Satellite network access selection method based on QoS constraint and load balancing

Abstract

The invention discloses a satellite network access selection method based on QoS (Quality of Service) constraint and load balancing, which mainly solves the problems of unbalanced overall load of a network and high real-time service time delay when a satellite is selected to access in the prior art. The method comprises steps of when a user initiates a service request, firstly identifying the typeof the service, and judging the relationship between the idle bandwidths of all satellites covering the user and the minimum bandwidth required by the service request to obtain an accessible satellite set; determining the dependence degree of the service on each parameter, and calculating the QoS comprehensive weighted value and the network load value of each satellite in the accessible satelliteset; and finally, calculating to obtain a comprehensive utility function value, and taking the satellite with the minimum function value as the satellite selected to be accessed by the user. According to the method, the service quality of the user and the overall load condition of the network are comprehensively considered, the end-to-end time delay of the real-time service and the new call blocking rate of the network are reduced, the satisfaction degree and the resource utilization rate of the user are improved, and the method can be used for satellite network communication.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a satellite network access selection method, which can be used for user selection access during satellite network communication. Background technique [0002] Traditional terrestrial networks will be affected by factors such as natural disasters and extreme terrain during the construction process, making it difficult to build network equipment. Therefore, only relying on terrestrial wireless communication systems cannot achieve true global seamless coverage. Satellite communication has the advantages of wide coverage, good flexibility, and strong anti-destructiveness, and can supplement and improve the ground network to a large extent. In recent years, with the development of satellite communication technology, the number of satellites deployed in the satellite network has gradually increased, and the possibility of ground users being simultaneously covered by multipl...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that, as user service requests continue to increase, only considering the best individual service quality in the process of user access selection may lead to unbalanced overall load of the network, making some satellites very lightly loaded and others Satellites are fully loaded, which will increase the probability of data congestion and transmission interruption

The disadvantage of this method is that it is not sensitive to the type of service requested by the user, that is, it cannot effectively distinguish real-time services from non-real-time services, which may cause real-time services to have a high delay

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