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

An adaptive and routing technology, applied in the direction of advanced technology, data exchange network, digital transmission system, etc., can solve the problems of unguaranteed calculation time and slow algorithm convergence speed, so as to reduce frequent switching, small communication delay and good application foreground effect

Active Publication Date: 2021-10-29
DALIAN UNIV
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  • Abstract
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  • Claims
  • Application Information

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

Method used

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Embodiment

[0135] Embodiment: The present invention uses STK and MATLAB to carry out joint simulation, and STK software can simulate the dynamic satellite network scene, uses three high-orbit satellites that can cover the whole world and 30 iridium-like constellations as low-orbit satellites, and selects 20 non-uniform satellites at the same time The distributed ground nodes serve as ground stations. The satellite coordinates are updated every 1s, the coordinates are calculated according to the satellite position, the position and orbit parameter information are output, and the dynamic topology matrix is ​​generated. After the generated dynamic topology is imported into MATLAB, MATLAB is used to establish intra-domain and inter-domain paths and dynamically based on path transmission costs. Routing policy simulation simulation. The simulation data packet is sent at the ground station, transmitted by the satellite node, and finally received by the ground station. The simulated satellite p...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/715H04L12/24H04B7/185
CPCH04L45/46H04L41/12H04L41/145H04B7/18519Y02D30/70
Inventor 杨力潘成胜魏德宾戚耀文李涵睿
Owner DALIAN UNIV
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