Mjerenje i analiza performansi usluge YouTube u pokretnoj mreži

undergraduate thesis

• Title (english): Measurement and Analysis of YouTube Performance in a Mobile Network
• Author: Marina Šolčić
• Mentor: Lea Skorin-Kapov (mentor)
• Committee member: Lea Skorin-Kapov (predsjednik povjerenstva)
• Committee member: Mirko Sužnjević (član povjerenstva)
• Committee member: Ivan Slivar (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2017-07-10, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Usluga YouTube koristi prilagodljivo strujanje putem protokola HTTP. Parametri na kojima usluga može raditi prilagodbu su broj okvira u sekundi, rezolucija i kvantizacija. Temeljna svrha prilagodljivog strujanja je mijenjanje kvalitete videa tijekom reproduciranja istoga, ovisno o izmjerenoj širini prijenosnog pojasa i popunjenosti spremnika, zbog izbjegavanja zaustavljanja reprodukcije, koje ima najveći degradirajući učinak na iskustvenu kvalitetu. Cilj ovoga rada je pokazati ovisnost početnog kašnjenja, zaustavljanja reprodukcije videa i promjene kvalitete reproduciranog videa o danu u tjednu te satu u danu. U tu svrhu, rađena su mjerenja svakog dana u tjednu od 7 sati do 23 sata, na svaki puni sat, prilikom kojih se reproducirao skup od 10 videa. Prikupljeni podaci su analizirani i opisani.

Abstract (english)

The YouTube Service is based on HTTP adaptive streaming. Parameters which the service can adapt are frames per second, resolution and quantization. The fundamental purpose of HTTP adaptive streaming is to dynamically adapt the video quality during playback, in accordance with measured bandwidth and buffer state. The primary aim is to avoid stalling, which has been shown to have the most degrading effect on Quality of Experience. The goal of this thesis is to determine the dependency of initial delay, stalling, and quality adaptation of a played video on a given day of the week and hour in a day. For that purpose, measurements were performed each day of the week, hourly from 7am to 11pm. One measurement includes streaming of 10 different videos. Collected data is analyzed and described.

• Keywords: YouTube; iskustvena kvaliteta; HTTP prilagodljivo strujanje; MPEG-DASH; početno kašnjenje; zaustavljanje videa; promjene kvalitete
• Keywords (english): YouTube; Quality of Experience; HTTP Adaptive Streaming; MPEG-DASH; initial delay; stalling; quality adaptations
• Language: croatian
• URN:NBN: urn:nbn:hr:168:142092
• Study programme: Title: Computing; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-14 01:21:33