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| Identifier |
000421776 |
| Title |
Coexistence of IEEE 802.15.4g and LoRa Networks at 868 MHz band, PHY layer analysis and evaluation |
| Alternative Title |
Συνύπαρξη των ΙΕΕΕ 802.15.4g και LoRa Δικτύων στην 868 MHz περιοχή συχνοτήτων, ανάλυση και αξιολόγηση των φυσικών επιπέδων |
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Author
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Καραμολέγκος, Νικόλαος Χ.
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Thesis advisor
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Δημητρόπουλος, Ξενοφώντας
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Reviewer
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Τσακαλίδης, Παναγιώτης
Παπαδοπούλη, Μαρία
Παπαδάκης, Στέφανος
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| Abstract |
Internet of Things (IoT) refers to a network of connected physical objects
that can communicate. Thanks to cheap processors and wireless networks,
it’s possible to turn anything, from a lightbulb to a building, into part of the
IoT. Therefore, the most important challenge is the development of wireless
protocols that are characterized by low power and long range. Since the
introduction of the IoT paradigm, many technologies have been developed in
order to support this venture. However, the Low Power Wide Area Networks
(LPWANs) appear to be the most promising solution.
In this thesis, we focus our interest on two of these protocols: the IEEE
802.15.4g and the Long Range (LoRa). The LoRa protocol is based on spread
spectrum modulation and is characterized by low data rate. On the other
hand, IEEE 802.15.4g is based mainly on Frequency Shift Keying (FSK)
modulation and has higher data rate. Both protocols are operating at the
same frequency band which leads to mutual interference.
The main objective of this work is to evaluate the Physical (PHY) layers
of IEEE 802.15.4g and LoRa and to estimate the effect of the interference
to the performance of these two protocols. Also, we suggest solutions and
configurations to mitigate the interference and enhance the performance of
each protocol. In order to do so, we firstly, implemented a PHY simulator in
MATLAB and, secondly, we built a testbed with LoRa and IEEE 802.15.4g
devices to verify the results.
Furthermore, we investigated the range and the Received Signal Strength
Indication (RSSI) of the IEEE 802.15.4 protocol in the FORTH outer area in
order to create coverage maps and to calculate the area’s path loss exponent.
Finally, we propose a way to build a multi protocol Gateway (GW) which
can serve LoRa and IEEE 802.15.4g at the same time based on a Software
Defined Radio (SDR) transceiver which was implemented for each protocol.
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| Language |
English |
| Issue date |
2019-03-29 |
| Collection
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School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses
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Type of Work--Post-graduate theses
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| Permanent Link |
https://elocus.lib.uoc.gr//dlib/e/e/3/metadata-dlib-1553163803-508795-3957.tkl
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| Views |
536 |
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