Local code updating method and local code updating system for micro-satellite system

Abstract

The invention discloses a local code updating method for a micro-satellite system. The local code updating method includes (1), building a module calling table; (2), acquiring an ID (identification) of a failure module; (3), finding out the corresponding module locally according to the ID and compiling the module to obtained an executable file; (4), uploading the compiled executable file; (5), loading the executable file to an RAM (random access memory); and (6), updating the module calling table. The invention further discloses a local code updating system for implementing the method. The local code updating method and the local code updating system have the advantages that a local updating mode is adopted for building the module calling table, so that the problem of low updating speed in the prior art is effectively solved; as the size of the uploaded file is greatly reduced, utilization rate of link resources between a satellite and the ground is greatly increased; and normal running of other programs can be guaranteed.

Description

technical field [0001] The invention belongs to the technical field of computers, and in particular relates to a local code update method and system for micro-satellite systems. Background technique [0002] Due to the harsh environment of outer space, the storage devices in the micro-satellite system may be damaged, which will cause some programs to fail to operate normally. In this case, if these programs are not updated, the entire satellite may fail to operate normally. Seriously may lead to the failure of the entire satellite. [0003] On-orbit software update is a remedial measure to replace the original version with a new version of the software that it evades after discovering mission software errors or loopholes during the satellite’s in-orbit operation. Therefore, on-orbit software update is not only one of the objective requirements of the satellite system, but also the inevitable evolution direction of the micro-satellite integrated electronic technology. [00...

AI Technical Summary

Problems solved by technology

[0006] First of all, the update speed is slow and the success rate is low; every time the software is updated on-orbit, the entire software or the entire configuration item must be injected into the star.

Especially when the effectively updated code only accounts for a small part of the updated software or configuration items, but all applications or configuration items still need to be updated. In the case of low communication speed and high bit error rate of the satellite-ground link , the update speed is slow and the success rate is low

[0007] Secondly, the resources of the link between the satellite and the ground are wasted; due to the low effective speed of the communication between the satellite and the ground, the communication resources between the satellite and the ground are limited, and when the effective update code accounts for an extremely small proportion of the updated software or configuration items, serious waste and occupation Star-earth resources affect the use of star-earth communication by other modules

[0008] Again, the update causes the interruption of program operation; since the code update relies on the bootloader program, it needs to restart the system by reprogramming and powering on again, and the system operation inevitably needs to be interrupted

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