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.

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

Dynamic Routings in Satellite Networks: An Overview

Satellite systems are going to build a part of the future personal communications infrastructure. The first-generation candidates for satellite personal communication networks (S-PCN) will rely on low Earth orbit (LEO) and medium Earth orbit (MEO) constellations. A noticeable trend in this field is toward broadband services and the use of ATM. For LEO satellite systems employing intersatellite links (ISLs), this paper proposes an overall networking concept that introduces the strengths of ATM to their operation. The core of the paper is the design of a new routing scheme for the periodically time-variant ISL subnetwork, discrete-time dynamic virtual topology routing (DT-DVTR), and its ATM implementation. DT-DVTR works completely off line, i.e., prior to the operational phase of the system. In a first step, a virtual topology is set up for all successive time intervals of the system period, providing instantaneous sets of alternative paths between all source-destination node pairs. In the second step, path sequences over a series of time interval are chosen from that according to certain optimization procedures. An ATM-based implementation of DT-DVTR in LEO satellite ISL networks is presented with some emphasis on the optimization alternatives, and the performance in terms of delay jitter is evaluated for an example ISL topology.

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

Citations

Dynamic Routings in Satellite Networks: An Overview

References

A dynamic routing concept for ATM-based satellite personal communication networks

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