Communication satellite payload redundancy reconfiguration

Gülgönül, Şenol; Köklükaya, Etem; Ertürk, İsmail; Teşneli, Ahmet Yahya

doi:10.1109/estel.2012.6400090

Cited by 12 publications

(4 citation statements)

References 2 publications

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“…In [7] a recursive algorithm was proposed to perform a breadth-first-search (BFS) in order to find all feasible paths that connect channels to amplifiers. Experiments showed the efficiency of the proposed method on a small switch network.…”

Section: Related Workmentioning

confidence: 99%

Minimising longest path length in communication satellite payloads via metaheuristics

Stathakis

Danoy

Schleich

et al. 2013

Proceedings of the 15th Annual Conference on Genetic and Evolutionary Computation

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The size and complexity of communication satellite payloads have been increasing very quickly over the last years and their configuration / reconfiguration have become very difficult problems. In this work, we propose to compare the efficiency of three well-known metaheuristic methods to solve an initial configuration problem, which objective is to minimise the length of the longest channel path. Experiments are conducted on real-world problem instances with realistic operational constraints (e.g., a maximum computation time of 10 minutes) and Wilcoxon test is used to determine with statistical confidence what technique is more suitable and what are its limitations. The results of this work will serve as an initial step in our research to design hybrid approaches to push even further the solving capabilities, i.e., tackling bigger payloads and more channels to activate.

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Section: Related Workmentioning

confidence: 99%

Minimising longest path length in communication satellite payloads via metaheuristics

Stathakis

Danoy

Schleich

et al. 2013

Proceedings of the 15th Annual Conference on Genetic and Evolutionary Computation

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“…Akıllı Yedekleme Algoritmasının (AYA) tek giriş cihazı için uygulanması, makalenin yazarları tarafından bir bildiride sunulmuştur [2]. Bu yeni çalışmada, geliştirilen algoritmaya çoklu giriş cihazları için yedek yolların bulunması ile üzerinden geçilen anahtar sayısı ve kesinti sayısı kriterleri eklenmiştir.…”

Section: şEkil 2 R-tip Anahtar Pozisyonları (R-type Switch Positions)unclassified

“…Faydalı yük sistemi, Şekil 1'de gösterildiği gibi antenler, alıcılar, frekans düşürücüler, giriş çoklayıcıları, güçlendiriciler ve çıkış çoklayıcılarından oluşan karmaşık bir sistemdir [2]. Yeryüzünden uyduya gönderilen sinyaller, alış antenleri ile alınmaktadır.…”

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Aya: Haberleşme Uydusu Faydalı Yük Sistemi Akıllı Yedekleme Algoritması

Gülgönül¹,

Köklükaya²,

Ertürk³

et al. 2014

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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ÖZETHaberleşme uydusu faydalı yük sisteminde, cihazlar birbirine çok uçlu anahtarlar ile bağlanmaktadır. Arıza oluşması durumunda, anahtarların pozisyonları değiştirilerek yedek cihazlara bağlantı sağlanır. Uydu işletmeciliğinde, uygun anahtar pozisyonlarının hesaplanmasını gerektiren bu zor problemin çözümü için ticari yazılımlar kullanılmaktadır. Bu tez kapsamında geliştirilen Akıllı Yedekleme Algoritması (AYA), faydalı yük sisteminin iki matris ile modellendiği, yedek cihazlara giden yolların özyinelemeli olarak bulunduğu yeni bir algoritmadır. AYA'nın açık mimarisi ile her türlü faydalı yük şebekesi tanımlanabilmekte ve karşılaşılabilecek yedekleme problemleri çözülebilmektedir. AYA'nın uygulama sonuçları ve etkinliği, TÜRKSAT-3A uydusunun işletmesinde kullanılan ICAREF ticari yazılımı ile doğrulanmıştır. AYA, yüksek maliyetli ticari yazılımlara bir alternatif sunmaktadır. AYA, yedek cihazlara giden yolları bulurken diğer bağlantılarda oluşacak kesinti sayısı ve sinyalin üzerinden geçebileceği anahtar sayısı kriterlerini de dikkate alarak kısa sürelerde uygun çözümleri üretebilmektedir.Anahtar Kelimeler: Haberleşme uydusu, faydalı yük, yedekleme SRRA: SMART REDUNDANCY RECONFIGURATION ALGORITHM FOR COMMUNICATION SATELLITE PAYLOAD ABSTRACTRedundancy is provided by using multiport switches which are connecting equipment in communication satellite payload systems. In case of a failure, signal path is re-routed by changing suitable switch positions. Smart Redundancy Reconfiguration Algorithm (SRRA) is a novel algorithm, able to model any payload system and to find paths recursively to redundant equipment. Results of the SRRA are verified by means of comparing them to those of the ICAREF commercial software which is currently being used in TURKSAT-3A satellite operations. SRRA can find all paths connecting given input(s) to any output(s) by taking number of interruptions and number of switches crossed constraints into account.

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“…Besides, their solver offer no transparency which lead to a lack of flexibility. Similarly to these two commercial tools, Gulgonul et al [3] have also performed payload optimization by using a recursive path search algorithm. Finally, Simone et al [4] use pathfinding algorithms as well in order to obtain paths crossing a minimal number of switches and to minimize the use of some critical paths according to the physical architecture of the payload.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective evolutionary approach for the satellite payload power optimization problem

Kieffer

Stathakis

Danoy

et al. 2014

2014 IEEE Symposium on Computational Intelligence in Multi-Criteria Decision-Making (MCDM)

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Today's world is a vast network of global communications systems in which satellites provide high-performance and long distance communications. Satellites are able to forward signals after amplification to offer a high level of service to customers. These signals are composed of many different channel frequencies continuously carrying real-time data feeds. Nevertheless, the increasing demands of the market force satellite operators to develop efficient approaches to manage satellite configurations, in which power transmission is one crucial criterion. Not only the signal power sent to the satellite needs to be optimal to avoid large costs but also the power of the downlink signal has to be strong enough to ensure the quality of service. In this work, we tackle for the first time the bi-objective input/output power problem with multi-objective evolutionary algorithms to discover efficient solutions. A problem specific indirect encoding is proposed and the performance of three state-of-the-art multiobjective evolutionary algorithms, i.e. NSGA-II, SPEA2 and MOCell, is compared on real satellite payload instances.

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Communication satellite payload redundancy reconfiguration

Cited by 12 publications

References 2 publications

Minimising longest path length in communication satellite payloads via metaheuristics

Minimising longest path length in communication satellite payloads via metaheuristics

Aya: Haberleşme Uydusu Faydalı Yük Sistemi Akıllı Yedekleme Algoritması

Multi-objective evolutionary approach for the satellite payload power optimization problem

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