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University: Jozef Stefan Institute
Name of sponsoring Professor: Prof. Dr. Gorazd Kandus
Department: Communication Systems

We are using OPNET for:

Research:

Mobile and satellite communications:
  • Performance evaluation of network coding techniques.
  • Performance evaluation of handover techniques in future converged networks.
  • Performance analysis of satellite and terrestrial networks
  • Performance evaluation of routing procedures in ISL (Inter-Satellite Link) networks.
  • Performance evaluation of mobility procedures
  • Performance evaluation of NGN.
  • Construction of flexible bandwidth on demand based Medium Access Control (MAC) protocol.
  • Scheduling of uplink resources (time slots).
  • Integration of the MAC protocol with Automatic Repeat Request (ARQ) error correction protocol.
Reference papers:
  • M. Junuzovic, K. Alic, A. Svigelj, Network-coding-based retransmission scheme for real time streaming applications in wireless broadcast networks. In procc. 6th Jožef Stefan International Postgraduate School Students Conference, May 20 - 22, 2014, Ljubljana, Slovenija.
     
  • A. Svigelj, M. Mohorcic, L. Franck, G. Kandus, Signalling analysis for traffic class dependent routing in packet switched ISL networks. Space communications, vol. 22, no. 2/4, pp. 191-203, 2013.
     
  • E. Pertovt, K. Alic, A. Svigelj, M. Mohorcic, Network coding aware routing for performance boost in wireless-mesh-network. In procc. 5th Jožef Stefan International Postgraduate School Students Conference, , 23rd of May 2013, Ljubljana, Slovenija.
     
  • E. Pertovt, K. Alic, A. Svigelj, M. Mohorcic, Performance evaluation of VoIP codecs over network coding in wireless mesh networks. In procc. of the International Conference on Electronics and Communication Systems, Recent advances in electronics and communication systems (ECS 2013) , July 16-19, 2013, Rhodes Island, Greece.
     
  • E. Pertovt, K. Alic, A. Svigelj, M. Mohorcic, Network coding aware routing for performance boost in wireless-mesh-network. In procc. of the 2nd Electrotechnical and Computer Science Conference ERK 2013, September 16-18, 2013, Portoroz, Slovenia.
     
  • K. Alic, E. Pertovt, A. Svigelj, Network topologies and traffic distribution evaluation for network coding. In procc. of Netware 2012 conference , August 19-24, 2012, Rome, Italy.
     
  • K. Alic, E. Pertovt, A. Svigelj, Routing-independent practical network coding algorithm. In procc. of the 21st Electrotechnical and Computer Science Conference ERK 2012, September 17-19, 2012, Portoroz, Slovenia.
     
  • E. Pertovt, K. Alic, A. Svigelj, M. Mohorcic, Simulation model for ant-based control algorithm in wireless mesh networks. In procc. of the 21st Electrotechnical and Computer Science Conference ERK 2012, September 17-19, 2012, Portoroz, Slovenia.
     
  • E. Pertovt, K. Alic, A. Svigelj, M. Mohorcic, Improving performance of wireless mesh networks with network coding. In procc. 4th Jožef Stefan International Postgraduate School Students Conference, , 25. May 2012, Ljubljana, Slovenija.
     
  • K. Alic, E. Pertovt, A. Svigelj, Simulation environment for network coding. In: MAHASNEH, Jaser (Ed.). Proceedings of Mosharaka International Conference on Communications, Networking and Information Technology, (MIC-CNIT2011) 16-18 December 2011, Dubai, UAE. [S. l.: s. n.], 2011,
     
  • E. Pertovt, K. Alic, M. Mohorcic, A. Svigelj, ETX-based metrics and adapted routing algorithms for network coding. In procc. of the Twentieth International Electrotechnical and Computer Science Conference ERK 2011, September 19-21, 2011,Portoroz, Slovenia.
     
  • K. Alic,E. Pertovt, A. Svigelj, COPE simulation model. In procc. of the Twentieth International Electrotechnical and Computer Science Conference ERK 2011, September 19-21, 2011,Portoroz, Slovenia.
     
