National Repository of Grey Literature 3 records found  Search took 0.00 seconds. 
Economical LoRaWAN security device
Varhola, Oliver ; Zeman, Václav (referee) ; Škorpil, Vladislav (advisor)
This master thesis contains a proposal of the solution for economical and energy saving security device with its communications part in a LoRaWAN network. Theoretical part of the thesis describes the most widespread LPWAN networks, i.e. the networks for low-power devices, such as NB-IOT based on LTE technology, Sigfox and LoRaWAN. Also briefly analyses security threats in case of the interference exploitation of the communication channel and describes LoRaWan security in detail. In the practical part there is hardware, power, mechanical solution implemented including the cover of the device. Realization of the software part covers, which types of events should be operated, power saving methods and mesage sending inverval are described. All requirements were implemented at application layer utilizing - LoRaWAN network server and virtual machine applications: MQTT broker, NoreRED, OpenHAB and cloud database InfluxDB with visualisation of the data in Grafana application.
Ethernet OAM for access networks diversity control
Varhola, Oliver ; Grenar, David (referee) ; Slavíček, Karel (advisor)
The Bachelor's thesis describes Ethernet access networks and the specifics of the telecommunication Ethernet Service with a focus on Diversity access. Ethernet OAM (Operation, Administration and Management) link layer protocols IEEE 802.1ag and 802.3ah are described, implemented and tested. Suggested use of OAM for verification of Diversity Single Point of Failure (SPOF) trial is conducted by utilizing Link Trace Message / Link Trace Response (LTM/LTR). Simulation using GNS3 emulator is performed in order to capture Link Layer (L2) traceroute to neighboring MIPs and MEPs (Maintenance Intermediate Points and Maintenance End Points). The resulting traceroute path containing MAC addresses of the ports through which the frame was sent is recorded, analyzed and compared with a sibling diverse circuit. If MAC addresses are equal or from a close range it indicates that the circuits may pass through the same device and thus a potential SPOF is detected.
Ethernet OAM for access networks diversity control
Varhola, Oliver ; Grenar, David (referee) ; Slavíček, Karel (advisor)
The Bachelor's thesis describes Ethernet access networks and the specifics of the telecommunication Ethernet Service with a focus on Diversity access. Ethernet OAM (Operation, Administration and Management) link layer protocols IEEE 802.1ag and 802.3ah are described, implemented and tested. Suggested use of OAM for verification of Diversity Single Point of Failure (SPOF) trial is conducted by utilizing Link Trace Message / Link Trace Response (LTM/LTR). Simulation using GNS3 emulator is performed in order to capture Link Layer (L2) traceroute to neighboring MIPs and MEPs (Maintenance Intermediate Points and Maintenance End Points). The resulting traceroute path containing MAC addresses of the ports through which the frame was sent is recorded, analyzed and compared with a sibling diverse circuit. If MAC addresses are equal or from a close range it indicates that the circuits may pass through the same device and thus a potential SPOF is detected.

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