Bežična senzorska mreža temeljena na LoRa/LoRaWAN tehnologiji

master's thesis

• Title (english): Wireless Sensor Network Based on LoRa/LoRaWAN Technology
• Author: Ivan Spasić
• Mentor: Hrvoje Džapo (mentor)
• Committee member: Hrvoje Džapo (predsjednik povjerenstva)
• Committee member: Tomislav Pribanić (član povjerenstva)
• Committee member: Željka Lučev Vasić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2017-07-21, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U radu su ukratko opisane značajke LPWAN mreža te je obrađena opća problematika vezana uz projektiranje i implementiranje LPWAN mreža. Predstavljene su neke LPWAN mrežne tehnologije koje trenutno postoje na tržištu, između kojih je i LoRa. Prikazan je opis mehanizama na kojima se temelji LoRa tehnologija i načina na koje se pomoću LoRa tehnologije može ostvariti visoka osjetljivost radioprijemnika. Također, prikazan je osvrt na neke loše strane LoRa tehnologije, poglavito na nemogućnost postizanja većih podatkovnih brzina. Potom je opisan LoRaWAN protokol koji se nadovezuje na fizički sloj LoRa modulacije. Opisana je topologija tipične LoRaWAN mreže te je dan opis triju mogućih načina rada LoRaWAN uređaja. Također je opisana struktura paketa koju propisuje LoRaWAN specifikacija, nakon čega su predstavljena neka ograničenja koja uvodi korištenje ISM frekvencijskog područja. Prikazane su implementacije LoRaWAN mreža u praksi, pri čemu su spomenuta neka komercijalno dostupna rješenja u vidu gotovih gateway uređaja i LoRa razvojnih platformi. Detaljno je opisana demonstracijska implementacija jednostavne LoRaWAN bežične mreže razvijena u ovom radu.

Abstract (english)

In this thesis, a brief overview of LPWAN networks and general requirements for design and implementation of LPWAN networks were presented. Some existing LPWAN network technologies were presented, along with LoRa as one of them. The mechanisms behind LoRa technology, enabling the high sensitivity of LoRa RF receivers, were described. Moreover, some shortcomings of LoRa technology were addressed, namely the inability to achieve high data transfer speeds. Furthermore, LoRaWAN protocol built on top of LoRa modulation physical layer was described. The topology of LoRaWAN network was described, along with three possible modes of operation of LoRaWAN devices. The structure of LoRaWAN packets was described and some restrictions resulting from the use of ISM RF band. LoRaWAN networks practical implementations were described, with reference to commerically available solutions of gateways and LoRa development platforms. Demo platform of simple LoRaWAN wireless network developed in this thesis was described in details.

• Keywords: LoRa; ISM; CSSS; LPWAN; LoRaWAN; gateway; krajnji uređaj; koncentrator; SX127x; SX1301; SX125x; IoT; MQTT
• Keywords (english): LoRa; ISM; CSSS; LPWAN; LoRaWAN; gateway; node; concentrator; SX127x; SX1301; SX125x; IoT; MQTT
• Language: croatian
• URN:NBN: urn:nbn:hr:168:415277
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-14 00:52:26