Data service transmission method of low-orbit satellite Internet of Things based on segment connection

Abstract

The invention discloses a low-orbit satellite internet of things data service transmission method based on sectional connection, which comprises the following steps: S1, the low-orbit satellite authenticates the basic information of the terminal, then registers the identity information, and establishes a connection; S2, the LEO satellite notifies a terminal that the attachment is successful; 3, the terminal sends a data packet to the low-orbit satellite; 4, whether that labelled data packet in the terminal needs to send confirmation information is checked, and the low-orbit satellite carries out corresponding operation according to the inspection result; 5, the LEO satellite labels the terminal information of the data packet and transmits the data packet with the completed terminal information label to an earth station; S6, the earth station simulates the instruction interaction between the terminal and the base station by adopting a deception mechanism, and establishes the connectionbetween the simulation terminal and the simulation base station; S7, the earth station accesses the core network to complete the data transmission. The invention has excellent use effect and high useand popularization value.

Description

technical field [0001] The invention relates to a transmission method, in particular to a segmented connection-based low-orbit satellite Internet of Things data service transmission method, which belongs to the technical field of the Internet of Things. Background technique [0002] Narrowband IoT has been certified by the international organization 3GPP in 2016. As a new generation of IoT technology based on cellular networks, it provides low-bandwidth, low-power consumption, long-distance, and large-connection IoT application services. The current narrowband Internet of Things business is limited to the ground, and it is necessary to rely on satellite communication systems to truly achieve seamless global coverage of the Internet of Things. Low-orbit satellites have the characteristics of low orbit height, high time efficiency, small signal transmission loss, and wider connection range. They can be better applied to low-orbit satellite IoT systems than high-orbit satellite...

AI Technical Summary

Problems solved by technology

However, the NB-IoT protocol is still based on LTE (Long Term Evolution, that is, long-term evolution). During the entire communication process, the user equipment and the evolution node need to be continuously connected. If the data transmission scheme of the NB-IoT is directly applied to the low-orbit satellite is not feasible in the system

[0005] Specifically, first of all, the communication protocol terminals of the narrowband Internet of Things frequently interact with the base station, and in the satellite environment, the dynamic constellation topology and the change of the satellite position relative to the ground cause the connection between the Internet of Things terminal and the base station to be unstable. Stable; secondly, resources on the star are limited, and an unstable link needs to store a large amount of context information on the star to try to connect again, resulting in an overload of resources on the star

[0006] To sum up, the low-orbit satellite Internet of Things is still in the research stage as an emerging means of global Internet of Things communication, and there is no data transmission scheme suitable for the current environment in the existing communication process

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