Utjecaj vrste razdiobe vremena posluživanja na performanse internetskog čvora

master's thesis

• Title (english): Impact of Service Time Distribution on the Performances of Internet Node
• Author: Dino Adlešić
• Mentor: Marko Matulin (mentor)
• Committee member: Štefica Mrvelj (predsjednik povjerenstva)
• Committee member: Ivan Grgurević (član povjerenstva)
• Committee member: Dragan Peraković (član povjerenstva)
• Granter: University of Zagreb; Faculty of Transport and Traffic Sciences; (Division of Transport); (Department of Information and Communications Traffic); Zagreb
• Defense date and country: 2016-09-27, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Traffic and Transport Technology; Postal and Telecommunications Traffic

Abstract

U radu su analizirane performanse internetskog čvora neke višeuslužne mreže izražene
prosječnim vremenima čekanja i boravka u sustavu. Ulazni podaci simulacije generirani
su korištenjem dostupnih internetskih alata. Pri tom su korištene različite razdiobe za
opis vremena trajanja posluživanja paketa (normalna, eksponencijalna, konstantna i
Pareto). Ovisno o značajkama ulaznog toka te vremenu trajanja posluživanja, u analizi
performansi upotrjebljen je odgovarajući podvorbeni model 𝑀/𝐺/1. Za dane ulazne
podatke, rezultati ukazuju kako su najbolje performanse ostvarene za konstantnu
razdiobu i to zbog odsustva varijabilnosti duljine paketa, a samim time i trajanja
posluživanja. Osim toga, radom je pokazana važnost utjecaja pojedine razdiobe trajanja
posluživanja, budući da se dobiveni rezultati uvelike razlikuju iako su ostali parametri bili
približno jednaki za sve četiri razdiobe (broj analiziranih paketa, kapacitet odlaznog
linka, prosječna duljina paketa te prosječno prometno opterećenje).

Abstract (english)

The paper analyzes the performance of multi-service Internet node expressed by mean
waiting time and mean sojourn time. The data for the simulations were generated using
the available online tools. Different distributions have been used to describe the
distribution of packet service times (normal, exponential, constant and Pareto).
Depending on the characteristics of the input flow and service time, the appropriate
model 𝑀/𝐺/1 has been used for performance analysis. For a given input data, the
results show that the best performance is achieved by constant distribution of service
times due to the lack of variability in the lengths of the packages, and thus the service
time. In addition, the work shows the importance of each service time distribution as the
results obtained differ greatly even though the other parameters were approximately
equal for all four distributions (number of analyzed packets, output link capacity, average
packet length and average traffic load).

• Keywords: razdioba vremena posluživanja; ne-poissonovski podvorbeni sustavi; performanse internetskog čvora
• Keywords (english): service time distribution; non-Poisson queuing systems; performances of Internet node
• Language: croatian
• URN:NBN: urn:nbn:hr:119:917823
• Study programme: Title: Traffic and Transport; specializations in: Road Traffic and Transport, Railway Traffic and Transport, Water Traffic and Transport, Air Traffic and Transport, Postal Traffic, Information and Communication Traffic, Urban Traffic and Transport; Course: Information and Communication Traffic; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka prometa (magistar/magistra inženjer/inženjerka prometa)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2016-11-23 11:22:42