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Method for ensuring inter-satellite routing of low-orbit satellites through high-performance QoS based on SDN

A low-orbit satellite, high-performance technology, applied in the field of satellite networking, can solve the problem of increased complexity of routing methods

Active Publication Date: 2022-05-17
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Application Information

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Problems solved by technology

It can respond in real time to satellite node failure, link congestion, etc., but the complexity of its routing method increases significantly

Method used

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  • Method for ensuring inter-satellite routing of low-orbit satellites through high-performance QoS based on SDN
  • Method for ensuring inter-satellite routing of low-orbit satellites through high-performance QoS based on SDN
  • Method for ensuring inter-satellite routing of low-orbit satellites through high-performance QoS based on SDN

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Embodiment Construction

[0077] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0078] The method flow chart of a kind of SDN-based high-performance QoS guarantee low-orbit satellite inter-satellite routing method proposed by the present invention is as attached figure 1 shown. Specifically include the following steps:

[0079] (1), according to the link state of the inter-satellite link and the link duration and disconnection time, calculate the link initial weight function and link survival and stability function;

[0080] (2), calculate the link load matrix and the link load function according to the inter-satellite link traffic load state obtained by GEO;

[0081] (3), according to the different requirements of different business types, calculate the weight factor matrix and the adjustment factor to ensure the QoS of multiple users;

[0082] (4) Normalize the initial weight function, link stability and link load fu...

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Abstract

The invention discloses an SDN (Software Defined Network)-based high-performance QoS (Quality of Service) inter-satellite routing ensuring method for low-orbit satellites, which utilizes an SDN network system architecture to save limited on-satellite computing and storage resources and improve the self-adaptive capability of a satellite communication network. An initial weight function, a link stability function and a link load degree function of the inter-satellite link are obtained by considering the time delay, available bandwidth, link switching and load factors of the inter-satellite link, a weight factor matrix is calculated for service types with different requirements, the influence of a bottleneck node is reduced by utilizing an adjustment factor, and the service quality of the inter-satellite link is improved. And updating the path decision matrix according to the link cost function. According to the method, congestion nodes are effectively avoided, the problem of service path reconstruction caused by link switching is reduced, complexity is low, good performance is achieved in the aspects of time delay, link stability and load balancing, and QoS of multiple users is guaranteed.

Description

technical field [0001] The invention belongs to the field of satellite networking, in particular to an SDN-based high-performance QoS guaranteed low-orbit satellite inter-satellite routing method. Background technique [0002] With the development of global network and information demand, the ground communication network can no longer meet the increasing user demand. The future space-ground integrated information network will provide more resources than the current network. Satellite communication is an ideal long-distance communication technology, which can not only overcome the limitations of geographical conditions, but also provide cheap, continuous and reliable communication channels. Therefore, combining the advantages of global coverage, mobility and scalability of the satellite network with the huge transmission capacity and low latency of the ground network has become a demand to realize the integrated information network of space, space and ground. However, the d...

Claims

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Application Information

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IPC IPC(8): H04B7/185
CPCH04B7/1851H04B7/18519H04B7/18521Y02D30/70
Inventor 王奎宇宋晓勤雷磊缪娟娟张昕婷
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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