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Popova, Iskra
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Publications (10 of 34) Show all publications
Popov, O., Popova, I. & Van, N. H. (2007). Extending the Combined Model for Congestion Control (CM4CC) to Heterogeneous Networks. In: Proceedings of the International Conference on Information Technology Interfaces, ITI: . Paper presented at 29th International Conference on Information Technology Interfaces; Dubrovnik; Croatia; 25 June 2007 through 28 June 2007 (pp. 723-727). IEEE conference proceedings
Open this publication in new window or tab >>Extending the Combined Model for Congestion Control (CM4CC) to Heterogeneous Networks
2007 (English)In: Proceedings of the International Conference on Information Technology Interfaces, ITI, IEEE conference proceedings, 2007, p. 723-727Conference paper, Published paper (Refereed)
Abstract [en]

TCP and UDP are the dominant transport protocols on the Internet. The first one is used for reliable transport, while the second one for multimedia applications. Their behavior is quite different, which makes coexistence a challenge. Namely, TCP is responsive to potential network problems, such as congestion, while UDP completely ignores it. The need to come up with a protocol that somehow extracts the �good: attributes of both TCP and UDP, and leaves out the less favorable to the Internet, has proved to be a challenging research venue. Rather then going for an �entirely� new protocol, our objectives have been to keep TCP as is, while using the mobile agent paradigm for UDP control. The proposed solution termed as Combined Model for Congestion Control (CM4CC) has been limited to wired networks. Today, the Internet is an aggregation of both wired and wireless infrastructures; the article focuses on the CM4CC extension in heterogeneous networks.

Place, publisher, year, edition, pages
IEEE conference proceedings, 2007
Series
Proceedings of the International Conference on Information Technology Interfaces, ITI, ISSN 1330-1012
Keyword
TCP, UDP flows, responsive and unresponsive flows, heterogeneous networks, congestion control, and mobile agents.
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-5947 (URN)10.1109/ITI.2007.4283860 (DOI)2-s2.0-48349136590 (Scopus ID)5172 (Local ID)953-7138-10-0 (ISBN)5172 (Archive number)5172 (OAI)
Conference
29th International Conference on Information Technology Interfaces; Dubrovnik; Croatia; 25 June 2007 through 28 June 2007
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
Popov, O. & Popova, I. (2007). Network Reliability and Stability through Security. In: Next Generation Networks Security. IOS Press
Open this publication in new window or tab >>Network Reliability and Stability through Security
2007 (English)In: Next Generation Networks Security, IOS Press, 2007Chapter in book (Other academic)
Place, publisher, year, edition, pages
IOS Press, 2007
Series
NATO Science Series ; 10
Keyword
network stability, reliability, security, IDS, extensive QoS
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-5882 (URN)4831 (Local ID)4831 (Archive number)4831 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
Popova, I. (2007). Spam Management. In: Policies for Secure Research Networks. Amsterdam, Netherlands: IOS Press
Open this publication in new window or tab >>Spam Management
2007 (English)In: Policies for Secure Research Networks, Amsterdam, Netherlands: IOS Press, 2007Chapter in book (Other academic)
Place, publisher, year, edition, pages
Amsterdam, Netherlands: IOS Press, 2007
Series
NATO Science Series. Series F, Computer and system sciences., ISSN 1387-6694
Keyword
spam, network abuse, depliting network services, management
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-5926 (URN)4841 (Local ID)4841 (Archive number)4841 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
Popov, O., Popova, I. & Van, N. (2006). Combined Model for Congestion Control. In: Information Technology Interfaces - ITI 2004 (pp. 657-662). Zagreb, Croatia: IEEE
Open this publication in new window or tab >>Combined Model for Congestion Control
2006 (English)In: Information Technology Interfaces - ITI 2004, Zagreb, Croatia: IEEE , 2006, p. 657-662Conference paper, Published paper (Other scientific)
Abstract [en]

Unlike TCP, UDP is unresponsive to network congestion. This may cause, inter alia, bandwidth starvation of responsive flows, severe and prolonged congestions or in the worst-case scenario a congestion collapse. The paper addresses new ideas for taming down the unresponsive flows. By using some of the desirable properties of mobile agents, the system is able to control the influx of non-TCP or unresponsive flows into the network. Various functions performed by mobile agents monitor non-TCP flows, calculate sending rates and modify their intensity according to the needs of the network to attain as good performance as it is possible.

