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Popescu, Adrian
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Publikationer (10 of 106) Visa alla publikationer
Popescu, A. & Westerhagen, A. (2022). Network Softwarization: Developments and Challenges. In: 14th International Conference on Communications, COMM 2022 - Proceedings: . Paper presented at 14th International Conference on Communications, COMM 2022, Bucharest, 16 June 2022 through 18 June 2022. Institute of Electrical and Electronics Engineers (IEEE)
Öppna denna publikation i ny flik eller fönster >>Network Softwarization: Developments and Challenges
2022 (Engelska)Ingår i: 14th International Conference on Communications, COMM 2022 - Proceedings, Institute of Electrical and Electronics Engineers (IEEE), 2022Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The paper provides an overview of network softwarization. This refers to network changes and adaptations regarding the convergence to Software Defined Networking and Network Function Virtualisation as well as moving the network control to Data Centers and Mobile Edge. For doing this, basic concepts and elements used in the performance provision in softwarized networking environments are used. Adequate performance frame-works can be defined, including relevant metrics and models, to be used in the development, deployment and operation of cloud and edge computing architectures as well as 5G network slicing. The paper provides an overview of network slicing, backbone of 5G technology, as well. © 2022 IEEE.

Ort, förlag, år, upplaga, sidor
Institute of Electrical and Electronics Engineers (IEEE), 2022
Serie
IEEE International Conference on Communications, ISSN 1550-3607, E-ISSN 1938-1883
Nyckelord
cloud computing, edge computing, network slicing, SDN/NFV networking, Computer architecture, Cloud-computing, Datacenter, Development and challenges, Network-control, Performance, Software-defined networkings, Software-defined networks, 5G mobile communication systems
Nationell ämneskategori
Kommunikationssystem
Identifikatorer
urn:nbn:se:bth-23538 (URN)10.1109/COMM54429.2022.9817293 (DOI)2-s2.0-85135166155 (Scopus ID)9781665494854 (ISBN)
Konferens
14th International Conference on Communications, COMM 2022, Bucharest, 16 June 2022 through 18 June 2022
Tillgänglig från: 2022-08-12 Skapad: 2022-08-12 Senast uppdaterad: 2023-09-21Bibliografiskt granskad
Popescu, A. (2020). On the Performance of Virtualised Communication Systems. In: 2020 13th International Conference on Communications, COMM 2020 - Proceedings: . Paper presented at 13th International Conference on Communications, COMM 2020, Bucharest, Romania, 18 June 2020 through 20 June 2020 (pp. 3-14). Institute of Electrical and Electronics Engineers Inc., Article ID 9141950.
Öppna denna publikation i ny flik eller fönster >>On the Performance of Virtualised Communication Systems
2020 (Engelska)Ingår i: 2020 13th International Conference on Communications, COMM 2020 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2020, s. 3-14, artikel-id 9141950Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The paper provides a framework for the definition and provision of performance in virtualised communication systems. For doing this, basic concepts and elements used in the performance provision in non-SDN/NFV networking environments are used. Based on that, adequate performance frameworks can be defined, including relevant metrics and models, to be used in the development, deployment and operation of future Software Defined Networking and Network Function Virtualisation (SDN/NFV) environments. © 2020 IEEE.

Ort, förlag, år, upplaga, sidor
Institute of Electrical and Electronics Engineers Inc., 2020
Nyckelord
architectural framework, Network Function Virtualisation, Software Defined Networking, standards, Virtualised communication systems, Basic concepts, Network functions, Networking environment, Performance frameworks, Virtualisation
Nationell ämneskategori
Kommunikationssystem Datavetenskap (datalogi)
Identifikatorer
urn:nbn:se:bth-20542 (URN)10.1109/COMM48946.2020.9141950 (DOI)000612723900001 ()2-s2.0-85091699303 (Scopus ID)9781728156118 (ISBN)
Konferens
13th International Conference on Communications, COMM 2020, Bucharest, Romania, 18 June 2020 through 20 June 2020
Tillgänglig från: 2020-10-12 Skapad: 2020-10-12 Senast uppdaterad: 2021-11-15Bibliografiskt granskad
Popescu, A. (Ed.). (2018). Greening Video Distribution: Networks Energy-Efficient Internet Video Delivery. Springer
Öppna denna publikation i ny flik eller fönster >>Greening Video Distribution: Networks Energy-Efficient Internet Video Delivery
2018 (Engelska)Samlingsverk (redaktörskap) (Refereegranskat)
Abstract [en]

