Analiza prometa poruka protokola Diameter na sučeljima S6a i S6d u 3GPP LTE mrežama

master's thesis

• Title (english): Traffic analysis of Diameter protocol messages on S6a and S6d interfaces in 3GPP LTE Networks
• Author: Toni Smoljo
• Mentor: Željko Ilić (mentor)
• Committee member: Željko Ilić (predsjednik povjerenstva)
• Committee member: Marin Šilić (član povjerenstva)
• Committee member: Gordan Šišul (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2018-07-04, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

Ovaj diplomski rad obrađuje signalni promet, temeljen na protokolu Diameter, koji se odvija na komunikacijskim sučeljima S6a i S6d. Prvo je prikazana detaljna arhitektura mobilnih mreža zajedno sa svim komponentama i njihovim funkcionalnostima. Također, objašnjava se detaljno protokol Diameter. U sklopu toga prikazana je i objašnjena struktura signalizacijskih poruka protokola Diameter. Također predstavljene su različite vrste komunikacijskih čvorova temeljenih na ovom protokolu, te su prikazane njihove funkcionalnosti.
S ciljem provođenja analiza signalizacijskog prometa na sučeljima S6a i S6d stvorene su dvije različite aplikacije. Diameter routing agent (DRA) koji je korišten za provođenje analize poruka protokola Diameter, te njihovo usmjeravanje na druge komponente u mreži. DRA nam je omogućio manipuliranje sadržajem poruka protokola Diameter, te prikupljanje svih potrebnih informacija za analizu prometa. Drugi softver je bio Diameter node simulator koji je razvijen za potrebe simulacija funkcionalnosti dviju različitih mrežnih komponenti. To su Mobile Management Entity (MME) i Serving GPRS Support Node (SGSN). Uz to, ovaj softver nam omogućuje stvaranje signalizacijskog prometa protokola Diameter na temelju linearne ili Poisson-ove distribucije, te mogućnost slanja velikog broja zahtjeva u vremenskim intervalima.
Uz pomoć ove dvije aplikacije i postojećeg IP Multimedia Subsystem (IMS) testnog okruženja, uspješno smo simulirali događaje u stvarnom vremenu s signalizacijskim prometom protokola Diameter na sučeljima S6a i S6d. Naposljetku smo uspješno proveli analizu nad prikupljenim informacijama signalizacijskog prometa.

Abstract (english)

This master thesis explains signalling traffic of Diameter protocol on communication interfaces S6a and S6d. Firstly it shows detailed mobile networks architectures along with their components and their functionalities. Diameter protocol is also explained in detail. Structure of Diameter messages is presented and explained. Also, different types of Diameter nodes were presented, and its functionalities shown.
For the purpose of performing analysis on interfaces S6a and S6d two different applications were created. Diameter routing agent (DRA) which was used to parse Diameter messages and route them to other components. DRA also offered us to manipulate contents of Diameter messages and collect needed information for traffic analysis. Other software was Diameter node simulator which was developed to simulate functionalities of two different components. Those are Mobile Management Entity (MME) and Serving GPRS Support Node (SGSN). It offers possibilities of generating diameter traffic based on linear or Poisson distribution and ability to send loads of requests in intervals.
Using these two applications and existing IP Multimedia Subsystem (IMS) testing environment we successfully simulated real-time events in Diameter signalling traffic on interfaces S6a and S6d and managed to perform Diameter traffic analysis.

• Keywords: Long Term Evolution; LTE; IP Multimedia Subsystem; IMS; Diameter; Diameter Routing Agent; analiza prometa protokola Diameter; sučelje S6a; sučelje S6d
• Keywords (english): Long Term Evolution; LTE; IP Multimedia Subsystem; IMS; Diameter; Diameter Routing Agent; Diameter traffic analysis; interface S6a; interface S6d
• Language: english
• URN:NBN: urn:nbn:hr:168:796394
• Study programme: Title: Information and Communication Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije (magistar/magistra inženjer/inženjerka informacijske i komunikacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-14 00:49:00