Recently in the Networks Category

NASA Leads Federal Government In World IPv6 Launch

"NASA is the first U.S. federal agency to participate in the World IPv6 Launch. Internet Protocol version 6 (IPv6) will replace IPv4 as the communication protocol used to direct most of the traffic on the Internet. IPv6 will enable an increase in the number of IP addresses, support more devices and users and improve the efficiency of traffic routing the traffic on the Internet. Organized by the Internet Society of Reston, Va., World IPv6 Launch on June 6, 2012 is intended to motivate organizations across the industry - including Internet service providers (ISPs), hardware makers, and web companies - to prepare for and permanently enable IPv6 on their products and services as IPv4 address space runs out."

Wiring An Ocean Planet

Undersea Cable Could Revolutionize Oceanography - Experts say Ocean observatory will be transformative, VOA

"This past April, there was a big volcanic eruption in America’s Pacific Northwest. If you missed it, you're not alone. It happened under the ocean off the northern Oregon coast. Since then, several research ships have sent unmanned submersibles down into the undersea crater to videotape lava flows and spewing vents. In a few years, you should be able to watch such events live on the Internet 24/7. Thanks to a new underwater fiber optic cable, a new worldwide ocean observatory now under construction that could revolutionize our understanding of the deep sea environment."

Think about this: Imagine a similar network on the Moon or Mars - or a world with subsurface oceans such as Enceladus, Europa, or maybe Ceres - a network that uses in situ resources (Silicon, etc.) to manufacture the fiber optic cable. Imagine if NASA took data coming in from all of its missions, skipped the bad habit of compartmentalization, and put it all online - in one place - for all to see - and use.

To support upcoming robotic and human exploration needs, the National Aeronautics and Space Administration (NASA) anticipates that it and others will need to implement a unified architecture for internetworked communication and navigation services that span the solar system. Unlike the terrestrial internet, a future Solar System Internet (SSI) must be capable of accommodating intermittent connectivity, long or variable delays, asymmetric data rates, and high data loss rates. The underlying capability that enables the SSI is commonly referred to as "Disruption-Tolerant Networking" (DTN). The SSI will employ both opportunistic and scheduled communications paths to optimize routing among nodes of the SSI, while maintaining low communications overhead and data processing load.


AO Number (Required in subject line of email application): 823. Desired Number of Participants: 1 Background Information: The Deep Space Network (DSN) is composed of three spacecraft tracking centers in California, Spain and Australia. Each center tracks spacecraft up to the far reaches of space 24 hours/7-days/week and is manned by human operations. Some of the protocols and operations concepts are shared by other space agencies. The Consultative Committee for Space Data Systems (CCSDS) promotes the use of shared approaches and protocols to enable spacecraft operations support across agencies from multiple countries.

"The Saratoga transfer protocol was developed by Surrey Satellite Technology Ltd (SSTL) for its Disaster Monitoring Constellation (DMC) satellites. In over seven years of operation, Saratoga has provided efficient delivery of remote-sensing Earth observation imagery, across private wireless links, from these seven low-orbit satellites to ground stations, using the Internet Protocol (IP). Saratoga is designed to cope with high bandwidth-delay products, constrained acknowledgement channels, and high loss while streaming or delivering extremely large files. An implementation of this protocol has now been developed at the Australian Commonwealth Scientific and Industrial Research Organisation (CSIRO) for wider use and testing. This is intended to prototype delivery of data across dedicated astronomy radio telescope networks on the ground, where networked sensors in Very Long Baseline Interferometer (VLBI) instruments generate large amounts of data for processing and can send that data across private IP- and Ethernet-based links at very high rates. We describe this new Saratoga implementation, its features and focus on high throughput and link utilization, and lessons learned in developing this protocol for sensor-network applications." More