This insightful text presents a guide to video distribution networks (VDNs), providing illuminating perspectives on reducing power consumption in IP-based video networks from an authoritative selection of experts in the field. A particular focus is provided on aspects of architectures, models, Internet protocol television (IPTV), over-the-top (OTT) video content, video on demand (VoD) encoding and decoding, mobile terminals, wireless multimedia sensor networks (WMSNs), software defined networking (SDN), and techno-economic issues.

Topics and features: reviews the fundamentals of video over IP distribution systems, and the trade-offs between network/service performance and energy efficiency in VDNs; describes the characterization of the main elements in a video distribution chain, and techniques to decrease energy consumption in software-based VoD encoding; introduces an approach to reduce power consumption in mobile terminals during video playback, and in data center networks using the SDN paradigm; discusses the strengths and limitations of different methods for measuring the energy consumption of mobile devices; proposes optimization methods to improve the energy efficiency of WMSNs, and a routing algorithm that reduces energy consumption while maintaining the bandwidth; presents an economic analysis of the savings yielded by approaches to minimize energy consumption of IPTV and OTT video content services.

The broad coverage and practical insights offered in this timely volume will be of great value to all researchers, practitioners and students involved with computer and telecommunication systems.​

Ort, förlag, år, upplaga, sidor
Springer, 2018. s. 27
Serie
Computer Communications and Networks, ISSN 1617-7975
Nationell ämneskategori
Telekommunikation
Identifikatorer
urn:nbn:se:bth-17222 (URN)10.1007/978-3-319-71718-0 (DOI)978-3-319-71718-0 (ISBN)978-3-319-71717-3 (ISBN)
Tillgänglig från: 2018-11-05 Skapad: 2018-11-05 Senast uppdaterad: 2018-11-05Bibliografiskt granskad
Popescu, A. & Chaudhry, M. A. (2018). Managing the OTT Traffic in NFV Environment. In: 2018 12th International Conference on Communications, COMM 2018 - Proceedings: . Paper presented at 12th International Conference on Communications, COMM, Bucharest (pp. 3-10). Institute of Electrical and Electronics Engineers Inc., Article ID 8430182.
Öppna denna publikation i ny flik eller fönster >>Managing the OTT Traffic in NFV Environment
2018 (Engelska)Ingår i: 2018 12th International Conference on Communications, COMM 2018 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2018, s. 3-10, artikel-id 8430182Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The emerging concepts Software Defined Networking (SDN) and Network Functions Virtualisation (NFV) lay the ground for system softwarization of future networks and services, under the umbrella of 5G. In this regard, a special focus is given to Video Distribution Networks (VDN), particularly in relation to existing difficulties in handling demands laid on the network as well as in relation to challenges in providing the expected Quality of Experience (QoE) and other performance demands like minimum energy consumption. The paper is focused on some of the most important elements associated with the virtualisation of Over-The-Top (OTT) video distribution networks and also advancing the system for managing the OTT traffic in Network Function Virtualisation (NFV) environment. The paper provides motivation, problem description, virtualisation target, standardisation efforts, NFV framework as well as short presentation of the main technical issues associated with managing the OTT traffic inNFV scenarios. © 2018 IEEE.

