For Routing Algorithm Of LEO Satellite WDM Network Based On Wavelength Routing

Satellite optical network is the communication system which is based on WDMand on-board switching technology. Routing algorithm design must be on the basis ofthe particular features of satellite optical network.Firstly, analyze the characteristics of satellite optical network. Do the job on thenetwork topology structure of the NELS constellation system. Use the track ofsub-satellite point to describe the satellite node’s location relative to the Earth. Throughsimulation by the communication link between satellites and the characteristics ofsatellite network, analog the node performance and topology among satellite network onoperation. Discuss the communication delay and obstruction of the networkperformance in theory.Secondly, simulate satellite optical network traffic characteristics taking use of theactual satellite voice service. Present the flow ratio to describe the task volume of arunning network. In line of historical data, sum up the flow model of satellite network toshow the influence of the traffic-related parameters on network performance. Inaccordance with the way of handling new tasks, divide the system into to threecategories: the loss system, the wait system and the mix system. Analyze the differencebetween three ways on network performance, and give optional program of satellitedealing with the new task.Thirdly, introduce and compare the dynamic and static routing algorithm. Makesure the designed objective, put forward the available plan of improving dynamicrouting algorithms. RWA is generally divided into two parts in the project, namely therouting algorithm and wavelength assignment. Among WDM satellite networks, theavailable number of wavelength is limited. Propose the reserve wavelength allocationscheme, and the selection of path is a classic shortest path algorithm. Show thesimulation result of difference between the static and dynamic routing algorithm aboutimproving network performance.Finally, analyze and discuss the primary module of new dynamic algorithm.Calculate the update cycle of dynamic routing table. The reserved wavelength iscompared with the other two ways. Actually the wavelength assignment algorithmindicates perfect performance. Different reservation scheme will produce some differentnetwork response features. Propose four earmarked schemes and compare, give a morereasonable alternative determine.This thesis is aimed at providing valuable reference of routing scheme for futuresatellite optical network.