실험망 환경에서의 IPTV 비디오 성능측정에 관한 연구

IPTV 멀티캐스팅 서비스에서 증가되는 네트워크 트래픽 로드에 따른 화상 품질 측정과 화상 품질 변화에 대한 연구는 IPTV 서비스에 대한 관심이 현실화됨에 따라 필요하게 되었다. 본 연구에서는 네트워크 트래픽 로드에 따른 화상 품질의 효과가 주어지는 네트워크 성능 요소의 최적의 값을 파악하기 위하여, 테스트 베드 네트워크를 통하여 테스트 하는 S/W를 개발하였다. 그리고 테스트 환경을 학교 네트워크로 확장하여 실제 IPTV 서비스 환경과 비슷한 학교 네트워크에서 네트워크 트래픽 로드 증가에 따른 IPTV 멀티캐스팅 서비스의 화상 품질 변화를 측정하고자 하였다. The research of image quality estimation standard and the image quality change according to the network traffic load increase at IPTV multicasting service is necessary because the concern of IPTV(Internet Protocol TV) service become active recently. In the research, for finding out the threshold value of network performance elements giving the effect to the image quality according to the network traffic load, we developed S/W to operate the test bed network and make the test scenario through test bed network test and then we expand the test environment scope to the college network and try to measure the image quality change of IPTV multicasting service according to the network traffic load increase at the college network similar to the real IPTV service environment.

Internet Protocol Television (IPTV) is a service where digital TV signal data is delivered by using Internet protocol (IP). Telecom and network operators focus on IPTV service for its fastest growth, lower price for operators and market economy. With the improvement of broadband connection and technology, IPTV will get more and more importance. Main challenge for IPTV service is resiliency and Quality of Service (QoS) to meet the users Service Level Agreement (SLA). The design space for IPTV service in terms of resilient backbone design, routing algorithms and fast failure restoration shall be explored. It is described from DSL FORUM and leading IPTV service-providing companies. In the context of this work, the PIM-SSM was configured and QoS was implemented for tagged VLAN of multicast traffic. IPTV traffic is analysed in ACREO testbed and Norrksen network.Keywords: IPTV; QoS; Multicast; PIM; PIM-SM; PIM-SSM; VLAN.© 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. DOI: 10.3329/jsr.v1i3.2633 J. Sci. Res. 1 (3), 495-507 (2009)

ICT 기술의 발전으로 인해 IPTV, 인터넷 전화 등 다양한 서비스가 인터넷 기반으로 제공되고, 이러한 서비스가 다수의 사업자 망을 통해 전달되고 있다. 본 연구는 이러한 네트워크 환경에서 서비스의 품질에 가장 많은 영향을 미치고 이용자의 주관적 품질 판단에 결정적인 역할을 하는 종단간 인터넷 서비스 품질 평가에 관해 국제 표준을 기반으로 국내 실정에 적합한 평가 방안을 제시한다. 이 결과, 시간지연, 지연변이, 패킷 손실률이 품질 평가 지표로 선정되었으며 인터넷 서비스 제공자들 간에 정보 공유를 최소화하면서 이를 예측할 수 있는 방안을 전통적인 통계방법을 사용하여 제시한다.

The latest experiences hint that the QoS (Quality of Service) approaches adopted by IMS (IP Multimedia Subsystem) technologies are still suffering from a primary containment factor due to the nondifferentiation between IPTV (Internet Protocol Television) video components. IMS system also cannot ensure high IPTV data transfer due to the limitation of available cellular bandwidth. In this paper, we try to merge the advantage of high bandwidth assigned to LTE (Long Term Evolution) and a new PHB (Per-Hop Behavior) that classify and differentiate between IPTV sub traffics by using IPv6 Flow Label. This new architecture permits high-quality IPTV video components with the capability to prioritize the sub traffic according to the network administrator policy. The proposed architecture is implemented using OPNET software. The results show that IPTV users receive high-quality video data with a change in quantity according to data priority.

In Internet Protocol Television (IPTV) systems, Quality-of-Service (QoS) is a critical factor for user satisfaction. In this paper, we first propose a queueing model for IPTV systems and discuss how to ensure the QoS of IPTV. We then use the model to analyze the effects of IPTV traffic on other applications in home networks. We find that TCP congestion control may not work well under this circumstance and propose a new approach to improve the performance of TCP. We also verify our results throughns2simulations.

Nowadays internet video surveillance cameras are widely use in security monitoring. The quantities of installations of these cameras also become more and more. This paper reports that the internet video surveillance cameras can be applied as a remote sensor for monitoring the concentrations of particulate matter less than 10 micron (PM10), so that real time air quality can be monitored at multi location simultaneously. An algorithm was developed based on the regression analysis of relationship between the measured reflectance components from a surface material and the atmosphere. This algorithm converts multispectral image pixel values acquired from these cameras into quantitative values of the concentrations of PM10. These computed PM10 values were compared to other standard values measured by a DustTrak^TM meter. The correlation results showed that the newly develop algorithm produced a high degree of accuracy as indicated by high correlation coefficient (R²) and low root-mean-square-error (RMS) values. The preliminary results showed that the accuracy produced by this internet video surveillance camera is slightly better than that from the internet protocol (IP) camera. Basically the spatial resolution of images acquired by the IP camera was poorer compared to the internet video surveillance camera. This is because the images acquired by IP camera had been compressed and there was no compression for the images from the internet video surveillance camera.