Ort, förlag, år, upplaga, sidor
Institute of Electrical and Electronics Engineers Inc., 2018
Serie
IEEE International Conference on Communications, ISSN 1550-3607
Nyckelord
architectural framework, Network Function Virtualisation, Over-The-Top, QoE-service, standards, Video Distribution Networks, Energy utilization, Quality of service, Transfer functions, Virtual reality, Architectural frameworks, Minimum energy consumption, Problem description, Quality of experience (QoE), Software defined networking (SDN), Virtualisation, Network function virtualization
Nationell ämneskategori
Telekommunikation
Identifikatorer
urn:nbn:se:bth-17003 (URN)10.1109/ICComm.2018.8430182 (DOI)000449526000001 ()2-s2.0-85052530969 (Scopus ID)9781538623503 (ISBN)
Konferens
12th International Conference on Communications, COMM, Bucharest
Tillgänglig från: 2018-09-13 Skapad: 2018-09-13 Senast uppdaterad: 2018-11-29Bibliografiskt granskad
Popescu, A., Yao, Y. & Ilie, D. (2018). Video Distribution Networks: Architectures and System Requirements. In: Adrian Popescu (Ed.), Greening Video Distribution Networks: Energy-Efficient Internet Video Delivery. Springer
Öppna denna publikation i ny flik eller fönster >>Video Distribution Networks: Architectures and System Requirements
2018 (Engelska)Ingår i: Greening Video Distribution Networks: Energy-Efficient Internet Video Delivery / [ed] Adrian Popescu, Springer, 2018Kapitel i bok, del av antologi (Refereegranskat)
Abstract [en]

The creation of video content and its distribution over the Internet Protocol (IP) are sophisticated processes that follow a chain model from the acquisition of the video source, production and packaging, transport, and finally distribution to viewers. Video distribution networks refer to several parts, namely content contribution, primary distribution, secondary distribution, and video consumers. The focus of the chapter is on the presentation of video distribution systems over IP, categories of architectural solutions as well as a short presentation of several important applications associated with video distribution networks.

Ort, förlag, år, upplaga, sidor
Springer, 2018
Serie
Computer Communications and Networks, ISSN 1617-7975
Nationell ämneskategori
Telekommunikation
Identifikatorer
urn:nbn:se:bth-17223 (URN)10.1007/978-3-319-71718-0_1 (DOI)9783319717180 (ISBN)9783319717173 (ISBN)
Tillgänglig från: 2018-11-05 Skapad: 2018-11-05 Senast uppdaterad: 2018-11-07Bibliografiskt granskad
Popescu, A., Yao, Y., Fiedler, M. & Ducloux, X. (2018). Video Distribution Networks: Models and Performance. In: Adrian Popescu (Ed.), Greening Video Distribution Networks: Energy-Efficient Internet Video Delivery (pp. 227). Springer
Öppna denna publikation i ny flik eller fönster >>Video Distribution Networks: Models and Performance
2018 (Engelska)Ingår i: Greening Video Distribution Networks: Energy-Efficient Internet Video Delivery / [ed] Adrian Popescu, Springer, 2018, s. 227-Kapitel i bok, del av antologi (Refereegranskat)
Abstract [en]

The creation, distribution and delivery of video content is a sophisticated process with elements like video acquisition, preprocessing and encoding, content production and packaging as well as distribution to customers. IP networks are usually used for the transfer of video signals. The treatment of video content is also very complex, and we have a multidimensional process with elements like content acquisition, content exchange and content distribution. The focus of the chapter is on the presentation of models that can be used to characterize the main elements in a video distribution chain. These models are about video coding and compression, video streaming, video traffic models, energy consumption models, system performance, concepts of performance optimization and QoE- and energy-optimal streaming.

