Standardized Bundle Agent Discovery on Delay/Disruption-Tolerant Networks
Though copious networking research focuses on the terrestrial Internet, much of that research is not immediately applicable to devices in more "challenged" environments, such as deep-space probes and remote sensor networks. The communication channels between these devices may have any combination of extremely long round-trip times (on the order of seconds, minutes, or hours), low and unpredictable connectivity, asymmetric or unidirectional bandwidth, and a lack of an end-to-end path. To overcome these limitations, RFC5050 defines an overlay network, over which link-agnostic "bundles" are cached and transmitted by Bundle Agents (BAs) at key points in the network, much like e-mail messages.
One key limitation of this mechanism is the lack of a discovery mechanism for "adjacent" BAs. To date, all inter-BA communication channels were either manually configured, or a one-off dynamic mechanism was created which was neither robust, portable, nor secure. This document defines a dynamic system, somewhat similar to both DHCP and IPv6 neighbor discovery, which is a combination of flexibility for diverse domains and generality for interoperability. Through demonstration and analysis, its effectiveness in implementation is also shown, as well as its relationship to BA routing. A discussion of relevant security issues and suggested mitigations is also presented.
School Location:USA - Ohio
Source Type:Master's Thesis
Keywords:dtn bundling disruption networking delay bundles overlay network dtn2 discovery autodiscovery
Date of Publication:01/01/2008