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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11664886 B1

PDFFull Text
Date of Patent:
May. 30, 2023

Filed:

Apr. 23, 2020

Routing method and apparatus for sdn based leo satellite network

Applicant:

Beijing University of Posts and Telecommunications, Beijing, CN;

Inventors:

Liang Liu, Beijing, CN;

Huadong Ma, Beijing, CN;

Pengrui Duan, Beijing, CN;

Dan Xia, Beijing, CN;

Assignee:

Beijing University of Posts and Telecommunications, Beijing, CN;

Attorney:

Renner, Otto, Boisselle & Sklar, LLP

Primary Examiner:

Jackie Zuniga Abad

Int. Cl.
CPC ...
H04B 7/185 (2006.01); H04L 45/02 (2022.01); H04L 45/00 (2022.01); H04L 45/42 (2022.01); H04L 45/64 (2022.01); H04L 45/745 (2022.01); H04W 40/24 (2009.01); H04W 84/06 (2009.01);
U.S. Cl.
CPC ...
H04B 7/18521 (2013.01); H04B 7/18554 (2013.01); H04L 45/02 (2013.01); H04L 45/38 (2013.01); H04L 45/42 (2013.01); H04L 45/64 (2013.01); H04L 45/745 (2013.01); H04W 40/248 (2013.01); H04W 84/06 (2013.01);
Abstract

A routing method and apparatus for SDN-based LEO satellite network are disclosed. The LEO satellite network includes a control plane and a data plane. The control plane includes a central controller and a plurality of local controllers. The data plane includes a plurality of LEO satellite nodes and user terminals connecting to the LEO satellite nodes. The control plane may be located on the earth, and thus the centralized management and control of the data plane are placed on the earth. A local controllers monitors LEO satellite nodes in a subnet or subnets of the local controller. The distance between a local controller and a LEO satellite node is much smaller than the distance between a GEO satellite node and the LEO satellite node, and thus the time delay and the traffic loss of communication are reduced.

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