Uplink data communication method for spacecraft multilevel subnets

Abstract

The invention discloses an uplink data communication method for spacecraft multilevel subnets and belongs to the technical field of communication. A communication link transmission unit (CLTU) is produced by a ground station and is transmitted to a link layer router controller. The link layer router controller judges whether a received instruction is a direct instruction or an indirect instruction. If the received directive is the direct directive, the CLTU is directly extracted and all-level subnet remote terminals are controlled through cables. If the received directive is the indirect directive, the CLTU is transferred to a primary subnet main control terminal. The primary subnet main control terminal extracts all remote control frames to be analyzed one by one. When a remote control frame belongs to the subnet, a remote control packet parse is carried out by a corresponding terminal of the subnet, and otherwise the remote control frame is transferred to a target subnet. The other subnet main control terminals receive all remote control frames transferred by super-level subnets to be analyzed one by one. When the remote control frame belongs to the subnet, the remote control packet parse is carried out by the corresponding terminal of the subnet, and otherwise the remote control frame is transferred to the target subnet. The data uploading communication method is not only compatible with an existing direct instruction and hardware processing, but also capable of supporting communication between satellite-borne multiple subnets and the ground.

Description

technical field [0001] The invention discloses an uplink data communication method for multi-level subnets of spacecraft, belonging to the technical field of communication. Background technique [0002] The subsystems and modules in the spacecraft have generally used microprocessors (such as multiple subsystems or a single machine with data processing capabilities), and users hope to independently convert the format and content of data packets according to the principle of "demand-driven"; standardization of on-board equipment, Modularization development requires the data interface between devices to be converted from a cyber-physical interface to a data packet interface, which is the formatting requirement for on-board device data exchange. Other types of data, such as Internet data, can enter the spacecraft smoothly, making it easy to change the control of the spacecraft from a single-task single-user system to a multi-task and multi-user operation, and facilitate the real...

AI Technical Summary

Problems solved by technology

[0006] More importantly, the uplink remote control protocol cluster standard issued by CCSDS is a three-layer data protocol, and its data content i

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