Past Projects

Projects 2011

  • 3η εβδομάδα: Ανακοίνωση – Ανάθεση Θεμάτων
  • 5η εβδομάδα: Παρουσίαση στόχων – σχέδιο εργασίας 5%
  • 8η εβδομάδα: Παρουσίαση έκθεσης προόδου 35%
  • 13η εβδομάδα: Τελική Παρουσίαση μεγάλης εργασίας 60%
    • Σκοπός – Επιτεύγματα - Αποτελέσματα
  • 13η εβδομάδα: Τελική παράδοση μεγάλης εργασίας σε hardcopy
  • Κινητά δίκτυα τρίτης γενεάς (3G UMTS)
    • MBMS (Multimedia Broadcast Multicast Service) content provision using HSDPA (High Speed Downlink Packet Access)

Summary of project:
High Speed Downlink Packet Access (HSDPA) and Multimedia Broadcast multicast service (MBMS) systems are two of the most important steps of the UMTS Network evolution. HSDPA by providing UMTS Network with a more flexible and efficient method for utilizing radio resources manage to achieve significant improvements on the downlink system capacity, reduced network latency and achieved higher data rates for packet data services. On the other hand, MBMS by providing UMTS Network with a powerful tool to offer broadcast and multicast services efficiently, achieved significant Core- and Radio- resource savings. However, the existing MBMS solution utilizes UMTS Release 99 channels (DCH and FACH) for the MBMS content provision that is not very flexible neither efficient in terms of radio resource usage (codes and capacity allocation). In order to introduce more flexibility on the way radio resources are allocated, a good solution for the efficient MBMS service provision in UTRAN, that is also under discussion by 3GPP, is the utilization of HSDPA.

Work Required:

        • Study of HSDPA
        • Study of MBMS
        • Survey on the State of the art (on MBMS Service Provision using HSDPA)
        • Propose a solution for providing MBMS content using only HSDPA for Point-to-Multipoint and Point-to-Point Transmission modes.
          • P-t-P transmission mode (Dedicated resources are allocated for each MBMS user)
          • P-t-M transmission mode (the same resources are commonly shared by all, or a group of MBMS users within the cell)
  Christophoros Christophorou  
  • Programming Wireless
      Rovio Robot
Theodoros Yiannos Mylonas  
    • Mitigating the effect of congestions: end-to-end and in networks approaches
  Marios Lestas  
    • WLAN: IEEE802.11e (service prioritization, investigate video streaming and compare with IEEE 802.11a/b/g/n). Security issues in WLANs
Georgia Christodoulidou    
    • Wireless Broadband Network: survey of state of the art and deployment of a typical educational wireless broadband network (WIMAX, WIMESH)
Savvas Zanetos    
    • VoIP System evaluation in mobile networks. Evaluation of signalling protocols for session establishment. Influence of transport protocols (TCP, UDP, SCTP) on their performance
    • Routing Protocols for Vehicular Ad-hoc Networks
        • Literature Review
        • Implementation of a power adaptive routing algorithm in OPNET simulator.
Marios Mittilos Yiannos Mylonas  
  • Nature Inspired techniques in control or performance in WSNs
Ioanna Giannikou Pavlos Antoniou  
  • Implementation of Overload Control Techniques in sensor network test-bed
  • Implementing dissemination srategies for VANETs using VISSIM & OPNET simulators

Andreas Xeros
Yiannos Mylonas

  • Literrature review for Video surveillance using UAVs
  Marios Lestas/ Yiannos Mylonas  
  Evaluation of Video surveillance UAVs under OPNET    
  • Intrusion Detection System on WSN: Evaluating benign and malicious activity on WSN (1 person)
    The aim of the project is to monitor activity on WSN from both benign and viral applications in various network topology architectures
Xanthi Markou Crhistiana Ioannou  
  • GINSENG Topology Control implementation (more practical)
    The student will need to implement an existing algorithm designed for the purpose of GISNENG project in a contiki. The algorithm involves mechanisms building the network, allowing new nodes to enter, dealing with dead nodes and reconfiguring the network for optimizing performance.

