Satellite link based one-to-many data transmission system, and method

Abstract

The invention discloses a satellite based one-to-many data transmission system, and method. According to the bandwidth of data generated by each task load and the number of corresponding receiving points, a network protocol is selected for the data generated by each task load, and the network data of the task load is packaged according to the selected network protocol and is sent to an assigned network interface of an airborne network switch; large bandwidth data is transmitted through a user datagram protocol (UDP) multicast protocol, and small bandwidth data is transmitted through a transmission control protocol / internet protocol (TCP / IP) or UDP point-to-point dissemination protocol; and when the UDP multicast protocol data and point-to-point dissemination protocol data coexist, virtual local area network (VLAN) division is performed. Due to use of the virtual network and flexible selection of the network protocol, a plurality of data receiving ends can receive signals, and data occupied bandwidth is reduced when air-ground communications is carried out in data generation ends like an unmanned plane and so on by use of a satellite communications link.

Description

technical field [0001] The invention relates to a one-to-many data transmission system and method based on satellite links, in particular to a method and system for multi-point reception of large-bandwidth data carried by an unmanned aerial vehicle through satellite links. Background technique [0002] The UAV system can realize functions such as self-controlled flight, remote measurement and remote control, and multiple data return, mainly relying on its data measurement and control link subsystem; at this stage, the data measurement and control link subsystem is mainly divided into line-of-sight take-off and landing system and satellite communication system, in the early application of UAVs, due to the small mission radius and the high flying height of the mission platform, the conventional line-of-sight take-off and landing measurement and control system can meet the measurement and control and data return of UAVs in the operation area. With the promotion of the UAV civil...

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Problems solved by technology

[0003] In recent years, there are more and more applications for UAVs to receive data from satellites for multi-point reception on the ground. However, it is not difficult to find in actual use that the large-bandwidth data generated by UAVs is sometimes It occupies almost the entire satellite bandwidth resource. Although the satellite only provides a transparent transmission data channel, the frame format passing through the channel still needs to have a certain protocol. In order to ensure the accuracy of communication and distinguish ground users, conventional satellite links mainly use TCP / IP data architecture, at this time, if there is large-bandwidth data received at multiple points at the same time, the target IP address information is different, there will be multiple channels of large-bandwidth data in the channel, resulting in channel congestion

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