Izrada programske podrške za S-CSCF komponentu IMS sustava

master's thesis

• Title (english): Software of the S-CSCF Component in IMS
• Author: Filip Čajko
• Mentor: Željko Ilić (mentor)
• Committee member: Željko Ilić (predsjednik povjerenstva)
• Committee member: Gordan Šišul (član povjerenstva)
• Committee member: Krešimir Pripužić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2015-07-01, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

LTE je najnovije rješenje ponuđeno kao odgovor na najnovije zahtjeve na mobilne mreže. Arhitektura LTE mreže pruža značajna poboljšanja performansi u pogledu pojednostavljenja mrežne arhitekture, povećanja kapaciteta te brzine. Puštanje u pogon i održavanje LTE mreže jeftinije je u odnosu na ostale tehnologije, što znači da mobilni operateri mogu pružiti bolju uslugu po nižoj cijeni. Zahvaljujući novoj tehnologiji korištenoj u pristupnom sloju LTE mreža ima bolja svojstva skalabilnosti.
IMS, dio LTE-a, je globalna arhitektura koja pruža različite multimedijske usluge krajnjim korisnicima koristeći protokole bazirane na Internetu. IMS totalno napušta model komutacije kanala i prelazi na model komutacije paketa. Model komutacije paketa nudi bolje iskorištenje mrežnih resursa jer ne zahtijeva konstantnu rezervaciju resursa.
S-CSCF je entitet unutar IMS-a. Preciznije, on je žarišna točka IMS-a i ima mnogo odgovornosti kao na primjer, obrade registracije korisničke opreme, obrade zahtjeva za re-registracijom i de-registracijom, donošenja odluka o usmjeravanju, održavanju stanja sesija te pohranu i promjenu korisničkih profila. Tijekom rada, S-CSCF komunicira s ostalim entitetima unutar IMS-a koristeći dva glavna komunikacijska protokola: SIP i Diameter.
Analiza opterećenja razvijene programske podrške za S-CSCF komponentu, koja je bila i glavni cilj ovog diplomskog zadatka, izvršena je u okruženju koje pruža stvarne uvjete u kojima je mrežni promet nezaštićen od raznih smetnji. Za generiranje testnog prometa korišten je model linearne distribucije sa dvije različite postave parametara. Analiza rezultata prezentirana je pomoću grafova i napravljena je usporedba obje postave.

Abstract (english)

LTE is latest solution provided as answer to new requirements on mobile networks. LTE architecture provides meaningful performance improvements in shape of network architecture simplification, increased network capacity and speed. LTE network architecture is also cheaper to deploy and maintain, which means that performance of services provided by mobile operator will be better, and charges for users will be lower. New technology used in access domain of LTE (eNodeBs) enables easy scalability of network as traffic increases.
As part of LTE, IMS (IP Multimedia Subsystem) is global architecture which provides various types of multimedia services to end-users using Internet-based protocol. It completely abandons CS (circuit switch) network model and relies on PS (packet switch) model. PS model provides more efficient network usage since there is no more constant resource reservation and the usage is volume-based rather than time-based.
S-CSCF (Serving Call Service Control Function) is entity within IMS. More precisely, it is a focal point of IMS and it has a lot of responsibilities, such as, handling UE (user equipment) registration, de-registration and re-registration processes handling, making routing decisions, maintaining session states, storing and updating service profiles. While operating, S-CSCF communicates with other entities in IMS using two main protocols: SIP (Session Initiation Protocol) and Diameter protocol.
Load analysis of developed software for S-CSCF component, as main goal of this master thesis, was executed in industrial environment which provided real-life conditions where the network traffic was open to various transmission interferences. As traffic generator, linear distribution model was used with two different setups. Analysis results were represented using graphs and comparison between both setups was given.

• Keywords: IMS; LTE; S-CSCF; software; HSS; SIP; Diameter
• Keywords (english): IMS; LTE; S-CSCF; programska podrška; HSS; SIP; Diameter
• Language: english
• URN:NBN: urn:nbn:hr:168:758476
• Study programme: Title: Computing; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka računarstva (magistar/magistra inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2018-02-06 08:15:42