Link-identified Routing Architecture in Space
Hefan Zhang, Zhiyuan Wang, Shan Zhang, Qingkai Meng and, Hongbin Luo

TL;DR
This paper introduces a Link-identified Routing architecture for LEO satellite networks that uses in-packet bloom filters for efficient path encoding, addressing dynamic topology and handover challenges.
Contribution
It proposes a novel routing architecture leveraging link identification and bloom filters, with analytical models and schemes for dynamic topology management in LEO satellites.
Findings
Reduces forwarding overhead with optimal encoding policies.
Effectively manages link-state changes and handovers.
Verifies performance improvements through simulations.
Abstract
Low earth orbit (LEO) satellite networks have the potential to provide low-latency communication with global coverage. To unleash this potential, it is crucial to achieve efficient packet delivery. In this paper, we propose a Link-identified Routing (LiR) architecture for LEO satellite networks. The LiR architecture leverages the deterministic neighbor relation of LEO constellations, and identifies each inter-satellite link (ISL). Moreover, LiR architecture adopts source-route-style forwarding based on in-packet bloom filter (BF). Each satellite could efficiently encode multiple ISL identifiers via an in-packet BF to specify the end-to-end path for the packets. Due to false positives caused by BF, the more ISLs are encoded at a time, the more redundant forwarding cases emerge. Based on the topology characteristics, we derive the expected forwarding overhead in a closed-form and propose…
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