Test bench to test protocols and algorithms for multimedia delivery

Nowadays, the study of Quality of Service (QoS) in multimedia streaming is generally carried out by simulators. However, the results of these tests are not quite real. This forces researchers to work with approximations. In this paper, we implement a test bench to test the performance and assess the protocols and algorithms for multimedia delivery. This test bench let us evaluate the network parameters performance, by manipulating the devices under controlled conditions, and allow us to identify different application cases. We can confirm that the designed test bench gives us more real measures than a simulators, which allows us to do many types of tests with low cost.Jimenez, JM.; Lloret, J.; Díaz Santos, JR.; Lacuesta Gilaberte, R. (2017). Test bench to test protocols and algorithms for multimedia delivery. En Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering. Springer Verlag. 124-134. doi:10.1007/978-3-319-49580-4_12S124134Lloret, J., Garcia, M., Atenas, M., Canovas, A.: A QoE management system to improve the IPTV network. Int. J. Commun Syst 24(1), 118–138 (2011)Garcia, M., Canovas, A., Edo, M., Lloret, J.: A QoE management system for ubiquitous IPTV devices. In: The Third International Conference on Mobile Ubiquitous Computing, Systems, Services and Technologies, UBICOMM 2009, Sliema, Malta, 11–16 October 2009Álvarez, A., Pozueco, L., Cabrero, S., García Pañeda, X., García, R., Melendi, D., Díaz Orueta, G.: Adaptive streaming: a subjective catalog to assess the performance of objective QoE metrics. Netw. Protoc. Algorithms 6(2), 123–136 (2014)Jimenez, J.M., Romero, O., Rego, A., Dilendra, A., Lloret, J.: Study of multimedia delivery over software defined networks. Netw. Protoc. Algorithms 7(4), 37–62 (2015)Recomendation UIT/T G.1010: End-user multimedia QoS categories (2001). https://www.itu.int/rec/T-REC-G.1010-200111-I/enRecomendation UIT‑R M.1079-2: Performance and quality of service requirements for International Mobile Telecommunications-2000 (IMT-2000) access networks. https://www.itu.int/dms_pubrec/itu-r/rec/m/R-REC-M.1079-2-200306-I!!PDF-E.pdfGarcia, M., Lloret, J., Edo, M., Lacuesta, R.: IPTV distribution network access system using WiMAX and WLAN technologies. In: Proceedings of the 4th Edition of the UPGRADE-CN Workshop on Use of P2P GRID and Agents for the Development of Content Networks, Munich, Germany, 11–13 June 2009Atenas, M., Sendra, S., Garcia, M., Lloret, J.: IPTV performance in IEEE 802.11 n WLANs. In: IEEE GLOBECOM Workshops 2010, Miami, USA, pp. 929–933, December 2010Cisco Systems Inc. Cisco’s Visual Networking Index Forecast Projects Nearly Half the World’s Population Will Be Connected to the Internet by 2017. http://newsroom.cisco.com/press-release-content?articleId=1197391Lu, X., Tao, S., El Zarki, M., Guérin, R.: Quality based Adaptive Video Over the Internet. Department of ESE, University of Pennsylvania, Philadelphia, PA 19104 (2003)Lee, T.K., Chai, T.Y., Ngoh, L.H., Shao, X., Teo, J.C.M., Zhou, L.: An IMS-based testbed for real-time services integration and orchestration. In: IEEE Asia-Pacific Services Computing Conference (APSCC 2009), Singapore, 7–11 December 2009Mu, M., Mauthe, A., Casson, J., Tyson, G., Garcia, F.: LA1 TestBed: evaluation testbed to assess the impact of network impairments on video quality. In: 5th International Conference on Testbeds and Research Infrastructures for the Development of Networks & Communities and Workshops (TridentCom 2009), Washington, DC, 6–8 April 2009Kuwadekar, A., Al-Begain, K.: User centric quality of experience testing for video on demand over IMS. In: First International Conference on Computational Intelligence, Communication Systems and Networks (CICSYN 2009), Indore, India, 23–25 July 2009Downline Guide, Big Buck Bunny, Sunflower version. http://bbb3d.renderfarming.net/download.htmlFFmpeg. http://www.ffmpeg.org/about.htmlSullivan, G.J., Wiegand, T.: Video compression - from concepts to the H.264/AVC standard. Proc. IEEE 93(1), 18–31 (2005)Estepa, A.J., Estepa, R., Vozmediano, J., Carrillo, P.: Dynamic VoIP codec selection on smartphones. Netw. Protoc. Algorithms 6(2), 22–37 (2014

