Control message snapshot routing method of software-defined satellite network based on LEO/MEO
A satellite network, software-defined technology, applied in the satellite network field, which can solve the problems of packet loss, frequent snapshot switching, etc.
Active Publication Date: 2018-11-06
NAT UNIV OF DEFENSE TECH
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Problems solved by technology
[0011] The technical problem to be solved by the present invention is to provide a control message snapshot routing method based on LEO / MEO software-defined satellite network, which solves frequent snapshot switching, frequent rerouting of control messages and loss of control message packets in the prior art , additional packet delay, and packet out-of-sequence problems, improve the reliability and stability of control message transmission in LEO / MEO-based software-defined satellite networks
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[0063] figure 1 It is a schematic diagram of the LEO / MEO-based software-defined satellite network architecture of the present invention. The LEO / MEO-based software-defined satellite network consists of a LEO / MEO satellite constellation, a ground station, and a Network Operation and Control Center (NOCC). Among them, the satellites in the LEO / MEO satellite constellation are interconnected through the inter-satellite link, the satellite and the ground station are connected through the satellite-ground link, and the ground station and the NOCC are connected through the ground link. As the controller of the software-defined satellite network, NOCC is responsible for centralized control of the entire network; the satellites in the LEO / MEO satellite constellation are used as switches of the software-defined satellite network, and are responsible for processing and forwarding control messages according to the control rules sent by NOCC; The ground station is responsible for establish...
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The invention discloses a control message snapshot routing method of a software-defined satellite network based on LEO / MEO. The technical scheme is as follows: dividing the topology within a topologyperiod of the software-defined satellite network based on LEO / MEO into an initial snapshot sequence by using a link on-off snapshot division method; merging snapshot fragments in the initial snapshotsequences to obtain second snapshot sequences; judging whether the software-defined satellite network based on LEO / MEO meets a simplified snapshot merging condition, if yes, merging the second snapshot sequences by using a simplified snapshot merging method, and if no, merging the second snapshot sequences by using a basic snapshot merging method to obtain a third snapshot sequence; calculating the routings between all satellites and NOCC for each snapshot in the third snapshot sequence, sending the routings to all nodes in the network, and updating, by the nodes, the routings at the snapshotswitching moment. By adoption of the control message snapshot routing method disclosed by the invention, the frequent re-routing of control messages can be solved, and the reliability and stability ofcontrol message transmission are improved.
Description
technical field [0001] The present invention relates to the technical field of satellite networks, in particular to a software-defined satellite network based on low earth orbit and medium earth orbit (ie LEO / MEO, Low Earth Orbit / Middle Earth Orbit) (hereinafter referred to as LEO / MEO-based A control packet snapshot routing method for a software-defined satellite network). Background technique [0002] The satellite network has outstanding advantages such as global coverage and no dependence on ground infrastructure, and has attracted widespread attention worldwide. At present, satellite networks are increasingly integrated with terrestrial networks such as cellular networks, the Internet of Things, and the Internet to form a space-ground integrated network. However, the traditional satellite network is built according to the technical idea of custom-made, isolated and closed, and faces prominent problems in network integration, resource management, and function configura...
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IPC IPC(8): H04B7/185H04W40/02
CPCH04B7/18513H04B7/18519H04W40/02
Inventor 赵宝康刘波费长江吴纯青虞万荣毛席龙陶静时向泉原玉磊韩彪
Owner NAT UNIV OF DEFENSE TECH