Spreminjanje parametrov mobilnega omrežja za boljše delovanje terminalov

HUDOKLIN, ROK (author), Humar, Iztok (mentor)

V sklopu diplomskega dela sem analiziral in spreminjal spodaj omenjene parametre na bazni postaji, z namenom preučevanja odzivov terminala, zaradi storjenih sprememb. Podrobneje sem si pogledal naslednje parametre, ki so: izbira celice (ang. Cell selection), dostop (ang. Access), tehnologijo neprekinjenega klica SRVCC (ang. Single Radio Voice Call Continuity), združevanje nosilcev (ang. Carrier aggregation) in uravnavanje prometa (ang. Load balancing). Namen dela je bilo izboljšati prenosno hitrost z združevanjem nosilcev, optimizirati raven signala in dosegljivost uporabnika z izbiro celice, pravilno prerazporediti obremenitve na celice, ki so manj obremenjene in ponujajo več kapacitet, z namenom izboljšanja uporabniške izkušnje in razbremenjevanja omrežja. Praktično delo sem nadaljeval na izbrani lokaciji, tj. Šmartno pri Litiji. Meritve sem opravljal s pomočjo merilne opreme Anite, programskega orodja Nemo in različnih telefonov, ki so podatke zajemali. Omenjena oprema je vgrajena v avto, s čimer so meritve dale rezultat po cestah in ulicah, kjer sem vozil. Te podatke sem naložil na razvojno orodje Analyze in videl stanje omrežja v času meritve. Sestavil sem konfiguracijo testa in delovanje ustrezno testiral na testni bazni postaji. Tam sem imel dostop do vseh parametrov, med drugim tudi do načina delovanja združevanja nosilcev, tako da sem te ustrezno korigiral ter s pomerjanjem in primerjanjem videl odvisnosti ene do druge nastavitve. Z dobljenimi rezultati sem spisal poročilo, v katerem sem zajel ključne ugotovitve in predloge za pravo omrežje, v tem primeru Šmartno pri Litiji. S prilagoditvijo parametrov na lokaciji sem dosegel robustnejše delovanje terminala. Prikazal sem različne primere uporabe omrežja in nastavitve, s katerimi jih izboljšamo. S testiranjem tehnologije združevanja nosilcev sem prikazal vpliv ravni signala na dobljeno prenosno hitrost. Z upoštevanjem delovne karakteristike terminala sem podal nasvete za izboljšanje te hitrosti na terenu. Glede nastavitve bazne postaje na lokaciji sem pričakoval, da bo optimizacija zadovoljiva, ampak se lahko v nadaljevanju še izboljša. Izkazalo se je prav to, možnosti za izboljšavo so bile, a se te razlikujejo glede na posameznikovo uporabo. Pričakoval sem, da bo tehnologija uravnavanja prometa delovala ustrezno in bo uporabnika premestila na drugo celico takrat, ko ga mora, tj., ko je celica nasičena. Delovanja uravnavanja prometa mi, žal, ni uspelo dokazati, saj je bila zasedenost BP v času merjenja zgolj 20-odstotna.

• Language: Slovenian
• Keywords: parameter, optimizacija, testiranje
• Work type: Bachelor thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2023
• PID: 20.500.12556/RUL-150904
• COBISS.SI-ID: 166260483
• Publication date in RUL: 25.09.2023

Secondary language

• Language: English
• Title: Changing mobile network parameters for better terminal performance

Abstract

As part of my diploma, I analyzed and changed the parameters mentioned below on the base station, with the aim of studying the responses of the terminal due to the changes made. I took a closer look at the following parameters, which are: cell selection, access, SRVCC (Single Radio Voice Call Continuity), carrier aggregation and regulation traffic (Load balancing). The purpose of the work was to improve transmission speed by combining carriers, optimize signal level and user reachability by cell selection, correctly redistribute loads to cells that are less loaded and offer more capacity, with the aim of improving the user experience and relieving the network. I continued the practical work at the selected location, i.e. Šmartno pri Litiji. I performed the measurements with the help of the Anita measuring equipment, the Nemo software tool and various phones that captured the data. The mentioned equipment is built into the car, so the measurements gave the result on the roads and streets where I drove. I uploaded this data to the Analyze development tool and saw the state of the network at the time of the measurement. I put together a test configuration and properly tested the operation on a test base station. There I had access to all the parameters, including the mode of operation of the grouping of carriers, so I corrected them accordingly and saw the dependencies of one setting on another by comparing and contrasting. With the obtained results, I wrote a report in which I included key findings and suggestions for a real network, in this case Šmartno pri Litiji. By adjusting the parameters at the location, I achieved a more robust operation of the terminal. I have shown various examples of network usage and settings to improve them. By testing the carrier combining technology, I demonstrated the influence of the signal level on the obtained transmission speed. Taking into account the operating characteristics of the terminal, I have given tips to improve this speed in the field. Regarding the base station setup at the site, I expected the optimization to be satisfactory, but it can be further improved. It turned out to be just that, there were opportunities for improvement, but these differ depending on the individual's use. I expected the traffic management technology to work properly and move the user to another cell when it needs to, i.e. when the cell is saturated. Unfortunately, I was not able to demonstrate the operation of the traffic regulation, as the occupancy of the base station was only 20% at the time of measurement.

• Keywords: parameter, optimization, testing