Network capacity estimation method for satellite network system

Abstract

The invention discloses a network capacity estimation method for a satellite network system, and the method comprises the steps: building a satellite network topological structure model according to satellite constellation configuration parameters; dividing the operation period of the satellite network into a plurality of time slots according to the link connection characteristics of the satellitenetwork and the satellite motion law, so that the topological connectivity of the satellite network in one time slot is kept unchanged; in each time slot, based on a satellite network topology structure, calculating the network capacity of each time slot by solving the network maximum flow problem according to an inter-satellite link establishment mode, the link capacity of a satellite and a ground station, the link capacity of the satellite and a user and the service volume requirement of the user; and calculating the average network capacity according to the network capacity of each time slot. According to the invention, the calculation consumption and the requirement for a simulation platform during network capacity estimation can be reduced, the influence of satellite-ground connection constraints, link topology dynamic changes, link capacity constraints and ground traffic distribution can be considered, and the effectiveness and credibility of an estimation result are ensured.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to a method for estimating network capacity of a satellite network system. Background technique [0002] Since satellites can provide network services to users in any region of the world without being restricted by terrain and geographical conditions, research on satellite-based spatial information networks has become a research hotspot in the field of satellite communications. With the support of modern information technology, network communication technology, and control technology, satellites of different orbits, types, and functions can realize data transmission relay and information interconnection through the establishment of inter-satellite / satellite links and network connections, and can form a network that can A space-ground integrated information network system that meets global-omnidirectional-full-time requirements. [0003] When designing the satellite ...

AI Technical Summary

Problems solved by technology

[0004] However, the simulation setting of the network simulation method based on discrete event processing data packet flow is complicated, the calculation amount is large, and the time-consuming is long, and the calculation cost increases rapidly with the increase of the number of nodes in the network system, and it is difficult to realize the simulation requirements of the giant satellite constellation network system

The estimation method based on simple superposition does not consider the node connectivity constraints in the satellite network system, the service demand distribution of ground users, the inter-satellite link capacity and the congestion problem, and the obtained network capacity estimation result is only the capacity under the optimal situation, and the engineering guidance is poor.

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