Place, publisher, year, edition, pages
Zagreb, Croatia: IEEE, 2006
Keyword
network congestion, responisve and un-responsive flows, TCP, UDP, fairness, mobile agents, co-existence
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-3831 (URN)4833 (Local ID)4833 (Archive number)4833 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
Van, N. H., Popov, O. & Popova, I. (2006). Combined Model for Congestion Control - CM4CC. C I T. Journal of Computing and Information Technology, 14(4), 337-342
Open this publication in new window or tab >>Combined Model for Congestion Control - CM4CC
2006 (English)In: C I T. Journal of Computing and Information Technology, ISSN 1330-1136, Vol. 14, no 4, p. 337-342Article in journal (Refereed) Published
Abstract [en]

The growth of multimedia applications on the Internet made at least one fifth of the total network traffic to run over UDP. Unlike TCP, UDP is unresponsive to network congestion. This may cause, inter alia, bandwidth starvation of responsive flows, severe and prolonged congestions or in the worst-case scenario a congestion collapse. Hence, the coexistence of both protocols on fair-share premises converges towards impossibility. The paper deals with a new approach to solving the problem of taming down the unresponsive flows. By using some of the desirable properties of mobile agents, the system is able to control the influx of non-TCP or unresponsive flows into the network. Various functions performed by mobile agents monitor non-TCP flows, calculate sending rates and modify their intensity according to the needs of the network to attain as good performance as it is possible.

Keyword
TCP flows, non-responsive flows, congestion control, mobile agents, and simulation.
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-3829 (URN)10.2498/cit.2006.04.10 (DOI)4828 (Local ID)4828 (Archive number)4828 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
Popova, I. & Popov, O. (2006). Modelling ICT Diffusion. In: Exploiting the Knowledge Economy: Issues, Applications and Case Studies (pp. 390-396). IOS Press
Open this publication in new window or tab >>Modelling ICT Diffusion
2006 (English)In: Exploiting the Knowledge Economy: Issues, Applications and Case Studies, IOS Press, 2006, p. 390-396Chapter in book (Other academic)
Abstract [en]

The paper presents a part of the research devoted to exploring the experience with ICT diffusion in Central and Eastern European countries. The interest was broaden by the ambition to identify some of the metrics for measuring ICT diffusion, possibly recognize the different patterns behind the dissemination of these new technologies, and sort out the factors for the adoption of services supported through the Internet. It was also important to scale down the role and the magnitude of each one of the factors. The paper is a summary of the research results and some pointers to future studies.

Place, publisher, year, edition, pages
IOS Press, 2006
Series
Information and communication technologies and the knowledge economy, ISSN 1574-1230
Keyword
Internet penetration, early adoption, modeling ICT diffusion
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-5924 (URN)4834 (Local ID)1-58603-682-3 (ISBN)4834 (Archive number)4834 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
Popova, I. (2005). ICT for Development and Progress. MANU Annual Lectures
Open this publication in new window or tab >>ICT for Development and Progress
2005 (English)In: MANU Annual LecturesArticle in journal (Refereed) Published
Place, publisher, year, edition, pages
Skopje, Macedonia: Macedonian Academy of Sciences and Arts, 2005
Keyword
ICT, development, Internet, access, availabillity
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-3660 (URN)3742 (Local ID)3742 (Archive number)3742 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
Popova, I. & Popov, O. (2005). ICT Knowledge 4 ICT Diffusion. In: Innovation and the Knowledge Economy: Issues, Applications, Case Studies. Vol. 2 Information and Communication Technologies and the Knowledge Economy (pp. 792-799). Amsterdam: IOS Press
Open this publication in new window or tab >>ICT Knowledge 4 ICT Diffusion
2005 (English)In: Innovation and the Knowledge Economy: Issues, Applications, Case Studies. Vol. 2 Information and Communication Technologies and the Knowledge Economy, Amsterdam: IOS Press , 2005, p. 792-799Conference paper, Published paper (Refereed)
Abstract [en]

The paper presents the work performed under ICT4ICT project with a main concern upon ICT diffusion in the CEE countries. A simple model for identifying the crucial factors for penetration of the new technologies is developed. It is used for selecting countries that have achieved high level of connectivity and ICT use, yet with limited resources and depending heavily upon the knowledge of its people. Estonia�s experience is presented as an example. The lessons learned are implemented in three pilot projects in the CEE countries that have been less successful in spreading ICT. Dissemination of knowledge was the essence of these endeavours. Finally, the results and plans for future work are portrayed.

