DCS system satellite link downlink data confirmation frame transmission method

Abstract

The invention discloses a satellite link downlink data acknowledgement frame format and transmission method in a satellite DCS. The method includes the steps that A, the acknowledgement frame format is a variable-length frame format of a down link transmission acknowledgement data frame of a DCS satellite system, and the frame format is composed of a service identification, a bit variable-length satellite ID bit and a data information word identification; B, the acknowledgement frame transmission method is a down link acknowledgement frame transmission method based on the combination of a multicast and unicast hybrid transmission mode and a variable-length acknowledgement frame format compression technique. When the physical distance of a DCP is short, the DCP can be joined into the same multicast group, a multicast mode is used for conducting group confirmation, otherwise a unicast mode is adopted, compressed optimization is carried out on the down link acknowledgement frame, and optimized compression is achieved by the way that bit compression, amplitude coding and variable-length compressed encoding are combined. The variable-length frame format is flexible in design, and the transmission method is easy to implement and efficient.

Description

[0001] 1 technical field [0002] The invention is designed in the field of satellite communications, and relates to a multi-terminal satellite data acquisition system (DCS) satellite data acquisition system. [0003] 2 background technology [0004] The data acquisition system (DCS) in satellite communications is a system that collects data or locates the data acquisition platform through a remote data acquisition platform. It uses aerospace technologies such as telemetry, remote control and remote monitoring, and transmits the various monitoring data collected by the remote data acquisition platform to the ground receiving processing center through satellite real-time or storage and forwarding, and finally the data processing center delivers the data to User use. Although hundreds or even thousands of data collection platforms are geographically dispersed, they are organically linked through the DCS system and work together to complete a monitoring task. Most of the data collecti...

AI Technical Summary

Problems solved by technology

[0007] The traditional confirmation method is to confirm the ground DCP data sequentially. As the number of DCPs increases, the confirmation time also increases linearly. The overhead time of DCS satellites is about 20 minutes, which limits the number of ground DCPs.

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