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ATM-based routing in LEO/MEO satellite networks with intersatellite links

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5 Author(s)
Werner, M. ; Inst. for Commun. Technol., German Aerosp. Res. Establ., Wessling, Germany ; Delucchi, C. ; Vogel, H.-J. ; Maral, G.
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An asynchronous transfer mode (ATM)-based concept for the routing of information in a low Earth orbit/medium Earth orbit (LEO/MEO) satellite system including intersatellite links (ISLs) is proposed. Specific emphasis is laid on the design of an ATM-based routing scheme for the ISL part of the system. The approach is to prepare a virtual topology by means of virtual path connections (VPCs) connecting all pairs of end nodes in the ISL subnetwork for a complete period in advance, similar to implementing a set of (time dependent) routing tables. The search for available end-to-end routes within the ISL network is based on a modified Dijkstra (1959) shortest path algorithm (M-DSPA) capable of coping with the time-variant topology. With respect to the deterministic time variance of the considered ISL topologies, an analysis of optimization aspects for the selection of a path at call setup time is presented. The performance of the path search in combination with a specific optimization procedure is-by means of extensive simulations-evaluated for example LEO and MEO ISL topologies, respectively

Published in:

Selected Areas in Communications, IEEE Journal on  (Volume:15 ,  Issue: 1 )

Date of Publication:

Jan 1997

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