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Title Comparison Study and Product Development using Wireless Narrowband Low-power Wide-area Network Technologies
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Discipline/Department Information and Communication Technology (ICT)
University/Publisher KTH
Abstract Nowadays it is more clear that the Internet of things (IoT) is not a transient trend but a completely new industry. The internet of things has the capability to enhance current industries (Industry 4.0), as well as to help protecting the environment and people. The latter is the case with the system developed and described in this thesis. The possibilities that IoT brings are due to the interconnection of heterogeneous embedded devices to the internet. This thesis focus on LPWANs (Low Power Wide Area Networks), which is a new set of technologies specifically design for the needs of IoT devices.Due to the recent deploy of NB-IoT (Narrow Band IoT) networks it has become more difficult to know what LPWAN is best for a certain application. Thus, the first half of this thesis involves the comparative study of NB-IoT and LoRaWAN LPWANs. This comparison required an in depth study of each technology, specially on the physical and datalink layers. The comparison briefly displays the main characteristics of each technology and explain the main conclusions in a concise manner. The second part of the thesis describes the development of a GNSS tracker. This tracker will be used on train wagons carrying goods that are dangerous for people and the environment. This thesis report describes the different steps taken, from the requirement specification to the partial development of the software.
Subjects/Keywords Internet of Things; Low Power Wide Area Networks; LoRa; NB-IoT; GNSS; PCB Design; Software Design.; Electrical Engineering, Electronic Engineering, Information Engineering; Elektroteknik och elektronik
Language en
Country of Publication se
Record ID oai:DiVA.org:kth-227857
Repository diva
Date Indexed 2020-01-03

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…because LoRa and NB-IoT have different power regulations in Europe, directly related with the spectrum in which they operate. The challenge to compare the two technologies is located at the device sensitivity, since it follows the equation 1: S = 10 log10…

…x28;kT B) + C + NF N (2.1) CHAPTER 2. PHYSICAL LAYER (1) Transmission power (2) Device sensitivity = (1)-(2) Link Budget 9 NB-IoT (Downlink) 35 dBm - 127.6 dBm 162.6 dB NB-IoT…

…LoRa module and the Sara N2 [15] module for NB-IoT. The power calculations are kept in Annex A. The obtained consumption per message is 0.7337 mW/h for NB-IoT and 0.05714 mW/h for LoRa. LoRa spends 12 times less power than NB-IoT for sending a…

…single message. There are two causes for this great difference. The first one is that an NB-IoT module consumes 5 times more power when transmitting. The second one is that NB-IoT has a preliminary synchronization and resource allocation phase. This…

…unlicensed (LoRa) spectrum, as well as the power consumption. LoRa benefits in this regard due to its simpler protocol scheme, which does not require as much steps to initialize a transmission as with NB-IoT. 3. Datalink Layer The Datalink layer…

power limit, and having a directional antenna with some gain at the base station would lead to asymmetrical links where downlink transmissions may not be reachable by the end device. The outcome is that NB-IoT simulations use three sectors per site…

…the nature of low power wide area networks to offer rather limited data rates. Both LoRa and NB-IoT were designed for short messages with a long time span between each transmission. In this context it is assumed that a transmission can take place…

…this thesis, the development of a GNSS tracker. 1.4 Scope The scope of this comparison includes the review of LoRa and NB-IoT technologies. This two technologies where chosen because they are the most popular ones at the moment of doing this thesis…

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