  • K. Alic, A. Svigelj, T. Javornik, System performance evaluation of the IEEE 802.16e pico-base station in multihop-relay and mesh networks. WSEAS trans. commun., vol. 9, no. 10, pp. 615-625, 2010
     
  • M. Pesko, A. Svigelj, M. Mohorcic, M. Stular, Izbira primernega orodja za simulacijo VSN senzorskih omrezij, In procc. of the Nineteenth International Electrotechnical and Computer Science Conference ERK 2010, September 20-22, 2010,Portoroz, Slovenia.
     
  • K. Alic, A. Svigelj, T. Javornik, 802.16e pico base station for multihop relaying, In procc. of the Nineteenth International Electrotechnical and Computer Science Conference ERK 2010, September 20-22, 2010,Portoroz, Slovenia.
     
  • K. Alic, A. Svigelj, T. Javornik, Simulation model for multihop relay network based on mobile WiMAX standard. In procc. of the The 14th WSEAS International Conference on COMMUNICATIONS (Part of the 14 WSEAS CSCC Multiconference), July 23-25, 2010, Corfu Island, Greece
     
  • T. Celcer, A. Svigelj, M. Mohorcic, Network architectures exploiting multiple HAP constellations for load balancing. WSEAS trans. commun. vol. 7, no. 3, pp. 160-168, 2008.
     
  • M. Mohorcic, A. Svigelj, Network architectures for load balancing in multi-HAP networks. In procc: of the 4th IASME/WSEAS International conference on Engineering education, (EE'07). July 24-26, 2007, Agios Nikolaos, Crete Island.
     
  • A. Svigelj, M. Mohorcic, G. Kandus, Oscillation Suppression for Traffic Class Dependent Routing in ISL Network. IEEE trans. aerosp. electron. syst. vol. 43, pp. 187-196, 2007.
     
  • A. Vilhar, R. Novak, G. Kandus, Multihoming Benefits for Network Mobility in HAP Networks. In Procc... of Advanced Satellite Mobile Systems (ASMS) Conference 2006, May 29-31, 2006, Herrsching, Germany.
     
  • A. Vilhar, R. Novak, Home agent placement optimization for HAP-based network mobility. "In Procc. International Workshop on Satellite and Space Communications 2005, IWSSC, as part of ISWCS'05, 2nd Internatinal Symposium on Wireless Communicatin Systems" September 8-9, 2005, Siena, Italy.
     
  • A. Svigelj, M. Mohorcic, G. Kandus, Traffic class dependent routing in ISL networks with adaptive forwarding based on local link load information. Space commun., 2004, vol. 19, pp. 158-170.
     
  • G. Kandus, A. Svigelj, M. Mohorcic, The impact of different scheduling policies on traffic class dependent routing in intersatellite link networks. Int. j. satell. commun., vol. 22, pp. 533-546, 2004.
     
  • M. Mohorcic, A. Svigelj, G. Kandus. Traffic class dependent routing in ISL networks. IEEE trans. aerosp. electron. syst., vol. 39, pp. 1160-1172, 2004.
     
  • A. Svigelj, M. Mohorcic,G. Kandus, A. Kos, M. Pustišek, J Bešter, Routing in ISL networks considering empirical IP traffic. IEEE Journal on selected areas in Communications, Vol. 22, pp. 261-272, 2004.
     
  • M. Mohorcic, A. Svigelj, G. Kandus, Routing in ISL network with adaptive forwarding based on local link information. WSEAS Transactions on Computers, Vol. 3, pp. 999-1004, 2004.
     
  • M. Mohorcic, A. Svigelj, G. Kandus, Y. F. Hu, R. E. Sheriff, Demographically weighted traffic flow models for adaptive routing in packet-switched non-geostationary satellite meshed networks , Computer Networks Vol. 43 pp 113-131, 2003.
     
  • G. Kandus, A. Svigelj, M. Mohorcic, The Impact of Different Scheduling Policies on Traffic Class Dependent Routing in Intersatellite link network Procc. of ASMS conference, Italy, 2003.
     
