Authors: Arjan Durresi
Addresses: Department of Computer and Information Science, Indiana University Purdue University, Indianapolis, IN 46202 USA
Abstract: In this paper, we present a constraint-based routing strategy for real-time traffic over a multilayered hierarchical satellite architecture. Both quality (Bit-Error Rate BER) on free-space optical and radio Inter-Satellite Links (ISLs) and bandwidth availability on satellite links are taken into account when setting up routes for high-priority for real-time traffic such as Voice over IP (VoIP). We propose to have a separate queue for real-time traffic to protect it from being swamped by bursty best-effort traffic. Packets from several real-time flows are aggregated onto the same Label Switched Path (LSP) based on destination and priority, and are shielded from each other by a proportional dropping policy, where packets from flows exceeding their Committed Information Rate (CIR) have high dropping probability during congestion. The performance of our prioritised load balancing routing algorithm on a multilayered satellite network is simulated and analysed.
Keywords: multilayered satellite architecture; real-time traffic routing; satellite networks; constraint-based routing; prioritised load balancing; simulation.
International Journal of Wireless and Mobile Computing, 2008 Vol.3 No.1/2, pp.22 - 34
Published online: 25 Jul 2008 *Full-text access for editors Access for subscribers Purchase this article Comment on this article