Your browser does not support JavaScript!

Home    Collections    Type of Work    Post-graduate theses  

Post-graduate theses

Current Record: 19 of 5933

Back to Results Previous page
Next page
Add to Basket
[Add to Basket]
Identifier 000451481
Title ComDEX : a context-aware federated platform for IoT-enhanced communities
Alternative Title ComDEX : μια κατανεμημένη πλατφόρμα με επίγνωση συμφραζομένων για κοινότητες που χρησιμοποιούν το διαδίκτυο των πραγμάτων.
Author Παπαδάκης, Νικόλαος Λ.
Thesis advisor Μαγκούτης, Κωνσταντίνος
Reviewer Μπουλουκάκης, Γεώργιος
Πλεξουσάκης, Δημήτριος
Abstract This thesis presents ComDEX, a context-aware federated architecture and IoT platform for enabling data exchange between IoT-enhanced communities. Today, smart communities are highly heterogeneous and siloed as they can offer IoT applications and services only to their local community inhabitants. Though some aspects of the creation of an ideal context-aware IoT platform for smart communities can be covered by existing technologies, a solution in a federation of brokers that fully addresses the needs of a smart IoT community, as well as the solutions proposed for individual smart spaces, has not yet been properly defined. ComDEX relies on property graphs to represent smart community entities that include highlevel context-based information (occupancy of rooms, etc.) and are automatically mapped to context-aware publish/subscribe messages. Such messages can be discovered and exchanged between communities via a hierarchical federated topology and an advertisement-based mechanism. The ComDEX prototype is implemented using well-known IoT technologies such as MQTT and NGSI-LD. In order to include existing smart buildings for future experiments, an NGSI-LD smart data model for smart spaces and devices was created to include missing entities like rooms and to properly create their relationships. Τo enable the quick generation of realistic NGSI-LD compatible building data, we built a parsing tool that converts IFC-standardized building information to our extended NGSI-LD entities. Finally, ComDEX is evaluated using a realistic smart port scenario and compared against different federation topologies. The experimental results demonstrate that the approach presented in this thesis outperforms existing HTTP-based solutions in IoT scenarios with synthetically generated workloads, with low impact in larger deployments where the number of hops between brokers in the federation increases.
Language English
Subject Distributed systems
Smart cities
Έξυπνες πόλεις
Κατανεμημένα συστήματαα
Issue date 2022-12-02
Collection   School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses
  Type of Work--Post-graduate theses
Permanent Link https://elocus.lib.uoc.gr//dlib/d/c/0/metadata-dlib-1665216852-666924-2972.tkl Bookmark and Share
Views 22

Digital Documents
No preview available

No permission to view document.
It won't be available until: 2023-12-02