Handover control method and system based on resource reservation in satellite network

Abstract

The invention discloses a handover control method and system based on resource reservation in a satellite network. The method comprises the steps of: 1, determining a service statistical average communication duration, a bandwidth demand and a service handover interruption rate according to a service request of a terminal; 2, dividing one beam cell into multiple sub-cells according to the servicestatistical average communication duration based on the relation between the service statistical average communication duration and a satellite network beam cell channel duration; 3, calculating beamsub-cells of a satellite accessed by the service terminal; 4, setting the time when the terminal initiates a resource reservation request in each sub-cell by using the predictability of satellite network link handover and the positioning information of the terminal; and 5, implementing resource reservation of different methods for a new network access service and a service to be handed over according to the real-time resource status of next beam sub-cell.

Description

technical field [0001] The invention relates to a satellite network switching control method and system based on resource reservation, in particular to a method for reasonably reserving resources in the satellite network switching process by establishing a beam sub-cell mechanism. Background technique [0002] Compared with the geostationary orbit satellite communication system, the medium and low orbit satellite communication system has the advantages of low transmission delay, rich orbital resources and low power consumption of user terminals due to the orbit height of the constellation. However, due to the relative motion between the user terminal and the medium and low orbit satellite constellation, Moreover, the coverage area of ​​a single-satellite single-beam cell is limited, and user terminals often need to perform beam switching or even inter-satellite switching during communication to ensure uninterrupted communication of services. [0003] Usually, the handover in...

AI Technical Summary

Problems solved by technology

Consider a satellite constellation consisting of six MEO satellites with an orbital altitude of 8000km and an orbital inclination of 0°. The satellite coverage time is about 1.3h, and the beam coverage time is about 25min. The duration obeys a Poisson distribution with a mean value of 10min. Taking the voice service as an example, the existing resource reservation policy will reserve 25 minutes of bandwidth resources for this service in the next cell. Since the average service duration is 10 minutes, it is obvious that this kind of resource reservation mechanism will cause huge Waste of resources, and for satellite communication systems with extremely limited and precious bandwidth resources, the cost of waste of resources is very huge

Images