  • A. Svigelj, M. Mohorcic, G. Kandus, Traffic class dependent routing in ISL network with adaptive forwarding based on local link load information. Satellite communications-from fade mitigation to service provision : international workshop of COST actions 272 and 280, 26-28 May 2003, ESTEC, Noordwijk, The Netherlands, (Proceedings, WPP 209). Noordwijk: ESA, 2003, pp. 395-402.
     
  • P. M. L. Chan, R. A. Wyatt-Millington, A. Svigelj, R. E. Sheriff, Y. F. Hu, P Conforto, C. Toocci, Performance analysis of mobility procedures in a hybrid space terrestrial IP environment. Computer Networks. [Print ed.], 2002, vol. 39, pp. 21-41.
 
COST 272 Action "Packet-Oriented Service Delivery via Satellite"
The main task of our group is to investigate routing issues in ISL networks. Different routing algorithms will be studied and the performance will be evaluated using OPNET Modeler simulation tool.
 
Reference papers:
 
COST 279 Action "Analysis and Design of Advanced Multiservice Networks supporting Mobility, Multimedia, and Internetworking"
The main task of our group is to investigate the impact of diffrenet traffic generators on routing issues in ISL networks. Different generators will be studied and the performance will be evaluated using OPNET Modeler simulation tool.
 
Reference papers:
 
COST 297 Action "High Altitude Platforms for Communications and Other Services - HAPCOS"
The main task of our group is to investigate the mobility issues in HAP systems. Performance will be evaluated using OPNET Modeler simulation tool.
 
Reference papers:
  • M. Mohorcic, A. Svigelj, Architectures for load balancing in multi-HAP networks. COST 297 temporary document: COST297-0205-WG10-PRI-P00. 2007.
     
  • A. Vilhar, R. Novak, "Improving network mobility in HAP network" : 1st Workshop of COST297 "HAPCOS", 26-27 October, 2006, York, UK. 2006.
 
COST ICO906 Action "Wireless Networking for Moving Objects - WiNeMo"
The main objective of this Action is to advance the state-of-the-art concerning networking aspects of scenarios integrating moving objects of the most varied kinds, ranging from personal use devices to sensors, into the Internet of the Future.
 
Reference papers:
  • A. Svigelj, Using SIP as a candidate protocol for congestion aware handover in heterogeneous access networks for real-time applications. COST 297 temporary document: COST ICO906-TD(11)001. 2011.
     
 
COST IC1104 Action "Random Network Coding and Designs over GF(q) "
This COST Action focuses on a new striking approach to random network coding based on award-winning work by R. Koetter and F. Kschischang, in which the network is viewed as a mechanism of delivering not packets but rather the subspace that these packets span, thus leading to a new kind of coding theory employing subspace codes. Restriction to the so-called Grassmannian codes has proven to be advantageous and leads to the theory of designs over GF(q).
 
 
Papers published at OPNETWORK conferences:

Teaching:

Postgraduate level:
 
Course: Mobile Communications
 
Content: Overview of cellular, cordless, satellite and wireless 2G and 3G systems. Terminals, base stations, switching and control centres. Standards and protocols. Interfaces, application software and services. Radio channel modelling. Modulation and coding schemes. TDMA, FDMA and CDMA cellular architectures. Resource allocation and management. Coverage and frequency planning. Examples of modelling and simulations of mobile network elements using SPW and OPNET.
 
Course: Modelling and simulations in telecommunication's networks
 
Content: The aim of the course is to introduce students to the concepts, techniques and practical aspects of the development and analysis of simulation models and computer simulations of telecommunication models. In particular the course will be concerned in its practical aspects with discrete event simulation tool OPNET Modeler.
 
 
Ph. D. thesis: Performance evaluation of Network Coding techniques
Ph. D. thesis: Routing algorithms for Network Coding techniques
M. Sc. thesis: Network Coding techniques for video streaming

 
Last update: August 2014  
 

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