• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.4A
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• pp.380-387
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• 2011

While mobile IPTV services are supported through the mobile WiMAX networks, there must need some guaranteed bandwidth for the IPTV services especially if IPTV and non-IPTV services are simultaneously supported by the mobile WiMAX networks. The quality of an IPTV service definitely depends on the allocated bandwidth for that channel. However, due to the high quality IPTV services and to support of huge non-IPTV traffic over mobile WiMAX networks, it is not possible to guarantee the sufficient amount of the limited mobile WiMAX bandwidth for the mobile IPTV services every time. A Service Level Agreement (SLA) between the mobile IPTV service provider and mobile WiMAX network operator to reserve sufficient bandwidth for the IPTV calls can increase the satisfaction level of the mobile IPTV users. In this paper, we propose a SLA negotiation procedure for mobile IPTV users over mobile WiMAX networks. The Bandwidth Broker controls the allocated bandwidth for IPTV and non-IPTV users. The proposed dynamically reserved bandwidth for the IPTV services increases the IPTV user's satisfaction level. The simulation results state that, our proposed scheme is able to provide better user satisfaction level for the IPTV users.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.3
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• pp.69-74
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• 2010

Due to a development of information and communications technology, now we can watch TV show whenever and wherever we want through DMB service. And this is different from existing TV service which we can just enjoy at certain place. Now, I will look into IPTV technology which is basis of Mobile IPTV service. And then, I will introduce Mobile IPTV service which combines the virtues of 'Mobility' of DMB technology and 'two-way communication' of IPTV technology and lets us enjoy two-way TV service at anytime and anywhere. And also I will check the problems of IPTV, on-going trend of Mobile IPTV(in service), and the perspective of Mobile IPTV. Finally, we suggest new fast duplicate address detection scheme in Mobile IPTV to support seamless IPTV packet transmission.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.21 no.1
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• pp.105-116
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• 2011

Mobile IPTV is a IPTV interactive broadcasting service through wireless Internet. Mobile IPTV service would be much more promoted. Thus, the methods for protecting the broadcasting contents will be indispensible elements for the successful Mobile IPTV service achievement. This paper describes the characteristics of Mobile IPTV and the related contents protection techniques. To evaluate several security issues, we suggest a DCAS security framework model for Mobile IPTV, and speculate the most widespread, a security technologies for Mobile IPTV such as DCSA. Moreover, candidate models of Mobile IPTV protection system are suggested based on these technologies.

• Journal of Digital Contents Society
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• v.10 no.1
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• pp.87-96
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• 2009

Digital Broadcast Service is being very popular and the delivery mechanism for digital broadcast content through IP network has progressed constantly, due to the advance of video and audio compression and network technologies. From these trends, in Korea, the commercial IPTV service starts in this year after the law related to IPTV is enacted last year. Since IPTV service, which integrates broadcast and communication services, can give an infrastructure for fusion of communication and interactive multimedia data service, IPTV service is attractive. Recently, by the advent of various wireless connection technologies and the mobile devices of high capability, Mobile IPTV, which has an advantage of not only IPTV but also mobile TV, has gained much interest. In this paper, we review a necessary ingredient for Mobile IPTV in the next generation wired/wireless convergence network environment which consists of heterogeneous wireless access networks. In addition, we propose the scheme for user mobility and service session mobility management using RTSP protocol and introduce the service gateway concept to guarantee the extension of IPTV service platform.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.14 no.5
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• pp.45-53
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• 2014

This study investigated users' usage of mobile video service, users' perception and usage of mobile IPTV. The results show that 82.8% is using mobile video services and 33.6% of the entire respondents has the intention to use mobile IPTV with regards to future usage. They answered that 'various real-time broadcasting' and'mobile IPTV charges' were the major areas of considerations for mobile IPTV users. And we analyzed the most watching contents on mobile IPTV and the willingness to pay for one month. In addition, the main reasons for not using mobile IPTV were the charges for mobile IPTV. Based on these results, action plans for the promotion of mobile IPTV are proposed.