Place, publisher, year, edition, pages
Amsterdam: IOS Press, 2005
Keyword
ICT Diffusion, CEE countries
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-3651 (URN)3710 (Local ID)978-1-58603-563-0 (ISBN)3710 (Archive number)3710 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
Popova, I., Popov, O. & Dalin, R. (2005). ICT4ICT ICT - Knowledge for ICT Diffusion. Sundsvall: Department of Information Technology and Media,
Open this publication in new window or tab >>ICT4ICT ICT - Knowledge for ICT Diffusion
2005 (English)Book (Other scientific)
Abstract [en]

Much of the work that explores and studies the indicators for ICT readiness focuses on the economical factors joint by a sufficient level of education, as the driving force for the wide spread of these technologies. It has been argued that the diffusion rate is in most cases proportional to the growth of the income. Despite of the relatively high level of the human development index in most of the Central and Eastern European countries including the former Soviet republics, the degree of connectivity and Internet use demonstrates large discrepancies. Ten of them with the highest GDP have joined the EU and have much higher ICT diffusion compared to the others. Interestingly enough some have achieved the same rate of ICT diffusion despite significantly lower level of wealth. Sharing their positive experience with the CEE countries that are lagging behind with respect to ICT diffusion could possibly reduce and finally diminish the digital divide. The experience with ICT diffusion in the CEE countries is explored and a model for identifying the predominant factors was developed in order to identify those that have achieved high level of connectivity and ICT use, yet with limited resources and depending heavily upon the knowledge of its people. Estonia has expressed very high inclination and enthusiasm towards experimenting with and adopting the contemporary technologies. One of the decisive factors for establishment and development of the information society have been the IT-program for developing e-services, accompanied with creating access for all the citizens. The lessons learned from Estonia�s experience served as guidance in developing the three pilot projects implemented in Armenia and Macedonia. The primary goal was to provide means of how to possibly overcome the debilitating ignorance that spans from an ordinary citizen to a high level decision maker, in understanding the width, the depth, the profoundness, and the power of the ICT.

Place, publisher, year, edition, pages
Sundsvall: Department of Information Technology and Media,, 2005. p. 74
Keyword
ICT Diffusion, CEE countries
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-3653 (URN)3712 (Local ID)3712 (Archive number)3712 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
Rahmani, R., Popov, O. & Popova, I. (2004). An active queue management algorithm for congestion detection and control in dynamic network topologies. In: Callaos, N; Chang, RS; Lo, YK; ElBadawy, ESA (Ed.), 8TH WORLD MULTI-CONFERENCE ON SYSTEMICS, CYBERNETICS AND INFORMATICS, VOL XI, PROCEEDINGS - CONTROL, COMMUNICATION AND NETWORK SYSTEMS, TECHNOLOGIES AND APPLICATIONS: Vol. 1. Paper presented at 8th World Multi-Conference on Systemics, Cybernetics and Informatics, Jul 18-21, 2004, Orlando, FL (pp. 263-267). Zagreb: SRCE University Computing Centre
Open this publication in new window or tab >>An active queue management algorithm for congestion detection and control in dynamic network topologies
2004 (English)In: 8TH WORLD MULTI-CONFERENCE ON SYSTEMICS, CYBERNETICS AND INFORMATICS, VOL XI, PROCEEDINGS - CONTROL, COMMUNICATION AND NETWORK SYSTEMS, TECHNOLOGIES AND APPLICATIONS: Vol. 1 / [ed] Callaos, N; Chang, RS; Lo, YK; ElBadawy, ESA, Zagreb: SRCE University Computing Centre , 2004, p. 263-267Conference paper, Published paper (Refereed)
Abstract [en]

One of the main objectives of Active Queue Management (AQM) mechanisms is to provide low delay and low packet loss in best-effort service networks. Nevertheless, AQM algorithms exhibit some weaknesses in the process of congestion detection and congestion whenever we have a dynamic network topology. The paper proposes a new AQM algorithm termed as Adaptive AQM (AAQM) to attain both fairness and congestion control in heterogeneous networks. The performance of AAQM is compared to Blue, Drop-tail, RED and REM using both Reno and Vegas version of TCP. The results based on a large series of simulations with ns (network simulator) indicate that AAQM using Reno is more robust, which means that it is highly responsive to the time-varying state of the network.

Place, publisher, year, edition, pages
Zagreb: SRCE University Computing Centre, 2004
Keyword
Dynamic network technologies, AQM, congestion, lossy links, control
National Category
Computer Sciences
Identifiers
urn:nbn:se:miun:diva-3347 (URN)10.1109/ITI.2004.242577 (DOI)000227689600051 ()3730 (Local ID)953-96769-9-1 (ISBN)980-6560-13-2 (ISBN)3730 (Archive number)3730 (OAI)
Conference
8th World Multi-Conference on Systemics, Cybernetics and Informatics, Jul 18-21, 2004, Orlando, FL
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-01-12Bibliographically approved
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