Managing Routing Scalability in Space DTNs

RAVERTA, FERNANDO; FRAIRE, JUAN A.; BURLEIGH, S.; MADOERY, PABLO G.; FINOCHIETTO, JORGE M.

Huntsville

Conferencia; 2018 6th IEEE International Conference on Wireless for Space and Extreme Environments (WiSEE); 2018

Space networks, comprised of satellites, deep-spaceproves as well as the corresponding ground segment usuallyrely on scheduled contact plans, which are exploited by Delay-Tolerant Networks (DTN) routing algorithms to optimize datadelivery. However, as space networks grow in size, the processof obtaining routes and forwarding traffic becomes both com-putationally expensive and challenging, thus limiting the overallscalability of the system. This problem becomes critical whenrouting is executed in resource-constrained on-board computers.While most of previous works have focused on optimizing datadelivery performance, we propose two mechanisms to improvethe computation effort and scalability of the routing procedureat the expense of an acceptable decrease in performance. Resultsfrom simulations of realistic satellite networks provide evidenceson the trade-off in different cases.