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Volumetric data throughput optimisation by dynamic FEC bearing frame length adaptation

Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2010.

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Main Author: Christelis, Christian
Other Authors: Wolhuter, R.
Format: Thesis
Language:English
Published: Stellenbosch : University of Stellenbosch 2010
Subjects:
Forward Error Correction (FEC)
Dissertations > Electronic engineering
Theses > Electronic engineering
Artificial satellites
Artificial satellites in telecommunication
Artificial satellites > Control systems
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access_status_str Open Access
author Christelis, Christian
author2 Wolhuter, R.
author_browse Christelis, Christian
Wolhuter, R.
author_facet Wolhuter, R.
Christelis, Christian
author_sort Christelis, Christian
collection Thesis
dc_rights_str_mv University of Stellenbosch
description Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2010.
format Thesis
id oai:scholar.sun.ac.za:10019.1/4337
institution Stellenbosch University (South Africa)
language English
last_indexed 2026-06-10T12:45:58.010Z
license_str Other — see source repository
provenance_str_mv Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository
publishDate 2010
publishDateRange 2010
publishDateSort 2010
publisher Stellenbosch : University of Stellenbosch
publisherStr Stellenbosch : University of Stellenbosch
record_format dspace
source_str SUNScholar — Stellenbosch University Repository
spelling oai:scholar.sun.ac.za:10019.1/4337 Volumetric data throughput optimisation by dynamic FEC bearing frame length adaptation Christelis, Christian Wolhuter, R. University of Stellenbosch. Faculty of Engineering. Dept. of Electrical and Electronic Engineering. Forward Error Correction (FEC) Dissertations -- Electronic engineering Theses -- Electronic engineering Artificial satellites Artificial satellites in telecommunication Artificial satellites -- Control systems Thesis (MScEng (Electrical and Electronic Engineering))--University of Stellenbosch, 2010. ENGLISH ABSTRACT: The telecommunications link between a LEO satellite and a rural ground station with a non-tracking antenna, has a strongly varying link quality and a short communications window. The satellite acts as a store-and-forward node between ground stations. The TC-SDLP and an FTP protocol form a shallow protocol stack, which excludes unneeded protocol functionality and the resulting overhead. Coding gain, introduced by BCH FEC in the TCSDLP, allows for link quality improvement. The core of this thesis is an improvement of the TC-SDLP to maximise effective payload data throughput, or goodput. This improvement was achieved by creating an optimal segment length selection metric based on the BER. Since the BER is not determinable from within the TC-SDLP, the metric was twice determined; once based on the FER and finally based on time delays. The work includes an extensive background study, which consists of space standardisation, orbital physics, error detection and correction, space datalink protocols, data throughput and culminating in the protocol stack design. The project specific link budget calculation is presented. The optimal segment length policy was mathematically determined. Asimulation model of the TC-SDLP was used as a proof of concept for the effective throughput and give a performance benchmark. Finally a TC-SDLP implementation offers a real world performance demonstration. AFRIKAANSE OPSOMMING: Die telekommunikasie skakel tussen ’n lae aardomwenteling (LEO) sateliet en ’n plattelandse grondstasie met ’n nie-volg antenna, het ’n skakelkwaliteit wat in ’n groot mate varieer en ’n kort kommunikasievenster. Die sateliet tree op as ’n stoor- en- aanstuur node tussen grondstasies. Die TC-SDLP en ’n leêr oordrag protokol (FTP) vorm ’n vlak protokol stapel, wat onnodige protokol funksionaliteit en die gevolglike opkoste uitsluit. Kode aanwins, wat deur die BCH FEC in die TC-SDLP, aangebring word, verbeter die skakelkwaliteit. Die kern van hierdie tesis is ’n verbetering van die TC-SDLP om sodoende die ware deurvoer van nuttige vragdata te maksimimeer. Hierdie verbetering is bereik deur die skep van ’n optimale segmentlengte-seleksie metode gebaseer of die bit fout tempo (BER). Aangesien die BER nie bepaal kan word vanuit die TC-SDLP nie, is die maatstaf twee keer bepaal; die eerste keer is die bepaling gebaseer op die raamwerk fout tempo (FER) en die finale bepaling op tyd vertragings. Die tesis sluit ’n omvattende agtergrondstudie in, wat bestaan uit ruimte standardisering, wentelbaan fisika, die opspoor en regstel van foute, ruimte inligtingskakel protokol en deurstuur van data wat uitloop op die protokol ontwerp. Daar word aangedui hoe die berekening van die begroting vir die skakel van toepassing op die spesifieke projek, gedoen is. ’n Wiskundige analise van die optimale segmentlengte s ook gedoen. ’n Simulasie model van die TC-SDLP is gebruik as ’n bewys van die konsep vir die ware deurset en gee ’n prestasie maatstaf. Laastens bied die TCSDLP implementering ’n ware wereld prestasie demonstrasie. 2010-02-18T11:24:28Z 2010-08-13T15:01:46Z 2010-02-18T11:24:28Z 2010-08-13T15:01:46Z 2010-03 Thesis http://hdl.handle.net/10019.1/4337 en University of Stellenbosch 132 p. : ill. application/pdf Stellenbosch : University of Stellenbosch
spellingShingle Forward Error Correction (FEC)
Dissertations -- Electronic engineering
Theses -- Electronic engineering
Artificial satellites
Artificial satellites in telecommunication
Artificial satellites -- Control systems
Christelis, Christian
Volumetric data throughput optimisation by dynamic FEC bearing frame length adaptation
title Volumetric data throughput optimisation by dynamic FEC bearing frame length adaptation
title_full Volumetric data throughput optimisation by dynamic FEC bearing frame length adaptation
title_fullStr Volumetric data throughput optimisation by dynamic FEC bearing frame length adaptation
title_full_unstemmed Volumetric data throughput optimisation by dynamic FEC bearing frame length adaptation
title_short Volumetric data throughput optimisation by dynamic FEC bearing frame length adaptation
title_sort volumetric data throughput optimisation by dynamic fec bearing frame length adaptation
topic Forward Error Correction (FEC)
Dissertations -- Electronic engineering
Theses -- Electronic engineering
Artificial satellites
Artificial satellites in telecommunication
Artificial satellites -- Control systems
url http://hdl.handle.net/10019.1/4337
work_keys_str_mv AT christelischristian volumetricdatathroughputoptimisationbydynamicfecbearingframelengthadaptation

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