The Satellite network is an important part of the global network. However, the complex architecture, changeable constellation topology, and frequent inter-satellite connection switching problems bring great challenges to the routing designs of satellite networks, making the study of the routing methods in satellite networks a research hotspot. Therefore, this paper investigates the latest existing routing works to tackle the dynamic routing problems in satellite networks. The architecture and development of satellite networks are presented and analyzed first. Afterward, dynamic routing problems in satellite networks are analyzed in detail based on the time-varying network topology. According to the latest works, the advanced satellite network routing schemes, including single-layer and multi-layer dynamic routing are introduced and analyzed. In addition, the merits, shortcomings, and applications of these schemes are analyzed and summarized. Finally, potential technologies and future directions are discussed.

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Dynamic Routings in Satellite Networks: An Overview

According to the typical constellation configuration, this paper analyzes the constellation network topology, and designs a routing protocol with convergence capabilities and a Media Access Control layer protocol which uses time division multiple access to allocate different time slots to control data flow. A routing mechanism with a virtual topology is established, and a static routing table is set according to the predictable characteristics of the orbit, which is suitable for the same orbit as well as for different orbits. This article uses OPNET simulation software to model the entire network system, simulate the multi-hop constellation network, and obtain and analyze the network's time delay, throughput and other indicators. The simulation results show that the routing protocol has a good performance in the constellation network.

Yuyue Yang

Papers

Design and Implementation of LEO Micro-Satellite Network Routing Protocol based on Virtual Topology