Ort, förlag, år, upplaga, sidor
Springer, 2018
Serie
Computer Communications and Networks, ISSN 1617-7975
Nationell ämneskategori
Telekommunikation
Identifikatorer
urn:nbn:se:bth-17224 (URN)10.1007/978-3-319-71718-0_3 (DOI)978-3-319-71718-0 (ISBN)
Tillgänglig från: 2018-11-05 Skapad: 2018-11-05 Senast uppdaterad: 2021-05-04Bibliografiskt granskad
Yao, Y., Popescu, A., Fiedler, M. & Ljung, R. (2017). On the Performance of Video Streaming in Energy-Aware Wireless Mesh Networks. In: European Conference on Networks and Communications (EuCNC) 2017: . Paper presented at European Conference on Networks and Communications (EuCNC), Oulu, Finland. IEEE
Öppna denna publikation i ny flik eller fönster >>On the Performance of Video Streaming in Energy-Aware Wireless Mesh Networks
2017 (Engelska)Ingår i: European Conference on Networks and Communications (EuCNC) 2017, IEEE, 2017Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Mobile multimedia has today become a promising application for end users and service providers. With reference to the existing systems for mobile communications, this application further demands for solving several technical problems, especially regarding video streaming over wireless networks. An interesting approach is in form ofWireless Mesh Network (WMN) based networks, where the individual video flows operate in an end-to-end (e2e) manner along a particular networking scenario including several mesh routers. That means, a particular mesh router may be traversed by multiple video flows. This situation may become even more complicated in the case of a large amount of packet retransmissions, which may deteriorate the performance of video flows. To investigate this problem, a two-level Modulated Markov Poisson Process (MMPP) based queueing model is built up and the transport performance of e2e video streaming in WMN based mobile multimedia system is analysed. Four metrics are used to study the system performance, namely e2e throughput, e2e delay, e2e error-rate and traffic-related energy consumption. Numerical analysis and evaluation studies are done. Based on the reported results, two different solutions are suggested and discussed with regard to the trade-off among these metrics.

Ort, förlag, år, upplaga, sidor
IEEE, 2017
Serie
European Conference on Networks and Communications, ISSN 2475-6490, E-ISSN 2575-4912
Nyckelord
Streaming media, Energy consumption, Power demand, Routing, Mobile communication, Measurement, Mobile handsets
Nationell ämneskategori
Telekommunikation
Identifikatorer
urn:nbn:se:bth-15640 (URN)10.1109/EuCNC.2017.7980771 (DOI)000425922900130 ()978-1-5386-3873-6 (ISBN)
Konferens
European Conference on Networks and Communications (EuCNC), Oulu, Finland
Projekt
CONVINcE
Tillgänglig från: 2017-12-12 Skapad: 2017-12-12 Senast uppdaterad: 2021-05-04Bibliografiskt granskad
Monnier, R., Popescu, A. & Ljung, R. (2016). CONVINcE: Towards Power-Optimized Video Distribution Networks. In: : . Paper presented at Innovation in Clouds Internet and Networks (ICIN), 1st Workshop on Green Communications Systems, Paris.
Öppna denna publikation i ny flik eller fönster >>CONVINcE: Towards Power-Optimized Video Distribution Networks
2016 (Engelska)Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

CONVINcE is a CELTIC-PLUSproject dedicated to minimizing the power consumption in IP-based video distribution networks,from theheadend to the terminal. The entirevideo distribution chain is considered in the project, covering a wide range of entities involved in this process. Examples of theseentities are headend, edge cloud, Content Distribution Network (CDN), core backbone network, Radio Access Network (RAN) as well asfixedand mobile terminals. Related to this, one of the most difficult research questions is regarding the provision of minimum end-to-end power consumption for video streamscombined with the best possible Quality of Experience (QoE) obtained at the terminal. It requiressolving a number of sophisticated research questions, among them modellingand optimization problems.

