antennas and 5 independent
back-end science systems (2 imaging FX correlators and 3 time domain beam
formers) located at the Hat Creek Radio Observatory (HCRO). The goal of the ATA
is to run multiple back-ends simultaneously, supporting multiple science
projects commensally. The primary software control systems are based on a
combination of Java, JRuby and Ruby on Rails. The primary control API is
simplified to provide easy integration with new back-end systems while the
lower layers of the software stack are handled by a master observing system.
Scheduling observations for the ATA is based on finding a union between the
science needs of multiple projects and automatically determining an efficient
path to operating the various sub-components to meet those needs. When
completed, the ATA is expected to be a world-class radio telescope, combining
dedicated SETI projects with numerous radio astronomy science projects.Comment: SPIE Conference Proceedings, Software and Cyberinfrastructure for
Astronomy, Nicole M. Radziwill; Alan Bridger, Editors, 77400Z, Vol 774
P2P Based Architecture for Global Home Agent Dynamic Discovery in IP Mobility
Mobility in packet networks has become a critical issue in the last years. Mobile IP and the Network Mobility Basic Support Protocol are the IETF proposals to provide mobility. However, both of them introduce performance limitations, due to the presence of an entity (Home Agent) in the communication path. Those problems have been tried to be solved in different ways. A family of solutions has been proposed in order to mitigate those problems by allowing mobile devices to use several geographically distributed Home Agents (thus making shorter
the communication path). These techniques require a method to discover a close Home Agent, among those geographically distributed, to the mobile device. This paper proposes a peer-topeer based solution, called Peer-to-Peer Home Agent Network, in
order to discover a close Home Agent. The proposed solution is simple, fully global, dynamic and it can be developed in IPv4
and IPv6.No publicad
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