SDN (Software Defined Network)-based space-ground integrated adaptive dynamic QoS (Quality of Service) routing method

Abstract

The invention discloses an SDN (Software Defined Network)-based space-ground integrated adaptive dynamic QoS (Quality of Service) routing method. The method comprises the following steps of: establishing an SDN-based hierarchical clustering network model; establishing network resource mapping; and establishing a multi-constraint QOS adaptive routing algorithm SDN-AD. According to the method, the control overhead can be effectively reduced by reducing long-distance transmission and shortest distance clustering of the control packet, and the transmission efficiency is improved. According to the method, the multi-constraint QoS problem is formulated into the optimization problem with the minimum transmission cost as the target, the transmission cost of links of different types can be effectively calculated, and the difference between satellites of different levels and a ground network is shielded. The method can better adapt to network changes, so that services meeting different service quality requirements are provided. According to the invention, the optimization problem is solved, and self-adaptive routing is realized. The method provided by the invention has better performance in the aspects of overhead control, network service quality and algorithm convergence speed.

Description

technical field [0001] The present invention relates to a space-ground integrated network, in particular to a distributed SDN-based space-ground integrated adaptive dynamic routing method (SDN-AD for short, Adaptive Dynamic Routing Strategy for Distributed SDN). Background technique [0002] The Space-Ground Integrated Network (SGIN, The Space-Ground Integrated Network) integrates satellites and ground networks. It has the characteristics of wide coverage, on-demand access, and communication not restricted by geographical conditions. It can support diverse communication needs and is the future network. new trends in development. With the rapid development of the space-ground integrated network, the requirements of various communication services in the network have also undergone tremendous changes, and clear quality assurance requirements have been put forward in terms of bandwidth, delay, and packet loss rate. In order to meet business requirements, it is necessary to prov...

AI Technical Summary

Problems solved by technology

Lagrangian relaxation method QoS routing algorithm (MQOO, lagrangian relaxation method QoS routing) under the satellite network architecture based on SDN, the approximate algorithm can obtain relatively accurate calculation results, but the calculation time cannot be guaranteed

A routing algorithm (SRADR, Status and Reputation Adaptive QoS Dynamic Routing) suitable for satellite network status and reputation adaptive quality of service, using ant colony algorithm for route discovery and maintenance, realizing self-adaptation of service quality, but the algorithm convergence speed is slow

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