Routing And Wavelength Assignment Of Intergrated Satellite-Ground Optical Networks

Satellite and ground intergrated optical network combines satellite network and terrestrial network.Terrestrial network using optical fiber transmission services.Satellite network using a laser as a transmission medium.Between satellite and ground station through satellite and ground laser communication link, optical networking integration so that the star reaches the effect of global coverage.The satellite integration optical network with a high degree of interoperability information, and flexible features. In the integrated satellite and terrestrial optical network in, satellite network and ground network complement each other, when the available resources of the network on the ground, or due to failure to lead to the normal work. It can use satellite network as a supplement, to continue to provide service for the business.But satellite networks with limited resources and due to its dynamic characteristics, resulting in satellite link handover, easily lead to sudden interruption of the situation, which led to in the selection and try to choose the ground network, through the fusion of satellite to ground optical network will be greatly enhanced overall network resource utilization rate and survival ability.Satellite and ground intergrated optical network has attracted more and more attention in the world, is the major focus of research and development object.This paper firstly analyzes the characteristics of the ground network and the satellite network.Then describes some existing routing and wavelength assignment algorithms.Also analyzes the existing satellite and ground intergrated optical network scheme and its shortcomings. Then we design an integer linear programming model to solve satellite and ground intergrated optical network routing problem and analyzes it. We find that different existing link cost and different new link cost will affect the final business requests. The conclusion will give our subsequent star blend routing algorithm for optical networks to provide a theoretical basis.Then the dynamic characteristics of the satellite ground link and the satellite link are analyzed.This paper also presents new applicable to the satellite to ground fusion optical network satellite ground link access scheme, that from the comprehensive weighted access strategy, considering the satellite link load bandwidth, service time and effect of communication delay on satellite ground link, after the fusion routing algorithm provides a theoretical basis.In this paper, we design a routing algorithm based on the optical network. Then for different scenarios of the star to the fusion network, this paper also puts forward a targeted solution, making the whole network in the face of different business needs can work, more perfect. Finally, aiming at the shortcomings of the existing platform, this paper makes a certain improvement.First, focus all control functions on the central control node.Second,Modify the inter satellite business and business processes on the ground.Third,Increased star to ground business.In this paper, the study of the optical network star integration provides a theoretical basis and design basis, and provides a certain reference value to their practical application.