1. Community RF Sensing - Mobile Coverage Maps
www.mysignals.gr: This work builds Community RF Sensing for cellular mobile telephony, utilizing users' mobiles as sensors. Thus, mobile coverage maps are created by users themselves. Moreover, this work offers tools of immense importance for network engineers and researchers and at the same time offers an social and information tool about cellular telephony network. Thus, a complete Community RF Sensing platform is developed, serving diverse purposes. The system is designed to support a large number of user-sensors and could assist in city-wide evaluations of existing cellular telephony network deployments.
2. Localization of GSM base stations
Apart from the cellular network monitoring system by user themselves, the aforementioned work offered strong research incentives. For instance, we were able to systematically demonstrate the necessity of a dense network of cell towers, a basic principle of wireless communications that is not widely known. In this context, the idea of discovering the location of the unknown and unlisted cell tower locations emerged, which could also corroborate the development of GPS-free localization services. We utilized a vast amount of real data provided by the users of the MySignals iPhone App. The integration of a careful modeling of GSM network with non parametric state estimator offered promising results. Experimental Results on real-world measurements with absolute error on the order of 50m are reported. The idea already touched upon in "Community RF sensing" diploma thesis for public awareness of cellular mobile telephony is of immense importance since an extremely dense cellular tower network is the basic principle for the 5G wireless networks. Next generation mobile networks will achieve network speeds over 1 Gbps only if an extremely dense network of femtocells is established.
3. Cellular Telephony Monitoring Tools
In order to analyse in depth the cellular mobile network performance per region, we have developed several monitoring and analysis tools. For instance, user's RSS demonstration tool has developed. The network engineer-researcher can choose a specific location and retrieve the RSS level throughout the desired time interval.
4. Demonstration of Backscatter Networks for Large Scale Environmental Sensing
Environmental WSN demonstration tool and software infrastructure (under development).
5. Remote Sensor Network via GPRS
Semester Project, Course: Analysis and Design (Synthesis) of Telecom Modules. Click here to download the block diagram A WSN can be deployed remotely from a wired internet access and provide measurements feedback everywhere in the world using the cellular mobile telephony network and more specifically a GPRS module controlled and driven by a MCU 8051.
6. Artificial Intelligent agent for the reversi game
Semester Project, Course: Artificial Intelligence. A minimax implementation for the reversi game designed for the course of Artificial Intelligent. To achieve high execution speed the a-b pruning approach has been implemented."