• The Journal of the Korea Contents Association
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• v.10 no.5
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• pp.37-44
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• 2010

The mobility is one of the most important factor for mobile IPTV. However, mobility is highly vulnerable to eavesdropping and unauthorized access. Generally mobility of mobile services is based on handover techniques. But we showed that mobile IPTV must use other techniques to confirm mobility. In this paper, we analyzed security of wibro mobile IPTV from the viewpoint of mobility. We considered DCAS host must include new addresses of mobile devices. We analyzed total number of authentication for the proposed method. So we showed that proposed method was more efficient than wibro-mobile IPTV. We compared the security of our proposal to the security requirements of TTA.

• The Journal of Information Systems
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• v.21 no.4
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• pp.133-153
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• 2012

This study explores the factors influencing user satisfaction of mobile IPTV and their relationship. We formulate the research model based on characteristics of mobile device and IPTV. Responsiveness, contents satisfaction, price satisfaction, aesthetic simplicity, network quality are proposed as essential antecedents of mobile IPTV satisfaction. We also suggest network quality and gender as moderators. Our data analysis with 297 mobile IPTV users shows contents and price have significant positive effect on mobile IPTV satisfaction. Network quality shows positive moderation effect on the relationship between responsiveness and satisfaction.

• Journal of Information Technology Services
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• v.16 no.4
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• pp.99-120
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• 2017

As smartphones and tablets are drastically spreading, mobile IPTV service becomes very important emerging issue in addition to existing DMB broadcasting, and the consumption of personalized multimedia services is increasing in the mobile Internet environment. While the previous research focuses on influencing factors of the initial acceptance intention of the mobile IPTV Service, this study intends to find the factors that affect continuous use intention of the mobile IPTV service which has become one of core services in the mobile environment. The research model and the hypotheses of this study could be derived on the basis of four referent theories (that is, mobile service quality model (MOBISQUAL), post acceptance model (PAM), expectation confirmation theory (ECT) and extended technology acceptance model (ETAM)). In order to empirically test the hypotheses, the field survey was conducted for 278 respondents. Twelve ones of fifteen hypotheses were found to be statistically significantly adopted from the results of structural equation model analyses using Smart PLS 3.0. The theoretical contribution of this study is to empirically investigate the factors that affect the continuous use intention of mobile IPTV service. And the practical contribution is to provide the implementation guidelines of managing the service quality to enhance the competitive power of mobile IPTV business.

• Proceedings of the Korean Society of Computer Information Conference
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• 2010.07a
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• pp.261-264
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• 2010

국내외적으로 IPTV 표준화 및 서비스 기술에 대한 연구가 활발히 진행되고 있고, 국제적으로는 Mobile IPTV를 위한 새로운 기술 개발 및 관련 표준 기술을 선점하기 위해 경쟁이 치열하게 전개되고 있다. 하지만 콘텐츠 다양화와 대량화는 사용자에게 원하는 콘텐츠를 발견할 수 있는 가능성만을 제공할 뿐 사용자가 원하는 콘텐츠를 검색하는데 많은 시간과 노력을 낭비 하게 한다는 문제점이 있다. 이에 본 과제는 온톨로지를 활용하여 Mobile IPTV 관련 기술 연구를 기반으로 효율적인 Mobile IPTV 서비스를 위한 콘텐츠 추천 시스템과 사용자 선호에 따른 온톨로지 구축을 제안한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.1B
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• pp.60-70
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• 2011

IPTV was introduced as the new growth engine of the broadcasting and telecommunications industry and has experienced a high growth rate as its subscribers exceeded 2 million in early 2010. However there have been some doubts on if the IPTV market will keep current growth drift. One of such suspicions is that IPTV market has not been developed by the competitiveness of IPTV industry itself. In addition, the recent slowdown of subscribers' growth and IPTV players' operating at a loss has been suggested as obstacles to the IPTV market growth. This sort of phenomenon has been brought about by ambiguous proposition of IPTV's own value as well as IPTV service positioning gap. To resolve these problems this study empirically investigates what customers want to get from IPTV service by analyzing switching value of IPTV subscribers. This study also identifies which values must be strategically considered to develop next generation IPTV services, in particular mobile IPTV services. Following the investigation, this study analyzes the possible positioning gap of mobile IPTV. Through this analysis, this study suggests which sort of service values need to be reconciled.