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Popescu, Adrian
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Publications (10 of 104) Show all publications
Popescu, A. (Ed.). (2018). Greening Video Distribution: Networks Energy-Efficient Internet Video Delivery. Springer
Open this publication in new window or tab >>Greening Video Distribution: Networks Energy-Efficient Internet Video Delivery
2018 (English)Collection (editor) (Refereed)
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.​

Place, publisher, year, edition, pages
Springer, 2018. p. 27
Series
Computer Communications and Networks, ISSN 1617-7975
National Category
Telecommunications
Identifiers
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)
Available from: 2018-11-05 Created: 2018-11-05 Last updated: 2018-11-05Bibliographically approved
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.
Open this publication in new window or tab >>Managing the OTT Traffic in NFV Environment
2018 (English)In: 2018 12th International Conference on Communications, COMM 2018 - Proceedings, Institute of Electrical and Electronics Engineers Inc. , 2018, p. 3-10, article id 8430182Conference paper, Published paper (Refereed)
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.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers Inc., 2018
Series
IEEE International Conference on Communications, ISSN 1550-3607
Keywords
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
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-17003 (URN)10.1109/ICComm.2018.8430182 (DOI)000449526000001 ()2-s2.0-85052530969 (Scopus ID)9781538623503 (ISBN)
Conference
12th International Conference on Communications, COMM, Bucharest
Available from: 2018-09-13 Created: 2018-09-13 Last updated: 2018-11-29Bibliographically approved
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
Open this publication in new window or tab >>Video Distribution Networks: Architectures and System Requirements
2018 (English)In: Greening Video Distribution Networks: Energy-Efficient Internet Video Delivery / [ed] Adrian Popescu, Springer, 2018Chapter in book (Refereed)
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.

Place, publisher, year, edition, pages
Springer, 2018
Series
Computer Communications and Networks, ISSN 1617-7975
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-17223 (URN)10.1007/978-3-319-71718-0_1 (DOI)9783319717180 (ISBN)9783319717173 (ISBN)
Available from: 2018-11-05 Created: 2018-11-05 Last updated: 2018-11-07Bibliographically approved
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
Open this publication in new window or tab >>Video Distribution Networks: Models and Performance
2018 (English)In: Greening Video Distribution Networks: Energy-Efficient Internet Video Delivery / [ed] Adrian Popescu, Springer, 2018, p. 227-Chapter in book (Refereed)
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.

Place, publisher, year, edition, pages
Springer, 2018
Series
Computer Communications and Networks, ISSN 1617-7975
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-17224 (URN)10.1007/978-3-319-71718-0_3 (DOI)978-3-319-71718-0 (ISBN)
Available from: 2018-11-05 Created: 2018-11-05 Last updated: 2018-11-07Bibliographically approved
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
Open this publication in new window or tab >>On the Performance of Video Streaming in Energy-Aware Wireless Mesh Networks
2017 (English)In: European Conference on Networks and Communications (EuCNC) 2017, IEEE, 2017Conference paper, Published paper (Refereed)
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.

Place, publisher, year, edition, pages
IEEE, 2017
Series
European Conference on Networks and Communications, ISSN 2475-6490, E-ISSN 2575-4912
Keywords
Streaming media, Energy consumption, Power demand, Routing, Mobile communication, Measurement, Mobile handsets
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-15640 (URN)10.1109/EuCNC.2017.7980771 (DOI)000425922900130 ()978-1-5386-3873-6 (ISBN)
Conference
European Conference on Networks and Communications (EuCNC), Oulu, Finland
Projects
CONVINcE
Available from: 2017-12-12 Created: 2017-12-12 Last updated: 2018-05-23Bibliographically approved
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.
Open this publication in new window or tab >>CONVINcE: Towards Power-Optimized Video Distribution Networks
2016 (English)Conference paper, Published paper (Refereed)
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.

Keywords
IP-based video distribution networks; energy saving; performance optimization
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-15635 (URN)
Conference
Innovation in Clouds Internet and Networks (ICIN), 1st Workshop on Green Communications Systems, Paris
Available from: 2017-12-12 Created: 2017-12-12 Last updated: 2018-05-23Bibliographically approved
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).
Open this publication in new window or tab >>Dealing with QoE and Power Consumption in Video Distribution Networks
2016 (English)In: 2016 INTERNATIONAL CONFERENCE ON COMMUNICATIONS (COMM 2016), 2016, p. 3-8Conference paper, Published paper (Refereed)
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.

Series
International Conference on Communications (ICC)
Keywords
IP-based video distribution networks, energy saving
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-13301 (URN)000383221900001 ()978-1-4673-8197-0 (ISBN)
Conference
IEEE 11th International Conference on Communications (COMM), JUN 09-11, 2016, Bucharest, ROMANIA
Projects
CONVINcE
Available from: 2016-11-01 Created: 2016-11-01 Last updated: 2017-12-13Bibliographically approved
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
Open this publication in new window or tab >>On Energy Consumption in Mobile Multimedia Networks with OpenFlow Switch
2016 (English)In: 2016 INTERNATIONAL CONFERENCE ON COMMUNICATIONS (COMM 2016), IEEE, 2016, p. 309-312Conference paper, Published paper (Refereed)
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.

