NDLI: How RMAP improves in-flight update of on-board software via SpaceWire

Content Provider	IEEE Xplore Digital Library
Author	Michel, H. Belger, A. Fiethe, B. Lange, T. Michalik, H. Kolleck, M.
Copyright Year	2014
Description	Author affiliation: Max Planck Inst. for Solar Syst. Res., Gottingen, Germany (Kolleck, M.) \|\| Inst. of Comput. & Network Eng., Tech. Univ. Braunschweig, Braunschweig, Germany (Michel, H.; Belger, A.; Fiethe, B.; Lange, T.; Michalik, H.)
Abstract	Modern space probes such as Solar Orbiter employ a SpaceWire network to connect to on-board computer (OBC), solid state mass memory (SSMM), and scientific instruments. Management of SpaceWire links within scientific instruments is typically performed by a data processing module (DPM) featuring a space qualified processor that is executing on-board software. To adapt to changing mission requirements, account for failures and fix possible software bugs, the ability of uploading and patching instrument software is mandatory. However uploading and over-writing of the software's boot image cannot securely be performed by the software itself. If over-writing the boot image fails, the remaining image might be corrupted. So the processor may not be able to reboot successfully and no further upload would be possible. Therefore reception of uploaded patches must be performed by an independent entity. Currently, this is accomplished by a dedicated boot loader in separate memory area, to be qualified according to ECSS criticality category B. This boot loader processes uploading of patches and copies them to the second boot area, where the actual software including the operating system is stored. Due to the opportunity of modern processors to handle SpaceWire RMAP accesses (e.g. SpW-RTC, UT699, GR712RC [1], or upcoming NGMP [2]), it would be possible to perform uploading and patching of the instrument software independent of software execution using RMAP. This would dramatically simplify the development, eliminate the need for a class-B qualified boot loader, and will inherently improve reliability, as reception of patches would entirely be performed by hardware. This paper presents a possible update and patch process for boot images using hardware based RMAP features. Furthermore implications of the standard ECSS services affecting such patching routines are discussed.
Starting Page	1
Ending Page	4
File Size	492113
Page Count	4
File Format	PDF
ISBN	9780955719653
DOI	10.1109/SpaceWire.2014.6936232
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-22
Publisher Place	Greece
Access Restriction	Subscribed
Rights Holder	University of Dundee
Subject Keyword	Space vehicles Protocols SpaceWire Instruments Memory management CCSDS PUS In-flight update Software Registers RMAP Standards Boot loader
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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