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Low earth orbit satellite network switching method, device and system

A technology of network switching and low-orbit satellites, which is applied in the field of satellite networks, can solve problems such as increasing packet loss rate and network delay, and achieve the effect of reducing delay and packet loss rate, reducing data requests and other workflows

Inactive Publication Date: 2020-07-28
SHENZHEN AEROSPACE INNOTECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing satellite and base station switching methods are all hard switching methods. Direct switching between satellites and base stations causes network delays and increases the packet loss rate.

Method used

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  • Low earth orbit satellite network switching method, device and system
  • Low earth orbit satellite network switching method, device and system
  • Low earth orbit satellite network switching method, device and system

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0063] Embodiment one: refer to figure 1 , shows a schematic flowchart of a method for switching a low-orbit satellite network in an embodiment of the present invention. The embodiment of the present invention discloses a low-orbit satellite network switching method, which is executed by a base station, and specifically includes steps:

[0064] S11. Detect the pilot signal strength of the satellites in the field;

[0065] Since the satellite is in high-speed movement all the time, the position of the base station keeps changing. Therefore, with the high-speed movement of the satellite, the distance between the satellite and the base station is also changing. If two base stations on the ground are connected to the same low-orbit satellite to complete communication data transmission at the beginning, with the high-speed movement of the satellite, one of the base stations enters the signal coverage of the other satellite, and the base station detects the pilot signal of the sat...

Embodiment 2

[0069] Embodiment two: refer to figure 2 , the embodiment of the present invention discloses a low-orbit satellite network switching method, which is executed by the control center, including:

[0070] S21. Receive a switching request from the base station and detect whether the switching request is reasonable; before the base station switches satellites, the switching request is received from the base station, and the switching request needs to be judged. Since the control center collects the global network view and the forwarding relationship that the base station originally connected to the satellite, that is, the flow entry, it needs to determine the flow entry between the base station and the satellite after receiving the handover request.

[0071] If the handover request is reasonable, a handover command with target information is issued to the base station. After the handover request is reasonable, a handover command with target information is sent to the base station...

Embodiment 3

[0074] Embodiment three: refer to image 3 , the embodiment of the present invention discloses a low-orbit satellite network switching method, which is performed by satellites, including:

[0075] S31. Receive a data request from the base station; when the base station starts switching satellites and accesses beams of unconnected satellites, and at the same time the data flow is transferred from the original communication link to a new communication link, then receive the data request from the base station.

[0076] S32. Detecting whether there is a flow entry from the source address to the destination address in the own flow table;

[0077] S33. If there is a flow entry, perform next-hop data forwarding according to the specified flow entry.

[0078] After receiving the data request, it first checks whether there is a flow entry from the source address to the destination address in its own flow table. And the flow entry includes: communication duration, idle timeout, matchi...

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Abstract

The invention discloses a low-orbit satellite network switching method, device and system, and the method is executed by a satellite, and comprises the steps: receiving a data request from a base station; detecting whether a flow table entry from an original address to a destination address exists in a self flow table or not; and if the flow table item exists, performing data forwarding of the next hop according to the specified flow table item. The flow table is issued in advance for switching, unnecessary data requests and other workflows are reduced, and then the time delay and the packet loss rate brought by switching between the base station and the satellite are effectively reduced.

Description

technical field [0001] The invention relates to the technical field of satellite networks, in particular to a low-orbit satellite network switching method, equipment and system. Background technique [0002] Establishing an efficient and reliable satellite communication network is the general trend of 5G and even 6G development in the future. Due to its vast coverage area, large space-time span and highly dynamic network topology, the traditional satellite network has brought problems such as large propagation delay of communication links and poor propagation effect. In addition, unlike ground network resources, satellite Poor network computing power and limited network resources. [0003] Due to the high-speed motion of low-orbit satellites relative to the earth's surface, users cannot always use the same satellite or beam for communication during the communication process, and need to frequently switch user data links from one satellite to another. However, the existing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04L12/741H04W36/14H04W84/06H04L45/74
CPCH04B7/1851H04B7/18519H04L45/54H04W36/14H04W84/06
Inventor 闫泽涛冯汉炯李德志
Owner SHENZHEN AEROSPACE INNOTECH
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