Nyckelord
IP-based video distribution networks; energy saving; performance optimization
Nationell ämneskategori
Telekommunikation
Identifikatorer
urn:nbn:se:bth-15635 (URN)
Konferens
Innovation in Clouds Internet and Networks (ICIN), 1st Workshop on Green Communications Systems, Paris
Tillgänglig från: 2017-12-12 Skapad: 2017-12-12 Senast uppdaterad: 2018-05-23Bibliografiskt granskad
Popescu, A. (2016). Dealing with QoE and Power Consumption in Video Distribution Networks. In: 2016 INTERNATIONAL CONFERENCE ON COMMUNICATIONS (COMM 2016): . Paper presented at IEEE 11th International Conference on Communications (COMM), JUN 09-11, 2016, Bucharest, ROMANIA (pp. 3-8).
Öppna denna publikation i ny flik eller fönster >>Dealing with QoE and Power Consumption in Video Distribution Networks
2016 (Engelska)Ingår i: 2016 INTERNATIONAL CONFERENCE ON COMMUNICATIONS (COMM 2016), 2016, s. 3-8Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

The paper is about the problem of reducing the power consumption in Video Distribution Networks (VDNs) under the condition of best performance provision in terms of Quality of Experience (QuE) measured at the end user. Related to this, it has been observed that, given an end-to-end video distribution network, it is the last networking segment ending to terminal that has the dominant role in the provision of end-user performance. On the other hand, the rest of the video distribution chain can be optimized such to reduce the power consumption under the requirements of provision of specific Quality of Service (QoS) parameters. The paper first provides an overview of VDNs, which is followed by a short presentation of the CONVINcE project. The second part is focused on the problems of performance provision in VDN in terms of best possible Quality of Experience and minimum end-to-end power consumption.

Serie
International Conference on Communications (ICC)
Nyckelord
IP-based video distribution networks, energy saving
Nationell ämneskategori
Telekommunikation
Identifikatorer
urn:nbn:se:bth-13301 (URN)000383221900001 ()978-1-4673-8197-0 (ISBN)
Konferens
IEEE 11th International Conference on Communications (COMM), JUN 09-11, 2016, Bucharest, ROMANIA
Projekt
CONVINcE
Tillgänglig från: 2016-11-01 Skapad: 2016-11-01 Senast uppdaterad: 2017-12-13Bibliografiskt granskad
Yao, Y. & Popescu, A. (2016). On Energy Consumption in Mobile Multimedia Networks with OpenFlow Switch. In: 2016 INTERNATIONAL CONFERENCE ON COMMUNICATIONS (COMM 2016): . Paper presented at IEEE 11th International Conference on Communications (COMM), JUN 09-11, 2016, Bucharest, ROMANIA (pp. 309-312). IEEE
Öppna denna publikation i ny flik eller fönster >>On Energy Consumption in Mobile Multimedia Networks with OpenFlow Switch
2016 (Engelska)Ingår i: 2016 INTERNATIONAL CONFERENCE ON COMMUNICATIONS (COMM 2016), IEEE, 2016, s. 309-312Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

In mobile multimedia networks, the video flow usually operates in an end-to-end manner from Head-End to mobile terminals. However, measuring the energy consumption associated with a video flow is a sophisticated process due to the complexity related to this. In the paper, a theoretical measurement approach is suggested to estimate the energy consumption of a video flow through mobile multimedia networks enhanced with the support of OpenFlow switch. Two different power models are built up to compute the traffic related energy consumption at the network element side. The numerical derivation of these two theoretical models is presented.

Ort, förlag, år, upplaga, sidor
IEEE, 2016
Serie
International Conference on Communications (ICC)
Nyckelord
Mobile multimedia network, energy consumption, Software Defined Network, OpenFlow switch
Nationell ämneskategori
Medieteknik Telekommunikation
Identifikatorer
urn:nbn:se:bth-13304 (URN)000383221900064 ()978-1-4673-8197-0 (ISBN)
Konferens
IEEE 11th International Conference on Communications (COMM), JUN 09-11, 2016, Bucharest, ROMANIA
Tillgänglig från: 2016-11-01 Skapad: 2016-11-01 Senast uppdaterad: 2018-01-13Bibliografiskt granskad
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