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001-es BibID:	BIBFORM056041
Első szerző:	Kuki Attila (informatikus, matematikus)
Cím:	Investigating the effect of network service breakdown in multilayered cognitive communication system / Kuki Attila, Bérczes Tamás, Almási Béla, Sztrik János
Dátum:	2014
Megjegyzések:	In this paper a finite source retrial queueing modelis considered to study the performance measures of a communication network subject to random system breakdowns. The sources of the queueing model represent the communication entities, which are divided into two groups: The first group of sources is the class of "Intelligent items", where the items are able to sense and get information about the condition of the network environment, and so they are able to retry the started processing request in the case of special network communication issues. The second class is the "Dummy sources"(e.g. automated equipements), where the source item starts the network communication, but is not able to sense the changes in the network conditions, so it is unable to retry the transmission in the case of any errors.A novel Markovian model is constructed focusing on thequestion how the breakdowns of the communication networkinfluence the system's performance assuming that the service are divided into 3 successive steps, ie. the Service Unit has 3 servers representing the functionality of different network layers. At a time only one request can be under processing.The main interest of the present paper is to investigate themain steady-state performance measures of the system in case of different distributions of service times (Erlang, hipo-exponential, and exponential). To obtain the results the MOSEL (MOdeling, Specification and Evaluation Language) tool is used to formulate and solve the model. At the end of the paper several sample numerical examples will be shown illustrating the effect of the server's failure rate, for example on the mean number of entities in the queue, mean orbit size, mean response time for "Intelligent" items.
ISBN:	978-1-4799-7280-7 (electronic) 978-1-4799-7279-1 (USB) 978-1-4799-7281-4 (PoD)
Tárgyszavak:	Műszaki tudományok Informatikai tudományok tanulmány, értekezés cognitive infocommunication Hálózatok modellezése és analízise
Megjelenés:	5th IEEE International Conference on Cognitive Infocommunications CogInfoCom 2014 : Proceedings, Vietri sul Mare, Italy / ed. Péter Baranyi. - p. 237-241. -
További szerzők:	Bérczes Tamás (1975-) (informatikus) Almási Béla (1966-2015) (informatikus, matematikus) Sztrik János (1953-) (informatikus, matematikus)
Pályázati támogatás:	TÁMOP-4.2.2.C-11/1/KONV-2012-0001 TÁMOP Hálózatok modellezése és hatékonyságvizsgálatai
Internet cím:	DOI Szerző által megadott URL Intézményi repozitóriumban (DEA) tárolt változat
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