Using mobility to mitigate congestion in Wireless Sensor Networks (more practical)
By adding some nodes starting near the area of congestion towards the sink, alternated disjoint paths can be created to enable alterative paths for data sampled to reach the sink. If some mobile nodes move to form these newly created paths then congestion can be mitigated. An algorithm has already been designed for this purpose. The student in this project will need to implement an already defined algorithm in NS2, obtain simulation results and explain them.



Using mobility to maximize communication coverage or sensing coverage in Wireless Sensor Networks (theoretical/can be practical if decided to continue as thesis)
Some areas in a WSN may not be covered. This may be caused by some obstacles not allowing nodes to communicate (or sense), or because nodes are far away from each other or even due to interference (for communication coverage only). These reasons may results in some coverage gaps. Some mobile nodes may move to the “best” locations and fill the gaps in order to maximize the coverage. The student will need to examine the existing algorithms which use mobile nodes to maximize the coverage of the network and come up with some ideas for improvements to them or even new approaches to solve these problems (e.g. an advantage of some algorithm, or a mechanism that one algorithm uses can be implemented to another to enhance it,). In addition to this the student may examine if any of the existing communication coverage and sensing coverage algorithms can be used from the one area to the other and vice versa.

Nicos Tsouris


Using mobility to eliminate the energy hole problem in Wireless Sensor Networks(theoretical/can be practical if decided to continue as thesis)
Some nodes consume more energy than others in WSNs and this results in the fact that the average energy of nodes in some areas is different to the one in other areas of the network. This project will involve investigating this scenario and existing algorithms which aim to overcome this energy hole problem. The student will need to come up with some ideas for improvements for these algorithms or even with new approaches to solving this problem.

Μαρία Ευθυμίου Marios Koutrolos  


    • Κινητά δίκτυα τέταρτης γενεάς (4G Heterogeneous Networks) Network Access and Content Coding Selection for mobile users in Heterogeneous Networks:
    In 4th Generation Networks (heterogeneous networks), a plethora of different Radio Access Technologies (RATs – i.e. WiMAX, WiFi, UMTS) will co-exist, overlap and be inter-connected in an all-IP framework and many internet appliances such as handheld computers, personal digital assistants (PDAs) and smart phones will emerge as pervasive computing devices. This convergence of different RATs into a mixed architecture, created an environment where the Network Operators need to manage the resources of different RATs simultaneously and provide to the end users independence and flexibility with the possibility to connect to the “best” point of attachment anytime, anywhere and anyhow.  Moreover, most multimedia web content currently used contains rich media data such as images, audio, and video, which are sometimes not suitable for those pervasive devices with limited display capability, process power and network bandwidth. As a result, Internet access is still constrained on these devices, and users frequently experience frustration when their devices are unable to handle certain media types or the data takes a long time to download in small-bandwidth networks such as GPRS. Therefore, in order to provide service to users with pervasive devices moving within a heterogeneous network environment, during the mobility of the users the quality of the media presentation (i.e. the content coding) and the radio access technology (i.e. WiMAX, WiFi, UMTS, etc.) used to provide this content often needs to be adjusted according to the current network conditions (i.e. available network bandwidth, etc.) and the capabilities of those devices.

    Work Required:

          • Study of Radio Resource Management for Heterogeneous Networks
          • Study of IEEE 802.21 Media Independent Handover framework
          • State of the art and related work on handover in heterogeneous networks
          • Propose an algorithm that by considering the instantaneous network’s and user’s context will achieve efficient radio access technology and content coding selection for users moving within a heterogeneous networks environment.
                  • Define also the context parameters that should be considered during this decision.
  Christoforos Christofourou  
  • Wireless Sensor Networks,Mobility for Data Collection and Algorithms
Ζήνωνας Αντωνίου Josephine Antoniou  
    • Implementing speed versus density in Broadcasting algoirthms
21 "Protocols and Applications for Ad Hoc Networks"
Froso Selari Yiannos Mylonas