@conference {
	title = {Optimization and Resource Management in NOMA Wireless Networks Supporting Real and Non-real Time Service Bundling},
	author = {Vamvakas, Panagiotis, Tsiropoulou, Eirini Eleni., Papavassiliou, Symeon., Baras, John S.},
	year = {2017},
	month = {07/2017},
	abstract = {In this paper, the problem of joint users{\textquoteright} uplink transmission power and rate allocation in NOMA wireless networks is studied, under the scenario that each user is simultaneously requesting multiple services. Each user is associated with a twovariable utility function that represents his satisfaction from his allocated resources (i.e., power and rate). In order to appropriately reflect the combined needs of the user for bundling different types of services under the same common umbrella, user{\textquoteright}s utility function consists of two parts while different percentages are adopted by each user for each part in order to express his need for real and nonreal-time services. The joint resource allocation problem is directly confronted as a two-variable optimization problem and formulated as a non-cooperative game. The theory of S-modular multivariable games is adopted towards determining the Nash equilibrium point of the game. A distributed, iterative and low complexity algorithm for computing game{\textquoteright}s Nash equilibrium is introduced, while updating user{\textquoteright}s uplink transmission power and rate at the same step. Detailed numerical results exhibit the ability of the proposed framework to simultaneously satisfy diverse multiple services requested by the same user.},
	address = {Crete, Greece},
	booktitle = {22nd IEEE Symposium on Computers and Communication (ISCC 2017)},
	pages = {pp. 699-705}
}
@conference {
	title = {Interest, Energy and Physical-Aware Coalition Formation and Resource Allocation in Smart IoT Applications},
	author = {Tsiropoulou, Eirini Eleni., Paruchuri, S.T, Baras, John S.},
	year = {2017},
	month = {03/2017},
	abstract = {In this paper, the problem of coalition formation among Machine-to-Machine (M2M) communication type devices and the resource management problem is addressed. Each M2M device is characterized by its energy availability, as well as by differentiated interests to communicate with other devices based on the Internet of Things (IoT) application that they jointly serve. Physical ties among devices also exist based on their physical distance proximity and communication channel quality. Those three factors: energy availability, interest, and physical ties, are considered into the coalition formation process and the coalition-head selection. Each M2M device is associated with a holistic utility function, which appropriately represents its degree of satisfaction with respect to Quality of Service (QoS) pre requisites fulfillment. Given the created coalitions among the M2M devices, a distributed power control framework is proposed towards determining each M2M device{\textquoteright}s optimal transmission power in order to fulfill its QoS prerequisites. The performance of the proposed approach is evaluated via modeling and simulation and its superiority compared to other state of the art approaches is illustrated.},
	address = {Baltimore, MD},
	booktitle = {The 51st Conference on Information Sciences and Systems (CISS 2017)},
	pages = {pp. 1-6},
	organization = {Johns Hopkins University}
}
@conference {
	title = {On the Mitigation of Interference Imposed by Intruders in Passive RFID Networks},
	author = {Tsiropoulou, Eirini Eleni., Baras, John S., Papavassiliou, Symeon., Qu, G.},
	year = {2016},
	month = {11/2016},
	abstract = {RFID networks are becoming an integral part of the emerging Internet of Things (IoT) era. Within this paradigm passive RFID networks have emerged as low cost energy-efficient alternatives that find applicability in a wide range of applications. However, such RFID networks and devices, due to their limited capabilities, can easily become vulnerable to several intrusive actions. In this paper, the problem of proactively protecting a passive RFID network from security threats imposed by intruders that introduce high interference to the system resulting in the possible disruption of the network{\textquoteright}s proper operation is investigated. Passive RFID tags are associated with a well-designed utility function reflecting on one hand their goal to have their signal properly demodulated by the reader, and on the other hand their risk level of participating in the network, stemming from their hardware characteristics among others, thus characterizing them as normal or intruder tags. An interference mitigation risk aware (IMRA) problem is introduced aiming at maximizing each tag{\textquoteright}s utility function, thus implicitly enforcing tags to conform to a more social behavior. Due to its nature, the proposed problem is formulated as a non-cooperative game among all the tags (normal and intruders) and its Nash equilibrium point is determined via adopting the theory of supermodular games. Convergence of the game to its Nash equilibrium is also shown. A distributed iterative and low-complexity algorithm is proposed in order to obtain the Nash equilibrium point and the operational effectiveness of the proposed approach is evaluated through modeling and simulation.},
	address = {New York, NY},
	booktitle = {Conference on Decision and Game Theory for Security (GameSec 2016)}
}
@conference {
	title = {On the Mitigation of Interference Imposed by Intruders in Passive RFID Networks},
	author = {Tsiropoulou, Eirini Eleni., Baras, John S., Papavassiliou, Symeon., Qu, G.},
	year = {2016},
	month = {09/2016},
	address = {Garching, Munich},
	booktitle = {International Symposium on Networked Cyber-Physical Systems (NetCPS)}
}
@article {
	title = {RFID-based Smart Parking Management System},
	author = {Tsiropoulou, Eirini Eleni., Baras, John S., Papavassiliou, Symeon., Sinha, Surbhit. },
	year = {2017},
	month = {08/2017},
	abstract = {In this paper, the adoption of passive Radio Frequency Identification (RFID) tag-to-tag communication paradigm within the context of a smart parking system is evangelised, in terms of achieving improved energy-efficiency and operational effectiveness. To demonstrate that the joint routing and RFID readers{\textquoteright} transmission power minimisation problem is studied, considering tag-to-tag communication. The superiority of the proposed framework against conventional direct RFID reader-tag communication is demonstrated in terms of: (i) reduction of RFID readers{\textquoteright} transmission power to the minimum required to guarantee connectivity, and (ii) expansion of RFID reader{\textquoteright}s coverage area towards communicating with more distant tags, otherwise unreachable through direct communication.},
	pages = {pp. 1-4, 22-41},
	volume = {Vol. 3},
	journal = {Cyber-Physical Systems}
}
