Performanse pokretne mreže s dinamičkom dodjelom resursa pristupne mreže

doctoral thesis

• Title (english): Performance of Mobile Network with Dynamic Allocation of Access Network Resources
• Author: Suad Kasapović; VIAF: 305638831
• Mentor: Ignac Lovrek (mentor)
• Committee member: Vjekoslav Sinković (član povjerenstva)
• Committee member: Ignac Lovrek (član povjerenstva)
• Committee member: Himzo Bajrić Himzo Bajrić (član povjerenstva); strani drzavljanin: Nije dostupno
• Committee member: Mladen Kos (član povjerenstva)
• Committee member: Robert Nađ (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; (Department of Telecommunications); Zagreb
• Defense date and country: 2007-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering; Telecommunications and Informatics
• Universal decimal classification (UDC): 621.3 - Electrical engineering

Abstract

U doktorskoj disertacije se vrši istraživanje performansi pokretne mreže s dinamičkom dodjelom resursa pristupne mreže. Istraživanje je izvedeno prvo na pokretnoj GSM mreži s dinamičkom podjelom resursa ćelijama mreže. Analizirana je vjerojatnost blokiranja i vjerojatnost prekidanja poziva u odnosu na broj korisnika u ćeliji. Nakon toga analiziran je heterogeni promet u pokretnoj GSM/GPRS mreži. Istraživane su performanse mreže u slučaju zahtjeva za jednim odsječkom ili više odsječaka a kao rezultat promatrani su slučajevi vjerojatnosti odbacivanja, propusnosti i vremena čekanja. Ono što je mijenjano je intenzitet i složenost dolaznog prometa tj. kakav je omjer usluga koje koriste jedan i više odsječaka i kolike su veličine poruka. Također je predstavljen i analitički model u slučaju složenog prometa s dinamičkim dodjelom resursa, od kojih jedan dio zahtjeva komutaciju kanala a drugi dio komutaciju paketa. U takvom scenariju, i uz ON/OFF model podatkovnog prometa vršena je simulacija za različite odnose usluga. Pri tomu, predloženim rješenjem je moguće i u slučaju više usluga odrediti perfromanse koje osjeća korisnik pojedinačno za svaku uslugu. Uz različite odnose složenosti promatranih usluga (npr. Web i WAP) moguće je znači predvidjeti performanse kao što su propusnost Web ili WAP korisnika, kašnjenje i iskorištenost podatkovnih kanala. Upravo to je urađeno modificiranim Engset modelom kojim se pokušava pojednostaviti predviđanje performansi sustava u slučaju ograničenih resursa i ograničenog broja korisnika. S ciljem prometnog inžinjerstva, predstavljen je metod pomoću koga je moguće pronaći broj podatkovnih kanala s fiksnom i dinamičkom dodjelom radijskih resursa. Dizertacija je i istražila mogućnosti primjene mehanizama za obezbjeđenje kvalitete usluge u pokretnoj mreži.

Abstract (english)

In this thesis we examined performance of mobile network with dynamic allocation of access network . First, research have done on mobile GSM network with dynamic allocation radio resources. As performance we analized blocking probability and droping probability. After that, we have analized heterogenuos traffic in the mobile GSM/GPRS networks. We have researched performance network in the case requirement for one time slot or more slots and as results we observed blocking probability, throughput and waiting time. As variable parameters was traffic intensity and composite of arrival traffic i.e. what is ratio services which use one and more time slots and how much message size. Also, this thesis have presented and analytic model in the case composite traffic with dynamic allocation resources, from which one part requiring circuit switching and other part packet switching. In that scenario, and with ON/OFF traffic model we have simulated it for different ratio of services. Moreover, with proposed solution we can decide performance of multiservices requirements which feeling user separately for each service. With different composition of observed services (e.g. Web and WAP) with this method we can estimate performance as throughput Web or WAP users, dealy and utilization data channels. Just it we made with modified Engset model with which we try simplify estimation performance of system in the case of limited resources and limited number of users. Additional, with goal traffic engineering we proposed method from which is possible to find number od requested data channels with dynamic allocation of resources. This thesis also, examined possibility uses mechanisms for ensure QoS in the mobile network that way that proposed two methods. One method is method scheduling resources using genetic algorithms and second one using DiffServ mechanism with criterion of revenue.

• Keywords: dinamička dodjela resursa; performanse pokretne mreže; vjerojatnost blokiranja; propusnost; kvaliteta usluge
• Keywords (english): dinamička dodjela resursa; performanse pokretne mreže; vjerojatnost blokiranja; propusnost; kvaliteta usluge
• Language: croatian
• URN:NBN: urn:nbn:hr:168:493343
• Study programme: Title: Doctoral study programme "Electrical Engineering and Computing"; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, po-dručje tehničkih znanosti (doktor/doktorica znanosti, po-dručje tehničkih znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2020-04-06 13:47:09