In this paper, researching for the video quality estimation of IPTV in the situation that increase the broadcasting network traffic on the IPTV multicasting service using the ETSI TR 101 290 that is the European digital video quality standard estimating method and present the experiment result. Proving that the intimate relation is between IPTV video quality and ETSI TR 101 290 estimation, also ETSI TR 101 290 can detect the video quality factors which can't be detected by the exist video estimation methods.

Current advances in embedded hardware for mobile devices, jointly with new type of batteries that let smart phones have more power during longer periods of time, allow them to offer new services to customers. Internet Protocol Television (IPTV) is the Internet Protocol (IP) service that is experiencing highest demand. Many mobile telephone companies are adding this service to their supply. In this chapter, the authors show all steps to transmit the IPTV service from the provider to the smart phone. First, they introduce the current hardware and operating systems for smart phones. Then, they describe the main parts of the IPTV architecture and the main protocols used for IPTV transmission in order to show how it works. Next, the authors show where intelligent systems can be deployed in the IPTV network in order to provide better QoE (Quality of Experience) on the end-user side. Then, they discuss the limitations and requirements for IPTV reception on smart phones. Finally, the authors explain the IPTV implementation in smart phones and describe an IPTV player on Android.

Delivering TV services via internet protocols over high-speed connections is commonly referred to as IPTV (Internet Protocol TeleVision). A particularly interesting aspect of IPTV is the augmentation of the subscriber’s TV experience with interactive applications (apps). Due to the service-oriented infrastructure of many IPTV platforms it is fairly easy to integrate 3rd party services and expose them in form of IPTV apps. However, due to the very competitive market in which IPTV providers operate, they are forced to minimize their costs and thus avoid costly customer complaints. This in turn introduces the need for highly dependable IPTV apps/web services with minimal downtimes. This paper focuses on the development of dependable web services for IPTV. Using Brewer’s CAP theorem the paper investigates the role of state-management within web services and presents the idea of the Enterprise Resource Bus (ERB) and an evaluation of its Erlang implementation.

Vehicular Networks represent one of the main topics in the communication systems area. Increased deployment of vehicular networks together with new possibilities for Internet Protocol Television (IPTV) services has spurred the interest in providing mobile IPTV via vehicular networks. Provisioning of IPTV services over vehicular networks can be expected to play a significant role in the next generation of TV systems. Users will choose IPTV based on the Quality of Experience (QoE). Among QoE measures, TV channel availability is one of the most significant. In this paper, we investigate the channel availability in IPTV services with different traffic intensity and a varying number of TV channels offered to find out the acceptable availability of TV channels or the Call Blocking Probability (CBP) in our study. Comprehensive experiments are carried out by means of our own simulation tool, i.e., a Monte Carlo simulator to conduct the evaluations for numerous scenarios taking into account realistic IPTV user behavior.

An FEC scheme combined with weighted scheduling to reduce multicast packet loss in IPTV over PON

Achieving high robustness and performance in QoS-aware route planning for IPTV networks

PurposeThis paper seeks to investigate the prospects for internet protocol TV (IPTV) from the social, economic and regulatory perspective to gain a better understanding of how IPTV will evolve and stabilize in next generation network environments.Design/methodology/approachQualitative and quantitative data were collected from multiple data collection methods. The analysis is based on theoretical frameworks derived from socio‐technical theories and web of stakeholder analyses.FindingsFrom the socio‐technical analysis, the development of IPTV implies that IPTV has been through internally‐driven change (more or less technology‐driven and regulatory‐constrained), but from now on it will likely be driven by external factors (market and user). The web of stakeholder analysis implies that the further development of IPTV in Korea is likely to comprise multiple stages, predicated by several significant events: the deployment of Broadband Convergence Network and FTTH, the resolving of content issues, establishing standards, and the introduction of new regulatory frameworks.Practical implicationsThe case of Korea offers implications for other countries that are pursuing IPTV development strategies.Originality/valueBy looking at IPTV as a sociotechnical ensemble, this paper seeks a firm understanding of the interaction among IPTV technology, its market, industry, and regulation regarding IPTV. A stakeholder analysis helps this study to address such interactions.

We address the issue of streaming to mobile clients in P2P multimedia system with transcoding technique. Our study is based on the environment of hybrid P2P network, which includes fixed clients and mobile clients in the same system. Fixed clients refer to PC or IPTV connected to the overlay network over a reliable connection and had powerful computing capability to transcode video data into the formats for mobile clients. And oppositely, mobile clients are seen as no transcoding capability, but just transmit transcoded data. In this paper, we propose a model of streaming system with transcoding technique in hybrid P2P network. Based on this model, we give an algorithm to choose the proper transcoding rate sent to mobile clients. The main goal of our design is to increase the video quality and the utilization of bandwidth resource. We compare the performances of P2P streaming system using the proposed algorithm with current designs in the simulation experiment. The results show that, compared to the existing designs, the system implementing our algorithm, the better video quality in mobile clients and higher availability of bandwidth resources can be achieved.

This paper sets out to clarify the confusion surrounding what Internet Protocol Television (IPTV) is by classifying three types of IPTV Computer Based IPTV, Partial IPTV and Full IPTV. By analysing the benefits and pitfalls of each classification a picture emerges surrounding the rich potential to develop additional services for Full IPTV when delivered over a fibre-to-the-premises (FTTP) network. Australia's commitment to invest in a FTTP National Broadband Network (NBN) offers the prospect of Australia becoming leading innovator in this field. Copyright 2010 Jeremy Weinstein. No part of this article may be reproduced by any means without the written consent of the publisher.