Navy

Application-aware automatic network selection router

Routing designed to mitigate the effects of disruptions in connectivity that would terminate conventional IP connections

Communications Software & Information Technology

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When communication devices, such as an antenna on a jet (702) are within line-of-sight of a ground station antenna (708) having ANS gateway router (602), conventional IP routing is used to forward packets, over IP network (714). However, if the connection to the ground station is temporarily lost, such as with the antenna on a jet (704), ANS gateway router will automatically buffer packets, as well as search for multi-hop alternatives to the direct ground station connection.

Networks which are prone to experience disruptions are commonly referred to as challenged networks. The standard suite of Internet protocols (IP) assumes that a stable end-to-end path exists, that the maximum round trip time is not excessive, and that the packet drop probability is small. Networks that do not have these properties can be generally categorized as highly-mobile networks, exotic media networks (satellite communications, deep space radio frequency (RF) links, acoustic modulation (used underwater) and line-of-sight high-frequency radio or optical links), military ad hoc networks and sensor networks. They are characterized by frequent route changes, outages, high round-trip times, and vulnerability to jamming and eavesdropping.

A wide range of networking approaches has been developed to address problems with challenged networks, from modifying traditional IP-based protocols to be more tolerant of disruption and delay, to new architectures (non-native IP) that operate as application overlays. Developing non-IP protocols is a long-term approach to the problem that has benefits in reducing overhead associated with IP, as well as improving cross-layer information sharing. The downside is that retrofitting a network designed around IP-based protocols to use another network layer is difficult and costly.

To address the above, Navy scientists have developed a solution which integrates multiple networks in a seamless, application-aware fashion. In this approach, IP networks are combined with disruption tolerant networks (DTNs) in a single device – the Application-aware Automatic Network Selection (ANS) gateway router. The ANS router permits an increase the utility of both types of networks and improves the performance of data delivery. The single device ANS router incorporates state-of-the-art IP and DTN routing technologies, both of which are configured automatically by an ANS gateway. The ANS router performs: monitoring the state of IP network connectivity; context-aware selection of the better network (IP or DTN) to deliver data; automated configuration and control of IP routing behavior; self-discovery of peer gateways connected to a DTN network; translation of IP packets to DTN bundle payloads; translation of DTN bundle payloads to IP packets; manipulation of application connections to prevent timeouts; and, informing applications directly of current network conditions.

Prenegotiated License Terms

Non-Exclusive
Partially Exclusive
Exclusive
License Execution Fee
$2,000
$3,000
$4,000
Royalty on Net Sales
2%
3%
4%
Minimum Annual Royalty
$1,000
$1,500
$2,500
Annual Patent Fee
$1,000
$1,500
$1,500
Sublicensing
No
Yes
Yes
Sublicensing Royalty on Net Sales
N/A
3%
4%
Sublicensing Royalty on Other Income
N/A
50%
50%

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