IPTV Service Framework Based on Secure Authentication and Lightweight Content Encryption for Screen-Migration in Cloud Computing

These days, the advancing of smart devices (e.g. smart phones, tablets, PC, etc.) capabilities and the increase of internet bandwidth enables IPTV service provider to extend their services to smart mobile devices. User can just receive their IPTV service using any smart devices by accessing the internet via wireless network from anywhere anytime in the world which is convenience for users. However, wireless network communication has well a known critical security threats and vulnerabilities to user smart devices and IPTV service such as user identity theft, reply attack, MIM attack, and so forth. A secure authentication for user devices and multimedia protection mechanism is necessary to protect both user devices and IPTV services. As result, we proposed framework of IPTV service based on secure authentication mechanism and lightweight content encryption method for screen-migration in Cloud computing. We used cryptographic nonce combined with user ID and password to authenticate user device in any mobile terminal they passes by. In addition we used Lightweight content encryption to protect and reduce the content decode overload at mobile terminals. Our proposed authentication mechanism reduces the computational processing by 30% comparing to other authentication mechanism and our lightweight content encryption reduces encryption delay to 0.259 second

CYCLOSTATIONARY FEATURES OF PAL TV AND WIRELESS MICROPHONE FOR COGNITIVE RADIO APPLICATIONS

Frequency spectrum being a scarce resource in communication system design, spectrum sharing seems to be the solution to an optimal utilization of frequency spectrum. The traditional fixed frequency allocation is not suitable for futuristic networks that demand more and more spectrum for new wireless services. Cognitive radio is a new emerging technology based on spectrum sharing concept. Spectrum sensing is a vital task in this emerging technology by which it is able to scan the frequency spectrum to identify the unused spectrum bands and utilize them. In this thesis, we discuss spectrum sensing in the context of IEEE 802.22 Wireless Regional Area Network (WRAN). In order to do so, we develop the co-existence scenario with three cases according to geographical positions of primary services and secondary service. In WRAN application, the SUs utilize the unused channel in TV spectrum, which means that the primary users are TV service and other FCC part 74 low power licensed devices. We focus on special case of Analog TV-PAL service and wireless microphone service as part 74 devices. Before discussing the spectrum sensing technique, we propose architecture for sensing receiver. The concept of noise uncertainty is also introduced in this context. The cyclostationarity theory is introduced and we explain the motivation behind using the theory for spectrum sensing and the reason that makes the cyclostationary features detector a powerful detection technique in cognitive radio. We obtain the cyclostationary features of these primary signals using spectral correlation function. Based on these features, we develop two algorithms for spectrum sensing and their performances are evaluated in comparison with energy detector which is considered as the standard simple detector. Given that the cyclostationary features are unique for a particular signal; these features can be used for signals classification. In our case, we use those features to decide if the licensed channel is used by TV service or wireless microphone service. This provides additional information for spectrum management and power control. Implementation issue is very important in cognitive radio generally and spectrum sensing specially, hence we discuss the implementation of cyclostationary features detector and compare its complexity with that of energy detector

A Multi-Criteria Framework to Assist on the Design of Internet-of-Things Systems

The Internet-of-Things (IoT), considered as Internet first real evolution, has become immensely important to society due to revolutionary business models with the potential to radically improve Human life. Manufacturers are engaged in developing embedded systems (IoT Systems) for different purposes to address this new variety of application domains and services. With the capability to agilely respond to a very dynamic market offer of IoT Systems, the design phase of IoT ecosystems can be enhanced. However, select the more suitable IoT System for a certain task is currently based on stakeholder’s knowledge, normally from lived experience or intuition, although it does not mean that a proper decision is being made. Furthermore, the lack of methods to formally describe IoT Systems characteristics, capable of being automatically used by methods is also an issue, reinforced by the growth of available information directly connected to Internet spread. Contributing to improve IoT Ecosystems design phase, this PhD work proposes a framework capable of fully characterise an IoT System and assist stakeholder’s on the decision of which is the proper IoT System for a specific task. This enables decision-makers to perform a better reasoning and more aware analysis of diverse and very often contradicting criteria. It is also intended to provide methods to integrate energy consumptionsimulation tools and address interoperability with standards, methods or systems within the IoT scope. This is addressed using a model-driven based framework supporting a high openness level to use different software languages and decision methods, but also for interoperability with other systems, tools and methods