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Software define link topology discovery method in space-based backbone network

A topology discovery and backbone network technology, which is applied in the field of link topology discovery in software-defined space-based backbone networks, can solve problems such as complexity, high computational complexity, and redundant interaction processes, and achieve good compatibility

Inactive Publication Date: 2017-03-22
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In the software-defined network, the traditional southbound interface protocol OpenFlow is designed for the ground network, and there are problems of redundant and complex interactive processes and high computational complexity.

Method used

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  • Software define link topology discovery method in space-based backbone network
  • Software define link topology discovery method in space-based backbone network
  • Software define link topology discovery method in space-based backbone network

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Embodiment Construction

[0026] In order to make the object, technical scheme and advantages of the present invention clearer, the following reference Figure 1-Figure 3 Examples are also given to further describe the inventive solution in detail. The space-based backbone network includes a satellite (including a space-borne switch), a satellite terminal, a user subnet composed of users attached to the satellite terminal, and a space-based network controller.

[0027] The core idea of ​​the present invention is: when the space-based switch establishes an initial connection with the space-based network controller, it responds to the OFPT_FEATURES_REQUEST message of the space-based network controller through the OFPT_FEATURES_REPLY message of the OpenFlow protocol, and the space-based network controller uses the OFPT_FEATURES_REPLY message to obtain each space-based network controller. The port information of the switch enables the onboard switch to distinguish the LLDP frames forwarded by each port of ...

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Abstract

The invention discloses a software define link topology discovery method in a space-based backbone network. The detection overhead of a space-based network controller which uses an OpenFlow protocol to realize the topology discovery of a space-based backbone network onboard borne switch. The method comprises the steps that a specific flow entry is set for the onboard switch to realize port-by-port LLDP frame copy on LLDP frames from the controller; the source MAC address is rewritten into the MAC address of the port (the Port ID value); and the number of the LLDP frames sent by the controller is reduced from being proportional to the total number of the ports of whole network onboard switches to being proportional to the total number of whole network onboard switches, so as to reduce the topology discovery detection overhead.

Description

technical field [0001] The invention relates to the technical field of space-based backbone network communication, in particular to a method for discovering link topology in a software-defined space-based backbone network. Background technique [0002] Software-defined networking (SDN) was first proposed by Stanford University in 2008, aiming to decouple the control and forwarding of traditional networks, and provide highly flexible, elastic, and customizable services for various upper-layer network applications and services. SDN adopts a logically centralized control plane (that is, space-based network controller), which saves the overhead of interactive control information between network nodes compared with distributed control; Distributed control signaling, easy to achieve high reliability, high performance and other advantages. [0003] The current satellite network has a ground network management and control center, which is responsible for the allocation and manageme...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/751H04L12/24H04L45/02
CPCH04L41/12H04L45/02Y02D30/00
Inventor 窦志斌张亚生
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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