Thesis Topics                        Current Thesis Students                 Graduated Thesis Students

Satellite Networks

Today's multimedia satellite networks may not provide high fidelity for quality-of-service mechanisms due to many challenges such as packet dropping due to the congestion, packet lost due to bad channel conditions, intentional jamming, etc. Some research topics are

Design and development of integrated satellite architectures

Quality of Service for satellite IP Internet

Ĝ  New QoS architectures for satellite IP based on DiffServ and MPLS traffic engineering over satellite for non-real-time and multimedia applications over satellite configuration

Study the impact of QoS parameters at different layer to meet the end-to-end user level performance requirements

Bandwidth allocation for return channel

Ĝ  New bandwidth allocation algorithms based on differentiated services for various high bandwidth applications

Ĝ  Interaction of Bandwidth on Demand (BoD) with transport layer protocols

Ĝ  Interaction of BoD with network congestion

Ĝ  Bandwidth allocation and fading

Ĝ  CDMA based return channel access protocol for mobile IP over satellite applications

Transport protocols for satellite IP networks

Ĝ  End-to-end IP security issue

Ĝ  TCP enhancements for real-time applications

Ĝ  Possibility of an efficient new transport protocol

Secure IP Multicast over GEO satellites:

Routing strategies for next generation satellite architectures

TCP Congestion Control for use in Satellite Networks: TCP offers its own congestion control algorithms, mostly designed by heuristics. The aim of this study is to come up with a congestion control algorithm to be used in TCP communication. Investigation of a new algorithm for TCP congestion control is a promising research area.

 

Watermarking and digital ownership

Watermark is a digital code embedded in the multimedia data, which may typically indicate the copyright owner, any type of hidden data, etc.

Ĝ  Watermarking based error concealment for images

Ĝ  Watermarking based error concealment for video

Ĝ  Watermarking based error concealment for voice

Ĝ  Watermarking for digital ownership for multimedia communication

 

Special Thesis Topic:  A New Earthquake Warning System using Satellites (*)

The impact of natural disasters such as flooding, forest fires, storms and earthquakes can be lessened through effective hazard management and mitigation. It is necessary to develop and enhance prediction models, monitor facilities and draft regulations and contingency plans applying to natural or manmade disasters. A reliable earthquake warning system may save thousands of lives. This topic is selected due to its importance for Turkey. This thesis should present a good literature survey related to existing warning systems including satellite based ones.  Propose a new 

(1)   design and development of  an Early Warning System for real time seismic source collection and analysis,

(2)   implementation tradeoffs for the system,

(3)   design of intelligent dynamic database system for storing imagery,

(4)   list the needs for deployment of broadband seismographs and GPS receivers in Turkey, 

Assets:  knowledge in image processing, remote sensing, excellent knowledge in stochastic processes .

*In collaboration with Kandilli Observatory and Earthquake Research Institute and Kandilli Research Center.

 

Other problems in

Image Processing, UWB, multiuser detection, OFDM.

 

THESIS WORKS in PROGRESS

PhD  İlker Bekmezci      TDMA based MAC Layer for Sensor Networks, Oct. 2004

PhD  Ömer Korçak        Routing Strategies for Integrated Satellite Networks, Oct. 2004

PhD Gürkan Gür            Multimedia Communications in Layered Satellite Networks, Oct. 2005  

MSc Onur Türkyılmaz     Algorithm for GSM Location Estimate, Oct. 2006  

MSc Fatih Er                  Error concealment for voice communications, Oct. 2006  

MSc Selda Demirağ      Security  Mechanisms in GEO Satellites, Oct. 2006

BSc Mustafa Yelmer       Location based services using GPS built-in GSM, Feb.2006

BSc Ozan Özen              Mobilangel, Feb.2006

BSc Doğa E. Akyol         Video over IP, Feb2006

Bsc Aykud Gonen           Video over IP, Feb 2006

 

COMPLETED THESIS

MSc Gürkan Gür            Error Concealment Methods for Images Using Watermarking, Oct. 2005  

MSc Suzan Bayhan       Performance of VoIP over Satellite Networks, June 2006 

MSc Ayşegül Tüysüz     Handover Strategies in Beyond 3G Networks, June 2006

MSc Meltem Yildirim      Handover in LEO Satellite Constellation, June 2005

MSc Attila Yavuz            Syncryption and Elliptic Curves in Satellite Networks, June 2006

BSc Fuad Malikov         Milchat Simulator  Part-1 , Feb. 2005

BSc Ayse Samasti        Milchat Simulator  Part-2, Feb. 2005

BSc Aziz Maz                A Policy Based User Managed Media Framework, Feb. 2005

BSc Selcuk Durna         Performance of Integrated Satellite Networks with OPNET Simulator, June 2006

BSc M.Serhat Arslan     An error concealment tool for voice, June 2006

 

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