Place, publisher, year, edition, pages
IEEE, 2016
Series
International Conference on Communications (ICC)
Keywords
Mobile multimedia network, energy consumption, Software Defined Network, OpenFlow switch
National Category
Media and Communication Technology Telecommunications
Identifiers
urn:nbn:se:bth-13304 (URN)000383221900064 ()978-1-4673-8197-0 (ISBN)
Conference
IEEE 11th International Conference on Communications (COMM), JUN 09-11, 2016, Bucharest, ROMANIA
Available from: 2016-11-01 Created: 2016-11-01 Last updated: 2018-01-13Bibliographically approved
Yao, Y. & Popescu, A. (2016). On Energy Consumption in Mobile Multimedia Networks with OpwnFlow Switch. In: International Conference on Communications (COMM), 2016: . Paper presented at The 11th International Conference on Communications (COMM), Bucharest. IEEE
Open this publication in new window or tab >>On Energy Consumption in Mobile Multimedia Networks with OpwnFlow Switch
2016 (English)In: International Conference on Communications (COMM), 2016, IEEE, 2016Conference paper, Published paper (Refereed)
Abstract [en]

With the advance of new wireless technologies and ubiquitous radio access, mobile multimedia is becoming a very important application for both service providers and end users. This also leads to different business models such as mobile television, mobile conferencing, and remote gaming. A Mobile Multimedia Network (MMN) generally refers to several parts, which are known as the video contribution, the network distribution and the mobile terminals. The video contribution is connected to the functions of generating and processing the video content, which is eventually transferred onto the network for further distribution to mobile terminals.

Place, publisher, year, edition, pages
IEEE, 2016
Keywords
Streaming media, Energy consumption, Mobile communication, Switches, Mobile computing, Numerical models, Power demand
National Category
Telecommunications
Identifiers
urn:nbn:se:bth-15639 (URN)10.1109/ICComm.2016.7528299 (DOI)
Conference
The 11th International Conference on Communications (COMM), Bucharest
Projects
CONVINcE
Available from: 2017-12-12 Created: 2017-12-12 Last updated: 2018-05-23Bibliographically approved
Fiedler, M., Popescu, A. & Yao, Y. (2016). QoE-aware sustainable throughput for energy-efficient video streaming. In: Cai Z.,Luo G.,Cheng L.,Angryk R.,Li Y.,Bourgeois A.,Song W.,Cao X.,Krishnamachari B. (Ed.), Proceedings - 2016 IEEE International Conferences on Big Data and Cloud Computing, BDCloud 2016, Social Computing and Networking, SocialCom 2016 and Sustainable Computing and Communications, SustainCom 2016: . Paper presented at 6th IEEE International Conference on Big Data and Cloud Computing, BDCloud 2016, 9th IEEE International Conference on Social Computing and Networking, SocialCom 2016 and 2016 IEEE International Conference on Sustainable Computing and Communications, SustainCom, Atlanta, USA (pp. 493-500). IEEE
Open this publication in new window or tab >>QoE-aware sustainable throughput for energy-efficient video streaming
2016 (English)In: Proceedings - 2016 IEEE International Conferences on Big Data and Cloud Computing, BDCloud 2016, Social Computing and Networking, SocialCom 2016 and Sustainable Computing and Communications, SustainCom 2016 / [ed] Cai Z.,Luo G.,Cheng L.,Angryk R.,Li Y.,Bourgeois A.,Song W.,Cao X.,Krishnamachari B., IEEE, 2016, p. 493-500Conference paper, Published paper (Refereed)
Abstract [en]

This work motivates and details the concept of QoE-aware sustainable throughput in the area of video streaming. Sustainable throughput serves as a mean to compare video streaming solutions in terms of Quality of Experience (QoE) and energy efficiency (EE). It builds upon the QoE Provisioning-Delivery Hysteresis (PDH) and denotes the maximal throughput at which QoE deteriorations can be kept below a quantifiable level, which in turn allows to compare the EE of different video streaming solutions on QoE-fair grounds. In this work, we particularly focus on delivery problems stemming from outage-prone links, as they are typical for mobile systems. Well-adapted to the nature of the video-associated data streams and disturbances, a stochastic fluid flow model is used that allows for straightforward calculation of sustainable throughput values. We also discuss the application of the sustainable throughput for comparisons among different streaming solutions and their offered QoE and EE, respectively.

Place, publisher, year, edition, pages
IEEE, 2016
Keywords
Energy efficiency, Quality of experience, Quality of service, Stochastic fluid flow model, Big data, Cloud computing, Distributed computer systems, Flow of fluids, Stochastic models, Stochastic systems, Throughput, Video streaming, Data stream, Delivery problems, Energy efficient, Fluid flow modeling, Maximal throughput, Mobile systems, Quality of experience (QoE)
National Category
Media and Communication Technology
Identifiers
urn:nbn:se:bth-13649 (URN)10.1109/BDCloud-SocialCom-SustainCom.2016.78 (DOI)000392516300067 ()2-s2.0-85001022219 (Scopus ID)9781509039364 (ISBN)
Conference
6th IEEE International Conference on Big Data and Cloud Computing, BDCloud 2016, 9th IEEE International Conference on Social Computing and Networking, SocialCom 2016 and 2016 IEEE International Conference on Sustainable Computing and Communications, SustainCom, Atlanta, USA
Projects
CONVINcE
Available from: 2016-12-21 Created: 2016-12-21 Last updated: 2018-01-13Bibliographically approved
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