公开(公告)号：US20200343968A1

公开(公告)日：2020-10-29

申请号：US16856721

申请日：2020-04-23

Applicant: Beijing University of Posts and Telecommunications

Inventor： Liang LIU ,  Huadong MA ,  Pengrui DUAN ,  Dan XIA

IPC: H04B7/185 ,  H04W84/06 ,  H04L12/721 ,  H04L12/751 ,  H04L12/715 ,  H04L12/717 ,  H04L12/741 ,  H04W40/24

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.